JPH0592696U - Adhesion force tensile tester - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a sticking force tensile tester that is small and lightweight, is easy to carry, and is capable of accurately measuring the sticking force of a test body. [Structure] A tension screw shaft having a hooking jig provided at one end for hooking and holding the head of a test body planted on a fixed surface such as a wall or floor, and a screw part at the other end, and the screw part. A rotary member that is screwed into, a piston member that rotatably supports the rotary member, and through which the tension screw shaft penetrates, and a cylinder member that slidably fits and holds the piston member,
A reaction force table that fixedly supports the cylinder member with respect to the fixing surface; a transmission medium that is interposed between the cylinder member and the piston member and that transmits the reaction force from the cylinder member to the piston member; And an indicator that operates based on the change of the transmission medium to display the tensile force applied to the tension screw shaft.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides tensile strength of anchor bolts and anchor nails that are planted on a fixed surface such as a wall or floor, and adhesive and peeling strength of tiles and mortar that are adhered to the fixed surface with an adhesive. The present invention relates to a sticking force tensile tester for measuring.

[0002]

[Prior Art]

 As a conventional sticking force / tensile tester of this type, for example, there is one as shown in FIG. In FIG. 4, reference numeral 30 is a reaction force base having three to four legs, and a hydraulic jack 31 is fixedly installed on the upper surface of the reaction force base 30. Reference numeral 32 denotes a tension screw shaft that penetrates the central portion of the hydraulic jack 31. A gripping jig 33 for gripping a test body S such as an anchor bolt is provided at one end thereof, and a nut is provided at the other end. 34 is screwed together, and is fixed by tightening with a nut 34 thereof, and the tension screw shaft 32 is formed integrally with the piston 35 of the hydraulic jack 31. A manual hydraulic pump 37 is connected via a hydraulic hose 36 to a hydraulic chamber of a hydraulic jack 31 formed by a piston 35 and a cylinder. Then, a hydraulic pressure is generated in the hydraulic chamber by manually operating the operating lever 38 of the hydraulic pump 37, the tensile screw shaft 32 is pulled by the hydraulic pressure to pull the test body S, and the tensile screw is pulled based on the magnitude of the hydraulic pressure. The tensile force applied to the shaft 32 is displayed by the hydraulic pressure gauge 39.

[0003]

[Problems to be solved by the device]

 However, in the sticking force tension tester having the above-described configuration, the hydraulic jack 31 and the hydraulic pump 37 are separately configured, and both are connected by the hydraulic hose 36. Especially when the test body S is fixed to a wall or ceiling, two operators, one having the hydraulic jack 31 and one having the hydraulic pump 37 are required, which is uneconomical and uneconomical. Not only that, but there was the problem that it was inconvenient to carry.

The present invention has been made in order to solve the above-mentioned conventional problems, and by providing all the functions integrally with the tension screw shaft, the device is small and lightweight and easy to carry. Moreover, it is an object of the present invention to provide a fixing force tensile tester capable of accurately measuring the fixing force of a test body.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object of the present invention, the sticking force / tensile tester according to the present invention has, at one end, a hooking jig for hooking and holding the head of a test body planted on a sticking surface such as a wall or floor. A tension screw shaft provided with a screw portion on the other end side, a rotating member screwed into the screw portion, and a piston member rotatably supporting the rotating member and having the tensile screw shaft penetrated therethrough. A cylinder member for slidably fitting and holding the piston member, a reaction table for fixedly supporting the cylinder member with respect to the fixing surface, and a space between the cylinder member and the piston member. A transmission medium that intervenes to transmit the reaction force from the cylinder member to the piston member, and an indicator that operates based on the change of the transmission medium to display the tensile force applied to the tension screw shaft are provided. It has a feature.

The transmission medium is a liquid sealed in a hydraulic chamber that is liquid-tightly formed by a cylinder member and a piston member, and the indicator is a hydraulic pressure gauge that operates by the pressure generated in the transmission medium. Can be a structure that is

[0007]

[Action]

 Install this fixing force tensile tester so that the test piece is located almost in the center of the reaction force table, and rotate the rotating member to adjust the height of the hooking jig to move the device laterally. Hook and hold the hooking jig at the tip on the head of the specimen such as anchor bolts, nails and wood screws, and rotate the rotating member in the direction to pull up the tension screw shaft. Then, since the cylinder member is fixedly supported on the fixed surface via the reaction table, the above-mentioned matter is transmitted via the transmission medium (for example, liquid) interposed between the cylinder member and the piston member. A reaction force corresponding to the rotational force is applied to the piston member and the tension screw shaft is pulled up. As a result, the test body whose head is held by the hooking jig is pulled, the pulling force corresponding to the pulling force acts on the fixing surface, and the pulling force is transmitted from the piston member to the transmission medium, The tensile force is displayed on an indicator (for example, a hydraulic gauge) via the change in the form of the transmission medium.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a vertical sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.

First, the configuration will be described. Reference numeral 1 shown in FIG. 1 and the like is a tension screw shaft. This tension screw shaft 1 is made of one straight rod, and has a fixing screw portion 2 at one end and a feed screw portion 3 extending to the central portion in the axial direction at the other end side. There is. On the outer circumference of the tension screw shaft 1, there is provided a guide groove 4 extending in the axial direction from one screw portion 2 to the other screw portion 3.

A hooking jig 5 made of a small shaft-like piece is detachably screwed and fixed to the screw portion 2 for fixing the tension screw shaft 1. This hooking jig 5 hooks and holds the head of the test body S implanted on a fixing surface B such as a wall, a floor, or a ceiling. It is provided on the opposite side of. The holding portion 6 is composed of a through hole 6a penetrating the jig body in the radial direction and a slit 6b for opening the through hole 6a to the end face side, and the shaft portion of the test body S is penetrated through the slit 6b. The head is hooked and held in the through hole 6a. At the time of use, the hooking jig 5 is replaced with an appropriate size depending on the size of the test body S.

A ring-shaped rotating member 7 is screwed onto the screw portion 3 for feeding the tension screw shaft 1. Two or more handle pieces 8 projecting laterally are fixed to the rotating member 7 by screwing, and by applying a rotating force to the handle pieces 8, the rotating member 7 can be easily rotated. A knurled portion 8a is provided on the outer peripheral surface of the handle piece 8, and the knurled portion 8a prevents slippage. A thrust bearing 9 for smoothing the rotation of the rotary member 7 is arranged below the rotary member 7, and a tensile screw shaft 1 is provided at the center of the thrust bearing 9 below. A piston member 10 is provided that penetrates in the axial direction with a predetermined gap.

The piston member 10 includes a disc-shaped pressing portion 10a on which the thrust bearing 9 is placed, and a cylindrical shaft portion 10b protruding on the lower surface side of the pressing portion 10a. Reference numeral 11 denotes a cylinder member into which a piston member 10 is slidably fitted, and the cylinder member 11 has a cylindrical large diameter portion 11a and a small diameter portion 11b which are provided with their axes aligned. .. The pressing portion 10a of the piston member 10 is loosely fitted to the large diameter portion 11a of the cylinder member 11, and the cylinder shaft portion 10b is loosely fitted to the small diameter portion 11b. Has been formed. The hydraulic chamber 12 is filled with a liquid C which is a specific example of a transmission medium which is interposed between the piston member 10 and the cylinder member 11 and which transmits the reaction force from the cylinder member 11 to the piston member 10. The liquid-tightness of the hydraulic chamber 12 is ensured by the O-ring 13 mounted on the annular groove provided on the outer peripheral surface of the pressing portion 10a and the annular groove provided on the outer peripheral surface of the cylindrical shaft portion 10b. It is secured with the O-ring 14 attached.

An indicator 15 is attached to the large-diameter portion 11 a of the cylinder member 11 to convert the pressure in the hydraulic chamber 12 into a tensile force of the tension screw shaft 1 for display. As the display unit 15, various pressure gauges that convert and display the pressure to be measured into the displacement of an elastic body or a liquid column can be applied. For example, elasticity using a Bourdon tube or a diaphragm can be used. A fluid pressure gauge composed of a pressure gauge is used. This indicator 15 has a main needle 16 that changes in accordance with changes in the applied pressure, and a placement needle 17 that is interlocked with this main needle 16 and is left at the maximum pressure position. It is set to the zero position by rotating the knob 18. 19 is a blind screw that closes the oil inlet.

Further, a screw portion is provided on the outer periphery of the small diameter portion 11b of the cylinder member 11, and the sleeve member 20 is screwed and fixed to the screw portion. The sleeve member 20 serves as a bearing for fixing the cylinder member 11 to the reaction force base 21 and also for holding the tension screw shaft 1 slidably, and a guide plate 22 is attached to the lower surface thereof. Has been. As shown in FIG. 2 and the like, the guide plate 22 has a ring shape, and is provided with a guide protrusion 23 that protrudes inward in the radial direction and is engaged with the guide groove 4 of the tension screw shaft 1. The guide protrusion 23 is slidably engaged with the guide groove 4 so that the tension screw shaft 1 is prevented from rotating and is movable only in the vertical direction. Reference numeral 24 is a mounting screw for tightening and fixing the guide plate 22 to the lower surface of the sleeve member 20, and a slit is provided at the tip of the shaft portion, and the elastic force prevents the mounting screw 24 from loosening.

The reaction table 21 is a disk-shaped machine base 25 into which the small diameter portion 11b of the cylinder member 11 into which the sleeve member 20 is fitted, and a peripheral portion of the machine base 25 such as by welding. It is provided with three leg pieces 26 fixed by a connecting means, and the cylinder member 11 is fastened and fixed to this reaction force base 21 by a fixing screw 27 screwed to the side portion of the machine base 25. There is. A screw portion 28 is provided on the lower portion of each leg piece 26, and an adjusting piece 29 is screwed into the screw portion 28. The adjusting piece 29 adjusts the height of the leg pieces 26, and adjusts the heights of the three leg pieces 26 so that the machine base 25 is leveled. A knurl is formed on the outer peripheral surface of the adjusting piece 29 so that the height can be easily adjusted manually. In addition, 40 shown in FIG. 1 is a cap nut for makeup.

Next, the operation will be described. The sticking force tensile tester according to the present invention can be used for the following tests, for example. For anchoring strength test of anchors, plugs, nails, etc. in post-construction, anchoring strength test of anchor bolts and insert members in pre-attachment method, adhesion / peel strength test of tiles, mortar, bonding materials, paints, etc., to test other adhesive strength It can be applied to various tests of. Also, these tests can be performed at various locations such as walls, ceilings and floors. Before use, a hooking jig 5 having a size suitable for the test body S to be tested is set on one end of the tension screw shaft 1. Then, if necessary, the fixing screw 27 is loosened to adjust the slit of the hooking jig 5 to be easily set on the head of the test body S, and then the fixing screw 27 is tightened again to be fixed.

First, the fixing force tensile tester is installed on the fixing surface B so that the test body S is located substantially at the center of the reaction table 21, and an adjusting piece screwed to the lower part of the three leg pieces 26. Turn 29 to level the machine. Next, a force is applied to the handle piece 8 to rotate the rotating member 7, and the tension screw shaft 1 is moved up or down to move the machine laterally while adjusting the hooking jig 5 to the height of the head of the test body S. Then, the head of the test body S is hooked and held by the holding portion 6 of the hooking jig 5. Then, the needle setting knob 18 is turned to set the needle setting 17 to zero. Thereafter, the force applied to the handle piece 8 is gradually increased to rotate the rotating member 7 and pull up the tension screw shaft 1.

In this case, since the cylinder member 11 is fixedly supported on the fixed surface B via the reaction force base 21, when the rotating member 7 is rotated to apply a force to the piston member 10, the cylinder member 11 11 is applied to the piston member 10 from the cylinder member 11 via the liquid C, which is a transmission medium interposed between the piston member 10 and the piston member 10, from the cylinder member 11. The tension screw shaft 1 is pulled up according to the number of rotations. As a result, the test body S whose head is held by the hooking jig 5 is pulled upward, and a pulling force corresponding to the pulling force acts on the fixing surface B from the test body S. At the same time, a force equal to the tensile force generated in the tension screw shaft 1 is generated as the pressure of the liquid C in the hydraulic chamber 12, and the hydraulic pressure acts on the indicator 15. Therefore, the change in the pulling force appears on the display unit 15, and the main needle 16 and the placement needle 17 rise as the pulling force increases.

By continuing to increase the tensile force, the force applied due to the main needle 16 swinging to full scale is reduced, or the limit of the fixing force of the test body S is reached during the process, and When the test body S comes out, the force applied from the tension screw shaft 1 to the piston member 10 via the rotating member 7 is released, so that the main needle 16 starts descending, while the setting needle 17 is at the full scale position or Stopped at the limit position. Therefore, the sticking proof strength of the test body S can be measured by reading the numerical value at the position where the needle 17 stops. When removing the hooking jig 5 before the test body S comes out, the rotary member 7 is reversely rotated to reduce the pressure in the hydraulic chamber 12, and the main needle 16 is returned to zero and then removed. To

FIG. 3 shows another embodiment of the present invention. In this embodiment, the load cell 41 is used to detect the magnitude of the applied force. Therefore, instead of the liquid C in the above-mentioned embodiment, a transmission medium is formed by a solid material such as a synthetic resin, a rubber-like elastic body or a metal material, and a strain gauge is adhered to the solid material. Then, connect the digital display 42 to the strain gauge, extract the strain generated in the strain gauge due to the load applied to the solid material as a change in current due to the change in electric resistance, and convert it into a digital electric signal. Is displayed as a number directly. With such a configuration, the same effect as that of the above embodiment can be obtained.

[0021]

[Effect of the device]

 As described above, since the present invention is configured as described above, it has the following effects. In other words, since all functions are integrally configured in relation to the tension screw shaft, they are small and lightweight and are easy to carry, and can be used by one worker without the need for a work assistant. Therefore, it is possible to provide a sticking force tensile tester which is easy to operate and has excellent workability. In addition, it is possible to measure the sticking force of the test piece with high accuracy and to easily test different size test pieces by changing the size of the hooking jig. Machine can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a front view showing another embodiment of the present invention.

FIG. 4 is a front view showing a conventional adhesive strength tensile tester.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tension screw shaft 2, 3 Screw part 4 Guide groove 5 Hooking jig 6 Holding part 7 Rotating member 10 Piston member 11 Cylinder member 12 Hydraulic chamber 15, 42 Indicator 20 Sleeve member 21 Reaction force plate 22 Guide plate 29 Adjustment piece 41 Load cell B Fixed surface C Liquid (Transmission medium) S Specimen

Claims (2)

[Scope of utility model registration request] 1. A tension screw shaft having a hooking jig for hooking and holding the head of a test body, which is planted on a fixed surface such as a wall or floor, at one end and a screw portion at the other end, and A rotary member screwed into the threaded portion, a piston member rotatably supporting the rotary member and having the tension screw shaft pierced through, a cylinder member slidably fitted and holding the piston member, A reaction force base that fixedly supports the cylinder member with respect to the fixed surface; a transmission medium that is interposed between the cylinder member and the piston member and that transmits the reaction force from the cylinder member to the piston member; A sticking force tensile testing machine, comprising: an indicator that operates based on a change in a transmission medium to display a tensile force applied to the tension screw shaft. 2. The transmission medium is a liquid sealed in a hydraulic chamber that is formed in a liquid-tight manner by the cylinder member and the piston member, and the display device displays the pressure generated in the transmission medium. The sticking force tensile tester according to claim 1, which is a hydraulic gauge that operates.