JPH0643767B2 - Tension membrane structure and its construction method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tension membrane structure that facilitates introduction of tension to a roof membrane and a method for constructing the tension membrane structure.

(Prior Art) In a conventional tension (suspension) membrane structure, the tension is generally introduced into the membrane body by pulling the entire membrane mechanically or by human means around the membrane.

(Problems to be Solved by the Invention) However, according to the conventional example, in a large-scale building, it is not easy to uniformly apply tension to the entire membrane,
Therefore, the accuracy is poor, the equipment for introducing the tension is large, and the introduction of the tension is troublesome. Further, even when the tension is re-introduced due to the secular change of the membrane, it is difficult to partially correct the tension, and it is difficult to re-introduce the tension.

An object of the present invention is to provide a tension membrane structure that can easily and safely uniformly introduce tension into the roof membrane, and can easily re-introduce tension, and a method for constructing the tension membrane structure.

(Means for Solving Problems) The tension membrane structure of the present invention comprises a plurality of frame constituent members, joints, suspension bolts, membrane supporting portions, nuts, and roof membranes. The joint supports the ends of the frame components. The suspension bolt is suspended from the joint. The membrane supporting portion is held by the suspension bolt so as to be vertically movable along the suspension bolt. The nut is attached to the suspension bolt, and the upper portion of the nut receives the membrane support portion in a positionally adjustable manner. One end of the roof membrane is attached to the membrane support.

According to the construction method of the present invention, the ends of a plurality of frame constituent members are connected to a joint to assemble a frame, and under the joint, a suspension bolt having a membrane supporting portion to which one end of a roof membrane is attached is lifted. , Temporarily stopping at a predetermined height, fixing the outer peripheral end of the roof membrane, and then lifting the hanging bolt again to lift the roof membrane,
After suspending the suspension bolt on the joint, the membrane supporting portion is pushed up to introduce tension into the roof membrane, and after the introduction, the membrane supporting portion is held in position on the suspension bolt via the nut.

(Operation) Tension is introduced into the roof membrane by pushing up the membrane support located at the suspension point of the stretched roof membrane below the frame.

(Examples) Examples of the present invention will be described below.

As shown in FIG. 6 to FIG. 8, the roof part of the building has a roof membrane 2 hung with a hanging bolt 3 by a frame in which the frame component 1 is assembled into a three-dimensional truss, and the roof membrane peripheral part is continuously bounded. This is a structure in which the tension film fixed by the beam 10 and this frame are combined. The upper surface of the roof membrane 2 is held by the holding cable 4. In addition, 4a is a brace.

As shown in FIGS. 1 and 2, a steel pipe is used as the frame component member 1, and eight intersections of the frame component member (8
The joint 5 is used in the drawing) to suspend the suspension bolt 3 from each joint.

The joint 5 is made of a steel ball, and the end 11 of each frame constituent member 1 is mechanically joined to the joint from a predetermined direction.

Here, for example, the joint 5 at the intersection A (FIG. 8)
Regarding the method of joining the frame and the frame component 1,
It will be described with reference to the drawings. The joint 5 is formed with a number corresponding to the number of frame constituent members 1 to be joined, in this example, five joining screw holes 51. For each joint screw hole,
The connecting screw rod 6 screwed to the end 11 of each frame component 1 is screwed in. And each connecting screw rod 6
A wapper 7 for rotating the connecting screw rod is attached at an intermediate position of the above, and a driving pin 72 is located in a long groove 71 provided in this wapper. By turning the wapper 7, the connecting screw rod 6 moves back and forth, and thereby the joint 5 and the end 11 of each frame component 1 are joined.

The hanging bolt 3 is composed of two members, an upper bolt 31 and a lower bolt 32, as shown in FIG.
Is equipped with. The upper end of the upper bolt 31 has a joint 5
Through, and protrudes upward, and the protruding end is fixed by a nut 34. A suspension ring 35 is attached to the lower end of the upper bolt 31 as shown in FIGS. 1 and 3, and the suspension ring is interconnected with a ring 36 attached to the upper end of the lower bolt 32. Both of these rings form a relief portion 33 for the hanging bolt. The lower ring 36 has a vertically elongated oval shape, and one of both long side portions thereof is a movable portion 361 which is a detachable portion. This movable portion is provided with a carabiner mechanism. The movable portion 361 is attached so as to be swingable around a pin 362, and the engaging portion 363 at the upper end of the movable portion is a spring force of a spring (not shown),
It is engaged with the locking portion 364. Engaging part 363 and locking part 3
The locked state with 64 is fixed with a nut 365. In order to remove the lower ring 36 from the upper ring 35, the nut 365 is moved downward and the engaging portion 3 of the movable portion 361 is moved.
After releasing the fixation between 63 and the locking portion 364, the movable portion is swung counterclockwise about the pin 362 against the spring force as shown by the chain line in FIG. After that, a space is provided between the engagement portion and the locking portion, and the upper ring 35 is pulled out from this space.

The lower ring 36 may be, for example, that of the fourth illustration. The main body of this is a pair of U-shaped ring parts 3
6a and 36b, one end of both ring parts is connected by a connecting pipe 36c, and the screw part 36 is provided at the other end.
a1 and 36b1 are connected by a screw sleeve 36d. In this example, in order to remove the lower ring 36 from the upper ring 35, the screw sleeve 36d is sent out upward to release the connection of the screw portions 36a1 and 36b1 at the other end, and then, for example, the upper ring portion 36a is removed first. As shown by the chain line in FIG. 4, the connecting pipe 36c is rotated around the center so that the other end is spaced.

Below the lower bolt 32, a membrane supporting portion 37 is held in position as shown in FIGS. In the membrane supporting portion 37, a supporting pipe 371 is erected at the center, and four supporting frames 372, ... Extend radially and horizontally from the supporting pipe at the lower end, and further, at the tip of the supporting frame. A ring-shaped mounting plate 373 is provided concentrically with the pipe. The support pipe 371 is loosely fitted to the lower bolt 32, and the lower end of the pipe is received by a disc-shaped support plate 374 movably attached to the lower bolt. The support plate 371 is a double plate having a position adjusting function. The position is held by the nut 375. Each support frame 372 is cantilevered by a support pipe 371, and is reinforced by a reinforcement frame 376. Further, one end of the roof membrane 2 is joined to the mounting plate 373 by the holding plate 8 and the bolt 8a. One end of the ridge cable 4b is attached to the attachment plate 373.

Therefore, the membrane support portion 37 is merely placed on the support plate 374, and is always held in a state of being movable upward along the lower bolt 32.

The outer side of the membrane support portion 37 is covered with a decorative cover 9 as shown in FIGS.

The attachment state of the end of the frame component member 1 to the boundary beam 10 will be described. As shown in FIGS. 12 and 13, a steel fulcrum sphere 13 is formed on the upper surface of the beam attached to the column 12.
Are mounted via a mounting plate 14, and the respective spheres are arranged at a predetermined interval so as to surround the outer periphery of the roof portion.
Each sphere 13 has a sphere 13 located at a corner.
Except for a (FIG. 14), the ends of the two frame constituent members 1 are joined obliquely from above. A screw pipe 41, which is a joint portion of the end portion of the presser cable 4, penetrates each sphere 13. As shown in FIG. 12, the screw pipe 41 has its right end portion connected to the end portion of the presser cable 4 by crimping, and its left end portion protruding outward from the spherical body 13 by the nut 15 attached to the protruding end. It is fixed on this sphere. The presser cable 4 applies downward tension to the roof membrane 2 to which upward tension is applied,
This is for ensuring a stable shape of the roof membrane.

The base plate 16 extends inward from the upper surface of the beam, and the roof membrane fixing plate 10a is provided on the base plate.
The end of the roof membrane 2 is mounted on this fixed plate by bolts. A rib plate 17 is attached below the fixed plate 10a, and the end of the ridge cable 4b is attached to this rib plate. The peak cable 4b is
The shape of the roof membrane is adjusted below the roof membrane 2 and the concentration of snow load is prevented.

Further, in FIG. 14, the end of the frame component member 1 is joined to the sphere 13a located at the corner of the outer peripheral portion of the roof portion.

Next, the construction method will be described.

The upper bolt 31 is previously removed from the lower bolt 32 of the hanging bolt 3, the upper bolt is attached to the joint 5, the membrane support portion 37 is attached to the lower bolt, and one end of the roof membrane 2 is attached to the attachment plate 373 of the membrane support portion. Presser plate 8 and bolt 8
Secure with a. First, the frame constituent member 1
After assembling the frame in a three-dimensional shape using the joint 5 at the node, the lower bolt 32 and the roof membrane are lifted by using the wire W and the winch as shown in FIG. Once stopped, attach the periphery of the other end of the roof membrane to the fixing plate 10a of the beam 10, and then
It is hoisted again, and the lower ring 36 is hooked on the hanging ring 35 of the upper bolt 31 suspended from each joint, as shown by the chain line, and then the presser cable 4 is attached on the roof membrane, and finally, the support. The frame 372 is pushed upward by the jack to raise the support portion 37 along the lower bolt 32, introduce tension into the roof membrane, and further tighten the nut 3
Finely adjust the tension by turning 75 while holding the support frame.
As a result, the roof membrane 2 maintains a stable shape by equalizing the upward tension and the downward tension of the pressing cable 4 as shown in FIG.

As described above, when the roof membrane 2 is stretched and the roof membrane is deformed by a strong wind, the membrane support portion 37 moves vertically or horizontally. The support pipe 3 of the support portion against the vertical movement
Only 71 moves up and down along the lower bolt 32 to absorb the deformation of the roof membrane. At this time, the entire suspension bolt 3 remains stationary, so that the frame member 1 is covered with the roof membrane 2.
The effect of the deformation of is not reached. In addition, the lower bolt 32 of the suspension bolt 3 is moved by the upper ring 35 with respect to the movement in the left-right direction.
It swings like a pendulum with respect to the center and absorbs the movement of the roof membrane 2. Therefore, also in this case, the relief portion 33 is also provided.
Therefore, the deformation of the roof membrane 2 is absorbed, and the deformation is not transmitted to the frame component 1 via the upper bolt 31.

If it is necessary to reintroduce the tension due to the aging of the membrane body, the support membrane 372 of the membrane support portion 37 of the hanging bolt 3 at the required location is pushed up from below by the jack, and the roof membrane is simultaneously formed. It is lifted and thus tension can be introduced into the roof membrane. After the introduction, the nut 375 positions the support frame.

It should be noted that the hanging bolt 3 does not always have to be provided with the relief portion as described above. In this case, in order to suspend the suspension bolt 3 on the joint 5, the upper end of the bolt is pierced through the joint 5 in a state of being suspended together with the roof membrane 2 and fixed by the nut 34. This method is also applied to the case where the suspension bolt has a relief portion formed of rings and both rings have a non-detachable structure.

Although the relief portion does not necessarily have to be composed of the rings 35 and 36, the use of the ring simplifies the construction of the relief portion and allows the relief portion to reliably absorb the deformation of the roof membrane. Furthermore, if the ring can be removed,
After the frame is assembled with the frame component 1, the hanging bolt 3 can be hung on this frame, which simplifies the construction and allows removal from below this frame, which simplifies the work.

The joint is not limited to the above example, and is a spherical body obtained by joining hollow hemispheres to each other like a joint 5a shown in FIGS. A mounting hole 51a for inserting the portion 11 may be provided. For joining with the frame component 1, the end of the frame component is inserted into the mounting hole and the end is fixed by welding.

(Effect of the invention) According to the present invention, since the membrane supporting portion is held by the hanging bolt so as to be vertically movable along the hanging bolt, after the frame is assembled by the frame constituent members and the hanging bolt is set, By pushing up below this frame, you can introduce tension to the roof membrane,
Tension introduction work can be done easily and safely, and even when tension needs to be re-introduced due to aging of the roof membrane, that work can be done easily, and fine adjustment of tension introduction is possible by operating the nut. is there. Since the vertical movement of the roof membrane can be absorbed by the hanging bolts, the movement does not reach the frame assembled by the frame constituent members, and the load can be reduced. Since tension can be introduced from below at the suspension point of the roof membrane, uniform tension can be easily introduced and accuracy can be improved as compared with the conventional example, and the equipment for introducing tension does not become large.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional front view of a main portion, FIG. 2 is a partial cross-sectional plan view showing a mounting state of a frame constituent member to a joint, and FIG. 3 is an enlarged side view of a relief portion. Fig. 4, Fig. 4 is an enlarged side view showing another example of the relief portion, Fig. 5 is a sectional view taken along line VV in Fig. 1, and Fig. 6 is a front view of a building to which a tension film structure is applied, Fig. 7 Is a left side view of FIG. 6, FIG. 8 is a plan view of FIG. 6, FIG. 9 is a front view showing one step of construction, and FIG. 10 is a front view showing another joint in use. 11 is a plan view of FIG. 10, FIG. 12 is a cross-sectional view taken along the line XII-XII of FIG. 13, FIG. 13 is a plan view showing a mounting state of an end portion of a frame constituent member, and FIG. It is a top view of a corner. DESCRIPTION OF SYMBOLS 1 ... Frame constituent member, 2 ... Roof membrane, 3 ... Hanging bolt, 37 ... Membrane support part, 371 ... Support pipe, 372 ... Support frame, 375 ... Nut, 5 ... Joint.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masao Warita 2-16-1, Kyobashi, Chuo-ku, Tokyo Inside Shimizu Construction Co., Ltd. (56) References

Claims (2)

[Claims] 1. A plurality of frame components, a joint, a suspension bolt, a membrane support portion, a nut and a roof membrane, the joint supporting the end portion of each frame component, the suspension. The bolt is suspended from the joint, the membrane support portion is held by the suspension bolt so as to be vertically movable along the suspension bolt, and the nut is attached to the suspension bolt. A tension membrane structure, wherein the upper portion thereof receives the membrane supporting portion in a positionally adjustable manner, and one end of the roof membrane is attached to the membrane supporting portion. 2. A frame is assembled by connecting end portions of a plurality of frame constituent members to a joint, and a hanging bolt having a membrane supporting portion to which one end portion of a roof membrane is attached is lifted under the joint, and the frame bolt is lifted to a predetermined position. After stopping once at the height of the roof membrane, and fixing the outer peripheral end of the roof membrane, the roof membrane is also lifted by lifting the hanging bolt again, and after hanging the hanging bolt on the joint, A method for constructing a tension membrane structure, which comprises pushing up to introduce tension into the roof membrane, and then holding the membrane support portion in position on the suspension bolt via a nut after the introduction.