Launching device

Abstract

The present invention provides a launching device that prevents damage to the hose supplying fluid to the swivel joint, even when a swivel joint is installed in the launching device. [Solution] The driving device 10 has a cylindrical body 14 through which a fluid supply pipe 12 is inserted, and the lower end 16 of the cylindrical body 14 is inserted into the upper end 64 of the tubular pile 40b to connect it to the tubular pile 40b. The driving device 10 includes a support member 20 to which the lower end 21 is connected at a position horizontally offset from the center C of the upper surface 24 of the cylindrical body 14, and which supports the swivel joint 22 to which the fluid supply pipe 12 is connected so that it is located above the center of the cylindrical body 14. When the press-in machine 30 gripping the driving device 10 is rotating and pressing in the tubular pile 40b, the support member 20 rotates in accordance with the rotation of the cylindrical body 14, while the hose 26 that supplies fluid to the swivel joint 22 connected to the support member 20 does not rotate.

Description

Technical Field

[0001] The present invention relates to a driving-down device.

Background Art

[0002] When a tubular pile is rotationally pressed by a press-in machine, a driving-down device having a cylindrical body may be used to press the tubular pile to a planned depth.

[0003] Patent Document 1 describes a driving-down device in which a swivel joint is arranged on the upper surface and fluid is supplied inside the tubular pile through the swivel joint. In the driving-down device described in Patent Document 1, the attachment position of the swivel joint is offset from the center of the driving-down device. This is, for example, in order to prevent the swivel joint from interfering with the insertion of the angle steel through the insertion hole formed in the central region of the driving-down device.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, at the arrangement position of the swivel joint described in Patent Document 1, along with the rotational press-in of the tubular pile, the swivel joint also orbits around the axis of the tubular pile together with the driving-down device. Along with the orbiting of the swivel joint, the hose for supplying fluid to the swivel joint also moves, and there is a possibility that the hose may be damaged due to friction or snagging between the hose and other structures.

[0006] Therefore, the present invention aims to provide a launching device that can prevent damage to the hose supplying fluid to the swivel joint, even when a swivel joint is installed in the launching device. [Means for solving the problem]

[0007] The present invention relates to a driving device having a cylindrical body through which a first fluid supply pipe is inserted, and connecting to a tubular pile by inserting the lower end of the body into the upper end of the tubular pile, comprising: an insertion hole formed in the central region of the body through which a closing member that closes the space between the press-driven tubular piles is inserted and gripped; and a support member whose lower end is connected to a position horizontally offset from the center of the upper surface of the body, and which supports a swivel joint to which the first fluid supply pipe is connected so that it is located above the center of the body, wherein when a press-in machine gripping the driving device is rotating and press-driving the tubular pile, the support member rotates in accordance with the rotation of the body, while the second fluid supply pipe, which is connected to the swivel joint supported by the support member and supplies fluid to the first fluid supply pipe, does not rotate.

[0008] In this configuration, a swivel joint having a rotating joint is positioned above the center of the driving device by a support member. Therefore, even if the driving device rotates as the tubular pile is driven in, the second fluid supply pipe connected to the swivel joint supported by the support member does not rotate.

[0009] Therefore, with this configuration, the hose supplying fluid to the swivel joint does not move as the tubular pile to which the driving device is connected is rotated and pressed in, thus preventing damage to the hose supplying fluid to the swivel joint.

[0010] The launching device of the present invention may include a retraction mechanism in which the support member retracts the swivel joint from above the center of the main body. With this configuration, when a blocking member is embedded through the insertion hole of the launching device, the swivel joint is retracted from above the center of the launching device, so the swivel joint does not obstruct the embedding of the blocking member.

[0011] The launching device of the present invention comprises a support member which includes a support column extending upward from the offset position and an arm member extending from the upper end of the support column toward the center of the main body, wherein the arm member may be connected to the upper end of the support column at one end and to the swivel joint at the other end such that the swivel joint is located above the center of the main body. This configuration prevents damage to the hose that supplies fluid to the swivel joint.

[0012] In the present invention, the downward-firing device may have one end of the arm member connected to the upper end of the support column so as to be rotatable in the horizontal direction. With this configuration, when embedding the occlusion member through the insertion hole of the downward-firing device, the swivel joint is moved away from the center of the downward-firing device by rotating the arm member, so that the swivel joint does not obstruct the embedding of the occlusion member. [Effects of the Invention]

[0013] According to the present invention, even if a swivel joint is installed in the launching device, it is possible to prevent damage to the hose that supplies fluid to the swivel joint. [Brief explanation of the drawing]

[0014] [Figure 1] This is a side view of the press-in machine gripping the downward-driving device of this embodiment. [Figure 2] This is a side view of the launching device of this embodiment. [Figure 3]This is a top view of the driving device of this embodiment, where (A) shows the position of the swivel joint when a tubular pile is rotated and pressed in, and (B) shows the retracted position of the swivel joint when a closing member is inserted into the insertion hole of the driving device. [Figure 4] This diagram shows the retracted position of the swivel joint of the launching device in another embodiment, where (A) shows the support member lying on its side and (B) shows the support column rotating. [Figure 5] This is a side view of a launching device of another embodiment. [Modes for carrying out the invention]

[0015] Embodiments of the present invention will be described below with reference to the drawings. The embodiments described below are merely examples of how the present invention can be implemented, and the present invention is not limited to the specific configurations described below. In implementing the present invention, specific configurations may be adopted as appropriate depending on the embodiment.

[0016] The driving device 10 of this embodiment will be described with reference to Figures 1 to 3. Figure 1 is a side view of the press-in machine 30 gripping the driving device 10. Figure 2 is a side view of the driving device 10. Figure 3 is a top view of the driving device 10.

[0017] The press-fitting machine 30 comprises a plurality of clamping devices 32 provided at the bottom of a saddle 31, a slide base 33 that is movable back and forth on the saddle 31, a mast 34 that is pivotably erected on the slide base 33, a lifting mechanism 35, and a chuck device 36 supported by the mast 34 via the lifting mechanism 35. The operation of the lifting mechanism 35 raises and lowers the chuck device 36 relative to the mast 34, and therefore to the clamping devices 32.

[0018] The press-in machine 30 grips the inner peripheral surface of an existing tubular pile 40a press-fitted into the ground with a clamping device 32 to obtain a reaction force from the tubular pile 40a, and rotationally press-fits a new tubular pile 40b into the ground. Note that the press-in machine 30 shown in FIG. 1 rotationally press-fits the tubular pile 40b by gripping a driving-down device 10 connected to the new tubular pile 40b with a chuck device 36 and rotating the driving-down device 10.

[0019] The driving-down device 10 has a cylindrical main body (hereinafter referred to as the "cylindrical main body") 14 into which a fluid supply pipe 12, which is a first fluid supply pipe, is inserted. The lower end portion 16 of the cylindrical main body 14 is inserted into the upper end portion 42 of the tubular pile 40b to be connected to the tubular pile 40b. Note that the driving-down device 10 is provided with a clamping device 18 for gripping the inner peripheral surface of the tubular pile 40b at the lower end portion 16 as a connecting means to the tubular pile 40b.

[0020] The driving-down device 10 of the present embodiment is provided with a swivel joint 22 having a rotary joint via a support member 20.

[0021] The support member 20 has its lower end portion 21 connected to a position horizontally offset from the center C of the upper surface 24 of the cylindrical main body 14, and supports the swivel joint 22 to which the fluid supply pipe 12 is connected so as to be located above the center of the cylindrical main body 14.

[0022] The offset position referred to here is a position separated from the center C of the cylindrical main body 14 by a predetermined distance, for example, a position on the outer peripheral side of an insertion hole 70 formed in the central region of the cylindrical main body 14. Details of the insertion hole 70 will be described later.

[0023] A hose 26, which is a second fluid supply pipe, is connected to the swivel joint 22 from a fluid supply device (not shown), and the fluid from the hose 26 is supplied to the fluid supply pipe 12. The fluid of the present embodiment is, for example, water as an example.

[0024] In this embodiment, the swivel joint 22 is connected to the fluid supply pipe 12 and the support member 20 at its lower end surface 28. The lower end surface 28 of the swivel joint 22 is the surface facing the upper surface 24 of the cylindrical body 14. The hose 26 that supplies fluid to the swivel joint 22 is connected to the side surface 29 of the swivel joint 22.

[0025] The fluid supply pipe 12 connected to the swivel joint 22 is guided into the insertion hole 52 of the cylindrical body 14. The lower end portion 21 of the support member 20 is connected to the cylindrical body 14 around the insertion hole 52. In other words, the insertion hole 52 is formed at the offset position described above.

[0026] Furthermore, the fluid supply piping 12 is connected to the pipe 56 via a pipe fitting 54 inside the tubular pile 40b. The pipe 56 is fixed to the inner surface of the tubular pile 40b along the axial direction of the tubular pile 40b. The fluid supply piping 12 supplies fluid (water) through the pipe 56, for example, to drive a drill bit used for excavating the ground.

[0027] The support member 20 of this embodiment comprises a support column 60 and an arm member 62.

[0028] The support column 60 extends upward from a position horizontally offset from the center C of the upper surface 24 of the cylindrical body 14. In this embodiment, as an example, the support column 60 extends vertically from the upper surface 24 of the cylindrical body 14.

[0029] The arm member 62 extends from the upper end 64 of the support column 60 toward the center above the cylindrical body 14. In this embodiment, the arm member 62 extends horizontally relative to the upper surface 24 of the cylindrical body 14, as an example. In this embodiment, the upper end 64 of the support column 60 is connected to one end of the arm member 62, and the swivel joint 22 is connected to the other end so that it is positioned above the center of the cylindrical body 14.

[0030] A through hole 66 is formed in the arm member 62 where the swivel joint 22 is connected. The fluid supply pipe 12 connected to the swivel joint 22 is inserted into the through hole 66 and guided into the insertion hole 52 of the cylindrical body 14. The lower end of the support column 60 is the lower end 21 of the support member 20, and the support column 60 is connected to the cylindrical body 14 above the insertion hole 52.

[0031] Furthermore, in this embodiment, when the press-in machine 30, which grips the press-in machine 10, is rotating and pressing in the tubular pile 40b, the support member 20 rotates in accordance with the rotation of the cylindrical body 14, while the hose 26 that supplies fluid to the swivel joint 22 connected to the support member 20 does not rotate.

[0032] In other words, since the swivel joint 22 having a rotating joint is positioned above the center of the driving device 10 by the support member 20, even if the driving device 10 rotates as the tubular pile 40b is rotated and pressed in, the hose 26 connected to the swivel joint 22 supported by the support member 20 does not rotate.

[0033] Therefore, with the driving device 10 of this embodiment, the hose 26 that supplies fluid to the swivel joint 22 does not move as the tubular pile 40b is rotated and pressed into place. As a result, the driving device 10 of this embodiment can prevent the hose 26 from being damaged by friction with other structures or the like.

[0034] Furthermore, as shown in Figure 3(A), in this embodiment, the driving device 10 has a through hole 70 formed in the central region of the cylindrical body 14 through which a closing member is inserted to close the pressed-in tubular piles 40a, 40a, and to grip them. The closing member inserted into the driving device 10 of this embodiment is used for earth retention and watertightness, and an example is angle steel. By changing the shape of the through hole 70, other closing members such as H-shaped steel or small-diameter steel pipes may be inserted. Inside the through hole 70, a chuck mechanism is provided that can expand and contract in accordance with the expansion and contraction of a hydraulic cylinder device, and the closing member inserted into the through hole 70 is gripped by this chuck mechanism.

[0035] Thus, in this embodiment, the launching device 10 is structured so that the fluid supply pipe 12 passes through the inside of the cylindrical body 14 through the insertion hole 52, and the closing member passes through the inside of the cylindrical body 14 through the insertion hole 70, with the fluid supply pipe 12 and the closing member each passing through separate insertion holes. This prevents the fluid supply pipe 12 from coming into contact with the closing member, and also prevents the fluid supply pipe 12 from getting caught in the chuck mechanism that moves to grip the closing member.

[0036] Here, if the swivel joint 22 is located above the center of the launching device 10, the closing member cannot be inserted into the insertion hole 70 of the launching device 10. For this reason, the support member 20 in this embodiment is equipped with a retraction mechanism that moves the swivel joint 22 away from above the center of the cylindrical body 14.

[0037] In this embodiment, one end of the arm member 62 is connected to the upper end 64 of the support column 60 so as to be rotatable in the horizontal direction. Figure 3(B) shows the retracted position of the swivel joint 22 when the closing member is inserted into the insertion hole 70 of the launching device 10. As shown in Figure 3(B), as the arm member 62 rotates, the swivel joint 22 retracts from above the center of the cylindrical body 14.

[0038] Thus, when inserting the blocking member into the insertion hole 70 of the launching device 10, the swivel joint 22 is moved away from the center above the launching device 10 by rotating the arm member 62, so that the swivel joint 22 does not obstruct the insertion of the blocking member. Furthermore, by moving the arm member 62 while the hose 26 is still attached to the swivel joint 22, it becomes unnecessary to remove the hose 26 in order to insert the blocking member into the launching device 10, thus shortening the work process.

[0039] On the other hand, if the closure member is to be a member that can be rotated and pressed into a small-diameter steel pipe or the like, the hose 26 may be removed, or the swivel joint 22 may be removed from the arm member 62, or both, to prevent the hose 26 from becoming entangled with the rotating closure member.

[0040] The method for driving a tubular pile 40b using the driving device 10 of this embodiment described above is as follows.

[0041] Step 1: The press-in machine 30 grips the driving device 10 inserted into the tubular pile 40b using the chuck device 36.

[0042] Step 2: Using a support member 20 whose lower end portion 21 is connected to a position horizontally offset from the center of the upper surface 24 of the cylindrical body 14, the swivel joint 22 is positioned above the center of the cylindrical body 14.

[0043] Step 3: While supplying fluid to the inside of the tubular pile 40b from the fluid supply pipe 12 connected to the swivel joint 22, the tubular pile 40b is rotated and pressed into place by the press-in machine 30 which is gripping the driving device 10.

[0044] Step 4: When inserting the closing member into the insertion hole 70 formed in the central region of the cylindrical body 14, the swivel joint 22, which is supported by the support member 20, is moved away from above the center of the cylindrical body 14.

[0045] Step 5: The chuck device 36 of the press-in machine 30 is moved to the press-in position of the sealing member for watertight or earth retention and positioned.

[0046] Step 6: Insert the closing member into the insertion hole 70 of the launching device 10 and grip it.

[0047] Step 7: The press-fitting machine 30 press-fits the sealing member.

[0048] Although the present invention has been described above using the embodiments described above, the technical scope of the present invention is not limited to the scope described in the embodiments above. Various modifications or improvements can be made to the embodiments above without departing from the spirit of the invention, and such modified or improved forms are also included in the technical scope of the present invention.

[0049] The arm member 62 in the above embodiment is replaceable, and by replacing the arm member 62, it may be possible to accommodate tubular piles 40b of different steel pipe diameters. In addition, multiple connection points with the support column 60 may be provided on one end of the arm member 62.

[0050] In the above embodiment, a configuration was described in which one end of the arm member 62 is connected to the support column 60 so as to be rotatable in the horizontal direction as a retraction mechanism, but the present invention is not limited thereto. For example, as shown in the top view of the launching device 10 in Figure 4(A), the retraction mechanism may be a structure in which the support column 60 is laid on its side so as to be parallel to the upper surface 24 of the cylindrical body 14. With such a retraction mechanism, the support column 60 and the arm member 62 can be integrated, and the shape of the support member 20 can be simplified. Also, as shown in the side view of the launching device 10 in Figure 4(B), the lower end 21 of the support column 60 may be rotatable relative to the upper surface 24 of the cylindrical body 14. With such a retraction mechanism, even if the swivel joint 22 is moved to the retracted position, the twisting of the fluid supply pipe 12 below the swivel joint 22 is reduced, and the load on the fluid supply pipe 12 is reduced.

[0051] In the above embodiment, a configuration in which the support member 20 is composed of a support column 60 and an arm member 62 has been described, but the present invention is not limited thereto. For example, as shown in the side view of the launching device 10 in Figure 5, the support member 20 may be an inclined member 80 that is inclined from the insertion hole 52 of the cylindrical body 14 toward the center upward of the cylindrical body 14. The swivel joint 22 is connected to the upper end 82 of the inclined member 80. In the example in Figure 5, a fluid supply pipe 12 is inserted inside the inclined member 80. By making the support member 20 an inclined member 80, the arm member 62 becomes unnecessary, making it possible to reduce the number of parts and lower costs. Furthermore, as a retraction mechanism in this configuration, the lower end 84 of the inclined member 80 may be rotatable relative to the upper surface 24 of the cylindrical body 14, or the inclined member 80 may be structured to lie on its side so that it is parallel to the upper surface 24 of the cylindrical body 14.

[0052] In the above embodiment, a configuration in which the fluid supplied by the fluid supply pipe 12 is water was described, but the present invention is not limited thereto, and the fluid supplied by the fluid supply pipe 12 may be other fluids such as compressed air. [Explanation of Symbols]

[0053] 10. Downward launching device 12 Fluid supply piping (1st fluid supply piping) 14. Cylindrical body (body) 20 Support members 22 Swivel Joints 26. Hose (Second fluid supply piping) 30 Press-fitting machine 40b tubular pile 60 pillars 62 Arm Member 70 Through hole

Claims

1. A driving device having a cylindrical body through which a first fluid supply pipe is inserted, and connecting to a tubular pile by inserting the lower end of the body into the upper end of the tubular pile, A closing member is inserted into the central region of the main body, which closes the gap between the press-fitted tubular piles, and a through-hole is provided for gripping. The lower end of the swivel joint, to which the first fluid supply pipe is connected, is connected and is supported by a support member that is positioned above the center of the main body, with the swivel joint being connected to the swivel joint being positioned above the center of the main body. When the press-in machine gripping the driving device is rotating and pressing in the tubular pile, the support member rotates in accordance with the rotation of the main body, while the second fluid supply pipe, which is connected to the swivel joint supported by the support member and supplies fluid to the first fluid supply pipe, does not rotate. Launching device.

2. The launching device according to claim 1, wherein the support member is provided with a retraction mechanism that moves the swivel joint away from the center above the main body.

3. The aforementioned support member is A support column extending upward from the aforementioned offset position, An arm member extending from the upper end of the support column toward the center of the main body, Equipped with, The arm member is connected to the upper end of the support column at one end, and the swivel joint is connected to the other end such that it is positioned above the center of the main body. A launching device according to claim 1 or claim 2.

4. The downward launching device according to claim 3, wherein one end of the arm member is connected to the upper end of the support column so as to be rotatable in the horizontal direction.

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