DE1932411A1 - Device for the automatic attachment of screws, nuts and the like. - Google Patents

Description

Kemp & Korn

K δ In-Linden thai

ttadtwQldgürt ·! 20-22

CH 13 P

Applicant: CHARLES CHURCHILL LIMITED

Faraday Road, Nottingham, England

Device for the automatic application of screws, Nuts and the like.

The invention relates to a device for attaching Screws, nuts and the like. And is characterized by two claws, a pivoted holder that is in position zvjisehen the claws for receiving one after the other attached and to be screwed in screws, nuts and the like. Movable, a hook controlling the gripper, which the Claws normally holding open, a® device for moving the nooke for the purpose of closing the claws while detecting the screw, nut or the like held by the holder. and then moving the bracket about its pivot bearing to release the item, means for subsequent bringing of the claws with the object to the mating thread or the like and subsequent opening of the claws, and a tool for moving or screwing the screw, nut or the like into the corresponding counterpart.

909885/1 1 1 T

Further features as well as advantages and details of the invention emerge from the following description of an exemplary embodiment with reference to the drawing. In this demonstrate:

Fig. 1 is a side view of the device;

Figs. 2A and 2B show the upper and lower parts of the device, respectively in longitudinal section;

Figures 3 A and J5 B together a partially sectioned Side view from the left according to FIG. 2;

4 shows a section through the lower parts of the device; and FIG. 5 shows a section along the line V-V in FIG. 4.

The screwdriver shown receives' Screws OK (see Fig. 2) one after the other over a channel 11, namely at regular intervals Time intervals from a delivery device 12 »<He not the subject of the present invention, but also B. according to a deposited on the same day by the aneader " German patent application can be designed. Every screw 10 is when released by the delivery device 12 in, a fork-shaped receptacle 13 held, which the shaft captured by the screw just below the head. The fork 13 is attached to the lower end of an arm 14 which is pivotable at 15 is mounted on the housing of the device and normally " is held in the position shown in FIG. 2 by means of the spring 16. . "

909885/1111

On both sides of the fork 13 claws 17 are arranged which grip the shaft of the screw 10 in the closed state. The claws 17, the tips of which are located exactly below the oabel 13, are attached to a sleeve 19 at 18 (see FIG. 3) hinged and biased by springs 20 in the closed position. In the position shown, the claws 17 are through a nook 21 kept open, which in turn is slidably mounted on a tubular shaft 22 in the sleeve 19 and - in the position shown in Fig. 2 - on a ring 42 at the bottom End of the shaft 22 rests .. The shaft 22 is by means of a. Yoke 23 connected to the piston rod 24 of a pneumatic cylinder 25 and carries on the upper find a housing 26, which is attached to the piston rod with screws 27 and has an air turbine 28. The driven by the turbine 28 Shaft 29 extends down through shaft 22 and carries a drill chuck 54 at its lower end.

Between a sleeve 52 at the upper end of the sleeve 19 and its collar 33 on the sleeve 19 there is a compression spring 31 and another compression spring 34 is clamped between the yoke 23 and the lower end of the sleeve 19 the shaft 22 and the sleeve 19 bearings 25 are arranged. Upper and lower Orenz switches 36 and 37 are switched by an actuating member 38 which is attached to the housing 26. A guide rod guided by an arm 40 attached to the sleeve 19 extends through an opening in a fixed plate 41.

In operation, after a screw 10 has been inserted into the oabel 13 Air is given into the cylinder 25 so that this the shaft lowers, the spring 34 initially the sleeve 19 at its starting height holds. If a shoulder 43 on the shaft 22 then to the

90988S./1111

8AD ORIGfNAt

If cam 21 strikes, it switches the nooke 21 downwards, as a result of which the springs 20 can close the jaws 17. Recesses 44 (see Fig. 4) in the jaws move inward to capture the nooke. As the shaft 22 descends, a roller 45 (see fig Figo 2) on the yoke 23 in engagement with a nook surface 46 on the arm 14 to rotate the nook in counterclockwise direction the action of the spring 16 about a pivot pin 15 »thereby the screw 10 held by the claws 17 is pulled away.

Thereafter, the lower surface of the housing 26 strikes the upper one End of the sleeve 32 and continued downward movement the shaft 22 moves the sleeve 19 via the spring 31 downward. The jaws, the shaft 22 and the drill chuck 30 with screwdriver shaft move downward together until the collar 33 on the sleeve 19 comes into contact with a stop 47 to stop the downward movement of the sleeve 19 and the claws 17, with a continuation of the downward movement of the shaft 22 compresses the spring 31. At the beginning of this last part of the downward movement of the shaft 22, the nooke 21 is downward out of the recesses 44 in the claws 17, whereby the claws are opened.

During the first portion of the downward movement of the shaft 22, during which the claws 17 close in the manner described, the drill chuck 30 is lowered with the screwdriver bit to engage the screw head and the turbine begins to rotate the shaft 29 and the screwdriver JQ «before the Claws 17 open. When the claws 17 open, the screw is located at the beginning of the inner bore into which it is to be screwed and the final downward movement of the screwdriver 30 screws the screw into it

909885/1111

BAD ORfGINAL

assigned internal thread. The downward movement of the screwdriver 30 stops when the actuating device 38 actuates the lower control switch 39. As a result, a valve in the compressed air supply of the cylinder 25 is switched over, as a result of which the shaft 22 is moved upwards. During the upward movement of the shaft 22, the ring 32 engages and lifts the lower surface of the nooke 21, thus allowing the jaws 17 to close when the nooke reaches a height exactly opposite the recesses 44 in the jaws. At the beginning of the upward movement of the yoke 23, the peder 34 lifts the sleeve and the claws 17 so that the claws are above the level of the head of the screw when the claws close. The Tolle are then returned to the position described and a work cycle ends when the actuating member 38 actuates the upper Orenz switch 36. This then stops the rotation of the turbine 28 and switches the compressed air supply to the cylinder 25 to start a new working cycle. During the upward movement, the case returned by the spring l6 in the position in which it can receive the next screw 10 is delivered from the Abgabeelnrlohtung 12 and the Nooke 21 is ram with respect to the jaw 17 in the in Flg. 4 shown position, about opening the gripper before the next screw can.

The fork 13 can also be used for this. Take up nuts and bring them into such a position that they can be screwed onto external threads on bolts. In which case the screwdriver is replaced by a suitable wrench to take up and turn the nuts. Of course you can the apparatus described also for screwing caps on screws "rwenden _r

Claims 909885/1111 "" "

BATH ORIGINAL

Claims (4)

1332411 CH 13 P PATENT CLAIMS IJ Device for the automatic attachment of nuts and the like, characterized by two claws (17) »a pivotably mounted holder (13)» which in position between the claws (17) for receiving screws * nuts and the like that are attached and screwed in one after the other A cam (21) which controls the gripper (17) and which normally keeps the claws open, a device for moving the cam (21) for the purpose of closing the claws (17) while detecting those held by Haitor (13) Screw, nut or the like. And subsequent movement of the bracket around its pivot bearing (15) for releasing the object, a device for subsequently bringing the claws (17) and the object up to the surface or the like and subsequent opening of the claws, and a tool for moving or screwing in the vision hood, nut or the like. In the corresponding counterpart. 2. Apparatus according to claim 1 «characterized in that that tool is a rotatable screwdriver for screwing screws into bores and that the screws of the claws (17) are aligned with respect to the holes. 3. Apparatus according to claim 1, characterized by a shaft (29) extending between the claws (17), the cam (21) being arranged to slide on this shaft 1st, a sleeve surrounding the shaft, which the claws (17) 909885/1111 ORIGINAL carries, a motor to drive the downward movement of the shaft, this taking the cam (21) with it and opening the claws (17), a device on the shaft for actuating the Holder (13) in the sense of a release of the object, a connection with play between the shaft and the sleeve, which transmits the downward movement of the shaft to the sleeve after the claws (17) have closed and the holder (13) the Object has been released, and by a device sun Stopping the downward movement of the sleeve / when the object has been aligned by the claws (17), with a further movement of the cam (21) with respect to the claws (17) this opens. 4. Apparatus according to claim 3 «daduroh g e k e η η -ζ e i c h η e t that the tool is a screwdriver or a wrench is in a rotatable bearing and is driven by means of a compressed air turbine. 809885/1111 JAHlOlRO