JP2009097204A - Earth retaining frame connector and earth retaining frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably prevent panel collapse without entering an excavation hole or excavation groove, and to dismantle the earth retaining frame from the excavation hole after installing the septic tank and the buried pipe. A connecting tool used for assembling a retaining frame that can be quickly and smoothly completed by an operation from the above, and a retaining frame assembled using the connecting tool.
SOLUTION: A connector C for connecting a pair or two pairs of frames, which is used for maintaining a space between panel groups 10 erected on an opposing surface of a drilling hole, and each frame is provided at both longitudinal ends. The connecting parts 11 and 21 with the perforations 12 and 22 opened in the vertical direction are provided, and the connecting tool C is provided with the body parts 32 and 33 which are fitted to the perforations on the upper and lower sides of the flange part 31 between the upper and lower intermediate parts. A metal fitting body 3 having screwed screws 34 and 35 at the upper and lower ends, and connecting screws 4 and 5 screwed to the screwed screws 34 and 35.
[Selection] Figure 3

Description

  In the present invention, for example, when forming excavation holes for manholes or septic tanks, or excavation holes for laying cable protection pipes such as electric wires and communication lines, and water and sewage pipes, the excavation holes and excavation grooves are collapsed during operation. In order to prevent accidents and injuries caused by collapse, a connector for connecting a retaining frame that holds a panel (sheet pile) that stands up in its surroundings in an appropriate posture is used, and the connector is used. It is related with the frame for earth retaining assembled.

  Conventionally, excavation holes for burying manholes and septic tanks of this kind in the ground, and excavation grooves for laying pipes such as water and sewage pipes (unless there is a need for distinction below) First, the manhole installation location is excavated by the excavator such as a backhoe or excavator to form a shallow excavation hole, and a plurality of panel plates are sequentially formed on the four circumferences of the excavation hole. An earth retaining frame that has been assembled in advance into a square shape on the ground in a panel group wall that has been erected to form a digging hole of the required depth by digging deeper into the interior and forming a digging hole of the required depth. Suspend the body to the required height position of the lifting hole using an excavator such as an excavator, etc., extend the frame that can be adjusted in length (expandable) and apply it to the panel group wall, and earth and sand in the excavation hole To prevent the collapse of There.

  In such conventional manhole embedding work, in order to form a drilling hole of the size and depth required to embed the manhole, it is sure to protect the space between the left and right panel groups and between the front and rear panel groups. Because the operation to extend each frame to perform in the excavation hole, there is always a danger to the worker, and the work of preventing panel collapse as a safety measure requires a lot of work and greatly reduces the work efficiency It was a factor.

Therefore, the present applicant, as means for avoiding danger to the human body, as described in Patent Documents 1 and 2 below, an operator enters a drill hole for manhole installation or a drill groove for laying a laid pipe. The company has developed and received a patent for a telescopic frame having a structure that allows the frame constituting the earth retaining frame to be extended by an operation from the ground. In addition, as seen in Patent Document 3, an operating rod for manually operating the telescopic operation of the extendable frame from the ground has been developed and patented.
Japanese Patent No. 3015864 Japanese Patent No. 2913468 Japanese Patent No. 2869646

  The telescopic frame described in the cited document 1 has a structure in which an operation shaft that protrudes upward to the side of the frame is operated to rotate from the ground. The telescopic frame described in the cited document 2 is hydraulic or pneumatic. A jack that is operated with a fluid pressure as described above is incorporated in the frame, and the hoist of the hydraulic pump is connected to perform the expansion and contraction operation of the frame from the ground. Is a structure in which the operation shaft of the telescopic frame having the operation shaft described in the cited document 1 is rotated from the ground.

  The present invention uses such a frame that has already been proposed in advance, and allows the operator to enter and exit from the ground without entering the excavation hole or trench. The operation allows insertion of the retaining frame into the excavation hole and adjustment of the expansion and contraction, can reliably prevent the panel from collapsing, and dismantling the retaining frame from the excavation hole after installing the septic tank and the buried pipe Used for assembling earth retaining frames that can complete work quickly and smoothly by operating from the ground, eliminating the danger to workers and improving work efficiency. It is an object of the present invention to provide a connecting tool and a soil retaining frame assembled using the connecting tool.

The structure of the earth retaining frame body connector according to the present invention taken to achieve this object is a group of panels erected on two opposing surfaces or four rectangular surfaces of an excavation hole dug down the ground. Two-to-four frames 1, 1, 2, 2 including at least a pair of length-adjustable frames that are disposed on the inner surface of the panel 10 and are used to maintain the distance between the panel groups 10, 10. Is a connecting tool C for assembling and connecting to a rectangular shape,
Each of the frames 1 and 2 includes connecting portions 11 and 21 having perforations 12 and 22 that open vertically in both longitudinal ends.
The connector C includes body portions 32 and 33 which are fitted to the perforations 12 and 22 on the upper and lower sides of the flange portion 31 in the middle portion in the vertical direction, and have screwed screws 34 and 35 on both upper and lower ends thereof. Metal fitting body 3,
The screwing screws 34 and 35 and the connecting screws 4 and 5 screwed respectively are used.

In addition, the structure of the earth retaining frame using this connector is arranged on the inner surface of the panel group 10 erected on the two opposing surfaces or the four rectangular surfaces of the excavation hole dug down the ground. A frame comprising two pairs of four frames 1, 1, 2 and 2 including a frame which is assembled and connected in a square shape so as to maintain a gap between the groups 10 and 10, and at least one pair of which is adjustable in length. Because
Each frame 1, 2 is provided with connecting portions 11, 21 having perforations 12, 22 opening in the vertical direction at both longitudinal ends,
The upper body 32 and the lower body 33, which are connected to the upper and lower sides of the flange portion 31 formed in the intermediate portion in the vertical direction, in the metal fitting body 3 of the separately-installed retaining frame frame connector C, are formed by the perforation. 12 and 22, and the connecting portions 11 and 21 are connected to the flange portion by connecting screws 4 and 5 screwed into the screw screws 34 and 35 formed on the upper and lower ends of the body portions 32 and 33, respectively. 31 is fastened in the vertical direction using a spacer,
The four frames are assembled in a square shape.

The earth retaining frame connector according to the present invention is a connector for assembling and connecting two pairs of four frames including a frame whose length is adjustable at least in a pair,
Each frame is provided with a connecting portion having perforations that open in the vertical direction at both ends in the longitudinal direction, and the coupling tool is fitted to the perforations above and below the flange portion of the intermediate portion in the vertical direction. Each of the upper and lower ends of the metal fitting body and the connecting screws that are screwed with the screw screws, respectively. The upper body of the metal fitting body is connected to the lower body with the upper body of the metal fitting body protruding upward, and the other pair of frames protrudes upward. Since the perforations at both ends can be fitted and connected to the body, the assembly of the frame can be done easily and quickly, and the assembly frame body can be inserted into and extended from the excavation hole by lifting the frame from the ground. Although the adjustment can be performed quickly, even if the assembly frame cannot be lifted and lowered from the ground into the excavation hole due to a small construction site, the upper body A pair of frames with the part protruding upwards are individually suspended along the front of the panel group, and the other pair of frames are individually suspended on this frame to descend in advance. By connecting the frame with the operation from the ground and causing the panel group to be stretched, it is possible to reliably prevent the panel group from collapsing in all operations from the ground.

  In addition, under this state of preventing the panel from collapsing, the disassembly and lifting work from the excavation hole of the retaining frame after the installation work of the septic tank and the buried pipe is also carried out by the bolt loosening operation from the ground. By releasing and pulling up, the dismantling work of the frame can be completed quickly and smoothly, and the embedding work in the ground such as the septic tank can be efficiently completed while eliminating the danger to the operator. Can be expected.

  Further, the retaining frame according to the present invention is such that at least one of the frames constituting the frame can be adjusted in length, and each frame includes two pairs of four frames including this frame. It is assumed that there are connecting portions having perforations that open in the vertical direction at both ends in the longitudinal direction, and using these perforations, the flange portion formed in the middle portion in the vertical direction of the metal fitting body of the frame body connector, The upper body part and the lower body part connected in the vertical direction are fitted into the perforations, and the flange part is connected by screw connection with a connection screw for each screw screw formed on the upper and lower ends of these body parts. As the spacer, the connecting parts of the frames are fastened in the vertical direction so that the four frames can be assembled in a square shape. Therefore, a pair of frames with the upper body part of the metal fittings projecting upward at both ends. A small excavator such as an excavator or a backhoe or human power is used to suspend each frame and place it in the hole. Since it can be assembled and connected to a pair of frames, the panel group can be safely prevented from collapsing safely by operating from the ground even in a narrow construction site where a frame assembled in a square shape cannot be suspended in the hole. There is an advantage that can be. In addition, even in the dismantling work of the frame after installing the septic tank or the buried pipe in the hole, it is expected to have a great advantage that the frame can be individually disassembled and lifted by the bolt tightening release operation from the ground. It can be done.

  In practicing the present invention, the screw screws 34 and 35 formed on the upper and lower ends of the upper and lower body portions 32 and 33 of the metal fitting body 3 are formed as projecting bolts, and the screws fitted therewith are used as nuts. Can do. The earth retaining panel referred to in the present invention is not limited to a steel sheet pile, and may be made of aluminum or wood, and the material is not particularly limited. In addition, even in the component parts of the connector according to the present invention, not only ferrous metal, but also aluminum die-cast or other non-ferrous metals or synthetic resin molded products, or metal inserts molded with synthetic resin materials It may be a product.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show a first embodiment of the present invention. FIG. 1 is an exploded perspective view of the frame connector, FIG. 2 is an exploded side view of the connector, FIG. 3 is an exploded perspective view for explaining a connection means between the end structure of the frame and the connector, and FIG. FIG. 5 is a side view showing the connected state, FIG. 6 is a perspective view showing the assembled state of the frame, and FIG. 7 is a longitudinal section of the main part of the cylinder for explaining an example of the frame expansion and contraction structure. FIG.

  Thus, as shown in FIGS. 1 and 2, the frame connector C shown in the embodiment is roughly composed of three members, that is, the metal fitting body 3 and the connecting screws 4 and 5. The metal fitting body 3 shown in the embodiment is formed in a short cylindrical shape as a whole, and a concentric circular flange portion 31 is formed in a flange shape at an intermediate portion in the vertical direction. The body portions 32 and 33 are formed on the upper and lower sides of the flange portion 31, and a female screw is formed through the entire length thereof, and a screw screw 34 for inserting and screwing a bolt from the upper and lower ends. , 35. The connecting screws 4 and 5 are male screws that are screwed into the screwing screws 34 and 35.

  Needless to say, these threaded screws 34 and 35 may be male threads protruding vertically from the upper and lower body portions 32 and 33, and the connecting screws 4 and 5 may be female threads. Further, in this embodiment, a washer substitute is provided by interposing a cap nut 6, 7 having a shape covering the body portions 32, 33 between the upper and lower body portions 32, 33 and the connecting screws 4, 5. . For these cap nuts 6 and 7, a normal disk washer may be used, or a bolt with a washer may be used.

  The upper and lower body portions 32 and 33 shown in the embodiment are formed such that the diameter of the upper body portion 32 is smaller than the diameter of the lower body portion 33 and the upper end portion thereof is formed in a conical shape. By forming in this way, a pair of frames 1 or 2 to be described later is perforated 12 or 22 formed in the connecting portions 11 or 21 at both ends thereof, and the upper body 32 of the metal fitting body 3 is directed upward. In a state where the metal fitting body 3 is connected as a protruding state, it is lowered to a predetermined position in the excavation hole before the other pair of frames 2 or 1, and then the remaining pair of frames 2 or 1 is lowered, This is for facilitating the operation of fitting the perforations 22 or 12 at both ends to the upper body 32 and connecting them with bolts from the ground. In this structure, after the operation in the excavation hole is finished, the operation of releasing the bolt from the ground is also performed from the upper trunk portion 32 even when the connecting portions 11 and 21 individually pull the upper frame 1 or 2 to the ground. It is also designed so that it can be easily removed.

  The frame connector C of the present embodiment is formed as described above, and in order to connect the frames using this, as shown in FIG. The lower body portion 33 of the metal fitting body 3 is inserted into the perforation 22 of the connecting portion 21 on the high position side of the connecting portions 11 and 21 that are integrally projected in the horizontal direction at the end portions of 1 and 2. Then, the lower connection screw 5 is tightened and connected through the lower cap nut 7 from below. Since the upper trunk | drum 32 protrudes upwards at this time, the connection part 11 of the other flame | frame 1 is fall | descended from the upper direction, the perforation 12 and the trunk | drum 32 are fitted, and the upper cap nut 6 from the upper direction is fitted. Then, the upper and lower connecting screws 4 are tightened and connected. FIG. 5 shows an enlarged side view of the connecting portion.

  Similar operations are performed at the four corners, and as shown in FIG. 6, two pairs of frames 1, 1 and 2, 2 are assembled into a rectangular shape to form a square retaining frame. The earth retaining frame shown in FIG. 6 is often used for embedding manholes or septic tanks, for example, using two-to-four frames 1, 1 and 2, 2 having substantially the same length. A substantially square frame is shown.

  Thus, as an example of the frame structure that can be expanded and contracted according to the present invention, the internal structure of the fluid pressure utilization cylinder is illustrated for reference, as shown in FIG. The frame 1 is provided with suspension rings r, r for locking such as wires and ropes and nozzles n, n for connecting a fluid pressure hose such as hydraulic pressure near both ends in the longitudinal direction, and the fluid pressure is received by the piston p. It has a structure that expands and contracts its length. Needless to say, the expansion / contraction means is not limited to one using fluid pressure such as hydraulic pressure, and may be, for example, an expansion / contraction mechanism by rotation of the screw shaft described in the cited document 1.

  FIG. 8 shows that the length of the pair of frames 1 and 1 is different from the length of the other pair of frames 2 and 2 out of the two pairs of frames 1, 2, and 2. The frame in the case of obtaining is illustrated. The frame shown in FIG. 6 and the frame shown in FIG. 8 are shown as two-to-four frames 1, 1, 2, and 2 having a telescopic structure. When used in a digging groove formed at the time of embedment of a pipe, any pair of frames can be prevented from expanding and contracting.

  FIGS. 9 and 10 are explanatory views of the erection holder for supporting the erection frame, in which the erection frame having a plurality of bracket retaining holes h formed at predetermined intervals in the vertical direction of the long channel steel material. The holder H is formed and hooked to an appropriate panel 10a of the preceding placement panel group 10 by using a bracket b for hanging on the downward U-shaped sheet pile connected and fixed to the upper end of the holder H. A U-shaped frame receiving bracket B that is suspended along the inner surface and engaged with a bracket retaining hole h having an appropriate height selected in advance is protruded into the excavation hole. Similarly, another frame holder H is suspended from the panel group 10 on the same surface at a predetermined interval, and the frame receiving bracket B is projected. A frame suspended from the ground is supported on the frame receiving brackets B and B. In the same manner, the two brackets B and B are protruded from the opposing panel group 10 and the frame is suspended and placed. Subsequently, on the connecting portions protruding from both ends of the pair of frames, the connecting portions of the other pair of frames are respectively placed, and the overlapping portions are screw-connected by an operation from the ground. Assemble the frame inside the excavation hole.

  FIGS. 11 and 12 show another embodiment of a tightening screw that is screwed into the metal fitting body 3, and the tightening screws 41 and 51 shown in the embodiment are substantially the same. The nuts 61 and 71 having a bag shape corresponding to the cap nuts 6 and 7 described as the examples are molded products of synthetic resin, and the metal bolts 42 and 52 are insert-molded during the molding. As shown in FIG. 12, the screws 41 and 51 are formed as hexagonal nuts with the heads 62 and 72 protruding upward, and the cap nuts 61 and 71 are also square nuts so that they can be loosened with a square wrench. It is molded into

  FIGS. 13 and 14 show a fastening screw having a different structure, and the fastening screw 43 of FIG. 1 has the connecting screw 4 shown in the first embodiment with a small diameter at the lower part of the head. The part 4a is formed, and the disk washer 6a is fitted to such an extent that it does not fall easily in the inner part of the cap nut 6 so that the connecting screw 4 and the cap nut 6 are in an unseparated state. . The tightening screw 44 shown in FIG. 14 is a bolt with a washer in which the connecting screw portion and the washer portion are integrated with the connecting screw 4 shown in the first embodiment. Such a bolt can also be used as the connecting screw.

  FIGS. 15 and 16 show other embodiments of the connector, respectively. In the connector of FIG. 15, only the lower body portion 33 of the metal fitting body 3 in the connector shown in the first embodiment has a prismatic shape. In addition, the perforation 22 of the lower connecting portion 21 that fits with the lower body portion 33 is also a square hole, and acts to prevent the lower body portion 33 from rotating, so that the connection screw 4 is fastened and relaxed to the upper body portion 32. In this configuration, the joint body 3 is prevented from co-rotating. The connecting tool shown in FIG. 16 is such that the upper and lower body portions 32 and 33 are prismatic shapes, and the shape of the perforations 12 and 22 formed in the connecting portions 11 and 21 of the frame is also a square hole that fits into each other. It is. However, a clearance between the upper square hole and the prism of the upper body 32 is allowed in the axial circumferential direction so that it does not hinder the expansion and contraction operations of the frames 1 and 2. Is preferred.

  Although the embodiments of the present invention have been described above, the present invention is not limited only to the structures shown in these embodiments, and includes the above-described configuration requirements, achieves the above-described object, and achieves the above-described effects. Modifications can be made as appropriate within the range provided.

  As described above, the present invention can assemble and dismantle the retaining frame very easily. In addition to assembling each frame on the ground, each frame is individually suspended in the excavation hole to operate from the ground. Can be assembled in the excavation hole, and after embedding the required products, it can be dismantled from the ground without entering the excavation hole, so it is expected to be used greatly in this kind of construction .

The disassembled perspective view of a frame coupling tool. The exploded side view of the connector. The disassembled perspective view explaining the connection means of a frame. The perspective view which shows the connection state of frames. The side view which shows the connection state. The perspective view which shows the assembly state of a flame | frame. The longitudinal cross-sectional view explaining the expansion-contraction structure example of a flame | frame. The perspective view which shows a rectangular frame. The perspective view which shows an erection holder. The perspective view which shows the use condition of an erection holder. The longitudinal cross-sectional view which shows the bolt which carried out insert molding. The top view of the volt | bolt of FIG. The longitudinal cross-sectional view which shows the fastening screw of another structure. Furthermore, the perspective view which shows the fastening screw of another structure. The perspective view which showed another Example of the coupling tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame 10 Panel group 10a Panel 11 Connection part 12 Perforation 2 Frame 21 Connection part 22 Perforation 3 Metal body 31 Flange part 32 Upper trunk | drum 33 Lower trunk | drum 34 Screw screw 35 Screw screw 4 Connection screw 5 Connection screw 6 Cap nut 7 Cap nut C Connector n Air nozzle r Suspension ring

Claims (2)

It is arranged on the inner surface of the panel group (10) erected on the two opposing or four rectangular faces of the excavation hole that has dug down the ground, and is used to maintain the spacing between the panel groups (10, 10). A connecting tool (C) for assembling and connecting two pairs of four frames (1, 1) (2, 2) including at least a pair of length-adjustable frames,
Each of the frames (1, 2) includes a connecting portion (11, 21) having perforations (12, 22) opening in the vertical direction at both ends in the longitudinal direction,
The connector (C) includes a body portion (32, 33) fitted to the perforation (12, 22) above and below the flange portion (31) of the intermediate portion in the vertical direction, and at both upper and lower end portions thereof. A metal fitting body (3) having threaded screws (34, 35);
A retaining frame frame connector comprising the screw screws (34, 35) and the connecting screws (4, 5) screwed together.
A method for maintaining the space between the panel groups (10, 10), which is arranged on the inner surface of the panel group (10) standing upright on the two facing or four rectangular faces of the excavation hole dug down the ground A frame composed of two pairs of four frames (1, 1) (2, 2) including at least a pair of frames whose lengths are adjustable, which are assembled and connected in a shape;
Each frame (1, 2) includes a connecting portion (11, 21) having perforations (12, 22) opening in the vertical direction at both ends in the longitudinal direction,
The upper body part (32) and the lower part connected to the upper and lower sides of the flange part (31) formed in the intermediate part in the vertical direction in the metal fitting body (3) of the separately formed earth retaining frame connector (C) The body part (33) is fitted into the perforations (12, 22) and is connected to the respective threaded screws (34, 35) formed on the upper and lower ends of the body part (32, 33). By means of screws (4, 5), the connecting part (11, 21) is fastened in the vertical direction with the flange part (31) as a spacer,
The earth retaining frame in which the four frames are assembled in a square shape.

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