JPH08110277A - Torque wrench tester - Google Patents

Abstract

PURPOSE: To provide a torque wrench tester, which can measure the preset torques of various kinds of torque wrenches having the different sizes. CONSTITUTION: A rocker lever 17, which can be slid into the axial direction of a loading arm 16 is coupled with the loading arm 16 that is pivotally supported with a driving shaft. An engaging pin 20, which can be engaged with a handle part 19 of a torque wrench 18, is uprightly provided at the end part of the rocker arm. Therefore, the preset torque values of various kinds of torque wrenches having the different sizes, can be measured accurately and readily with one tester. Furthermore, the torque correction can be performed without removing the torque wrench 18 and without disturbance from the loading lever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque wrench tester for applying an external force (tightening force) to a torque wrench to test the accuracy of the torque set value of the torque wrench.

[0002]

2. Description of the Related Art A conventional torque wrench tester of this type, that is, a torque wrench used for tightening a screw, tests whether or not a torque wrench operates at a preset torque value preset in the torque wrench. As an example, there is a structure as shown in FIG.
That is, in this known example, in the torque wrench meter 5, a torque wrench which can be fixed to a loading lever 1 whose one end is pivotally fixed to an input shaft of the torque meter and an arbitrary position in the longitudinal direction of the lever. A lever support pin 2 and an operating mechanism 6 rotatably supported by a frame 3 integral with the torque lever casing and for rotating the loading lever 1 about a torque meter input shaft 4 as a fulcrum. By adjusting the position of the support pin 2, an operating force (load) is applied to the position of the effective length of the handle portion 7 of the torque wrench, and the accuracy of the torque value at the time of the toggle operation of the torque wrench at this time is adjusted. Is a torque wrench tester for testing with a torque wrench 5.

That is, in the load test of the torque wrench by the torque wrench tester, the head side of the torque wrench is fixed and a load is applied to a predetermined effective length position on the handle 7 side through the support pin 2 to It is used to test the torque setting of the wrench.

[0004]

However, since there are various sizes (handle length) of the torque wrench to be tested by the torque wrench tester, a load is applied to the handle portion 7 of the torque wrench. Loading lever 1 for movably holding the supporting pin 2 of the
Is set to be long so that the set torque of a wide range of torque wrenches from the long torque wrench of the handle portion 7 to the short torque wrench can be measured. In order to measure the set torque of the torque wrench, the position of the support pin 2 is moved and adjusted in the direction of the input shaft 4 to lock the support pin 2 and the handle portion 7. Therefore, the tail end portion of the loading lever 1, That is, the end portion on the side opposite to the input shaft 4 side becomes an extra length, and the tail end portion protrudes from the tip of the handle portion of the torque wrench, which becomes a hindrance during the torque value measurement work, resulting in poor measurement workability. there were.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, in which one end of a loading arm is pivotally supported on an input shaft provided in a torque wrench tester and the loading is performed. The arm has a rocker lever slidable from the other end into the loading arm, and the end of the rocker lever is equipped with a lock pin for locking the torque wrench handle. To provide a torque wrench tester having a structure in which the set torque accuracy of the torque wrench can be easily performed by one torque wrench tester.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments shown in the drawings.

2 to 4, reference numeral 11 denotes a tester main body, and an operation panel 14 having a torque setting operation button 12, a display 13 and the like on the upper surface of the tester main body 11,
A measurement input shaft 15 is provided. Reference numeral 16 denotes a loading arm whose one end is axially supported on the outer circumference of the measurement input shaft 15. The loading arm 16 is formed, for example, in a cylindrical shape, and a rocker lever 17 is provided inside the loading arm 16. Is inserted and held so as to be slidable in the axial direction. At the tail end of the rocker lever 17, a locking pin 20 that is locked to the handle portion 19 of the torque wrench 18 to be measured is provided upright. Reference numeral 21 denotes a handle rotatably supported by the tester main body 11. The handle 21 is integrally provided with a screw rod 22, and a movable body 23 is meshed with the screw rod 22, and the movable rod 23 is further movable. The body 23 is engaged with the loading arm 16.

The structure of this embodiment has been described above. Next, the operation thereof will be described. First, a predetermined set value is displayed on the display 13 by operating the setting operation button 12, and then the torque wrench to be tested is operated. The head is engaged (fitted) with the measurement input shaft 15, and the rocker lever 17 is axially moved and adjusted with respect to the loading arm 16 in accordance with the effective length (handle portion length) of the torque wrench. The locking pin 20 attached to the rocker lever 17 is positioned so as to abut the handle portion 19 of the torque wrench.

Then, by rotating the handle 21, the locking pin 20 is moved in the direction A shown in FIG. 2 through the loading arm 16 and the rocker lever 17, and the torque wrench locked by the locking pin 20 is moved. The handle portion 19 of 18 also rotates in the same direction, and the set torque value accuracy of the torque wrench associated with the rotation of the torque wrench handle portion 19 is measured (tested) by the display 13.

The torque wrench 18 shown in FIGS. 2 and 3 is relatively small, and when a torque wrench larger than the torque wrench 18 is tested, as shown in FIG. Depending on the effective length of the torque wrench, the lock pin 20 of the rocker lever 17 is connected to the measurement input shaft 1
By sliding the rocker lever 17 with respect to the loading arm 16 in a direction away from 5, the locking pin 29 can be reliably locked to the handle portion of the large torque wrench.

[0011]

As described above, according to the present invention, in the torque wrench tester having the measurement input shaft 15 fitted with the head portion of the torque wrench to be tested, the loading arm 16 pivotally supported with the input shaft 15 as a fulcrum. A rocker lever 17 held by the loading arm so as to be slidable in the axial direction of the loading arm, and a rocker lever 17 standing upright at the end of the rocker lever 17 and having a head fitted to the input shaft 15. Since the torque wrench test has the locking pin 20 that is locked to the handle of the torque wrench, according to this, the locking pin 20 depends on the size of the torque wrench to be tested (the length of the handle). Since the position of the torque wrench can be adjusted freely, the effective position of the handle of the torque wrench (force applied) is not affected by the size of the torque wrench. The measuring force can be allowed to act on).

Therefore, the set torque value of various torque wrenches of different sizes can be efficiently tested by one tester.

Further, according to the present invention, since the rocker lever can be expanded and contracted, the overall shape of the tester can be reduced in size, and the handling and test workability of the tester can be improved.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a conventional torque wrench tester.

FIG. 2 is a plan view showing a torque wrench tester according to an embodiment of the present invention.

FIG. 3 is a front view showing a torque wrench tester according to an embodiment of the present invention.

FIG. 4 is an operation explanatory view of the loading arm showing the torque wrench tester of the embodiment of the present invention.

[Explanation of symbols]

11 ... Tester main body 12 ... Operation button 13 ... Display unit 14 ... Operation panel 15 ... Measurement input shaft 16 ... Loading arm 17 ... Rocker lever 18 ... Torque wrench 19 ... Handle part 20 ... Locking pin 21 ... Handle 22 ... Screw rod 23 … Movable body

Claims (1)

[Claims] 1. A torque wrench tester having a measurement input shaft (15) fitted with a head portion of a torque wrench to be tested, and a loading arm (16) pivotally supported about the input shaft (15). A rocker lever (17) held by the loading arm so as to be slidable in the axial direction of the loading arm, and standing upright at the end of the rocker lever (17), the input shaft (1)
5) A torque wrench tester having a locking pin (20) which is locked to a handle portion of a torque wrench having a head fitted in 5).