US1798291A - Pulling-over machine - Google Patents

Description

PULLING-CVER MACHINE ..Filed March 27, 1929 2 Sheets-Sheet l i i 1 6 as Jnveni'or K. WOLLNY 1,798,291

PULLING-OVER MACHINE March 31, 1931.

2 Sheets-Sheet 2 Filed March 27, 1929 Patented Mar. 31, 1931 UNITED STATES PATENT OFFICE KARL WOLLNY, OF WEISSENFELS, GERMANY, ASSIGNOR TO THE FIRM NOLLESCHE WERKE KOMM."GES., OF \VEISSENFELS, GERMANY PULLING-OVER MACHINE Application filed March 27, 1929, Serial No. 350,372, and. in Germany April 3, 1928. V

This invention is intended as animprovement on the machine described in U. S. Patent No. 1,688,556 and British Patent No. 239,890. It has for its object to provide a pulling-over machine the pincers and the last-support of which may be operated by the attendant for grasping the upper and stretching it effectively over the last while all other operations of the machine are performed automatically.

To these ends the invention consists of a machine embodying those features of construction and arrangement which are illustrated in the drawings and which are now to be described in detail, and then pointed out in the claims hereto annexed.

In the drawings, Fig. 1 shows a pincer and nailing device partly in an elevation and partly in a vertical section; Figs. 2 and '3 are cross-sections along the lines AB and CD of Fig.1 respectively; Fig. 4 is an elevation of the essential parts of the machine, some parts being in section or broken away for the sake of clearness. Fig. 5 shows in a horizontal section the means for returning the nailing device into its middle position. Fig. 6 shows like means for returning the pincers into their middle position. Figs. 7 to 9 illustrate three successive positions of the last support and the pincers.

As all pincerand nailing devices are alike it will suffice to describe one device only.

The carrier 4 of the pincer-body 5 as well as the carrier 6 of the nailing device are arranged in the space 3 between the side-walls 1 and 2. On the pincer-body 5 is arranged the fixed pincer-jaw 6a and the jaw 7 pivoted on the bolt 8. This movable jaw '7 has a rearwardly bent arm 7a and can be closed by the roller 9 cooperating therewith. The roller 9 is carried by a bolt 11 of the pulling bar 10. The bar 10 is connected to the kneelever l3 by means of a ball-joint 12. The knee-lever 13 is pivoted to the bolt 15 carried 5 by two slides 14 guided in the sidewalls 1, 2. The knee-lever 13 is pivotally connected to thearm 16 which can be oscillated on the fixed bolt 17. The free end of the arm 16is connected by means of the link 18 to the pull flat spring 19 tends to open the pincers and the pressure-spring 20 serves to bring the pincers into the upper position after the pulling-over is finished. By means of the nuts 21 on the pincer-body 5 the pressure of the spring 20 and the upper position of the pincers may be adjusted.

In the carrier 4 a forked lever is pivoted on the fixed bolt 49. The ends 51 of the forked lever engage the side shoulders 52 of the pincer-body 5 so that by the downward movement of the latter the lever 50 is oscillated upon the bolt 49.

A clamping roller 53 is accommodated between the curved surface 4 of the carrier 4 and the curved surface 50' of the lever '50. The distance between these surfaces increases in the downward direction. The clamping roller 53 is pressed upwardly by the plunger 55 which encloses the spring 54. As long as the finger 56 is held down by the fixed part 57 of the machine the roller 53 does not clamp the lever 50 and the pincer-body 5 and the latter may bemoved freely up and down. But if the carrier 4 is moved inward by the parts 27, 28, 29, 30 for laying the margin of the upper on the insole the finger 56 comes out of contact with the fixed part 57. This allows the roller 53 to be pressed upwardly by the spring 54 and to become clamped between the surfaces 4, 50 and the pincer-body 5 to be locked in the lower position just occupied. When the pincer-carrier 4 swings outwardly, the finger 56 rides underneath the part 57 and is thereby pressed down so that the pincerbody '5 is again free to move vertically. The nailing body 6 has on its one side a roller 35 guided by the curved path 36 of the wall 1 against which it is pressed by the spring 37. The nailing body 6 has on its upper end a sliding stop 39. This stop is held in its outward position by the spring 47 and the set-screw 40. The nails are fed into the nailguides 48 of the stops 39 through the tubes 41 coming from the common tack feeding device. While the nailing body 6 is swinging outwardly the rearward end of the stop 89 comes into contact with the set-screw 42 so that the nail-guide 48 is held in line with the feeding tube '41. When the nailing body swings again inwardly the tacks or nails fall from the guide 48 into the bore 413 wherein the nail-driver can be moved in a vertical direction by the bar 45 in order to drive the tacks through the upper into the insole. The pincerbody 5 and the nailing-body 6 can turn about their own axis in order to adapt themselves to the curvature of the edge of the last. After the operation they return into their normal middle position. This is brought about by providing the nailing body 6 with an angular tail 44 which is turned into the middle position while entering between the fixed walls 1 and 2 as seen in Fig. 5. The pincer-body 5 has a pin 45 moved by the V- shaped notch 46 of the carrier 10 into the middle position.

The last support 72 is adjustable on the lever 73 pivoted on the bolt 74; of the lever 75. The lever 75 can be oscillated on the bolt 7 6 of the machine-frame 77. The lever 73 is provided on its free end with an adjusting screw 78 held in contact with rear end 80 of the lever 75 by the spring 79.

By means of the screw 78 the position of the support 72 may be adjusted with relation to the lever 7 5 and to the toe and side-pincers. The lever 7 5 abuts with a set-screw 81 against the machine-frame 77. By means of the set screw 81 the movement of the last support 72 may be limited or altogether omitted as described below.

The lever 7 5 is connected by the link 82 with the three-armed lever 58. The lever 58 can be oscillated on the shaft 59 and has a roller 60 engaging the notch 63 of the groove 63 of the cam-disk 62. Nhen the machine is at rest the roller 60 enters the notch 68 of the groove 63 as shown in Fig. 4:.

The lower arm of the lever 58 is equipped with an adjustable wedge-plate 64. The treadle 65 for moving the side-pincers has a roller 6? on the bolt 66. When this treadle is depressed, the roller 67 acts upon the wedge-plate 64; to swing the three-armed lever 58. The treadle 65 is connected by the link 68 to the arm 69 pivoted on the shaft 59. The arm 69 on its hand is connected by the link 18 to the arm 16 for operating the. pincers.

The position of the last support relatively to the pincers in their normal position is shown in Fig. 7. The last-support is somewhat below the engaging ends of the jaws of the toe-pincer-body 5 and the side-pincerbody 5 in order to more easily grasp the upper. At first the jaws of the toe-pincers are closed and pulled down by a treadle not shown. Then the treadle 65 is depressed for closing and pulling down of the side-pincers. A pawl 7 O cooperating with a rack 70 looks the treadle 65 in its lower position. Soon a ter the beginning of the lowering movement of ,the treadle as the side-pincers are closed and begin to move downward the roller 67 comes into contact with the wedgeplate 64 of the three-armed lever 58. At the further depression of the treadle the lever 58 swings about the shaft 59 into the position shown in dotted lines. This oscillation is transmitted by the link 82 unto the lever 7 5 which lifts the last support 72 above the upper ends of the pincers as shown in Fig. 8.

The cam disk 62 does not hinder this oscillation of the lever 58 as the roller 60 is at that time free to swing in the groove 63 until it comes in contact with the face 63 of the groove.

As mentioned the pincers are closed and pulled down by moving downward the treadle 65, the link 68, the arm 69 and the links 18. During this closin and pulling movement of the pincers, the finger 56 remains in its lower position and the clamping roller 53 is not active. The pincers can therefore be released in order to seize and stretch the upper once more before swinging inward. The pulled down pincers are moved inward to lay the margin of the stretched upper upon the insole. ll hile the pincers occupy their inner position the finger 56 is out of contact with the fixed part 57 and the roller 53 becomes active to lock the pincers in the lower position just occupied.

In the automatic operation of the machine subsequent to the manual operation the pin cers and nailing, devices are swung inwardly to lay the upper1nargin upon and to tack it to the insole, the pincers are opened while being locked in the lower position, the shoe is lifted by its support out of engagement with the pincers, and the pincers and nailing devices return in their outward initial position. This automatic operation is brought about in the following manner.

The swinging of the pincers inwardly and the laying down of the upper-margin is effected automatically by means of the parts 27-80 by a shaft to be coupled with the motor drive for one revolution. After the upper margin is laid down and tacked to the insole the projecting part 62 of the cam-disk 62 acts upon the roller 60 of the lever 58 to give to the last support 72 an additional lifting movement in order to facilitate the removal of the finished shoe out of the machine. During or after the inward swinging of the pincers the links 18 begin to return upwardly. But the pincer- bodies 5, 5 are locked by the rollers 53 and do not partake of this upward movement. The raising bars 10 allow the pincers to be opened by the springs 19 and the upper to be freed from the pincers. The freed upper is held on the insole by the nailing-body 6 which acts as a wiper. The inward movement of the pincers and nailingbodies is limited by the stop 39 abutting against the edge of the last. After the nailing has taken place the shoe is raised by the support out of the machine. The pincers return now automatically into their outward position whereby the fingers 56 come in contact with the part 57 and are pushed down to free the clamping rollers and to release the pincers so that they can return into the upper position.

Before the cam disk 62 completes its revolution the pawl 70 is disengaged from the rack 70 in the manner described in the above patents and the lever 58 is swing by the spring 71 in an anti-clockwise direction, so that the roller 60 again enters the notch 63 of the cam-groove and the last support is allowed to return into its low position. By adjusting the screw 81 the roller 60 is moved out of the notch 63 of the cam-disc and the wedgeplate 64 is moved away from the roller 67 of the treadle 65. By these means the extent of the movement imparted to the support by the treadle may be regulated.

What I claim is:

1. A pulling-over machine, having, in combination pincers for grasping and stretching the upper over a last, a lastsupport, means moved by the attendant for closing and pulling the pincers and for pressing the last into the upper by moving the support after the pincers have been closed, and automatic means for swinging the pincers across the last, for lifting the shoe after the upper-margin has been layed upon the sole of the last and for returning the last support into its initial position.

2. A pulling-over machine, having, in combination pincers for grasping and stretching the upper over a last, a last-support, a treadle depressed by the attendant for closing and pulling the pincers and for pressing the last into the upper by moving the support after the pincers have been closed, automatic means for swinging the pincers across the last, for lifting the shoe after the upper-margin has been layed upon the sole of the last and for returning the last-support into its initial position, and means for adjusting the extent of movement of the support by the treadle inclependently of the extent of movement of the treadle.

3. A pulling-over machine, having, in combination a toe-pincer and side-pincers for grasping and stretching the upper over a last, a last-support, a treadle depressed by the attendant for closing and pulling the side-pincers and for pressing the last into the upper by moving the support after the pincers have been closed, and automatic means for swinging the pincers across the last, for lifting the shoe after the upper-margin has been layed upon the sole of the last and for returning the last-support into its initial position. 7

4. A pulling-over machine, having, in combination a last support, pincer-carriers movable across the last-support, pincers movable within the carriers in a dlrection away from the said support to stretch. the upper, a clamping-roller in every carrier for locking the pincers in the stretched position, and means for opening the pincers while locked in position.

5. A pulling-over machine, having, in combination a last support, pincer-carriers movable across the last-support, pincers movable within the carriers in a direction away from the said support to stretch the upper, a clamping-roller in every carrier for locking the pincers in the stretched position, means.

KARL woLLNY.

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