JPH0648687A - Jack device - Google Patents

Abstract

PURPOSE:To well contract a barrel part by surely retracting a barrel part to the inside while restricting swelling to the outside of the barrel intermediate part, at the time of contraction. CONSTITUTION:In a jack device in which a hollow unit 1 having a barrel part 2, formed of flexible material into a truncated cone cylindrical shape, is provided to enable the barrel part 2 to extend and contract in a vertical direction by filling the inside of this hollow unit 1 with gas or by discharging it, band-shaped reinforcing units 7A, 7B for retracting the barrel part 2 to the inside by restricting its swelling to the outside, at the time of contraction, are provided over almost the enting periphery in the peripheral direction, in the vertical direction overhalf the barrel part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack device for vertically moving a heavy load using gas.

[0002]

2. Description of the Related Art For example, there is a jack device provided with a hollow body 31 as shown in FIG. This hollow body 3
Reference numeral 1 is provided with a body portion 32 formed of a flexible material in the shape of a truncated cone, and upper and lower lid members 33 and 34 closing the upper and lower openings of the body portion 32. The upper lid member 33 is moved up and down by injecting or discharging gas and expanding and contracting the body portion 32, whereby the heavy object placed on the upper lid member 33 is moved up and down. On the lower surface of the upper lid member 33 and the upper surface of the lower lid member 34, annular joint portions 35 and 36 are provided so as to project, and these joint portions 35 and 36 are internally fitted and fixed to the upper and lower opening edge portions of the body portion, respectively. When the gas in the hollow body 31 is discharged from the state in which the upper lid member 33 is at the highest position shown by the phantom line in FIG. 5, the body portion 32 becomes the lower end portion of the joint portion 35 of the upper lid member 33 due to the weight of the upper lid member 33 and the weight. Then, the upper lid member 33 descends as it is drawn inward and contracts.

[0003]

In the above-mentioned conventional apparatus, when the vertical dimension of the body portion 32 is lengthened to increase the rising height of the upper lid member 33, or the body portion 32 is repeatedly expanded and contracted. When the body 32 contracts,
As shown by the solid line in FIG. 5, the body portion 32 may bulge outward, resulting in poor contraction. When the body portion 32 bulges outside, the body portion 32 is locally bent and the body portion 32 buckles. ,
The bent portion becomes wrinkled, resulting in poor appearance and fatigue at the portion.

Therefore, an object of the present invention is to prevent the middle part of the body part from bulging outward during contraction, and to reliably retract the body part so that the body part is well contracted.

[0005]

The technical means taken by the present invention to achieve the above object comprises a hollow body 1 having a body 2 formed of a flexible material in the shape of a truncated cone. In a jack device in which a body part (2) can be expanded and contracted in the vertical direction by injecting or discharging gas into the hollow body (1), a vertical expansion part of the body part (2) is expanded to the outside of the body part (2) when contracted. The point is that strip-shaped reinforcing bodies 7A and 7B for restricting the protrusion and pulling the body portion 2 inward are provided over substantially the entire circumference in the circumferential direction.

[0006]

Operation: By injecting or discharging gas into the hollow body 1 of the jack device, the body portion 2 of the hollow body 1 expands and contracts and the hollow body 1
The heavy object placed on the top is moved up and down. And the hollow body 1
When the gas is discharged from the state in which the gas is filled therein, the body 2 has the shape of a truncated cone, so that the body 2 is bent and contracted from the upper end due to the weight of a heavy object or the like. At this time, since the strip-shaped reinforcing bodies 7A and 7B are provided over the substantially entire circumference of the trunk portion 2 in the vertical midway portion, a part of the trunk portion 2 bulges outward. The body portion 2 where the reinforcing bodies 7A and 7B are provided does not bend, and the body portion 2 bends so as to be drawn inward from the lower ends of the reinforcing bodies 7A and 7B. Good shrinkage of 2.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 3, reference numeral 1 is a hollow body as an elevating means of the jack device, which is provided with a truncated cone-shaped barrel portion 2 and upper and lower lid members 3 and 4 for closing the upper and lower openings of the barrel portion 2. Then, by injecting or exhausting a gas such as air or exhaust gas into the hollow body 1, the body portion 2 is expanded or contracted in the vertical direction, whereby the upper lid member 3 is moved up and down, and the heavy load on the upper lid member 3 is removed. It is designed to move up and down.

The body 2 is made of a relatively flexible material such as rubber or vinyl chloride. For example, a fan-shaped sheet material is rolled into a cylinder and both ends are polymerized and bonded together. It is formed in the shape of a conical cylinder. The upper and lower lid members 3 and 4 are formed of a plate material made of metal, synthetic resin or the like, and annular joints 5 and 6 are formed on the lower surface of the upper lid member 3 and the upper surface of the lower lid member 4, respectively.
Are integrally formed. Then, the joint portion 5 of the upper lid member 3
Is fitted and fixed to the upper opening edge of the body 2, and the joint 6 of the lower lid member 4 is fitted and fixed to the lower opening edge of the body 2. Reinforcing tapes 9 and 10 extending from the joints 5 and 6 to the body portion 2 are adhered to the upper and lower end portions inside the hollow body 1 along the entire inner circumference, and the upper and lower opening edges of the body portion 2 are joined to each other. It prevents peeling from 5 and 6.

A pair of upper and lower reinforcing bodies 7 are arranged on the outer peripheral surface of the body portion 2 at a midway in the vertical direction with a space therebetween.
A and 7B are provided. These reinforcing bodies 7A and 7B are formed in a strip plate shape with a material having a relatively high rigidity such as metal, synthetic resin, or hard rubber, and are fixed along the entire circumference of the body portion 2. Further, the distance between the upper and lower reinforcing bodies 7A and 7B, the distance between the upper reinforcing body 7A and the joint portion 5 of the upper lid member 3, and the distance between the lower reinforcing body 7B and the joint portion 6 of the lower lid member 4 are
It is preferable that the reinforcing members 7A and 7B have substantially the same interval and have a width greater than or equal to the vertical width of the reinforcing members 7A and 7B.

In the above structure, when the gas in the hollow body 1 is discharged from the state in which the upper lid member 3 is at the highest position as shown by phantom lines in FIGS. 3 and 1, as shown by the solid line in FIG.
Due to the weight of the upper lid member 3 and the weight placed on the upper lid member 3, the body portion 2 between the joint portion 5 of the upper lid member 3 and the upper reinforcing body 7A is pulled inward and bent. Mu. next,
As shown in FIG. 2, the body portion 2 where the upper reinforcement body 7A is fixed does not bend, and the body portion 2 between the upper and lower reinforcement bodies 7A and 7B is pulled inward from the lower end of the reinforcement body 7A. Bend. Next, the body portion 2 between the lower reinforcing body 7B and the joint portion 6 of the lower lid member 4 is pulled inward from the lower end of the reinforcing body 7B and bends. In this way, the body 2 is sequentially folded into a corrugated cross section and contracts regularly. At this time, if the distance between the upper and lower reinforcements 7A and 7B and the distance between the upper and lower reinforcements 7A and 7B and the respective joints 5 and 6 are equal to or less than the vertical width of the reinforcements 7A and 7B, the upper and lower reinforcements. 7A and 7B and the joint portions 5 and 6 are displaced in the vertical direction, and the height of the uppermost lid member 3 at the lowest position is increased. Further, when gas is injected into the hollow body 1 from the above state, the body portion 2 expands by the operation reverse to the above operation.

The reinforcing member may be provided on the inner peripheral surface side of the body portion, and one to three reinforcing bodies may be provided depending on the vertical length of the body portion.
You may provide more than one. Further, the reinforcing body formed in a ring shape may be externally or internally fitted and fixed to the body portion. Further, the position at which the reinforcing body is provided can be variously set, and for example, as shown in FIGS. 4A to 4F, by increasing the distance between the uppermost reinforcing body 7A and the joint portion 5 of the upper lid member 3, The body 2 between the reinforcing body 7A and the joint 5 is set to be bent twice, and the interval between the reinforcing bodies 7A, 7B, 7C is set to be substantially the same as the vertical width of the reinforcing bodies 7A, 7B, 7C. You may set it.

[0012]

According to the present invention, when the gas filled in the hollow body 1 is discharged and the body portion 2 is contracted, the body portions 2A and 7B are provided at the middle portion of the body portion 2 in the vertical direction. Two
It is restricted that a part of the
Is reliably drawn inward, so that the body portion 2 contracts well. Moreover, when the hollow body 1 is filled with gas, the reinforcing bodies 7A and 7B can restrict the body portion 2 from expanding outward in the radial direction.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an operating state of a hollow body of a jack device.

FIG. 2 is a side sectional view of the same.

FIG. 3 is a partial cross-sectional side view showing the entire hollow body.

FIG. 4 is a side sectional view showing a working state of a hollow body of a modified example.

FIG. 5 is a side sectional view showing a conventional hollow body.

[Explanation of symbols]

 1 Hollow Body 2 Body 7A Reinforcement 7B Reinforcement

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[Procedure amendment]

[Submission date] June 11, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of the invention Jack device

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack device for vertically moving a heavy load using gas.

[0002]

2. Description of the Related Art For example, as a jack device, a hollow body having a body formed of a flexible material is provided, and the body can be vertically expanded and contracted by injecting or discharging gas into the hollow body. (See Jitsuko Sho 55-143296).

[0003]

However, in the conventional jack device described above, since the body portion is formed in a simple cylindrical shape, there are cases where the body portion cannot be properly retracted in the radial inward direction when contracted. For this reason, the baggage may be touched sideways at the time of contraction, or the trunk may be bent at various parts, which may cause early deterioration.

In view of such circumstances, it is an object of the present invention to surely pull the middle part of the body part inward at the time of contraction so as to prevent sideways contact of luggage and improve the durability of the body part. And

[0005]

The technical means taken by the present invention to achieve the above object comprises a hollow body having a body formed of a flexible material, and a gas is injected or injected into the hollow body. In a jack device in which the body portion can be vertically expanded and contracted by discharging, the body portion is formed in a truncated conical cylindrical shape whose diameter becomes larger toward the lower side, and the body portion is provided at an intermediate portion in the up-down direction. The point is that a strip-shaped reinforcing body for restricting the outward bulging of the body portion during contraction and pulling the body portion inward is provided over substantially the entire circumference in the circumferential direction.

[0006]

By injecting or discharging gas into the hollow body of the jack device, the body of the hollow body expands and contracts, and the heavy object placed on the hollow body is moved up and down. Then, when the gas is discharged from the state where the hollow body is filled with the gas, the body portion has a truncated cone shape whose diameter becomes larger toward the lower side, so that it is bent from the upper end portion due to the weight of heavy objects. Be contracted.

At this time, since the belt-shaped reinforcing body is provided over the entire circumference of the trunk in the middle of the trunk in the vertical direction, a part of the trunk bulges outward. In addition to being regulated, the body portion provided with the reinforcing body does not bend, but the body portion bends so as to be drawn inward from the lower end of the reinforcing body, whereby the body portion contracts favorably.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 3, reference numeral 1 is a hollow body as an elevating means of the jack device, which is provided with a truncated cone-shaped barrel portion 2 and upper and lower lid members 3 and 4 for closing the upper and lower openings of the barrel portion 2. Then, by injecting or exhausting a gas such as air or exhaust gas into the hollow body 1, the body portion 2 is expanded or contracted in the vertical direction, whereby the upper lid member 3 is moved up and down, and the heavy load on the upper lid member 3 is removed. It is designed to move up and down.

The body 2 is made of a relatively soft material having flexibility such as rubber or vinyl chloride. For example, a fan-shaped sheet material is rolled into a cylinder and both ends are polymerized and bonded together. It is formed in a truncated cone shape whose diameter gradually increases toward the side. The upper and lower lid members 3 and 4 are formed of a plate material made of metal, synthetic resin, or the like, and annular joint portions 5 and 6 are integrally formed on the lower surface of the upper lid member 3 and the upper surface of the lower lid member 4, respectively.
The joint portion 5 of the upper lid member 3 and the joint portion 6 of the lower lid member 4 are internally fitted and fixed to the upper opening edge portion of the body portion 2 and the lower opening edge portion, respectively.

Reinforcing tapes 9 and 10 extending from the joints 5 and 6 to the body 2 are adhered to the upper and lower ends of the inside of the hollow body 1 along the entire inner circumference thereof, and the upper and lower edge portions of the body 2 are opened. Is prevented from peeling off from the joint portions 5 and 6. A pair of upper and lower reinforcing bodies 7A and 7B are provided on the outer peripheral surface of the body portion 2 at a midway in the vertical direction and are spaced from each other. These reinforcing bodies 7A and 7B are formed in a strip plate shape with a material having a relatively high rigidity such as metal, synthetic resin, or hard rubber, and are fixed along the entire circumference of the body portion 2.

Further, the distance between the upper and lower reinforcing members 7A and 7B, the distance between the upper reinforcing member 7A and the joint portion 5 of the upper lid member 3, and the distance between the lower reinforcing member 7B and the joint portion 6 of the lower lid member 4. Are preferably substantially equal to each other and are equal to or larger than the vertical width of each of the reinforcing bodies 7A and 7B. In the above structure, when the gas in the hollow body 1 is discharged from the state where the upper lid member 3 is in the highest position as shown by phantom lines in FIGS. 3 and 1, as shown by the solid line in FIG. Also, due to the weight of the heavy object placed thereon, the body portion 2 between the joint portion 5 and the upper reinforcing body 7A is drawn inward from the lower end of the joint portion 5 of the upper lid member 3 and bends.

Next, as shown in FIG. 2, the upper reinforcing member 7
The body portion 2 where A is fixed does not bend, and the body portion 2 between the upper and lower reinforcing bodies 7A and 7B is pulled inward from the lower end of the reinforcing body 7A and bends. Next, the body portion 2 between the lower reinforcing body 7B and the joint portion 6 of the lower lid member 4 is pulled inward from the lower end of the reinforcing body 7B and bends. In this way, the body 2 is sequentially folded into a corrugated cross section and contracts regularly.

At this time, if the distance between the upper and lower reinforcing members 7A and 7B and the distance between the upper and lower reinforcing members 7A and 7B and the joints 5 and 6 are less than the vertical width of the reinforcing members 7A and 7B, The upper and lower reinforcing bodies 7A and 7B and the joint portions 5 and 6 are displaced in the vertical direction, and the height of the upper lid member 3 at the lowest position becomes high.
Further, when gas is injected into the hollow body 1 from the above state, the body portion 2 expands by the operation reverse to the above operation.

The reinforcing body may be provided on the inner peripheral surface side of the body portion, and one to three pieces may be provided depending on the vertical length of the body portion and the like.
You may provide more than one. Further, the reinforcing body formed in a ring shape may be externally or internally fitted and fixed to the body portion. Further, the position at which the reinforcing body is provided can be variously set, and for example, as shown in FIGS. 4A to 4F, by increasing the distance between the uppermost reinforcing body 7A and the joint portion 5 of the upper lid member 3, The body 2 between the reinforcing body 7A and the joint 5 is set to be bent twice, and the interval between the reinforcing bodies 7A, 7B, 7C is set to be substantially the same as the vertical width of the reinforcing bodies 7A, 7B, 7C. You may set it.

[0015]

According to the present invention, when the gas filled in the hollow body is discharged to contract the body, the reinforcing member causes a part of the body to expand outward in the middle of the body in the vertical direction. Outgoing is regulated, and the trunk is reliably pulled inward, so that the trunk can be contracted well, so it is possible to effectively prevent sideways contact of luggage during contraction and durability of the trunk. Can be improved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an operating state of a hollow body of a jack device.

FIG. 2 is a side sectional view of the same.

FIG. 3 is a partial cross-sectional side view showing the entire hollow body.

FIG. 4 is a side sectional view showing a working state of a hollow body of a modified example.

[Explanation of Codes] 1 Hollow body 2 Body part 7A Reinforcement body 7B Reinforcement body

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Delete

Claims (1)

[Claims] 1. A hollow body (1) having a barrel portion (2) formed of a flexible material in the shape of a truncated cone. The hollow body (1) is filled with a gas or discharged to form a barrel. Department (2)
In a jack device capable of expanding and contracting in the up-down direction, a body part (2) at the time of contraction is provided at an intermediate part in the up-down direction of the body part (2).
2. A jack device, characterized in that strip-shaped reinforcing bodies (7A), (7B) for restricting outward bulging of the body and pulling the body portion (2) inward are provided over substantially the entire circumference in the circumferential direction.