JPH0650471Y2 - Hydraulically operated lifting device with foldable ground arm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a fluid pressure actuated lifting device such as a pneumatic hoist having a foldable grounding arm that supports a fluid pressure supply device such as a gas cylinder. Provided is one that enhances the stability at the time of lifting and lowering operation of and can easily attach and detach the support frame of the fluid pressure supply device to the ground base.

<Prior Art> The basic structure of the fluid-pressure-operated lifting device having a foldable grounding arm, which is the subject of the present invention, has three units on the base body 1 of the grounding base D as shown in FIG. 1 or FIG. Above arm support 2
Are fixedly projecting radially in a plan view, and an engaging portion 5 for holding the posture for use is formed on the lower portion of each arm support portion 4 and an engaging portion 6 for holding the posture for folding is formed on the upper portion thereof. Then, the grounding use posture A in which each grounding arm 2 is engaged with the use posture maintaining engagement portion 5 on each arm support portion 4, and the folding posture maintaining engagement portion 6 are used.
It is possible to switch to the flip-up folding posture B that is engaged with, and the fluid pressure cylinder 3 for raising and lowering drive supported on the stand body 1 can be driven up and down by supplying and discharging the pressure fluid from the fluid pressure supply device 7, thereby supplying the fluid pressure. The support frame 8 of the device 7 is detachably supported on the grounding base D and is constructed.

In the conventional technique of this type, as shown in FIG. 4, the fluid pressure actuating type lifting device is a pneumatic actuating type, and the upward and sideward cylindrical support portions 4 are provided in four directions on the outer surface of the base body 1. And the cylindrical hole of the upward cylindrical arm support portion 4 as the folding posture maintaining engagement portion 6, and the cylindrical hole of the lateral side cylindrical arm support portion 4 as the use posture maintaining engagement portion 5. The four grounding arms 2 are engaged with the cylindrical holes 5 of the lateral arm support portion 4 of the base body 1, the air cylinder 3 is assembled to the base body 1, and the support frame 8 is attached to the upward cylindrical arm support portion. 4 is a rectangular rod-shaped guide portion 51 that can be fitted into the folding posture cylinder hole 6, and the guide portion 51.
And a belt-shaped container holding portion 52 provided on the upper part of the above, the support frame 8 is fitted and fixed in the folding posture cylinder hole 6, and the bottom surface of the gas cylinder 7 is mounted on a predetermined sideways cylindrical arm support portion 4. There is a structure in which the gas cylinder 7 is supported along the air cylinder 3 in the space above the grounding arm 2 held in the grounding use posture A by holding the cylinder shoulder portion tightly with the container holding portion 52. .

<Problems to be Solved by the Invention> However, in the above-mentioned conventional technique, since the gas cylinder 7 is arranged at a high position above the arm support portion 4, the center of gravity of the pneumatically operated lifting device integrated with the gas cylinder becomes high. Will end up.

For this reason, if the pneumatic cylinder 3 is advanced too high, the entire lifting device may become unstable and may fall over. Therefore, the lifting height must be limited to a low value.

Further, since the lower portion of the rod-shaped guide portion 51 is only fitted and inserted into the flip-up engagement cylinder hole 6 at one place, especially when the gas cylinder 7 is going to fall forward in the direction away from the air cylinder 3, the engagement cylinder The hole 6 may be pushed down and deformed due to concentration of force.

On the contrary, if the engaging cylindrical hole 6 is to be strongly formed, the arm supporting portion 4 must be made large in size, which leads to an increase in cost.

Further, when the gas cylinder 7 is supported by the support frame 8, the gas cylinder 7 is in an unstable state in which only one point is placed on the bottom side of the bottom of the gas cylinder 7 on the arm support portion 4. Therefore, the holding portion 52 is strongly tightened with bolts. Since it is necessary to prevent it from falling sideways, when actually removing the cylinder, a tool for loosening the bolt is required, which complicates the work.

It is a technical object of the present invention to improve the stability of the lifting device during the lifting operation, eliminate the damage due to the support of the fluid pressure supply device, and allow the support frame to be easily attached to and detached from the ground base. .

<Means for Solving the Problems> Means for solving the above problems will be described below with reference to the drawings corresponding to the embodiments.

That is, according to the present invention, in the fluid pressure lifting device having the grounding arm having the above-mentioned foldable structure, the supporting frame 8 can be arranged in the inner space C between the arm supporting portions 4 of the grounding base D, The frame 8 includes a vertical frame portion 10, a mounting portion 11 that is fixedly extended from the lower portion of the vertical frame portion 10 in a forward direction, and a holding portion 12 provided on the upper portion of the vertical frame portion 10. A pair of left and right downward hooks 14 from the middle height of 10
Is provided so as to project rearward and leftward and rightward, and the hook 14 is configured to be engageable with and disengageable from the folding posture maintaining engagement portion 6 of the arm support portion 4 of the base body 1, and the support frame 8 is provided to the arm support portions 4 and 4. In the state where the hooks 14 are mounted and arranged in the narrow-angle inner spaces C, the hooks 14 are engaged with and supported by the engaging portions 6 from above, and the abutment surface 15 on the lower back surface of the support frame 8 is received by the base body 1. It is characterized in that it contacts the surface 16.

The fluid pressure cylinder 3 supported on the base body 1 is, for example,
Refers to gas cylinders such as air and hydraulic cylinders such as water and oil.

The fluid pressure supply device 7 supported by the support frame 8 refers to a gas cylinder in the case of an air cylinder, a combination of a liquid storage tank and a pressure pump in the case of a hydraulic cylinder, and the like.

<Operation> When the fluid pressure supply instrument 7 is supported by the support frame 8, the pair of left and right hooks 14 of the support frame 8 engage with the two folding posture maintaining engagement parts 6 of the arm support part 4, and the support frame 8 Lower contact surface 15
Is abutted on the receiving surface 16 of the base body 1, and the supporting frame 8 is stably suspended and fixed to the grounding base D in a state where the placing portion 11 is lifted from the grounding surface.

In this case, since the hook 14 is provided at the intermediate height portion of the vertical frame portion 10, the mounting portion 11 of the support frame 8 is located below the arm supporting portion 4, so that the fluid pressure supply device mounted on the mounting portion 11 is placed. The bottom surface of 7 is considerably lower than the grounding arm 2, and the center of gravity of the fluid pressure supply instrument 7 is lowered.

Further, since the pair of left and right hooks 14 engages with the engaging portions 6 and 6, even if the fluid pressure supply instrument 7 tries to fall forward, this forward falling force is distributed to the two engaging portions 6 and works. Since it is not concentrated in one place unlike the prior art, the possibility that the arm support portion 4 is deformed is small.

<Effects of the Invention> (1) Since the grounding stand can be stabilized even when the center of gravity of the support of the fluid pressure supply device is lowered with respect to the grounding stand and the fluid pressure cylinder is extended for a long time, the feet fluctuate as in the prior art. The problem of having to limit the delivery height of the fluid pressure cylinder is eliminated.

(2) Even when the fluid pressure cylinder is about to tilt forward, this forward tilting force is concentrated at one location in the prior art, whereas it is dispersed at two locations in the present invention.
The risk that the arm support portion is deformed is reduced, and the arm support portion can be implemented inexpensively without increasing the size of the arm support portion.

(3) Since the support frame is arranged in the space between the arm support parts at the included angle, when the fluid pressure supply device is supported by the support frame, the device is guided by the arm support parts on both sides and there is no danger of falling sideways. Since there is no need to tighten the holding part firmly, when engaging and disengaging the support frame, it suffices to engage and disengage the hook with the engaging part for holding the folded position. It is possible to greatly simplify the engagement / disengagement operation of the support frame with respect to the grounding base and to simplify the support structure of the support frame without using a tool unlike the technique.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a supporting frame of a gas cylinder, FIG. 2 is a perspective view of a state in which the supporting frame is supported by an arm supporting portion, and FIG. 3 is a perspective view of a pneumatically operated lifting device supporting the supporting frame. hand,
The pneumatically operated lifting device comprises a grounding table D, a lifting driving air cylinder 3, and a support frame 8.

The grounding base D is composed of a base body 1, four arm supporting portions 4 radially and fixedly projectingly provided on the base body 1 in a plan view, and grounding arms 2 respectively provided on the arm supporting portions 4. .

The arm support portion 4 is formed from a plate-shaped body having a U-shaped cross section, and a laterally outward use posture holding engagement portion 5 is cut out at a lower portion of the arm support portion 4 and an upper portion of the arm support portion 4 is directed upward. The U-shaped folding posture holding engagement 6 is concavely contacted.

The engaging pin 17 is laterally outwardly projected from the grounding arm 2 so that the engaging pin 17 can be engaged with the engaging portions 5 and 6 provided on the arm supporting portion 4, and each arm supporting portion 4 is grounded. The arm 2 is rotatably supported so as to be switchable between an upward flip-up folding posture and a lateral outward facing ground use posture A.

A rotary caster with a stopper is attached to the tip of the grounding arm 2.
18 is attached so that the entire lifting device can be moved in all directions.

A tube receiving portion 19 is formed on the base body 1, a telescopic air cylinder 3 having a cylindrical shape is fitted and fixed to the tube receiving portion 19, and a load receiving portion 20 is formed on an upper portion of the air cylinder 3.
It is configured to be able to load a platform etc.

The support frame 8 has a rectangular tubular mounting portion 11 oriented horizontally.
And a vertically rectangular cylindrical vertical frame portion 10 vertically welded to the upper surface of the mounting portion 11, and a circular strip-shaped cylinder holding portion 12 detachably attached to the upper portion of the vertical frame portion 10. It

Through holes 21 are formed in a plurality of steps on the left and right side surfaces of the vertical frame portion 10, the cylinder holding portion 12 is fastened to the through hole 21 at an appropriate height position with a fixture 22, and the body portion of the gas cylinder 7 is held by the holding portion 12. It is sandwiched in the form of an external fitting, the tip end portion 23 of the holding portion 12 is faced, and the fixture 24 closes them.

Further, a pair of left and right forked hooks 14 are downwardly welded to an intermediate height portion of the back surface 10a of the vertical frame portion 10 so that the two adjacent arm supporting portions 4 and 4 are engaged with each other to hold the folding posture.・ 6
The bifurcated hook 14 is configured to be detachable.

The function of the lifting device will be described below.

Telescope type air cylinder 3 in the cylinder receiving part 19 of the base body 1.
While inserting and holding, the bottom surface is placed on the placing portion 11, the cylinder portion is tightened by the cylinder holding portion 12, the gas cylinder 7 is fixed to the support frame 8, and then the hook 14 is engaged for holding the folded posture. The support frame 8 integrated with the gas cylinder 7 by being engaged with the portions 6 and 6 is supported and fixed to the grounding base D.

Then, the gas cylinder 7 is connected to the ventilation hole in the lower part of the air cylinder 3 by an air hose via a hand operation lever (not shown).

In this case, the contact surface 15 on the back side of the mounting portion 11 of the support frame 8
Is the receiving surface 16 provided on the lower outer surface of the tube receiving portion 19 of the base body 1.
Since the gas cylinder 7 is in contact with the hook 14, the gas cylinder 7 is stably positioned and fixed in the space C between the arm supporting portions 4 of the grounding base D while being lifted from the grounding surface. It

Therefore, the placing portion 11 of the support frame 8 is arranged lower than the grounding arm 2, and the center of gravity of the gas cylinder 7 placed on the placing portion 11 and by extension, the whole lifting device integrated therewith is lowered, so that the telescope type air Even when the cylinder 3 is extended for a long time, the lifting device is stably supported on the ground surface without rattling.

Further, since the bifurcated hook 14 is supported by the engaging portions 6 at two points, the center of gravity of the gas cylinder 7 is mediated by the hook 14 even if the gas cylinder 7 tends to fall over the grounding base D. Since the engaging portions 6 are distributed to the left and right engaging portions 6, there is no possibility that the engaging portion 6 will be damaged due to the deformation force concentrated on one point as in the prior art.

In the above embodiment, the pneumatically operated lifting device is described, but the present invention may be applied to, for example, a hydraulically operated lifting device.

In this case, the fluid pressure supply device 7 is a combination of a tubular oil tank and a hydraulic pump integrally set with the oil tank.

Further, the present invention is characterized in that the folding holding engaging portion 6 of the arm supporting portion is used for engaging and disengaging the support frame 8. Therefore, for example, the vertical folding holding engaging cylindrical hole shown in FIG. The hook 14 may be engaged with 6 and thus the present invention is applicable to prior art lifting devices.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 is a perspective view of a supporting frame of a gas cylinder, FIG. 2 is an overhead perspective view of a state where the supporting frame is supported by an arm supporting portion, and FIG. Is a perspective view of a pneumatically operated lifting device supporting a support frame, and FIG. 4 is a view corresponding to FIG. 3 showing a conventional technique. DESCRIPTION OF SYMBOLS 1 ... Stand body, 2 ... Arm support part, 3 ... Fluid pressure cylinder for raising / lowering drive, 4 ... Arm support part, 5 ... Use position holding engagement part, 6 ...
Engagement portion for maintaining folding posture, 7 ... Fluid pressure supply device, 8 ...
Support frame, 10 ... Vertical frame part, 11 ... Mounting part, 12 ... Holding part, 14 ... Hook, 15 ... Contact surface, 16 ... Receiving surface, A ... Grounding use posture, C
… Inside space, D… Grounding stand.

Claims (1)

[Scope of utility model registration request] 1. A ground body D of a grounding base D is provided with three or more arm supporting portions 2 which are fixed and protruded radially in a plan view, and the arm supporting portions 4 are outwardly engaged with the lower portions of the arm supporting portions 4 for use posture holding. 5, and upwardly folding posture holding engaging portions 6 are formed respectively,
Each ground support arm 4 is provided so as to be switchable between a grounding use posture A in which each grounding arm 2 is engaged with a use posture maintaining engagement portion 5 and a flip-up folding posture engaged with a folding posture maintaining engagement portion 6. The hydraulic cylinder 3 for raising and lowering drive supported on the base body 1 can be moved up and down by supplying and discharging the pressure fluid from the fluid pressure supply instrument 7, and the support frame 8 of the fluid pressure supply instrument 7 can be attached to and detached from the ground table D. In a fluid pressure actuated lifting device having a foldable grounding arm configured to be supported, a supporting frame 8 can be arranged in an inner space C between the arm supporting portions 4 of the grounding base D, and the supporting frame 8 is The vertical frame portion 10, a mounting portion 11 that is fixedly extended from the lower portion of the vertical frame portion 10 in a forward direction, and a holding portion 12 provided on the upper portion of the vertical frame portion 10, and the middle portion of the vertical frame portion 10. A pair of left and right hooks 14 from the height
Is provided so as to project rearward and leftward and rightward, and the hook 14 is configured to be engageable with and disengageable from the folding posture maintaining engagement portion 6 of the arm support portion 4 of the base body 1, and the support frame 8 is provided to the arm support portions 4 and 4. In the state where the hooks 14 are mounted and arranged in the space C between the corners, the hooks 14 are engaged with and supported by the engaging portions 6 from above, and the abutment surface 15 on the lower back surface of the support frame 8 is received by the base body 1. Hydraulically actuated lifting device with foldable grounding arm characterized by abutting against surface 16