JPH0536347U - Rubber roller shaft pull-out tester - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to easily cope with the expansion of the usage range. The insert portion is formed with a lower plate notch 8 having a predetermined diameter in the center of the lower plate 7a and having an opening at the edge of the lower plate 7a. Replaceable test piece fixing jig 9 having a notch 9a that substantially matches the outer diameter of the shaft 1 of the rubber roller inserted into the fixing roller, and a fixing jig for fixing the fixing jig 9 to the lower plate notch 8 part. Toukyu 1
0 and 0 are provided. [Effect] The rubber roller shaft can be easily attached and detached, and the range of use of the device can be expanded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rubber roller shaft pull-out test device.

[0002]

[Prior Art]

 A rubber roller is shown in FIG. As shown in the figure, the rubber roller used for the shaft pull-out test includes a shaft 1, a core metal 2 fixed to the outside of the shaft 1, and a rubber 3 fixed to the outside of the core metal 2. It is composed of.

The rubber roller configured as described above is usually used as a paper feeding unit of various information devices, and conveys a paper by the frictional force of the rubber 3 as the shaft 1 rotates.

As shown in FIG. 4, a conventional example of a rubber roller shaft pull-out test device for pulling the shaft 1 out of the rubber roller is, as shown in FIG. 4, an upper chuck support 4 for chucking the test device to a tensile tester, and an upper plate for supporting a column 5. 6, a lower plate 7 for supporting the rubber roller shaft, and the like. The upper chuck receiver 4 of the device is chucked to the chuck part of the tensile tester, the rubber roller shaft is inserted into the central hole of the lower plate 7, and the tensile tester pulls in the direction perpendicular to the axis to maximize the rubber roller and shaft. The pulling force is measured with a tensile tester.

[0005]

[Problems to be solved by the device]

The above-mentioned prior art is not easy because the insertion part of the lower plate for fixing the rubber roller shaft is only provided with, for example, a φ8 hole, and a matching device is searched for each time according to the outer diameter of the shaft for measurement. . Even if the shaft outer diameter is φ8 or less, particularly when the rubber roller material has a low hardness (H _S 50 ° or less), it is bitten into the φ8 hole when pulled, and a correct measured value cannot be obtained.

[0006] Furthermore, it is not easy to attach and detach the test piece because the space between the support columns is small, and the test is performed by cutting the shaft one by one when the length of the test body becomes 200 mm or more. However, there was a dislike of setup loss and increased test man-hours.

The present invention has been made in view of the above points, and an object of the present invention is to provide a rubber roller shaft pull-out test device capable of easily responding to the expansion of the usage range.

[0008]

[Means for Solving the Problems]

 The purpose of the above is to form the insertion part with a predetermined diameter in the center of the lower plate and to have the lower plate notch opened at the edge of the lower plate and to insert it into the lower plate notch. Provided with a replaceable specimen fixing jig having a notch that approximately matches the outer diameter of the rubber roller shaft, and a fixing jig receiver that fixes this fixing jig to the lower plate notch. This will be achieved.

[0009]

[Action]

 Since the above means is provided, the rubber roller shaft of the test body can be inserted into the lower plate through the opening on the side surface of the lower plate notch, and the shaft inserted in the lower plate notch has a notch that is approximately the same as the outer diameter. It will be fixed via a replaceable test piece fixing jig.

[0010]

【Example】

 Next, the present invention will be specifically described with reference to examples.

[Embodiment 1] FIGS. 1 and 2 show an embodiment of the present invention. Since the same parts as those in the conventional art are designated by the same reference numerals, the description thereof will be omitted. In the present embodiment, the insertion portion is formed with a lower plate notch 8 having a predetermined diameter in the central portion of the lower plate 7a and having an opening at the edge of the lower plate 7a. A replaceable specimen fixing jig 9 having a notch 9a that substantially matches the outer diameter of the shaft 1 of the rubber roller inserted in the plate notch 8, and this fixing jig 9 at the lower plate notch 8 part. And a fixing jig receiver 10 for fixing to. By doing so, the rubber roller shaft of the test body can be inserted into the lower plate 7a through the opening on the side surface of the lower plate notch 8, and the shaft 1 inserted in the lower plate notch 8 can be cut into a shape that substantially matches the outer diameter. It is now fixed through a replaceable test piece fixing jig 9 that has a cutout 9a, which makes it easy to attach and detach the rubber roller shaft, and expands the range of use of the device. It is possible to obtain a rubber roller shaft pull-out test device that can easily cope with expansion.

That is, when the pulling force of the rubber roller shaft is measured by the apparatus according to the present embodiment, the upper chuck receiver 4 is attached to the tensile tester, and the shaft 1 of the rubber roller is fixed to the test body fixing jig that substantially matches the outer diameter of the shaft. 9, and after fixing it to the lower plate 7a via the fixing jig receiver 10, attach the shaft 1 to the tensile tester and pull it in the direction of the arrow in the figure to measure the maximum pulling force of the rubber roller and shaft 1. ..

As described above, according to the present embodiment, if the test body fixing jig is changed, the use range is expanded to the shaft outer diameters φ3 to φ10 with one insertion portion, so that the pulling force can be accurately measured. became. Also, the test piece can be easily attached and detached, and the number of test steps can be significantly reduced.

[0014]

[Effect of the device]

 As described above, according to the present invention, the insertion part is formed with a lower plate notch having a predetermined diameter at the center of the lower plate and having an opening at the edge of the lower plate. A replaceable fixture for the test piece that has a notch that approximately matches the outer diameter of the rubber roller shaft inserted in the notch, and a fixture jig receiver that fixes this fixture to the lower plate notch. Since the rubber roller shaft of the test piece can be inserted into the lower plate through the opening on the side surface of the lower plate notch, the shaft inserted in the lower plate notch has a notch that approximately matches its outer diameter. Since it is now fixed through a replaceable test fixture, the rubber roller shaft can be easily attached and detached, and the range of use of the device can be expanded. Possible rubber roller shaft pull-out test equipment It is possible to obtain.

[Brief description of drawings]

1 shows an embodiment of a rubber roller shaft pull-out test device of the present invention, (a) is a vertical sectional side view showing a state in which a rubber roller shaft is mounted, and (b) is a top view of the device.

2A and 2B also show a test body fixing jig of one example, FIG. 2A is a front view and FIG. 2B is a side view.

FIG. 3 is a vertical sectional side view of a rubber roller shaft.

4A and 4B show a conventional rubber roller shaft pull-out test device, in which FIG. 4A is a vertical sectional side view, and FIG. 4B is a top view of FIG.

[Explanation of symbols]

 1 Shaft 4 Upper chuck receiver 5 Support 6 Upper plate 7a Lower plate 8 Lower plate notch 9 Specimen fixing jig 9a Notch 10 Fixing jig receiver

Claims (1)

[Scope of utility model registration request] 1. An upper chuck receiver to be chucked in a tensile tester, and the chuck receiver fixed to the upper part thereof,
An upper plate that supports one end of the column and a lower plate that is arranged to face the upper plate and that supports the other end of the column are provided, and the lower plate is provided with an insertion portion for inserting and fixing the shaft of the rubber roller. In the rubber roller shaft pull-out test device, the insertion portion is formed with a lower plate notch having a predetermined diameter at the center of the lower plate and opening at the edge of the lower plate. In addition, a replaceable test piece fixing jig having a notch that substantially matches the outer diameter of the shaft of the rubber roller inserted in the lower plate notch, and this fixing jig is fixed to the lower plate notch A device for pulling out a rubber roller shaft, which is provided with a fixing jig receiver.