JPS5928740Y2 - Screw alignment and feeding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an arrangement and supply device for screws, etc., which sequentially aligns and holds multiple screws, bolts, or rivets of the same type and shape at intended supply positions.

As a means of automatically feeding a large number of screws stored in a hopper etc. by adjusting their head orientation, we have proposed methods that utilize centrifugal force or minute vibrations. Japanese Unexamined Patent Publication No. 53-10 related to applications filed by the same person
There are methods such as those proposed by No. 5800.

Depending on the purpose, the screws, etc. fed out by these means are conveyed to the target position either directly or via another feeding device. In the case of sequential tightening, it is necessary to temporarily hold the supplied screw in the bit tip area of the screwdriver.

Furthermore, when tightening the screws, consideration must be given not only to the case where the screw is tightened in a flat position, but also to the case where the screw is tightened in a deep and narrow place.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a screw feeder that is capable of tightening screws not only on a flat surface but also on a large surface with a deep drop, especially in combination with an electric screwdriver device.

The following will explain the embodiments shown in the drawings.

Fig. 1 is a side view showing an embodiment of a combination of the device of the present invention and an electric screwdriver, and Fig. 2 is an exploded perspective view of the main parts. A first oscillating body The swinging end of the rocking body X faces the cut groove of the storage pipe 1.

Further, in this groove, a second rocking body Y having a groove portion wider than the inside of the head of the screw is inserted between both sides of the first rocking body X. It is arranged to interlock with the rocking body X at a constant movement interval.

A guide groove 3 is provided which is connected to the depression groove on the side of the fulcrum 2 of the first rocking body X, and at the lower end of the guide groove 3,
A gate plate 4 having a through hole 5 deep enough for one of the screws to fall into is provided so as to be movable from a position where the hole 5 and the guide groove 3 coincide to another position, and is not energized at all times. The structure is such that the hole 5 and the guide groove 3 are positioned by the acting force of the spring 6.

Then, at another position to which the gate plate 4 has moved, a second guide groove T is provided which is connected to the hole 5 on the back side of the gate plate 4.

On the other hand, an electric screwdriver 8 is attached to a holder 10 that is slidably attached to a support rod 9 that is juxtaposed to the screw supply mechanism section consisting of the guide groove 3, etc., and its bit 11 moves up and down under rotational motion. This is how you get it.

Further, a pulley 12 is fixed to the bit 11.

A relay pulley 15 is attached to the pivoting end of the support rod 14 rotatably supported by the support shaft 13 of the stationary part on the supply mechanism side.
A belt 18 is placed between the relay pulley 15 and the bit 11 and a pulley 17 which is rotatably supported and fixed to a shaft 16 that drives the first and second rocking bodies X and Y. A belt 19 connects the pulley 12 fixed to the pulley 12.

In order to smoothly perform the connection by the belt 19, a guide roller 20 is provided on the support rod 9 so as to be rotatable and movable in the axial direction.

Therefore, as the bit of the electric screwdriver 8 rotates, the screw stored in the storage tube 1 is moved to the belt 1 by the pulley 12.
9. The first and second rocking bodies X and Y swing together by the shaft 16 which is rotationally driven via the relay pulley 15, the belt 18 and the pulley''17, and this movement causes the screws to overlap in an unspecified direction. The condition is first unraveled under the swinging action of the second swinging body Y, and the screw remaining on the depression groove of the first swinging body X causes its head to fall with its head upward due to its own weight, and, While the first rocking body X is rocking, it slides down toward the guide groove 3 with its head suspended on the groove edge.

Therefore, the screws are sequentially introduced into the guide groove 3 while being aligned in a fixed direction.

The gate plate 4 facing the lower end of the guide groove 3 has its through hole 5
One screw is in a depressed state, and as the bit 11 of the electric screwdriver 8 is pushed down to the operating position under the action of an interlocking member to be described later, the force of the energizing spring 6 is applied. The hole 5 is moved down from the position corresponding to the previous guide groove 3 to another position where the second guide draft 7 is located.

The gate plate 4 has been moved to a position where the second guide groove 7 and the through hole 5 match, and when a screw located in the through hole 5 falls into the second guide groove 7 from the back side of the hole 5, the gate plate 4 is ridged. It travels along the groove 7 toward the movement area of the bit 11.

That is, in the supply mechanism, under the operation of the electric screwdriver 8, a portion of the driving force is used to tighten the bit 11 once (-times of tightening is an operation) in response to one vertical movement (-times of tightening is an operation). The mounting bracket for tightening it leads to the mouth.

Here, the device of the present invention is provided with a unique mechanism for mounting the screw in the area where the bit 11 moves for its tightening operation.

That is, one end of the tube 22 is fixed to the mounting opening 21 with a receiver made of an elastic material such as metal.

The tube 22 of the receiver is attached to a part of the peripheral wall of the base.
A screw inlet 23 is opened which is aligned with the guide groove 7 of the bit 11, and the neck of the screw is temporarily attached to the inner circumferential wall of the tip of the cylindrical body with a length such that the tip is exposed at the lowest position of the bit 11. A stepped portion 24 is provided in the circumferential direction for engaging the tube, and several slot grooves 25 are bored extending from the tip toward the longitudinal direction of the cylinder.

On the other hand, an action plate 27 is rotatably supported on the shaft 26 of the stationary part of the device, and one free end of the action plate 27 is guided into the second guide groove 7 and placed in the movement area of the screw toward the mounting opening 21. At the end of the ridge, there are provided a part 28 which partially enters into the groove from below the ridge 7, and a hanging piece 29 which enters into the intake port 23.

Further, by means of a spring 30 suspended between the other free end of the action plate 27 and a stationary part of the equipment, the steel plate 27 normally has a tendency to move in the direction in which its hanging piece 29 enters the intake port 23. It is configured to hold.

Furthermore, the intermediate edge of the action plate 27 is slidably fitted to the tip of a support rod 31 hanging from the holder 10 for mounting the electric screwdriver 8, and the expansion spring 32 inserted into the rod 31 is fitted. Push-down rod 3 that is always held in the tip region by acting force
It is facing the moving descent area at the end of No. 3.

Incidentally, the tip of the spring plate 34 that acts on the gate plate 4 also faces the movement range of the push-down rod 33.

Therefore, when the electric screwdriver 8 is pushed down together with the holder 10 from the state shown in the second figure, the bit 11 passes through the mounting opening 21 and enters the tube 22, and the support rod 31 that is integrally attached to the holder 10 is pushed down. Push-down rod 33 at the tip
The action plate 27 and the spring plate 3 are lowered at the tip of the rod 33.
4 to the gate plate 4 to their energizing springs 30 and 6.
As a result, the action plate 27 rotates counterclockwise in FIG. 2 about the shaft 26, and its one free end is located at the position shown by the solid line in FIG. With,
Due to the above-described movement of the gate plate 4, one screw is guided into the second guide groove 7 and reaches the opening 23 of the tube 22 (the third illustrated state).

At this time, if a screw is attached to the tip of the tube 22, the receiver will
As the bit 11 descends and rotates, this screw is screwed and tightened to the surface to be screwed, but the tightening of the screw by the bit 11 is caused by the amount of downward movement to the area and the action plate 27 and gate plate 4 by the push-down rod 33. The difference in the amount of movement to the action area is absorbed and adjusted by stopping the movement of the push rod 33 due to the compression of the expansion spring 32 provided on the support rod 31, which lowers as the bit 11 descends.

The receiver is the first one that has not yet been fitted with a screw at the tip of the tube 22.
When the driver is depressed for the second time, the driver 8 is pulled up immediately after the depression, so that the instrument body including the mounting opening 21 is in a lowered position due to the instrument's own weight.

As the push rod 33 rises as the bit 11 rises, the action plate 27 rotates clockwise in FIG. In the tip region of the groove 7, the third part has partially entered the groove 7 from below.
After passing through the state shown by the dashed line in the figure, the hanging piece 29 enters into the mouth 23 by pushing the screw that had reached the socket 23 into the pipe 22 from the side (the fourth state shown in the diagram). )
.

As a result, the screw bit 11 retreats and the receiver, which becomes hollow, is pushed into the cylinder 22 and falls due to its own weight, and is temporarily attached to the tip of the cylinder with its neck suspended on the stepped part 24. .

Next, by performing the above-described operation of pushing down the electric screwdriver 8, the next screw is fed into the socket 23, and the screw at the tip of the cylinder is screwed and tightened.

At the final stage of this screw tightening, due to the biting force of the screw into the landing surface, the retainer at its neck expands the slotted groove 25 in the tube 22 and is pulled out from the stepped portion 24. , proper tightening is the condition.

In this way, in the device of the present invention, the cylindrical receiver provided at the mounting opening of the screws, which are fed in one by one while being aligned, is temporarily suspended by the cylinder, and this receiver is As the screws are attached to the mounting surface, the receiver pushes the screws into the cylinder using an action member that is linked to the movement of feeding one screw to ensure reliability. Since this receiver is provided with a tube, it can be easily attached to a deep and narrow depressed surface by inserting the tube together with the tube, in addition to cases where the surface on which the screw is attached is flat.

Furthermore, when used in conjunction with an electric screwdriver, in the vertical movement mechanism of this screwdriver, for example, by providing a tightening screw with a knob that can be temporarily fixed between a part of the holder and the support rod, the depressed position of the screwdriver can be adjusted. It is also possible to fix the movement of the bit with the screw with the tip of the bit protruding from the tube, and to control the electric screwdriver to rotate in the opposite direction to loosen the screw from the mounting surface.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the device of the present invention used in combination with an electric screwdriver, Fig. 2 is an exploded perspective view of its main parts, and Figs. 3 and 4 respectively show the operating state. FIG. 2 is a longitudinal sectional side view of the main parts of the device of the present invention shown in FIG. 1... Storage, 3... Guide groove, 4...
...Gate plate, 7...Second guide groove, 8...
...Electric screwdriver 11...Pill-12
1... Mounting opening part, 22... Receiving tube, 2
3...Uke is mouth, 24...Danbe, 25.
...Slotted groove, 26...Protrusion, 27...
...Action plate, 29...Descent piece, 33...
...push rod.

Claims (1)

[Scope of utility model registration request] The screws are guided from the storage tube to the guide hole and sent out in an aligned manner.The screws are fed out one by one by the action of a gate placed in the guide path.A cylinder made of an elastic material is attached to the free end of the screw installation opening. A screw receiver is provided with a cylinder, in which a locking step for locking the screw head is provided in the circumferential direction on the inner circumferential wall of the screw head, and several slot grooves are bored extending from the end in the cylinder length direction, and The tube is attached to the receiver by providing a screw receiver with an opening at the base and an operating member for pushing the four facing screws into the tube in conjunction with the screw feeding operation of each screw by the gate section. A device for aligning and feeding screws.