JPS62176777A - Torque wrench with digital device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a strain meter to set a torque value in advance, input the reading of the strain meter, and store the calculation to ensure a constant torque. This invention relates to a torque wrench with a digital device.

[Prior art]

Conventional) Lecque wrenches are known that transmit rotation using II 113 force, and those that transmit rotation using means such as springs and cams.

[Problem that the invention seeks to solve]

In the case of the conventionally known torque wrench using force, it is unavoidable that the frictional force decreases, and in the case of a device that uses a cam, when an overload occurs, the cam is pushed up against the spring and escapes, preventing transmission. Variation in torque is indispensable in order to ensure proper disconnection.

[Means for solving problems]

The present invention was invented in order to eliminate these problems in view of the various actual circumstances. Namely, the present invention has been invented in order to eliminate these problems. Namely, the handle part of the wrench body having a rectangular drive shaft has a position away from the shaft center and a position equidistant from this position. Strain gauges are installed on both sides of the handle at each position, and the outputs of these two strain gauges are used to perform calculations and input into a digital device that incorporates a mechanism for amplifying and storing, a torque value setting mechanism, and an alarm display mechanism. This is a torque wrench with a digital device, which calculates using a strain meter and inputs it into the digital device.
The purpose of the present invention is to calculate and store the torque value, and when a preset torque value is reached, it is displayed by means such as an alarm so that an accurate value of 1 to 1 torque can be obtained.

〔Example〕

Next, an embodiment of the L/L wrench with a latch device according to the present invention will be described in detail with reference to the accompanying drawings.

Reference numeral 1 denotes a main body with a toothed hashidle 2, a recess 3 is provided in the main body 1, a shaft hole 6 is bored in the recess 3, a ratchet tooth portion 4 is provided in the shaft hole 6, and a ratchet tooth portion 4 is provided in the lower part. Fitting corner 5
A fitting corner portion 5a is provided protrudingly supported by a drive shaft 5 having a diameter a. Further, the upper part of the drive shaft 5 is fitted into and supported by a shaft hole 8 bored in the cover 7.

In addition, one end of a pair of engaging pawls 9, 9, which are engaged with the southern part of the radiet, is provided in the recess 3 in correspondence with the toothed portion 4, and is rotatably supported around the shaft support. Matching claw 9,
9 are provided with springs 10.degree. 10 which are biased toward the center line of the main body 1. Also, a pair of engaging claws 9, 9
A cam body for switching the engaging claws 9, 9 is interposed between them, and a lever 11 fitted on a shaft protruding from the cover 7 is used to perform the switching operation.

The ITII handle 2 has strain gauges 12, 12a on both sides, respectively, at a position M at a distance from the center of the drive shaft 5, and at a position N at an equal distance L' from this position M.
12', 12a' and 13° 13n, 13', 13a' are attached, and the power source E shown in FIG. 3 is short-circuited.

In addition, strain gauges 12, 12a, 12', 12a' and 13.1
It incorporates an amplification and storage mechanism for the output calculated by combining the outputs of 3a, 13', and 13a', an l/lux setting mechanism, and an alarm display mechanism. This is the input to the digital device 14.

[For production]

As is clear from the above-mentioned structure, the present invention allows the drive shaft 5 of the main body 1 to be engaged with the ratchet tooth portion 4 provided on the drive shaft 5 by switching the engagement piece 9, thereby turning the handle 2. Transmitted and rotated to drive shaft 50 corner 5a
Tightening is performed by rotating the rotated body fitted with the rotary body, but before this tightening, the torque value is set in advance,
When the handle 2 is turned, the change in the strain meter is read and calculated, and the torque value is stored, an alarm or display is issued when the torque setting value is reached when tightening is required. Therefore, it is possible to accurately obtain a constant torque value, and the mechanism can also be simplified.

〔effect〕

As described above, the present invention provides a handle portion of a wrench body having a rectangular drive shaft, with strain gauges provided on both sides of the handle portion at a position away from the shaft center and at a position equidistant from this position.
It is a torque wrench with a digital device that calculates the output of the strain meter, and inputs it to a digital device that incorporates a mechanism to amplify and store it, a torque value setting mechanism, and an alarm display mechanism.The strain meter is installed on both sides of the handle. Calculations can be made easily by attaching the drive shaft at an equal distance from the center of the drive shaft.
If you do so, you will always be able to obtain a constant torque 77 value.

[Brief explanation of drawings]

FIG. 1 is a plan view of the torque wrench, FIG. 2 is a side view, and FIG. 3 is a wiring diagram. 1. Body 2. Handle recess 4. Ratchet l-18 part 5. Drive shaft 5a... Fitting corner 6
・・Shaft hole 7-・Cover 8-・・Shaft hole 9・・Engagement hole 10・Spring 11・・・Lever 12, 12a,
12', 12a' and 13, 13a, 13'. 13a'...Strain meter 14...Digital device patent applicant
Yamashita Industrial Research Institute Co., Ltd. 11, Agent
Hide Tsuchihashi blunder ＼ scolded. th ′j evil

Claims (1)

[Claims] Strain gauges are installed on both sides of the handle part of the wrench body having a rectangular drive shaft, at a position away from the shaft center and at a position equidistant from this position, and the output of this strain gauge is stored in a calculation and storage mechanism. A torque wrench with a digital device that inputs the information to a digital device incorporating a torque value setting mechanism and alarm display mechanism.