JP6239240B2 - Load measuring device mounting device - Google Patents

Description

  The present invention relates to a load measuring instrument mounting device, for example, a load measuring meter mounting device for mounting an annular load measuring meter for measuring a fixing load of a buried anchor partially buried in an installation surface around the buried anchor. About.

  Anchors are widely used for applying compressive stress in advance with prestolic concrete and for damming up earth and sand on sloping ground. This anchor is installed so that a part of it is buried on the installation surface of the ground or the like.

  However, when the tension in the installation ground is loosened due to secular change, the anchor cannot obtain a predetermined support strength and does not make sense for installation. Moreover, when the tension | tensile_strength in an installation ground increases excessively when the load more than assumption is added to an anchor, anchor itself will be damaged, it may jump out to the ground surface, and safety | security may be impaired. For this reason, it is necessary to measure the change in the tension force of the buried anchor buried in the installation surface such as the ground using a load measuring meter.

  In Patent Document 1, as a technique of a rebar pull-out test apparatus, it is disclosed that a pull-out resistance of a rebar (anchor) extending on concrete is measured using a pair of hydraulic jacks. Each hydraulic jack has two extendable rods. The reinforcing bar pull-out test apparatus drives the hydraulic jack while holding the reinforcing bar to extend the rod, applies a pulling force to the reinforcing bar, and measures the pulling strength (fixing load of the reinforcing bar).

  In Patent Document 2, as an example of an apparatus using a load measuring meter, an annular washer, an annular load meter, and another annular washer are provided along an anchor axis protruding on the foundation concrete installation surface. There is disclosed an anchor pull-out tester in which each of them is provided so as to be sequentially stacked so as to surround the axis of the anchor. In this anchor pull-out tester, an annular washer, an annular load meter, and another annular washer are stacked and installed, and then a nut is screwed onto the anchor from the tip end side of the anchor to apply a compressive load to the load meter. In addition, the anchor load of the buried anchor is measured.

JP 2011-106971 A Japanese Patent No. 3146805

  However, in the technique described in Patent Document 1, it is necessary to provide two hydraulic jacks having a complicated and large structure, and the size of the apparatus becomes very large, and there is an obstacle near the anchor. However, there is a problem that the anchor fixing load cannot be measured.

Further, in the technique described in Patent Document 2, when a large gap is generated between the outer peripheral surface of the anchor and the inner peripheral surface of the hole provided in the annular central portion of the load meter, The center part and the central axis of the anchor may be greatly displaced, and the load meter may be disposed on the installation surface. At this time, the distance between each of the plurality of strain gauges attached in the circumferential direction of the hole of the load meter and the outer peripheral surface of the anchor varied, and the fixing load of the buried anchor could not be measured accurately.

  The present invention has been made in view of such circumstances, and even when an obstacle is provided in the vicinity of the anchor, the load measurement can stably attach the load measuring instrument around the anchor. A meter mounting device is provided.

In order to solve the above problems, the present invention takes the following means (1) to (10).
(1) A load measuring instrument mounting apparatus according to the present invention is a load measuring instrument mounting apparatus for mounting an annular load measuring instrument for measuring a fixing load of a buried anchor partially buried in an installation surface around the buried anchor. An annular holding plate having a perforated plate having a hole and attached on the installation surface so as to surround an outer periphery of a protruding portion which is a portion of the buried anchor protruding on the installation surface. The upper frame and the lower frame are made of a perforated annular body incorporated so as to face each other via a bearing mechanism, and the upper surface of the load measuring meter mounted on the annular holding plate so as to surround the outer periphery of the protruding portion. An annular bearing disposed in contact with the annular bearing; and the load mounted on the annular bearing and mounted between the annular holding plate and the annular bearing. A fastening portion fastened to the protruding portion so as to sandwich and tighten the measuring meter, and when the load measuring meter is mounted on the annular holding plate, the extending direction of the protruding portion is approximately In the vertical direction, the maximum outer dimension (excluding the protruding portion) of the annular holding plate is the same as or smaller than the maximum outer dimension of the load measuring instrument.
If the maximum external dimension excluding the protrusion of the annular holding plate is less than or equal to the maximum external dimension of the load measuring instrument, the annular holding plate will not protrude outward from the load measuring instrument and the protruding part of the annular holding plate If the maximum outer dimension excluding is smaller than the maximum outer dimension of the load measuring instrument, the grounding portion of the load measuring instrument can be configured in a range smaller than the maximum outer dimension of the load measuring instrument. For this reason, even if there is an obstacle near the load measuring instrument, or when the installation area around the load measuring instrument is not flat, even if the installation area of the load measuring instrument is restricted in the vicinity, the annular holding plate is loaded. It can be securely stored at the bottom of the meter.

(2) The load measuring meter comprises a cylindrical body provided with a plurality of strain gauges on the upper surface of the circular annular portion.
The perforated holding plate of the annular holding plate is formed of a disc body in which the hole portion is formed in the center portion,
It is preferable that the maximum outer diameter of the disc body of the annular holding plate is smaller than the maximum outer diameter of the cylindrical body of the load measuring meter.
(3) In the load measuring instrument mounting device according to any one of the above, the annular holding plate is
Holding ribs projecting annularly along the hole,
The holding rib is preferably fitted in a measuring hole formed in a central portion of the load measuring meter when the load measuring meter is mounted on the annular holding plate.
(4) In the load measuring instrument mounting device according to any one of the above, the annular holding plate is
An operation piece formed so as to protrude from an outer peripheral surface of the perforated plate in order to adjust an arrangement position of the load measuring meter when the load measuring meter is mounted on the annular holding plate. Item 4. The load measuring instrument mounting device according to Item 3.
(5) In the load measuring instrument mounting device according to any one of the above, the load measuring instrument has a connector portion that is attached to protrude from a side portion of the annular measuring meter body,
The operation piece is preferably formed to be smaller than the outer shape of the connector portion.
(6) In the load measuring instrument mounting device according to any one of the above,
The load measuring instrument has a connector part that is attached to protrude from the side part of the annular measuring instrument body,
When the load measuring instrument is mounted on the annular holding plate, when the operation piece and the connector portion are projected onto the installation surface along the extending direction of the protruding portion, the operation piece is connected to the connector. It is preferable to arrange | position inside a part.
(7) In the load measuring instrument mounting device according to any one of the above, the load measuring instrument has a connector portion that is attached to protrude from a side portion of the annular measuring meter body,
The width dimension of the operation piece in the outer peripheral direction of the perforated plate is preferably smaller than the width dimension of the connector portion in the outer peripheral direction of the measurement meter main body of the load measuring meter.
(8) In the load measuring instrument mounting device according to any one of the above, the bearing mechanism of the annular bearing includes a plurality of cylindrical rolling elements arranged radially on the same plane from the center of the perforated annular body. It is preferable to have.
(9) In the load measuring instrument mounting apparatus according to any one of the above, the apparatus includes a mounting table and a plurality of legs, and includes a table provided between the front installation surface and the annular holding plate,
It is preferable that the annular holding plate is attached on the mounting table described above instead of on the installation surface.
(10) In the load measuring instrument mounting device according to any one of the above, the projecting portion is configured by a portion of the buried anchor projecting on the installation surface and a connecting anchor coupled thereto. Is preferred.

  According to the load measuring instrument mounting device according to the present invention, even if an obstacle is provided in the vicinity of the anchor, the load measuring instrument can be stably mounted around the anchor.

It is a disassembled perspective view which shows the structure of the load measuring device attachment apparatus in the 1st Embodiment of this invention. It is a sectional side view which shows the structure of the load measuring device attachment apparatus in the 1st Embodiment of this invention. It is a plane sectional view showing the composition of the load measuring instrument attachment device in the 1st embodiment of the present invention, and is a figure showing the AA section of Drawing 2. It is a sectional side view which shows the state by which the load measuring meter was arrange | positioned and shifted | deviated with respect to the burying anchor. FIG. 5 is a cross-sectional plan view showing a state in which the load measuring instrument is displaced with respect to the buried anchor and is a cross-sectional view taken along the line BB in FIG. It is (a) front view of a ring bearing, and (b) side sectional view in a CC cut surface. It is a sectional side view which shows the structure of the load measuring meter attachment apparatus in the 2nd Embodiment of this invention. It is a disassembled perspective view which shows the structure of the load measuring meter attachment apparatus in the 3rd Embodiment of this invention.

<First Embodiment>
The structure of the load measuring instrument mounting apparatus in the 1st Embodiment of this invention is demonstrated based on figures.

  FIG. 1 is an exploded perspective view showing the configuration of the load measuring instrument mounting device according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the configuration of the load measuring instrument mounting device according to the first embodiment of the present invention. FIG. 3 is a partial cross-sectional view showing the configuration of the load measuring instrument mounting device according to the first embodiment of the present invention, and is a view showing the AA section of FIG.

As shown in FIG. 1, the load measuring device mounting apparatus of the present invention attaches an annular load measuring device L around the buried anchor B for measuring the fixing load of the buried anchor B partially buried in the installation surface. It is a device for.
As shown in FIGS. 1 and 2, the load measuring device mounting device of the present invention is configured to include a perforated plate 1, an annular bearing 2, and a fastening portion 3.
As shown in FIGS. 1 and 2, the annular holding plate 1, the load measuring meter L, the annular bearing 2, and the fastening portion 3 are sequentially overlapped along the extending direction of the buried anchor B. A method for attaching the load measuring meter L to the buried anchor B using the load measuring meter attaching device will be described in detail later.

  Here, before describing the configuration of the load measuring instrument mounting device of the present invention, the configuration of the buried anchor B and the load measuring meter L will be described first.

  The buried anchor B is an anchor partially buried in the installation surface such as concrete. By utilizing the tensile force of the anchor, it is possible to prevent the installation surface such as the ground from collapsing. Anchors are prestressed concrete for precompressing stress, damming up sediments on slopes, stabilizing slopes such as cliffs, or preventing the structure from falling or lifting, It is mainly used in the civil engineering and construction field for the construction of retaining dams. The buried anchor B is a concept including a ground anchor.

  A specific configuration of the buried anchor B will be described. The buried anchor B has a fixing portion that is buried in the installation surface and fixed on the installation surface, and a protruding portion that is exposed to protrude on the installation surface. Further, in the circumferential direction of the buried anchor B, a screw thread to which the fastening portion 3 is screwed is formed.

  Installation of the buried anchor B is performed as follows. First, after inserting one end of the anchor into the installation surface, the fixing portion is filled with grout, and the anchor fixing portion is fixed in the installation surface.

As shown in FIG. 1, the load measuring instrument L includes a measuring instrument main body LA, a measuring instrument hole LH, a display (not shown), a cable LC connecting the measuring main body LA and the display, and a cable. It is comprised from connector part LK which connects LC and the measurement main body LH. The measuring instrument main body LA is formed of a cylindrical body, and a plurality of strain gauges (not shown) as pressure-sensitive strain sensors are provided on the upper surface of the circular annular portion on the upper surface. However, the shape of the measuring instrument main body LA is not limited to the cylindrical body. The measurement hole LH is formed at the center of the measurement main body LH. The connector LK connects the cable LC and the measurement main body LH on the measurement main body LA side. The connector portion LK is attached so as to protrude from the side portion of the annular measuring meter body LA.
The configuration of the buried anchor B and the load measuring meter L has been described above.

  Next, specific configurations of the annular holding plate 1, the annular bearing 2, and the fastening portion 3 will be described as components of the load measuring instrument mounting device of the present invention.

  As shown in FIGS. 1 and 2, the annular holding plate 1 has a perforated plate 10, a hole 1 </ b> H, a holding rib 1 </ b> F, and an operation piece 1 </ b> L.

  The perforated plate 10 is constituted by a disc body. However, the shape of the perforated plate 10 is not limited to a disc body. The hole 1 </ b> H is formed so as to penetrate the central part of the perforated plate 10. The annular holding plate 1 is attached on the installation surface so as to surround the outer periphery of the protruding portion which is a portion of the buried anchor B protruding on the installation surface. Therefore, the inner diameter of the hole 1H is set to be at least larger than the outer diameter of the buried anchor B.

  Moreover, as FIG. 1 and FIG. 2 show, the holding rib 1F is formed as the protruding item | line which protruded cyclically | annularly along the hole 1H. When the load measuring meter L is mounted on the annular holding plate 1, the outer peripheral portion of the protruding strip portion of the holding rib 1 </ b> F is inserted into the measuring meter hole LH formed in the central portion of the load measuring meter L. . Thus, by inserting the holding rib 1F into the measurement hole LH of the load measuring meter L, the holding position of the annular holding plate 1 with respect to the load measuring meter L can be determined. When the load measuring meter L is positioned and held on the annular holding plate 1 by the holding rib 1F, the load measuring meter L can be moved along with the movement of the annular holding plate 1. For example, by adjusting the position of the annular holding plate 1 during or after the assembly of the apparatus, the position of the load measuring meter L inserted into the holding rib 1F can be accurately adjusted.

As shown in FIG. 1 and FIG. 2, the operation piece 1 </ b> L is formed as a strip plate that protrudes to a part of the circumferential direction of the perforated plate of the annular holding plate 1. The operation piece 1L is used for the purpose of position adjustment when the load measuring meter L is attached on the annular holding plate 1 or when the load measuring meter L is attached on the annular holding plate 1.
In other words, the load measuring instrument mounting device of the present invention has a structure in which a load measuring instrument arranged on the installation surface is fixed and installed so as to be sandwiched from above by the annular bearing 2 and the fastener 3. When the measuring instrument or the annular bearing 2 and the fastener 3 are fixed, there is a problem that the cylindrical center of the cylindrical load measuring instrument L is easily displaced from the center position of the buried bolt B. When the center of the cylindrical load measuring instrument L is shifted from the center position of the buried bolt B, the load measuring instrument is subject to a partial load in the circumferential direction depending on the degree of the deviation. As a result, accurate load measurement may not be possible.
That is, in order to accurately measure the fixing force of the buried bolt B, it is preferable that the cylindrical center of the cylindrical load measuring meter L matches the center position of the buried bolt B as much as possible. On the other hand, the operation piece 1L is held while the annular bearing 2 or the fastener 3 is fixed, or the operation piece 1L is pushed and pulled after temporary fixing, so that the center of the annular holding plate 1 is Is adjusted to the center of the buried bolt B, and thereby the position of the load measuring instrument can be adjusted.

  Here, as shown in FIGS. 1 and 2, the maximum outer diameter 1D of the perforated plate 10 of the annular holding plate 1 is set to be smaller than the maximum outer diameter LD of the cylindrical body of the load measuring meter L. Has been. That is, when the load measuring meter L is mounted on the annular holding plate 1, the maximum external dimension of the annular holding plate 1 in the direction substantially perpendicular to the extending direction of the protruding portion of the buried anchor B is the load measuring meter. It is smaller than the maximum outer dimension of L.

  As shown in FIGS. 1 and 2, the annular bearing 2 is configured by a perforated annular body that is incorporated so that the upper frame 2P and the lower frame 2P face each other via the bearing mechanism 2B. An annular groove 2D is formed on the inner surfaces of the upper frame 2P and the lower frame 2P. The annular bearing 2 is disposed in contact with the load measuring meter L attached on the annular holding plate 1 so as to surround the outer periphery of the protruding portion of the buried anchor B.

The fastening part 3 is formed in a cylindrical shape. The fastening portion 3 includes a fastening portion main body 31, a flange portion 32, and a hexagon nut portion 33 in order from the bottom. The fastening part main body 31 is formed in a cylindrical shape. Further, a thread is formed on the inner wall of the cylindrical portion of the fastening portion main body 31. The thread is formed so as to correspond to the thread formed on the protrusion of the buried anchor B. The flange portion 32 is formed in a disk shape so as to protrude from the fastening portion main body 31 along the outer periphery of the fastening portion main body. The lower surface of the flange portion 32 is in contact with the upper surface of the upper frame 2P of the annular bearing portion 2 as shown in FIG. The hexagonal nut portion 33 is used when the fastening portion 2 is screwed to the protruding portion of the buried anchor B.

As shown in FIGS. 1 and 2, the fastening portion 3 is embedded on the annular bearing 2 so that the load measuring meter L attached between the annular holding plate 1 and the annular bearing 2 is sandwiched and tightened. Fastened to the protrusion of the anchor B. More specifically, the fastening portion 3 is attached to the buried anchor B from the distal end side of the protruding portion of the buried anchor B after being attached on the annular bearing 2. Then, the fastening portion 3 is screwed into the protruding portion of the buried anchor B, and the load measuring meter L attached between the annular holding plate 1 and the annular bearing 2 is sandwiched and tightened. Thereby, the fastening portion 3 is fastened to the protruding portion of the buried anchor B.

  Next, a method for measuring the fixing load of the buried anchor B by attaching the load meter L to the buried anchor B using the load measuring instrument mounting device of the present invention will be described with reference to the drawings.

  First, as shown in FIGS. 1 and 2, the annular holding plate 1 is attached to the protruding portion of the buried anchor B exposed on the installation surface. Specifically, the annular holding plate 1 is placed on the installation surface so that the protruding portion of the buried anchor B is inserted into the hole 1H of the annular holding plate 1.

  Next, as shown in FIGS. 1 and 2, the load measuring meter L is arranged on the annular holding plate 1, and the load measuring meter L is attached to the protruding portion of the buried anchor B. Specifically, the load measuring meter L is placed on the annular holding plate 1 such that the protruding portion of the buried anchor B is inserted into the measuring meter hole LH of the load measuring meter L.

  Next, as shown in FIGS. 1 and 2, the annular bearing 2 is placed on the load measuring meter L, and the annular bearing 2 is attached to the protrusion of the buried anchor B. Specifically, the annular bearing 2 is placed on the load measuring meter L so that the protruding portion of the buried anchor B is inserted into the hole at the center of the annular bearing 2.

  Next, as shown in FIGS. 1 and 2, the fastening portion 3 is disposed on the annular bearing 2, and the fastening portion 3 is attached to the tip portion of the protruding portion of the buried anchor B. Specifically, the fastening portion 3 is screwed into the screw portion at the tip of the protruding portion of the buried anchor B to which the annular holding plate 1, the load measuring meter L, and the annular bearing 2 are attached on the installation surface. Thereby, the annular holding plate 1, the load measuring meter L, the annular bearing 2, and the fastening portion 3 are sequentially stacked in the extending direction of the buried anchor B.

  At this time, the placement position of the load measuring meter L can be adjusted using the operation piece 1L in a state where the fastening portion 3 is temporarily fastened to the screw portion at the tip of the protruding portion of the buried anchor B. A method of adjusting the arrangement position of the load measuring meter L using the operation piece 1L will be described with reference to FIGS.

  FIG. 4 is a cross-sectional view showing a state in which the load measuring device L is displaced with respect to the buried anchor B. FIG. 5 is a cross-sectional view showing a state in which the load measuring meter L is displaced with respect to the buried anchor B, and is a cross-sectional view taken along the line BB of FIG.

  That is, as shown in FIG. 4 and FIG. 5, the buried anchor B may be arranged at a position shifted from the center of the measurement hole LH of the load measurement meter L. At this time, the distance between each of the plurality of strain gauges provided on the upper surface of the circular annular portion of the measuring instrument main body LA of the load measuring instrument L and the outer peripheral surface of the buried anchor B varies, and the fixing load of the buried anchor is determined. May not be measured accurately.

Therefore, in the load measuring meter mounting device of the present invention, the operation piece 1L is provided on the annular holding plate 1 so that the position of the load measuring meter L can be adjusted using the operation piece 1l. That is, in the state shown in FIGS. 4 and 5, the load measuring meter L is arranged such that the operation piece 1 </ b> L is picked with a finger and the buried anchor B is arranged at the center of the measuring hole LH of the load measuring meter L. Can be moved on the installation surface.

Thereby, the burying anchor B can be arrange | positioned in the center part of the measurement hole part LH of the load measuring meter L. FIG. As a result, variation in the distance between each of the plurality of strain gauges of the load measuring meter L and the outer peripheral surface of the buried anchor B can be reduced, so that the fixing load of the buried anchor can be accurately measured.

  1 and 2, the fastening portion 3 that is screwed into the protruding portion of the buried anchor B is further turned and tightened, whereby the fastening portion 3 is fastened to the protruding portion of the buried anchor B. As a result, the load measuring meter L is clamped between the annular holding plate 1 and the annular bearing 2 and tightened. As a result, a load is applied to the plurality of strain gauges of the load measuring meter L, and the fixing load of the buried anchor B on the installation surface can be measured.

  Here, as described above with reference to FIGS. 1 and 2, the maximum outer diameter 1D of the perforated plate 10 of the annular holding plate 1 is made smaller than the maximum outer diameter LD of the cylindrical body of the load measuring meter L. Is set. That is, when the load measuring meter L is mounted on the annular holding plate 1, the maximum external dimension of the annular holding plate 1 in the direction substantially perpendicular to the extending direction of the protruding portion of the buried anchor B is the load measuring meter. It is smaller than the maximum outer dimension of L.

  Therefore, as shown in FIG. 3, when the load measuring device L is attached to the buried anchor B using the load measuring device attaching device, the perforated plate 10 of the annular holding plate 1 becomes the cylinder of the load measuring device L. Protruding outward from the body can be suppressed. Thereby, as shown in FIG. 3, even when an obstacle such as a wall F is provided in the vicinity of the buried anchor B, the load measuring meter L can be stably attached around the buried anchor B. Can do.

  Next, the size relationship between the operation piece 1L and the connector portion LK will be described with reference to FIG. In FIG. 3, the connector part LK and the cable LC of the load measuring meter L are indicated by a two-dot chain line.

  As shown in FIG. 3, the operation piece 1L is formed to be smaller than the outer shape of the connector part LK. That is, as shown in FIG. 3, when the load measuring meter L is mounted on the annular holding plate 1, the operation piece 1 </ b> L and the connector part LK are installed along the extending direction of the protruding part of the buried anchor B. When projecting onto the connector portion LK, the operation piece 1L is disposed inside the connector portion LK. At this time, the width dimension of the operation piece 1L in the outer circumferential direction of the perforated plate 10 is smaller than the width dimension of the connector portion LK in the outer circumferential direction of the measurement main body LA of the load measuring meter L.

  Thus, when the operation piece 1L and the connector portion LK are projected onto the installation surface along the extending direction of the protruding portion of the buried anchor B, the operation piece 1L is stored in a minimum range where it overlaps the connector portion LK. For this reason, even within a narrow installation area, the influence on obstacles in the vicinity of the anchor can be reduced, and the load measuring instrument can be stably attached around the anchor.

  Next, a detailed configuration of the annular bearing 2 will be described. FIG. 6 is a diagram showing the configuration of the annular bearing 2. FIG. 6A is a front view of the annular bearing 2. FIG. 6B is a cross-sectional view taken along the line C-C in FIG.

  As shown in FIGS. 6 (a) and 6 (b), the annular bearing 2 is constituted by a perforated annular body in which the upper frame 2P and the lower frame 2P are incorporated so as to face each other via the bearing mechanism 2B. ing. An annular groove 2D is formed on the inner surfaces of the upper frame 2P and the lower frame 2P. Moreover, the bearing mechanism 2B of the annular bearing 2 has a plurality of cylindrical rolling elements arranged radially on the same plane from the center of the perforated annular body. In this way, by configuring the bearing mechanism 2B with a plurality of cylindrical rolling elements, the upper frame 2P and the lower frame 2P can be made even with a low load compared to the case where the bearing mechanism 2B is configured with a plurality of spherical rolling elements. Smooth relative rotation can be achieved. For this reason, configuring the bearing mechanism 2B with a plurality of cylindrical rolling elements is suitable when the rotational load is small.

  As described above, the load measuring instrument mounting device according to the first embodiment of the present invention uses the annular load measuring instrument L that measures the fixing load of the buried anchor B partially buried in the installation surface as the buried anchor B. It is a device for attaching to the surroundings. The load measuring instrument mounting device includes an annular holding plate 1, an annular bearing 2, and a fastening portion 3.

  The annular holding plate 1 has a perforated plate 10 having a hole 1H, and is attached on the installation surface so as to surround the outer periphery of the protruding portion which is a portion of the buried anchor B protruding on the installation surface. The annular bearing 2 is composed of a perforated annular body in which the upper frame 2P and the lower frame 2P are assembled so as to face each other via the bearing mechanism 2B, and is mounted on the annular holding plate 1 so as to surround the outer periphery of the protruding portion. It is disposed in contact with the measuring meter L. The fastening portion 3 is attached on the annular bearing 2 and fastened to the protruding portion so as to sandwich and tighten the load measuring meter L attached between the annular holding plate 1 and the annular bearing 2. When the load measuring meter L is mounted on the annular holding plate 1, the maximum outer dimension of the annular holding plate 1 is the maximum outer shape of the load measuring meter L in a direction substantially perpendicular to the extending direction of the protrusion. Smaller than dimensions.

  As described above, according to the present invention, when the load measuring meter L is mounted on the annular holding plate 1, the maximum outer shape of the annular holding plate 1 is substantially perpendicular to the extending direction of the protruding portion of the buried anchor B. The dimension is smaller than the maximum external dimension of the load measuring instrument L. For this reason, when the load meter L is attached to the buried anchor B using the load meter attachment device, the perforated plate 10 of the annular holding plate 1 protrudes outward from the cylindrical body of the load meter L. Can be suppressed. Thereby, even if an obstacle such as the wall F is provided in the vicinity of the buried anchor B, the load measuring meter L can be stably attached around the buried anchor B.

  Further, in the load measuring instrument mounting device according to the first embodiment of the present invention, the load measuring instrument L is composed of a cylindrical body provided with a plurality of strain gauges on the upper surface of the circular annular portion. Further, the perforated holding plate 10 of the annular holding plate 1 is formed of a disc body in which a hole 1H is formed at the center. Further, the maximum outer diameter of the disc body of the annular holding plate 1 is smaller than the maximum outer diameter of the cylindrical body of the load measuring meter L.

  Thus, the maximum outer diameter 1D of the perforated plate 10 of the annular holding plate 1 is set to be smaller than the maximum outer diameter LD of the cylindrical body of the load measuring meter L. For this reason, when the load meter L is attached to the buried anchor B using the load meter attachment device, the perforated plate 10 of the annular holding plate 1 protrudes outward from the cylindrical body of the load meter L. Can be suppressed. Thereby, even if an obstacle such as the wall F is provided in the vicinity of the buried anchor B, the load measuring meter L can be stably attached around the buried anchor B.

  In the load measuring instrument mounting device according to the first embodiment of the present invention, the annular holding plate 1 has a holding rib 1F that protrudes annularly along the hole 1H. The holding rib 1 </ b> F is fitted into a measuring hole LH formed at the center of the load measuring meter L when the load measuring meter L is mounted on the annular holding plate 1.

  As described above, by inserting the holding rib 1F into the measurement hole LH of the load measuring meter L, the positioning of the annular holding plate 1 with respect to the load measuring meter L is facilitated. Further, the load measuring meter L can be moved by moving the annular holding plate 1.

  In the load measuring instrument mounting device according to the first embodiment of the present invention, the annular holding plate 1 has an operation piece 1L. The operating piece 1L is formed so as to protrude from the outer peripheral surface of the perforated plate 10 in order to adjust the arrangement position of the load measuring meter L when the load measuring meter L is mounted on the annular holding plate 1. ing.

  Thereby, when the load measuring meter L is attached on the annular holding plate 1, the arrangement position of the load measuring meter L can be easily adjusted.

  In the load measuring instrument attachment device according to the first embodiment of the present invention, the load measuring instrument L has a connector part LK attached so as to protrude from the side part of the annular measuring instrument main body LA. The operation piece 1L is formed to be smaller than the outer shape of the connector part LK. That is, when the load measuring meter L is mounted on the annular holding plate 1, when the operation piece 1L and the connector portion LK are projected onto the installation surface along the extending direction of the protruding portion, the operation piece 1L is connected to the connector portion. Arranged inside the LK. At this time, the width dimension of the operation piece 1L in the outer circumferential direction of the perforated plate 10 is smaller than the width dimension of the connector portion LK in the outer circumferential direction of the measurement main body LA of the load measuring meter L.

  Thereby, when the operation piece 1L and the connector part LK are projected on the installation surface along the extending direction of the protruding part of the buried anchor B, the operation piece 1L is stored in a minimum range where it overlaps the connector part LK. For this reason, even within a narrow installation area, the influence on obstacles in the vicinity of the anchor can be reduced, and the load measuring instrument can be stably attached around the anchor.

  In the load measuring instrument mounting device according to the first embodiment of the present invention, the bearing mechanism 2B of the annular bearing 2 includes a plurality of cylindrical rolling elements arranged radially on substantially the same plane from the center of the perforated annular body. Have

  In this way, by configuring the bearing mechanism 2B with a plurality of cylindrical rolling elements, the upper frame 2P and the lower frame 2P can be made even with a low load compared to the case where the bearing mechanism 2B is configured with a plurality of spherical rolling elements. Smooth relative rotation can be achieved. For this reason, configuring the bearing mechanism 2B with a plurality of cylindrical rolling elements is suitable when the rotational load is small.

<Second Embodiment>
The structure of the load measuring instrument mounting apparatus in the 2nd Embodiment of this invention is demonstrated based on figures. FIG. 7 is a cross-sectional view showing the configuration of the load measuring instrument mounting device according to the second embodiment of the present invention.

  As shown in FIG. 7, the load measuring instrument mounting device according to the second embodiment of the present invention includes a perforated plate 1, an annular bearing 2, a fastening portion 3, a connecting anchor 4, and a table 5. It is prepared for. In FIG. 7, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals as those shown in FIGS.

  Here, FIG. 2 and FIG. 7 are compared. The load measuring instrument mounting apparatus shown in FIG. 7 is different from the load measuring instrument mounting apparatus shown in FIG. 2 in that the connecting anchor 4 and the table 5 are provided.

  As shown in FIG. 7, the connection anchor 4 is connected to a portion of the buried anchor B that protrudes on the installation surface. The connection anchor 4 includes an extension anchor 40 and a connection part 41. The outer diameter of the extension anchor 40 is substantially the same as the outer diameter of the buried anchor B. As shown in FIG. 7, the connecting portion 42 is formed in a cylindrical shape. Further, a screw thread is formed on the cylindrical inner wall of the connecting portion 41. For example, the connecting portion 41 is configured to be divided into two semi-cylindrical members. Then, the end of the buried anchor B and the end of the extension anchor 40 are connected by combining these two semi-cylindrical members at the end of the buried anchor B and the end of the extension anchor. And the protrusion part is comprised from the part protruded on the installation surface among the buried anchors B, and the connection anchor 4 connected with this.

  As illustrated in FIG. 7, the table 5 includes a mounting table 51 and at least three or more leg portions 52. The surface of the mounting table 51 is a flat surface, and a mounting table hole 5 </ b> H is formed at the center of the mounting table 51. The plurality of legs 52 can be attached to the mounting table 51. The length of the leg portion 52 can be adjusted according to the distance between the surface of the mounting table 51 and the installation surface.

  Further, as shown in FIG. 7, a protruding portion composed of a portion of the buried anchor B that protrudes on the installation surface and a connecting anchor 4 that is connected thereto is inserted into the mounting table hole portion 5H. Is done.

  Further, as shown in FIG. 7, the annular holding plate 1, the load measuring meter L, the annular bearing 2, and the fastening portion 3 are connected to the portion of the buried anchor B that protrudes on the installation surface and connected thereto. They are arranged on the surface of the mounting table 51 of the table 5 so as to be sequentially overlapped along the extending direction of the protruding portion constituted by the anchor 4.

  Next, using the load measuring instrument mounting device of the present invention, the load measuring instrument is formed on the protruding portion composed of the portion of the buried anchor B protruding on the installation surface and the connecting anchor 4 connected thereto. A method of attaching L and measuring the fixing load of the buried anchor B will be described with reference to the drawings.

  First, as shown in FIG. 7, the connecting anchor 4 is connected to a portion of the buried anchor B protruding on the installation surface. In this way, since the connecting anchor 4 can be connected to the buried anchor B, even if the portion of the buried anchor B protruding on the installation surface is short, the load is measured using the load measuring device attachment device. The measuring meter L can be attached to a protruding portion composed of a portion of the buried anchor B that protrudes on the installation surface and the connecting anchor 4 connected to the portion.

  Next, the table 5 is arranged on the installation surface. At this time, the table 5 is placed so that the protruding portion composed of the portion of the buried anchor B protruding on the installation surface and the connecting anchor 4 connected thereto is inserted into the mounting table hole 5H. Place on the installation surface.

  Next, as shown in FIG. 7, the annular holding plate 1, the load measuring device L, the annular bearing 2 and the fastening portion 3 are connected to the portion of the buried anchor B that protrudes on the installation surface. The protrusions formed of the connecting anchors 4 are sequentially overlapped along the extending direction of the protrusions and are arranged on the surface of the mounting table 51 of the table 5.

  The annular holding plate 1, the load measuring meter L, the annular bearing 2 and the fastening portion 3 are formed into a protruding portion composed of a portion of the buried anchor B protruding on the installation surface and a connecting anchor 4 connected thereto. Since the attachment method conforms to the attachment method of the first embodiment, detailed description is omitted.

  As described above, the load measuring instrument mounting apparatus according to the second embodiment of the present invention has the table 5. The table 5 has a mounting table 51 and a plurality of legs 52. The table 5 is provided between the annular holding plate 1 and the installation surface. Further, the annular holding plate 1 is attached on the mounting table 51 of the table 5 instead of on the installation surface. Thus, by providing the table 5 between the annular holding plate 1 and the installation surface, the load measuring meter L can be arranged at a position higher than the installation surface. As a result, operability can be improved when attaching the annular holding plate 1, the load measuring device L, the annular bearing 2 and the fastening portion 3.

  Moreover, in the load measuring instrument attachment apparatus in the 2nd Embodiment of this invention, a protrusion part is comprised from the part protruded on the installation surface among buried anchors B, and the connection anchor 4 connected with this. Is done.

  In this way, since the connecting anchor 4 can be connected to the buried anchor B, even if the portion of the buried anchor B protruding on the installation surface is short, the load is measured using the load measuring device attachment device. The measuring meter L can be attached to a protruding portion composed of a portion of the buried anchor B that protrudes on the installation surface and the connecting anchor 4 connected to the portion.

<Third Embodiment>
A configuration of the load measuring instrument mounting device according to the third embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a cross-sectional view showing the configuration of the load measuring instrument mounting device according to the third embodiment of the present invention.

  As shown in FIG. 8, the load measuring instrument mounting device according to the third embodiment of the present invention includes the perforated plate 1, the double washers 210 and 220, and the fastening portion 30. In FIG. 8, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals as those shown in FIGS.

  Here, FIG. 1 is compared with FIG. 8 includes a double washer in which a lower washer 210 and an upper washer 220 are stacked in place of the annular bearing 2, and a middle column portion 320 in place of the fastening portion 3. 1 is different from the load measuring instrument mounting apparatus shown in FIG. 1 in that the fastening insertion section 30 having the insertion section main body 310 is provided.

  The fastening insertion part 30 has a fastening insertion part 310, a column part 320 made of a cylinder whose diameter is larger than that of the fastening insertion part, and a hexagonal nut part 30 in order from the bottom. It is inserted and arranged in the measuring hole LH via the double washers 210 and 220 which are arranged on the load measuring meter L.

  The insertion portion main body 310 is formed of a cylindrical body having a smaller diameter than the measurement meter hole portion LH of the load measurement meter L, and is inserted into the upper portion of the measurement meter hole portion LH via the double washers 210 and 220. Further, a screw thread is formed on the inner wall of the cylindrical hole of the insertion portion main body 310. The thread is formed so as to correspond to the thread formed on the protrusion of the buried anchor B. The middle column part 320 is formed to bulge in a larger diameter than the insertion part body 310 along the outer periphery of the insertion part body 310, and when the insertion part body 310 is inserted into the measurement hole LH, the middle column part is formed. 320 is disposed in contact with the upper surface of the upper washer 220 of the double washer. Here, on the lower surface of the middle column part 320, an engaging piece of a lower ridge is formed so as to project to the depression of the upper washer 220, and the middle column part 320 contacts the upper surface of the upper washer 220 of the double washer. When arranged in contact with each other, the engaging piece engages in a recess of the upper washer 220 to perform a function of preventing the upper washer 220 from rotating. The hexagonal nut portion 33 is a hexagonal column-shaped outer peripheral portion, and a cylindrical hole having the same thread as the cylindrical hole of the insertion portion main body 310 is continuously formed from the lower part. The hexagonal nut portion 33 is used when the fastening portion 2 is screwed to the protruding portion of the buried anchor B.

  The present invention has been described above based on the embodiment. The embodiment is an exemplification, and various modifications, increases / decreases, and combinations may be added to the above-described embodiments without departing from the gist of the present invention. For example, a load measuring system comprising a load measuring device holding device and a load measuring device of each embodiment may be configured, and among the load measuring device holding devices of each embodiment, only the annular holding plate 1 is used as the load measuring device L. May be used, or a compression load measuring machine configured by overlapping the annular holding plate 1, the load measuring meter L, and the annular bearing 2 in order from below may be configured. As another configuration example, a nut or an internal screw pipe that is screwed into an embedded bolt or an extension bolt may be used instead of the fastening portion 30 and the insertion fastening portion 30 of each embodiment. Further, the operation piece 1L of the annular holding plate 1 may be formed of an oblique plate that is bent upward from the plate surface and extends obliquely upward, or a hook-like plate that is bent at two locations in the thickness direction. It will be understood by those skilled in the art that modifications including these changes, increases / decreases, and combinations, including the omission of the operation piece 1L, are within the scope of the present invention.

1 annular holding plate 10 perforated plate 1H hole 1F holding rib 1L operation piece 2 annular bearing 2P upper frame, lower frame 2B bearing mechanism 2D annular groove 3 fastening part 4 coupling anchor 41 extension anchor 42 coupling part 5 table 51 mounting table 52 Leg L Load measuring instrument LA Measuring instrument main body LC Cable LH Measuring meter hole LK Connector part

Claims (9)

A load measuring instrument mounting device for mounting an annular load measuring instrument for measuring a fixing load of a buried anchor partially buried in an installation surface around the buried anchor,
An annular holding plate that has a perforated plate having a hole, and is attached to the installation surface so as to surround an outer periphery of a protruding portion that is a portion of the buried anchor that protrudes on the installation surface;
The upper frame and the lower frame are formed of a perforated annular body that is incorporated so as to face each other via a bearing mechanism, and are applied on the load measuring instrument that is mounted on the annular holding plate so as to surround the outer periphery of the protruding portion. An annular bearing arranged in contact with each other;
A fastening portion that is mounted on the annular bearing and fastened to the projecting portion so as to sandwich and tighten the load measuring instrument attached between the annular holding plate and the annular bearing;
The annular holding plate includes a holding rib that protrudes annularly upward from the plate surface along the hole , and an operation piece that extends and has an upper surface that is flush with the upper surface of the annular holding plate. Have
The holding rib is inserted into a hole edge at a lower end of a measurement meter hole portion formed in a central portion of the load measurement meter when the load measurement meter is mounted on the annular holding plate,
In addition, the operation piece is a part from a part of the outer periphery of the perforated plate to the side in order to adjust the arrangement position of the load measuring meter when the load measuring meter is mounted on the annular holding plate. A load meter mounting device that protrudes from the surface. The load measuring instrument has a connector part that is attached to protrude from the side part of the annular measuring instrument body,
The load measuring meter mounting device according to claim 1, wherein the operation piece is a rectangular piece and is formed so that a width dimension of the rectangular piece is smaller than an outer shape of the connector portion . The load measuring instrument has a connector part that is attached to protrude from the side part of the annular measuring instrument body,
When the load measuring instrument is mounted on the annular holding plate, when the operation piece and the connector portion are projected onto the installation surface along the extending direction of the protruding portion, the operation piece is connected to the connector. The load measuring instrument mounting device according to claim 1 , wherein the load measuring meter mounting device is disposed inside the portion. The load measuring instrument has a connector part that is attached to protrude from the side part of the annular measuring instrument body,
A width dimension of the operation piece in the outer peripheral direction of the perforated plate is smaller than a width dimension of the connector portion in the outer peripheral direction of the measurement main body of the load measuring meter, and the operation piece in the radial direction of the perforated plate. of which one end protrudes outward from the outer shape of the meter body of the load meter, a load meter mounting device according to any one of claims 1, 2 or 3,. The bearing mechanism of the circular bearing has a plurality of cylindrical rolling elements disposed on substantially the same plane radially from the central portion of the perforated annular member, one of claims 1 to 4, The load measuring instrument mounting device according to Item 1. The load meter consists of a cylindrical body provided with a plurality of strain gauges on the upper surface of the circular annular portion,
The perforated plate of the annular holding plate is formed of a disc body in which the hole is formed in the center,
The maximum outer diameter of the disc body of the annular holding plate is smaller than the maximum outer diameter of the cylindrical body of the load measuring instrument , according to any one of claims 1, 2, 3, 4, or 5. Load measuring device mounting device. The holding rib of the annular holding plate has a rectangular cross section,
The holding rib is inserted into a hole edge at a lower end of a measuring hole formed in a central portion of the load measuring meter without a gap when the load measuring meter is mounted on the annular holding plate. Item 7. The load measuring instrument mounting device according to any one of Items 1, 2, 3, 4, 5, or 6 . A mounting table and a plurality of legs, and a table provided between the installation surface and the annular holding plate;
The load according to any one of claims 1, 2, 3, 4, 5, 6, or 7, wherein the annular holding plate is mounted on the mounting table described above instead of on the installation surface. Meter mounting device. The said protrusion part is comprised from the part protruded on the said installation surface among the said embedded anchors, and the connection anchor connected with this, The 1, 2, 3, 4, 5, 6, 7 Or the load measuring instrument mounting device according to any one of 8 above .