JPH063872Y2 - Device for attaching / detaching hydraulic coupling for band cylinder of casing driver - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] The present invention relates to a fully swiveling casing driver for press-fitting and withdrawing large-diameter steel pipe piles or steel pipes used for construction and civil engineering foundation works.
The present invention relates to an attachment / detachment device for a hydraulic joint that constitutes a hydraulic circuit that supplies and discharges hydraulic fluid to and from a hydraulic cylinder for opening and closing a band of a hydraulic band device that fixes a casing to a rotating body.

[0002]

2. Description of the Related Art A casing driver includes a thruster table rotatably mounted on a base frame horizontally held by a jack by a thrust cylinder, a rotary body rotatably mounted on the thruster table by a hydraulic motor, and By having a casing gripping band attached to the rotating body and a hydraulic band cylinder for opening and closing the band, the male and female joints respectively attached to the rotating body side and the thruster table side can be detachably connected. , Supplying hydraulic oil to the band cylinder,
Configure a hydraulic circuit to discharge. Then, when press-fitting a steel pipe with a casing driver, the joint is connected, hydraulic oil is supplied to the band cylinder through the joint, and the casing is chucked with the band by operating in the direction of closing the band and chucking. When the above is completed, the joint is removed, the thrust cylinder is operated in the thruster table descending direction, and at the same time, the rotating body is rotated together with the casing by the hydraulic motor. As a result, the casing is given a pushing force by the weight of the casing driver and the weight attached to the casing driver, and is pressed into the ground by one stroke of the thrust cylinder. Next, the joint is connected again, hydraulic oil is supplied to the band cylinder through the joint, and the band is operated in the opening direction to release the restraint by the band of the casing, raise the thruster table, and move the band as described above. The operation of chucking, pushing down, and rotating the casing is repeated.

On the other hand, when pulling out the casing, the thruster table is at the lowest position.
The joint is connected, hydraulic oil is supplied to the band cylinder through the joint, the band cylinder is actuated in the closing direction to chuck the casing with the band, and after the chucking is completed, the joint is removed, and the thrust cylinder is actuated to thruster. At the same time as the table is lifted together with the casing, the casing is rotated together with the rotating body by a hydraulic motor as required, and the thruster table is raised by one stroke of the thrust cylinder. Then, the joint is connected and the band cylinder is connected through the joint. Is supplied with hydraulic oil to operate the band in the opening direction to release the restraint of the casing band.
Lower the thruster table with the thrust cylinder,
The operation of chucking and pushing up the casing with the band as described above is repeated.

Since such a full-swivel type casing driver can press-fit while centering the casing by rotating the casing, the casing driver can be vertically inserted as compared with the swing type. Although excellent, the band cylinder is mounted on the rotating body side. Therefore, in order to open and close the band by the band cylinder, one stroke of the thrust cylinder is required in order to supply and discharge hydraulic oil to and from the band cylinder. Each time the casing is pressed in or pulled out, the joint must be attached and detached. Conventionally, this joint was manually attached and detached, but since the hydraulic pressure remains in the hydraulic circuit on the rotating body side, the connection cannot be made manually unless the joint is connected after depressurizing. Detachment took time and was a cause of reduced work efficiency.

In order to solve such a problem, the present applicant has already developed and proposed the device shown in FIG. 11 (Japanese Patent Laid-Open No. 61-270418). This device includes a joint 4 connected to a band cylinder (not shown) on the rotating body 1 side via return pipes 2 and 2 (this joint 4 is placed above and below the two pipes 2 and 2). Although two are provided, but the lower joint does not appear in the drawing), a hydraulic cylinder 7 for attaching and detaching the thruster table 5 side joint 6 (two joints 6 are also arranged above and below) is provided. , Thruster table 5 side joint 6
The following structure is provided for retracting the device to a position where it does not contact the rotating device. That is, the moving body 10 is mounted so as to be movable along the guide 9 provided in the tangential direction of the rotating body 1,
A bracket 8 is rotatably attached to the movable body 10 about a pin 11, and the joint 6 and the hydraulic cylinder 7 are mounted on the bracket 8. Further, when the piston rod 13 of the hydraulic cylinder 12 having one end connected to the guide 9 is connected to the moving body 10 and the hydraulic cylinder 12 is extended, the moving body 10 is shown by a two-dot chain line A to the end of the guide 9. As described above, and the bracket 8 is inclined with respect to the guide 9 by the force of the tension spring 14, the thruster table 5 side joint 6 is retracted. Further, when the joint 4 is stopped at the position shown in the drawing, the hydraulic cylinder 1
When 2 is contracted, the moving body 10 moves from the position indicated by the chain double-dashed line to the position indicated by the solid line.
5 is locked in the concave portion 16 of the rotating body 1 side bracket, the bracket 8 rotates around the pin 11 as the moving body 10 moves, and the joint 6 has the radius of the rotating body 1 as shown by the solid line. Facing the rotary body side joint 4 and facing the hydraulic cylinder 7
Is extended, the joint 6 advances and is connected to the joint 4.

[0006]

However, in this conventional structure, in order to surely align the male and female joints 4 and 6, the tip portion 15 of the bracket 8 is engaged with the recess 16 provided on the rotation side. A hydraulic cylinder 12 for laterally rotating the bracket 8 while rotating it, a lateral movement guide mechanism, etc. are required, resulting in a large-scale device and a complicated structure.
There was a problem that the installation space had to be large.

Further, since the operator sets the stop position of the rotary joint, the target position is sometimes mistakenly recognized, and the joint is forcibly pushed in, which may damage the joint.

In view of the above problems, the present invention is for a band cylinder of a casing driver, which can realize a small space with a simple mechanism, can set the stop position of the rotary joint to a suitable position, and can perform a reliable position adjustment. An object is to provide a device for attaching and detaching a hydraulic joint.

[0009]

In order to solve the above-mentioned problems, the present invention provides a slide guide attached to the thruster table, a slide bracket which moves along the slide guide, and a slide bracket for moving the slide bracket. An actuator, a non-rotation side joint attached to the slide bracket, a holder attached to the rotating body, and a rotation side joint attached to the holder so as to face the connection port of the non-rotation side joint on a rotation locus. And a positioning guide for a joint provided with the slide bracket and the holder and each having a guide surface for positioning, and a rotary position detection switch for the rotary body is attached to the thruster table, and the rotary body is mounted on the rotary body. , The actuator for activating the rotational position detection switch on the thruster table and the rotor. Mounting joints Re respectively is characterized in that mounted in a position to operate the rotation position detecting switch in a position opposite.

[0010]

Since the present invention has the above-mentioned structure, when the joint is connected, the rotary body is rotated, and when the rotary body is rotated to the stop position, the rotary body side actuating body operates the rotary position detecting switch on the thruster table. When the slide bracket is operated, the rotating body is stopped and the rotating side and non-rotating side joints face each other, and in this state, the actuator is operated to move the slide brackets in the direction in which the joints approach each other. And the action of the guide surface of the alignment guide provided on the holder causes the cores of the joints to be aligned, so that the joints are connected to each other.

[0011]

【Example】

An embodiment of the present invention will be described below with reference to the drawings. 1 is a front view showing a coupling device according to the present invention, FIG. 2 is a plan view, and FIG. 3 is an enlarged view of a main part of FIG. In FIGS. 1 and 2, 5 is a hydraulic thrust cylinder (not shown) along the guide posts 20 provided at the four corners of the base frame 3.
It is a substantially ring-shaped thruster table which is mounted so as to be able to move up and down by means of a ring-shaped rotating body 1 which is mounted on the thruster table 5 so as to be rotated by a hydraulic motor (not shown). The rotating body 1 has a hydraulic band device that holds and releases a casing (not shown) by a band cylinder 22 and a band 23, which are hydraulic cylinders.

Reference numeral 24 denotes a pair of left and right slide guides vertically provided on the thruster table 5, and 25 is mounted between the left and right slide guides 24, 24 so as to be movable along the slide guides 24, 24. This is a slide bracket, and as shown in FIG. 3, the slide bracket 25 is attached to the slide guides 24, 24 so as to be allowed to move left and right by a gap indicated by g.

Reference numeral 26 is a slide bracket 2 mounted between the slide bracket 25 and the thruster table 5.
5 is a hydraulic cylinder for movement, and its connecting portion with the slide bracket 25 is connected by a pin 27 so as to be rotatable relative to each other within a range constrained by the slide guide 24.

Reference numeral 28 denotes a pair of male joints vertically mounted on the slide bracket 25, which are respectively connected to a hydraulic source or an oil tank via hydraulic hoses 33, 33.

On the other hand, a holder 29 attached to the rotating body 1
In addition, the female joints 30, 30 connected to the hydraulic band cylinder 22 via the conduits 2, 2 are attached to the slide bracket 25 on the locus of the rotation of the rotating body 1 of the joints 30, 30. The joints 28, 28 are attached so that the connection ports face each other.

The slide bracket 25 is provided with a pair of left and right tapered guide rods 31 which are sharpened on the distal end side, while the holder 29 is provided with the guide rods 3
1 is provided with a tapered guide hole 32 corresponding to 1.
The guide rod 3 constitutes the alignment guides for 8 and 30.
When 1 is guided and inserted into the tapered surface of the guide hole 32, the cores of the male and female joints 28 and 30 are aligned and joined. Therefore, the structure is such that the tip of the guide rod 31 reaches the guide hole 32 before the tip of the male joint 28 reaches the lower end of the female joint 30.

Reference numeral 34 is a limit switch attached to the thruster table 5, and reference numeral 35 is a striker attached to the rotating body 1 as an operating body for operating the limit switch 34. As shown in FIG. The striker 35 and the limit switch 34 are positioned with respect to the joints 30 and 28 so that the joints 28 and 30 face each other in a state in which the joints 28 and 30 are operated in contact with the contact opening / closing movable piece 34a.

FIG. 4 shows an example of a circuit for stopping the rotating body 1 by actuating the limit switch 34, 36 is a hydraulic power source installed in a power unit (not shown), and 37 is a hydraulic motor for rotating the rotating body 1. , 38 is the hydraulic motor 3
7 is an electromagnetically operated control valve, and 39 and 40 are pilot switches of the control valve 38. 41 is a switch for attaching / detaching joints, R1 to R4 are relays, and r1 to r4
Are contacts of the relays R1 to R4. 42 is a reset switch. Relays R1 and R2 a-contacts r1 and r2
Are connected to the pilot circuits 44 and 45 of the solenoids 38a and 38b of the control valve 38 via b contacts r4 and r4 of the relay R4, respectively. Also, the relay r
Reference numeral 4 is connected to the power source through the a-contact 34a of the limit switch 34, the a-contact r3 of the relay R3, and the reset switch 42.

In this structure, when the joint attaching / detaching work switch 41 of FIG. 4 is not operated (open), the relay R3 is not energized, so that the contact r3 of the relay R3 is kept open and the limit switch 34 is opened. Even if the contact 34a is actuated by the striker 35 and the contact 34a is closed, the relay R4 is not energized. Therefore, since the b-contact r4 is still closed, the control valve 38 is switched by operating the pilot switches 39 and 40 by the operator.
The rotating body 1 is rotated in the forward or reverse direction by driving the hydraulic motor 37, and the rotating body 1 rotates as long as the pilot switch 39 or 40 is closed.

On the other hand, when the joint attachment / detachment work switch 41 is closed, as shown in FIG. 5, the relay R3 is energized and self-held by the contact r3 connected in series to the relay R3,
Further, the contact r3 connected in series to the limit switch contact 34a is closed, the limit switch 34 is operated by the striker 35, and the contact R34a is closed by closing the contact 34a, so that the relay R4 is inserted into the pilot circuits 44 and 45. The contact point r4 opens. Therefore, by operating the pilot switch 39 or 40, the hydraulic motor 37 that was rotating is stopped, and the rotating body 1 is stopped.

In this state, as shown in FIG.
Since the joints 30 and 28 face each other, when the hydraulic cylinder 26 is extended, the slide bracket 25 rises along the left and right slide guides 24, 24, and first the guide rod 3
1, 31 are inserted into the guide holes 32, 32, and the joint 28,
Alignment between 30 is performed, and the hydraulic cylinder 26
The joints 28 and 30 are joined by extending the joint.

When the reset switch 42 is operated to open it, as shown in FIG. 5, the self-holding of the relay R3 is released and the relays R3 and R4 are deenergized to be in the normal working state, that is, the limit switch 34. Regardless of whether it is on or off, the hydraulic motor 37 is returned to the state of being rotated by operating the switches 39 and 40.

In the above embodiment, the joint alignment guide is provided with a pair of guide rods 31 and guide holes 32.
However, these may be provided one by one in the central portion, or a block having a guide surface may be provided instead of the tapered hole. Further, the structure that allows the joints 28 and 30 to move in the lateral direction may be provided on the rotary body 1 side or on both the rotary body 1 side and the thruster table 5. In addition, in the embodiment, the male joint 28 and the guide rod 31 are on the lower side, and the female joint 30 and the guide hole 32 are on the upper side, which is advantageous in terms of preventing the infiltration of earth and sand. Not limited. A hydraulic cylinder 26 is used as means for moving the slide bracket 25 up and down.
It is also possible to use other actuators instead of.

Further, in the above embodiment, the signal of the limit switch 34 is ignored or utilized depending on the circuit configuration. However, by displacing the limit switch 34 such as remote operation by an operator, a position operable by the striker 35 is provided. Alternatively, it may be retracted to an inoperable position.

In the above configuration, the limit switch 3
4 and 1 set of striker 35, but striker 3
Since 5 has a certain width in the rotation direction, when the limit switch 34 is actuated, the relative rotational position of the rotating body 1 differs between forward rotation and reverse rotation. Therefore, the striker 35 or forward rotation and reverse rotation are different. It is necessary to change the mounting position of the limit switch 34.

In order to solve such a problem, FIG. 6 shows the striker and the limit switch 35A and 35B on the rotary body 1 and the thruster table 5, respectively.
And 34A and 34B, two limit switches 35A and 34B are provided at intervals in the circumferential direction.
Is positioned so that the joints 28 and 30 attached to the thruster table 5 and the rotary body 1, respectively, face each other in a state in which they are both actuated by the corresponding strikers 35A and 35B. In this case, as shown in FIG. 7, the movable pieces 34 of the limit switches 34A and 34B are
L1 between a and 34a, and strikers 35A and 35B
The distance L2 between them is different (in this example, L1 <L2 is set, but L1> L2 may be set), so that the rotating body 1 always stops at a fixed position regardless of the rotating direction. To do so.

FIG. 8 is a circuit diagram of this embodiment. The difference from FIG. 4 is that the limit switch contact is 2 of the contact 34a.
Individual (each contact 34a1 of the limit switches 34A, 34B)
And 34a2) are connected in series.

FIG. 9 shows the limit switch 34A when the joint attachment / detachment work switch 41 in FIG. 8 is closed and the pilot switch 39 is closed to rotate the rotating body 1 in the forward direction as shown by the arrow a in FIG. , 34B and the operation of the relay R1, the hydraulic motor 37, etc.
No. 4 is urged when both the limit switches 34A and 34B operate, that is, when the striker 35A activates the limit switch 34A and at the same time when the striker 35B activates the limit switch 34B,
The contact r4 is opened, the control valve 38 is returned to the neutral position, and the hydraulic motor 37 is stopped. Reset switch 42
When is operated to open, the relay R3 is deenergized, and the rotating body 1 can be rotated by operating the pilot switch 39 or 40.

FIG. 10 illustrates the operation when the rotating body 1 is rotated in the reverse direction, and the limit switches 34A and 3 are also provided at this time.
The hydraulic motor 37 stops when both 4B are activated.

Although the limit switch is used as the rotational position detecting switch in the above-described embodiment, it is also possible to use another switch used for position detection, such as a proximity switch, instead of the limit switch.

[0031]

According to the present invention, the bracket to which the non-rotating side joint is attached is slid to the rotating side joint side by the actuator so as to be joined, and at the time of this proximity operation, the core is guided by the positioning guide of the joints. Since the alignment can be performed, the space can be reduced with a simple mechanism and the position can be surely adjusted. Also, since the rotation position detection switch is provided, the joint centering is automatically performed, which enables labor saving.Also, the stop position of the rotating body with respect to the thruster table can always be kept constant, and this can be done manually. As in the case, there is no risk of damage to the joint due to misidentification of the position.

In the second aspect, the rotating body can be always stopped at a fixed position regardless of the rotating direction of the rotating body. Therefore, when attaching or detaching the joint, the rotating direction of the rotating body can be arbitrarily selected. The effect that work can be performed efficiently can be produced.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a coupling device according to the present invention.

FIG. 2 is a plan view showing an embodiment of a coupling device according to the present invention.

FIG. 3 is an enlarged view of a main part of the drawing.

FIG. 4 is a circuit diagram of the embodiment.

FIG. 5 is a time chart explaining the operation of the embodiment.

FIG. 6 is a front view showing another embodiment of the joint attaching / detaching device provided with the rotary position switch in the present invention.

FIG. 7 is an explanatory diagram of a gap between a rotary position detection switch and an operating body of the other embodiment.

FIG. 8 is a circuit diagram of the other embodiment.

FIG. 9 is a time chart explaining the operation of the other embodiment. .

FIG. 10 is a time chart explaining the operation of the other embodiment. .

FIG. 11 is a plan view of a conventional coupling device.

[Explanation of symbols]

 1 Rotating Body 3 Base Frame 5 Thruster Table 20 Guide Post 22 Band Cylinder 24 Slide Guide 25 Slide Bracket 26 Hydraulic Cylinder 28, 30 Joint 29 Holder 31 Guide Rod 32 Guide Hole 34 Limit Switch 34A, B Limit Switch 34a Limit Switch Contact 35 Striker 35A, B striker 37 Rotating body driving hydraulic motor 39 Forward rotation switch 40 Reverse rotation switch 41 Joint attachment / detachment work switch 42 Reset switch R1 to R4 relay r1 to r4 relay contact

Claims (2)

[Scope of utility model registration request] 1. A thruster table is attached to a guide post of a base frame by a thrust cylinder so that the thruster table can be moved up and down, a ring-shaped rotating body rotated by a hydraulic motor is attached to the thruster table, and a casing holding band is attached to the rotating body. A hydraulic pressure for supplying and discharging hydraulic oil to and from the band cylinder by attaching a band cylinder for opening and closing the band, and detachably connecting male and female joints respectively attached to the rotating body side and the thruster table side. In a device for attaching / detaching a hydraulic coupling for a band cylinder of a casing driver forming a circuit, a slide guide attached to the thruster table, a slide bracket moving along the slide guide, an actuator for moving the slide bracket, and the slide bracket. Mounted on A rotation-side joint, a holder attached to the rotating body, a rotation-side joint mounted so as to be opposed to the connection port of the non-rotating-side joint on a rotating locus to said holder,
The slide bracket and the holder are respectively provided with a positioning guide of a joint having a guide surface for positioning provided on the holder, and the thruster table,
A rotary position detection switch for the rotary body is attached, an operating body for operating the rotary position detection switch is mounted on the rotary body, and the rotary position detection switch is mounted at a position where the thruster table and the joints mounted on the rotary body face each other. A mounting / demounting device for a hydraulic coupling for a band cylinder of a casing driver, which is mounted at a position to be operated. 2. The operating body and the rotary position detecting switch according to claim 1, wherein two rotary bodies and a rotary position detecting switch are provided on the rotary body and a thruster table at intervals in the circumferential direction, and the rotary body detecting switch corresponds to each operating body. In the state where both of them are operated, the positions are set so that the joints attached to the thruster table and the rotating body face each other, and the distance between the both operating bodies and the distance between the both rotary position detecting switches are made different. An attaching / detaching device for a hydraulic coupling for a band cylinder of a casing driver.