JP2014163752A - Tensile tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tensile tester to which a test piece of a thin plate, for example, a copper foil can be easily and safely attached.SOLUTION: A tensile tester 1 includes: a pair of chuck bodies 2 and 2' arranged in a vertical direction; a pair of clamp plates 3a and 3b which are arranged on the chuck bodies 2 and 2' respectively to clamp a test piece 10; clamp plate opening/closing members 4 and 4' which open/close the pair of clamp plates 3a and 3b; and an attachment member 5 which is provided at least in the vicinity of an inside center of the upper chuck body 2 and to which the test piece 10 is to be attached. The attachment member 5 includes a suspension part 51 extending in a direction orthogonal to an opening/closing direction of the clamp plates and to the vertical direction. The attachment member 5 has such a shape as not to interfere with an insertion path of a screw on the lower side where the screw is inserted.

Description

  The present invention relates to a tensile tester.

  In general, a tensile tester is used to measure the mechanical strength of the material. This tensile tester measures tensile strength by gripping and pulling a test piece with a chuck. It has been proposed to attach a backing sheet to both ends of a film-like test piece for a tensile tester and chuck the gripping portions near the ends with upper and lower chucks of the tensile tester (Patent Document 1).

JP-A-6-18380

However, if a thin test piece is attached to a tensile testing machine as it is, it is difficult to stand upright in the vertical direction because the test piece is thin, so first hold the vicinity of the center of the test piece with both hands or one hand, for example on the air chuck When adjusting the position, it is necessary to bring a finger close to the air chuck and chuck it, which requires a skill of the operator and is a dangerous work.
Further, since many chucking mistakes of the test piece are likely to occur, many test piece samples are required.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a tensile tester capable of easily and safely mounting a thin plate test piece such as a copper foil.

  In order to solve the above-described problems, a tensile testing machine according to the present invention includes a pair of upper and lower chuck bodies, a pair of clamping plates that are disposed on the respective chuck bodies and grip a test piece, and the pair of pairs. A fastening plate opening and closing means for opening and closing the fastening plate; and an attachment member provided at least in the vicinity of the inner center of the upper chuck body and for attaching the test piece, wherein the attachment member has an opening direction and a vertical direction of the fastening plate. The suspension part extended in the direction orthogonal to the direction is included.

  The present invention further includes a fixture for fixing the attachment member to the chuck body, and the attachment member has a shape that does not cover the insertion path of the fixture on the lower side where the fixture enters. In the above invention, the attachment member has a Z-shaped angle in a substantially cross section.

  ADVANTAGE OF THE INVENTION According to this invention, the tensile tester which can attach a thin-plate test piece simply and safely can be provided.

It is a figure which shows the whole shape of the tensile testing machine of suitable embodiment of this invention. It is the figure which expanded and showed the inner side vicinity of the upper side chuck body. It is a figure which shows the state which has arrange | positioned the hook-shaped attachment member inside the chuck | zipper main body. It is a figure explaining the preparation by the side of a thin sample. It is a figure which shows an example of the attachment member used by this invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing an overall shape of a tensile testing machine 1 according to a preferred embodiment of the present invention.
As shown in the figure, a pair of chuck bodies 2, 2 ′ are arranged above and below the tensile testing machine 1. Each chuck body 2, 2 ′ is provided with a pair of clamping plates 3 a, 3 b, 3 a ′, 3 b ′ for gripping the test piece 10, and these clamping plates 3 a, 3 b, 3 a ′. 3b ′ is opened and closed by moving in the horizontal direction in the figure by the fastening plate opening and closing means 4 and 4 ′, and the test piece 10 is fastened. In such a state, a tensile test is performed by pulling the test piece 10 up and down through the chuck.

  Here, as will be described in detail later, the mounting member 5 is mounted in the vicinity of the inner center (center) of the upper chuck body 2 so as to be suitable for mounting a thin plate-shaped test piece. Similarly, the lower chuck body 2 ′ may be mounted with an attachment member 5 ′.

Next, the vicinity of the chuck body will be described in detail.
FIG. 2 is an enlarged view showing the vicinity of the inside of the upper chuck body 2. Here, the same reference numerals are given to elements common to FIG.
When the XY coordinates shown in the figure are set, the X direction is the opening / closing direction of the fastening plates 3a and 3b, and the -Y direction is the vertical direction. A suspension portion 51 described later of the mounting member 5 extends in the Z direction perpendicular to these two directions. By doing so, it becomes easy to tighten a thin sample piece that is difficult to be tightened correctly with a chuck mechanism in a manner described later. In order to mount the thread sample, as shown in FIG. 3, a hook-shaped mounting member 500 is arranged inside the chuck body 2, and the tip of the thread sample is rounded and hooked to perform chucking. It was broken.
However, the present invention solves that it is difficult to align the direction with a thin plate sample by this method.

Next, preparation of a thin plate sample will be described.
FIG. 4 is a diagram for explaining the preparation on the thin sample side, and shows a state in which the sample is sandwiched by the clip through the mount.
As shown in FIG. 4, for a thin sample 6 such as a copper foil, for example, a thickness is secured on both sides of the end portion with a mount 7, and the thickness portion is sandwiched between clips 8. As this clip 8, what is marketed as a stationery for pinching documents etc. as shown, for example in Unexamined-Japanese-Patent No. 8-267975 can be used. The distal end portion 81 of the clip 8 is pushed out toward a member that is sandwiched while being spread by a dedicated instrument, and is closed again by the elasticity of the trunk portion 82.

  At this time, a gap 84 can be generated inside the back surface portion 83 of the clip 8. The operations up to this point can be performed in a place where it is easy to work, such as on a desk. For example, when holding the sample by hand at the chuck and performing direct alignment and alignment. This can be done without causing a danger or a danger of a finger being pinched. When the suspended portion 51 of the mounting member 5 is inserted into the gap 84 of the clip 8 with respect to the test piece prepared in this way, the thin sample 6 can be arranged so as to come in the vertical direction between the clamping plates of the chuck mechanism. This prepares for correct chucking.

Next, details of the mounting member will be described.
The attachment member 5a shown in FIG. 5A is an example of a suitable attachment member in the present invention.
One end of the attachment member 5a is a screw attachment portion 53 provided with a screw hole 52 for attaching a screw 9 to be fixed to the chuck body 2, and the upper and lower surfaces thereof are flat. From here to the suspension portion 51, it becomes a progressing portion 54, which first extends slightly in the horizontal direction and then bends at an acute angle and obliquely downward, ensuring a space enough to insert the gap 84 of the clip 8. Thus, the suspension portion 51 is further bent at an acute angle and extends in the horizontal direction (z direction shown in FIG. 2). This is a Z-shape when viewed from the side, and it can be said that the cross-section is a Z-shaped angle. By doing so, a part of the mounting member 5a is not covered in the insertion direction of the screw 9 (the lower side in which the screw 9 is inserted, the broken arrow in the figure), and therefore, it becomes an obstacle when the screw 9 is inserted. There is nothing, and the screw 9 is easy to attach.

In implementing the present invention, this shape is not limited to the Z shape, and may be, for example, a key shape that extends vertically downward, bends vertically, and extends horizontally. However, there is an advantage that the length of the suspension part 51 can be increased by bending it into the Z shape.
In this figure, the attachment member 5a extends from the screw attachment portion 53 to the passage portion 54 and gradually becomes circular in cross section, and the suspension portion 51 has a round bar shape. However, the suspension part 51 may also be a square having a rectangular cross section.

  Here, for example, as in the attachment member 5d of FIG. 5 (d), when the passage portion 54 '' extends from the screw attachment portion 53 to the rear side and bends to form the suspension portion 51 horizontally in the forward direction, A part of the mounting member 5d gets in the way to insert the screw (this is indicated by a cross in the figure). In such a form, the screw is difficult to insert and difficult to turn, but the screw can be inserted by taking a method such as turning the screw head with a hexagon and a nut.

An attachment member 5b shown in FIG. 5B is obtained by further forming a recess 55 in a part of the suspension 51 in the attachment member 5a shown in FIG. As a result, the thread-like sample can be hooked and used in the recess 55 in the same manner as the hook-like attachment member 500 of FIG. Even if there is this dent 55, if the gap 84 of the clip is large enough for this dent to enter, the thin plate-like sample should be supported in the same manner as the mounting member 5a in FIG. Can do. Therefore, both the thin plate sample and the thread sample can be suitably mounted on the chuck. As described above, even if there are portions of the suspension 51 that extend in different directions, the suspension 51 includes the suspension 51 that extends in the direction perpendicular to the opening / closing direction of the fastening plate and the vertical direction. Any device that can achieve substantially the same effect as the case of extending in this direction is included in the present invention.
As the shape of the mounting member that does not cover the screw insertion path on the lower side where the screw enters, another form is also conceivable.

  For example, as in the attachment member 5c in FIG. 5C, the passage portion 54 ′ exits from the screw attachment portion 53 in the lateral direction and descends downward while bending so as to avoid the screw insertion path. In addition, the suspension part 51 may extend in a direction orthogonal to the opening / closing direction of the fastening plate and the vertical direction.

  As described above, according to the embodiment of the present invention, even when the test piece is thin and difficult to stand in the vertical direction, it avoids the skill of the operator and the danger of pinching the hand as in the case of adjusting the chuck position by hand. It is possible to prevent test piece chucking mistakes such as failure to arrive in the correct direction.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiments. Further, it is apparent from the description of the scope of claims that embodiments with such changes or improvements can also be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Tensile tester 2, 2 'Chuck main body 3a, 3b, 3a', 3b 'Clamping plate 4, 4' Clamping plate opening / closing means 5 Mounting member 51 Suspension part

Claims (3)

A pair of chuck bodies arranged above and below;
A pair of clamping plates disposed on each chuck body for gripping a test piece;
Clamping plate opening and closing means for opening and closing the pair of clamping plates;
Provided at least near the inner center of the upper chuck body, and a mounting member for mounting the test piece,
The tensile testing machine, wherein the attachment member includes a suspension portion extending in a direction orthogonal to the opening / closing direction and the vertical direction of the fastening plate. A fixture for fixing the mounting member to the chuck body;
The tensile testing machine according to claim 1, wherein the attachment member has a shape that does not cover the insertion path of the fixture on the lower side where the fixture is inserted.   The tensile testing machine according to claim 2, wherein the attachment member has a Z-shaped angle in a substantially cross section.

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