JP3047320U - Assembling manhole tool - Google Patents

Abstract

(57) [Summary] [Problem] To enable safe and efficient assembly of manholes. SOLUTION: This is an application tool used for construction of an assembling manhole constructed by combining concrete bodies 30 formed in a plurality of segments, and is provided in a radial direction between inner wall surfaces at an opening of a connection portion of the concrete body 30. A telescopic body part 10 formed in a rod-like body, which is attached so as to be bridged,
A plate-like body attached to each end of the elastic body portion 10,
A locking projection 22 formed in a curved portion having an upper portion curved inward to guide the inner surface of the next-stage concrete body, and being locked on the outer surface to the upper edge of the inner surface of the opening of the concrete body. And a guide portion 20 provided with a guide portion.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a tool used for constructing a manhole.

[0002]

[Prior art]

 There is a manhole construction method in which a concrete body formed into a plurality of segments is assembled on site and integrally formed. FIG. 4 shows an example in which concrete bodies 5a, 5b, and 5c formed in three segments of a bottom portion, a center portion, and an upper portion are combined to form a manhole. Since the concrete bodies 5a, 5b and 5c are pre-formed at the factory, manholes can be formed on site by simply combining these concrete bodies 5a, 5b and 5c.

[0003] When actually constructing, a hole is dug in a place where a manhole is to be installed, and a concrete body is installed in the hole to assemble. Since the concrete body is heavy, it is hung by a crane, and the connecting part is sealed and piled up while aligning the concrete body 5a at the bottom in order.

[0004]

[Problems to be solved by the invention]

 In this way, the assembling type manhole is assembled while hanging the concrete body of each segment with the crane, but when placing the concrete body on the lower concrete body, the upper and lower connecting parts are accurately Must be aligned. However, it is difficult to operate the crane accurately to position the concrete bodies. Therefore, conventionally, the concrete bodies are stacked in the manhole by adjusting the position where the concrete bodies are lowered manually.

[0005] Such manual work has problems in terms of work safety, work efficiency is poor, and construction accuracy is poor. The present invention has been made in order to solve such a problem, and can be easily used for construction work of an assembling manhole, thereby improving work efficiency and improving work safety. The purpose is to provide tools for manholes.

[0006]

[Means for Solving the Problems]

 The present invention has the following configuration to achieve the above object. In other words, the tool is used for the construction of an assembling manhole constructed by combining concrete bodies formed in a plurality of segments, and is spanned in a radial direction between inner wall surfaces at an opening of a connection portion of the concrete body. The upper and lower portions are curved inward to guide the inner surface of the next-stage concrete body, with the elastic body portion formed into a rod-like body and the plate-like bodies attached to both ends of the elastic body portion, respectively. And a guide portion provided on the outer surface with a locking projection locked on the upper edge of the inner surface of the opening of the concrete body. Further, the expansion and contraction section has a biasing means for constantly resiliently biasing in the radial direction, and the guide section can be elastically provided between inner wall surfaces of the concrete body. When a biasing means is provided to bias the telescopic body in the radial direction so that the tool can be elastically attached to the inner wall surface of the concrete body, it is extremely easy to attach and remove the tool. There is an advantage that you can. In addition, the expansion / contraction body part extrapolates a large-diameter pipe so as to be slidable on the small-diameter pipe, and provides an urging means for radially repelling between the small-diameter pipe and the large-diameter pipe, A lever for sliding the small-diameter pipe and the large-diameter pipe relative to each other is attached to the small-diameter pipe and the large-diameter pipe.

[0007]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing an embodiment of a tool for assembling manholes, and FIG. 2 is an explanatory view showing a method of using the tool. The tool of the assembling manhole has an elastic body portion 10 formed in a stretchable rod-like body, and guide portions 20 attached to both ends of the elastic body portion 10. As shown in FIG. 2, the application tool is used by bringing the outer surface of the guide portion 20 into contact with the inner surface of the concrete body constituting the manhole and elastically projecting in the radial direction of the concrete body by the elastic force of the elastic body portion 10. I do.

[0010] The manhole application tool of the embodiment shown in FIG. 1 is formed as a telescopic body portion 10 into a rod-shaped body in which a small-diameter pipe 12a and a large-diameter pipe 12b are extrapolated at the end of the small-diameter pipe 12a. You. In the embodiment, a pipe having a diameter of 27 mm is used as the small-diameter pipe 12a, and a pipe having a diameter of 33 mm is used as the large-diameter pipe 12b. The total length of the small-diameter pipe 12a and the large-diameter pipe 12b is set to be equal to the inner diameter of the manhole. In the embodiment, the small-diameter pipe 12a is formed longer than the large-diameter pipe 12b. Generally, manholes having an inner diameter of 900 mm are used. The length of the pipes 12a and 12b is set so that the tool of the present embodiment also has a length of approximately 900 mm before and after the total length of the elastic body portion 10.

The elastic body portion 10 is always urged in a direction in which the elastic body portion 10 elastically projects in the axial direction so that the elastic body portion 10 can be elastically provided on the inner surface of the concrete body constituting the manhole. In the embodiment, a resilient spring (not shown) is mounted inside the large-diameter pipe 12b to apply a resilient force between the small-diameter pipe 12a and the large-diameter pipe 12b. In addition, the configuration that allows the elastic body portion 10 to expand and contract with a required urging force may be any as long as elasticity is applied between the small-diameter pipe 12a and the large-diameter pipe 12b. It is not limited to.

In the embodiment, the levers 14a and 14b are spaced at such a distance that one side of each of the small-diameter pipe 12a and the large-diameter pipe 12b can be gripped by one hand to facilitate the expansion and contraction operation of the expansion and contraction unit 10. It was raised and fixed. By gripping the levers 14a and 14b, the telescopic body portion 10 is expanded and contracted to facilitate installation and removal of the tool. Reference numeral 16 denotes a guide body for guiding the levers 14a and 14b to reciprocate linearly when operating the levers 14a and 14b. The guide body 16 also functions as a stopper that regulates the state where the small-diameter pipe 12a and the large-diameter pipe 12b are maximized.

The above-described urging force for repelling the small-diameter pipe 12a and the large-diameter pipe 12b can also be obtained by applying a resilient force between the levers 14a and 14b. That is, it is also possible to obtain a resilient force by mounting a resilient spring between the bases of the levers 14a and 14b inside the small-diameter pipe 12a and the large-diameter pipe 12b. The elastic body 10 is constituted by the small-diameter pipe 12a, the large-diameter pipe 12b, and the resilient means for repelling them.

The guide portion 20 is formed in a rectangular shape using a metal plate. As shown in FIG. 1, one end of a small-diameter pipe 12a and the other end of a large-diameter pipe 12b are perpendicular to the axial direction of the pipe body. Stand up and attach. In the embodiment, the size of the guide portion 20 is 100 mm in width and 150 mm in height. The guide portion 20 is formed as a curved portion 20a having an upper portion curved inward. The curved portion 20a is provided to guide the concrete body to a predetermined position when stacking the concrete body which is a segment of the manhole.

A locking protrusion 22 is formed in the width direction (horizontal direction) at a substantially central portion in the vertical direction on the outer surface of the guide portion 20. The locking projections 22 are used to abut the upper edge of the interior of the concrete body when the tool is mounted on the concrete body so as to prevent the tool from slipping. In the embodiment, the locking projection 22 is formed over the entire width of the guide portion 20, but need not necessarily be formed over the entire width. In the embodiment, the locking projection 22 has a thickness of 3 mm and a projection length of 9 mm.

In the embodiment, the guide portion 20 is slightly curved in the width direction in accordance with the curved surface of the inner peripheral surface of the concrete body. As a result, the outer surface of the guide portion 20 abuts against the inner wall surface of the concrete body, and the locking projection 22 is securely engaged with the upper edge of the concrete body.

Next, a description will be given of a method of using the tool for assembling manholes according to the above embodiment. The manhole tool is used to connect the concrete bodies of the segments that make up the manhole, and two tools are used at the opening of the concrete body installed at the predetermined position as shown in Fig. 2. Place in a cross. The application tools are arranged in a cross shape in order to facilitate positioning by guiding the concrete body 30 at four points. Of course, the guide may be provided at six or more points using three or more application tools.

In the application tool, since the elastic body portion 10 can elastically expand and contract in the axial direction, the elastic body portion 10 is shortened by gripping the levers 14a and 14b, and the inside of the concrete body 30 is parallel to the opening surface. The guide portion 20 can be attached to the inner wall surface of the concrete body 30 by pressing the guide portion 20 by releasing the levers 14a and 14b in the radial direction. The tool is supported so that it does not slip down on the inner surface of the concrete body 30 by the elastic force of the elastic body 10 and the locking projection 22 being locked to the upper edge inside the opening of the concrete body 30. It is necessary to use a pair of tooling tools with different mounting height positions of the telescopic body part 10 at the guide part 20 so that the telescopic body part 20 does not interfere when the tool is mounted in a cross shape. There is.

At the time of connecting and installing the concrete bodies, as shown in FIG. 2, after the application tool is installed at the opening portion of the lower concrete body 30, the concrete bodies for connection are connected using a crane. It is suspended gradually in accordance with the lower concrete body 30, and the inner surface of the upper concrete body is guided and suspended by the guide portion 20 of the tool. When the concrete body is lifted and lowered by using a crane, the concrete body may be slightly displaced from a predetermined position. However, the guide portion 20 is curved inward at an upper portion and acts to correct the displacement. The operator can adjust the position of the concrete body 30 at the lower stage naturally by simply adjusting the outside while checking the hanging position of the concrete body.

FIG. 3 is an enlarged view showing a state where the application tool is mounted inside the concrete body 30. The guide portion 20 is pressed against the inner wall surface of the concrete body 30 by the elastic force of the elastic body portion 10, and the locking projection 22 is locked on the upper edge of the inner surface of the concrete body 30. The edge of the inner peripheral surface of the concrete body 30 is chamfered, and the locking projection 22 enters into the chamfered recess. In FIG. 3, reference numeral 32 denotes a concrete body in the upper stage. The locking projection 22 is housed in a concave portion chamfered when the upper concrete body 32 is connected, and after the concrete body is connected, the tool can be removed by removing the locking projection 22 from the concave portion. .

Although the concrete bodies 30 and 32 are combined with each other by engaging and recessing at the connecting portion, a gap is formed at the connecting portion because the concave groove 34 is filled with a sealing material such as mortar and connected. The thickness and length of the locking projection 22 may be set in consideration of the concave portion formed by chamfering the concrete body and the gap. The operation of removing the application tool after connecting the concrete body is very simple. Since the application tool is simply mounted by pressing the guide portion 20 against the inner wall surface of the concrete body, the tool can be easily removed by grasping the levers 14a and 14b and contracting the elastic body portion 10.

In the case where the concrete body is further connected to the upper stage, similarly to the above, a tool is installed at the opening of the connected and stacked concrete body, and the concrete is further connected to the upper stage by the guide portion 20 of the tool. The next concrete body should be suspended by guiding the inside of the body. In this way, a manhole made up of a plurality of segments can be assembled while the concrete bodies are aligned with each other by attaching the tool to the connecting portion.

[0021] The tool for assembling the manhole according to the present invention must be manually installed when installing the tool, but it is necessary to adjust the position of the connecting concrete body in the most dangerous work. Does not require a person to be in the manhole, making work extremely safe. In addition, since the tool is mounted on the inner wall surface of the concrete body by elastic contact with the telescopic body part 10, the attaching and detaching operations are extremely simple, easy to handle, and extremely efficient. Become. In addition, the concrete body can be connected with high precision by guiding and connecting the concrete body with the guide portion 20.

The guide portion 20 provided on the application tool guides the concrete body by contacting the inner surface of the concrete body connected to the upper stage, so that when connecting a straight tubular concrete body, as shown in FIG. When connecting a concrete body having an inclined inner surface, such as the uppermost concrete body 5c shown in FIG. 4, the guide portion 20 should follow the angle of these inner surfaces. It is necessary to use one that is inclined inward. Further, the dimensions and the like of the guide portion 20 may be appropriately set according to the product, and the guide portion 20 may be formed to have a certain length so that the guide action can be effectively performed.

In addition, since the ladder 36 for climbing and descending is provided on the inner wall surface in the manhole, the assembling type manhole is used as a mark of a place where the ladder 36 is provided when a tool is mounted. When connecting concrete bodies, it is also possible to use concrete bodies based on the applied tools.

In the above-described embodiment, the elastic body 10 is configured to be mounted by pressing the guide portion 20 against the inner wall surface of the concrete body by the biasing force of the resilient spring. Alternatively, an air spring or the like can be used. Instead of using the elastic force, a screw portion may be provided in the elastic body portion 10 so as to expand and contract using the action of the screw. For example, the outer peripheral surface of the small-diameter pipe 12a and the inner peripheral surface of the large-diameter pipe 12b are screwed together, and the guide portion 20 is attached to the ends of the small-diameter pipe 12a and the large-diameter pipe 12b so as to be freely rotatable. . By turning the small-diameter pipe 12a and the large-diameter pipe 12b, the total length of the elastic body 10 can be changed, and the guide 20 can be attached to the inner wall surface of the concrete body by abutting. Also in this case, the mounting and dismounting of the tool can be easily performed, and the installation work of the assembling manhole can be performed safely and efficiently.

[0025]

[Effect of the invention]

 According to the tool for the assembling manhole according to the present invention, as described above, the installation work of the assembling manhole can be performed extremely safely. In addition, the installation and removal of the application tool is extremely easy, and the work can be done efficiently, and the concrete body, which is the segment of the manhole, can be connected and assembled with high accuracy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tool for assembling a manhole according to the present invention.

FIG. 2 is an explanatory view showing a method of using a tool for assembling manholes.

FIG. 3 is an enlarged explanatory view showing a state in which a tool for assembling manholes is mounted on a concrete body.

FIG. 4 is a cross-sectional view showing an example of the structure of an assembling manhole.

[Explanation of symbols]

 5a, 5b, 5c Concrete body 10 Telescopic body part 12a, 12b Pipe 14a, 14b Lever 16 Guide body 20 Guide part 20a Curved part 22 Locking projection 30, 32 Concrete body 34 Groove 36 Ladder

Claims (3)

[Utility model registration claims] 1. An application tool used for constructing a manhole that is constructed by combining concrete bodies formed in a plurality of segments, wherein the tool is hung in a radial direction between inner wall surfaces at an opening of a connection portion of the concrete body. An elastic body part formed in a rod-like body, which is attached to pass over, and a plate-like body attached to each end of the elastic body part, with the upper part inward to guide the inner surface of the next concrete body A guide portion formed on the curved portion and having an outer surface provided with a locking projection locked on an upper edge of an inner surface of the opening of the concrete body. Tooling. 2. The method according to claim 1, wherein the expansion and contraction section has a biasing means for constantly resiliently biasing in a radial direction and biasing the guide section between inner wall surfaces of the concrete body. The tool for assembling a manhole according to claim 1. 3. A biasing means is provided in which the expansion / contraction part extrapolates a large-diameter pipe so as to be slidable on a small-diameter pipe and radially resiliently projects between the small-diameter pipe and the large-diameter pipe. 3. The tool for assembling a manhole according to claim 2, wherein a lever for sliding the small-diameter pipe and the large-diameter pipe relative to each other is attached to the small-diameter pipe and the large-diameter pipe.