JP3009431U - Earth retaining support for trenches - Google Patents

Abstract

(57) [Summary] [Purpose] Adopting a screw and bevel gear mechanism for expansion and contraction function,
By improving the structure and materials, we ensure safety and reduce weight, and provide a compact support that enables narrow-range operation and efficient work. [Structure] Two bevel gears 6, 7 with which the jack portion 5 meshes
The internal threaded portion 6a is provided on one side, and the rotation drive mechanism section 10 is provided on the shaft end of the bevel gear on the other side. [Effect] In the support jack, the bevel gear is selected and used in a limited manner, and the operation axis direction is easy to select in a target direction and easy to manufacture, and can be provided at low cost and at low cost.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention adopts a screw and a bevel gear mechanism for expansion and contraction of a timber girder for earth retaining material used for excavation work to improve safety and weight by improving the structure and material, and to operate in a narrow range. And a soil retaining support for a compact digging trench that enables efficient work.

[0002]

[Prior art]

 In pipe laying work, etc., earth retaining on the excavation groove after excavation is applied to the sheet pile so as to face the wall surfaces of both grooves corresponding to the excavation groove so as to face each other and to prevent the sheet pile from falling down. It is customary to carry out support work by erection of support jacks for retaining the soil through the upset (crossbar). However, most of these conventional soil retaining supports were constructed so that they could be expanded and contracted through the handle etc. installed on them, and as a result, when raising the abdomen (crossbar) and installing the support, Workers are required to enter the excavation ditch to do this, while the excavation ditch immediately after excavation is extremely easy to collapse.Therefore, landslides occur during erection work of the support. It was inevitably accompanied by the danger of causing a serious accident to personnel. In the past, a sheet pile (soil retaining plate) was applied along the side walls on both sides, and then a rope was used to raise the rope (a crossbar) to an appropriate height and both sides of the support were pressed against the sheet pile to raise the so-called belly. Since it is done with a lot of manpower, it has a defect that makes it difficult to perform agile work.

[0003]

[Problems to be solved by the device]

 The present invention was devised to solve the above-mentioned conventional drawbacks, and when the support is erected, the expansion and contraction operation of the support can be performed remotely from the outside of the excavation groove and the belly. The purpose is to make it possible to perform all operations from the raising set to the installation of the soil retaining support that is pressed against the sheet pile, safely and easily from the ground, and to support the earth retaining material used for excavation work. The purpose of this is to improve safety and reduce weight by adopting a structure and material, and to provide a compact support that enables operation in the ridge range and efficient work.

[0004]

[Means for Solving the Problems]

 The present invention has been made to solve the above problems, and its gist is that the main mechanism of the jack part that receives a load is a bolt-shaped threaded rod, a female threaded part that is screwed into it, and In a screw type support mechanism that has a bearing bush that receives the thrust load of the female screw part, rotate the female screw part on one of the two bevel gears that mesh with the jack part and rotate the bevel gear shaft end on the other end. It is a soil retaining support for excavation trenches, which has a structure in which each drive mechanism is provided so that the beams can be expanded and contracted slowly. Next, the present invention will be described in detail with reference to the following embodiments with reference to the drawings.

[0005] First, A is a pair of corresponding uprisings 13 and 13 each provided with detachable suspending ropes 18 that come into contact with the sheet piles 16 on both side wall walls of the excavation groove 15, and both bellies forming the pair. It is a rectangular frame shape composed of a pair of support jacks 14 and 14 which can be remotely operated from the ground and which can be releasably and compositionally connected to each other on both sides between the uprights 13 and 13. The pair of support jacks 14 and 14 described above can be expanded and contracted by remote operation from the ground by the crank handle 12 of the rotary drive mechanism 10 of the jack 5, respectively. The end members 1 and 2 are attached to the upright member 13 via the coupler 20 respectively. In this invention, however, the main mechanism of the jack portion 5 that receives a load has a bolt-shaped screw rod 8, a female screw portion 6a that is screwed into the screw rod 8, and a bearing bush 9 that receives the thrust load of the female screw portion 6a. In this type of support mechanism, one of the two bevel gears 6 and 7 with which the jack portion 5 meshes is provided with the female screw portion 6a, and the other bevel gear shaft end is provided with the rotary drive mechanism portion 10 respectively. The beam (support) is configured to slowly expand and contract. In addition, 3 is an outer ram, 4 is a ram, 8a is a male screw part, 11 is a bellows, 17 is a hanging rod, and 19 is a lifting stop nut.

[0006]

[Effect of device]

 Generally, it is usually operated in the excavation trench, but in the present invention, it is safe because it can be operated remotely from the outside (outside) of the excavation trench. It is also safe to stop at any position even if the earth retaining part that was supporting the sheet pile is cracked and likely to collapse when the support is used for excavation to expand the support and reduce the work completion. . Besides, it has a simple structure and is easy to handle. Also, compared to the mechanism (structure) that directly rotates the female screw part or screw rod (male thread side) without the bevel gear mechanism, the operating force can be selected up or down according to the tooth ratio of the two gears. Therefore, a large thrust (output) can be obtained with a light (small) force, and the screw can be expanded and contracted quickly because the number of rotations is small. In the present invention, a bevel gear is selected and used in a limited manner in the support jack, and the operation axis direction is easy to select in the desired direction and easy to manufacture, and there is an advantage that it can be provided at low cost and at low cost. In addition, since the members are made of lightweight aluminum alloy, they can be installed and removed easily, and at the time of removing earth retaining materials, the support for the girders can be expanded and contracted slowly to ensure safety against the ground. In addition, the one-touch connection material, the cross beam and the abdomen can be integrated easily and quickly to form a safe structure. The jack does not automatically return, so it can be completely fixed at any position.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of a main part of a support jack of the present invention.

FIG. 2 is a perspective view of a frame-shaped set state of the present invention.

FIG. 3 is an explanatory view of a support jack of the present invention.

[Explanation of symbols]

 A Frame-shaped 1,2 End member 3 Outer ram 4 Ram 5 Jack part 6 Large bevel gear 6a Female screw part 7 Small bevel gear 8 Screw rod 8a Male screw part 9 Bearing bush 10 Rotation drive mechanism part 11 Bellows 12 Crank handle 13 Raised 14 Support jack 15 Drilling groove 16 Sheet pile 17 Suspension rod 18 Suspension rope 19 Lifting stop nut 20 Coupler

Claims (1)

[Scope of utility model registration request] The main mechanism of the jack portion 5 that receives a load is a bolt-shaped screw rod 8, a female screw portion 6a screwed to the screw rod 8, and a female screw portion 6 thereof.
In a screw type support mechanism having a bearing bush 9 for receiving the thrust load of a, the female screw portion 6a is provided on one of the two bevel gears 6 and 7 of the jack portion 5 which mesh with each other, and the bevel gear shaft end on the other side. An earth retaining support for an excavation trench, in which each of the rotary drive mechanisms 10 is provided in the above, and the cutting beam is configured to slowly expand and contract.