JP2020001105A - Torque meter - Google Patents

Abstract

To improve such conventional disadvantages that a torque meter to which a tightening tool such as a pipe wrench is connected is damaged by a load caused by tightening or difficult to operate.SOLUTION: A torque meter includes: a torque meter body 10 having a measurement part 11 for measuring a torque value T, a calculation part 14 for calculating a torque value Ton a tightening part from the torque value Ton the measurement part 11 and a display part 12 for displaying the torque value Ton the tightening part 31; and a connection body 20 for connecting a handle part 32 of a tightening tool 30 to the measurement part 11 of the torque meter body 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a torque meter for measuring torque provided with a connecting body for connecting a tightening tool.

  In a conventional gas piping work, a pipe wrench is used to tighten a gas pipe, and the pipe is tightened based on the experience of a worker so that the pipe is tightened with a predetermined torque. However, since the work is performed based on the experience of the worker, the work is often not tightened with a predetermined torque, and a work of confirming the tightening torque in addition to the work of tightening is required. There were drawbacks.

  In order to solve the above-mentioned drawbacks, for example, Patent Document 1 discloses a torque meter including a torque meter 2 and a pipe wrench 4 having a socket S into which a socket 3 of the torque meter 2 is detachably fitted. Proposed.

Japanese Utility Model Publication No. 3-40075

  However, in the invention described in Patent Document 1, the socket S for fitting the square drive 3 is located near the tightening portion of the pipe wrench 4, and a tightening torque for tightening the pipe is applied to this portion. A load equal to or greater than the load applied to the pipe wrench 4 will also be applied to the torque meter-2 side. Therefore, when the tightening torque is set to a high value, a load is applied to the square drive 3 and the like on the torque meter 2 side, and the socket S or the square drive 3 may be damaged. There are disadvantages that are difficult to perform, and it has been desired to improve these.

In view of the above-mentioned problem, the present invention is a torque meter including a torque meter main body and a connecting body that connects a tightening tool to the torque meter main body, wherein the torque meter main body measures a torque value. Unit, a computing unit that calculates the torque value in the measuring unit to the torque value in the tightening unit of the tightening tool, and a display unit that displays the torque value in the tightening unit,
The coupling body includes a mounting member that inserts near a rear end of a handle portion of the tightening tool, and a retaining member that includes an insertion portion that is inserted into an opening of the rear end of the handle portion of the mounting member and the tightening tool. And
The mounting member has a fitting portion to which the measuring unit of the torque meter body is detachably fitted.

  Further, in addition to the above-described configuration, the connecting body is formed with a locking piece provided so as to be able to protrude and retract on the outer peripheral surface side of the insertion portion of the retaining member and a concave portion on the inner peripheral surface side of the inserted portion of the mounting member. And a locking groove formed.

  Further, in addition to the above-described configuration, the coupling body is formed on the inner peripheral surface of the male screw portion formed in the insertion portion of the retaining member, and the inserted portion of the mounting member for screwing the male screw portion of the insertion portion. And a female screw portion formed.

  In addition, in addition to the above-described configuration, it is preferable that the mounting member has a pressing and fixing portion that presses and fixes the handle to adjust the mounting position when a gap is provided between the mounting member and the handle.

  Further, in addition to the above-described configuration, it is preferable that the connecting body has a fitting portion formed in a convex shape so as to fit into a replacement hole for replacing the measuring portion.

  In addition to the above-described configuration, the torque meter body includes a storage unit that stores a proportionality constant based on various conditions of a tightening target such as a tightening tool and a pipe, and the storage unit includes the tightening tool and the pipe. It is preferable to have a calculating unit that calls a proportional constant corresponding to the various conditions to be tightened and multiplies the proportional constant by the torque value in the measuring unit, and a display unit that displays the torque value in the tightening unit.

  According to the first or second aspect of the present invention, by using the arm length of the conventional pipe wrench, the load applied to the torque meter main body can be reduced, and it is securely connected to a tightening tool such as a pipe wrench. It is possible to provide a torque meter provided with a connecting body.

  According to the third aspect of the present invention, the retaining member can be fixed to the mounting member even when it is not inserted into the opening of the handle.

  According to the invention as set forth in claim 4, even a fastening tool having a width smaller than the assumed width of the handle portion of the fastening tool can be firmly pressed and fixed, and can be mounted in one size. It can be used by being mounted on a fastening tool having a different handle width depending on only the mounting member.

  According to the invention as set forth in claim 5, a digital torque meter main body that can be replaced without a socket such as a hexagon bolt by fitting a convex fitting portion into a replacement hole for replacing a socket. Can be connected to the handle of the tightening tool.

  According to the sixth aspect of the present invention, by displaying the torque value of the tightening portion, the tightening operation can be performed while quickly checking the torque value of the tightening portion.

It is a front view showing a torque meter provided with a connector which connects a fastening tool to a torque meter main body by a connector in an embodiment of the present invention. FIG. 2 is a partially enlarged exploded perspective view showing the vicinity of a connector in FIG. 1. FIG. 2 is a sectional view taken along line AA of FIG. It is the elements on larger scale exploded perspective view which shows the connection object in 2nd Embodiment. It is the elements on larger scale which show the press fixing part of the connection body in 3rd Embodiment. It is a front view showing a torque meter provided with a connector which connects a fastening tool to a torque meter main part by a connector in a 4th embodiment. FIG. 7 is an enlarged exploded perspective view showing the vicinity of the connector in FIG. 6.

  An embodiment of the present invention will be described in detail with reference to the drawings.

(Embodiment)
As shown in FIGS. 1 and 2, the torque meter according to the present invention includes a torque meter main body 10 and a connecting body 20 that connects a tightening tool 30 to the torque meter main body 10.

The tightening tool 30 has a tightening portion 31 for tightening a tightening target P such as a pipe, and has at least a handle 32 for operating the tightening portion 31. The torque meter body 10 includes a measurement unit 11 for measuring the torque value T _1, and a calculating unit for calculating a torque value T ₁ in the measuring unit 11 to the torque value T ₂ in the section tightening the tightening portion 31 and a display unit 12 for displaying the torque value T _2, has at least. The connecting body 20 includes at least a mounting member 21 and a retaining member 22.

  The tightening tool 30 is a conventional manual tool such as a pipe wrench or a spanner, and has an opening 33 near the rear end of the handle 32 for storing through a string or the like. The opening 33 in the present embodiment is located at a position passing through the periphery from the rear end of the handle 32 and is a circular hole.

The torque meter main body 10 includes a measuring unit 11 including a socket 11a for measuring torque, a storage unit storing a proportionality constant a corresponding to the size of the tightening tool 30 and a pipe diameter of the tightening target P, and the like. The proportional constant a corresponding to the size of the tightening tool 30 and the diameter of the tightening target P is called from the storage unit, and the proportional constant a is multiplied by the torque value T ₁ in the measuring unit 11 to tighten the tightening tool 30. It has a calculating section for setting the torque value T ₂ in the section 31 and the display section 12 for displaying the torque value T ₂ in the tightening section 31. In addition, the torque meter main body 10 is provided with an input unit 13 composed of a push-type button provided around the display unit 12, and through this input unit 13, the worker can use the input unit 13 to set the tightening tool 30 and the tightening target P. It is preferable that various conditions be input so that a proportional constant a described later can be called from the storage unit.

The measurement unit 11 is used in a conventional digital torque meter such as a torque sensor that detects a torque using a strain gauge or the like, the calculation unit and the storage unit are electronic circuits (CPU, memory, etc.), and the display unit 12 is a liquid crystal screen. (The operation unit and the storage unit are not shown). Further, the storage unit stores the torque value T ₁ in the tightening unit and the torque value T ₂ in the measuring unit during the tightening operation, and causes the display unit 12 to display the torque value again for confirmation after the tightening operation. You may.

  The connecting body 20 includes a mounting member 21 having a fitting portion 21f which can be fitted by inserting around the rear end of the handle portion 32 of the tightening tool 30 and an insertion hole 21e formed in the mounting member 21. And a retaining member 22 having a substantially rod-shaped insertion portion 22a to be inserted into the opening portion 33 of the portion 32.

  The mounting member 21 includes a box-shaped fitted portion 21f having an opening 21i on one surface. The tightening tool 30 is inserted into the fitted portion 21f from the rear end of the handle 32 through the opening 21i, and fitted around at least the periphery of the opening 33 of the handle 32. On the side surface of the fitted portion 21f, a fitting portion 21d to which the socket 11a of the measuring portion 11 of the torque meter body 10 is detachably fitted, and an opening portion 33 of the handle portion 32 when the tightening tool 30 is inserted. And an insertion portion 21a formed with an insertion hole 21e communicating with the insertion portion 21a.

  The inserted portion 21a is formed to protrude in a cylindrical shape from the side surface of the fitted portion 21f, and extends from the open end 21b which is an outer end along the center axis direction of the cylindrical body to the fitted portion 21f. The insertion hole 21e having a circular cross-section penetrating therethrough is provided. In the longitudinal direction of the insertion hole 21e, a locking groove 21c is formed at the center slightly open end 21b side so that the inner peripheral surface thereof is depressed over the entire circumference, and as described later, locking of the retaining member 22 is performed. The engagement with the piece 22b locks the state in which the retaining member 22 is inserted.

  The fitting portion 21d is formed so as to protrude from a side surface opposite to the fitted portion 21f in which the inserted portion 21a is formed, and can be fitted to the measuring portion 11 (socket 11a) of the torque meter main body 10. Formed in a bolt head shape (for example, hexagonal shape). The fitting portion 21d is coaxial with the insertion hole 21e in order to prevent the torque meter main body 10 and the connecting body 20 from coming off during the tightening operation in a measuring method (S1-S4) described later. Preferably, it is formed at a position.

  The retaining member 22 is related to a substantially bar-shaped insertion portion 22a that can be inserted into the insertion hole 21e of the insertion target portion 21a, and a locking groove 21c of the insertion hole 21e on the outer peripheral surface of the insertion portion 22a. It has a substantially spherical locking piece 22b provided to be able to protrude and retract so as to fit together, and a finger hook ring 22c for assisting the pull-out operation of the retaining member 22. As shown in FIG. 3, in a state where the handle 32 of the fastener 30 is inserted into the fitted portion 21 f from the opening 21 i of the mounting member 21, the retaining member 22 is connected to the opening end 21 b of the inserted portion 21 a. Through the opening 33 of the handle 32 to the fitting portion 21d. Thereby, the fastening tool 30 can be firmly fixed to the connecting body 20, and the engaging piece 22b of the inserted portion 21a protrudes and engages with the engaging groove 21c of the inserted portion 21a. This prevents the retaining member 22 from accidentally falling off.

The proportionality constant a used for the calculation by the torque meter main body 10 is attached to a torque measuring device (not shown) provided in the tightening portion 31 of the tightening tool 30 of each maker having a different size in advance. In a state where a load F is applied to the handle 14 of the connected torque meter main body 10, the torque value T ₃ in the torque measuring device and the torque value T ₁ in the measuring unit 11 are measured, and the ratio T ₃ / T is obtained. _It is determined by ₁ .

Next, a description will be given of a measuring method of the torque value T ₂ in the torque value T ₁ and the fastening portion 31 of the fastening tool 30 in the measurement unit 11 of the torque meter body 10 described above (S1-S3).

  (S1) The worker inputs conditions such as the diameter of the tightening tool 30 and the pipe of the tightening target P of each manufacturer having different sizes to the input unit 13 of the torque meter main body 10 and stored in the storage unit. The proportional constant a corresponding to various conditions is called out to the calculation unit.

  (S2) With the socket 11a of the measuring section 11 of the torque meter body 10 fitted to the fitting section 21d of the connector 20 connected near the rear end of the handle 32 of the tightening tool 30, the torque meter body is By operating the ten handle portions 14, the tightening work of the tightening target P is performed.

(S3) the tightening work at the same time, in the arithmetic unit, by multiplying the proportional constant a to the torque value T ₁ in the measured measurement unit 11, performs an operation of the torque value T ₂ at the fastening portion 31.

  Therefore, according to the torque meter main body 10 having the above-described configuration, the load applied to the torque meter main body 10 can be reduced by using the arm length of the conventional pipe wrench, and the tightening of the pipe wrench or the like can be performed. It is possible to provide a torque meter with a connector 20 that can be securely connected to the tool 30.

Further, it is possible to perform the tightening operation while checking the torque value T ₂ the tightening unit 31 quickly during fastening operation.

  Next, the second, third, and fourth embodiments will be described in detail (see FIGS. 4 to 6). Note that a detailed description of a portion common to the configuration of the above-described embodiment will be omitted.

  As a second embodiment, as shown in FIG. 4, a male screw portion 22 d formed on the outer peripheral surface of the insertion portion 22 a of the retaining member 22 and an inner peripheral surface of the inserted portion 21 a of the mounting member 21 are formed. Female thread portion 21g. By screwing the male screw portion 22d into the female screw portion 21g, not only can the insertion state be more firmly fixed, but also the retaining member 22 can be attached even when the tightening tool 30 is not inserted. This enables temporary fixing to the member 21.

  As a third embodiment, as shown in FIG. 5, one or a plurality of pressing and fixing portions 21h are provided. The mounting member 21 according to this embodiment has a trapezoidal side surface and a wide opening 21i compared to the mounting members 21 according to the first and second embodiments. Thereby, it can be used for the fastening tools 30 of various sizes.

  When the fastening tools 30 of various sizes are inserted and used, a gap or the like is generated between the inner surface of the fitted portion 21f and the handle 32. In order to prevent rattling due to the gap, a pressing and fixing portion 21h that is screwed in from the outside to the inside of the fitted portion 21f is used. The pressing and fixing portion 21h is disposed on the outer peripheral surface around the opening 21i of the fitted portion 21f, and in the present embodiment, is composed of three fixing screws that are screwed from above and below and from one side. The number of the pressing and fixing portions 21h is not limited to this embodiment, and the pressing type may be a pin type or the like other than the screw type.

  By the pressing and fixing portion 21h, it is possible to press and fix firmly at a position corresponding to the shape of the handle portion 32. Along with this, by setting the maximum width of the handle 32 of the tightening tool 30 in which the use of the mounting member 21 can be assumed, after mounting on the tightening tool 30 of the handle 32 having a width smaller than the maximum width. By tightening the fixing screw, which is the pressing and fixing portion 21h, the handle 32 can be mounted in a state in which the vicinity of the rear end is firmly pressed and fixed, and the width of the handle 32 differs depending on only the mounting member 21 of one size. It can be mounted on the tightening tool 30 and used.

  As a fourth embodiment, as shown in FIGS. 6 and 7, the fitting portion 21d of the connecting body 21 is formed to be convex in the outer peripheral direction from the surface facing the opening 21i. The fitting portion 21d is fitted into a concave replacement hole 11b for replacing the socket 11a of the conventional digital torque meter, so that the torque meter main body 10 can be inserted without passing through the socket 11a fitted with a hexagon bolt or the like. To the handle 32 of the tightening tool 30.

  In the above embodiment, a plurality of preferred embodiments of the present invention have been exemplified, but the present invention is not limited to the above embodiment, and improvements and modifications can be made within the scope described in the claims. For example, the torque meter body of the present invention can be changed to a direct-reading analog torque meter including a memory panel and the like.

10: Torque meter body, 11: Measurement part, 11a: Socket, 11b: Replacement hole, 12: Display part, 13: Input part, 14: Handle part, 20: Connected body,
21: mounting member, 21a: inserted portion, 21b: open end, 21c: locking groove, 21d: fitting portion, 21e: insertion hole, 21f: fitted portion, 21g: female screw portion, 21h: pressing Fixing part (fixing screw), 21i ... opening,
22: retaining member, 22a: insertion part, 22b: locking piece, 22c: finger ring, 22d: male screw part,
30 ... tightening tool, 31 ... tightening part, 32 ... handle, 33 ... hole,
P: Tightening target (pipe), F: Load, a: Proportional constant, T ₁ : Torque value at measuring part, T ₂ : Torque value at tightening part, T ₃ : Torque value at torque measuring device

Claims (6)

A torque meter comprising: a torque meter main body; and a connecting body that connects a tightening tool to the torque meter main body, wherein the torque meter main body includes a measuring unit that measures a torque value, and a torque value in the measuring unit. A computing unit that computes the torque value in the tightening unit of the tightening tool, and a display unit that displays the torque value in the tightening unit,
The coupling body includes a mounting member that inserts near a rear end of a handle portion of the tightening tool, and a retaining member that includes an insertion portion that is inserted into an opening of the rear end of the handle portion of the mounting member and the tightening tool. And
The said mounting member has a fitting part which fits the said measurement part of the said torque meter main body detachably, The torque meter characterized by the above-mentioned.   The coupling body includes a locking piece provided so as to be able to protrude and retract to the outer peripheral surface side of the insertion portion of the retaining member, and a locking groove formed to be recessed toward the inner peripheral surface side of the inserted portion of the mounting member. The torque meter according to claim 1, further comprising:   2. The connector according to claim 1, wherein the connecting member has a male screw portion formed on an outer peripheral surface of the insertion portion of the retaining member, and a female screw portion formed on an inner peripheral surface of the inserted portion of the mounting member. Torque meter.   The torque meter according to any one of claims 1 to 3, wherein the mounting member has a pressing and fixing portion that presses and fixes the handle to adjust the mounting position.   The torque meter according to any one of claims 1 to 3, wherein the connecting body has a fitting portion formed in a convex shape so as to fit into a replacement hole for replacing the measuring portion. .   The torque meter main body has a storage unit in which a proportionality constant based on various conditions of a tightening target such as a tightening tool and a pipe is stored, and the storage unit stores the proportionality constant based on various conditions of the tightening target such as the tightening tool and a pipe. The torque meter according to claim 1, further comprising: a calculation unit that calls a corresponding proportional constant and multiplies the proportional constant by a torque value in a measuring unit; and a display unit that displays a torque value in a tightening unit. .

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