JP2000016724A - Elevator lifting air bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a function of an air bag by enhancing air seal performance of a connection part formed by sewing of the air bag, and preventing the leakage of air from a seam and a needle hole in the connection part or preventing damage thereto even in the case of increasing an internal pressure of the air bag. SOLUTION: This elevator lifting air bag is formed such that a plurality of air bag main units 22 constituted into bag shape by connecting the outer periphery of a double-sheet piled cloth material 24 by sewing are piled in many steps, and the inside of the mutually adjacent air bag main units 22 is connected to each other by a communication hole 26, similarly the mutually adjacent air bag main units 22 are connected to each other by sewing in the periphery of the communication hole 26. Each of these connection parts 30, 40 formed by sewing is applied with a coating by resin materials 34, 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator airbag for raising and lowering a car of an elevator disposed above the airbag by inflating or deflating a plurality of airbag bodies stacked in multiple stages.

[0002]

2. Description of the Related Art An airbag of this kind is formed by sewing a plurality of cloth materials superposed on each other to form a bag-like airbag body in a state where the insides of the airbags communicate with each other. Multi-tiered. Then, the air is sent into the airbag by a blower or the like, or the sent air is discharged to raise and lower the elevator car.

[0003]

When the elevator airbag is inflated, a load corresponding to the weight of the elevator car and its load is applied thereto, and the internal pressure increases based on the load. This internal pressure acts to push and widen the stitches and needle holes at the sewn portions of each airbag body formed by sewing the cloth material as described above, which may cause air leakage. If the amount of air leakage increases, the speed at which the elevator rises decreases, and if the amount of air leakage exceeds the amount of air supplied by a blower or the like, it becomes impossible to raise the elevator itself.

It is an object of the present invention to improve the air-sealing property of a joint by sewing an airbag, and to allow air to leak from a seam or a needle hole of the joint even when the internal pressure of the airbag increases. Alternatively, the function of the airbag is maintained by preventing the joint from being damaged.

The object of the invention according to claim 2 is that, in addition to the above-mentioned object, the joint at the outer periphery of each airbag body is more robust,
And to have excellent durability.

It is an object of the present invention to provide a method for coating a joint portion with a resin material.

[0007]

According to the first aspect of the present invention,
A plurality of airbag bodies configured in a bag shape are stacked in multiple stages by joining the outer periphery of the cloth material superimposed on two pieces by sewing, and the insides of adjacent airbag bodies are communicated with each other by a communication hole, An elevator elevating airbag in which adjacent airbag bodies are joined to each other by sewing around a communication hole, wherein each joined portion of the sewing is coated with a resin material.

As a result, the seam and the needle hole of each joint are closed by the resin material, and the air sealing property of the joint against the internal pressure of the airbag is improved. Therefore, even when the internal pressure of the airbag increases, it is possible to prevent a situation such as leakage of air from the seam or the needle hole of the joint portion or breakage of the joint portion, and it is possible to properly maintain the function as the elevator airbag.

According to a second aspect of the present invention, there is provided the elevator ascending and descending airbag according to the first aspect, wherein a joint of the outer periphery of each airbag body is formed by folding one or both outer peripheral portions of the two cloth materials. It is characterized by being sewn.
In this case, the strength of the joint at the outer periphery of the airbag main body due to its sewing is increased, and a robust and durable airbag can be provided.

According to a third aspect of the present invention, there is provided the elevator airbag according to the first aspect, wherein each of the joints is coated with a resin material on both sides of a cloth material. And

According to a fourth aspect of the present invention, there is provided the elevator airbag according to the first aspect, wherein the coating of each of the joints is sewn with a resin material interposed between cloth materials. It is characterized by.

According to a fifth aspect of the present invention, there is provided the elevator airbag according to the first aspect, wherein the coating at each of the joints is formed by applying a resin material to these joints. And

According to the third to fifth aspects of the present invention, it is possible to select the type of coating with the resin material according to the position and specifications of the joint.

[0014]

Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing an outline of an airbag type elevator. In this elevator, an elevator airbag 20 is provided on an upper surface of a base frame 10, and an elevator car 16 is arranged on the airbag 20. The car 16 is provided with the base frame 10 by inflating or deflating the airbag 20.
Move up and down along the pillars 12 erected at the four corners.

FIG. 2 shows an air bag 20 for elevating the elevator.
FIG. As is apparent from this drawing, the airbag 20 has a configuration in which a plurality of (five) bag-shaped airbag bodies 22 are stacked in multiple stages. The insides of the adjacent airbag bodies 22 communicate with each other through a communication hole 26 formed substantially at the center of each. That is, the insides of the airbag bodies 22 are connected to each other by the respective communication holes 26. Then, by blowing low-pressure air from the communication hole 26 of the airbag body 22 located at the lowermost position by the blower 18 shown in FIG. 1, the airbag 20 is inflated.

Each airbag body 22 is formed in a bag shape by laminating two cloth materials 24 which impervious or impervious to air at all, and joining the outer periphery thereof by sewing. In addition, the adjacent airbag body 22
Are joined to each other by sewing around the respective communication holes 26, whereby the airbag bodies 22 are integrated in a multi-stage shape. Note that the outer periphery of the two cloth materials 24 is joined to the outer periphery joining portion 30 and the communication holes 26 are formed.
Is defined as an inner peripheral joint 40.

The procedure for constructing the airbag 20 is as follows. As shown in FIG. 3, each one of the cloth materials 24 of the adjacent airbag bodies 22 is overlapped with each other to sew the respective inner peripheral joints 40 first. I do. At this time, the communication holes 26 of the respective cloth materials 24 are aligned so as not to shift. Next, the two cloth materials 24 constituting each airbag body 22 are overlapped, and the outer peripheral joint portions 30 are sewn. As a result, the five airbag bodies 22 are connected in a multi-stage manner, and the inside of each is connected to one by the communication hole 26 to form the airbag 20.

FIG. 4 is a sectional view showing a part of the airbag 20 in an enlarged manner. As is apparent from this drawing, the outer peripheral joint portion 30 is obtained by sewing the outer peripheral ends of two superposed cloth materials 24 with sewing threads 32. A thermosetting resin material 34 such as a silicone resin or a urethane resin is applied to both surfaces of the sewn portion, and is cured by heating. As a result, the stitches and needle holes of the sewing thread 32 are sealed with the resin material 34.

The inner peripheral joint 40 is sewn together with a sewing thread 42 with a foam rubber 44 interposed between one of the cloth materials 24 constituting the adjacent airbag body 22. The same thermosetting resin material 34 as in the case of the outer peripheral joint portion 30 is applied to both surfaces of the sewn portion and cured by heating to seal the stitches and needle holes of the sewing thread 42.

In the airbag 20 configured as described above, the outer peripheral joint portion 30 and the inner peripheral joint portion 40 have high sealing performance against internal pressure when the airbag 20 is inflated. Therefore, even when the internal pressure of the airbag 20 increases due to the weight of the elevator car 16 and its load, the situation such as air leakage from the joints 30 and 40 or breakage of the sewn portion can be avoided. The resin materials 34 and 46 for coating the outer peripheral joint portion 30 and the inner peripheral joint portion 40 use a resin-based adhesive or a film (hot melt film) or a woven fabric coated with a thermosetting resin. You can also.

FIGS. 5 to 7 are sectional views showing various forms of the outer peripheral joint 30. As shown in FIGS. First, in FIG. 5A, a resin film 36 (hot melt film) is sandwiched between two superposed cloth materials 24 and sewn with sewing thread 32. By heating the outer peripheral joint portion 30 after the sewing, the two cloth materials 24 are brought into close contact with the film 36 without any gap. Therefore, the outer peripheral joint portion 30 is also coated with the resin by the film 36, and the sealing performance against air leakage is sufficiently ensured.

In FIG. 5B, a film 36 is sandwiched between two cloth materials 24, sewn with sewing threads 32, and a thermosetting resin material 34 is applied to both surfaces of the sewn portion and heated. are doing. Thereby, the sealing function of the outer peripheral joint portion 30 is further improved. The resin material 34 in FIG. 5B may be replaced with an adhesive tape or the like.

In FIG. 6A, after two pieces of cloth material 24 are sewn with sewing thread 32, a thermosetting resin material 50 is applied to the entire sewn portion and cured by heating.
In FIG. 6B, after sandwiching the film 36 between the two cloth materials 24 and sewing with the sewing thread 32, the resin material 50 is applied to the entire sewn portion and heated.

In FIG. 7A, the overlapped portion of the two cloth materials 24 is folded and sewn with the sewing thread 32, and then a thermosetting resin material 60 is applied to the entire sewn portion and heated. ing. By folding and sewing the overlapped portion of the cloth material 24 and coating it with the resin material 60 in this manner, the airbag 20 becomes robust, and the sealing function against air leakage is further enhanced. Regarding the folding, the strength of the sewn portion can be sufficiently increased even if only one of the two cloth materials 24 is folded.

In FIG. 7B, a film 62 is sandwiched between two cloth materials 24 and folded, and the folded portion is sewn with a sewing thread 32. After this sewing, the outer peripheral joint 3
By heating 0, the two cloth materials 24 adhere to each other, and the outer peripheral joint portion 30 is coated with the resin. Further, as shown in FIG. 7 (C), a thermosetting resin material 60 is applied to the entire outer peripheral joint portion 30 and heated, whereby the sealing function of the outer peripheral joint portion 30 is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of an airbag type elevator.

FIG. 2 is a sectional view showing an elevator elevating airbag.

FIG. 3 is a cross-sectional view illustrating a state in the middle of forming an airbag.

FIG. 4 is an enlarged cross-sectional view of a part of the airbag.

FIG. 5 is a cross-sectional view illustrating one form of an outer peripheral joint portion in the airbag.

FIG. 6 is a cross-sectional view showing another embodiment of the outer peripheral joint portion in the airbag.

FIG. 7 is a cross-sectional view illustrating still another form of the outer peripheral joint portion in the airbag.

[Explanation of symbols]

 Reference Signs List 20 airbag 22 airbag body 24 cloth material 26 communication hole 30 outer peripheral joint 34 resin material 36 film (resin material) 40 inner peripheral joint 46 resin material 50 resin material 60 resin material 62 film (resin material)

Claims (5)

[Claims] A plurality of bag-shaped airbag bodies are stacked in a multi-stage by joining outer peripheries of two cloth materials by sewing, and a communication hole is formed between adjacent airbag bodies. An elevator airbag for elevator lifting, in which the adjacent airbag bodies are connected to each other by sewing around the communication hole,
An elevator ascending / descending airbag, characterized in that the joints formed by sewing are coated with a resin material. 2. The elevator airbag according to claim 1, wherein an outer peripheral portion of each airbag body is sewn by folding one or both outer peripheral portions of two cloth materials. An elevator airbag for lifting elevators. 3. The elevator airbag according to claim 1, wherein the coating at each of the joints is a structure in which both surfaces of a cloth material are covered with a resin material. bag. 4. The elevator airbag according to claim 1, wherein the coating at each of the joints is a structure in which a resin material is sandwiched between cloth materials and sewn. For airbags. 5. The elevator air bag according to claim 1, wherein the coating at each of the joints is a structure in which a resin material is applied to these joints. bag.