US776823A - Heel-compressing machine. - Google Patents

NOMODEL. 4 SHEETS-

SHEET

2, 37 am I No. 776.823- PATENTED DEC. 6, 1904 G. L. ALLEN.

A preferred form of the present invention is illustrated in the accompanying drawings, in which Figure 1 is a front elevation of the machine. Fig. 2 is a side elevation of the machine. Fig. 3 is a horizontal section on

line

3 3 of Fig. 1, showing the heel-blank holder closed. Fig. 3 is a detail view on section-

line

3, Fig. 3. Fig. 3 is a detail view of one of the feedingarms. Fig. 1 is a vertical section on line 1 4: of Fig. 3 and shows the relative position of the several parts when the reciprocating head is-depressed. Fig. 5 is a right-hand side elevation of a portion of the reciprocating head and the feeding-slide to show the combined braking and locking device for the feedingshde. Fig. 6 IS a front view of the same parts. Fig. 7 1s a view. similar to Fig. 5,

showing the parts in the position occupied when the cam has been depressed and the slide is moving in the direction indicated by the arrow. Fig. 8 is an enlarged detail view of the top-lift plate and its supporting and locking devices. Fig. 9 is a sectional view on line 9 9 of Fig- 8. Fig. 10 is a sectional view on

line

10 10 of Fig. 8, showing the position of the top-lift plate when it is being locked. Figs. 11, 12, 12", and 13 show in plan, rear and side elevations a modified form of braking and locking mechanism for the feeding-slide.

3 indicates the driving-shaft, mounted in bearings in the rear portion of the frame of the machine and provided with suitable fast and loose pulleys. The driving-shaft carries a pinion 4:, which engages with a

gear

5 on a

counter-shaft

6. The counter-shaft6 carries a

pinion

7 which engages with a gear 8 on the crank-shaft 9. A

link

10 is connected to the crank-shaft 9 and also to a toggle composed of

members

11 and 12. The toggle member 11 is pivoted at 13 to a rigid portion of the frame near its base. The other toggle member, 12, is pivoted at 1 1 to the

reciprocating head

2.

The reciprocating head supports a heel-mold which comprises a top-

lift plate

10, a

breastplate

21, and laterally-movable side compressing-dies 22 22.

25 indicates a heel-seat die or follower removably supported in the upper portion of the frame 1 in alinement with and in position to cooperate with the mold carried by the

reciprocating head

2.

The side compressing-dies 22 22 are removably supported in

slides

26 26 and are held in place in said slides by

pins

27 27, passed through interlocking ears in the side compressing-dies and the

slides

26 26. The

slides

26 are provided with beveled faces 26, and the

breastplate

21 is provided with beveled faces 21, cooperating with the similar faces on the

slides

26. The faces 21 are provided with undercut grooves, while the

faces

26 are provided with ribs or lugs 26, shaped to be guided in the

grooves

21", (see Fig. 3,) whereby when the

slides

26 are moved to open or close the sides of the mold the

breastplate

21 will also be moved to open or close the front a the pivot-pins slides 26 and connected at their outer ends by pivot-

pins

32 32 with a fixed portion of the frame. (See Figs. 2 and 3.) The arrangement is such that when the

reciprocating head

2 is in its lower position the links extend obliquely from their pivotal connection with the frame to their connection with the

slides

26, and as the

head

2 rises the links are turned into an approximately horizontal po- .sition, and in moving to this position the links move the

slides

26 and force the

breastplate

21 and the side compressing-dies 22 22 together to close the mold. The links are slotted at 30 at their connection with the pivot-

pins

32 to permit the links to slide with relation to said pivot-pins and allow for lost motion, so that the

slides

26 are moved to- Ward and from each other during a portion only of each reciprocation of the

head

2. The pivot-

pins

32 are provided with

eccentric portions

33 where they pass through the

slots

30 in the

links

30. Said pivot pins are adapted to be turned to adjust said eccentric portions in the slots to vary the amount of lost motion. The means shown for adjusting 32, which project through to the front face of the machine-fra1ne, consists in crank-

arms

34, mounted on the squared ends 35 of the pivot-pins. The crank-

arms

34 are adapted to be held in adjusted position by means of clamping-nuts 36. (See Fig. 2.) The direct and positive connection which is provided between the

links

30 and the

slides

26 requires a minimum of parts and avoids the loose movement between these parts which has been an objectionable feature of prior eonstructions in which dust and pieces of leather were liable to accumulate between the members and interfere with the accurate closing of the mold.

It is desirable to have the mold opened during the first portion of the descent of the reciprocating head to release the compressed heel, and inasmuch as the lost-motion connections between the

links

30 and the machine frame prevent said links operating for this purpose compressed springs 37 are interposed between the slides. The springs have their ends inclosed in

sockets

38 in the adjacent faces of the

slides

26. (See Figs. 3 and 4C.)

These s. n'in 's separate the slides durin the first portion of the descent of the head, being strong enough to move the

slides

26 with the dies 22 and the

breastplate

21 and

links

30 for opening the mold. It is undesirable that the parts of the mold be separated by the full throw of the links, because that would open the mold wider than is necessary for the removal of the compressed heel and the insertion of the blank next to be operated upon, so that the blank would be liable to get out of position before being inclosed by the mold. Such extra movement would also occasion unnecessary wear on the parts. In the present machine the lost-motion connection between the upper ends of the

links

30 and the

pivotpins

32 in the frame permits the parts of the mold to be separated less than the full throw of the links. The movement of the parts of the mold is limited by the contact of the

slides

26 with the sides of the frame 1, as shown at s a in Fig. 1. After the dies have reached the limit of their opening movement the slotted links slide with relation to their pivot-

pins

32 during the remaining portion of the descent of the head, said lost-motion connection permittin g the parts of the mold to remain at rest. This construction provides positively-actuated means for insuring that the molds shall be completely opened during the descent of the head even if for any reason the springs fail to operate properly. When the

reciprocating head

2 is rising, the lost-motion connection of the

links

30 to the pivot-

pins

32 permits the links to slide with relation to the said pivot-pins, leaving the parts of the mold separated during the first portion of the rise of the head. After the lost motion has been exhausted the links are actuated during the remainder of the rise of the head and move the

slides

26 to close the mold. It will thus be seen that the closing and opening move ments of the mold take place, respectively, during the last portion of the rise of the head and the first portion of its descent, so that the mold remains open between its compressing operations during a considerable portion of the cycle of the machines operations to facilitate the removal of a compressed heel and the insertion of a blank.

The to p--

lift plate

40 is provided with a stem 4.1, by means of which it is connected to a supporting-

block

42. (See Figs. 8 and 10.) The

stem

41 of the top-lift plate is provided with an

annular groove

43, and on one side it is planed off, as at 44:, from the end of the stem to the groove to a depth equal to the depth of the groove. The supporting-

block

42 is chambered out to receive the stem of the top-lift plate, and in said chamber is provided :1. lug or

shoulder

45. The stem of the top-lift plate is adapted to be inserted into the chamber of the supporting-block with the planedoff side 44: in alinement with the

lug

45, and after the stem has been inserted the top-lift plate may be turned part-way round, so that the

lug

45 will be in the

groove

43 and out of alinement with

theplaned side

44. This connection between the stem of. the top-lift plate and the supporting-block is a form of bayonetjoint. ing the plate and block against relative rotary movement, and to this end a

springpressed bolt

46 is located in the lower portion of the chamber of the

block

42 and is provided with an operatingpin &7, projecting out through a slot and into a depression in the wall of the supporting-

block

42. The

bolt

46 has on its end an

upwardlyqn'ojecting l i p

48, which is adapted to be forced into the space between Preferably means is provided for lock- 7 the planed

side

44 of the stem 11 and the wall of the chamber when the top-

lift plate

10 is in the proper position, and said lip holds the top-lift plate from rotation with relation to the

block

12, and therefore prevents it from being turned into such position with relation to said block as to permit the stem to be withdrawn from the supporting-block.

The supporting-block 4:2 is provided on one side with a

longitudinal groove

50, and a spring-pressed pin or

bolt

51 is mounted for horizontal movement in the bolt 1 1, which has bearing in the

head

2. The inner end of the

bolt

51 extends into the

groove

50 of the supporting-

block

12 to prevent the supporting-

block

12 from being accidentally expelled from its socket in the

reciprocating head

2 and also to prevent rotary movement of said block. The locking-

bolt

51 may be withdrawn by means of an operating

device

52 53 (see Figs. 1 and 9) to permit the removal of the supporting-block and the top-lift plate. The

groove

50 in the supporting-

block

12 is of considerable length in order to permit the supporting-block and top-lift plate to be raised with relation to the

reciprocating head

2 to carry the heel above the walls of the mold, as shown in Fig. 4:.

The

reciprocating head

2 has a

forward extension

2, (seen in Figs. 1, 2, and 3,) which constitutes a table or support for a feeding and ejecting mechanism. The feeding and ejecting mechanism comprises among its parts the

slide

60, movable on suitable guides on the table. Heel-blank-clamping

arms

61 61 are pivotally mounted on the

slide

60. Grasping-

fingers

62 62 are pivotally connected to the

arms

61 at 63 68 and are adapted to be readily removed and replaced by others of a ditferent size, according to the size of the heelblanks to be fed.

64L indicates an abutment on the front end of the

slide

60, which is adapted to engage the breast of the heel-blank.

65 65 indicate springs secured to the

arms

61 61 and acting on the clamping-

fingers

62 62 to turn them toward the

abutment

6 1. The spring-pressed

fingers

62 62 and the abutment 64: constitute a clamp for embracing and holding a heel-blank (see Fig. 3) while it is being fed into position on the top-lift plate 1O and beneath the heel-

seat die

25. The clamp thus formed is adapted to hold heels varying somewhat in size, and it may be adapted to other sizes of heels by removing the

fingers

62 and substituting others of the size required.

The free ends of the

arms

61 are provided with enlargements or shoulders 66 66 to contact with and push a compressed heel off from the top-lift plate and out of the machine when the slide is moved forward to the position shown in Fig. 4: to feed an uncompressed heelblank into position to be compressed. The adjacent faces of the

arms

61 61 opposite their pivotal connections to the

slide

60 are formed as interlocking segmental gears 61. One of said arms has an

extension

67, the end of which lies between two

lugs

68 and 69 on the

slide

60. The lug 68 is socketed and receives a spring-pressed

bolt

7 0, which acts to hold the

extension

67 normally against the

lug

69 and the

arms

61 closed toward each other in position to clamp and hold a heel-blank. The

lug

69 is provided with a guideway to receive a sliding block 71, which is adapted to be moved to force the

extension

67 of the

arm

61 to the left in Fig. 3 to separate the

arms

61 and release a heel-blank.

indicates a cam-plate supported on a

slide

76, vertically movable in suitable ways formed in the side of the table or

extension

2 of the

reciprocating head

2. (See Fig. 2.) The

slide

76 is supported by a pivotal connection at 77 to one arm, 78, of a bell-crank lever which is fulcrumed at 79 on the

reciprocating head

2. (See Figs. 1 and 9.) The other arm, 80, of the bell-crank lever is provided with a

roll

81, which is received in a cam-

groove

82 in a

plate

83, attached to the frame of the machine. The

plate

83 is provided with a

movable latch

84, located in the cam-

groove

82. The

latch

84 is fast on a rock-shaft having an arm 85, to which is attached a

weight

86. The

weight

86 normally holds the rock-shaft in such position that the latch 84: extends across the cam-groove in the position shown in full lines in Fig. 2, but permits the latch to be moved into position shown in dotted lines in said figure. The movable latch 84: divides the cam-

groove

82 into two paths, as shown in Fig. 2, and when the

reciprocating head

2 is rising the roll on the arm of the bell-crank lever moves in the path indicated by the arrows in the righthand portion of the

groove

82, and when the head is descending the roll moves in the path indicated'by the arrows in the left-hand portion of the camgroove. This cam-groove causes the bell-crank lever, pivoted at 79 to the reciprocating head, to impart to the cam-

plate

7 5 a movement independent of the movement of the

head

2 during the first portion of the rise of said head and again during the first portion of the descent of said head, while permitting the cam-

plate

75 to move in unison with the

head

2 during the latter parts of the upward and the downward movements of the head. 'The cam-

plate

75 is moved into contact with the sliding block 71 to open the clamp and release a heel-blank after it has been fed into position to be compressed, and it also holds the clamp open during the retraction of the feeding-

slide

60 to position for receiving another blank. The plate has a face extending parallel with the feeding-

slide

60 and of a length somewhat greater than the extent of movement of the slide. The said face of the cam-plate comprises a lower beveled portion and an upper vertical portion. (Shown best in Figs. 1 and 6.) The plate is moved downwardly with relation to the feeding-slide from the position shown in Figs. 1, 3, and 4 to engage the sliding block 71 for opening the clamp. This movement takes place while the feeding-slide is in the advanced position shown in Figs. 3 and 4. The slide is thereafter re tracted to bring the clamp into receiving position and the vertical face of the

plate

7 5 remains in engagement with the corresponding face of the block 71 during the retraction of the slide and holds the clamp open ready to receive the heel-blank next to be fed.

The

slide

60 has a tailpiece pivotally connected to it at 91 and provided on its rear end with a latch-

bolt

92 to lock it in normal position, as shown in full lines in Fig. 4. The

tailpiece

90 is provided on its lower side with ears suporting a

roll

93.

94 indicates a bell-crank lever pivoted at 95 in the table or

extension

2 of the

head

2. The

lever

94 is forked at its upper end to-engage the

roll

93 on the pivoted tailpiece, thereby forming a detachable connection between the feeding-

slide

60 and the

lever

94. which permits the slide to be removed from the machine when the

tailpiece

90 is unlocked and turned into the dotted-line position shown in Fig. 4. The lower arm of the

lever

94 is provided with a

roll

96. (See Fig. 4.)

99 is a link or rod slotted at its upper end at 100 to receive the

roll

96 and having its lower end portion extended through the

arm

97.

101 indicates a spring inclosed within the

arm

97. The spring surrounds the

rod

99 and has bearing against a

stop

99 on the rod, so that it normally holds said rod in its uppermost position, as shown in Fig. 4, but permits it to be depressed.

The

slot

100 forms a lost-motion connection between the

rod

99 and the

lever

94. During the first part of the rise of the reciprocating head the

roll

96 travels in the

slot

100 and the

lever

94 is not actuated to move the feeding-

slide

60. During the latter part of the rise of the

head

2 the roll comes to the end of the

slot

100, and thereafter the

lever

94 is actuated to move the slide in the direction to retract the blank holder from the mold. When the

head

2 begins to descend, the

roll

96 again travels the length of the

slot

100 without actuating the

lever

94 or causing the

slide

60 to be moved, giving ample time for the workman to inserta heel-blank into the clamp; but after the roll reaches the lower end of the

slot

100 the

lever

94 is actuated to move the feeding-

slide

60 forward to present the blank to the compressing-dies and to eject the heel last compressed. If for any reason the forward movement of the slide for feeding a blank to the dies should be obstructed or interrupted, the spring 101 in the

arm

97 will permit the

rod

99 to be depressed, so

that the

lever

94 is not actuated and the

feedslides

26 when, the feeding-slide reaches the limit of its feeding movement, and on its right-hand side the

slide

60 is provided with an adjustable laterally-projecting

lug

110, having an inclined lower face. (See Figs. 2, 5, 6, and 7.)

111 indicates a plunger which is mounted in the side of the table or extension of the reciprocating head. The plunger 111 is normally pressed upward by a

spring

112. (See Figs. 5, 6, and 7.) The plunger 111 has a

face

113, located in the path of the

lug

110, carried by the feeding-slide, and the plunger is held normally in such a position that the lug contacts with the

face

113 of the plunger and depresses it as the feeding-slide approaches the end of its forward movement in feeding a blank. The plunger acts as a drag or brake to check the forward movement of the

slide

60 after the

abutments

66 have struck the compressed heel for ejecting it. The slide in completing its movement carries the

lug

110 just beyond the plunger 111, which then rises behind the

lug

110 and acts as a lock to prevent rebound of the feedingslide. The plunger 111 has a

projection

114, which stands in the path of the verticallymovable cam-

plate

75, which when said camplate descends contacts with the

projection

114 to depress the plunger out of the path of the

lug

110 before the feeding-

slide

60 is re tracted.

In Figs. 11, 12, and 13 I have shown a modified form of braking and locking mechanism. indicates a lug adjustably secured to the feeding-

slide

60 and corresponding in function to the

lug

110, above described. 131 indicates a spring-plate secured to one of the transversely-movable mold-carrying

slides

26 in position to be engaged by the

lug

130 as the feeding-slide approaches the end of its feeding movement. The spring-plate corresponds in function to the plunger 111, before described. The plate has a

face

132 inclined to the path of travel of the

lug

130 and adapted to be frictionally engaged by said lug. The plate has also a

shoulder

133, which engages behind the

lug

130, as shown in Fig. 12, when the feeding-slide reaches the end of its feeding movement and which locks the feedingslide against rebound. It is to be understood that the feeding-slide advances to feed a heelblank after the

slides

26 have been drawn back to open the mold, the spring-

plate

131 then being in the relation shown in Fig.12 to the path of movement of the feeding-slide. The feeding-slide remains in its advanced position until the mold-carrying

slides

26 have begun to move toward each other, in which movement the spring-plate is carried laterally out of the path of the

lug

130 on the feedingslide, and said slide is then free to be retracted, as shown in Fig. 13.

120 indicates an arm of a bell-crank lever fulcrumed on a rock-

shaft

121, journaled in the

reciprocating head

2. 122 indicates another arm of said lever, and this arm is provided with a cam-

roll

123, adapted to move in a cam-

groove

124 in a

plate

125, supported on the frame of the machine. 126 indicates a movable latch, and 127 a weight for actuating said latch. The

plate

125 and the cam-

groove

124 and also the

movable latch

126 and

weight

127 are similar in all essential respects to the

plate

83, provided with the cam-

groove

82,

-

latch

84, and

weight

86, heretofore described.

The free end of the

arm

120 is directly beneath the lower end of the top-lift-plate-supporting

block

42, and the movement imparted to said arm 120by the cam-

groove

124 causes said arm to raise the said supporting-

block

42 during the first portion of the descent of the reciprocating head or to hold the said block against descent with the said head, whereby a relative movement is produced between the top-lift plate, which constitutes the bottom of the mold, and the side compressingdies, which constitute the side walls of the mold. This relative movement is sufficient to bring the upper surface of the top-lift plate level with the upper surface of the side compressing-dies. This raises the compressed heel, which is supported on the top-lift plate, into the path of the

shoulders

66 of the feeding and ejecting mechanism heretofore described, by means of which the heel is ejected from the machine. The

groove

50 in the supporting-

block

42 and the guide-

pin

51, normally located in said groove, permit the movement of the top-lift plate, but limit its extent, so that the top-lift plate cannot be accidentally thrown out of place. During the rise of the head the cam-

groove

124 causes the top-lift plate to move with the head, mold, and feeding-slide until the cam-

plate

75 has opened the clamp to release the blank which has been fed onto the top-lift plate. Thecam-groove then causes the

lever

120 to be rocked in the direction to lower the toplift plate into its normal position at the bottom of the mold, and thereafter the top-lift plate is permitted to move with the mold.

The operation of the machine is as follows: Vhen the

reciprocating head

2 is in its lower position, the several parts of the mechanism occupy the position shown in Figs. 1, 2, 3, and 4, a heel-blank having been fed onto the toplift plate, as indicated in Figs. 3 and 4, and being still held in the grasp of the clamp. hen the machine is started, the

head

2 begins to rise. The clamp is first opened to release the heel-blank by the cam-

plate

75, which for this purpose is held approximately stationary by the

cam

82 while the head rises. The top-lift plate is also held approximately stationary by the

cam

124 as the head rises. This causes the side compressingdies and breastplate, which at this time are drawn back, to rise around the heel-blank, which is supported on the top-lift plate. In the continued rise of the

head

2 the

arms

61 of the feeding and ejecting mechanism are farther separated by the continued movement of the cam-plate to present a clear space between the mold and the heel-

seat die

25, and said arms are held in this separated position during the first portion of the rise of the

head

2 and during the subsequent retraction of the feeding and ejecting mechanism. The

links

30 for actuating the

slides

26 move with relation to their pivot-

pins

32, and this lost motion permits the side compressing-dies and breastplate to remain separated until said parts have risen and surrounded the heel. During the last half of the rise of the

reciprocating head

2 the side compressing-dies and breastplate are moved to close the mold, and the heel which is in the mold between the toplift plate and the heel-seat die is compressed both laterally and vertically. The feeding and ejecting mechanism is also retracted into position to have a new heel-blank put into the heelclamp during the last half of the rise of the head. During the first part of the descent of the

reciprocating head

2 the side compressingdies are forced apart by the

springs

37 acting on the

slides

26, and the breastplate is also moved back by its connection with the

slides

26. The

arm

120 of the rock-

shaft

121 is actuated to raise the top-lift plate with relation to the side compressing-dies to lift the compressed heel into position to be ejected. 'Ihe cam-

plate

75 is held stationary while the head descends to permit the

arms

61 to close the clamp around the new heel-blank which by this time has been put into the clamp by the workman. During the latter part of the descent of the head the feeding-

slide

60 is moved forward. When near the end of its travel, the

abutments

66 of the

arms

61 strike the heel last compressed and knock it out of the machine,,whcre it falls into the

chute

15,and thereafter the

movement

7 of the slide is checked by the combined brake and locking device. As the slide reaches theend of its travel the

buffer

105 strikes against the

slide

26 and the feeding-slide is simultaneously locked against rebound. This movement of the feeding-slide carries the blank held in the clamp into position on the top-lift plate.