US1090164A - Skiving-machine. - Google Patents

Description

Patented Mar. 17, 1914.

2 SHEETS-SHEET1. M

W 77VES' SE51 F. J. NASH.

SKIVING MACHINE.

APPLICATION FILED JULY 1.1910.

1,090,164. Patented Mar. 17, 1914.

2 SHEETS-BHEET 2.

COLUMBIA PLANOORAPII i0-.WASIIINOTON. D. c.

$TAES PATENT UFFICE.

FREDERICK JESSE NASH, OF SOMEEVILLE, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SKIVING-MACI'IINE.

Specification of Letters Patent.

Patented Mar. 17, 1914.

To all who 11bit may concern:

Be it known that I, FREDERICK J. NASH, a citizen of the United States, residing at Somerville, in the county of lrliddlesex and State of Massachusetts, have invented cerlain Improvements in Skivingddachines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to machines in which pieces of stock are fed successively to stock treating mechanism and is herein shown as embodied in a machine for skiving died-out blanks which are to be made into counters, heel lifts, shoe shanks, box toes and similar articles for use in the manufacture of boots and shoes. It is customary to die out these parts and then to feed the diedout blanks to the skiving mechanism which commonly comprises a roll provided with a cavity the dimensions of which correspond with those of the desired finished piece, a pressure roll for forcing the died-out blank into the cavity, and a fixed knife for skiving off projecting portions of the blank. It is necessary that the blanks should be fed accurately to the skiving mechanism, and hitherto it has been customary to provide rigid guides to engage the edges of the blank during the feeding operation. Certain clifficulties arise in the use of these guides. For example, when a blank is encountered which is narrower at one portion than at another and it is necessary to feed said blank with its narrower portion forward, it is clear that if the rigid guides are adjusted so as to contact with the edges of the narrower portion it will be impossible to feed the blank past them; and on the other hand if the guides are not so adjusted the feeding of the blank will not be properly controlled Accordingly, one object of the present 111- vention is to provide improved guiding mechanism whereby the blanks will be properly presented irrespective of variations in their widths. In the illustrated embodiment this guiding means takes the form of a pivoted, spring-pressed finger which is maintained in engagement with the blank approximately throughout the feeding movement. Preferably two or more of these spring-pressed fingers are provided between which the blank is fed, and means, which maybe formed integral with the fingers, are provided for engaging the face of the blank and holding it firmly against the table or other support upon which it rests during the feeding mo vemcnt. Ordinarily these blanks are superposed to form a pile, the lowermost blank at any given time being the one in position to be fed to the skiving mechanism. in the use of machines of this class wherein the blanks are successively and automatically fedit sometimes happens that a blank becomes ammed in the machine so that the actuating mechanism for the feeding means is subjected to severe strain which may result in breakage.

In order to obviate the possibility ofstrain and breakage, another object of this invention is to provide improved driving mechanism for the feeding means.

In the illustrative machine the lever which actuates the feed slide is yicldinglv urged forward by means of a spring which cbnnects it with a rock shaft, movement in the rearward direction being accomplished by a member fast upon said i'ock shaft and provided with a lost motion connection with said lever. If then a blank becomes jammed in the machine, the spring yields and permits the actuating lever to remain stationary. These and other features of the invention including certain details of construction and combinations of parts will be described in connection with the accompanying drawings and pointed out in the claims.

Referring now to the accompanying drawings,Figure 1 is an end elevation of a machine embodying the invention; Fig. 2 is a perspective showing the feeding and guide- ,ing mechanisms; Fig. 3 is a plan of a portion of the machine showing the guiding members more in detail, a blank being shown in one of the positions it would occupy during the feeding movement; F 4L is a perspcctive of one of the s n'ingpresscd fingers; and Fig. 5 is a detail of the mechanism for operating the feed slide.

The illustrative machine is of that type in which a died-out blank is pressed into a mold or die-cavity by a pressure roll and fed to a knife which skivcs oil a portion of the blank. The dieroll 2 is carried by a shaft 1 which is mounted in bearing blocks one of which is indicated at 8, these blocks being arranged to be adjusted vertically and to be held rigidly in adjusted position by mechanism conssl nected with the adjusting wheel 5. The pressure roll at (see Fig. 3) is carried by a shaft 7 the bearings of which are yieldingly supported by springs one of which is indicated at 9 these springs being adjustable as to tension by means of set screws 11. The shaft 7 has fast to it a large gear 13 which meshes with a small gear 15 carried by the driving shaft 17. The shaft 1 is driven from the shaft 17 through the large gear 19 fast to said shaft an idle gear 21 and a gear similar to the gear 15 but not shown. Rotation of the shaft 17 by any convenient application of power causes the shafts 1 and 7 to be rotated in opposite directions so as to grip the blanks and feed them to a knife 18 (see Fi g. 3) which has its cutting edge arranged parallel with and adjacent to the bite of the rolls.

Mounted on the shaft 7 of the feed or pressure roll and preferably against the face of gear 13 is a cam 23 herein shown as a block loosely mounted on said shaft 7 and adjustably secured in the desired angular position 011 said gear 13 by a pin 25 threaded into the gear and passing through a curved slot in the cam. The function of this cam is to operate the mechanism by which the blanks of leather or other material are fed to the skiving knife. An arm 27 having a slot which embraces the shaft 7 carries a roller 29 with which the cam 23 engages during the revolution of the gear 13. At its opposite end the arm 27 is pivoted to a lever 31 which is adjustably secured to a rock shaft 33. This rock shaft near its central portion carries a second lever 35 which is pivot-ally connected through a link 37 with the feed slide 39; and a coiled spring 41 having one end fastened to the bearing of the shaft 33 and the other end hooked around the side of the lever 31 serves to keep the parts normally in the position shown. A feed plate 13 is slidably mounted in a slot in the feed slide and may be adjusted by means of the screw 45. In order that the feed mechanism may be rendered inoperative without stop ping the machine a hand lever 17 which is fast to a rock shaft 49 is adapted when rotated to contact at its upper end with the link 37. No further description of the portion of the machine thus far set forth will be given since the specific details of its construction form no part of the present invention. It will be clear, however, that rotation of the shaft 17 will cause rotation of the feed roll and the die-roll and actuation of the feed slide. It will also be clear that the timed actuation of the slide with respect to the rotation of the rolls may be varied by adjusting the cam 23 and the feed plate 13 so that the machine may be adapted to operate upon blanks of different dimensions.

Two guide rods 51 are held rigid with the ,frame of the machine by set screws, one of which is shown at 53; and slidably mounted upon th cse guide rods are brackets 55 which are held in adjusted position by set screws 57. The brackets 55 are provided with eX- tensions terminating in bosses 59 in which is mounted a guide rod 61, said rod being held in position by set screws 63. Slidably mounted upon the guide rod 61 are two bosses 65 which are rigid with the rear walls 67 of the skeleton compartment for holding the blanks; and threaded through horizon tal extensions of said walls is an adjusting rod 69 having right and left threads, said rod being rotatably mounted in the brackets 55 but held from longitudinal movement with respect thereto. gether with the rod 61 form a carrier which can be adjusted forwardly and backwardly to accommodate blanks of different lengths; and the walls 67 are adjustable with respect to this carrier to accommodate blanks of different widths. The lower ends of the walls 67 are cut away except for projections, one of which. 71 is shown in dotted lines in Fig. 1; and these projections rest upon the table 73.

At the forward end of the table is a yoke 75 the ends of the arms of which are provided with sockets (not shown) which re ceive upright pins (also not shown) said pins being fixed in the table. A second yoke 77 has two sets of guide rods 79 and 81 which are slidably mounted in the yoke 75. A thumb screw 83 threaded into the yoke 77 and rotatably mounted in the yoke 75 but held from longitudinal movement with re spect thereto serves as a means for raising and lowering the yoke 77. he yoke 75 is provided with extensions 85 in which are carried a guide rod 87 and an adjusting screw 89 having right and left threads said screw being rotatably mounted in the extension but held from longitudinal movement with respect thereto. The forward walls 91 of the skeleton compartment are each provided with two eyes 93 and 95 one of which is slidable on the guide rod 87 and the other threaded upon the adjusting rod 89. From the construction just described it is clear that the yoke 77 forms an adjustable carrier with respect to which the forward walls 91 are in turn adjustable.

In the operation of the machine it should be understood that the blanks are arranged in a pile in the skeleton compartment and that the lowest blank at any given time is the one which is about to be fed or is actually being fed to the skiving mechanism. Mounted upon the table and arranged to receive this lowest blank is a guiding mechanism comprising side guides 97 and yielding fingers 99. The side guides 97 are formed with slotted extensions 101 said eX- tensions abutting with their forward faces shoulders formed on the table 73 as shown The brackets 55 to-- in Fig. 2. Mounted upon these extensions and slotted to correspond with them are supporting members 103. Headless screws 105 threaded into the table extend through the slots in the extensions 101 and well into the slots in the supports 103, and serve in connection with the shanks of the clamping screws 107 to guide the side guides and the supports during adjustment, said clamping screws 107 serving also to clamp the parts in adjusted position.

As has been stated, the machine is designed to operate upon blanks of different dimensions. It happens sometimes that blanks are encountered of which the forward portion (and by forwardportion is meant that portion which is first fed to the rolls) is of less width than the rear portion. Blanks of the type indicated above are referred to merely to promote brevity; and it should be understood that the improved mechanism about to be described is suitable for use with blanks of other contours.

Referring now more particularly to Fig. 3 wherein a shoe shank blank having a forward portion which is narrower than its rear portion is indicated at 200, fingers 99 are pivoted at 109 to the supports 103, said lingers being acted upon by springs 111 which tend to rotate said fingers toward each other, the springs being carried by the supports as shown.

As is shown clearly in Fig. 4-, each finger is formed with a face 113 to contact with the edge of the blank and with an overhanging ii 115 to engage the upper surface of the blank. In order to limit the inward angular movement of the fingers 99 each finger is provided with a stop face 117 which is arranged to contact with a shoulder 119 formed on the support. lVith this construction the side guides 97 and the supports 103 are adjustable with respect to the table as well as with respect to each other; and blanks of varying width, such for example as the one shown, may readily be fed to the operating mechanism since the fingers 99 will yield to permit the wider portion to pass them. It should also be noted that the fingers 99 partially overlie the pressure roll and extend into close proximity to the edge of the knife.

It sometimes happens that a blank be comes jammed in the machine, and certain parts of the feeding mechanism are thereby subjected to severe strain which may result in breakage. This contingency is provided for in the present invention by providing a yielding driving connection between the feeding mechanism and its driving shaft.

Referring particularly to Fig. 5 the lever 35 is carried by a sleeve 121 which is loosely mounted on the rock shaft 33. Fastened to the shaft by a set screw 120 is a collar 123 in which is held one end of a coiled spring 125, the other end of said spring bearing against a lug 127 on the lever The shaft 33 also carries a sleeve 129 fastened to it by a set screw 131. One end of the sleeve 121 is provided with a projection 133 which is received in a suitable rccess 135 in the sleeve 129. Normally the parts are held by the spring 125 in the position shown with the projection 133 in contact with the forward wall of the recess 135, the spring being of sullicient strength to effect the feeding of the blanks. The lever :35 is accordingly rocked forwardly through the medium of the spring 125 and rearwardly through its connection with the sleeve 129. If, however, a blank becomes jammed in the machine the movement of the rock shaft is taken up by the spring 125, the recess 135 permitting forward idle movement of the sleeve 129.

In the operation of the machine the front and rear walls 91 and 67 of the skeleton compartment are adjusted to contact with the edge of the front and rear portion of the blanks which are to be operated upon; the side guides 97 are moved to contact with the sides of the blank and the supports 10 are moved toward each other until they Contact with the lower ends of the members 91. The screws 107 are then tightened to clamp the side guides and supports in position. The cam 2 having been properly adjusted with respect to the gear 3 and the feed plate 13 adjusted, power is applied to the machine. The blanks are thereafter fed forward one at a time, the nature of the cut to which they are subjected depending upon the dimensions of the cavity in the die roll.

Although the invention has been set forth in connection with a particular machine, it should be understood that the invention is not limited in the scope of its application to the particular machine shown and described.

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 of the class described having stock treating means and means for feeding blank pieces of stock thereto, said. feeding means comprising a rock shaft, a member loose thereon, a member fast thereto, one of said members having a projection, and the other having a recess to receive said projection, said recess being of greater extent circumferentially of said shaft than said projection, and a spring fast at one end to said loose member and at the other end to said rock shaft whereby angular movement of said rock shaft in the rearward direction is imparted directly to said loose member while similar movement of said shaft in the forward direction is imparted through said spring.

2. A machine of the class described having stock treating mechanism, a support for a blank piece of stock, a feed slide, and means for actuating said slide and mechanism, in combination with rigid guides for engaging opposite edges of one portion of the blank and yielding guides for engaging opposite edges of another portion.

3. A machine of the class described having stock treating mechanism, a support for a blank piece of stock, a feed slide, and means for actuating said slide and mechanism, in combination with rigid guides adjustable with respect to said support and yielding guides carried by said rigid guides.

at. A machine of the class described having stock treating mechanism, a support for a blankpiece of stock, a feed slide, and means for actuating said slide and mechanism, in combination with rigid guides adjustable with respect to said support and yielding guides carried by said rigid guides, said yielding guides being adjustable With respect to said rigid guides.

5. A machine of the class described having stock treating mechanism, a support for a blank piece of stock, a feed slide, and means for actuating said slide and mechanism, in combination with rigid guides for engaging opposite edges of one portion of the blank and yielding guides for engaging opposite edges of another portion, the twosets of guides being adjustable with respect to each other.

(3. A machine of the class described hav ing stock treating mechanism, a feed slide and means for actuating said slide and mechanism in timed relation, in combination with guiding means between which said slide is moved, said means comprising guides having operative faces a given distance apart and yielding guides having operative faces a less distance apart whereby a blank having one portion which is wider than another may be fed past said yielding guides to said stock treating mechanism.

7. A machine of the class described hav- 45 ing means for operating upon stock and means for feeding a piece of stock thereto in combination with guides for engaging the opposite edges of the rear portion of the piece and front guides for similarly engaging the front portion, said rear and front guides being independently adjustable.

8. A machine of the class described having stock treating mechanism, a support for a blank piece of stock, a feed slide and means able toward and from each other as Well as toward and from the stock treating mechanism, forward Walls, means for adjusting said forward Walls simultaneously toward and from each other, and means for adjusting said forward walls simultaneously toward and fromthe support.

9. A machine of the class described having stock treating means, a support for a blank piece of stock, a feed slide and means for actuating said slide, in combination with two pairs of guides between which the blank is fed, the members of one pair being rigidly and those of the other pair yieldingly mounted.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

FREDERICK JESSE NASH.

Witnesses F. T. TAPPAN, OMAR EBENHAOK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, I). G.

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