JP3252159B2 - Connection device of earth retaining panel in open cut method etc. - Google Patents

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 connecting two retaining panels to each other in an open-cutting method or the like, and more particularly, to assembling a connecting device and fixing a connecting pin from one side of the retaining panel. The present invention relates to an earth retaining panel connecting device in an open-cutting method or the like that enables work.

[0002]

2. Description of the Related Art In an excavation method or the like, as shown in FIGS. 4, 5 and 9, two earth retaining panels 1 are connected at predetermined intervals by cutting beam supports 2 and installed at an excavation site G. Then, the space between the retaining panels 1 and 1 is excavated with a backhoe or the like. The retaining panel 1 has a bladed panel 3 connected to the lower end, and the retaining panels 1 and 3 are sequentially sunk deep underground as the excavation depth increases. And when the depth of the groove becomes deep until the upper end of the retaining panel 1 sinks to the surface of the ground,
Excavation is continued by connecting a new retaining panel 1 to the upper end (see FIGS. 4 and 5).

In this connection, a fitting projection 5 at a lower end of the upper retaining panel 1 is fitted into a fitting hole 4 of the lower retaining panel 1,
The communication holes 6 and 7 are aligned with each other. Therefore, when the connecting pin 8 is inserted from one side of the retaining panel 1, the connecting pin 8 is inserted.
Protrudes to the opposite side. Therefore, the locking pin 9 (only one side is shown) is inserted into the hole at the tip, and this is pressed and fixed to the tip of the connecting pin 8 (see FIG. 10). This allows
The two retaining panels 1 and 1 are connected in a retaining state, and the connecting pin 8 is fixed to the retaining panel 1.

The connecting pins 8 are connected so that the two connected retaining panels 1 are not separated from each other. The connecting pin 8 is a fitting portion between the retaining panel 1 and the bladed panel 3, and the upper and lower retaining panels. It is used for a fitting portion between the first and the first.

[0005]

A plurality of retaining panels 1 are arranged continuously in the longitudinal direction.
Since the height of the retaining panel 1 is high, the inside and the outside of the retaining panel 1 are in a state where the retaining pin 1 is cut off. The work of attaching the locking pin 9 to the tip of the head must be performed by two workers. Therefore, there is a problem that the number of work steps increases. In particular, the work of connecting a new retaining panel 1 to the upper part of the retaining panel 1 is often performed at an excavation site. In this case, since the outside of the retaining panel 1 is in contact with the soil G, there is a problem that the complexity of the operation is further increased.

On the other hand, there is a conventional example in which bolts and nuts are used in place of the connecting pins and locking pins. In this case, however, there is a problem that the threads are clogged or rusted and cannot be removed. Occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to insert a connecting pin from one side of a retaining panel and to assemble the same, and to connect the connecting pin to the retaining panel on the same side. It is an object of the present invention to provide a connection device for retaining panels in an open-cutting method that can be fixed to a panel.

[0008]

According to the first aspect of the present invention, two earth retaining panels 11 connected to each other in an open-cutting method or the like are described with reference numerals used in the embodiments.
The connecting pin 41 is inserted into the communication holes 22 and 24 of the fitting portions 21 and 23 of
And a connecting device for connecting the two and inserting the connecting pin 41 into a retaining state with respect to the retaining panel 11 on the insertion side, and protruding from a surface of one retaining panel 11.
Are provided on both sides of the communication holes 22 and 24 so that
A receiving portion 31 having a retaining hole 32;
4, a connecting pin 41 provided with a through hole 43 communicating with the retaining hole 32 of the receiving portion 31; and a receiving portion 31 inserted into the retaining hole 32 of the receiving portion 31 and the through hole 43 of the connecting pin 41. , The connecting pins can be assembled on one side of the retaining panel, and the connecting pins can be fixed to the retaining panel.

According to a second aspect of the present invention, the receiving portion 31 is
The connection pin 41 is provided so as to surround the communication hole 22, the connection pin 41 is provided with a flange portion 42 that comes into contact with the receiving portion 31 when inserted into the communication holes 22 and 24, and the locking member 44 is a retaining hole of the receiving portion 31. It is characterized in that a locking piece 45 inserted into the through hole 43 of the connecting pin 32 and the connecting pin 41 and a pressure contact piece 46 elastically pressed and fixed to the outer peripheral portion of the receiving portion 31 are integrally provided.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In the excavation method and the like, as shown in FIGS. 3 to 5, two earth retaining panels 11 are connected to each other at predetermined intervals by cutting beam supports 12 and installed at an excavated portion.
The cutting beam support 12 is configured to be adjustable in length,
Adjusted to the excavation dimensions.

The retaining panel 11 has a bladed panel 1 at the lower end.
3 is excavated with a backhoe or the like between the retaining panels 11 and 11, and the retaining panels 11 and 13 are sequentially sunk deep underground as the excavation depth increases. Then, when the depth of the groove becomes deeper until the upper end of the retaining panel 11 sinks to the surface of the ground, a new retaining panel 11 is connected to the upper end to continue excavation (see FIGS. 4 and 5).

The earth retaining panel 11 has rectangular tubular vertical beams 14 on both sides, and a face plate 15 is connected by welding to the surface of a plurality of horizontal beams (not shown) connected between the vertical beams 14. This is the configuration.

The upper end of the vertical beam 14 has a fitting hole 21 for connection.
A communication hole 22 that penetrates the retaining panel 11 is formed on the side surface. Further, a fitting projection 23 protruding downward is provided at a lower end portion of the vertical beam 14, and when the retaining panels 11 are stacked vertically, the fitting projections 23 are formed in the fitting holes 21 of the lower retaining panel 11 from above. Mated. A communication hole 24 is formed in a side surface of the fitting projection 23.
The communication hole 24 matches the communication hole 22 when the fitting protrusion 23 is fitted into the fitting hole 21.

As shown in FIG. 1, the fitting hole 21 and the fitting projection 23 are formed of two parallel plate members, and the communication hole 22 and the communication hole 24 are formed of these two plate members. However, if the communication hole 22 and the communication hole 24 of at least one of the plate members are fitted to the connection pins 41 described later, the communication hole 22 and the communication hole 24 of the other plate member are formed. May be configured to have a diameter larger than one of the communication holes 22 and 24 for facilitating assembly, or may be formed in an elongated hole shape.

As shown in FIGS. 1 and 2, the receiving portion 31 is provided so as to protrude from one surface portion of the retaining panel 11, for example, an inner surface portion. The receiving portion 31 has a horseshoe shape whose lower part is open, and is welded around the communication hole 22. Further, a retaining hole 32 that passes through the center of the communication hole 22 in the horizontal direction is formed.

The connecting pin 41 has a flange 42 projecting from an end thereof, and a through hole 43 formed near the flange 42. When the connection pin 41 is inserted into the communication hole 22, the flange portion 42 comes into contact with the end surface of the receiving portion 31, and the tip thereof is substantially flush with the earth retaining panel 11. It communicates with the stop hole 32.

The locking member 44 is formed by folding an elastic member, for example, a piano wire, and includes a linear locking piece 45 and a pressure contact piece 46 having an arc-shaped concave portion 46a.

Next, a procedure for vertically connecting the two retaining panels 11 will be described. First, the fitting projection 23 at the lower end of the upper retaining panel 11 is fitted into the fitting hole 21 of the lower retaining panel 11 so that the communication holes 22 and 24 are aligned with each other.

When the connecting pin 41 is inserted into the communication holes 22 and 24 from the inside of the retaining panel 11, the flange portion 42 comes into contact with the receiving portion 31 and stops, and the through hole 43 is stopped.
Connect to 2.

Therefore, the retaining holes 32 and the through holes 43
Then, when the locking piece 45 of the locking member 44 is inserted and pushed in, the pressing piece 46 is elastically deformed along the outer surface of the receiving portion 31, and when the locking piece 45 passes through the receiving portion 31, the concave portion 46 a is received. It is pressed against the part 31.

Thus, the two retaining panels 11, 1
1 is a connecting pin 4 via a fitting hole 21 and a fitting projection 23.
1 and the locking member 44 is integrated with the connecting pin 41 so as to be in a retaining state with respect to the retaining panel 11.

According to the above-described embodiment, when two earth retaining panels 11 are vertically connected, the fitting projection 2 is formed in the fitting hole 21.
After the 3 is fitted, when the connecting pin 41 is inserted from the inside of the retaining panel 11, the two are connected. Further, the locking member 44 can be inserted into the receiving portion 31 and the connecting pin 41 to be integrated with the receiving portion 31. Therefore, since one worker can perform the connection work of the retaining panel 11 from one direction, the operation is remarkably easy, and even when the soil exists outside the retaining panel 11 at the excavation site, the assembly work is not required. Has an excellent effect that there is no problem.

FIG. 6 shows a second embodiment of the present invention. The difference from the first embodiment is that one end 2 of the fitting hole 21 is provided.
1a is closed. In this embodiment, when the connecting pin 51 is inserted into the communication holes 22 and 24,
Since the front end contacts the one end 21a of the closed fitting hole 21, the collar 42 is not necessarily required. The second embodiment also has the same effects as the first embodiment.

FIGS. 7 and 8 show a third embodiment of the present invention. Differences from the first embodiment will be described.

The receiving portions 61 are located on both sides of the communication hole 22 of the fitting hole portion 21 and are erected in parallel.
Is formed with a retaining hole 32. The connecting pin 62
It has a head 63 of the same shape as the screw instead of the flange,
A through hole 43 communicating with the communication hole 22 is formed.

The locking member 64 has a rectangular frame shape with one end opened, is linear, and is inserted into the communication hole 22 and the retaining hole 32 so that the distal end portion 65a projects from the communication hole 22. It is composed of a stop piece 65 and a connecting portion 66 which has a U-shape and one end of which is engaged with a distal end 65 a of the engagement piece 65. The third embodiment also has the same effects as the first embodiment.

[0028]

According to the first aspect of the present invention, in a digging method or the like, a connecting pin is inserted into a communication hole of a fitting portion of two earth retaining panels connected to each other, and the two are connected to each other. A connection device for preventing the retaining panel from being pulled out from the retaining panel on the insertion side, wherein the surface portion of the one retaining panel is
Provided on both sides of the communication hole so as to protrude therefrom,
A receiving portion having a retaining hole, a connecting pin provided with a through hole communicating with the retaining hole of the receiving portion when inserted into the communication hole, and a connecting pin inserted into the retaining hole of the receiving portion and the through hole of the connecting pin. Since it is composed of the locking member attached to the receiving portion, the connecting operation of the retaining panel by the connecting pin can be assembled from one side, and the connecting pin is fixed to the retaining panel on the same side. Therefore, there is an excellent effect that the work can be remarkably facilitated.

According to a second aspect of the present invention, the receiving portion is provided so as to surround the communication hole of the fitting portion, and the connecting pin is provided with a flange portion which comes into contact with the receiving portion when inserted into the communication hole. The stopper member is provided integrally with a retaining piece inserted into the retaining hole and the through hole of the connecting pin and a pressure contact piece elastically pressed and fixed to the outer peripheral portion of the receiving portion. This has an excellent effect that the work of connecting the fastening panels can be further facilitated.

[Brief description of the drawings]

FIG. 1 is an enlarged vertical sectional side view showing a main part of a connecting device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view showing a state where the earth retaining panel is assembled.

FIG. 4 is a front view showing a first step in an excavation state.

FIG. 5 is a front view showing a second step in an excavation state.

FIG. 6 is an enlarged vertical sectional side view showing a main part of a connecting device according to a second embodiment of the present invention.

FIG. 7 is an enlarged vertical sectional side view showing a main part of a connecting device according to a third embodiment of the present invention.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a perspective view showing a state in which a retaining panel is assembled in a conventional example.

FIG. 10 is a perspective view of a main part showing a state where a locking pin is attached to a connecting pin.

[Explanation of symbols]

11 Retaining panel 21 fitting portion 22 through hole 23 fitting portion 24 communicating hole 31 receiving portion 32 stopper hole 41 connecting pin 42 the flange portion 43 through hole 44 locking member 45 locking piece 46 pressing member 51 connecting pin 61 received Part 62 connecting pin 63 head 64 locking member 65 locking piece 66 connecting part

Claims (2)

(57) [Claims] In a digging method or the like, a connecting pin is inserted into a communication hole of a fitting portion of two earth retaining panels connected to each other to connect the two, and the connecting pin is connected to the earth retaining panel on the insertion side. A connection device for keeping the connection device in a state in which the connection device protrudes from a surface of the one retaining panel.
A receiving portion provided on both sides of the through hole and having a retaining hole; a connecting pin provided with a through hole communicating with the retaining hole of the receiving portion when inserted into the communication hole; A coupling device comprising: a hole and a locking member inserted into the through hole of the coupling pin and attached to the receiving portion. 2. The receiving portion is provided so as to surround a communication hole of a fitting portion, the connecting pin is provided with a flange portion that comes into contact with the receiving portion when inserted into the communication hole, and the locking member is prevented from coming off. The retaining piece inserted into the hole and the through-hole of the connecting pin and the outer peripheral portion of the receiving portion are elastically pressed and pressed.
2. The connecting device according to claim 1, wherein the fixed pressing piece is provided integrally.