Fall prevention devices for casing shafts, etc.

Abstract

To provide a fall prevention device which can assemble and raise fitting to excavation holes having different apertures by standardized components, and is easy to disassemble, organize and the like.SOLUTION: A fall prevention device of a casing shaft and the like comprises a plurality of frame bodies A for connection and a plurality of frame bodies B for adjustment, and has a constitution where the frame bodies B for adjustment are provided at end parts of the connected frame bodies for connection, and is assembled and raised surrounding an opening part of an excavation hole.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fall prevention device for a casing shaft or the like, which is installed around a casing shaft or other excavated hole to prevent workers from falling or tools from dropping. [Background technology]

[0002] Conventionally, fall prevention devices have been proposed to prevent workers and tools from falling into casing shafts and other excavated holes formed during foundation work, etc., by attaching a fall prevention guard fence directly to the liner plate. Other proposed fall prevention devices include a fall prevention net and baseboards that are created by creating a pipe formwork around the excavated hole.

[0003] In addition to the above proposal, a borehole fall prevention device has been proposed (Patent Document 1), which provides a base plate with a protruding receiving portion into which an ejection pin formed on a fall prevention panel surrounding the opening edge of the borehole is inserted and attached in a detachable manner from above, and which consists of a roughly flat base portion that can be attached to the top surface of a liner plate by screwing or the like, and the protruding receiving portion that can be attached to a horizontal connecting pipe of a pipe formwork type by a single pipe clamp that extends integrally from the base, and which can be used with both the liner plate type and the pipe formwork type by selecting the attachment means of the base plate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5569705

[0005] Each of the above methods is applied at each construction site, and each is intended to prevent workers and tools from falling. Summary of the Invention [Problem to be solved by the invention]

[0006] The object of the present invention is to provide a fall prevention device that can be easily assembled and erected using standardized components to suit casing shafts of different diameters and other excavated holes of different diameters, and that can also be easily dismantled and organized, preventing workers from falling and tools from falling. [Means for solving the problem]

[0007] The present invention, which achieves the above object, is a fall prevention device that is erected to surround the opening of an excavation hole, and is composed of a plurality of approximately rectangular connecting frames and an adjusting frame, each of which has a baseboard at its lower end, and the connecting frames are provided with connectors above and below one of the vertical frames that receive and fix the opposite vertical frame, and one of the vertical frames of the adjusting frame is attached to the vertical frame of the connecting frame, and the horizontal frame that forms the adjusting frame is It is slidable in the extending direction, The connecting frame member is provided with a vertical frame that intersects with the connecting frame member at the opposite position. and fixation It is characterized by being configured to be able to do so (Claim 1).

[0008] In the present invention having the above configuration, a plurality of connecting frames each having a length corresponding to the length required to surround the opening of the excavation hole are prepared and connected in sequence, and then a preparation frame is interposed between the ends of the connected frames.

[0009] The adjustment frame is such that one of the vertical frames forming the adjustment frame is A horizontal frame is attached to the vertical frame of the frame body and forms the frame body for adjustment. In that direction It is freely slidable, The connecting frame is connected to the vertical frame of the connecting frame at the opposite position. It is configured to be movable, slidable, and fixable.

[0010] The present invention is configured such that the plurality of connecting frame bodies and the adjusting frame body are assembled and erected in accordance with the opening of a casing shaft or other excavated hole.

[0011] According to the present invention, the components are standardized and can be easily assembled and erected according to the diameter of the excavated hole, and the handling such as dismantling and rearrangement is also easy.

[0012] One embodiment of the present invention is characterized in that a base plate that can be fixed to an installation surface is provided at the lower end of the vertical frame of the connecting frame body (claim 2). Specifically, a base plate having fixing holes or the like is provided.

[0013] According to one embodiment of this invention, the fall prevention device installed around the opening of the excavation hole is fixed to the installation surface and cannot be moved artificially or naturally, thereby preventing workers from falling or tools from dropping, thereby improving safety.

[0014] In one embodiment of the present invention, a connecting frame is provided between the connecting frame bodies. Workers' It is characterized by the provision of an entrance / exit (claim 3). In the embodiment in which the adjustment frame is provided, the adjustment frame can be used as an entrance / exit for workers. However, by providing an entrance / exit at a position that matches the working structure of the excavation hole, it becomes easier for workers to enter and exit the excavation hole. [Effects of the Invention]

[0015] According to the present invention, the casing is made of standardized components, which makes it easy to assemble and erect casing shafts of different diameters and other excavated holes, and is also easy to handle for disassembly and rearrangement, preventing workers from falling or tools from dropping. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view of a fall prevention device according to an embodiment of the present invention; [Figure 2] FIG. 2 is an enlarged perspective view of an adjustment frame portion of FIG. 1. [Figure 3] FIG. [Figure 4] This is a front view of the entrance / exit. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the present invention will be described below with reference to the drawings.

[0018] In the figure, A is the connecting frame, B is the adjusting frame, and C is the excavation hole and the cover.

[0019] The connecting frame A and the adjusting frame B are formed in a substantially rectangular shape, and for example, have a height of approximately 1100 mm and a width of approximately 750 mm. The size of each frame is optional. It is preferable that most of the frame members be made of pipe material to reduce weight.

[0020] As shown in Figure 3, the connecting frame A is made up of vertical frames 1a and 1b and horizontal frame 1c, with baseboard 1d attached to the lower end. Furthermore, base plates 3 that can be fixed to the installation surface are attached to the lower ends of the vertical frames 1a and 1b that make up the connecting frame A. In the figure, reference numeral 3a denotes fixing holes in base plate 3.

[0021] The adjustment frame B is Figure 2 As shown in FIG. 1, it is made up of vertical frames 2a and 2b and horizontal frame 2c, with baseboard 2d attached to the lower end.

[0022] In the present invention, a connector 4 is provided above and below one of the vertical frames 1a of the connecting frame body A to receive and secure the opposite vertical frame 1b, which in fact is the vertical frame 1b of the adjacent connecting frame body A that does not have a fastener.

[0023] In the illustrated embodiment, as shown in Fig. 3, the connector 4 is formed by fixing a single clamp T that receives and connects the opposite vertical frame 1b to the top and bottom of the one vertical frame 1a. Note that the connector 4 may also be a jig with a different structure.

[0024] Next, as shown in FIG. 2, one vertical frame 2a of the adjustment frame B is attached to one vertical frame 1a of the connection frame A, and the horizontal frame 2c forming the adjustment frame B is It is slidable in the extending direction,The connecting frame 1b is positioned opposite to the connecting frame A. and fixation Possibly configured.

[0025] In the illustrated embodiment, as shown in FIG. 2, a vertical frame 1b of the connecting frame body A is provided with a perpendicular clamp S, and a horizontal frame 2c that forms the adjusting frame body B is provided with a perpendicular clamp S. In that direction It is freely slidable, The fall prevention device is designed to be crossable and fixable, so that the overall length of the fall prevention device installed around the excavation hole can be adjusted.

[0026] In the drawing, D is an entrance / exit for workers provided between the connecting frames A, and is composed of a door 5 that can be opened and closed freely and a panel 6 that supports the door 5.

[0027] In the present invention having the above configuration, a plurality of connecting frames A are prepared and connected in order to form a length that is estimated to enclose the opening of the excavated hole. Then, a preparation frame B is provided between the ends of the connected connecting frames A and is installed around the casing shaft or other excavated hole.

[0028] As a result, workers and tools are prevented from falling, and because it is made up of standardized components, it is easy to assemble and erect to match the diameter of the casing shaft or other excavation hole, and it is also easy to dismantle and organize. [Explanation of symbols]

[0029] A. Frame for connection B Adjustment frame D Entrance 1d, 2d baseboard 3 Base plate 4 Connectors

Claims

1. A fall prevention device that is erected to surround the opening of an excavation hole, and is composed of a plurality of approximately rectangular connecting frame bodies and adjusting frame bodies, each of which has a baseboard at its lower end, and the connecting frame bodies have connectors above and below one vertical frame that receive and fix the opposite vertical frame, one of the vertical frames of the adjusting frame body is attached to the vertical frame of the connecting frame body, and the horizontal frame that forms the adjusting frame body is freely slidable in its extension direction, and is configured to be able to cross and be fixed to the vertical frame of the connecting frame body at the opposite position of the connecting frame body.

2. 2. The device for preventing a casing shaft or the like from falling as claimed in claim 1, wherein a base plate capable of being fixed to an installation surface is provided at the lower end of the vertical frame of the connecting frame body.

3. 2. The fall prevention device for a casing shaft or the like according to claim 1, characterized in that an entrance and exit for workers is provided between the connecting frame bodies.

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