JPS639431Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bolt tightening tool for tightening a torque control bolt having a tip for shearing at the tip.

Conventionally, this type of bolt tightening tool is as shown in Fig. 10.
An inner socket 13 and an outer socket 14 are provided at the tip.

As described in U.S. Pat. No. 2,928,302, the inner socket 13 is attached to the shear tip 71 at the tip of the shaft of the torque control bolt 7 shown in FIG.
socket 1 by fitting the nuts 70 screwed into the
3 and 14, the tightening reaction force of the nut 70 is received by the bolt tip 71 via the inner socket 13, and the bolt tip 71 is sheared.

The bolt tightening tool mentioned above has a complicated internal structure and a large number of parts, and is made to be strong enough to withstand the strong force of shearing. When operated with one hand, it is difficult to maintain balance, which increases worker fatigue.

Further, since the force of the hand is concentrated on gripping the handle 3, it is inconvenient to operate the switch 31 provided on the handle 3.

Therefore, for example, a screw-in type auxiliary handle 4 is attached to the bolt tightening body 1 so that the handle can be operated with both hands.

However, depending on the tightening position of the bolt, the auxiliary handle 4 may get in the way, and in this case, the auxiliary handle 4 must be removed, which is troublesome.

In addition, the auxiliary handle 4 removed from the bolt fastener must always be carried together with the fastener main body 1, which is bulky and may be lost.

The present invention solves the above-mentioned inconveniences in bolt fasteners.The main handle 4 of the bolt fastener is provided with an auxiliary handle 4 that can be pulled out, and when the auxiliary handle is required, the weight is balanced with the main handle 3. When the auxiliary handle is not necessary, the auxiliary handle can be pulled out to the correct position and used.
It can be accommodated so that they overlap.

Therefore, there is no need to carry the auxiliary handle separately from the main body of the fastener, so there is no inconvenience when carrying it and there is no risk of losing the auxiliary handle.

The present invention will be specifically described below based on embodiments shown in the drawings.

As is well known, the bolt fastener main body 1 is constructed by attaching the case 1 to the base end of a cylindrical case 11 having an outer socket 14 and an inner socket 13 concentrically disposed at the tip.
A cylindrical body 15 is provided to protrude substantially perpendicularly to 1.

A differential speed reduction mechanism 12 is built into the cylindrical case 11, and an input shaft (not shown) of the speed reduction mechanism 12 is connected to a motor 16 disposed in the cylindrical body 15.
Two concentric output shafts (not shown) of No. 2 are connected to both the sockets 13 and 14.

A main handle 3 is protruded from the base end of the cylindrical case 11 of the bolt tightening tool main body 1 to the tip of the cylindrical body 15, and an activation switch 31 is provided on the main handle 3.

It goes without saying that the main handle 3 is located at a rear position relative to the center of gravity of the bolt fastener main body 1.

An auxiliary handle 4, which is a feature of the present invention, is provided on the cylindrical body 15 of the fastener body 1 so as to be able to be pulled out, and is set in either position of the two locking holes 23a, 23b provided at the front and rear of the body 1. Ru.

As shown in FIG. 5, the auxiliary handle 4 is composed of an auxiliary handle main body 5 having a U-shaped grip portion 51, and an opening prevention member 6 attached to the main body to prevent the grip portion 51 from opening.

The auxiliary handle body 5 is formed by bending a thick metal wire, and has an opening/closing rod 51 that constitutes a grip portion 51.
The upper ends of a and 51b are slightly bent outward and further bent in parallel in a plane perpendicular to the grip portion 51 to form a pair of clamping pieces 52 and 52.

The clamping pieces 52, 52 sandwich both side surfaces of the fastener main body 1, and the tips thereof are opposed and bent inward, and the protrusions 5 fit into the locking holes 23a, 23b of the fastener main body 1.
3,53 is formed.

The length of the grip portion 51 is slightly shorter than the length of the fastener body 1.

Furthermore, the length of the clamping pieces 52, 52 is such that the length of the protrusion 53 is the same as that of the main handle 3 of the fastener body 1, which will be described later, as shown in FIG.
When the grip part 51 is fitted into the locking hole 23b on the side
When the protrusions 53 are fitted into the locking holes 23a on the sockets 13 and 14 side of the fastener main body 1 as shown in FIG. Sufficient space is created between them to hold the grip part 51, and the grip part 51 is connected to the fastener main body 1.
It is determined to be located closer to the socket 14 than the center of gravity of the socket.

Furthermore, the distance between the protrusions 53, 53 at the tip of the auxiliary handle is approximately equal to the thickness between the slide guide portions 2, 2 on both sides of the fastener main body 1, which will be described later.

The opening prevention member 6 holds the locking plate 61 at the grip portion 51.
It is pivoted to one opening/closing rod 51a of the
The tip of the locking plate 61 is bent to form a claw piece 62 with a spring action, and while firmly grasping the grip portion 51 and narrowing the distance between both opening and closing rods 51a and 51b, the claw piece 62 is attached to the other opening and closing rod 51b. When pressed, the claw piece 62 opens and engages with the opening/closing rod 51b.

Cylindrical portion 1 of the fastener main body 1 to which the above-mentioned auxiliary handle 4 is attached
Slide guide parts 2, 2 parallel to the axis of the cylinder case 11 are formed facing each other on both sides of the connection part between the cylinder case 11 and the socket 1 of the guide parts 2, 2.
A guide piece 21 is provided protruding from the tip on the 3, 14 side.

The guide piece 21 has clamping pieces 52, 5 of the auxiliary handle 4.
A guide groove 22 into which the slide guide 2 is slidably fitted is opened in the direction of the slide guide section 2.

In addition, locking holes 23a and 23b are formed at both ends of each slide guide portion 2, 2, and the projections 53, 53 at the tips of the auxiliary handles are inserted into the locking holes, so that the auxiliary handle 4 can be held in place. This becomes a positioning section 23 for positioning.

However, in order to attach the auxiliary handle 4, the slide guide parts 2, 2 on both sides of the fastener body 1 are held between the two gripping pieces 52, 52 of the auxiliary handle 4, and the gripping pieces 52, 5 are
The protrusions 53, 53 at the two tips are opposed to the locking holes 23a, 23a on the socket side of the guide parts 2, 2, and the clamping pieces 52, 52 are opposed to the guide grooves 22, 22.

Grip the grip part 51 firmly with one hand to narrow the gap between the clamping pieces 52, 52, and place the clamping pieces 52, 52 in the guide grooves 22, 22, and the protrusions 53, 53 in the locking holes 2.
3a, 23a.

With the other hand, the claw piece 62 of the locking plate 61 is pressed against the mating opening/closing rod 51b to engage the claw piece 62 and the opening/closing rod 51b, thereby preventing the grip portion 51 and the clamping pieces 52, 52 from opening.

As a result, both the clamping pieces 52, 52 are connected to the locking hole 23.
The auxiliary handle 4 is fixed to the fastener main body 1 without coming off from the guide grooves 22, 22 and the guide grooves 22, 22.

The bolt tightening work is performed while holding the main handle 3 of the fastener with one hand, the auxiliary handle 4 with the other hand, and supporting the main body 1 of the fastener with both hands. In addition, since the auxiliary handle 4 and the main handle 3 are arranged in a well-balanced manner before and after the center of gravity of the fastener body 1, the bolt fastener can be easily handled in horizontal positions, upward positions, and other free working positions, and can be used for long periods. Workers experience less fatigue even when working for hours.

In addition, since the auxiliary handle 4 is securely fixed to the main body 1 by engaging with the guide grooves 22, 22 and the locking holes 23a, 23a, the auxiliary handle 4 does not wobble during work, and the bolt can be stably tightened. Fasteners can be used.

When tightening bolts in a narrow space where the auxiliary handle 4 becomes an obstacle, or when storing a bolt tightening tool, the auxiliary handle 4 is attached to the cylindrical body 15 of the main body 1.
Push it to the side.

In this operation, first, the locking plate 61 of the auxiliary handle 4 is opened to disengage the claw piece 62 and the opening/closing rod 51b.

Due to the elastic return of the metal wire, the grip portion 51 and the gap between the clamping pieces 52 and 52 expand to their original state, and the protrusions 53 and 53 at the tips of the clamping pieces 52 and 52 close to the locking holes 23.
a, it comes off from 23a.

Next, slide the slide guide parts 2, 2 of the main body 1, push the auxiliary handle 4 toward the main handle 3 side, make the protrusions 53, 53 of the auxiliary handle 4 face the rear locking holes 23b, 23b, and do the same as above. Grip the grip portion 51 and fit the protrusion 53 into the locking hole 23b, and the locking plate 61 prevents the grip portion 51 and thus the clamping pieces 52, 52 from opening.

Since the auxiliary handle 4 is fixed close to and overlaps the cylindrical body 15 of the main body 1, it is the same as if the auxiliary handle 4 was not attached, and there is no problem with tightening work in a narrow space.

If the auxiliary handle 4 is needed, the auxiliary handle 4 can be pulled out from the main body 1 in the reverse order to the above.

Figures 6 and 7 show the opening prevention member 6 of the auxiliary handle 4.
Fig. 6 shows another embodiment in which a flat ring 63 is slidably fitted across both opening/closing rods 51a, 51a of the grip portion 51, and when the ring 63 is lowered, both opening/closing rods 51a, 51a are slidably fitted. The gap between the clamping pieces 51a and 51b opens due to elastic return.

A retaining piece 64 is provided on the ring 63 to prevent it from falling off from the grip portion 51.

FIG. 7 shows a grip portion 51 in which a flat cylindrical body 65 is removably covered. In this case, the flat cylindrical body 65 is gripped during use, making it easy to grip.

FIG. 8 shows another embodiment of the auxiliary handle 4, in which the handle body 5 has both opening and closing rods 51 at the base end of the grip portion 51.
a and 51b are pivotally fixed, and one opening/closing rod 51
A hook piece 66 is pivotally fixed to the other opening/closing rod 51b.
A receiving portion 67 is formed in which the hook piece 66 engages and disengages.

In this case as well, the clamp body 1 is
After clamping, the hook piece 66 and the receiving piece 67 are engaged to prevent the clamping pieces 52, 52 from opening.

In addition, when implementing the present invention, the positioning part 23 that determines the pull-out position and push-in position of the auxiliary handle 4 is used.
is not limited to the locking holes 23a, 23b as described above, but the protrusions 23c, 2 as shown in FIG.
3D is also possible.

In this case, the tip of the clamping piece 52 of the auxiliary handle 4 is provided with a receiving hole 54 that fits into the protrusions 23c and 23d.

As described above, the present invention allows you to immediately pull out the auxiliary handle 4 from the main body 1 when necessary, grasp the auxiliary handle 4 and the main handle 3, and stably support the bolt tightening tool 1 with both hands. Easily adapts to any tightening position of the fastener.

Further, since the auxiliary handle 4 can be pushed in so as to overlap the fastener main body 1, the auxiliary handle 4 does not get in the way even during bolt tightening work in a narrow space.

Furthermore, since the auxiliary handle 4 does not need to be separated from the fastener main body 1, it is convenient to carry, and the auxiliary handle does not get lost.

Further, the auxiliary handle 4 can be easily and inexpensively made by bending a metal wire, and a significant increase in cost can be suppressed.

It should be noted that the present invention is not limited to the above-mentioned configuration, and it goes without saying that various modifications can be made within the technical scope of the claims of the utility model registration.

[Brief explanation of the drawing]

Fig. 1 is a slope view of the bolt fastener, Fig. 2 is a front view of the bolt fastener with the auxiliary handle accommodated, and Fig. 3 is a front view of the bolt fastener with the auxiliary handle pulled out. Figure 4 is a sectional view along the line of Figure 2, Figure 5 is a slope view of the auxiliary handle, Figures 6 and 7.
8 is a perspective view showing another embodiment of the auxiliary handle, FIG. 9 is a perspective view of another embodiment of the positioning part,
Figure 10 is a front view of a conventional bolt fastener;
Figure 1 is a front view of the torque control bolt. 1...Bolt fastener body, 11...Cylinder case,
15... cylinder body, 3... main handle, 4... auxiliary handle,
51... Grip part, 52... Clamping piece.

Claims (1)

[Scope of claims for utility model registration] Outer socket 14 into which the nut is fitted;
Inner socket 13 into which the bolt tip fits
A bolt fastener main body 1 has a cylindrical body 15 protruding from the base end of a cylindrical case substantially perpendicular to the cylindrical case 11.
, a main handle 3 fixed to the main body 1, and a cylindrical body 1.
The cylindrical body 1 is provided with a grip portion 51 substantially parallel to the cylindrical body 1.
5 toward the sockets 13 and 14, and is removably engaged with the positioning portions 23 and 23 formed in the fastener body 1, and is clampable at the pulled-out end and the pushed-in end. A bolt tightening tool consisting of an auxiliary handle 4 attached to 1. The auxiliary handle 4 includes a clamping piece 52 attached to the upper part of the cylinder 15 and a grip part 5 connected to the clamping piece 52.
1, and an opening prevention member 6 that is removably attached to the auxiliary handle body 5 and prevents the two gripping pieces 52, 52 of the auxiliary handle body 5 from opening. A bolt fastener according to Claim 1 of the Utility Model Registration Claim. The positioning portion 23 is a locking hole 23a, 23b formed in the bolt fastener main body 1, and the ends of the clamping pieces 52, 52 of the auxiliary handle main body 5 can be engaged with the locking holes 23a, 23b. The bolt fastener according to claim 2, which is bent inwardly from each other. The positioning portion 23 is protrusions 23c and 23d formed on the bolt fastener main body 1, and both clamping pieces 52 and 52 of the auxiliary handle main body 5 have receiving holes at their tips into which the protrusions 23c and 23d can be inserted. 54. The bolt fastener according to claim 2 of the utility model registration claim. The bolt fastener according to any one of claims 2 to 4, wherein the auxiliary handle body 5 is integrally formed by bending a metal wire. The auxiliary handle main body 5 has two opening/closing rods 51a, 51 which are pivoted at the base end of the grip part 51 to freely open and close.
The bolt fastening tool according to any one of claims 2 to 4, which is formed with protruding clamping pieces 52, 52 on the portion b. The bolt tightening tool according to any one of claims 2 to 6, wherein the opening prevention member 6 is a flat cylinder 65 that is detachably fitted into the grip portion 51. The bolt tightening tool according to any one of claims 2 to 6, wherein the opening prevention member 6 is a flat ring 63 that is slidably fitted into the grip portion 51. The opening prevention member 6 is configured to prevent one opening/closing rod 5 of the opposing opening/closing rods 51a and 51b of the grip portion 51.
1a, the locking plate 61 is provided with a claw piece 62 at its tip that can be engaged with and detached from the mating opening/closing rod 51b. Fittings.