JPH04122792U - tubing equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the casing tube from sinking due to its own weight during pushing and pulling operations of the casing tube. [Structure] A sub-chuck device 14 is provided between a base frame 2 and an elevating frame 3 of a tubing device 1.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention enables the creation of large-diameter piles in all-casing construction methods such as civil engineering foundation work. Regarding tubing equipment that pushes and pulls out casing tubes for Ru.

0002

[Conventional technology]

In the all-casing construction method, the casing is gripped by the rotary drive device of the tubing equipment. While rotating the single tube, lower the elevating frame using the elevating cylinder. The earth and sand inside the casing tube is excavated while pushing it into the ground. And multiple Connect the casing tubes until the desired depth is reached. After pushing in the tube, excavating the inside of the tube, and performing the prescribed measures such as inserting reinforcing bars, the tube is While pouring concrete into the pipe, the casing chip held by the rotary drive device The tube is gradually pulled out using an elevating cylinder to create a cast-in-place pile.

0003 At this time, if you pull out the casing tube for one stroke of the cylinder, it will rotate once. Release the chuck of the rolling drive device, lower the lifting frame, and place it under the casing tube. After gripping the part again, use the lifting cylinder to raise the lifting frame again and pull it in sequence. The casing tube is removed when the chuck of the rotary drive device is opened. A crane was used to lift the top end of the building to prevent it from sinking under its own weight.

0004 The cranes used for this type of construction usually carry tubing equipment. The one with the ability to move the main body and excavate inside the tube is selected.

[0005]

[Problem that the idea aims to solve]

However, in recent years, the number of large-diameter, deep-pile piles has increased, and When carrying out construction, the weight of the added casing tube will be considerably heavy, especially, When pulling out the casing tube, the capacity of conventional cranes is insufficient. This required a larger crane. Also, depending on the geology If the chuck of the rotary drive device is opened while the casing tube is being pushed in, the casing will The sing tube may sink under its own weight.

[0006] Therefore, the present invention was developed to remove the casing tube without using a crane with extra capacity. To provide a tubing device that can reliably prevent sinking due to its own weight. The purpose is to

[0007]

[Means to solve the problem]

In order to achieve the above objective, the present invention has developed a rotary drive that grips and rotates the casing tube. The rotary drive device and the elevating frame that rotatably supports the rotary drive device are attached to the base frame. The casing tube is moved up and down by a cylinder installed upright on top of the casing tube. In the tubing device that performs drawing, the base frame and the rotational drive device A sub-chuck device for holding the casing tube is provided between the casing tube and the casing tube. It is a feature.

[0008]

[Effect]

With this configuration, when opening the chuck of the rotary drive device, the support Grip the casing tube with a butch device and check the weight of the casing tube. Reliably prevents subsidence due to

[0009]

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings.

0010 The tubing device 1 includes a base frame 2 and a slider for raising and lowering an elevating frame 3. A strike cylinder 4 is installed upright, and a rotation drive device 5 is rotatably supported on the lifting frame 3. ing.

[0011] The rotation drive device 5 is a ring-shaped rotating body rotatably supported by the lifting frame 3. 6, a hydraulic motor 7 that rotates the rotary body 6, and a main body provided on the inner circumference of the rotary body 6. and chuck 8.

0012 The main chuck 8 is suspended by a ring-shaped upper frame 9 and the upper frame 9. and a wedge-shaped chuck member 10 that rotatably supports the upper frame 9. The support frame 11 includes a main chuck cylinder 12 provided on the lifting frame 3. The main chuck cylinder 12 is retracted and the support frame 9 is moved up and down. When descending, the chuck member 10 moves downward on the inner surface of the rotary body 6 to reduce its diameter and close the chuck member 10. The casing tube 13 inserted into the inside of the hook member 10 is grasped.

[0013] The tubing device 1 configured in this way can push the casing tube 13 When checking, the main chuck cylinder 12 is retracted and the chuck member 10 closes the casing. While holding the tube 13 and rotating the rotary drive device 5 with the hydraulic motor 7, Retract the thrust cylinder 4, lower the elevating frame 3, and release 1 stroke of the thrust cylinder 4. Push the casing tube 13 into the ground.

[0014] After the casing tube 13 has been pushed in for one stroke, the main chuck Extend the handle 12 and pull up the chuck member 10 to open the casing tube 13. Then, extend the thrust cylinder 4, raise the elevating frame 3, and then open the main chuck again. Retract the cylinder 12 and grip the casing tube 13 with the chuck member 10, Push in the casing tube 13 in the same way as above, and repeat this to remove the casing tube. A plurality of groove tubes 13 are connected together and pushed to a predetermined depth.

[0015] The tubing device 1 also includes a lower part of the elevating frame 3 and a base frame. A sub chuck device 14 is provided between the two.

[0016] This sub-chucking device 14 includes a chuck member 15 that includes three arcuate flat plates 15a, 15b and 15c are connected, and the scissor link 16 is attached to the flat plates 15a and 15c. Attachment, shrink the chuck member 15 by expanding the sub-chuck cylinder 17, The casing tube 13 inserted into the chuck member 15 is gripped.

[0017] The sub-chuck cylinder 17 is provided outside the lifting frame 3. Therefore, together with the flat chuck member 15, the sub chuck device 14 can be raised and lowered. It can be disposed in a narrow gap between the lower part of the frame 3 and the base frame 2.

[0018] Hydraulic pressure for operating the main chuck cylinder 12 and sub chuck cylinder 17 As shown in FIG. 3, the circuit 18 connects the main channel from the A port of the directional control valve 19. The circuit 20 to the retraction side of the chuck cylinder 12 is connected to the retraction side of the sub chuck cylinder 17. Connect the circuit 21 to the circuit 21 and install the sequence and check valve 22 in the circuit 21. It's on.

[0019] In addition, the circuit 23 from the B port of the directional control valve 19 is branched to one circuit 24. of the main chuck cylinder 12 through the sequence and check valve 25. Connect to the extension side and connect the other circuit 26 to the sub-chuckshaft via the stop valve 27. It is connected to the extension side of the cylinder 17.

[0020] With this configuration, when pulling out the casing tube 13, oil is removed. Pressure oil from the pressure pump 28 is routed from the A port of the directional control valve 19 through the circuit 20. When the in-chuck cylinder 12 is sent to the retracting side, the main chuck cylinder 12 retracts. The main chuck 8 grips the casing tube 13.

[0021] When the casing tube 13 is gripped and the pressure inside the circuit 20 exceeds a predetermined level, The sequence and check valve 22 opens and pressure oil flows through the circuit 21 to the sub-chip. It is sent to the contraction side of the chuck cylinder 17, and the sub-chuck cylinder 17 is compressed and the sub-chuck cylinder 17 is The chuck device 14 is opened.

[0022] In this state, the thrust cylinder 4 is extended to raise the elevating frame 3, and the thrust cylinder 4 is extended. Pull out the casing tube 13 by one stroke of the cylinder 4.

[0023] Next, when the directional control valve 19 is switched to the B port, pressure oil flows through the circuit 26 to the sub-port. It is sent to the extension side of the chuck cylinder 17, and the sub-chuck cylinder 17 is extended and supported. A grip device 14 grips the casing tube 13.

[0024] When the casing tube 13 is gripped and the pressure inside the circuit 26 exceeds a predetermined level, Sequence and check valve 25 opens and pressurized oil flows through circuit 24 to the main It is sent to the extension side of the chuck cylinder 12, and the main chuck cylinder 12 is extended. Main chuck 8 is released.

[0025] In this state, the thrust cylinder 4 is retracted, the elevating frame 3 is lowered, and the direction is again Switch the control valve to send pressure oil from the A port to the contraction side of the main chuck cylinder 12. While holding the casing tube 13 with the main chuck 8, Open the locking device 14 and move the case for one stroke of the thrust cylinder 4 in the same way as above. Pull out the single tube 13.

[0026] When one casing tube 13 is pulled out, the lower casing tube 13 is pulled out. Release the connection with the tube 13, lift it up with a crane, and attach it to the next casing tube 13. Pull it out.

[0027] As mentioned above, when pulling out the casing tube 13, the main chuck 8 and the sub chuck device 14 always grip the casing tube 13. Therefore, it is possible to reliably prevent the casing tube 13 from sinking due to its own weight.

[0028] Therefore, the crane that lifts the casing tube 13 also lifts one casing tube. It may be of the ability to lift the holding tube 13.

[0029] Note that when pushing the casing tube 13, the weight of the casing tube 13 is supported by the supporting force of the ground, the sub-chuck device 14 is opened. With the valve released, close the stop valve 27 of the circuit 26 to close the main chuck. The casing tube 13 can sink due to its own weight. In such a case, open the stop valve 27 and proceed as in the case of extraction described above. Either the main chuck 8 or the sub chuck device 14 always holds the casing tube. 13 to prevent the casing tube 13 from sinking.

[0030]

[Effect of the idea]

As described above, the present invention combines the lifting frame and base frame of tubing equipment. A sub-chuck device is installed between the Since the casing tube can be gripped by the chuck device, the casing It is possible to reliably prevent the tube from sinking due to its own weight.

[Brief explanation of drawings]

[Fig. 1] Partially sectional front view of a tubing device showing an embodiment of the present invention

[Figure 2] II-II arrow view in Figure 1

[Figure 3] Hydraulic circuit diagram of main chuck and sub chuck device

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1...Tubing device, 2...Base frame, 3...Elevating frame, 4...Thrust cylinder, 5...Rotation drive device,
8... Main chuck, 12... Main chuck cylinder,
13...Casing tube, 14...Sub chuck device,
17...Sub chuck cylinder, 18...Hydraulic circuit diagram of main chuck and sub chuck device

Claims (1)

[Scope of utility model registration request] Claim 1: A rotary drive device that grips and rotates a casing tube, and an elevating frame that rotatably supports the rotary drive device, are raised and lowered by cylinders erected on a base frame to rotate and push the casing tube. A tubing device that performs drawing, characterized in that a sub-chuck device for holding the casing tube is provided between the base frame and the rotation drive device.