JP2566205Y2 - Bending tester - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending test machine for supporting a test piece with a pair of supports and loading the test piece.

[0002]

2. Description of the Related Art A bending tester of this kind includes a pressing punch provided on a crosshead side of a tester main body, and a pair of support tables provided on a main body table side so as to be separated from and approachable to each other. The bending test is performed by placing both ends of the test piece on these supports and lowering the press punch, and pressing the press punch against the test piece.

[0003]

However, in the above-described conventional bending tester, when a bending test is performed and a test piece is loaded, fragments of the test piece may adhere to the support. . Performing a bending test on the next test piece with the test piece fragments attached may affect the test data because the test piece may not be mounted on the support in the specified state. Need to be cleaned to remove debris as appropriate. In addition, if the test piece is broken by the bending test, the test piece falls freely and separates from the support table,
Since the test piece remains on the support when the test piece is not broken, it is necessary to collect the test piece which has not been broken by the bending test of the next test piece from the support. Conventionally, the fragments attached to the support or the test pieces remaining without being broken have been manually cleaned or collected by the operator, which has been troublesome and time-consuming.

An object of the present invention is to provide a bending test machine capable of easily and quickly cleaning a support table and collecting test pieces.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a bending test machine in which a test piece is held at the tips of a pair of support tables provided so as to be detachable from each other, and the held test piece is loaded. The above object is achieved by providing an extruding device which moves in conjunction with each of the pair of supports and removes a test piece supported by each of the supports with an extruding rod. Here, a brush for cleaning the support base may be provided on the pushing rod.

[0006]

When a piece of the test piece remains on the support table or when the test piece remains on the support table without being broken, the test piece and its fragments are removed from the support table by the extrusion rod of the extruder.

[0007]

1 to 4 show an embodiment of a bending tester according to the present invention. FIG. 1 is a perspective view showing only a main part, and FIG. 2 is a schematic view mainly showing a support table. FIG. 3 is a front view, FIG. 3 is a plan view, and FIG. 4 is a side view.

In these figures, a support base 2 is mounted on a main body table 1 of a bending tester, and a pair of support bases 3a and 3b are provided on the support base 2. More specifically, as shown in FIG. 1, a pair of rails 4 are laid in parallel on a support base (not shown in FIG. 1) 2, and a pair of movable plates 5a,
5b is erected and supported movably along the direction in which the rail 4 is laid. The support bases 3a and 3b are fixed on the movable plates 5a and 5b, respectively, and are provided to face each other along the direction in which the rails 4 are laid. Support stand 3
a and 3b are bases 6a fixed to the movable plates 5a and 5b,
6b, and wedge-shaped support portions 7a, 7b projecting upward from the base portions 6a, 6b. Each movable plate 5a, 5b
Has a pair of screwing cylinders 8a having screw holes of different screwing directions (only one cap nut 8a is shown in FIG. 1).
Are fixedly mounted via mounting members 17a and 17b, and these screwing cylinders 8a have a pair of screw rods having screwing directions (that is, different screwing directions from each other) to be screwed to the respective screwing cylinders 8a. 9a and 9b are screwed respectively. Each screw rod 9
a and 9b are connected via a coupler 10, and a drive shaft of a motor 11 is connected to an end of one screw rod 9b. Therefore, when the screw rod 9b is rotationally driven by the motor 11, the screw rods 9a, 9b rotate integrally, and the screw rods 9a, 9b have different screwing directions. Therefore, the movable plate 5a, 5b moves away or approaching. Thereby, the support bases 3a and 3b can be separated from each other.

The movable plates 5a and 5b have a bracket 12
Specimen extruders 13a and 13b are attached via a and 12b. Since the configurations of the left and right extruders 13a and 13b are exactly the same, the following description will be made on the left extruder 13a as a representative. The extruder 13a is
An air cylinder 14a, a push rod 15a which is an operating rod of the air cylinder 14a, and a brush 16a provided at a tip of the push rod 15a are provided. The push rod 15a is provided on a support 3a fixed to the common movable plate 5.
It can be extended from a position that does not hinder the bending test (the position shown in FIG. 1) that is sufficiently away from the test stand mounted on the tip (upper end) T of the support 3 a by the push rod 15 a. It has been. At this time, brush 1
The length of the bristle and the like are selected so that 6a is in sliding contact with the tip T of the support portion 7a. Compressed air is supplied to the air cylinder 14a from a control device (not shown), and the expansion and contraction of the pushing rod 15a, which is a rod thereof, is controlled.

Returning to FIGS. 2 to 4, reference numeral 20 denotes a pressurizing punch provided on the crosshead side of the tester main body so as to be able to move up and down.
Reference numeral 1 denotes a test specimen collection box arranged in front of the support base 2 (left side in FIG. 4).

In order to perform a bending test using the bending tester having the above-described configuration, first, the motor 11 is rotated to adjust the distance between the support tables 3a and 3b, and then shown in FIGS. As described above, the test piece TP is mounted on the support portions 7a and 7b of the support bases 3a and 3b, and both ends of the test piece TP are supported on the support bases 3a and 3b.
3b. Next, the pressing punch 20 is lowered to press the central portion of the test piece TP, and the test piece TP may be loaded. Thereafter, when the test piece TP breaks due to the bending load and a piece of the test piece TP adheres to the vicinity of the tip T of the support portions 7a and 7b, the air cylinder 1 of the extruding devices 13a and 13b is used.
4a, 14b to supply compressed air to push rods 15a,
The brush 15a is extended in the direction indicated by the arrow A in FIGS. 1 and 4, and the brushes 16a, 16b are brought into sliding contact with the tips T of the supports 7a, 7b to clean the vicinity of the tips T. In addition, the test piece TP
Also remains between the supports 3a and 3b without breaking,
Similarly, the air cylinders 14a of the extrusion devices 13a, 13b,
14b to supply compressed air to push rods 15a, 15b
The test piece TP is pushed forward by the push rods 15a and 15b and dropped into the collection box 21 (arrow B in FIG. 4).

Therefore, according to this embodiment, the test piece T
When the fragments of P adhere to the supports 3a and 3b,
If P remains on the supports 3a, 3b without breaking, the extruding rods 15a, 15b can be extended to clean the supports 3a, 3b and collect the test pieces TP. Cleaning of the table and collection of test pieces can be performed. Supports 3a, 3b and push rods 15a, 15b
In addition, since the brushes 16a and 16b move together with the movable plates 5a and 5b, it is possible to clean the support and collect test specimens regardless of the distance between the supports 3a and 3b.

The details of the bending tester of the present invention are not limited to the above-described embodiment, and various modifications are possible. As an example, the embodiment is applied to a three-point bending tester, but may be applied to a four-point bending tester or the like.
Further, in one embodiment, if a motor is interposed between the air cylinder and the pushing rod and the brush is rotated at the time of pushing out the test piece and at the time of cleaning the support, the cleaning effect is further enhanced. Furthermore, if the extruding device of one embodiment is provided on the gripping teeth of the tensile tester,
It is convenient to remove the test piece after the tensile test and clean the tooth surface of the gripping teeth at the same time.

[0014]

As described above in detail, according to the present invention, when a fragment of a test piece adheres to a support or when a test piece remains on the support without breaking, the extruding rod of the extrusion device is used. Thus, the support can be cleaned and the test piece can be collected, so that the support can be cleaned and the test piece can be easily and quickly cleaned. Since the push rod and the support cleaning brush move in conjunction with the pair of supports, the object can be achieved regardless of how the distance between the supports is adjusted.

[Brief description of the drawings]

FIG. 1 is a view showing a bending test machine according to an embodiment of the present invention, and is a perspective view showing only a main part.

FIG. 2 is a front view showing the vicinity of a support table of the bending test machine according to one embodiment.

FIG. 3 is a plan view of the same.

FIG. 4 is a right side view of the same.

[Explanation of symbols]

 T Tip TP Test piece 3a, 3b Support 7a, 7b Support 13a, 13b Extruder 14a, 14b Air cylinder 15a, 15b Extrusion rod 16a, 16b Brush

Claims (2)

(57) [Scope of request for utility model registration] 1. A bending test machine for holding a test piece at a tip portion of a pair of support tables provided so as to be detachable from each other and loading the held test piece, wherein: A bending test machine comprising: an extruding device that moves in conjunction with each other and removes a test piece supported by each support with an extruding rod. 2. The bending tester according to claim 1, wherein
The bending tester according to claim 1, wherein a brush for cleaning a support base is provided on the push rod.