JPH0730748Y2 - Earth retaining frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a retaining frame used to prevent a collapse accident during excavation work on the ground.

(Prior Art) Conventionally, during excavation work on the ground, excavation is performed while building a wooden sheet pile on the ground, and with the progress of the excavation depth, the side surface of the wooden sheet pile is supported by a timber or the like to raise the belly. , The wood sheet pile and the timber were fixed by nails, and the excavation was sequentially performed.

(Problems to be solved by the invention) However, as described above, the excavation groove support work using the wood sheet pile and the square timber is performed while the operator is in the excavation groove. The work is tedious and time-consuming, and if nailing is not done securely, the ground loosens, causing a collapse accident, and there is a risk that workers who were working in the trench will be buried. It was

An object of the present invention is to provide an earth retaining frame which can be installed easily and safely in parallel with excavation work.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention forms a frame into a panel shape of a substantially quadrangular shape, and at the same time, with respect to the frame body surface side at the corners of both ends of the upper side. It is configured by projecting locking guides for locking both end portions of the lower side of the frame body located above when the frame bodies are vertically stacked over the side surface side.
The front sides of the above-mentioned frame bodies are opposed to each other, and a holding pipe is detachably installed between both side portions of the frame bodies so that both frame bodies are held at predetermined intervals. .

In addition, an insertion hole is opened in the side surface on the front surface side of the locking guide, and the insertion hole of the frame body located below when the frame bodies are vertically stacked on the front surface side of both ends of the lower side of the frame body. When the locking holes communicating with the above are opened and the frame bodies are vertically stacked, the locking pins can be passed through the insertion holes and the locking holes to connect both frame bodies.

Further, a holding portion having a holding groove into which the end portion of the holding pipe is slidably inserted from the lateral direction is provided at substantially central portions of both side portions on the surface side of the frame body, and the holding pipe end portion is provided with the holding groove of the holding portion. It is preferable that the holding pipe is detachably installed between the opposing frame bodies by engaging with each other.

Further, it is preferable that the frame body has rectangular steel pipes on both sides, grooved steel on the upper and lower sides, and a deck plate fitted in a gap between the upper, lower, left, and right sides.

(Operation) According to the above means, the holding pipes are installed over the both side portions of the two frame bodies, and the two frame bodies are held by the holding pipes in a state of being opposed to each other at a predetermined interval. And when the soil retaining frame assembled in this way is installed in the excavated slot, the wall surface of the excavation groove is supported by both frame bodies,
Collapse is prevented.

When the excavation becomes deeper, another frame of the soil retaining frame is placed on each frame of the soil retaining frame installed in the slot, and it is projected at both ends of the upper side of the frame of the soil retaining frame located below. By the locking guide, both ends of the lower side of the frame of the soil retaining frame located above are locked. As a result, the upper and lower soil retaining frames are properly positioned and stacked by the locking guide.

Further, when the excavation slot is extended, the soil retaining frames can be extended according to the length of the slot by installing the soil retaining frames next to each other in the slot.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The earth retaining frame a has two frame bodies 1 and 1 with their front surfaces facing each other, and has two holding pipes 2 and 2 extending between both side portions of the frame bodies 1 and 1.
It is configured by erection of the detachable.

As shown in FIG. 1, the frame 1 is formed in a horizontally long rectangular panel shape, and the upper and lower sides of the frame 1 are made of lightweight grooved steel 1a, and the left and right sides of the frame 1 are made of square steel pipes 1b. At the same time, the angle steel 1d is attached and fixed along the lightweight channel steels 1a on both upper and lower sides.
Are longitudinally arranged at equal intervals, and a deck plate 1e is fitted between the longitudinal members 1c to close the gap.

As shown in FIG. 1, a holding portion 3 for holding the holding pipe 2 is provided at substantially central positions of both side portions on the front surface side of the frame body 1. As shown in FIG. 5, the holding portion 3 has a cross section L on one side on the outer side of the rectangular contact plate 3a and on three sides on both upper and lower sides.
By fixing the angle-shaped angle steel 3b, the frame 1
A holding groove 3c that opens toward the center is formed.

On the other hand, holding plates 4 are detachably inserted into the holding groove 3c at both ends of the holding pipe 2 and fixed. Then, by inserting the holding plate 4 into the holding groove 3c from the lateral direction in a slidable manner, both ends of the holding pipe 2 are fixed to both frame members.
As a result, the two frame bodies 1 and 1 are held in a state of being opposed to each other with a predetermined gap (length of the holding pipe 2) therebetween. Therefore, the holding pipe 2 is formed to have a length that is substantially the same as the width of the digging slot.

At the corners of both ends of the upper side of the frame body 1, locking guides 5 for locking both ends of the lower side of the frame body 1 of the soil retaining frame a located above when the soil retaining frames a are vertically stacked, 5 are projected.

As shown in FIGS. 2 and 4, the locking guide 5 is formed in an L-shaped cross section by a plate 5a directed to the surface side of the upper side of the frame 1 and a plate 5b directed to the side surface of the frame 1. An insertion hole 5c is opened in the plate 5a facing the front surface side.

Further, at both end portions of the lower side of the frame body 1, that is, on the lower surface sides of the rectangular steel pipes 1b on both the left and right sides, the locking guides 5 of the frame body 1 positioned below when the frame bodies 1 are vertically stacked. A keyhole-shaped locking hole 7 communicating with the insertion hole 5c is opened.

The insertion hole 5c and the locking hole 7 communicate with each other when the soil retaining frames a are stacked vertically, and the locking pin 6 is penetrated through both holes 5a, 7 to further connect the upper and lower soil retaining frames a. Make sure.

As shown in FIG. 3, the locking pin 6 has two locking pieces 6a on one side of the circumferential surface of the round bar so as to project in a straight line in the length direction to form a substantially concave shape in a side view. After stacking the locking pins 6 into the insertion holes 5c of the locking guides 5 in the frame body 1 located below and into the locking holes 7 of the rectangular steel pipes 1b in the frame body 1 located above It is configured so that one locking piece 6a can be rotated and locked around the locking hole 7.

Thus, the soil retaining frame a slides the holding plates 4 at both ends of the holding pipe 2 from the lateral direction with respect to the holding grooves 3c of the holding portions 3 provided on both sides of the two frame bodies 1 and 1. By inserting and locking, both frames 1, 1 are assembled in a state of facing each other at a predetermined interval, that is, at an interval substantially the same as the width of the excavation groove hole.

The soil retaining frame a is assembled on the ground, and the assembled soil retaining frame a is installed in the excavated slot. When the soil retaining frame a is installed in the excavated slot, the wall surfaces of the excavation groove are supported from the inside by the opposing frame bodies 1 and 1, and collapse is prevented.

When the excavation slot becomes deep, another soil retaining frame a is placed on the soil retaining frame a installed in the slot. At that time, the both ends of the lower side of the frame 1 of the upper soil retaining frame a are fitted to the inside of the locking guide 5 of the frame 1 of the lower soil retaining frame a to guide the upper soil retaining frame a to a proper position. Stack up.
Further, by inserting the locking pin 6 into the insertion hole 5c formed in the locking guide 5, rotating the locking pin 6 and locking the locking piece 6a in the locking hole 7, the retaining frame a Are stacked in two stages and are securely connected in a properly positioned state.

Further, when the excavation slot is extended, the soil retaining frames a can be freely extended in accordance with the length of the excavation groove by installing the soil retaining frames a adjacent to each other in the excavation slot.

(Effects of the Invention) Since the present invention is configured as described above, the following effects are achieved.

Since each soil retaining frame can be assembled on the ground, it is possible to sequentially install the soil retaining frame in the slot while excavating the slot, and also corresponding to the depth of the slot to be excavated. By doing so, the soil retaining frames can be vertically stacked and assembled while being properly positioned, so that the installation work becomes much simpler and the work efficiency can be improved compared to the conventional case.

Therefore, when installing the soil retaining frame, it is not necessary for the worker to enter the slot, and thus the installation work of the soil retaining frame can be safely proceeded.

According to the soil retaining frame of the second aspect, there is no concern that the soil retaining frames stacked in the vertical direction are displaced from each other, and the connected state of the both can be made more reliable.

According to the soil retaining frame of the third aspect, both frame bodies can be easily held by the holding pipe.

According to the soil retaining frame of the fourth aspect, it is possible to reduce the weight of the frame body and improve workability and soil retaining effect.

[Brief description of drawings]

FIG. 1 is a front view showing the soil retaining frame of the present invention, FIG. 2 is a perspective view showing the soil retaining frame opposed by a retaining pipe, and FIG. 3 (a).
Is a cross-sectional view of the locking pin, FIG. 3 (b) is a side view of the locking pin, FIG. 4 is an enlarged front view showing a connecting portion between stacked frame bodies, and FIG. 5 (a) is a holding body. And FIG. 5 (b) is a side view of the holder. In the figure a …… Soil retaining frame 1 …… Frame 2 …… Holding pipe 3 …… Holding part 3c …… Holding groove 5 …… Locking guide 5c …… Insertion hole 6 …… Locking pin 7 …… Locking hole 1e …… Deck plate

Claims (4)

[Scope of utility model registration request] 1. A frame body is formed in a substantially quadrangular panel shape, and extends over the frame body surface side and side surface side at the corners of the upper side both ends thereof when the frame bodies are stacked vertically. Locking guides for locking both ends of the lower side of the frame body are provided so as to connect the both ends of the lower side of the frame body to the front surface side of the locking guide, and An earth retaining frame in which both front and back sides are opposed to each other and holding pipes are detachably installed over both side portions of the respective frame bodies to hold the both frame bodies at a predetermined interval. 2. An insertion hole is opened in a side surface of a front surface side of the locking guide, and the frame body positioned below the frame bodies is vertically stacked on the surface sides of both end portions of the lower side of the frame body. A method in which both the frame bodies are connected by penetrating a locking pin into the insertion hole and the locking hole when the locking holes communicating with the insertion hole are opened and the frame bodies are stacked vertically. 1) The earth retaining frame described. 3. A holding portion having a holding groove into which the end portion of the holding pipe is slidably inserted in the lateral direction is provided at substantially central portions of both side portions on the front surface side of the frame body, and the holding pipe end portion is provided with the holding portion. The soil retaining frame according to claim 1 or 2, wherein the retaining pipe is detachably installed between the opposing frame bodies by engaging with the retaining groove. 4. The frame body, wherein both sides are made of rectangular steel pipes, upper and lower sides are made of grooved steel, and a deck plate is fitted in a gap between the upper, lower, left and right sides (1) or ( Earth retaining frame described in 2) or (3).