JP2834438B2 - Torque wrench tester torque wrench handle support structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a torque wrench handle provided in a torque wrench tester, and more particularly, to measuring (verifying) a set torque value or the like of a torque wrench. The present invention relates to a support structure for a torque wrench handle used in a torque wrench tester having a structure capable of accurately measuring a torque value set in a wrench.

[0002]

2. Description of the Related Art For example, a torque wrench tester for measuring (verifying) a preset torque value of a preset type torque wrench or a scale position provided on a torque wrench with a memory is known. For example, one having a structure as shown in FIGS.
No. 92) is known.

The configuration of this known torque wrench tester will be described. A loading lever 1 having one end pivotally connected to an input shaft of a torque wrench meter, and a torque wrench lever which can be fixed at any position in the longitudinal direction of the lever. Handle part support structure 10 having support pins 2
And a frame 3 integrated with the casing of the torque lever.
The loading lever 1 is rotatably supported by the
And an operating mechanism 6 for rotating the torque wrench with the torque meter input shaft 4 as a fulcrum. The handle portion support structure 10 is moved to adjust the position of the support pin 2, and the handle portion of the torque wrench is This is a torque wrench tester that applies an operating force (load) to the position of the effective length of No. 7 and tests the torque value or the accuracy of the scale at the time of the toggle operation of the torque wrench at this time.

That is, in the load test of the set torque value of the torque wrench by the torque wrench tester, the head of the torque wrench is engaged with the input shaft 4 of the torque meter, and the torque wrench is moved to a predetermined effective length position on the handle side of the torque wrench. After adjusting the position of the handle portion support structure 10 so that the support pin 2 is positioned, the operation of the operating mechanism 6 applies a load to the torque wrench to verify the set torque or the scale accuracy of the torque wrench. It is.

However, since there are various sizes (the thickness of the handle portion 7, the vertical position) of the torque wrench for which the set torque value and the like to be verified by the torque wrench tester are various, the torque in these torque wrenches is large. At the time of verifying the value or the like, the vertical position of the handle portion 7 of the torque wrench changes (fluctuations). That is, when the head of the torque wrench is engaged with the input shaft 4 of the torque meter and the load is increased on the handle portion 7 of the torque wrench, the stress causes the center axis of the torque wrench head and the center of the input shaft 4 to increase. The head and the input shaft are fitted to each other so that the axes coincide with each other. For this reason, the axis of the handle portion 7 extending in a direction perpendicular to the axis of the torque wrench head and the axis of the loading plate 1 are parallel. Thus, the handle portion 7 is vertically moved. If the fluctuation of the handle in the vertical direction cannot be absorbed, it is impossible to perform a highly accurate test of the torque value or the like.
As shown in FIG. 4, a support ring 8 that can move up and down following a change in the vertical position of the handle portion is fitted. A coating 9 such as rubber is provided on the outer peripheral surface of the support ring 8 to increase a frictional force with the handle portion 7.

[0006]

However, there is friction between the support pin 2 and the support ring 8 fitted and supported by the support pin 2, and particularly, the handle part 7 of the torque wrench is used for verification. As the load increases, the frictional force between the support pin 2 and the support ring 8 increases due to the load force, and the sliding of the support ring 8 guided by the support pin 2 is impaired. As a result, the movement of the handle portion 7 that attempts to make the axis of the torque wrench handle portion 7 parallel to the axis of the loading plate 1 is impaired, and the center axis of the head portion of the torque wrench and the center axis of the input shaft 4 are not parallel. Since the test is performed in a state (a state where the axis of the head portion is inclined with respect to the axis of the input shaft), it is difficult to accurately measure the test such as the set torque value in the torque wrench.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and the handle portion of a torque wrench to be measured set in a torque wrench tester is engaged with a support pin of the torque wrench tester with an extremely small frictional force. An object of the present invention is to develop a torque wrench tester having a force absorbing structure and capable of accurately measuring a set torque value and the like in a torque wrench.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a loading plate provided on a torque wrench tester is slidable in the axial direction of the loading plate. In a torque wrench tester having a handle portion support body that stands and holds a support pin engaged with a handle portion of a torque wrench to be measured, a pole ring is fitted to an outer peripheral surface of the support pin via a cylindrical bearing member. In addition, the pole ring has a torque wrench handle portion support structure of a torque wrench tester that is received by a leaf spring member that can be locked at any position in the vertical direction of the support pin. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in FIGS. FIGS. 1 and 2 show a torque wrench handle support which is held by a loading arm 1 provided in a conventional torque wrench tester. Since the mechanism of the torque wrench tester can be used and is not the gist of the present invention, the description of the structure of the torque wrench tester is omitted.

Reference numeral 11 denotes a slider slidably supported along the axial direction of the loading plate 1 provided on the torque wrench tester. The slider 11 is fixed by a fastening screw 12 to the slider 11.
It can be fixed at any position on the loading plate 1 according to the length of the handle portion 7 of the torque wrench to be measured.

A support pin 13 is fixed to an end of the slider 11 opposite to the screwed end of the fastening screw 12 by a planting means in an upright state. A pole ring 14 is fitted on the outer peripheral surface of the support pin 13, and the inner peripheral surface of the pole ring 14 is used to minimize frictional resistance with the outer peripheral surface of the support pin 13. Bearing member 15
The pole ring 14 is attached to the support pin 1
3 is configured to be able to move smoothly in the axial and circumferential directions with low frictional force. The bearing member 15 may be, for example, a non-lubricated member or a bearing using an oilless method.

Reference numeral 16 denotes two leaf spring ends 16A and 16 having through holes through which the support pins 13 are inserted, that is, through holes 17 having a hole diameter slightly larger than the outer diameter of the support pins 13.
The leaf spring member 16 is formed in a U-shape at a substantially central portion thereof, and the above-mentioned pole ring 14 is attached and fixed to a tip 16C thereof. Reference numeral 18 denotes a stopper that is locked to the upper end of the support pin 13 and that prevents the pole ring 14 from coming off.

The above is the support of the torque wrench handle portion according to the present embodiment. Next, the operation will be described. First, the fastening screw 12 is operated so that the length of the handle portion of the torque wrench to be measured is measured. In response to the above, the torque wrench handle support is moved and adjusted along the longitudinal direction of the loading arm 1. Thereafter, the head of the torque wrench to be measured is fitted (engaged) to the measurement input shaft of the torque wrench tester, and the handle of the torque wrench is placed on the leaf spring 16 of the torque wrench handle support. .

Then, by operating the torque wrench tester,
When the loading arm 1 is rotated, the pole ring 14 supported by the support pin 13 with this operation causes
The handle portion 7 of the torque wrench is pushed in the direction F in FIG. 1, and as a result, the set torque value of the torque wrench accompanying the pushing of the handle portion of the torque wrench is measured and displayed by the display of the torque wrench tester. is there.

In the torque wrench handle portion support having such a structure, the support for supporting the handle portion 7 of the torque wrench is a leaf spring 16, and furthermore, a rotational force is applied to the handle portion 7. The support pin 13 is provided with a pole ring 14 that can smoothly move in the thrust direction and the radial direction via a bearing member 15, and the moving force of the support pin 13 is applied to the torque wrench handle portion 7 via the pole ring 14. The torque wrench handle portion which is generated during the torque value measuring operation of the torque wrench hardly generates frictional force between the torque wrench handle portion 7 and the support pin 13 because the torque wrench handle portion 7 is actuated. Smoothly, that is, the movement of the axis of the handle portion of the torque wrench to be parallel to the axis of the loading arm. Door can be.

Therefore, when the torque value of the torque wrench is measured, the torque wrench is a support for the handle portion which can follow the displacement of the handle portion generated in the torque wrench. Therefore, the set torque value and the like of the torque wrench can be accurately measured. Can be.

When a pair of leaf spring ends 16A and 16B provided on the leaf spring member 16 is pinched and the two leaf spring ends 16A and 16B are operated to approach each other, the transparent spring provided on the leaf spring 16 is moved. Since the locking force between the edge of the hole 17 and the peripheral surface of the support pin 13 is released, both leaf spring ends 16A, 16A
It is easy to move the pole ring 14 in the axial direction of the support pin 13 while the pin B is being pinched, and if the pinch force of the spring ends 16A and 16B is released at a desired position, the spring ends 16A and 16B can be removed.
The hole of the through hole 17 and the support pin 13 are locked by the restoring force of 16B, and the pole ring 14 can be locked and held at an arbitrary position. Therefore, when the thickness of the handle portion of the torque wrench to be measured is significantly different, it becomes easy to adjust the vertical position of the predictive pole ring 14 in advance according to the thickness of the handle portion.

[0018]

As described above, by using the torque wrench handle support of the present invention, the frictional force between the support pin 13 provided on the torque wrench tester and the handle of the torque wrench to be measured. Can be made extremely small, whereby the measuring force generated by the torque wrench tester can be effectively transmitted as the acting force on the torque wrench, whereby the set torque value given to the torque wrench to be measured is reduced. Alternatively, a scale value or the like can be measured with high accuracy.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing an embodiment of a torque wrench handle support structure according to the present invention.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is an explanatory plan view showing a conventional torque wrench tester.

FIG. 4 is a partially sectional explanatory view showing a conventional wrench handle support.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Slider 12 ... Fastening screw 13 ... Support pin 14 ... Pole ring 15 ... Bearing member 16 ... Leaf spring member 17 ... Through-hole 18 ... Stopper

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-110277 (JP, A) JP-A-50-63983 (JP, A) Jikai 49-94681 (JP, U) (58) Survey Field (Int.Cl. ⁶ , DB name) G01L 5/24 B25B 23/14 640

Claims (1)

(57) [Claims] 1. A loading plate (1) provided on a torque wrench tester, which is slidable in the axial direction of the loading plate (1) and is engaged with a handle (7) of a torque wrench to be measured. Support pin (1
In a torque wrench tester having a handle portion support for standing and holding 3), a pole ring (1) is provided on the outer peripheral surface of the support pin (13) via a cylindrical bearing member (15).
4) and the pole ring (14) is
A support structure for a torque wrench handle part of a torque wrench tester, wherein the support pin (7) is received by a leaf spring member (16) which can be locked at any position in the vertical direction.