JP2007205113A - Connecting device for structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To freely adjust the erection angle of a tension member to a bracket and to allow the tension member to follow the change of the erection angle in spite of simple structure in a connecting device impeding the relative displacement, exceeding a fixed quantity, of an upper structure to a lower structure or to another upper structure between the upper structure and the lower structure displaceable relative to each other, or between the upper structures. <P>SOLUTION: The connecting device 1 is composed of a bracket 2 fixed to the upper structure or the lower structure 10; an intermediate part connecting member 4 connected rotatably around a shaft 3 parallel with a fixed surface; and an end connecting member 6 connected rotatably around a shaft 5 in a direction to intersect the shaft 3, while the end of the tension member 7 erected between the upper structure and lower structure 10 or between the upper structures is connected to the end connecting member 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a connecting device for a structure that limits a relative displacement amount between a structurally separated superstructure and a substructure, or between superstructures with respect to a substructure of the superstructure or with respect to another superstructure. .

  For example, a connecting device such as a fallen bridge prevention device shown in FIG. 4 is constructed between the upper structure and the lower structure, or between the upper structures, such as between structurally separated bridge girders and piers, or between adjacent bridge girders. Or a function of limiting the amount of relative displacement of the superstructure with respect to the other superstructure within a certain range. Specifically, the connecting device includes a bracket for connecting an end of a tensile material such as a PC steel (cable) constructed between the upper structure and the lower structure or between the upper structures to the upper structure or the lower structure, The relative displacement amount of the superstructure is limited by applying a tensile force to the tensile material at the time of relative displacement (see Patent Document 1).

  The bracket of this coupling device (displacement amount limiting device) is fixed to the upper structure or lower structure with the orientation adjusted in advance so that the tensioned material can be maintained even when the tensile material is relatively displaced. Since the installation angle of the tensile material changes at the time of relative displacement between them, it is necessary to be connected to the tensile material so that the tensile material can follow the change in the angle.

  In order for the tension member to follow the change in the erection angle, it is necessary to support the tension member on the bracket so that the erection angle of the tension member relative to the bracket can be freely set or adjusted. It is necessary to support the bracket rotatably about a certain amount around the horizontal axis and the vertical axis (see Patent Document 2).

JP-A-9-053205 (Claim 1, paragraphs 0019 to 0048, FIGS. 1 to 10) JP-A-9-158118 (Claim 1, paragraphs 0021 to 0029, FIGS. 1 to 3)

  According to the method of Patent Document 2, a swing arm connected to a pressure bearing plate to which an end of a cable is fixed is connected to an arm connection block so as to be rotatable about a vertical axis, and the arm connection block is attached to a bracket (cable By connecting to the brackets so as to be rotatable about the horizontal axis, it is possible to install the cable by inclining it with respect to the fixed surface of the bracket and to follow the change in the inclination angle. .

  However, in Patent Document 2, since the two swing arms 5 and 5 are used as a pair (Claim 1), the cable 11 cannot be directly connected to the swing arm 5, and therefore the swing arm must be used. A member (supporting plate 7) for connecting the cable 11 must be disposed at the tip positions of 5 and 5. If the cable 11 is connected to any one of the swing arms 5, a bending moment due to eccentricity is also generated in the swing arm 5. Conversely, since the axis of the cable 11 and the axis of the swing arm 5 are not on the same line, it is indispensable to pair the swing arms 5 and 5 with each other.

  The present invention proposes a connecting device that can freely adjust the erection angle of the tension member with respect to the bracket and can follow the change in the erection angle while having a simple structure.

  According to a first aspect of the present invention, there is provided a connecting device for a structure, including a bracket fixed to an upper structure or a lower structure between an upper structure and a lower structure that can be displaced relative to each other or between upper structures, and the bracket. An intermediate connecting member connected rotatably about an axis parallel to the fixed surface, and an intermediate connecting member connected to the intermediate connecting member rotatably about an axis in a direction intersecting the axis, It is a constituent requirement to include an end connecting member to which an end of a tensile member laid between the structure and the lower structure or between the upper structures is connected. The end portion of the tension member is connected directly to the end connection member or indirectly through a sleeve or the like according to the material or form. The bracket fixing surface refers to the upper structure or the lower structure side surface or surface of the bracket.

  The end of the tension member is connected to the end connecting member, the end connecting member is connected to the intermediate connecting member, and the intermediate connecting member is connected to the bracket. Therefore, the configuration of the coupling device is simplified. By reducing the number of parts, manufacturing costs can be reduced, and assembly workability on site can be improved.

  The fixing surface of the bracket to the upper structure or the lower structure is determined by the installation position and the installation surface of the bracket, and may be a vertical surface, a horizontal surface, or a surface inclined with respect to either. In any case, the intermediate connecting member is connected to the bracket so as to be rotatable about an axis parallel to the fixed surface, that is, a vertical axis, a horizontal axis, or an axis inclined with respect to these.

  The shaft that connects the end connecting member to the intermediate connecting member (the shaft of the end connecting member) intersects with the axis that connects the intermediate connecting member to the bracket (the axis of the intermediate connecting member). Orientation direction, the middle and end couplings are rotatable around their respective axes, and the tensile material rotates in two directions intersecting the bracket, ie, the vertical and horizontal axes It will be connected freely. For example, when the axis of the intermediate connecting member is a vertical axis and the axis of the end connecting member is orthogonal to the axis, the axis of the end connecting member is a horizontal axis.

  The tensile material can be rotated in two directions, so that the installation angle of the tensile material with respect to the bracket can be freely adjusted, and the tensile material is associated with the relative displacement between the upper structure and the lower structure, or between the upper structures. It is possible to follow changes in the installation angle.

  Further, since the intermediate portion connecting member is rotatable around an axis parallel to the fixing surface of the bracket (an intermediate portion connecting member axis), the intermediate portion connecting member is connected via the end connecting member as described in claim 3 described later. Since the extension line of the tensile material shaft can be crossed on the rotation axis (intermediate connecting material axis), when the tensile force from the tensile material is applied, the intermediate connecting material itself receives a bending moment. Can not be. If the intermediate connecting member is rotatable about an axis perpendicular to the fixed surface, the end connecting member cannot be connected to the intermediate connecting member on the extension line of the shaft, or it becomes difficult. Eccentricity occurs between the material shafts of the material, and the bending moment is borne by the tensile force from the tensile material.

  According to a second aspect of the present invention, in the connecting device according to the first aspect, the extension line of the material shaft of the tensile material is located on the material shaft of the shaft that rotatably connects the end connecting material to the intermediate connecting material. Is a constituent requirement. In this case, the extension line of the material shaft of the tensile member is positioned on the material shaft of the shaft of the end connecting member, so that the tensile force acting on the tensile member acts on the center of the shaft of the end connecting member.

  Therefore, the eccentric moment when the extension line of the material shaft of the tensile material is not located on the material shaft of the shaft connecting the end connecting material does not act on the end connecting material, and is as large as when there is eccentricity. It is not necessary to give the end connecting member a cross section. For example, when the material axis of the tensile material is not on the material axis of the swing arm as in Patent Document 2, an eccentric moment acts on the bearing plate connecting the two, whereas such a situation occurs in claim 2 do not do.

  According to a third aspect of the present invention, there is provided the connecting device according to the first or second aspect, wherein the extension line of the material shaft of the tensile material is a shaft (intermediate portion connection) that rotatably connects the intermediate portion connection material to the bracket. It is a constituent requirement that it is located on the material axis of the material axis. In this case, the extension line of the material shaft of the tensile material is positioned on the material shaft of the shaft of the intermediate connecting member, so that the tensile force acting on the tensile material acts on the center of the shaft of the intermediate connecting material.

Therefore, the eccentric moment when the extension line of the tensile material shaft is not located on the shaft of the intermediate connecting member does not act on the intermediate connecting member, and the size is as large as when there is eccentricity. It is not necessary to give a cross section to the intermediate part connecting material.

  In claim 2, when the extension line of the material axis of the tensile material is located on the material axis of the shaft of the intermediate connecting member, the cross section, that is, the size or the scale of the end connecting material and the intermediate connecting material is set. Since it can suppress to the minimum, the mass which combined the edge part connection material and the intermediate part connection material is also suppressed to the minimum.

  According to a fourth aspect of the present invention, in the connecting device according to any one of the first to third aspects, the tensile shaft has a material axis that intersects the base plate of the bracket. Since the bracket has a base plate that is directly fixed to the upper structure or the lower structure, it is possible to reduce the bending moment acting on the base plate when the extension line of the tensile material axis is in the range that intersects the base plate become.

  The tensile force from the tensile member is transmitted to the bracket through the end connecting member and the intermediate connecting member, and is borne by the upper structure or the lower structure through the bracket. It is possible to reduce the bending moment that acts on the fixed surface of the bracket due to the tensile force from the tensile material by crossing, such as perpendicular to the base plate, and accordingly the cross section of the bracket can be reduced. become.

  When used in a state in which the base plate of the bracket and the material axis of the tensile material are nearly parallel as in Patent Document 2, the base plate is supported by the bracket as long as the material axis of the tensile material is not flush with the base plate. A bending moment acts from the shaft. On the other hand, if the base plate of the bracket and the material axis of the tensile material are orthogonal to each other, for example, a bending moment does not act on the base plate from the tensile material supported by the bracket. If the crossing is not orthogonal, the base plate will only generate a bending moment of the tensile force from the tensile material parallel to the base plate, and the vertical component of the base plate will not generate a bending moment. As a result, the bending moment is reduced as compared with the case where the axis of the tensile material is nearly parallel.

  5. The tension material axis according to claim 4, wherein the extension line of the tension material axis is located on the axis of the axis (the end connection material axis) connecting the end coupling material to the intermediate coupling material. When the extension line is positioned on the material axis of the shaft that connects the intermediate connecting member to the bracket (the shaft of the intermediate connecting member), the cross section of the end connecting member and the intermediate connecting member is minimized. Since the cross section of a bracket can be suppressed above, it is possible to minimize the mass of the whole coupling device.

  As described above, in the present invention, the bracket is fixed to the upper structure or the lower structure in the present invention, the intermediate part connecting member is rotatably connected to the bracket around an axis parallel to the fixing surface, and the intermediate part. The coupling device is composed of three types of parts by being composed of an end coupling material that is coupled to the coupling material so as to be rotatable about an axis that intersects the axis, and to which an end of the tensile material is connected. Therefore, the configuration of the coupling device can be simplified, and the reduction in the number of parts can reduce the manufacturing cost and improve the assembly workability at the site.

  The intermediate connecting member is rotatably connected around an axis parallel to the fixed surface of the bracket, and the shaft connecting the end connecting member to the intermediate connecting member is relative to the shaft connecting the intermediate connecting member to the bracket. By facing the intersecting direction, the tensile material is rotatably connected to the two directions intersecting the bracket, so the tensioning angle of the tensioning material relative to the bracket can be adjusted freely, and the tensioning material can be It can be made to follow the change of.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 3, the present invention includes a bracket 2 fixed to an upper structure or a lower structure 10, and an intermediate portion connected to the bracket 2 so as to be rotatable around an axis 3 parallel to the fixing surface. A structure comprising a connecting member 4 and an end connecting member 6 connected to the intermediate connecting member 4 so as to be rotatable about an axis 5 in a direction intersecting the shaft 3 and to which an end of the tension member 7 is connected. It is the connection apparatus 1 of a thing. The tension member 7 is installed between the upper structure and the lower structure 10 or between the upper structures, and the connecting device 1 is installed at each end of the tension member 7.

  The upper structure and the lower structure 10 are structurally separated structures through seismic isolation bearings, rolling or sliding bearings, etc., to the extent that they can be displaced relative to each other during an earthquake or strong wind. If it is a pier or abutment, the upper structure is a bridge girder or a floor slab, and if the lower structure 10 is a foundation, the upper structure is a structure on the foundation. The relative displacement includes a relative rotational displacement in addition to a displacement in a facing direction between the upper structure and the lower structure 10 or between the upper structures.

  The connecting device 1 is used as a falling-bridge prevention device when it is installed between a bridge pier or abutment as the lower structure 10 and a bridge girder or floor slab as the upper structure, but the application is not limited to this. For example, in suspension bridges and cable-stayed bridges, etc., it is used for any part where the function of restraining relative displacement exceeding a certain amount is exerted by bearing tensile force at the time of relative displacement, such as parts for supporting bridge girders etc. from cables. The

  The bracket 2 includes a base plate 2a fixed to the upper structure or the lower structure 10 by a fixing material 9 such as an anchor or an anchor bolt, and a receiver fixed to the surface of the base plate 2a by welding, bolts, or the like in a plane perpendicular thereto. A rib plate 2c is provided on the surface of the base plate 2a to reinforce the plate 2b and to prevent the receiving plate 2b from toppling over.

  The base plate 2a is provided with a fixing hole 2d through which the fixing material 9 to be fixed to the upper structure or the lower structure 10 is inserted, and the receiving plate 2b is inserted through which the shaft 3 supporting the intermediate connecting member 4 is inserted. Hole 2e is formed. The back surface or the surface of the base plate 2 a fixed to the upper structure or the lower structure 10 becomes a fixing surface of the bracket 2.

  The intermediate portion connecting member 4 includes an insertion portion 4a having an insertion hole 4c through which the shaft 3 is inserted, and a connection portion 4b having an insertion hole 4d through which the shaft 5 is inserted. The end connecting member 6 is connected to the connecting portion 4b. When the insertion part 4a and the connection part 4b are integrated, the intermediate part connection material 4 is formed by casting, forging, or the like.

The end connecting member 6 is connected to an insertion portion 6a having an insertion hole 6c through which the shaft 5 is inserted, and is integrated with or integrally joined to the insertion portion 6a, and the tension member 7 is connected by screwing or filling with a filler. It has a cylindrical connection portion 6b. As shown in FIG. 1, when the tension member 7 is connected by screwing, a screw hole 6d having a female thread is formed in the connecting portion 6b, and when connecting by a filler such as an adhesive or mortar, the connecting portion An insertion hole into which the tensile material 7 is inserted is formed in 6b. The end connecting member 6 is also formed by casting, forging or the like when the insertion portion 6a and the connection portion 6b are integrated.

  The insertion portion 6a of the end connecting member 6 is connected to the connecting portion 4b of the intermediate connecting member 4 by the shaft 5, but in the drawing, the tensile force from the tensile member 7 is eccentric from the end connecting member 6. Two insertion parts 6a are juxtaposed so as not to be transmitted to the intermediate part connection material 4, and the insertion parts 6a, 6a sandwich the connection part 4b.

  The tensile material 7 is made of PC steel rod, PC steel material such as PC steel wire, and fiber reinforced material formed by impregnating resin material into glass, graphite, aramid, or metal fiber and curing it into a rod shape. Then, a joint 8 such as a sleeve for connection to the end connecting member 6 is integrated at the end by pressure bonding or adhesion such as an adhesive or mortar. When the joint 8 is screwed into the connecting portion 6b of the end connecting member 6, a male thread is formed on the surface of the joint 8 as shown in FIG.

  As shown in FIGS. 1 and 3, the intermediate portion connecting member 4 is inserted between the two receiving plates 2b and 2b of the bracket 2 at the insertion portion 4a, and the insertion hole 2e of the receiving plate 2b and the insertion hole 4c of the insertion portion 4a. When the shaft 3 passes through the bracket 2, it is connected to the bracket 2 so as to be rotatable around the shaft 3 parallel to the fixed surface thereof. In FIG. 1, the bracket 2 is fixed to the vertical surface of the upper structure or the lower structure 10, and the fixed surface and the shaft 3 are oriented in the vertical direction, but may be oriented in the horizontal direction.

  For example, as shown in FIG. 1, a pin having male threads cut at both ends is used for the shaft 3, and a nut 3a is fastened to a portion of the pin protruding from the receiving plates 2b and 2b via a washer. The part connecting member 4 is rotatably connected to the bracket 2.

  The rotatable angle of the intermediate connecting member 4 is arbitrarily set. However, when the shaft 3 is a vertical shaft, as shown in FIG. It is sufficient if it can rotate about 15 °. When limiting the angle at which the intermediate portion connecting member 4 can rotate, the rib plate 4c is arranged so that the connecting portion 4b contacts the rib plate 2c when the intermediate portion connecting member 4 rotates by a certain angle. Good.

  The end connecting member 6 is abutted so as to sandwich the connecting portion 4b of the intermediate connecting member 4 at the inserting portions 6a and 6a, and the shaft 5 passes through the inserting hole 6c of the inserting portion 6a and the inserting hole 4d of the connecting portion 4b. As a result, the intermediate connection member 4 is rotatably connected around the axis 5 in a direction intersecting the axis 3. In FIG. 1, the shaft 3 is directed to the vertical plane and the shaft 5 is directed to the horizontal plane, but may be directed to the vertical plane.

  As shown in the figure, for example, a pin having a protrusion protruding from the end face and a stop plate 5a having a hole in which the protrusion is fitted on the surface on the pin side are used for the shaft 5, and the pin protrudes from the insertion portions 6a and 6a. The end connecting member 6 is rotatably connected to the intermediate connecting member 4 by fitting the stop plate 5a.

  The rotatable angle of the end connecting member 6 is also arbitrarily set. However, when the shaft 5 is a horizontal axis, as shown in FIG. It is sufficient if it can be rotated about 30 °. When limiting the rotatable angle of the end connecting member 6, the receiving plate 2b is arranged so that the insertion portion 6a contacts the receiving plate 2b when the end connecting member 6 rotates by a certain angle. Good.

  FIG. 3 shows how the constituent members of the coupling device 1 shown in FIG. 1 are assembled. Here, a situation in which one bracket 2 is fixed to the side surface of the lower structure 10 and the other bracket 2 is fixed to the upper structure is shown.

It is the perspective view which showed the structure and assembly point of the connection apparatus. (A) is the perspective view which showed the rotation angle of the intermediate part connection material with respect to the axis | shaft of an intermediate part connection material, (b) is the perspective view which showed the rotation angle of the end part connection material with respect to the axis | shaft of an end part connection material. It is the perspective view which showed the use condition of the coupling device shown in FIG. It is the perspective view which showed the use condition of the conventional coupling device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Connecting device 2 ... Bracket 2a ... Base plate 2b ... Receiving plate 2c ... Rib plate 2d ... Fixing hole 2e ... Insertion hole 3 ... Shaft 3a ... Nut 4 ... Intermediate part Connecting member 4a ... Inserting part 4b ... Connecting part 4c ... Inserting hole 4d ... Inserting hole 5 ... ... Shaft 5a ... Stop plate 6 ... ... End connecting member 6a ... Inserting part 6b ... Connecting part 6c: Insertion hole 6d: Screw hole 7: Tension material 8: Fitting 9: Fixing material 10: Substructure

Claims (4)

  A bracket fixed to the upper structure or the lower structure between the upper structure and the lower structure that can be displaced relative to each other or between the upper structures, and the bracket can be rotated about an axis parallel to the fixing surface. An intermediate connecting member to be connected, and the intermediate connecting member are rotatably connected around an axis in a direction intersecting the axis, and are installed between the upper structure and the lower structure or between the upper structures. And an end connecting member to which an end of the tensile member is connected.   2. The connecting structure according to claim 1, wherein an extension line of the material shaft of the tensile material is located on a material shaft of a shaft that rotatably connects the end connecting material to the intermediate connecting material. apparatus.   3. The structure according to claim 1, wherein an extension line of the material shaft of the tensile material is located on a material shaft of a shaft that rotatably connects the intermediate portion connecting material to the bracket. Coupling device. 4. The connecting device for a structure according to claim 1, wherein a material axis of the tensile material intersects a base plate of the bracket.

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