JPH0439348Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an opening/closing drive device for a casing tube tightening device in a boring machine.

(Prior art) A conventional boring machine is explained with reference to Figs. 3 and 4. 1 is a casing tube, 2 is a frame installed on the ground, 2a is a lifting guide device provided on the frame 2, and 3 is a turning device. , the swing device 3 includes an elevating member 3a guided in elevating and lowering by the elevating guide device 2a, a hydraulic motor 3b installed on the elevating member 3a, and a hydraulic motor 3.
A gear 3c attached to the output shaft of b, a main bearing 3d with external teeth that meshes with the gear 3c and is rotatably supported on the elevating side member 3a, and a main bearing 3 with external teeth.
and a swing-side member 3e rotatably supported by d.

Reference numeral 4 denotes a tightening device for the casing tube 1, and the tightening device 4 includes a plurality of arcuate members 4a, pins 4b for pivotally supporting each of the arcuate members 4a, and opening and closing of each of the arcuate members 4a. It is composed of an opening/closing tightening jack 4c. The dotted line connecting a and b is
The hydraulic hose piping of the opening/closing tightening jack 4c is shown.

Reference numeral 5 denotes a push jack interposed between the bottom of the frame 2 and the lifting side member 3a of the swing device 3, and the opening/closing tightening jack 4c is actuated to tighten the casing tube 1 by the tightening device 4. rear,
The hydraulic motor 3b is driven and its rotation is controlled by the gear 3c→
The information is transmitted from the external toothed main bearing 3d to the tightening device 4 to rotate the tightening device 4 and the casing tube 1, while operating the push jack 5 to rotate the casing tube via the lifting side member 3a of the rotation device 3. Push in 1.

At this time, an excavator (not shown) such as a hammer grab is raised and lowered into the casing tube 1 using a crane or the like to excavate and remove the earth and sand in the casing tube 1, thereby excavating the shaft.

Furthermore, since the opening/closing tightening jack 4c is attached to the swinging side member 3e of the swinging device 3, when attaching the tightening device 4 to the casing tube 1,
While stopping the swing device 3, a self-seal coupling or the like is performed to connect the piping installation port b of the opening/closing tightening jack 4c and the installation port a of the hydraulic hose piping extending from the pressure oil supply source (not shown) on the non-swivel side. After the connection is made manually using the casing tube 1, the opening/closing tightening jack 4c is operated to close the tightening device 4 and attach it to the casing tube 1.

Furthermore, when removing the tightening device 4 from the casing tube 1, while stopping the rotating device 3, the opening/closing tightening jack 4c is connected to the piping attachment port b and the pressure oil supply source (not shown) on the non-swivel side. After manually connecting the hydraulic hose piping to the mounting port a using a self-sealing coupling or the like, operate the opening/closing tightening jack 4c to open the tightening device 4 and remove it from the casing tube 1. ing.

(Problems to be Solved by the Invention) In the conventional boring machine shown in FIGS. 3 and 4, the opening/closing tightening jack 4c of the tightening device 4 is attached to the swinging side member 3e of the swinging device 3.
When attaching the tightening device 4 to the casing tube 1, the swing device 3 is stopped, and the hydraulic hose extending from the piping attachment port b of the opening/closing tightening jack 4c and the pressure oil supply source (not shown) on the non-swivel side is After manually connecting the fitting port a of the piping using a self-sealing coupling or the like, the opening/closing tightening jack 4c is operated, the tightening device 4 is closed, and the fitting is attached to the casing tube 1. Furthermore, when removing the tightening device 4 from the casing tube 1, while stopping the rotating device 3, the opening/closing tightening jack 4c is connected to the piping attachment port b and the pressure oil supply source (not shown) on the non-swivel side. After connecting the mounting port a of the hydraulic hose piping manually using a self-sealing coupling or the like, the opening/closing tightening jack 4c is operated to open the tightening device 4, and the casing tube 1 is closed.
It is necessary to remove the tightening device 4 from the holder, which requires manpower, is dangerous, and requires a lot of time to attach and detach the tightening device 4.
Poor efficiency. In addition, connecting the pipe attachment port b of the opening/closing tightening jack 4c provided on the swing device 3 side to the hydraulic hose pipe of the pressure oil supply source on the non-swivel side using a rotary joint or the like is not recommended because the device becomes larger. To,
There was a problem of increasing production costs.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems by attaching the elevating side member of the swivel device to the frame so that it can rise and fall, and attaching the swivel side member of the swivel device to the elevating side member. In the boring machine, a tightening device for tightening the casing tube is attached to the rotating side member, and a pushing jack for pushing the casing tube into the ground is interposed between the frame and the lifting side member. A ring gear is attached to the elevating side member of the device, a hydraulic pump is attached to the tightening device, the gear attached to the input shaft of the hydraulic pump meshes with the ring gear, and the pressure oil supply pipe from the hydraulic pump is connected to the tightening device. It is characterized by being connected to the tightening jack for opening and closing the attached device.

The purpose of the present invention is to provide a tightening device for casing tubes in boring machines that allows the tightening device to be attached to and removed from the casing tube safely and quickly, without increasing the size of the device or increasing manufacturing costs. The object of the present invention is to provide an opening/closing drive device for an attached device.

(Function) The opening/closing drive device for the casing tube tightening device in the boring machine of the present invention is configured as described above, and drives the swinging hydraulic motor provided on the lifting side member of the swinging device to control its rotation. The signal is transmitted to the swing side member of the swing device → ring gear → gear → hydraulic pump, and the hydraulic pump is driven to generate pressure oil. At this time, the switching valve installed in the hydraulic circuit connecting the hydraulic pump and the tightening jack for opening and closing the tightening device is switched from the neutral position to the tightening operating position, and the pressure oil generated in the hydraulic pump is transferred to the switching valve. is supplied to the tightening side pressure chamber of the opening/closing tightening jack, and the opening/closing tightening jack is operated in the tightening direction to attach the tightening device to the casing tube. Further, when the tightening device is removed from the casing tube, the hydraulic pump generates pressure oil in the same manner as above. At this time, the switching valve is moved from the neutral position toward the release operating position, and the pressure oil generated in the hydraulic pump is supplied to the release side pressure chamber of the opening/closing tightening jack through the switching valve, and in the release direction to remove the tightening device from the casing tube.

(Example) Next, the opening/closing drive device of the casing tube tightening device in the boring machine of the present invention is
This will be explained using an embodiment shown in FIG. 2. 1 is a casing tube. Note that this example also includes the third
As shown in the figure, a frame 2 installed on the ground,
Although there is a lift guide device 2a provided on the same frame 2, illustration thereof is omitted.

Reference numeral 3 denotes a swing device, and the swing device 3 includes an elevating side member 3a guided in elevating and lowering by the elevating guide device 2a, a hydraulic motor 3b installed on the elevating side member 3a, and an output of the hydraulic motor 3b. A gear 3c attached to the shaft, a main bearing 3d with external teeth that meshes with the gear 3c and is rotatably supported on the lifting side member 3a, and a main bearing 3d with external gears to the lifting side member 3a. Swinging side member 3 supported so as to be swingable
It is composed of e.

Reference numeral 4 denotes a tightening device for the casing tube 1. The tightening device 4 is attached to the swing side member 3e, and as shown in FIGS. The opening/closing tightening jack 4c opens and closes the member 4a.

6 is a ring gear having an internal gear attached to the elevating side member 3a of the swing device 3, 8 is a hydraulic pump attached to the tightening device 4, and 7 is the same hydraulic pump 8.
The gear 7 is attached to the input shaft (drive shaft) 8a of the ring gear 6, and the gear 7 meshes with the ring gear 6. When the swing device 3e rotates, the gear 7 revolves along the internal gear of the ring gear 6, causing rotation. As a result, the hydraulic pump 8 is driven.

9 is a pressure oil supply pipe connecting the hydraulic pump 8 and the opening/closing tightening jack 4c (see Fig. 4) of the tightening device 4, and pressure oil is supplied from the hydraulic pump 8 to the opening/closing tightening jack 4c (see Fig. 4). 4c.

Also, in FIG. 2 showing the hydraulic circuit of this part, 4c is a tightening jack for opening and closing the tightening device 4;
is a ring gear attached to the lifting side member 3a of the swing device 3, 7 is a gear of the hydraulic pump 8 meshed with the ring gear 6, 9a is a pressure oil supply pipe extending from the hydraulic pump 8, 11 is an electromagnetic switching valve, and 9d is a Low pressure piping extending from the electromagnetic switching valve 11 to the tank 10,
9b and 9c are high-pressure pipes extending from the electromagnetic switching valve 11 to both pressure chambers of the opening/closing tightening jack 4c; 12 is a damper connected to the high-pressure pipe 9b;
13 is a pressure switch connected to the same damper 12;
4 is a stop valve connected to the high pressure pipe 9b, 15 is a hydraulic pressure gauge, 16 is an accumulator, 17
is the stop valve, 18 is the brake valve, 19
is a limit switch, and 20 is a filter.

Next, the operation of the opening/closing drive device of the casing tube tightening device in the boring machine shown in FIGS. 1 and 2 will be specifically explained.

The hydraulic motor 3b is driven and its rotation is controlled by the gear 3.
The signal is transmitted to c→external toothed main bearing 3d→swinging side member 3e→ring gear 6→gear 7→hydraulic pump 8, drives the hydraulic pump 8, and causes the hydraulic pump 8 to generate pressure oil.

At this time, a remote control switch (not shown) moves the electromagnetic switching valve 11 from the neutral position in FIG. 2 to the left (in the direction of the tightening operation position), and
The pressure oil generated in
c in the tightening direction to attach the tightening device 4 to the casing tube 1.

Pressure oil is then supplied to the right side pressure chamber of the opening/closing tightening jack 4c, and the oil pressure in the right side pressure chamber increases more than necessary, so when the oil pressure exceeds the specified value, the pressure switch 13 is activated and the electromagnetic switch is activated. The valve 11 returns to the neutral position, the high pressure pipe 9c is shut off, and the pressure oil from the hydraulic pump 8 is transferred to the electromagnetic switching valve 1.
1 and then returned to the tank 10.

The accumulator 16 is connected to the casing tube 1
It is provided to keep the hydraulic pressure for clamping constant. Note that when the oil pressure drops below a specified value, the pressure switch 13 is activated, the electromagnetic switching valve 11 is moved to the left from the neutral position, and the pressure oil from the hydraulic pump 8 is transferred to the right pressure chamber of the opening/closing tightening jack 4c. will be supplied again.

Further, when removing the tightening device 4 from the casing tube 1, the hydraulic pump 8 is made to generate pressure oil in the same manner as described above.

At this time, the remote control switch moves the electromagnetic switching valve 11 from the neutral position to the right (in the direction of the release operating position), and the pressure oil generated in the hydraulic pump 8 is transferred from the electromagnetic switching valve 11 to the high pressure piping 9b to the opening/closing tightening. The pressure is supplied to the left side pressure chamber (release side pressure chamber) of the jack 4c, and the opening/closing tightening jack 4c is operated in the releasing direction to remove the tightening device 4 from the casing tube 1.

Further, when the opening/closing tightening jack 4c operates in the release direction and the limit switch 19 operates, the signal obtained at that time is sent to the electromagnetic switching valve 11 to return the electromagnetic switching valve 11 to the neutral position, and the high pressure pipe 9b is closed. Shut off and open/close tightening jack 4c
operation in the release direction is stopped.

(Effects of the invention) As described above, the opening/closing drive device for the casing tube tightening device in the boring machine of the present invention drives the swinging hydraulic motor provided on the lifting side member of the swinging device, and the rotation of the swinging device is controlled by the swinging hydraulic motor provided on the lifting side member of the swinging device. The information is transmitted from the swinging side member to the ring gear to the gear to the hydraulic pump, which drives the hydraulic pump to generate pressure oil. At this time, the switching valve installed in the hydraulic circuit connecting the hydraulic pump and the tightening jack for opening and closing the tightening device is switched from the neutral position to the tightening operating position, and the pressure oil generated in the hydraulic pump is transferred to the switching valve. is supplied to the tightening side pressure chamber of the opening/closing tightening jack, and the opening/closing tightening jack is operated in the tightening direction to attach the tightening device to the casing tube.
Further, when the tightening device is removed from the casing tube, the hydraulic pump generates pressure oil in the same manner as above. At this time, the switching valve is moved from the neutral position toward the release operating position, and the pressure oil generated in the hydraulic pump is supplied to the release side pressure chamber of the opening/closing tightening jack through the switching valve, and is operated in the release direction to remove the tightening device from the casing tube, so when attaching and detaching the tightening device to the casing tube as in the conventional method, the piping attachment port of the opening/closing tightening jack and the pressure oil on the non-swivel side There is no need to manually connect or disconnect the hydraulic hose piping extending from the supply source using a self-sealing coupling or the like, and there is no need to use a rotary joint. There is an effect that attachment and detachment from the tube can be carried out safely and quickly without increasing the size of the device or increasing the manufacturing cost.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing an embodiment of the opening/closing drive device of the casing tube tightening device in the boring machine of the present invention, Fig. 2 is its hydraulic circuit, and Fig. 3 is a longitudinal side view showing a conventional boring machine. 4 are plan views showing the tightening device of the boring machine. 1... Casing tube, 2... Frame,
3...Swivel device, 3a...Elevating side member of the swing device 3, 4...Tightening device, 4c...Tightening jack for opening/closing, 5...Pushing jack, 6...Ring gear,
7...Gear, 8...Hydraulic pump, 8a...Input shaft of the hydraulic pump 8, 9...Pressure oil supply pipe from the hydraulic pump 8.

Claims (1)

[Scope of utility model registration request] The elevating side member of the swivel device is attached to the frame so as to be movable up and down, the swivel side member of the swivel device is attached to the elevating side member so as to be pivotable, the tightening device for tightening the casing tube is attached to the swivel side member, and the above frame and the above In a boring machine having a pushing jack for pushing the casing tube into the ground between the lifting side member and the lifting side member, a ring gear is attached to the lifting side member of the swinging device, a hydraulic pump is attached to the tightening device, and the hydraulic pump A tightening device for a casing tube in a boring machine, characterized in that a gear mounted on an input shaft of the ring gear meshes with the ring gear, and a pressure oil supply pipe from the hydraulic pump is connected to a tightening jack for opening and closing of the tightening device. Opening/closing drive device for attached equipment.