JPH08118246A - Bolt fastening tool - Google Patents

Abstract

PURPOSE: To obtain a bolt fastening tool which can prevent a mis-fastening or an accompanying rotation of a bolt or the like, by providing a bit for fixing to engage to the groove of the bolt or the like, in a socket rotated by a gear. CONSTITUTION: When a nut 5 is fastened by a socket 6, a bit 7 for bolt fixing provided in the socket 6 is engaged to the groove of a bolt or the like 1. This bit 7 for fixing is fixed to a bit slide tool 18 through a bit return spring 15, only in the rotating direction by a rectangular shaft or the like. It is made movable in the lateral direction through the bit return spring 15. And even though the nut 5 is fastened and rotated by the socket 6, and advances in the lateral direction, the bit 7 for fixing follows by the bit return spring 15, and the bolt or the like 1 is fixed constantly. Consequently the nut 5 is not rotated together with the bolt or the like 1, and can be fastened securely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener for bolts or machine screws.

[0002]

2. Description of the Related Art When tightening bolts or machine screws from one side, tighten the nuts etc. while fixing one side with a wrench or a manual screwdriver, etc. and the bolts or machine screws will rotate together with the nut and cannot be tightened. It was. In order to prevent this co-rotation, there is a method of fixing the nut and rotating the bolts or machine screws, or a method of tightening by relatively moving the nut and the bolts or machine screws.

[0003]

If the above-mentioned bolts or machine screws are thin, a problem occurs in the tightening force and durability. That is, since there is a difference in tightening force, the tightening work cannot be performed reliably and the work efficiency is poor.

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and prevent the bolts or machine screws from being unfastened or co-rotating.

[0005]

[Means for Solving the Problems] To prevent co-rotation when tightening bolts or small screws from one side, the screw portion is engaged with the cover side so as not to rotate, instead of rotating the screw portion, It is achieved by rotating and tightening only the nut with a hand tool and a power tool. This is also achieved by making the screw part engageable with the cover side by using two shafts. It is also achieved by increasing the tightening force by decelerating and increasing the force with gears. Further, the engagement with the screw portion is fixed in the rotational direction, and the spring portion is movable in the left-right direction, so that the nut is tightened while always engaging with the screw portion. Further, since the bolts or machine screws are not rotated, the rotation shaft is biaxial and the tip is fixed to the cover and the bit slide tool via the bolt fixing bit. Further, it is achieved by using a pinion and a gear to increase and decrease the tightening force so that they can be easily replaced. It is especially convenient for tightening work that uses an impact wrench that cannot easily increase or decrease the force.

[0006]

As shown in FIG. 4, the spindle shaft of the hand tool and the power tool is connected to the socket 14, the pinion and the socket 14 are connected by the hexagonal shaft and the hole as shown in FIG. 3, and the gear and the pinion are gears. It meshes and is connected to the socket 6 with a hexagonal shaft and a hole, and the socket 6 and the nut 5 are connected with a hexagonal part as shown in FIG. When tightening the nut with the socket 6, the fixing bit 7 in the socket 6 engages with the groove of the bolt or machine screw as shown in FIG.
The fixing bit 7 is fixed to the bit slide tool via a bit return spring only in the rotation direction by a square shaft and a hole as shown in FIG. Since it can be moved to the left and right via the bit return spring, even if the nut is tightened by the socket 6 and rotates and moves to the left in FIG. 1, the fixing bit follows the bit return spring to remove bolts or small screws. Since it is fixed all the time, the nut and bolt or machine screws do not rotate together, and the tightening force is reliably transmitted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows an embodiment of a bolt fastener according to the present invention.
Will be explained. The socket 14 is connected to the spindle shaft 28 of the hand tool and the power tool as shown in FIG.
Bearings 21 and 25 in 7 hold socket 14, pinion 23 and socket 14 are connected by a hexagonal shaft and a hole as shown in FIG. 3, and pinion 23 has washers 22 and 24 at both ends.
And gear 12 meshes with the gear 12 as shown in the figure. The gear 12 is connected to the socket 6 by a hexagonal shaft and a hole. As shown in FIG. 2, the socket 6 and the nut 5 are connected by a hexagonal portion of the nut to transmit the tightening force.

When tightening the nut 5 with the socket, the bolt fixing bit 7 provided inside the socket 6 engages with the groove portion of the bolt or the machine screw 1 as shown in FIG. 2, and the fixing bit 7 returns to the bit. It is fixed to the bit slide 18 through the spring 15 only in the rotational direction by a square shaft or the like as shown in FIG. Bit return spring 15 in the horizontal direction
Can be moved through. Therefore, even if the nut 5 is tightened and rotated by the socket 6 and moves to the left in FIG. 1, the fixing bit 7 follows the bit return spring 15 so that the bolt or machine screw 1 is always fixed, and the nut 5 and the bolt 5 are fixed. Alternatively, the small screws 1 do not rotate together, and the tightening force can be reliably transmitted and tightened. The snap ring 20 prevents the fixed bit 7 from slipping leftward by the bit return spring 15. The covers 9 and 17 are fixed with a tightening screw 8. The bit slide tool 18 is fixed to the cover 17 with a tightening screw 19. The cover 17 and the hand tool / power tool tip 29 are fixed by flange connection or clamp connection. 5 and 6 show the application example of FIG. 1 in which the connecting portion between the bolt or machine screw 1a and the fixing bit 7a is a hexagonal shaft and a hole. 7 to 9 show the application example of FIG. 1 in which the bolts or machine screws 1b are attached to the fastening members 2a and 3a.
Can be inserted from the right side of the washer 4a, and the inner and outer diameters of the washer 4a are elliptical, and the washer 4a moves in the state of FIG. Since the large diameter (long diameter) is larger than the through hole of the tightening member, it serves as a lock washer, so that the one-side tightening bolt can be tightened. (It is possible to insert from the right side and tighten from the right side.) The bolt or machine screws 1b can be inserted and tightened from one side without co-rotating from one side. The feature is that the tip of the bolt or the machine screw 1b is a square hole or a hexagonal hole, and the fixing bit 7b is a square head or a hexagon head according to the tip of the bolt and the machine screw 1b. ..

22, 24 are washers, 26 are pins, 27
Is an O-ring, 28 is a spindle shaft of a hand tool and a power tool, 29 is a bearing, and 23 is a pinion.
1a has a hexagonal head at the tip of bolts and machine screws 7a has a hexagonal groove provided on the bolt fixing bit in accordance with 1a. 7 to 9, reference numeral 1b denotes a bolt or machine screw that can be inserted into the fastening members 2a and 3a from the right side of FIG. 4a has an elliptical shape, and has a small diameter when the 2a and 3a are inserted, and the major axis is larger than the through hole diameter of the member in the state of FIG. The tip portion of 1b has a square hole or a hexagonal hole, and 7b has a square head or a hexagonal head according to 1b.

[0010]

According to the present invention, since the reaction force transmitted to the fixing bit can be reduced, it is possible to easily prevent the bolts or machine screws from being unfastened or co-rotating.

Further, when tightening screws having different screw diameters, the force can be easily increased or decreased by changing the gear ratio, which is very convenient.

[Brief description of drawings]

FIG. 1 is a side view showing a fastener for bolts or machine screws according to the present invention.

FIG. 2 is a sectional view taken along line I-I of FIG.

FIG. 3 is a sectional view taken along line II-II of FIG.

FIG. 4 is a sectional view taken along line III-III in FIG.

5 is a cross-sectional view showing a tip portion in the application example of FIG.

6 is a sectional view taken along line IV-IV in FIG.

7 is a cross-sectional view showing a state in which a bolt on one side is tightened in a blind hole in the application example of FIG.

FIG. 8 is a cross-sectional view showing a state where the tightening work is completed.

9 is a sectional view taken along line VV of FIG. 7.

[Explanation of symbols]

1 is bolts and machine screws, 2 and 3 are tightening members, 4
Is a washer, 5 is a nut, 6 is a socket, 7 is a bolt fixing bit, 8 is a tightening screw, 9 is a cover, 10 is a bearing,
11 is a washer, 12 is a gear, 13 is a washer, 14 is a socket, 15 is a bit return spring, 16 is a bearing,
Reference numeral 17 is a cover, 18 is a bit slide tool, 19 is a bolt, 20 is a retaining ring for preventing the bit from popping out, and 21 and 25 are bearings.

Claims (3)

[Claims] 1. A bolt fastener having a spindle shaft for transmitting power and a gear rotated by the spindle shaft, wherein a fixing bit is provided in a socket rotated by the gear. Bolt fasteners. 2. The bolt fastener according to claim 1, wherein a retaining ring is provided to prevent the fixing bit from coming off. 3. The bolt fastener according to claim 1, which can be easily increased or decreased by changing a gear ratio.