Positioning jig

Abstract

To improve the ease of use of positioning jigs, especially positioning jigs that use brackets in conjunction with other equipment. [Solution] The positioning jig 100 is for positioning a second precast concrete column P2, which has a second surface F2 into which a plurality of insertion holes D2 are formed, into which the plurality of reinforcing bars D1 are individually inserted, relative to a first precast concrete column P1 into which a plurality of reinforcing bars D1 protrude from a first surface F1. The jig includes a pressing tool 10 configured to press the side surface of the second precast concrete column P2 while capturing at least one of the plurality of reinforcing bars D1, and a bracket 70 on which the pressing tool 10 is slidably mounted in a direction parallel to the direction in which the pressing tool 10 presses the side surface of the second precast concrete column P2.

Description

Technical Field

[0001] The present disclosure relates to a positioning jig, and particularly to a positioning jig for upper and lower PCa columns connected in the vertical direction.

Background Art

[0002] A positioning jig disclosed in Patent Document 1 is widely used for positioning precast concrete columns (hereinafter referred to as PCa columns) produced in a factory. Patent Document 1 discloses a technique in which, with the reinforcing bars of a PCa column captured by the hook portions of a hook plate, the side surface of the PCa column to be connected above it is pressed by a pressing pad. A nut portion is provided on the hook plate for the forward and backward movement of the pressing pad, and a threaded rod is screwed into this nut portion. The pressing pad is rotatably attached to the tip of the threaded rod, and thus, the pressing pad can be moved forward and backward while maintaining a certain posture by rotating the threaded rod. FIG. 5 of Patent Document 1 discloses a form in which the positioning jig is supported by an attachment. In Patent Document 1, the hook plate is fastened to the attachment with screws. By using the attachment, the threaded rod can be rotated stably.

[0003] Patent Document 2 discloses a jig (see FIG. 5 of the same document) for performing vertical positioning in accordance with horizontal positioning when positioning upper and lower PCa columns.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] The distance from the side of a precast concrete (PCa) column to the reinforcing bar may vary from one construction project to another (for example, the building being constructed). When using the attachment shown in Figure 5 of Patent Document 1, the operation of hooking the hook portion of the hook plate onto the reinforcing bar may be hindered by the attachment. Although it is possible to hook the hook portion of the hook plate onto the reinforcing bar with the attachment removed, this may require attaching and detaching the attachment each time it is used. Furthermore, while it may be possible to prepare attachments of various sizes, selecting the appropriate size attachment each time it is used could itself become a significant burden.

[0006] In light of the above-mentioned non-limiting challenges, the inventors of the present invention have identified a new challenge: improving the ease of use of positioning jigs, particularly positioning jigs used in conjunction with brackets. [Means for solving the problem]

[0007] A positioning jig according to one aspect of the present disclosure is a positioning jig for positioning a second precast concrete column having a plurality of insertion holes formed on its second surface into which a plurality of reinforcing bars are individually inserted, relative to a first precast concrete column having a plurality of reinforcing bars protruding from its first surface. A pressing tool configured to press the side surface of the second precast concrete column while capturing at least one of the plurality of reinforcing bars, The bracket includes a bracket on which the pressing tool is slidably mounted in a direction parallel to the direction in which the pressing tool presses the side surface of the second precast concrete column.

[0008] In some embodiments, the bracket has a mounting plate on which the press is mounted, the mounting plate has at least one elongated hole extending along the sliding direction of the press, thereby allowing the press to be fixed in position relative to the mounting plate at a variable position in its sliding direction.

[0009] In some embodiments, the at least one elongated hole includes two elongated holes that extend parallel to each other.

[0010] In some embodiments, the bracket has a pair of projections connected to the mounting plate at a distance from each other in the width direction of the mounting plate perpendicular to the sliding direction of the press, and a path for movement of the press is defined between the pair of projections.

[0011] In some embodiments, the bracket further includes a support plate that, together with the mounting plate, forms a bent plate that is bent at approximately 90° or approximately L-shaped when viewed from the side, and the support plate is capable of contacting the side surface of the first precast concrete column.

[0012] In some embodiments, the support plate is individually connected to a pair of tabs to be inserted between the first and second surfaces, and the pair of tabs are provided on both sides of the mounting plate in the width direction of the mounting plate, perpendicular to the sliding direction of the pressing tool.

[0013] In some embodiments, the bracket includes a mounting plate on which the pressing device is mounted, a support plate that, together with the mounting plate, forms a bent plate that is bent at approximately 90° or approximately L-shaped when viewed from the side, and a reinforcing portion integrally joined to the mounting plate and the support plate in order to prevent the mounting plate from bending.

[0014] In some embodiments, the reinforcing portion is shaped by bending a single metal plate, and the reinforcing portion has a pair of side plates, each welded to the mounting plate and the support plate, and a bottom plate welded to the mounting plate and the support plate and connecting the pair of side plates.

[0015] In some embodiments, the bottom plate is inclined to approach the mounting plate as it moves away from the support plate along the sliding direction of the pressing tool.

[0016] In some embodiments, the pressing tool includes a hook plate, a nut portion mounted on the hook plate, a screw rod rotatably screwed to the nut portion, and a pressing pad rotatably attached to one end of the screw rod on the side of the second precast concrete column.

Advantages of the Invention

[0017] According to one aspect of the present disclosure, the ease of use of the positioning jig can be improved. In particular, it is possible to promote the combined use of the bracket while avoiding or reducing the sacrifice of the operability of the positioning jig when capturing the reinforcing bars, or it is possible to promote the reduction of the operation burden of attaching and detaching the bracket each time the positioning jig is used.

Brief Description of the Drawings

[0018] [Figure 1] It is a schematic diagram showing a usage mode of a positioning jig involving the combined use of a bracket according to one aspect of the present disclosure. [Figure 2] It is an exploded perspective view of the positioning jig. [Figure 3] It is a top view of the positioning jig, and the location where the pressing pad is rotatably connected to the screw rod via the connecting portion is shown in partial cross-section. [Figure 4] It is a schematic top view of the bracket, with the hook plate shown by a dotted line and the reinforcing portion shown by a dashed-dotted line. [Figure 5] It is a schematic cross-sectional view of the positioning jig. For the sake of illustration, a part of the pressing pad, the connecting portion, and a part of the screw rod are shown as a side view. [Figure 6] It is a front view of the positioning jig. [Figure 7] It is a front view of the positioning jig, and only the reinforcing portion is shown in the cross-section at VII-VII in FIG. 5. [Figure 8] It is a front view of the positioning jig, and only the reinforcing portion is shown in the cross-section at VIII-VIII in FIG. 5. [Figure 9] It is a top view of the positioning jig, and the pressing tool is positioned at the rearmost. [Figure 10] It is a top view of a positioning jig, and the pressing tool is positioned at the foremost position. [Figure 11] It is a process diagram for explaining the usage process of the positioning jig. [Figure 12] It is a process diagram for explaining the usage process of the positioning jig. [Figure 13] It is a process diagram for explaining the usage process of the positioning jig.

Embodiments for Carrying out the Invention

[0019] Hereinafter, non-limiting embodiments and features of the present invention will be described with reference to the drawings. Those skilled in the art can combine each embodiment and / or each feature without excessive explanation and can also understand the synergistic effect brought by this combination. Redundant explanations between embodiments are omitted in principle. The reference drawings are mainly for the purpose of describing the invention and are simplified for the convenience of drawing.

[0020] The positioning jig 100 according to this disclosure will be described with reference to Figures 1 to 13. Figure 1 is a schematic diagram showing how the positioning jig 100 is used. Figure 2 is an exploded perspective view of the positioning jig 100. Figure 3 is a top view of the positioning jig 100, showing in a partial cross-section the location where the pressing pad 60 is rotatably connected to the threaded rod 40 via the connecting portion 50. Figure 4 is a schematic top view of the bracket 70, showing the hook plate 20 with a dotted line and the reinforcing portion 80 with a dashed line. Figure 5 is a schematic cross-sectional view of the positioning jig 100, showing, for convenience of illustration, a part of the pressing pad 60, the connecting portion 50, and a part of the threaded rod 40 as a side view. Figure 6 is a front view of the positioning jig 100. Figure 7 is a front view of the positioning jig 100, showing the reinforcing portion 80 in the cross-section at VII-VII in Figure 5. Figure 8 is a front view of the positioning jig 100, and the reinforcing portion 80 is shown in the cross-section at VIII-VIII in Figure 5. Figure 9 is a top view of the positioning jig 100, with the pressing tool 10 positioned at the rearmost position. Figure 10 is a top view of the positioning jig 100, with the pressing tool 10 positioned at the frontmost position. Figures 11 to 13 are process diagrams for explaining the process of using the positioning jig 100. For the sake of explanation, the direction corresponding to the movement direction of the pressing pad 60 is defined as the front-rear direction, the direction perpendicular to this (the width direction of the mounting plate 71) is defined as the left-right direction, and the direction perpendicular to both the front-rear and left-right directions is defined as the up-down direction. Approximately 90° includes any angle within the range of 89° to 91°.

[0021] The positioning jig 100 is used to position the second precast concrete column (hereinafter referred to as the second PCa column) P2 relative to the first precast concrete column (hereinafter referred to as the first PCa column) P1. Typically, the first PCa column P1 is positioned below and the second PCa column P2 is positioned above in the vertical direction, and the positioning jig 100 is used to position the second PCa column P2 relative to the first PCa column P1 in the horizontal direction.

[0022] The first and second PCa columns P1 and P2 are rectangular parallelepipeds made of concrete reinforced with numerous reinforcing bars. The first PCa column P1 is manufactured with multiple reinforcing bars D1 protruding from its first surface (e.g., top surface) F1. The second PCa column P2 is manufactured with multiple insertion holes D2 formed on its second surface (e.g., bottom surface) F2 into which multiple reinforcing bars D1 are individually inserted. The reinforcing bars D1 of the first PCa column P1 are individually inserted into the insertion holes D2 of the second PCa column P2. Subsequently, the second PCa column P2 is positioned relative to the first PCa column P1. Next, cement-based material or the like is injected into the insertion holes D2 into which the reinforcing bars D1 are inserted and allowed to harden. In this way, the first PCa column P1 and the second PCa column P2 are joined and connected. There are no limitations on the specific method of joining or connecting the first PCa column P1 and the second PCa column P2, and various methods available at the present or future time can be adopted.

[0023] The positioning jig 100 is used to position the second PCa column P2 relative to the first PCa column P1, with multiple reinforcing bars D1 individually inserted into multiple insertion holes D2. The positioning jig 100 is not limited to being used alone; multiple jigs can be used simultaneously. For example, a total of four or eight positioning jigs 100 can be used, corresponding to the four sides of the first PCa column P1. Specifically, the positioning jig 100 on the north side is used to displace the second PCa column P2 to the south. The positioning jig 100 on the south side is used to displace the second PCa column P2 to the north. As an addition or alternative, the positioning jig 100 on the east side is used to displace the second PCa column P2 to the west. The positioning jig 100 on the west side is used to displace the second PCa column P2 to the east. By ensuring a balance of opposing vectors related to the displacement of the second PCa column P2 in this way, the second PCa column P2 is properly positioned relative to the first PCa column P1. Furthermore, it is naturally possible to use two or more positioning jigs 100 for a single side (orientation).

[0024] The positioning jig 100 includes a pressing tool 10 configured to press against the side surface of the second PCa column P2 while capturing at least one of the multiple reinforcing bars D1, and a bracket 70 on which the pressing tool 10 is mounted so as to slide in a direction parallel to the direction in which the pressing tool 10 presses against the side surface of the second PCa column P2. The bracket 70 supports the pressing tool 10, thereby allowing the pressing tool 10 to be used even in situations where it cannot be stably installed on a horizontal base surface or the like. In particular, the pressing tool 10 is mounted so as to slide relative to the bracket 70. This improves the ease of use of the positioning jig 100. This point will be explained in more detail later.

[0025] In the illustrated example, the pressing device 10 includes a hook plate 20, a nut portion 30 mounted on the hook plate 20, a threaded rod 40 rotatably screwed onto the nut portion 30, and a pressing pad 60 rotatably attached to the front end (one end) of the threaded rod 40 on the second PCa column P2 side. Optionally, the pressing pad 60 is rotatably connected to the threaded rod 40 via a connecting portion 50.

[0026] The hook plate 20 is slidably mounted on the bracket 70, particularly on the mounting plate 71 described later. The hook plate 20 consists of a single or multi-layered metal plate having an upper and lower surface, and typically has a thickness of 1 cm or more to have sufficient mechanical rigidity. The hook plate 20 has a base portion 21, a straight portion 22, and a hook portion 23 extending from rear to front. A nut portion 30 is fixed on the base portion 21. The straight portion 22 extends linearly along the front-rear direction with a predetermined width. The hook portion 23 extends in an arc shape longer than a semicircle to define the receiving space 23r for the reinforcing bar D1. Typically, the tip 23b of the hook portion 23 is oriented to face left or right. The hook portion 23 is not limited to a single hook shape, but can also be shaped to have two or more hook shapes.

[0027] The nut portion 30 is fixed to the hook plate 20, for example, the base portion 21, as described above. The nut portion 30 has a screw groove formed spirally along the front-rear direction on its inner surface. Although not necessarily so, in the illustrated example, the nut portion 30 has a central portion with a screw groove and left and right mounting portions for fixing the nut portion 30 to the hook plate 20. The left and right mounting portions have openings (without threads) through which a bolt passes. The bolt is passed through or screwed into the (without threads) opening in the mounting portion, and then passed through or screwed into the (threaded) opening formed in the hook plate 20. Optionally, the opening in the hook plate 20 can be made without threads, through which the lower end of the bolt passes, and the lower end of this bolt protrudes from the lower surface of the hook plate 20 and is fixed by a nut. This nut can be at least partially received in the elongated holes 75p and 75q of the bracket 70, which will be described later.

[0028] The threaded rod 40 extends along the axis AX and is screwed into the threaded groove of the nut portion 30. The rear end of the threaded rod 40 is provided with a mounting end 41 to which a tool such as a spanner, box wrench, or adjustable wrench can be attached. The front end of the threaded rod 40 is rotatably connected to a pressure pad 60 via a connecting portion 50. The pressure pad 60 is a flat plate portion (for example, a single or multi-layered metal plate) with sufficient mechanical strength, and preferably its front surface is flat and oriented perpendicular to the front-rear direction.

[0029] The connecting portion 50, in some cases, has a fixing portion 51 fixed to the front end of the threaded rod 40 and a fastening screw 52 fixed to the fixing portion 51 (see Figure 3). The fastening screw 52 rotatably attaches the pressure pad 60 to the fixing portion 51. The fastening screw 52 passes through the through hole of the pressure pad 60 and is then fixed to the fixing portion 51 (for example, the bottom of its groove). The head of the fastening screw 52 is positioned to lightly contact or with a small gap the front side of the stepped surface of the through hole of the pressure pad 60, thereby connecting the two in a manner in which the rotational force of the threaded rod 40 is not transmitted to the pressure pad 60. Any joint part such as a swivel torque hinge or a bearing can be used for the connecting portion 50, and is not limited to the illustrated example.

[0030] As can be seen from Figures 5, 9, and 10, the clockwise rotation of the threaded rod 40 causes the threaded rod 40 to move forward, and in conjunction with this, the pressure pad 60 slides forward on the hook plate 20. No rotational force is transmitted from the threaded rod 40 to the pressure pad 60, and therefore the pressure pad 60 can slide on the hook plate 20 while maintaining a constant position. The counterclockwise rotation of the threaded rod 40 causes the threaded rod 40 to move backward, and in conjunction with this, the pressure pad 60 slides backward on the hook plate 20.

[0031] Next, the bracket 70 will be described with reference to Figures 4 to 8. The bracket 70 includes at least a mounting plate 71 on which the pressing device 10 is mounted. When the hook plate 20 captures the reinforcing bar D1 and the pressing pad 60 is in contact with the side surface of the second PCa column P2, and the pressing pad 60 is to be advanced further, it is necessary to apply a greater torque to the threaded rod 40. Therefore, if the bracket 70 is not used, the hook plate 20 may bend downward (for example, bending downward as it moves away from the side surface of the first PCa column P1). The use of the bracket 70, in particular the bracket 70 including the mounting plate 71, avoids or suppresses downward bending of the hook plate 20. In some embodiments, the mounting plate 71 may include a front portion that rests on the first surface F1 of the first PCa column P1, but in the illustrated example, this function is assigned to the support plate 73, which will be described later.

[0032] In some cases, the bracket 70 includes, in addition to the mounting plate 71, a support plate 73 that, together with the mounting plate 71, forms a bent plate that is bent at approximately 90° or approximately L-shaped when viewed from the side. It is preferable that the mounting plate 71 and the support plate 73 form a bent plate that is bent at approximately 90° or approximately L-shaped when viewed from the side. Typically, a single metal plate is bent at approximately 90° so as to include at least two parts of the mounting plate 71 and the support plate 73. The support plate 73 abuts against the side of the first PCa column P1, stabilizing the posture of the bracket 70 against the force applied to the threaded rod 40 and promoting more stable rotation of the threaded rod 40. The connection between the mounting plate 71 and the support plate 73 can also suppress deflection of the mounting plate 71.

[0033] Optionally, the bracket 70 may have a pair of projections 72p, 72q connected to the mounting plate 71 at a distance in the width direction of the mounting plate 71, perpendicular to the sliding direction of the pressing tool 10. A path for movement for the pressing tool 10 is defined between the pair of projections 72p, 72q, improving the straightness of the pressing tool 10. The projections 72p, 72q can be provided by bending a single metal plate, similar to the mounting plate 71 and the support plate 73. For example, by bending the left and right side edges of a flat plate portion that includes the portion to be the mounting plate 71, the portion to be the projection 72p, and the portion to be the projection 72q upward, a three-sided frame portion consisting of the mounting plate 71 and the pair of projections 72p, 72q can be constructed. The mechanical strength of the bracket 70 can be increased by employing bending from a single metal plate.

[0034] As a further option, a pair of tabs 74p and 74q are individually connected to the support plate 73, to be inserted between the first surface F1 and the second surface F2. The pair of tabs 74p and 74q are provided on both sides of the mounting plate 71 in the width direction of the mounting plate 71, perpendicular to the sliding direction of the pressing tool 10. By providing the pair of tabs 74p and 74q in this way, the bracket 70's resistance to the torsional force applied when the threaded rod 40 is rotated to further advance the pressing tool 10 (in contact with the side surface of the second PCa column P2) can be increased. The pair of tabs 74p and 74q can be provided by bending the portion that will become tab 74p approximately 90° forward relative to the portion that will become support plate 73, and by bending the portion that will become tab 74q approximately 90° forward relative to the portion that will become support plate 73. As described above, the mechanical strength of the bracket 70 can be increased by employing bending.

[0035] As described above, the pressing tool 10 is mounted slidably on the bracket 70. For this purpose, the mounting plate 71 is provided with at least one elongated hole, preferably two elongated holes 75p and 75q, extending parallel to each other, along the sliding direction of the pressing tool 10 (where the sliding direction is parallel to the front-rear direction). By using such elongated holes 75p and 75q, the pressing tool 10 can be fixed in position relative to the mounting plate 71 at a variable position in the sliding direction of the pressing tool 10 (any position along the longitudinal direction of the elongated holes 75p and 75q).

[0036] Preferably, fasteners 91p, 91q are used to fix the position of the pressing device 10 (e.g., hook plate 20 (preferably base 21)) relative to the bracket 70 (e.g., mounting plate 71) (see Figure 2). The fasteners 91p, 91q are typically bolts and are screwed into threaded holes provided in the hook plate 20 (e.g., base 21) via elongated holes 75p, 75q. In this way, the pressing device 10 can be fixed to the bracket 70 at any position within the length range of the elongated holes 75p, 75q, and the fastening between the bracket 70 and the pressing device 10 can be loosened or released as needed.

[0037] Another mechanism, such as a linear guide, may be used for the sliding of the pressing tool 10. Typically, the use of the elongated holes and fasteners described above is adopted, taking into account the force applied to the threaded rod 40 or the force applied to the hook plate 20. The hook plate 20 of one positioning jig 100 (for example, one located on the south side) may be subjected to force from the reinforcing bar D1 in response to the operation of another positioning jig 100 (for example, one located on the east side), causing it to deform. It is desirable that the deformation of the hook plate 20 does not directly or indirectly affect the straightness of the pressing tool 10, and therefore, the use of the elongated holes and fasteners described above, or fastening the base 21 of the hook plate 20 to the bracket 70, may be appropriate.

[0038] The bracket 70 may optionally have, in addition to the mounting plate 71 and support plate 73 described above, a reinforcing portion 80 integrally joined to the mounting plate 71 and support plate 73 to prevent the mounting plate 71 from deflecting. The reinforcing portion 80 is best shaped by bending a single metal plate, thereby providing greater mechanical strength. Preferably, the reinforcing portion 80 is joined by welding over substantially the entire contact area with the mounting plate 71 and support plate 73. Substantially the entire area means 95% or more of the entire area. As an addition or alternative, the bracket 70 may be constructed from a total of two joined metal plates. The first metal plate may include the mounting plate 71 (with or without a pair of protrusions) and the support plate 73 (with or without a pair of tabs). The second metal plate may include the reinforcing portion 80.

[0039] As can be seen from Figures 4-8, the reinforcing section 80 has a pair of side plates 81p and 81q, each welded to the mounting plate 71 and the support plate 73, and a bottom plate 82 welded to the mounting plate 71 and the support plate 73 and connecting the pair of side plates 81p and 81q. As shown in Figure 4, the side plate 81p has an upper edge joined to the lower surface of the mounting plate 71, the side plate 81q has an upper edge joined to the lower surface of the mounting plate 71, and the bottom plate 82 has an upper edge (or rear edge) joined to the lower surface of the mounting plate 71. As shown in Figure 4, the side plate 81p has a front edge joined to the rear surface of the support plate 73, the side plate 81q has a front edge joined to the rear surface of the support plate 73, and the bottom plate 82 has a lower edge (or front edge) joined to the rear surface of the support plate 73.

[0040] The reinforcing portion 80 can be joined to the mounting plate 71 by welding at three edges that contact the lower surface of the mounting plate 71 (the upper edge of the side plate 81p, the upper edge of the side plate 81q, and the upper (or rear) edge of the bottom plate 82). The reinforcing portion 80 can be joined to the support plate 73 by welding at three edges that contact the rear surface of the support plate 73 (the front edge of the side plate 81p, the front edge of the side plate 81q, and the front (or lower) edge of the bottom plate 82). By providing the reinforcing portion 80 in this way, the mechanical strength of the bracket 70 is increased, reducing the deflection of the mounting plate 71 to a negligible or nonexistent degree, promoting the stable application of torque to the threaded rod 40, and also promoting the stable propulsion of the pressing tool 10.

[0041] Preferably, the reinforcing portion 80 is joined to the mounting plate 71 by welding along approximately the entire length of the upper edge of the side plate 81p, approximately the entire length of the upper edge of the side plate 81q, and approximately the entire length of the upper edge of the bottom plate 82. Alternatively, the reinforcing portion 80 is joined to the support plate 73 by welding along approximately the entire length of the front edge of the side plate 81p, approximately the entire length of the front edge of the side plate 81q, and approximately the entire length of the front edge of the bottom plate 82. Approximately the entire length means a length of 95% or more of the total length. By providing the reinforcing portion 80 in this way, the mechanical strength of the bracket 70 is increased, reducing the deflection of the mounting plate 71 completely or to a negligible degree, promoting the stable application of torque to the threaded rod 40, and also promoting the stable propulsion of the pressing tool 10. There are no limitations on the specific welding method, and arc welding or the like can be used.

[0042] As shown in Figure 5, it is preferable to form drainage holes H1 in the side plate 81q near the joint between the mounting plate 71 and the support plate 73. This allows water that has entered the interior during the welding process or during the use of the positioning jig 100 to be drained, thereby extending the lifespan of the bracket 70.

[0043] As can be seen from Figures 6 to 8, the bottom plate 82 can be inclined to approach the mounting plate 71 as it moves away from the support plate 73 along the sliding direction of the pressing tool 10. This prevents or suppresses the reinforcing portion 80 from colliding with surrounding objects and hindering the use of the bracket 70. As shown in Figures 7 and 8, the reinforcing portion 80 has a substantially U-shaped cross-section in a plane perpendicular to the sliding direction of the pressing tool 10, and the height of the U-shaped cross-section gradually decreases as it moves away from the support plate 73. This makes it possible to avoid or suppress collisions between the reinforcing portion 80 and surrounding objects while ensuring a sufficient contact area between the reinforcing portion 80 and the mounting plate 71, and also ensure a sufficient contact area between the reinforcing portion 80 and the support plate 73.

[0044] Next, the operation of the positioning jig 100 will be explained with reference to Figures 9 and 10. By moving the positioning jig 100 from the state shown in Figure 9 to the state shown in Figure 10, the hook plate 20 can extend further forward from the bracket 70, making it easier to hook the hook portion 23 of the hook plate 20 onto the reinforcing bar D1. When storing the positioning jig 100 in a warehouse or transporting it from the warehouse to a construction site, the positioning jig 100 can be made more compact by moving it from the state shown in Figure 10 to the state shown in Figure 9.

[0045] Finally, an example of using the positioning jig 100 will be described with reference to Figures 11 to 13. First, as shown in Figure 11, the hook portion 23 of the hook plate 20 captures the reinforcing bar D1. At this time, the hook plate 20 is loosely fastened to the bracket 70. Therefore, the hook plate 20 and the bracket 70 can slide relative to each other. Next, as shown in Figure 12, the bracket 70 is advanced. As a result, the support plate 73 of the bracket 70 comes into contact with the side surface of the first PCa column P1. In this way, the positioning jig 100 is roughly positioned relative to the first PCa column P1, and in this state, the hook plate 20 and the bracket 70 are strongly fastened, preventing relative sliding displacement. Next, as can be seen from Figure 13, the threaded rod 40 is rotated, and the pressing pad 60 is advanced (while sliding on the upper surface of the hook plate 20) and brought into contact with the side surface of the second PCa column P2. In this way, the second PCa column P2 can be positioned horizontally relative to the first PCa column P1.

[0046] Based on the above disclosures, those skilled in the art can make various modifications to each embodiment and each feature. [Explanation of symbols]

[0047] 10: Pressing tool 20: Hook Plate 30: Nut part 40: Threaded rod 60: Pressure pad 70: Bracket 71: Implementation board 73: Support plate 75p: Long hole 75q: long hole 80: Reinforcement section 100: Positioning jig

Claims

1. A positioning jig (100) for positioning a second precast concrete column (P2) having multiple insertion holes (D2) formed on its second surface (F2) into which multiple reinforcing bars (D1) are individually inserted, relative to a first precast concrete column (P1) having multiple reinforcing bars (D1) protruding from its first surface (F1), A pressing tool (10) is configured to press the side surface of the second precast concrete column (P2) while capturing at least one of the plurality of reinforcing bars (D1), The second precast concrete column (P2) is provided with a bracket (70) on which the pressing tool (10) is slidably mounted in a direction parallel to the direction in which the pressing tool (10) presses the side surface of the second precast concrete column (P2), The bracket (70) has a mounting plate (71) on which the pressing tool (10) is mounted. The mounting plate (71) has at least one elongated hole (75p, 75q) extending along the sliding direction of the pressing tool (10), thereby allowing the pressing tool (10) to be fixed in position relative to the mounting plate (71) at a variable position in its sliding direction, in a positioning jig.

2. The positioning jig according to claim 1, wherein the at least one elongated hole (75p, 75q) includes two elongated holes extending parallel to each other.

3. The positioning jig according to claim 1, wherein the bracket (70) has a pair of projections (72p, 72q) connected to the mounting plate (71) at a distance from each other in the width direction of the mounting plate (71) perpendicular to the sliding direction of the pressing tool (10), and a path for movement of the pressing tool (10) is defined between the pair of projections (72p, 72q).

4. The positioning jig according to claim 1, wherein the bracket (70) further has a support plate (73) that, together with the mounting plate (71), forms a bent plate that is bent at approximately 90° or approximately L-shaped when viewed from the side, and the support plate (73) is capable of contacting the side surface of the first precast concrete column (P1).

5. The positioning jig according to claim 4, wherein a pair of tabs (74p, 74q) to be inserted between the first surface (F1) and the second surface (F2) are individually connected to the support plate (73), and the pair of tabs (74p, 74q) are provided on both sides of the mounting plate (71) in the width direction of the mounting plate (71) perpendicular to the sliding direction of the pressing tool (10).

6. A positioning jig (100) for positioning a second precast concrete column (P2) having a plurality of insertion holes (D2) formed on the second surface (F2) into which a plurality of reinforcing bars (D1) protrude from the first surface (F1) of a first precast concrete column (P1), wherein A pressing tool (10) is configured to press the side surface of the second precast concrete column (P2) while capturing at least one of the plurality of reinforcing bars (D1), The second precast concrete column (P2) is provided with a bracket (70) on which the pressing tool (10) is slidably mounted in a direction parallel to the direction in which the pressing tool (10) presses the side surface of the second precast concrete column (P2), The bracket (70) is The mounting plate (71) on which the pressing tool (10) is mounted, Together with the mounting plate (71), a support plate (73) forms a bent plate that is bent at approximately 90° or approximately L-shaped when viewed from the side, A positioning jig having a reinforcing portion (80) integrally joined to the mounting plate (71) and the support plate (73) in order to prevent the mounting plate (71) from bending.

7. The reinforcing portion (80) is shaped by bending a single metal plate. The positioning jig according to claim 6, wherein the reinforcing portion (80) has a pair of side plates (81p, 81q) each welded to the mounting plate (71) and the support plate (73), and a bottom plate (82) welded to the mounting plate (71) and the support plate (73) and connecting the pair of side plates (81p, 81q).

8. The positioning jig according to claim 7, wherein the bottom plate (82) is inclined to approach the mounting plate (71) as it moves away from the support plate (73) along the sliding direction of the pressing tool (10).

9. A positioning jig (100) for positioning a second precast concrete column (P2) having a plurality of insertion holes (D2) formed on the second surface (F2) into which a plurality of reinforcing bars (D1) protrude from the first surface (F1) of a first precast concrete column (P1), wherein A pressing tool (10) is configured to press the side surface of the second precast concrete column (P2) while capturing at least one of the plurality of reinforcing bars (D1), The second precast concrete column (P2) is provided with a bracket (70) on which the pressing tool (10) is slidably mounted in a direction parallel to the direction in which the pressing tool (10) presses the side surface of the second precast concrete column (P2), The aforementioned pressing tool (10) Hook plate (20) and The nut portion (30) mounted on the hook plate (20), A threaded rod (40) is rotatably screwed onto the nut portion (30), A positioning jig including a pressure pad (60) rotatably attached to one end of the threaded rod (40) on the second precast concrete column (P2) side.

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