US2091363A - Splitting machine - Google Patents

Description

Aug. 31, 1937. E. A. HOLMGREN SPLITTING MACHINE I Filed Dec. 30, 1935 2 Sheets-Sheet 2 Patented Aug. 31, 1937 UNi'lED STATES isti PATENT creme 2,091,363 SPLITTING MAoiiINE Application December 30, 1935, Serial No. 56,652

11 Claims.

This invention relates to splitting machines and is herein illustrated as embodied in a machine for dividing a sole blank into a skeleton insole forepart having in it an opening, and an outsole having in its forepart a projection which is the counterpart of said opening. a

In the manufacture of a certain type of shoe, it is desirable to split a sole-shaped blank into the two articles named above. After this has been done a shank piece is attached to the skeleton insole forepart to provide an insole which is then used, together with an outsole of the kind described, in the manufacture of a shoe. In order to accomplish the splitting or dividing opation rapidly and accurately, it is desirable to make use of a splitting machine one of the rolls of which is a matrix roll.

According to one feature of the invention, the rolls are so constructed and operated that they come to rest with a gap between them through which the forward portion of a sole blank which is to be split is thrust to present it to the machine, the rolls when rotated feeding the blank out of the machine past a knife the cut of which begins at a locality spaced from the heel end of the blank, for example in the forward part of the shank portion of the blank, and extends through the toe end thereof, a pair of separable gages being provided which are preferably held apart until after a blank has beenthrust between them and are then closed upon the edges of the blank.

This and other features of the invention including certain details of construction and com- 35 binations of parts will be described as embodied in an illustrated machine and pointed out in the.

appended claims.

Referring to the acccompanying drawings, Fig. 1 is an end elevation of the machine in which the present invention is embodied;

Fig. 2 is a perspective showing a piece of work which has been operated upon by the machine;

Fig. 3 is a vertical cross-section of the machine through the matrix and patrix rolls;

Fig. 4 is a perspective showing more particularly the construction and mounting of the ball-line gages;

Fig. 5 is a longitudinal cross-section of the matrix and patrix rolls showing a piece of work in process of being split; 7

Fig. 6 is a transverse cross-section of the members shown in Fig. 5, the rolls being in a different position.

The purpose of the machine, as has been ex plained, is to divide a sole blank, as shown in Fig.

2, into a skeleton insole forepart it having an opening 200, and an outsole 3E8 havingin its forepart a projection 498 which is the counterpart of the opening. In the manufacture of a shoe a shank piece is attached to the skeleton insole forepart to produce a complete insole. This insole is assembled, together with an upper, upon a lastg the margin of the upper is lasted over uponthe insole, and the outsole is attached, for example by cement, with the projection 189 extending into the opening 20!]. h

The work-engaging members for operating upon a sole blank to produce the two members shown in Fig. 2 comprise (Figs. 4 and 6) a matrix roll 9, a patrix roll II and a stationary knife 13. The matrix roll is cut away to provide a flat face I5; and, when the rolls come to rest after having made one revolution, this flat face is opposite to the patrix roll so that there is a gap between the rolls. The sole blank is presented to the machine (Fig. fl) by being thrust toe foremost through the gap (and between certain gages presently to be described) until its toe end contacts with a toe-- end gage l1. Thereup o'n power is applied to the machine to cause the rolls to rotate as indicated by the arrows and to cause the It'oe-end gage l! to push the sole blank toward the rolls. As soon as the rolls have gripped the blank firmly, the toe-end gage is withdrawn, and the rolls feed the sole blank to the knife and finally out of the machine, the cut of the knife starting for example at the line 19 (Fig. 2), located at about the junction of the shank portion with the forepart, and continuing through the toe end of the blank. At the proper time in this dividing or splitting operation, the blank is distorted (Fig. 5) by the cooperative action of the matrix 21 and the patrix 23 to produce the opening 253B (Fig. 2) in the insole forepart and the corresponding projection 400 on the forepart of the outsole. The machine has two pairs of matrices and patricesalthough Only one pair has been shownand is thus capable' 'of operating upon two sole blanks at the same time,

Except for the shapes of the rolls, and the construction and mode of operation of certain gages, the machine is or may be substantially the same as the machine disclosed in UnitedStates Letters Patent No, 1,382,689, granted June 28, 1921, on an application filed in the name of William C. Stewart; and before proceeding to a detailed description of the new features, the old construction will be briefly indicated. The bearings of the upper or matrix roll are vertically slidable in guideways in the frame, are urged upward by springs and may be moved downward to adjust the matrix roll in proper position above the lower or patrix roll to provide for blanks of different thicknesses. The matrix roll comprises a removable and replaceable outer sleeve in which the matrices are out, said sleeve being connected with its shaft 23 in such manner that it may be caused to rotate exactly with the shaft or it may be accelerated during an interval during the rotation of its shaft. The purpose of this construction is to avoid the necessity of providing a large number of different matrices. The matrices are shaped for operation upon sole blanks of the largest size; and, in order to shorten the lengths of the opening 200 and the projection 40!], the matrix sleeve is accelerated relatively to the rate of rotation of the patrix roll. When the matrix sleeve is accelerated, it slips upon the blank and completes its revolution before the revolution of the patrix roll is completed; and, in order to I stop the matrix sleeve in a proper position of rest to receive another sole blank, its movement is arrested after it has made a complete revolution, and the patrix roll continues to rotate until that roll has completed a revolution. In the patented machine the lower roll is a toothed roll and has no patrix. In the machine of the present application the patrix is made relatively small to permit this slipping of the matrix roll on the work. The bearings of the patrix roll are normally held up against stops by heavy springs, one of which is shown at 25, and the stationary knife I3 is mounted on the frame of the machine with its edge close to the bite of the rolls. The toe-end gage ll and certain side or edge gages, later to be described, are mounted on a horizontally reciprocating carriage 21 actuated by parallel links 29, said carriage coming to rest in its position most remote from the rolls.

Assuming that the machine is at rest, the operator thrusts two sole blanks toe ends foremost between the respective pairs of matrices and patrices until the sole blanks contact with the toe-end gages I1 and depresses a treadle 3| (Fig.

1' 1) whereupon the rolls start rotating and the carriage 27 starts to move toward the rolls. As soon as the rolls have obtained a firm grip on the sole blanks, the carriage moves back away from the rolls. The rolls then feed the sole blanks past the knife I3 to divide the blank into the skeleton insole forepart Hill and the complementary outsole 300 shown in Fig. 2.

The patented machine has end gages corresponding to the end gages I1 and two pairs of side or edge gages corresponding to the gages 33, 34 (Figs. 3 and 4). In the patented machine, however, the sole blanks are presented heel ends foremost, the gages which correspond to the end gages ll engaging the heel ends of the soles, and the side or edge gages which correspond to the gages 33, 34 engaging opposite edges of the soles at about the heel breast lines. The gages 33, 34 of the present machine will be termed tip-line gages, since they engage opposite edges of the sole blank at about the line of attachment of the tip in the finished shoe. These tip-line gages, as well as the toe-end gages, are constructed and mounted like the corresponding gages of the patented machine. Referring to Fig. 3, which shows one member of one pair of tip-line gages, the gage 33 is carried at the outer end of the long arm of a bell-crank lever 35 pivoted about the stem of a screw 3'! which is threaded into the reciprocating carriage 21. The short arm of the bell-crank lever 35 has formed in its outer end, a

segmental gear 39 which meshes with a similar segmental gear carried at the outer end of the short arm of the other bell-crank lever (not shown) at the outer end of the long arm of which the other tip-line gage 3d of the pair is carried. A tension spring il, fast at one end to a pin 63, driven into the carriage 21, and at the other end to one of the short arms of the bell-crank levers, tends at all times to move the gages toward each other as far as a stop (not shown) will permit. These gages are thrust apart as shown in Fig. 4 when a sole blank is presented to the machine. No further description of the machine as thus far outlined will be given, reference being made to the patent for further details. It may be noted, however, that the matrices of the patented machine are shaped to cause the knife to skive the shanks of soles.

In order to coperate with the toe-end gages, one of which is shown at Ill, and the tip-line gages, one pair of which is shown at in locating sole blanks in position to be received properly by the rolls 9, ll, there are provided two pairs of gages which will be termed ball-line gages, since they engage opposite edges of the sole blanks at about the ball lines of said blanks. One pair of these ball-line gages is shown (Fig. 4) at 55, ll; and since the two pairs are alike, only one pair will be described in detail. The ball-line gage 45 is pivoted at 59 to the lower end of the long upright arm of a bell-crank lever 5!, the short horizontal arm of which terminates in a segmental gear 53, the bell-crank lever 5i being pivoted at 55 to a bar El which is fastened by cap screws 553 to a part of the frame of the machine extending over the rolls 9, I l The gage 45 has a tail or projecting portion M5 which is pivoted at 5! to the lower end of a link the upper end of which is pivoted at t5 to a stationary bar 64. The distance between the axes of the pivots 55, is equal to the distance between the axes of the pivots 49 and 6! so that a parallel motion is imparted to the gage '35 when the bel1- crank lever 5| is swung. The other gage ll of the pair is carried in the same manner at the lower end of the long upright arm of a bell-crank lever 61 pivoted to the bar 5? at 59; and a link H like the link 63 is pivoted at its upper end to the bar 64 and at its lower end to a tail or projection on the gage 41. The short horizontal arm of the bell-crank lever El terminates in a segmental gear 13 which meshes with the segmental gear 53. The gages d5, 41 are at all times urged to move toward each other by a tension spring 15, which connects them, as far as a stop screw ll (Figs. 1 and 3) will permit, said stop screw being threaded through a lug or bracket on the bar 51 and being adapted to contact with the upper edge of the short horizontal arm of the bell-crank lever 5|. The ball-line gages a5, a!

are thus mounted for parallel motion and are normally spaced apart a distance less than the width at the ball line of the smallest sole blank to be operated upon. The machine may be used with the mechanism thus far described, in which case the forward end of a sole blank when it is started. To this end a short arm 19 fast to 'a rockshaft 8| is caused to engage the short arm of the bell-crank lever and swing it down about its pivot 55, thereby causing the long upright .5 arms of the bell-crank levers 5|, 6'! to swing equally away from each other. The rockshaft Bi is rotatably mounted in bearings rigid with the frame of the machine and has attached to it the hub of an operating arm 83 to the outer end .10 c-f which is pivoted at 85 the upper end of a rod 8'5. The lower end of this rod (Fig. 1) is pivoted at 89 to the same pivot to which is pivoted the upper end of a treadle rod 9! downward movement of which starts the machine. The lower 5 end of the treadle rod 9| is pivoted at 93 to the outer end of an arm 95 the hub of which is fast to a rockshaft 91 rotatable in bearings in the frame of the machine. Also fast to this rock shaft is the hub of the treadle 3|, said treadle being normally held up by a tension spring ml attached at its lower end to the treadle and at its upper end to the frame of the machine. When the machine comes to rest, the treadle 3! is in raised position and the arm 19 is holding the ballline gages apart. When the treadle is depressed, the arm 19 is swung up to release the ball-line gages, and power is applied to the machine, whereupon, as has been explained, the carriage 2i feeds the sole blank until it is gripped by the rolls which then feed'it past the knife. It will be understood that there is mounted upon'the rockshaft 88 another arm corresponding to the arm 19 which acts to hold the other pair of ballline gages open when the machine comes to rest. Assuming that the machine is at rest with the rolls 9, H in such position that the-re is a gap between them, with the carriage 2'! in its position most remote from the rolls and with the ballline gages. and 4! held widely spaced apart, 40 the operator presents two sole blanksto the machine. Inasmuch as these twosole blanks are presented to the machine and operated upon in the same manner, the presentation of one blank and the operation upon it will be described. The ,45 Sole blank is thrust between the gap in the rolls in the manner indicated in Fig. 4, the toe end of the blank forcing apart the tip-line gages 33, 3 and contacting with the toe-end gage If. The operator now depresses the treadle 3!, .50 whereupon the ball-line gages 45, 41 close upon the sole blank to aline it properly with the matrix in the roll, the carriage 2'! begins its forward movement, and the rolls begin to rotate in the direction indicated by the arrows. As soon as the sole blank has been firmly gripped by the rolls, the carriage 21 is withdrawn and the blank is fed past the knife 13 to produce the result shown in Fig. 2. In order to ensure that the blank shall be fed completely past the edge of (so the knife, a pusher in the form of a small blade I03 (Fig. 6) carried by the matrix roll engages the toe end of the blank near the end of the splitting operation. If the mechanism for holding the ball-line gages apart when the machine 65 is at rest is not present, the sole blank forces these gages apart when it is thrust between them. Although the invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in 70 the scope of its application to the particular machine which has been shown and described. It should also be understood that although the insole forepart I00 has been shown with an opening 280 which extends through it, this opening 75 may extend only part way through if desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine for splitting a blank having, in combination, a pair of rolls having when at rest a gap between them through which the blank may be thrust in one direction, a knife past which the blank is fed in the other direction when the rolls are rotated, a pair of separable gages locatedon the opposite side of the rolls from the knife and adapted to receive the blank between them, a member acting when the machine is at rest to hold the gages in separated relation, and operator-controlled means for causing the gages to close upon the blank.

2. A machine. for splitting a blank having, in combination, a pair of rolls. having when at rest a gap between them through which the blank may be thrust in one direction, a knife past Which the blank is fed in the other direction when the rolls are rotated, a pair of separable gages located on the opposite side of the rolls from the knife and adapted to receive the blank between them, a member acting when the machine is at rest to hold the gages in separated re lation, a treadle manipulation of which starts the machine, and connections between the treadle and the member for causing the gages to close upon the blank when the treadle is manipulated.

3. A machine for splitting a blank having, in combination, a pair of rolls having when at rest a gap between them through which the blank may be thrust in one direction, a knife past which the rolls when rotated feed the blank in the other direction, a pair of separable gages located on the opposite side of the rolls from the knife and adapted to receive the blank between them, yielding means urging the gages to- Ward each other, a member acting normally to hold the gages in separated relation, and operator-controlled means for moving the member to release the gages after the blank has been thrust between them.

4. A machine for splitting a blank having, in combination, a pair of rolls having when at rest a gap between them through which the blank may be thrust in one direction, a knife past which the rolls when rotated feed the blank in the other direction, a pair of separable gages located on the opposite side of the rolls from the knife and adapted to receive the blank between the-m, yielding means urging the gages toward each other, a member acting normally to hold the gages in separated relation, a treadle manipulation of which starts the machine, and connections between the treadle and the member for releasing the gages when the treadle is manipulated.

5. A machine for splitting a sole blank hav ing, in combination, a pair of rolls having when at rest a gap between them through which the sole blank may be thrust in one direction, a knife past which the rolls when rotated feed the blank in the opposite direction, a stationary member located above the rolls, and a pair of separable ball-line gages suspended from the member in position to receive between them the ball-line of a sole blank thrust through the gap between the rolls.

6. A machine for splitting a sole blank having, in combination, a pair of rolls having when at rest a gap between them through which the sole blank may be thrust in one direction, a knife past which the rolls when rotated feed the blank in the opposite direction, a stationary member located above the rolls, a pair of separable ballline gages suspended from the member in position to receive between them the ball line of a 5 sole blank thrust through the gap between the rolls, means for holding the gages in separated relation when the machine is at rest, and means operated when the machine is started to cause the gages to close on the blank.

7. A machine for splitting a sole blank having, in combination, a pair of rolls having when at rest a gap between them through which the sole blank may be thrust in one direction, a knife past which the rolls when rotated feed the blank in the opposite direction, a stationary member located above the rolls, a pair of separable ballline gages suspended from the member in position to receive between them the ball line of a sole blank thrust through the gap between the rolls, a rockshaithaving an arm for controlling the relative positions of the gages, means for holding the rockshaftwhen the machine is at rest in an angular position to maintain the gages in separated relation, and operator-controlled means for causing the gages to close upon opposite edges of the blank.

8. A machine for splitting a sole blank having, in combination, a pair of rolls having when at rest a gap between them through which the sole blank may be thrust in one direction, a knife past which the rolls when rotated feed the blank in the opposite direction, a stationary member located above the rolls, a pair of separable ballline gages suspended from the member in position to receive between them the ball line of a sole blank thrust through the gap between the rolls, a rockshaft having an arm for controlling the relative positions of the gages, means for holding the rockshaft when the machine is at in an angular position to maintain the gages in separated relation, and means operated when the machine is started to cause the gages to close on the blank.

9. A machine for splitting a sole blank into an insole forepart having an opening therein and an outsole having in its forepart a projection which is the counterpart of said opening having, in combination, a pair of rolls a portion of the periphery of one of which is cut away,

means for rotating the rolls and for bringing them to rest with the cut-away portion opposite to the other roll so that there is a gap between the rolls, a knife past which the blank is fed by the rolls, a toe-end gage and separable tip-line gages located on the opposite side of the rolls from the knife in position to be engaged by a sole blank thrust through the gap between the rolls, separable ball-line gages located between the tip-line gages and the rolls, yielding means urging the ball-line gages toward each other, a member acting to hold the ball-line gages in separated relation when the machine is at rest, and operator-controlled means for moving the member to release the ball-line gages and permit them to close upon the sole blank.

10. A machine for splitting a sole blank into an insole forepart having an opening therein and an outsole having in its. forepart a projection which is the counterpart of said opening having, in combination, a pair of rolls a portion of the periphery of one of which is cut away, means for rotating the rolls and for bringing them to rest with the cut-away portion opposite to the other roll so that there is a gap between the rolls, a knife past which the blank is fed by the rolls, a toe-end gage and separable tip-line gages located on the opposite side of the rolls from the knife in position to be engaged by a sole blank thrust through the gap between the rolls, separable ball-line gages located between the tip-line gages and the rolls, and yielding means urging the ball-line gages toward each other.

11. A machine for splitting a sole blank into an insole forepart having an opening therein and an outsole having in its fo'repart a projection which is the counterpart of said opening having, in combination, a pair of rolls a portion of the periphery of one of which is cut away, means for rotating the rolls and for bringing them to rest with the cut-away portion opposite to the other roll 50 that there is a gap between the rolls, a knife past which the blank is led by the rolls, a toe-end gage and separable tip-line gages located on the opposite side of the rolls from the knife in position to be engaged by a sole blank thrust through the gap between the rolls, separable ball-line gages located between the tip-line gages and the rolls, yielding means urging the ball line gages toward each other, a member acting to hold the ball-line gages in separated relation when the machine is at rest, a treadle for controlling the operation of the machine, and connections between the treadle and the member for moving the member to release the ball-line gages and permit them to close upon the sole blank when the treadle is manipulated.

ERIC A. HOLMGREN.

I I CERTIFICATE or CORRECTION. Patent No, 2,091,565. August 51, 1957.

7 ERIC A HOLMGREN.

It is hereby certified that error appears in the printed specification .of the above numbered patent requiring correction as follows: Page .1., second column, line 59, claim 11', for the Word 1ed" read fed; and that the said Letters Patent should be read with this correction therein that the seme may conform to the record of the case in thePatent Office. Signed and sealed this 18th (lay of January, A. D. 19 8.

Henry VanArsda le, I (Seal) Acting; Commissioner of Patents.

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