JP2000233726A - Oil feeder to hydraulic jack unit for outrigger device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a risk of collective damage to a hose. SOLUTION: In an outrigger device 6 equipped with a horizontal outrigger unit consisting of an outer casing 1, a center casing 2, an inner casing, an center casing extension cylinder 4, and an inner casing extension cylinder 5, and a vertical jack unit 8 locked to a tip part of the inner casing 3, the tip part of a piston rod 9 of the center casing extension cylinder 4 is connected to the outer casing 1, and the rod side end of a cylinder tube 10 to the center casing, the head side end of a cylinder tube 11 of the inner casing extension cylinder 5 to the rod side end, the tip part of a piston rod 12 to the inner casing 3, respectively. Likewise, a first joint 21 is installed in the tip part of the piston rod 9 of the center casing cylinder 4, and a second joint 22 in a base end of the center casing 3, a third joint 23 in a jack cylinder, respectively. Successively, it is provided with a hose 24 whose one end is connected to the first joint 21 and the other end is guided to the tip side of the inner casing 3 and then connected to the second joint 22 after being turned over, and also provided with a hose 25 whose one end is connected to the second joint 22 and the other end to the third joint 23 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply device for a jack device in an outrigger device such as a crane mounted on a vehicle such as a truck.

[0002]

2. Description of the Related Art FIG.
As shown in the figure, an outer cylinder 51 connected and fixed to a body such as a crane, a middle cylinder 52 slidably fitted in the outer cylinder 51, an inner cylinder 53 slidably fitted in the middle cylinder 52, A horizontal outrigger device 54 comprising a hydraulic cylinder 57 for extending and retracting the cylinder 52 with respect to the outer cylinder 51 and a hydraulic cylinder 58 for extending and contracting the inner cylinder 53 with respect to the middle cylinder 52, There is one provided with a jack device 56 which expands and contracts in a vertical direction by a cylinder 55.

In this outrigger device 50, a joint 59 is provided at the rod-side end of a cylinder tube of a hydraulic cylinder 58 and a joint 60 is provided at a head-side end as an oil supply device for supplying hydraulic oil to a jack device 56. A pipe 61 is provided for connecting the two joints 59 and 60, and a joint 62 is fixed to the rod-side end of the cylinder tube of the hydraulic cylinder 57 to connect the joint 62 and the joint 60. 63 is provided, one end is connected to the joint 62, a hose 64 is connected to the hydraulic supply port 65 at the base end of the outer cylinder 51, and is connected to the joint 59 at one end. Then, a hose 67 is provided which once reaches the base end and is turned upside down and connected to the supply / discharge port 66 on the upper portion of the hydraulic cylinder 55 from the distal end of the inner cylinder 53.

However, in this oil feeder, when the inner cylinder 53 expands and contracts with respect to the middle cylinder 52, the turned-back portion of the hose 64 comes off from the base end of the inner cylinder 53. At the time of contraction, the hose 64 is irregularly bent or damaged by the proximal end of the inner cylinder 53, and the life is short. Therefore, as shown in FIG. 6, the outer cylinder 71, the middle cylinder 72,
In an outrigger device 70 including a lateral outrigger device 74 composed of an inner cylinder 73 and a jack device 76 fixed to the distal end of the inner cylinder 73 and expanded and contracted in a vertical direction by a hydraulic cylinder 75, a middle portion is provided at the distal end of the outer cylinder 71. A fitting portion 78 for forming a space 77 is provided above the upper side surface of the cylinder 72, and a base end of a relay rod 80 provided with a hose relay tool 79 at a distal end is attached to the middle cylinder 7.
2 and a joint 8 at the distal end of the outer cylinder 71.
1 is connected, a hose 82 is connected to one end of the joint 81, reaches the base end side of the outer cylinder 71 through the space 77, is turned upside down, and connects the other end to the relay device 79. There has been proposed an oil supply device to a jack device 76 provided with a hose 83 which is fixed at one end, once reaches the base end side of the inner cylinder 73 and is turned upside down to connect the other end to the hydraulic jack 75 (actually fair). 3-18472).

However, also in this oil feeder, the two hoses 82 and 83 are both turned upside down, and the horizontal outrigger device 74 moves with bending when it expands and contracts. The risk of damage to 83 was still high, and the life was still not satisfactory.

[0006]

SUMMARY OF THE INVENTION The present invention solves such a problem in an outrigger device. In a lubricating device for a jack device, only one hose that is turned upside down and folded is provided. It is an object of the present invention to provide a refueling device for a jack device of an outrigger device, which can reduce a risk of troublesome hose damage and reduce costs for hose replacement and maintenance and inspection.

[0007]

According to the present invention, a lubricating device for a jack device of an outrigger device according to the present invention includes an outer cylinder connected and fixed to a body of a crane or the like, a middle cylinder slidably fitted in the outer cylinder, and a middle cylinder. A lateral outrigger device comprising an inner cylinder slidably fitted into the cylinder, a middle cylinder telescopic cylinder for expanding and contracting the middle cylinder with respect to the outer cylinder, and an inner cylinder telescopic cylinder for expanding and contracting the inner cylinder with respect to the middle cylinder; A jack device fixed to the distal end of the cylinder and having a jack device that expands and contracts in the vertical direction by a jack cylinder, the distal end of the piston rod of the middle cylinder telescopic cylinder is connected to the outer cylinder, and the cylinder tube of the middle cylinder telescopic cylinder is The rod end is connected to the middle cylinder, the head end of the cylinder tube of the inner cylinder telescopic cylinder is connected to the rod end of the cylinder tube of the middle cylinder telescopic cylinder, Connected to the inner cylinder tip portion of Nroddo, first the distal end of the piston rod of the middle cylinder telescopic cylinder
A joint is provided, a second joint is provided at the base end of the inner cylinder, a third joint is provided at the jack cylinder, one end is connected to the first joint, and the other end is once guided to the distal end side of the inner cylinder and turned upside down. In order to solve the above-mentioned problem, a hose connected to the second joint is provided, one end of which is connected to the second joint, and the other end is provided with a conduit which is guided to the distal end of the inner cylinder and connected to the third joint. I have.

At the start of work, the outrigger device first extends the middle cylinder telescopic cylinder and the inner cylinder telescopic cylinder to project the middle cylinder and the inner cylinder in the storage position toward the distal end, and then extends the jack cylinder. Extend the jack device downward to ground and ensure stability. At the end of the operation, the jack cylinder is shortened and the jack device is stored, and then the inner cylinder telescopic cylinder and the middle cylinder telescopic cylinder are shortened and the inner cylinder and the middle cylinder are stored in the outer cylinder.

When the lateral outrigger device expands and contracts in this manner, the pipe connected between the second joint and the third joint is not deformed, but is turned upside down and moves with bending in the first case. Only the hose connected between the joint and the second joint. Therefore, the overall risk of damage to the hose in the outrigger device is reduced, and the cost of hose replacement and maintenance and inspection can be reduced.

When a hose guide member extending along the middle cylinder telescopic cylinder and having a base end connected to the first joint is provided, when the lateral outrigger device expands and contracts, the hose becomes a middle cylinder,
Contact with the inner cylinder is prevented, further reducing the risk of hose damage.

[0011]

FIG. 1 is a longitudinal sectional view showing a stored state of an outrigger device according to an embodiment of the present invention, and FIG.
1 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a longitudinal sectional view showing a state in which a middle cylinder of the outrigger device is extended, and FIG. is there.

This outrigger device comprises an outer cylinder 1 connected and fixed to the body of a crane, a middle cylinder 2 slidably fitted in the outer cylinder 1, and an inner cylinder 3 slidably fitted in the middle cylinder 2. A lateral outrigger device 6 comprising a middle cylinder telescopic cylinder 4 for expanding and contracting the middle cylinder 2 with respect to the outer cylinder 1 and an inner cylinder telescopic cylinder 5 for expanding and contracting the inner cylinder 3 with respect to the middle cylinder 2; And a jack device 8 fixed to the section and expanded and contracted in the vertical direction by a jack cylinder 7.

The middle cylinder telescopic cylinder 4 has a piston rod 9
Is connected to the outer cylinder 1, and the rod-side end of the cylinder tube 10 is connected to the middle cylinder 2. The expansion and contraction of the middle cylinder telescopic cylinder 4 causes the middle cylinder 2 to expand and contract with respect to the outer cylinder 1. Let it. The inner cylinder telescopic cylinder 5 is a cylinder tube 1
1 is connected to the rod-side end of the cylinder tube 9 of the middle cylinder telescopic cylinder 4, and the piston rod 12
Is connected to the inner cylinder 3, and the inner cylinder 3 expands and contracts with respect to the middle cylinder 2 by expansion and contraction of the inner cylinder telescopic cylinder 5.

The jack device 8 includes a jack outer cylinder 14, a jack inner cylinder 15 slidably fitted into the jack outer cylinder 14, and a ground plate 16 attached to a lower end of the jack inner cylinder 15. The jack cylinder 7 has a cylinder tube 17 having a head-side end connected to a jack outer cylinder 14 and a distal end of a piston rod 18 connected to a jack inner cylinder 15.
The jack inner cylinder 15 expands and contracts with respect to the jack outer cylinder 14 by expansion and contraction of the jack cylinder 7.

A first joint 21 is provided at the distal end of the piston rod 9 of the middle cylinder telescopic cylinder 4, a second joint 22 is provided at the base end of the inner cylinder 3, and a cylinder of the jack cylinder 7. A third joint 23 is provided at the head-side end of the tube 17. The first joint 21 has a pipe (such as a pipe or a hose) for supplying and discharging hydraulic oil from a hydraulic switching valve (not shown) of the crane to the middle cylinder telescopic cylinder 4, the inner cylinder telescopic cylinder 5, and the jack cylinder 7. A pipe (not shown) for supplying / discharging hydraulic oil to / from the middle cylinder telescopic cylinder 4 and the inner cylinder telescopic cylinder 5 via the first joint 21 is connected to the pipe (not shown). It is connected.

Between the first joint 21 and the second joint 22, one end is connected to the first joint 21, and the other end is once guided to the distal end side of the inner cylinder 3, is turned upside down, and is turned back. Is provided with a hose 24 for supplying and discharging hydraulic oil to and from the jack cylinder 7 connected to the hydraulic cylinder. Further, between the second joint 22 and the third joint 23, a jack cylinder 7 having one end connected to the second joint 22 and the other end guided to the distal end of the inner cylinder 3 and connected to the third joint 23. Hose 2 for supplying and discharging hydraulic oil
5 are provided. In this outrigger device, when the jack device 8 is extended and the ground plate 16 is grounded, the third joint 23 provided on the jack cylinder 7 may move slightly. However, since there is basically no moving part between the second joint 22 and the third joint 23 due to the expansion and contraction of the lateral outrigger device 6, the jack device 8 itself may be constituted by the jack cylinder 7 or the like. If there is no risk of the three joints 23 moving, other pipes such as fixed pipes can be used instead of the hose 25.

A base end of a hose guide member 26 is pivotally connected to the first joint 21. Hose guide member 26
Is a member having substantially the same length as the cylinder tube 10 of the middle cylinder telescopic cylinder 4 extending along the middle cylinder telescopic cylinder 4, and a plurality of clamp members 27 for clamping the hose 24 on the lower surface thereof at appropriate intervals. It is arranged. An upper guide piece 28 having a distal end inclined downward so that the hose guide member 26 is smoothly guided into the inner cylinder 3 even if the hose guide member 26 hits the upper end of the inner cylinder 3 when the inner cylinder 3 contracts. ,
In addition, a wedge-shaped side guide piece 29 whose leading end is narrowed so as to be smoothly guided into the inner cylinder 3 even when the hose guide member 26 is brought into contact with the left and right sides of the base end of the inner cylinder 3 is provided. It is designed to get inside.

The hose guide member 26 prevents the hose 24 from floating and coming into contact with the middle cylinder 2 and the inner cylinder 3 when the middle cylinder 2 and the inner cylinder 3 expand and contract. A bracket 30 protrudes from the head end of the cylinder tube 10 of the middle cylinder telescopic cylinder 4 toward the tip of the inner cylinder 3. The bracket 30 is a U-shaped member having an arc-shaped tip, and the bracket 30 separates the left and right hoses 24 for supplying and discharging the hydraulic oil so as not to interfere with each other at the inverted portion.

At the start of the operation, the middle cylinder telescopic cylinder 4 is extended by operating the hydraulic switching valve of the crane, and the middle cylinder 2 in the retracted position as shown in FIG. 1 is extended toward the distal end side as shown in FIG. Further, the inner cylinder telescopic cylinder 5 is extended to extend the inner cylinder 3 toward the distal end side as shown in FIG.
To extend the jack device 8 downward, and
Ground to ensure stability.

At the end of the operation, the jack cylinder 7 is shortened and the jack device 8 is stored, and then the inner cylinder telescopic cylinder 5 and the middle cylinder telescopic cylinder 4 are shortened to reduce the inner cylinder 3 and the middle cylinder 2.
Is stored in the outer cylinder 1. When the lateral outrigger device 6 expands and contracts, the hose 25 connected between the second joint 22 and the third joint 23 is not deformed, is turned upside down, and moves with bending only when the first joint 21 moves. Only the hose 24 connected between the second joints 22 is provided. Therefore, the overall risk of damage to the hose in the outrigger device is reduced, and the cost of hose replacement and maintenance and inspection can be reduced.

[0021]

As described above, in the lubricating device for the jack device of the outrigger device of the present invention, since only one hose is turned upside down, the overall risk of damage to the hose is reduced, The cost of hose replacement and maintenance and inspection can be reduced. When a hose guide member extending along the middle cylinder telescopic cylinder and having a base end connected to the first joint is provided, when the lateral outrigger device expands and contracts, the hose is prevented from contacting the middle cylinder and the inner cylinder, The risk of hose damage is further reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a stored state of an outrigger device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a longitudinal sectional view showing a state where a middle cylinder of the outrigger device is extended.

FIG. 4 is a longitudinal sectional view showing a state where a middle cylinder and an inner cylinder of the outrigger device are extended.

FIG. 5 is an explanatory diagram showing a configuration of a conventional outrigger device.

FIG. 6 is an explanatory diagram showing a configuration of a conventional outrigger device.

[Explanation of symbols]

 Reference Signs List 1 outer cylinder 2 middle cylinder 3 inner cylinder 4 middle cylinder telescopic cylinder 5 inner cylinder telescopic cylinder 6 lateral outrigger device 7 jack cylinder 8 jack device 9 piston rod 10 cylinder tube 11 cylinder tube 12 piston rod 21 first joint 22 second joint 23 Third joint 24 Hose 25 Hose 26 Hose guide member 27 Clamp member 30 Bracket

Claims (2)

[Claims] An outer cylinder connected and fixed to a body such as a crane, a middle cylinder slidably fitted in the outer cylinder, an inner cylinder slidably fitted in the middle cylinder, and a middle cylinder as an outer cylinder. A lateral outrigger device comprising a middle cylinder telescopic cylinder which expands and contracts, and an inner cylinder telescopic cylinder which expands and contracts the inner cylinder with respect to the middle cylinder, and a jack device which is fixed to the tip of the inner cylinder and which expands and contracts vertically by a jack cylinder. In the outrigger device provided with, the distal end of the piston rod of the middle cylinder telescopic cylinder is connected to the outer cylinder, the rod-side end of the cylinder tube of the middle cylinder telescopic cylinder is connected to the middle cylinder, and the cylinder tube of the inner cylinder telescopic cylinder The head end of the middle cylinder telescopic cylinder is connected to the rod side end of the cylinder tube of the middle cylinder telescopic cylinder, and the tip end of the piston rod of the inner cylinder telescopic cylinder is connected to the inner cylinder. A first joint is provided at the distal end, a second joint is provided at the base end of the inner cylinder, a third joint is provided at the jack cylinder, and one end is connected to the first joint and the other end is once guided to the distal end side of the inner cylinder. A hose connected to the second joint is provided, one end of which is connected to the second joint, and the other end of which is guided to the distal end side of the inner cylinder.
A refueling device for a jack device of an outrigger device, wherein a pipe line connected to a joint is provided. 2. The refueling of an outrigger device to a jack device according to claim 1, further comprising a hose guide member extending along the middle cylinder telescopic cylinder and having a base end connected to the first joint. apparatus.