JP2016070019A - Coupling device and net structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit looseness of a tensile material caused by an action of external force by using a simple mechanism.SOLUTION: A coupling device to which an end of a tensile material installed between support portions with initial tension applied is coupled includes: a guide member fixed to the support portion; a moving member to which the end of the tensile material can be coupled and which can move along the guide member; and an elastic member installed to have one end abutting on the guide member and the other end abutting on the moving member, compressed in a state where the moving member is pulled by the tensile material to abut on the guide member and thus the movement of the moving member is stopped, and energizing the moving member in a direction separating from the guide member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a connecting device for connecting an end portion of a tension member to a support portion such as a beam and constructing a tension member between the support portions, and a net structure including the connecting device.

  The cable net structure is widely used in facilities such as stadiums and exhibition halls as a large space frame format. The cable net structure is configured by arranging a plurality of upwardly convex holding cables and downwardly projecting hanging cables in an intersecting manner, and initial tension is introduced to each cable to stabilize the shape. Has been.

  When an upward load consisting of a blow-up wind load is applied to such a cable net structure, the tension of the suspension cable decreases.When a downward load consisting of a wind-down wind load or snow is applied, the tension of the holding cable is reduced. Although reduced, it is necessary to prevent these cables from loosening in order to maintain the shape of the cable net structure. For this reason, a large initial tension must be introduced into these cables.

  In Patent Document 1, the end of the cable is supported by a passive damper type fixing device fixed to the foundation beam, so that the tension of the suspended cable is maintained at a magnitude of 0 or more at the maximum upward load, and at the maximum downward load. A cable frame that keeps the tension of the holding cable at 0 or more is disclosed.

  However, the passive damper type fixing device disclosed in Patent Document 1 has a complicated mechanism and thus costs equipment. Particularly, in a large-scale cable net structure composed of many cables, many passive damper type fixing devices are required, so that a lot of equipment costs are required.

Japanese Patent Laid-Open No. 10-317731

  This invention considers the fact concerned, and makes it a subject to control loosening of the tension material which arises by the action of external force with a simple mechanism.

  The invention of the first aspect is a connecting device in which ends of tension members laid between support portions are connected in a state where initial tension is applied, and a guide member fixed to the support portions; A movable member that is connectable to the end and movable along the guide member, and has one end that contacts the guide member and the other end that contacts the movable member, and the movable member is pulled by the tension member and the guide And an elastic member that is compressed in a state in which the movement of the moving member is stopped upon contact with the member, and biases the moving member in a direction away from the guide member.

  In the first aspect of the invention, an external force (for example, an upward load consisting of a blowing wind load acting on a downwardly suspended suspension tension material or an upwardly convex presser member is applied to a tension member erected with initial tension applied. When a downward load consisting of a downwind load or a snow load acting on the tension material is applied, the tension of the tension material decreases and the amount of elongation of the tension material decreases (the tension material slightly extends). However, since the moving member is biased by the elastic member, the rigidity of the elastic member can be applied to the tension member. Therefore, it is possible to suppress the loosening of the tension material generated with respect to the external force with a simple mechanism using an elastic member. Further, the initial tension applied to the tension material can be reduced.

  According to a second aspect of the present invention, in the connecting device according to the first aspect, when the moving member is urged in a direction away from the guide member by the elastic member and moves a predetermined amount, the end of the tension member is moved to the guide member. A fixing means for fixing the portion;

  In the second aspect of the invention, when the moving member moves a predetermined amount in the direction away from the guide member, it is possible to apply compression rigidity to the tension member. Thereby, the bending amount of a tension material can be reduced.

  According to a third aspect of the present invention, in the net structure including the coupling device of the first or second aspect, the tension material intersects with the pressing tension material protruding upward and the pressing tension material. And a suspension tension material that is convex.

  In the third aspect of the invention, an upward load composed of a blowing wind load acts on the suspension tension material, or a downward load composed of a wind load or a snow load acts on the holding tension material, and the suspension tension material is suspended. After the tension of the tension material or holding tension material decreases and the extension amount of the suspension tension material or holding tension material decreases, one tension material (pressing tension material for upward load or downward load) Since only the rigidity of the suspension tension material) is almost effective, the rigidity of the entire net structure is reduced.

  As a result, the suspending tension material and the holding tension material bend greatly as the net structure as a whole becomes smaller. However, one tension material (the holding tension material for the upward load or the suspension tension for the downward load) Since the degree of contribution of the geometric rigidity of the material increases, the amount of bending of the suspension tension material and the holding tension material can be suppressed.

  In addition, since the contribution of geometric rigidity of one tension material (pressing tension material in the case of upward load or suspension tension material in the case of downward load) increases, one tension material (pressing tension material in the case of upward load, Alternatively, the initial tension introduced into the suspension tension material in the case of a downward load can be reduced.

  Since the present invention has the above-described configuration, it is possible to suppress loosening of the tension material caused by the action of an external force with a simple mechanism.

It is a perspective view which shows the cable net structure which concerns on embodiment of this invention. It is a perspective view which shows the holding | suppressing cable and suspension cable which were constructed | assembled which concern on embodiment of this invention. It is a sectional side view showing the connecting device concerning the embodiment of the present invention. It is a sectional side view showing each state of a connecting device concerning an embodiment of the present invention. It is a diagram which shows the value of tension | tensile_strength T which arises in the cable with respect to the displacement P of the cable end part which concerns on embodiment of this invention. It is a side view which shows the conventional connection apparatus. It is a perspective view which shows the holding | suppressing cable and suspension cable constructed using the conventional connection apparatus. It is a diagram which shows the value of the tension | tensile_strength T which arises in the pressing cable with respect to the extension amount L of the pressing cable in the pressing cable constructed using the conventional connection apparatus. It is a diagram which shows the value of the tension | tensile_strength T which arises in the suspension cable with respect to the extension amount L of the suspension cable in the suspension cable constructed | installed using the conventional connection apparatus. It is a sectional side view showing the variation of the connecting device concerning the embodiment of the present invention.

  Embodiments of the present invention will be described with reference to the drawings. First, a coupling device and a net structure according to an embodiment of the present invention will be described.

  As shown in the perspective view of FIG. 1, a cable net structure 10 as a net structure is composed of a cable as a tension material, a pressing cable 12 as a pressing tension material protruding upward, and a cable as a tension material. And a suspension cable 14 as a suspension tension material projecting downward. The holding cable 12 and the suspension cable 14 are made of steel wire.

  A plurality of the holding cables 12 and the suspension cables 14 are arranged so as to intersect each other and form a saddle-shaped curved surface. Further, initial tension is introduced to each holding cable 12 and each suspension cable 14 in order to stably maintain this saddle-shaped curved surface. The presser cable 12 and the suspension cable 14 are pressed against each other and are in contact with each other by this initial tension. That is, the holding cable 12 and the suspension cable 14 are provided so that force can be transmitted between the holding cable 12 and the suspension cable 14.

  As shown in the perspective view of FIG. 2 and the side cross-sectional view of FIG. 3, each showing one holding cable 12 and one hanging cable 14 out of the plurality of holding cables 12 and hanging cables 14 arranged in the cable net structure 10. Both ends of the holding cable 12 and the suspension cable 14 are connected to a support 18 provided on a frame such as a beam or a wall by a connecting device 16. Thus, the plurality of holding cables 12 and the suspension cables 14 are installed between the support portions 18 in a state where the initial tension is applied.

  Note that the holding cable 12 and the suspension cable 14 are connected at their ends to the support portion 18 by the connecting device 16 having the same configuration. Therefore, in order to make the explanation easy to understand, the holding cable 12 and the suspension cable 14 are connected in the following description. When collectively referred to, these cables are referred to as “cable 20”. In the following description, the direction in which the cable 20 pulls the rod 22 in the axial direction of the cable 20 is referred to as a tension direction 24, and the direction in which the cable 20 pushes the rod 22 (the direction opposite to the tension direction 24) is the compression direction 26. And

  As shown in FIG. 1 and FIG. 2, an exterior material (not shown) such as a film or glass forming a roof surface is attached to the upper surface or the lower surface of the cable net structure 10, and an upward load composed of a blowing wind load. An external force such as Wu, a downward load Wd composed of a downwind wind load or a snow load is received. That is, external force such as an upward load Wu consisting of a blowing wind load and a downward load Wd consisting of a blowing wind load or a snow load is applied to the holding cable 12 and the suspension cable 14.

  As shown in FIG. 3, the coupling device 16 includes a guide member 28, a moving member 30, and a coil spring 32 as an elastic member. The guide member 28 is a bottomed cylindrical member made of steel formed by integrating the bottom portion 34 and the cylindrical portion 36, and is attached to the support portion 18 by fixing the cylindrical portion 36 to the support portion 18.

  The moving member 30 is a bottomed cylindrical member made of steel formed by integrating the bottom portion 38 and the tubular portion 40. The cylindrical portion 40 of the moving member 30 is inserted into the cylindrical portion 36 of the guide member 28, and the moving member 30 is provided so as to be movable in the axial direction 42 of the guide member 28 along the guide member 28. That is, the moving member 30 is provided so as to be movable in the axial direction 42 with respect to the guide member 28.

  A through hole 44 is formed substantially at the center of the bottom 34 of the guide member 28, and a through hole 46 is formed substantially at the center of the bottom 38 of the moving member 30, and is pin-connected to the end of the cable 20 by a pin 48. The rod 22 is inserted into the through holes 44 and 46. Also, a nut 50 as a connecting means is fixed near the tip of the rod 22, and when the rod 22 is pulled by the cable 20, the nut 50 hits the outer surface of the bottom 38 of the moving member 30, The bottom 38 is connected. That is, the end of the cable 20 is provided so as to be connectable to the moving member 30.

  A protruding portion 52 is provided on the inner wall surface of the distal end portion of the cylindrical portion 36 of the guide member 28, and a protruding portion 54 is provided on the outer wall surface of the distal end portion of the cylindrical portion 40 of the moving member 30. . Thereby, when the moving member 30 moves in the direction away from the guide member 28 in the axial direction 42 and reaches the allowable moving amount, the protruding portion 54 hits the protruding portion 52 and stops the movement of the moving member 30. It is possible to prevent the guide member 28 from falling off.

  The coil spring 32 is provided between the bottom 34 of the guide member 28 and the bottom 38 of the moving member 30. The coil spring 32 is provided so that one end thereof contacts the inner surface of the bottom portion 34 of the guide member 28 and the other end contacts the inner surface of the bottom portion 38 of the moving member 30. One end of the coil spring 32 contacts the bottom portion 34 of the guide member 28 by welding or the like. The other end is not joined to the bottom portion 38 of the moving member 30. Therefore, in the state of FIG. 4A described later, there is a gap between one end of the coil spring 32 and the inner surface of the bottom 34 of the guide member 28, and the other end of the coil spring 32 and the inner surface of the bottom 38 of the moving member 30. Formed and non-contact.

  Then, as shown in FIG. 3, the moving member 30 is pulled by the cable 20 via the rod 22, and the moving member 30 moves in a direction approaching the guide member 28 in the axial direction 42, from the bottom portion 38 of the moving member 30. The coil spring 32 is compressed and the moving member 30 is urged away from the guide member 28 in a state where the flange portion 56 protruding outward contacts the tip of the guide member 28 and the movement of the moving member 30 is stopped. doing.

  Next, the rigidity that can be applied to the cable 20 in each state of the coupling device 16 shown in the side cross-sectional views of FIGS. 4A to 4D will be described using the graph of FIG. The graph of FIG. 5 shows the value 58 of the tension T generated in the cable 20 with respect to the displacement P of the end of the cable 20 (point G shown in FIGS. 4A to 4D). The position of the end portion (point G) of the cable 20 in the state B of 4 (b) is set to 0. Moreover, the values of A, B, C, and D in the graph are the values of the states A, B, C, and D shown in FIGS.

  In the state A shown in FIG. 4A, the cable 20 is in a loose state. Further, a gap is formed between one end of the coil spring 32 and the inner surface of the bottom portion 34 of the guide member 28, and the other end of the coil spring 32 and the inner surface of the bottom portion 38 of the moving member 30. Has become a natural length.

  In this state A, the tension of the cable 20 is 0, and the compression force as the urging force of the coil spring 32 is 0. Therefore, as shown in FIG. The rigidity of the spring 32 cannot be applied.

  In the state B shown in FIG. 4B, the moving member 30 is pulled by the cable 20 through the rod 22 and moves in the pulling direction 24, and one end of the coil spring 32 contacts the inner surface of the bottom 34 of the guide member 28. The other end of the coil spring 32 is in contact with the inner surface of the bottom 38 of the moving member 30.

  In this state B, since the coil spring 32 is not compressed, the compression force as the urging force of the coil spring 32 becomes 0 and the tension of the cable 20 becomes 0. However, as shown in FIG. Since the coil spring 32 is compressed, the small rigidity of the coil spring 32 can be applied to the cable 20. Further, since the coil spring 32 does not resist in the compression direction 26, the cable 20 cannot be rigid.

  In the state C shown in FIG. 4C, the moving member 30 is pulled by the cable 20 from the state B, and the moving member 30 further moves in the pulling direction 24, and protrudes outward from the bottom 38 of the moving member 30. The flange portion 56 is in contact with the distal end portion of the cylindrical portion 36 of the guide member 28 so that the movement of the moving member 30 is stopped.

  In this state C, the coil spring 32 is compressed and biases the moving member 30 in the direction away from the guide member 28, so that a compressive force is generated in the coil spring 32 as shown in FIG. Some tension (slight elongation) occurs. As a result, the cable 20 extends in the pulling direction 24 and the great rigidity of the cable 20 can be applied to the cable 20 as it is. Further, the small rigidity of the coil spring 32 can be applied to the cable 20 in the compression direction 26.

In the state D shown in FIG. 4D, the cable 20 is pulled from the state C and the initial tension T ₀ is introduced into the cable 20. This state D becomes a service state.

  In this state D, since the cable 20 is stretched and tension is generated in the cable 20, the great rigidity of the cable 20 can be applied to the cable 20 as it is in both the pulling direction 24 and the compressing direction 26 as shown in FIG. it can. In this state, the length from the inner surface of the bottom portion 34 of the guide member 28 to the inner surface of the bottom portion 38 of the moving member 30 is shorter than the natural length of the coil spring 32. Therefore, in the state D, the coil spring 32 is constant. Is in a compressed state.

  Next, the operation and effect of the coupling device and the net structure according to the embodiment of the present invention will be described.

In the coupling device 16 of this embodiment, as shown in FIG. 2, when an external force such as an upward load Wu or a downward load Wd acts on the cable 20 that is installed with the initial tension T ₀ applied, FIGS. As shown in (b) to (d), the tension of the cable 20 (the tension of the suspension cable 14 to which the upward load Wu is applied and the tension of the holding cable 12 to which the downward load Wd is applied) is reduced to the state D. Go to state B via C.

Accordingly, even in the state C in which the tension of the cable 20 is reduced and the extension amount of the cable 20 is reduced (the cable 20 is slightly extended), the moving member 30 is urged by the coil spring 32. The rigidity by 32 can be applied to the cable 20. Therefore, it is possible to suppress the loosening of the cable 20 that is caused by the external force of the upward load Wu and the downward load Wd with a simple mechanism using the elastic member (coil spring 20). Further, the initial tension T _{0 applied} to the cable 20 can be reduced.

  If the loosening of the cable 20 caused by the external force of the upward load Wu and the downward load Wd can be suppressed, the saddle-shaped curved surface of the cable net structure 10 formed by the plurality of holding cables 12 and the suspension cables 14 can be stably maintained. It is possible to prevent damage to an exterior material (not shown) such as a film or glass that is attached to the upper or lower surface of the cable net structure 10 and forms a roof surface.

Here, the conventional cable net structure (hereinafter, “cable net structure 70”) in which the ends of the holding cable 12 and the suspension cable 14 shown in FIG. 1 are pin-connected to the support portion 18 by the connecting device 68 shown in FIG. 7), the perspective view of FIG. 7 showing one holding cable 12 and one hanging cable 14 out of the plurality of holding cables 12 and suspension cables 14 arranged in the cable net structure 70, respectively. It can be seen from the graph of FIG. 8 that shows the value 72 of the tension T generated in the holding cable 12 with respect to the extension amount L and the graph of FIG. 9 that shows the value 74 of the tension T generated in the suspension cable 14 with respect to the extension amount L of the suspension cable 14. as such, the tension of the cable 12 holding the acts upward load Wu the cable net structure 70 is increased from an initial tension T ₀ (Fig. 8 Arrow 60), the tension of the hanging cable 14 is reduced from the initial tension T ₀ (arrow 62 in FIG. 9). When the extension amount L of the suspension cable 14 becomes zero, the tension of the suspension cable 14 becomes zero. When the downward load Wd is applied to the cable net structure 70, the tension of the suspension cable 14 increases from the initial tension T ₀ (arrow 64 in FIG. 9), and the tension of the holding cable 12 decreases from the initial tension T ₀ (FIG. 8). Arrow 66). When the extension amount L of the holding cable 12 becomes zero, the tension of the holding cable 12 becomes zero.

Therefore, when the upward load Wu and the downward load Wd are applied to the holding cable 12 and the hanging cable 14 to which the initial tension T ₀ is applied, the holding cable 12 and the hanging cable 14 have rigidity of the holding cable 12 and the hanging cable 14. It works.

  Examples of the design criteria for such a cable net structure include the following conditions (a) to (d).

(A) The tension generated in the holding cable 12 during operation (the initial tension T ₀ to be introduced into the holding cable 12) is set to be equal to or less than the long-term allowable tension of the holding cable 12. In addition, the tension generated in the suspension cable 14 during operation (initial tension T ₀ to be introduced into the suspension cable 14) is set to be equal to or lower than the long-term allowable tension of the suspension cable 14.

(B) The tension generated in the holding cable 12 when the upward load Wu consisting of the blowing wind load is applied is set to be equal to or less than the short-term allowable tension of the holding cable 12. Further, the tension generated in the suspension cable 14 when the downward load Wd consisting of the wind-down wind load and the snow load is applied is set to be equal to or less than the short-term allowable tension of the suspension cable 14.

(C) When the upward load Wu consisting of the blowing wind load is applied, the suspension cable 14 is not completely loosened (the tension generated in the suspension cable 14 does not become zero). Further, when a downward load Wd consisting of a wind-down wind load or a snow load is applied, the pressing cable 12 is not completely loosened (the tension generated in the pressing cable 12 does not become zero).

(D) The displacement that can occur in the presser cable 12 and the suspension cable 14 is set to a permissible value or less.

In actual design, the condition (c) is often dominant, but in order to clear this condition, it is necessary to introduce a large initial tension T ₀ into the holding cable 12 and the suspension cable 14. For this reason, the connecting device 68 is also strong and large, and the work of installing the holding cable 12 and the suspension cable 14 (work of introducing the initial tension T ₀ into the holding cable 12 and the suspension cable 14) becomes difficult.

On the other hand, in the coupling device 16 of the present embodiment, the condition (c) can be cleared even if the initial tension T _{0 applied} to the cable 20 is small.

  Moreover, in the coupling device 16 of this embodiment, as shown in FIG.2 and FIG.5, the upward load Wu which consists of a blowing wind load acts on the suspension cable 14, or it blows down on the holding | suppressing cable 12, and a wind load or When the downward load Wd consisting of a snow load is applied, the tension of the suspension cable 14 or the holding cable 12 is reduced, and the extension amount of the hanging cable 14 or the holding cable 12 is reduced (the hanging cable 14 or the holding cable). In the state C to the state B after 12), only the rigidity of one cable 20 (the holding cable 12 in the case of the upward load Wu or the suspension cable 14 in the case of the downward load Wd) is almost effective. The rigidity of the entire cable net structure 10 is reduced.

  As a result, the suspension cable 14 and the holding cable 12 bend greatly as the rigidity of the entire cable net structure 10 decreases, but one cable 20 (the holding cable 12 in the case of the upward load Wu or the downward load Wd). In this case, since the contribution of the geometric rigidity of the suspension cable 14) (the rigidity added by the bending angle change caused by the bending of the cable 20) increases, the amount of bending of the suspension cable 14 and the holding cable 12 can be suppressed. it can.

In addition, the contribution of geometric rigidity (stiffness added by changing the bending angle due to the bending of the cable 20) of one cable 20 (the holding cable 12 in the case of the upward load Wu or the suspension cable 14 in the case of the downward load Wd). Therefore, the initial tension T ₀ introduced into one cable 20 (the holding cable 12 in the case of the upward load Wu or the suspension cable 14 in the case of the downward load Wd) can be reduced.

  The embodiment of the present invention has been described above.

  In the present embodiment, as shown in FIG. 3, the guide member 28 and the moving member 30 are shown as bottomed cylindrical members. However, if the moving member 30 is movable along the guide member 28, The guide member 28 and the moving member 30 may have other shapes.

  Moreover, in this embodiment, as shown in FIG. 3, although the example which used the coil spring 32 as one elastic member was shown, the coil spring 32 may be plural. Also, the elastic member is a combination of a plurality of coil springs having different rigidity and natural length (for example, a second coil spring having a shorter natural length and a smaller outer diameter than the first coil spring is disposed inside the first coil spring. It is also possible to do this. In this way, the rigidity of the elastic member can be changed gently between the state B and the state C shown in FIG. 5 according to the displacement P, and the impact force due to the change in the rigidity can be changed. Occurrence can be suppressed.

  Furthermore, in this embodiment, as shown in FIG. 3, an example in which the elastic member is a coil spring 32 is shown. However, the elastic member has elasticity and can give rigidity to the cable 20. That's fine. For example, the elastic member may be a rubber member.

  In the present embodiment, in the state of FIG. 4A, one end of the coil spring 32 and the inner surface of the bottom 34 of the guide member 28, and the other end of the coil spring 32 and the inner surface of the bottom 38 of the moving member 30 are not in contact. Although one example of the coil spring 32 may be joined to the bottom 34 of the guide member 28 and the other end of the coil spring 32 may be joined to the bottom 38 of the moving member 30 by welding or the like. In this case, the rigidity of the coil spring 32 is inclined between the state A and the state B shown in FIG. Also, one end or the other end of the coil spring 32 is joined to the bottom 34 of the guide member 28 or the bottom 38 of the moving member 30 by welding or the like, and the other end or one end of the coil spring 32 and the inner surface of the bottom 38 of the moving member 30 or The inner surface of the bottom 34 of the guide member 28 may be non-contact. In this case, the relationship of the tension T generated in the cable 20 with respect to the displacement P of the end portion (point G) of the cable 20 is the same as the value 58 in FIG.

  Further, between the guide member 28 and the moving member 30 shown in the present embodiment (shown in FIG. 3, the outer peripheral surface of the cylindrical portion 40, the rear wall surface of the protruding portion 54, the inner peripheral surface of the cylindrical portion 36, and the protrusion A cushioning material may be provided in the space V) surrounded by the wall surface on the rear side of the portion 52. For example, the space V may be filled with oil as a buffer material, or a rubber member as a buffer material may be provided between the rear wall surface of the projection 54 and the rear wall surface of the projection 52. In this way, the rigidity can be gently changed between the state B and the state C shown in FIG. 5, and the generation of impact force due to the change in rigidity can be suppressed.

  Further, the coupling device 16 shown in the present embodiment may be provided with an engaging portion 76 as a fixing means as shown in the side sectional view of FIG. The engaging portion 76 is fixed in the vicinity of the end portion of the rod 22, and when the moving member 30 is urged in the direction away from the guide member 28 by the coil spring 32 and moves by a predetermined amount, the engaging portion 76 is moved to the guide member. The movement of the rod 22 is stopped by hitting the outer surface of the bottom 34 of the 28, and the end (rod 22) of the cable 20 is fixed to the guide member 28. In this way, when the moving member 30 moves by a predetermined amount, the compression force is transmitted from the cable 20 to the guide member 28, and the compression rigidity can be applied to the cable 20. Thereby, the bending amount of the cable 20 can be reduced.

  Further, in the present embodiment, as shown in FIG. 2, the both end portions of the holding cable 12 and the suspension cable 14 are connected to the support portion 18 by the connecting device 16. One end may be coupled to the support 18 by the coupling device 16. Further, both ends of one of the holding cable 12 and the suspension cable 14 may be connected to the support portion 18 by the connecting device 16. That is, when it is desired to suppress the loosening of the cable with respect to the upward load Wu composed of the blowing wind load, one end portion or both end portions of the suspension cable 14 may be connected to the support portion 18 by the connecting device 16. When it is desired to suppress the loosening of the cable with respect to the downward load Wd consisting of a downwind load or a snow load, one end or both ends of the presser cable 12 may be connected to the support portion 18 by the connecting device 16.

  Moreover, in this embodiment, as shown in FIG. 2, although the tension | tensile_strength material showed the press cable 12 and the suspension cable 14 which consist of steel wires, the tension | tensile_strength material is a linear member which can form a net structure. I just need it. For example, the tension member may be a cable made of another material such as a stainless steel wire or a rod member.

  Further, in the present embodiment, as shown in FIG. 2, an example is shown in which the holding cable 12 and the suspension cable 14 are pressed and brought into contact with each other. What is necessary is just to be provided so that transmission of force between 12 and the suspension cable 14 is attained. For example, the holding cable 12 and the suspension cable 14 may be tied by binding or the like.

  Moreover, in this embodiment, as shown in FIG. 2, the both ends of the holding | maintenance cable 12 and the suspension cable 14 showed the example connected with the support part 18 provided in housings, such as a beam and a wall, with the connection apparatus 16. However, as long as the holding cable 12 and the suspension cable 14 can be installed, the support portion may be another part.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

10 Cable net structure (net structure)
12 Holding cable (holding tension material, tension material)
14 Suspension cable (suspending tension material, tension material)
16 coupling device 18 support part 20 cable (pressing tension material, suspension tension material, tension material)
28 Guide member 30 Moving member 32 Coil spring (elastic member)
76 Engagement part (fixing means)

Claims (3)

In the connecting device in which the end portions of the tension members constructed between the support portions are connected in a state where the initial tension is applied,
A guide member fixed to the support part;
An end of the tension member is connectable and is movable along the guide member; and
The guide member is provided such that one end thereof contacts the guide member and the other end contacts the moving member. An elastic member for biasing the moving member in a direction away from
Connecting device.   The connection according to claim 1, further comprising a fixing unit that fixes an end portion of the tension member to the guide member when the moving member is biased in a direction away from the guide member by the elastic member and moves by a predetermined amount. apparatus. In a net structure provided with the connection device according to claim 1 or 2,
A net structure in which the tension material is composed of a pressing tension material that protrudes upward, and a suspension tension material that contacts and intersects with the pressing tension material and protrudes downward.