JPS6257879A - Driver device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a driver device used for tightening a screw with a washer.

(Prior Art) Driver devices have been widely used in various fields for screwing screws into workpieces.

As shown in FIG. 7, the most typically used driver device 30 has a driver 32 attached to the rotating shaft of a motor 31. Driver 3 to set 33
2, the tip 32a itself is magnetized, and the tip 32a itself is magnetized.
2a is required to attract the head 33a of the screw 33.

Also, although not shown, a chuck member is provided at the tip of the driver, the screw is placed on the chuck member by air flow, and the tip of the driver, which is lowered from above inside the chuck member, is attached to the head of the screw. There is a device that utilizes an air flow that is brought into contact with a part of the body.

(Problems to be Solved by the Invention) However, there are the following problems in screwing operations using these driver devices.

In a driver device that uses a magnet, as shown in FIG. 8, it is difficult to align the core of the driver 32 with the core of the screw 33.
3 may come off from the head 33a, or the screw 33 may be screwed in an inclined state.

Driver devices that use airflow have the same problems as those that use magnets, and in addition,
In order to feed and set the screw 33 whose washer 34 is integrated with the head 33a as shown in the figure, the washer 34 becomes an obstacle and the screw 33 tilts, so that the head of the screw 33 can be smoothly removed. It may not be possible to match the portion 33a with the driver 32.

BACKGROUND OF THE INVENTION An object of the present invention is to provide a driver device capable of tightening a screw with the core of the driver aligned with the core of the screw with a washer.

The second invention makes it possible to easily match the core of the driver with the core of the screw with a washer while rotating the driver.
Moreover, it is an object of the present invention to provide a driver device that allows the tip of the driver to easily fit into the groove of the head.

Structure of the Invention (Means for Solving the Problems) This invention is based on the invention in which a screw suction part H for suctioning the head side of a screw with a washer is fixed to the tip of a screwdriver, and the tip surface of the suction member is fixed. The driver device is configured such that the washer can come into contact with the washer.

Further, in the second invention, a flange member is fixed to the intermediate part of the driver so that the tip of the driver protrudes, and
A screw suction member that suctions the head side of the screw with a washer is attached to the flange member in a floating manner via a connecting member,
The driver device is configured such that the washer can come into contact with the distal end surface of the suction member.

(Function) In the first invention, the washer of the washer-equipped screw is brought into contact with the distal end surface of the suction member fixed to the distal end of the driver, so that the centers of the screw and the driver coincide.

In the second invention, in addition to the effect of the first invention, the screw suction member is attached to the flange member in a floating manner via the connecting member, so that the tip of the driver fits into the groove of the head of the screw while rotating the driver. can be done.

(Example) A first example embodying the first invention will be described based on FIG. 1. The driver device of this embodiment also consists of a motor and a driver attached to the tip of its rotating shaft, just like the conventional driver device described above, and the feature of the present invention is present in the tip of the driver. Therefore, FIG. 1 shows the tip portion.

A screw suction member 2 is fixed to the tip portion 1a of the driver 1, and a washer 5 of a screw with a washer (hereinafter simply referred to as a screw) 6 is suctioned to the lower surface of the suction member 2.

The screw adsorption member 2 is a hollow body made by hollowing out the center of a short cylindrical metal body, and the hollow part 7 is made up of a small hollow part 7a with a small diameter and a large hollow part 7b with a large diameter. It has become.

The tip part 1a of the driver 1 is molded into the small hollow part 7a, and the screw 8 is attached to the upper part of the screw suction member 2 and is screwed horizontally toward the axis from the outside. 2 is fixed to the tip portion 1a of the driver 1.

The large hollow part 7b has a diameter and depth such that the head 6a of the screw 6 can enter from the lower end surface, and the tip of the driver 1 projects from above. The tip of the screwdriver is the screw suction member 2.
The head 6a of the screw 6 that entered the large hollow part 7b from below
It comes into contact with the plus-shaped groove 9 carved into the head 6a.

Further, magnets 10 are fitted into the lower end surface side of the screw attracting member 2, and the washers 5 of the screws 6 are attracted to each magnet.

Next, when looking at the functions and effects of the driver device having the above structure, when the rotation of the driver 1 of the driver device is stopped, the screw 6 is attached to the tip of the screw suction member 2 fixed to the driver '1. The washer 5 is attracted. And driver 1
Match the tip of the screw 6 with the plus-shaped groove 9 of the head 6a of the screw 6.

At this point, the washer 5, which is integrally formed on the head 6a of the screw 6, is attracted by the magnet 10 and is tightly attached to the lower end surface of the screw attracting member 2, so that the core of the driver 1 and the core of the screw 6 are tightly connected. Match.

Then, the driver 1 is rotated by applying the tip of the screw 6 to the workpiece to which the screw 6 is to be attached or to its screw hole (not shown). Then, since the core of the driver 1 and the core of the screw 6 match, the screw 6 will spiral in the direction that the driver 1 is facing and will not tilt. Further, the head 6a of the screw 6 is completely inserted into the large hollow part 7b and cannot be moved in a direction perpendicular to the core of the driver 1, so that the head 6a is not moved from the tip of the driver 1. It never comes off. When the screw 6 stops rotating in this manner, one screwing operation is completed.

Next, a second embodiment embodying the second invention will be described based on FIGS. 2 to 5.

In this embodiment, a plurality of driver devices 13 are mounted on an arm 15 as shown in FIG.
The arm 15 is lowered while the driver 1 is rotated by a motor 16. Same arm 15
A workpiece 14 to be screwed is placed below the workpiece 14, and a plurality of screws 6 are screwed to the workpiece 14 at the same time.

As shown in FIG. 3, a thick-walled hollow flange member 3 is placed at the top of the tip 1a of each driver 1, and is fixed by a screw 8 screwed horizontally from the outside toward the axis. There is.

The lower end surface side portion of the seventh rank portion 3 is a stepped portion 11, and the outer diameter is smaller than the other portions. One end of a coil spring 4, which is a type of connecting member 4, is fitted into the stepped portion 11.

The coil spring 4 hangs down so as to surround the driver 1, and a stepped portion 12 on the upper end surface side of the screw suction member 2 is fitted into the other end thereof.

The screw suction member 2 has almost the same structure as the first embodiment, and has a small hollow part 7a in the center of the short cylindrical metal body.
There is a large hollow part 7b.

Although the tip portion 1a of the driver 1 is fitted into the small hollow portion 7a, the screw suction member 2 is not fixed to the tip portion 1a of the driver 1. Therefore, when the driver 1 rotates, the screw suction member 2 rotates via the coil spring 4 and is also able to float.

Large hollow part 7 provided on the lower end surface side of the screw suction member 2
b has a diameter and depth sufficient to allow the head 6a of the screw 6 to enter from its lower end surface, and the tip of the driver 1 protrudes from above. The tip of the driver 1 can come into contact with the head 6a of the screw 6 that has entered the large hollow part 7b from below the screw suction member 2, and can match with the plus-shaped groove 9 cut therein.

Further, a magnet 10 is fitted into the lower end surface of the screw attracting member 2, so that the washer 5 of the screw 6 can be attracted thereto.

In this way, the combination of the flange part vi3 and the screw suction member 2 of the second embodiment is such that the screw suction member 2 drilled in the first example is divided into two parts vertically, and the upper divided part is used as the flange member 3 by a driver. 1, and the lower divided portion is directly used as the screw suction member 2 and connected to the flange member 3 via the coil spring 4 without being fixed to the driver 1.

Next, the functions and effects of the driver device 13 of this embodiment having the above structure will be described.

With the rotation of the driver 1 stopped, the lower end surface of the screw suction member 2 is brought close to a screw storage means or a screw supply means (none of which are shown), or the said means is brought close to the screw suction member 2, and the screw suction member 2 is brought close to the screw suction member 2. The head 6a of the screw 6 is suctioned onto the lower end surface of the screw 2. In this case, in the storage means or supply means, the screws are stored or supplied in a state in which they are aligned so that the heads of the screws face upward by a specific device, such as a screw pumping device.

The washer 5 of the screw 6 is attracted to the lower end surface of the screw suction member 2 as shown in FIG. There is no need for the orientations of 9 and 9 to completely match as in the first embodiment. For example, as shown in FIG. 4, the direction of the plus sign at the tip of the driver 1 and the direction of the plus sign @9 of the head 6a of the screw 6 may be deviated by 45 degrees.

After the screw suction member 2 suctions the screw 6 to its lower end surface in this manner, the driver '1 is rotated. The direction of rotation is the same as the helical direction of the coil spring 4. The two stepped portions 11 and 12 are fitted into the ends of the coil spring 4.
．． 12, so when the driver 1 is rotated in a direction opposite to the helical direction of the coil spring 4, the coil spring 4 expands to increase its helical diameter, and the step is removed. This is because it becomes impossible to keep holding the parts 11 and '12. Therefore, the spiral direction of the coil spring 4a is determined in consideration of the direction of rotation of the driver 1.

Next, when the driver 1 rotates, the arm 15 is lowered so that the tip of the screw comes into contact with the location where the screw 1 is to be fastened on the workpiece 14, as shown in FIG.

In this process, the flange member 3, coil spring 4, and screw suction member 2 act as follows.

As the driver 1 rotates, the flange member 3 integrally fixed to the driver 1 also rotates.

Restricted by the rotational force of the flange member 3, the screw suction member 2 and the screw 6 suctioned to the lower end surface of the suction member 2 also rotate via the coil spring 4.

The driver 1 descends, and the tip of the screw 6 touches the workpiece 1.
4, the rotational speed of the screw 6 or the screw suction member 2 together with the screw decreases due to the contact friction force.

As shown in FIG. 4, even if the direction of the plus-shaped tip of the driver 1 and the direction of the plus-shaped tip of the head 6a of the screw 6 do not match, the rotational speed of the screw 6 or the screw suction member is While the rotational speed is lower than the rotational speed, there is an opportunity for the tip of the driver 1 to match the groove 9 of the head 6a of the screw 6, and at that time, the tip of the screwdriver 1 that has descended will touch the screw 6 as shown in FIG. , and the two eventually coincide. Then, the screw 6 receives the rotational force of the driver 1 as it is and is screwed into the workpiece 4.

During this time, the coil spring 4 in the floating state twists slightly to account for the delay in the rotation of the screw suction member 2, and the screw 6
is compressed until the tip of the driver 1 screwing the workpiece 4 comes into contact with the head 6a of the screw 6.

In this way, according to the driver device 13 of this embodiment,
If the screw 6 is suctioned so that the washer 5 is brought into contact with the lower end surface of the screw suction member 2, the orientation of the plus-shaped tip of the driver 1 and the orientation of the plus-shaped groove 9 of the head 6a of the screw 6 will be the same. There is no need to perform matching operations every time you tighten screws.
It is possible to complete the screw + h screw work.

In addition, since the head 6a of the screw 6 is inserted into the large hollow part 7b of the suction member 2, the tip of the driver 1 is inserted into the head 6 of the screw 6.
It never deviates from a.

As described above, in the Suiden-12 invention, by attaching the screw suction part vJ2 of a specific structure to the tip portion 1a of the driver 1, excellent functions and effects are exhibited as the driver device 13 for the screw 6. The configurations of these inventions are not limited to the above embodiments, and can also be implemented in the following manner, for example.

(1) The washer 5 does not need to be integrally fixed to the head 6a of the screw 6, and may be a combination of a separately manufactured washer and screw.

(2) The shape of the groove 9 in the head 6a of the screw 6 and the shape of the tip of the driver 1 may be in the shape of a minus sign, or may be a shape in which the plus and minus letters are smaller.

(3) The suction member 2 may be connected to a vacuum system and have a suction port, but it is preferably attached with a vi510. In addition to being able to directly attract the washer 5, the magnet 10 is attached to the large hollow part 7b, and is attached to the head 6 of the screw 6.
It may be adapted to adsorb a.

(4) The connecting part vU4 is connected to the flange member 3 and the screw suction part 2
Any material may be used as long as it has the function of connecting the two members and can be attached in a manner that absorbs deviations in relative rotation between the two members. Such materials include flexible resins, rubber, fibers, fabrics, and the like.

(5) The driver device 13 can be attached to the arm 18 of the robot 17 as shown in FIG. 6, and the screw 6 can be automatically attached as one element of the device.

Effects of the Invention - In the invention, the washer of the screw is brought into contact with the tip of the screw adsorption member, so the cores of the screw and driver are aligned,
The effect is that the screw can be screwed straight into the workpiece.

In the second invention, in addition to the effects of the first invention, the tip of the screwdriver can be naturally aligned with the groove in the head of the screw while rotating the screwdriver, so that the screw that is attracted by the screw suction member is simply The effect is that the screw tightening work can be completed simply by applying the screwdriver to the workpiece and lowering the driver.

Therefore, the screw tightening operation becomes easy, multiple driver devices can be used at the same time, and the screw driver can be attached to a robot and the robot can perform the screw tightening.

[Brief explanation of the drawing]

Fig. 1 is a partial vertical sectional side view of the tip of the driver in the second embodiment, Fig. 2 is an explanatory diagram showing screwing a workpiece using the driver device of the second embodiment, and Fig. 3 The figure is a partial vertical sectional side view of the driver tip before the driver and screw head match in the second embodiment, and Figure 4 is the direction of the driver tip and the direction of the groove in the screw head in the second embodiment. FIG. 5 is a partial vertical sectional side view of the driver tip after the driver and screw head match in the second embodiment, and FIG. 6 is an example of application of the second invention. In the drawings, FIG. 7 is a perspective view of a conventional driver device, and FIG. 8 is a partial side view showing a state in which a driver and a screw are in contact with each other in the same device. Driver 1, washer 5, screw with washer 6, head 6a, screw adsorption member 2, flange member 3, connection member 4°

Claims (1)

[Claims] 1. A screw (5) with a washer (5) is attached to the tip of the driver (1).
A screw suction member (2) that suctions the head (6a) side of the screw suction member (6) is fixed, and the washer (
5) A driver device characterized in that it is capable of abutting. 2. The driver device according to claim 1, wherein the screw attracting member (2) is made of a magnetic material and has a magnetic force, or is provided with a magnet. 3. Fix the flange member (3) to the middle part of the driver (1) so that the tip of the driver (1) protrudes, and fix the head (6a) side of the screw (6) with washer (5). A screw suction member (2) to be suctioned is attached to the flange member (3) in a floating manner via a connecting member (4), and the washer (5) can be brought into contact with the tip surface of the screw suction member (2). A driver device characterized by: 4. The driver device according to claim 3, wherein the screw attracting member (2) is made of a magnetic material and has a magnetic force, or is provided with a magnet. 5. The driver device according to claim 3, wherein the connecting member (4) is a coil spring.