JPH10202549A - Machine screw holding tool with detachment prevention device for double ended driver bit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding tool which prevents fall, fluctuation and deviation of a machine screw by being inserted and fixed into/to a double ended driver bit when the double ended driver bit is held on a tool for rotation and the machine screw is screwed onto the tool for rotation and at the same time, is made easy in attachment/ detachment so that three of the tool for rotation, the double ended driver bit and the holding tool may be integrated, is prevented from being detached when the holding tool is inserted and fixed, and is small-sized, is not a hindrance and is made to have durability and strength. SOLUTION: In a machine screw holding tool with detachment prevention device for double ended driver bit which is constituted of a holding part 1, a rotation part 2 and a rotational part cover C, the holding tool is surely coupled with a double ended driver bit held on a tool for rotation and is prevented from being detached by a coil spring B provided with an obliquely provided notch 3 for detachment prevention device to be a detachment prevention device and a sliding contact part 14 at one end of the rotation part 2. The holding part 1 and the rotation part 2 are formed by metal made of the same material and a quenching is performed for a machine screw mounting port 12 and abrasion is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to prevent a screw from falling, swinging or coming off by inserting the screw into a double-ended screwdriver bit when the screw is screwed by gripping the double-ended screwdriver bit with a rotating tool. The present invention relates to a holding tool to be used.

[0002]

2. Description of the Related Art Conventionally, as a holder of this kind, a rotary cylinder C is connected to a plastic transparent cylindrical cylinder B as shown in FIG. An O-ring is formed to have the same hexagonal cross-section as the axis of the driver bit D, and an O-ringny for making the double-headed driver bit D tight is fitted to the inner peripheral surface of the rotary cylinder c. Therefore, the holder b is slidable and rotatable with respect to the bit axis of the double-headed driver bit. Is known. (Registration No. 300310 on August 10, 1994)
issue).

[0003]

In the above description of the prior art, there is no device for preventing the detachment from the double-headed driver bit D in the holder B of FIG. O-rings to fit tightly. However, this is because the retainer a obtains a frictional force for stabilizing the sliding when the holder a slides on the bit shaft of the double-headed driver bit D, and also suppresses the retainer a from separating by its own weight. Double head screwdriver bit D
The holder A has been detached from. In addition, the holder
Because of the two member configurations of the transparent shaft cylinder part B and the rotary cylinder C, the connecting member E is formed by the friction between the transparent plastic cylinder barrel part B made of transparent plastic and the metal rotation cylinder C. The inside diameter became large and they came apart and decomposed. In addition, the transparent shaft cylinder part B, which is a transparent plastic, is convenient because the screwed state of the screw can be visually checked, but the durability is poor and the tip of the transparent shaft cylinder part comes into contact with the rotating screw when screwing the screw. It has been cut into a trumpet shape and worn. In addition, the transparent shaft cylinder part B, which is made of plastic, needs to have a large thickness in order to have strength. For this reason, the outer diameter of the transparent shaft cylinder part B of the holder b becomes large, and when the screw is fitted to the tip of the bit, the tip of the bit is shaded by the tip of the transparent shaft cylinder part, making it difficult to see. There was a problem.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to use a commercially available double-headed driver bit having a hexagonal cross section of a bit shaft as a turning tool. Grab it into a usable state, and insert the holder from the tip of the double-ended screwdriver bit.Then, the tip of the double-ended screwdriver bit is attached to the holder so that the three points of the holder, double-ended screwdriver bit, and turning tool are integrated. The device is prevented from separating by providing a separation preventing device utilizing the ball groove. Further, in the above-described conventional technology, the structure in which the two members of the transparent shaft cylinder portion and the rotary cylinder are connected to each other enables the double-ended driver bit to freely slide and rotate with respect to the bit axis. But,
It is formed of the same material so that the holder can slide and rotate with respect to the bit axis of the double-headed driver bit between the ball groove at the tip of the double-ended driver bit and the lock chuck of the rotating tool. I do. Therefore, the holder body is directly slid and rotated with respect to the bit axis of the double-headed driver bit having a hexagonal cross section. Further, when the holder is not used, the holder is slid until it comes into contact with the lock chuck of the rotating tool, so that the holder is provided with a sufficient frictional force so that it can be kept inserted. However, when it is not needed at all, it can be easily removed from the double-ended screwdriver bit. And it is small and easy to hold so that it does not disturb or impair workability even if it is inserted as it is,
Further, it should be strong and durable so that it can be used for a long time. It is an object of the present invention to provide such a screw holder with a detachment prevention device for a double-ended screwdriver bit.

[0005]

In order to achieve the above object, a screw holder with a detachment prevention device for a double-ended screwdriver bit according to the present invention comprises: a cylindrical holding portion provided with a non-slip around the holding portion; The sliding contact portion formed equal to the circular arc of the outer circumference of the circular cross section of the maximum diameter of the double-headed driver bit having the hexagonal cross section of the bit shaft of the coil strip for the anti-separation device is formed in the notch for the anti-separation device. In the state that was worn,
A cylindrical rotating portion and a rotating portion cover made of the same material as the holding portion having a coil section for the anti-separation device inserted around the outer periphery of the rotating portion and having an inner periphery of the rotating portion having a circular cross section of the maximum diameter of the double-headed driver bit. The rotating part cover is configured such that the front end is fitted to the outer periphery of the holding part and the rear part is fitted to the outer periphery of the rotating part.

[0006]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1 to FIG. 3, the holder A is made of a round iron or a metal pipe, and a lathe or a drilling machine is used. The inner circumference 9 of the screw holder is adjusted to the size of the head of the screw. Drill or drill a circular hole in the longitudinal direction at 7.1 mm, which is the maximum diameter of the hexagon of the cross section of the double-headed driver bit D. Both the former and the latter have a circular cross section with a wall thickness of 0.5 to 2.0 mm. Process into a tube. At this time, the former should be about 0.5 mm larger than the diameter of the screw head, and the latter should be about 0.05 mm larger than the maximum diameter of the hexagonal cross section of the double-headed driver bit D. Then, a thin groove-shaped slip stopper 11 is engraved on the outer periphery 10 of the holding portion. Further, a notch 3 for the anti-separation device is formed at one end of the rotating portion 2 of the holder A by a milling machine or a cutting grindstone with a width of 2 to 5 mm and a depth of about one third or one half of the diameter of the outer periphery 8 of the rotating portion. It is provided diagonally. Further, in FIGS. 2 and 3, a coiled wire having a wire diameter of 0.6 to 1.2 mm with a wire diameter of about 0.2 mm larger than the outer diameter of the rotating part 2 of the holder A is used to reduce the pressure of the sliding contact part 14. Cut to a free length of 5 to 20 mm accordingly. At one end of the coil spring, there is provided a sliding contact portion 14 which is formed to be equal to the outer circumferential arc of the circular cross section having the maximum diameter of the hexagonal cross section of the double-ended driver bit D. The coil spring B for the anti-separation device is inserted into the rotating portion 2, and the sliding portion 14 is pressed or loosely attached so as to be hooked on the notch 3 for the anti-separation device. Then, the rotating portion cover C is fitted to the holding portion outer periphery 10 with the rotating portion cover tip 15 and the rotating portion cover rear 16 is fitted to the rotating portion outer periphery 8. Further, the screw mounting opening 12 may be quenched. In this manner, in FIG. 3, the ball groove 13 of the double-headed driver bit D is first gripped by the lock chuck 17 of the turning tool E, and a normal use state is set. Thereafter, when the bit insertion port 6 is inserted into the tip of the double-headed driver bit D on the ball groove 13 side with the holding tool A, the sliding contact portion 14 in the notched lower portion 5 is pushed out toward the screw mounting port 12. While moving toward the upper cutout 4. When pressed continuously, the outer periphery of the double-headed driver bit D is slid in a state of being pressed against the outer periphery of the double-ended driver bit D.
Due to the repulsive force of the coil spring B for the separation prevention device, the coil moves toward the notch lower portion 5 while returning in the direction of the bit insertion opening 6, and fits into the ball groove 13. This completes the insertion of the holder A into the double-ended driver bit D. In this state, even if the holder A is pulled in the direction of the screw mounting opening 12 from the double-headed driver bit D, the sliding contact portion 14 is sandwiched between the lateral wall 18 of the ball groove 13 and the notched lower portion 5 and cannot be pulled out. That is, the double-headed driver bit D can be pulled out from the bit insertion port 6 in the direction of the screw mounting port 12, but on the other hand, it is a one-way movement that cannot be pulled out. This operation is the same even when the double-ended driver bit D is rotating.
When further pressed, the sliding contact portion 14 moves from the notched lower portion 5 toward the notched upper portion 4 in the direction of the screw mounting port 12, and the double-headed driver bit until the bit insertion port 6 hits the lock chuck 17 of the turning tool E. The outer periphery of D slides. Since the sliding contact portion 14 is formed to be equal to the arc of the outer circumference of the circular cross section having the maximum diameter of the double-headed driver bit D, the object is brought into sliding contact with the outer circumference of the bit shaft, which normally has a hexagonal cross section. Although the sliding contact portion 14 cannot smoothly slide when it is rotated, the sliding portion 14 can smoothly slide around the outer periphery of the double-headed driver bit D even during rotation. Further, even when the holder A is not used due to the pressure contact of the sliding contact portion 14, the lock chuck 1 of the rotating tool E is always used.
7 and can be left attached.
Even if it is moved by mistake, it does not separate from the double-headed driver bit D, so it is sufficient to immediately return it to the original position. As described above, the sliding contact portion 14 has three functions of the frictional force when the holder A slides in the axial direction of the double-headed driver bit D, and the slipping and the separation prevention when rotating.
In particular, the driver bit D is gripped by the turning tool E, and the holding tool A is inserted into the tool bit D. That is, the turning tool E is turned in a state where three points are integrated, and the holding tool A is attached with a screw. The sliding contact portion 14 is not deformed even if it is strongly pulled in the direction of the mouth 12. This is because it is sandwiched between the lateral wall 18 of the ball groove 13 and the notched lower portion 5, and does not hook the lateral wall 18 of the ball groove 13 on the sliding contact portion 14. In addition, since the sliding contact portion 14 is made of a steel coil, it has excellent durability against friction and pressure. When using the holder A, the holder A is brought into contact with the lock chuck 17 of the rotating tool E, and the double-headed driver bit D
After confirming that the tip of the bit on the ball groove 13 side protrudes from the screw mounting opening 12 of the holder 保持, press the tip of the screw against the mating member to be screwed into the bit tip and screwed. And put it on the opposite side of the rotating tool E, that is, until the screw completely protrudes from the screw mounting port 12 to the inner periphery 9 of the holding portion. Then, the user releases his / her hand, puts it on the turning tool E, turns on the turning tool E, turns the tool, and applies a force in the forward direction with both hands for screwing. To visually check the screw being screwed, the screw is fitted to the tip of the bit, the tip of the screw is pressed against the mating material to be screwed, and then the holding tool A is not pressed completely against the mating material. A gap of about 10 mm is provided between the screw mounting port 12 and the counterpart material, and the 10 mm is screwed earlier. At this stage, the screw does not fall or swing, so that it is not necessary to hold the screw. Then, the holding tool A is turned to the turning tool E.
The screw should be pulled back until it hits the lock chuck 17, and then the screw is screwed to the end. As described above, the holder A is slidable and rotatable between the ball groove 13 of the double-ended driver bit D and the lock chuck 17 of the rotation tool E, and the holder A, the double-ended driver bit D and the rotation tool E are rotated. Are integrated without separating. Also,
When removing the holding tool A, first remove the double-headed driver bit D with the holding tool A inserted from the lock chuck 17 of the rotating tool E, and easily remove it by pulling out the double-headed driver bit D from the screw mounting port 12 side. be able to.

[0007]

Since the present invention is configured as described above, the following effects can be obtained.

In the screw holder with a detachment prevention device for a double-headed driver bit according to the first aspect, the detachment prevention device is formed by the configuration of the detachment prevention device cutout provided at one end of the rotating portion and the coil for the detachment prevention device. Due to the formation, the holder does not come off the double-headed driver bit. Further, it is slidable and rotatable with respect to the bit axis of the double-ended driver bit. Therefore, at the time of screwing, when the rotating screw mounting opening touches the mating material, the rotation stops by friction with the mating material, so that the mating material is not damaged. Further, since the holding portion and the rotating portion are made of metal and are formed of the same material, the size can be reduced. In addition, it is strong, hard to break down, and durable.

[0009] In the screw holder with a detachment prevention device for a double-ended screwdriver bit according to the second aspect, it is hardened by quenching the screw mounting opening, and is cut into a trumpet shape.
Wear can be prevented.

[0010] In the screw holder with detachment prevention device for a double-ended screwdriver bit according to the third aspect, by engraving a thin groove-shaped non-slip on the outer periphery of the holding portion, the workability is improved without slipping when holding by hand.

[Brief description of the drawings]

FIG. 1 is an overall perspective view.

FIG. 2 is an exploded perspective view.

FIG. 3 is an enlarged vertical sectional view showing a state in which a detachment prevention device is operated.

FIG. 4 is a longitudinal sectional view of a conventional holder.

[Explanation of symbols]

 A, Holder B, Coil Emission for Detachment Prevention Device C, Rotating Part Cover D, Double Head Driver Bit E, Rotating Tool 1, Holding Part 2, Rotating Part 3, Notch for Detachment Prevention Device 4, Notch Top 5, notched lower part 6, bit insertion port 7, rotating part inner circumference 8, rotating part outer circumference 9, holding part inner circumference 10, holding part outer circumference 11, non-slip 12, screw mounting port 13, ball groove 14, sliding contact part 15, tip of rotating part 16, rear of rotating part 17, lock chuck 18, side wall

Claims (3)

[Claims] 1. A two-headed cross-section of a bit axis of a coil spring (B) for a detachment prevention device formed in a cylindrical holding portion (1) and a slanted notch (3) for a detachment prevention device. In a state where the sliding contact portion (14) formed equal to the circular arc of the outer periphery of the circular cross section of the maximum diameter of the driver bit (D) is crimped or loosely attached, the coil spring for the anti-separation device is formed on the outer periphery of the rotating portion (8). (B) is inserted, and a cylindrical rotating part (2) made of the same material as the holding part (1) having the inner periphery (7) of the rotating part with a circular cross section of the maximum diameter of the double-ended driver bit (D), and The rotating portion cover tip (15) is placed on the outer periphery of the holding portion (10) after the rotating portion cover (1).
6) A screw holder with a detachment prevention device for a double-headed driver bit, comprising: a rotating portion cover (C) adapted to be tightly fitted to the rotating portion outer periphery (8). 2. The screw holder according to claim 1, wherein the screw insertion opening is quenched. 3. A screw holder with a detachment prevention device for a double-headed driver bit according to claim 1, wherein a thin groove-shaped slip stopper (11) is engraved on the outer periphery (10) of the holding part.