US1461785A - Work support - Google Patents

Description

J. H. POPE WORK SUPPORT.

Filed Nov 24", 1919 /A vE/v mm f zz ttl bl n srna rnr'r time ,rosnrn H. POPE, on nAr/rrmon, rnsseonusnrrs, Assrenon rro onrrnn snon MA- cHrnEnY conrone'rron, or rernnson, new JERSEY, .e ooaronn'rron or new WORK SUPPORT.

Application filed November 24, 1919. Serial No. 3%,116.

To all whom it irm-y concern:

Be it known that l, Josnrrr H. Porn, a citizen of the United States, residing at Hamilton, in the county of Essex and satate of Massachusetts, have invented certain Improvements in \Vork Supports, 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 work supports for shoe machinery and, more particularly, to a work support for facilitating the proper location of a shoe with respect to the operating instrumentalities of the machine and maintaii'iing the shoe its proper position while being operated upon.

For example, in heeling machines, as well as in other shoe machinery. it is customary to provide a shoe support in the form of a jack which is arranged to slide from a work receiving position in front of the machine into a position in operative relation to the tools which are to operate upon the work. Usually, such a jack slides freely in and out and the friction of the jack base in its guideway is depended upon to retain the jack in position when pressure. is exerted upon the work. It is often found, however, especially when the faces of the work are not parallel, that the application of pressure has a considerable tendency to displace the work support or as it is termed in shop language, to causeit to kick out.

One object of the present invention is to produce a shoe support by which this undesirable tendency is overcome. In pursuance of this object, one principal feature of the invention. resides in the combination with a shoe support which is normally freely movable in a substantially horizontal guideway, of means acting upon the surface of the guideway to lock the shoe support against movement at a predetermined period in the operationof the machine. The construction and arrangement are preferably such that the locking means is contained within the slidable shoe support or ack' and is controlled in its locking function by the presence or absence of pressure upon the work; thus when the jack is moved into the rangeof the pressure applying mechanism,

it may be automaticallylocked against displacement by the application of the pressure to the work, without the exertion of any effort on the part of the operative.

An advantageous feature of such an or ganization as that above outlined is that, since the locking mechanism is self-contained within the jack and mayoperate upon the surface of the guideway without any modification of the latter, the invention may readily be utilized in connection with existing machines already in use in shoe factories, it being only necessary to substitute for the older type of jack an improved jack constructed according to the invention.

One form of the invention which has proved satisfactory in practical use comprises-a plunger slidably mounted in the jack post and arranged to operate through a toggle to project oppositely movablelock- 111g members from the jack base into engagement with the guideway in which the jack moves.

Another difficulty which has been encountered with more or less frequency in heeling or otherwise operating upon shoes mounted upon wooden lasts arises from the fact that, after such a last has been used for some time, its top or crown is frequently more or less broken down upon one side or the other and consequently does not afford a firm support for the work when placed upon the ordinary fiat jack top. With the object in view of overcoming this difficulty, another feature of the. present inventionconsists in a jack or work support having mounted.

upon it reversible last. engaging member having a last engaging face inclined transversely of the last. By reversing'the last engagingmember, the said face may be inclined in one direction or the other .as may be required to afford suitable support for lasts having. their tops broken down on either side. The last engaging member may also be mounted in such a way as to permit a limited amount of free lateral movement with respect to the jack post, thus making it easy to adjust the shoe to wthe'exact position desiredwithrespect to the instrumentalities which are .to operate upon it.

Other features of improvement and advantages of the invention yvill become apparent upon reading the following detailed description of one embodiment thereof in connection with the accompanying drawings, in.which- Figure 1 1s a view in side elevation of a portion of a well-knowntype of heeling machine having a work support embodying the invention applied thereto;

Fig. 2 is a front elevation of the work support with portions shown in section on the line 22 of Fig. 1, to disclose the construction of the locking mechanism;

Fig. 3 a detail view of the jack top with a wooden last upon it; and

Fig. 4 is a detail view showing the last engaging member separated from the jack a heavy, positive pressure is applied by any suitable means such, for example, as a cam 14, prior'to the driving of the heel at-taching nails by reciprocating the nail drlvers I 16. The usualbracket 18, which is raised and lowered by the pressure mechanism, is

provided with a guideway comprising undercut surfaces'20 in which a jack baseof "dovetail formation is fitted to slide'easily.

The general shape of the'jack base is shown at 22, and extending upwardly from it is a sleeve 24 in which is loosely mounted a jack post 26. The ack post 26 is threaded and a large manually operated nut 28 serves to effect vertical adjustment to vary the height of the jack. A jack top 30 is p votally'mounted at the top of the post 26 for the purpose and in the manner described in detail in Patent No. 1,313,909. r

A plunger 32 has a vertical sliding bearing in the sleeve 24 andis supported by a spring 34 bearing upon the lower face of a nut 36 adjustably threaded upon the upper end of the plunger. The upward movement of the plunger is limited by an enlargement 38 at its lower end wh ch engages a. corresponding shoulder formed within the sleeve 24. The arrangement and normal adjustment of the plunger and nut 36 are 1 such that 'the nut 36 projects slightly above 55 the top of the sleeve 24 and the jack post adjusting nut 28 rests upon the nut 36. A toggle comprising links 40, pivoted together at 42. is arranged to be operated by a' secondary plunger 44, provided with a stem 46, which telescopes into a recess 48 in the lower end of the plunger'32. A pin and slot connection 50, between the stem 46 and the plunger 32, serves to limit the relative movement between the two, and a compression spring 52 interposed between the members 38 and 44 permits a certain'amount of yield ing when the member 44 is pressed downwardly, by depressing the plunger 32.

Oppositely disposed locking members 54 are arranged to slide horizontally in suitable guides formed in the base 22 and arerespectively pivotally connected to thefllnks' 40 of the toggle, by which they areprojected and retracted. The ends of the members 54 are inclined, to correspond to the surfaces 20, and the arrangement is such that when the said members 54 are projected outwardly they will engage securely with the surfaces of the jack guideway and lock the jack firmly against sliding movement theremally projects the upper end of the plunger 32, or the nut 36, slightly above the top of the jack member 24 and supports the jack post 26 and associated parts with the hand As previously stated, the spring 34 nornut 28 slightly above the top of the member 24. The shoe is jacked with the work support drawn forward and occupying the position illustrated in Fig. 1, after which the work support, with the work upon it, is pushed into operative position with the heel seat of the shoe beneath the heel 56, which is held in a suitable holder 58 upon the under side of the nailing die 10. The work support is then raised to apply pressure to the work. In this upward movement of'the work support the shoe first engages the heel and then the reaction causes relative approaching movement of the nut 28 and the upper end of the sleeve 24, the spring 34 yielding and permitting the plunger 32 to be depressed by the nut28. The depression of the plunger 32 is yieldingly transmitted through the spring 52 to the second ary plunger 44 which, in turn, tends to straighten the toggle 40 and project the locking members 54 into locking engagement with the work support guideway. The work support is thus securely held against displacement as long as the work is under pressure but isinstantly released as soon as the pressure is removed. It will beapparent that theoperation of the locking mechanism is entirely automatic, being controlled by the presence or absence 0 pressure upon the work and requiring no attention whatever on the part of the operative.

The upper face of the jack top 30 is provided with a transverse undercut slot 60, being in this respect substantially the same as the corresponding member in the jack shown a 62 is provided upon its under side with a circular dovetail 64 eta diameter to -lit in theundercut slot 60. "Springpressed plugs 66 having rounded upper ends are so mounted in the member 30. that their ends nor mally pro ect above thetop'surface thereof forced transversely into or out of position but the plugs acting as detents to retain the last engaging member andprevent it from becoming accidentally separated from the ja'cl'rt'op. The purpose of elongating the rece'ss 68 is to permit alimited amount of free transverse movement of the last engaging member, thus inaking'it easy to adjust the shoe to the exact position desired.

The upper face 70 of the" 1 st engaging member 62 is transverselyinclined, as shown in Figs 2 and 3, and, as illustrated, isiprovided witha projeeting last pin 72 and side wings 74.. i A last '26 isshownin Fig. 3. which has its top or crown broken down or worn away more upon one side than the other; the inclination of the face 70 of tl'ie last engaging member compensates for the transverse inclination ofthe general top surface of the last which is,therefore, solidly sup ported with its bottom face 78 substantially horizontal, which is necessary for the proper engagement of the parts of the work when they are brought together. If the inclination of the top face of the last, due to unequal wear, or breaking down. should be in the opposite direction, the last engaging member 62 may be instantly reversed and the inclination of the face 70 presented in the opposite direction by rotating the member about the vertical axis of the circular dovetail 64:. It will thus be seen that provision is made for taking care instantly of worn lasts, irrespective of which side is worn away. The improved last bed piece may,

furthermore, be removed by a single motion of the hand and the regular flat bed piece inserted for use in connection with lasts which are not broken down nor unevenly worn.

Having thus described my invention.what I claim as new and desire to secure by Letters Patent of the United States is 1. In a machine of the class described, the combination of a shoe support, a guide in which said shoe support is normally freely movable substantially horizontallyin a right line, and means acting upon the guiding surface to lock the support againstmove- 5. A work support, applicable shoe machines having an undercut worksupcombination of; mechanism for applying pressure to the work, a werk support normally freely movable into and out of the range of the pressureapplying mechanism, and means controlled by the presence or absence of pressure upon the work for locking the work support against movement.

In a machine of the class described, the combination of mechanism for applying pressure to the work, a ack, means for gu ding the ack for movement into and out oftherange ofthe pressure applying mechanism, and means contained withm the ]&Cl

{merit at a predetermined period in the operat-ion of the machine. Y: r I

2. In a machine of the class describechthe for locking it against movement when the pressure is applied.

4i. A work support, applicable to shoe machines having a rectilinear guideway, comprising abase having rectilinear surfaces to co-operate wlth such a guideway, and means operable by pressure uponthe Work support forlockingthe base thereof to'said guideway. 7 r

to ex sting port guideway, comprising a base having surfaces arranged for'sliding engagement withsuch a, guideway and means contained within said base for engaging asurface of the guideway andlocking the work support against movement when pressure is applied to the work.

6. A ack, "applicable to shoe machines having a jack guideway, comprising a base constructed and arranged to be guided for movement in such a guideway, a plunger slidably mounted in the base, and toggle operated means operatively connected to the plunger for locking the jack to the guideway.

7. Locking mechanism for the jack of a shoe machine comprising a guideway, a jack having a base constructed and arranged to slide in said guidew-ay, a locking member in the jack base movable into locking engagement with the guideway, atoggle connected to said locking member, and means for straightening the toggle to operate the locking member. 7

8. Locking mechanism for the jack of a shoe machine comprising a guideway, a ack.

having a base constructed and arranged to slide 1n sald guideway, oppositely directed locking members in the jack base movable outwardly into locking engagement with the guideway, a tog le connecting said locking Pr: members, and means for straightening the toggle to pro]ect said locking members.

9. In a demos of the class described, the

combination of a jack post, a jack base in;

which said post is loosely mounted, a toggle in the base, connections between the post and the toggle for straightening the toggle when the post is depressed, and locking memvice for engaging the top. or crown of a last, said member having a last engaging face inclined transversely of the last and be ing reversible to reverse the inclination, of

saidiace relatively to the last. I 12. In a work support, the combinatlon of a jacl; post, a last engaging member loosely mounted thereon for a limited amount of lateral movementrelative thereto, said member being capable also of reversal relative to the jack post and means for temporarily .maintaining one or the other of the reversed positions while permitting the lateral movement.

13. In a work support, the combination of a jackpost, a last engaging member loosely mounted thereon and detentmeans co-operating with saidmember normally to permit a limited amount of lateral movement thereof relative to the jack post, said detent means being retractable to permit a complete reversal of said member relative to the jack post.

14. In a Work-support, the combination of a substantially vertical jack post, a last engaging member having a transversely in clined last engaging face loosely mounted thereon, and detent means normally retaining said member upon the post, said detent means being retractable to permit reversal of the last engaging member in a substantially horizontal plane to reverse the inclination of said face.

15. In a work support, the combination last engaging face in reversed positions.

16. In a machine of the class described, a shoe support, a guideupon which the support may move, a member movable with the support for locking said support against movement upon the guide, a lever connected to the locking member, and means for moving the lever to operatesaid lockingmember.

17.,In a machine of the class described, a shoe support, a guide upon which the support may move, a member for locking the support against movement upon the guide, a lever connectedto the locking member, and means controlled in movement of the work for moving the lever to operate said locking member. I y

In testimony whereof I have signed my name to this specification.

JOSEPH H. POPE;

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