JP2796815B2 - Method of introducing tension in openable membrane structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for introducing tension into a film material in a suspension film structure capable of opening and closing the film material.

(Prior Art and Problems to be Solved by the Invention) At present, the types of membrane structures that are widely used include an air membrane structure, a suspension membrane structure, and a skeleton membrane structure.

In such a structure having the conventional film structure, the lighting conditions are improved by devising the material of the film material, but the openness of the space particularly when used as a sports facility is improved. Had problems.

In recent years, it has been proposed that the roof surface of the membrane structure can be opened and closed as required. However, it is important for the suspension type membrane structure to make full use of the tension resistance of the membrane material. In the method of folding the membrane material itself to an open state and stretching the membrane material to the original closed state, it is necessary to introduce tension into the membrane material each time the membrane material is returned from the open state to the closed state. Become.

Therefore, in the above-described method of opening and closing the film material itself, the structure for introducing tension into the film material also requires rationality, easy operation, and the like.

The present invention has been developed in view of the above-described conventional problems, and provides a method for introducing tension in an openable / closable membrane structure based on a novel composite membrane structure, which has the advantages of the above membrane structures. The purpose is to:

(Means for Solving the Problems) In order to achieve the above object, the method for introducing tension in the openable / closable membrane structure according to the present invention includes disposing a continuous linear member along the suspension member, A first pulley is disposed at an upper end of each lifting member, and a pair of second pulleys each fixed to the suspension member are disposed immediately above each lifting member. From one side to the other second pulley via each first pulley, and connect one end of the linear material to a tensioning device provided at one end of the suspension material. In addition, the other end of the linear material is turned back to the opposite end via a pulling pulley, and is fixed to the suspension material at a position immediately above the pair of second pulleys, and is disposed. From each third pulley to the tensioning device Connect
Each of the lifting members is simultaneously lifted upward by a predetermined distance by winding the filament material by the tensioning device,
A predetermined tension is introduced into the film material.

Further, of the respective lifting members, only one of the lifting members is set in advance to the length of the tensioned state after the introduction of the tension to the film material, and the upper end is fixed to the center position of the filament material. It is good also as a structure to keep.

Further, a configuration may be adopted in which all of the respective lifting members are set in advance to the length of the tension state after the introduction of the tension to the film material.

Note that the third pulley may be omitted depending on conditions.

(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

1 to 7 show an embodiment of the present invention. FIG. 1 is a perspective view of a main part showing an increased structure according to this embodiment. FIG. 2 is a plan view showing a schematic configuration of the film structure. FIG. 3, FIG. 3 is a side view of FIG. 2, FIG. 4 is a cross-sectional view taken along line AA, and FIG. 5 is an end view showing a planar configuration of the film material.

As shown in FIG. 1, a suspension membrane structure according to this embodiment includes a suspension cable 10 as a suspension material and a strut cable 11 as a lifting material.
, A film material 12 and a holding cable 13.

The suspension cables 10 are arranged in parallel at predetermined intervals and have a downwardly curved arc shape as shown in FIG. 1 and FIG.

From each suspension cable 10, in this embodiment, 7
The strut cables 11 are suspended downward, and the membrane material 12 is suspended by the respective strut cables 11 via suspension fittings 11a.

Further, at an intermediate position between the suspension cables 10, a pressing cable 13 is disposed on the film material 12 in parallel with the suspension cable 10 on a plane, and each suspension cable 10 is provided with a tension means described later. Thus, tension is applied to the membrane material 12 via the strut cable 11.

2 to 5, reference numeral 14 denotes a girder member arranged in the row direction at both ends of the suspension cable 10, and 15 denotes trusses arranged at both ends in the row direction of the structure to resist horizontal force. A stiffener 16 is a column material arranged at both ends of each suspension cable 10.
A horizontal member 17 and an auxiliary column member 18 protrude outward from the first and second reinforcing wires 19 and a second reinforcing wire 20.
Are provided to form a truss as shown in FIG.

Also, as shown in FIG. 3 and FIG.
Beam members 21 erected between the columns 16, 16 are disposed at both end positions of the column member 16, and brace members 22 are respectively provided between the upper and lower ends of the column members 16 and the beam members 21 at both end positions of the holding cable 13. , 23 are installed.

Further, as shown in FIG. 5, wire members 24 are respectively stretched between the beam members 21 at both ends of the holding cable 13 and the tip of the horizontal member 17.

In this embodiment, both ends of each suspension cable 10 and both ends of each holding cable 13 are supported by both ends of a supporting member (for each suspension cable 10, the large beam member 14, each holding cable 13). Is slidable in the row direction along the beam 21).

Therefore, in the present embodiment, the stiffener 15 provided at one end in the girder direction is driven toward the other end in the girder direction by a predetermined driving device, so that each suspension cable 10 and The film material 12 can be opened and closed together with the cable 13.

In this embodiment, a means for introducing tension to the film material 12 as shown in FIGS. 6 and 7 is provided.

That is, one continuous linear material 30 is disposed along the suspension cable 10, and a first pulley 33 is provided at the upper end of each strut cable 11 via a rotation shaft 31 and a shaft support rod 32. It is arranged rotatably.

A support member 34 is fixed to the suspension cable 10 at a position directly above each strut cable 11, and a pair of first and second bearing plates 35 and a rotating shaft 36 are formed integrally with the support member 34. Two pulleys 37 are rotatably arranged.

At the position of each strut cable 11, the linear material 30 is hung down after engaging with one of the second pulleys 37 as shown in FIG. And one end 30a of the linear member 30 is provided with a tension device as a tension device disposed on the corresponding one end of the suspension cable 10. It is connected to the introduction drum 38.

As shown in FIG. 6, the other end 30b of the linear material 30 is turned back to the one end 30a via a pulling pulley 39 provided on the other end 30b. Has been
Further, at a position immediately above the pair of second pulleys 37, the support member
Bearing plate 40, which is formed to protrude upward from 34, rotating shaft 41
, Are sequentially engaged with each of the third pulleys 42 rotatably mounted and disposed, and then extended to the tension introducing drum 38 and connected to the tension introducing drum 38.

The tension introducing drum 38 is driven to rotate by a motor (not shown) capable of rotating forward and backward, and the motor can be remotely operated from a ground position. Also,
In FIG. 6, the suspension cable 10 is omitted for convenience of illustration.

In this embodiment, as shown in FIG. 6, both ends of the filament 30 are simultaneously wound in the direction of the arrow by the tension introducing drum 38 so that the first When each of the strut cables 11 is simultaneously pulled upward by a predetermined distance via 33, tension is applied to the suspension cable 10 and the holding cable 13, so that a predetermined tension is introduced to the membrane material 12 by the strut cable 11. Can be.

When the membrane material 12 is opened, the tension of each suspension cable 10 and the holding cable 13 is released, and the membrane material 12 is relaxed.
It is necessary to move the holding cable 13 together with the film material 12 in a predetermined direction.

In this case, when the motor of the tension introduction drum 38 is rotated in the reverse direction of the tension, the respective strut cables 11 move downward due to the weight of the film material 12, the holding cable 13, and the like.
The tension of the suspension cable 10 and the holding cable 13 is released, and the film material 12 can be relaxed.

When the film material 12 is changed from the open state to the closed state again, the film material 12
It is only necessary to apply tension again.

As described above, in the present embodiment, the operation of introducing the tension into the film material 12 can be performed efficiently in a short time, and can be remotely controlled from the ground position.

Therefore, it becomes particularly effective when the membrane structure has a large span, the number of suspension points, that is, the number of strut cables 11 increases, and the frictional resistance of each pulley increases.

In addition, except when the film material 12 is opened and closed, the tension introducing drum 38 is used.
Therefore, since the film material 12 is always tensioned via each strut cable 11, even if a creeping phenomenon or the like occurs over time in the film material 12, the tension state of the film material 12 does not relax. Therefore, the membrane material as in the conventional membrane structure
There is no need to re-tension 12 and maintenance and management will be reasonable and economical.

Next, FIG. 8 shows a second embodiment of the present invention. In this embodiment, one continuous wire member 30 is arranged along the suspension cable 10 and each strut cable
Of the 11, only the strut cable 11 </ b> A arranged at the center is set in advance to the length of the tensioned state after the introduction of tension to the membrane material 12, and the upper end of the strut cable 30 is not inserted through a pulley or the like. It is directly fixed at the center position. As for the other strut cables 11, the first pulleys 33 are respectively disposed at the upper ends in the same manner as in the first embodiment, and the suspension cables 10 are provided directly above the respective strut cables 11 via the support members 34. And a pair of second pulleys 37 fixed to each other.

The wire member 30 is sequentially extended from one of the second pulleys 37 so as to engage with the other second pulley 37 via the first pulley 33.

One end 30a of the filament 30 is connected to a tension introduction drum 38 disposed at a corresponding one end 10a of the suspension cable 10, and the other end of the filament 30 is 30b is turned back to the one end 30a side via a pulling pulley 39 provided on the other end 30b side, and
As in the embodiment, it extends to the tension introducing drum 38 via each third pulley 42 at a position immediately above each pair of second pulleys 37 and is connected to the tension introducing drum 38.

Other configurations are the same as those of the first embodiment, and the same components are denoted by the same reference numerals and description thereof will be omitted.

Thus, in the present embodiment, in addition to the same operation and effect as those of the first embodiment, when the wire member 30 is wound by the tension introducing drum 38, the strut cable 11A provided in the center portion is used as a reference. As a result, the strut cables 11 on both sides thereof are sequentially pulled up, so that it is possible to achieve the effect that the introduction of tension can be achieved more reliably in the left-right balance.

Note that the strut cable 11A to be fixed is not limited to the central portion, but may be any one.

Next, FIG. 9 shows a third embodiment of the present invention. In this embodiment, each strut cable 11 is set in advance to the length of the tensioned state after the tension is applied to the membrane 12. And each upper end is directly fixed to the linear member 30 at the position immediately above without passing through a pulley or the like.
Is connected to a tension introducing drum 38, and the other end 30b of the linear material 30 is connected to the one end through a pulling pulley 39 provided on the other end 30b side. End 30
It is folded back to the a side, and is extended to the tension introducing drum 38 via third pulleys 42 which are fixed to the suspension cable 10 at positions directly above the strut cables 11 and are respectively connected to the tension introducing drum 38 It is the configuration that was done. Other configurations are the same as those of the first embodiment, and the same components are denoted by the same reference numerals and description thereof will be omitted.

Thus, in the present embodiment, the same operation and effect as those of the first embodiment can be obtained. Further, in the present embodiment, the first pulley 33 and the second pulley 37 are not required as in the first embodiment. Therefore, the device can be simplified.

In each of the above embodiments, the provision of the third pulley 42 makes it possible to distribute the load during lifting between the second pulley 37 and the third pulley 42, which is structurally reasonable. Some third pulleys 42 may be omitted,
The folded wire member 30 may be linearly extended to the tension introducing drum 38.

Further, as the wire member 30, a steel cable material is preferable in terms of strength, but other appropriate materials can be used depending on design conditions.

Further, the wire member 30 may be provided with a tension device at both ends as in the above-described embodiment, and only one end may be operated by the tension device.

In the above embodiment, the suspension cables 10 are arranged in parallel to each other. However, the suspension cables 10 may be connected to each other as in the embodiment shown in FIGS. 14 and 15. In this case, it is also possible to arrange the holding cables 13 at intermediate positions between the suspension cables 10 in such a way that
It may be arranged in the same direction as.

As the tensioning device, other than the tension introducing drum 38 shown in each of the above embodiments, an appropriate tensioning device that can exert the same operation and effect can be used. Also, a beam material having a predetermined rigidity can be used.

Furthermore, the present invention is not limited to the above-described embodiment, and the material of the filament material 30, the interval and span between the suspension cables 10, the number of strut cables, and the like can be appropriately changed according to design conditions. It goes without saying that various modifications can be made without departing from the spirit of the present invention.

(Effects of the Invention) The present invention is configured as described above, and the invention described in claim 1 can provide the following effects.

(1) A single continuous filament material is provided along the suspension material, and a first pulley is provided at an upper end of each lifting material, and the suspension material is provided immediately above each lifting material. A pair of second pulleys fixed to each other are arranged, and the filament material is sequentially extended from one of the second pulleys to engage with the other second pulley via the first pulley. Connecting one end of the filament to a tensioning device disposed at a corresponding one end of the suspension material, and connecting the other end of the filament to the other end. Folds back to the one end via pulling pulleys provided on the side, and sequentially engages with the third pulleys fixed to the suspension material at positions immediately above the pair of second pulleys and arranged respectively. And then connected to the tensioning device by extension. By taking up the material, each of the lifting materials is simultaneously pulled upward by a predetermined distance, and a predetermined tension is introduced into the film material, so that the operation of introducing tension to the film material can be performed in a short time. It can be performed well, and is particularly suitable for a large-span membrane structure in which the number of hanging points of the membrane material increases.

(2) Further, even when a creep phenomenon or the like occurs in the film material, it is not necessary to re-tension the film material, which makes the maintenance management rational and economical.

According to the second aspect of the invention, the following effect can be obtained in addition to the effect of the first aspect of the invention.

(3) Of the respective lifting members, only one of the lifting members disposed at the center of one of the lifting members is set in advance to the length of the tension state after the tension is applied to the film material, and the upper end is the linear material. In this configuration, the tension can be introduced in a more balanced manner on the left and right sides of the central lifting member.

According to the third aspect of the invention, the following effect can be obtained in addition to the effect of the second aspect of the invention.

(4) By providing the third pulley, the load at the time of lifting can be distributed and loaded between the second pulley and the third pulley, which is structurally reasonable.

According to the invention described in claim 4 and the invention described in claim 5, the following effect can be obtained in addition to the effect of the invention described in claim 1.

(5) One continuous linear material is arranged along the suspension material, and each lifting material is set in advance to the length of the tension state after the tension is applied to the film material, and each upper end is positioned directly above. The apparatus can be simplified by adopting a configuration in which the apparatus is directly fixed to the above-mentioned filament material without using a pulley or the like.

[Brief description of the drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is a perspective view of a main part showing a film structure according to this embodiment. FIG. 2 is a plan view showing a schematic structure of the film structure. FIG. 3, FIG. 3 is a side view of FIG. 2, FIG. 4 is a cross-sectional view taken along the line AA, FIG. 5 is an end view showing a planar configuration of the film material, and FIG. FIG. 7 is a conceptual diagram showing an example of the device, FIG. 7 is a conceptual diagram showing a main part of the tension introducing device, and FIGS. 8 and 9 are tension introducing devices according to the second and third embodiments of the present invention, respectively. FIG. 10 and FIG. 11 are conceptual diagrams showing other embodiments of the film structure. 10 ... suspension material (suspension cable), 11 ... lifting material (strut cable), 12 ... membrane material, 13 ... presser cable. 16 ... pillar, 30 ... wire, 33 ... first pulley, 34 ... support member, 37 ... second pulley, 38 ... tensioning device (tension introduction drum), 39 ... double pulley , 42 ... The third pulley.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Makoto Saito 3- 10-1 Iwamotocho, Chiyoda-ku, Tokyo Inside Mitsui Construction Co., Ltd. (72) Kenzo Shinkubo 3- 10-1 Iwamotocho, Chiyoda-ku, Tokyo No. Mitsui Construction Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E04H 15/34

Claims (5)

(57) [Claims] 1. A suspension member arranged substantially in parallel or substantially radially, a film member suspended from a plurality of positions of each suspension member by a lifting member, and a suspension member at an intermediate position between the suspension members. In an opening / closing type membrane structure provided with a suspension cable in the same direction as the suspension material and a pressing cable for applying a tension to the film material, a single linear material continuous along the suspension material is formed. A first pulley is disposed at an upper end of each of the lifting members, and a pair of second pulleys each fixed to the suspension member are disposed immediately above each of the lifting members. A material is sequentially extended from one of the second pulleys to engage with the other second pulley via the first pulley, and one end of the linear material is connected to the suspension material. Corresponding one end of The other end of the wire is connected to the one end via a pulling pulley provided on the other end, and the other end of the wire is turned back to the one end. Immediately above the pair of second pulleys, the suspension is fixed to the suspension member, and sequentially engages with the third pulleys provided respectively, and then extends to and connects to the tensioning device. A tension introducing method for an openable / closable membrane structure, wherein each of the lifting members is simultaneously lifted upward by a predetermined distance by winding the member, thereby introducing a predetermined tension to the film member. 2. A suspension member arranged substantially in parallel or substantially radially, a film member suspended downward from a plurality of portions of each suspension member by a lifting member, and a suspension member at an intermediate position between the suspension members. In an opening / closing type membrane structure provided with a suspension cable in the same direction as the suspension material and a pressing cable for applying a tension to the film material, a single linear material continuous along the suspension material is formed. Arranged, only one of the lifting members is set in advance to the length of the tensioned state after the introduction of tension to the film material, and the upper end is fixed to the center position of the filament material. In each of the other lifting members, a first pulley is disposed at the upper end, and a pair of second pulleys each fixed to the suspension member are disposed immediately above each lifting member. The strip is the second pulley One end of the linear member is connected to the corresponding one end of the suspension member by sequentially extending from one side through the first pulley and engaging with the other second pulley. The other end of the wire is connected to the one end via a pulling pulley provided on the other end, and the other end of the wire is turned back to the one end. By extending and connecting to the tensioning device, by simultaneously winding both ends of the linear material by the tensioning device, each of the lifting materials is simultaneously pulled upward by a predetermined distance,
A tension introduction method for an openable / closable membrane structure, wherein a predetermined tension is introduced into the film material. 3. A suspension member disposed substantially in parallel or substantially radially, a film member suspended downward from a plurality of portions of each suspension member by a lifting member, and a suspension member at an intermediate position between the suspension members. In an opening / closing type membrane structure provided with a suspension cable in the same direction as the suspension material and a pressing cable for applying a tension to the film material, a single linear material continuous along the suspension material is formed. Arranged, only one of the lifting members is set in advance to the length of the tensioned state after the introduction of tension to the film material, and the upper end is fixed to the center position of the filament material. In each of the other lifting members, a first pulley is disposed at the upper end, and a pair of second pulleys each fixed to the suspension member are disposed immediately above each lifting member. The strip is the second pulley One end of the linear member is connected to the corresponding one end of the suspension member by sequentially extending from one side through the first pulley and engaging with the other second pulley. The other end of the wire is connected to the one end via a pulling pulley provided on the other end, and the other end of the wire is turned back to the one end. Immediately above the pair of second pulleys, the suspension is fixed to the suspension member, and sequentially engages with the third pulleys provided respectively, and then extends to and connects to the tensioning device. The tension introduction in the openable / closable membrane structure, wherein each of the lifting members is simultaneously pulled up by a predetermined distance by simultaneously winding both ends of the material, and a predetermined tension is introduced into the membrane material. Method. 4. A suspension member arranged substantially in parallel or substantially radially, a film member suspended downward from a plurality of portions of each suspension member by a lifting member, and a suspension member at an intermediate position between the suspension members. In an openable / closable membrane structure provided with a suspension cable arranged in the same direction as the suspension material on the membrane material and applying a tension to the membrane material, a single linear material connected along the suspension material is provided. The lifting members are arranged in advance, and each of the lifting members is set in advance to a length of the tensioned state after the introduction of the tension to the membrane material, and each upper end is fixed to the linear member at a position immediately above the linear member. Is connected to a tensioning device provided at a corresponding one end of the suspension material, and the other end of the linear material is provided on the other end side. Fold to the one end side via a pulling pulley Then, the tension members are extended and connected to each other, and both ends of the linear material are simultaneously wound by the tension device, whereby the lifting members are simultaneously lifted up by a predetermined distance, respectively, and are fixed to the film material by a predetermined amount. A tension introduction method for an openable / closable membrane structure, characterized in that tension is introduced. 5. A suspension member disposed substantially in parallel or substantially radially, a film member suspended downward from a plurality of portions of each suspension member by a lifting member, and a suspension member disposed at an intermediate position between the suspension members. In an opening / closing type membrane structure provided with a suspension cable in the same direction as the suspension material and a pressing cable for applying a tension to the film material, a single linear material continuous along the suspension material is formed. The lifting members are arranged in advance, and each of the lifting members is set in advance to a length of the tensioned state after the introduction of the tension to the membrane material, and each upper end is fixed to the linear member at a position immediately above the linear member. Is connected to a tensioning device provided at a corresponding one end of the suspension material, and the other end of the linear material is provided on the other end side. Fold to the one end side via a pulling pulley At a position directly above each of the lifting members, the third pulleys are fixed to the suspension member and sequentially engaged with each other, and then extended to and connected to the tensioning device. The tension in the openable / closable membrane structure, wherein the lifting members are simultaneously pulled up by a predetermined distance by winding both ends of the strip material at the same time, and a predetermined tension is introduced into the film material. Introduction method.