JPH0733989B2 - Reinforcement cloth tensile test sample mounting method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a sample for a tensile test of a reinforcing cloth used as a core material of a belt or the like, and more specifically, to prevent stress from concentrating on the grip portion of the reinforcing cloth during the tensile test. The present invention relates to a method of attaching a sample for a reinforcing cloth tensile test, which is held in No. 1.

[0002]

2. Description of the Related Art In a tensile test (JIS, K6322) of a reinforcing cloth (sample) used as a core material of a belt or the like, the reinforcing cloth clamped in the clamp portion of the tester was cut at the gripping portion during the tensile test. It is specified that measurement values of test pieces are excluded.

[0003]

However, in the conventional sample mounting jig for the tensile tester, the structure is such that the sample is automatically tightened when a load is applied to the holding part. Stress concentrates on the sample (the clamp part digs into the sample) and the sample is cut at the gripping part.
There was a problem that it did not meet the tensile test standard of.

Further, there has been a problem that a lot of labor and time are required for attaching and detaching a conventional sample, and workability and work efficiency are extremely poor. The present invention has been devised by focusing on such a conventional problem, and the purpose thereof is to hold the grip of the reinforcing cloth main body so as not to concentrate stress during the tensile test, and to cut at the grip part. The present invention provides a method for attaching a sample for a reinforcing cloth tensile test, which can prevent the above-mentioned problems and can be tested so as to comply with the JIS tensile test standard.

[0005]

In order to achieve the above object, the present invention provides a support member provided on an upper and lower clamp which is slidable in the vertical direction, and a support member which is detachably supported by the support member and is provided at a central portion. It consists of a mounting jig with a slit for inserting the reinforcing cloth body, inserts the terminal part of the reinforcing cloth body into the slit for inserting the mounting jig, and winds it, and installs the mounting jig on the upper and lower clamps. The gist of the present invention is that the stress is not concentrated on the grip portion of the reinforcing cloth main body by setting it on the supported support member and pulling it in the vertical direction, and the reinforcing cloth main body is cut at substantially the center.

[0006]

The present invention is configured as described above, and both end portions of the reinforcing cloth body are inserted into the insertion slits of the mounting jig and wound and set, and the mounting jig is engaged in this state. The upper clamp and the lower clamp which are slidable in the vertical direction in advance by engaging the concave locking portion of the support member which is sandwiched by the chucks of the upper clamp and the lower clamp, and then at least one of the upper clamp and the lower clamp by the control device. By performing a tensile test by applying a load in a direction in which they are separated from each other, it is possible to prevent cutting at the grip portion and perform a test so as to comply with the JIS tensile test standard.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a schematic front view of a reinforcing cloth tensile tester, in which guide rods 3a and 3b are arranged in parallel on a support column 2 standing on a base 1.
The a and 3b are provided with an upper clamp 4a and a lower clamp 4b which can be raised and lowered by a driving means (not shown). Further, 5 is an upper clamp 4a and a lower clamp 4b.
The switch for raising and lowering is shown.

The upper clamp 4a and the lower clamp 4
In the center of the bottom face opposite to b, an openable / closable chuck 6 is provided.
a and 6b are attached to the chucks 6a and 6b via a supporting member 7 as shown in FIGS.
Also, a mounting jig 8 for the reinforcing cloth body W (sample) as shown in FIG. 5 is detachably mounted. The support member 7 is composed of a T-shaped gripping portion 9 so that it can be clamped by the chucks 6a and 6b, and a concave locking portion 10 that locks the attachment jig 8, and the T-shaped gripping portion. Cushion rubbers 11 are attached to both side surfaces of 9 for cushioning when they are clamped by the chucks 6a and 6b.

The attachment jig 8 for the reinforcing cloth body W (sample) as shown in FIGS. 4 and 5 has a round bar-shaped central portion 12
And a plate-shaped engaging portion 13 that engages with the concave locking portion 10 so as not to rotate, and a reinforcing cloth body W (sample) is provided in the round bar-shaped central portion 12. An insertion slit 14 that is inserted and wound is formed. Then, at the time of the tensile test of the reinforcing cloth main body W, both end portions of the reinforcing cloth main body W are inserted into the insertion slit 1 of the attachment jig 8 as shown in FIG.
4 so as to be wound around about 1 turn and set so as not to come off, and in this state, the engaging portion 13 of the mounting jig 8 is previously held between the chucks 6a and 6b, and the supporting member 7 is held in a concave shape. Engage with section 10.

In this state, at least one of the upper clamp 4a and the lower clamp 4b, in this embodiment, the lower clamp 4b is fixed by a control device (not shown), and the upper clamp 4a is loaded in a direction in which they are separated from each other. It is operated to perform a tensile test, but the upper clamp 4a
Then, the lower clamp 4b may be simultaneously operated while applying a load in a direction in which the lower clamp 4b and the lower clamp 4b are separated from each other, and a tensile test may be performed.

At this time, since both end portions of the reinforcing cloth body W are inserted and supported by the insertion slits 14 of the attachment jig 8, stress concentrates on the grip portion (insertion portion) of the reinforcing cloth body W. The reinforcing cloth body W without cutting, therefore without cutting at the gripping part
It is possible to carry out a test conforming to the JIS tensile test standard as a result of cutting at a substantially central portion in the longitudinal direction.

In the above embodiment, the upper clamp 4a
And chucks 6a and 6b provided on the lower clamp 4b,
Although the support member 7 is configured separately, the support member 7 is not limited to such a configuration, and the support member 7 having the above configuration may be integrally configured under the chucks 6a and 6b.

[0013]

As described above, according to the present invention, both end portions of the main body of the reinforcing cloth are inserted into the insertion slits of the mounting jig and are wound and set. In this state, the engaging portion of the mounting jig is set. , After engaging with the concave locking portion of the support member held in advance by the chucks of the upper clamp and the lower clamp that are slidable in the vertical direction, at least one of the upper clamp and the lower clamp is mutually controlled by the control device. Since a tensile test is performed by operating while applying a load in the direction of separation, stress does not concentrate at the grip of the reinforcing cloth body during the tensile test, and therefore cutting at the grip of the reinforcing cloth body is prevented, and the JIS tensile It is possible to perform a test that conforms to the test standard, and it is possible to significantly improve workability and work efficiency without requiring much labor and time for attaching and detaching the reinforcing cloth body.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a tensile test embodying the present invention.

FIG. 2 is a front view of a support member embodying the present invention.

FIG. 3 is a side view of a support member embodying the present invention.

FIG. 4 is a side view of a mounting jig provided with an insertion slit.

[Fig. 5] Fig. 4 showing a state in which a reinforcing cloth body is wound around a mounting jig.
FIG. 9 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

4a Upper clamp 4b Lower clamp 7 Support member 8 Mounting jig 9 T-shaped gripping portion 10 Recessed locking portion 14 Slit for insertion W Main body of reinforcing cloth (sample)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-58337 (JP, A) SAIKAI 57-72145 (JP, U)

Claims (1)

[Claims] 1. Both ends of the reinforcing cloth main body are inserted into the insertion slits of a mounting jig and wound and set,
In this state, the engaging part of the mounting jig is engaged with the concave locking part of the support member that is previously sandwiched by the chucks of the upper clamp and the lower clamp that are slidable in the vertical direction. A method of attaching a sample for a reinforcing cloth tensile test, comprising performing a tensile test by operating at least one of a clamp and a lower clamp while applying a load in a direction in which they are separated from each other.