JPH0472298A - Jack incorporating heavy weight matter unloading mechanism - Google Patents

Abstract

PURPOSE:To carry out the elevation of a machine frame, the positioning and unloading of a heavy weight matter wit the use of only one facility by integrally incorporating a jack and a lifter with each other so as to carry out the elevation of the machine frame and the positioning and unloading the heavy weight matter. CONSTITUTION:A hydraulic cylinder 22 is provided for elevating an aircraft one one end side of a body 21. A support column 24 is rotatably mounted on a deck 23. Parallel links 25, 26 are attached at the other end thereof with a hanger arm, rotatably, and are vertically moved in parallel by the hydraulic cylinder 29. Further, the hanger 30 is attached thereto with a luggage hanger 32, rotatably, and a pair of support parts 32a, 32b are provided at the lower end parts thereof, for holding a tire W.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a jack equipped with a heavy object attachment/detachment mechanism.
More specifically, the present invention relates to a jack equipped with a heavy object detachment mechanism for attaching and detaching various heavy objects such as large tires used in large bodies such as large vehicles and aircrafts.

(Prior Art) Generally, tires used for large vehicles, aircraft, etc. have a considerable weight, so hydraulic jacks and lifters are used to replace them.

As conventional hydraulic jacks and lifters of this type, for example, those shown in FIGS. 4 to 6 are known. In FIGS. 4 to 6, reference numeral 1 denotes a jack main body, and this jack main body 1 has a hydraulic cylinder 2, and the holding member 3 is raised and lowered by the cylinder 2. On the other hand, 4 is a hand-held lifter, and the lifter 4 has a top surface generally composed of a fixing member 6 equipped with casters 5 and multi-articulated link mechanisms 7a, 7b, 8a, 8b attached to both ends of the fixing member 6. A box-shaped truck frame 9 and the link mechanism 7a.

7b, 8a, and 8b, and support rollers 10.
a pair of arms 12.13 having 11;
．． 13, a hydraulic cylinder 15 interposed between the fixed member 6 and the connecting member 140 and operated by the handle 15a, and a multi-joint link mechanism 7a, 7.
Caster 1 attached to the tip of b, 8a, 8b
6.17.

The rotating parts of the multi-joint link mechanisms 7a, 7b, 8a, and 8b are attached to an arm 12.13 and a caster 16.17, and when the hydraulic cylinder 15 is operated to raise the truck frame 9, the frame 9 is installed. Guide upward approximately parallel to the surface.

For example, in order to replace a tire W of an aircraft (not shown) using the jack main body 1 and lifter 4 having such a configuration, a dolly (not shown) carrying the jack main body 1, lifter 4, and the tire W to be replaced is moved to the aircraft using a towing vehicle. tow up to. Next, the jack main body 1 and the like are lowered from the dolly, and after the holding member 3 of the jack main body 1 is aligned with the jack point of the aircraft, the hydraulic cylinder 2 is connected to a hydraulic power source to jack the aircraft. Next, the lifter 4 is moved below the tire W, and the hydraulic cylinder 15 is actuated by the handle 15a to raise the truck frame 9 and bring the support rollers 10.11 into contact with the tire W. Next, a tire fixing pad (not shown) is removed, and the tire W is removed from the axle of the aircraft while being centered. Next, a new tire W is placed on the lifter 4, and the lifter 4 is raised to align the center of the axle and the tire W. At this time, the tire W is rotated to align the bolt holes and the bolts of the axle. Next, after inserting the bolt hole of the tire W into the bolt of the axle, the lifter 4 is separated from the tire W, and while the worker holds the tire W, another worker fits the wheel nut to the bolt of the axle, thereby removing the tire. Attach W.

(Problem to be Solved by the Invention) However, in such a conventional jack main body 1 and lifter 4, the jack main body 1 and the lifter 4 were each independent, so it was necessary to raise the aircraft and remove the tires W. Not only is it necessary to prepare the jack body 1 and the lifter 4 for positioning and removal work when installing and removing the tire W, but also it is troublesome to position the center of the tire W and the axle when removing the tire W. . For this reason, there is a problem in that it takes a lot of time to attach and detach the tire W, and the workability of the attachment and detachment operation deteriorates. In particular, when positioning a tire independently of the jack body 1 or using the lid 4, due to the influence of the road surface and the extremely large weight of the tire W, the installation surface of the jack body 1 and lifter 4 must be If parallelism was not sufficient, positioning work became extremely troublesome.

Therefore, the present invention is capable of lifting and lowering the aircraft, positioning heavy objects, and attaching/detaching them using a single piece of equipment, by integrating the jack-retainer lid and lifting the aircraft, and positioning and removing heavy objects. The object of the present invention is to provide a jack equipped with a heavy object attachment/detachment mechanism that allows easy positioning of heavy objects.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, a jack equipped with a heavy object attachment/detachment mechanism according to the present invention is provided with a jack main body having a driving means capable of raising/lowering and holding a machine body equipped with a heavy object. It is a heavy object attachment/detachment mechanism that is integrally provided in the jack body, and includes a column that is rotatably provided on the jack body and extends in the vertical direction, and a column that is spaced apart in the vertical direction and has one end attached to the column and that rotates in a predetermined direction. A pair of parallel links that extend and are swingable in the vertical direction using one end as a fulcrum, a driving means for swinging the parallel links in the vertical direction, and a support with one end attached to the other end of the parallel link. an arm member that is rotatable in parallel to the rotation direction;
A support member is attached to the other end of the arm member and is capable of supporting a heavy object above the jack main body.

(Function) In the present invention, since the jack main body is integrally provided with a heavy object attachment/detachment mechanism consisting of a support member, a parallel link, etc., the jack can be used to raise and lower the aircraft, and the parallel links and support members can be used to position and remove heavy objects. A series of tasks is 1
It is carried out in one facility.

Therefore, the above-mentioned series of operations can be performed with just one minute of preparation. Furthermore, the support member can be positioned directly above the jack body regardless of the road surface or other conditions, making it easier to position heavy objects. As a result, the heavy objects can be easily attached and detached in a short time, and the workability of the attachment and detachment work is improved.

(Example) Hereinafter, the present invention will be explained based on the drawings.

1 to 3 are diagrams showing an embodiment of a jack equipped with a heavy object attachment/detachment mechanism according to the present invention.

First, the configuration will be explained. In FIG. 1.2, 21 is a jack main body, and a hydraulic cylinder 22 as a driving means is provided at one end of the main body 21. The cylinder 22 is configured to be able to be raised and lowered by hydraulic pressure, and lifts and lowers the aircraft by coming into contact with a jacking point set near tires W (heavy objects) of the aircraft (not shown). A deck 23 is attached to the other end of the jack body 21, and a support 24 is attached to the deck 23. Pillar 2
4 extends in the vertical direction in FIG. 1 and is rotatable.

Further, one end portion of a pair of parallel links 25.26 is attached to the support column 24, and the parallel links 25.26 extend parallel to the front-rear direction (left-right direction in FIG. 1) of the jack main body 21. It is swingable in the vertical direction using the pillar 24 as a fulcrum. Further, a shock absorber 28 is attached to the parallel link 25 via a swing lever 27, and the swing lever 27 is supported by the column 24 and can swing in the vertical direction. Further, one end of a hydraulic cylinder 29 as a driving means is attached to the support column 24, and the other end of the cylinder 29 is attached to a swinging lever 27, and the cylinder 29 is operated by hydraulic pressure via the swinging lever 27 and a shock absorber 28. parallel link 2
5 in the vertical direction. Also, parallel links 25.26
One end of a hanger arm 30 as an arm member is attached to the other end so as to be rotatable about its axis, that is, to rotate parallel to the rotation direction of the support column 24. , parallel links 25,26 are connected by hanger arms 30. For this reason, the parallel link 26
receives the driving force from the hydraulic cylinder 29 together with the parallel link 25 and swings in parallel in the vertical direction. In addition, a luggage hanger 32 as a support member is rotatably attached to the other end of the hanger arm 30 via a connecting pin 31, and the lower end of the hanger 32 is attached to a tire W mounted on an aircraft. A pair of support parts 32a and 32b that can be moved toward and away from each other are provided. These support parts 32a and 32b are attached to the bin 33.
It is rotatably attached to the hanger 32 by a and 33b, and rotatably supports the tire W removed from the aircraft. These pillars 24, parallel links 25, 26, swing lever 27, shock absorber 28, hydraulic cylinder 29, hanger arm, and luggage hanger 32 constitute a heavy object attachment/detachment mechanism. Furthermore, an electromagnetic switching valve 34 as shown in FIG. Alternatively, the hydraulic cylinder 29 side position (lifter operation position) is changed, and the oil pump 36a is configured to supply hydraulic oil to either one of the hydraulic cylinders 22 or 29.The oil pump 36a is connected to a gear oil motor 37. This pump 36a discharges the hydraulic oil from the oil tank 38 (hydraulic source) by the driving force of the gear oil motor 37. That is, when the switching valve 34 is switched to the neutral position 34a, the hydraulic oil discharged from the pump 36a are oil passage 39 and oil passage 40
is supplied to the oil pump 36b via the pump 3
6b to the cylinder chamber 22a of the hydraulic cylinder 22. Further, when the switching valve 34 is switched to the switching position 34b, the hydraulic oil discharged from the pump 36a is supplied to the electromagnetic switching valve 42 via the oil passage 41. This switching valve 42 is switched to the switching position 4 when a lifter raising switch (not shown) is operated.
2a, the hydraulic oil discharged from the pump 36a is supplied to the cylinder chamber 29a of the hydraulic cylinder 29 via the check valve 43 and the flow control valve 44.45, and when the lifter lowering switch (not shown) is actuated, the switch position 42b is reached. , pilot pressure is supplied to the check valve 43 to open the valve 43, and the hydraulic oil in the cylinder chamber 29a is returned to the oil tank 38 via the oil passage 46. Further, couplers 47a and 47b are provided on the deck 23, and the couplers 47a and 47b are provided on the deck 23.
7a and 47b are external drive means 4 equipped with a switching valve 48, etc.
9 can be connected and disconnected. And coupler 4
When the driving means 49 is connected to the switching valves 7a and 47b and the switching valve 48 is switched to the switching position 48a, hydraulic oil from the oil pump P is supplied to the gear oil motor 37 via the oil passage 50. Therefore, the oil pumps 36a and 36b are driven by the gear oil motor 37 and discharge hydraulic oil from the tank 38. Further, 51.52 is a hand pump, and the hydraulic oil from the oil tank 38 is supplied to the hand pump 51.52.
It is also possible to supply the hydraulic cylinder 22 from the hydraulic cylinder 22 .

Next, the effect will be explained.

To replace the tires W of an aircraft, first, the jack main body 21 is towed to the aircraft by a towing vehicle on which the replacement tires W are mounted. Next, the hydraulic cylinder 22 of the jack body 21 is placed at the jack point. Then,
An operator operates the hand pumps 51 and 52 to raise the hydraulic cylinder 22 and bring the cylinder 22 into contact with the jacking point. Next, the drive means 49 is connected to the couplers 47a and 47b, and the lever 35 is switched to the jack operation position to operate the drive means 49. Therefore, the oil motor 37 is driven and the switching valve 34 is switched to the neutral position 34a, so that the oil tank 38 is turned off and the pump 36 is turned off.
(a) Hydraulic oil is supplied to the cylinder chamber 22a of the hydraulic cylinder 22 via the oil passage 39 and oil passage 40 and the oil pump 36b to jack up the aircraft. Next, the parallel links 25, 26 and the hanger arm 30 are rotated about the pillar 24 toward the tire W, and the support parts 32a, 32b of the luggage hanger 32 are inserted into the lower end of the tire W. Next, the lever 35 is switched to the lifter operating position and the lifter raising switch is operated.

At this time, the switching valves 34.42 are at the switching positions 34b, 42a.
The oil tank 38, oil passage 39, and oil passage 4 are switched to
1. Check valve 43, flow control valve 44, and flow control valve 45
Hydraulic oil is supplied to the cylinder chamber 29a of the hydraulic cylinder 29 through the hydraulic cylinder 29. Therefore, the hydraulic cylinder 29 is connected to the parallel link 25 via the swing lever 27 and the buffer @28.
is swung upward, and the parallel links 25 and 26 are swung upward in parallel using one end as a fulcrum. Therefore, the support parts 32a and 32b of the luggage hanger 32 come into contact with the tire W.

Then, remove the tire fixing nand and parallel link 2.
After centering the tire W by operating 5.26, remove the tire W from the axle. Next, a new tire W is placed on the luggage hanger 30, the hanger 32 is raised as described above, the tire W and the axle are centered, the tire W is rotated together with the supports 32a and 32b, and the axle bolts and Align the bolt holes of the tire W. Next, move the luggage hanger 32 to the jack body 21 side, insert the bolt hole of the tire W into the bolt of the axle, and tighten the tire fixing pad.
A specified torque is applied to the NAND using a torque wrench, and the installation of the tire W is completed.

As described above, in this embodiment, since the jacking up of the aircraft, the positioning of the tire W, and the work of attaching and detaching are performed by the integrated jacking body 21 and the heavy object attaching and detaching mechanism, the above-mentioned series of operations can be carried out at one time using one piece of equipment. It can be easily done with preparation. In addition, since the luggage hanger 32 as a support member can be positioned directly above the jack main body 21, the tire W is not affected by the road surface when positioning the tire W, and the positioning work can be easily performed. be able to. As a result, the work of attaching and detaching heavy objects can be carried out easily and in a short time, and the workability of the attaching and detaching work can be improved.

(Effects) According to the present invention, since the jack main body is integrally provided with a heavy object attachment/detachment mechanism composed of a support member, a parallel link, etc., the jack can be used to raise and lower the aircraft, and the parallel link and support member can be used to lift heavy objects. A series of operations such as positioning and attachment/detachment can be performed with one piece of equipment. Therefore, the series of operations described above can be performed with one preparation. Further, the support member can be positioned directly above the jack main body 21 regardless of the road surface or other conditions, and the work of positioning heavy objects can be easily performed. As a result, heavy objects can be easily attached and detached in a short time, and the workability of the attachment and detachment work can be improved.

[Brief explanation of drawings]

FIGS. 1 to 3 are views showing an embodiment of a jack equipped with a heavy object attachment/detachment mechanism according to the present invention, FIG. 1 being a front view thereof, FIG. 2 being a top view thereof, and FIG. A circuit diagram showing the hydraulic circuit installed inside it, Figures 4 to 6 are diagrams showing a conventional lifter and jack, Figure 4 is a schematic diagram of its configuration, and Figure 5 is a diagram showing the lifter lowered. An explanatory diagram showing the state,
FIG. 6 is an explanatory diagram showing a state in which the beam lid is raised. 21... Jack body, 22... Hydraulic cylinder (driving means), 24...
..... Support column, 25.26 ..... Parallel link, 29 ..... Hydraulic cylinder (driving means), 30.
...Hanger arm (arm member), 32...
...Luggage hanger (supporting member), W...Tire (heavy object).

Claims (1)

[Claims] A heavy object attachment/detachment mechanism is integrally provided in a jack body having a driving means capable of raising and lowering and holding an aircraft body equipped with a heavy object, and includes a column rotatably provided in the jack body and extending in the vertical direction. , a pair of parallel links that are vertically spaced apart and have one end attached to a column, extend in a predetermined direction, and can swing vertically using the one end as a fulcrum, and the parallel link swings vertically. a driving means; an arm member having one end attached to the other end of the parallel link and rotatable in parallel to the rotating direction of the support; and an arm member attached to the other end of the arm member for carrying a heavy object above the jack body. A jack equipped with a heavy object attachment/detachment mechanism, characterized by comprising a support member capable of being supported.