JP7254133B2 - Temporary fastening jig and temporary fastening method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary fastening jig for temporarily fastening a lower piece to an upper piece among pieces assembled together in the vertical direction, and a temporary fastening method for temporarily fastening pieces together in the vertical direction using the temporary fastening jig. .

Conventionally, liner plates (pieces) are known that are connected along the wall surface of the vertical shaft from top to bottom as the vertical shaft is dug down to form an earth retaining wall when constructing the vertical shaft. The outer edge of the piece is surrounded by flanges, and a plurality of holes are formed in the upper and lower flanges of the flanges.
An earth retaining wall made of pieces is installed, for example, by covering the inner wall surface of an excavated hole formed by shallowly digging the ground surface and installing a wall made of the uppermost piece. After that, the lower pieces are successively connected below the installed upper piece so as to cover the inner wall surface of the excavated hole while further digging the ground surface (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2002-295170

By the way, when connecting the lower piece to the upper piece from below, a chain, a jack, or the like may be attached to the lower piece, and the lower piece may be lifted by the jack. The upper flange of the suspended lower piece is brought into contact with the lower flange of the upper piece so that the holes formed in the flanges are aligned with each other. The upper and lower pieces are connected together by inserting bolts through aligned holes in the upper and lower flanges and fastening nuts to the bolts.
However, conventional connecting methods require chains, jacks, or the like to lift the lower piece. In addition, it is necessary to attach a chain to each piece, and to suspend the pieces to which the chains are attached one by one using a jack, which imposes a heavy workload. Furthermore, this work required a plurality of workers.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a temporary fastening jig and a temporary fastening method for facilitating connection of a lower piece to an upper piece.

In order to solve the above-mentioned problems, the present invention provides a temporary fastening jig for temporarily fastening a lower piece to an upper piece among pieces assembled together in the vertical direction, wherein flanges of the pieces contacting each other are provided with The main body portion is inserted through the hole, and the head portion is connected to the main body portion and abuts on the flange of the upper piece. It is characterized by comprising an engaging member that protrudes outward from the hole, and an adjusting portion that adjusts the distance between the head and the engaging member.

Further, the adjusting portion includes a shaft portion of the head having a first thread formed on an outer peripheral surface thereof, and a second thread receiving the shaft portion and engaging the first thread on an inner peripheral surface thereof. It is preferable to have an accommodating portion of the main body portion in which is formed.

In addition, the adjustment part has a cylindrical head having a first screw thread formed on an inner peripheral surface thereof, and an outer peripheral surface having a second screw thread with which the first screw thread is engaged. It is preferable to have the said main-body part which has.

Moreover, it is preferable that the main body portion includes a biasing mechanism that engages with the engaging member and biases the engaging member so as to protrude from the inside of the main body portion toward the outside.

Moreover, it is preferable to provide a pressing member that contacts the engaging member at one end and retracts the engaging member.

A rotary operating portion for operating the engagement member to move forward and backward; one end of which is connected to the operating portion; It is preferable to have a connecting portion that converts the forward and backward movement.

Furthermore, in order to solve the above problems, the present invention provides a temporary fastening method for temporarily fastening the lower piece to the upper piece using a temporary fastening jig, wherein the lower piece is brought closer to the upper piece. aligning the holes formed in the respective flanges with each other; and inserting the temporary fastening jig through the aligned holes to engage the engaging member with the flange of the lower piece. and a step.

Further, in a state in which the engaging member is engaged with the flange of the lower piece, the upper piece and the lower piece are brought into contact with each other, and the adjustment section is adjusted to adjust the head and the engaging member. It is preferable to include a step of pinching the flange between the head and the engaging member by narrowing the distance between the flange and the engaging member.

The invention facilitates the connection of the lower piece to the upper piece.

It is a figure which shows the state which temporarily fastened the lower piece to the upper piece. It is a figure for demonstrating the structure of the temporary fastening jig|tool which concerns on 1st Embodiment. FIG. 4 is a diagram for explaining a method of temporarily fastening the lower piece to the upper piece using the temporary fastening jig shown in FIG. 2 ; It is the elements on larger scale for demonstrating the process of a temporary fastening method. It is a figure for demonstrating the structure of the temporary fastening jig|tool which concerns on 2nd Embodiment. It is a figure for demonstrating the structure of the temporary fastening jig|tool which concerns on 3rd Embodiment.

Preferred embodiments of the present invention will be described with reference to the drawings. It should be noted that the embodiment shown below is an example, and various embodiments can be made within the scope of the present invention.
<First Embodiment>
FIG. 1 is a diagram showing a state in which the lower piece is temporarily fastened to the upper piece. 2A and 2B are diagrams for explaining the configuration of the temporary fastening jig according to the first embodiment, and FIG. 2A is a partially perspective view of the temporary fastening jig as seen from the peripheral surface side. 2(b) is a plan view of the main body of the temporary fastening jig, FIG. 2(c) is a partially perspective view of the main body as seen from the peripheral surface side, and FIG. It is a side view of the head of a temporary fixing jig.

As shown in FIG. 1 , the temporary fastening jig 100 is used to attach liner plates (pieces) that constitute an earth retaining wall body along the inner wall surface of a vertical shaft when the vertical shaft is excavated, for example, in the axial direction of the vertical shaft. Temporary tacking for connecting. The earth retaining wall is formed by connecting the upper liner plate (upper piece) P1 and the lower liner plate (lower piece) P2 from below while excavating the shaft from top to bottom. It will be built using the reverse winding method.
For convenience of explanation, the configuration of the upper piece P1 and the lower piece P2 temporarily fastened by the temporary fastening jig 100 will be described first. Since the upper piece P1 and the lower piece P2 have the same configuration, they will be described together.
As shown in FIG. 1, the upper piece P1 and the lower piece P2 are provided along the inner surface of the pit, respectively. It has upright flanges P12, P13; P22, P23.

The plates P11 and P21 are rectangular in plan view. For example, the plates P11 and P21 are formed by curving a steel plate into a wavy shape along its lateral direction and arcuately curving it along its longitudinal direction. be. Moreover, the plates P11 and P21 are not limited to those formed by bending in a wave shape or an arc shape, and may be formed in a flat plate shape.
The flanges P12 and P22 are provided on the two longitudinal edges of the plates P11 and P21, and are erected with respect to the plates P11 and P21 (hereinafter also referred to as "longitudinal flanges"). The longitudinal flange P12 of the upper piece P1 and the longitudinal flange P22 of the lower piece P2 are each passed through bolts that connect the upper and lower pieces P1 and P2 adjacent to each other in the axial direction (height direction) of the shaft. A plurality of holes P12a, P22a are formed along the extending direction of the longitudinal flanges P12, P22.
The flanges P13 and P23 are provided on the two edges on the short side of the plates P11 and P21, and are erected with respect to the plates P11 and P21 (hereinafter also referred to as "short flanges"). Each of the short flanges P13 and P23 has a plurality of holes P13a and P23a through which bolts connecting the upper piece P1 and the lower piece P2 that are adjacent in the circumferential direction are inserted. It is formed along the existing direction.

[Configuration of temporary fastening jig]
The temporary fastening jig 100 is made of steel, and as shown in FIG. The body portion 1 inserted through the holes P12a and P22a, the head portion 4 connected to the body portion 1 and in contact with the inner surface of the flange P12 of the upper piece P1, and the distance d between the body portion 1 and the head portion 4 are and a rotary adjuster 6 for adjustment.

(main body)
As shown in FIGS. 2(a) to 2(c), the main body 1 is made of steel and has a substantially cylindrical shape. The tip side of the main body 1 in the insertion direction I into the holes P12a and P22a of the longitudinal flanges P12 and P22 of the upper and lower pieces P1 and P2, respectively, has an inclined portion 1a inclined toward the center of the main body 1. As shown in FIG.
The body portion 1 is inserted through the holes P12a, P22a in the longitudinal flanges P12, P22 of the upper and lower pieces P1, P2, respectively. The body portion 1 includes a housing portion 11 formed along the axis x in its central portion, and an engaging member 13 that can move back and forth with respect to the outer peripheral surface 1b.
The accommodation portion 11 accommodates a shaft portion 43 of the head portion 4, which will be described later. A screw thread (for example, a female screw thread) 11 a is formed on the inner peripheral surface of the accommodating portion 11 .

The engaging members 13 are formed of steel plates and are provided on the outer peripheral surface of the main body 1 at regular intervals. In the illustrated embodiment, four engaging members 13 are provided, but the number and spacing of the engaging members 13 can be set arbitrarily.
The engaging member 13 protrudes from the outer peripheral surface 1b of the main body 1 so as to extend obliquely outward from the side of the inclined portion 1a of the main body 1 in the direction opposite to the insertion direction I. As shown in FIG. The engaging member 13 has a flat surface 13b extending perpendicularly to the outer peripheral surface 1b of the main body 1 and facing the head portion 4 continuously from the obliquely projecting portion 13a. The flat surface 13b contacts the inner surface of the upper longitudinal flange P22 of the lower piece P2.
The engaging member 13 is housed in an opening (not shown) formed in the outer peripheral surface 1b of the main body 1 so as to be able to advance and retreat. The engaging member 13 is rotatably supported at its one end on the inclined portion 1a side inside the body portion 1, for example. The engaging member 13 is urged by an urging means such as a spring provided inside the main body 1, and protrudes from the outer peripheral surface 1b of the main body 1 around the pivotally supported point. The engaging member 13 protrudes (protrudes) outward from the outer peripheral surface 1b of the main body 1 when no external force is applied (natural state), and when an external force is applied (loaded state). is partially retracted (retracted) into the main body 1 .
It should be noted that the biasing means of the engaging member 13 is not limited to springs, and known biasing means can be used.

(head)
As shown in FIG. 2D , the head 4 includes a contact portion 41 and a shaft portion 43 integrally formed with the contact portion 41 .
The abutment portion 41 has an abutment surface 41a facing the main body portion 1 and integrally formed with the shaft portion 43 . The contact surface 41a is the inner surface of the lower longitudinal flange P12 of the upper piece P1 when the temporary fastening jig 100 is inserted into the holes P12a and P22a of the longitudinal flanges P12 and P22 of the upper and lower pieces P1 and P2. abut. In addition, the contact surface 41 a is substantially parallel to the flat surface 13 b of the engaging member 13 .
The shaft portion 43 has an outer diameter smaller than the outer diameter of the contact portion 41 and is housed in the housing portion 11 of the body portion 1 . A thread (for example, a male thread) 43 a is formed on the outer peripheral surface of the shaft portion 43 . The male thread 43a of the shaft portion 43 is screwed into the female thread 11a of the housing portion 11 of the body portion 1, so that the body portion 1 and the head portion 4 are connected to each other.

(Regulator)
The adjustment portion 6 adjusts the distance between the body portion 1 and the head portion 4, specifically, the flat surface 13b of the engaging member 13 of the body portion 1 and the contact surface 41a of the contact portion 41 of the head portion 4. Adjust the distance d between The adjusting portion 6 has a shaft portion 43 of the head portion 4 formed with a male thread 43a, and a female thread 11a that accommodates the shaft portion 43 and engages with the male thread 43a. and an accommodating portion 11 of the main body portion 1 . More specifically, the adjusting portion 6 is configured by a female thread 11 a on the housing portion 11 of the body portion 1 and a male thread 43 a on the shaft portion 43 of the head portion 4 .
The adjuster 6 rotates the head 4 in one direction about the axis x so that the shaft 43 of the head 4 enters or advances into or out of the housing 11 of the main body 1, thereby closing the gap d. It can be narrowed or widened.

[Temporary fastening method]
Next, a method of temporarily fastening the lower piece P2 to the upper piece P1 by the temporary fastening jig 100 will be described with reference to FIGS.
FIG. 3 is a diagram for explaining a method of temporarily fastening the lower piece to the upper piece using a temporary fastening jig. FIG. 4 is an enlarged view for explaining the process of temporarily fastening the lower piece to the upper piece using a temporary fastening jig, and FIG. Fig. 4(b) is a diagram showing a temporary fastening jig in the middle of insertion; Fig. 4(c) is a diagram showing the temporary fastening jig after insertion; (d) is a diagram showing the temporary fastening jig in a state in which the adjusting portion is adjusted.
As shown in FIG. 3, the upper piece P1 and the lower piece P2 are arranged in a so-called zigzag manner so that the positions of the short flanges P13 and P23 are shifted.

First, as shown in FIG. 3, the operator lifts the lower piece P2 and brings it closer to the upper piece P2 (indicated by arrow F). Next, as shown in FIG. 4A, the upper longitudinal flange P22 of the lower piece P2 is brought into contact with the lower longitudinal flange P12 of the upper piece P1, so that the lower longitudinal flange P12 of the upper piece P1 contacts the lower longitudinal flange P12 of the upper piece P1. The hole P12a is aligned with the hole P22a of the upper longitudinal flange P22 of the lower piece P2. In this state, the temporary fastening jig 100 is inserted through two holes P12a and P22a formed near the side ends of the lower piece P2 in the circumferential direction.
Since it is inserted from the inclined portion 1a on the distal end side in the insertion direction I of the main body 1 and the obliquely projecting portion 13a side of the engaging member 13, it is a temporary fixing jig to the holes P12a and P22a of the longitudinal flanges P12 and P22. The insertion of the body portion 1 of 100 is facilitated.
In addition, the temporary fastening jig 100 rotates the adjusting portion 6 when it is inserted so that the distance d between the engaging member 13 of the body portion 1 and the head portion 4 is larger than the plate thickness of at least two longitudinal flanges P12 and P22. It is preferable to keep it large enough.

As shown in FIG. 4B, when the body portion 1 is inserted through the holes P12a and P22a, the engaging member 13 contacts the inner peripheral walls of the holes P12a and P22a and is biased inside the body portion 1. Pushed (retracted) against the biasing force of the means. As shown in FIG. 4(c), when the body portion 1 passes through the holes P12a and P22a, the engaging member 13 is biased from the inside of the body portion 1 toward the outside, so that the engaging member 13 is pushed from the periphery of the holes P12a and P22a. also protrude outwards.
When the flat surface 13b of the engaging member 13 of the temporary fastening jig 100 is in contact with the inner surface of the longitudinal flange P22 of the lower piece P2, even if the operator releases the lower piece P2, the lower piece P2 is , is temporarily fixed to the upper piece P1 to maintain the suspended state. That is, the lower piece P2 does not drop from the upper piece P1. As described above, the temporary fastening of the upper piece P1 and the lower piece P2 by the temporary fastening jig 100 is completed.

There is a space S between the lower piece P2 and the upper piece P1 when the lower piece P2 is temporarily fastened. The worker further slightly lifts the lower piece P2 to bring the longitudinal flange P22 and the longitudinal flange P12 of the upper piece P1 into contact, and as shown in FIG. The contact portion 41 is rotated. By rotating the contact portion 41 , the shaft portion 43 of the head portion 4 constituting the adjustment portion 6 is caused to enter the accommodation portion 11 of the main body portion 1 .
As a result, the distance d between the contact surface 41a of the contact portion 41 and the flat surface 13b of the engaging member 13 is narrowed to substantially match the thickness of the longitudinal flanges P12 and P22. That is, in the temporary fixing step, the longitudinal flange P22 of the lower piece P2 may be brought into close contact with the longitudinal flange P12 of the upper piece P1.
The temporary fastening jig 100 makes it possible to temporarily fasten the lower piece P2 to the upper piece P1 simply and quickly without using a chain, a jack, or the like, which has conventionally been required.

After the upper and lower pieces P1 and P2 are temporarily fastened by the temporary fastening jig 100, the bolts B are inserted through all the holes P12a and P22a of the longitudinal flanges P12 and P22 through which the temporary fastening jig 100 is not inserted, and are tightened by the nuts N. be concluded. The longitudinal flange P12 of the upper piece P1 and the longitudinal flange P22 of the lower piece P2 can be brought into close contact with each other by the adjusting section 6 and can be temporarily fixed. become easier.
By adjusting the adjusting portion 6, that is, by turning the head portion 4, the shaft portion 43 is advanced from the accommodating portion 11, and the engaging member 13 is pushed into the main body portion 1 to engage with the lower piece P2. By releasing , the temporary fastening jig 100 can be easily pulled out. The bolts B are inserted through the holes P12a and P22a after the temporary fastening jig 100 is pulled out, and the nuts N are fastened to the bolts B. As shown in FIG. This completes the connection of the lower piece P2 to the upper piece P1.

[others]
The temporary fastening jig 100 having the adjustment portion 6 can freely change the distance d between the contact surface 41a of the contact portion 41 and the flat surface 13b of the engaging member 13. , even if reinforcing steel (not shown) must be installed between the upper piece P1 and the lower piece P2, it can be flexibly dealt with.
Moreover, if the temporary fastening jig 100 has the same strength as the bolt B and the nut N that fasten the upper piece P1 and the lower piece P2 together, the temporary fastening jig 100 has two functions of temporary fastening and fastening. can also be responsible for

Further, when the temporary fastening jig 100 is inserted through the upper piece P1 and the lower piece P2, the distance between the longitudinal flange P12 of the upper piece P1 and the longitudinal flange P22 of the lower piece P2 is If the distance d between the contact surface 41a of the contact portion 41a and the flat surface 13b of the engaging member 13 is smaller than the distance d, the longitudinal flanges P12 and P22 need not be brought into contact.
Also, the temporary fastening jig 100 is inserted in advance through the hole P12a of the lower longitudinal flange P12 of the upper piece P1, and the lower piece P2 is lifted from below to lift the hole P22a of the upper longitudinal flange P22 of the lower piece P2. The lower piece P2 may be temporarily fastened to the upper piece P1 by inserting the temporary fastening jig 100 into the upper piece P1. In this case, the head 4 of the temporary fastening jig 100 may be held down from above.

<Second Embodiment>
Next, a temporary fastening jig 200 according to a second embodiment will be described with reference to FIG. In particular, the configuration of a temporary fastening jig 200 different from the temporary fastening jig 100 according to the first embodiment will be described. 5A and 5B are diagrams for explaining a temporary fastening jig according to the second embodiment, and FIG. 5A is a diagram showing a state in which an engaging member protrudes from the outer peripheral surface of the main body. and FIG. 5(b) is a diagram showing a state in which the engaging member is retracted inside the main body.

As shown in FIG. 5 , the temporary fastening jig 200 includes a body portion 210 , a head portion 240 and an adjusting portion 260 .
The body portion 210 has a screw thread (for example, a male screw thread) 211 formed on the outer peripheral surface opposite to the inclined portion 210a. The main body portion 210 has an accommodation portion 212 that accommodates a portion of the knock mechanism, which will be described later. The engaging member 213 of the body portion 210 includes a diagonally projecting portion 213a and a flat surface 213b. In the temporary fastening jig 200, the engagement member 213 is advanced and retracted with respect to the body portion 210 by a known knock mechanism.

For example, the knock mechanism includes a pressing member 270 that can be moved in and out of the end portion of the body portion 210 opposite to the inclined portion 210a, and a compression coil spring that biases the pressing member 270 outward with respect to the body portion 210. 280 , and a locking protrusion 290 that is provided on the bottom inside the main body 210 and locks the pressing member 270 .
The pressing member 270 includes a pressing button 271 exposed from the body portion 210, a shaft portion 272 attached to the pressing button 271, and a shaft portion 271 integrally formed on the opposite side of the pressing button 271. and a contact portion 273 in contact with the joining member 213 .
The compression coil spring 280 is fitted over the outer periphery of the shaft portion 272 of the pressing member 270 and is housed in the housing portion 212 of the body portion 210 . The compression coil spring 280 is supported between the surface of the pressing button 271 facing the housing portion 212 of the body portion 210 and the bottom surface of the housing portion 212 .

As shown in FIG. 5A, when the push button 271 is not pushed, the compression coil spring 280 pushes up the push member 270, and the engaging member 213 protrudes from the outer peripheral surface of the body portion 210. ing.
As shown in FIG. 5B, when the push button 271 is pressed, the contact portion 273 pulls the engaging member 213 into the body portion 210 as the shaft portion 272 moves along the axis x. The pressing member 270 is locked by engaging with the stop projection 290 . By pressing the push button 271 again, the engagement between the contact portion 273 and the locking projection 290 is released, and the compression coil spring 280 pushes up the push member 270 . As a result, the engaging member 213 protrudes outside the body portion 210 again.

The head portion 240 is formed, for example, as a hollow cylindrical member, and has a contact surface 240a on the side facing the tip of the body portion 210 . A thread (for example, a female thread) 241 is formed on the inner peripheral surface of the hollow portion of the head 240 . That is, in the temporary fastening jig 200 , the adjustment portion 260 is configured by the male thread 211 of the body portion 210 and the female thread 241 of the head portion 240 .
When the lower piece P2 is temporarily fastened to the upper piece P1, the temporary fastening jig 200 has at least the same effect as the temporary fastening jig 100, and the provisional fastening can be easily released due to the presence of the knock mechanism. can.
Although two engaging members 213 are provided in the illustrated embodiment, the number of engaging members 213 and the spacing between them can be set arbitrarily.

<Third Embodiment>
Next, a temporary fastening jig 300 according to a third embodiment will be described with reference to FIG. In particular, the configuration of a temporary fastening jig 300 different from the temporary fastening jig 100 according to the first embodiment will be described. FIG. 6 is a perspective view for explaining a temporary fastening jig according to the third embodiment.
As shown in FIG. 6, the temporary fastening jig 300 includes a body portion 310, a head portion 340, and an adjusting portion.

The body portion 310 has a screw thread (for example, a male screw thread) 311 formed on the outer peripheral surface of the end portion opposite to the inclined portion 310a. The engaging member 313 of the body portion 310 includes a diagonally projecting portion 313a and a flat surface 313b. In the temporary fastening jig 300, the engaging member 313 moves forward and backward with respect to the main body portion 310 by a so-called thumb-turn mechanism.
For example, the thumb-turn mechanism includes a rotary operation portion 314 on the head portion 340 and a connection portion (not shown) having one end connected to the operation portion 314 and the other end connected to the engagement member 313 in the body portion 310. ).
For example, when the operating portion 314 is rotated in the direction of arrow R, the rotational motion of the operating portion 314 is transmitted to the engaging member 313 via the connecting portion, and the engaging member 313 is pulled into the body portion 310. . In other words, the connecting portion converts the rotational motion of the operating portion into forward and backward motion of the engaging member 313 . From this state, when the operating portion 314 is rotated in the opposite direction, the engaging member 313 protrudes outward from the body portion 310 . In other words, unless the operation portion 314 is operated, the engagement member 313 is not moved back and forth.

The head portion 340 is formed, for example, as a hollow cylindrical member, and has a contact surface 340a on the side facing the tip of the body portion 310 . A thread (for example, a female thread (not shown)) is formed on the inner peripheral surface of the hollow portion of the head 340 . That is, in the temporary fastening jig 300 , the adjustment portion is configured by the male thread 311 of the body portion 310 and the female thread of the head portion 340 .
When the lower piece P2 is temporarily fastened to the upper piece P1, the temporary fastening jig 300 has at least the same effect as the temporary fastening jig 100, and the provisional fastening can be easily released due to the presence of the thumb-turn mechanism. can.
Although two engaging members 313 are provided in the illustrated embodiment, the number of engaging members 313 and the spacing between them can be set arbitrarily.

1 Body Part 11 Accommodating Part 11a Female Thread (Second Thread)
13 engaging member 4 head 41 contact portion 43 shaft portion 43a male thread (first thread)
6 Adjusting parts 100, 200, 300 Temporary fastening jig 270 Pressing member 314 Operating part d Spacing P1 Upper piece P2 Lower piece P12, P22 Longitudinal flange P12a, P22a Hole

Claims (4)

A temporary fastening jig for temporarily fastening liner plates that are assembled together in the vertical direction,
a head having a portion formed larger than a hole formed in a flange provided around the periphery of the liner plates that are in contact with each other;
a main body provided on the head and inserted through the hole;
with
The body portion has an engaging member that can be inserted into the hole and engages with the flange, and is inserted through the hole to hold the positions of the liner plates that are in contact with each other in the vertical direction. A temporary fastening jig characterized by: 2. The tacking according to claim 1 , wherein said engaging member engages a flange of a liner plate on the side opposite to the flange of said liner plate facing said head. jig. 3. The apparatus according to claim 2, wherein the engaging member is movable forward and backward with respect to the outer peripheral surface of the main body portion, and engages a flange of the other liner plate when the main body portion advances from the hole. Temporary fastening jig as described. A temporary fastening method for liner plates, comprising holding liner plates that are in contact with each other in the vertical direction by using the temporary fastening jig according to any one of claims 1 to 3.

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