JP6370248B2 - Ceiling structure repair method and positioning jig used therefor - Google Patents

Description

  The present invention relates to a method for repairing a ceiling structure and a positioning jig used therefor, for example, a repair method for reinforcing the earthquake resistance of the ceiling structure, and a position of a support member provided on the surface side of the ceiling structure for the repair. And a positioning jig for determining the position.

  The suspended ceiling is composed of a plurality of suspension bolts suspended from a beam or slab, a plurality of field receivers supported by the lower ends of the suspension bolts, and a field receiver in a state of crossing the field receiver. A plurality of field edges attached to the ceiling, and a ceiling board fixed to the field edges. The field receiver that constitutes the suspension ceiling is supported by the suspension bolt in a state of being fitted into a hanger or the like attached to the lower end of the suspension bolt. Further, the field edge is attached to the field edge receiver by a clip or the like at the intersection with the field edge receiver.

  However, in such suspended ceilings, if there is a large-scale earthquake, the hanger that connects the suspension bolt and the field guard and the clip that connects the field receiver to the field edge may come off and the ceiling board may fall. Therefore, various measures are taken to strengthen the earthquake resistance of suspended ceilings. For example, Patent Documents 1 to 3 describe this suspension ceiling seismic strengthening repair technique. A support member that supports the ceiling plate is provided on the surface (ceiling surface) of the ceiling plate, and the support member is perforated in the ceiling plate. A structure for connecting to a suspension bolt on the back surface side of the ceiling plate through the formed through hole is disclosed.

JP 2014-70470 A JP 2014-201887 A JP2013-87530A

  However, in the above-described Patent Documents 1 to 3, when repairing the ceiling structure, when the support member that supports the ceiling structure is installed on the surface of the ceiling panel, the suspension from the surface side of the ceiling panel to the back side of the ceiling panel is performed. Since it is difficult to specify the position of the bolt, there is a problem that it is difficult to determine the installation position of the support member.

  The present invention has been made from the technical background described above, and an object of the present invention is to provide a technique capable of easily determining the installation position of the support member that supports the ceiling structure in the repair of the ceiling structure. The purpose is to do.

  In order to solve the above-described problem, the method for repairing a ceiling structure according to claim 1 of the present invention is configured such that the position of a suspension bolt provided to support the ceiling member on the building frame on the back surface side of the ceiling member is A step of specifying using a positioning jig from the surface side of the ceiling member, a step of drilling a through hole at the position of the suspension bolt on the surface of the ceiling member, and a part of the surface of the ceiling member so as to cover A support member having a portion projecting outward from the outer periphery of the through-hole, and a step of connecting the suspension bolt to the suspension bolt through the through-hole, and the positioning jig can fit the suspension bolt A first exploration part having a groove and a second exploration part provided to face the first exploration part and having a groove-like or hole-like positioning part at a position facing the groove of the first exploration part And the exploration part The step of identifying the position of the suspension bolt with the use of a jig is a step of arranging the first exploration portion on the back surface side of the ceiling member and disposing the second exploration portion on the surface side of the ceiling member. And the position of the suspension bolt on the back side of the ceiling member is determined by the position of the positioning portion of the second exploration portion when the suspension bolt is fitted in the groove of the first exploration portion. And a step of identifying from the surface side.

  Further, in the present invention described in claim 2, in the invention described in claim 1, the first exploration portion of the positioning jig is configured to induce the suspension bolt to enter the groove. An inclined portion that is inclined so as to spread from the groove toward the edge of the first exploration portion is formed.

  Moreover, the positioning jig used for the method for repairing a ceiling structure of the present invention according to claim 3 is configured to fit a suspension bolt provided to support the ceiling member in a building frame on the back side of the ceiling member. A first exploration part having a groove capable of being provided, and a groove-like or hole-like positioning part provided at a position facing the groove of the first exploration part. A second exploration portion having the first exploration portion disposed on the back surface side of the ceiling member, and the second exploration portion disposed on the front surface side of the ceiling member. Depending on the position of the positioning portion of the second exploration portion when the suspension bolt is fitted in the groove of the exploration portion of 1, the position of the suspension bolt on the back surface side of the ceiling member is the surface side of the ceiling member It can be specified from the following.

  Further, in the present invention described in claim 4, in the invention described in claim 3, the first exploration portion of the positioning jig is configured to guide the suspension bolt to enter the groove. An inclined portion that is inclined so as to spread from the groove toward the edge of the first exploration portion is formed.

  According to the present invention, it is possible to easily determine the installation position of the support member that supports the ceiling structure in the repair of the ceiling structure.

(A) is principal part sectional drawing of the example after completion | finish of the repair method of the ceiling structure which concerns on one embodiment of this invention, (b) is an expanded sectional view of the area | region A enclosed with the broken line of Fig.1 (a). It is. It is the principal part perspective view which looked at the assembly of the suspension bolt of the ceiling structure of FIG. 1, a field edge receiver, and a field edge from the downward direction. (A) is the top view which looked at the positioning jig which determines the setting position of the supporting member of the ceiling structure of FIG. 1, (b) is sectional drawing of the II line | wire of FIG. 3 (a). (A) is a top view of one exploration part of the positioning jig of FIG. 3, (b) is a top view of the other exploration part of the positioning jig of FIG. It is principal part sectional drawing in the positioning process at the time of the repair operation | work of the ceiling structure of FIG. It is a top view of an example of the surface of the ceiling board which comprises a ceiling structure. (A), (b) is principal part sectional drawing of the ceiling structure in the process of drilling a hole in the position of a suspension bolt in a ceiling board. (A), (b) is principal part sectional drawing of the ceiling structure in the installation process of the earthquake-proof reinforcement member following FIG. (A) is the top view which looked at the positioning jig used with the repair method of the ceiling structure which concerns on other embodiment of this invention from the top, (b) looked at the positioning jig of Fig.9 (a) from the bottom. FIG. (A) is the top view which looked at the positioning jig used with the repair method of the ceiling structure which concerns on other embodiment of this invention from the top, (b) is a positioning jig of Fig.10 (a) from the bottom FIG.

  Hereinafter, an embodiment as an example of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  (First embodiment)

  First, an example of a ceiling structure will be described with reference to FIGS. FIG. 1A is a cross-sectional view of an essential part of an example after the repair method for a ceiling structure according to the present embodiment, and FIG. 1B is an enlarged cross-sectional view of a region A surrounded by a broken line in FIG. 2 is a perspective view of a main part of the assembly of the suspension bolt, the field edge receiver, and the field edge of the ceiling structure of FIG. 1 as viewed from below.

  The repaired ceiling structure 1 includes, for example, a plurality of suspension bolts 3 suspended from beams or slabs of an existing building skeleton 2 made of reinforced concrete, and a plurality of fields supported by the lower ends of the suspension bolts 3. An edge receiver 4, a plurality of field edges 5 attached to the field edge receiver 4, a ceiling board (ceiling member) 6 fixed to the field edge 5, and a support member 7 that supports the ceiling board 6; And a net member 8 that holds the ceiling plate 6 when the ceiling plate 6 falls.

  The suspension bolt 3 is composed of, for example, an elongated cylindrical metal bolt. The upper end of the suspension bolt 3 is anchored to the beam or slab of the building frame 2. A hanger 9 is mounted on the lower end side of the suspension bolt 3. The hanger 9 is constituted by, for example, a substantially J-shaped metal thin plate, and a pair of nuts 10 screwed to the suspension bolt 3 in a state where the suspension bolt 3 is inserted into a hole drilled in the upper portion of the hanger 9. , 10 so that the upper part of the hanger 9 is sandwiched so as to be detachable.

  The field edge receiver 4 is formed of, for example, a U-shaped metal frame extending in one direction, and is arranged side by side at a predetermined interval along a direction intersecting the extending direction. ing. Each field receiver 4 is supported by the suspension bolt 3 in a state of being fitted into a hanger 9 attached to the lower end of the suspension bolt 3.

  The field edge 5 is composed of, for example, a U-shaped metal frame extending in one direction, and arranged side by side at a predetermined interval along a direction intersecting the extending direction. Yes. The field edge 5 is disposed so as to intersect the field edge receiver 4, and is attached to the field edge receiver 4 by a clip (not shown) or the like at the intersection with the field edge receiver 4.

  The ceiling plate 6 is a plate-like member that forms a ceiling finish surface, and is made of, for example, wood or a plaster board, and is fixed to the field edge 5 with screws or the like. In the ceiling plate 6, a through hole 6 a (see FIG. 1B) penetrating the front and back surfaces of the ceiling plate 6 is drilled immediately below the suspension bolt 3. The ceiling plate 6 is formed with an opening (not shown in FIGS. 1 and 2) for inspection, installation of a lighting fixture, and the like.

  The support member 7 is a seismic strengthening member that supports the ceiling plate 6 to prevent the ceiling plate 6 from falling due to a large-scale earthquake or the like, and is installed below the suspension bolt 3. The support member 7 includes a support portion 7a, a connecting bolt 7b, and a long nut 7c.

  The support portion 7a is made of, for example, a circular flat metal plate or the like, and is installed on the surface of the ceiling plate 6 at a position where the through hole 6a is formed (a position below the suspension bolt 3). The diameter of the support portion 7a is formed larger than the diameter of the through hole 6a. That is, the support part 7a is formed so that the outer peripheral part of the support part 7a projects outward from the outer periphery of the through hole 6a so as to cover a part of the surface of the ceiling plate 6. Thereby, the ceiling board 6 can be supported.

  The connecting bolt 7b is constituted by, for example, an elongated cylindrical metal bolt. The lower end of the connecting bolt 7b is joined or screwed to the center of the upper surface of the support portion 7a. On the other hand, the upper end of the connecting bolt 7 b protrudes to the back side of the ceiling board 6 through the through hole 6 a of the ceiling board 6 and extends to the vicinity of the suspension bolt 3.

  The long nut 7c is constituted by, for example, an elongated hollow metal nut. A connecting bolt 7b is joined or screwed to the lower side of the long nut 7c. On the other hand, the suspension bolt 3 is screwed onto the upper side of the long nut 7c. Thereby, the connection bolt 7b and the suspension bolt 3 are connected, and the support member 7 is connected to the suspension bolt 3 in a detachable state.

  The net member 8 is a seismic strengthening member that holds the ceiling panel 6 when the ceiling panel 6 is dropped due to a large-scale earthquake or the like, and is installed so as to cover a part or all of the surface (ceiling surface) of the ceiling panel 6. Has been. The net member 8 is supported by the support member 7 in a state of being sandwiched between the support portion 7 a of the support member 7 and the surface of the ceiling plate 6.

  The net member 8 is fixed to the net receiving wire 8a by a net receiving wire 8a (see FIG. 1 (b)) arranged in a lattice shape so as to cover the surface of the ceiling board 6, and placed on the net receiving wire 8a. And a protected net (not shown). In addition, the edge part of the net receiving wire 8a is being fixed to the indoor side wall surface of the building frame 2 via the turnbuckle (not shown). The tension of the net receiving wire 8a can be adjusted by the turnbuckle. The net member 8 may not have the net receiving wire 8a. In this case, the protective net is supported in a state of being sandwiched between the support portion 7a and the surface of the ceiling board 6.

  Next, an example of a positioning jig that determines the position of the support member 7 in the above-described repairing process of the ceiling structure 1 will be described with reference to FIGS. 3 and 4. 3A is a plan view of the positioning jig for determining the setting position of the support member of the ceiling structure shown in FIG. 1, and FIG. 3B is a cross-sectional view taken along the line II in FIG. 4A is a plan view of one exploration portion of the positioning jig of FIG. 3, and FIG. 4B is a plan view of the other exploration portion of the positioning jig of FIG.

  The positioning jig 15 is constituted by, for example, a frame having a U-shaped cross section, and includes a pair of exploration parts E1 and E2, a support part Sp, a gripping part Hd, and spirit levels Lv1 and Lv2. . The positioning jig 15 is made of, for example, wood or plastic, except for the level levels Lv1 and Lv2. Thereby, since the positioning jig 15 can be lightened, the operability of the positioning jig 15 can be improved.

  One exploration part (first exploration part) E1 is formed of a substantially rectangular thin plate, for example. Grooves T extending from the outer periphery toward the center side of the exploration part E1 are formed on the outer periphery (both long sides in the width direction and the front end side in the longitudinal direction) of the exploration part E1, and on both sides of the groove T An inclined portion S that is inclined so as to gradually expand from the groove T toward the outer periphery of the exploration portion E1 is formed. When positioning the support member 7, the position of the suspension bolt 3 is specified by fitting the suspension bolt 3 into the groove T of the exploration part E1. Further, the suspension bolt 3 is guided by the inclined portion S so as to enter the groove T during the positioning operation. Thereby, since the exploration of the suspension bolt 3 can be facilitated during the positioning operation of the support member 7, the positioning workability of the support member 7 can be improved.

  The other exploration part (second exploration part) E2 is formed of, for example, an elongated, substantially rectangular thin plate, and is disposed so as to face the exploration part E1. A plurality of holes H penetrating the upper and lower surfaces of the exploration part E2 are drilled. This hole H is drilled at a position facing the groove T of the exploration part E1, and when the setting position of the support member 7 (the through hole 6a of the ceiling board 6) is determined by the positioning jig 15, the hole H of the ceiling board 6 is determined. It is a positioning part for specifying the position of the suspension bolt 3 from the surface side.

  The support portion Sp is, for example, a portion that is provided between the pair of search portions E1 and E2 and supports the pair of search portions E1 and E2 so as to be parallel to each other. The gripping part Hd is a part where the worker has the positioning jig 15 when positioning the support member 7 and is attached to the outer surface of the support part Sp.

  The level levels Lv1 and Lv2 are devices that allow the leveling of the positioning jig 15 to be visually observed. One level Lv1 is installed so that the levelness in the width direction of the positioning jig 15 can be seen, and the other level Lv2 is installed so that the levelness in the longitudinal direction of the positioning jig 15 can be seen. By providing these levels Lv1 and Lv2, the horizontal accuracy of the positioning jig 15 can be improved during the positioning operation of the support member 7, so that the positioning accuracy of the suspension bolt 3 can be improved. 7 setting position accuracy can be improved.

  Next, an example of the repair method of the ceiling board 6 of this Embodiment is demonstrated with reference to FIGS.

  FIG. 5 is a cross-sectional view of the main part during the positioning step during the repair work of the ceiling structure of FIG. Prior to the description of the method for repairing a ceiling structure according to the present embodiment, an example of an assembly process for an existing ceiling structure will be described as follows.

  First, after attaching the hanger 9 to the lower end side of each of the plurality of suspension bolts 3 fixed to the ceiling surface of the building frame 2 by anchor connection, the plurality of field receivers 4 are attached by the hanger 9. Subsequently, a plurality of field edges 5 are arranged so as to intersect with the plurality of field edge receivers 4, and the field edge 5 is attached to the field edge receiver 4 by a clip or the like at the intersection with the field edge receiver 4 Thereafter, the ceiling plate 6 is fastened to the plurality of field edges 5 with screws or the like.

  Next, an example of the repair method of the present embodiment will be described as follows. First, the position of the suspension bolt 3 on the back surface side of the ceiling plate 6 from the front surface (ceiling surface) side of the ceiling plate 6 is specified. That is, after the exploration part E1 of the positioning jig 15 is inserted through the opening 6b opened in the ceiling plate 6 for inspection or lighting equipment, the ceiling plate 6 is sandwiched between the pair of exploration parts E1 and E2. Then, the exploration part E1 on the back surface side of the ceiling board 6 is moved to fit the suspension bolt 3 into the groove T of the exploration part E1, and the upper surface of the exploration part E2 of the positioning jig 15 is brought into close contact with the surface of the ceiling board 6. At this time, the position of the hole H of the exploration part E2 facing the groove T of the exploration part E1 in which the suspension bolt 3 is fitted becomes the position of the suspension bolt 3 (that is, the installation position of the support member 7). The surface of the ceiling board 6 is marked with a pencil or the like through the hole H as shown in FIG. Thereby, the position of the suspension bolt 3 on the back surface side of the ceiling plate 6 can be easily specified from the front surface side of the ceiling plate 6, and the installation position of the support member 7 that supports the ceiling structure 1 can be easily determined. it can. At this time, the leveling accuracy of the suspension bolt 3 can be improved by confirming the leveling of the positioning jig 15 with the level levels Lv1 and Lv2 and maintaining the leveling of the positioning jig 15. In addition, when the opening part opened to the ceiling board 6 for an inspection, a lighting fixture, etc. is far from the implementation position, you may provide the opening part 6b by removing the ceiling board 6. FIG.

  Subsequently, FIG. 6 is a plan view of an example of the surface of the ceiling plate 6 constituting the ceiling structure 1. Hanging bolts 3 are installed at the intersections of the grid-like virtual lines. Reference sign D indicates an adjacent interval between the suspension bolts 3 and is not particularly limited, but is, for example, about 900 mm. Here, also in the vicinity of the other opening 6b, the position P1 of the suspension bolt 3 is specified using the positioning jig 15 in the same manner as described above, and the position P1 is marked. Subsequently, since the adjacent interval D of the suspension bolt 3 is determined, the position P2 of the remaining suspension bolt 3 is determined using a tape measure, a laser meter, or the like based on the position P1 of the suspension bolt 3 specified by the positioning jig 15. Identify. In this way, the positions of all the suspension bolts 3 are not specified by the positioning jig 15, but the positions of some of the suspension bolts 3 are specified by the positioning jig 15 and the positions of the remaining suspension bolts 3 are determined. By specifying from the adjacent interval D, the efficiency of the position specifying operation of the suspension bolt 3 can be improved.

  7 (a) and 7 (b) are cross-sectional views of the main part of the ceiling structure in the process of drilling holes at the positions of the suspension bolts in the ceiling plate, and FIGS. 8 (a) and 8 (b) are FIG. It is principal part sectional drawing of the ceiling structure in the installation process of the subsequent earthquake-resistant reinforcement member. Here, as shown in FIG. 7A, the ceiling board 6 is moved from the surface side of the ceiling board 6 to the positions P1 and P2 of the suspension bolt 3 specified in the ceiling board 6 as shown in FIG. A through hole 6a penetrating the upper and lower surfaces is drilled. Subsequently, as shown in FIG. 8A, the net member 8 is installed on the surface side of the ceiling board 6 so as to cover a part or the whole thereof. Thereafter, as shown in FIG. 8 (b), the connecting bolt 7b of the support member 7 protrudes to the back side of the ceiling plate 6 through the through hole 6a of the ceiling plate 6, and the long nut 7c at the tip of the connecting bolt 7b and the suspension bolt 3, the long nut 7 c and the suspension bolt 3 are screwed together by rotating the support portion 7 a in the closing direction. Thus, the support member 7 and the suspension bolt 3 are connected to support the ceiling plate 6, and the net member 8 is supported so that the net member 8 is sandwiched between the surface of the ceiling plate 6 and the support portion 7 a. . In this way, the seismic repair of the ceiling structure 1 is completed.

  (Second Embodiment)

  FIG. 9A is a plan view of the positioning jig used in the method for repairing a ceiling structure according to the present embodiment as viewed from above, and FIG. 9B is a diagram of the positioning jig of FIG. 9A as viewed from below. It is a top view.

  In the present embodiment, the pair of exploration portions E3 and E4 of the positioning jig 15 that determines the installation position of the support member 7 is formed of, for example, a rod-shaped thin plate. Grooves T <b> 1 and T <b> 2 for exploring the suspension bolt 3 are formed on the front end side in the longitudinal direction and the one long side in the width direction of the exploration portions E <b> 3 and E <b> 4 of the positioning jig 15. And the groove | channel T1 of the search part E3 and the groove | channel T2 of the search part E4 are provided in the position which mutually opposes.

  In this embodiment, since the width of the pair of exploration portions E3 and E4 of the positioning jig 15 is narrower than that of the first embodiment, the weight of the positioning jig 15 is set to the first weight. It can be made lighter than in the case of the embodiment. Moreover, since the width of the pair of exploration parts E3 and E4 of the positioning jig 15 is small, the exploration part E3 or the exploration part E4 can be easily placed from the opening 6b of the ceiling board 6 to the back surface side of the ceiling board 6. Therefore, the operability of the positioning jig 15 can be improved.

  Here, in the specific work of the position of the suspension bolt 3 by the positioning jig 15, the positioning jig is only from one (right or left) side of the suspension bolt 3 because of the position of the hanger 9 attached to the suspension bolt 3. 15 may not be close to the suspension bolt 3. In the present embodiment, when the positioning jig 15 can be approached only from one (right) side of the suspension bolt 3, the exploration part (first exploration part) E <b> 3 of the positioning jig 15 is the opening of the ceiling plate 6. The suspension bolt 3 is inserted into the groove T1 of the exploration part E3 from the rear surface side of the ceiling board 6 from 6b, and the suspension bolt 3 is fitted in the exploration part (second exploration part) E4 on the surface side of the ceiling board 6 The position of the groove (positioning part) T2 facing the groove T1 is specified as the position of the suspension bolt 3.

  On the other hand, when the positioning jig 15 can be approached only from the other (left) side of the suspension bolt 3, the exploration part (first exploration part) E4 of the positioning jig 15 is connected to the ceiling board 6 from the opening 6b of the ceiling board 6. Is inserted into the groove T2 of the exploration part E4 and faces the groove T2 in which the suspension bolt 3 is fitted in the exploration part (second exploration part) E3 on the surface side of the ceiling plate 6. The position of the groove (positioning part) T1 is specified as the position of the suspension bolt 3.

  As described above, also in the present embodiment, even when there are two search directions for the suspension bolt 3, one positioning jig 15 can cope with the two search directions.

  (Third embodiment)

  FIG. 10A is a plan view of the positioning jig used in the method for repairing a ceiling structure according to the present embodiment as viewed from above, and FIG. 10B is a diagram of the positioning jig of FIG. 10A as viewed from below. It is a top view.

  Also in the present embodiment, the exploration portions E5 and E6 of the positioning jig 15 for determining the installation position of the support member 7 are formed of, for example, a rod-shaped thin plate. As a result, similar to the second embodiment, the positioning jig 15 can be reduced in weight, and can be easily inserted from the opening 6b of the ceiling plate 6. Therefore, the operability of the positioning jig 15 is improved. Can be made.

  Grooves T1 and T2 for exploring the suspension bolt 3 are formed on the distal end side in the longitudinal direction and on both long side sides in the width direction of the pair of exploration portions E5 and E6 of the positioning jig 15. Grooves T1 are alternately formed on both long sides of the exploration part E5 along the longitudinal direction of the exploration part E5 so as to be positioned on opposite long sides. On the other hand, on both long sides of the exploration part E6, grooves T2 are alternately formed along the longitudinal direction of the exploration part E6 so as to be located on opposite long sides. Also in this case, the groove T1 of the exploration part E5 and the groove T2 of the exploration part E6 are provided at positions facing each other. Thereby, even when there are two exploration directions of the suspension bolt 3, it is possible to cope with either the exploration part E5 or the exploration part E6 without taking in or out the exploration part E5 or the exploration part E6. Therefore, the operability of the positioning jig 15 can be improved as compared with the case of the second embodiment.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the embodiment disclosed in this specification is an example in all respects and is limited to the disclosed technology. It is not a thing. That is, the technical scope of the present invention should not be construed restrictively based on the description in the above-described embodiment, but should be construed according to the description of the scope of claims. All modifications are included without departing from the technical scope equivalent to the described technique and the gist of the claims.

  For example, in the above-described embodiment, the case where the inclined portions for guiding the suspension bolt are formed on both sides of the groove of the exploration portion into which the suspension bolt is fitted has been described. A configuration may be adopted in which only the groove is formed in the exploration part without forming the inclined part for guiding the suspension bolt.

  Moreover, you may provide the through-hole for the weight reduction of a positioning jig in the area | region without a positioning groove | channel and a hole in each of a pair of search part of a positioning jig.

  As described above, the method for repairing a ceiling structure and the positioning jig used therefor according to the present invention are useful when applied to a technique for determining a set position of a support member of a ceiling structure.

DESCRIPTION OF SYMBOLS 1 Ceiling structure 2 Building frame 3 Suspension bolt 4 Field edge receiver 5 Field edge 6 Ceiling board 6a Hole 6b Opening part 7 Support member 8 Net member 9 Hanger 10 Nut 15 Positioning jig E1-E6 Search part Sp Support part Hd Grasping part Lv1, Lv2 Level T, T1, T2 Groove H Hole

Claims (4)

Identifying the position of the suspension bolt provided to support the ceiling member on the building housing on the back side of the ceiling member using a positioning jig from the surface side of the ceiling member;
Drilling a through hole at the position of the suspension bolt on the surface of the ceiling member;
Connecting a support member having a portion projecting outside the outer periphery of the through hole so as to cover a part of the surface of the ceiling member to the suspension bolt through the through hole;
Have
The positioning jig is
A first exploration portion having a groove into which the suspension bolt can be fitted;
A second exploration portion that is provided to face the first exploration portion and has a groove-shaped or hole-shaped positioning portion at a position facing the groove of the first exploration portion;
With
The step of identifying the position of the suspension bolt by the positioning jig is as follows:
While disposing the first exploration part on the back side of the ceiling member, arranging the second exploration part on the surface side of the ceiling member;
Depending on the position of the positioning portion of the second exploration portion when the suspension bolt is fitted in the groove of the first exploration portion, the position of the suspension bolt on the back side of the ceiling member is determined by the surface of the ceiling member. Identifying from the side,
A method for repairing a ceiling structure characterized by comprising:   The first exploration portion of the positioning jig has an inclined portion that inclines so as to spread from the groove toward the edge of the first exploration portion so as to guide the suspension bolt to enter the groove. The method for repairing a ceiling structure according to claim 1, wherein the method is repaired. A first exploration portion having a groove into which a suspension bolt provided to support the ceiling member can be fitted in a building frame on the back side of the ceiling member;
A second exploration portion that is provided to face the first exploration portion and has a groove-shaped or hole-shaped positioning portion at a position facing the groove of the first exploration portion;
With
While the first exploration part is disposed on the back side of the ceiling member and the second exploration part is disposed on the surface side of the ceiling member, the suspension bolt is inserted into the groove of the first exploration part. The ceiling structure is characterized in that the position of the suspension bolt on the back surface side of the ceiling member can be specified from the front surface side of the ceiling member by the position of the positioning portion of the second exploration portion when fitted. Positioning jig used for body repair methods.   The first exploration portion of the positioning jig has an inclined portion that inclines so as to spread from the groove toward the edge of the first exploration portion so as to guide the suspension bolt to enter the groove. The positioning jig used for the repair method of the ceiling structure of Claim 3 currently formed.

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