JP2004358604A - Torque wrench - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a torque wrench which allows working in a small space by using a wrench part like a spanner or a monkey wrench by reversing its front and back at 180° without spoiling a function of a fastening torque sensitive information mechanism. <P>SOLUTION: This torque wrench is furnished with the fastening torque sensitive information mechanism 5 to inform that a wrench part 3 fastens a rotating fastening member 2 to be at a set specified torque value by providing the wrench part 3 to be engaged with the rotating fastening member 2 such as a bolt, a nut, etc. on a head end part of a handle body 1. The wrench part 3 is constituted so that an opposing wrench surface 3A roughly in parallel with the lengthy direction of the handle body 1 of this wrench part 3 is not in parallel with but inclined against the lengthy direction of the handle body 1, and a reversal connecting and disconnecting mechanism 4 for connecting and disconnecting this wrench part 3 free to install reversely rear side out at 180° against the handle body 1 by manual operation is furnished. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a torque wrench.
[0002]
Problems to be solved by the prior art and the invention
Generally, a spanner or a monkey wrench is provided in a state where a wrench portion is inclined with respect to a handle body.
[0003]
Specifically, for example, in the case of a wrench, the wrench is configured such that the direction of engagement of the wrench with the bolt or nut from the side is inclined by about 15 ° with respect to the length direction of the handle body (FIG. 9). This allows continuous rotation in a narrow space.
[0004]
That is, for example, with a hexagonal bolt or nut, the wrench portion can be locked only at a multiple of 60 ° with respect to a predetermined position. The wrench must be turned at least 60 °, but if the wrench is tilted by about 15 °, the wrench is turned 180 ° upside down after turning the handle about 30 °, and locked again with bolts and nuts. Thus, the rotating operation can be continuously performed while the handle body is located at the work start position.
[0005]
That is, the configuration is such that the hexagonal bolt and nut can be continuously rotated as long as there is a working space of about 30 °.
[0006]
On the other hand, conventionally, a torque wrench provided with a tightening torque sensitive notification mechanism 5 for notifying that a bolt or a nut or the like has been tightened to a set predetermined torque value has been implemented.
[0007]
Specifically, for example, as shown in FIG. 9, a wrench arm body 10 having a wrench part 3 (spanner shape in the drawing) is rotatable via a support shaft 6 at the tip of a pipe-shaped handle body 1. One end of the toggle link 7 is connected to the end of the wrench arm body 10 opposite to the wrench 3, and the other end of the toggle link 7 is connected to the elastic body (compression spring) 9 to always return elasticity. When a predetermined torque is applied to the wrench 3 when the handle body 1 is rotated in a direction in which the rotary tightening member 2 locked to the wrench 3 is tightened, the structure is connected to the receiving slide 8. The wrench arm body 10 rotates about the support shaft 6 against the urging force of the elastic body 9, and a striking portion 10A formed near the base end of the wrench arm body 10 forms an inner wall of the pipe-shaped handle body 1. And a notification sound is emitted.
[0008]
In general, a torque wrench is configured to be able to exert the effect of the tightening torque sensing and notification mechanism 5 only in a rotation operation in one direction, that is, only in a rotation direction in which bolts and nuts are tightened.
[0009]
Conventionally, this torque wrench also has a structure in which the wrench portion 3 is inclined with respect to the handle body 1, such as the above-mentioned spanner or adjustable wrench.
[0010]
However, with a torque wrench having a configuration in which the wrench 3 is inclined, continuous rotation can be performed in a narrow work space, but as described above, the tightening torque sensing and notification mechanism 5 is rotated in one direction. If the wrench 3 is turned upside down by 180 ° to perform the rotation operation, the rotation direction of the handle body 1 will be reversed, and the tightening torque sensitive notification mechanism 5 will not function.
[0011]
Therefore, in the conventional torque wrench, in order to make the tightening torque sensitive notification mechanism 5 function reliably, the wrench cannot be used in a reversed manner like a spanner or a monkey wrench, and at least a hexagonal bolt or nut is used. In order to rotate the handle, a work space for rotating the handle body 1 by 60 ° is required, and there is a problem that the work cannot be practically used for work in a place narrower than the work space.
[0012]
In view of the above situation, the present invention enables an operation in a small space by using a wrench 180 ° upside down like a spanner or a monkey wrench, without impairing the function of the tightening torque sensitive notification mechanism. This is to provide a periodical torque wrench.
[0013]
[Means for Solving the Problems]
The gist of the present invention will be described with reference to the accompanying drawings.
[0014]
A wrench 3 for engaging a rotary tightening member 2 such as a bolt or a nut is provided at the tip of the handle body 1, and the wrench 3 tightens the rotary tightening member 2 until a predetermined torque value is set. In the torque wrench provided with the tightening torque sensitive notification mechanism 5 for notifying the fact, the wrench portion 3 has an opposing wrench surface 3A substantially parallel to the length direction of the handle body 1 of the wrench portion 3. The wrench 3 is configured to be inclined so as not to be parallel to the length direction, and is provided with a reversing attachment / detachment mechanism 4 which can attach / detach the wrench portion 3 to / from the handle body 1 by manual operation so that the wrench 3 can be turned upside down. And a torque wrench.
[0015]
The wrench 3 is configured such that the direction of engagement of the wrench 3 with the rotary tightening member 2 from the side is inclined with respect to the length direction of the handle body 1. A torque wrench according to claim 1.
[0016]
Further, a release operation unit 11 is provided for releasing the mounted state of the wrench unit 3 and the handle body 1 by the reversing attachment / detachment mechanism 4. The wrench can be manually released by the release operation unit 11 without using a tool or the like. The torque wrench according to any one of claims 1 and 2, wherein the portion (3) is configured to be separable from the handle body (1).
[0017]
4. The torque wrench according to claim 3, wherein the release operation unit 11 is configured to be capable of releasing the mounted state by the reversing attachment / detachment mechanism 4 by performing a push operation.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention (how to implement the invention) will be briefly described with reference to the drawings, showing the operational effects thereof.
[0019]
The wrench portion 3 is configured such that the opposing wrench surface 3A that is substantially parallel to the length direction of the handle body 1 is not parallel to the length direction of the handle body 1 and is inclined. If the angle of inclination of the handle body 3 with respect to the length direction is set in the same manner as a conventional spanner or adjustable wrench, the handle body 1 can be used even in a narrow place by inverting the wrench 3 by 180 °. It can be rotated continuously.
[0020]
Further, according to the present invention, the wrench 3 can be easily separated from the handle 1 by a manual operation via the reversing attachment / detachment mechanism 4, and the separated wrench 3 is turned upside down by 180 ° and mounted on the handle 1 again. can do. That is, for example, in a case where the opposed wrench surface 3A is inclined by + 15 ° with respect to the length direction of the handle body 1, the wrench portion 3 is mounted 180 ° upside down, thereby turning the opposed wrench surface 3A. Is switched so as to incline by about −15 ° with respect to the length direction of the handle body 1.
[0021]
Therefore, when the wrench 3 together with the handle body 1 is turned upside down by 180 ° in a work in a narrow place, the tightening torque sensitive notification mechanism 5 functions only for rotation in one direction, so that it functions as a torque wrench. However, according to the present invention, only the wrench body 3 can be turned upside down by 180 ° with respect to the handle body 1 without turning the handle body 1 upside down by 180 °. By repeatedly turning and turning the angle to separate the wrench part 3 and reversing the work, it is possible to operate the handle body 1 in a direction in which the tightening torque sensitive notification mechanism 5 functions, and to work even in a narrow work space. An extremely practical torque wrench that can be used.
[0022]
Also, for example, if the wrench portion 3 is configured such that the direction of engagement of the wrench portion 3 with the rotation fastening member 2 from the side is inclined with respect to the length direction of the handle body 1, It is possible to configure a torque wrench provided with a wrench part 3 of a wrench type or a monkey wrench type that reliably exerts the above-described functions and effects.
[0023]
Further, for example, a release operation unit 11 for releasing the mounted state of the wrench unit 3 and the handle body 1 by the reversing attachment / detachment mechanism 4 is provided, and a tool or the like is used by manually releasing the release operation unit 11. If the wrench 3 is configured to be detachable from the handle body 1, the operation of releasing the reversing mechanism 4 can be easily performed by a simple manual operation, which is more practical.
[0024]
Further, for example, if the release operation unit 11 is configured to be able to release the mounting state by the reversing attachment / detachment mechanism 4 by performing a push operation, the wrench unit 3 is simply operated by pressing the release operation unit 11. Can be separated from the handle body 1, so that the separation operation can be performed very easily, and it becomes more practical.
[0025]
【Example】
A specific embodiment of the present invention will be described with reference to the drawings.
[0026]
The details of the torque wrench of this embodiment are omitted because they are the same as those in the section of the prior art.
[0027]
An arrow 16 indicating the turning direction of the handle 1 for operating the tightening torque sensitive notification mechanism 5 is engraved on the side surface of the handle 1.
[0028]
In the wrench portion 3 (spanner type) of the present embodiment, the opposing wrench surface 3A of the wrench portion 3 that is substantially parallel to the length direction of the handle body 1 is not parallel to the length direction of the handle body 1 and is inclined. It is configured as follows.
[0029]
Specifically, the direction of engagement of the wrench portion 3 with the rotary tightening member 2 using the nut from the side, that is, the direction of engagement of the rotary tightening member 2 such as a bolt or a nut from the icicle surface direction is determined by the handle. The body 1 (the wrench arm body 10) is configured to be inclined by about 15 ° with respect to the length direction (see FIG. 9).
[0030]
In other words, the C-shaped opening of the wrench portion 3 is formed so as to face one side of the length direction of the handle body 1, and the wrench portion 3 and the handle body 1 are connected to a conventional wrench or monkey wrench. Like the wrench part, it is configured so as to be bent in a letter shape.
[0031]
In addition, the present embodiment is provided with a reversing attachment / detachment mechanism 4 which can attach / detach the wrench part 3 to / from the handle body 1 so that the wrench part 3 can be turned upside down 180 degrees.
[0032]
Specifically, a first connecting portion 12 is provided at a base end of the wrench portion 3, and a second connecting portion 13 which is detachably connected to the first connecting portion 12 is provided at a distal end portion of the wrench arm body 10. ing. That is, in this embodiment, the wrench 3 is provided so as to be detachable from the distal end portion of the handle body 1 via the wrench arm body 10.
[0033]
The first connecting portion 12 is formed by attaching a cylindrical portion to the base end portion of the wrench portion 3, and a cylindrical portion having a diameter slightly smaller than the inner diameter of the first connecting portion 12 protrudes from the distal end portion of the wrench arm body 10. The cylindrical portion is used as a second connecting portion 13 to be fitted and inserted into the first connecting portion 12 (see FIGS. 1 and 2).
[0034]
On the side surface of the second connecting portion 13, a locking projection 14, which is protruded and urged by an elastic body (not shown), is provided so as to be immersed therein, and a locking recess which is locked by the locking projection 14. 15 are provided one by one on the opposed inner surface of the cylindrical first connecting portion 12.
[0035]
That is, when the second connecting portion 13 is inserted into the first connecting portion 12, the locking convex portion 14 is pressed into the inner surface of the first connecting portion 12 so as to be immersed. When the position coincides with the position 15, the locking projection 14 protrudes and locks into the locking recess 15 so that the first connecting portion 12 (wrench portion 3) and the second connecting portion 13 (wrench arm body 10) are prevented from coming off. And the first connecting portion 12 and the second connecting portion 13 can be separated from each other when the locking convex portion 14 is immersed against the urging force and is disengaged from the locking concave portion 15. .
[0036]
In this embodiment, the wrench 3 is engaged with the locking projection 14 only when the wrench 3 is in the normal mounting state (the state shown in FIG. 3) or the inverted mounting state (the state shown in FIG. 4). It is configured so that the recess 15 is locked to be in a retaining state.
[0037]
Specifically, a fitting groove 12A having a length along the facing direction of the left and right facing wrench surfaces 3A of the wrench portion 3 is formed at the bottom of the first connecting portion 12, and fitted into the fitting groove 12A. An elliptical fitting plate 13A is formed at the base of the second connecting portion 13, the second connecting portion 13 is inserted into the first connecting portion 12, and the fitting plate 13A is inserted into the fitting groove 12A. By fitting, the first connection portion 12 is positioned without rotating with respect to the second connection portion 13 (without rotating the wrench body 3 around the longitudinal direction of the handle body 1). It is configured as follows.
[0038]
Further, the fitting groove 12A and the fitting plate portion 13A are configured to be fitted only when the wrench portion 3 is in the normal mounting state or the inverted mounting state with respect to the wrench arm body 10, and at this time, The formation position of the locking protrusion 14 and the formation position of the locking recess 15 provided in an opposed state so that the locking protrusion 14 is locked in the locking recess 15 and the wrench 3 is connected and mounted to the wrench arm body 10. Is configured.
[0039]
Therefore, by performing the connecting operation so that the fitting groove 12A and the fitting plate portion 13A are fitted, the positions of the locking projections 14 and the locking recesses 15 are naturally adjusted, so that the wrench portion 3 is The operation of connecting and mounting to the wrench arm body 10 is easily performed.
[0040]
In this embodiment, the wrench unit 3 is provided with a release operation unit 11 of the reversing attachment / detachment mechanism 4 for releasing the connected and mounted state of the wrench arm body 10, and a manual release operation of the release operation unit 11 is performed. Thus, the wrench portion 3 can be separated from the wrench arm body 10 without using a tool or the like.
[0041]
Specifically, as shown in FIG. 2, the locking recess 15 is formed as a through hole 15 that penetrates the cylindrical first connecting portion 12 in the inward and outward directions, and a first hole having a position overlapping the through hole 15. A mounting groove 12 </ b> B is formed on the entire outer peripheral surface of the connecting portion 12.
[0042]
Further, a fitting member 17 formed by bending a metal strip having a spring property into a substantially C shape is fitted into the mounting groove 12B, and the fitting property is determined by the spring property of the fitting member 17. Unless a force is applied so as to open the body 17 to the outside, the fitted state in the mounting groove 12B is maintained.
[0043]
Further, a pressing piece 17A is cut out from the position corresponding to each through hole 15 of the to-be-fitted body 17 into the through hole 15 and bent, and each pressing piece 17A is present in each through hole 15. Thus, the fitted body 17 is configured to be substantially prevented from rotating with respect to the mounting groove 12B.
[0044]
Further, the fitted body 17 was formed in a shape to be fitted and fitted with a slight gap without the inner surface being in close contact with the outer circumferential surface of the mounting groove 12B, whereby the pressing piece 17A was cut out. The opposing portion of the to-be-fitted body 17 is configured to be able to be pressed inward of the first connection portion 12, and the outer surface of the opposed portion of the to-be-fitted body 17 where the pressing piece 17 </ b> A exists is formed by the release operation unit. It is assumed to be 11.
[0045]
That is, when the release operation portion 11 is pressed inward with a finger, the pressing piece 17A reaches the deep inside position of the through hole 15, and the locking piece 17A as shown by the arrow in FIG. When the release operation portion 11 on the side corresponding to the through hole 15 in which the convex portion 14 is locked is pressed, as shown in FIG. 2B, the pressing piece 17A presses the locking convex portion 14 to inward. The locking projection 14 is disengaged from the through hole 15 so that the first connecting portion 12 (wrench body 3) and the second connecting portion 13 (wrench arm body 10) can be pulled out and separated.
[0046]
Further, the pressing piece 17 </ b> A ensures that when the release operation portion 11 is pressed inward, the locking protrusion 14 locked in the through hole 15 can be securely disengaged from the through hole 15. The cut length from the fitting object 17 is set.
[0047]
Therefore, the operation of releasing the connected and mounted state of the wrench 3 and the wrench arm body 10 (the handle body 1) by simply pressing the release operation section 11 with a finger without using a tool or the like can be performed to pull out and separate. The composition is excellent.
[0048]
In addition, the configuration of the reversing attachment / detachment mechanism 4 that can be easily separated and operated by the release operation unit 11 is a configuration that can be easily designed and realized, and is excellent in mass productivity and can be configured at low cost.
[0049]
Next, a method of using the present embodiment in a narrow work space will be described.
[0050]
First, for example, the wrench part 3 is set in the mounted state shown in FIG. 3 (the wrench part 3 is inclined by + 15 ° with respect to the length direction of the handle body 1).
[0051]
The wrench 3 is engaged with the rotary tightening member 2 (a nut in the drawing) (see FIG. 5), and the handle body 1 is rotated in the direction of the arrow 16 to rotate the rotary tightening member 2 by about 30 ° ( See FIG. 6).
[0052]
Next, the wrench 3 is once disengaged from the rotary tightening member 2, only the wrench 3 is separated from the handle body 1 (wrench arm body 10) by the reversing attachment / detachment mechanism 4, and is mounted 180 ° front / back. The wrench 3 is inclined at −15 ° with respect to the length direction.) Then, the wrench 3 is engaged with the rotary tightening member 2 again (see FIG. 7), and the handle body 1 is rotated in the direction of arrow 16 to rotate the rotary tightening member 2 by about 30 ° (see FIG. 8). .
[0053]
In the same manner, by repeatedly turning the handle body 1 by about 30 ° and then mounting the wrench part 3 upside down by 180 ° continuously, the rotary tightening member 2 can be tightened. As shown in FIG. 8, since the handle body 1 can be always rotated in one direction (the direction in which the tightening torque sensing and notification mechanism 5 functions), the rotary tightening member 2 tightens the torque to a preset torque. When the wrench 3 is attached (when a predetermined torque is applied to the wrench 3), the tightening torque sensitive notification mechanism 5 is activated, and a notification sound is generated.
[0054]
Therefore, in this embodiment, only the wrench portion 3 inclined with respect to the handle body 1 can be turned upside down by 180 °, so that the function of the torque wrench (tightening torque sensing and notifying mechanism) can be ensured even in a narrow work space. 5) An unprecedented torque wrench capable of performing work without impairing 5) was realized.
[0055]
It should be noted that the present invention is not limited to the present embodiment, and a specific configuration of each component can be appropriately designed.
[0056]
【The invention's effect】
Since the present invention is configured as described above, the wrench portion can be easily attached to and detached from the handle body by manual operation, thereby separating the wrench body only from the handle body without inverting the handle body 180 °. The 180 ° front and back can be mounted in reverse. By rotating the rotary tightening member by a predetermined angle, separating the wrench part and mounting repeatedly, the handle can be securely turned in the direction in which the tightening torque sensitive notification mechanism functions. It is a revolutionary torque wrench that is extremely practical and unprecedented, as it is possible to work while rotating the body and even in a narrow work space.
[0057]
Further, in the invention according to the second aspect, a torque wrench having an excellent configuration that can constitute a torque wrench having a wrench portion of a spanner type or a monkey wrench type that reliably exerts the above-described functions and effects is provided.
[0058]
Further, according to the third aspect of the present invention, a torque wrench having a more practical configuration capable of easily releasing the reversing mechanism by a simple manual operation.
[0059]
Further, in the invention according to claim 4, the wrench portion can be separated from the handle body by merely pushing the release operation portion, so that this separation operation can be performed extremely easily, and the practicality is further improved. It becomes a torque wrench with an excellent configuration.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state where a wrench portion of the present embodiment is separated from a handle body.
FIG. 2 is a partial explanatory view showing a reversing attachment / detachment mechanism of the present embodiment and an operation thereof.
FIG. 3 is a perspective view showing a state where the wrench portion of the embodiment is mounted on a handle body.
FIG. 4 is a perspective view showing a state in which the wrench is turned 180 ° upside down from the state shown in FIG. 3;
FIG. 5 is an explanatory view showing a state in which a wrench is engaged with the rotary fastening member in the state of FIG. 3;
FIG. 6 is an explanatory view showing a state where the handle body is rotated by 30 ° from the state of FIG. 5;
FIG. 7 is an explanatory view showing a state in which the wrench is turned 180 ° upside down and engaged with the rotary tightening member from the state of FIG. 6;
FIG. 8 is an explanatory view showing a state where the handle body is rotated by 30 ° from the state of FIG. 7;
FIG. 9 is a partial explanatory view showing a tightening torque sensitive notification mechanism of the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Handle body 2 Rotational tightening member 3 Wrench 3A Opposite wrench surface 4 Reversing attachment / detachment mechanism 5 Tightening torque sensitive notification mechanism 11 Release operation unit

Claims (4)

A wrench for engaging a rotary tightening member such as a bolt or a nut is provided at the tip of the handle body, and a tightening device for notifying that the wrench has tightened the rotary tightening member to a predetermined torque value. In a torque wrench provided with a torque-sensitive notification mechanism, the wrench portion has an opposite wrench surface that is substantially parallel to the length direction of the handle body of the wrench portion and is not parallel to the length direction of the handle body and is inclined. A torque wrench characterized in that the wrench is provided with a reversing attachment / detachment mechanism capable of manually attaching / removing the wrench part to / from the handle body by 180 °. The said wrench part was comprised so that the direction of engagement of this wrench part to the said rotation fastening member from the side may incline with respect to the length direction of the said handle body. Torque Wrench. A release operation unit for releasing the mounted state of the wrench unit and the handle body by the reversing attachment / detachment mechanism is provided. By manually releasing the release operation unit, the wrench unit can be separated from the handle body without using a tool or the like. The torque wrench according to claim 1, wherein the torque wrench is configured as described above. 4. The torque wrench according to claim 3, wherein the release operation unit is configured to release a mounted state by the reversing attachment / detachment mechanism by performing a push operation. 5.

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