JPS5822119Y2 - Test piece chuck device in tensile testing machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a chuck device used to set mainly plate or film-like test specimens in a tensile testing machine.It has an extremely simple structure and can reliably handle thin film-like specimens. To obtain a chuck device which is easy to manufacture and process, is inexpensive, and easy to handle without being gripped and detached during a test.

The invention will now be described with reference to the accompanying drawings.

Reference numeral 1 denotes a mounting piece 1a which is the main body of a chuck to be attached to a testing machine, and its gripping surface 2 is formed into a flat surface.

Reference numeral 3 designates a clamping piece used in combination with the chuck main body 1. Its clamping surface 4 is also formed flat and faces the clamping surface 2, and the chuck main body 1 and clamping piece 3 are linked by being bent on both sides. The link piece 5 was connected at its base to the chuck main body 1, and its tip was pivoted to the clamping piece 3 with its tip inclined in the tensile direction during the tensile test.

In FIGS. 1 and 2, 7 is a finger piece protruding from the chuck main body 1 and the clamping piece 3. By pulling these together with your fingers, both the biting surfaces 2 and 4 are opened and the test piece a is bitten. made things easier.

Reference numeral 7 denotes a tension spring 9 that pulls the link piece 5 in its inclination direction, and this spring 7 acts particularly in the direction of increasing the gripping force of the test piece a, but it is not intended for this purpose, for example, in the present invention. When the chuck is used upside down in the illustrated example, the clamping piece 3 will move against the chuck main body 1 due to its weight.
The main purpose is to prevent movement away from the object.

The embodiment shown in FIGS. 3 and 4 is equipped with a presser 8 for holding the clamping piece 3 in a gripping state in place of the tension spring 7 in the previous embodiment, and It is screwed in so that it can be moved forward and backward from the chuck main body 1 by rotation, and the clamping piece 3 is pressed by its advancement.

In the embodiment shown in FIGS. 1 and 3 above, the chuck main body 1 and the clamping piece 3 are connected by two parallel link pieces 5, so that the clamping piece 3 always moves parallel to the gripping surface. However, parallel movement is not necessarily required, and it may be connected by a single link piece 5 as shown in Fig. 5. In this case, the chain line in the figure As shown in , the gripping piece 3 is freely inclined with respect to the chuck main body 1, so that when gripping, for example, a specimen with an inclined gripping portion, the gripping piece 3 has the advantage of being able to grip firmly along the slope. be.

Further, in each of the above embodiments, the gripping surfaces 2 and 4 of the chuck main body 1 and the clamping piece 3 were formed into rough surfaces with small irregularities, but instead of this, a non-slip plate piece such as rubber was formed. As will be described later, the occlusal action according to the present invention does not require the above-mentioned machining of the occlusal surface.
, 4 are constructed with flat surfaces, which provide sufficient gripping action.

This chuck device performs the test by clamping one end of the test specimen a between the chuck main body 1 and the clamping piece 3, but in the case of the present invention, the clamping surfaces 2 and 4 are both configured to be flat and aligned with each other. As a result, the specimen a is gripped by the surface pressure, so the gripping force is extremely strong.Moreover, since the link piece 5 is connected by the link piece 5 inclined in the tensile direction, the surface pressure by the clamping piece 3 increases in proportion to the increase in tensile stress. The pressure is increased to increase the occlusal force, and it has the feature of ensuring the occlusal of thin film specimens, which were difficult to occult in the past. For example, although there is some deviation in the connection part of the link piece 5, the occlusal surfaces 2 and 4 fit better against the test piece a, which has the effect of simplifying manufacturing, and is an extremely simple and inexpensive device. It has enough characteristics to achieve its purpose.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of the implementation of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a side view showing another embodiment, Fig. 4 is a front view thereof, and Fig. 5 is a further embodiment of the invention. It is a side view which shows a modification. 1... Chuck main body, 3... Clamping piece, 2, 4...
Biting surface, 5...link piece.

Claims (1)

[Scope of utility model registration request] The gripping surface 2 of the chuck main body 1 and the gripping surface 4 of the clamping piece 3 are made to face each other in a plane, and the tip of the link piece 5 whose base is pivoted to the chuck main body 1 is inclined in the bowing direction during the test. A chuck device for a test piece to be applied to a tensile testing machine, which is pivoted to a clamping piece 3.