JP2019072824A - Torque limiter to be added to fastening force applying tool - Google Patents

Abstract

To provide a torque limiter to be added to a fastening force applying tool which can apply a function capable of performing torque management to the conventional fastening force applying tool.SOLUTION: A torque limiter to be added to a fastening force applying tool which applies a fastening force to a member to be fastened includes an attachment part 12 which is attached to an outer circumference of a fastening force applying part for applying the fastening force on the fastening force applying tool and a torque limiter part 14 which is connected to a rear end of the attachment part 12. Therein, the attachment part 12 is configured so that a limiter fixation tool for being connected to an actuator of the torque limiter part 14 is arranged on the rear side region, a fastening force applying fixation tool for being fixed to the fastening force applying tool is arranged on a front side region from the limiter fixation tool, and a fastening force is applied to the member to be fastened by an operation of the attachment part 12 so that the fastening force of the member to be fastened is measured by actuation of the torque limiter 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a torque limiter added to a clamping force application tool, and more particularly to a torque limiter added to a clamping force application tool suitable for use as a torque limiter attached to a handle of a clamping force application tool such as a ratchet spanner.

At present, there is an increasing trend in work requiring torque management in work such as connecting pillars used for overhead wire construction and connecting pillars in which a plurality of pillars are added to form a long pillar.
For these operations, a tightening force application tool such as a ratchet wrench is used, and a torque wrench is separately carried and used.
Inventing a detachable torque control device having the function of a torque wrench to the existing ratchet wrench makes it possible to reduce the weight more than the weight of a separate torque wrench, and to improve efficiency in overhead wire construction etc. .
There are many types of tightening force application tools, and it is extremely convenient if torque limiters can be added to various tightening force application tools.

JP, 2015-231639, A Japanese Patent Laid-Open No. 7-108468

It is desired that a variety of ratchet wrenches currently existing have the function of a torque wrench.
However, in the torque wrench of reference document 2, when the handle of the tightening force application tool is attached, the torque accuracy is not stable because the torque mechanism and the attached handle do not exist coaxially, and when operating the handle of the torque mechanism There is a problem that the handle attached to the hand to operate is close and difficult to operate.
Therefore, the main object of the present invention is to provide a torque limiter that can be added to a clamping force application tool that can provide torque management functions to existing clamping force application tools.

The torque limiter added to the tightening force application tool according to claim 1 of the present invention is a torque limiter added to the tightening force application tool which applies the tightening force to the member to be tightened,
A mounting portion integrally mounted on an outer periphery of a clamping force application portion for applying a clamping force in the clamping force application tool;
And a torque limiter unit connected to the rear end of the mounting unit,
In the rear area of the mounting portion, a limiter fixing tool for connecting to the working body of the torque limiter section is disposed, and in the front area of the limiter fixing tool, a tightening force applying fixing for fixing to the tightening force application tool A clamping force application tool characterized in that the tool is disposed, and the clamping force is applied to the member to be clamped by the operation of the mounting portion, and the clamping force of the member to be clamped is measured by the operation of the torque limiter. It is a torque limiter added to.
The torque limiter added to the tightening force application tool according to claim 2 of the present invention is a torque limiter added to the tightening force application tool which applies a tightening force to be rotated in the circumferential direction of the rotating shaft of the rotating member.
A mounting portion attached to an outer periphery of a tightening force application portion for applying a tightening force in the tightening force application tool, coaxially with an axis of the tightening force application portion;
And a torque limiter unit connected to the rear end of the mounting unit,
The mounting portion is disposed in the rear area thereof so as to coaxially connect the mounting portion and the operating body to the working body of the torque limiter portion, and is fixed to the tightening force application tool in the front side area from the limiter fixing portion A clamping force application tool fastener for the
The rotation member is rotated in the circumferential direction of the rotation shaft by the operation of the mounting portion, and the rotation force of the rotation member is measured by the operation of the torque limiter.
A torque limiter added to the tightening force application tool according to claim 1.
The torque limiter to be added to the tightening force application tool according to a third aspect of the present invention is that the mounting portion is provided with a fitting insertion hole in which the tightening force application portion of the tightening force application tool is fitted. It is a torque limiter added to the tightening force application tool described in 4.
In the torque limiter to be added to the tightening force application tool according to a fourth aspect of the present invention, the limiter fixing member is a plurality of fixed members disposed to intersect with the attachment portion connected to the working body of the torque limiter portion. It is a torque limiter added to the clamping force application tool according to claim 1 or 2, which fixes the mounting portion and the working body of the torque limiter portion.
The torque limiter added to the tightening force application tool according to a fifth aspect of the present invention, the tightening force application tool fixing device is a fixing screw disposed in the mounting portion,
The tightening according to any one of claims 1 to 3, wherein the fixing screw is removably fixed to the mounting portion and presses the surface of the tightening force application portion to fix the mounting portion to the tightening force application portion. It is a torque limiter added to the force application tool.

  According to the present invention, it is possible to provide a torque limiter that can be added to a clamping force application tool that can provide a torque management function to the existing clamping force application tool.

    The above object, other objects, features and advantages of the present invention will become more apparent from the following description of the mode for carrying out the invention, which is carried out with reference to the drawings.

It is an outline view showing an embodiment of a torque limiter added to a tightening force application tool concerning the present invention. It is a front illustrative view which shows the attachment part of the torque limiter added to the clamping force provision tool of FIG. It is a plane | planar schematic diagram which shows the attachment part of the torque limiter added to the clamping force provision tool of FIG. It is a cross-sectional schematic diagram which shows the torque limiter part in the torque limiter added to the clamping force provision tool of FIG. (A) is an illustrative view showing a non-operating state, (B) is an illustrative view showing a state in which tightening is performed. C) is an illustrative view showing a state in which a predetermined tightening torque value is reached. It is a cross-sectional schematic diagram of the torque limiter added to the clamping force provision tool of FIG. 1, (A is a figure showing the whole, (B) is the figure which expanded a part. It is an illustration figure for demonstrating the usage method of the torque limiter added to the clamping force provision tool which concerns on this invention. It is a perspective illustration figure of a ratchet spanner which is a clamping power grant tool concerning the present invention.

  The torque limiter 10 added to the clamping force application tool according to the embodiment of the present invention is rotated in the circumferential direction of the rotation shaft of the member to be rotated such as a bolt or nut, and uses the rotational force as the clamping force. It is a torque limiter added to the tightening force application tool which applies

  A clamping force application tool is for performing an operation (tightening operation) to be tightened, fixed or loosened by rotating a rotated member which is a bolted member such as a bolt or a nut in the circumferential direction of a rotating shaft. It is a tool such as a wrench, a spanner or the like.

As shown in FIGS. 1 and 7, the ratchet spanner 200, which is a clamping force application tool, comprises a head 210 and a handle 212 in the same manner as in the prior art, and the head 210 has a ratchet mechanism in one direction. A ratchet portion 214 is provided which is selectively blocked from rotating. The ratchet portion 214 is provided with a rod-shaped connecting portion 216 which is coaxially rotated with the ratchet portion 214.
The socket 220 is formed at one end with an engagement hole 222 that engages with the nut 300 as a rotated member, and is detachably mounted to the ratchet portion 214 via the connection portion 216.

  When the ratchet spanner 200 is used, first, the socket 220 is inserted into the connection portion 216 from above and pressed.

When tightening the nut 300, the nut 300 is engaged with the engagement hole 222 of the socket 220, the nut 300 is aligned with the mating bolt, the handle 212 is reciprocated, and the nut in the circumferential direction of the rotation shaft of the nut 300 Rotate 300 to fully tighten nut 300.
The nut 300 constitutes a rotated member.

The torque limiter 10 added to the tightening force application tool is a mounting portion 12 attached to the outer periphery of the handle 212 for applying the tightening force in the ratchet spanner 200 which is the tightening force application tool;
And a torque limiter unit 14 connected to the rear end of the mounting unit 12.

The mounting portion 12 is coaxial such that the longitudinal axis CL of the mounting portion 12 and the longitudinal axis CL of the thruster 110 constituting the working body of the torque limiter portion 14 are colinear in the rear region thereof. A limiter fixture 20 is provided for coupling.
The limiter fixing portion 20 is composed of a plurality of fixing pins, and in this embodiment, is composed of a fixing pin 22a and a fixing pin 22b.
In the mounting portion 12, a limiter connecting member 24 is fitted in a fitting insertion hole 40 of the mounting portion main body 18 of the mounting portion 12. The mounting portion 12 is bored so that a plurality of holes 28 a and holes 28 b for inserting and inserting the fixing pin 22 a and the fixing pin 22 b into the limiter connecting member 24 intersect with each other.

The limiter connecting member 24 is formed with a fixing hole 26a and a fixing hole 26b for inserting and inserting the fixing pin 22a and the fixing pin 22b.
A plurality of fixing pins 22a and fixing pins 22b constituting the limiter fixing tool 20 are separated so as to cross at intervals, that is, holes 28a and 28b and fixing holes 26a and 26b. Inserted and fixed. Thus, the mounting portion 12 and the thruster 110 are firmly fixed, and torque can be measured accurately.
Further, the limiter connecting member 24 is formed with a hemispherical recess at its tip. Since the shape of the rear end portion of the handle portion 212 of the ratchet spanner 200 is often hemispherical, it is formed so as to be easily in close contact with the shape of the rear end portion of the handle portion 212 of the ratchet spanner 200. It is done. Thus, the axis CL in the longitudinal direction of the mounting portion 12 and the axis CL in the longitudinal direction of the handle portion 212 of the ratchet spanner 200 which is a tightening force application tool are coaxial.

An axis CL in the longitudinal direction of the mounting portion 12 and an axis CL in the longitudinal direction of the handle portion 212 of the ratchet spanner 200 which is a tightening force applying tool are on the same line in a region forward of the portion where the limiter fixture 20 is disposed. A clamping force application tool fixture 30 is provided for securing coaxially.
In the mounting portion 12, the connecting member 32 is externally fitted in the fitting insertion hole 40 of the mounting portion main body 18 of the mounting portion 12.
The connecting member 32 is provided with a hole 36 for inserting the tightening force application tool fixture 30.
The connection member 32 has a fitting insertion hole 44 for inserting the handle portion 212 so that the longitudinal axis CL of the handle portion 212 and the longitudinal axis CL of the attachment portion 12 are coaxial. There is.
The connecting member 32 is fixed to the front end of the mounting portion 12 by the fixing member 34 inserted between the hole 46 formed at the front end of the mounting portion 12 and the hole 36 formed at the rear end of the connecting member 32. It is attached.
Thus, the mounting portion 12 of the handle portion 212 of the ratchet spanner 200 is arranged such that the central axis CL in the longitudinal direction of the mounting portion 12 and the central axis CL in the longitudinal direction of the handle portion 212 of the ratchet spanner 200 are concentric. The attachment portion main body 18 is integrally attached.
Integrally, it has a meaning that includes releasably fixing and becoming integral and fixing so as not to be removable.

The torque limiter 10 added to the tightening force application tool rotates the nut 300 serving as a rotated member in the circumferential direction of the rotation shaft by the operation of the mounting portion 12 and operates the torque limiter 14 with the rotational force of the nut 300 serving as the rotated member. It is comprised so that it may measure by.

The mounting portion 12 is formed with a fitting insertion hole 40 to be fitted to the mounting portion main body 18 constituting a handle portion attached to the outside of the handle portion 212 in the ratchet spanner 200 which is a tightening force application tool. .
The attachment portion main body 18 constituting the handle portion attached to the outside of the handle portion 212 constitutes a tightening force application portion.
The insertion hole 40 has a shape similar to the outer shape of the handle portion 212, and is formed with a relatively large diameter through hole so that it can be used by being inserted into various types of handle portions 212. .
In this embodiment, the handle portion 212 has a substantially cylindrical shape, and the attachment portion 12 has a substantially cylindrical shape in which the insertion insertion hole 40 formed in the attachment portion main body 18 corresponds to the outer shape of the handle portion 212. The attachment portion main body 18 of the attachment portion 12 is in the shape of a cylinder that concentrically surrounds the center line of the handle portion 212.
A fine uneven knurl is formed on the outer surface and is formed so as to be easy to grip.

The limiter fixing device 20 is constituted by a fixing pin 22 a and a fixing pin 22 b disposed on the mounting portion 12 in order to connect to a thruster 110 constituting an operating body of the torque limiter portion 14.
The fixing pin 22a and the fixing pin 22b are fitted in the fixing hole 26a and the fixing hole 26b which are bored in the radial direction at the rear end of the torque limiter main body 100 and the fixing hole 116a and the bore are formed at the front end of the thruster 110. The rear end of the mounting portion 12 and the thruster 110 of the torque limiter portion 14 are fixed by being fitted into the fixing hole 116 b.
The fixing pin 22a and the fixing pin 22b are crosswise fixed in a cross shape at an interval.

The tightening force application tool fixing device 30 is configured by a fixing screw disposed in the mounting portion 12.
The fixing screw is screwed into a fixing hole drilled in the radial direction at the tip of the torque limiter main body 100 and is detachably fixed to the mounting portion 12 so as to press the surface of the handle portion 212 to mount the mounting portion 12 is fixed to the handle portion 212.

The torque limiter unit 14 is a torque limiter in which the visual indicator 102 is attached to the torque limiter main body 100 as shown in FIGS. 1 and 4.
In the configuration of the torque limiter main body 100, the limiter main body member 104 is a cylindrical member, and a thruster 110 in which a part is accommodated inside the limiter main body member 104 is disposed at the tip of the limiter main body member 104. It is done. The thruster 110 disposed inside the limiter main body member 104 is accommodated so as to be movable in the axial direction of the limiter main body member 104.

  The thruster 110 is pivotally fixed to the limiter body member 104 by a pivot pin 106 inserted in a pin hole drilled on the opposite side to the toggle link 112.

The thruster 110 constitutes an operating body, and the thruster 110 is connected to the toggle link 112.
Furthermore, the toggle link 112 is pressed toward the thruster 110 by the resilient action of the compression spring 114 installed inside the limiter body member 104.
The adjustment screw 120 is a screw for pressing the compression spring 114 toward the thruster 110 to adjust the compression load.

The toggle link 112 includes a first toggle member 140. The first toggle member 140 is a strip having a substantially elliptical shape in a plan view, and is rotatably fixed to the thruster 110 by a connecting pin 142 near one end thereof. In the vicinity of the other end, it is rotatably fixed near the center of the toggle link 112 by the connecting pin 144.
The first toggle member 140 is held at an inclination angle with respect to the X-axis direction with respect to the wall surface of the insertion hole 42 of the first toggle member 140 in the non-operating state of the toggle mechanism.
When the mounting portion 12 is grasped and the head portion 210 of the ratchet spanner 200 is rotated clockwise, the thruster 110 rotates clockwise about the pivot pin 106 as shown in FIG. 5B.
Then, when the nut 300, which is the member to be rotated, reaches a predetermined tightening torque value, the thruster 110 is pushed back toward the rear end against the bias of the compression spring 114, and the toggle link 112 As shown in FIG. 5C, the toggle member 140 rotates clockwise in the drawing with the connecting pin 144 as a pivot point.
Upon actuation of the toggle link 112, the thruster 110 pivots within the limiter body member 104 in the counterclockwise direction in the figure, as shown in FIG. 5C, with the pivot pin 106 as a pivot.

An adjusting nut member 122 with which one end of the compression spring 114 abuts is screwed to the adjusting screw 120.
The adjustment nut member 122 engages, for example, a radially projecting engagement pin (not shown) with an axial guide groove (not shown) provided on the limiter main body member 104, for example. Although it is possible to move to, it is impossible to rotate around the axis.

The adjustment screw 120 is connected to a bearing member 124 fixed to the rear end portion of the limiter main body member 104.
Further, the adjustment screw 120 is axially supported by the bearing member 124 so as to be rotatable about its axis, and when the adjustment screw 120 is rotated, the adjustment nut member 122 linearly moves in the axial direction, and this adjustment nut By changing the spring force of the compression spring 114 disposed between the member 122 and the thruster 110, the set torque value can be changed.
A grip member 132 is attached to the outer periphery of the rear end portion of the limiter main body member 104.

  The set torque value may be such that the visual display 102 can check the scale displayed along the axial direction on the outer peripheral surface of the adjustment nut member 122 through the opening 130 formed on the outer peripheral portion of the limiter main body member 104 .

  On the other hand, although the torque value setting mechanism of the above-mentioned preset type torque wrench is provided with a scale on the adjusting nut member 122 which moves linearly, the single-function type torque wrench does not need such a scale. The adjustment nut member 122 is screwed into a screw formed on the inner peripheral surface of the limiter main body member 104 without providing the member 124, and the spring force of the compression spring 114 is adjusted by screwing the adjustment nut member 122. . To release the set torque value, the grip portion 132 is turned counterclockwise around the axis.

  Next, to describe the operation of the present embodiment, the mounting portion 12 connected to the torque limiter main body 100 provided with the visual indicator 102 is gripped to perform a tightening operation of the nut 300 which is a rotating member. When the nut 300, which is the member to be rotated, reaches a predetermined tightening torque value, the toggle link 112 operates, and the thruster 110 rotates counterclockwise in FIG. 5 with the pivot pin 106 as a pivot. It pivots within the limiter body member 104.

  The display body 150 attached to the tip of the adjustment nut member 122 moves with the movement of the adjustment nut member 122, and the visual display 102 visually observes the position of the display body 150. It can be confirmed by the operation noise or touch that the fastening force of has reached a predetermined torque value.

  As described above, in the torque limiter unit 14 of the present embodiment, a mechanism for confirming the position of the display body 150 which moves in relation to the operation of the adjustment nut member 122 by the external visual indicator 102 of the torque limiter main body 100 is provided. Therefore, the nut 300 can be formed to be fastened at a predetermined fastening torque value as viewed by the visual indicator 102.

When using the torque limiter added to the tightening force application tool according to the present invention, the handle portion 212 of the ratchet spanner 200 is inserted into the insertion hole 42 of the mounting portion 12 and the tightening force application tool holder 30 is rotated for installation The part 12 is fixed to the handle part 212.
Furthermore, the thruster 110 of the torque limiter portion 14 is inserted into the insertion hole 42 of the mounting portion 12 and the limiter fixing tool 20 is rotated to press the thruster 110 to connect the torque limiter portion 14 to the mounting portion 12 Do.
Thus, the torque limiter 10 to be added to the tightening force application tool having the torque limiter portion 14 attached to the rear end of the attachment portion 12 is configured.

As described above, the embodiments of the present invention are disclosed in the above description, but the present invention is not limited thereto.
That is, various changes can be added to the embodiments described above with respect to the mechanism, the shape, the material, the number, the position, the arrangement, and the like without departing from the scope of the technical idea and object of the present invention. And they are included in the present invention.

DESCRIPTION OF SYMBOLS 10 Torque limiter 12 attached to a clamping force application tool 14 mounting part 14 torque limiter part 18 mounting part main body 20 limiter fixture 22a, 22b fixing pin 24 limiter connecting member 26 hole 26a, 26b fixing hole 28 hole 28a, 28b hole 30 tightening force application Tool fixture 32 Connection member 34 Fixing members 36, 38 Holes 40, 42, 44 Insertion holes 46 Holes

Reference Signs List 100 torque limiter body 102 visual indicator 104 limiter body member 106 pivot pin 110 thruster 112 toggle link 114 compression spring 116a, 116b fixing hole

120 Adjustment screw 122 Adjustment nut member 124 Bearing member 130 Opening 132 Grip member

140 first toggle member 142, 144 connecting pin 150 indicator

200: Ratchet spanner 210: head 212: grip portion 214: ratchet portion 216: connection portion 220: socket 222: engagement hole portion

300 Nut (Roted Member)

CL axis

Claims (5)

A torque mill that is added to a clamping force application tool that applies clamping force to a workpiece.
A mounting portion integrally mounted on an outer periphery of a clamping force application portion for applying a clamping force in the clamping force application tool;
And a torque limiter unit connected to the rear end of the mounting unit,
In the rear area of the mounting portion, a limiter fixing tool for connecting to the working body of the torque limiter section is disposed, and in the front area of the limiter fixing tool, a tightening force applying fixing for fixing to the tightening force application tool A clamping force application tool characterized in that the tool is disposed, and the clamping force is applied to the member to be clamped by the operation of the mounting portion, and the clamping force of the member to be clamped is measured by the operation of the torque limiter. Torque limiter to be added. A torque limiter added to a clamping force application tool that applies a clamping force that attempts to rotate the rotating member in the circumferential direction of the rotation shaft,
A mounting portion attached to an outer periphery of a tightening force application portion for applying a tightening force in the tightening force application tool, coaxially with an axis of the tightening force application portion;
And a torque limiter unit connected to the rear end of the mounting unit,
The mounting portion is disposed in the rear area thereof so as to coaxially connect the mounting portion and the operating body to the working body of the torque limiter portion, and is fixed to the tightening force application tool in the front side area from the limiter fixing portion A clamping force application tool fastener for the
The rotation member is rotated in the circumferential direction of the rotation shaft by the operation of the mounting portion, and the rotation force of the rotation member is measured by the operation of the torque limiter.
A torque limiter added to the tightening force application tool according to claim 1.   The torque limiter added to the tightening force application tool according to claim 2, wherein the mounting portion is fitted with the tightening force application portion of the tightening force application tool, and the insertion hole is bored.   The limiter fixing device is a fixing device in which a plurality of pieces are disposed so as to cross the mounting portion connected to the operating body of the torque limiter portion, and fixes the mounting portion and the operating body of the torque limiter portion. A torque limiter added to the tightening force application tool according to claim 1 or 2. The tightening force application tool fixing device is a fixing screw disposed in the mounting portion,
The tightening according to any one of claims 1 to 3, wherein the fixing screw is removably fixed to the mounting portion and presses the surface of the tightening force application portion to fix the mounting portion to the tightening force application portion. Torque limiter added to the force application tool.