JPH0529680U - Ratchet driver - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a ratchet driver which can be inserted into a narrow space and can be easily tightened and loosened. [Structure] A tightening bit rotating mechanism 2 and a loosening bit rotating mechanism 3 are arranged at both ends of a handle 1 of a driver, and a hexagonal bit 4 is fixed to a ratchet gear 7. This makes it possible to reduce the size of the bit rotation mechanism parts 2 and 3, and the size of both ends of the handle 1 to be less than or equal to the size of the head of the hexagonal bit. Therefore, this ratchet driver can be used in any place where the hexagonal bit itself can be used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ratchet driver that tightens or loosens bolts such as hexagon socket head bolts, and particularly to a ratchet driver that can be tightened and removed in a narrow place where small diameter hexagon socket head bolts can be attached. Related to.

[0002]

[Prior Art]

 Conventionally, this type of ratchet driver has a mechanism in which the bit of the driver can be exchanged and one bit rotating portion can be rotated forward and backward. For this reason, the handle (main body) has a large width and height, and is larger than the head of a small diameter hexagon socket head cap screw. Therefore, it is difficult to use in a narrow place, and the bit is too long to be used in a place where the height is low.

[0003]

[Problems to be solved by the device]

 As described above, the conventional ratchet driver has a large width and a large height, and in a narrow space, the small diameter hexagon socket head cap screw itself can be used, but the ratchet driver is too large to be used. It was

[0004]

[Means for Solving the Problems]

 The ratchet driver according to the present invention comprises a rod-shaped driver body, a tightening and loosening bit rotating mechanism portion provided at both ends of the body, and a ratchet gear disposed in each bit rotating mechanism portion. , A bit fixed in the center of the ratchet gear and having a predetermined shape, and the radius of the bit rotation mechanism is substantially equal to the radius of the head of the bolt to be tightened or loosened from the center of the bit. The same or smaller than that.

[0005]

In the present invention, the hexagonal bit fitted to the head of the hexagon socket head cap screw or the bit having the shape of (+) or (-) is fixed irremovably, and the mechanism of tightening and loosening is handled. Since it is provided separately at both ends of the, the size of the bit and the size of the rotating mechanism can be minimized. Therefore, the structure can be simplified and the size can be reduced.

[0006]

【Example】

 Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a special ratchet driver for a small diameter hexagon socket head cap screw according to a first embodiment of the present invention.

The handle (ratchet driver main body) 1 has a rectangular rod shape, and a tightening bit rotating mechanism section 2 and a loosening bit rotating mechanism section 3 are provided at both ends thereof.

As shown in FIG. 2, a ratchet gear 7 is arranged in each of the bit rotating mechanisms 2 and 3, and a hexagonal bit 4 is fixed to the center of the ratchet gear 7. The reverse rotation preventing rod 8 of the ratchet gear 7 is arranged so as to be biased toward the ratchet gear 7 by the compression spring 9. FIG. 3 is an enlarged view showing the ratchet gear 7 and the hexagonal bit 4.

The ratchet gear 7 to which the hexagonal bit 4 is fixed is inserted into the attachment portion of each bit rotation mechanism section 2 and 3, and the reverse rotation preventing rod 8 and the spring 9 are set, and then the gear rotation section fixing lid. 5 and the fixing lid 5 is fixed to the mounting portion with screws 6. As a result, the hexagonal bit 4 and the ratchet gear 7 are irremovably attached to the handle 1.

The hexagonal bit 4 is designed to have a minimum length not less than the depth (JIS-B1176) of the hexagon socket head cap screw. Both ends of the handle 1 where the bit rotation mechanisms 2 and 3 are arranged have a semicircular outer shape having a radius substantially the same as the radius of the head of the hexagon socket head cap screw.

When tightening the hexagon bolt, the ratchet driver configured as described above inserts the hexagonal bit 4 of the bit rotation mechanism unit 2 into the head of the hexagon socket head cap screw, and holds the bit rotation mechanism unit 3 side in the hexagonal shaft. Tighten by rotating the bolt. On the contrary, when loosening the hexagon bolt, use the hexagon bit 4 of the bit rotating mechanism 3 and rotate the hexagon bolt with the other side to loosen it.

In the present embodiment, the length of the hexagonal bit 4 is small corresponding to the depth of the hole of the hexagonal bolt, and the portion provided with each bit rotation mechanism section 2 and 3 is a hexagonal slot. Since it is not larger than the head of the bolt, it can be tightened and loosened if the hexagon bolt itself can be placed.

By using a bit having a shape such as + or − as the bit 4, it can be used for various bolts and screws other than the hexagon socket head cap screw.

[0015]

[Effect of the device]

 As described above, the present invention fixes the bit and separates the tightening and loosening mechanisms to make the handle (main body) as small as possible, and the narrowest spot where the small diameter hexagon socket bolt is used. However, there is an effect that the work can be done easily and the product and the bolt are not damaged by the bit coming off the bolt head due to the reduction of man-hours and tightening / removing from an unreasonable angle.

[Brief description of drawings]

FIG. 1 is a perspective view showing a ratchet driver for a small diameter hexagon socket head cap screw according to an embodiment of the present invention.

FIG. 2 is an internal detailed view of the bit rotation mechanism unit of FIG.

3 is an enlarged view of the ratchet gear of FIG. 2. FIG.

[Explanation of symbols]

 1; Handle (main body) 2; Tightening bit rotation mechanism part 3; Loosening bit rotation mechanism part 4; Hexagonal bit 5; Bit rotation part fixed lid 6; Fixed lid mounting screw 7; Ratchet gear 8; Reverse rotation prevention rod 9 ;spring

Claims (1)

[Scope of utility model registration request] 1. A rod-shaped driver main body, tightening and loosening bit rotating mechanism sections provided at both ends of the main body, ratchet gears arranged in each bit rotating mechanism section, and this ratchet gear. And a bit fixed in the center of a predetermined shape, and the bit rotation mechanism section,
A ratchet driver, wherein the radius from the center of the bit is substantially the same as or smaller than the radius of the head of the bolt to be tightened or loosened.