JPH0720236Y2 - Bowling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a casing tube fastening device for a boring machine.

(Prior Art) A conventional boring machine will be described with reference to Figs. 4, 5, 6 and 7. (1) in Fig. 4, 6 is a casing tube, (2) is a frame installed on the ground, and (2a) is It is a lifting guide member provided on the same frame (2).

Further, (3) is a swivel device, and the swivel device (3) will be described in detail below. (3a) is the lifting guide member (2a).
Lifting member supported by the lifting mechanism, (3b) is a hydraulic motor mounted on the lifting member (3a), (3c) is a gear attached to the output shaft of the hydraulic motor (3b), and (3e) is a swivel. Material, (3d) is a main bearing with external teeth, the main bearing with external teeth (3d)
Is the outer ring part (3d ₁ ) and the inner ring part (3d ₂ ) as shown in FIG.
The outer ring portion (3d ₁ ) is fixed to the swivel member 3e, the inner ring portion (3d ₂ ) is fixed to the lifting member (3a), and the swivel member (3e) is attached to the outer toothed main bearing. The gear (3c) mounted on the output shaft of the hydraulic motor (3b) meshes with the outer teeth of the main toothed bearing (3d) with external teeth. is doing.

Further, (4) in FIGS. 4, 5 and 6 is an expandable and contractible ring-shaped casing tube tightening device. Next, the casing tube tightening device (4) will be specifically described. (4a) (4a)
(4a) is a casing fastening member with one center and two ends, and each casing fastening member (4a) is formed in an arc shape, and one casing fastening member (4a) is provided. It is attached to the lower surface of the lifting member (3a). In addition, (4b) is a fastening member (4
a pin for pivotally supporting the end adjacent to a), and (4c) is a fastening jack for opening and closing that is interposed between the fastening members (4a), (4a) for casing at both ends. ) Operates in the tightening direction or the releasing direction, and tightening members (4
A) expands and contracts (opens and closes), so that the casing tube (1) is tightened and the casing tube (1) is released.

Further, (5) is the frame (2) and the lifting member (3a).
And (6) a ring gear fixed to the lifting member (3a), (8) a hydraulic pump fixed to the swivel member (3e), and (7) a hydraulic pump (8). ) Is a pinion fixed to the input shaft, and the pinion (7) meshes with the ring gear (6).

Further, (11) in FIG. 7 is an electromagnetic switching valve, (9a) is a high-pressure pipe extending from the hydraulic pump (8) to the electromagnetic switching valve (11),
(9b) is a hydraulic pipe extending from the electromagnetic switching valve (11) to the left pressure chamber of the opening / closing tightening jack (4c), and (9c) is the hydraulic switching valve (11) connected to the opening / closing tightening jack ( Hydraulic piping extending to the right pressure chamber of 4c), (9d) is the same solenoid valve (1
Low-pressure pipe extending from 1) to the tank (10), (12) a damper connected to the hydraulic pipe (9b), (13) a pressure switch connected to the damper (12), and (15) a hydraulic pipe. The pressure gauge connected to (9b), (14) is a stop valve provided in the middle of the piping of the pressure gauge (15), (16) is an accumulator connected to the hydraulic piping (9b) (9c), and (17) is A stop valve provided in the middle of the piping to the accumulator (16), a relief valve (18) interposed between the hydraulic pipes (9b) and (9c), and (19) a tightening jack (4c) for opening and closing. Is a limit switch for detecting the position of the piston rod.

The operation of the boring machine shown in FIGS. 4, 5, 6 and 7 will be described below. When the casing tube (1) is pushed into the ground to excavate the earth and sand in the casing tube (1) and remove the soil, the hydraulic motor (3b) is activated, and its rotation is the gear (3c) → external toothed main The outer ring portion (3d ₁ ) of the bearing (3d) is transmitted to the swivel member (3e), and the swivel member (3e) swivels in the horizontal direction around the central axis of the casing tube (1). At this time, the pinion (7) of the hydraulic pump (8) attached to the turning member (3e) meshes with the ring gear (6) fixed to the lifting member (3a), and the pinion (7) is connected to the ring gear (6). The pinion (7) is rotated along the axis of rotation and is rotated, the rotation of the pinion (7) is transmitted to the hydraulic pump (8), the hydraulic pump (8) is driven, and pressure oil is discharged from the hydraulic pump (8). However, the spool of the solenoid operated directional control valve (11) in Fig. 6 is moved to the right by a remote control switch (not shown), and the neutral position is changed to the tightening operation position.
The pressure oil discharged from the hydraulic pump (8) is the high pressure oil passage (9a).
→ Solenoid switching valve (11) → Hydraulic piping (9b) → Supply to the left pressure chamber of the opening / closing tightening jack (4c) and the hydraulic oil in the right side pressure chamber of the opening / closing tightening jack (4c) is hydraulic. Piping (9c) → Solenoid switching valve (11) → Low pressure piping (9d) → Tank (10) is drained, the piston rod of the opening / closing tightening jack (4c) operates in the tightening direction (see arrow), The tightening member (4a) for each casing of the tightening device (4) has a reduced diameter,
The casing tube (1) is tightened so that the turning member (3e) and the casing tube (1) are tightened by the tightening device (4).
It is fixed integrally by. At this time, the turning member (3e)
Continues to turn, and the casing tube (1) also starts to turn. In this state, the pushing jack (5) operates in the contracting direction, and the lifting member (3a), the turning member (3e), the tightening device (4), and the casing tube (1) descend, and the turning operation is performed. The casing tube (1) is pushed into the ground. Further, an excavator (not shown) suspended and supported by a crane or the like moves up and down in the casing tube (1) by a crane operation, and the earth and sand in the casing tube (1) are excavated and discharged to form a pit. It is formed. As described above, the pressure oil from the hydraulic pump (8) is sent to the high pressure oil passage (9a) → electromagnetic switching valve (11) → hydraulic pipe (9b) → the left pressure chamber of the opening / closing tightening jack (4c). When the hydraulic pressure in the left pressure chamber rises above the specified value, the pressure detection signal from the pressure switch (13) that detects the pressure is sent to the solenoid switching valve (11) to switch the solenoid switching. The spool of the valve (11) is switched from the tightening operation position to the neutral position, the high pressure pipe (9a) and the hydraulic pipe (9b) are cut off, and the pressure oil discharged from the hydraulic pump (8) is high pressure pipe. (9a) → Solenoid selector valve (11) → Low pressure pipe (9d) → Return to tank (10). When the hydraulic pressure in the left pressure chamber of the opening / closing tightening jack (4c) drops below a specified value, a pressure detection signal from the pressure switch (13) that detects that pressure is sent to the solenoid switching valve (11). , The spool of the electromagnetic switching valve (11) is switched from the neutral position to the tightening operation position, and the pressure oil discharged from the hydraulic pump (8) is supplied again to the left pressure chamber of the opening / closing tightening jack (4c). It The accumulator (16) is provided to keep the hydraulic pressure to the opening / closing tightening jack (4c) constant. When the tightening device (4) is removed from the casing tube (1), the remote control switch is operated. At this time, the spool of the solenoid operated directional control valve (11) moves to the left from the neutral position in FIG. 6 and is switched from the neutral position to the release operation position, and the pressure oil from the hydraulic pump (8) is transferred to the high pressure pipe (9a). ) → Solenoid switching valve (11) → Hydraulic piping (9c) → Supply to the right side pressure chamber of the opening / closing tightening jack (4c) and the hydraulic oil in the left side pressure chamber of the opening / closing tightening jack (4c). Hydraulic piping (9b) → electromagnetic switching valve (11) → low pressure piping (9d) → tank (10) is drained, the piston rod of the opening / closing tightening jack (4c) moves in the releasing direction (see arrow), The position detection limit switch (19) operates, and the detection signal obtained at that time is sent to the electromagnetic switching valve (11), and the spool of the electromagnetic switching valve (11) is switched from the release operation position to the neutral position, and the high pressure pipe (9a) and the hydraulic pipe (9b) are cut off, and the hydraulic pump (8) Pressure oil is a high-pressure pipe (9a) → low-pressure pipe (9
d) → Oil is drained to the tank (10), and the operation of the opening / closing tightening jack (4c) in the releasing direction stops.

(Problems to be solved by the device) In the conventional boring machine shown in FIGS. 4, 5, 6, and 7,
The turning member (3e) is turned by the turning hydraulic motor (3b) on the lifting member (3e), and the pinion (7) on the turning member (3e) side meshing with the ring gear (6) on the lifting member (3a) side is moved. Revolve along the ring gear (6) and let it rotate,
The rotation (rotation) of the pinion (7) is transmitted to the hydraulic pump (8) on the turning member (3e) side to drive the hydraulic pump (8) to open and close the pressure oil from the hydraulic pump (8). Send it to the tightening jack (4c), operate the piston rod of the opening and closing tightening jack (4c) in the tightening direction, and reduce the diameter of each arcuate tightening member (4a) of the tightening device (4). , The casing tube (1) is tightened, and each arcuate tightening member (4a) of the tightening device (4) until the pressure oil is sufficiently supplied to the opening / closing tightening jack (4c). Slides on the outer peripheral surface of the casing tube (1), and the casing tube (1) is damaged early.

When the digging depth becomes deeper, a large rotational torque is required for the hydraulic pump (8), the rotational speed of the hydraulic pump (8) decreases, and sufficient pressure oil is supplied to the opening / closing tightening jack (4c). However, the time required for tightening the casing tube (1) becomes long, the work efficiency decreases, and the tightening force becomes insufficient.

In addition, the hydraulic pump (8),
Since the electromagnetic switching valve (11), piping, wiring, etc. are arranged, there is a problem in that they are easily damaged and cannot operate.

The present invention is proposed in view of the above problems, and an object of the present invention is to prevent the arc-shaped tightening member of the tightening device from sliding relative to the casing tube and to prevent early damage to the casing tube. Can be prevented. In addition, the time required for tightening the casing tube can be shortened, the work efficiency can be improved, and the situation of insufficient tightening force does not occur.
Another point is to provide a boring machine that does not damage equipment such as hydraulic pumps, piping, and wiring.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention has an elevating member attached to a frame so as to be able to ascend and descend, a pushing jack of the elevating member, and a pivotable attachment to the elevating member. A boring machine having a swiveling member and a ring-shaped casing tube tightening device attached to the swiveling member so as to be expandable and contractable,
The ring-shaped casing tightening member of the casing tube tightening device, which is expandable and contractible, is connected at its open both ends and a ring-shaped member disposed therebelow by a pair of connecting rods inclined in a V shape to form the ring-shaped member. A hydraulic cylinder for expanding and contracting the casing tightening member is interposed between the member and the elevating member.

(Operation) The boring machine of the present invention is configured as described above, and sends pressure oil from a hydraulic source of a system different from that for turning to a hydraulic cylinder for clamping, and operates this in the contracting direction to form a ring shape. The lower ends of the connecting rods inclined in a V shape are pushed up through the members, and the two casing fastening members of the casing tube fastening device are moved toward each other so that the casing tubes are closed. tighten. Also, the hydraulic cylinder for clamping is operated in the extension direction to release the casing tube.

(Embodiment) Next, an opening / closing drive device for a casing tube tightening device of a boring machine according to the present invention will be described with reference to an embodiment shown in FIGS. 1, 2, and 3. (1) in FIG. 1 is a casing tube. .

Further, (3) is a swivel device, and the swivel device (3) will be specifically described below. (3a) is an elevating member supported by an elevating guide member (2b) of a frame (2) so as to be able to ascend and descend,
(3b) is a hydraulic motor mounted on the lifting member (3a),
(3c) is a gear attached to the output shaft of the hydraulic motor (3b),
(3e) is a swivel member, (3d) is a main bearing with external teeth, and the main bearing with external teeth (3d) has an outer ring part (3d ₁ ) and an inner ring part (3d ₂ ) as shown in FIG. The outer ring part (3d ₁ ) is fixed to the swivel member (3e), the inner ring part (3d ₂ ) is fixed to the lift member (3a), and swiveled by the outer toothed main bearing (3d). The member (3e) is supported by the elevating member (3a) so as to be able to swing in the horizontal direction, and the gear (3c) attached to the output shaft of the hydraulic motor (3b) is attached to the outer ring portion of the outer toothed main bearing (3d) ( 3d ₁ ) meshes with the external teeth.

Further, (4) is a casing tube tightening device, and this casing tube tightening device (4) will be described in detail below. (4a) is for a central fastening member for casing and two casings at both ends. The fastening members (4a) for each casing are formed in an arc shape, and the central portion 1
The individual casing tightening member (4a) is the lifting member (3a).
Is fixed to the lower surface of the casing, and adjacent ends of one casing fastening member (4a) and two casing fastening members (4a) at both ends are pivotally supported by pins (4b) to expand and contract ( It can be opened and closed).

Further, (24c) is a sliding plate, and the same sliding plate (24c) is at both ends 2 above.
The individual casing fastening members (4a) are held so as not to move vertically. The upper ends of the connecting rods (25) and (25) are rotatably attached to the two casing fastening members (4a) through the pins (24d) and spherical bearings (24e). The lower end of (25) is rotatably attached via a pin (26c) and a spherical bearing (26d) to a flange (26b) attached to an inner ring (26a) of a bearing (26) coaxial with the swivel device (3). As a result, each connecting rod (25) is held in a C-shaped inclined state in a side view. A flange (26f) is attached to the outer ring (26e) of the bearing (26), and the lower ends of the piston rods of the three clamping cylinders (27) are pivotally supported by the flange (26f) via the pin (27a). The upper end of each clamp cylinder (27) is pivotally supported by the lifting member (3a) via a pin (27b). Further, each of the clamp cylinders (27) and a hydraulic pressure source (a hydraulic pressure source of a system different from that for turning) (28) are connected by a hydraulic pipe (28b) having an oil passage switching valve (28a).

Next, the operation of the boring machine shown in FIGS. 1 and 2 will be specifically described. By switching the oil passage switching valve (28a), pressure oil from a hydraulic source (28) of a system different from that for turning can be supplied to the hydraulic pipe (28).
b) to each clamp hydraulic cylinder (27),
The hydraulic cylinders (27) for each clamp are operated in the expansion / contraction direction. If these clamping hydraulic cylinders (27) are operated in the contracting direction, the flange (26f), the outer ring (26a) of the bearing (26), the inner ring (26a), the flange (26b), the spherical bearing (26d), and the pin. (26c) is pushed upward and the angle of the V-shape of each connecting rod (25) increases, while the spherical bearing (24e) and pin (24d) at the upper end of each connecting rod (25) and the casing. The casing fastening device (4) moves in a direction in which the two fastening members (4a) for casings on both ends relatively move, and the casing tube (1) is fastened. In this case, since the above-mentioned action is performed while the angle of the V-shaped inclination of each connecting rod (25) increases, the force of the clamping hydraulic cylinder (27) is boosted, which is strong and reliable. A strong tightening force can be obtained. On the contrary, if each hydraulic cylinder for clamping (27) is operated in the extending direction, the two casing fastening members (4a) of the casing tube fastening device (4) are relatively separated from each other. Direction, the casing tube (1) is unfastened. In this way, since the movement of each clamp hydraulic cylinder (27) in the expansion and contraction direction is changed to the movement of the connecting rod (5) which turns together with the turning device (3), regardless of whether or not the turning device (3) turns. The casing tube tightening device (4) can be tightened and released.

(Effect of the Invention) As described above, the boring machine of the present invention sends pressure oil from a hydraulic power source of a system different from that for turning to a hydraulic cylinder for clamping and operates it in the contracting direction to pass it through a ring-shaped member. Then, the lower end of each connecting rod inclined in a C-shape is pushed up, and the two casing fastening members of the casing tube fastening device are moved toward each other in a relatively approaching direction to fasten the casing tube. Also, the hydraulic cylinder for clamping is operated in the extension direction to release the casing tube. Since the swivel device drive system of the tightening device and the tightening member opening / closing drive system of the tightening device are separate systems, tightening The operating hydraulic jack can be operated when desired (when the tightening device is turning or when it is stopped), and the casing member can be damaged early without sliding the tightening member of the tightening device against the casing tube. Can be prevented.

In addition, the time required for tightening the casing tube can be shortened, the work efficiency can be improved, and the situation of insufficient tightening force does not occur.

In addition, there is no need to provide equipment such as hydraulic pumps, piping, and wiring in the swivel part where the earth and sand often fall, and there is an effect that these equipment such as hydraulic pumps, piping, and wiring are not damaged.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a boring machine according to the present invention, a cross-sectional plan view taken along the line II-II of FIG. 1 in FIG. 1, and FIG. Fig. 4 is a side view showing a conventional boring machine, Fig. 5 is a cross-sectional plan view taken along the line V-V in Fig. 4, and Fig. 6 is an enlarged vertical section of a part of a turning device. A side view and FIG. 7 are hydraulic circuit diagrams thereof. (1) …… Casing tube, (2a) …… Elevation guide member, (3) …… Swivel device, (3a) …… Elevation member, (3
e) ...... Rotating member, (4) ...... Casing tube tightening device, (4a) ...... Casing tightening member, (25) ...... Connecting rod, (26) ...... Ring member, (27) ... … Clamp hydraulic cylinder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shown 63-108487 (JP, U) Shown flat 1-150687 (JP, U) Shown flat 2-23089 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An elevating member attached to a frame so as to be able to ascend and descend, a pushing jack of the elevating member, a swiveling member pivotably attached to the elevating member, and a ring-shaped casing attached to the swiveling member so as to be expandable and contractible. In a boring machine having a tube tightening device, the open end portions of the expandable / contractible ring-shaped casing tightening member of the casing tube tightening device and the ring-shaped member disposed below the open-end part are inclined in a V shape. A boring machine, characterized in that a hydraulic cylinder for connecting and disconnecting the casing-shaped clamping member is interposed between the ring-shaped member and the elevating and lowering member by connecting with a pair of connecting rods.