JPH0429833B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a membrane body deployment device used in constructing a membrane structure.

(Prior Art) Membrane structures in which the roof portion and the like are formed of membrane surfaces are being built in various places because they are easy to construct and can be finished at low cost. In recent years, membrane structures of this type with a length or diameter of one side exceeding 200 m have appeared.

As the size of the membrane structure itself increases in this way, no matter how easy the membrane structure is to construct, various problems will arise during on-site work. In particular, when installing a membrane on the roof of a membrane structure, the membrane is fastened between multiple ropes that are stretched relatively freely, but the membrane itself As membrane structures have become larger, they have become larger and heavier, and this work has to be done at high places. There is a high possibility that the membrane will be blown up by the wind and become dangerous.

Conventionally, the work of stretching this membrane was carried out by a worker manually spreading the membrane wound into a roll using a safety net on a rope located at a high place. This was done by attaching the body to the rope.

In order to avoid such dangerous manual work, for example, as shown in Figure 1 of Japanese Unexamined Patent Publication No. 1433/1983, the membrane body brought to the site in the form of a roll is loaded onto a crane. It is also done by hoisting it up and unraveling it one by one to perform the tensioning work.
However, since the supports for the rolls commonly used in the past are of a fixed size,
It was necessary to prepare as many types as the number of rolls. A roll wrapped with a membrane is quite heavy, so the thing that supports the roll must also be quite large and heavy, but there are many types of things that can support such a roll. Preparing them was extremely inconvenient during actual tensioning work.

(Problems to be solved by the invention) The present invention has been made in view of the above-mentioned circumstances, and the problems to be solved are that the danger has increased as the membrane structure itself has become larger. It is an object of the present invention to provide a membrane body deployment device having a simple structure, which allows the tensioning work of the membrane body to be carried out in a safe state, and which can easily cope with changes in the type of roll.

(Means for Solving the Problems) In order to solve the above problems, the means taken by the present invention are explained with reference numerals used in the embodiments. A support beam 20 configured to obtain a support beam 20, a support stand 30 attached to the bottom of both left and right ends of this support beam 20, and a pair of these support stands 30.
A membrane deployment device 100 comprising a support roller 40 rotatably and removably suspended therebetween, and a brake device 50 provided on one or both of the pair of support stands 30 to brake the rotation of the support roller 40. In this, the brake device 50 includes a support plate 51 attached to the support stand 30, and a brake system that slides on the outer periphery of a brake drum 54, one end of which is pivotally supported by the support plate 51 and integrally formed with the support roller 40. A pair of brake bands 52 having a brake band 53, a control arm 56 that opens and closes each brake band 52 via a link member 55 connected to the other end of each brake band 52, and a control arm 56 and a support plate 51. The membrane body deployment device 100 is characterized by comprising a tension spring 57 connected between the brake bands 52 and 57 to always bias the control arm 56 in the tightening direction of each brake band 52.

Next, this configuration will be sequentially explained according to specific examples shown in the drawings.

In FIG. 1, when constructing the membrane structure 10 shown in FIG. 2 and FIG. The rotated membrane body 12 is shown being attached to each wire rope 11 while being expanded little by little using the membrane body deployment device 100 according to the present invention. Then, the membrane body deployment device 100
is mainly composed of a support beam 20, a support stand 30, a support roller 40, and a brake device 50.

As shown in Fig. 4, the support beam 20 is made by connecting horizontally long H steel divided into three parts, and a rope 61 suspended by a crane 60 or the like is hung on the upper surface of the support beam 20. A hanging member 22 for mounting is attached. Moreover, as mentioned above, this support beam 20 is divided into three parts, and as shown in FIGS. 5 and 6, each divided H steel is connected to each other using a joint member 21. It is configured. By changing the length of the central H steel, the overall length of the support beam 20 in the lateral direction can be changed as appropriate, and between the pair of support stands 30 fixed to the lower left and right ends of the support beam 20. The width of the membrane body 12 supported by the width of the membrane body 12 can be freely adjusted.

As shown in FIGS. 7 and 8, each support stand 30 is removably attached to the lower surface of both left and right ends of the support beam 20 by using bolts and nuts 31, and is attached to the lower part thereof. supports the rotating shaft 32 horizontally and rotatably. Each of these support stands 30 rotatably supports a support roller 40 that winds up the film body 12 via its respective rotation shaft 32,
In this example, by removing the support stand 30 on the left side in the figure, the support roller 40 without the film body 12 can be removed.
The support roller 40 can be replaced with a new support roller 40. Furthermore, a brake device 50 is attached to the support stand 30 located on the right side in the figure.

As shown in FIG. 4, the support roller 40 has a long cylindrical shape and is disposed between both support stands 30, and at least one end thereof has a brake, which will be described later, as shown in FIG. A brake drum 54 constituting the device 50 can be integrally fitted and fixed. That is, as shown in FIG.
is wound in a factory or the like, but when the support roller 40 around which the membrane body 12 is wound is installed between the support stands 30, the brake drum 54 is exposed from the end of the membrane body 12.

The brake device 50 includes a support plate 51 attached to the inside of the right support stand 30, and a pair of brake bands 52 with one end pivotally supported on the support plate 51.
The brake drum 54 is provided with a brake drum 54 whose rotation is braked by the sliding action of a brake shoe 53 fixed to the inside of the pair of brake bands 52. The other end of each brake band 52 is connected to a link member 55 rotatably supported by a portion of the support plate 51, and a control arm 56 is connected to these link members 55. This control arm 56
is rotatably attached to the support plate 51 via a connecting pin 56a, and by moving its right end downward, each link member 55 is opened and the brake band 52 connected thereto is attached to the brake drum 54. By moving the right end portion upward in the opposite direction, each link member 55 is closed, and the brake band 52 connected thereto is strongly pressed against the brake drum 54.

Further, a part of the control arm 56 is connected to the other end of a tension spring 57 whose one end is supported on the support plate 51 side, and this tension spring 57 constantly raises the control arm 56 by its urging force. It is working to move. Therefore, in the brake device 50, unless the operator moves the control arm 56 downward, the control arm 56 is always urged upward, and the brake drum 54 is always activated in both forward and reverse directions. Rotation is prevented, that is, the brake shoe 53 is maintained in a tightened state.

(Aspects of Use and Effects) Next, aspects of the case where the membrane body deployment device 100 according to the present invention configured as described above is used will be described. First, the membrane body deployment device 1 placed on the ground
In addition to removing the support stand 30 located on the left side of 00, in order to match the length of the support roller 40 on which the membrane body 12 was wound up with the length of the support beam 20, the center of the H steel divided into three parts was appropriately cut. change. This change is not only easy because each H steel is connected via the joint member 21, but also can be done by simply preparing multiple types of central H steel with different lengths. It is something. Then, the right side of the support roller 40 on which the film body 12 is wound is fitted onto and fixed to a part of the brake drum 54, and the left side of the support roller 40 is further supported by the support stand 30.

In this case, since the brake device 50 can prevent both the forward and reverse rotations of the brake drum 54 and therefore the support roller 40 as described above, the direction in which the membrane body 12 is taken out is determined by the direction in which the membrane body is disposed. It does not matter whether it is in the front or the rear of the device 100. Note that the winding of the membrane body 12 around the support roller 40 is completed in advance at a manufacturing factory of the membrane body 12 or the like. The membrane body deployment device 100 with the membrane body 12 set in this way is moved by a crane 6.
0 or the like to a predetermined position on the membrane surface structure 10. In this case, since the support roller 40 winding up the membrane 12 is prevented from rotating by the brake device 50, the membrane 12 will not be inadvertently expanded during the lifting process.

When the membrane deployment device 100 has been lifted to a predetermined position on the wire rope 11 constituting the membrane surface structure 10 in this way, the operator moves the control arm 56 of the brake device 50 down to begin the installation work. The supporting roller 40 supports the necessary and sufficient number of membrane bodies 12.
Rewind from In this case, if a flexible item such as a string is connected to the tip of the control arm 56 and the string is pulled, the pulling operation can be performed more safely. When the operator releases the control arm 56 after the necessary and sufficient membrane 12 has been deployed, the tension spring 57 of the brake device 50 causes the brake device 50 to
0 is activated and further expansion of the membrane body 12 is immediately stopped.

When the expansion of this membrane body 12 is prevented,
The operator connects and fixes the periphery of the unfolded membrane body 12 to each wire rope 11. In this case, since the membrane body 12 is deployed only in an amount necessary and sufficient for the installation work, the membrane body 12 may be blown by the wind at a high place, or the membrane body 12 that has been deployed may be
2 will not interfere with your work. Once this connection and fixation is completed, a necessary and sufficient amount of the membrane body 12 may be deployed from the support roller 40 by operating the brake device 50, as in the previous case.

By repeating the above steps,
When all the membrane bodies 12 wound around the support roller 40 have been attached to each wire rope 11, the membrane body deployment device 100 is lowered to the ground.
The next membrane body 12 may be attached to the membrane body deployment device 100 in the same manner as described above. By sequentially performing the above operations, the construction work of the membrane structure 10 can be performed in a safe manner.

(Effects of the Invention) As described above in detail, by using the membrane body deployment device 100 according to the present invention, the membrane body tensioning work, which has become more dangerous as the membrane surface structure itself becomes larger, can be carried out safely. Not only can it be done in a stable condition, but also the type of membrane can be changed by always using the H steels located on both the left and right sides of the H steel divided into three parts, and changing only the central H steel to ones with different lengths. It is possible to provide a membrane deployment device with a simple structure that can sufficiently and easily respond to changes and also enables safe work as described above.

Moreover, according to this membrane body deployment device 100, the membrane body 12 can be safely removed and deployed when necessary. That is, the brake device 50 configuring this membrane body deployment device 100 is as follows:
The membrane body 12 cannot be unwound unless the control arm 56 is operated by the operator, and the unwinding can be done simply by the operator pushing the control arm 56. This allows the work of deploying the membrane body 12, which is susceptible to wind force, to be carried out safely.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the state in which the membrane body is fixed to each wire rope using the membrane body deployment device according to the present invention, FIG. 2 is a front view of the membrane surface structure, and FIG.
The figure is a plan view of the same, FIG. 4 is an enlarged front view of the membrane body deployment device, and FIG. 5 is a partial enlarged view of the - line part in FIG. 4.
Figure 6 is a side view of Figure 5, Figure 7 is a side view of Figure 4.
An enlarged front view of the lined part, Figure 8 is a side view of Figure 7,
9 is an enlarged partial longitudinal sectional view taken along the line - in FIG. 4, and FIG. 10 is a partial vertical sectional view taken along the line - in FIG. 9. Explanation of symbols, 100... Membrane body deployment device, 10... Membrane surface structure, 11... Wire rope, 12... Membrane body,
20...Support beam, 22...Suspension member, 30...Support stand,
32... Rotating shaft, 40... Support roller, 50... Brake device, 52... Brake band, 53... Brake shoe, 54... Brake drum, 55... Link member, 56... Control arm, 57... Tension spring, 60... Crane.

Claims (1)

[Scope of Claims] 1. A support beam that can be suspended by a crane or the like, a support stand attached to the bottom of both left and right ends of the support beam, and a rotatable and removable structure between the pair of support stands. A membrane body deployment device comprising a support roller suspended from a support roller, and a brake device provided on one or both of the pair of support stands to brake rotation of the support roller, wherein the brake device is attached to the support stand. a pair of brake bands each having one end pivotally supported by the support plate and having a brake shoe slidingly in contact with the outer periphery of a brake drum integrally formed with the support roller; A control arm that opens and closes each of the brake bands via a link member connected to each other end; and a control arm that is connected between the control arm and the support plate to always bias the control arm in the tightening direction of each of the brake bands. A membrane deployment device comprising a tension spring.