JPH0351368Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an earth retaining supporter that prevents the collapse of both side walls of a trench, and even when the opposite sides of the side walls are inclined, the first pressure contact plate The second press-contact plate can be opposed to the second press-contact plate with an inclination matching the inclination of the second press-contact plate.

(Prior art) An earth retaining supporter is a device that presses both side walls of a trench dug on the ground using a first pressure contact plate and a second pressure contact plate to prevent collapse until the trench is backfilled. As exemplified in Publication No. 42507,
It consists of a main tube, a telescoping device fixed to the end of the main tube, and a child tube fitted freely into the main tube and the telescoping device, and is used very effectively.

(Problems to be solved by the invention) The earth retaining supporter has a good structural integrity, but when the opposing surfaces of the groove walls are sloped, the contact between the first and second pressure plates becomes poor. There is a drawback that the action of the earth retention becomes unstable. The present invention aims to solve this drawback.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the earth retaining supporter of the present invention has a first supporter that connects the earth retaining supports in the length direction, and a child pipe attached to the end of the main pipe. It consists of a fixed telescoping device and a second supporter that extends and contracts freely through the main pipe and projects the main pipe in the direction of the first supporter, and the first supporter has an end portion corresponding to one groove wall. A first pressure contact plate and a pin receiving fitting consisting of an engaging recess are provided, and the second supporter has an engaging pin that is rotatably fitted into the engaging recess of the pin receiving fitting of the first supporter on the main tube, and an engaging pin that fits freely in the engaging recess of the pin receiving fitting of the first supporter on the main tube, and a second corresponding to the other groove wall;
It is characterized by the provision of a pressure contact plate.

(Example) In Fig. 1, 1 is the first supporter, 11 is the second supporter, and 11 is the second supporter.
Be a supporter. As shown in FIGS. 2 and 4, the first supporter 1 has a first supporter 1 at the end corresponding to one groove wall a.
Several engagement recesses 4, 4 are provided by protruding the pin holders 3, 3 in parallel from both ends of the pressure contact plate 2 in the width direction, and a plurality of reinforcing connecting rods 5 are inserted between the pin holders 3, 3. and fix it. The second supporter 11 is the main tube 13
A telescopic device 12 is fixed to the end of the tube, and the child tube 14 is freely expanded and contracted through the telescopic device 12 and the main tube 13.
The main tube 13 is protruded toward the first supporter 1, and a second press plate 15 corresponding to the other groove wall b is fixed to the end of the daughter tube 14 protruding from the expansion/contraction device 12.

The expansion and contraction device 12 is an example of the expansion and contraction device of the present invention, and normally includes a swingable expansion release plate 16 that engages the hole edge of the subtube 14 to prevent it from moving in the contraction direction. First and second coil springs 17 and 18 that come into elastic contact with both surfaces of the release plate 16 are provided.

The first coil spring 17 is inserted between the inner surface of the expansion and contraction device 12 and the right side surface of the expansion release plate 16 in FIG.
Reference numeral 19 designates a movable engagement plate, which is pushed by a second coil spring 18 applied to the left side of the extension release plate 16 in FIG. The head is in contact with the second coil spring 1.
8, the hole edge is removed from the tube 14 without being pushed completely, and the engagement plate 19 is moved to the second
1 against the elasticity of the coil spring 18, the hole edge bites into the daughter tube 14, and the daughter tube 14 is moved to the right in FIG. At this time, the extension release plate 16 is pushed in the y direction by the coil spring 18 to loosen its grip on the daughter tube 14, but if it is actively manually moved in the y direction, it completely releases its bite on the daughter tube 14. By repeating these operations, the child tube 14 can be extended.

The contraction of the daughter tube 14 is performed by the first pressure contact plate 2 and the second pressure contact plate 1.
When removing the extension release plate 16 from the sheet pile etc.
Manually move it in the direction opposite to the arrow y in Figure 1.

The present invention does not specify the configuration of the expansion/contraction device, and other contraction devices can be freely used.

The second supporter 11 has a distal end portion corresponding to the first supporter 1 that is inserted into the engagement recesses 4, 4 of the pin receivers 3, 3 of the first supporter 1, and is fitted into the engagement recesses 4. , 4, an engagement pin 21 that freely rotates is attached so as to protrude left and right.

As shown in Figure 4, the trench wall a of the trench dug on the ground,
Place the sheet piles 31, 31 on b. The first pressure contact plate 2 and the second pressure contact plate 15 are brought into contact with each of the sheet piles.
2 are often arranged in a row in the vertical direction. In such a case, a headed pin 33 is attached to the first pressure contact plate 2 and the second pressure contact plate 15, and the head of the headed pin 33 is inserted into the head 32a of the daruma hole 32 to open the small diameter hole 3.
2b, thereby supporting supporters 1, 1
1 at any height.

The present invention is particularly effective when trench walls a and b are dug at an angle as shown in FIG.

That is, the sheet piles 31, 31 (or a plate material replacing them) are applied to the inclined groove walls a, b, and the first pressure contact plate 2 of the first supporter 1 and the second pressure contact plate 15 of the second supporter 11 are also applied. At that time, both supports 1 and 11 become chevron-shaped as shown in Figs. 1 and 6, but
The engagement pin 21 is freely fitted into the engagement recesses 4, 4, and the second supporter 11 is moved by operating the expansion and contraction device 12.
When stretched, the first press-contact plate 2 and the second press-contact plate 15 conform to the slopes of the groove walls a and b and come into stable contact. The first supporter 1 and the second supporter 11 maintain the tilted posture illustrated in FIGS. 1 and 6, and are tensed while generating a component force due to pressure contact between the engagement recess 4 and the engagement pin 21. This prevents the groove walls a and b from collapsing.

The present invention is also effective when the groove walls a and b are parallel, in which case the first supporter 1 and the second supporter 11 form a single character shape and are tensioned.

(Operations and Effects of the Invention) The present invention has the functions described in the embodiments shown in Figs. However, the first pressure contact plate 2 of the first supporter 1 and the second supporter 11
The second pressing plate 15 conforms to the longitudinal shape of its groove walls a, b. Further, when tensioning the first supporter 1 and the second supporter 11 by the expansion and contraction device 12, the engagement pin 21 of the second supporter 11 is fitted into the engagement recess 4 of the first supporter 1, and the second supporter 11 is
Since the first and second supports 1 and 11 can be freely rotated, the first and second supports 1 and 11 can extend in an inclined shape or in a straight shape, thereby stably preventing the groove walls a and b from collapsing.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, in which FIG. 1 is a partially cutaway side view of the first supporter 1 and the second supporter 11, FIG. 2 is a side view of the first supporter 1, and FIG.
The figures are a front view cut along the line A-A in Figure 2, Figure 4 is a plan view of the present invention, Figure 5 is a front view of the Daruma hole 32 of the sheet pile 31, and Figure 6 is a side view showing an example of how it is used. It is a diagram. a, b...Groove wall, 1...First supporter, 2...
1st pressure contact plate, 3... Pin holder, 4... Engagement recess, 11... Second supporter, 12... Telescopic device,
15...Second pressure contact plate, 21...Engagement pin.

Claims (1)

[Scope of utility model registration request] A first supporter and a child tube made to be freely expandable and retractable with respect to the parent tube by a telescopic device fixed to the end of the parent tube.
An earth retaining supporter is constructed by connecting a second supporter that protrudes in the direction of the supporter, and the first supporter has a first pressure contact plate at an end corresponding to one groove wall and a pin receiving fitting consisting of an engaging recess. The second supporter is provided with an engagement pin that is rotatably fitted into the engagement recess of the pin holder of the first supporter on the main tube, and a second press-contact plate that corresponds to the other groove wall on the child tube. Features of earth retaining supporter.