JPS60172426A - Driving device for machine screw - Google Patents

Abstract

PURPOSE:To make plural machine screws tittable into a work in an efficient manner, by holding the machine screw with a driving rod and a pushing rod in between from top and bottom, while driving it into a driven hole, in case of a driving device which drives the screw into a specified position of the work formed by a press. CONSTITUTION:Each machine screw 12 fed out of a parts feeder receives a regulating action by a plate spring and a pushing action by a pusher 22 whereby they are fed to the side of a finger 19 one by one. When each screw 12 is fed to the finger 19, a lifting cylinder 17 is set in extension motion, making a lifting rod 18 go up. This lifting rod 18 pierces through two guide holes 13 and 14 from the lower part, while it also pierces through a driven hole 11 formed in a work 10, coming nearer to the machine screw 12 little by little, and finally an upper end surface of the lifting rod 18 contacts a lower end surface of the screw 12, thus both rods 16 and 18 hold the screw 12 in between from top and bottom. And, with extension of a driving cylinder 15, the driving rod 16 goes down together with the screw 12 and the lifting rod 18 so that the screw 12 is thrust in the driven hole under guidance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for driving screws and the like into predetermined positions of various press-formed works.

For example, in order to fix screws in a predetermined position on a pressed product, conventionally the screws were welded and fixed, but when it was necessary to install a large number of screws, the workability was poor, and some kind of improvement was desired. .

The present invention has been made to satisfy these demands, and an object of the present invention is to provide a screw driving device that can efficiently attach a plurality of screws to a workpiece by press processing or the like. .

In order to achieve such an object, the present invention provides a mold plate that positions and holds a workpiece in which a screw driving hole is formed, and a press that faces each other so as to be able to move toward and away from the mold plate on the same axis with the mold plate sandwiched therebetween. A push-in rod and a driving rod, a push-in cylinder that raises and lowers a push-up rod arranged on the L side of the mold plate, and a push-up rod arranged below the mold plate I are attached to the mold plate. A push-up cylinder that penetrates the formed guide hole and the driving hole of the workpiece and is lowered A, and a 1=end surface of the push-up loft that penetrates the guide hole and the driving hole from below and the lower end surface of the driving rod. The mold plate 1 has a feeder for supplying screws between the mold plate 1 and
・And one of the push-up lofts that penetrated the workpiece and made it TR!
The screw is held between one end surface and the lower end surface of the driving rod from below, and is driven into the driving hole of the workpiece on both days as the rod moves downward.

Embodiments of the present invention will be described below based on the approved drawings.

FIGS. 1 and 2 show an example of a screw driving system to which the driving device according to the present invention is applied. includes a driving device 4, a feeder 5 that supplies screws (not shown) to the driving device 4, a press machine 6 that caulks and fixes the screws driven into a workpiece (not shown) by the driving device 4, and a screw. Dial table 3 with caulked workpiece
In addition to providing a take-out device 7 for removing from above, the mold plates 1 and 8.8 for positioning and holding the work are mounted on the upper surface of the dial table 3 at predetermined intervals. When a workpiece is positioned and placed on the surface, the workpiece is sequentially transferred to the driving device 4, the press machine 6, and the take-out device 7 by the indexing action of the dial table 3. 9 is a finger of the take-out device.

The driving device 4 is constructed as shown in FIGS. 3 to 5. In these figures, there is a work lO on the top surface of the dial table 3 that is indexed as described above.
Mold plates 1 and 8 for positioning and holding are fixed at predetermined intervals. Further, guide holes 13 and 14 are formed in the mold plate 8 and the dial table 3 to which the mold plate 8 is fixed, respectively, passing through the bottom of the -l corner.

Note that these guide holes 13 and 14 are approximately the same as the driving hole 11 of the screw 12 formed in the workpiece 1o.
The driving hole 11 and both guide holes 13
．． 14 are located on the same axis.

On both sides of the mold plate 8, there is a driving rod 16 which is raised and lowered by a driving cylinder 15 along the vertical direction.
In addition, push-up rods 18 that are raised and lowered by push-up cylinders 17 along the downward direction are arranged below the dial table 3, and these rods 16.1
8 are disposed on a straight line passing through the centers of the driving hole 11 and the guide hole 13, 14, and are opposed to each other so as to be able to move toward and away from each other. In addition, by making the cross-sectional area of the driving cylinder 15 larger than the cross-sectional area of the pressing cylinder 17, both cylinders 1
5. Apply the same hydraulic pressure to 17 and drive the driving rod 16.
When the push-up rod 18 collides with the push-up rod 18, both rods 16.18 are lowered at the same time due to the pressure-receiving area difference of the cylinders 15.17. Hole 11 and kite hole 13.14
By making the inner diameter slightly smaller than the inner diameter of the dial table 3, when hydraulic pressure is applied to the push-up cylinder 17, the push-down rod 18, which is raised and lowered by the cylinder 17, is moved to the dial table 3.
The driving rod 16 is accessed by passing through guide holes 13, 14 formed in the mold plates 1 and 8.

Further, a finger 19 made by Miki's claw is attached to the outer periphery near the lower end of the driving rod 16 in the raised position, and a screw 12 fed from a conventionally known parts feeder 20 via a hanging chute 21 is attached to the finger 18. The feeder 5 is configured by attaching a button 22 for feeding the feeder. The bushing 22 is constructed as shown in FIGS. 3 and 4, and includes an O-ring that connects the screws 12 supplied from the hanging chute 21 to the guide groove 24 of the plate 23 one by one between the fingers 18. 27 is a cylinder that slides the bushing 22, and 28 is a leaf spring that prevents two screws 12 from being supplied to the finger 18 at the same time.

” - In the screw driving device configured as described above,
The screw 12 supplied from the parts feeder 20 through the hanging chute 21 to the guide groove 24 of the play i 23 is
Under the regulating action of the leaf spring 28 and the pushing action of the bushing 22, the fingers are pushed into the finger 18 located on the outer periphery near the lower end of the driving rod 16 one by one. In this state, the finger 18 presses and holds the screw 12 by the force of the spring 26, and the first surface of the hiss 12 is in contact with the lower end surface of the driving rod 16.

When the hiss 12 is supplied to the finger 19 in this way, the push-up cylinder 17 is extended and the push-up rod 1
8! Make it 1. Then, this push rod 18
As mentioned above, dial table 3 and mold play 1
- Penetrates the kite holes 13 and 14 formed in the workpiece 10 from below, and the driving hole 1 formed in the workpiece 10.
1 and gradually approaches the screw 12, and finally the upper end surface of the pusher lower 1S'+8 collides with the lower end surface of the screw 12, and both rods 16 and 18 clamp the screw 12 from below -1- do. Then, as the driving cylinder 15 expands, the driving rod 16 descends together with the screw 12 and the push-up rod 18, so the screw 12 is reliably guided to the driving hole 11 of the workpiece 10 by the guiding action of the push-up rod 18. Driven. After the screw 12 is driven in this way, the driving rod 16 is raised and the push rod 18 is lowered to wait for the next driving by rotation of the dial table 3. Note that the fingers 18 are pushed open against the spring material 26 as the driving rod 18 descends.
When the driving rod 1B is located at the 1-outer end, it is returned again by the spring member 26.

Further, the workpiece 10 into which the screws 12 have been driven is supplied to the next press stage by the rotation of the dial table 3, where it is caulked by the press machine 6, and further,
At the take-out stage, it is taken out from the mold plate 8 by the take-out action of the take-out device 7. Therefore, the screw driving device according to the present invention is installed on the driving stage of the dial table 3 which rotates intermittently as in the embodiment, and a plurality of mold plates 8, 8 are mounted on the dial table 3.
When set, the workpiece 10 is placed on this mold plate 8.8.
By supplying the screws manually or automatically, the screws 12 can be efficiently driven into the workpiece 10.

In the embodiment, the screw driving device is set on the driving stage of the dial table, but it is of course possible to use it alone.

As explained above, according to the present invention, the screw is held between the top and bottom by the driving rod and the pushing rod and driven into the driving hole of the workpiece, so the screw can be reliably guided to the driving hole of the workpiece. At the same time, if necessary, by using a plurality of driving devices, it is possible to drive a plurality of screws at the same time.

[Brief explanation of drawings]

FIG. 1 is a front view showing the whole of a specific example of a screw driving system to which an embodiment of the present invention is applied, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a front view of main parts, and FIG. The figure is a plan view of FIG. 3, and FIG. 5 is a sectional view taken along the line v--■ of FIG. 3. 4... Driving device 5... Feeder 8... Mold plate lO... Work 11... Driving hole 12.
... Screw 13 ... Guide hole 15 ... Driving cylinder 16 ...
... Driving rod 17 ... Push-in cylinder 18
... Push-up rod 19 ... Finger 20 ... Parts feeder 21 ... Hanging chute 22 ... Pusher patent applicant Matsushita Giken Co., Ltd. agent Patent attorney Kiyoshi Nakayama

Claims (1)

[Claims] A mold plate that positions and holds a workpiece in which a screw driving hole is formed, and a coaxial line -L that sandwiches the mold plate.
A push-in rod and a driving rod that face each other so as to be able to approach and separate from each other, a push-in cylinder that raises and lowers the push-up rod that is disposed above the mold plate, and a push-up rod that is disposed below the mold plate. a push-up cylinder that passes through a guide hole formed in the mold plate and a driving hole in the workpiece and moves up and down; It has a feeder that supplies screws between the rod and the lower end surface of the rod, and has a feeder that passes through the mold plate and the workpiece and raises the screw.
4 between the negative end face of the rod and the lower end face of the driving rod.
- A screw driving device characterized in that the screw held from below is driven into the driving hole of the workpiece as both rods move downward.