US2034740A

US2034740A - Fastener turning machine

Info

Publication number: US2034740A
Application number: US619707A
Authority: US
Inventors: Francis L Brandt
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1932-06-28
Filing date: 1932-06-28
Publication date: 1936-03-24
Anticipated expiration: 1953-03-24

Description

arch 24, 1936. F 1 l BRANDT FASTENER TURNING MACHINE Filed June 23, 1932 2 Sheets-Sheet l ,106, /VENTU/Q:

L92 ML f l" BVV.; G i

March 24, 1936. F; L BRANDT 2,034,740

FASTENER TURNING MACHINE Filed June 23, 1932 2 Sheets-Sheet 2 122 NVE/WUR.- 7/4 124 Patented Mar. 24, 1936 I unirse sra'rss PATENT orties FASTENER TURNING MACHINE Francis L. Brandt, Wakefield, Mass., assigner to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application June 28, 1932, Serial No. 619,707

14 Claims. (Cl. 81-54) This invention relates to machines for turn- Fig. 2 is an enlarged view in side elevation ing fasteners and is illustrated herein as empartly in section of the last, shoe and heel clampbodied in a machine particularly adapted for use ing means;

in attaching heels to shoes. Fig. 3 is a sectional View of the mechanism for In the practice of a method disclosed in United actuating the screw fastener; 5 States Letters Patent No. 1,615,258, granted Jan- Fig. 4 is a front elevation corresponding to uary 25, 1927 on application of Maurice V. Bres- Fig. 2; I nahan, a lasted shoe and a heel are clamped in Fig. 5 is a view in front elevation of the treadle assembled relation, and a screw fastener is inmechanism for operating the shoe and heel serted through a hole in the last through the clamping means; 1o

shoe bottom and into the heel to secure the Fig. 6 is a bottom View of the chuck for inheel to the heel-seat of the shoe during the setserting. the screw fastener; and ting of an adhesive which has been applied be- Fig. 7 is an enlarged detailed view of the screw tween the heel and the shoe. The screw fastener fastener to be applied.

may have a nut threaded upon its shank to be 'Ihe illustrated machine comprises a table I0 l5 turned down into engagement with the top of and a standard I2 mounted on a base I 4. The the last after the screw is driven into the heel table I0 is provided with means including a tread to complete the clamping action. plate or work support I6 and a clamping bar In view of the foregoing, my improved fastener I8 for respectively supporting a lasted shoe I'I 2o turning machine combines with a tool for opand holding aheel I9 in place thereon during the 20 erating upon a fastener, such a power member operation of inserting a fastener through the as a shaft and means connected to the tool and heel-seat into the heel. The standard I2 carshaft and constructed and arranged to turn the ries a fastener inserting or driving tool together fastener by stored kinetic energy, the Connecwith an electric motor 22 for actuating said tool.

tion between the shaft and means being incapable 'I'he tread plate I 6 is shaped to engage the 25 of transmitting sufficient force to drive the fastread face of the forepart of the sole of the shoe tener. This allows the driving force to become I 1 and is provided with a pad 24 of rubber or ineifective when a denite resistance is encounother yieldable material which engages the tread tered, independently of the source of power from face of the heel I9. The tread plate is mounted which the shaft is rotated. In one aspect of for angular adjustment to position correctly for 30 the invention, the machine is organized to turn co-operation with heels of different heights the a plurality of fasteners together initially and shoe witha contained last L. Througha vertical then to permit the rotation of a predetermined bore in the cone of the last a screw fastener 26 one of the fasteners to be stopped while that of passes to clamp the heel and the shoe in assem- 55 another continues. This may be applied to the bled relation. For its adjustment, the plate is 35 simultaneous rotation of the previously menpivoted for vertical oscillation to a bracket 28 tioned screw and the nut thereon, this being folby a pin 30, the bracket being adjustably mountlowed by the completion of the turning of said ed on the table I0 by a post 32. This post is nut. In this case both of these fasteners may be secured to the bracket by a set screw 34 and is driven in the manner above indicated, there being maintained adjustably in a depending portion of 40 an energy storing member for each of these fasthe table by another set screw 36. Mounted beteners. One of such members may be rotated low the pin 3IJ in the bracket 28 is a shaft 38 which from the power shaft through frictional conneccarries an eccentric toothed segment 40 secured tions. In the present instance, the rotation o-f to the shaft 38 by a set screw 42. The bottom of the other member is produced in a like manner by the plate I6 is provided with a downwardly ex- 45 connection to the member just mentioned. tending lug 44 having a, hole to receive a pawl The Work support and clamp disclosed herein 46. The pawl is arranged to engage the eccentric is made the subject of the divisional application toothed periphery of the segment 40 to maintain filed August 3, 1934, Serial No. 738,304. the plate I6 in adjusted position, as will herein- The invention will be best understood from a after be more particularly described. 50 description of a particular embodiment thereof The forward end of the plate or support I6, illustrated in the accompanying drawings, in that is, the end nearest the operator, is provided which, with a slot 48 in which a gage 50 is mounted for Fig. 1 is a view in side elevation of a machine adjustably determining the position of the heel illustrating one embodiment of the invention; I9, and consequently the top of the last cone, 55

relatively to the clamping bar I8. The gage is secured to the upper extremity of a screw 58 threaded vertically through a supporting member 54 arranged to slide in the slot d8. By turning the gage, and thus shifting it with the screw up or down, its height may be varied and consequently the distance from the heel-seat end of the heel to be clamped of the area with which the gage contacts. This provides for leaving a space at which the operator may grasp the heel while introducing the work into the apparatus. Also movable in the slot 48, outside the member 54 and independently thereof, is a gage positioning slide block 52 through which is threaded horizontally a screw 55 having an end portion entering an opening in the supporting member for engagement with a flattened side of the screw 58. When the work is clamped by the bar I8 and the inner supporting member is thereby forced back toward the positioning block, this engagement between the screws 58 and 55 locks the former and the gage 50 in their adjusted positions for each complete rotation of the screw 58 and also alters the heel locating position of the support 54. The block 52 is joined by a link 66 to the segment 40; so by moving the block in the slot the segment may be turned about the axis of the shaft 38. The eccentricity or contour of the toothed edge of the segment is such that, to whatever angle the plate I6 may be turned about the axis of the pin 30 to present correctly the fastener hole in the last to the tools which are to operate upon the fastener, a corresponding relation will be established between the gage 55 and the clamping bar I8, so when the work is positioned with a heel against the gage said bar will engage the end of the last cone to bring the direction of application of the clamping force properly within the heel-seat, yet clear of the fastener hole. This locating of the gage is effected when movement of the slide 52, acting through the link 65, turns the segment to its retaining position with a space between adjacent teeth receiving the plate projection 48. To adjust the gage horizontally so the engagement of the bar I8 will be correct for different lasts and different types and heights of heels, the screw 55 is turned, this furnishing a variable stop for the outward operating position of the support 54. Separation of the support from the block by inward movement along the slot 48 frees the screw 58 from the screw 56, so the former with the gage which it carries may be vertically adjusted. When the operator wishes to change the angie of the plate I5 to arrange for operation upon a dierent height of heel, one of said heels held upon the heel-seat of a shoe is placed upon the yieldable pad 24 of the plate with its rear wall against the gage 58. Then the plate is lifted, for example by the screw 56, so the pawl 46 leaves the notch which it has engaged in the segment 48. By moving the slides 52 and 55 the link 56 may be caused to turn the segment until it is fully clear of the pawl for the various angles which the plate may assume. The plate may thereupon be adjusted to the desired angular relation, or so the last bore which receives the fastener 26 is approximately vertical, then the operator again moves the slide to bring the segment into retaining engagement with the pawl. This automatically so locates the gage 58, and thereby the heel with the lasted shoe held against it, that the end of the last cone will receive contact of. the clamping bar I8 well within its edge, yet clear of the last kbore and the tools which are to operate in connection with it. Or the locating steps may be taken, in part, reversely. That is, when a. change of the heel height occurs and with the work in place as before, the operator, after freeing the segment 48 by lifting the plate I, may move the

slides

52 and 54 until the top of the last cone is in the desired relation to the bar I8. Then, on dropping the plate, the segment will have been so positioned through the link 65 that when the pawl enters between two segment teeth said plate will be fixed at the desired angle. 'Ihe heel engaging surface of the gage 50 is provided with a felt pad or any other soft covering 60 to prevent injury to the heel cover. A plate 62 is secured to the supporting member 54 and carries the rubber pad 24 above referred to. The pad 24 engages the tread face of the heel I9, and when the shoe I'I is clamped to the supporting plate I8 by the bar I8 the heel I9 will move downwardly and press against the felt surface 68 of the gage 50. This not only holds the heel I9 n rmly against lateral displacement, but also wedges it forward against the breast cut in the sole.

The clamping bar I8 is located above the table I8 and is mounted for movement toward and from the tread plate I5 to clamp against it the lasted shoe il and the heel I9 in assembled relation. The clamping bar I8 is adapted to engage and apply this pressure to the cone of the last upon which the shoe is mounted and for this purpose is provided centrally of its length with an eccentric serrated contact portion 68 rotatable on the bar through a limited angle. As the portion 68 tends to turn under the influence of the clamping force, it becomes effective to urge the breast cut in the shoe sole against the heel and said heel against the gage 5B. A pair of links 10, 'I2 are offset toward the toe end of the tread plate I6 to allow the greatest amount of space for the operator in positioning the shoe within the clamp, and these links carry the clamping bar I8 at their upper extremities. Between their ends the links are pivoted at 'I4 to arms I6 of a U-shaped bracket mounted in a hollow bearing member 'I8 surrounding the post 32. At their lower ends the links 18, 'I2 are secured to arms 88 of a yoke 82 (Fig. 5) which is pivotally mounted on a spindle 84 (Fig. l) carried by a bracket 86 secured to the lower extremity of a sleeve 88 depending from the table. It will be observed that the arms 8i! are substantially longer than the arms 18. By this arrangement whenever the links and clamping bar are moved upwardly by the arms 8U, said links are also rocked about the connections 'It with the arms 'I6 to carry the clamping bar toward the toe end of the shoe II to an inoperative position, in which the bar will not interfere with the operator in placing a shoe within the clamp or removing one therefrom. The upward and inward or inoperative position of the bar I8 is adjustably determined by a threaded stop 89 which engages an abutment 90 formed on the bracket 86.

The links lil, 'I2 are rocked to operate the abovedescribed clamping mechanism by yielding adjustable connections from a treadle 92. A coiled spring 94 extends between the treadle and the yoke 82. The upper end of the spring is secured to a rod 98 between the arms 80 of the yoke and its lower end to a member 98 having a slot through which extends a pin Iill'l secured to the treadle. The lower end of the slotted member 98 is provided with an adjusting screw |02 by which the tension of the spring 94 may be adjusted. At-

tached to the rod 96 is a treadle rod |04 which is provided with an open slot in its lower end for the reception of the pin on the treadle 92. Mounted on said treadle 92 is a locking treadle |06 which carries a pawl |08 arranged to engage a stationary rack IIO when the clamping bar I I8 is in operating position. A spring I I2 secured to the treadle |06 and to a cross bar mounted in the machine frame or base I4 serves to hold the pawl I 08 in engagement with the teeth on the rack and after clamping pressure has been released to return the clamping bar to its inactive position.

When the operator depresses the treadle 92 the clamping bar I 8, through the arms 80 of the yoke 82 and the

links

10, 12, is rocked toward the cone of the last by the spring 94, and when the treadle 92 has been depressed a distance suicient to obtain the necessary pressure, the pawl |08 engages the teeth on the rack to maintain the bar in its clamping relation. It should be understood, however, that under some conditions the operator may prefer not to lock the clamping devices in operative position but to stand on the treadle until the operation to be performed on the shoe has been completed. After such operation has been performed as by the tool 20, the operator depresses the treadle 92 slightly and then the treadle |06 to disengage the pawl. Both treadles are thereupon moved upwardly under the influence of the spring 94 until the pin |00 strikes the end of the slot in the rod |04. At this time the paw] has passed beyond the teeth on the rack and the treadle 92 and the clamping bar I8 connected thereto are swung into inactive position by the spring |I2.

Referring now to Fig. 7, it will be noted that the forward end of the fastener 26 is fluted or slabbed off topermit said fastener to be inserted without the necessity of first forming a hole for its reception in a work piece. In other words the fastener acts as a drill to form a hole in the heel I9. The other end of the fastener is provided with an elongated head ||4 by which it can be turned into the work. Immediately below the head, the shank of the fastener is threaded to receive a clamping nut. The nut III is provided with a collar I|8 on which is mounted a conical washer |20. The purpose and operation of the parts of the screw fastener will be more clearly understood when the mechanism for its insertion has been described.

The inserting mechanism 20 will now be considered. This comprises a screw driver |22 and a wrench |24. These are provided with a telescopic driving connection which includes a universal joint |28` connected to the armature shaft of the motor 22 and to a sleeve |28 which is provided with diametrically opposed slots |30 extending lengthwise of the sleeve. A shaft |32 is arranged for longitudinal sliding movement in the sleeve |28 and is provided with a key |34 which fits into the openings |30. The lower end |35 of the shaft |32 is ball shaped and acts through connections to rotate the fastener inserting mechanism 20.

This mechanism 20 is supported in a frame |38 which, as is shown best in Fig. l, is in the form of a yoke having a downwardly extending portion |40 shaped to form a convenient hollow handle by which the operator may move the tool to operating position. The handle portion |40 is hollow and in this the driving connections for the wrench and the screw driver are concentrically rotatable. The frame I 38 is supported in inactive position by a member comprising a yoke |42 pivoted to the upper end of the yoke I 38. Secured to the rear end of the yoke |42 is a link |44, which is pivoted toa lever |46 fulcrumed in an opening in the standard I2. The lever is normally maintained in the position shown in Fig. 1 by a spring |48 attached at one end to said lever and at its other end to the table |0. By this construction the fastener inserting mechanism is so positioned that it does not interfere with the actions of the operator in placing work on the support I2 or in removing work therefrom but permits the fastener inserting mechanism readily to be moved to operating position.

The wrench |24 is directly connected to a shell |50 by a sleeve |5I which rotates in bearings |53 and |55 formed in the handle |40. 'Ihe upper end of the shell |50 is closed by a screw cover |52 provided with a downwardly extending portion |54 into which is fitted a member Iiii;` having a conical hole formed therein and which furnishes one part of the socket for the ball shaped end |35 of the shaft |32. The upper portion of the cover |52 is tted to receive a screw cap |53. Co-operating with the member |56 is a washer |50 which has a. conical hole and furnishes the other portion of the socket for the end of the shaft |32. The washer |00 is held .against the ball I 36 by a spring |62, the expansive force of which may be adjusted by screwing the cap |53 into the cover |52. The pressure of the washer against the ball |36 is normally very light, so the rotation of the wrench |24 may be stopped without putting undue load on the motor. The shell |50, rotating under the momentum acquired when the machine is idling, will operate through the wrench |24 to turn the nut I I6 until'the desired clamping pressure has been attained.

Mounted inside of the shell |50 is a cylindrical block or member |64 of substantial weight. For present purposes I have found approximately six pounds to be correct. The block is of substantially the same diameter as the inside of the shell |50 but is not so high, this permitting these elements to have a relative axial movement. Depending from the block |04 is a shaft |60 to the lower end of which the screw driver |22 is secured.

When the tool is brought into engagement with the screw fastener 26, the head I I4 is received by a socket |18 at the lower end of the screw driver |22 and the nut I IB enters an hexagonal recess in the lower end cf the wrench |24. During the initial driving movement, the wrench and screw driver rotate as a unit. The block |64, due to its relatively large mass, has acquired an amount of kinetic energy sufficient to drive the slabbed-off end of the screw into the wood heel. The nut descends with the screw under the inuence of the shell |50. When the resistance to the screw becomes suflicient to stop the rotation of the member |64, the wrench |24 continues rotating to turn the nut, thereby bringing the nut and washer against the top of the last to clamp the heel to the shoe. During this rotating downward movement of the wrench, the shaft |66 and the screw driver |22 are stopped, so the friction drive |68 is disconnected and the shell |50 is free to rotate independently. The shell, however, has a relatively small mass and its' kinetic energy is not so great as that of the member |64. It is, however, sufficient to turn the nut I I6 against the top of the last to produce the desired clamping pressure between the heel and the shoe. Thus, there is established a predetermined relation between the times of setting of the two fasteners and the amount of force applied thereto.

Although the parts of the machine have been described in detail it may be well to summarize briefly the operation of the machine. The operator will adjust the tread plate I6 and the gage U to the desired positions to accommodate heels of different heights and shoes of different shapes. When the tread plate has been properly adjusted for the particular shoe to be operated upon, the operator places a heel I9 on the yielding pad 24 and a shoe on the tread plate with the heel seat of the shoe engaging the top surface of the heel. Clamping pressure is then applied through the bar i8 to maintain the parts temporarily in assembled relation. The contact portion 68 of the clamping bar, because of its eccentricity, acts to move the shoe rearwardly and downwardly, thereby securely wedging or clamping the heel IQ against the pad 5B of the gage 5|). With the parts of the machine in this position the operator grasps the handle |40 and moves the tool 2li into engagement with the screw fastener 2t, which he has placed in the bore of the last, and said fastener is driven into the heel until the resistance is sufficient to stop the rotation of the member |64. The screw will therefore have entered the heel to a substantially definite distance, The wrench |24 continues its operation to turn the nut ||5 against the top of the last. The operator then releases the tool 20, which returns to the position shown in Fig. 1, frees the shoe from the clamping pressure and removes it from the machine, which is now ready for the succeeding operation.

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

l. In a fastener driving device, a rotating power shaft, an operating tool, means rotated by said shaft and connected to said tool constructed and arranged to drive home a fastener by kinetic energy stored in said means, and a driving connection between the shaft and said means which is incapable of transmitting sufficient force to drive said fastener.

2. In a screw and nut driving device, a rotating power shaft, a screw driver, a wrench, means rotated by said shaft and connected to said wrench and screw driver constructed and arranged to drive home a screw and a nut on the screw by kinetic energy stored in said means, and a driving connection between the shaft and said means which is incapable of transmitting sufficient force to drive said screw and nut.

3. In a screw driving device, a rotating power shaft, a screw driver, means rotated by said shaft and connected to said screw driver constructed and arranged to drive home a screw by kinetic energy stored in said means, and a driving connection between the shaft and said means which is incapable of transmitting suicient force to drive said screw.

4. In a screw and nut driving device, a rotating power shaft, a screw driver, a wrench, a pair of members rotatable by said power shaft and connected to the screw driver and wrench respectively, said members having sufficient kinetic energy imparted thereto by the power shaft to produce the driving effect independently of said power shaft, and. a connection between said members permitting operation of the screw driver during the operation of the wrench.

5. In a screw and nut driving device, a hollow handle, a wrench mounted to rotate in the handle, a screw driver mounted to rotate within the wrench, a power driven shaft, and a pair of members connecting the screw driver and the wrench respectively to the shaft, said members each having mass suicient to store kinetic energy enough to drive home respectively a screw and a nut on said screw.

6. A screw and nut drivingdevice having, in combination, a rotating power shaft, a hollow handle, a screw driver, a wrench, a member having relatively small mass connected to said wrench and to said shaft, and a second member having relatively large mass and supported by the rst-mentioned member and connected toA said screw driver whereby kinetic energy stored in said members is utilized to drive home a screw and to drive a nut on said screw with less force than that by which the screw is driven.

7. In a screw and nut driving device, a rotating power shaft, a -screw driver and a wrench concentric with each other, a shell connected to the wrench, a relatively heavy member mounted within the shell and having the screw driver connected thereto, friction means connected to said shaft and to said shell to impart rotation to said shell and to the member secured to the screw driver, and means connecting said shell and said member constructed and arranged to permit operation of the screw driver to cease while permitting operation of the wrench to continue under momentum imparted thereto by the shaft.

8. A screw and nut driving device having, in combination, aV screw driver and a wrench concentric with each other, a support for the screw driver and the wrench, a rotating power shaft, a shell mounted for rotation in said support and connected to said wrench, a member mounted within said shell and connected to said screw driver, friction means interposed between said shell and said member to permit rotation of the shell to be imparted to said member, and means connecting said shell to said shaft for rotating said shell and said member to impart sufficient kinetic energy thereto to drive home a screw and a nut on said screw after said member has been disconnected from the last-mentioned means.

9. A screw and nut driving device having, in combination, a screw driver and a wrench concentric with each other, a support for the screw driver and the wrench, a rotating power shaft, a shell mounted for rotation in said support and connected to saidV wrench, a member arranged to move axially in said shell and connected to said screw driver, friction means interposed between said shell and said member to permit rotation of the shell to be imparted to said member, and means connecting said shell to said shaft for rotating said shell and said member to impart sufficient kinetic energy thereto to drive home a screw and a nut on said screw.

10. A screw and nut driving device having, in combination, a screw driver and a wrench concentric with each other, a support for the screw driver and the wrench, a rotating power shaft, a shell having a. relatively small mass mounted for rotation in said support and connected to said wrench, a member having relatively large mass mounted within said shell and connected to said screw driver, and means connecting said shell to said shaft for rapidly rotating said shell and said member to impart sufcient kinetic energy thereto to drive home a screw and a nut on said screw with less force than that by which the screw is driven.

1l. A screw and nut driving device having, in combination, a screw driver and a wrench concentric with each other, a support for the screw driver and the wrench, a rotating power shaft, a shell mounted for rotation in said support and connected to said wrench, a member arranged to move axially in said shell and connected to said screw driver, means connecting said shell to said shaft for rapidly rotating said shell and said meme ber to impart sufficient kinetic energy thereto to drive home a screw and a nut on said screw, and friction means interposed between said shell and said member to cause rotation of the shell to be imparted to said member and the screw driver and the wrench to rotate together during the driving of the screw, while permitting axial movement of the member carrying the screw driver to disconnect the member from the shell and allow rotation of the wrench to continue to turn the nut.

12. In a screw and nut driving mechanism, a rotatable power shaft, a screw engaging member,

a nut engaging member, operating connections including friction means for applying the power of the shaft to rotate one of the engaging members, and operating connections including friction means for communicating the rotation of the thus rotated member to the other member.

13. In a screw and nut driving mechanism, a rotatable power shaft, a screw engaging member, a nut engaging member, operating connections including friction means for applying the power of the shaft to rotate one of the engaging members, and operating connections including friction means for communicating the rotation of the thus rotated member to the other member, the mass of the connections for one of the members being great as compared with that of the connections for the other member.

14. In a screw and nut driving mechanism, a rotatable power shaft, a screw engaging member, a nut engaging member, operating connections including friction means for applying the power of the shaft to rotate one of the engaging members, operating connections including friction means for communicating the rotation of the thus rotated member to the other member, and means arranged to vary the amount of power transmitted by one of the friction means.

FRANCIS L. BRANDT.