US2031744A - Cutting machine - Google Patents

Description

J. F. SMITH CUTTING MACHINE FQh 25 1936.

Filed June 7, 1954 2 Sheets-Sheet 1 ATTORNEYfi Patented Feb. 25, 1936 UNITED STATES PATENT OFFICE C TT MACHI E Application June 7, 1934, Serial No. 729,403

8 Claims.

This invention relates to slashing machines which are useful chiefly in shoe manufacturing operations.

A particular object of the present invention is to provide a machine for making one of the cuts for severing the complementary insole-outsole combinations shown in U. S. Patents Nos. 1,838,708 and 1,902,725, issued to F. Sbicca. In accordance with the showings in those patents, insoles and outsoles are cut from a single piece of stock in such a manner as to form an insole having a perforate forepart and an outsole having its forepart landed to mate with the insole. One method of forming these parts involves making a series of cuts in the stock, and the machine of the present invention is primarily adapted to make a beveled cut or slash which extends across the stock approximately at the ball line and which constitutes one of the cuts used to separate the insole from the outsole.

While the present invention accordingly is primarily useful in the above manner, certain benefits thereof may be obtained generally in other beveling and slashing operations. It is therefore contemplated that it may be used in any such operation to which its nature adapts it.

Further objects of the invention are to provide a machine of this kind which is rugged and efficient in its operation and with which the operator can readily perform the required operations.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the fea-- tures of construction, combination of elements, and arrangement of parts, which will be exemplifled in the construction hereinafter set forth and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawings, in which:

Fig. 1 is a plan view of a machine embodying features of the present invention;

Fig. 2 is a longitudinal vertical sectional view taken along line 2 of Fig. 1;

Fig. 3 is a transverse vertical sectional view taken substantially along line 3.-..3 of Fig. 2;

Fig. 4 is a transverse vertical sectional view taken along line 4-.-4 of Fig. 2 and looking in the direction of the arrows; and

Fig. 5 is a fragmentary plan view showing :the relationship of certain parts of the machine.

Referr n mo e. particularly to the rawings.

there is shown a base ID in the form of a generally rectangular casting provided with an upper bed plate or table II. Spaced upright journals l2 and I3 extend from this plate and have rotatably mounted therein a cam drive shaft M which 5 is adapted to be power driven in the manner hereinafter described so as to operate a knife and a work clamping mechanism. A pair of cams I5 and I6 are eccentrically mounted on shaft I4 between journals I2 and 13. These cams are keyed to shaft M as by means of one or more pins such as ll. If only one pin is used, the abutting Surfaces of cams I5 and It may be provided with suitable interlocking contours (not shown) to insure their rotation in unison. These cams operate the hereinafter described work clamping m an Disposed between cams i5 and I6, and preferably integrally formed with one thereof, is an eccentric I8, about which is strapped a knife operating pitman l9. At its forward end this pitman is pivotally attached at to a knife holder 2| (Fig. 2) which has a knife 22 disposed thereover. The tail portion of this knife is bifurcated as shown and is held against holder 2| by means of a holding plate 23 and screws 24 which latter pass between the forks of the knife tail. The knife holder 2| is slidably mounted on an inclined guideway 25 (Fig. 2) located on the upper portion of a work clamp or presser foot 26 which is adapted to hold the. sole while the knife is operating. Holder 2! is confined in its guideway by retaining plates 2'! which overlap the lateral edges thereof.

The presser foot 26 comprises the forward portion of a lever 28 which is pivotally mounted on the base at 29. A pair of spring housings 30 and 3! respectively underlie cams l5 and I6 and are mounted on lever 28. Presser springs 32 and 33 are respectively confined within these housings at a predetermined pressure by slidable spring bolts 34 and 35, the upper heads of which are respectively adapted to be maintained in rubbing contact with cams I5 and 16 by means of a tensionspring 36 which extends between a portion of journal l2 and clamping lever 28, giving the latter a normal bias upwardly. Clamping lever 28 is provided with an adjustable stop screw 31 which is adapted to limit downward move.- ment thereof through contact with the surface of bed plate H. The forward under surface of presser foot 26 is provided with a work contacting plate 38 which may be ribbed, toothed or otherwise suitably roughened to afford a firm grip against work confined therebeneath.

ing means.

In the preferred use of the machine this work takes the form of a complementary insole-outsole blank indicated at 39. Prior to its introduction to the present machine this blank is suitably rounded out to approximately its final contour, and has a thickness corresponding to the combined thickness of the ultimately formed insole and outsole portions.

Positioning gages are provided for locating such blank with respect to the knife. These include a toe abutting gage 49 which is attached to a slidable rack 4| for movement therewith by means of pin connections 42 which extend through a suitable slot 43 in the bed plate I I. A pinion 44 is in engagement with rack 4| and is mounted on a shaft 45, which in turn is rotatably and slidably journaled in a bearing 46 forming part of the base IE) (Fig. 3). At its outer end shaft 45 has a manually operable adjusting knob 4! keyed thereto. This knob has its inner face toothed or serrated as at 48 and these teeth are adapted to lock against similar teeth on a fixed disk 49 attached to base l9. A spring 58 gives shaft 45 and knob 4i a normal bias toward disk 49, which bias may be overcome by pulling knob 41 out sufficiently to disengage the teeth at 48, at which time the shaft 45 may be rotated so as to operate rack 4! and toe gage 40 which is carried therewith. Knob 41 is suitably calibrated as at in order properly to locate toe gage 40 for any desired sole size.

In addition to toe gage 40 there are provided side gages 52 and 53 which respectively are adapted to cooperate with left and right soles. These gages are mounted on a common transverse sliding bar 54 which is suitably pinned at 55 to a transverse rack 55. This rack is operable by pinion 57 which is keyed to a longitudinally extending shaft 53 having its forward end extending through the front wall of base I8 and provided with a manually operable knob 59. As in the case of knob 41, this side gage control knob 59 is preferably calibrated with respect to a fixed mark on the base so that gag- es 52 and 53 may be slidably positioned to accommodate different sole sizes and may readily be correlated with the toe gage. As is clearly shown in Fig. 1, gages 52 and 5-3 are used alternatively, and when, as in that figure, a left sole is being positioned, a three-point control of the sole is afforded through contact of the latter with the toe gage 48 and with two points along the side gage 52. The rack 56 controlling the side gages is adapted to be locked in any desired position by means of a locking bar 69, best shown in Figs. 1 and 4, which is pivoted to a block 6| screwed to the under side of bed plate II. Bar 60 is provided with a lateral projecting finger 62 which is adapted to be slidably positioned between adjacent teeth on rack 56 and there to be held by means of a spring pressed plunger 63 (Fig 4) abutting against the under side of bar 68. When it is desired to adjust the side gages, this locking bar is depressed by hand.

The described gage means effectively control the position of the knife cut laterally and longitudinally of the sole, and also control the angular location of such out with reference to the long axis of the sole.

A one-revolution driving clutch is provided for operating the above described knife and clamp- This driving mechanism includes a pulley 64 which is freely rotatable on an extension I4 of the cam shaft I4, and is confined against inward movement therealo'ng by means of a collar I4" forming a part of such shaft. A clutch sleeve 65 is slidably keyed on shaft I4 between collar I4" and the adjacent face of journal I2 and is given a normal bias toward pulley 64 by means of spring pressed fingers 55 which are pocketed in journal casting I2. This clutch sleeve is provided with one or more recesses 6'! into which corresponding pins 68, which are carried by the pulley 64, are adapted to fit in driving relation during such time as the slidable clutch sleeve 65 is held in interfitting engagement therewith by means of plungers 66. Clutch sleeve 65 is adapted to be disengaged from driving pins 68 by means of a vertically disposed spring pressed plunger 69 which normally presses against the surface of a cam track 19 running about the periphery of sleeve 65. This track has an offset cam portion H which, as it slides past plunger 69, forces sleeve 65 axially along shaft I4 and out of engagement with the driving pins. A depression 12 is located in the track 1!] opposite cam 'II and affords entry to plunger 69, which latter holds the clutch sleeve 65 stationary in non-driving position once it enters such depression. A rod .'3 is adapted to be operated by any suitable foot treadle mechanism (not shown) and is attached to plunger 69 in order to depress the latter when desired. As shown in the drawings, the various operating parts associated with this driving clutch are in the driving relation which obtains about midway of the operating stroke of the knife, plunger 69 being in sliding contact with the track 19 but out of engagement with cam II so that the sleeve 65 is in driving relation with pin 68 and thus transmits motion to the shaft I4 from pulley 64, which is constantly rotated by a suitable driving belt.

As shown in Fig. l, a counting device '34 is operatively attached at one end of shaft I4 so as to register each rotation thereof. Since the shaft only rotates once to each sole treating operation, this arrangement accurately records the amount of Work done on the machine.

In operation, a complementary insole-outsole blank which has been rounded out to determined size is provided. The knobs 41 and 59 are adjusted by means of their respective calibrations to correspond to the selected sole size, the. right or left gages 52 and 53 being alternately used as the nature of the particular sole to be operated on requires. With the gages properly positioned, the sole blank is located thereagainst in three -point contact, as explained above, and the foot treadle rod 13 is depressed by the operator. This removes plunger 69 from depression 12, and the retraction of plunger 69 is continued sufficiently to clear it from track 19 so that plungers 66 are free to press clutch sleeve 65 toward rotating pulley 64. Pins 68 enter recess 61 and impart driving motion to sleeve 65. When this motion has proceeded sufficiently to advance cam H beyond the vicinity of plunger 69, such plunger may be released by the operator into sliding contact with the cam track, and upon one complete revolution of the clutch sleeve, plunger 69 will, through engagement with cam II and entry into depression 12, effect disengagement and stoppage of the clutch sleeve. During rotation of shaft I4 the cams I5 and I6 which are carried therewith press against the spring bolts 34 and 35 and this pressure is transmitted through springs 32 and 33 to the clamping lever 28, thus serving to bring 'presser plate 38 into tight gripping relation with the top of the work stock. When this gripping relation has been established, eccentric I8 is then operative to drive knife 22 downwardly into the stock, thus effecting the required bevelled slash, which slash is accurately positioned on the work stock. The depth of the stroke can be controlled through adjustment of the position of knife 22 with respect to its holder 2 l this adjustment being readily effected by means of screws 24.

It will be seen that there has been provided a machine which is well suited to perform its intended functions. Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described,

and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A machine for bevel slashing rounded sole blanks comprising a base. providing a support for the blanks, a knife slidably mounted over said base for reciprocation into the blank, and gage means for fixing the position of a given blank with respect to said knife, said means comprising selectively usable right and left side gages each adapted respectively to contact two points on the same side of a right or left blank, and a toe gage, said side gages being mounted on a common sliding bar, and means for adjusting said bar laterally selectively to accommodate right or left blanks of varied sizes.

2. A machine for bevel slashing rounded sole blanks comprising a base providing a support for the blanks, a knife slidably mounted over said base for reciprocation into the blank, and gage means for fixing the position of a given blank with respect to said knife, said means comprising selectively usable right and left side gages each adapted respectively to contact two points on the same, side of a right or left blank, and a toe gage, said side gages being mounted on a common sliding bar, and means for adjusting said bar laterally and said toe gage longitudinally selectively to accommodate right or left blanks of varied sizes.

3. A machine of the class described comprising a base providing a support for work stock, a work clamp mounted over said base and having an inclined guideway, a knife slidably mounted in said guideway in position to enter said stock, a drive shaft, means operated by said shaft for increasing pressure between said clamp and work positioned therebeneath, and connections between said shaft and knife for operating the latter.

4. A machine of the class described, comprising a base providing a support for work stock, a work clamp having one end pivoted to said base and its other end overhanging said stock, a knife mounted over said base in position to enter said stock, a compression spring seat on said clamp, a drive shaft, a cam fixed to said shaft in position to bear on said spring to transmit cushioned pressure from said shaft to said clamp.

5. A machine of the class described, comprising a base providing a support for work stock, a work clamp having one end pivoted to said base and its other end overhanging said stock, a knife slidably mounted on the overhanging end of said clamp in position to enter said stock, means for pressing said clamp toward said support, and means for driving said knife.

6. A machine of the class described, comprising a base providing a support for work stock, a work clamp having one end pivoted to said base and its other end overhanging said stock, a knife slidably mounted on the overhanging end of said clamp in position to enter said stock, a drive shaft having a plurality of eccentric cams, spring cushioned connections between one of said cams and said clamp, and a pitman pivotally connecting another of said cams with said knife.

'7. A machine for bevel slashing rounded sole blanks comprising a base providing a support for a blank, a work clamp having one end pivoted to said base and its other end overhanging said blank, a knife slidably mounted on the overhanging end of said clamp in position to enter said stock, a drive shaft, connections driven by said shaft for pressing said clamp against and for driving said knife into said blank, a constantly rotating driving pulley, a driving connection between said pulley and shaft, and means for automatically disengaging said driving connection at the completion of one operating cycle of said knife and clamp.

8. A machine for bevel slashing rounded sole blanks comprising a base providing a support for said blank, a work clamp having one end pivoted to said base and its other end overhanging said blank, a knife slidably mounted on the overhanging end of said clamp in position to enter said blank, a drive shaft having a plurality of eccentric cams, spring cushioned connections between one of said cams and said clamp, a pitman pivotally connecting another of said cams with said knife, a constantly rotating drive pulley, a driving connection between said pulley and shaft, and means for automatically disengaging said driving connection at the end of one shaft rotation.

JOHN FREDERICK SMITH.

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