JP2003145438A - Fastening tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening tool capable of performing a work of fastening or unfastening even without rotating a handle body when a working space is especially limited upon maintenance inspection of a piping work or an automobile. SOLUTION: When rotating device 6 is rotated through a rotating lever 63, rotation is practicable in linkage with rotation of the rotating lever 63. A coupling member 42 is to be coupled to a jig 21 and first and second transmission means 62 and 41 consist of two bevel gears. Engagement between an one direction lock device 5 and respective braking rings 7 for two attitudes is one direction lock engagement by a ratchet lock mechanism consisting of a ratchet 71 and claws 51 and 52. When the rotating device 6 is rotated by this constitution through the rotating lever 63, the coupling member 42 is rotated through interlocking of an interlocking device 4, and by rotating a fastening body 22, such as, a hexagonal bolt held at a jig 21 through the jig 21, either of a fastening work and a release work opposed thereto can be carried out.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a tightening tool,
In particular, the present invention relates to a tightening tool for holding a tightening body such as a hexagonal bolt or a nut with the aid of a jig and then tightening the tightening body to a predetermined position of an object to be tightened or releasing the tightening.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional ratchet type tightening tool 1. Suitable jig 1 as shown
1 is connected to the ratchet type tightening tool 1, and then the handle body 10 of the ratchet type tightening tool 1 is rotated, whereby a tightening body 12 such as a hexagon bolt or nut is passed through the jig 11. The tightening work or the tightening release work can be performed. Such a ratchet type tightening tool 1 rotates the handle body within an appropriate rotation stroke range during work, like a simple tightening tool such as a conventional spanner,
When the rotation limit is reached, it is not necessary to remove the entire tightening tool from the tightening body 12 such as hexagon bolts or nuts and return it to the starting end of the rotation stroke again. The handle body 10 can be reciprocally rotated within the above-described appropriate rotation stroke range.

However, for example, when the work space is particularly narrow at the time of plumbing work or maintenance and inspection work of an automobile, not only the manual work in the narrow space is very cramped, but also the turning angle of the handle body is limited. Therefore, there is a drawback that the range of strokes that can be rotated becomes small, and it is necessary to carry out a lot of fine rotation operations.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, a first object of the present invention is to rotate the handle body even if the working space is particularly narrow during piping work or maintenance inspection of the automobile. An object of the present invention is to provide a tightening tool which can also perform tightening work or tightening release work.

A second object of the present invention is to provide a tightening tool which can achieve the first object and can also perform a tightening operation or a tightening releasing operation through the handle body. To try to provide.

[0006]

In order to achieve the above object, the present invention is to hold a tightening body with the aid of a jig and then tighten the tightening body at a predetermined position of a tightened object. A tightening tool for releasing tightening, comprising: a lever member having a through hole provided in the axial direction and having openings formed at both front and rear ends; and a lever member connected to a front end of the lever member. And a handle member formed of a head member in which a storage chamber communicating with the through hole is formed, and the handle member is rotatably disposed in the through hole of the lever member so that both front and rear ends are located in the opening of the lever member. The shaft body, the first transmission means that is attached to the front end of the shaft body so as to project into the housing chamber and rotate with the rotation of the shaft body, and the opening on the rear end side of the lever member. Located outside the front and A rotary device that is attached to the rear end of the shaft body and that rotates the shaft body; and a rotary device that is arranged in the storage chamber such that the rotation axis line forms a predetermined angle with the longitudinal direction of the lever member, and A second transmission means that engages with the first transmission means and rotates in association with the rotating device by rotation of the rotary lever; and from the second transmission means along the rotation axis of the second transmission means. Is projected,
An interlocking device comprising a connecting member connectable to the jig, and by rotating the rotary lever,
The shaft of the rotating device, the first transmission means, and the interlocking device are rotated, and the tightening body held by the jig through the jig is rotated to rotate the tightening body. To provide a tightening tool characterized by being tightened or released.

With the above construction, the tightening work and the unclamping work of the tightening tool of the present invention can be easily carried out by continuous rotation of the rotating device instead of frequent reciprocal rotation of the handle body. it can. That is, by rotating the rotary lever, the shaft body and the first member of the rotary device are rotated.
And the interlocking device are rotated, and the tightening body held by the jig is rotated through the jig to perform the tightening of the tightening body and the release opposite thereto. it can.

Further, in the tightening tool of the present invention, at the time of working, the end portion of the handle body having the rotary lever can be extended out of the cramped working space, so that the rotation angle of the rotary lever is not limited. If the work space is narrow during piping work or maintenance / inspection of an automobile, the tightening work or the tightening release work can be easily performed by rotating the rotary lever outside the narrow space. The tightening body mentioned here is not particularly limited, and hexagonal bolts, octagonal bolts and nuts can be applied. The first and second transmission means are not particularly limited, and a bevel gear, a friction wheel, a worm, and a worm gear can be used.

Further, in the accommodating chamber of the head member, further, along the rotation axis of the second transmission means of the interlocking device, is opposite to the projecting direction of the connecting member from the second transmission means. The braking wheel projecting in the direction and one of the first attitude and the second attitude can be selected to engage with the braking wheel in that attitude, and When engaged with the braking wheel in the above posture, the interlocking device is rotated only in one direction, and when engaged with the braking wheel in the second posture, the interlocking device is rotated in the opposite direction to the one direction. And a one-way stop device configured to rotate only to, and restricting rotation of the lever member in a direction opposite to tightening or rotation in the releasing direction by the one-way stop device, Continuously tightening or releasing Preferably so as to be fit with or possible its release operation.

As a result, the reaction rotation due to the rotation of the lever member of the interlocking device in the predetermined direction is restricted by the one-way stop device, and after the tightening work is performed via the rotary lever, The tightening work via the lever member becomes possible, and after the tightening release work via the lever member, the tightening release work via the rotary lever becomes possible. Of course, the tightening operation or the tightening releasing operation can be performed using only the lever member. That is, the tightening tool of the present invention is capable of performing the tightening work or the tightening release work via the rotary lever, and at the same time, performing the tightening work or the tightening release work via the lever member. You can also Further, the braking wheel mentioned here is not particularly limited, and both ratchet wheels and friction wheels are adopted, that is, the engagement of the one-way stop device with the braking wheel in each of the two postures is one-way stop by the ratchet stop mechanism. Engagement may be used, or engagement of another one-way stopper such as a friction wheel stopper mechanism may be used.

The two of the one-way stop devices
When engagement with the brake wheel in each of the postures is performed by a ratchet stop mechanism, the ratchet stop mechanism locks the ratchet wheel formed on the peripheral wall of the brake wheel and the ratchet wheel in the accommodation chamber in one direction. Preferably, the spring loaded pawl is arranged so that

Further, the ratchets for taking the two positions of the one-way stop device are the same, and between the two spring-loaded claws corresponding to the two positions of the one-way stop device, respectively. A cam body is provided so as to oppose the spring force of each of the two spring-loaded pawls, and the cam body is actuated by a selection lever provided on the head member outside the storage chamber to operate as described above. It is configured to rotate so as to exhibit one of two postures, a first posture and the second posture, and to stop the ratchet wheel in one direction by one of the two spring-loaded pawls. Is preferred.

The first transmission means and the second transmission means are composed of two bevel gears meshing with each other, and the axis of the interlocking device is substantially perpendicular to the axial direction of the lever member. Are preferably arranged so that

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the tightening tool of the present invention will be described in detail below. In the following description, components having substantially the same function and configuration will be denoted by the same reference numeral regardless of their size, and redundant description will be given only when necessary.

FIG. 1 is a partially cutaway exploded perspective view showing a preferred embodiment of a tightening tool of the present invention and a relationship between the tightening tool and a tightening body, and FIG. 2 is a sectional view showing the embodiment.
FIG. 3 is a partial side view showing the embodiment. As shown in FIG. 1, this tightening tool holds a tightening body 22 such as a hexagon bolt with the aid of a jig 21 and then holds the tightening body 22.
Is for tightening or releasing the tightening to a predetermined position of an object to be tightened (not shown). First, the tightening tool includes a handle body 3 as a main body. The handle body 3 is provided with a through hole 313 in the axial direction and has a lever member 31 having openings 311 and 312 at both front and rear ends.
And a head member 32 that has an accommodation chamber 321 that is connected to the one end 311 of the opening of the lever member 31 and that is connected to the through hole 313 of the lever member 31. Containment room 3
A through hole 325 is formed in the bottom surface of 21. The rotating device 6 is provided so as to penetrate the through hole 313 of the handle body 3. The rotating device 6 is shown in FIG.
As shown in FIG. 3, it comprises a shaft 61, a first transmission means 62 and a rotary lever 63.

Both ends 611 and 612 of the shaft body 61 have openings 311 and 31 at the front and rear ends of the lever member 31, respectively.
It is rotatably arranged in the through hole 313 of the lever member 31 so as to be adjacent to the position 2.

The first transmission means 62 projects into the accommodating chamber 321 and is adjacent to the opening 311 on the front end side of the lever member 31 of the shaft body 61 so that it can rotate together with the rotation of the shaft body 61. It is provided in.

The rotating lever 63 is located outside the opening 312 on the rear end side of the lever member 31, and when the shaft lever 61 is rotated, the shaft member 61 is also rotated. An end 612 corresponding to the opening 312 on the rear end side
It is provided in.

The interlocking device 4, the braking wheel 7, and the one-way stopping device 5 are arranged in the accommodation chamber 321 of the head member 32.

The interlocking device 4 comprises a second transmission means 41 and a connecting member 42. The second transmission means 41 is
It has a substantially disc-like shape with two upper and lower surfaces (based on the azimuths in FIGS. 1 and 2), and its axis is parallel to the longitudinal direction of the lever member 31.
It is arranged in the accommodation chamber 321 so as to form 0 degree, and engages with the first transmission means 62 along the substantially disk-shaped peripheral edge on the lower surface side,
Moreover, when the rotating device 6 is rotated via the rotating lever 63, the rotating device 6 is arranged to be rotated in association with the rotation of the rotating lever 63. The connecting member 42 is for connecting to the jig 21, and is upward from the substantially disk-shaped substantially central portion of the upper surface along the axis line to the housing chamber 321.
It sticks out. In this embodiment, the first transmission means 62 and the second transmission means 41 are composed of two bevel gears meshing with each other.

The braking wheel 7 closes the through hole 352 and is opposite to the protruding direction of the connecting member 42 from the substantially central portion of the lower surface of the interlocking device 4 which is substantially disk-shaped so as to be rotatable around the axis. The ratchet wheel 71 (see FIGS. 4 and 5) is formed on the peripheral wall of the ratchet wheel 7, and the braking wheel 7 is a ratchet wheel.

The one-way stop device 5 comprises two spring-loaded claws 51 and 52 and a cam body 55 arranged between the two spring-loaded claws 51 and 52. As shown in FIG. 3, the cam body 55 is moved to the first position as shown in FIG. 4 and the first position as shown in FIG. 5 by the operation of the selection lever 56 provided on the head member 32 outside the housing chamber 321. The two spring-loaded claws 51, which are rotated so as to exhibit one of the two postures.
The claw wheel 71 is configured to be stopped in one direction by the corresponding claws 52. The ratchet wheel 7 of the braking wheel 7 in the first posture as shown in FIG.
1, the interlocking device 4 is rotated only in the counterclockwise direction, and the ratchet wheel 7 of the braking wheel 7 is rotated in the second posture as shown in FIG.
When engaged with 1, the interlocking device 4 is restricted from rotating clockwise only. That is, the engagement of the one-way stop device 5 with the braking wheel 7 in each of the two postures is performed by the ratchet wheel 71.
It is the engagement of the one-way stop by the ratchet stop mechanism that is composed of and the claws 51 and 52. As a result, when the rotating device 6 is rotated via the rotating lever 63, the connecting member 42 is rotated by the interlocking of the interlocking device 4, and the hexagon bolt or the like held by the jig 21 via the jig 21. It is possible to rotate the tightening body 22 to perform either the tightening work or the releasing work opposite thereto.

The operation of performing the tightening work and the opposite releasing work using the tightening tool of the present invention will be described in detail below. When performing the tightening work, first, the selection lever 56 is rotated to present the cam body 55 in the first posture as shown in FIG. 4, and then the appropriate jig 21 is attached to the connecting member 42 of the interlocking device 4. Link. Then, by rotating the rotary lever 63 in the clockwise direction as viewed from the direction of the arrow A in FIGS.
It is possible to perform the tightening work by rotating the tightening body 22 such as a hexagon bolt held by the jig 21 through the jig 21 by rotating it counterclockwise as viewed from the direction. In addition, the counterclockwise rotation of the interlocking device 4 due to the counterclockwise rotation of the lever member 31 prevents the one-way stop device 5 from rotating.
After the tightening work is performed via the rotary lever 63, the lever member 31 may be further slightly rotated counterclockwise as viewed from the direction of arrow B in FIG. 2 to perform a further tightening work. it can. That is, according to the tightening tool of the present embodiment, the tightening work is continued by the pre-tightening by the rotation of the rotary lever 62 and the fine tightening of the lever member 31 only once or twice. It can be performed easily by being divided into two stages: tightening to tighten the tightening body more firmly. On the other hand, when performing a releasing operation opposite to the above-mentioned tightening, first, the selection lever 56 is rotated to present the cam body 55 in the second posture as shown in FIG.
The lever member 31 is slightly rotated clockwise as viewed from the direction of arrow B in FIG. 2 to release the tightening. Here, similarly to the above, the counterclockwise reaction rotation due to the clockwise rotation of the lever member 31 of the interlocking device 4 is stopped by the one-way stop device 5, so that the tightening is released by the rotating lever 63. be able to. After releasing the tightening, subsequently, by rotating the rotary lever 63 in the counterclockwise direction viewed from the direction of arrow A in FIG. 2, the connecting member 42 is interlocked and viewed from the direction of arrow B in FIG. It is possible to perform the releasing operation by rotating the tightening body 22 such as a hexagon bolt held by the jig 21 through the jig 21 by rotating it in the clockwise direction. That is, according to the tightening tool of the present embodiment, the lever member 31 is finely rotated only once or twice to release the tightening of the tightening body from the primary release and the rotary lever 62 is rotated to release the secondary release. It can be done easily by dividing it into two stages.

[0024]

As described above, according to the tightening tool of the present invention, at the time of working, the end portion of the handle body having the rotary lever can be extended to the outside of the cramped working space. There is no restriction on the rotation angle, and when the work space is narrow during piping work or vehicle maintenance / inspection, the work to tighten or release the tightening work can be done easily by rotating the rotating lever outside the narrow space. be able to.
Moreover, since the rotation by the rotary lever can be combined with the rotation by the conventional handle body, the tightening work or the tightening release work can be further facilitated.

The embodiments described above are intended only to clarify the technical contents of the present invention, and the present invention is not construed in a narrow sense limited to such specific examples. The present invention can be implemented with various modifications within the spirit of the present invention and the scope described in the claims.

[Brief description of drawings]

FIG. 1 is a partially broken exploded perspective view showing a preferred embodiment of a tightening tool of the present invention and a relationship between the preferred embodiment and a tightening body.

FIG. 2 is a sectional view of the embodiment.

FIG. 3 is a partial side view of the embodiment.

FIG. 4 is an explanatory diagram when the cam body takes the first posture in the embodiment.

FIG. 5 is an explanatory diagram when the cam body takes the second posture in the embodiment.

FIG. 6 is a perspective view of a conventional tightening tool.

[Explanation of symbols]

21. ． ． jig 22. ． ． Fastening body 3. ． ． Handle body 31. ． ． Lever member 32. ． ． Head member 321. ． ． Containment room 6. ． ． Rotating device 61. ． ． Shaft 62. ． ． First transmission means 63. ． ． Rotating lever 4. ． ． Interlocking device 41. ． ． Second transmission means 42. ． ． Connecting member 7. ． ． Brake wheel 5. ． ． One way stop device 51, 52. ． ． Claw with spring 55. ． ． Cam body 56. ． ． Selection lever

Claims (6)

[Claims] 1. A tightening tool for holding a tightening body with the aid of a jig and then tightening the tightening body to a predetermined position of a tightened object or releasing the tightening, the shaft comprising: A lever member provided with a through hole in the direction and having openings formed at both front and rear ends, and connected to the front end of the lever member,
Also, a handle body including a head member in which a storage chamber is formed that communicates with the through hole of the lever member, and is rotated in the through hole of the lever member such that both front and rear ends are located in the opening of the lever member. A shaft member that is movably arranged, a first transmission means that is attached to the front end of the shaft member so as to project into the accommodation chamber, and that can rotate with the rotation of the shaft member; and a rear end of the lever member. A rotation device that is located outside the opening on the side and that includes a rotation lever that is attached to the rear end of the shaft body and rotates the shaft body; and a rotation axis that forms a predetermined angle with the longitudinal direction of the lever member. Second transmission means, which is arranged in the storage chamber so as to engage with the first transmission means, rotates by the rotation of the rotation lever in conjunction with the rotation device, and the second transmission means. Times of means An interlocking device that is provided so as to project from the second transmission means along an axis and that includes a connecting member that can be connected to the jig. By rotating the rotating lever, the shaft body of the rotating device is provided. And rotating the first transmission means and the interlocking device, and rotating the tightening body held by the jig through the jig to tighten or release the tightening body. The tightening tool characterized in that 2. The head member is further provided in the accommodating chamber in a direction opposite to a protruding direction of the connecting member from the second transmission means along a rotation axis of the second transmission means of the interlocking device. The braking wheel projecting in the direction and one of the first attitude and the second attitude can be selected to engage with the braking wheel in that attitude, and When engaged with the braking wheel in the above posture, the interlocking device is rotated only in one direction, and when engaged with the braking wheel in the second posture, the interlocking device is rotated in the opposite direction to the one direction. And a one-way stop device configured to rotate only to, and the rotation of the lever member in the direction opposite to the tightening or the rotation in the releasing direction thereof is restricted by the one-way stop device, Tightening or tightening continuously in the releasing direction Or tightening tool according to claim 1, characterized in that it becomes possible that a release operation. 3. The tightening tool according to claim 2, wherein engagement with the brake wheel in each of the two postures of the one-way stop device is configured to be performed by a ratchet stop mechanism. 4. The ratchet stop mechanism comprises a ratchet wheel formed on a peripheral wall of the braking wheel and a spring-loaded claw arranged to stop the ratchet wheel in one direction in the storage chamber. The tightening tool according to claim 3, wherein: 5. A pawl wheel for taking the two positions of the one-way stop device is the same, and a cam body is provided between two spring-loaded pawls corresponding to the two positions of the one-way stop device. Is provided so as to oppose the spring force of each of the two spring-loaded claws, and the cam body is actuated by a selection lever provided on the head member outside the accommodating chamber to operate the first lever. And one of the two postures, that is, one of the two spring-loaded pawls is used to stop the ratchet wheel in one direction. The tightening tool according to claim 4, which is characterized in that. 6. The first transmission means and the second transmission means are constituted by two bevel gears meshing with each other,
The tightening tool according to any one of claims 1 to 5, wherein the interlocking device is arranged such that its axis is substantially perpendicular to the axial direction of the lever member.