WO2018186466A1

WO2018186466A1 - Simple torque wrench

Info

Publication number: WO2018186466A1
Application number: PCT/JP2018/014553
Authority: WO
Inventors: 潤一郎秋場
Original assignee: 株式会社Ｔｏｋ
Priority date: 2017-04-07
Filing date: 2018-04-05
Publication date: 2018-10-11
Also published as: JP6786088B2; JPWO2018186466A1

Abstract

A torque wrench capable of clamping a member to be clamped, at a predetermined torque, with a small number of components and a simple structure is provided at low cost while achieving reductions in size and weight. A simple torque wrench 1 is constituted of a socket 2, a lever 3, a support spring 4, an adjustment holder 5, and a cap 6 and is used to clamp a nut etc. at a predetermined torque. The socket 2 and the lever 3 are integrally held by each other, in a state in which the periphery of a ratchet part 2b and a columnar body 3a is surrounded by the support spring 4, thus making a swing piece 3b abut against the ratchet part 2b in a direction tangential to the outer shape of the ratchet part 2b. Furthermore, the adjustment holder 5 holds, at an arbitrary position, a sandwich section 4c of the support spring 4 that sandwiches both sides of the columnar body 3a in the width direction.

Description

Simple torque wrench

The present invention relates to a torque wrench that tightens a tightening member with a predetermined torque.

Conventionally, as this type of torque wrench, there is one disclosed in Patent Document 1, for example.

This torque wrench is composed of a head portion that engages with a tightening member and a cylindrical lever. The head portion is configured by housing each component in a substantially rectangular parallelepiped case portion. The case portion communicates with a lever that houses a torque value adjusting spring and a spring force transmission rod. A plurality of steel balls and camshafts constituting a radial bearing are arranged in the case portion. Ratchet teeth are formed on the inner peripheral surface of the shaft hole of the cam shaft, and ratchet claws arranged on the transmission shaft are engaged with the ratchet teeth. For this reason, when the camshaft rotates clockwise, the transmission shaft rotates integrally. A socket or the like is detachably attached to the tip of the transmission shaft.

According to this torque wrench, as a configuration of the torque limiter, a roller member that contacts the cam portion of the cam shaft is rotatably disposed in the bearing recess of the roller support lever body, and acts against the force of the torque value adjusting spring. The force can be reduced with respect to the normal force acting on the roller member from the torque transmission cam surface. Thereby, members, such as a torque value adjustment spring and the spring force transmission rod which connects a roller support lever body and a torque value adjustment spring, can be reduced in size and weight.

International Publication No. 2010/119599

However, the conventional torque wrench disclosed in Patent Document 1 has a large number of components and is complicated and expensive. In addition, even though members such as torque value adjustment springs and spring force transmission rods can be reduced in size and weight, a torque wrench is constructed in a complex manner with a large number of components. Has a limit.

An object of the present invention is to provide a torque wrench that has a simple structure with a small number of components, is inexpensive, and can be further reduced in size and weight.

For this reason, the present invention
In a torque wrench that tightens a tightening member with a predetermined torque,
A holder portion that is fitted to the tightening member and transmits the rotational torque to the tightening member, and is provided coaxially with the holder portion, and is formed by inclining a plurality of teeth in the same direction on the outer periphery, and the contour of the outer shape A socket integrally formed with a ratchet portion having a polygonal shape;
The columnar body is formed of a columnar body having a width smaller than the outer shape of the ratchet portion, and a swinging piece that swings in the longitudinal direction of the columnar body is provided at one end portion of the columnar body. A lever with claws,
The position of the other end of the columnar body is regulated to hold the swinging piece in the tangential direction of the outer shape of the ratchet part, and it winds around the outer periphery of the ratchet part with which the swinging piece comes into contact An elastic member comprising a clathrate and a plate-like member having a sandwiching portion that sandwiches both sides in the width direction of the columnar body in the longitudinal direction of the columnar body from one end side to the other end side of the columnar body;
And a holding force adjusting member that is provided so as to be movable along the sandwiching portion and restrains the sandwiching portion from separating from both sides in the width direction of the columnar body at an arbitrary position of the sandwiching portion.

According to this configuration, the socket and the lever are held together with the ratchet portion and the columnar body surrounded by the elastic member so that the swinging piece abuts in the tangential direction of the outer shape of the ratchet portion. Is done. In addition, the holding force adjusting member suppresses the holding portion of the elastic member that holds both side portions in the width direction of the columnar body at an arbitrary position. In this state, the socket holder part is fitted to the tightening member, and the socket shaft is oriented so that the teeth formed on the ratchet part of the socket and the claw formed on the swinging piece of the lever do not engage with each other. When the lever is pivoted, the encircling portion of the elastic member is wound around the outer periphery of the ratchet portion having a polygonal shape, and the rotational force of the lever is transmitted to the ratchet portion via the encircling portion of the elastic member. For this reason, if the ratchet part rotates together with the holder part and the direction in which the lever rotates coincides with the direction of fastening the fastening member, the fastening member held by the holder part can be rotated and fastened.

¡Continuing this tightening according to the turning operation of the lever increases the tightening torque for the tightening member. The force with which the clathrating portion of the elastic member wraps around the outer periphery of the ratchet portion is the relative position with respect to the holding portion of the holding force adjusting member, that is, the wrapping force according to the length of the elastic member on the clawing portion side that can be freely moved. Become. When the tightening torque reaches a value exceeding the wrapping force, the enclosing portion of the elastic member slides out of the outer periphery of the ratchet portion, and the turning force of the lever is not transmitted from the enclosing portion to the ratchet portion. That is, the tightening torque for the tightening member is limited, and the torque wrench tightens the tightening member with a predetermined torque. At this time, since the swinging piece swings in the longitudinal direction of the columnar body, the enveloping part of the elastic member slides around the outer periphery of the ratchet part, and the claw formed on the swinging end of the swinging piece is outside the ratchet part. When overcoming the inclination on the back side of the teeth formed around, the swing piece swings away from the outer periphery of the ratchet portion. Therefore, the claw does not hinder the slip of the inclusion portion with respect to the ratchet portion.

On the other hand, when the lever is rotated around the socket axis in the direction in which the teeth formed on the ratchet portion of the socket and the claws formed on the swing piece of the lever are engaged, the teeth and the claws are Because of the engagement, the turning force of the lever is reliably transmitted to the ratchet portion via the swinging piece, regardless of the wrapping force that the clathrating portion of the elastic member winds around the outer periphery of the ratchet portion. For this reason, if the opposite direction in which the lever rotates coincides with the direction in which the tightening member is loosened, the tightening of the tightening member can be loosened by the lever turning operation.

As a result, a torque wrench capable of tightening a tightening member with a predetermined torque can be configured with a small number of component parts including a socket, a lever, an elastic member, and a holding force adjusting member, and with a simple structure. In addition, it is possible to easily provide a torque wrench that is reduced in size and weight.

Further, according to the present invention, the lever is notched so that the region adjacent to the swing piece forming region on the one end side of the columnar body leaves the region that supports the root of the swing piece, and is adjacent to the notch. The region is hollowed to a predetermined depth to form a cavity, so that the swing piece is formed integrally with the columnar body so as to be swingable.

According to this configuration, the lever in which the swing piece is integrally formed with the columnar body so as to be swingable can be realized with a simple structure. For this reason, the torque wrench can be further reduced in price, size and weight.

The present invention also provides:
A fixed portion fixed to the ratchet portion, and a cap including a flange portion having an outer shape larger than the outer shape of the ratchet portion,
The ratchet part is formed to protrude from the end face of the holder part longer than the width of the plate-like member forming the elastic member,
The end surface of the holder portion has a larger outer shape than the outer shape of the ratchet portion.

According to this configuration, the clasping portion of the elastic member is sandwiched and held between the flange portion of the cap and the end surface of the holder portion, and the movement of the elastic member in the axial direction of the socket is restricted. Accordingly, the elastic member that integrally holds the socket and the lever is not separated from the integrated socket and the lever. For this reason, when the lever is operated, the elastic member is detached from the integrated socket and lever so that the respective parts are not separated, and the handling of the torque wrench becomes easy and the operability is improved.

The present invention also provides:
An opening is formed around the axis of the ratchet, and a first protrusion or a first groove is formed on the inner periphery of the opening.
The fixing part of the cap is constituted by a protrusion that fits into the opening, and the second groove that fits into the first protrusion or the second protrusion that fits into the first groove is formed on the outer periphery of the protrusion. It is characterized by that.

According to this configuration, by fitting the protrusion of the cap into the opening of the ratchet portion, the first protrusion or the first groove is fitted with the second groove or the second protrusion, and the cap is easily attached to the ratchet portion. Can be fixed.

Further, the present invention is characterized in that a step that meshes with each other at a predetermined pitch is formed in the longitudinal direction of the columnar body on each contact surface between the holding force adjusting member and the columnar body.

According to this configuration, the relative position of the holding force adjusting member with respect to the sandwiching portion is held by meshing the steps formed on the contact surfaces of the holding force adjusting member and the columnar body. Therefore, the relative position of the holding force adjusting member with respect to the holding portion of the elastic member can be easily adjusted. For this reason, the adjustment operation of the tightening torque with respect to the tightening member is facilitated, and the operability of the torque wrench is improved.

According to the present invention, it is possible to configure a torque wrench that can tighten a tightening member with a predetermined torque with a small number of components and a simple structure. A torque wrench can be easily provided.

(A), (b) and (c) are the front view, back view, and side view of the simple torque wrench by one Embodiment of this invention. (A) is a sectional view taken along line IIa-IIa of the simplified torque wrench shown in FIG. 1 (b), and (b) is a sectional view taken along line IIb-IIb of the simplified torque wrench shown in FIG. 1 (c). is there. (A) is the perspective view which looked at the socket which comprises the simple torque wrench by one Embodiment from the nut holder part side, (b) is the perspective view seen from the ratchet part side. (A), (b) and (c) are the top view of the socket which comprises the simple torque wrench by one Embodiment, a partially broken front view, and a rear view. (A) is a perspective view of the lever which comprises the simple torque wrench by one Embodiment, (b), (c), (d) and (e) are a top view, a front view, a side view, and a rear view. (A) And (b) is the front view and side view of the support spring which comprise the simple torque wrench by one Embodiment. (A) And (b) is the front view and side view of an adjustment holder which comprise the simple torque wrench by one Embodiment. (A) And (b) is the front view and partially broken side view of the cap which comprise the simple torque wrench by one Embodiment.

Next, an embodiment for implementing a simple torque wrench according to the present invention will be described.

FIGS. 1A, 1B, and 1C are a front view, a rear view, and a side view of a simple torque wrench 1 according to an embodiment of the present invention. 2A is a sectional view taken along the line IIa-IIa in FIG. 1B, and FIG. 2B is a sectional view taken along the line IIb-IIb in FIG.

The simple torque wrench 1 includes a socket 2, a lever 3, a support spring 4, an adjustment holder 5 and a cap 6, and is used for tightening a nut (not shown) constituting a tightening member with a predetermined torque.

3A is a perspective view from the nut holder portion 2a side, and FIG. 3B is a perspective view from the ratchet portion 2b side. 4A, 4B, and 4C are a plan view, a partially broken front view, and a rear view of the socket 2, respectively. 4B, a front view is shown in the left half from the center line c, and a cross-sectional view taken along the line ABC in FIG. 4A is shown in the right half from the center line c.

The socket 2 is formed by integrally resin-molding the nut holder part 2a and the ratchet part 2b. The nut holder portion 2a is formed by opening a hexagonal column-shaped hole 2a1 at the center of a cylinder. A nut or the like is fitted into the hole 2a1, and rotational torque is transmitted from the nut holder portion 2a to the nut or the like. The ratchet portion 2b is provided coaxially with the nut holder portion 2a, and is formed by inclining a plurality of wedge-shaped teeth 2b1 on the outer periphery in the same direction. As shown by a dotted line in FIG. The outline has a hexagonal shape. The ratchet portion 2b has a cylindrical opening 2b2 formed around the axis, and a groove 2b3 is formed on the inner periphery of the opening 2b2 as shown in FIGS. 3 (b) and 4 (b). It is formed in an annular shape. As shown in FIG. 4C, the end surface 2a2 of the nut holder portion 2a has an outer diameter φ1 (φ1> L1) larger than the outer shape L1 of the ratchet portion 2b.

The lever 3 is shown in a perspective view in FIG. 5A and in a plan view, a front view, a side view, and a rear view in FIGS. 5B, 5C, 5D, and 5E. The lever 3 includes a rectangular columnar body 3a having a width W1 (see FIG. 2B) smaller than the outer shape L1 of the ratchet portion 2b, and is formed by resin molding or the like. The width of the columnar body 3a that is gripped by the operator is narrowed by a predetermined length.

A swing piece 3b that swings in the longitudinal direction of the columnar body 3a is provided at one end of the columnar body 3a, and a claw 3c that engages with the teeth 2b1 of the ratchet portion 2b at the swing end of the swing piece 3b. Is provided. In the present embodiment, the lever 3 is cut out in a region adjacent to the formation region of the swing piece 3b on one end side of the columnar body 3a, leaving a region 3d that supports the base of the swing piece 3b. The region adjacent to the notch 3e is hollowed to a predetermined depth to form a cavity 3f, so that the swing piece 3b is integrally formed with the columnar body 3a so as to be swingable in the longitudinal direction of the columnar body 3a. . Since a bottom surface is formed at the bottom of the cavity 3f, the region 3d that supports the base of the swing piece 3b and the side wall 3g that opposes it do not swing, and maintain their shape even when an external force is applied.

The front view and side view of the support spring 4 are shown in FIGS. 6 (a) and 6 (b). The support spring 4 constitutes an elastic member made of a plate-like member, and is formed into a shape having a holding portion 4a, an inclusion portion 4b, and a sandwiching portion 4c by bending a stainless-made plate spring having a width W2. Yes. A length L2 (see FIG. 4B) where the ratchet portion 2b protrudes from the end surface 2c of the holder portion 2 is formed longer than the width W2 of the support spring 4 (L2> W2).

The holding part 4a is configured by a pair of bent parts in which both end parts of the leaf spring are bent at a short right angle with a gap therebetween. As shown in FIGS. 1 and 2, the holding portion 4a is hooked to the other end portion of the columnar body 3a of the lever 3, thereby restricting the position of the other end portion of the columnar body 3a of the lever 3. As shown in FIG. 2 (b), the swinging piece 3b is held in contact with the tangential direction of the outer shape of the ratchet portion 2b. The inclusion part 4b is constituted by a bent part of a leaf spring bent into a shape surrounding the outer periphery of the ratchet part 2b. As shown in FIG. 2 (b), most of the inclusion portion 4b is wound around the outer shape of the ratchet portion 2b with which the swing piece 3b is in contact, and both end portions thereof are one end portions of the columnar body 3a. The both sides in the width direction on the side are sandwiched in the forming direction of the swing piece 3b. The clamping part 4c is composed of a pair of parallel straight portions of a leaf spring between the holding part 4a and the inclusion part 4b, and is gripped by the operator together with the lever 3 at the time of tightening work such as a nut. This clamping part 4c clamps the width direction both sides of the columnar body 3a to a longitudinal direction along the other end part side from the one end part side of the columnar body 3a.

7A and 7B are a front view and a side view, and the adjustment holder 5 is formed in a hollow rectangular tube shape by resin molding or the like, and constitutes a holding force adjusting member. As shown in FIGS. 1 and 2, the adjustment holder 5 is attached so as to surround the holding portion 4c of the support spring 4, and is provided so as to be movable along the holding portion 4c. The adjustment holder 5 suppresses the holding portion 4c of the support spring 4 from being separated from both sides in the width direction of the columnar body 3a of the lever 3 at an arbitrary position of the holding portion 4c. This restraining restricts the elastic force of the support spring 4 against the ratchet portion 2b.

The cap 6 is formed by resin molding or the like as shown in FIGS. 8 (a) and 8 (b). 8B, a side view is shown in the lower half from the center line c, and a sectional view taken along the line D--E-F in FIG. 8A is shown in the upper half from the center line c.

The cap 6 includes a cylindrical portion 6a and a flange portion 6b. The cylindrical portion 6 a constitutes a fixed portion that is fixed to the ratchet portion 2 b of the socket 2. The flange portion 6b has an outer diameter φ2 (φ2> L1) larger than the outer shape L1 of the ratchet portion 2b, similarly to the outer diameter φ1 (φ1> L1) of the end surface 2a2 of the nut holder portion 2a. The cylindrical portion 6a constitutes a protrusion that fits into the opening 2b2 of the ratchet portion 2b, and a protrusion 6a1 is formed in an annular shape on the outer periphery thereof. The protrusion 6a1 constitutes a protrusion that fits into the groove 2b3 formed in an annular shape in the opening 2b2.

When assembling the simple torque wrench 1 composed of the above-described components, first, the inclusion portion 4b of the support spring 4 is wound around the outer periphery of the ratchet portion 2b of the socket 2. Next, the rocking piece 3b at one end of the lever 3 is brought into contact with the outer periphery of the ratchet portion 2b exposed without being covered by the inclusion 4b, and support springs are formed at both corners of the other end of the lever 3. 4, the both side portions of the columnar body 3 a are sandwiched between the sandwiching portions 4 c of the support spring 4. Next, the opening of the adjustment holder 5 is inserted into the support spring 4 with the columnar body 3 a interposed therebetween, and the adjustment holder 5 is passed through the support spring 4. Next, the cylindrical portion 6a of the cap 6 is fitted into the opening 2b2 of the ratchet portion 2b of the socket 2, the cylindrical portion 6a is pushed into the opening 2b2, and the cylindrical portion is inserted into the groove 2b3 formed on the inner periphery of the opening 2b2. The ridge 6a1 formed on the outer periphery of 6a is fitted, the cap 6 is fixed to the socket 2, and the assembly of the simple torque wrench 1 is completed.

According to the simple torque wrench 1 according to the present embodiment, the socket 2 and the lever 3 are arranged in the tangential direction of the outer shape of the ratchet portion 2b by surrounding the ratchet portion 2b and the columnar body 3a with the support spring 4. In a state where the swing piece 3b is in contact with each other, they are held together. Moreover, the adjustment holder 5 suppresses the clamping part 4c of the support spring 4 which clamps the width direction both sides of the columnar body 3a in arbitrary positions. In this state, the holder 2a of the socket 2 is fitted to a nut or the like, and the tooth 2b1 formed on the ratchet 2b of the socket 2 and the claw 3c formed on the swinging piece 3b of the lever 3 are not engaged. When the lever 3 is rotated about the axis of the socket 2 in the direction of rotation (CW) (see FIG. 1 (a)), the outer periphery in which the inclusion portion 4b of the support spring 4 is the hexagonal shape of the ratchet portion 2b The region 3d and the side wall 3g are sandwiched and fixed by the inclusion part 4b, and the turning force of the lever 3 is transmitted to the ratchet part 2b via the inclusion part 4b of the support spring 4. For this reason, if the ratchet part 2b rotates with the holder part 2a and the direction of the CW in which the lever 3 rotates coincides with the direction of tightening the nut or the like, the nut or the like held by the holder part 2a can be rotated and tightened. it can.

¡Continuing this tightening according to the turning operation of the lever 3 increases the tightening torque of the nut and the like. The force with which the enclosure portion 4b of the support spring 4 wraps around the outer periphery of the ratchet portion 2b is relative to the clamping portion 4c of the adjustment holder 5, that is, the length of the support spring 4 on the enclosure portion 4b side that can be freely moved. It becomes the wrapping force according to. When the tightening torque reaches a value exceeding the winding force, the enclosure portion 4b of the support spring 4 slides around the outer periphery of the ratchet portion 2b, and the turning force of the lever 3 is not transmitted from the enclosure portion 4b to the ratchet portion 2b. That is, a limit is imposed on the tightening torque for a tightening member such as a nut, and the simple torque wrench 1 tightens the nut or the like with a predetermined torque. At this time, since the swing piece 3b swings in the longitudinal direction of the columnar body 3a, the enclosure portion 4b slides around the outer periphery of the ratchet portion 2b, and the claw 3c formed at the swing end of the swing piece 3b When climbing over the back slope of the tooth 2b1 formed on the outer periphery of the portion 2b, the swinging piece 3b swings away from the outer periphery of the ratchet portion 2b. Therefore, the claw 3c does not hinder the slipping of the inclusion part 4b with respect to the ratchet part 2b.

When the adjustment holder 5 approaches the socket 2 side of the support spring 4, the wrapping force of the inclusion portion 4 b on the ratchet portion 2 b increases as the adjustment holder 5 approaches the socket 2 side. Further, when the adjustment holder 5 moves to the side away from the socket 2 of the support spring 4, the wrapping force of the inclusion portion 4b on the ratchet portion 2b is weakened, so that it becomes smaller.

On the other hand, in the counterclockwise (CCW) direction in which the teeth 2b1 formed on the ratchet portion 2b of the socket 2 engage with the claws 3c formed on the swinging piece 3b of the lever 3 (see FIG. 1A). When the lever 3 is rotated in the opposite direction around the socket 2 axis, the teeth 2b1 and the claw 3c engage with each other, so that the enveloping portion 4b of the support spring 4 winds around the outer periphery of the ratchet portion 2b. Regardless, the turning force of the lever 3 is reliably transmitted to the ratchet portion 2b through the swing piece 3b. Therefore, if the direction of the opposite CCW in which the lever 3 rotates coincides with the direction in which the nut or the like is loosened, it is possible to loosen the nut or the like by rotating the lever 3.

As a result, the simple torque wrench 1 that can tighten a nut or the like with a predetermined torque can be configured with a small number of components, such as the socket 2, the lever 3, the support spring 4, and the adjustment holder 5, and a simple structure. It is possible to easily provide a torque wrench 1 that is inexpensive and that is reduced in size and weight.

Further, according to the simple torque wrench 1 according to the present embodiment, the lever 3 in which the swing piece 3b is integrally formed with the columnar body 3a so as to be swingable can be realized with a simple structure shown in FIG. For this reason, the simple torque wrench 1 can be further reduced in price, size, and weight.

Further, according to the simple torque wrench 1 according to the present embodiment, the outer diameter φ1 of the end face 2a2 of the nut holder portion 2a and the outer diameter φ2 of the flange portion 6b of the cap 6 are both larger than the outer shape L1 of the ratchet portion 2b (φ1). > L1, φ2> L1). Further, the protruding length L2 of the ratchet portion 2b is formed longer than the width W2 of the support spring 4 (L2> W2). For this reason, the inclusion part 4b of the support spring 4 is sandwiched and held between the flange part 6b of the cap 6 and the end face 2a2 of the holder part 2a, and the movement of the support spring 4 in the axial direction of the socket 2 is restricted. . Accordingly, the support spring 4 that integrally holds the socket 2 and the lever 3 is not separated from the integrated socket 2 and the lever 3. For this reason, when the lever 3 is operated, the support spring 4 is detached from the integrated socket 2 and lever 3 and the components are not separated, so that the simple torque wrench 1 is easily handled and the operability is improved.

Further, according to the simple torque wrench 1 according to the present embodiment, the groove 2b3 is fitted to the protrusion 6a1 by fitting the cylindrical portion 6a of the cap 6 into the opening 2b2 of the ratchet portion 2b, and the cap 6 can be easily ratcheted. It can fix to the part 2b.

In the above embodiment, the groove 2b3 is used as the first groove in the opening 2b2 of the ratchet portion 2b, and the protrusion 6a1 that fits into the groove 2b3 in the cylindrical portion 6a of the cap 6 is fitted into the first groove. The case where it formed as a protrusion was demonstrated. However, you may comprise so that the 2nd groove | channel may be formed in the cylindrical part 6a of the cap 6, and the 1st protrusion part fitted to this 2nd groove | channel may be formed in the opening part 2b2 of the ratchet part 2b. Also in this case, the cylindrical portion 6a of the cap 6 can be easily fixed to the opening 2b2 of the ratchet portion 2b by fitting the second groove and the first protrusion, and is the same as the above embodiment. The effect is effective. Further, the fixing of the cap 6 to the ratchet portion 2b is not limited to the coupling by such a snap fit, but the cylindrical portion 6a of the cap 6 is press-fitted into the opening 2b2 of the ratchet portion 2b, or the cylindrical portion 6a is fixed. It may be performed by welding and bonding to the opening 2b2. Even with such a configuration, the same effects as the above-described embodiment can be obtained.

Further, a step that meshes with each contact surface between the adjustment holder 5 and the columnar body 3a at a predetermined pitch may be formed in the longitudinal direction of the columnar body 3a. According to this configuration, the relative position of the adjustment holder 5 with respect to the sandwiching portion 4c is held by the step formed on each contact surface between the adjustment holder 5 and the columnar body 3a meshing. Therefore, the relative position of the adjustment holder 5 with respect to the holding portion 4c of the support spring 4 can be easily adjusted. For this reason, adjustment operation of the tightening torque with respect to a nut etc. becomes easy and the operativity of the simple torque wrench 1 improves.

In the above embodiment, the case where the tightening torque with respect to the tightening member is adjusted by adjusting the relative position of the adjustment holder 5 with respect to the clamping portion 4c has been described. However, the adjustment of the tightening torque is not limited to this. For example, the tightening torque can be selected by selecting the thickness and material of the leaf spring forming the support spring 4 and the shape of the enclosure portion 4b surrounding the ratchet portion 2b. Can be adjusted. For example, as shown in FIGS. 2B and 6A, both end portions of the inclusion portion 4b are not bent so as to be squeezed toward the both side portions of the columnar body 4a, and both ends of the columnar body 4a. When formed into a shape that gently contacts the part, the tightening torque can be adjusted to be weak. Also, the tightening torque can be adjusted by selecting the contour shape of the ratchet portion 2b. For example, in the above-described embodiment, the contour shape of the ratchet portion 2b is hexagonal. However, when the contour shape is an octagon, the tightening torque is weak, and when the contour shape is a tetragon, the tightening torque is Can be prepared strongly.

Further, the tightening force of the simple torque wrench 1 can be adjusted by changing the length of the holding portion 4c of the support spring 4 and the length of the columnar body 3a. Further, by selecting the shape of the hole 2a1 of the nut holder portion 2a of the socket 2, various nut / bolt sizes can be accommodated.

In the above embodiment, the case where the socket 2, the lever 3, the adjustment holder 5 and the cap 6 are made of resin has been described, but they may be made of metal. Moreover, although the case where the support spring 4 was formed with the metal was demonstrated, you may make it form with resin. Even with each of these configurations, the same effects as those of the above-described embodiment can be obtained.

The simple torque wrench 1 according to the present embodiment is suitable for fastening bolts and nuts used for attaching a resin toilet unit to a ceramic toilet.

When fixing a plastic toilet unit to a ceramic toilet using bolts and nuts, using a common metal tool such as a spanner or wrench may damage the resin toilet unit or ceramic toilet. . Further, when a non-metallic tool is used to tighten a bolt and a nut with a fastening force exceeding the elastic limit of the tool, the tool is destroyed. For this reason, a torque wrench provided with a torque limiter as disclosed in Patent Document 1 has been used in the past. However, as described above, a torque wrench is complicatedly configured with many components. There were limits to miniaturization and weight reduction. Therefore, in the operation | work which attaches a toilet unit to a toilet bowl using the torque wrench disclosed by patent document 1, the manageability of the tool in a toilet room with a small space is not good. In addition, if a person who is not used to handling tools performs the operation of attaching the toilet unit using the torque wrench, the resin toilet unit and the ceramic toilet are damaged.

However, according to the present embodiment, the simple torque wrench 1 that can tighten a nut or a bolt with a predetermined torque can be provided in a reduced size and light weight as described above. The handling of the tool in the room is good. For this reason, no matter who performs the installation work, the resin toilet unit, the ceramic toilet, and the simple torque wrench 1 itself are not damaged.

Furthermore, according to the present embodiment, the simple torque wrench 1 capable of tightening a nut or a bolt with a predetermined torque can be configured with a simple structure with a small number of components as described above, and provided at low cost. Can do. For this reason, the simple torque wrench 1 as an accessory of a toilet unit can be made into the size which can be enclosed in the packaging box of a toilet unit. In addition, the simple torque wrench 1 can be reduced to a price that can be sold as a set with the toilet unit, using the simple torque wrench 1 as a dedicated attachment tool for the toilet unit.

Further, the simple torque wrench 1 according to the present embodiment is suitable not only for tightening bolts and nuts used for attaching the toilet unit to the toilet, but also for simply tightening any fastening member with a predetermined torque. .

DESCRIPTION OF SYMBOLS 1 ... Simple torque wrench, 2 ... Socket, 2a ... Nut holder part, 2a1 ... Hole, 2a2 ... End face, 2b ... Ratchet part, 2b1 ... Teeth, 2b2 ... Opening part, 2b3 ... Groove, 3 ... Lever, 3a ... Columnar body 3b: swinging piece, 3c: claw, 3d: region for supporting the swinging piece 3b, 3e: notch, 3f: cavity, 3g: side wall, 4 ... support spring (elastic member), 4a ... holding part, 4b ... inclusion part, 4c ... clamping part, 5 ... adjusting holder (holding force adjusting member), 6 ... cap, 6a ... cylindrical part, 6a1 ... projection, 6b ... flange part

Claims

In a torque wrench that tightens a tightening member with a predetermined torque,
A holder part that fits into the tightening member and transmits rotational torque to the tightening member, and is provided coaxially with the holder part, and is formed with a plurality of teeth inclined in the same direction on the outer periphery. A socket integrally formed with a ratchet part having a polygonal shape,
The columnar body has a columnar body having a width smaller than the outer shape of the ratchet portion, and is provided with a swinging piece swinging in the longitudinal direction of the columnar body at one end of the columnar body, A lever provided with a claw to engage with,
A holding portion that regulates the position of the other end portion of the columnar body and holds the swinging piece in a tangential direction of the outer shape of the ratchet portion, and a ratchet portion that is in contact with the swinging piece. A plate-shaped member having an inclusion portion that wraps around the outer periphery, and a sandwiching portion that sandwiches both widthwise side portions of the columnar body in the longitudinal direction of the columnar body from one end side to the other end side of the columnar body An elastic member comprising:
A holding force adjusting member which is provided movably along the holding portion and suppresses the holding portion from separating from both sides in the width direction of the columnar body at an arbitrary position of the holding portion. Simple torque wrench.
The lever is cut away in a region adjacent to the swing piece forming region on one end side of the columnar body, leaving a region that supports the base of the swing piece, and a region adjacent to the cutout portion. 2. The simple torque wrench according to claim 1, wherein the swing piece is formed integrally with the columnar body so as to be swingable by being hollowed to a predetermined depth to form a cavity.
A fixed portion fixed to the ratchet portion, and a cap including a flange portion having an outer shape larger than the outer shape of the ratchet portion,
The ratchet portion is formed to protrude from the end surface of the holder portion longer than the width of the plate-like member forming the elastic member,
The simple torque wrench according to claim 1 or 2, wherein the end portion of the holder portion has an outer shape larger than an outer shape of the ratchet portion.
The ratchet portion is formed with an opening around an axis, and a first protrusion or a first groove is formed on the inner periphery of the opening,
The fixing portion of the cap is configured by a protrusion that fits into the opening, and a second groove that fits into the first protrusion on the outer periphery of the protrusion or a second groove that fits into the first groove. 4. The simple torque wrench according to claim 3, wherein a protrusion is formed.
5. The step according to claim 1, wherein a step is formed in the longitudinal direction of the columnar body at a predetermined pitch on each contact surface between the holding force adjusting member and the columnar body. The simple torque wrench according to item 1.