JPS6148348U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a four-point bending test jig which is an embodiment of the present invention. FIG. 2 is a plan view showing the base configuring the bending test jig shown in FIG. 1. FIG. 3 is a - sectional view in FIG. 1. 10: Base first load member, 22: Cylindrical member, 2
6: Small diameter hole, 30: Support pin positioning groove, 32
: Load pin positioning groove, 34: Test piece positioning groove, 36: Support pin, 38: Test piece, 40: Load pin, 44: Intermediate load tool, 48: Intermediate pin, 50:
Upper loading device (second loading member), 60: Ball.

Claims (1)

[Claims for Utility Model Registration] (1) Two ends of a longitudinal test piece parallel to each other.
The test piece is supported on the outer circumferential surface of a support pin, and the outer circumferential surfaces of two load pins parallel to the support pins are brought into contact with two locations separated in the longitudinal direction of the middle part of the test piece from the opposite side of the support pins. between the first load member and the support pin; and/or an intermediate load member is disposed between the second load member and the load pin, extending parallel to the support pin and/or the load pin and in line contact with the support pin and/or the load pin, and the intermediate load member an intermediate pin extending in a direction perpendicular to the support pin and/or the load pin and in line contact with the intermediate load member; A four-point bending test jig, characterized in that the load is transmitted while allowing longitudinal inclination of the support pin and/or the load pin. (2) The first load member and the second load member are capable of approaching and separating from each other in the vertical direction while maintaining relative positions in the horizontal direction, and of the first and second load members, the lower At the upper part of the first load member located on the side, two support pin positioning grooves extending parallel to each other at a fixed distance apart in the horizontal direction, and a groove spaced apart in the horizontal direction at an intermediate position between the two support pin positioning grooves. Two load pin positioning grooves are formed extending parallel to the support pin positioning grooves, and the support pin and the load pin are arranged in the support pin positioning grooves and the load pin positioning grooves, respectively, in the width direction of the positioning grooves. A test piece positioning groove is formed in the first load member at right angles to the support pin positioning groove and the load pin positioning groove and is horizontal to the support pin positioning groove and the load pin positioning groove. A four-point bending test jig according to claim 1 of the claimed utility model registration. (3) The intermediate load member is fitted into the load pin positioning groove and positioned, while the intermediate pin is fitted into the test piece positioning groove and positioned. 4-point bending test jig. (4) Utility model registration claim 1, in which the intermediate pin is arranged independently for each of the two support pins and/or the load pins.
4-point bending test jig according to any one of Items 1 to 3. (5) The utility model according to any one of claims 1 to 3, wherein one intermediate pin is provided in common for each of the two support pins and/or load pins. 4-point bending test jig.