JP6199075B2 - Support structure - Google Patents

Description

  The present invention relates to a connecting member with a length adjusting function, a connecting method, and a support structure.

  Conventionally, for example, one disclosed in Patent Document 1 is known as one that needs to temporarily connect one structure that can move relative to each other and another structure. Patent Document 1 describes a girder erection device that erects a girder material on a pier. This girder installation device includes a portal-type front tower, a portal-type rear tower, a suspended girder spanned between the front tower and the rear tower, a handrail, and a traveling girder. Yes. In this girder installation device, a front tower and a rear tower are installed on each pier on which a girder is installed, and a traveling girder is installed between the piers. The newly installed girders are transported using the existing girders, and the new girders are transported to the area between the front and rear towers while passing through the inner area of the rear tower, and temporarily placed on the traveling girder. To do. After that, the new girder is lifted with the hanging girder, the traveling girder is pulled out, the hanging girder is lowered, and the new girder is installed between the piers. When the erection is completed, the front tower, the rear tower, the suspension girder, and the handbill are moved along the traveling girder to the installation place for the next girder erection. In such a girder installation device, when the front tower, the rear tower, the suspension girder, and the spreader move along the traveling girder, the propulsion jack provided in the spreader grips the traveling girder, and the traveling girder It takes a reaction force from and moves.

JP 2008-303657 A

  In the girder installation device as described above, when the traveling girder is supported only by the frictional force between the bridge piers without providing a connecting structure, it is relative to the weight between the handrail and the traveling girder. If there is no significant difference between the two, or if there is not enough friction depending on the fulcrum situation (the vertical reaction force of the fulcrum is small), the horizontal reaction force (the horizontal reaction force is opposite to the moving direction, In the gradient section, the traveling girder may be displaced with respect to the bridge pier. Therefore, a support structure for temporarily fixing such a traveling girder to the pier has been demanded. Such fixing is required to be performed securely, but it is also required that it can be easily performed without using a large-scale device or structure when adjusting the length of the connecting member.

  Accordingly, an object of the present invention is to provide a connecting member with a length adjusting function, a connecting method, and a support structure that can be easily and reliably fixed when temporarily fixing structures together. To do.

  The connecting member with a length adjusting function according to the present invention is a connecting member with a length adjusting function that connects the first structure and the second structure, and one end side is connected to the first structure. And a first long member extending in the connecting direction, a second long member having one end connected to the second structure and extending in the connecting direction, and the other end of the first long member. A first tightening member, a second tightening member disposed on the other end of the second elongate member, and a first tightening member and a second tightening member in the connecting direction; A third fastening member disposed between the first fastening member and the second fastening member, the first fastening member and the second fastening member extending in the connecting direction between at least the first fastening member and the second fastening member. At least a pair of intermediate long members connected to the member, and the first long member is connected to the third fastening member on the other end side, The second long member is connected to the second tightening member on the other end side, or the first long member is connected to the first tightening member on the other end side and the second long member The member is connected to the third fastening member on the other end side, the third fastening member is movable relative to the intermediate long member, and the third fastening member is connected to the intermediate long member. The length can be adjusted by changing the position.

  According to the connecting member with a length adjusting function according to the present invention, the intermediate long member extends in the connecting direction at least between the first fastening member and the second fastening member, and the first fastening member The member and the second fastening member are connected. Moreover, the 3rd clamping member arrange | positioned between a 1st clamping member and a 2nd clamping member is relatively movable with respect to an intermediate | middle elongate member. Therefore, when the first long member is connected to the third fastening member on the other end side and the second long member is connected to the second fastening member on the other end side, By bringing the third fastening member closer to the second fastening member, the first elongate member and the second elongate member can be brought closer to each other. Alternatively, when the first elongate member is connected to the first tightening member on the other end side and the second elongate member is connected to the third tightening member on the other end side, The first elongate member and the second elongate member can be brought closer by bringing the third fastening member closer to the first fastening member. As a result, the length of the entire connecting member can be shortened, and the first structure and the second structure can be reliably fixed in a state where sufficient tension is generated. Further, such a secure fixing can be easily performed by a simple structure including the fastening members and the intermediate long member, and by simply moving the third fastening member. As described above, when the structures are temporarily fixed to each other, the fixing can be easily and reliably performed.

  Further, in the connecting member with a length adjusting function according to the present invention, at least one of the first, second and third tightening members and the intermediate long member are intermediate long members. It may be connectable by the fastening structure by the bolt part and nut which were formed in this. Thereby, the connection and the release of the connection can be easily performed. In addition, it is possible to easily adjust the position between the fastening members along the intermediate long member.

  Further, in the connecting member with a length adjusting function according to the present invention, the fastening structure may be any of a reaction force nut that applies a reaction force to any of the tightening members and a reaction force nut. And a nut for preventing rattling that sandwiches the tightening member. This makes it possible to reliably connect the intermediate long member and the fastening member.

  In the connecting member with a length adjusting function according to the present invention, between the first tightening member and the third tightening member, or between the second tightening member and the third tightening member. The jack arrangement | positioning part which can arrange | position the jack which changes the position of a 3rd clamping member may be formed. The jack can be arranged in the jack arrangement portion, and by extending the jack, the length can be adjusted by easily moving the third fastening member relative to the intermediate long member. .

  In the connecting member with a length adjusting function according to the present invention, at least one of the one end side of the first elongate member and the one end side of the second elongate member is around a pair of axes perpendicular to each other. A rotatable joint member may be provided. Accordingly, at least one connection portion between the first structure and the first elongate member and between the second structure and the second elongate member is rotated around one axis. In addition, it can also be rotated around an axis perpendicular to the axis of the position. Accordingly, it is possible to three-dimensionally adjust the connecting position of each connecting member with a length adjusting function with respect to each structure. Further, according to this mechanism, the fixing can be performed even if the direction of the end fixing member of the connecting member does not coincide with the axial direction of the connecting member.

  Moreover, the connection method with a length adjustment function which concerns on this invention is a connection method which connects a 1st structure and a 2nd structure with the above-mentioned connection member with a length adjustment function, Comprising: The length of the connecting member with the length adjusting function is adjusted by changing the position of the third fastening member with respect to the member. Thus, when the structures are temporarily fixed, the fixing can be easily and reliably performed.

  The support structure according to the present invention is a support structure using the above-described connecting member with a length adjusting function, wherein the first structure is a bridge pier, and the second structure is in the front-rear direction with respect to the pier. A traveling girder of a movable girder installation device, wherein the traveling girder is connected to the pier by a front connection member disposed on the front side of the pier and a rear connection member disposed on the rear side, and the front connection member and A connecting member with a length adjusting function is used for at least one of the rear connecting members. As a result, the traveling girder can be supported by the rear connection member when the handrailer moves forward by gripping the traveling girder with the propulsion jack and taking the reaction force. Moreover, also when a hand-roller moves back, a traveling girder can be supported by the front side connection member. Also, by placing both the front and rear connecting members between the traveling girder and the pier and fixing the traveling girder with a propulsion jack, not only the front and rear tower legs but also the traveling girder The seismic resistance in the direction of the bridge axis of the entire girder installation device when temporarily fixed to the pier can be improved.

  According to the present invention, when the structures are temporarily fixed, the fixing can be performed easily and reliably.

It is the schematic block diagram which looked at the girder installation apparatus which employ | adopted the support structure which concerns on embodiment of this invention from the horizontal direction. Schematic configuration diagram showing how the girders are being transported in order to construct the girders on the pier using the girder construction device (girder transportation and girder construction on the installed girders and on the pier using a carriage (Situation diagram being installed on the traveling girder of the aircraft). Schematic configuration diagram showing the situation when the traveling girder is put forward to install the girder on the pier using the girder construction device (the girder suspended from the girder suspended by the girder of the girder construction machine, It is a situation diagram when the rear end of the traveling girder is deflected and the traveling girder is fed forward by the propulsion jack in the spreader. Schematic configuration diagram showing a state when a girder material is installed on a bridge pier using a girder installation device, and the girder installation device is moved forward to the next girder installation position (the rear end of the hanging girder is vertically supported by a rear receiving car, FIG. 6 is a situation diagram when the traveling girder is on the traveling girder and the traveling girder is made a reaction force by the propulsion jack in the deeding machine and other than the traveling girder is moving forward). It is the figure (side view) which looked at the support structure concerning this embodiment from the horizontal direction. It is the figure (back view) which looked at the support structure concerning this embodiment toward back from the back. It is the figure (plan view) which looked at the support structure concerning this embodiment from the upper part. (A) is the enlarged view of the part shown to VIIIa in FIG. 5, (b) is the enlarged view of the part shown to VIIIb in FIG. It is a perspective view of a connection member with a length adjustment function. It is a front view of a connection member with a length adjustment function. It is a rear view of a connection member with a length adjustment function. It is a right view of the connection member with a length adjustment function. It is a left view of the connection member with a length adjustment function. (A) is a bottom view of the connecting member with a length adjusting function, and (b) is a plan view of the connecting member with a length adjusting function. It is sectional drawing of each fastening member of a connection member with a length adjustment function. It is a figure for demonstrating the use condition of the connection member 50 with a length adjustment function.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted. The terms “upper” and “lower” correspond to the upper and lower parts in the vertical direction, respectively.

  In the present embodiment, the girder installation device 1 will be described as an example of a structure to which a connecting member with a length adjusting function is applied. First, a schematic configuration of the girder installation device 1 will be described with reference to FIG. FIG. 1 shows a girder installation device 1 including a support structure 100 using a connecting member with a length adjusting function according to the present embodiment from a lateral direction (front-rear direction, that is, a direction perpendicular to a bridge axis direction in a horizontal plane). FIG. The girder construction device 1 is a device that constructs the girder material 3 sequentially in the direction A with respect to the pier 2 constructed in advance. In the following description, the front in the direction A is referred to as “front”, and the rear is referred to as “rear”. As shown in FIG. 1, the girder installation device 1 includes a main body 10 including a front tower 4, a rear tower 6, a suspension girder 7 and a hand extender 8, and a traveling girder 9. In the girder installation device 1, the hanging girder 7, the hand extender 8, and the traveling girder 9 constitute members extending in the front-rear direction. In this embodiment, a girder construction structure for laying a rail on which a train travels will be described as an example. However, the girder installation device 1 can be applied to other than the girder construction structure for a train. Further, the present invention can also be applied to a girder installation device without a traveling girder.

  The front tower 4 and the rear tower 6 are portal frame bodies. The front tower 4 is installed on the front pier 2 among the piers 2 on which the girders 3 are installed. The front tower 4 is installed on the rear pier 2 so as to face the front tower 4 in the front-rear direction. The front tower 4 is separated from each other in the horizontal direction and extends in the vertical direction, and extends in the horizontal direction to connect the upper end of the leg column 21A and the upper end of the leg column 21B. A horizontal member (see FIG. 6). The lower ends of the pillars 21A and 21B are placed on the horizontal beam of the pier 2 (or the lower ends may float from the pier 2). The rear tower 6 also has the same configuration as the front tower 4.

  The suspension girder 7 extends in the front-rear direction, is disposed in the inner region of the front tower 4 and the inner region of the rear tower 6, and is spanned over the front tower 4 and the rear tower 6. The suspension girder 7 is supported on the front end side by the front tower 4 and supported on the rear end side by the rear tower 6, and is movable in the vertical direction. The suspension girder 7 has a function of suspending the girders 3. The suspension girder is supported by a hydraulic jack provided on the horizontal member of the rear tower 6 and a hydraulic jack provided on the horizontal member of the front tower 4, and is moved up and down by the hydraulic jack.

  The hand extender 8 extends on the pier 2 forward from the front tower 4. The traveling girder 9 extends in the front-rear direction and moves on the pier 2 in the front-rear direction via the hand extender 8. The traveling girder 9 is disposed in the inner region of the front tower 4, the inner region of the rear tower 6, and the inner side of the handrail machine 8.

  Next, with reference to FIGS. 2-4, the process of constructing the girder material 3 to the bridge pier 2 using the girder construction apparatus 1 is demonstrated. 2-4 is a schematic block diagram which shows a mode when the girder material 3 is constructed to the bridge pier 2 using the girder construction apparatus 1. FIG. Here, the case where the girders 3A are installed between the pier 2A and the pier 2B will be described as an example.

  As shown in FIG. 2 (a), a girder 3B has already been installed behind the pier 2A. The rear tower 6 is installed on the pier 2A, and the front tower 4 is installed on the pier 2B. The traveling girder 9 is installed at least between the pier 2A and the pier 2B, and extends further forward than the pier 2B. Behind the rear tower 6, preparation for transporting the newly installed girders 3A is made on the existing girders 3B. That is, the rear end of the girder 3 </ b> A is installed on the rear parent-cart 10 and the front end is installed on the front parent-cart 12. The rear parent car 11 can be separated into an upper child car 11a and a lower main car 11b. The front parent-child cart 12 can be separated into an upper child cart 12a and a lower parent cart 12b. The parent and child carts 11 and 12 can move along rails laid on the existing girders 3B.

  As shown in FIG. 2 (b), the suspended girder 7 is moved upward in order to secure a space for temporarily placing the newly installed girders 3 </ b> A on the traveling girder 9. As the parent and child carts 11 and 12 move forward, the newly installed girder 3A is carried forward. As shown in FIG. 2 (c), when the front parent-child cart 12 reaches the rear end of the traveling girder 9, the child cart 12a remains on the existing beam member 3B while supporting the newly installed beam member 3A. The vehicle leaves the master carriage 12b and moves onto the traveling girder 9. At this time, the newly installed girders 3 </ b> A pass through the inner region of the rear tower 6 and enter the region between the rear tower 6 and the front tower 4. When the newly installed girder 3A moves further forward, the rear parent / child cart 11 reaches the rear end of the traveling girder 9, and the child cart 11a supports the newly installed girder 3A while remaining on the existing girder 3B. The vehicle leaves the master carriage 11b and moves onto the traveling girder 9. As a result, the newly installed girder 3A is temporarily placed on the traveling girder 9 (the state shown in FIG. 3A).

  As shown in FIG. 3 (a), after the newly installed girders 3A are temporarily placed on the traveling girder 9, the girders 3A and the hanging girders 7 are connected, and the girders 3A become the hanging girders. 7 is suspended. After the connection is completed, the suspension girder 7 is moved upward while the newly installed girders 3A are suspended. After the newly installed girders 3A are lifted, the child carriages 11a and 12a move backward from the traveling girder 9 onto the parent carriages 11b and 12b and are connected to the parent carriages 11b and 12b.

  As shown in FIG. 3 (b), the newly installed girder 3 </ b> A is lifted and the child carriages 11 a and 12 a are lowered from the traveling girder 9, and then the traveling girder 9 is pulled out. The traveling girder 9 moves forward via the handbill 8 and is pulled out from the area between the pier 2A and the pier 2B. As shown in FIG. 3C, after the traveling girder 9 is pulled out from the region between the pier 2A and the pier 2B, the hanging girder 7 moves downward, so that the newly installed girders 3A are lowered. As shown in FIG. 4 (a), the rear end of the beam member 3A is installed on the bridge pier 2A, and the front end is installed on the bridge pier 2B, whereby the beam member 3A is interposed between the bridge pier 2A and the bridge pier 2B. Is built. When the installation of the beam member 3A is completed, the connection between the beam member 3A and the hanging girder 7 is released.

  As shown in FIG. 4 (b), the suspension girder 7 is moved upward, and the rear end portion of the suspension girder 7 is supported by the rear end carriage 13. Thus, the rear tower 6 is provisionally received by the hanging girder 7. As shown in FIG. 4C, the spreader 8, the front tower 4 and the rear tower 6 are moved forward using the traveling girder 9 as a guide. Thus, the next girder 3A is moved to a position where it is installed. Here, the next girder 3A is constructed between the pier 2C and the pier 2B, the front tower 4 is installed on the pier 2C, and the rear tower 6 is installed on the pier 2B.

  Next, the support structure 100 of the girder installation apparatus 1 of this embodiment is demonstrated with reference to FIGS.

  FIG. 5 is a view (side view) of the support structure 100 according to the present embodiment as seen from the lateral direction. FIG. 6 is a view (back view) of the support structure 100 according to the present embodiment as viewed from the rear to the front. FIG. 7 is a view of the support structure 100 according to this embodiment as viewed from above. However, in FIG. 7, the traveling girder is indicated by a two-dot chain line. FIG. 8A is an enlarged view of a portion indicated by VIIIa in FIG. FIG. 8B is an enlarged view of a portion indicated by VIIIb in FIG. In the following description, the front-rear direction (bridge axis direction), which is the direction in which the front tower 4 and the rear tower 6 face each other, is referred to as “front-rear direction D1” and is a direction perpendicular to the front-rear direction D1 in the horizontal plane. (Bridge axis orthogonal direction) will be described as “lateral direction D2”.

  The support structure 100 according to the present embodiment includes a fixed pier 2, a traveling girder 9 that can move in the front-rear direction D <b> 1 with respect to the pier 2, and a pedestal portion 24 (24 </ b> A, 24 </ b> B, 24 </ b> C) fixed on the pier 2. 24D), a support portion 26 that supports the traveling girder 9 so as to be movable in the front-rear direction D1 on the pedestal portion 24, and a front connection member 27 (27A, 27B, 27C, 27D) that couples the pier 2 and the traveling girder 9. ) And the rear connecting member 28 (28A, 28B, 28C, 28D). Moreover, the connecting member 50 with a length adjusting function according to the present embodiment is used for the rear connecting member 28. In the present embodiment, the connecting member 50 with a length adjusting function is applied to the rear connecting member 28. However, the connecting member 50 may be applied to the front connecting member 27 and applied to both the connecting members 27 and 28. Also good. The detailed description of the structure of the connecting member 50 with the length adjusting function will be described later.

  The lower surface 9a of the traveling girder 9 is provided with a rail portion 31 (31A, 31B, 31C, 31D) extending along the front-rear direction D1 and a bracket 32 for coupling the connecting members 27, 28 to the traveling girder 9. It has been. A plurality of rail portions 31 (four in this embodiment) are provided so as to be parallel to each other with a gap in the horizontal direction D2. In the present embodiment, it is assumed that rail portions 31A, 31B, 31C, and 31D are provided in order from the pedestal 21A to the pedestal 21B of the front tower 4 (see FIG. 6). The bracket 32 has a plate-like shape that protrudes downward from the lower surface 9 a of the traveling girder 9. The thickness direction of the bracket 32 coincides with the lateral direction D2. The bracket 32 has a pair of through-holes 32a penetrating in the lateral direction D2 so as to be inserted in the lateral direction D1 in order to insert pins (see FIG. 5). A plurality of brackets 32 (four in this embodiment) are provided between the rail portion 31A and the rail portion 31B so as to be arranged at a certain interval in the lateral direction D2. Further, a plurality of brackets 32 (four in this embodiment) are provided between the rail portion 31C and the rail portion 31D so as to be arranged at a certain interval in the lateral direction D2 (see FIG. 6). In addition, a set of a plurality of brackets 32 arranged in the lateral direction D2 in this way is provided at a plurality of locations with a predetermined interval in the front-rear direction D1 (see FIG. 5).

  In addition, at the corner between the lower surface 9 a and the rear end surface 9 b of the traveling girder 9, a retaining bracket 33 for connecting the rear side connecting member 28 to the traveling girder 9 is provided. The retaining bracket 33 has an L shape when viewed from the lateral direction D2 (the state shown in FIG. 5), and includes a lower side portion 33a fixed to the lower surface 9a of the traveling girder 9, and a rear end surface 9b of the traveling girder 9. And a rear side portion 33b fixed to the head. Thus, since the rear side part 33b is being fixed to the rear-end surface 9b of the traveling girder 9, the pulling force toward the front by the rear side connection member 28 can be reliably supported. The lower side portion 33a of the retaining bracket 33 has a plate-like portion 33c protruding downward. The thickness direction of the plate-like portion 33c coincides with the horizontal direction D2. The plate-like portion 33c has a through hole penetrating in the lateral direction D2 for inserting a pin. In addition, a plurality of (four in this embodiment) the retaining brackets 33 are provided so as to be arranged at a certain interval in the lateral direction D2. The position of each retaining bracket 33 in the lateral direction D2 may be set at substantially the same position as each rail portion 31A, 31B, 31C, 31D.

  The pedestal portion 24 is a substantially rectangular parallelepiped (or cubic) member provided on the upper surface side of the pier 2. In the figure, the pedestal 24 is shown as an integral member, but is configured by combining a plurality of sandals and the like. In the present embodiment, a plurality of (four in the present embodiment) pedestal portions 24 are provided on the pier 2 so as to be arranged at predetermined intervals in the lateral direction D2. In the present embodiment, it is assumed that pedestals 24A, 24B, 24C, and 24D are provided in order from the pedestal 21A to the pedestal 21B of the front tower 4 (see FIG. 6). The pedestal portions 24A, 24B, 24C, and 24D are disposed below the rail portions 31A, 31B, 31C, and 31D of the traveling girder 9, respectively. A support portion 26 is provided at the upper end of each pedestal portion 24A, 24B, 24C, 24D. The support portion 26 includes a height adjustment portion 34 and a guide portion 36 provided at the upper end of the height adjustment portion 34. The guide part 36 is for guiding the traveling girder 9 in the front-rear direction D <b> 1 via the rail part 31. For example, the guide part 36 is configured by a sandwich sander that sandwiches the rail part 31.

  Here, the base metal fitting 41 is fixed to the front end surface 24 a of the pedestal portion 24, and the mounting metal fitting 42 is fixed via the base metal fitting 41. The mounting bracket 42 is for fixing the front side connecting member 27 to the pier 2 via the pedestal portion 24. A base metal fitting 43 is fixed to the rear end surface 24 b of the pedestal portion 24, and a mounting metal fitting 44 is fixed via the base metal fitting 43. The mounting bracket 44 is for fixing the rear side connecting member 28 to the pier 2 via the pedestal portion 24.

  With reference to FIG. 8, the detailed structure of the base metal fitting 43 and the attachment metal fitting 44 is demonstrated. The base metal fitting 43 includes a rectangular plate-like fixed plate portion 46 that extends so as to be parallel to the rear end surface 24 b of the pedestal portion 24, and an insertion plate portion 47 that is inserted into the pedestal portion 24. The fixed plate portion 46 is fixed to the pedestal portion 24 by bolting or the like with the back surface 46b in contact with the rear end surface 24b of the pedestal portion 24. The insertion plate portion 47 has a rectangular plate shape extending from the back surface 46 b of the fixed plate portion 46 toward the pedestal portion 24 side (ie, the front side). Further, the thickness direction of the insertion plate portion 47 coincides with the lateral direction D2. As described above, since the pedestal portion 24 is configured by combining a plurality of sandles, a gap is formed between the sandals. The insertion plate portion 47 is inserted into such a gap. As shown in FIG. 8A, the insertion plate portion 47 is provided at a plurality of positions in the vertical direction (in the present embodiment, two positions on the upper stage side and the lower stage side). Further, as shown in FIG. 8B, the insertion plate portion 47 is provided at a plurality of positions (three positions in the present embodiment) with a predetermined interval in the lateral direction D2. Note that it is not necessary to provide the three insertion plate portions 47 on both the upper side and the lower side. For example, one insertion plate portion 47 is provided at the central position on the upper side, and in the lateral direction on the lower side. The insertion plate portions 47 may be provided one by one (two in total) on the outer side of D2. By providing such an insertion plate portion 47, even if forces in the vertical direction and the horizontal direction D <b> 2 act on the mounting bracket 44, the force can be supported by the insertion plate portion 47.

  The mounting bracket 44 includes a rectangular plate-shaped fixing plate portion 48 extending so as to be parallel to the surface 46 a of the fixing plate portion 46 of the base metal fitting 43, and a mounting plate portion 49 for connecting the rear side connecting member 28. I have. The fixing plate portion 48 is fixed to the base metal fitting 43 by bolting or the like with the back surface 48b in contact with the front surface 46a of the fixing plate portion 46 of the base metal fitting 43. The mounting plate portion 49 extends from the surface 48 a of the fixed plate portion 48 toward the side opposite to the pedestal portion 24 (that is, rearward). The mounting plate portion 49 has a thickness direction that coincides with the horizontal direction D2, and has a substantially triangular shape (the tip side is rounded) when viewed from the horizontal direction D2. Further, the attachment plate portion 49 is provided with a through hole for inserting a pin.

  Further, a support rod 51 for load transmission passes through the pedestal portion 24 in the front-rear direction. The support bar 51 is composed of a PC steel bar having a thread groove formed on the outer peripheral surface. The support bar 51 also penetrates the fixing plate portion 48 of the mounting bracket 44 and the fixing plate portion 46 of the base metal fitting 43. Further, a nut 52 is attached to a portion of the support bar 51 that protrudes to the outside from the fixed plate portion 48 of the mounting bracket 44.

  Although the rear mounting bracket 43 and the mounting bracket 44 have been described with reference to FIG. 8, the front mounting bracket 41 and the mounting bracket 42 have the same concept. Further, a nut is attached to a portion of the support bar 51 that protrudes from the mounting bracket 42 to the outside.

  As shown in FIGS. 5 and 7, the front connecting member 27 is disposed on the front side with respect to the pier 2, and is connected to the pier 2 and connected to the traveling girder 9 at each end. The front connecting member 27 includes a long member 67 and a joint member 53 connected to both ends of the long member 67. The front connection member 27 is attached in a state of extending obliquely upward from the attachment fitting 42 of the pedestal portion 24 toward one bracket 32 of the traveling girder 9. The joint member 53 on one end side of the long member 67 connects the one end side of the long member 67 and the mounting bracket 42 provided on the pier 2 side. The joint member 53 on the other end side of the long member 67 connects the other end side of the long member 67 and the bracket 32 provided on the traveling girder 9. In the state where tension is applied by connecting and sufficiently supporting the traveling girder 9 and the pier 2 (referred to as “connected state” in the following description), the direction in which the front side connecting member 27 extends, Let it be the “connection direction D3” of the front connection member 27. In the present embodiment, the connection direction D3 has a direction component in the front-rear direction D1 and a direction component in the up-down direction. Further, depending on the positional relationship between the mounting bracket 42 and the bracket 32, the connecting direction D3 also has a direction component in the lateral direction D2 (see FIG. 7). In the connected state, the long member 67 is in a state extending in the connecting direction D3. The long member 67 may be constituted by a rod-like member such as a total thread PC steel rod having a thread groove formed on the outer peripheral surface, and the end portion of the PC steel rod (round bar) is threaded. Alternatively, it may be constituted by a string-like member such as a chain or a wire, or a plate-like member such as a high-strength fiber rope or a steel strip. In addition, when using a full thread PC steel bar, in-situ cutting processing becomes easy by using a high-speed cutting machine etc. in order to make it a required length. Furthermore, there is no need to re-set the thread with a threading die like a mechanical screw. A disadvantage is that the nut length becomes long, but there is no problem in terms of size in this apparatus.

  The rear side connecting member 28 is disposed on the rear side with respect to the pier 2, and each end portion is connected to the pier 2 and is also connected to the traveling girder 9. The rear connecting member 28 includes a first long member 68 disposed on the pier 2 side, a second long member 69 disposed on the traveling girder 9 side, and one end side of the first long member 68. A joint member 53 connected to one end of the second long member 69, and a length adjusting mechanism 70 disposed between the long members 68 and 69. . The rear connection member 28 is attached in a state of extending obliquely upward from the attachment fitting 44 of the pedestal portion 24 toward one retaining fitting 33 of the traveling girder 9. The joint member 53 on one end side of the first long member 68 connects the one end side of the long member 68 to the mounting bracket 44 provided on the pier 2 side. The joint member 53 on one end side of the second elongate member 69 connects one end side of the elongate member 69 and the retaining bracket 33 provided on the traveling girder 9. In the connection state in which the traveling girder 9 and the bridge pier 2 are connected and sufficiently supported and tension is applied, the direction in which the rear connection member 28 extends is referred to as the “connection direction D4” of the rear connection member 28. " In the present embodiment, the connecting direction D4 has a direction component in the front-rear direction D1 and a direction component in the up-down direction. Further, depending on the positional relationship between the mounting bracket 44 and the retaining bracket 33, the connecting direction D4 also has a directional component in the lateral direction D2. In the connected state, the long members 68 and 69 are in a state of extending in the connecting direction D4 so that their centerlines substantially coincide with each other. The long members 68 and 69 may be formed of a rod-like member such as a total thread PC steel rod having a thread groove formed on the outer peripheral surface, and the end of the PC steel rod (round bar) is threaded. Or a string-like member such as a chain or wire, or a plate-like member such as nylon sling (registered trademark).

  The structure of the joint member 53 will be described with reference to FIG. A so-called universal joint is used as the joint member 53. The joint member 53 is rotatable around two axes that are perpendicular to each other. As shown in FIG. 8, the joint member 53 is connected to the mounting bracket 44 via a pin 57 and a universal bracket 54, and is connected to a first elongate member 68 and to the universal bracket 54 via a pin 58. And a receiving bracket 56 to be connected. The universal metal fitting 54 has a base end portion 54a rotatably connected to the attachment metal fitting 44 by a pin 57 extending in the lateral direction D2. The base metal part 56a is connected to the front end part 54b of the universal metal part 54 so as to be rotatable by a pin 58 which is perpendicular to the pin 57 and extends perpendicularly to the first elongate member 68. Has been. The first elongate member 68 is connected to the tip end portion 56 b of the receiving metal fitting 56. As a result, the first elongate member 68 can freely rotate in the direction having the direction component in the lateral direction D2 and the direction component in the vertical direction with respect to the mounting bracket 44. Note that, as shown in FIG. 8B, the metal fitting 56 and the first long member 68 are slightly inclined with respect to the front-rear direction D1, and therefore the metal fitting shown in FIG. 56 and the first elongate member 68 are actually shown in a state in accordance with the inclination. However, in FIG. 8A, in order to facilitate understanding of the structure, the receiving bracket 56 and the first long member 68 are viewed from the viewpoint V2 (perpendicular to the connecting direction D4) in FIG. It shows the state as seen. For the same purpose, in FIG. 8B, in order to facilitate the understanding of the structure, the universal fitting 54, the receiving fitting 56, and the first long member 68 are viewed from the viewpoint V1 in FIG. The state seen from (perpendicular to the connecting direction D4) is shown. 5 and 7, the display method having the same meaning is adopted for the front side connecting member 27 and the rear side connecting member 28.

  Specifically, the universal bracket 54 is fixed to the pair of sandwiching plate portions 61 and 61 facing in parallel to the lateral direction D1 so as to sandwich the mounting plate portion 49 of the mounting bracket 44, and the sandwiching plate portions 61 and 61. And an attachment plate portion 62. The sandwiching plate portions 61 and 61 have a shape in which one end side of the rectangle is formed in a semicircular shape when viewed from the lateral direction D <b> 2, and the semicircular portions 61 a and 61 a are the mounting plate portions 49 of the mounting bracket 44. Concatenated with The semicircular portions 61a, 61a of the sandwiching plate portions 61, 61 are provided with through holes communicating with the through holes of the mounting plate portion 49 of the mounting bracket 44, and pins 57 are inserted into these through holes. Is done. The pin 57 may be provided with a handle so that the operator can easily carry it. The mounting plate portion 62 is formed so as to be perpendicular to the clamping plate portions 61, 61. The angular portions 61b, 61b on the front end side of the clamping plate portions 61, 61 (on the opposite side to the semicircular portions 61a, 61a) Part). The mounting plate portion 62 has a shape in which one end side of the rectangle is formed in a semicircular shape when viewed from the viewpoint V1 shown in FIG. 8A, and the semicircular portion 62a is connected to the receiving metal piece 56. The The semicircular portion 62a is provided with a through hole. The angular portion 61 b on the other end side of the sandwiching plate portions 61, 61 is fixed to the angular portion 62 b of the mounting plate portion 62.

  The receiving metal piece 56 includes a pair of holding plate parts 63 and 63 facing in parallel so as to hold the mounting plate part 62 of the universal metal piece 54 and a fixing part 64 provided between the holding plate parts 63 and 63. . The sandwiching plate portions 63 and 63 have a shape in which one end side of a rectangle is formed in a semicircular shape when viewed from the viewpoint V1 shown in FIG. 8A, and the semicircular portions 63a and 63a are universal metal fittings. 54 attachment plate portions 62 are connected. The semicircular portions 63a and 63a of the sandwiching plate portions 63 and 63 are respectively provided with through holes that communicate with the through holes of the mounting plate portion 62 of the universal bracket 54, and pins 58 are inserted into these through holes. Is done. The pin 58 may be provided with a handle so that the operator can easily carry it. The bracket 56 and the first long member 68 are connected to the angular portions 63b and 63b (the portions opposite to the semicircular portions 63a and 63a) on the other end side of the holding plate portions 63 and 63. The fixing | fixed part 64 for doing is provided. The fixing portion 64 is configured to form a space in which the nut 66 attached to the end of the first long member 68 can be placed, and has a through-hole 64a through which the first long member 68 is inserted. A wall portion 64b that has a nut 66 to support and generate a reaction force is provided.

  As described above, the structure of the joint member 53 that connects the mounting bracket 44 and the first long member 68 has been described with reference to FIG. The joint member 53 for connecting the long member 69, the joint member 53 for connecting the mounting bracket 42 and the long member 67, and the joint member 53) for connecting the bracket 32 and the long member 67 are also the same. The structure of is applied.

  Next, the structure in the vicinity of the length adjusting mechanism 70 in the rear side connecting member 28, that is, the connecting member 50 with the length adjusting function will be described with reference to FIGS. In the following description, XYZ coordinates are set for the connecting member 50 with a length adjusting function. FIG. 9 is a perspective view of the connecting member 50 with a length adjusting function. FIG. 10 is a front view of the connecting member 50 with a length adjusting function (viewed in the negative Y-axis direction). FIG. 11 is a rear view of the connecting member 50 with a length adjusting function (viewed in the positive Y-axis direction). FIG. 12 is a right side view of the connecting member 50 with a length adjusting function (viewed in the negative direction of the X axis). FIG. 13 is a left side view of the connecting member 50 with a length adjusting function (viewed in the positive direction of the X axis). 14A is a bottom view of the connecting member 50 with a length adjusting function (viewed in the positive direction of the Z axis), and FIG. 14B is a plan view of the connecting member 50 with a length adjusting function. It is a figure (the figure seen toward the Z-axis negative direction). FIG. 15 is a cross-sectional view of each fastening member 71, 72, 73 of the connecting member 50 with a length adjusting function. FIG. 16 is a diagram for explaining a usage state of the connecting member 50 with a length adjusting function. Note that the Z-axis extends parallel to the connection direction D4. The X axis extends perpendicular to the Z axis. The Y axis extends perpendicular to the Z axis and the X axis. Moreover, in FIGS. 9-16, the centerline CL is set with respect to the connection member 50 with a length adjustment function. The center line CL is a reference line extending in the connection direction D4. On the center line CL, the center line of the first long member 68 and the center line of the second long member 69 in the connected state are arranged. The

  The length adjusting mechanism 70 is a mechanism that adjusts the distance between the first elongate member 68 and the second elongate member 69 to adjust the overall length of the connecting member 50 with a length adjusting function. A first fastening member 71 disposed on the other end side of the first long member 68; a second fastening member 73 disposed on the other end side of the second long member 69; A third fastening member 72, a first fastening member 71, and a second fastening member disposed between the first fastening member 71 and the second fastening member 73 in the Z-axis direction (connection direction D4). And a pair of intermediate long members 74 and 74 for connecting the fastening member 73 to each other.

  The first fastening member 71 is a metal member that extends in the X-axis direction. When viewed from the Y-axis direction, the first fastening member 71 has a line-symmetric shape with respect to the center line CL. Even when viewed from the X-axis direction, the first fastening member 71 has a line-symmetric shape with respect to the center line CL. Specifically, the first fastening member 71 has a shape in which an overhanging portion 86 projecting in the negative direction of the Z-axis is provided at a portion in the vicinity of the center line CL with respect to a member having a rectangular plate shape as a whole. doing. When viewed from the Y-axis direction, the overhang portion 86 is formed in a trapezoidal shape, is formed in the vicinity of the center line CL, and is formed on the tip surface 71a perpendicular to the Z-axis and on both outer sides of the tip surface 71a in the X-axis direction. Inclined surfaces 71b and 71b. Further, seat surfaces 71c and 71c perpendicular to the Z axis are formed on both outer sides in the X axis direction than the inclined surface 71b. In addition, a flat surface 71d facing the tip surface 71a and the seating surfaces 71c and 71c in parallel with each other is formed on the opposite side of the projecting portion 86. End surfaces 71e and 71e formed on both end sides in the X-axis direction of the first fastening member 71 are formed in a planar shape perpendicular to the X-axis. Side surfaces 71f and 71f formed on both end sides in the Y-axis direction of the first fastening member 71 are formed in a planar shape perpendicular to the Y-axis. A handle 84 for carrying by an operator is attached to the side surfaces 71f and 71f. However, the shape and position of the handle 84 are not particularly limited, and may be changed as appropriate.

  The second fastening member 73 is a metal member that extends in the X-axis direction. When viewed from the Y-axis direction, the second fastening member 73 has a line-symmetric shape with respect to the center line CL. Even when viewed from the X-axis direction, the second fastening member 73 has a line-symmetric shape with respect to the center line CL. Specifically, the second tightening member 73 has a shape in which an overhanging portion 88 projecting in the negative direction of the Z-axis is provided in a portion near the center line CL with respect to a member having a rectangular plate shape as a whole. doing. When viewed from the Y-axis direction, the overhang portion 88 is formed in a trapezoidal shape, is formed in the vicinity of the center line CL, and is formed on the tip surface 73a perpendicular to the Z-axis and on both outer sides of the tip surface 73a in the X-axis direction. Inclined surfaces 73b and 73b. Further, seat surfaces 73c and 73c perpendicular to the Z axis are formed on both outer sides in the X axis direction than the inclined surface 73b. Further, on the opposite side of the overhang portion 88, a front end surface 73a and a flat surface 73d that faces the seat surfaces 73c and 73c in parallel are formed over the entire surface. End surfaces 73e and 73e formed on both end sides in the X-axis direction of the second fastening member 73 are formed in a planar shape perpendicular to the X-axis. Side surfaces 73f and 73f formed on both end sides in the Y-axis direction of the second fastening member 73 are formed in a planar shape perpendicular to the Y-axis. A handle 84 for carrying by the operator is attached to the side surfaces 73f and 73f. However, the shape and position of the handle 84 are not particularly limited, and may be changed as appropriate.

  The third fastening member 72 is a metal member that extends in the X-axis direction. When viewed from the Y-axis direction, the third fastening member 72 has a line-symmetric shape with respect to the center line CL. Even when viewed from the X-axis direction, the third fastening member 72 has a line-symmetric shape with respect to the center line CL. Specifically, the third tightening member 72 has a shape in which an overhanging portion 87 projecting in the positive direction of the Z-axis is provided at a portion near the center line CL with respect to the member having a rectangular plate shape as a whole. doing. When viewed from the Y-axis direction, the overhang portion 87 is formed in a trapezoidal shape, is formed in the vicinity of the center line CL, and is formed on the tip surface 72a perpendicular to the Z-axis and on both outer sides of the tip surface 72a in the X-axis direction. Inclined surfaces 72b and 72b. Further, seat surfaces 72c and 72c perpendicular to the Z axis are formed on both outer sides in the X axis direction than the inclined surface 72b. Further, on the opposite side of the projecting portion 88, a front end surface 72a and a flat surface 72d facing the seating surfaces 72c and 72c in parallel are formed over the entire surface. End surfaces 72e, 72e formed on both end sides in the X-axis direction of the second fastening member 72 are formed in a planar shape perpendicular to the X-axis. Side surfaces 72f and 72f formed on both end sides in the Y-axis direction of the second fastening member 72 are formed in a planar shape perpendicular to the Y-axis. A handle 84 for carrying by the operator is attached to the side surfaces 72f and 72f. However, the shape and position of the handle 84 are not particularly limited, and may be changed as appropriate.

  When viewed from the Z-axis direction, the fastening members 71, 72, and 73 have shapes and arrangements that are substantially the same shape. That is, the side surfaces 71f, 72f, 73f and the end surfaces 71e, 72e, 73e have shapes and arrangements that substantially match when viewed from the Z-axis direction. However, some deviation is allowed in actual use.

  As shown in FIG. 15, the positions corresponding to the tip surfaces 71a, 72a, 73a of the overhang portions 86, 87, 88 of the fastening members 71, 72, 73 are in the Z-axis direction with the center line CL as the center. Circular through-holes 91, 93, 96 penetrating therethrough are formed. As viewed from the Z-axis direction, each of the through holes 91, 93, and 96 is formed in a shape and a position that substantially match. In addition, circular through holes 92, 94, and 97 penetrating in the Z-axis direction are formed at positions corresponding to the seating surfaces 71 c, 72 c, and 73 c on both sides of each tightening member 71, 72, and 73. When viewed from the Z-axis direction, the through holes 92, 94, and 97 on both sides are formed in a shape and a position that substantially coincide with each other. Note that one through hole 92, 94, 97 in the X-axis direction is formed in a position and shape that is line-symmetric with respect to the other through hole 92, 94, 97 and the center line CL.

  A first long member 68 is inserted through the through hole 91 at the center position of the first tightening member 71. The first elongate member 68 is inserted into the through hole 93 at the center position of the third tightening member 72. The other end side of the first elongate member 68 is connected to the third fastening member 72. In the present embodiment, the first elongate member 68 and the third fastening member 72 are bolt portions 68a (this embodiment) configured by forming screw grooves on the outer peripheral surface of the first elongate member 68. In the embodiment, it is formed in the entire area of the long member 68, but it may be formed only in a necessary portion), and from the front end surface 72a of the third fastening member 72 in the first long member 68. Also, it can be connected by a fastening structure by a reaction force nut 76 attached to the protruding portion. In the fastening structure, when a tension acts on the first elongate member 68, the reaction force nut 76 is supported by the distal end surface 72a of the third fastening member 72 to generate a reaction force. Thus, the first elongate member 68 and the third fastening member 72 are connected.

  A second long member 69 is inserted through the through hole 96 at the center position of the second tightening member 73. Further, the other end side of the second long member 69 is connected to the second fastening member 73. In the present embodiment, the second long member 69 and the second fastening member 73 are formed by forming a screw groove on the outer peripheral surface of the second long member 69 (this embodiment). In the embodiment, it is formed in the entire area of the long member 69, but it may be formed only in a necessary portion), and in the second long member 69 from the front end surface 73a of the second fastening member 73. Also, it can be connected by a fastening structure by a reaction force nut 77 attached to the protruding portion. In the fastening structure, when a tension acts on the second elongate member 69, the reaction force nut 77 is supported by the distal end surface 73a of the second fastening member 73 and a reaction force is generated. By doing so, the second elongated member 69 and the second fastening member 73 are connected.

  Intermediate long members 74 and 74 are inserted into the through holes 92, 94, and 97 on both sides of the fastening members 71, 72, and 73, respectively. Although the intermediate long members 74 and 74 are not particularly limited, it is preferable to use a rod-shaped member such as a PC steel rod, as compared with a string-shaped member such as a wire, because the length adjustment work can be easily performed. The intermediate long members 74 and 74 are connected to the first tightening member 71 and the second tightening member 73. In the present embodiment, the intermediate long member 74 and the first fastening member 71 are bolt portions 74a (in this embodiment, formed by forming screw grooves on the outer peripheral surface of the intermediate long member 74. The intermediate long member 74 is formed in the entire region, but may be formed only in a necessary portion), and in the intermediate long members 74 and 74, from the seat surfaces 71c and 71c of the first fastening member 71. Also, it can be connected by a fastening structure with reaction force nuts 78 and 78 attached to the protruding portion. In the fastening structure, when tension is applied to the intermediate long members 74, 74, the reaction force nuts 78, 78 are supported by the seat surfaces 71 c, 71 c of the first fastening member 71 to generate a reaction force. In this state, the intermediate long members 74 and 74 and the first fastening member 71 are connected. Further, the intermediate long members 74 and 74 and the second tightening member 73 include a bolt portion 74a of the intermediate long members 74 and 74 and a plane of the second tightening member 73 in the intermediate long members 74 and 74. It can be connected by a fastening structure with reaction force nuts 79 attached to a portion protruding from 73d. In the fastening structure, when tension is applied to the intermediate long members 74 and 74, the reaction force nuts 79 and 79 are supported by the flat surface 73d of the second fastening member 73 and the reaction force is generated. By doing so, the intermediate long members 74 and 74 and the second fastening member 73 are connected. It should be noted that rattling prevention nuts 83, 83 may be attached to the intermediate long members 74, 74 on the opposite side of the second tightening member 73 with respect to the reaction force nuts 79, 79.

  At least during the length adjustment, the third tightening member 72 is movable relative to the intermediate long members 74 and 74. That is, during the length adjustment, the third fastening member 72 is relatively guided along the Z-axis direction (that is, the connecting direction D4) while being guided by the intermediate long members 74 and 74 through the through holes 94 and 94. Can be moved to. On the other hand, after the length adjustment is completed, the intermediate long members 74 and 74 and the third fastening member 72 are the third bolts 74a of the intermediate long members 74 and 74 and the intermediate long members 74 and 74. The fastening member 72 can be connected by a fastening structure with reaction force nuts 81, 81 attached to a portion protruding from the flat surface 72 d of the fastening member 72. In the fastening structure, when tension is applied to the intermediate long members 74, 74, the reaction force nuts 81, 81 are supported by the flat surface 72 d of the third fastening member 72 and the reaction force is generated. By doing this, the intermediate long members 74 and 74 and the third fastening member 72 are connected. It should be noted that rattling prevention nuts 82, 82 may be attached to the intermediate long members 74, 74 on the opposite side of the third tightening member 72 with respect to the reaction force nuts 81, 81.

  Between the first tightening member 71 and the third tightening member 72, a jack disposition portion 99 is formed that can dispose a jack that changes the position of the third tightening member 72 during length adjustment. Has been. The jack placement portion 99 is formed by a space between the first fastening member 71 and the third fastening member 72. Moreover, the jack arrangement | positioning part 99 may have a mechanism for hold | maintaining a position while arrange | positioning a jack. For example, a flange for arranging a jack on the flat surface 71d of the first tightening member 71 or the flat surface 72d of the third tightening member 72 may be provided. Or you may provide the structure for screwing a jack in each plane 71d and 72d.

  Next, with reference to FIG. 16, the procedure of the length adjustment method of the connection member 50 with a length adjustment function is demonstrated. First, one end side of the first long member 68 is connected to the mounting bracket 44 via the joint member 53, and one end side of the second long member 69 is connected to the retaining bracket 33 via the joint member 53. . The pier 2 and the traveling girder 9 are connected by the front side connecting member 27. Moreover, the approximate position adjustment of each fastening member 71, 72, 73 is performed. For example, the distance between the fastening members 71 and 72 is adjusted so that the jack 110 can be disposed. Along with this, the tightening amounts of the reaction force nuts and the backlash prevention nuts are also adjusted.

  As shown in FIG. 16A, the jack 110 is placed on the jack placement portion 99. In the present embodiment, a pair of jacks 110 and 110 are disposed with the first long member 68 interposed therebetween. Note that the backlash prevention nuts 82 are moved away to a position where they do not interfere with the moving third tightening member 72 by adjusting the length. Next, as shown in FIG. 16 (b), by extending the rod portions 111, 111 of the jacks 110, 110, the third fastening member 72 is moved relatively to the second fastening member 73 side. Then, the first elongate member 68 is pulled closer to the second elongate member 69 side. At this time, a force is applied to the first tightening member 71 so as to be pushed to the opposite side (Z-axis negative direction) of the third tightening member 72, but between the reaction force nuts 78 and 78. It is supported by the reaction force generated in Further, the reaction force exerts a force on the intermediate long members 74, 74 that is pulled in the negative direction of the Z-axis, but the second tightening member 73 (the second long member 69 is used for reaction force). It is supported by the reaction force generated between the reaction force nuts 79 and 79 and the reaction force nuts 79 and 79.

  The jacks 110 and 110 are stopped at the timing when the looseness and tension of the connecting member 50 with the length adjusting function become appropriate (states to be obtained), and as shown in FIG. 16C, the reaction force nuts 81 and 81 are stopped. Is brought into contact with the third fastening member 72. As a result, the third fastening member 72 and the intermediate long members 74 and 74 are connected to each other, and the state in which tension is applied to the long members 68 and 69 is maintained. Further, by tightening the backlash prevention nut 82 to the tightening member 72, it is possible to prevent the tightening member 72 from moving (rattle) when a force is applied in a direction opposite to the tension. The jack 110 can be easily removed by contracting the rod portion 111 after tightening the reaction force nut 81. As described above, the bridge pier 2 and the traveling girder 9 are connected and fixed in a state where sufficient tension is applied. In addition, when releasing the connection by the connecting member 50 with the length adjusting function, the procedure is not particularly limited, but it is easily performed by performing the opposite procedure described above or, if possible, loosening the reaction force nut 81. be able to.

  Here, the force transmission mode when the traveling girder 9 is supported by the support structure 100 according to the present embodiment will be described with reference to FIG. 5. When a force that moves rearward relative to the pier 2 acts on the traveling girder 9, the movement of the traveling girder 9 is restricted by the pier 2 supporting the force via the rear connecting member 28. Can do. Since the rear connection member 28 extends obliquely upward, a force having a direction component in the front-rear direction D1 and a direction component in the vertical direction acts on the mounting bracket 44 connected to the rear connection member 28. . The force of the directional component in the vertical direction can be supported by the pedestal portion 24 via the insertion plate portion 47 (see FIG. 8) of the base metal fitting 43. Further, the force of the direction component in the front-rear direction D1 is transmitted from the mounting bracket 44 to the support bar 51 via the nut 52 (see FIG. 8). The support bar 51 penetrates the pedestal portion 24 and is fixed to the opposite front end surface 24 a via a mounting bracket 42 and a nut 52. Therefore, the force of the direction component in the front-rear direction D1 is supported by the front end surface 24a of the pedestal portion 24. On the other hand, when a force that moves to the front side with respect to the pier 2 acts on the traveling girder 9, the pier 2 supports the force via the front side connecting member 27, thereby restricting the movement of the traveling girder 9. Can do. Regarding the transmission of force, as in the case of the rear connection member 28, the force of the directional component in the vertical direction is supported by the pedestal portion 24 via the insertion plate portion 47 of the base metal fitting 43, and the force of the directional component in the front-rear direction D1 is The rear end surface 24b of the base 24 is supported.

  When the support structure 100 according to the present embodiment is applied, for example, the traveling girder 9 is pulled back to the rear side from the state shown in FIG. 4B (in order to install the connecting members 27 and 28, the figure on the pier 2. This is because the protruding of the traveling girder 9 as shown in FIG. 5 is necessary). Next, the traveling girder 9 is jacked up to deposit the weight of the main body 10 in the traveling girder 9 and the rear parent-child cart 11. In this state, the connecting members 27 and 28 are connected, the support structure 100 is assembled, and the traveling girder 9 and the pier 2 are temporarily fixed. In this state, the main body 10 moves along the traveling girder 9. For example, as shown in FIGS. 4 (b) and 4 (c), when the main body portion 10 of the girder installation device 1 moves along the traveling girder 9, a propulsion jack (not shown) provided in the hand extender 8 is used. The traveling girder 9 is gripped and moved by taking a reaction force from the traveling girder 9. At this time, the traveling girder 9 is subjected to a force that moves rearward with respect to the pier 2, but can be supported as described above by the rear connecting member 28 of the support structure 100. It is possible to reliably prevent 9 from shifting with respect to the pier 2. In addition, since it is connected not only by the rear connecting member 28 but also by the front connecting member 27, even if the main body 10 needs to move rearward, it will move forward with respect to the pier 2. The traveling girder 9 can be supported. Further, by supporting both the front and rear directions, the earthquake resistance can be improved. If it will be in the state of FIG.4 (c), the connection members 27 and 28 will be removed and it will transfer to the next girder construction process.

  As described above, according to the connecting member 50 with the length adjusting function according to the present embodiment, the intermediate long members 74 and 74 are connected at least between the first fastening member 71 and the second fastening member 73. It extends in the direction D4 and is connected to the first fastening member 71 and the second fastening member 73. Further, the third fastening member 72 disposed between the first fastening member 71 and the second fastening member 73 is movable relative to the intermediate long members 74 and 74. . Accordingly, the first elongate member 68 is connected to the third tightening member 72 on the other end side, and the second elongate member 69 is connected to the second tightening member 73 on the other end side. In this case, the first elongate member 68 and the second elongate member 69 can be brought closer to each other by bringing the third fastening member 72 closer to the second fastening member 73. Thereby, the length as the whole connecting member 50 with a length adjustment function can be shortened, and the traveling girder 9 and the bridge pier 2 can be reliably fixed in a state where sufficient tension is generated. Further, such a secure fixing is a simple structure by the fastening members 71, 72, 73 and the intermediate long members 74, 74, and an easy operation to move the third fastening member 72. Can be easily performed. As described above, when the structures are temporarily fixed to each other, the fixing can be easily and reliably performed.

  Furthermore, the length adjusting function by the connecting member 50 with the length adjusting function according to this embodiment is based on the looseness of the connecting member 50 including looseness (play) between the nut and the steel bar screw and the loose part of the periphery of the fixed part in advance. It is also possible to tighten by the necessary force, and it is possible to eliminate the initial minute displacement deformation / displacement at which the force starts to act on the connecting member 50. In other words, it is possible to introduce prestress.

  In addition, since the connecting member 50 with the length adjusting function can be separated into individual parts and the fixing structure is simple, the operator can easily perform the attaching / detaching work, and each part can be attached to the operator by the operator. It can be easily transported by force. In this way, the structure is extremely suitable for temporary fixation at the work site.

  Further, in the connecting member 50 with the length adjusting function according to the present embodiment, the fastening members 71, 72, 73 and the intermediate long members 74, 74 are bolts formed on the intermediate long members 74, 74. It can be connected by the fastening structure by the part 74a and a nut. Thereby, the connection and the release of the connection can be easily performed. In addition, it is possible to easily adjust the position between the fastening members 71, 72, 73 along the intermediate long members 74, 74.

  Further, in the connecting member 50 with the length adjusting function according to the present embodiment, the fastening structure has reaction force nuts 78, 81, and 79 that apply reaction force to the fastening members 71, 72, and 73. Good. Accordingly, the intermediate long members 74 and 74 and the fastening members 71, 72, and 73 can be coupled using the reaction force. Further, the fastening structure includes rattling prevention nuts 82 and 83 that sandwich the fastening members 72 and 73 between the reaction force nuts 78 and 79. As a result, the intermediate long members 74 and 74 and the fastening members 72 and 73 can be reliably connected.

  Further, in the connecting member 50 with the length adjusting function according to the present embodiment, the position of the third tightening member 72 is changed between the first tightening member 71 and the third tightening member 72. The jack arrangement | positioning part 99 which can arrange | position the jack 110 is formed. As a result, the jack 110 can be arranged in the jack arrangement portion 99, and the third fastening member 72 can be easily moved relative to the intermediate long members 74, 74 by extending the jack 110. The length can be adjusted. If the jack 110 does not require the introduction of a large prestressing force, a combination of a mechanical screw jack for exchanging car tires, a simple hydraulic feeder with a handle that moves up and down, and a small hydraulic jack It is possible to cope with it.

  In the connecting member 50 with a length adjusting function according to the present embodiment, a pair of shafts (vertical shafts) perpendicular to each other are provided on one end side of the first long member 68 and one end side of the second long member 69. A joint member 53 that is rotatable around the pins 57, 58) is provided. As a result, at the connecting portion between the pier 2 and the first elongate member 68 and between the traveling girder 9 and the second elongate member 69, not only the rotation about one axis but also the position. It can also be rotated around an axis perpendicular to the axis. That is, not only the vertical position adjustment but also the horizontal direction D2 adjustment is possible. Accordingly, it is possible to three-dimensionally adjust the connection position of the connecting member 50 with the length adjusting function with respect to each structure.

  Note that, for example, turnbuckles and bridge drop prevention devices for adjusting the length of braces of building structures are conventionally known as support structures, but these are all used in the main structure. Therefore, it is not intended to be used so that it can be temporarily attached and detached and applied to another place. The connecting member 50 with a length adjusting function according to the present embodiment can easily and reliably apply tension by attaching and detaching with bolts and nuts and spreading with a jack. Thus, the connecting member 50 with a length adjusting function according to the present embodiment can be used extremely optimally for temporary fixing (temporary fixing) between structures. Further, for example, a structure in which the first long member 68 and the second long member 69 are eccentrically inserted into a member having a pair of through holes arranged side by side and fixed with a nut is adopted. In this case, bending acts on the fixing portion and the screwing portion in addition to the axial tensile force. As in this embodiment, the structure is difficult to apply to a connecting member that requires a high axial tensile force. On the other hand, in the connecting member 50 with the length adjustment function according to the present embodiment, the first long member 68 and the second long member 69 are both disposed on the center line CL, and the members are located between the members. Bending does not work. Therefore, the present invention can be applied to a portion that requires a high axial tensile force.

  The present invention is not limited to the embodiment described above.

  For example, the number and position of the connecting members 27 and 28 are not particularly limited, and may be appropriately set according to the girder installation device. When the connecting members 27 and 28 interfere with the handbill 8 or the like during the movement of the girder installation device, the connecting members 27 and 28 can be rearranged sequentially. Moreover, the connection position of the traveling girder 9 and the connecting members 27 and 28 is not particularly limited. Further, the connecting members 27 and 28 may be directly connected to the pier 2 without using the pedestal portion 24.

  Further, the configuration of the length adjusting mechanism 70 is not limited, and any structure can be adopted as long as the gist of the present invention is not exceeded.

  For example, the first elongate member 68 is connected to the first fastening member 71 on the other end side, and the second elongate member 69 is inserted on the other end side (through the second fastening member 73). And may be connected to a third fastening member. In this case, the first long member 68 and the second long member 69 can be brought closer by bringing the third fastening member 72 closer to the first fastening member 71. Further, between the second tightening member 73 and the third tightening member 72, a jack disposition portion 99 is formed in which the jack 110 that changes the position of the third tightening member 72 can be disposed. Good.

  Further, a pair of intermediate long members 74 may be provided. Further, the connection between the intermediate long member 74 or the long members 68 and 69 and the fastening members 71, 72, and 73 may not be performed by a fastening structure. For example, a through-hole penetrating in the radial direction may be provided in the long member, and a pin may be inserted into the through-hole (the pin is caught on the seating surface or flat surface of the fastening members 71, 72, 73). Moreover, it is good also as length adjustment being possible by forming such a through-hole in multiple places in a longitudinal direction. Further, as long as the strength can be ensured, the fastening members 71, 72, 73 may be directly provided with screw holes, and the long members 68, 69, 74 may be directly screwed. In addition, a connecting structure member such as a commercially available lever block (registered trademark) or a chain block may be employed. However, when the load resistance is small, it is necessary to install a large number of connecting members. In other words, this connecting member can be installed relatively easily with a high load bearing capacity, and can provide not only the length adjustment but also the necessary prestressing force (tensioning force).

  Moreover, in the above-mentioned embodiment, the 1st fastening member 71, the 2nd fastening member 73, and the intermediate | middle elongate member 74 are connected by the method which can adjust a connection position by employ | adopting a fastening structure. However, it may be fixed in a structure that cannot be adjusted. For example, as long as the strength can be secured, the wire may be folded and fixed with a fastening clip or the like if it is welding or a wire.

  Moreover, although the through-hole which penetrates a long member and an intermediate | middle elongate member was provided in the connection part of each fastening member and an elongate member (and intermediate | middle elongate member), it may not be a through-hole. For example, the groove part which opens in a side surface or an end surface may be sufficient. Also, the end of the long member or intermediate long member is abutted against the outer surface of the fastening member, or inserted into a concave hole (not penetrating) formed in the fastening member, and fixed by welding or the like. Also good.

  As described above, the application of the connecting member has been described by taking as an example securing the reaction force opposite to the moving direction when moving the girder installation device and improving the earthquake resistance in the bridge axis direction. As other applications, it is also possible to apply seismic fixing of the girder erection device in the direction perpendicular to the bridge axis, and to fix the girder erection device and members so that they do not slide out on an ascending or descending slope. It can also be used for citations rather than fixed. In addition, the application object of this connection member is not limited to a girder installation apparatus, It can apply in every scene when connecting one structure and another structure.

DESCRIPTION OF SYMBOLS 1 ... Girder construction apparatus, 2 ... Bridge pier, 3 ... Girder material, 4 ... Front tower, 6 ... Rear tower, 7 ... Suspension girder, 8 ... Hand extender, 9 ... Travel girder, 27 ... Front side connection member, 28 ... Rear connecting member 50 ... Connecting member with length adjusting function, 53 ... Joint member, 68 ... First long member, 69 ... Second long member, 71 ... First tightening member, 72 ... First 3 fastening members, 73 ... second fastening member, 74 ... intermediate long member, 76, 77, 78, 79 ... nut for reaction force, 82, 83 ... nut for rattling, 99 ... jack arrangement part.

Claims (5)

A support structure using a connecting member with a length adjusting function for connecting the first structure and the second structure ,
The first structure is a pier;
The second structure is a traveling girder of a girder installation device movable in the front-rear direction with respect to the pier,
The traveling girder is connected to the pier by a front connecting member arranged on the front side of the pier, and a rear connecting member arranged on the rear side,
The connecting member with the length adjusting function is used for at least one of the front connecting member and the rear connecting member ,
The connecting member with the length adjusting function is
A first elongated member having one end side connected to the first structure and extending in the connecting direction;
A second elongate member having one end side connected to the second structure and extending in the connecting direction;
A first fastening member disposed on the other end side of the first long member;
A second fastening member disposed on the other end side of the second elongated member;
A third fastening member disposed between the first fastening member and the second fastening member in the connecting direction;
At least a pair of intermediate members extending in the connecting direction between at least the first fastening member and the second fastening member and connected to the first fastening member and the second fastening member. A long member,
The first long member is connected to the third fastening member on the other end side, and the second long member is connected to the second fastening member on the other end side, Alternatively, the first elongate member is connected to the first fastening member on the other end side, and the second elongate member is connected to the third fastening member on the other end side. And
The third fastening member is movable relative to the intermediate long member;
A support structure capable of adjusting a length by changing a position of the third fastening member with respect to the intermediate long member . In the connecting member with a length adjusting function , at least one of the first, second and third tightening members and the intermediate long member are formed on the intermediate long member. The support structure according to claim 1, wherein the support structure is connectable by a fastening structure including a bolt part and a nut. In the connecting member with a length adjusting function, the fastening structure may include any one of the fastening members between a reaction force nut that applies a reaction force to any of the fastening members and the reaction force nut. The support structure according to claim 2, further comprising a backlash prevention nut sandwiching the attachment member. In the connecting member with the length adjusting function, between the first tightening member and the third tightening member or between the second tightening member and the third tightening member. The support structure according to any one of claims 1 to 3, wherein a jack arrangement portion capable of arranging a jack for changing a position of the third fastening member is formed. In the connecting member with a length adjustment function , at least one of the one end side of the first elongate member and the one end side of the second elongate member rotates around a pair of axes perpendicular to each other. The support structure according to claim 1, wherein a possible joint member is provided.

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