JPH11336078A - Coupling device for shore strut support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling device for a shore strut support, by which assembly and disassembly works can be conducted easily. SOLUTION: In the coupling device 50 for the shore strut support in a cut and cover tunneling method, etc., a locking section 25b, which is projected to the outside of a shaft section 25a and in which the center of an end face is retreated towards both sides in high height, is formed to a connector 25 installed to the shore strut support 20, the metal fitting 43 of an earth retaining panel 41 is inserted to the connector 25, and the locking section 25b is brought into press-contact with the metal fitting 43 by turning the connector 25, and the shore strut support 20 is coupled with the earth retaining panel 41. The metal fitting 43 of the earth retaining panel 41 is composed of an inserting hole, into which the connector 25 is inserted, a circular guide section, to which the outer circumferential section of the connector 25 is fitted, a temporary fixing section, which is formed in the circumferential direction while being continued to the inserting hole and to which the locking section 25b of the rotated connector 25 is abutted, and a clamping section, which is formed in the circumferential direction while being continued to the temporary fixing section and has thickness larger than the temporary fixing section and to which the locking section 25b is abutted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device for a girder support for connecting two earth retaining panels at predetermined intervals by connecting the earth retaining panels by a cut beam support in an open-cutting method or the like.

[0002]

2. Description of the Related Art In a digging method or the like, as shown in FIG. 11, two earth retaining panels 1 are connected by a cutting beam support 2, and the earth retaining panels 1, 1 held at a predetermined interval are placed on an excavation site. Has been installed.

[0003] The cutting beam support 2 is composed of an outer pipe 3 and an inner pipe 4 fitted to the outer pipe 3, and a flange 5 is welded to each end thereof, and the flange 5, the retaining panel 1, A cushioning member 6 is interposed therebetween. These pipes 3, 4 are configured to be movable with respect to each other, thereby adjusting the length of the girder support 2. Further, one end (not shown) of a connector 7 is connected to the outer pipe 3 and the inner pipe 4, respectively, and the other end thereof penetrates the flange 5 and the buffer member 6 and protrudes outward.

As shown in FIGS. 12 (a) and 12 (b), a rectangular locking portion 7b is bulged out of a shaft portion 7a to form a T-shape as a whole. The surface on the buffer member 6 side is formed in an arc shape. The retaining panel 1 has a plurality of U-shaped attachments 12 attached to a vertical beam 11, and a rectangular hole 13 is formed in the attachment 12.

Then, the retaining panel 1 is connected to the cutting beam support 2.
In the case of the connection by means of, the two retaining panels 1 and 1 are held at a predetermined interval, and as shown in FIGS. Into the hole 13. Then, the connecting member 7 and the pipes 3 and 4 are rotated by 90 degrees, and a wedge is further driven into the pipes 3 and 4, so that the locking portions 7 are formed as shown in FIGS.
b compresses the cushioning member 6 and moves onto the fixture 12, and the two are connected. This operation is performed on both sides of the girder support 2, and the two earth retaining panels 1, 1 are held at predetermined intervals.

When the connecting member 7 is inserted into the position shown in FIG. 12A, the connecting member 7
Due to its own weight, it falls down to the lower end of the hole 13, and then, by driving in a wedge, the shaft portion 7 a comes into close contact with the end surface of the hole 13 so that the gap between the cutting beam support 2 and the retaining panel 1 is prevented. It has become.

When the beam support 2 is to be detached from the retaining panel 1, the connecting member 7 and the pipes 3 and 4 must be connected to each other by 90 degrees.
13A, the direction of the locking portion 7b is aligned with the hole 13, and the shaft portion 7a of the connecting tool 7 is further raised to a position shown by a chain line in FIG. The center position is matched {return to the position shown in FIG. 12 (a)}. Thereafter, the girder support 2 is pulled out of the retaining panel 1.

[0008]

The above-mentioned assembling and disassembling operations are performed by an operator while supporting the girder support 2. By the way, since the girder support 2 is heavy,
It is not only a difficult task for the operator to support the girder support 2, but also there is a problem that the number of man-hours increases because the position of the connecting tool 7 is adjusted while supporting the girder support 2.

Further, when one of the cut beam supports 2 is fixed to the earth retaining panel 1, the cushioning member 6 is compressed, so that the relative position of the tip on the opposite side of the cut beam support 2 is fixed. Therefore, it is difficult to adjust the position of the opposite end, and thus there is a problem that the number of work steps for connecting to the retaining panel 1 is further increased.

In the disassembling operation, the shaft 7a is moved to the position shown in FIG.
(A) must be raised to the position shown by the dashed line, but since the locking portion 7b of the connecting tool 7 is inside the hole 13 of the mounting tool 12 and cannot be seen from the outside, it takes time to adjust the position. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a connecting device for a girder support capable of easily assembling and disassembling operations.

[0012]

According to the first aspect of the present invention, there is provided a connecting device 50 of a girder support for supporting a pressure of a retaining panel in an open-cutting method or the like, by attaching reference numerals used in the embodiments. A connecting part 25 attached to the cutting beam support 20 is provided with a locking part 25b which protrudes outside the shaft part 25a and has a high center of the end face and retreats to both sides. 41 is inserted into the mounting member 43 and the connecting member 25 is rotated so that the locking portion 25
In the connecting device 50 for connecting the cutting beam support 20 to the retaining panel 41 by pressing the b to the mounting tool 43, the mounting tool 43 of the retaining panel 41 is inserted into the insertion hole 44 into which the connecting tool 25 is inserted. Guide portion 45 into which the outer peripheral portion of the connecting member 25 is fitted, and a temporary fixing portion which is formed in the circumferential direction continuously with the insertion hole 44 and in which the engaging portion 25b of the rotated connecting member 25 abuts. A part 46 and a fastening part 47 formed in the circumferential direction to be continuous with the temporary fixing part 46 and having a larger thickness than the temporary fixing part 46 and to which the locking part 25b is pressed. It has features.

The fastening portion of the invention according to the second aspect is characterized in that a groove portion 48 is formed at the center for locking the tip of the locking portion 25b.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the open-cutting method or the like, as shown in FIG. 3, two earth retaining panels 41 and the girder support 20 are connected by a connecting device 50 described below.
Earth retaining panels 41, 41 held at predetermined intervals are installed at the excavation site.

1 and 2, the cutting beam support 20 comprises an outer pipe 21 and an inner pipe 22 fitted to the outer pipe 21 and movable in the axial direction. A rotating fitting 23 is attached to an end of the outer pipe 21, and a buffer member 24 is attached to a side surface of the rotating fitting 23.

As shown in FIG. 4, the connecting member 25 is composed of a shaft portion 25a and a rectangular locking portion 25b protruding outward on both ends at one end of the shaft portion 25a, and has a T-shape as a whole. ing. The other end of the shaft portion 25a (not shown) penetrates the cushioning member 24 and is fixed to the rotating bracket 23.
The side surface of the locking portion 25b on the buffer member 24 side has a mountain shape having a high center and retreating toward both sides.

The inner pipe 22 is also connected to the outer pipe 2.
The rotating bracket 23, the cushioning member 24, and the connecting tool 25 are attached to the end opposite to 1.

At the end of the outer pipe 21, a rotating fitting 23 is provided.
, A base 26 is mounted, and a pair of bevel gears 27 is mounted inside the base 26. The handle-side gear 28 constituting the bevel gear 27 is rotated by a handle 29 inserted into the outer pipe 21, and the screw-side gear 30 driven by the handle-side gear 28 is rotatably supported on the base 26. Is fixed to the rotating shaft 31.

A screw 32 is formed on the rotating shaft 31, and a nut 33 screwed to the screw 32 is attached to the inner pipe 22. When the handle 29 is rotated, the handle-side gear 28 and the screw-side gear 30 are rotated, and the inner pipe 22 is moved right and left via a nut 33 screwed into the screw 32, whereby the cutting beam support 20 is The length can be adjusted. The base 26 and the nut 33
And a thrust bearing 34 is interposed between them.

In FIG. 5, a vertical beam 42 is attached to both sides of the earth retaining panel 41, and a plurality of attachments 43 are attached to each of them.

Next, with reference to FIGS.
Will be described. The insertion hole 44 has a shape corresponding to the locking portion 25b of the connecting tool 25, and a circular guide portion 45 is provided so as to surround the insertion hole 44. On the inner side of the guide portion 45, a thin temporary fixing portion 46 is formed continuously in the circumferential direction to the insertion hole 44, and a thick tightening portion is provided at an intermediate position therebetween so as to be sandwiched by the temporary fixing portion 46. 47 are formed. A groove 48 is formed at the center of the fastening portion 47. An inclined surface is formed on a side surface of the fastening portion 47. The connection device 50 is constituted by the connection tool 25 attached to the cutting beam support 20 and the attachment tool 43 attached to the earth retaining panel 41.

Next, the procedure for connecting the cutting beam support 20 to the earth retaining panel 41 by the connecting device 50 will be described with reference to FIGS.
This will be described with reference to FIG.

(1) The two retaining panels 41 are held at a predetermined interval. For example, two cutting beam supports 20 are connected to both sides of the earth retaining panel 41, respectively. For each of the beam supports 20, the handle 29 is rotated to adjust the length to the interval between the retaining panels 41, 41.

(2) The orientation of the connecting member 25 of the cutting beam support 20 is aligned with the insertion hole 44 of the attachment 43 of the earth retaining panel 41, and the locking portion 25b is inserted into the insertion hole 44 {FIG.
See (a). The outer peripheral portion of the locking portion 25b is fitted to the inner surface of the guide portion 45 (see FIG. 8B).

(3) Holding the rotating bracket 23, the locking portion 25
When the b and the outer pipe 21 or the inner pipe 22 are rotated by about 30 degrees (see FIG. 9A), the locking portion 25b moves onto the temporary fixing portion 46, and the cut beam support 20 is attached to the earth retaining panel 41. Temporarily fixed (see FIG. 9B).

In this case, the thickness of the temporary fixing portion 46 is small, and the cushioning member 24 is not so strongly compressed.
The opposite end of the girder support 20 moves to some extent freely, and its position is easily changed.

(4) Next, the steps (2) and (3) described above are repeated for the connecting member 25 on the opposite side, and the retaining panel 41 is temporarily fixed by the cutting beam support 20. These steps are performed for each end of all the beam supports 20, and both ends of all the beam supports 20 are temporarily fixed.

(5) Then, holding the rotating fitting 23 at each end of the cutting beam support 20, and further rotating the locking portion 25b and the outer pipe 21 or the inner pipe 22 by about 60 degrees {FIG. 10 (a) Referring to FIG. 10, the locking portion 25b rides on the fastening portion 47 along the inclined surface, and the tip thereof is locked in the groove portion 48 (see FIGS. 10B and 10C). Since the fastening portion 47 is thicker than the temporary fastening portion 46, the buffer member 24
Is strongly compressed, and the girder support 20 is
1 is securely fixed.

Since the other end of the beam support 20 is already temporarily fixed to the earth retaining panel 41, it does not move. Further, since the outer peripheral portion of the locking portion 25b is fitted and closely attached to the inner surface of the guide portion 45, even if there is a gap between the shaft portion 25a and the insertion hole 44, the cut beam support 20 can be used as the retaining panel. There is no deviation from 41.

(7) Connect the beam support 20 to the retaining panel 4
When detaching from the bracket 1, if the user holds the rotating bracket 23 and rotates it 90 degrees in the direction opposite to the above, the direction of the locking portion 25 b matches the insertion hole 44. Further, since the locking portion 25b is fitted to the guide portion 45, the center of the locking portion 25b is
It matches the center of the insertion hole 44. Then, by pulling out the girder support 20, the girder support 20 can be removed from the retaining panel 41.

According to the above embodiment, the following effects can be obtained.

(A) Since the guide portion 45 is provided on the mounting member 43 to guide the outer peripheral portion of the locking portion 25b, the operation of turning the connecting member 25 can be easily performed.

(B) Since the thin temporary fixing portion 46 is formed on the mounting member 43, when one end is temporarily fixed, the opposite end of the cutting beam support 20 moves to some extent freely, so that the position is adjusted. The two earth retaining panels 41 can be easily connected.

(C) Since the locking portion 25b is guided by the guide portion 45, the center of the connecting member 25 always coincides with the insertion hole 44. If the rotating metal member 23 is rotated 90 degrees, the cutting beam support is immediately performed. 20 can be removed and the girder support 2
0 can be removed very easily.

(D) Retaining panel 4 of cutting beam support 20
In order not to cause the displacement with respect to 1, since the connecting tool does not fall into the insertion hole unlike the related art, the connecting and disassembling work is further facilitated.

(E) Since the tip of the locking portion 25b is locked in the groove 48 at the time of tightening, the connecting member 25 does not shift in the circumferential direction.

[0037]

According to the first aspect of the present invention, there is provided a connecting device for a girder support for supporting the pressure of an earth retaining panel in an open-cutting method or the like, wherein a connecting member attached to the girder support protrudes outside a shaft portion. And a locking portion in which the center of the end face is high and retreats toward both sides is provided, and the connecting portion is inserted into the mounting device of the earth retaining panel, and the connecting device is rotated to thereby connect the locking portion to the mounting device. In the connecting device for connecting the cut-off beam support to the retaining panel by press-contacting, a fitting of the retaining panel is fitted with an insertion hole into which the coupling is inserted and an outer peripheral portion of the inserted coupling. A circular guide portion, a temporary fixing portion formed in the circumferential direction continuously with the insertion hole, and abutting with the rotating locking portion of the connecting tool; Direction, the thickness is larger than the temporary fastening portion, and the locking portion is Since it is configured and a fastening portion to be contact, after fastening provisionally both ends of all Setsuhari support braced panel, since it is the tightening operation, in which an effect that assembling work can be easily. Further, since the center of the connector always coincides with the center of the insertion hole, if the connector is rotated by a predetermined angle, the connector can be disassembled immediately, so that the disassembling operation can be extremely easily performed.

In the fastening portion of the second aspect of the present invention, a groove is formed at the center for locking the tip of the locking portion, so that the fastening is securely performed and the connecting tool is displaced in the circumferential direction. There is an effect that there is no.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a girder support.

FIG. 2 is a cross-sectional plan view of a cutting beam support.

FIG. 3 is a perspective view in which the retaining panels are connected by cutting beam supports.

FIG. 4 is a perspective view of an end of a cutting beam support.

FIG. 5 is a front view of the retaining panel.

FIG. 6 is a perspective view of a fixture.

FIGS. 7A and 7B are cross-sectional views taken along each break line in FIG. 6, wherein FIG. 7A is a cross-sectional view taken along a line a, FIG. 7B is a cross-sectional view taken along a b line, and FIG. (D) is a cutaway development view along the d-line.

FIGS. 8A and 8B are diagrams showing a first step of connecting the retaining panel with a cutting beam support, wherein FIG. 8A is a front view and FIG. 8B is a partially cutaway side view.

9A and 9B are diagrams showing a second step, in which FIG. 9A is a front view, and FIG. 9B is a cross-sectional view along line b.

FIGS. 10A and 10B are diagrams showing a third step, in which FIG. 10A is a front view, FIG. 10B is a cross-sectional view along line b, and FIG. 10C is a cross-sectional view along line c.

FIG. 11 is a perspective view of connecting a retaining panel in a conventional example with a cutting beam support.

FIG. 12 is a view showing a first step of connecting the earth retaining panel with a cutting beam support, wherein (a) is a longitudinal sectional front view,
(B) is a cross-sectional plan view.

13A and 13B are diagrams showing a final step of connecting the retaining panel with a cutting beam support, wherein FIG.
(B) is a cross-sectional plan view.

[Explanation of symbols]

 Reference Signs List 20 cutting beam support 25 connecting tool 25a shaft section 25b locking section 41 earth retaining panel 43 mounting tool 44 insertion hole 45 guide section 46 temporary fixing section 47 fastening section 48 groove section 50 connecting device

Claims (2)

[Claims] 1. A connecting device for a girder support for supporting pressure of an earth retaining panel in an open-cutting method or the like, wherein a connecting tool attached to the girder support protrudes outside a shaft portion and has a center of an end face. A locking portion that retreats high toward both sides is provided, and the connecting member is inserted into a mounting member of a retaining panel, and the connecting member is rotated to press the locking portion against the mounting member, thereby forming the cutting beam. In a connection device for connecting a support to a retaining panel, a mounting tool for the retaining panel is provided with an insertion hole into which the coupling tool is inserted, and a circular guide portion into which an outer peripheral portion of the inserted coupling tool is fitted. A temporary fixing portion formed in the circumferential direction continuously with the insertion hole and contacting with the rotated locking portion of the connecting tool; and a temporary fixing portion formed in the circumferential direction continuously with the temporary fixing portion. Tightening in which the thickness is larger than the fastening portion and the locking portion is pressed against the fastening portion And a connecting device for the girder support. 2. The connecting device for a girder support according to claim 1, wherein the fastening portion is formed at the center thereof with a groove for locking the tip of the locking portion.