JP3233697U - Rotating adapter for underground pile excavation casing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary adapter for an underground pile circumference excavation casing for safely and surely excavating an underground pile circumference. SOLUTION: A rotary adapter for an underground pile peripheral excavation casing is provided with an upper adapter 20 having a hole, a casing drive device connecting portion 10 provided at the upper end, and a stopper on the side surface so as to be obliquely downward. The lower adapter 30 is provided. In the lower adapter, a hexagonal hole is provided inside the lower part, the upper adapter and the lower adapter are rotatably supported by each other using the hole, an engaging body having an orthorhombic convex portion is provided, and the engaging body is attached to the upper adapter. The shaft is rotatably supported. When a spring is provided between the engaging body and the upper adapter to urge the engaging body end with respect to the upper adapter in the direction in which the engaging body end always faces the upper adapter, and the position of the lower adapter with respect to the upper adapter becomes a straight line. In addition, rotation is blocked. [Selection diagram] FIG. 14

Description

The present invention relates to a rotary adapter used attached to a casing for excavating an underground pile circumference.

Conventionally, there are various means for excavating the underground pile circumference, but as shown in the present invention, there is currently no means for using a dedicated adapter for the underground pile circumference excavation casing.

The above-mentioned conventional means combines a casing drive device (an electric motor, a hydraulic motor, or the like with a speed reducer in which a gear is combined to increase the torque applied to the underground pile circumference excavation casing and decrease the number of rotations of the casing. A commercially available product configured as described above is attached to the end of an underground pile peripheral excavation casing (hereinafter abbreviated as casing), the casing is erected on the ground, and the casing drive device is rotated for excavation. It has the following problems. The above-mentioned work is roughly divided into a ground group and a high place group.
Groundwork: (Connect the casing drive device with the casing placed horizontally)
1. 1. When the casing and the casing drive device are connected horizontally and when the machine body raises the casing, a large load is applied to the connection portion between the casing and the casing drive device, so that the connection portion may be damaged.
2. It is difficult to connect the casing drive device horizontally to the casing, and this work depends on the skill of the operator.

High-altitude assembly: (After erecting the casing using heavy machinery, connect the casing drive device)
When connecting the casing to the casing drive device at a high place, when driving the joint pin to prevent it from coming off, the aerial work platform must use equipment such as a safety ladder, which increases the cost. There is a danger associated with working at height. In view of the above, this proposal was devised for the purpose of providing a means for performing excavation work safely and reliably.

This proposal has the following structure as a means to solve the problems. That is,
An upper adapter having a hole is provided, a casing drive device connection portion is provided at the upper end of the adapter, a stopper is provided on the side surface of the adapter in an oblique direction downward, a lower adapter having a hole is provided, and the lower adapter is provided with a lower portion. A hexagonal hole is provided inside, a stopper is provided on the side surface of the lower adapter in an oblique direction downward, and the upper adapter and the part adapter are rotatably supported by each other using the above holes, while having an oblique convex portion. An engaging body is provided, the engaging body is rotatably supported on the upper adapter by appropriate means, and a spring is provided between the engaging body and the upper adapter so that the engaging body end is always engaged with respect to the upper adapter. When the united end is urged toward the upper adapter and the position of the lower adapter with respect to the upper adapter is in a straight line, the stopper provided on the lower adapter engages with the oblique convex portion of the engaging body, and the upper adapter is also used. The stopper provided on the lower adapter and the stopper provided on the lower adapter come into contact with each other to prevent the lower adapter from rotating with respect to the upper adapter.
The present proposal is a rotary adapter for an underground pile perimeter excavation casing having the above configuration.

This proposal has the following effects.
1. 1. By using a rotary adapter that is a combination of the upper adapter and the lower adapter, the casing in the horizontal state is raised and put into the vertical state, so that the load applied to this connection portion can be reduced as compared with the conventional method. Therefore, it is possible to prevent damage to the connection portion, which is common in the conventional method.
2. Since the casing drive device and the connection portion are inserted and locked in the vertical state, the work can be performed safely and reliably without being influenced by the skill of the heavy equipment operator.
3. 3. Before the casing is raised by using the adapter, the casing and the casing drive device are connected, and the casing drive device and the casing are automatically locked when the casing is vertical, so that the risk of work can be avoided.

Explanation of the procedure for underground pile excavation method of the conventional example (ground structure) Top view of the lower adapter of the present invention Front view of the lower adapter of the present invention Bottom view of the lower adapter of the present invention Top view of the upper adapter of the present invention Front view of the upper adapter of the present invention Top view of the engaging body used in the present invention Front view of the engaging body used in the present invention Bottom view of the engaging body used in the present invention Built-in phase diagram of the adapter of the present invention (when the engaging body is not engaged) Built-in phase diagram of the adapter of the present invention (when the engaging body is not engaged) Built-in phase diagram of the adapter of the present invention (when the engaging body is engaged) Explanatory drawing of the main part of the adapter of the present invention (when not engaged) Explanatory drawing of underground pile excavation procedure using the adapter of the present invention Explanatory drawing of the main part of the underground pile excavation of the conventional example

Hereinafter, embodiments of the present invention will be described.
First, the conventional means will be described. 1 and 15 show conventional groundwork means. In the figure, reference numeral 1 denotes a casing, which is a long cylinder, and a plurality of square holes 2 penetrating the side surfaces thereof are provided on both side surfaces. Reference numeral 3 denotes a blade portion provided at the end of the casing, which is a portion in which a plurality of convex portions are provided evenly. Reference numeral 4 denotes a connection portion with the drive device for the casing, which is a perforated hexagonal prism and is projected vertically to the other end of the casing, and a perforated plate body is fixed to the end of the casing for this protrusion. ..

FIG. 1A shows a state in which the casing is laid on the ground and placed on a predetermined long wooden prism 5 placed on the ground. Since the casing is tubular, it is stably placed. A wedge 6 for use is driven between the casing and the prism. Reference numeral 10 denotes an existing casing drive device.
This casing drive device has a universal joint type member 11 at its upper part, a cylindrical part at its lower part, and a hexagonal hole extending from the lower end to the middle thereof, and two joint pins on its side surface. The hole 12 is drilled. A semi-circular recess 13 is provided on the side surface of the connection portion 4 described above.

The casing drive device is inserted into the connection portion 4, but this insertion is possible because the outer shape of the connection portion and the hexagonal hole inner shape of the casing drive device are approximately the same size. At the time of insertion, the positions of the joint pin hole described above and the semicircular recess coincide with each other, and the joint pin (not shown) is inserted here and both are fixed. A pore is formed in the vicinity of the end of the joint pin, and a split pin or the like is inserted into the pore to prevent the joint pin from being inadvertently dropped.

Groundwork procedure:
(A) As described above, the casing is placed lying on the ground.
(B) Bring the casing drive device suspended by the heavy machine close to the connection part, place the lower end of the casing drive device on the connection part end, tilt the casing drive device by operating the heavy machine, and use the skill to reach the connection part. Insert the casing drive device.
(C) Insert the joint pin and insert the retaining pin into the joint pin.
(D) Raise the casing by operating heavy machinery.
(E) The casing is rotated to perform excavation work.
(F) The casing enters the ground, and the circumference of the underground pile and the underground surface are separated.
After that, the casing is removed from the ground, the sling wire is hung on the underground pile, and the underground pile is removed by operating a heavy machine.
The above is the outline of the conventional construction method.

Apart from this, there is a means of assembling at high places. In the case of a high place assembly, as shown in Fig. 1 (a), a sling wire is used for the casing laid on the ground, this wire is fixed to the casing, and this casing is vertically raised by heavy machinery operation to drive the casing. Drop the device into the connecting part from above and fix it with the joint pin. Since this fixed position is a high place on the ground, it is necessary to use an aerial work platform or a safety ladder as described above, but the former is costly and the latter is dangerous.

Next, the present invention will be described. In the figure, 20 is an upper adapter and 20 is a lower adapter, which are used in combination with each other. Reference numeral 21 denotes a metal cylinder whose upper part is mainly formed and whose upper part is partially closed by a flat plate. Reference numeral 22 denotes a casing drive device connecting portion having a hexagonal column erected on the upper surface of the upper main body, and 23 is a center ring body integrally formed on the lower surface of the upper main body. 24 is an arm projecting to the side of the center ring, 25 is a hole drilled in the arm, and 26 is a stopper obliquely projecting to the side of the center ring, which is a substantially square columnar body and has a length thereof. The width is larger than the center ring width and is the same as the side ring width described later. The above is the configuration of the upper adapter.

Next, the lower adapter will be described. Reference numeral 31 denotes a lower main body, which is a metal cylinder having a predetermined length. Reference numeral 32 denotes a hexagonal hole provided in the lower part of the lower main body, and 33 is a side ring, and a pair is provided in the upper part of the lower main body at a distance from each other. Reference numeral 34 denotes a stopper, which is similar to the stopper 26 and is provided so as to project slightly downward from the side surface of the side ring.
The above is the configuration of the lower adapter.

Next, the engaging body 40 will be described. Reference numeral 41 denotes a main plate, which is a rectangular plate having a predetermined thickness, and a rectangular gap portion 42 is provided in a part thereof. Reference numeral 43 denotes an orthorhombic convex portion, which, as shown in FIG. 8, is a portion that protrudes obliquely upward from the tip end to the rear end of the main plate. Reference numeral 44 denotes a stay, which is a pair of plates projecting from the upper surface of the main plate, each having a hole 45. The above upper adapter, lower adapter and engaging body are combined and pivotally supported as follows.

As shown in FIGS. 10 to 12, the center ring of the upper adapter is inserted into the side ring of the lower adapter and rotatably supported by the center shaft 50. Stop plates 51 of small square plates are fixed to both ends of the center shaft to prevent the shaft from falling off.
Further, the hole of the arm coincides with the hole of the engaging body, and the engaging body is rotatably supported with respect to the arm via the shaft 52. Reference numeral 54 denotes a spring shaft, which is projected on the side surface of the upper main body. Reference numeral 55 denotes a spring holding cylinder, one end of which is fixed to the engaging body. Reference numeral 56 denotes a compression coil spring, which is provided with a spring shaft and a spring holding cylinder internally positioned between the upper main body side surface and the engaging body. The above configuration is the main configuration of the present invention.

Next, the operation of this proposal will be described.
The state of FIG. 10 shows an initial position in which the lower adapter projects at a right angle to the left with respect to the upper adapter. The lower main body can rotate about the center axis with respect to the upper main body, and when the lower main body end is moved downward, the lower main body rotates and changes to the position shown in FIG. That is, the lower main body end gradually moves downward, and eventually the oblique surface of the obliquely convex portion of the engaging body comes into contact with the end of the stopper 34. When the rotation is continued, the stopper end pushes up the oblique convex portion and reaches the vertical surface of the oblique convex portion, and the stopper fits in as shown in FIG. At this time, the stopper 34 comes into contact with the stopper 26 and the rotation is stopped. This is the state shown in FIG.

In this state, since the vertical surface of the orthorhombic convex portion is in contact with the stopper 34, the return to the initial state in which the lower adapter projects laterally is prevented. The engaging body is always urged by the repulsive force of the spring toward the lower end of the engaging body toward the lower adapter, so that the position of the engaging plate in FIG. 12 is maintained. The vicinity of the tip of the spring shaft is located inside the vicinity of the tip of the spring holding cylinder, and from this positional relationship, the spring holding cylinder slides in parallel with the spring shaft in response to the position change due to the rotation of the engaging body. The compression coil spring can expand and contract stably. In order to return the state of FIG. 12 to the state of FIG. 10, by pressing the upper side surface of the engaging body, the engagement of the oblique convex portion with respect to the stopper 34 is released, so that the lower main body with respect to the upper main body is released. It can rotate.

Further, perforated U-shaped water pipe holders 60 and 61 are projected from the upper main body and the lower main body, respectively, and a water pipe 62 made of a flexible synthetic resin pipe is connected to the water pipes 62 between the holders.
As shown in FIG. 5, the casing drive device connection portion is provided with a hole in the center, from which water is supplied to the water pipe holder by connecting the pipe body (not shown). The supplied water reaches the water pipe holder 61 from the water pipe holder 60 via the water pipe 62, and is ejected from the hole on the side surface of the lower main body.
Since the ejected water is provided with a hole in the center of the connection portion 4 with the casing drive device, it can fall from this hole to reach the excavation point and be excavated smoothly. The water supply to the water pipe holder is handled by a known technique so that the external supply pipe is not twisted due to the rotation of the casing.

The present invention has been described above, but the present invention can avoid damage and danger of excavation work, which has been a problem in the conventional method. In this proposal, the adapter and casing of this proposal are automatically locked when the casing is vertical, so there is no work risk unlike the conventional method in which a person works at a high place. The square holes in the casing are for releasing the pressure inside the casing during excavation. Further, the above-mentioned example is an example of implementation, and may be another configuration of approximation. As described above, the present invention makes it possible to obtain a rotary adapter for an underground pile perimeter excavation casing having various advantages.

1 Casing 2 Square hole 3 Blade part 4 Connection part 10 Casing drive device 11 Universal joint member 12 Joint pin hole 13 Semi-circular recess 20 Upper adapter 21 Upper main body 22 Casing drive device connection part 23 Center ring 24 Arm 25 Hole 26 Stopper 30 Lower adapter 31 Lower main body 32 Hexagonal hole 33 Side ring 34 Stopper 40 Engagement body 41 Main plate 42 Void part 43 Oblique convex part 44 Stay 45 Hole 50 Center shaft 51 Stop plate 52 Shaft 53 Stop plate 54 Spring shaft 55 Spring holding Cylinder 56 Compression coil spring 60 Water pipe holder 61 Water pipe holder 62 Water pipe

Claims (1)

An upper adapter having a hole is provided, a casing drive device connection portion is provided at the upper end of the adapter, a stopper is provided on the side surface of the adapter in an oblique direction downward, a lower adapter having a hole is provided, and the lower adapter is provided with a lower part. A hexagonal hole is provided inside, a stopper is provided on the side surface of the lower adapter in an oblique direction downward, and the upper adapter and the part adapter are rotatably supported by each other using the above holes, while having an oblique convex portion. An engaging body is provided, and the engaging body is rotatably supported on the upper adapter by appropriate means, and a spring is provided between the engaging body and the upper adapter so that the engaging body end is always engaged with respect to the upper adapter. When the united end is urged toward the upper adapter and the position of the lower adapter with respect to the upper adapter is in a straight line, the stopper provided on the lower adapter engages with the oblique convex portion of the engaging body, and the upper adapter is also used. A rotary adapter for an underground pile perimeter excavation casing, which is configured so that the stopper provided in the above and the stopper provided in the lower adapter come into contact with each other to prevent the lower adapter from rotating with respect to the upper adapter.

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