JPH0816408B2 - Membrane-like body prevention method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for preventing flaking of a membranous body, and particularly to a membranous body at the time of constructing a membranous structure such as an air membrane structure, a suspension structure or a skeleton membrane structure. It relates to a method for preventing flapping when it is fanned.

(Prior Art) In recent years, research and development of membrane structures have progressed, and the range of use thereof has expanded. An example of the membrane structure will be described below with reference to FIGS. 2 and 3.

FIG. 2 is a perspective view showing a part of the roof of the membrane structure,
Further, FIG. 3 is a sectional view of an essential part of the membrane structure taken along the line aa in FIG.

In FIG. 2, 10 is a beam of the roof of the membrane structure, 12 is a membrane forming the roof, and 14 is a holding cable. In the membrane structure shown in the figure, first, the membranous body 12 is stretched between the adjacent beams 10 in a slackened state without tension. FIG. 3 shows the state of the membranous body 12 expanded in the slackened state.

After that, arrange the presser cable 14 in the central part of the membranous body 12,
Tension was introduced into the presser cable to tension the film body 12. As a result, the roof has an uneven shape in which the beam 10 is a mountain and the holding cable 14 is a valley.

(Problems to be Solved by the Invention) However, in the construction of the above-mentioned membrane structure, one day without reaching the process step of tensioning the membrane-like body 12 stretched between the beams 10 with the holding cable 14. May have to be completed or the construction work may be temporarily stopped due to bad weather such as a typhoon. Beams in such cases
If the membranous body 12 between 10 is left slack without being strained, the membranous body 12 left slackened by a strong wind such as a typhoon
Causes the surface vibration as shown by the one-dot chain line 12a and the flutter as shown by the two-dot chain line 12b in FIG. 3, and the film body 12 vibrates significantly.

Therefore, there is a problem in that an unreasonable force is applied to the film body 12 and the film body 12 is damaged due to partial stress concentration, or in some cases, the film structure under construction is damaged. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for preventing flaking of a film-form body that can prevent vibration of the film-form body due to strong winds in order to solve the above-mentioned conventional problems.

(Means for Solving the Problem) In order to achieve this object, a method for preventing curling of a membranous body according to the present invention is such that a membranous body is stretched in a state of being slackened between supporting members, When tension is applied to the presser cable placed in the center of the film, the film-like body is slackened between the support members when the tension is applied so that the support member has a peak and the presser cable has a valley. The membranous body expanded with
If you cannot reach the process stage of tensioning with the presser cable,
The pressing member is brought into contact with one side of the film-like body, and a tension member is provided between the pressing member and the support member. One end of the tension member is detachably locked to the one support member and the tension member of the tension member is attached. The other end is detachably locked to the other support member via the lever block, and tension is introduced to the tension member via the lever block to hold the force in the direction from one side of the film-shaped body to the other side. By exerting on the member, the film body is temporarily tensioned to prevent the film body from being twisted.

(Operation) According to such a method, when the process step of tensioning the stretched film-shaped body with the pressing cable between the support members is not reached, the pressing member is connected to one side of the film-shaped body. Since a tension member is provided between the pressing member and the supporting member so as to contact with each other, and a tension is introduced into the tension member to exert a force in the direction from one side of the film-shaped body to the other side on the pressing member, The membrane is pushed from one side of the membrane to the other side. Therefore, even if the membrane-like body is slackened and stretched between the supports, the membrane-like body can be tensioned when the process step of tensioning the membrane-like body with the holding cable has not been reached.

Moreover, one end of the tension member is detachably locked to one support member, and the other end of the tension member is detachably locked to the other support member via the lever block, and the tension member is engaged to the lever block. Since tension is introduced to temporarily tension the film body, the work of tensioning the film body can be easily performed by operating the lever block. Further, the film-shaped body can be tensioned with a simple structure in which the tension member is locked to the support body via the lever block.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the drawings are only schematically illustrated to the extent that the present invention can be understood, and therefore, the shapes, arrangement positions and dimensions of the respective constituent components are not limited to the illustrated examples.

FIGS. 1 (A) to 1 (D) are diagrams for explaining the embodiment of the present invention, showing a process of introducing tension for preventing the membrane-like body from being twisted into a membrane-like body that is slackened and stretched. It is sectional drawing shown stepwise and schematically.

In FIG. 1 (A), 16 is a film-like body and 18 is a support for supporting the film-like body. In FIG. 1A, the film-like body is slackened between the supports 18 which are spaced apart from each other. 16 are on display.

As shown in FIG. 1 (A), the film-like body 16 is pressed to hold the cable.
In order to prevent the film-like body 16 in a slackened state from tilting in the case where the tensioning process step 14 (see FIG. 2) has not been reached, in this embodiment, first, as shown in FIG. The pressing member 20 is placed on the film-shaped body 16 in contact with one side 16a of the film-shaped body 16.

The shape and forming material of the pressing member 20 can be any suitable one, but it is preferable that the pressing member 20 is a flexible material that does not damage the film-like body 16. For example, the pressing member 20 may be formed of styrofoam or an air tube. In this case, the pressing member 20 that is lightweight and easy to carry and therefore can be easily placed on the stretched film-like body 16 can be obtained. it can. In this embodiment, the holding member 20 is shaped such that the outer surface of the holding member 20 forms a cylindrical surface.

Next, as shown in FIG. 1C, a tension member 22 is provided between the pressing member 20 and the support member 18.

In this embodiment, for example, one end of a rope-shaped tension member 22 is detachably locked to one support member 18, and the other end is detachably attached to the other support member 18 via a tension introducing device 24 called a lever block. Lock freely. As a result, the pressing member 20 is placed so as to be sandwiched between the tension member 22 and the film-shaped body 16.

Next, as shown in FIG. 1 (D), the tension introducing device 24
Is operated to apply tension to the tension member 22 and press the force in the direction P from the one side 16a of the film body 16 toward the other side 16b.
Affect. The force in this direction P is applied via the pressing member 20 to the film body.
By exerting on 16, the slackened membranous body 16 is strained.

The tension applied to the tension member 22 is arbitrarily and appropriately adjusted to provide the film-shaped body 16
By maintaining the strained state of the film, it is possible to prevent the membranous body 16 from being blown by the wind.

As described above, when the process step of tensioning the film-like body 16 with the presser cable 14 has not been reached, the presser member 20 and the tension member 22 are provided.
Further, the tension introducing device 24 temporarily tensions the film body 16 to prevent the film body 16 from being twisted. After that, when tensioning the film-like body 16 with the pressing cable 14, the pressing member 20 and the tension member
22 and the tension introducing device 24 are removed to release the temporary tension of the film body 16, and then the pressing cable 14 is arranged at the center of the film body 16 in the same manner as shown in FIG. By introducing tension, the film-like body 16 is tensioned so that the support member 18 becomes a peak and the holding cable 14 becomes a valley.

The present invention is not limited to the above-described embodiments, and therefore, the constitution, shape, size, arrangement position, numerical conditions, forming material and the like of each constituent can be arbitrarily changed.

For example, in the above-described embodiment, the holding member and the tension member in the separated state are used in combination, but in addition to this, the holding member and the tension member integrated in advance may be used.

(Effects of the Invention) As is apparent from the above description, according to the method for preventing warping of a membranous body of the present invention, when the process step of tensioning the membranous body with the retaining cable has not been reached, the retaining member is attached to the membrane. The tension member is provided between the pressing member and the support member while being brought into contact with one side of the film-like body, and a tension is introduced into the tensioning member to force the film body from one side to the other side. Is exerted on the pressing member, the film body is pushed from one side of the film body to the other side. Therefore, when the process step of tensioning the membrane with the pressing cable is not reached, even if the membrane is slackened between the supports and stretched, it is possible to temporarily tension the membrane, so that a typhoon or other It is possible to prevent the membranous body from being blown by the strong wind. For this reason, it is possible to prevent the film body from being damaged by the wind and damaging the film body and / or the film structure.

Moreover, one end of the tension member is detachably locked to one support member, and the other end of the tension member is detachably locked to the other support member via the lever block, and the tension member is engaged to the lever block. Since tension is introduced to temporarily tension the film body, the work of tensioning the film body can be easily performed by operating the lever block. Moreover, the film-like body can be tensioned with a simple structure in which the tension member is locked to the support body via the lever block. Therefore, it is possible to prevent the film body from being twisted by temporarily tensioning the film body with good workability and a simple structure.

[Brief description of drawings]

1 (A) to 1 (D) are views for explaining an embodiment of the present invention, FIG. 2 is a perspective view showing a part of a roof of a membrane structure, and FIG. 3 is a- in FIG. It is a principal part sectional drawing of the film | membrane structure taken along the a line. 16 …… Membrane, 18 …… Supporting member 20 …… Holding member, 22 …… Stretching member.

Claims (1)

[Claims] 1. A film-like body is stretched in a state of being slackened between supporting members, and then tension is introduced into a holding cable arranged in the central portion of the film-like body to form a ridge at the supporting member. When tensioning the film-like body so as to form a valley at the portion of the presser cable, the film-like body stretched in a state of being slackened between the support members,
When the step of tensioning with the presser cable is not reached, the presser member is brought into contact with one side of the film body, and a tension member is provided between the presser member and the support member, and one end of the tension member is provided. Is detachably locked to one support member, the other end of the tension member is detachably locked to the other support member via a lever block, and tension is introduced to the tension member via the lever block. Then, by exerting a force in a direction from one side of the film-shaped body to the other side on the pressing member, the film-shaped body is temporarily tensioned to prevent the film-shaped body from being warped. A method for preventing the film-like body from being warped.