JPH11293964A - Supporting construction for membrane member anchorage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit easy re-introduction of tension and fine adjustment of the introduced tension by fixing an actuator main body from the opposite side of the membrane member to a framework constituting a membrane structure, a ram expanding relative to the actuator main body being penetrated through the framework, and coupling the ram to anchoring devices anchored to the end portion of the membrane member. SOLUTION: An anchoring device 4 for anchoring a membrane member 1 together with steel members 5, 5 for claming the end portion of the membrane member 1 from both the surfaces is supported to a freely adjustable state by an actuator main body 30 fixed to a framework 2 constituting the membrane structure. Here, with respect to the framework 2, a ram 31 which expands or shrinks relative to the actuator main body 30 fixed to the framework 2 toward the tension introducing direction from the opposite side of the membrane member 1 to the membrane member 1 penetrates through the framework 2 and is coupled to the anchoring device 4, and a load generated from the actuator main body 30 is transmitted from the ram 31 to the anchoring device 4. Tension of the membrane member 1 is taken by the framework 2 and is adjusted by adjusting the distance between the framework 2 and the anchor device 4, that is, a projected length of the ram 31 from the actuator main body 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support structure for a film material fixing section in which a fixing section of a film material is supported by a skeleton so that the tension of the film material of the film structure can be adjusted.

[0002]

2. Description of the Related Art A membrane structure is a structure in which a proper tension is applied to a film material to maintain a stable shape. The shape cannot be maintained against external forces such as.

[0003] In a state where tension is given to the membrane material, as shown in Fig. 7, the periphery is joined to the frame while being sandwiched between steel materials such as plates and flat bars from both sides. When the periphery of the material used for the material, such as glass fiber woven fabric coated with a polytetrafluoroethylene resin, is fixed while tension is applied, a phenomenon (relaxation) occurs in which the tension decreases with time due to creep, Since the ability to maintain the shape is lost, it is necessary to periodically check that there is a constant tension, and to re-introduce the tension if the tension is significantly reduced.

As shown in FIG. 8, when re-introducing tension into the film material, when fixing the periphery of the film material to the fixing device, the fixing device is inserted with an intervening member such as a plate between the fixing device and the frame. It is joined to the frame with bolts, and when the tension is reduced, the inclusions are removed and the bolts and nuts are tightened again, but the amount of movement of the fixing tool when re-introducing the tension is Since the thickness is equal to the thickness, the magnitude of the tension that can be introduced is determined, so that the tension cannot be finely adjusted.

[0005] Fine adjustment of the tension can be performed by adjusting the amount of tightening of the bolt to the nut, but the relationship between the amount of tightening of the bolt and the magnitude of the introduced tension is not clear. Is performed by trial and error, and rework tends to occur, so that it cannot be said that this is a method that can effectively introduce appropriate tension.

In this case, unless the relationship between the amount of bolt tightening and the magnitude of the introduced tension is known in advance, it is not known how much the tension is at the end of the bolt tightening. The work of confirming by another method is needed separately.

The present invention proposes a supporting structure for a film material fixing section in which the tension can be easily re-introduced and the introduced tension can be finely adjusted.

[0008]

According to the first aspect of the present invention, an actuator body is fixed to a skeleton, and a ram that expands and contracts with respect to the actuator body is connected to a fixing device that fixes an end of a membrane material. The distance between the skeleton and the skeleton can be adjusted to facilitate the re-introduction of the tension to the membrane material and the fine adjustment of the tension.

The actuator body is fixed to the framework from the side opposite to the membrane material across the framework, and the ram penetrates the framework and is connected to the anchor. The tension is re-introduced into the film material by the actuator body contracting the ram while applying a reaction force to the skeleton, and pulling the fixing tool toward the skeleton side. The tension is finely adjusted within the range in which the ram expands and contracts. When the ram is extended, the tension relaxes.

The magnitude of the re-introduced tension is determined by the length of the ram protruding from the actuator body or the amount of expansion and contraction. In particular, as described in claim 2, a load meter is built in or connected to the actuator. By doing so, even when the relationship between the amount of expansion and contraction of the ram and the introduced tension is not known in advance, re-introduction, fine adjustment, and relaxation of the tension can be performed while checking the magnitude of the tension.

In this case, tension can be introduced into the film material while monitoring the load on the actuator body by the load meter, so that rework can be prevented and maintenance can be easily performed. Further, since the tension can be checked at any time, the tension can be set to the most appropriate magnitude for the external force.

According to a third aspect of the present invention, a biasing member for directly or indirectly biasing the membrane material toward the skeleton is disposed between the fixing device fixing the end portion of the membrane material and the skeleton. The restoring force of the member makes it possible to adjust the distance between the fixing tool and the skeleton, facilitating the re-introduction of the tension to the membrane material and the fine adjustment of the tension.

In this case, the tension is re-introduced to the film material by locking the urging member or moving the connected fixing tool in the direction of the restoring force of the urging member with respect to the frame. The restoring force of the biasing member is determined from the spring constant and the amount of expansion and contraction of the biasing member, that is, the amount of movement of the fixing device, and the magnitude of the tension introduced into the film material is determined.

When the urging member is used in a state in which a compressive force is applied, the fixing device penetrates the skeleton and straddles to the opposite side of the membrane material with respect to the skeleton as described in claim 4, so that the fixing device can be used. ,
The urging member is arranged under a compressive force between a portion located on the opposite side of the membrane material and the skeleton. When the urging member is used in a state where a tensile force is applied, the receiving member is connected to the membrane member side of the skeleton as described in claim 7, and is connected between the receiving member and the fixing tool or to the receiving member. The urging member is disposed between the connecting member and the fixing tool under tension.

When the urging member is used in a state of receiving a compressive force, one end of the urging member is engaged with the skeleton, and the other end of the urging member is formed of the film material of the fixing device. It is locked by a locked member connected to the part located on the opposite side. The locked member is movably connected to the fixing device in a direction in which the fixing device and the frame are opposed to each other, and the movement of the locked member with respect to the fixing device adjusts the compressive force of the urging member, and the tension on the film material. Is re-introduced, fine-tuned, and relaxed.

The movement of the locked member with respect to the fixing device is achieved by, for example, cutting a screw on a portion of the fixing device opposite to the film material and covering the screw portion with the screw. This is enabled by screwing a nut that is locked to the locking member, and the tension of the film material is adjusted by moving the locked member in the direction in which the compressive force acts with the rotation of the nut.

In this case, since the tension is adjusted in accordance with the amount by which the nut moves in the axial direction of the screw portion with the rotation, fine adjustment can be easily performed, and the magnitude of the tension depends on the spring constant of the biasing member. It is grasped from the moving amount of the nut.

When the urging member is used in a state of receiving a tensile force, one end of the urging member is connected to the fixing device, and the other end is connected to the receiving member or the connecting member. Connected. Alternatively, as described in claim 10, one end of the urging member is connected to the fixing member, and the other end is connected to the connecting member.

In the eighth aspect, the receiving member is connected to the framework so as to be movable in a direction in which the fixing device and the framework are opposed to each other.
Re-introduction and fine-tuning of the tension to the membrane material by the movement of the receiving member with respect to the framework, and relaxation are performed. In claim 10, the connecting member is movably connected to the receiving member, and The movement reintroduces the tension to the film material, fine-tunes it, and relaxes it.

The movement of the receiving member with respect to the skeleton according to claim 8 is performed, for example, by cutting a screw at a connecting portion of the receiving member with the skeleton, and attaching a nut to be locked to the skeleton at the threaded portion. It becomes possible by screwing, and the movement of the connecting member with respect to the receiving member according to claim 10 is performed by cutting a screw at a connecting portion of the receiving member with the connecting member as described in claim 11, and connecting to a screw portion thereof. This is made possible by screwing a nut engaged with the member.

In any case, the tension is adjusted in accordance with the axial movement amount due to the rotation of the nut, so that fine adjustment is easy, and the magnitude of the tension is determined from the spring constant of the urging member and the movement amount of the nut. Is grasped.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the invention according to claim 1 is such that the tension of a membrane material 1 can be freely adjusted by an actuator body 30 fixed to a frame 2 supporting an end of the membrane material 1.
Is a structure in which a fixing tool 4 fixing the end of the frame 2 is supported by the skeleton 2.

The fixing device 4 fixes the film material 1 together with the steel materials 5 and 5 by the bolts 6 penetrating the steel materials 5 and 5 sandwiching the ends of the film material 1 from both sides. In the drawing, an angle iron is used for the fixing tool 4 so that the ram 31 protruding from the actuator body 30 is connected to the steel material 5 while being joined to the steel material 5. However, the sectional shape of the fixing tool 4 is not limited.

The actuator body 30 is fixed to the skeleton 2 from the side opposite to the membrane 1 with respect to the skeleton 2 in the direction of tension introduction to the membrane 1, and the ram 31 that extends and contracts with respect to the actuator body 30 penetrates the skeleton 2. As a result, the load generated by the actuator body 30 is transmitted from the ram 31 to the fixing device 4.
Is transmitted to As shown in FIG. 2, the actuator main body 30 is installed at an appropriate interval in the length direction of the skeleton 2 so that tension can be uniformly applied to the film material 1.

The tension of the membrane material 1 is adjusted by adjusting the distance between the framework 2 and the fixing tool 4, that is, the length of the ram 31 projecting from the actuator body 30 while applying a reaction force to the framework 2. The tension is re-introduced by contracting the ram 31 and relaxed by extending it.

The tension introduced from the actuator main body 30 to the film material 1 is confirmed by a load meter built in or connected to the actuator main body 30 and measuring the load generated by the actuator main body 30. Frame 2
Confirmed by a membrane tensiometer installed between them.

When a load meter is built in or connected to the actuator body 30, the load meter is monitored as needed.
By adjusting the load by operating the actuator body 30 when the tension is not appropriate, the tension of the film material 1 is continuously controlled during use of the film structure, and the proper tension is always introduced into the film material 1. State can be maintained. When a film tensiometer is used, the tension of the film material 1 is measured, and the load of the actuator body 30 is adjusted while checking the tension.
Can be properly maintained.

The membrane material 1 has a large tension when a large external force is applied such as in a strong wind or snowfall, and the higher the rigidity of the membrane material 1, the more the stability is secured. If the continuation is for a long time, relaxation is promoted. Therefore, in order to extend the life of the film material 1, it is necessary to adjust the tension by controlling the load of the actuator body 30 according to the situation.

FIG. 3 shows an example in which the load on the actuator body 30 is controlled in accordance with the degree of wind force or snowfall. In this case, in addition to the load meter attached to the actuator body 30 and the film tension meter installed on the fixing device 4, an external force measuring device such as an anemometer or a snowfall measuring device is installed on the membrane structure. The device is connected online to a control computer that controls the actuator body 30.

Information from the load cell and the external force measuring device is collected in the control computer, and the control computer calculates and calculates the optimum amount of tension to be applied to the membrane material 1 in comparison with the external force from the information. A command to generate a load corresponding to the optimum tension is transmitted to the actuator body 30. By performing this control continuously, it is possible to perform an automatic adjustment to increase the tension of the film material 1 when the external force increases, and to relax the film material 1 in normal times when the external force is not large. Since the relaxation of the film material 1 is suppressed, the performance of the film material 1 can be favorably maintained for a long time.

Further, by inputting information such as a weather forecast to the control computer, a tension corresponding to an expected magnitude of the external force is applied to the membrane material 1 in advance, and the normal state is prepared in advance for the arrival of the external force. Adjustments can be made.

As shown in FIGS. 4 and 6, the third aspect of the present invention is a biasing member which is disposed directly or indirectly between the fixing device 4 and the frame 2 and biases the membrane 1 toward the frame 2. 7, the fixing device 4 is supported by the skeleton 2 so that the tension of the film material 1 can be adjusted freely. The urging member 7 includes a steel spring such as a coil spring, a plate spring, and a disc spring as illustrated,
An air spring and a hydraulic spring are used.

FIG. 4 shows that the fixing device 4 penetrates the skeleton 2 and
5 shows a case where the urging member 7 is arranged in a state where a compressive force is applied between the portion of the fixing device 4 located on the opposite side of the film material 1 and the frame 2 over the side opposite to the film material 1.

In this case, the fixing device 4 has a plate-shaped portion joined to the steel material 5 and a rod-shaped portion which penetrates the skeleton 2 and serves as a shaft of the urging member 7.

The urging member 7 urges the fixing device 4 toward the opposite side of the membrane 1 with respect to the skeleton 2 by a restoring force when compressed, and applies a tension corresponding to the force to the membrane 1. Since the restoring force is the product of the spring constant of the urging member 7 and the amount of contraction or extension, the tension introduced into the film material 1 is determined based on the amount of contraction of the urging member 7 from its natural length.

A locked member 8 is connected to a rod-shaped portion of the fixing device 4 located on the opposite side of the film material 1, and the urging member 7 is compressed in a direction in which the locked member 8 and the frame 2 are opposed to each other. In the state
The locked member 8 and the frame 2 are locked.

The re-tension introduction and fine adjustment to the film material 1 or the relaxation of the tension can be performed by making the locked member 8 freely movable in the axial direction of the urging member 7 with respect to the fixing device 4 and fixing the member 8 at an arbitrary position. In addition to this, when the locked member 8 is fixed to the fixing device 4, the plate is detachably sandwiched between the end of the urging member 7 and the locked member 8 or between the frames 2. Or by removing it. In any case, the urging member 7
The re-tension is introduced by increasing the amount of contraction, and the relaxation is performed by decreasing the amount of contraction.

FIG. 5 shows a fixing member 4 in which a locked member 8 is movably arranged on a rod-shaped portion located on the opposite side of the film material 1 and a screw is cut into the rod-shaped portion to be locked on the threaded portion. Member 8
This shows a case where the locked member 8 can be fixed to the fixing device 4 at an arbitrary position by screwing a nut 9 to be locked to the fixing member 4.

In the case of FIG. 5, the restoring force of the urging member 7 is equal to that of the frame 2.
, The nut 9 is positioned on the outer side with respect to the skeleton 2 and the locked member 8 is under pressure.
Moves relative to the skeleton 2, and the locked member 8 moves relative to the fixing device 4 together with the nut 9, and at the same time, the urging member 7
Is adjusted. For example, if the outer nut 9 is rotated clockwise while the inner nut 9 is loosened, the fixing tool 4 attempts to move to the opposite side of the film material 1 and the nut 9 and the locked member 8 are relatively moved. Approaches the skeleton 2, the urging member 7 contracts, and the tension is re-introduced to the membrane material 1.

In this case, since the amount of contraction of the urging member 7 is adjusted by the rotation of the nut 9, fine adjustment of the tension can be easily performed.

FIG. 6 shows a case where a receiving member 10 is connected to the frame 2 from the side of the membrane material 1 and the urging member 7 is arranged in a state where a tensile force is applied between the receiving member 10 and the fixing device 4. In this case, since the urging member 7 is connected to the fixing device 4, the fixing device 4 has a shape that can be connected to the urging member 7 while being joined to the steel material 5.

The urging member 7 urges the fixing device 4 toward the skeleton 2 by the restoring force when receiving the tensile force, and applies a tension corresponding to the restoring force to the film material 1. The tension is grasped by the product of the spring constant of the urging member 7 and the extension from the natural length.
One end of the urging member 7 is connected to the fixing device 4, and the other end is connected to the receiving member 10 or a connecting member 11 connected to the receiving member 10.

When the other end of the urging member 7 is directly connected to the receiving member 10 and when it is connected to the connecting member 11, re-tension introduction and fine adjustment to the film material 1 or relaxation of the tension is performed by the receiving member. Ten
Is movable in the axial direction of the urging member 7 with respect to the skeleton 2,
This can be performed by being able to be fixed to the frame 2 at an arbitrary position. When the other end of the urging member 7 is connected to the connecting member 11, the connecting member 11 is made movable with respect to the receiving member 10.
This can be achieved by being able to be fixed to the receiving member 10 at an arbitrary position. In any case, re-tension is introduced by increasing the amount of extension of the urging member 7, and relaxation is performed by decreasing the amount of extension.

In FIG. 6, a screw is cut at a connection portion of the receiving member 10 with the skeleton 2, so that the receiving member 10 is movable with respect to the skeleton 2. The receiving member 10 can be fixed at an arbitrary position by screwing a nut 9 that locks to the connecting member 11. However, in FIG.
The connection part with the connecting member 11 is threaded, and the connecting member 11
In some cases, the connecting member 11 can be fixed to the receiving member 10 at an arbitrary position by making the receiving member 10 movable with respect to the receiving member 10 and screwing the nut 9 into the screw portion.

In the case of FIG. 6, the restoring force of the urging member 7 acts on the receiving member 10 from the skeleton 2 to the membrane material 1 side.
Since the pressure is acting between the nut 9 and the nut 9, the receiving member 10 and the connecting member 11
, And at the same time, the amount of extension of the urging member 7 is adjusted. For example, if the nut 9 is rotated clockwise, the receiving member
10 and the connecting member 11 move away from the film material 1, and at the same time, the urging member 7 extends, and the tension is re-introduced into the film material 1.

Also in this case, similarly to the case of FIG.
The amount of extension of the urging member 7 is adjusted by the rotation of
Fine adjustment of tension can be easily performed.

When the urging member 7 is connected to the connecting member 11, the connecting member 11 is connected to the receiving member 10 in a state insulated from the rotation of the receiving member 10, and the receiving member 10 is connected to the frame 2.
The receiving member 10 can also be fixed to the skeleton 2 at an arbitrary position by cutting a screw at a connection portion with the skeleton 2 and cutting a female screw into a hole of the skeleton 2 through which the receiving member 10 is inserted. In this case, fine adjustment of the tension of the membrane material 1 is performed by directly rotating the receiving member 10 and adjusting the screwing length of the receiving member 10 to the skeleton 2.

Although not shown, when the urging member 7 is directly connected to the receiving member 10, the urging member 7 is connected to the receiving member 10 in a state insulated from rotation of the receiving member 10. The receiving member 10 can be fixed to the skeleton 2 at an arbitrary position by forming a female screw in the skeleton 2 in advance.

[0049]

According to the first and second aspects of the present invention, there is provided a fixing device for fixing an actuator body to a frame and fixing an end portion of a film material.
By connecting the ram that expands and contracts to the actuator body, the distance between the fixing tool and the skeleton can be adjusted, so that re-introduction, fine adjustment, and relaxation of the tension to the membrane material can be easily performed.

Further, the magnitude of the tension introduced by the length of the ram protruding from the actuator body and the amount of expansion / contraction can be ascertained.

In particular, since the load meter is built in or connected to the actuator, even when the relationship between the amount of expansion and contraction of the ram and the introduced tension is not known in advance, the tension is checked again while checking the magnitude of the tension. Introduce and fine-tune.

In this case, tension can be introduced into the film material while monitoring the load on the actuator body with the load meter, so that rework can be prevented and maintenance is facilitated. Further, since the tension can be checked at any time, the tension can be set to the most appropriate magnitude for the external force.

According to a third aspect of the present invention, an urging member for directly or indirectly urging the membrane material toward the skeleton is disposed between the fixing device fixing the end of the membrane material and the skeleton. Since the distance between the fixing tool and the skeleton can be adjusted by the restoring force of the urging member, re-introduction, fine adjustment, and relaxation of the tension to the film material can be easily performed.

Further, the magnitude of the tension introduced into the film material can be determined from the spring constant of the urging member and the amount of movement of the fixing device.

In particular, when the urging member is used in a compressed state, the amount of contraction of the urging member can be adjusted by rotation of a nut screwed into a screw portion formed on the fixing device. Fine adjustment can be easily performed.

According to the eleventh aspect, when the urging member is used in a tensioned state, the amount of extension of the urging member can be adjusted by the rotation of the nut screwed into the screw portion formed on the receiving member, so that the tension can be reduced. Adjustment can be easily performed.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view illustrating a film material fixing unit according to claim 1;
(b) is a side view of (a), and (c) is a plan view of (a).

FIG. 2 is a plan view showing a relationship between one film material and an installation position of an actuator body.

FIG. 3 is a flowchart showing a control example of an actuator body.

FIG. 4A is a cross-sectional view showing a film material fixing section according to claim 5;
(b) is a plan view of (a).

FIG. 5 is a sectional view showing a film material fixing section according to claim 6;

FIG. 6A is a sectional view showing a film material fixing unit according to claim 9;
(b) is a plan view of (a).

FIG. 7A is a cross-sectional view showing a conventional film material fixing unit, and FIG.
3 is a plan view of FIG.

8A is a cross-sectional view showing a conventional structure for re-introducing tension, and FIG. 8B is a plan view of FIG.

[Explanation of symbols]

1 ... membrane material, 2 ... skeleton, 30 ... actuator body,
31 ... ram, 4 ... fixer, 5 ... steel, 6 ... bolt, 7 ... biasing member, 8 ... locked member, 9 ... nut, 10 ... receiving member, 11 ... Connecting member.

Claims (11)

[Claims] 1. A supporting structure in which a skeleton constituting a membrane structure supports a fixing portion of the membrane material in a state where tension applied to the membrane material can be freely adjusted. The support structure of the film material fixing portion, in which the actuator body is fixed, and the ram that expands and contracts with respect to the actuator body penetrates the skeleton and is connected to the fixing device that fixes the end of the film material. 2. The support structure for a film material fixing section according to claim 1, wherein a load meter is built in or connected to the actuator. 3. A support structure in which a fixing portion of a film material is supported on a skeleton constituting the film structure in a state where tension applied to the film material can be adjusted, and an end of the film material is fixed. A support structure for a film material fixing portion, in which an urging member for directly or indirectly urging the film material toward the frame is disposed between the fixing device and the frame. 4. The fixing device penetrates the skeleton and straddles the opposite side of the membrane with respect to the skeleton, and is biased under a compressive force between the portion of the fixing device located on the opposite side of the membrane and the skeleton. 4. The support structure for a film material fixing unit according to claim 3, wherein a member is disposed. 5. One end of the biasing member is locked to the skeleton, and the other end is locked to a locked member connected to a portion of the fixing device opposite to the membrane material, and 5. The support structure for a film material fixing section according to claim 4, wherein the fixing member is movable with respect to the fixing device in a direction in which the fixing device and the frame face each other. 6. A fixing tool is threaded at a portion located on the opposite side of the film material, and a nut engaged with a locked member is screwed into the threaded portion, and the locked member is a nut. 6. The supporting structure for a film material fixing unit according to claim 5, wherein the supporting structure is movable with respect to the fixing device with rotation. 7. A receiving member is connected to the membrane member side of the skeleton, and the urging member is subjected to a tensile force between the receiving member and the fixing device or between the connecting member connected to the receiving member and the fixing device. The support structure for a film material fixing section according to claim 3, which is disposed. 8. An urging member has one end connected to a fixing device and the other end connected to a receiving member or a connecting member, and the receiving member is movable in a direction in which the fixing device and the frame face the frame. A support structure for a film material fixing section according to claim 7. 9. The receiving member is threaded at a connection portion with the frame, and a nut engaged with the frame is screwed into the threaded portion, and the receiving member is movable with respect to the frame as the nut rotates. The support structure for a film material fixing section according to claim 8. 10. The urging member has one end connected to the fixing device and the other end connected to the connecting member, and the connecting member is movable in a direction in which the fixing device and the frame face the receiving member. Support structure of the film material fixing part. 11. The receiving member is threaded at a connection portion with the connecting member, and a nut engaged with the connecting member is screwed into the threaded portion, and the connecting member is rotated with respect to the receiving member with rotation of the nut. 11. The support structure for a film material fixing unit according to claim 10, which is movable.