JPH09471U - Casing driver rotation reaction force removal method - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a method for removing a reaction force of a casing driver capable of constructing a casing at the boundary of a site. SOLUTION: The crawler 5 of the working machine is moved toward a reaction force receiving portion 18 at the tip of a beam 19 which constitutes a rotational reaction force removing device 3 provided in the casing driver 2, and a side surface of the crawler 5 receives the reaction force. The portion 18 is brought into contact with and receives the rotational reaction force.

Description

[Detailed description of the device]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a rotational reaction force removing method used in a casing driver for press-fitting and withdrawing casings of large-diameter steel pipe piles or steel pipes used for construction and civil engineering foundation works.

[0002]

[Prior art]

 A casing driver is used to press-fit and pull out large-diameter steel pipe piles or casings of steel pipes (hereinafter referred to as casings) used for construction and civil engineering foundation works. The casing driver generally includes a band device that holds the casing, a rotating device that rotates the band device, and a thrust cylinder that raises and lowers the band device and the rotating device.

In the above casing driver, when the casing is press-fitted and pulled out, a rotational force is applied to the casing by the rotating device, so that the rotational reaction force acts on the body of the casing driver. As measures for taking this rotational reaction force, there are those described in Japanese Utility Model Publication No. 61-84738 and Japanese Utility Model Publication No. 61-84737.

The former known example (Japanese Utility Model Laid-Open No. 61-84738) discloses a swing pushing device including a swing cylinder for swinging the casing in the circumferential direction and a push cylinder for pushing the casing into the ground. To provide a reaction force device that receives the swinging reaction force generated by the device, specifically, a crawler frame, which is a reaction force supporting object, is provided with an arm member extended to avoid the crawler belt, and its tip is provided. A hydraulic jack is attached vertically to the base, and the side base of the rocking and pushing device is configured to be pressed by the hydraulic jack.The crawler frame is connected via the hydraulic jack and the arm member that press the base. It is designed to receive the swing reaction force.

The latter known example (Japanese Utility Model Laid-Open No. 61-84737) is similar to the former known example (Japanese Utility Model Laid-Open No. 61-84738), and is a swing cylinder that swings the casing in the circumferential direction. In a swing pushing device including a pushing cylinder that pushes the casing into the ground, the bracket and the swing pushing device provided at the center of the front part of the lower swivel base of the working machine are formed into a substantially triangular frame. It is connected by a link arm, and the swing reaction force of the swing pushing device is received by the working machine via the frame body and the link arm.

[0006]

[Problems to be solved by the device]

 In the above-mentioned prior art, in the former known example, since the hydraulic jack at the tip of the arm member extending from the crawler frame of the working machine presses the base provided on the side surface of the swing pushing device body, the arm is The member protrudes outward beyond the width of the swing pushing device body. Further, in the latter known example, the link arm and frame for connecting the working machine and the rocking and pushing device are pin-connected to the bracket provided at the front center of the swivel base of the working machine, so that the working machine swings. It is arranged at a position facing one side surface of the dynamic pushing device, which causes a part of the working machine to project outward beyond the width of the swing pushing device main body. For this reason, in any of the above-described conventional techniques, the swing reaction force removing device has to be substantially larger than the size of the swing pushing device body.

Further, in any of the above-mentioned known examples, since the armor for supporting the reaction force or the frame body and the link arm are directly connected to the working machine that supports the reaction force, there is a problem in shaking during the work. When moving the dynamic pushing device, it is necessary to move the working machine and the swing pushing device after uncoupling them, which requires a long time for movement and is not good in workability.

Furthermore, in the former known example, since the swing reaction force is received via the arm member, when the base of the swing pushing device is pressed by the hydraulic jack, the arm is pushed. Since the member is bent, the arm member cannot be configured so long that it is difficult to support a large swing reaction force. In the latter known example, since the swing reaction force is received via the frame body and the link arm, the link arm connecting the frame body and the working machine and the bracket of the working machine are large in terms of strength. It is easy and requires manual labor to attach and detach manually. In addition, since it is necessary to align the link arm and the bracket when they are connected to each other by a pin, there is a problem that the workability and the link arm are moved and workability is significantly deteriorated.

On the other hand, in recent years, with the rise in land prices, there has been an increasing demand for construction and civil engineering to be built within the allowable range of the site. In this way, when constructing a building or civil engineering structure just within the allowable range of the site, the casing that forms the basis of the building or civil engineering structure should be built in the ground just within the allowable range of the site. is necessary .

However, in the above-mentioned conventional technique, the casing, which is the basis of the building and the civil engineering structure, cannot be built in the ground just within the allowable range of the construction site. The reason for this is that in both the former known example and the latter known example, the reaction force catching device that receives the swing reaction force projects outward from the width of the swing pushing device body. Even if the pushing device is installed at the limit of the allowable range on the construction site, the casing to be built by this swing pushing device is not only the distance from the side edge of the swing pushing device body to the center of the casing but also the reaction force removing device described above. This is because it must be located further inside the construction site by the dimension of. As a result, there are cases in which piles must be placed at a position that is slightly offset from the design pile core position for buildings and civil engineering structures. Therefore, since the piles will be eccentric with respect to the positions of the pillars of the building and civil engineering structures, it was necessary to increase the pile diameter or increase the number of piles from the beginning. In particular, if there are buildings around the construction site, the effect will be significant.

Further, since the working machine that receives a reaction force is also connected to the swing pushing device through the arm member or the frame body and the link arm, the arrangement position thereof is likely to be limited, and the working machine itself is restricted. Construction at the border of the site may not be possible.

The present invention has been made in view of the above-mentioned problems, and the casing can be pushed not only in the site but also in the ground just near the boundary of the site, and the casing can be pulled out from the ground. It is an object of the present invention to provide a method for removing the rotational reaction force of a casing driver that can be used.

[0013]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is applied to a method for receiving a rotational reaction force generated by a casing driver, which constitutes a rotational reaction force removing device provided in the casing driver. The crawler of the working machine is moved toward the reaction force receiving portion of the beam, and the crawler is brought into contact with the reaction force receiving portion so that the rotational reaction force is received by the weight of the working machine.

A second invention is applied to a method of receiving a rotational reaction force generated by a casing driver, and works toward a reaction force receiving portion at a tip of a beam which constitutes a rotational reaction force removing device provided in the casing driver. The crawler of the machine is moved, the side surface of the crawler is brought into contact with the reaction force receiving portion, and the rotational reaction force is received by the weight of the working machine.

A third invention is applied to a method of receiving a rotational reaction force generated by a casing driver, and a fork-shaped reaction force receiving portion at a tip of a beam which constitutes a rotational reaction force absorbing device provided in the casing driver. After advancing the crawler of the working machine, the side surface of the crawler is brought into contact with the reaction force receiving portion so that the rotational reaction force is received by the weight of the working machine.

A fourth invention is applied to a method of receiving a rotational reaction force generated by a casing driver, and a fork-shaped reaction force receiving portion at a tip of a beam which constitutes a rotational reaction force absorbing device provided in the casing driver is provided. After advancing the crawler of the working machine, the beam is rocked to bring the reaction force receiving portion into contact with the side surface of the crawler so that the rotational reaction force is received by the weight of the working machine. Is.

A fifth invention is applied to a method of receiving a rotational reaction force generated by a casing driver, and a fork-shaped reaction of a beam tip forming a rotational reaction force removing device symmetrically provided on the casing driver. The crawler of the working machine is inserted into the force receiving portion, and the side surface of each crawler is brought into contact with each reaction force receiving portion so that the rotational reaction force is received by the weight of the working machine. .

A sixth invention is applied to a method for receiving a rotational reaction force generated by a casing driver, and a fork-shaped reaction of a beam tip constituting a rotational reaction force removing device symmetrically provided on the casing driver. After each of the crawler of the working machine enters the force receiving section, the beams are rocked to bring the reaction force receiving sections into contact with the side surfaces of the crawler to apply the rotational reaction force to the working machine. It was designed so that it would be accepted by the weight of.

A seventh invention is applied to a method of receiving a rotational reaction force generated by a casing driver, wherein a reaction force receiving portion of a beam forming a rotational reaction force removing device provided in the casing driver is installed in a working machine. A method for removing a rotational reaction force of a casing driver, which is configured to contact a crawler and receive a rotational reaction force in a direction opposite to a rotational direction of the casing by the weight of the working machine.

[0020]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described more specifically with reference to the drawings.

FIG. 1 is a front view of a casing driver to which a rotary reaction force removing device used in the present invention is attached, and FIG. 2 is a plan view thereof. In these drawings, 1 is a casing, 2 is a casing driver for press-fitting and withdrawing the casing 1, 3 is a rotary reaction force removing device attached to the casing driver 2, and 4 is for excavating earth and sand in the casing 1. In the medium excavator, the crawler 5 of the excavator 4 plays a role of supporting the rotational reaction force generated in the casing driver 2.

The casing driver 2 described above has a base frame 7 adjusted to a horizontal position by a jack cylinder 6, guide posts 8 standing at four corners of the base frame 7, and one end of which is attached to the base frame 7. It is composed of a rotary drive device 10 which is moved up and down along the guide post 8 by a thrust cylinder 9, and a band device 11 attached to a rotary side portion of the rotary drive device 10.

As shown in FIG. 1, the rotary drive device 10 includes a slewing bearing 12 with external teeth, a pinion 13 that meshes with the external teeth of the slewing bearing 12 to rotate the slewing bearing 12, and the pinion 13. It is composed of a hydraulic motor 14 with a planetary speed reducer that is driven.

The band device 11 is fixed to the outer race, which is the rotating body side of the slewing bearing 12. The band device 11 is adapted to chuck and open the casing 1 by a band cylinder 15 attached thereto.

The rotational reaction force removing device 3 has a bracket 16 provided on the base frame 7, one end of which is swingably mounted by a vertical pin 17, and the other end of which receives a rotational reaction force in one direction. A beam 19 of a long structure having 18; a reaction force receiving bracket 21 removably attached to the other end side of the beam 19 by a pin 20 so as to face the reaction force receiving portion 18; The base end is attached by a pin 22 to a bracket 23 provided on the base frame 7, and the piston rod tip is constituted by a beam swing hydraulic cylinder 25 connected to the beam 19 by a pin 24.

The reaction force receiving portion 18 and the reaction force receiving bracket 21 are configured such that the one crawler 5 of the excavator 4 described above can be inserted between the opposing portions thereof, and the fork-shaped reaction It forms a force receiving portion.

The above-described rotational reaction force removing device 3 is arranged symmetrically with respect to the casing driver 2.

Next, a method of the present invention for receiving the rotational reaction force generated in the casing driver 2 by the rotational reaction force removing device 3 described above will be described.

The casing 1 is suspended by another cargo handling machine prepared and inserted into the casing driver 2. The casing 1 inserted into the casing driver 2 is chucked by the band device 11.

Next, when the hydraulic motor 14 with a planetary speed reducer attached to the rotary drive device 10 is driven, the rotation of the pinion 13 causes the slewing bearing 12 with external teeth to rotate. Along with this, the band device 11 fixed on the outer race of the slewing bearing 12 rotates. The casing 1 is rotated by the rotation of the band device 11.

In this state, when the thrust cylinder 9 is contracted, the rotary drive device 10 is guided by the guide posts 8 and descends, so that the rotating casing 1 also descends. When the casing 1 descends with rotation, the casing 1 bites into the ground while rotating. At this time, the rotational reaction force against the rotational excavation force of the casing 1 acts on the casing driver 2. This rotational reaction force is received by the rotational reaction force removing device 3.

In this casing driver, the pushing reaction force of the casing 1 is received by the weight of the casing driver 2. Therefore, the pushing force receiving device is not attached to the casing driver. Has become.

A first method for receiving the above-described rotational reaction force by the rotational reaction force removing device 3 will be described below.

Prior to the operation of biting the casing 1 into the ground while rotating it by the casing driver 2 described above, the intermediate excavator 4 located around the casing driver 2 is rotated by the rotary reaction force removing device 3. The beam 19 is moved to the vicinity of the reaction force receiving portion 18 on the tip side, and the crawler 5 is inserted into the space between the reaction force receiving portion 18 and the reaction force receiving bracket 21. As a result, the rotational reaction force removing device 3 is in a state of being able to receive the rotational reaction force acting on the casing driver 2.

In this state, as described above, when the casing driver 2 causes the casing 1 to bite into the ground while rotating, a rotational reaction force corresponding to the rotational excavating force is generated in the casing driver 2. The rotational reaction force acting on the casing driver 2 is transmitted to the reaction force receiving portion 18 on the tip end side of the beam 19 constituting the rotational reaction force absorbing device 3 through the guide post 8 and the base frame 7, and the reaction force receiving portion 18 is illustrated. It is moved in the direction of arrow A indicated by 2. The movement of the reaction force receiving portion 18 in the direction of the arrow A is received by the side surface of the crawler 5 in the excavator 4 as shown in FIG.

According to this rotation reaction force removing method, the beam 19 forming the rotation reaction force removing device 3 extends outward from one side surface of the casing driver 2 and the action point of the rotation reaction force is at the casing. Since the position is far from the center of 1, the tangential force at the location where the rotational reaction force acts becomes small. As a result, even the frictional force with the ground due to the weight of the excavator 4 can sufficiently receive the rotational reaction force described above.

Further, in the above-described first rotational reaction force collecting method of the present invention, movement of the reaction force receiving portion 18 in the direction of arrow A is received by the inner side surface of the crawler 5 of the excavator 4 as shown in FIG. If it is stopped, it is not necessary to install the crawler 5 outside the construction site, and the casing driver 2 can be installed at the border of the construction site within the allowable construction range. As a result, it is possible to push the casing even at the border of the construction site within the allowable construction range. It is also possible to pull out the casing pushed into the boundary of the construction site within the allowable construction range from the ground.

Next, the second method for removing the rotational reaction force of the present invention will be described.

First, the tip side pin 20 fixing the reaction force receiving bracket 21 on the tip side of the beam 19 shown in FIG. 2 to the reaction force receiving portion 18 is pulled out, and the bracket 21 is used as another fulcrum for the other pin 20. Rotate counterclockwise on the plane of FIG. Next, the excavator 4 is moved so that the inside of the crawler 5 faces the reaction force receiving portion 18. In this state, the piston rod of the hydraulic cylinder 25 is extended to rotate the beam 19 counterclockwise on the pin 17 as a fulcrum in the plane of FIG. 2, and the side surface of the reaction force receiving portion 18 at the tip of the beam 19 is rotated. Are brought into contact with the side surface of the crawler 5. At this time, in order to prevent the side surface of the crawler 5 from being damaged by the side surface of the reaction force receiving portion 18, a batten may be provided between the side surface of the reaction force receiving portion 18 and the side surface of the crawler 5.

Then, the above-mentioned reaction force receiving bracket 21 is rotated clockwise in FIG. 2 to be returned to the original state, and then the pin 20 is inserted again to move the reaction force receiving bracket 21 to the reaction force. It is fixed to the receiving portion 18. At this time, in order to prevent the side surface of the crawler 5 from being damaged by the side surface of the reaction force receiving bracket 21, a batten may be provided between the side surface of the reaction force receiving bracket 21 and the side surface of the crawler 5.

As described above, by connecting the crawler 5 of the excavator 4 and the reaction force receiving portion 18 of the beam 19 of the rotational reaction force removing device 3, the first rotational reaction force removing device of the present invention described above is connected. Similar to the method, it is not necessary to install the crawler 5 outside the construction site, and the casing driver 2 can be installed at the border of the construction site within the allowable construction range. As a result, it is possible to push the casing to the border of the construction site within the allowable construction range. It is also possible to pull out the casing pushed into the boundary of the construction site within the allowable construction range from the ground. Further, as compared with the above-described first rotational reaction force removing method of the present invention, the alignment work between the side surface of the reaction force receiving portion 18 of the rotational reaction force removing device 3 and the side surface of the crawler 5 of the excavator 4 can be performed more easily. Since it becomes easier, work efficiency is improved. Further, in the above-mentioned second method of taking a reaction force of the present invention, since the beam 19 in the reaction force removing device 3 is configured to be rotatable, the installation work of the casing driver at the built-in position of the casing is performed. Since the operation of abutting the reaction force removing device 3 on the reaction force support such as the crawler 5 of the excavator 4 can be performed separately, the work efficiency is improved also from this viewpoint.

In the above-described first and second rotational reaction force removing methods of the present invention, the crawler 5 in the excavator 4 is sandwiched between the reaction force receiving portion 18 and the reaction force receiving bracket 21. Since it is configured, it is possible to receive not only the rotational reaction force in one direction but also the rotational reaction force in both directions. Therefore, the present invention can be applied to an oscillating casing driver that repeats normal rotation and reverse rotation.

Next, a third method for removing the rotational reaction force of the present invention will be described.

In the third method for removing the reaction force of rotation, the reaction force removing device 3 is arranged symmetrically with respect to the casing driver 2 as shown in FIG. 1 and FIG. The device 3 receives the rotational reaction force by the above-described first rotational reaction force taking method of the present invention or the second rotational reaction force taking method of the present invention.

According to the third rotational reaction force removing method of the present invention, like the first and second rotational reaction force removing methods of the present invention described above, even at the boundary of the construction site within the allowable construction range. The casing can be pushed in and the casing pushed into the construction site at the border of the allowable construction range can be pulled out from the ground. Further, according to the method of this embodiment, the rotational reaction force acting on the crawler 5 of the excavator 4 from the rotational reaction force removing device 3 can be distributed to the two rotational reaction force removing devices 3. It is possible to reduce the size of the beam 19 that constitutes the rotary reaction force removing device 3, to reduce the size of the rotary reaction force removing device 3, and to increase the certainty of the rotary reaction force removing work. You can

Next, a fourth rotation reaction force removing method of the present invention will be described.

The fourth rotational reaction force removing method of the present invention rotates the swing type beam 19 constituting the rotational reaction force removing device 3 shown in FIG. 2 as a fixed beam 19 not via the hydraulic cylinder 25. This is to perform reaction force collection work. In this case, the fixed beam 19 has its base end side fixed to the base frame 7 of the casing driver 2 by a pin or the like, and has a reaction force receiving portion 18 integrally formed on the tip end side as shown in FIG. Further, the reaction force receiving portion 18 is provided with a reaction force receiving bracket 21.

In this embodiment, the fixed beam 19 described above is used to perform a work similar to the first rotary reaction force collection work of the present invention described above, and the boundary of the construction site is within the allowable construction range. Moreover, the casing can be pushed in, and the casing pushed near the boundary within the construction allowable range of the construction site can be pulled out from the ground. Further, according to the method of this embodiment, since the rotary reaction force removing device 3 can be constituted by the fixed beam 19, the number of its components is small and its management is simple.

Also in this embodiment, the fixed type beam 19 constituting the rotary reaction force collecting device 3 is shown in FIGS. 1 and 2 as in the third rotary reaction force collecting method of the present invention described above. It is also possible to dispose them symmetrically with respect to the casing driver 2 as shown, and to receive the rotational reaction force by these rotational reaction force taking devices 3.

According to this embodiment, it is possible to obtain the same effect as the above-described third method for removing the rotational reaction force of the present invention.

In each of the above-described embodiments, the example in which the rotational reaction force collecting device 3 is symmetrically arranged with respect to the casing driver 2 has been described, but the rotational reaction force collecting device 3 is provided on one side of the casing driver 2. It is also possible to provide only. In this case, it is effective when the rotation reaction force does not act so much and when the casing driver 2 has to be installed in the corner of the site.

Further, in each of the above-described embodiments, in order to receive the rotational reaction force generated by the casing driver, a fork-shaped tip of the beam forming the rotational reaction force installation device provided in the casing driver is formed. It is preferable to receive the rotational reaction force acting on the reaction force receiving portion in a direction opposite to the rotational direction of the casing by abutting the reaction force receiving portion on the crawler of the working machine.

The reaction force receiving portion 18 at the tip of the beam 19 may be integral with the beam 19.

[0054]

[Effect of the invention]

 As described above in detail, according to claim 1 of the present invention, the rotational reaction force of the casing driver can be received by the weight of the working machine by contacting the reaction force receiving portion with the crawler of the working machine. Rotational reaction force can be easily obtained without attachment such as pin connection, and workability can be greatly improved. Moreover, it is not necessary to install the crawler outside the construction site, and the casing driver can be installed at the border of the construction site within the allowable construction range. As a result, it is possible to push the casing close to the boundary within the construction allowable range of the construction site, and it is also possible to pull out the casing pushed near the boundary within the construction allowable range of the construction site from the ground.

Further, according to the invention of claim 3, in addition to the effect of the invention of claim 1 described above, since the rotation reaction force is received by both side portions of the fork-shaped reaction force receiving portion, the swinging motion is caused. A rotary reaction force can be taken in a rotary or rotary casing driver. Further, according to claim 4, by swinging the beam to bring the reaction force receiving portion into contact with the side surface of the crawler, the side surface of the reaction force receiving portion in the rotary reaction force collecting device and the side surface of the crawler in the working machine are separated. The workability is improved because the position alignment work is easy.

Further, according to the invention of claim 5, the side surfaces of the crawlers are respectively brought into contact with the reaction force receiving portions at the tip of the beam symmetrically provided on the casing driver. In addition to the effect of, the rotational reaction force acting on the crawler of the excavator from the rotational reaction force removal device can be distributed to the two rotational reaction force removal devices. The size can be reduced, the rotation reaction force removing device can be downsized, and the reliability of the rotation reaction force removing operation can be improved. , Its components are few and its management is easy.

According to the invention of claim 6, in addition to the effect of the invention of claim 5 described above, the effect of the invention of claim 4 described above can be obtained.

[Brief description of drawings]

FIG. 1 is a front view of a casing driver equipped with a rotational reaction force removing device used in a rotational reaction force removing method for a casing driver of the present invention.

FIG. 2 is a plan view of the casing driver shown in FIG.

[Explanation of symbols]

 1: Casing 2: Casing driver 3: Rotational reaction force removing device 4: Excavator 5: Crawler 18: Reaction force receiving portion 19: Beam 21: Bracket 25: Hydraulic cylinder

Claims (1)

[Utility model registration claims] 1. A method of receiving a rotational reaction force generated by a casing driver, wherein a crawler of a working machine is moved toward a reaction force receiving portion of a beam forming a rotational reaction force removing device provided in the casing driver, Abutting the crawler on the reaction force receiving portion,
A method for taking a rotational reaction force of a casing driver, wherein the rotational reaction force is received by the weight of the working machine.