JP6163389B2 - Pull-out tester and probe mounting tool in the pull-out tester - Google Patents

Description

  The present invention mainly relates to a pull-out tester for measuring the strength of members such as wood, wooden boards, earth walls, gypsum and mortar. More specifically, after a probe having a tip threaded portion is screwed into a member to be measured, a pull-out tester capable of examining the strength and deterioration degree of the member by measuring the pull-out resistance (load) of the probe and the pull-out The present invention relates to a probe mounting tool in a tester.

  Conventionally, the strength of a member is measured mainly by applying a force such as bending, compression, and shearing to a small specimen molded from the original material. When trying to diagnose the degree of deterioration or soundness of an existing structure, the conventional method requires taking out a small test piece from the members constituting the structure, resulting in damage to the structure.

  Therefore, a pull-out test for measuring the pull-out resistance of a wood screw probe is conventionally known as a means for examining the degree of deterioration inside wood or the like. For example, it is known that a screw screwed into wood is pulled out using hydraulic pressure by a hydraulic pump operated by a lever and the pulling force is measured (see Patent Document 1). Furthermore, a tester (see Patent Document 2) that displays a detected torque (pulling force) applied when a screw screwed into wood or the like is pulled out with a torque wrench is used.

  All of these conventional pull-out testers are complicated in equipment and have a heavy upper portion and are likely to fall over. It was difficult to use it sideways or upward, or to operate it with one hand. In particular, the above-mentioned conventional devices are portable, but for the purpose of measuring the distribution of pullout strength, these existing devices are used under a narrow floor in a wooden house or an unstable hut under a foot. Difficult to do.

  In addition, in the conventional tester, the wood screw probe and the pull-out tester were independent of each other. Therefore, after the wood screw probe was screwed into wood, the pull-out tester was attached, and then the pull-out resistance was reduced. It was necessary to measure.

  In addition, it is possible to repeatedly perform the screwing of the wood screw probe, the mounting of the pull-out tester, and the measurement of the pulling resistance multiple times (4 to 8 times) with respect to one measuring position (one hole). It is extremely complicated and inefficient, and the pull axis of the pull-out tester and the axis of the wood screw probe are slightly shifted for each measurement, which causes a decrease in the accuracy of the measurement results.

  In order to solve such a problem, the present inventors have a simple structure and can be used with a simple operation using tools such as an existing driver and an electric screwdriver. A portable pull-out tester has been proposed that can easily check the degree of deterioration of wood or the like that is unstable under the feet of the feet, etc., and does not reduce the measurement accuracy (see Patent Document 3).

  Moreover, about the portable pull-out tester which measures the pulling strength of a wood screw, the present inventors proposed the method of shortening the blade length of a wood screw, and are calling it a wood screw probe. Furthermore, the present inventors have proposed a method for measuring the distribution of the pulling strength within the cross section of the wood (see Non-Patent Documents 1 and 2).

  The present inventors have also proposed a method of using a metric screw instead of a wood screw, which is called a metric screw probe. A method for estimating the shear strength of a member from the pull-out strength of the probe has also been proposed. Furthermore, the present inventors have proposed a method capable of managing the screwing depth of the probe by marking the surface of the shaft portion from which the thread of the metric screw probe has been deleted (see Non-Patent Document 3).

Japanese Patent Laid-Open No. 10-267922 JP 2005-283295 A Japanese Patent No. 4927883

Hirofumi Sakuma, Shuyu Yamaguchi, Shiro Nakajima, 2007 Architectural Institute of Japan Conference, existing presentation manuscript, “Strength Safety Diagnosis of Wooden Parts of Existing Wooden Buildings (1), Pulling / Bending Experiment Using Wood Screw Probe” Yamaguchi, Shuyu, Sakuma, Hirofumi, Nakajima Shiro, 2007 Architectural Institute of Japan Conference, existing presentation manuscript, “Strength and health diagnosis of wooden parts of existing wooden buildings (2), pull-out strength of wood screw probe and wood density / bending strength Relationship " Yamaguchi, Shuyu, Nakajima, Shiro, Ken Fuda, 2012 Architectural Institute of Japan conference, existing presentation manuscript, “Deterioration diagnosis method for physical life evaluation of existing wooden buildings (1), Diagnosis using shear strength of wood Law "

  The portable pull-out tester described in Patent Document 3 invented by the present inventors is extremely convenient as a tester that is carried and can be easily pulled-out for the degree of deterioration of wood in an existing building.

  However, if the probe is tilted and screwed into the wood surface, for example, because a pre-formed hole for inserting the probe into the wood to be measured is inclined with respect to the wood surface, The following problems arise.

  That is, since the probe has a screw head for driving, a screw portion for driving, and a shaft portion of the probe which are integrally formed as a rigid body, the probe is subjected to a load in the bending direction, and the probe is a screw of a pulling long nut. The problem is that the screwing with the part does not become smooth and smooth drawing cannot be performed. Furthermore, there arises a problem that the load cell is loaded unevenly via the pulling long nut.

  In addition, it is preferable to appropriately replace and use a probe having a different thread shape, diameter, etc., depending on the material of the member to be measured and the purpose of the test. Further, it is preferable that the probe can be easily replaced when the probe is damaged. However, since the portable pull-out tester described in Patent Document 3 is already mounted on the pedestal of the portable pull-out tester, replacement of the probe is not always easy.

  By the way, in order to measure an object to be measured with a pull-out tester and obtain a pull-out strength distribution, the probe may be measured a plurality of times by changing the screwing depth. In such a case, the height at which the probe starts to be pulled out (drawing start height) varies depending on the screwing depth. There is a problem that it is troublesome to adjust the pull-out tester in accordance with such a pull-out starting height.

  Furthermore, when the probe is pulled out by the pull-out tester, an electric screwdriver is used. However, in order to set the pull-out speed to an appropriate speed, it is preferable that the pull-out test is performed via a deceleration device. In such a case, there is a problem that the deceleration device is difficult to work due to the rotational reaction force.

  The present invention aims to solve the above-mentioned conventional problems, even when the probe is slightly screwed into the measurement object, even when the pull-out tester pulls out the probe and performs a pull-out test, It is an object of the present invention to realize a pull-out tester having a simple configuration in which a load is not applied to the screw portion of the probe or the pull-out tester and the load cell can be uniformly loaded during pull-out.

  In the present invention, in order to solve the trouble of attaching the probe to the pull-out tester, which is a problem of the conventional tester of the type in which the probe is attached to the pull-out tester during the pull-out test, the probe is simply It is an object to realize a probe mounting tool that can be mounted on a pull-out tester.

  Another object of the present invention is to realize a pull-out tester capable of easily adjusting the pull-out start height of a probe and a probe mounting tool in the pull-out tester when measuring a plurality of times by changing the screwing depth of the probe. And

  Furthermore, according to the present invention, when the driving force of the electric driver is used for pulling out work or the like via the speed reducing mechanism, the rotating reaction force of the speed reducing mechanism is prevented and the main body frame is easily fixed. An object of the present invention is to realize a pull-out tester equipped with a possible deceleration device.

  In order to solve the above-mentioned problems, the present invention is a pull-out tester including a pull-out tester main body, a probe mounting tool, and a probe, and the pull-out tester main body includes a main body frame, a spindle screw, a driving nut, a universal joint. The body frame has a leg and a bridge, and the bridge is formed with an insertion hole through which the spindle screw is movably moved in the vertical direction. The driving long nut is rotatably provided at the position that coincides with the insertion hole on the bridge portion without moving in the vertical direction. The spindle screw is inserted into the insertion hole, and is screwed with the driving long nut. The drive long nut rotates so that it can move only in the vertical direction, and the lower end of the main shaft screw is attached with a hanging tool via a universal joint body. Attach and rotate the probe With screwing probe the measuring object in the to provide pull-out tester according to characterized in that for attaching the probe to the pull-test body by removably mounted lifting jig.

  The probe mounting tool includes a neck and a body, and the body has a rectangular shape in plan view, and has a probe mounting and fixing portion at a lower portion thereof, and is the largest part in plan view of the neck. Is smaller than the diameter of the inscribed circle of the body.

  The lifting tool has a slot at the lower end, and the slot opens on the lower surface and one side surface of the lifting tool. The opening shape of the side view is a groove on the neck head of the probe mounting tool from the side. The shape can be inserted into the hole.

  The driving long nut and the probe mounting tool are each configured to be rotated by an electric screwdriver or manually by fitting a tool.

  The universal joint body is configured to be slidably guided in the vertical direction on the legs of the main body frame on both sides thereof.

  The bridge portion of the main body frame is configured to be attached so that the attachment position with respect to the leg portion can be adjusted in the vertical direction.

  The bridge part of the main body frame has a rectangular convex part in plan view, and the bridge part is provided with a reduction gear fixing case, a reduction gear mechanism and a socket made of a rectangular cylinder. The reduction gear mechanism is provided in a reduction gear fixing case, and the reduction gear fixing case is provided on the bridging portion so as not to rotate by being fitted to a rectangular convex portion.

For the present invention to solve the above problems, fitted with a probe, by rotating, with screwing the probe to the measuring object, removably attached to the lifting jig provided in pull-test body of the drawing tester The probe mounting tool for mounting the probe on the pull-out tester main body, the probe mounting tool is provided with a neck and a body, and the body has a square shape in plan view, and a lower part thereof. The probe mounting fixture has a configuration in which the size of the maximum portion of the neck head in plan view is smaller than the diameter of the inscribed circle of the body portion.

  The side shape of the neck head of the probe mounting tool can be inserted from the side into the groove of the lifting tool formed so as to open on the lower and side surfaces of the lifting tool. It is a shape that is suspended by a holding tool.

  The pull-out tester main body to which the probe is mounted by the probe mounting tool includes a main body frame, a spindle screw, a driving long nut, a universal joint body, a load cell, and a suspension tool. The main body frame includes a leg portion, a bridge portion, and a bridge portion. The bridge portion is formed with an insertion hole through which the spindle screw is movably inserted in the vertical direction, and the drive nut is located in the vertical direction at a position that coincides with the insertion hole on the bridge portion. The main shaft screw is inserted through the insertion hole, screwed into the driving long nut, and the driving long nut rotates so that it can move only in the vertical direction. And the suspension tool is attached to the lower end of the main shaft screw via a universal joint body.

According to the pull-out tester and the probe mounting tool in the pull-out tester according to the present invention, the following effects are produced.
(1) Since the probe mounting tool that can be attached to and detached from the pull-out tester is provided, the probe can be easily attached to and detached from the pull-out tester without trouble. In particular, since the suspension device for suspending the probe attachment device is attached to the main shaft screw that can move up and down via the load cell and the universal joint body, the probe attachment device can be easily attached to and detached from the suspension device. Even if the probe is slightly inclined and screwed into the object to be measured, even when pulling out the probe with a pull-out tester and performing a pull-out test, the probe and pull-out tester are not loaded, preventing damage. Furthermore, it is possible to apply a uniform load to the load cell during drawing.

(2) Since the maximum diameter of the neck head of the probe mounting tool is smaller than the square inner diameter of the trunk, the socket wrench of the electric driver having a socket wrench having a square hole is placed above the probe mounting tool. Can be fitted to the body portion, and the screwing operation of the probe can be facilitated and the damage caused by repeated use can be reduced as compared with the configuration of screwing with the + hole or the −hole.

(3) If the bridging part of the frame of the pull-out tester main body can be moved up and down with respect to the leg part, the pull-out start position can be easily adjusted. When it is determined stepwise in advance in the test, the drawing start position can be easily adjusted according to the stepped depth, and the efficiency of the measurement work can be improved.

(4) The reduction gear mechanism can be attached to the bridge part of the body frame of the pull-out tester so that it does not rotate even if it receives the rotational reaction force from the reduction gear fixed case of the reduction gear. Thus, the probe can be pulled out reliably at a desired rotational speed (for example, a predetermined low speed) and at a constant speed, so that the measurement accuracy can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining Example 1 of the pull-out test device based on this invention, (a) is a figure which shows the whole structure of a pull-out test device, (b) is a probe mounting tool which mounted | wore the probe to a hanging tool. It is a figure which shows the state applied. (A) is a top view, a front view, and a bottom view illustrating the configuration of the probe mounting tool of the embodiment of the present invention, (b) is a diagram illustrating the probe, and (c) is a depth management cylinder. It is a figure which shows a member, (d) is a figure which shows the state which mounted | wore the probe mounting tool with the probe. (A), (b) is the front sectional drawing and side sectional drawing which show the concrete structure of a hanging tool, (c) is a figure which shows the modification of a lobe, (d) These are figures explaining the state which shear resistance arises when extracting a probe. It is a figure explaining the effect | action of the said Example, (a) is a figure which shows the state which screws in a probe, (b) is a figure explaining the state which pulls out a probe. It is a figure explaining the whole structure of Example 2 of the drawing tester concerning the present invention. (A) is AA top view of FIG. 4, (b) is BB sectional drawing of FIG. (A), (b) is a figure explaining the effect | action of Example 2 of the pull-out tester based on this invention. It is a figure which shows the whole structure of Example 3 of the pull-out tester based on this invention. It is a figure which shows sectional drawing of each part of the said Example 3, (a) is AA sectional drawing of FIG. 8, (b) is BB sectional drawing of FIG. 8, (c) is a figure. It is CC sectional drawing of 8. FIG.

  An embodiment for carrying out a pull-out tester according to the present invention and a probe mounting tool in the pull-out tester will be described below with reference to the drawings based on the examples.

  In the pull-out tester according to the present invention, the member that is the object to be measured is a member such as wood, wooden boards, earth wall, gypsum, mortar, or plastic. These members may be in a state where they are already used as a part of an existing structure or in a material state to be used in the future.

Example 1
A first embodiment of a pull-out tester according to the present invention and a probe mounting tool in the pull-out tester will be described with reference to FIGS. A pull-out tester 1 according to the present invention includes a pull-out tester main body 2, a probe mounting tool 3, and a probe 4.

Pull-out tester body:
As shown in FIG. 1, the pull-out tester main body 2 according to the present invention includes a main body frame 7, a base 8, a main spindle screw 9 that only moves up and down, a driving long nut 10, a universal joint body 11, and a load cell. 12 and a hanging tool 13.

  The main body frame 7 is formed in a substantially gate shape as a whole, and includes a pair of leg portions 17 extending in the vertical direction and a bridging portion 18 having a flat upper surface. A horizontal fixing portion 19 is formed at the lower end of the leg portion 17 and is fixed to the base 8 with screws. The bridging portion 18 is formed with an insertion hole 23 at the center thereof that penetrates in the vertical direction and penetrates the main shaft screw 9 so as to be movable in the axial direction.

  The pedestal 8 has a flat bottom surface so as to come into contact with a member (measurement target member 24, see FIG. 4) as a measurement target, and has an opening 25 in the center.

  A screw portion 26 is formed on the outer surface of the main shaft screw 9. The main shaft screw 9 is screwed into a driving long nut 10, which will be described later, and passes through the insertion hole 23 of the bridging portion 18 of the main body frame 7. It is provided to be movable.

  A load cell 12 is attached to the lower end of the main shaft screw 9 via a universal joint body 11. In this embodiment, the universal joint body 11 includes a U-shaped member 31 that is screwed onto a screw at a lower end portion of the main shaft screw 9 and fastened by a nut 30, and a horizontal pin 32 that is attached to the U-shaped member 31. The load cell mounting member 37 is provided on the horizontal pin 32 via the universal joint 33.

  Various configurations of the universal joint 33 can be considered. In the first embodiment, the ball portion 38 formed on the horizontal pin 32 is rotated in all directions within the socket portion 39 formed on the upper portion of the load cell mounting member 37. It was configured to hold it as possible. As a result, the load cell 12, the lifting tool 13, the probe 4 mounting tool 3, and the probe 4 can be tilted in all directions with respect to the spindle screw 9.

  The left and right end portions 41 of the horizontal pin 32 are fitted in guide grooves 42 formed on the inner side surfaces of the left and right leg portions 17 of the main body frame 7 in the vertical direction, are slidable, and rotate in a horizontal plane. Is restrained. With this configuration, the main shaft screw 9 is constrained so as not to rotate about its axis.

  The drive nut 10 is screwed to the thread portion 26 of the main shaft screw 9 and is rotatably provided on the bridging portion 18 of the main body frame 7 via the thrust bearing 43 and the like without moving in the vertical direction. ing.

  The outer shape of the driving nut 10 is formed in a hexagonal shape in plan view, and is provided by an electric screwdriver 47 (see FIG. 4B, etc.) equipped with a socket wrench 46 having a hexagonal hole, or a socket wrench having a hexagonal hole. It can be rotated manually using a tool (not shown). When the driving long nut 10 rotates, the main shaft screw 9 moves in the vertical direction.

  When a socket wrench is attached to the electric driver 47 via a speed reducing device, it is possible to improve the measurement accuracy by performing an accurate extraction operation that is stable at a constant speed and at a low speed. A configuration in which such a deceleration device is provided in the bridge portion 18 of the frame of the pull-out tester main body 2 will be described in the third embodiment. A configuration including such a deceleration device is described in the first embodiment. It is also applicable to.

  A load cell 12 having a known configuration is used. When a force that pulls the load cell 12 in the vertical direction is applied, the force is detected and an output that responds to the force is sent to an amplifier indicator 48 connected to the load cell 12. A hanging tool 13 is attached to the lower part of the load cell 12.

  The lifting tool 13 is formed of a cylindrical body, and its upper part is attached to the lower part of the load cell 12 via a mounting screw 51 as shown in FIG. A groove hole 52 that penetrates one side surface in the radial direction and opens to the lower surface is formed in the lower portion of the hanging tool 13. In addition, the structure (not shown) which penetrates both the side surfaces may be sufficient as the slot 52 not only one side surface of radial direction.

  The cross-sectional shape perpendicular to the penetrating direction of the slot 52 (the shape in a side view) is such that a neck head 57 of the probe mounting tool 3 described later can be fitted from the side, and the neck head 57 is downward. It is a shape that can be suspended so as not to fall off.

  In particular, as shown in FIG. 1B, when a portion of the groove hole 52 that opens to the lower surface is formed with a tapered surface 53 that narrows the groove hole 52 downward, the tapered surface 53 has the probe mounting tool 3 attached to the tapered surface 53. The neck head 57 comes into contact with and is supported, and the probe mounting tool 3 is stably suspended.

  A screw hole 54 for screwing the attachment screw 51 is formed on the upper part of the lifting tool 13, and as shown in FIGS. 3A and 3B, the screw hole 54 is a groove hole 52 in the vertical direction. It is preferable that it is formed so as to penetrate through. With such a configuration, as shown in FIG. 3B, a drill 59 for machining the tapered surface 53 can be inserted from the screw hole 54, which is convenient in manufacturing.

Probe mounting tool:
In the pull-out tester 1 of the present invention, for example, as shown in FIG. 4A, a probe hole 55 in which the probe 4 is previously drilled in the measurement target member 24 using an electric screwdriver 47 equipped with a socket wrench 46 is used. Then, the probe 4 is pulled out by the pull-out tester main body 2 and the pull-out resistance force is measured by the load cell 12. As a means for attaching the probe 4 to the pull-out tester main body 2 when performing such measurement. A probe mounting tool 3 is used.

  As shown in FIG. 2A, the probe mounting tool 3 is integrally formed from a body 56 and a neck portion 57 in a prismatic shape for mounting a probe (in this embodiment, a hexagonal columnar shape in plan view). . A probe mounting hole 58 for screwing the upper end of the probe 4 is formed at the center of the lower surface of the body portion 56. The neck head 57 is formed upward from the center of the trunk portion 56.

  In the present embodiment, the neck head portion 57 is formed with a nail head-like portion, and can be fitted from the side into the groove 52 of the lifting device 13 as described above. When fitted in the groove hole 52, it does not fall from the groove hole 52 of the lifting tool 13. Therefore, the probe mounting tool 3 is suspended in a state of being suspended by the suspension tool 13.

  The diameter d1 at the upper end surface of the neck head portion 57 (which is the dimension of the maximum portion in plan view of the neck head portion 57) is smaller than the diameter d2 of the hexagonal inscribed circle of the body portion 56 (FIG. 2). (See the plan view of (a)). Accordingly, the socket wrench 46 having a hexagonal hole attached to the electric driver 47 can be fitted to the body portion 56 from above the probe attachment tool 3 without being caught by the neck head portion 57.

probe:
As shown in FIG. 2 (b), the probe 4 is formed in a long and thin bowl shape as a whole, and a mounting screw that is screwed into the probe mounting hole 58 of the probe mounting tool 3 at the base end thereof. A portion 61 is formed. At the tip of the probe 4, a tip screw portion 62 that is screwed into a tip hole 55 (see FIG. 4 or the like) previously drilled in the measurement target member 24 is formed.

  A cylindrical member 63 for depth management (see FIG. 2C) for managing the screwing depth is fitted to the probe 4, and the set screw 64 is attached to the probe 4 as shown in FIG. 2D. It is fixed. As shown in FIG. 4A, the depth management cylindrical member 63 is stopped at the periphery of the front hole 55 when the probe 4 is screwed into the front hole 55. The depth at which the probe 4 is screwed into the leading hole 55 is controlled, and the probe 4 is accurately screwed to a predetermined depth.

  If the probe 4 is prepared with several types of probes 4 (for example, wood screws, millimeter screws, etc.) having different materials, shapes of the tip screw portions 62, screw pitches, etc., the material of the measurement target member 24, etc. Correspondingly, it is possible to replace the probe mounting tool 3 as appropriate and use it. FIG. 2B shows an example in which the tip screw portion 62 is a wood screw.

  When the tip thread portion is a metric screw, the configuration shown in FIG. 2B may be used, but the probe may be configured as a modified example shown in FIG. That is, in the probe 65 of this modified example, the screw thread of the middle part (parts other than both ends) of the long screw is deleted, and the screw part remaining on the upper end side functions as the screw part 66 for mounting the probe. The screw portion left on the side functions as the tip screw portion 67 of the probe. In this probe 65, the mounting screw portion 66 of the probe and the tip screw portion 67 of the probe are formed with the same screw size (crest diameter, trough diameter, pitch).

(Function)
The operation of the pull-out tester 1 and the probe mounting tool 3 in the pull-out tester 1 having the above-described configuration will be described through the measurement process. In the measurement, the pull-out tester main body 2 is set in the state shown in FIG. On the other hand, a cylindrical member 63 for depth management is attached to the probe 4, and as shown in FIG. 2 (d), the mounting screw portion 61 is screwed into the probe mounting hole 58, and the probe 4 is attached to the probe mounting tool. Attach to 3.

  Then, using an electric screwdriver 47 equipped with a socket wrench 46 having a hexagonal hole, the socket wrench 46 is fitted to the body 56 of the probe mounting tool 3 as shown in FIG. The probe 4 is rotated together with the tool 3, and the tip screw portion 62 is screwed into a tip hole 55 previously drilled in the measurement target member 24.

The screwing depth is managed so that the lower surface of the depth managing cylindrical member 63 comes into contact with the surface around the tip hole 55 so as to have a predetermined depth. Although not shown, this screwing may be performed by manually rotating the probe 4 together with the probe mounting tool 3 using a socket wrench tool having a hexagonal hole.

  A base 8 of the pull-out tester is brought into contact with the surface of the measurement target member 24 into which the probe 4 is screwed, and the main shaft screw 9 is appropriately projected and retracted with respect to the main body frame 7. As shown in FIG. The neck head 57 of the tool 3 is inserted and fitted into the groove 52 of the lifting tool 13 from the side.

  In this case, the load cell 12 and the hanging tool 13 are appropriately changed in angle around the universal joint 33, so that the neck head portion 57 of the probe mounting tool 3 is inserted into the slot 52 of the hanging tool 13 from the side. Easy to do.

  As described above, the slot 52 of the hanging tool 13 is formed slightly larger than the neck head 57 of the probe mounting tool 3, but the neck head 57 of the probe mounting tool 3 is formed in the slot 52 of the lifting tool 13. When the long nut 10 for driving is rotated along the nail-head-shaped tapered surface, the neck head 57 is relatively slotted by lifting the lifting tool 13 upward. 52. As a result, as shown in FIG. 4B, the hanging tool 13 holds the probe head 3 while holding the neck head 57.

  In this state, the driving long nut 10 is rotated using an electric driver 47 provided with a socket wrench 46 having a hexagonal hole. Then, the spindle screw 9 can be moved upward, which is the direction in which the spindle screw 9 is pulled out from the main body frame 7. Accordingly, the probe 4 is pulled out from the measurement target member 24 via the universal joint body 11, the load cell 12, the lifting tool 13, and the probe mounting tool 3.

  At this time, when the probe 4 and the probe tip screw portion 62 are recessed into the hole side surface of the tip hole 55 and the probe tip screw portion 62 is pulled out, the measurement target member 24 in which the probe tip screw is recessed into the portion 62. The triangular base 68 of (wood, etc.) shears and breaks into a cylindrical shape. This cylindrical sheared surface is shown as a shear fracture surface 69 by a dotted line in FIG.

  When shear fracture occurs in the cylindrical shape, a shear resistance force of the measurement target member 24 is generated, and a corresponding force acts on the load cell 12 as a load. The load cell 12 measures this load and outputs the measurement signal to the amplifier indicator 48.

  By the way, the shear resistance generated by the shearing of the probe 4 and the tip hole 55 varies depending on the strength, material, and the like of the measurement target member 24. For example, the measurement target member 24 that is deteriorated, fragile, and reduced in strength has a small shear resistance and a load measured by the load cell 12 is small. On the other hand, for the measurement target member 24 that has not deteriorated and has a reduced strength, the shear resistance is large, and the load measured by the load cell 12 is large.

  Therefore, if the load measured by the load cell 12 is measured, the shear strength and the degree of deterioration of the measurement target member 24 can be measured. Although the measurement process by the probe mounting tool 3 in the pull-out tester 1 and the pull-out tester 1 is as described above, the following effects are produced.

  In the pull-out tester 1 of the present invention, the main shaft screw 9 is connected to the probe mounting tool 3 and the probe 4 via the universal joint body 11, so that the probe is slightly inclined with respect to the measurement target member 24. Even when the screw 4 is screwed, in the structure formed integrally from the spindle screw 9 to the probe 4, partial loading on the spindle screw 9, the body frame 7, the load cell 12, etc. that is generated at the time of pulling is applied, pressed, bent, etc. Can be reduced.

  As a result, the pull-out tester 1 is prevented from being damaged, and a load is not applied to the load cell 12 in a non-uniform state, so that an accurate pull-out test can be performed.

  Further, the probe mounting tool 3 has a nail head-shaped neck head portion 57 at the upper side, and can be easily attached to and detached from the suspension tool 13 of the pull-out tester main body 2, and the probe 4 is mounted on the lower surface. Since a probe mounting hole 58 for screwing is formed, different types of probes 4 are appropriately and selectively attached to the pull-out tester main body 2 via a mounting tool depending on the measurement target member 24. Can do.

  Since the maximum diameter of the neck head portion 57 of the probe mounting tool 3 is smaller than the hexagonal inner diameter of the body portion 56, the socket wrench 46 of the electric driver 47 is brought into contact with the neck head portion 57 to obstruct it. Without being done, it becomes possible to fit the body 56 from above the probe mounting tool 3.

(Example 2)
Example 2 of the pull-out tester according to the present invention and the probe mounting tool in the pull-out tester will be described with reference to FIGS. Similar to the pulling tester 1 of the first embodiment, the pulling tester 71 of the second embodiment includes a pulling tester main body 72, a probe mounting tool, and a probe. Since the probe mounting tool 3 and the probe 4 of the second embodiment are the same as the probe mounting tool 3 and the probe 4 of the first embodiment, the following description will be made focusing on the pull-out tester body.

  The pull-out tester main body 72 of the second embodiment has the same basic configuration and operation as the pull-out tester main body 2 of the first embodiment, but the pull-out height is mainly set in the main body frame 73. The difference is that the height of the bridge portion can be adjusted so that it can be adjusted. Hereinafter, the pull-out tester main body 72 of the second embodiment will be described focusing on the configuration different from the pull-out tester main body 2 of the first embodiment, and the same reference numerals will be given to the same configurations.

  The pull-out tester main body 72 of the second embodiment includes a main body frame 73, a spindle screw 9 that moves only in the vertical direction, a driving nut 10, a universal joint body 11, a load cell 12, and a lifting tool 13. It has.

  The main body frame 73 is formed in a substantially gate shape as a whole, and includes a pair of leg portions 76 and a bridge portion 76. At the lower end portion of the leg portion 76, there is a fixing portion 78 formed with a screw, and at the upper portion, an upper screw portion 79 for attaching the bridging portion 77 so that the vertical position can be adjusted is formed.

  The pedestal 8 is formed with screw holes 104 for fixing the leg portions on the left and right sides, and an opening 25 is formed in the center. The leg portion 76 is fixed by standing on the pedestal 8 with a fixing portion 78 screwed into the screw hole 104 of the pedestal 8.

  The bridging portion 77 is formed with an insertion hole 105 that penetrates the central portion of the bridge portion 77 in the vertical direction and passes through the main shaft screw 9 so as to be movable in the axial direction. Is formed.

  As shown in FIGS. 5 and 6A, the bridging portion 77 is formed with a rectangular convex portion 107 in a plan view having a flat upper surface at the center thereof, which will be described later. A groove that fits into the reduction gear fixing case 123 (see FIGS. 8 and 9B) in Example 3 to prevent the deviation, and that fits into the reduction gear fixing case 123 instead of the convex portion 107. Alternatively, depending on the tool that rotates the drive nut 10, the bridging portion 77 may be entirely flat without providing the convex portion 107.

  As shown in FIG. 5 and FIG. 6B, the reinforcing plate 111 is inserted horizontally into the upper threaded portion 79 of the leg portion 76, and is fastened with a height adjusting fixing nut 112 from above and below. Yes. The bridging portion 77 passes through the leg portion 76 through the through hole 106, and is placed on the height adjusting fixing nut 112 via the height adjusting spacer 113.

  The height adjusting spacer 113 has a U shape in plan view, and the thickness thereof will be described later. However, a plurality of the same thickness may be used, or different thicknesses may be used. Or both may be selected as appropriate.

  An appropriate number of height adjusting spacers 113 are attached to the leg 76 between the bridging portion 77 and the height adjusting fixing nut 112 from the side, and the bridging portion fixing nut 116 (from the upper side of the bridging portion 77). 5 and FIG. 6 (a)) is screwed to the upper threaded portion 79 and the bridging portion 77 is fastened from above and below, so that the bridging portion 77 is adjusted in height and fixed to the leg portion 76. It is possible.

  As in the first embodiment, the main shaft screw 9 has a screw portion 26 screwed into the driving long nut 10, passes through the insertion hole 105 of the bridging portion 77 of the main body frame 73, and moves up and down with respect to the bridging portion 77. It is provided to be movable in the direction.

  A load cell 12 is attached to the lower end of the main shaft screw 9 via a universal joint body 11. The universal joint body 11 is attached to the U-shaped member 31 and the U-shaped member 31 which are screwed onto the screw at the lower end portion of the main spindle screw 9 and fastened by the nut 30 and fixed, as in the first embodiment. It comprises a horizontal pin 32 and a load cell mounting member 37 provided on the horizontal pin 32 via a universal joint 33.

  The configuration of the universal joint 33 is the same as that of the first embodiment, and the load cell 12, the lifting tool 13, the probe mounting tool 3, and the probe 4 can be tilted in all directions with respect to the spindle screw 9.

  The left and right end portions of the horizontal pin 32 are guided by the left and right leg portions 76 of the main body frame 73 and can be moved in the vertical direction in the same manner as in the first embodiment, but specifically, different from the first embodiment. The configuration is adopted.

  That is, pipes 117 are fixed to the left and right ends of the horizontal pin 32, and the left and right pipes 117 are fitted to the left and right legs 76 so as to be guided by the left and right legs 76, respectively. Has been. With this configuration, the main shaft screw 9 is constrained so as not to rotate about its axis.

  As in the first embodiment, the spindle screw 9 can be moved in the vertical direction by rotating the drive nut 10. Incidentally, the driving long nut 10 may be manually performed using a socket wrench tool having a hexagonal hole, as in the case of the first embodiment.

  However, in the pull-out tester main body 72 of the second embodiment, since the bridging portion 77 can be moved and adjusted with respect to the leg portion 76, the leg portion 76 protruding upward from the bridging portion 77 is used as a socket wrench tool. It is difficult to work due to contact.

  Therefore, as shown in FIG. 7A, the pull-out measurement of the probe 4 can be easily performed by using the electric driver 47 with the socket wrench 46 attached thereto. The configuration in which the speed reducing mechanism for reducing the drive speed of the electric driver 47 is provided in the bridging portion 77 will be described in a third embodiment.

  The load cell 12 and the hanging tool 13 attached to the lower part of the load cell 12 have the same configuration as that of the first embodiment. When a force pulling up and down is applied to the load cell 12, the force is detected and an output in response to the force is sent to the amplifier indicator 48. As in the first embodiment, the hanging tool 13 is formed with a slot 52 into which the neck head 57 of the probe mounting tool 13 can be fitted, and the probe mounting tool 13 to which the probe 4 is mounted is suspended. Can do.

(Function)
The operation of the second embodiment having the above configuration will be described below. In addition, about Example 2, since the probe mounting tool 3 in the pull-out tester 71 has the completely same structure as Example 1, it demonstrates centering around the effect | action of the pull-out tester 71 of Example 2.

  The point that the probe 4 is mounted on the probe mounting tool 3 and screwed into the measurement target member 24 is the same as in the first embodiment. FIG. 7A is a diagram showing a state in which the probe 4 screwed into the tip hole 55 of the measurement target member 24 is pulled out by the pull-out tester 71.

  FIG. 7A shows a first pull-out test of the measurement target member 24 and shows a state in which the probe 4 is screwed into the tip hole 55 shallowly at a depth h1. FIG. 7B shows a second pull-out test of the member 24 to be measured, and the probe 4 is screwed deeper into the same tip hole 55 as the first measurement at a depth h2 than in the first measurement. Indicates the state.

  Thus, when the depth to which the probe 4 is screwed is different, the spindle screw 9 is appropriately moved with respect to the main body frame 73, and the lifting tool 13 is adjusted to the height with respect to the base 8 to start drawing ( It is necessary to adjust to the drawing start position. And in the position which starts this extraction, the neck head part 57 of the probe mounting tool 3 is inserted into the groove hole 52 of the hanging tool 13 from the side, and extraction is started.

  In order to move the main shaft screw 9 with respect to the main body frame 73 and adjust the lifting tool 13 to the drawing start position, the driving nut 10 is rotated forward or reverse as appropriate to move the main shaft screw 9 to the main body frame. It is necessary to move up and down with respect to 73, and the adjustment is troublesome.

  Therefore, in the second embodiment, a plurality of height adjusting spacers 113 are prepared in advance, and the number of the mounted height adjusting spacers 113 is adjusted so that the height adjusting spacer 113 is connected to the bridging portion 77 and the height adjusting fixing nut. By attaching to the leg part 17 from the side between 112, the height of the bridge part 77 with respect to the base 8 and the height of the holding tool 13 can be changed, and the drawing start position can be easily adjusted.

  In particular, if the screwing depth of the probe 4 is determined in advance for each test such as the first test and the second test as shown in FIGS. A plurality of height adjusting spacers 113 are prepared in advance corresponding to the depth that changes stepwise, and the number of the height adjusting spacers 113 is appropriately adjusted to fix the bridge portion 77 and the height adjusting spacer. By attaching between the nuts 112, the drawing start position can be easily adjusted, and the efficiency of measurement work can be improved.

  By the way, in FIG. 7A, two depth adjustment spacers 113 are mounted between the bridge portion 77 and the height adjustment fixing nut 112 so that the screwing depth of the probe 4 in the first test is obtained. The state where the extraction start position of the lifting tool 13 is adjusted corresponding to h1 and the height position of the neck head 57 of the probe mounting tool 3 is shown.

  In addition, as shown in FIG. 7B, when the screwing depth h2 of the probe 4 is deeper than that in FIG. 7A, although not shown, for example, the height adjusting spacer 113 is integrated into one sheet. By reducing the height, the height of the bridging portion 77 is lowered to correspond to the screwing depth h2 of the probe 4 and the height position of the neck head 57 of the probe mounting tool 3 in the second test. The drawing start position can be adjusted.

  In addition, after adjusting the number of mounted height adjustment spacers 113 to roughly adjust the drawing start position, further rotate the driving long nut 10 with a tool or the like to move the spindle screw 9 up and down. The height of the hanging tool 13 may be finely adjusted.

  Further, the plurality of height adjusting spacers 113 may have the same thickness, and the height between the bridging portion 77 and the height adjusting fixing nut 112 may be adjusted only by the number of the thicknesses. The height between the bridging portion 77 and the height adjusting fixing nut 112 may be adjusted by appropriately selecting from different thickness groups.

(Example 3)
Embodiment 3 of the pull-out tester according to the present invention and the probe mounting tool 3 in the pull-out tester will be described with reference to FIGS. The pull-out tester 121 according to the third embodiment includes the pull-out tester main body 72, the probe mounting tool 3, and the probe 4 that have the same configuration as the pull-out tester 71 according to the second embodiment, and the configuration and operation are substantially the same. . Accordingly, the same reference numerals are used for parts having the same configuration, and a characteristic configuration different from the second embodiment will be described here.

  A characteristic configuration of the pull-out tester 121 according to the third embodiment is that, in the pull-out tester main body 72 of the pull-out tester 71 according to the second embodiment, as shown in FIG. 10 is characterized in that a deceleration device 122 is provided so as to cover 10. The speed reduction device 122 includes a speed reduction gear fixing case 123, a speed reduction gear mechanism 124, and a socket 125.

  As shown in FIGS. 8 and 9B, the reduction gear fixing case 123 is formed in a rectangular cylinder, and is fitted on the convex portion 107 on the upper surface of the bridging portion 77 from the outside so as to be on the bridging portion 77. Is provided. A reduction gear mechanism 124 is provided above the reduction gear fixing case 123.

  The reduction gear mechanism 124 has a reduction gear (not shown), an input shaft 129 and an output shaft 130, receives a rotational force from the electric driver 47 via the input shaft 129, reduces the rotational speed, and outputs at the output shaft 130. The socket 125 is rotated. The long nut 10 for driving is rotated by rotation of the socket 125 so that the spindle screw 9 can be moved in the vertical direction.

  By the way, in the pull-out test, it is necessary to perform the pull-out test at a constant pull-out speed at a constant speed in order to perform accurate measurement. Therefore, the rotational speed of the drive nut 10 is constant at an appropriate rotational speed according to the material and type of the measurement target member 24, the screwing depth of the probe 4, the shape of the tip threaded portion 62 of the probe 4, and the like. Should be set to be Ideally, it is preferable to use an electric driver dedicated to a pull-out tester that can easily adjust the rotation speed and rotate at a constant speed and a low speed.

  However, since a dedicated electric driver increases the cost, it is preferable to use a commercially available electric driver via a speed reduction device. However, when a speed reduction device is provided in the pull-out tester, if the speed reduction gear mechanism is driven by an electric driver, a rotational reaction force that causes the frame of the speed reduction gear mechanism to rotate as a whole is generated.

  In the third embodiment, as described above, the reduction gear 122 is attached to the reduction gear fixing case 123 having a rectangular cylinder, and the reduction gear fixing case 123 is rectangular in the plan view of the bridging portion 77. The speed reduction gear fixing case 123 to which the speed reduction gear mechanism 124 is attached rotates as a whole by being stopped by receiving the rotational reaction force. This can be prevented.

  For this reason, according to the pull-out tester 121 of the third embodiment, the probe 4 is stably pulled out at a desired rotational speed (for example, a predetermined low speed) and at a constant speed by the electric driver 47 via the deceleration device 122. Since measurement can be performed, measurement accuracy can be improved.

  As mentioned above, although the embodiment for implementing the pull-out tester according to the present invention and the probe mounting tool in the pull-out tester has been described based on the examples, the present invention is not limited to such examples. It goes without saying that there are various embodiments within the scope of the technical matters described in the claims.

  Since the pull-out tester according to the present invention and the probe mounting tool in the pull-out tester are configured as described above, wood, resin, and the like used as materials for each part of buildings, plants, and other various devices, It can also be used for checking the degree of deterioration of other members. It can be used as a portable pull-out tester that can be carried to the site of a building, plant, apparatus, or the like to be measured.

  In particular, the pull-out tester according to the present invention has a simple structure and can be used with a simple operation using an existing tool such as an electric screwdriver or a socket wrench tool. It is most suitable as a portable pull-out tester that can easily check the degree of deterioration of wood or the like inside an unstable hut or the like, and without reducing the measurement accuracy.

DESCRIPTION OF SYMBOLS 1 Pull-out tester 2 Pull-out tester main body 3 Probe mounting tool 4 Probe 7 Main body frame 8 Base 9 Spindle screw 10 Long nut for driving 11 Universal joint body
12 Load cell
13 Suspension
17 Legs of body frame
18 Bridge of main frame
19 Fixed part at the bottom of the leg
23 Insertion hole in the bridge
24 Measuring object
25 Opening of pedestal
26 Thread part of spindle screw
30 Nut for fixing U-shaped member
31 U-shaped member of universal joint body
32 U-shaped horizontal pin
33 Universal joint
37 Load cell mounting members
38 Ball
39 Socket part
41 Both ends of horizontal pin
42 Leg guide groove
43 Thrust bearing
46 Socket Wrench
47 Electric screwdriver
48 Amplifier indicator
51 Mounting screw for lifting device
52 Groove hole of lifting tool
53 Tapered surface
54 Screw holes
55 Pre-holes pre-formed in the measurement target member
56 Body of probe mounting tool
57 Neck of probe fitting
58 Probe mounting hole of probe mounting tool 59 Drill
61 Probe mounting screw
62 Probe tip thread
63 Cylindrical member for depth management
64 Depth management cylindrical set screw 65 Probe 66 Probe mounting screw portion 67 Probe tip screw portion 68 Triangular base around the tip of the measurement target member (wood, etc.) 69 Measurement target member (wood, etc.) ) Shear fracture surface around the tip hole of 71
72 Pullout tester body
73 Body frame
76 Legs of body frame
77 Bridge part of main body frame
78 Fixed part at the lower end of the leg
79 Upper screw part of leg
104 Screw holes for fixing the pedestal legs
105 Insertion hole in the bridge
106 Through-hole in bridge
107 Convex part on the upper surface of the bridge
111 Reinforcing plate
112 Height adjustment fixing nut
113 Spacer for height adjustment
116 Nut for fixing the bridge
117 Pipe at end of horizontal pin
121 Pull-out tester
122 Deceleration device
123 Reduction gear fixed case
124 Reduction gear mechanism
125 socket
129 Input shaft of reduction gear mechanism
130 Output shaft of reduction gear mechanism

Claims (10)

A pull-out tester comprising a pull-out tester body, a probe mounting tool and a probe,
The pull-out tester body includes a main body frame, a spindle screw, a drive nut, a universal joint body, a load cell, and a lifting tool.
The main body frame has a leg portion and a bridging portion, and the bridging portion is formed with an insertion hole through which the spindle screw is movably inserted in the vertical direction.
The driving long nut is provided on the bridge portion so as to be rotatable without moving in the vertical direction at a position corresponding to the insertion hole.
The main shaft screw is inserted through the insertion hole, is screwed into the driving long nut, and is rotated so that the driving long nut rotates, and a universal joint body is provided at the lower end of the main shaft screw. A hanging tool is attached via
The probe mounting tool is a pulling tool characterized in that the probe is screwed into the object to be measured by attaching and rotating the probe, and the probe is mounted on the pulling tester main body by being detachably attached to the lifting tool. Tester.   The probe mounting tool includes a neck and a body, and the body has a rectangular shape in plan view, and has a probe mounting and fixing portion at a lower portion thereof, and is the largest part in plan view of the neck. The pull-out tester according to claim 1, wherein the dimension of is smaller than the diameter of the inscribed circle of the body part.   The lifting tool has a slot at the lower end, and the slot opens on the lower surface and one side surface of the lifting tool. The opening shape of the side view is a groove on the neck head of the probe mounting tool from the side. The pull-out tester according to claim 2, which has a shape that can be inserted into the hole.   The pull-out tester according to any one of claims 1 to 3, wherein each of the driving long nut and the probe mounting tool is configured to be rotated by an electric screwdriver or manually by fitting a tool.   The pull-out tester according to any one of claims 1 to 4, wherein the universal joint body is configured so as to be slidable in the vertical direction on the legs of the main body frame on both sides thereof.   The pull-out tester according to any one of claims 1 to 5, wherein the bridging portion of the main body frame is configured to be attached so that the attachment position with respect to the leg portion can be adjusted in the vertical direction.   The bridge part of the main body frame has a rectangular convex part in plan view, and the bridge part is provided with a reduction gear fixing case, a reduction gear mechanism and a socket made of a rectangular cylinder. The reduction gear mechanism is provided in a reduction gear fixing case, and the reduction gear fixing case is provided on a bridging portion so as not to rotate by being fitted to a rectangular convex portion. The pull-out tester according to any one of 6 above. By attaching and rotating the probe, the probe is screwed into the object to be measured, and the probe is attached to the pull-out tester main body of the pull-out tester by detachably attaching it to the main body of the pull-out tester. A probe mounting tool,
The probe mounting tool includes a neck and a body, and the body has a rectangular outer shape in plan view, and has a probe mounting and fixing portion at a lower portion thereof, and the largest part of the head in plan view. The probe mounting tool is characterized in that the size of the probe is smaller than the diameter of the inscribed circle of the body portion.   The side shape of the neck head of the probe mounting tool can be inserted from the side into the groove of the lifting tool formed so as to open on the lower and side surfaces of the lifting tool. The probe mounting tool according to claim 8, wherein the probe mounting tool has a shape suspended by a holding tool. The pull-out tester main body to which the probe is mounted by the probe mounting tool includes a main body frame, a spindle screw, a driving long nut, a universal joint body, a load cell, and a lifting tool.
The main body frame has a leg portion and a bridge portion, and the bridge portion is formed with an insertion hole through which the spindle screw is movably inserted in the up and down direction.
The driving long nut is provided on the bridge portion so as to be rotatable without moving in the vertical direction at a position corresponding to the insertion hole.
The main shaft screw is inserted through the insertion hole, is screwed into the driving long nut, and is rotated so that the driving long nut rotates, and a universal joint body is provided at the lower end of the main shaft screw. The probe mounting tool according to claim 9, wherein a hanging tool is attached to the probe mounting tool.

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