Positioning jig, and fixation method for floor panel

Abstract

To provide a positioning jig, and a fixation method for a floor panel, allowing attachment / detachment work of the positioning jig on the floor panel to be efficiently and easily carried out.SOLUTION: A positioning jig 1 is used when fixing a floor panel on a beam member of a building to define a fixation position of the floor panel in accordance with the beam member. The positioning member 1 is provided with an attachment part 2 detachably attached on an attached part arranged on a bottom surface of the floor panel with a bolt BT; and an abutment part 3 defining the fixation position of the floor panel through abutment on a side surface of the beam member. A through hole 4 is formed in the attachment part 2 in an attachment direction. The hole 4 comprises: a plurality of attachment holes 10 for attachment of bolts BT; a passage hole 15 extending so as to communicate the plurality of attachment holes 10 to each other and formed in such a size that a shaft part BT1 of the bolt BT is allowed to pass; and an insertion hole 18 in communication with the passage hole 15 and formed in a size larger than that of the attachment hole 10 and formed in such a size that a head part BT2 of the bolt BT is allowed to be inserted.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a positioning jig and a method for fixing a floor panel, and in particular to a positioning jig used when fixing a floor panel to a beam member of a building, for determining a fixing position of the floor panel selected according to the beam member, and a method for fixing a floor panel to a beam member using the positioning jig. [Background technology]

[0002] Generally, precast concrete slabs (PC slabs) made of cement-based materials such as precast concrete are used as floor panels in buildings such as apartment buildings and commercial facilities. PC slabs are heavier than lightweight aerated concrete slabs (ALC slabs). Therefore, when moving or transporting the PC slab, it is lifted by a crane (see, for example, Patent Document 1). When installing PC decks on beam members that make up the framework of buildings such as apartment buildings and commercial facilities, the PC decks are lifted one by one by a crane and hung close to the beam members. Then, after determining the fixing position of the PC deck to the beam members, the PC deck is fixed to the beam members.

[0003] Conventionally, a positioning jig has been used to determine the fixing position of the PC deck relative to the beam member. The positioning jig is attached with bolts to the mounting part on the bottom surface of the PC deck, and abuts against the beam member to position the PC deck. The building is constructed by first determining the fixing position of the PC deck relative to the beam members using a positioning jig, and then fixing the PC deck to the beam members. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-055835 A Summary of the Invention [Problem to be solved by the invention]

[0005] The positioning jig is used to determine the fixing position of the PC floor slab (floor panel) according to the size of the beam member. The positioning jig has multiple mounting holes formed in positions corresponding to the mounting parts (bolt holes) of the floor panel, for attaching bolts. The positioning jig is detachably attached to the floor panel by aligning a predetermined mounting hole with a bolt hole in the floor panel and attaching a bolt to the bolt hole and the mounting hole.

[0006] However, with conventional positioning jigs, when changing the mounting holes to correspond to the bolt holes of the floor panel, it was necessary to temporarily remove the bolts from the floor panel, change the mounting position of the positioning jig, and then reattach the positioning jig to the floor panel with the bolts. In addition, because the work of attaching the positioning jig to the floor panel is performed above the beam member, the floor panel that was suspended near the beam member had to be lifted again by a crane, which could reduce work efficiency.

[0007] Furthermore, when attaching or detaching the positioning jig to or from the floor panel, the worker had to support the positioning jig with one hand while using a tool to attach or detach the jig bolt with the other hand, which could reduce work efficiency or cause the jig, bolt, tool, etc. to fall out of the worker's hands. In addition, since the positioning jigs were shared among the various construction sites, they needed to be removed from the floor panels immediately after the fixing positions of the floor panels to the beam members were determined.Therefore, there was a demand to remove only the positioning jigs before removing the bolts that were to be stored on-site.

[0008] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a positioning jig and a method for fixing a floor panel that enable efficient and easy attachment and detachment of the positioning jig to a floor panel. [Means for solving the problem]

[0009] The above problem is solved by the positioning jig of the present invention, which is used when fixing a floor panel to a beam member of a building and determines a fixing position of the floor panel according to the beam member, and includes a mounting portion that is detachably attached with a bolt to a mounting portion provided on the bottom surface of the floor panel and extends along the bottom surface of the floor panel, and a contact portion that is provided on the mounting portion and determines the fixing position of the floor panel by abutting against a side surface of the beam member, and the mounting portion has a hole that penetrates in the mounting direction in which the mounting portion is attached to the floor panel, and the hole is formed to correspond to the position of the mounting portion of the floor panel according to the beam member, and has a plurality of mounting holes for attaching the bolts, a through hole that extends to communicate the plurality of mounting holes and is formed to be sized to allow the shaft portion of the bolt to pass through, and an insertion hole that communicates with the through hole, is formed larger than the mounting hole, and is formed to be sized to allow the head of the bolt to pass through. With the above-described configuration, the positioning jig can be easily attached to and detached from the floor panel by inserting the head of the bolt into the insertion hole, thereby improving the efficiency of the work of attaching and detaching the positioning jig to the floor panel. Furthermore, when changing the mounting position of the positioning jig relative to the floor panel, there is no need to attach or detach the bolts from the floor panel, thereby improving work efficiency.

[0010] In this case, the mounting portion has a flat plate shape and extends along the bottom surface of the floor panel, the abutment portion has a flat plate shape and extends from one end in the extension direction of the mounting portion to the opposite side to the floor panel in the mounting direction, the multiple mounting holes have a first mounting hole, a second mounting hole, a third mounting hole and a fourth mounting hole formed at positions spaced apart from each other, and the through hole preferably connects the first mounting hole, the second mounting hole, the third mounting hole and the fourth mounting hole. With the above-mentioned configuration, the floor panel can be easily positioned according to the size of the beam member by communicating the multiple mounting holes. Also, the positioning jig has a flat mounting portion and a contact portion, so that the floor panel can be positioned with a simple configuration.

[0011] In this case, the second mounting hole is formed at a position that does not overlap the first mounting hole in the extension direction of the mounting portion and at a position that does not overlap the first mounting hole in the width direction of the mounting portion, the third mounting hole is formed at a position between the first mounting hole and the second mounting hole in the extension direction and at a position that overlaps the first mounting hole in the extension direction, the fourth mounting hole is formed at a position between the first mounting hole and the third mounting hole in the extension direction and at a position that overlaps the second mounting hole in the extension direction, the through hole has a first through hole that communicates the first mounting hole and the second mounting hole and a second through hole that communicates the third mounting hole and the fourth mounting hole, the first through hole and the second through hole intersect and communicate with each other, and the insertion hole is formed at an intersection portion where the first through hole and the second through hole intersect. With the above-mentioned configuration, the through hole is formed at the intersection, and the through hole can be formed by utilizing the size of the hole portion where the through hole intersects with the through hole. Therefore, the overall shape of the through hole can be made small, and the positioning jig can be made compact.

[0012] In this case, the intersection portion is preferably formed at a position between the first mounting hole and the second mounting hole in the extension direction, and at a position between the first mounting hole and the second mounting hole in the width direction. With the above-mentioned configuration, the distance between the insertion hole and each mounting hole is short, so that regardless of which mounting hole is selected, the positioning jig can be easily attached and detached from the floor panel through the insertion hole.

[0013] In this case, the first passage hole has a first straight portion extending in the width direction from the first mounting hole, a second straight portion extending in the width direction from the second mounting hole, and a first inclined portion extending diagonally with respect to the width direction and connecting the first straight portion and the second straight portion, the second passage hole has a third straight portion extending in the width direction from the third mounting hole, a fourth straight portion extending in the width direction from the fourth mounting hole, and a second inclined portion extending diagonally with respect to the width direction and connecting the third straight portion and the fourth straight portion, and the insertion hole is preferably formed at the intersection portion where the first inclined portion and the second inclined portion intersect. With the above configuration, the straight section where the mounting holes are located and the inclined section where the through holes are located have different shapes, making it easier to recognize the positions of the mounting holes and the through holes. Therefore, it is easier to move to any mounting hole or through hole without having to visually check what is nearby, improving workability.

[0014] In this case, the second mounting hole is formed at a position that does not overlap the first mounting hole in the extension direction and does not overlap the first mounting hole in the width direction of the mounting portion, the third mounting hole is formed at a position between the first mounting hole and the second mounting hole in the extension direction and at a position that overlaps the first mounting hole in the extension direction, the fourth mounting hole is formed at a position between the first mounting hole and the third mounting hole in the extension direction and at a position that overlaps the second mounting hole in the extension direction, the through hole extends in the extension direction to connect the first mounting hole, the second mounting hole, the third mounting hole and the fourth mounting hole, and the insertion hole is formed at one end of the through hole in the extension direction. With the above configuration, when changing the mounting position of the positioning jig relative to the floor panel, it is possible to prevent the bolt from falling out of the insertion hole while passing the bolt through the passage hole.

[0015] According to the floor panel fixing method of the present invention, the above problem is solved by including a jig attachment process of attaching the positioning jig to the floor panel with the bolt, a positioning process of abutting the abutment portion of the positioning jig against the beam member to determine the fixed position of the floor panel relative to the beam member, a jig removal process of removing the positioning jig from the floor panel, and a floor panel fixing process of fixing the floor panel to the beam member, wherein in the jig removal process, the positioning jig is removed from the bolt while the bolt is attached to the floor panel. With the above configuration, when removing the positioning jig from the floor panel, the positioning jig can be pulled downward from the bolt through the insertion hole while the bolt is attached to the floor panel. Therefore, the worker does not need to remove the bolt with one hand while supporting the positioning jig, which improves work efficiency. Also, the positioning jig can be removed first while the bolt is still attached to the floor panel.

[0016] The above problem is solved by the floor panel fixing method of the present invention, which includes a jig attachment process of attaching the positioning jig to the floor panel with the bolt, a positioning process of abutting the abutment portion of the positioning jig against the beam member to determine the fixed position of the floor panel relative to the beam member, a jig removal process of removing the positioning jig from the floor panel, and a floor panel fixing process of fixing the floor panel to the beam member, and in the jig attachment process, it is preferable that the positioning jig is attached to the bolt with the bolt attached to the floor panel. With the above configuration, when attaching the positioning jig to the floor panel, the positioning jig can be attached to the floor panel by fitting the insertion hole onto the temporarily fixed bolt and moving it in the perpendicular direction with the bolt attached to the floor panel. Therefore, the worker does not need to attach the bolt with one hand while supporting the positioning jig, improving work efficiency. Effect of the Invention

[0017] According to the positioning jig and floor panel fixing method of the present invention, the work of attaching and detaching the positioning jig to the floor panel can be performed efficiently and easily. [Brief description of the drawings]

[0018] [Figure 1] 13A and 13B are diagrams showing the state in which a floor panel is installed on a beam member. [Diagram 2] 13 is a diagram showing the state in which the floor panel is positioned relative to the beam member. FIG. [Diagram 3] 13 is a diagram showing the state after the positioning jig has been removed and the floor panel has been fixed to the beam member. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 1 is a process diagram of a method for fixing a floor panel. [Figure 8] FIG. 11 is a rear view of the positioning jig of the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. This embodiment relates to a positioning jig that is used when fixing a floor panel to a beam member of a building and determines the fixing position of the floor panel according to the beam member, and that allows the positioning jig to be attached and detached to the floor panel efficiently and easily.

[0020] In the following explanation, the "vertical direction" refers to the vertical direction when the floor panel is installed on the beam member as shown in Figure 1. The "installation direction" refers to the direction in which the positioning jig is installed on the floor panel, and coincides with the "vertical direction." Note that the direction in which the positioning jig is installed on the floor panel is the "upward direction," and the direction in which the positioning jig is removed from the floor panel is the "downward direction." The "extension direction" is the direction in which the positioning jig extends along the bottom surface of the floor panel, which is the "front-rear direction" shown in Figure 1. The "extension direction" is also the direction in which the floor panel abuts against the beam member. The direction in which the floor panel approaches the beam member is called the "front direction," and the direction in which the floor panel moves away from the beam member is called the "rear direction." 1. Moreover, the "width direction" is a direction perpendicular to the "up-down direction" and the "extension direction", and corresponds to the "left-right direction" shown in FIG. The "extension direction" and the "width direction" are "orthogonal directions" perpendicular to the "mounting direction".

[0021] <Overall configuration of positioning jig> 1 to 3, a positioning jig 1 of this embodiment is used when fixing a floor panel P to a beam member B of a building. The positioning jig 1 determines a fixing position of the floor panel P according to the size of the beam member B. The positioning jig 1 is attached to the bottom surface of the floor panel P suspended by the crane C. Specifically, the positioning jig 1 is attached with bolts BT to the bottom surface of the beam member B side to which the floor panel P is to be constructed. Then, the positioning jig 1 attached to the floor panel P is abutted against the beam member B, thereby determining the fixed position of the floor panel P relative to the beam member B. Then, the positioning jig 1 and the bolts BT are removed from the floor panel P, and the floor panel P is fixed to the beam member B with the fixing bolts BF and the fasteners F, thereby constructing the floor panel P.

[0022] <Beams and floor panels> Here, the beam member B and the floor panel P will be described. 1 to 3, the beam member B is a steel beam member made of, for example, H-shaped steel. On the upper surface of the flange B1 of the beam member B, a buffer material R made of an elastic material such as rubber is provided. The floor panel P is, for example, a precast concrete floor slab (PCa floor slab, PCa panel). Panel holes P1 into which bolts BT and fixing bolts BF are inserted are formed in the bottom surface of the floor panel P. A plurality of panel holes P1 are formed in the end portion of the beam member B to which the floor panel P is constructed.

[0023] The floor panel P is lifted above the beam member B by a crane C, and a positioning jig 1 is attached to it. As shown in Fig. 1, the floor panel P, with the positioning jig 1 attached, is lifted down by the crane C to a position near the beam member B. As shown in Fig. 2, the floor panel P is positioned by the positioning jig 1, and placed on the upper surface of the flange B1 of the beam member B via a buffer material R. As shown in Fig. 3, the positioning jig 1 and bolt BT are removed from the floor panel P, and the floor panel P is fixed to the beam member B by a fixing bolt BF and a fixing tool F. Although the positioning jig 1 is attached to one end of the short side of the floor panel P, it may also be attached to one end of the long side of the floor panel P.

[0024] The fixing bolt BF is, for example, a double-ended bolt, and is fixed in the panel hole P1 as shown in FIG. The fastener F is a metal fitting for fixing the floor panel P to the beam member B. The fastener F is attached to a fixing bolt BF and bolted. The fastener F is positioned so that it abuts against the underside of the flange B1 of the beam member B. The floor panel P is fixed to the beam member B by sandwiching the flange B1 between the fastener F and the floor panel P.

[0025] <Positioning jig> As shown in Fig. 4, the positioning jig 1 has an L-shaped cross section and is formed, for example, by pressing a metal plate. The positioning jig 1 is mainly composed of a mounting part 2 that is detachably attached to the bottom surface of the floor panel P with a bolt BT, and a contact part 3 that is provided on the mounting part 2 and abuts against a beam member B to determine the fixed position of the floor panel P. A hole 4 is formed in the mounting part 2, penetrating in the mounting direction (up and down direction) in which the mounting part 2 is attached to the floor panel P.

[0026] <Mounting part> The mounting portion 2 is a portion that is detachably attached to the floor panel P by a jig bolt BT that is inserted into a panel hole P1 (corresponding to a portion to be attached) formed in the bottom surface of the floor panel P. As shown in Fig. 4, the mounting portion 2 is a flat, rectangular metal plate that is elongated in the left-right direction. The mounting portion 2 extends in the front-rear direction along the bottom surface of the floor panel P. An abutment portion 3 is provided at the front end of the mounting portion 2. The mounting portion 2 is also formed with a pair of holes 4 extending in the left-right direction and penetrating therethrough in the mounting direction.

[0027] <Contact part> As shown in Fig. 2, the contact portion 3 is a portion that contacts the side surface of the beam member B to determine the fixed position of the floor panel P. As shown in Fig. 4, the contact portion 3 is provided at the front end portion of the mounting portion 2 and extends downward. The contact portion 3 is a flat, rectangular metal plate that is long in the left-right direction. A rope hole 3a penetrating in the extension direction (thickness direction of the abutment part 3) is formed in the abutment part 3. The rope hole 3a is a hole for inserting a surrender rope (not shown) used when the floor panel P is hoisted down to a position near the beam member B by the crane C.

[0028] <hole> 2, hole 4 is a through hole that has a substantially swastika shape when viewed from above and penetrates in the mounting direction. Two holes 4 are formed side by side in the left-right direction in mounting portion 2. Since hole 4 is formed in the central portion of mounting portion 2, the strength of positioning jig 1 can be improved compared to holes 4 formed at the end portions of mounting portion 2. Specifically, as shown in Fig. 5, the hole 4 has a plurality of mounting holes 10 (first mounting hole 11, second mounting hole 12, third mounting hole 13, fourth mounting hole 14) for mounting the bolt BT, a plurality of through holes 15 (first through hole 16, second through hole 17) through which the shaft portion BT1 of the bolt BT can pass, and an insertion hole 18 through which the head portion BT2 of the bolt BT can be inserted. The plurality of mounting holes 10 include the first mounting hole 11, the second mounting hole 12, the third mounting hole 13, and the fourth mounting hole 14 formed at positions spaced apart from one another. The first mounting hole 11, the second mounting hole 12, the third mounting hole 13, the fourth mounting hole 14, the first through hole 16, the second through hole 17, and the insertion hole 18 communicate with one another to form one hole 4.

[0029] The number and positions of the holes 4 are not limited to this and can be changed as appropriate to correspond to the panel hole P1. The shape of the holes 4 is not limited to a swastika shape. For example, the shape of the holes 4 may be a cross shape, an X shape, a Z shape, an H shape, a Y shape, an I shape, etc. Furthermore, the number of mounting holes 10 in one hole 4 is not limited to four and may be two, three, or five or more. The number of passing holes 15 in one hole 4 is not limited to two and may be one or three or more. The number of insertion holes 18 in one hole 4 is not limited to one and may be two or more.

[0030] The mounting holes 10 are formed to correspond to the positions of the panel holes P1 of the floor panel P corresponding to the beam member B. The mounting holes 10 to be used in the positioning jig 1 are selected according to the size of the beam member B (the size of the floor panel P) at the construction site. In this embodiment, four mounting holes 10 are provided in pairs in the left-right direction to correspond to four types of sizes of beam members B. The mounting portion 2 is provided with a plurality of mounting holes 10 corresponding to the sizes of a plurality of types of beam members B. Since the plurality of mounting holes 10 are connected to one another by the through holes 15, it is possible to easily change the mounting holes 10 to which the bolts BT are attached via the through holes 15. Therefore, the position of the positioning jig 1 relative to the floor panel P can be easily changed according to the size of the beam member B.

[0031] As shown in Fig. 4, the first mounting hole 11 penetrates in the mounting direction and is formed with a size that allows the bolt BT to be attached and detached. The second mounting hole 12 is formed at a position spaced apart from the first mounting hole 11 and is formed with a size that allows the bolt BT to be attached and detached. The third mounting hole 13 penetrates in the mounting direction and is formed at a position spaced apart from the first mounting hole 11 and the second mounting hole 12 and is formed with a size that allows the bolt BT to be attached and detached. The fourth mounting hole 14 penetrates in the mounting direction and is formed at a position spaced apart from the first mounting hole 11, the second mounting hole 12 and the third mounting hole 13 and is formed with a size that allows the bolt BT to be attached and detached. In other words, the first mounting hole 11, the second mounting hole 12, the third mounting hole 13 and the fourth mounting hole 14 are each formed to be larger than the shaft portion BT1 of the bolt BT and smaller than the head portion BT2 of the bolt BT.

[0032] The arrangement of the mounting holes 10 will be described with reference to Fig. 5. Since the pair of left and right holes 4 have the same shape, the mounting hole 10 in the right hole 4 will be described. The first mounting hole 11 is formed in the mounting portion 2 at a position closest to the abutment portion 3. The second mounting hole 12 is formed in a position not overlapping with the first mounting hole 11 in the extension direction (front-rear direction) in which the abutment portion 3 abuts against the beam member B, and not overlapping with the first mounting hole 11 in the width direction (left-right direction) perpendicular to the mounting direction and the extension direction. The third mounting hole 13 is formed in a position between the first mounting hole 11 and the second mounting hole 12 in the extension direction, and at a position overlapping with the first mounting hole 11 in the extension direction. The fourth mounting hole 14 is formed in a position between the first mounting hole 11 and the third mounting hole 13 in the extension direction, and at a position overlapping with the second mounting hole 12 in the extension direction. In other words, the first mounting hole 11 and the third mounting hole 13 are arranged side by side in the extension direction, and the second mounting hole 12 and the fourth mounting hole 14 are arranged side by side in the extension direction. Also, the first mounting hole 11, the second mounting hole 12, the third mounting hole 13, and the fourth mounting hole 14 are arranged at positions that do not overlap with one another in the width direction.

[0033] 5 and 6, the through hole 15 is a hole portion that penetrates in the mounting direction and extends in a perpendicular direction (extension direction or width direction) perpendicular to the mounting direction to communicate with the first mounting hole 11, the second mounting hole 12, the third mounting hole 13, and the fourth mounting hole 14. The through hole 15 is formed to a size that allows the shaft portion BT1 of the bolt BT attached to the floor panel P to pass through. In other words, the width of the through hole 15 is formed to be approximately the same as the diameter of the mounting hole 10. The through hole 15 has a first through hole 16 that communicates the first mounting hole 11 and the second mounting hole 12, and a second through hole 17 that communicates the third mounting hole 13 and the fourth mounting hole 14. The first through hole 16 and the second through hole 17 cross each other in the perpendicular direction and communicate with each other. In other words, the through hole 15 has an intersection portion 15a where the first through hole 16 and the second through hole 17 cross each other.

[0034] 5, intersection 15a is formed at a position between first mounting hole 11 and second mounting hole 12 in the extension direction and at a position between first mounting hole 11 and second mounting hole 12 in the width direction. Intersection 15a is also formed at a position between third mounting hole 13 and fourth mounting hole 14 in the extension direction and at a position between third mounting hole 13 and fourth mounting hole 14 in the width direction. In other words, intersection 15a is formed in the center portion of hole 4. The intersecting portion 15a is disposed at a position at a substantially constant distance from each mounting hole 10, but is not limited to this. For example, the intersecting portion 15a may be disposed at a position close to one mounting hole 10. Also, the intersecting portion 15a may be disposed outward from the four mounting holes 10 in the orthogonal direction.

[0035] 6, the first passage hole 16 has a first straight portion 16a extending from the first mounting hole 11 to the left in the width direction, a second straight portion 16b extending from the second mounting hole 12 to the right in the width direction, and a first inclined portion 16c extending obliquely with respect to the width direction and connecting the left end of the first straight portion 16a and the right end of the second straight portion 16b. The first straight portion 16a and the second straight portion 16b extend parallel to each other.

[0036] 6, the second passage hole 17 has a third straight portion 17a extending from the third mounting hole 13 to the right in the width direction, a fourth straight portion 17b extending from the fourth mounting hole 14 to the left in the width direction, and a second inclined portion 17c extending obliquely with respect to the width direction and connecting the right end of the third straight portion 17a and the left end of the fourth straight portion 17b. The third straight portion 17a and the fourth straight portion 17b extend parallel to each other.

[0037] The hole 4 is composed of a first straight portion 16a, a second straight portion 16b, a first inclined portion 16c, a third straight portion 17a, a fourth straight portion 17b, and a second inclined portion 17c, and has a straight portion where the mounting hole 10 is disposed and an inclined portion where the insertion hole 18 is disposed. Therefore, the positions of the mounting hole 10 and the insertion hole 18 can be easily recognized. Therefore, the user can move from a predetermined mounting hole 10 to an arbitrary mounting hole 10 without visually checking the area in front of him / her, thereby improving workability.

[0038] 6, the intersection 15a is formed at a portion where the first inclined portion 16c and the second inclined portion 17c intersect in the perpendicular direction. A first protrusion 10a protruding forward from the rear end of the third straight portion 17a and a second protrusion 10b protruding backward from the front end of the fourth straight portion 17b are formed in the mounting portion 2 at a portion surrounding the intersection 15a.

[0039] For example, when an operator moves the bolt BT from the third mounting hole 13 to the second mounting hole 12, the bolt BT passing through the second passage hole 17 gets caught on the first protrusion 10a. Therefore, the position of the second mounting hole 12 can be easily recognized. Also, when an operator moves the bolt BT from the fourth mounting hole 14 to the first mounting hole 11, the bolt BT passing through the second passage hole 17 gets caught on the second protrusion 10b. Therefore, the position of the first mounting hole 11 can be easily recognized. By forming the first protrusion 10a and the second protrusion 10b, a worker holding the positioning jig 1 can move it to any mounting hole 10 without visually checking his / her surroundings. Therefore, workability can be improved.

[0040] 5 and 6, the insertion hole 18 is a hole that penetrates in the mounting direction and communicates with the through hole 15. The insertion hole 18 is formed larger than the mounting hole 10 and is formed to a size that allows the head BT2 of the bolt BT to be inserted therethrough. In other words, the width of the insertion hole 18 is formed larger than the width of the through hole 15 and the diameter of the head BT2 of the bolt BT. The insertion hole 18 is formed at an intersection 15a where the first through hole 16 and the second through hole 17 intersect. By forming the insertion hole 18 at the intersection 15a, the hole portion of the through hole 15 can be used to form the insertion hole 18. Therefore, the overall shape of the hole 4 can be made smaller than if the insertion hole 18 were formed at a position different from the through hole 15. Therefore, the positioning jig 1 can be made smaller in size. In addition, because the intersecting portion 15a is disposed in the center of the hole 4 at a substantially constant distance from each mounting hole 10, the distance between the insertion hole 18 and each mounting hole 10 is short. Therefore, regardless of which mounting hole 10 is selected, the positioning jig 1 can be easily attached to and detached from the floor panel P.

[0041] When the positioning jig 1 is attached to the floor panel P, the insertion hole 18 is fitted into the temporarily fixed head BT2 by an operator. Then, the positioning jig 1 is moved in the orthogonal direction by the operator so that the bolt BT moves from the insertion hole 18 through the passage hole 15 to an arbitrary mounting hole 10. The positioning jig 1 is attached to the floor panel P by tightening a bolt BT aligned with the position of any one of the mounting holes 10.

[0042] In addition, when it is desired to change the mounting position of the positioning jig 1 relative to the floor panel P, the positioning jig 1 is moved in the perpendicular direction by the worker so that the bolt BT moves from the specified mounting hole 10 through the through hole 15 to any desired mounting hole 10. The positioning jig 1 is attached to the floor panel P by tightening a bolt BT aligned with the position of any one of the mounting holes 10.

[0043] In addition, when the positioning jig 1 is removed from the floor panel P, the positioning jig 1 is moved in the perpendicular direction by the worker so that the bolt BT moves from any mounting hole 10 through the through hole 15 to the insertion hole 18. Then, with the head BT2 aligned with the position of the insertion hole 18, the positioning jig 1 is pulled downward by an operator, and is removed from the floor panel P and the bolt BT.

[0044] In this way, by inserting the heads BT2 of the bolts BT into the insertion holes 18, the positioning jig 1 can be easily attached to and detached from the floor panel P. Therefore, the efficiency of the work of attaching and detaching the positioning jig 1 to the floor panel P can be improved. Furthermore, even when changing the attachment position of the positioning jig 1 relative to the floor panel P, work efficiency can be improved since there is no need to attach and detach the bolts BT from the floor panel P. In detail, the worker can easily change the attachment position of the positioning jig 1 by simply moving the positioning jig 1 in the perpendicular direction relative to the floor panel P via the passage hole 15.

[0045] <How to fix floor panels using a positioning jig> Next, a method for fixing the floor panel P using the positioning jig 1 will be described with reference to FIG. 7, this method includes at least a "floor panel lifting step (S1)" of lifting a floor panel P with a crane C, a "jig mounting step (S2)" of attaching a positioning jig 1 to the floor panel P with bolts BT, a "positioning step (S3)" of determining a fixing position of the floor panel P relative to the beam member B, a "jig removal step (S4)" of removing the positioning jig 1 from the floor panel P, and a "floor panel fixing step (S5)" of fixing the floor panel P to the beam member B. These steps will be explained in detail below. It should be noted that explanations of other steps involved in the fixing work of the floor panel P will be omitted.

[0046] In the "floor panel lifting process (S1)", a worker operates the crane C to lift up the floor panel P. The floor panel P is lifted up to a position above the beam member B by the lifting operation of the crane C.

[0047] In the "jig attachment process (S2)", a worker attaches the positioning jig 1 to the bottom surface of the floor panel P with the bolt BT. The worker attaches the positioning jig 1 to the bolt BT at a position above the beam member B, with the bolt BT attached to the floor panel P. Specifically, the worker first inserts the shaft portion BT1 of the bolt BT into the panel hole P1 of the floor panel P, and temporarily fixes the bolt BT. Then, after attaching the bolt BT to the floor panel P, the worker grasps the abutment portion 3 of the positioning jig 1, and fits the temporarily fixed head portion BT2 into the insertion hole 18. The worker moves the positioning jig 1 in the orthogonal direction so that the bolt BT moves from the insertion hole 18 through the passage hole 15 to any mounting hole 10. Then, the worker attaches the positioning jig 1 to the floor panel P by tightening the bolt BT aligned with the position of any of the mounting holes 10.

[0048] In this way, when attaching the positioning jig 1 to the floor panel P, the positioning jig 1 can be attached to the floor panel P by fitting the temporarily fixed bolt BT into the insertion hole 18 and moving it in the perpendicular direction. Therefore, the worker does not need to attach the bolt BT with the other hand while supporting the positioning jig 1, improving work efficiency.

[0049] In the "positioning process (S3)", a worker abuts the abutment portion 3 of the positioning jig 1 against the beam member B to determine the fixed position of the floor panel P relative to the beam member B. Specifically, the worker uses a crane C to suspend and lower the floor panel P, to which the positioning jig 1 is attached, from a position above the beam member B to a position near the beam member B. Then, the worker abuts the abutment portion 3 of the positioning jig 1 against the beam member B while adjusting the position of the floor panel P with the intermediary rope inserted through the rope hole 3a. The worker places the floor panel P on top of the buffer material R provided on the upper surface of the flange B1 of the beam member B.

[0050] Here, if it is desired to change the mounting position of the positioning jig 1 relative to the floor panel P, the worker loosens the bolt BT and moves the positioning jig 1 in the perpendicular direction so that the bolt BT moves from a predetermined mounting hole 10 through the passage hole 15 to an arbitrary mounting hole 10. Then, the worker tightens the bolt BT aligned with the position of the arbitrary mounting hole 10, and attaches the positioning jig 1 to the floor panel P.

[0051] In this way, even when it is desired to change the attachment position of the positioning jig 1 relative to the floor panel P, there is no need to attach and detach the bolts BT from the floor panel P. For example, even if the attachment position is mistaken when the floor panel P is lowered to a position near the beam member B, the attachment position of the positioning jig 1 can be easily changed while remaining in the vicinity of the beam member B without having to lift it above the beam member B again with the crane C.

[0052] In the "jig removal process (S4)", the positioning jig 1 is removed from the floor panel P with the bolts BT attached to the floor panel P. Specifically, the worker loosens the bolt BT and moves the positioning jig 1 in the perpendicular direction so that the bolt BT moves from a predetermined mounting hole 10 through the passage hole 15 to the insertion hole 18. Then, the worker pulls out the positioning jig 1 downward from the head part BT2 through the insertion hole 18. Thereafter, the worker removes the bolt BT from the floor panel P.

[0053] In this way, when removing the positioning jig 1 from the floor panel P, the positioning jig 1 can be pulled downward from the bolt BT through the insertion hole 18. Therefore, the worker does not need to remove the bolt BT with one hand while supporting the positioning jig 1, improving work efficiency.

[0054] In the "floor panel fixing process (S5)", a worker fixes the floor panel P to the beam member B. Specifically, the worker fixes the fixing bolt BF into the panel hole P1. The worker attaches the fixing tool F to the fixing bolt BF and abuts it against the flange B1 of the beam member B from below. The worker then bolts the fixing tool F to the floor panel P.

[0055] In the "jig attachment process (S2)", an example has been described in which the worker attaches the bolt BT to the floor panel P and then attaches the positioning jig 1 to the bolt BT, but this is not limiting. For example, the worker may attach the positioning jig 1 to the floor panel P by tightening a bolt BT aligned with the position of an arbitrary mounting hole 10 while supporting the positioning jig 1. In addition, in the "jig attachment process (S2)", the worker attaches the positioning jig 1 to the floor panel P at a position above the beam member B, but this is not limited to this. For example, the worker may attach the positioning jig 1 to the floor panel P at a position near the beam member B, or may attach the positioning jig 1 to the floor panel P while the floor panel P is being lifted up to a position above the beam member B.

[0056] In addition, in the "jig removal process (S4)", an example has been described in which the worker removes the bolt BT from the floor panel P after removing the positioning jig 1 from the floor panel P, but this is not limited to this. For example, the worker may remove the bolt BT and the positioning jig 1 from the floor panel P while supporting the positioning jig 1.

[0057] Second Embodiment Next, a positioning jig 1A according to a second embodiment will be described with reference to Fig. 8. Note that a description of the configuration overlapping with the above-described positioning jig 1 will be omitted. Specifically, the shape of a hole 4A formed in a mounting portion 2A of a positioning jig 1A is different from that in the first embodiment.

[0058] 8, the hole 4A has a first mounting hole 11A, a second mounting hole 12A, a third mounting hole 13A, a fourth mounting hole 14A, a through hole 15A through which the shank BT1 of the bolt BT can pass, and an insertion hole 18A through which the head BT2 of the bolt BT can be inserted. The first mounting hole 11A, the second mounting hole 12A, the third mounting hole 13A, the fourth mounting hole 14A, the through hole 15A, and the insertion hole 18A are in communication with each other to form one hole 4A. The arrangement of the first mounting hole 11A, the second mounting hole 12A, the third mounting hole 13A, and the fourth mounting hole 14A is the same as in the first embodiment, so a description thereof will be omitted.

[0059] As shown in FIG. 8, the through hole 15A extends in the extension direction so as to communicate the first mounting hole 11A, the second mounting hole 12A, the third mounting hole 13A, and the fourth mounting hole 14A. The through hole 18A is formed at an end of the passage hole 15 in the extension direction. The through hole 18A is disposed in front of the fourth mounting hole 14A. In other words, the through hole 18A, the second mounting hole 12A, and the fourth mounting hole 14A are disposed side by side in the extension direction. Furthermore, the through hole 18A, the first mounting hole 11A, the second mounting hole 12A, the third mounting hole 13A, and the fourth mounting hole 14A are disposed at positions that do not overlap one another in the width direction.

[0060] In this way, the insertion hole 18A is formed at the end in the extension direction of the through hole 15. Therefore, when changing the attachment position of the positioning jig 1 with respect to the floor panel P, it is possible to prevent the bolt BT from coming out of the insertion hole 18A while passing through the through hole 15A.

[0061] <Other embodiments> The positioning jig 1 of the present invention is not limited to the above embodiment. In this embodiment, the floor panel P to be installed on the beam member B is a precast concrete floor slab. However, the present invention is not limited to this, and the floor panel P is also suitable for a cement panel such as an aerated concrete (ALC).

[0062] In the above embodiment, the positioning jig according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. The present invention can be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof. In particular, the above-described embodiment is merely an example and does not limit the present invention. [Explanation of symbols]

[0063] 1, 1A Positioning jig 2, 2A mounting part 3 Contact part 3a Rope hole 4, 4A hole 10 Mounting hole 10a First protrusion 10b Second protrusion 11, 11A First mounting hole 12, 12A Second mounting hole 13, 13A Third mounting hole 14, 14A Fourth mounting hole 15, 15A passing hole 15a Intersection 16 First passage hole 16a First straight section 16b Second straight section 16c First slope 17 Second passage hole 17a Third straight section 17b Fourth straight section 17c Second slope 18, 18A Insertion hole B Beam member B1 flange P Floor Panel P1 Panel hole (mounting part) BT Bolt BT1 shaft part BT2 head BF Fixing bolt F Fixture R Cushioning material C Crane

Claims

1. A positioning jig used when fixing a floor panel to a beam member of a building, for determining a fixing position of the floor panel according to the beam member, a mounting portion that is detachably attached to a mounting portion provided on a bottom surface of the floor panel by a bolt and extends along the bottom surface of the floor panel; a contact portion that is provided on the mounting portion and contacts a side surface of the beam member to determine the fixed position of the floor panel, The mounting portion is formed with a hole passing therethrough in a mounting direction in which the mounting portion is mounted to the floor panel, The hole is a plurality of mounting holes for mounting the bolts, the mounting holes being formed in correspondence with positions of the mounting portions of the floor panel corresponding to the beam members; a through hole extending to communicate with the plurality of mounting holes and formed in a size allowing a shank of the bolt to pass therethrough; a through hole that communicates with the through hole, is larger than the mounting hole, and is sized to allow the head of the bolt to pass therethrough.

2. The mounting portion has a flat plate shape and extends along the bottom surface of the floor panel, The abutment portion has a flat plate shape and extends from one end in an extension direction of the mounting portion to a side opposite to the floor panel in the mounting direction, the plurality of mounting holes include a first mounting hole, a second mounting hole, a third mounting hole, and a fourth mounting hole that are formed at positions spaced apart from one another; The positioning jig according to claim 1 , wherein the through hole communicates the first mounting hole, the second mounting hole, the third mounting hole, and the fourth mounting hole.

3. the second mounting hole is formed at a position not overlapping with the first mounting hole in the extension direction of the mounting portion and at a position not overlapping with the first mounting hole in a width direction of the mounting portion, the third mounting hole is formed at a position between the first mounting hole and the second mounting hole in the extension direction and at a position overlapping the first mounting hole in the extension direction, the fourth mounting hole is formed at a position between the first mounting hole and the third mounting hole in the extension direction and at a position overlapping with the second mounting hole in the extension direction, the passage hole includes a first passage hole that communicates the first mounting hole and the second mounting hole, and a second passage hole that communicates the third mounting hole and the fourth mounting hole, The first passage hole and the second passage hole cross and communicate with each other, The positioning jig according to claim 2 , wherein the insertion hole is formed at an intersection where the first passage hole and the second passage hole intersect.

4. The positioning jig described in claim 3, characterized in that the intersection portion is formed at a position between the first mounting hole and the second mounting hole in the extension direction and at a position between the first mounting hole and the second mounting hole in the width direction.

5. the first passage hole has a first straight portion extending in the width direction from the first mounting hole, a second straight portion extending in the width direction from the second mounting hole, and a first inclined portion extending obliquely with respect to the width direction and connecting the first straight portion and the second straight portion, the second passage hole has a third straight portion extending in the width direction from the third mounting hole, a fourth straight portion extending in the width direction from the fourth mounting hole, and a second inclined portion extending obliquely with respect to the width direction and connecting the third straight portion and the fourth straight portion, The positioning jig according to claim 4 , wherein the insertion hole is formed at an intersection where the first inclined portion and the second inclined portion intersect.

6. the second mounting hole is formed at a position not overlapping with the first mounting hole in the extension direction and at a position not overlapping with the first mounting hole in a width direction of the mounting portion, the third mounting hole is formed at a position between the first mounting hole and the second mounting hole in the extension direction and at a position overlapping with the first mounting hole in the extension direction, the fourth mounting hole is formed at a position between the first mounting hole and the third mounting hole in the extension direction and at a position overlapping with the second mounting hole in the extension direction, the through hole extends in the extension direction and communicates with the first mounting hole, the second mounting hole, the third mounting hole, and the fourth mounting hole; The positioning jig according to claim 2 , wherein the insertion hole is formed at one end of the passage hole in the extending direction.

7. A method for fixing a floor panel to a beam member using the positioning jig according to claim 1, a jig attachment process of attaching the positioning jig to the floor panel with the bolts; a positioning step of abutting the abutment portion of the positioning jig against the beam member to determine the fixed position of the floor panel relative to the beam member; a jig removing process of removing the positioning jig from the floor panel; a floor panel fixing step of fixing the floor panel to the beam member, A method for fixing a floor panel, wherein in the jig removal step, the positioning jig is removed from the bolt with the bolt remaining attached to the floor panel.

8. A method for fixing a floor panel to a beam member using the positioning jig according to claim 1, a jig attachment process of attaching the positioning jig to the floor panel with the bolts; a positioning step of abutting the abutment portion of the positioning jig against the beam member to determine the fixed position of the floor panel relative to the beam member; a jig removing process of removing the positioning jig from the floor panel; a floor panel fixing step of fixing the floor panel to the beam member, A method for fixing a floor panel, characterized in that in the jig attachment step, the positioning jig is attached to the bolt with the bolt attached to the floor panel.

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