JP2020090839A - Inverted post positioning jig - Google Patents

Abstract

To provide a jig capable of positioning an inverted post with a necessary and sufficient accuracy regardless of a simple structure.SOLUTION: A positioning jig 1 includes: a casing 10 arranged in a vertical hole in which an inverted post A is buried; a plurality of support members 20 disposed above an upper end portion 10a of the casing 10; a plate member 30 disposed above the plurality of support members 20 so as to straddle the support members 20; an opening portion 36 which is provided in the plate member 30 and into which the inverted post A can be inserted; and a guide member 40 extending from a peripheral edge of the opening 36 along an insertion direction of the inverted post A. Vertical distances from different two positions in a longer direction of each support member 20 to an upper end of the casing 10 can be respectively adjusted. A position of the plate member 30 with respect to each support member 20 can be adjusted. A length of the guide member 40 is shorter than the whole length of the inverted post A and longer than a half of the whole length of the inverted post A.SELECTED DRAWING: Figure 1

Description

The present invention relates to a jig used for embedding a reverse strut in a reverse striking method.

The method of constructing the basement floor of a building is roughly classified into a "forward driving method" and a "reverse driving method". "Progressive construction method" is a construction method that builds the basement skeletons, etc. from bottom to top, and "Reverse construction method" is a construction method that builds the basement skeletons, etc. from top to bottom. is there. The reverse construction method, which allows the construction of the basement floor and the ground floor at the same time, has the merit of shortening the construction period.

In the reverse construction method in which the skeletons of the basement floor are constructed from the top to the bottom, it is necessary to embed the columns to support the weight of the skeletons of the upper floors in advance. The embedding of the pillar is performed as follows, for example. First, a vertical hole is excavated at a place where a pillar is to be embedded, and concrete is placed in the excavated vertical hole. After that, lift the column with a crane and insert it into the vertical hole. At this time, the lower part of the pillar is buried in concrete for a predetermined length or longer. In addition, concrete may be placed after the support pillar is inserted into the vertical hole. In any case, when the concrete cast in the vertical hole hardens, the lower part of the pillar inserted in the vertical hole is fixed.

Here, the pillar embedded as described above may be a main pillar or a temporary pillar. Further, the above-mentioned support pillar is sometimes called a "true support pillar" when it is a permanent installation pillar, and may be called a "temporary support pillar" when it is a temporary installation pillar. However, the true column and the temporary column are common in the reverse striking method in that they are columns that are embedded in the ground in advance in order to support the weight of the skeleton of the upper floors. Therefore, in this specification, the true column and the temporary column are collectively referred to as "reverse column". That is, the “reverse strut” in the present invention includes both “true strut” and “temporary strut”.

When embedding a counter strut in the ground, high accuracy is required for the position, height, inclination, etc. of the counter strut. Therefore, when embedding the reverse strut, a positioning device or the like as described in Patent Document 1 may be used.

Japanese Patent Publication No. 59-39010

However, the positioning device described in Patent Document 1 is provided with a base frame, a Y-axis carriage provided on the base frame so as to be movable/fixed in the lateral direction, and a vertically movable/fixable body provided on the Y-axis carriage. The structure includes an upper positioning device including an X-axis carriage and a rotary base that is rotatably and fixedly mounted on the X-axis carriage, and has a very complicated structure.

Furthermore, in order to position the counter strut with higher accuracy by using the positioning device described in Patent Document 1, it is necessary to use the upper positioning device and the lower positioning device together. However, the lower positioning device is composed of a base ring having a plurality of cylinders, a plurality of guide rollers and the like, and has a structure equal to or higher than that of the upper positioning device.

In general, the conventional devices and jigs for positioning the counter strut are complicated in structure and require time and labor for assembling and disassembling them on site.

An object of the present invention is to realize a jig capable of positioning a reverse strut with necessary and sufficient accuracy while having a simple structure.

The reverse strut positioning jig of the present invention is a jig for positioning the reverse strut in the reverse striking method. The reverse strut positioning jig of the present invention is formed in a cylindrical shape with both ends in the longitudinal direction opened, and is installed in a vertical hole in which the reverse strut is embedded, and above the upper end of the casing protruding from the ground. A first support member and a second support member that are disposed in the first crossing the upper end opening of the casing, on the first support member and the second support member, and on the first support member and the second support member. A plate member disposed straddling, an opening provided in the plate member, into which the counter strut can be inserted, and a guide member extending from a peripheral edge of the opening along an inserting direction of the counter strut. , With. The vertical distances from two different positions in the longitudinal direction of the first supporting member to the upper end of the casing can be adjusted, and the vertical distances from two different positions in the longitudinal direction of the second supporting member to the upper end of the casing can be adjusted. Each is adjustable. Also, the position of the plate member with respect to the first support member and the second support member can be adjusted. The length of the guide member is shorter than the entire length of the counter striking strut and is longer than 1/2 of the total length of the counter striking strut.

In one aspect of the present invention, the two guide members extend from the peripheral edge of the opening along the inserting direction of the counter strut, and the counter strut passing through the opening is It is surrounded from all sides by the guide members of the book.

In another aspect of the present invention, a pair of first connecting members that respectively connect two different positions in the longitudinal direction of the first supporting member and the upper end portion of the casing, and a longitudinal direction of the second supporting member. A pair of second connecting tools that respectively connect two different locations and the upper end portion of the casing are provided. Each of the first connector and the second connector is a fixing portion fixed to the upper end of the casing,
A tubular portion connected to the fixed portion; and a support portion that is inserted into the tubular portion and has one end side protruding from the tubular portion connected to the first support member or the second support member. However, the protruding length of the support portion with respect to the tubular portion can be changed.

In another aspect of the present invention, the plate member is movable in a direction parallel to the longitudinal direction of the first support member and the second support member, and the first support member and the second support member. It is movable in a direction orthogonal to the longitudinal direction of the member. The plate member moved to an arbitrary position is fixed to the first support member and the second support member by a plurality of fixing tools.

In another aspect of the present invention, the plate member is provided with a locking portion capable of locking a locking tool for lifting all or a part of the reverse strut positioning jig.

ADVANTAGE OF THE INVENTION According to this invention, the jig which can position a reverse strut with necessary and sufficient precision is realized although it is a simple structure.

It is a perspective view showing an example of a positioning jig to which the present invention was applied. It is explanatory drawing which shows the structure of a connection tool. It is explanatory drawing which shows 1 process of the procedure of positioning a reverse strut using the positioning jig shown in FIG. It is explanatory drawing which shows another one process of the procedure of positioning a reverse strut using the positioning jig shown in FIG. It is explanatory drawing which shows another one process of the procedure of positioning a reverse strut using the positioning jig shown in FIG. It is explanatory drawing which shows another one process of the procedure of positioning a reverse strut using the positioning jig shown in FIG.

Hereinafter, an example of an embodiment of a reverse strut positioning jig of the present invention will be described in detail with reference to the drawings. The reverse strut positioning jig according to the present embodiment (hereinafter, simply referred to as "positioning jig 1") is a jig for positioning the reverse strut in the reverse striking method. As shown in FIG. 1, the positioning jig 1 according to this embodiment includes a casing 10, a support member 20, a plate member 30, and a guide member 40.

<Casing>
As shown in FIG. 1, the casing 10 of the positioning jig 1 is formed in a tubular shape with both longitudinal ends (only the upper end is shown in FIG. 1) opened. The casing 10 is installed in a vertical hole excavated in the ground G such that the upper end portion 10 a thereof projects from the ground G. The illustrated casing 10 is formed in a cylindrical shape, and its entire length is longer than the depth of the vertical hole. However, the shape of the casing 10 is not limited to a cylindrical shape as long as it is a cylindrical shape. Further, the casing 10 only needs to have a total length that can be installed in the vertical hole so that the upper end portion 10a thereof projects from the ground G, and does not necessarily have to have a total length equal to or greater than the depth of the vertical hole. Furthermore, if the casing 10 can be held at a desired position, it is not necessary to make the lower end of the casing 10 reach the bottom of the vertical hole. That is, it is not necessary to define the total length of the casing 10 in relation to the depth of the vertical hole.

<Supporting member>
As shown in FIG. 1, the positioning jig 1 has two support members 20 (a first support member 21 and a second support member 22). The first support member 21 and the second support member 22 have substantially the same shape, structure and size. The first support member 21 and the second support member 22 are so-called “H steel” and have a pair of flanges 23 a and 23 b and a web 24. In the following description, the flange 23a of each support member 20 may be referred to as an "upper flange 23a" and the flange 23b may be referred to as a "lower flange 23b" for distinction. Further, the outer surface of the upper flange 23a of each support member 20 may be referred to as the “upper surface” of the support member 20, and the outer surface of the lower flange 23b of each support member 20 may be referred to as the “lower surface” of the support member 20. However, such distinction or designation is merely a distinction or designation for convenience of description.

The first support member 21 and the second support member 22 are arranged above the upper end 10 a of the casing 10 so as to cross the upper end opening 11 of the casing 10. Further, the first support member 21 and the second support member 22 are arranged in parallel or substantially parallel to each other such that the webs 24 face each other in the radial direction of the casing 10.

<Connector>
As shown in FIG. 1, two different locations in the longitudinal direction of the first support member 21 are respectively coupled to the upper end portion 10 a of the casing 10 by a pair of first coupling tools 51. Similarly, two different locations in the longitudinal direction of the second support member 22 are respectively coupled to the upper end portion 10 a of the casing 10 by the pair of second coupling tools 52. More specifically, one location in front of the center of the first support member 21 in the longitudinal direction is connected to the edge of the upper end opening 11 by the first connector 51, and is located behind the center of the first support member 21 in the longitudinal direction. One location is connected to the edge of the upper end opening 11 by another first connecting tool 51.

Similarly, one location in front of the longitudinal center of the second support member 22 is connected to the edge of the upper end opening 11 by the second connector 52, and one location behind the longitudinal center of the second support member 22. Is connected to the edge of the upper end opening 11 by another second connecting tool 52. Note that in FIG. 1, for convenience of drawing, only one of the two second connecting members 52 that connects the second support member 22 to the casing 10 is shown.

The first connector 51 and the second connector 52 have the same shape, structure and size. Therefore, in the following description, the first connector 51 and the second connector 52 may be collectively referred to as the “connector 50”.

As shown in FIG. 2, the connector 50 includes a fixed portion 53 fixed to an edge of the upper end opening 11 of the casing 10 (a pipe wall of the casing 10), and a tubular portion 54 connected to the fixed portion 53. And a support portion 55 that is inserted into the tubular portion 54 so that one end side projects upward from the tubular portion 54. Then, one end of the support portion 55 protruding from the tubular portion 54 is connected to the first support member 21 or the second support member 22.

The fixed portion 53 includes an angle 53a and a bolt 53b. The angle 53a is formed in a substantially L shape that can be hooked on the edge of the upper end opening 11 of the casing 10 (the pipe wall of the casing 10). One end of the angle 53a is arranged outside the pipe wall of the casing 10 and extends downward along the outer peripheral surface of the pipe wall. On the other hand, the other end of the angle 53a is placed on the end surface of the pipe wall of the casing 10, and the end surface faces the inside of the upper end opening 11. The tubular portion 54 is fixed (welded) to one end face of the angle 53a facing the inside of the upper end opening 11.

A screw hole that penetrates the angle 53a arranged outside the pipe wall of the casing 10 is provided at one end side, and a bolt 53b is screwed into the screw hole. The bolt 53b penetrates the threaded hole and is in contact with the outer peripheral surface of the pipe wall. When the bolt 53b is rotated in a predetermined direction and screwed into the threaded hole, the tip surface of the bolt 53b and the outer peripheral surface of the tubular portion 54 are removed. The tube wall is sandwiched between. In this way, the fixing portion 53 including the angle 53a and the bolt 53b is fixed to the upper end of the pipe wall of the casing 10, that is, the upper end 10a of the casing 10.

The support portion 55 is formed into a rod shape that can be inserted into the tubular portion 54, and a male screw is formed on the outer peripheral surface thereof. A collar 56 is attached to the support portion 55, and a female screw that is screwed to a male screw formed on the outer peripheral surface of the support portion 55 is formed on the inner peripheral surface of the collar 56. The male screw formed on the outer peripheral surface of the support portion 55 and the female screw formed on the inner peripheral surface of the collar 56 cooperate to function as a feed screw. Further, an operation pin 56a extending outward in the radial direction of the collar 56 is provided on the outer peripheral surface of the collar 56 so as to project therefrom. The operation pins 56a project on both sides of the collar 56 in the radial direction.

The lower end surface of the collar 56 is in contact with the upper end surface of the tubular portion 54, and when the collar 56 is rotated, the insertion length of the support portion 55 into the tubular portion 54 increases or decreases. Specifically, when the operating pin 56a is gripped and the collar 56 is rotated in the first direction, the support portion 55 is pulled into the tubular portion 54 by the action of the feed screw, and the insertion length of the supporting portion 55 into the tubular portion 54 is increased. Will increase. As a result, the protruding length of the support portion 55 with respect to the tubular portion 54 is reduced. On the other hand, when the operation pin 56a is gripped and the collar 56 is rotated in the second direction opposite to the first direction, the support portion 55 is pulled out from the tubular portion 54 by the action of the feed screw, and the support portion 55 for the tubular portion 54 is drawn. Insertion length is reduced. As a result, the protruding length of the support portion 55 with respect to the tubular portion 54 increases. In this way, the protruding length of the support portion 55 with respect to the tubular portion 54 can be changed. Hereinafter, unless otherwise specified, the term “projection length of the support portion 55” means “projection length of the support portion 55 with respect to the tubular portion 54”.

A plate-shaped abutting portion 55a is provided on the upper end of each supporting portion 55, and each abutting portion 55a is applied to the lower flange 23b of the first supporting member 21 or the second supporting member 22. There is. More specifically, the contact portion 55a provided on the support portion 55 of the first connecting member 51 is directed to the outer surface of the lower flange 23b of the first support member 21, that is, the lower surface of the first support member 21. It is being appreciated. Further, the contact portion 55 a provided on the support portion 55 of the second connecting tool 52 is directed to the outer surface of the lower flange 23 b of the second support member 22, that is, the lower surface of the second support member 22. The respective contact portions 55a and the lower flange 23b are fixed by a clamp 57 (FIG. 1).

Referring back to FIG. As described above, the first support member 21 is supported from below by the support portions 55 of the two first connecting members 51 at the front and rear two locations. Further, the second support member 22 is supported from below at two front and rear positions thereof by the support portions 55 of the two second connecting members 52. Therefore, by changing the protruding length of the support portion 55 included in each of the first connecting members 51, the vertical distances from two different positions in the longitudinal direction of the first supporting member 21 to the upper end of the casing 10 can be adjusted. .. Further, by changing the projecting length of the support portion 55 included in each of the second connecting members 52, it is possible to adjust the vertical distances from two different positions in the longitudinal direction of the second supporting member 22 to the upper end of the casing 10. .. Then, by adjusting the vertical distances from two different positions in the longitudinal direction of the first support member 21 to the upper end of the casing 10, the height and inclination of the first support member 21 are adjusted (changed). Further, the height and the inclination of the second support member 22 are adjusted (changed) by adjusting the vertical distances from two different positions in the longitudinal direction of the second support member 22 to the upper end of the casing 10. That is, the first support member 21 and the second support member 22 are horizontally held at an arbitrary height above the upper end opening 11 of the casing 10 by adjusting the projecting length of the support portion 55 of each coupling tool 50. can do. Of course, one or both of the first support member 21 and the second support member 22 can be tilted at an arbitrary angle.

<Plate member>
As shown in FIG. 1, the plate member 30 is arranged on the first support member 21 and the second support member 22 so as to straddle the first support member 21 and the second support member 22. The plate member 30 includes a pair of vertical plates 31 and 32, and an upper plate 33 and a lower plate 34 that are opposed to each other with the vertical plates 31 and 32 interposed therebetween. The upper plate 33 and the lower plate 34 are rectangular or substantially rectangular, and have the same shape and size. The width of the upper plate 33 and the lower plate 34 is wider than the facing distance between the vertical plates 31 and 32. Therefore, one side in the width direction of the upper plate 33 and the lower plate 34 projects outside the vertical plate 31, and the other side in the width direction of the upper plate 33 and the lower plate 34 projects outside the vertical plate 32.

The plate member 30 is disposed on the first support member 21 and the second support member 22 with the lower plate 34 facing the upper surfaces of the first support member 21 and the second support member 22. Then, the protruding portion of the lower plate 34 protruding to the outside of the vertical plates 31 and 32 is fixed to the upper flanges 23 a of the first support member 21 and the second support member 22 by a clamp 35 as a fixture. However, if the fixation by the clamp 35 is released, the plate member 30 can be moved on the support member 20. Specifically, the plate member 30 can be moved in at least two directions of a direction parallel to the longitudinal direction of the support member 20 and a direction orthogonal to the longitudinal direction. In the following description, the direction orthogonal to the longitudinal direction of the support member 20 is defined as “X direction”, and the direction parallel to the longitudinal direction of the support member 20 is defined as “Y direction”. Further, a direction orthogonal to both the X direction and the Y direction is defined as "Z direction".

As described above, the plate member 30 is movable in at least the X direction and the Y direction on the support member 20, and the plate member 30 moved to an arbitrary position in the X direction and the Y direction is clamped. It can be fixed at the position by 35. That is, the position of the plate member 30 with respect to the first support member 21 and the second support member 22 can be adjusted.

The plate member 30 is provided with a rectangular opening 36 into which the reverse strut A can be inserted. The opening 36 in this embodiment in which the plate member 30 has the upper plate 33 and the lower plate 34 includes an upper opening provided in the upper plate 33 and a lower opening provided in the lower plate 34. Although not shown, unevenness for preventing slippage is formed on the surface of the upper plate 33 of the plate member 30.

Plural suspension plates 37 as locking portions are provided on both sides of the upper plate 33 in the longitudinal direction. Each hanging plate 37 is formed with a locking hole capable of locking a locking tool (hook, wire, shackle, etc.) for lifting all or part of the positioning jig 1 including the plate member 30.

<Guide member>
The guide member 40 shown in FIG. 1 is welded to the plate member 30, and extends from the peripheral edge of the opening 36 along the insertion direction (=Z direction) of the counter strut A. Further, the guide member 40 extends in the opening 36 perpendicularly to the opening surface. In the present embodiment, the two guide members 40 extend downward from the peripheral edge of the opening 36 toward the plate member 30.

The total length of each guide member 40 is shorter than the total length of the counter strut A and is longer than 1/2 of the total length of the counter strut A. The total length of the guide member 40 in this embodiment is about 6000 mm (=about 6 m). In addition, each of the guide members 40 has a substantially U-shaped cross-sectional shape and is arranged so as to face each other. As a result, the counter strut A that passes through the opening 36 and is lowered into the casing 10 (in the vertical hole) has one-half or more of its entire length surrounded by the two guide members 40 from four directions.

Here, the interval between the two guide members 40 is set so that a gap of several mm is formed between the counter strut A and the guide member 40 surrounding the counter strut A. From the viewpoint of positioning accuracy, it is preferable that such a gap does not exist or is as narrow as possible. On the other hand, if the gap does not exist at all or the gap is too narrow, the counter strut A and the guide member 40 interfere with each other, which may hinder the smooth insertion of the counter strut A. Therefore, in the present embodiment, for the purpose of realizing the smooth insertion of the counter strut strut A while ensuring the required positioning accuracy, a space of several mm is provided between the counter strut strut A and the guide member 40 surrounding the counter strut strut A. The interval between the guide members 40 facing each other is set so that a gap is created.

<Positioning procedure>
Next, an example of a procedure for positioning the reverse strut A using the positioning jig 1 according to the present embodiment will be described mainly with reference to FIGS. 3 to 6.

As shown in FIG. 3, the casing 10 is installed in the vertical hole H excavated by using an earth auger or the like. For example, the casing 10 is lifted by a crane or the like and lowered into the vertical hole H. Here, since the entire length of the casing 10 is longer than the depth of the vertical hole H, when the lower end of the casing 10 reaches the bottom of the vertical hole H, the upper end portion 10a of the casing 10 projects from the ground. For example, the upper part of the casing 10 projects from the ground G by about 50 cm. In other words, when the casing 10 is installed in the vertical hole H, a part of the casing 10 protruding from the ground G is the upper end portion 10a.

Next, as shown in FIG. 4, the support member 20 is arranged above the upper end portion 10a of the casing 10. Specifically, the first connecting member 51 and the second connecting member 52 are fixed to the pipe wall of the casing 10 along the circumferential direction thereof, and the supporting portions provided in the first connecting member 51 and the second connecting member 52. The support member 20 is mounted on 55. More specifically, the lower flange 23b of each support member 20 is placed on the contact portion 55a (FIG. 2) provided on the upper end of each coupling tool 50, and the contact portion 55a and the lower flange 23b are connected to each other. Are clamped by the clamp 57 (FIG. 1). Incidentally, in FIG. 4, the contact portion 55a and the clamp 57 are not shown.

Then, the protrusion length of the support part 55 provided in each connector 50 is adjusted, and the position (height) and inclination of the first support member 21 and the second support member 22 in the Z direction are adjusted. Usually, the heights of the first support member 21 and the second support member 22 are adjusted to the same height with respect to a reference plane (usually a horizontal plane). The inclinations of the first support member 21 and the second support member 22 are adjusted parallel to the reference plane. The principle that the height and the inclination of the support member 20 are changed according to the change in the protruding length of the support portion 55 is as described above.

Next, as shown in FIG. 5, the plate member 30 is placed on the support member 20. For example, the plate member 30 is lifted by a crane or the like and is lowered onto the upper flange 23a of the support member 20. When the plate member 30 is lifted by a crane or the like, the hanging plate 37 provided on the plate member 30 can be used. For example, a locking ring provided at one end of the wire is locked to a shackle locked in a locking hole provided in each suspension plate 37, and a locking provided at the other end of the wire. The plate member 30 can be lifted by hooking a hook of a crane on the ring.

Next, the plate member 30 placed on the support member 20 is moved in the X direction or the Y direction on the support member 20, and the plate member 30 is arranged at an arbitrary position and fixed to the support member 20. That is, the position of the plate member 30 with respect to the first support member 21 and the second support member 22 is adjusted to an arbitrary position and fixed at the position.

Through the steps up to this point, the height, position and inclination of the opening 36 provided in the plate member 30 are adjusted. That is, the opening 36 is provided in the plate member 30, and the plate member 30 is arranged on the support member 20 whose position (height) and inclination in the Z direction are adjusted in advance, and thereafter, in the X direction. The position in the Y direction is adjusted. Therefore, finally, the height, position and inclination of the opening 36 are adjusted to any height, position and inclination.

However, the support member 20 and the plate member 30 may be simultaneously installed above the upper end portion 10a of the casing 10. That is, the plate member 30 is aligned and fixed to the first support member 21 and the second support member 22 in advance, and then the plate member 30 is already fixed to the first support member 21 and the second support member 22. May be fixed to the upper end 10a of the casing 10.

Next, as shown in FIG. 6, the upright strut A is lifted by a crane or the like. For example, the reverse strut A is lifted by hooking a hook of a crane on the wire locked at the upper end of the strut A. Then, the lifted counter strut A is inserted into the opening 36 provided in the plate member 30, passed through the inside of the guide member 40, and lowered into the casing 10 along the guide member 40. Here, the position of the opening 36 in the X and Y directions and the height and inclination with respect to the XY plane have been adjusted. The guide member 40 extends perpendicularly to the opening surface of the opening 36. Therefore, if the counter strut A is inserted into the opening 36 and the counter strut A inserted into the opening 36 is passed through the inside of the guide member 40 and lowered into the casing 10 (vertical hole H), the position of the counter strut A concerned. And the tilt match or substantially match the position and tilt of the adjusted opening 36. That is, the reverse strut A is positioned. Furthermore, since the total length of the guide member 40 is longer than 1/2 of the total length of the counter strut A, the swing of the counter strut A during insertion is prevented or suppressed, and the counter strut A is positioned with higher accuracy. It

Next, concrete is poured into the bottom of the vertical hole H (bottom of the casing 10) to fix the lower part of the reverse strut A. As described above, concrete may be placed on the bottom of the vertical hole H before the reverse strut A is inserted. Then, the positioning jig 1 is removed, and the work of embedding the reverse strut A is completed. For example, the fixing between the casing 10 and the support member 20 is released, and the support member 20 and the plate member 30 are collectively lifted by a crane or the like and removed. At this time, the fixation between the casing 10 and the support member 20 can be released only by removing the clamp 57 (FIG. 1). Further, the fixing between the support member 20 and the plate member 30 can be released only by removing the clamp 35 (FIG. 1). After that, the casing 10 is removed from the vertical hole H using a jack or the like.

The above is an example of the procedure for positioning the reverse strut A using the positioning jig 1, and a part of the procedure can be appropriately performed according to the situation of the site. For example, in the above procedure, the protruding length of the support portion 55 is adjusted after the support member 20 is placed on the connector 50. However, the support member 20 may be placed on the connector 50 after adjusting the protruding length of the support portion 55. In this case, the plate member 30 may be previously fixed to the support member 20 placed on the connector 50. In the case of such a procedure, by moving the support member 20 in the X direction or the Y direction on the coupling tool 50, the openings 36 provided in the plate member 30 and the guide member 40 can be aligned in the same direction. Done.

Further, the components of the positioning jig 1 other than the casing 10 (the supporting member 20, the plate member 30, and the guide member 40) are integrated in advance, and the connecting member 50 is attached to the supporting member 20, and then these are mounted on the casing 10. You may fix it. In the case of such a procedure, after fixing the integrated support member 20, plate member 30, and guide member 40 to the casing 10, the protrusion length of the support portion 55 is adjusted or the clamp 35 is loosened as necessary. The position of the plate member 30 is adjusted.

As described above, the positioning jig 1 according to the present embodiment has a simple structure and can position the counter strut A with necessary and sufficient accuracy. Further, the positioning jig 1 according to the present embodiment can be easily assembled and installed in a short time, and can be easily disassembled and removed in a short time.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1... Reverse strut positioning jig (positioning jig), 10... Casing, 10a... Upper end part, 11... Upper end opening part, 20... Support member, 21... 1st support member, 22... 2nd support member, 23a... Flange ( Upper side flange), 23b... Flange (lower side flange), 24... Web, 30... Plate member, 31, 32... Vertical plate, 33... Upper plate, 34... Lower plate, 35... Clamp, 36... Opening part, 37... Hanging plate, 40... Guide member, 50... Connecting tool, 51... First connecting tool, 52... Second connecting tool, 53... Fixing part, 53a... Angle, 53b... Bolt, 54... Cylindrical part, 55... Supporting part, 55a... Abutting part, 56... Collar, 56a... Operation pin, 57... Clamp, A... Reverse strut, G... Ground

Claims (5)

A jig for positioning a reverse strut in a reverse striking method,
A casing that is formed in a tubular shape with both ends in the longitudinal direction opened, and is installed in a vertical hole into which the reverse strut is embedded,
A first support member and a second support member that are arranged above the upper end of the casing protruding from the ground and cross the upper end opening of the casing;
A plate member disposed on the first support member and the second support member, straddling the first support member and the second support member,
An opening provided in the plate member, into which the reverse strut can be inserted,
A guide member extending along the insertion direction of the counter strut from the peripheral edge of the opening,
It is possible to respectively adjust a vertical distance from two different positions in the longitudinal direction of the first support member to the upper end of the casing,
It is possible to adjust a vertical distance from two different positions in the longitudinal direction of the second support member to the upper end of the casing,
The position of the plate member with respect to the first support member and the second support member is adjustable,
The length of the guide member is shorter than the entire length of the counter strut, and longer than 1/2 of the total length of the counter strut.
Reverse strut positioning jig. The reverse strut positioning jig according to claim 1,
The two guide members extend from the peripheral edge of the opening along the insertion direction of the counter strut,
The reverse strut that has passed through the opening is surrounded by the two guide members from four directions.
Reverse strut positioning jig. The reverse strut positioning jig according to claim 1 or 2,
A pair of first connectors that respectively connect two different locations in the longitudinal direction of the first support member and the upper end of the casing;
A pair of second connecting members that respectively connect two different locations in the longitudinal direction of the second support member and the upper end portion of the casing,
Each of the first connector and the second connector is
A fixed portion fixed to the upper end portion of the casing,
A tubular portion connected to the fixed portion,
A support part that is inserted into the tubular part and has one end side protruding from the tubular part connected to the first support member or the second support member,
It is possible to change the protruding length of the support portion with respect to the tubular portion,
Reverse strut positioning jig. The reverse strut positioning jig according to any one of claims 1 to 3,
The plate member is movable in a direction parallel to the longitudinal direction of the first support member and the second support member, and in a direction orthogonal to the longitudinal direction of the first support member and the second support member. Is movable,
The plate member moved to an arbitrary position is fixed to the first support member and the second support member by a plurality of fixtures.
Reverse strut positioning jig. The reverse strut positioning jig according to any one of claims 1 to 4,
The plate member is provided with a locking portion capable of locking a locking tool for lifting all or a part of the reverse strut positioning jig.
Reverse strut positioning jig.

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