JP2012001997A - Foldable timbering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide foldable timbering, whose foldable elevation surface among the elevation surfaces constituting the timbering has a simple structure that is capable of being folded, that facilitates manufacturing and assembling, and also allows a span between support columns to be easily adjusted in a factory when manufactured or at a site so as to easily cope with a bolt hole span of a foundation material.SOLUTION: The foldable timbering comprises a fixing surface and two folding surfaces. The fixing surface has a structure in which a plurality of support columns, fixing horizontal members and diagonal members are provided and the support columns are connected by the diagonal members and the horizontal members, and the folding surface has a structure in which a pair of support columns and a refracting horizontal member are provided and the support columns are connected by the refracting horizontal members without providing the diagonal members. The refracting horizontal member is made up of a pair of dividing horizontal members, and one end of each is rotatably connected to the support column, while two refracting horizontal members are respectively met in the axial direction and rotatably connected, which makes the folding surface foldable.

Description

  The present invention relates to a support work used for temporarily receiving heavy objects, such as temporarily suspending a girder of a bridge, and more specifically, it can be miniaturized by folding. It relates to a folding support that can be made.

  Support works were often carried to the site as parts and assembled and completed at the site, which required dangerous work at high places. Therefore, if it can be transported to the site in a state that has been completed (or almost completed) at the factory in advance, it will reduce work at high places on the site, reduce accidents, and increase safety. On the other hand, the support structure in the assembled state is a framework structure mainly composed of columns, horizontal materials and diagonal materials, and the inside is almost space, and the support structure in the assembled state is transported or stored when not in use. -When managing, it requires a storage space for the support work including the internal space, so it could not be transported or stored efficiently.

  Therefore, for example, as in Patent Document 1, a support work that can be folded and reduced in size at the time of transportation or storage has been proposed.

Japanese Patent No. 3700500

  Usually, a support member uses a highly rigid member because it supports a large load, and horizontal members and diagonal members are densely arranged to face not only vertical force but also horizontal force. The support work of Patent Document 1 is also composed of four columns, horizontal members, and diagonal members, and the horizontal members and diagonal members are arranged on all four vertical surfaces (elevation surfaces) formed by the four columns. ing. That is, the horizontal member and the diagonal member are also arranged on the vertical surface to be folded, and both the horizontal member and the diagonal member are devised for folding. This complicates the structure and has the problem of complicated manufacturing and assembly.

  In addition, the conventional support work has the following problems. The installation work of the support work at the site is as follows. First, two rows of H-shaped steels called foundation materials are laid out, two columns are placed on each row of foundation materials, and the base plate at the lower end of the column is connected to the foundation material. Is done. At this time, the bolt holes provided in the base material at predetermined intervals and the bolt holes provided in the base plate of the support are aligned, and then the support is bolted onto the base material. This foundation material is commonly used for various support works, but the support work itself is manufactured separately at the factory, so that the position of the bolt holes on the support base plate and the support material bolt holes are matched. It was necessary to fabricate it while carefully adjusting the width (ie, the distance between the base plates). Still, at the site, the position of the bolt holes of the base plate for the two support struts and the bolt holes of the base material may not match (one strut can be matched but the other does not match). In order to adjust the width between the struts, extra work was required such as disassembling part of the support and reassembling at the site.

  An object of the present invention is to solve the above-mentioned problems, to provide a foldable support that is easy to manufacture and assemble, with a foldable vertical surface among the vertical surfaces constituting the support. It is in. It is also an object of the present invention to provide a foldable support that can easily adjust the width between struts at the time of factory production or at the site so that it can easily cope with the bolt hole interval of the base material.

  Considering the case where a support is used in the construction of the bridge girder, the bridge girder is stable in the direction of the bridge axis because the bridge girder can be received by the support with one end of the bridge girder placed on the abutment or pier. In other words, in reality, the support works rarely receive a force in the direction of the bridge axis. This invention pays attention to this point, and it was made based on the idea which was not possible in the past that it was possible to omit the diagonal material on the vertical surfaces of the vertical surfaces constituting the support work that face the bridge axis direction. Is.

  The foldable support of the present invention is a foldable support that has four or more struts and a horizontal member that connects the struts, and can be folded, and includes a fixed surface and two folding surfaces. The fixed surface includes a plurality of support columns, a fixed horizontal member, and an oblique member, and the support members are connected to each other with an oblique member and a fixed horizontal member. It has a structure in which these struts are connected with a refractive horizontal material without providing a diagonal material. The refractive horizontal material is composed of two divided horizontal materials, and one end of the divided horizontal material rotates to the column. In addition to being freely connected, the two split horizontal members are each butted against each other in the axial direction so as to be rotatable, whereby the folding surface can be folded.

  The folding support structure of the present invention is a pin using a pin in which the connection structure between the divided horizontal member and the support column and the connection structure of one divided horizontal member and the other divided horizontal member are substantially parallel to the axial direction of the support member. It is a coupling, and the connection structure of the divided horizontal members and the support columns and the connection structure of both of the divided horizontal members may be rotatable within a plane substantially perpendicular to the axial direction of the support columns.

  The foldable support of the present invention is a split horizontal member by inserting a pin into a pin insertion hole provided in a column side end of a divided horizontal member and a pin insertion hole provided in a bracket connected to the column. The bracket is bolted to a mounting tool fixed to the column, a bolt hole for bolt insertion provided in the bracket, and a bolt insertion provided in the mounting tool. By making either one of the bolt holes or both bolt holes long, the width between the two struts constituting the folding surface can be adjusted.

  The folding supporter according to the present invention may have two or more horizontal members arranged on the folding surface.

  The foldable support of the present invention includes a foot scene composed of two divided surfaces, and one side of the divided surface is rotatably connected to a fixed surface, and the two divided surfaces are substantially the same surface. The foot scene can be folded and the folding surface can be folded by being faced and connected so as to be rotatable.

The folding support of the present invention has the following effects.
(1) Since it has two folding surfaces, it can be miniaturized when not in use by folding, and can be efficiently conveyed and stored.
(2) Support works assembled at the factory can reduce work at high places, reduce accidents at the site, and increase work safety.
(3) Since no diagonal material is provided on the folding surface, the structure is simple and manufacture and assembly are easy.
(4) When the bridge girder is used for erection, basically the horizontal force that buckles the folding surface does not act, so the support work is stable even if there is no diagonal in the folding surface.
(5) Since the bolt hole of the bracket and the bolt hole of the mounting tool, at least one of the bolt holes is a long hole, it is possible to adjust the width between the two struts constituting the folding surface. It is possible to easily cope with the base material to be used.
(6) Since two or more steps of refracting horizontal members can be provided on the folding surface, folding support members having various heights can be manufactured.

The perspective view which shows the state which the folding type support work of this invention stood. The perspective view which shows the state by which the foldable support work was folded. (A) is a top view which shows the use condition of a foldable support, (b) is a top view which shows the foldable state of a foldable support. The side view which looked at the folding-type support work from the fixed surface. The side view which looked at the folding-type support work from the folding surface. (A) is a side view for showing details of a divided horizontal member, (b) is a plan view for showing details of a divided horizontal member, (c) is a detailed sectional view of a joint, and (d) is (a). The side view of an AA arrow in and the side view of an BB arrow. The top view explaining a connection bracket. It is detail drawing for demonstrating the detail of a coupling bracket, (a) is a top view which shows a coupling bracket, (b) is a front view of CC arrow in a top view, (c) is D- in a front view. The side view of D arrow view. The side view which shows the mounting tool fixed to a support | pillar. Partial detail drawing for demonstrating in detail the connection part of a refractive horizontal member and a connection bracket. (A) is a top view for showing a scaffold, (b) is a partial side view for showing a scaffold, (c) is a partial detail drawing which shows the connection part of a division | segmentation foot scene. (A) is sectional drawing which shows the fixture for scaffolds fixed to the support | pillar, (b) is a side view which shows the fixture for scaffolds fixed to the support | pillar. The top view for showing a base material.

(Embodiment)
An embodiment of a folding supporter 1 of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which a folding support 1 according to the present invention is erected.

(Overall structure)
The folding support 1 has four struts 2 (struts 2a, struts 2b, struts 2c, struts 2d), and these struts are connected by fixed horizontal members 3, diagonal members 4, and refractive horizontal members 5. is there. Base plates are attached to both ends (upper and lower ends in the figure) of each column 2, and when the folding supporter 1 is erected on a local foundation material (described later), or between the folding supporters 1 The base plate 6 is used when connecting the top and bottom.

  The foldable support 1 can also be provided with a working scaffold 7, a handrail 8 for the safety of the worker, and a trap 9 for the worker to move up and down. Note that the number of installation stages of the fixed horizontal member 3 and the refractive horizontal member 5 is designed according to the height of the support column 2. In FIG. 1, both the fixed horizontal member 3 and the refractive horizontal member 5 have three steps. When 2 is higher than FIG. 1, four or more fixed horizontal members 3 and refractive horizontal members 5 are installed. When the support column 2 is lower than FIG. 1, two fixed horizontal members 3 and refractive horizontal members 5 are provided. Can also be installed. The diagonal member 4 is a set of two intersecting ones. The number of installation stages of the diagonal member 4 is designed according to the number of installation stages of the fixed horizontal member 3, and is fixed as shown in FIG. When the horizontal members 3 are installed in three stages, the diagonal members 4 are arranged in two stages. For example, when the fixed horizontal members 3 are installed in only two stages, the oblique members 4 can be installed in one stage. Needless to say, reinforcing members such as ribs and stiffeners can be appropriately disposed as necessary.

  The refraction horizontal member 5 is formed by connecting the divided horizontal member 5a and the divided horizontal member 5b on the same axis, and the refraction horizontal member 5 is folded by folding the connecting portion, resulting in a folding support. 1 is also folded. That is, when the foldable support 1 in the used state shown in FIG. 1 is folded, the size is reduced as shown in FIG. When this is seen in a plan view, the planar shape in a use state as shown in FIG. 3A becomes a miniaturized shape as shown in FIG. 3B by being folded.

  Hereinafter, various elements constituting the folding support 1 will be described in detail. In this description, for the sake of convenience, three axes (X axis, Y axis, Z axis) are provided in the posture of the folding support 1 in an upright state (that is, in use). As shown in FIG. 1, the X axis is a direction connecting two struts 2a and 2b (2c and 2d) constituting a non-foldable surface (hereinafter referred to as "fixed surface A"), and the Y axis is , A direction connecting two struts 2a and 2c (2b and 2d) constituting a plane to be folded (hereinafter referred to as “folding plane B”), and the Z-axis is a standing direction of the strut 2 (that is, vertical) Direction). Therefore, the fixed surface A described below is substantially parallel to the X axis, and the folding surface B is substantially parallel to the Y axis.

(Fixed surface)
As shown in FIG. 1, the foldable support 1 is composed of four standing surfaces, the breakdown of which is two fixed surfaces formed between the strut 2a and the strut 2b and between the strut 2c and the strut 2d. A is a folding surface B of two surfaces formed between A and the columns 2a and 2c and between the columns 2b and 2d. As shown in FIG. 4, the fixed surface A has two columns 2 (column 2a-column 2b or column 2c-column 2d) to be erected and a plurality of stages (in FIG. (3 stages) of fixed horizontal members 3 and diagonal members 4 installed between the fixed horizontal members 3.

  Unlike the refracting horizontal member 5, the fixed horizontal member 3 does not need to be folded in the vicinity of the center of the member, and therefore, usually one independent member is used per step. A normal steel material is used for the refractive horizontal member 5, and various materials can be adopted as long as they can ensure design strength, such as CT shape steel (cut tee), H shape steel, and groove shape steel. Moreover, the both ends of the refractive horizontal member 5 are each fixed to the support | pillar 2, The means conventionally used, such as bolt fixation and welding fixation, can be utilized as the fixation means.

  The diagonal member 4 is disposed between the upper and lower fixed horizontal members 3 on the fixed surface A so as to draw a quadrilateral diagonal line surrounded by the support column 2 and the fixed horizontal member 3. In FIG. 1, the two diagonal members 4 are crossed to form an X-shaped alphabet, but the two diagonal members 4 are further divided at the intersections so that the four diagonal members 4 are arranged in an X shape. May be. The diagonal member 4 is also referred to as a brace or a brace and has a function of reinforcing the fixed surface A, and particularly exhibits a reinforcing effect against external forces in the X-axis direction and the Z-axis direction. As the diagonal member 4, various steel materials such as angle steel, flat steel, and groove steel can be adopted as long as design strength can be secured.

(Folding surface)
As shown in FIG. 5, the folding surface B has two columns 2 (column 2 a-column 2 c or column 2 b-column 2 d) to be erected and a plurality of stages (in FIG. 1) connecting the columns 2 in the horizontal direction. It is composed of a three-stage refractive horizontal member 5. When the foldable support 1 is used for bridge girder construction, the foldable support 1 is arranged so that the folding surface B is parallel to the bridge axis direction. Usually, when the bridge girder is erected, the bridge girder is placed on the folding support 1 with one end of the bridge girder placed on the abutment (or pier). Therefore, it is unlikely that the bridge girder placed on the folding support 1 will behave in the direction of the bridge axis, that is, it is unlikely that the folding surface B will receive a force in the Y-axis direction by the bridge girder. The reinforcing effect is not great. Therefore, unlike the fixed surface A, the diagonal material 4 is not provided in the folding surface B. Since there is no diagonal member 4, the structure of the folding surface B is simple and the folding work is extremely easy.

  The refraction horizontal members 5 installed in a plurality of steps (three steps in FIG. 5) in the folding surface B can all be folded, and by folding them in the middle of the refraction horizontal members 5, the support 2a-support 2c And between the support 2b and the support 2d, the folding support 1 can be flattened as shown in FIGS. 2 and 3B. In FIG. 2, the refracting horizontal member 5 is folded and housed inside the folding support 1, but the refracting horizontal member 5 is folded outside the folding support 1 to fold the folding support 1. The dimension can be further reduced (by the thickness of the refractive horizontal member 5). In the folding work of the folding support 1, the folding support 1 is placed on the ground so that either one of the fixed surfaces A is on the lower side, and the folding work 1 can be folded using its own weight. This can be done easily.

(Refractive horizontal material)
The refracting horizontal member 5 arranged in the folding surface B is composed of two divided horizontal members 5a and divided horizontal members 5b. The divided horizontal members 5a and the divided horizontal members 5b are arranged in the axial direction as shown in FIG. 6 (a), and the end portions are connected to each other by the joint portion F shown in FIG. 6 (b). By using this joint F as a pin connection, the divided horizontal member 5a and the divided horizontal member 5b are rotatably connected.

  6A is a side view for showing details of the divided horizontal members 5a and 5b, and FIG. 6B is a plan view for showing details of the divided horizontal members 5a and 5b. Hereinafter, although the element member which comprises the division | segmentation horizontal members 5a and 5b is demonstrated, the subscript a of the code | symbol attached | subjected in order to demonstrate these element members means the member which comprises the division | segmentation horizontal member 5a, and subscript b is It means a member constituting the divided horizontal member 5b. As shown in FIG. 6A, the divided horizontal member 5a (5b) is formed by attaching a joining side connection plate 52a (52b) and a column side connection plate 53a (53b) to a main material 51a (51b). As the main material 51a (51b), H-shaped steel is suitable, but I-shaped steel, groove-shaped steel, and other members manufactured as dedicated products may be used.

  Of the end portions of the main material 51a (51b), the joining side connection plates 52a (52b) are attached to the end portions constituting the joining portion F at the upper and lower portions. In FIG. 6A, since H-shaped steel is used for the main material 51a (51b), the joining side connection plate 52a (52b) is attached to the flange of H-shaped steel.

(Connection between split horizontal members)
As shown in FIGS. 6B and 6C, the joint side connection plate 52a (52b) is provided with pin insertion holes 54a and 54b for inserting the pins 57, respectively. By inserting the pin 57 with the hole centers of the pin insertion hole 54b aligned, the joint portion F becomes pin-coupled. Since it is necessary to penetrate the pin 57, the joining side connection plate 52a (52b) is welded and fixed to the flange at a portion avoiding the pin insertion hole 54a (54b). That is, as shown in FIG. 6B, the joining-side connecting plate 52a (52b) has a main insertion portion 54a (54b) so that the position of the pin insertion hole 54a (54b) is out of the main material 51a (51b) in plan view. It is fixed by welding to the flange of the material 51a (51b). Further, since the divided horizontal members 5a and 5b rotate around the pin insertion hole 54a (54b) provided in the joining side connection plate 52a (52b), the position of the pin insertion hole 54a (54b) is a plan view. It is away from the center of the H-section steel (web position). Further, in order to facilitate the rotation of the divided horizontal members 5a and 5b, the flange on the pin insertion hole side (the upper side in FIG. 6B) of the end portion (joint portion F side) of the main material 51a (51b). Is partially cut away.

  As shown in FIG. 6A, the joining side connection plate 52a of the divided horizontal member 5a is fixed to the outer side of the flange of the main member 51a (the upper side of the upper flange and the lower side of the lower flange in the drawing). The joining side connection plate 52b is fixed to the inside of the flange of the main material 51b (the lower side of the upper flange and the upper side of the lower flange in the figure). As can be seen from FIG. 6C, which is a detailed sectional view of the joint portion F, when the flange of the main material 51a and the flange of the main material 51a are brought into contact with each other, the joint-side connecting plate 52a (52b) is obstructed. This is to dodge up and down so as not to become.

  FIG.6 (d) is the side view of AA arrow in FIG.6 (a), and the side view of BB arrow. As shown in this figure, stiffeners 55a and 55b for reinforcement can be arranged at the joint F side end of the main material 51a (51b). By providing a bolt hole in the stiffener 55a (55b), when the divided horizontal member 5a and the divided horizontal member 5b are brought into contact with each other, the bolt can be inserted into and fixed to the bolt hole. Of course, the bolt fixing between the stiffeners 55a and 55b is performed only when the folding support 1 is used, and the bolt fixing is released at the time of folding.

(Staff side connection plate)
Of the end portions of the main material 51a (51b), the column-side connection plates 53a (53b) are attached to the end portion on the side to be attached to the column 2 at the upper and lower portions. When H-section steel is used for the main material 51a (51b), the column side connection plate 53a (53b) is attached to the flange of H-section steel. In FIG. 6A, the column side connection plate 53a (53b) is attached to the outside of the H-shaped steel flange, but unlike the joint F, it is not necessary to abut the flange. It can be arbitrarily selected inside or outside. Further, the column side connection plate 53a (53b) is fixed to the main material 51a (51b) by welding or the like. Moreover, as shown in FIG.6 (b), pin insertion hole 56a, 56b for inserting a pin is provided in the support | pillar side connection board 53a (53b), respectively.

(Joint bracket)
FIG. 7 is a plan view for explaining the coupling bracket 10 used for connecting the divided horizontal member 5a (5b) and the support column 2. FIG. As shown in the figure, the coupling bracket 10 is attached to a surface of the support column 2 that faces the adjacent support column 2 in the folding surface B (surface parallel to the Y-axis direction).

  FIG. 8 is a detailed view for explaining the details of the coupling bracket 10, wherein FIG. 8 (a) is a plan view, FIG. 8 (b) is a front view taken along the line CC in the plan view, and FIG. c) is a side view taken along line DD in the front view. As shown in these drawings, the coupling bracket 10 is formed by attaching two coupling bracket side plates 10b on both sides of a coupling bracket bottom plate 10a using angle steel.

(Fixing the coupling bracket to the column)
As shown in FIG. 7, a mounting tool 11 for attaching the coupling bracket 10 is fixed to the support column 2 by welding or the like. The mounting tool 11 is a set of two mounting tools 11 (inside) fixed to the inside of the column 2 and two mounting tools 11 (outside) fixed to the outside of the column 2. As shown in the side view of FIG. 9, these mounting tools 11 are provided with two bolt holes 11 a for each piece. On the other hand, as shown in the side view of FIG. 8C, the two coupling bracket side plates 10b are provided with two bolt holes 10c for inserting bolts. The bolt hole 11a of the mounting tool 11 (inner side) and the bolt hole 10c of the connecting bracket side plate 10b (inner side) are aligned, and the bolt hole 11a of the mounting tool 11 (outer side) and the connecting bracket side plate 10b (outer side) are also aligned. The bolt holes 10c are aligned and bolted at each (four places in the figure). A spare hole 10d shown in FIG. 8 (c) is a hole provided as a spare, and is used for arranging diagonal materials as necessary when a load outside the design is applied, such as during a typhoon.

  As shown in FIG. 5, in order to attach the divided horizontal member 5 a (5 b) to the column 2, two coupling brackets 10 are attached to the column 2 per divided horizontal member 5 a (5 b). The split horizontal member 5a (5b) is sandwiched and supported by the two coupling brackets 10 from above and below. That is, when the three-stage refracting horizontal member 5 is installed in the folding surface B as shown in FIG. 5, six divided horizontal members 5a (5b) are attached to the support column 2, and twelve coupling brackets 10 are attached. Is attached to the column 2. Moreover, 6 sets of 12 pieces (6 pieces on the inside and 6 pieces on the outside) of the mounting tool 11 are fixed to the column.

  In addition, all the bolt holes 10c of the coupling bracket side plate 10b are “long holes” that are long in the folding surface B direction (Y-axis direction) as shown in FIG. 8C. Accordingly, when the coupling bracket 10 is bolted to the mounting tool 11, that is, when the coupling bracket 10 is bolted to the support column 2, the movement bracket can be adjusted in the Y-axis direction. The distance between 2a-2c (between 2b-2d) can be adjusted. In this embodiment, the bolt hole 10c of the coupling bracket side plate 10b is a “long hole” that is long in the Y-axis direction. Instead of (or in addition to) this, the bolt hole 11a of the mounting tool 11 is long in the Y-axis direction. It can also be a “long hole”.

(Connection of refractive horizontal member and coupling bracket)
As shown in the plan view of FIG. 8A, a pin insertion hole 10e for inserting a pin is provided in a portion of the coupling bracket bottom plate 10a that forms the bottom surface. The pin insertion hole 10e is aligned with the pin insertion hole 56a (56b) provided in the column side connection plate 53a (53b) of the split horizontal member 5a (5b), and the pin 12 is inserted into these pin insertion holes. By inserting, the refracting horizontal member 5 and the coupling bracket 10, that is, the refracting horizontal member 5 and the support column 2 can be pin-coupled.

  FIG. 10 is a partial detailed view for explaining in detail the connecting portion between the refractive horizontal member 5 and the coupling bracket 10. A procedure for connecting the refractive horizontal member 5 and the coupling bracket 10 will be described with reference to FIG. First, welding is performed on the end of the main material 51a (51b) of the split horizontal member 5a (5b) between the two coupling brackets 10 that are bolted to the support column 2 (mounting tool 11) with a predetermined interval therebetween. The fixed upper and lower column side connection plates 53a (53b) are inserted. Next, the position of the pin insertion hole 10e of the coupling bracket bottom plate 10a and the position of the pin insertion hole 56a (56b) of the column side connection plate 53a (53b) are aligned, and the pin 12 is inserted in this state. The pin 12 is provided with small holes at both upper and lower ends, and a small pin is inserted into the pin 12 to prevent the pin 12 from falling off. In addition, a washer etc. can be appropriately interposed between the column side connection plate 53a (53b) and the coupling bracket bottom plate 10a.

  With the structure described above, the connection between the divided horizontal member 5a and the divided horizontal member 5b and the connection between the refracting horizontal member 5 and the coupling bracket 10 become pin connections, respectively. As a result, the refracting horizontal member 5 can be folded. It becomes. In addition, the folding direction of the refractive horizontal member 5 in this embodiment is in a plane substantially perpendicular to the axial direction of the support column 2 (in the horizontal plane when the folding support 1 is used, that is, in the XY plane). . The foldable support 1 of the present invention is not limited to this embodiment, but is foldable by inserting the pin 12 (pin coupling at the support column 2) and the pin 57 (pin coupling at the joint F) in a horizontal posture. It is also possible to fold the refractive horizontal member 5 in the vertical plane (that is, in the YZ plane) when the support 1 is used.

(Working scaffold)
The folding support 1 according to the present invention can be provided with a working scaffold 7. As shown in the plan view of the scaffold in FIG. 11A, the scaffold 7 is divided into two foot scenes (a split foot scene 7a and a split foot scene 7b) in order to correspond to the folding support 1. Each of the split foot scene 7a and the split foot scene 7b has a substantially rectangular planar shape, and an expanded metal is pasted on a frame material constituting the outer periphery. One side (the left side in the figure) of the split foot scene 7a that forms the outer periphery of the plane is rotatably attached to the column 2a and column 2b that constitute the fixed surface A. Similarly, one side (right side in the figure) of the split foot scene 7b that forms the outer periphery of the plane is rotatably attached to the column 2c and column 2d that constitute the fixed surface A. Furthermore, the split foot scene 7a and the split foot scene 7b are abutted so as to be substantially in the same plane, and are rotatably connected. These rotation directions are rotations about the horizontal axis (X axis).

  The split foot scene 7a (7b) is rotatably connected to a scaffold attachment 13 fixed to the support 2 by welding. The scaffold fixture 13 is fixed to the outer periphery of the support column 2 by welding or the like as shown in the sectional view of FIG. 12A, and includes a pin insertion hole 13a as shown in the side view of FIG. Yes. By inserting a pin into the pin insertion hole 13a of the scaffold fixture 13 and a pin insertion hole (not shown) provided in the split foot scene 7a (7b), the split foot scene 7a (7b) and the scaffold mounting The tool 13 is a rotatable pin connection. Note that the scaffold fixture 13 is fixed to the inside of the support column 2, and is fixed to the support column 2a side of the support column 2b in the case of the support column 2b of FIG.

  As shown in FIG. 11 (c), the split foot scene 7a (7b) is provided with a connecting tool 71a and a connecting tool 71b, respectively, and these connecting tools 71a and 71b are provided with pin insertion holes 72a and 72b. ing. After matching the split foot scenes 7a and 7b so as to be substantially on the same plane, the pin insertion hole 72a of the connector 71a and the pin insertion hole 72b of the connector 71b are aligned, and the pin is inserted, The split foot scene 7a and the split foot scene 7b are rotatable pin connections.

  As shown in FIG. 11 (b), the scaffold 7 can be suspended from the vertical horizontal member 5 by the vertical member 14 during use. As shown in this figure, one end of the vertical member 14 is attached to a vertical member mounting bracket 58 (FIG. 6A) provided on the refractive horizontal member 5 immediately above the scaffold 7, and the other end of the vertical member 14 is It is attached to the pin insertion holes 72a and 71b of the connector 71a, which is preferable because the weight that can be loaded on the scaffold 7 is increased.

  As shown in FIG. 1 and FIG. 11A, when the wrapping 9 is installed, an opening 15 for raising and lowering the operator is provided in the split foot scene 7a (or the split foot scene 7b).

(handrail)
As shown in FIG. 1, a handrail 8 can be installed on the refractive horizontal member 5 immediately above the scaffold 7 for the safety of the operator. Also in this case, in order to fold the foldable supporter 1, the handrail 8 is divided into two parts which are respectively mounted on the divided horizontal members 5a and 5b. That is, these divided handrails 8 are folded following the movement of the divided horizontal members 5a (5b).

(Basic material)
When the folding supporter 1 is erected on the site, it is installed on the base material 16 shown in FIG. The base material 16 is made of H-shaped steel, and a plurality of bolt holes are provided in the flange portion. When the folding support 1 is used for erection of the bridge girder, two rows of the base materials 16 are arranged in the bridge axis direction (that is, the Y-axis direction), and the width of the fixed surface A of the folding support 1 (that is, the support column 2a-the support column). 2b, the interval between the columns 2c and the columns 2d), and the four columns 2 are placed on the base material 16 in a state where the folding support 1 is in a posture in which the folding surface B faces the bridge axis direction.

  As shown in FIG. 1, a base plate 6 is fixed to the lower end of the column 2, and the base plate 6 is also provided with a plurality of bolt holes (four locations in the figure). The foldable support 1 is erected on the base material 16 by aligning the bolt holes of the base plate 6 and the bolt holes of the flange portion of the base material 16 and fixing the bolts.

  Bolt holes provided in the base plate 6 of the column 2 are processed at the factory. On the other hand, the bolt hole of the flange portion of the base material 16 is also processed at the factory (or on-site), but since this base material 16 is commonly used for various support works, for the specific folding support work 1 The bolt holes are not machined by adjusting the dimensions. Therefore, when the base material 16 is manufactured at the factory, it is necessary to adjust the dimension of the hole interval between the two support columns 2 so as to match the hole interval between the bolt holes in the flange portion of the base material 16. Conventionally, this delicate dimensional adjustment has required considerable labor and time. On the other hand, in the folding supporter 1 of the present invention, the bolt hole 10c (the bolt hole 11a of the mounting tool 11) of the coupling bracket side plate 10b is a “long hole” that is long in the folding surface B direction (Y-axis direction). Therefore, the width of the folding surface B can be easily adjusted. That is, since the size of the bolt hole interval between the two struts 2 can be easily adjusted, labor and time in factory production can be greatly reduced as compared with the conventional case. Even if the dimensions are adjusted at the factory, the position of the bolt holes in the base plate for the two support columns and the bolt holes in the base material may not match. Various measures were taken, such as expanding, providing new bolt holes, or disassembling and reassembling part of the support work. However, since the folding support 1 of the present invention can easily adjust the width of the folding surface B, the distance between the bolt holes between the two struts 2 and the bolt holes in the flange portion of the base material 16 Even if the hole intervals do not match, the width of the folding surface B, that is, the interval between the columns 2 arranged on the base material 16 (the interval between the columns 2a-2c, the interval between 2b-2d) can be easily adjusted. Can do. That is, in the case of the foldable supporter 1 of the present invention, the position of the bolt holes of the base plate 6 and the position of the bolt holes of the base material 16 can be easily matched. This is a significant improvement over the prior art.

(Example of use)
An example of use of the folding support 1 of the present invention will be described below.
Folding support 1 is manufactured at the factory. That is, the fixed horizontal member 3 and the diagonal member 4 constituting the fixed surface A are attached to the four columns 2a, columns 2b, columns 2c, and columns 2d. A base plate 6 in which a predetermined position and a predetermined number of bolt holes are processed is fixed to both ends of the column 2.
The mounting tool 11 is welded and fixed to a predetermined position of the support column 2, the coupling bracket 10 is bolted to the mounting tool 11, and the split horizontal member 5 a and the split horizontal member 5 b constituting the folding surface B are pinned to the mounting bracket 10. Join. At this time, the divided horizontal member 5a and the divided horizontal member 5b are also attached and pin-coupled. However, the bolts of the stiffeners 55a and 55b provided at the joint F of the divided horizontal members 5a and 5b are not fixed. A handrail 8 divided into two parts is attached to each of the uppermost divided horizontal member 5a and the divided horizontal member 5b.
The scaffolding fixture 13 is welded and fixed at a predetermined position of the column 2, and the split foot scene 7a and the foot scene 7b are pin-coupled to the scaffold fixture 13, and the split foot scene 7a and the foot scene 7b are also attached to each other and pin-coupled. Is done. The wrap 9 is inserted and installed in the opening 15 provided in the scaffold scene 7a, and the folding support 1 is completed.
The folding supporter 1 manufactured in the factory is folded with the folding supporter 1 lying so that either one of the fixed surfaces A is on the lower side, and remains in the folded state at the time of shipment. It is lifted and placed on a transport vehicle and shipped from the factory.
At the bridge girder construction site, before the folding supporter 1 is carried in, two rows of foundation members 16 are laid in the direction of the bridge axis and with the width of the fixed surface A of the folding supporter 1. The folding supporter 1 carried into the site is lifted from the transport vehicle in a laid state, and is temporarily lowered to a temporary storage site so that either one of the fixed surfaces A is on the lower side while being laid down. .
The fixed surface A which is not in contact with the ground is lifted by a lifting machine, and the refractive horizontal member 5 is gradually extended from the folded state. In a state in which the refractive horizontal member 5 is fully stretched, the stiffeners 55a and 55b of the divided horizontal members 5a and 5b are bolted together to limit the folding of the refractive horizontal member 5, and the vertical member 14 and the scaffolding for the refractive horizontal member 5 and the scaffold. 7 is connected so that the scaffolding 7 is suspended from the refraction horizontal member 5 immediately above when the folding support 1 is in the standing posture. Further, the handle is changed, the folding supporter 1 is lifted by a lifting machine, and the folding support B is placed on the foundation material 16 in a state where the folding surface B is oriented in the bridge axis direction (the axial direction of the foundation material 16). While moving the foldable support 1 on the base material 16, the distance between the bolt holes provided in the base plate 6 of the support column 2 and the distance between the bolt holes in the flange portion of the base material 16 are fixed with bolts and folded. The installation work of the formula supporter 1 is completed. At this time, the space | interval of the support | pillar 2 which comprises the folding surface B can also be adjusted by shifting the position of the bolt hole 10c with the coupling bracket 10b, and the bolt hole 11a of the mounting tool 11 as needed.
When the construction work of the bridge girder is completed, the folding work is folded in the reverse procedure to that for assembling the folding support 1. Specifically, the folding supporter 1 was lifted by a lifting machine, and the folding supporter 1 was laid down so that either one of the fixed surfaces A was on the lower side, and the weight was still deposited in the lifting machine. In this state, the vertical member 14 is removed from the scaffold 7, the bolt fixing between the stiffeners 55 a and 55 b is released, and the bolt fixing between the base material 16 and the base plate 6 is released. Then, it folds, using the dead weight of the foldable support 1 to gradually lower the upper fixed surface A. The folded supporter 1 in the folded state is placed on a transport vehicle and returned to the warehouse or factory.

(Other embodiments)
In the first embodiment, the description has been given of the case where there are two columns 2 (columns 2a-columns 2b or columns 2c-columns 2d) constituting the fixed surface A. However, the present invention is not limited to this, and the columns 2 are fixed by three or more columns 2. Surface A can also be configured. In this case, the number of fixed horizontal members 3 and diagonal members 4 is increased in accordance with the number of support columns 2. For example, when three support columns 2 constituting the fixed surface A are installed and the number of installation stages of the fixed horizontal member 3 is three, fixed Six horizontal members 3 and four pairs of diagonal members 4 are arranged.

The folding support 1 of the present invention can be used alone as shown in the first embodiment, but two or more folding supports 1 can be used as a unit. it can. In this unit combination, two or more folding supporters 1 may be connected side by side in the horizontal direction (X-axis direction or Y-axis direction), or two or more folding supporters 1 may be connected in the vertical direction (Z-axis direction). ) May be connected side by side.

  The folding support structure of the present invention is not limited to bridge girder construction but can be used for concrete placement of a structure slab, and can also be applied as a folding scaffold with the same structure.

DESCRIPTION OF SYMBOLS 1 Folding support 2 Support 2a (1st) support 2b (2nd) support 2c (3rd) support 2d (4th) support 3 Fixed horizontal material 4 Diagonal material 5 Refraction horizontal material 5a (First Split horizontal material 5b (second) split horizontal material 51a (divided horizontal material) main material 51b (divided horizontal material) main material 52a (divided horizontal material) joint side connection plate 52b (divided horizontal material) Joint side connection plate 53a (divided horizontal member) post side connection plate 53b (partial horizontal member) post side connection plate 54a (joint side connection plate) pin insertion hole 54b (joint side connection plate) pin insertion hole 55a (joint side connection plate) Stiffener 55b (for joint) Stiffener 56a (for bolt hole strut side connection plate) pin insertion hole 56b (for bolt hole strut side connection plate) pin insertion hole 57 (at joint F) pin 58 Vertical material Mounting bracket 6 Base plate 7 Scaffold a (first) split foot scene 7b (second) split foot scene 71a (for split foot scene) connector 71b (for split foot scene) connector 72a (for connector) pin insertion hole 72b (for connector) ) Pin insertion hole 8 Handrail 9 Trap 10 Joint bracket 10a Joint bracket bottom plate 10b Joint bracket side plate 10c Bolt hole 10d (on the joint bracket side plate) Spare hole 10e (on the joint bracket bottom plate) Pin insertion hole 11 Mounting tool 11a Bolt hole (on the coupling bracket side plate) 12 Pin (on the coupling bracket) 13 Scaffolding attachment 13a (scaffolding attachment) Pin insertion hole 14 (suspending scaffold) vertical material 15 (Scaffold) opening 16 Foundation material A Fixed surface B Folding surface F Joint of split horizontal material

Claims (5)

In a foldable support that has four or more struts and a horizontal member that connects these struts and can be folded,
A fixed surface and two folding surfaces;
The fixed surface has a plurality of support columns, a fixed horizontal material, and a diagonal material, and the structure between the support columns is connected with the diagonal material and the fixed horizontal material,
The folding surface has two struts and a refractive horizontal member, and the struts are connected by a refractive horizontal member without providing a diagonal member,
The refractive horizontal member is composed of two divided horizontal members,
One end of the divided horizontal member is rotatably connected to the support column, and the two divided horizontal members are each axially abutted and rotatably connected, whereby the folding surface can be folded. Folding support work. In the folding support structure according to claim 1,
The connection structure between the divided horizontal member and the support column, and the connection structure of one divided horizontal member and the other divided horizontal member are pin connections using pins that are substantially parallel to the axial direction of the support member,
A folding support structure characterized in that the connecting structure of the divided horizontal member and the support column and the connecting structure of both divided horizontal members are rotatable in a plane substantially perpendicular to the axial direction of the support member. In the folding support structure according to claim 2,
The split horizontal member and the column are rotatably connected by inserting a pin into the pin insertion hole provided in the column end of the divided horizontal member and the pin insertion hole provided in the bracket connected to the column,
The bracket is bolted to a mounting tool fixed to the column,
Folding is performed by making either one of the bolt holes of the bolt insertion provided in the bracket and the bolt hole for bolt insertion provided in the mounting tool, or both of the bolt holes long. A foldable support structure characterized in that the width between two struts constituting the surface can be adjusted. In the foldable support structure according to any one of claims 1 to 3,
A foldable support structure in which two or more horizontal members are arranged on the folding surface. In the foldable support structure according to any one of claims 1 to 4,
It has a foot scene composed of two split surfaces,
One side of the split surface is rotatably connected to a fixed surface, and the two split surfaces are abutted so as to be substantially on the same plane and are rotatably connected, so that the foot scene can be folded. The folding support is characterized in that the folding surface can be folded.

Images