JP2021050573A - Pipe pushing device for propulsion laying method, and propulsion laying method using the same - Google Patents

Abstract

To provide a pipe pushing device for a propulsion laying method that does not generate operation noise and is easily disassembled and assembled.SOLUTION: Fixed pipe body support parts and a movable pipe body support part support a new pipe, and a drive part includes a gear and operation parts for rotating the gear. The drive part drives a pushing part along the pipe axis direction in accordance with the operation of the operation part, and the pushing part pushes in the new pipe from the rear side.SELECTED DRAWING: Figure 1

Description

In the present invention, the pipes joined by fitting the insertion port of the trailing pipe into the receiving port of the leading pipe are sequentially pushed into the sheath pipe laid in the ground in advance, and the new pipe is laid in the sheath pipe. It relates to a pipe pushing device for the propulsion laying method, which is used in the type of propulsion laying method and pushes a new pipe into a sheath pipe.

In recent years, there have been few problems such as traffic obstacles due to road construction and disposal of excavated soil, and a pipe-type propulsion laying method has been implemented that allows pipes to be laid even in places where excavation work cannot be performed, such as under tracks. There is.

In the sheath pipe type propulsion laying method, new pipes are sequentially pushed from the starting shaft side toward the reaching shaft, but as a pipe pushing device for the propulsion laying method that pushes the new pipe in the starting shaft, for example, the pushing device described in Patent Document 1. There is (called "conventional push-in device").

Conventional pushing devices include a propulsion trolley that can move back and forth along a rail provided on the machine frame, a wire rope that pulls the propulsion trolley forward, a movable pulley and a fixed pulley on which the wire rope is hung, and the movable pulley. It is provided with a fluid cylinder that moves the pulley in the front-rear direction, and the movable pulley is moved by the extension of the fluid cylinder to pull the wire rope hung on the movable pulley, and the propulsion trolley is advanced to advance the propulsion trolley. Press and propel the pipe with.

Japanese Unexamined Patent Publication No. 2001-349177

However, since a conventional pushing device requires a power source for operating a fluid cylinder (for example, a hydraulic cylinder), there is a problem that the operating noise affects the surrounding environment, especially in nighttime construction and the like. Further, since the fluid cylinder is a heavy object, there is a problem that the entire device becomes large and heavy when the fluid cylinder is incorporated, and the transportation of the device and the handling at the site become large. Further, when the fluid cylinder is incorporated into the device at the site, there is a problem that it takes time to disassemble and assemble because high-precision work is required at that time.

Therefore, an object of the present invention is to provide a lightweight pipe pushing device for a propulsion laying method that does not generate an operating noise and is easy to disassemble and assemble.

The present invention has been made to achieve the above object, and is characterized by the following.

The invention according to claim 1 is a pipe pushing device for the propulsion laying method used when pushing the new pipe into the sheath pipe in the propulsion laying method for laying the new pipe in the sheath pipe, and is the bottom of the starting shaft. A base installed in the base, a fixed pipe support portion fixed to the base and supporting the new pipe, and a movable portion that supports the new pipe and can move along the pipe axis direction of the new pipe. A push-in part that pushes at least one of the new pipe and the movable pipe support part from the rear along the pipe axis direction, and an operation part for rotating the gear and the gear. It is characterized by including a drive unit for driving the push-in portion along the pipe axis direction in response to an operation on the operation unit.

The invention according to claim 2 is the pipe pushing device for the propulsion laying method according to claim 1, wherein the drive unit includes a rack fixed to the base along the pipe axis direction and the pushing. It has a pinion which is a gear and is fixed to the operation part and the operation part, and the pinion meshes with the rack and rotates to drive the pushing part along the pipe axis direction. It is a feature.

The invention according to claim 3 is the pipe pushing device for the propulsion laying method according to claim 1, wherein the driving portion includes a rack included in the pushing portion along the pipe axis direction and the base. The pinion, which is a gear, is fixed to the operation unit, and the pinion meshes with the rack and rotates to drive the push-in portion along the pipe axis direction. And.

The invention according to claim 4 is the pipe pushing device for the propulsion laying method according to claim 1, wherein the driving part is in the direction of the pipe axis instead of the nut included in the pushing part and the gear. It has a feed screw fixed to the base along the base, and the feed screw meshes with the nut and rotates to drive the push-in portion along the pipe axis direction. ..

The invention according to claim 5 is the pipe pushing device for the propulsion laying method according to any one of claims 1 to 4, wherein the new pipe and at least one of the movable pipe body support portions are used. , It is sandwiched between the push-in portion and moves along the pipe axis direction, and when the push-in portion is driven, at least one of the new pipe and the movable pipe body support portion is pushed from behind. It is a relay member and is characterized by including a removable relay member.

The invention according to claim 6 is the pipe pushing device for the propulsion laying method according to any one of claims 1 to 5, wherein the legs supporting the base are provided with height adjusting means. It is a feature.

The invention according to claim 7 is the pipe pushing device for the propulsion laying method according to any one of claims 1 to 6, wherein the driving portion moves the pushing portion forward along the pipe axis direction. The first new pipe is pushed in by driving the new pipe, and then the pushed portion is driven rearward along the direction of the pipe axis, and the fixed pipe support portion and the movable pipe support portion are driven by a second. After supporting the new pipe, the push-in portion is driven forward along the pipe axis direction to join the receiving port of the first new pipe and the insertion port of the second new pipe. It is characterized by letting it.

The invention according to claim 8 is the pipe pushing device for the propulsion laying method according to claim 7, and when the receiving port and the insertion port are joined, the first new pipe is pushed into the sheath pipe. It is characterized by including a removable stopper that prevents the device from being damaged.

According to the present invention, since the new pipe is pushed by using a gear that does not use a power source, no operating noise is generated and there is no influence on the surrounding environment. In addition, since it does not use a drive device such as a cylinder, it is lightweight and the device can be easily disassembled and assembled.

(A) is a plan view which shows the pipe pushing device for a propulsion laying method which concerns on this embodiment. (B) is a side view showing a pipe pushing device for a propulsion laying method according to this embodiment. (A) is a rear view which shows the pipe pushing device for the propulsion laying method which concerns on this embodiment. (B) is a cross-sectional view taken along the line AA of the pipe pushing device for the propulsion laying method according to the present embodiment. (C) is a cross-sectional view taken along the line BB of the pipe pushing device for the propulsion laying method according to the present embodiment. (A) is a side view of the movable pipe body support part which concerns on this embodiment. (B) is a front view of the movable pipe body support part which concerns on this embodiment. (A) is a front view of the stopper according to this embodiment. (B) is a side view of the stopper according to this embodiment. It is sectional drawing (side surface) of the shaft when the pipe pushing device for the propulsion laying method which concerns on this embodiment is installed in a starting shaft. It is sectional drawing (back side) of the shaft when the pipe pushing device for the propulsion laying method which concerns on this embodiment is installed in a starting shaft. (A) is a cross-sectional view (side surface) of a shaft when the first new pipe is placed on the pipe pushing device for the propulsion laying method according to the present embodiment. (B) is a cross-sectional view (side surface) of a shaft when the first new pipe is placed on the pipe pushing device for the propulsion laying method according to the present embodiment. (C) is a cross-sectional view (side surface) of a shaft when the first new pipe is pushed by the pipe pushing device for the propulsion laying method according to the present embodiment. (A) is a cross-sectional view (side surface) of a shaft when a second new pipe and a stopper are placed on the pipe pushing device for the propulsion laying method according to the present embodiment. (B) is a cross-sectional view (side surface) of a shaft when a second new pipe and a stopper are placed on the pipe pushing device for the propulsion laying method according to the present embodiment. (C) is a cross-sectional view (side surface) of a shaft when joining the first new pipe and the second new pipe. (A) is a cross-sectional view (side surface) of a shaft when the stopper is removed from the pipe pushing device for the propulsion laying method according to the present embodiment. (B) is a cross-sectional view (side surface) of a shaft when a second new pipe is pushed into the pipe pushing device for the propulsion laying method according to the present embodiment. (C) is a cross-sectional view (side surface) of a shaft when a second new pipe is pushed by the pipe pushing device for the propulsion laying method according to the present embodiment. (A) is a cross-sectional view (side surface) of a shaft when the first long new pipe is placed on the pipe pushing device for the propulsion laying method according to the present embodiment. (B) is a cross-sectional view (side surface) of a shaft when the first long new pipe is pushed by the pipe pushing device for the propulsion laying method according to the present embodiment. (C) is a cross-sectional view (side surface) of a shaft showing a positional relationship when a second long new pipe is placed on the pipe pushing device for the propulsion laying method according to the present embodiment. (A) is a cross-sectional view (side surface) of a shaft when a relay member is placed on the pipe pushing device for the propulsion laying method according to the present embodiment. (B) is a cross-sectional view (side surface) of a shaft when the first long new pipe is pushed by using a relay member in the pipe pushing device for the propulsion laying method according to the present embodiment. (C) is a cross-sectional view (side surface) of a shaft when a second long new pipe is placed on the pipe pushing device for the propulsion laying method according to the present embodiment. (A) is a plan view which shows the first modification of the pipe pushing device for a propulsion laying method which concerns on this embodiment. (B) is a side view showing the first modification of the pipe pushing device for the propulsion laying method according to the present embodiment. (A) is a rear view which shows the first modification of the pipe pushing device for the propulsion laying method which concerns on this embodiment. (B) is a cross-sectional view taken along the line CC of the first modification of the pipe pushing device for the propulsion laying method according to the present embodiment. (C) is a DD cross-sectional view of the first modification of the pipe pushing device for the propulsion laying method according to the present embodiment. (A) is a plan view which shows the 2nd modification of the pipe pushing device for the propulsion laying method which concerns on this embodiment. (B) is a side view which shows the 2nd modification of the pipe pushing device for the propulsion laying method which concerns on this embodiment. (A) is a rear view which shows the 2nd modification of the pipe pushing device for the propulsion laying method which concerns on this embodiment. (B) is a cross-sectional view taken along the line EE of a second modification of the pipe pushing device for the propulsion laying method according to the present embodiment. (C) is a cross-sectional view taken along the line FF of a second modification of the pipe pushing device for the propulsion laying method according to the present embodiment.

Next, an embodiment of the pipe pushing device for the propulsion laying method of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 3, the pipe pushing device 1 for the propulsion laying method (hereinafter referred to as the pushing device 1) according to the present embodiment is a base having a leg portion 3 composed of four legs and a base portion 4. Includes a base 2, a fixed tube support portion 6, a movable tube body support portion 7, a push portion 8, an operation portion 9, a drive guide portion 10, a rack support portion 11, and a rotating shaft 12. Consists of. The left direction in FIG. 1A corresponds to the front direction for the pushing device 1 because the pushing device 1 pushes the new pipe. Further, the front and rear of the pushing device 1 correspond to the pipe axis direction of the newly installed pipe. Hereinafter, the description will be made on the premise of this.

The leg portion 3 is provided with a height adjusting portion 5. As the height adjusting unit 5, a conventionally known technique capable of expanding and contracting the legs to an arbitrary length can be adopted. As a result, the posture of the pushing device 1 can be adjusted, and the pushing device 1 can be stably installed even if the bottom of the starting shaft is uneven.

The base portion 4 functions as a base on which the movable pipe body support portion 7 moves (runs), and extends in the front-rear direction of the pushing device 1. Further, a fixed pipe body support portion 6 is fixed to the upper portion of the base portion 4 along the front-rear direction of the pushing device 1. The base portion 4 and the fixed tube support portion 6 are each composed of a pair of plate materials, and the plate materials are fixed apart like rails along the front-rear direction of the pushing device 1, and the pushing portion 8 is between them. Moving. The fixed tube support portion 6 does not have to be a plate-shaped member, and may be, for example, a rod (square bar, round bar) -shaped member, an L-shaped cross-section member, or the like.

Each plate material constituting the fixed pipe body support portion 6 is supported by a support column fixed on the pedestal of the pedestal portion 4. Further, the distance between the two plate materials is narrower than the diameter of the new pipe material, and the new pipe material placed on both plate materials is supported.

As shown in FIGS. 3A and 3B, the movable pipe body support portion 7 has a main body and a pair of wheels 15, and an axle 15a connecting both wheels 15 is attached to the main body via a bearing. It is fixed. The distance between the two wheels 15 is wider than the distance between the two plate materials constituting the base 4, and the distance between the wheels 15 is such that none of the wheels derail from the plate material. Further, the width of the main body is sized so that the movable pipe body support portion 7 does not come into contact with the fixed pipe body support portion 6 when the movable pipe body support portion 7 moves on the base portion 4. The movable pipe body support portion 7 moves on the pedestal of the pedestal portion 4 with the newly installed pipe supported on the upper surface thereof. Since there is time for two new pipes to be placed on the pushing device 1 at the same time, at least two movable pipe body support portions 7 are prepared. In addition, in FIGS. 3A and 3B, two wheels are used for each of the left and right wheels, but four wheels may be used as in the relay member 17 described later.

The drive guide portion 10 is composed of two columnar steel rods, and is fixed below the base portion 4 along the front-rear direction of the pushing device 1.

The rack support portion 11 is made of one plate material, and is fixed below the drive guide portion 10 along the front-rear direction of the pushing device 1. A rack (teeth that mesh with gears) 14 is formed on the upper surface of the rack support portion 11 along the front-rear direction of the pushing device 1.

The push-in portion 8 has a pinion 13 which is a gear that meshes with the rack 14, and has an insertion hole through which two steel rods constituting the drive guide portion 10 are inserted, and a fixed pipe body support portion 6 and a movable pipe. The contact portion that comes into contact with the rear end surface of the new pipe supported by the body support portion 7 (the end surface of the receiving port that receives the insertion port of the subsequent new pipe) protrudes from between the two plates constituting the base portion 4. Is formed in.

The rotating shaft 12 of the pinion 13 extends in the left-right (side surface) direction of the pushing device 1, and operating portions 9 are fixed to both ends thereof. A rotation shaft 12 is fixed to the center of the ring-shaped operation unit 9, and when the operator rotates the operation unit 9, the pinion 13 and the rack 14 mesh with each other to rotate the pinion 13. As a result, the push-in portion 8 moves back and forth along the drive guide portion 10. That is, the pinion 13, the rack 14, and the operating unit 9 function as a driving unit 19 for moving the pushing unit 8.

Next, a method of pushing the newly installed pipe into the sheath pipe by using the pushing device 1 according to the present embodiment will be described with reference to FIGS. 4 to 9.

First, as shown in FIGS. 5 and 6, the pushing device 1 is installed at the bottom of the starting shaft 20. At this time, the length of the leg portion 3 is adjusted by the height adjusting portion 5 so that the height of the fixed tube body support portion 6 and the height of the sheath tube 21 match. Further, the pushing portion 8 rotates the operating portion 9 to move it to the rear end portion. Next, the movable tube body support portion 7 is placed on the pedestal of the pedestal portion 4. At this time, the movable tube body support portion 7 may be placed in contact with the abutting portion of the pushing portion 8, or may be placed away from the abutting portion.

After the installation of the pushing device 1 is completed, the new pipe P is then lowered toward the bottom of the starting shaft 20 as shown in FIG. 7 (A). Before lowering the new pipe P, the propulsion force transmission device 22 is attached to the insertion port of the new pipe P. The propulsion force transmission device 22 has a function of transmitting a pushing force from the rear to the new pipe P to which the propulsion force transmission device 22 is attached to the preceding new pipe P. Further, the propulsion force transmission device 22 is provided with a plurality of wheels, and the wheels rotate in contact with the inner surface of the sheath pipe 21 or the plate material of the fixed pipe support portion 6, so that the newly installed pipe P is sheathed. It becomes easier to propel along the pipe 21.

As shown in FIG. 7B, the lowered new pipe P is placed on the fixed pipe support portion 6 and the movable pipe support portion 7.

Next, the operating portion 9 is rotated to move the pushing portion 8 forward (in the direction in which the sheath pipe 21 is located). At this time, the push-in portion 8 moves along the drive guide portion 10 because the two steel rods constituting the drive guide portion 10 are inserted into its own insertion holes. As a result, as shown in FIG. 7C, the contact portion of the push-in portion 8 comes into contact with the rear end surface of the new pipe P, and the new pipe P has the fixed pipe support portion 6 and the movable pipe support portion 7. It is pushed into the sheath pipe 21 while being supported by.

After moving the push-in portion 8 to the frontmost portion, as shown in FIGS. 8A and 8B, the stopper 16 is fitted between the end surface of the sheath pipe 21 on the starting shaft 20 side and the receiving port of the new pipe P. Include. As shown in FIGS. 4A and 4B, the stopper 16 has a U-shaped cross section, and the U-shaped portion has a size in which the new pipe P can be inserted. .. As a result, when the subsequent new pipe P is joined from the rear, the receiving portion having a large outer diameter of the new pipe P is caught by the stopper 16 and prevents the new pipe P from entering the sheath pipe 21. ..

When the installation of the stopper 16 is completed, the operating portion 9 is rotated to move the pushing portion 8 to the rear of the pushing device 1. Further, another movable tube body support portion 7 is placed on the pedestal of the pedestal portion 4. At this time, another movable tube body support portion 7 may be placed in contact with the abutting portion of the pushing portion 8, or may be placed away from the abutting portion.

Next, in the same manner as the new pipe P (preceding pipe P1) pushed into the sheath pipe 21, the succeeding new pipe P (following pipe P2) is lowered toward the bottom of the starting shaft 20 and shown in FIG. 8 (B). ), The fixed tube support 6 and another movable tube support 7 are placed on the fixed tube support 6.

Next, the operating unit 9 is rotated to move the pushing unit 8 forward, and as shown in FIG. 8C, the trailing pipe P2 is connected to the receiving port of the leading pipe P1 (an example of the "first new pipe"). (An example of "second new pipe") is fitted, and the leading pipe P1 and the trailing pipe P2 are joined. In this way, the pushing device 1 also functions as a joining tool for joining the receiving port of the leading pipe P1 and the insertion port of the trailing pipe P2, and performs work in a series of flows together with pushing into the sheath pipe 21. be able to.

When the joining of the leading pipe P1 and the trailing pipe P2 is completed, the stopper 16 is removed as shown in FIG. 9 (A), and then the stopper 16 is preceded by the pushing portion 8 as shown in FIGS. 9 (B) and 9 (C). Push the pipe P1 and the trailing pipe P2 into the sheath pipe 21. At this time, the movable pipe body support portion 7 that supports the leading pipe P1 moves to the tip of the base portion 4 and then comes off from the tip of the base portion 4. After moving the pushing portion 8 to the frontmost portion, the stopper 16 is fitted again between the end surface of the sheath pipe 21 on the starting shaft 20 side and the receiving port of the trailing pipe P2.

After that, by repeating these operations, the newly installed pipe P is sequentially pushed into the sheath pipe 21.

Next, with reference to FIGS. 10 and 11, a method of pushing the new pipe P, which is longer than the new pipe shown in FIGS. 4 to 9, into the sheath pipe by using the pushing device 1 according to the present embodiment will be described.

First, after installing the pushing device 1 at the bottom of the starting shaft 20, the new pipe P is placed on the fixed pipe support portion 6 and the movable pipe support portion 7 as shown in FIG. 10 (A). .. At this time, the rear end surface of the new pipe P is placed in contact with the contact portion of the push-in portion 8.

Next, the operating portion 9 is rotated to move the pushing portion 8 forward (in the direction in which the sheath pipe 21 is located). As a result, as shown in FIG. 10B, the newly installed pipe P in contact with the push-in portion 8 is supported by the fixed pipe body support portion 6 and the movable pipe body support portion 7, and is inside the sheath pipe 21. Pushed into.

After moving the push-in portion 8 to the foremost part, the next new pipe P (following pipe P2) will be placed on the push-in device 1 as shown in FIG. 10 (C). In this case, the new pipe P is newly installed. Since the length of the pipe P is long, the rear portion of the leading pipe P1 is not pushed to the tip of the fixed pipe body support portion 6, and the trailing pipe P2 cannot be placed.

Therefore, as shown in FIG. 11A, the push-in portion 8 is moved rearward, and then the relay member 17 is placed on the base of the base 4. The relay member 17 has a main body and wheels, and the wheels are connected to each other by an axle and fixed to the main body via a bearing. The distance between the left wheel and the right wheel is wider than the distance between both plate materials constituting the base 4, and the distance is such that none of the wheels derails from the plate material. Further, the width of the main body is sized so that the relay member 17 does not come into contact with the fixed tube body support portion 6 when traveling on the base portion 4. The relay member 17 comes into contact with the rear end surface of the new pipe P in place of the abutting portion of the pushing portion 8, and transmits the pushing force from the pushing portion 8 to the new pipe P.

After the relay member 17 is placed on the table of the base part 4, as shown in FIG. 11B, the operation part 9 is rotated to move the push-in part 8 forward (in the direction in which the sheath pipe 21 is located). As a result, the pushing portion 8 pushes the relay member 17 from the rear, and the relay member 17 comes into contact with the rear end surface of the leading pipe P1 and pushes the leading pipe P1 from the rear.

After moving the push-in portion 8 to the frontmost portion, the relay member 17 is removed from the base of the base portion 4, and the operation portion 9 is rotated to move the push-in portion 8 to the rear of the push-in device 1. Next, another movable tube body support portion 7 is placed on the pedestal of the pedestal portion 4. At this time, another movable tube body support portion 7 may be placed in contact with the abutting portion of the pushing portion 8, or may be placed away from the abutting portion.

Next, as shown in FIG. 11C, the trailing pipe P2 is lowered toward the bottom of the starting shaft 20 in the same manner as the leading pipe P1 previously pushed into the sheath pipe 21, and the fixed pipe body support portion. It is placed on 6 and another movable tube support portion 7.

In this way, the long new pipe P can be pushed by using the relay member 17 and pushing the new pipe P in two steps.

As described above, in the pushing device 1 according to the present embodiment, the base 2 is installed at the bottom of the starting shaft 20, and the fixed pipe body support portion 6 fixed to the base 2 supports the newly installed pipe P. , The movable pipe body support portion 7 that can move along the pipe axis direction of the new pipe P supports the new pipe P, and the pushing portion 8 pushes the new pipe P from behind along the pipe axis direction, and the pushing portion 8 The pinion (an example of a "gear") fixed to the operation unit 9 meshes with the rack 14 fixed to the base 2 along the pipe axis direction and rotates to push the push-in portion 8 in the pipe axis direction. Move (drive) along.

Therefore, according to the pushing device 1 according to the present embodiment, since the new pipe P is pushed by using a rack and pinion that does not use a power source, no operating noise is generated and there is no influence on the surrounding environment. In addition, since it does not use a drive device such as a cylinder, it is lightweight and the device can be easily disassembled and assembled. Further, by fixing the leading pipe P1 with a stopper, the leading pipe P1 and the trailing pipe P2 can be joined. Therefore, the work from joining the pipes to pushing is performed by a series of pushing flow into the sheath pipe. Can be done.

Further, the relay member 17 of the pushing device 1 according to the present embodiment is removable from the base 2, and is sandwiched between the new pipe P (preceding pipe P1) and the pushing portion 8 and is a pipe of the new pipe P. It moves along the axial direction, and when the pushing portion 8 moves, the new pipe P is pushed in from the rear. As a result, even when the length of the new pipe P (leading pipe P1) is long, the new pipe P (leading pipe P1) can be pushed in twice by using the relay member 17.

Further, the leg portion 3 that supports the base 2 of the pushing device 1 according to the present embodiment includes a height adjusting portion 5 (an example of the "height adjusting means"). As a result, the pushing device 1 can be stably installed even if the bottom of the starting shaft is uneven.

In the present embodiment, the push-in portion 8 abuts only on the new pipe P and pushes the new pipe P from behind, but the push-in portion 8 abuts only on the movable pipe support portion 7 and pushes in. Alternatively, the new pipe P and the movable pipe body support portion 7 may be brought into contact with each other and pushed in.

Similarly, the relay member 17 is sandwiched between at least one of the new pipe P and the movable pipe body support portion 7 and the pushing portion 8, moves along the pipe axis direction of the new pipe P, and is pushed. When the portion 8 moves forward, at least one of the new pipe P and the movable pipe body support portion 7 may be pushed in from the rear.

Further, the drive unit for moving the push-in portion 8 back and forth may have a gear and an operation unit for rotating the gear. Hereinafter, a modified example of the two pushing devices 1 in which the configuration of the drive unit is modified will be described. In this section, the parts different from the present embodiment will be mainly described, and the description of the same parts will be omitted.

First, a first modification of the pushing device 1 will be described with reference to FIGS. 12 and 13. In the first modification, as shown in FIGS. 12A and 12B, the lower portion of the pushing portion 8 is formed long along the front-rear direction of the pushing device 1. Then, as shown in FIG. 13B, a groove is formed in the center of the lower portion thereof along the front-rear direction of the pushing device 1, and a rack 14 is formed at the bottom of the groove.

Further, the rotating shaft support base 23 is made of one plate material, and is fixed below the drive guide portion 10 along the front-rear direction of the pushing device 1. Two rotating shaft support walls 24 are erected on the base of the rotating shaft support base 23, and the rotating shaft support wall 24 supports the rotating shaft 12. A pinion 13, which is a gear that meshes with the rack 14, is fixed to the center of the rotating shaft 12. Further, operating portions 9 are fixed to both ends of the rotating shaft 12. Then, when the operator rotates the operation unit 9, the pinion 13 and the rack 14 mesh with each other to rotate the pinion 13. As a result, the push-in portion 8 moves back and forth along the drive guide portion 10.

Next, a second modification of the indentation device 1 will be described with reference to FIGS. 14 and 15. In the second modification, the push screw 25 and the nut 26 are used to move the push-in portion 8 back and forth. As shown in FIGS. 14A and 14B, a feed screw 25 (an example of a “gear”) is fixed below the base 4 along the pipe axis direction of the newly installed pipe P. Further, an operating portion 9 is fixed to the rear end portion of the feed screw 25.

On the other hand, as shown in FIG. 15B, a nut 26 that meshes with the feed screw 25 is fixed to the push-in portion 8.

Then, when the operator rotates the operation unit 9, the feed screw 25 and the nut 26 mesh with each other to rotate the feed screw 25. As a result, the push-in portion 8 moves back and forth along the drive guide portion 10.

1: Propulsion laying method pipe pushing device 2: Base 3: Leg 4: Base 5: Height adjustment part 6: Fixed pipe support part 7: Movable pipe support part 8: Pushing part 9: Operation Part 10: Drive guide part 11: Rack support part 12: Rotating shaft 13: Pinion 14: Rack 15: Wheel 16: Stopper 17: Relay member 18: Wheel 19: Drive part 20: Starting shaft 21: Sheath pipe 22: Propulsion force Transmission device 23: Rotating shaft support base 24: Rotating shaft support wall 25: Feed screw 26: Nut P: New pipe

The invention according to claim 1 is for a propulsion laying method used when pushing a new pipe into a sheath pipe in a propulsion laying method for laying a new pipe to which a propulsion force transmitting device having wheels is attached in the sheath pipe. It is a pipe pushing device, and the new pipe is brought into contact with the base installed at the bottom of the starting shaft and the wheels of the propulsion force transmitting device fixed to the base and attached to the new pipe. A fixed pipe support portion to support, a movable pipe support portion that supports the new pipe and can move along the pipe axis direction of the new pipe, and the new pipe and the movable pipe support portion. It has a pushing portion for pushing at least one of them from the rear along the pipe axis direction, and a gear and an operating portion for rotating the gear, and the pushing portion is pushed into the pipe in response to an operation on the operating portion. It is characterized by including a drive unit for driving along the axial direction.

The invention according to claim 7 is the pipe pushing device for the propulsion laying method according to any one of claims 1 to 6, wherein the second new pipe is placed in the sheath after the first new pipe. It is characterized by including a removable stopper that prevents the first new pipe from being pushed into the sheath pipe when the first new pipe and the second new pipe are joined to be pushed into the pipe. And.
The invention according to claim 8 uses the pipe pushing device for the propulsion laying method according to any one of claims 1 to 7, and lays a new pipe to which a propulsion force transmission device having wheels is attached in a sheath pipe. In the propulsion laying method, the new pipe is placed on the fixed pipe support portion and the movable pipe support portion, and the operation portion is operated to operate the push portion. It is characterized by including a pushing step of driving the new pipe forward along the pipe axis direction and pushing the new pipe.
The invention according to claim 9 is a propulsion laying method in which a new pipe to which a propulsive force transmission device having wheels is attached is laid in a sheath pipe by using the pipe pushing device for the propulsion laying method according to claim 7. In the first mounting step of mounting the first new pipe on the fixed pipe support portion and the movable pipe support portion, and by operating the operation portion, the pushing portion is placed on the pipe. A first pushing step of driving the first new pipe forward along the axial direction to push the first new pipe, an attachment step of attaching the stopper to the first new pipe, and the fixed pipe of the second new pipe. The second mounting step of mounting on the body support portion and the movable tube body support portion and the operation section are operated to drive the push-in portion forward along the pipe axis direction, and the first step. The joining step of moving the new pipe 2 forward to join the first new pipe to which the stopper is attached, and removing the stopper from the first new pipe joined to the second new pipe. It is characterized by including a removing step and a second pushing step of operating the operating portion to drive the pushing portion forward along the pipe axis direction and pushing the second new pipe.

The invention according to claim 1 is for a propulsion laying method used when pushing a new pipe into a sheath pipe in a propulsion laying method for laying a new pipe to which a propulsion force transmitting device having wheels is attached in the sheath pipe. It is a pipe pushing device, and the new pipe is brought into contact with the base installed at the bottom of the starting shaft and the wheels of the propulsion force transmitting device fixed to the base and attached to the new pipe. A movable type that supports the fixed pipe body support portion to be supported and the new pipe can be moved along the pipe axis direction of the new pipe on a moving surface provided apart from the fixed pipe body support portion. A push-in portion capable of separating from the movable pipe support portion, which pushes at least one of the new pipe and the movable pipe support portion from the rear along the pipe axis direction, and a pipe support portion. It has a gear and an operation unit for rotating the gear, and is characterized by including a drive unit that drives the push-in portion along the pipe axis direction in response to an operation on the operation unit.

Claims (8)

A pipe pushing device for the propulsion laying method used when pushing the new pipe into the sheath pipe in the propulsion laying method for laying the new pipe in the sheath pipe.
The base installed at the bottom of the starting shaft and
A fixed pipe body support portion that is fixed to the base and supports the new pipe,
A movable pipe body support portion that supports the new pipe and can move along the pipe axis direction of the new pipe,
A push-in portion that pushes at least one of the new pipe and the movable pipe support portion from the rear along the pipe axis direction, and a push-in portion.
A drive unit having a gear and an operation unit for rotating the gear, and driving the push unit along the pipe axis direction in response to an operation on the operation unit.
A pipe pushing device for the propulsion laying method, which is characterized by being equipped with. The pipe pushing device for the propulsion laying method according to claim 1.
The drive unit has a rack fixed to the base along the pipe axis direction, and a pinion which is a gear fixed to the push-in part and the operation part, and the pinion is the rack. A pipe pushing device for a propulsion laying method, characterized in that the pushing portion is driven along the pipe axial direction by engaging with and rotating. The pipe pushing device for the propulsion laying method according to claim 1.
The drive unit has a rack included in the push-in portion along the pipe axis direction, and a pinion which is a gear fixed to the base and the operation unit, and the pinion is attached to the rack. A pipe pushing device for a propulsion laying method, characterized in that the pushing portion is driven along the pipe axial direction by meshing and rotating. The pipe pushing device for the propulsion laying method according to claim 1.
The drive unit has a nut included in the push-in portion and a feed screw fixed to the base along the pipe axis direction instead of the gear, and the feed screw meshes with the nut. A pipe pushing device for a propulsion laying method, characterized in that the pushing portion is driven along the pipe axial direction by rotating the pushing portion. The pipe pushing device for the propulsion laying method according to any one of claims 1 to 4.
When the new pipe is sandwiched between at least one of the new pipe and the movable pipe body support portion and the push-in portion and moves along the pipe axis direction, and the push-in portion is driven, the new pipe is installed. A pipe pushing device for a propulsion laying method, which is a relay member that pushes at least one of the movable pipe body support portion from behind and includes a removable relay member. The pipe pushing device for the propulsion laying method according to any one of claims 1 to 5.
A pipe pushing device for a propulsion laying method, characterized in that the legs supporting the base are provided with height adjusting means. The pipe pushing device for the propulsion laying method according to any one of claims 1 to 6.
The drive unit pushes the first new pipe by driving the push-in portion forward along the pipe axis direction, and then drives the push-in part rearward along the pipe axis direction. After the second new pipe is supported by the fixed pipe support portion and the movable pipe support portion, the push-in portion is driven forward along the pipe axial direction, whereby the first new pipe is installed. A pipe pushing device for a propulsion laying method, characterized in that a pipe receiving port and a pipe insertion port of the second new pipe are joined. The pipe pushing device for the propulsion laying method according to claim 7.
A pipe pushing device for a propulsion laying method, comprising a removable stopper that prevents the first new pipe from being pushed into the sheath pipe when the receiving port and the insertion port are joined.

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