JP2018066118A - Temporary support device for attic scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary support device for an attic scaffold capable of quickly and stably supporting the attic scaffold by a ceiling hanging bolt of an existing building not having a preliminary or an additive nut for supporting the attic scaffold.SOLUTION: A temporary support device (4) comprises: a locking tool (6) including right and left locking portions (61, 62) pivotably and openably/closably connected by a pivotal portion (63); and a retainer (5) attached to at least one of the locking portions and retaining a horizontal member (3) for scaffold plate supporting. Female screw halves (70, 80) fittable to a male screw of a ceiling hanging bolt (25) are integrally formed in the pivotal directional inside of each of the locking portions, and the female screw halves of the right and left locking portions, in a state of closing the locking portions with the pivotal portion, cooperatively form a female screw screwed to the hanging bolt substantially over the whole hanging bolt.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a temporary support device for a ceiling scaffold, and more specifically, a ceiling for supporting a scaffold such as a construction scaffold by a ceiling suspension bolt in a ceiling back space of a building such as an existing building. The present invention relates to a temporary support device for a scaffold.

  In recent years, there has been a lot of attention in the building industry, such as accidents involving falling ceiling structures that can occur during large-scale earthquakes, and as a measure to prevent falling or dropping of ceiling structures such as existing structures, the ceiling structures are reinforced with earthquake resistance. The need for seismic reinforcement work is recognized in many buildings. Generally, the ceiling structure is supported by a light steel frame or wooden field edge, etc. under the ceiling suspension bolts hanging from the upper floor slab, upper floor structure, beam, roof structure, etc. of the building. It has a structure in which a board building material such as a plaster board is fixed to the lower surface of the board.

  In the seismic reinforcement work for seismically reinforcing the ceiling structure, for example, adjacent ceiling suspension bolts are bridged by a reinforcing steel brace (diagonal material) to improve the overall earthquake resistance of the ceiling structure. In such construction, since it is necessary for an operator or the like to perform work in the ceiling space, usually a temporary work scaffold (ceiling scaffold) must be temporarily installed in the ceiling space.

  As this kind of ceiling scaffolding, for example, a scaffolding support bracket is locked to a steel nut screwed to a ceiling suspension bolt, the scaffolding support member is supported by the scaffolding support bracket, and the scaffolding plate is supported by the scaffolding support member. Japanese Patent No. 5374070 and Japanese Patent No. 5319426 (Patent Documents 1 and 2) describe a ceiling underfloor scaffold having a supporting structure.

  Further, although not related to the scaffold support structure, Japanese Patent No. 4781090 related to Japanese Patent Application No. 2005-335257 filed by one of the present applicants as a kind of temporary support system using a ceiling suspension bolt includes safety A hook holding device for locking a belt to a ceiling suspension bolt or the like is described. The hook holding device is for mooring a hook of a safety band such as an operator to a ceiling suspension bolt. The hook holding device has a pair of opening and closing plates, and each opening and closing plate is formed with a locking portion obtained by dividing a female screw. A ring portion capable of hooking a safety belt hook is attached to the opening / closing plate. In this hook holding device, when the left and right opening / closing plates are closed and the locking portions are locked to the ceiling hanging bolts, the locking portions of the opening / closing plates can be moored to the ceiling hanging bolts. An operator or the like can moor the safety belt to the ceiling suspension bolt by hooking the hook of the safety belt to the ring portion.

Japanese Patent No. 5374070 Japanese Patent No. 5319426 Japanese Patent No. 4781090

  In the support structure for a ceiling scaffold described in Patent Documents 1 and 2, a preliminary or additional steel nut for locking the scaffold support bracket is screwed to a ceiling suspension bolt in advance when a ceiling structure is newly installed. I have to keep it. However, existing building ceiling structures typically do not include such preliminary or additional steel nuts. For this reason, when a ceiling back scaffold is temporarily installed in the ceiling structure of the existing building which is not equipped with this kind of steel nut, the support structure described in patent documents 1 and 2 cannot be used.

  On the other hand, the hook holding device described in Patent Document 3 does not require a preliminary or additional steel nut. However, the hook holding device has a simple structure that supports the weight of the worker who only acts on the safety belt, and cannot support a relatively large weight like a ceiling scaffold. Moreover, since the hook holding device has a structure that freely rotates or freely rotates on the male screw of the ceiling suspension bolt, it is difficult to use as means for fixing the ceiling back scaffold in a predetermined position.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a ceiling hanging bolt for an existing building that does not include a preliminary or additional nut for supporting a ceiling scaffolding. Thus, it is an object of the present invention to provide a temporary support device for a ceiling back scaffold that can support the ceiling back scaffold quickly and stably.

In order to achieve the above object, the present invention provides a temporary support device for a ceiling underfloor scaffold for supporting the ceiling underfloor scaffold by a ceiling suspension bolt that constitutes the ceiling structure.
An openable and closable mooring tool comprising left and right mooring parts interconnected pivotally by pivot means;
A retainer that is attached to at least one of the mooring portions and releasably holds a scaffold for supporting a scaffold plate;
On the inner side in the pivotal direction of each of the mooring portions, a female screw half that fits into the male screw of the ceiling suspension bolt is integrally formed,
The female screw halves of the left and right anchoring portions cooperate with the female screw that is screwed to the suspension bolt substantially over the entire circumference of the suspension bolt in a state where the anchoring portion is closed by the pivot means. Formed,
The holder is restricted or prevented from rotating around the ceiling suspension bolt by integrating the horizontal member and the holder, and supported by the ceiling suspension bolt by screwing the female screw half and the ceiling suspension bolt. There is provided a temporary support device for a ceiling scaffold characterized by being provided.

  According to the above configuration of the present invention, by closing the left and right mooring portions, a female screw that is screwed to the suspension bolt substantially over the entire circumference of the suspension bolt is formed. The load on the ceiling suspended scaffold and the horizontal member (hereinafter referred to as “scaffold load”) is transmitted to the female screw half of the mooring tool via the holder. Since the female screw half constitutes a female screw that is screwed onto the suspension bolt substantially over the entire circumference of the suspension bolt, the anchoring device, like the nut, reliably transmits the scaffold load to the ceiling suspension bolt, Therefore, the ceiling suspension bolt can reliably support the scaffold load. In addition, since the free rotation or idle rotation of the holder is restricted or prevented by the integration of the horizontal member and the holder, there is no possibility that the female screw rotates with respect to the male screw. Is stable.

  The temporary support device having such a configuration does not require a preliminary or additional nut screwed to the ceiling suspension bolt. Moreover, since the mooring tool with the left and right mooring tools opened is positioned at the desired position of the ceiling suspension bolt and the mooring device is closed, the mooring device can be screwed onto the ceiling suspension bolt, so it is extremely quick and easy. A mooring tool can be attached to the ceiling suspension bolt.

  According to the experiments by the present inventors, it has been found that a sufficient support force for supporting the ceiling scaffolding can be obtained by the temporary support device having such a configuration.

From another viewpoint, the present invention is a method for constructing a ceiling scaffold using the temporary support device having the above-described configuration,
After the mooring portion is opened and the mooring tool is positioned so that the female screw half faces the suspension bolt, the mooring portion is closed and the female screw half is screwed to the outer screw of the suspension bolt,
Holding the horizontal member by the holder;
The scaffold plate is suspended in the ceiling space by the horizontal member supported at both ends, or two places or two parts spaced apart by the holder, and a scaffold is formed in the ceiling space. A method for constructing a ceiling scaffolding is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the ceiling back which can support a ceiling back scaffold quickly and stably by the ceiling suspension bolt of the existing building which does not have the preliminary | backup or additional nut for supporting a ceiling back scaffold. A temporary support device for a scaffold can be provided.

FIG. 1 is a perspective view showing an overall configuration of a ceiling structure provided in an existing steel structure building. FIG. 2 is a longitudinal sectional view of the ceiling structure cut in a direction parallel to the beam. FIG. 3 is a longitudinal sectional view of the ceiling structure cut in a direction orthogonal to the beam. FIG. 4A to FIG. 4D are a front view, a rear view, a plan view, and a bottom view showing the structure of the temporary support device. In FIGS. 4A and 4B, the illustration of the clamp (holding tool) is omitted. 5 (A) to 5 (D) are cross-sectional views taken along lines II, II-II, III-III, and IV-IV in FIGS. 4 and 5, respectively. FIG. 5F is a right side view and a left side view of the temporary support device 4. In each figure of FIG. 5, illustration of a clamp (holding tool) is omitted. 6A to 6C are cross-sectional views showing a process of engaging the temporary support device with the ceiling suspension bolt. FIGS. 7A to 7C are a longitudinal sectional view and a plan view showing a state where the temporary support device is engaged with the ceiling suspension bolt. FIG. 8 is a schematic cross-sectional view of the temporary support device showing the difference in the scaffold load transmission path related to the structure of the temporary support device.

  According to a preferred embodiment of the present invention, the holder is attached to both the left and right mooring portions. Preferably, the holder is a single tube scaffolding clamp (clamp), and the horizontal member is a single tube for a single tube scaffold.

  Preferably, the mooring portion is made of a box-shaped or housing-shaped metal member in which an upper edge and a lower edge of a metal plate extending in the vertical direction are bent or bent inwardly (closed side) in the pivot direction. The means includes a pivot shaft or a pivot center shaft that supports or supports the mooring portion so as to be pivotable or pivotable, or a hinge member or a hinge that hinges the left and right metal members. More preferably, the upper edge and the lower edge (bent part or bent part) of the metal member to which the holder is attached are the upper and lower edges (bent part or bent part) of the metal member to which the holder is not attached. The load of the holder is evenly distributed to the left and right metal members via these edges.

  Preferably, the urging means for urging or pressing the metal member inward (closed side) or outside (open side) in the pivot direction, and the left and right mooring portions are mutually connected so as to maintain the closed position of the mooring device. Closed position holding means for restraining. The urging means urges the mooring part so as to restrict or limit the opening (or closing) movement of the mooring part.

  FIG. 1 is a perspective view showing an overall configuration of a ceiling structure provided in an existing steel structure building. FIG. 2 is a longitudinal sectional view of the ceiling structure cut in a direction parallel to the beam, and FIG. 3 is a longitudinal sectional view of the ceiling structure cut in a direction orthogonal to the beam.

  The ceiling structure 20 has a structure in which two layers of face materials 31 and 32 are fixed to the lower surfaces of the steel bases 21 to 27. The steel base has a light steel field edge 21, a clip 22, a field edge receiver 23, and a hanger 24. The hanger 24 is suspended from a steel horizontal member 27 by a steel suspension bolt 25 and a steel hook 26. The steel suspension bolt 25 is a so-called full screw bolt in which a male screw is formed over the entire length.

  The field edges 21 are arranged with an interval of about 450 mm to about 600 mm. If desired, a metal member (not shown) such as a steady rest is placed in place on the steel substrate. The steel horizontal member 27 is made of a shape steel such as a channel shape steel or a channel shape steel, and is a steel support 28 such as a steel bar or a steel bar material fixed to the lower surface of a beam 29 having a steel structure (FIGS. 2 and 2). It is fixed to the lower side of the beam 29 via 3). The beam 29 is supported by a steel structure column 30 (FIGS. 2 and 3).

  As the two-layer face material, the lower face material 31 and the upper face material 32 are fixed to the lower surface of the field edge 21 by fixing tools or fixing means such as screws, staples, and adhesives. As the face materials 27 and 28, a plaster board or a calcium silicate board having a plate thickness of about 9.5 to 15 mm can be suitably used. A ceiling back space S is formed on the upper surface 31 and an indoor space R is formed on the lower surface 32.

  Ceiling scaffold 1 is temporarily installed in ceiling space S. The ceiling back scaffolding 1 constitutes a working scaffold for an operator or the like to work in the ceiling back space S or move in the ceiling back space S in a seismic reinforcement work or the like for seismically reinforcing the ceiling structure. The ceiling scaffold 1 includes a steel or wooden scaffolding plate 2, a horizontal member 3 on which the scaffolding plate 2 can be laid, and a temporary support device 4 for supporting the horizontal member 3 with ceiling suspension bolts 25. Is done. The temporary support device 4 includes a holder 5 that supports the horizontal member 3 and a mooring tool 6 that is locked to the ceiling suspension bolt 25.

  The scaffolding plate 2 is made of, for example, a wooden scaffolding plate or a steel tread for a framed scaffolding, and the horizontal member 3 is made of, for example, a single pipe used in a single pipe scaffold. The holder 5 is a fastening tool for temporary work (generally called a clamp or a clamp member) used in a single pipe scaffold. The horizontal member 3 is integrally supported by the holder 5 by the tightening force of the holder 5, and is released from the holder 5 by releasing the tightening force of the holder 5.

  FIGS. 4A to 4D are a front view, a rear view, a plan view, and a bottom view showing the configuration of the temporary support device 4. 5 (A) to 5 (D) are cross-sectional views taken along lines II, II-II, III-III, and IV-IV in FIGS. 4 and 5, respectively. FIG. 5F is a right side view and a left side view of the temporary support device 4. 6 (A) to 6 (C) are cross-sectional views illustrating a process of opening the temporary support device 4 and engaging with the ceiling suspension bolt 25. FIG. FIGS. 7A to 7C are a longitudinal sectional view and a plan view showing a state in which the fixture 5 is engaged with the ceiling suspension bolt 25. In addition, in FIG. 4 (A), FIG. 4 (B), FIG. 5 (all drawings), FIG. 6 (B), FIG. 6 (C), FIG. 7 (A), and FIG. The illustration is omitted to simplify the drawing.

  As shown in FIGS. 4 and 5, the mooring tool 6 has a pair of left and right mooring parts 61, 62, and the mooring parts 61, 62 are connected to each other by a pivotal part 63 so as to be pivotable and openable / closable. FIG. 6A shows a state in which the anchoring portions 61 and 62 are pivoted about the pivot axis of the pivoting portion 63 to open the anchoring portions 61 and 62.

  Each of the mooring portions 61 and 62 is made of a box-shaped or housing-shaped metal member in which an upper edge and a lower edge of a metal plate extending in the vertical direction are bent or bent inward in the pivot direction (closed side). The mooring portions 61 and 62 include vertical walls 61a and 62a, upper end bent portions 61b and 62b, and lower end bent portions 61c and 62c. The vertical walls 61 a and 62 a extend in parallel to form the outer vertical surface of the mooring portions 61 and 62. The lower end bent portions 61c and 62c are in contact with or close to each other in a state of overlapping each other, and the upper end bent portions 61b and 62b are also in contact with or in close proximity to each other in an overlapping manner.

  The pivot part 63 includes a central axis 63a extending in the vertical direction and a torsion spring (torsion coil spring) 63b that urges or presses the vertical walls 61a and 62a inward in the pivot direction. The mooring portions 61 and 62 are urged inward in the pivoting direction (closing direction) by the elastic force of the torsion spring 63b. The central shaft 63a passes through the upper end bent portions 61b and 62b, the torsion spring 63b and the lower end bent portions 61c and 62c, and the upper end bent portions 61b and 62b and the lower end bent portions 61c are formed by the enlarged portions 63c and 63d at the upper end and the lower end. 62c is restrained, and thereby, the pivots (rotating shafts) of the mooring portions 61 and 62 are configured.

  4 and 5 show the closed positions of the mooring portions 61 and 62. FIG. The mooring portions 61 and 62 are restrained in the closed position by a restraining tool (stopper) 66. The restraint tool 66 includes a support shaft 66a fixed to the mooring portion 62 and a swinging portion 66b that can swing around the support shaft 66a. The swinging portion 66b includes a gripping portion 66c that partially surrounds the upper surface and the side surface of the end of the anchoring device 6 located on the side opposite to the pivoting portion 63 and grips it with a finger during an opening / closing operation. 4 and 5, the swinging portion 66 b abuts on the upper surface and the side surface of the end portion of the anchoring device 6, and the anchoring portions 61 and 62 with the pivotal portion 63 as the center. Prevent pivoting.

  Female screw members 70 and 80 having female screw halves 71 and 81 are disposed on the inner surfaces of the vertical walls 61a and 62a. The female screw members 70 and 80 are fixed to the vertical walls 61a and 62a by fixing means 71 and 81 such as screws or screws. The female screw halves 71 and 81 are half of the female screw (inner screw) that matches the male screw (outer screw) of the suspension bolt 25. 4 and 5, the female screw halves 71 and 81 face each other to form a substantially single female screw that fits the male screw of the suspension bolt 25. A central axis XX of a single female screw obtained by synthesizing female screw halves 71 and 81 is shown in FIGS. 5 (A) to 5 (C). It should be noted that expressions such as “substantially a single female screw...” Or “substantially the entire circumference of the suspension bolt 25” indicate a slight gap or gap between the female screw halves 70 and 80. Even if a continuous portion or the like occurs, it means that a screw groove that is continuous over the entire circumference is formed.

  The anchoring device 6 comprises circular openings 6a, 6b aligned on the central axis XX at the top and bottom. As shown in FIG. 7, the circular openings 6a and 6b are openings through which the suspension bolt 25 penetrates the anchoring tool 6 in the vertical direction. The circular openings 6a and 6b are formed at the top and bottom of the anchoring tool 6 by forming notches or recesses at the edges of the upper end bent portions 61b and 62b and the lower end bent portions 61c and 62c.

  As described above, the holder 5 that constitutes the temporary support device 4 together with the anchoring device 6 includes a single tube scaffolding clamp (clamp) attached to the vertical wall 61a. The holder 5 has a support shaft 51 that penetrates the vertical wall 61 a horizontally, and the support shaft 51 supports the main body of the holder 5 so as to be rotatable about the central axis of the support shaft 51. A nut 64 (shown by a broken line) that can be screwed to the tip end portion of the support shaft 51 provided with an external screw (male screw) is disposed in the anchoring tool 6. The nut 64 is screwed into the external screw portion of the support shaft 51 within the anchoring tool 6, and the support shaft 51 is fixed to the vertical wall 61 a by the tightening force of the nut 64. If desired, the holder 5 may be attached to the vertical wall 62a, or may be attached to both the vertical walls 61a and 62a.

  Next, a method for using the temporary support device 4 will be described.

  The gripping part 66c of the restraint tool 66 is gripped with fingers, and the swinging part 66b swings upward as shown by the arrow α in FIGS. 4A and 5A, and the anchoring tool 6 by the swinging part 66b is used. When the restraint is released or released, the mooring portions 61 and 62 can be released as shown in FIG. When the anchoring portions 61 and 62 are pivoted around the central axis 63a of the pivoting portion 63, the elastic force of the torsion spring 63b is increased, so that excessive rotation of the anchoring portions 61 and 62 is restricted.

  The mooring portions 61 and 62 are opened as shown in FIG. 6 (A), are brought close to the suspension bolt 25 (shown by broken lines in FIG. 6 (A)), and as shown in FIG. After the anchoring device 6 is positioned so that 80 faces the suspension bolt 25 and then the anchoring portions 61 and 62 are closed, the female screw halves 70 and 80 are connected to the male screw of the suspension bolt 25 as shown in FIG. And a single female screw constituted by the female screw halves 70 and 80 is screwed to the suspension bolt 25. In this state, when the gripping portion 66c of the restraint tool 66 is gripped with fingers and the swinging portion 66b swings downward, and the anchoring portions 61 and 62 are restrained by the swinging portion 66b, the anchoring device 6 is screwed onto the suspension bolt 25. It is possible to maintain the worn state. However, this state is a state in which the anchoring tool 6 can freely rotate on the suspension bolt 25.

  A state in which the plurality of anchoring devices 6 are anchored to the suspension bolt 25 in this manner is shown in FIGS. In use of the temporary support device 4, each end of the horizontal member 3 for supporting the scaffold plate 2 is fastened (clamped) to the holding tool 5 supported by the anchoring tool 6, and in the form of a support beam at both ends. Suspended in the ceiling space S. Both ends of the horizontal member 3 are tightened by the holders 5 arranged at intervals in a direction perpendicular to the laying direction of the scaffold plate 2, and the end portions of the respective scaffold plates 2 are laid on the respective horizontal members 3. The

  The loading load and the own weight of the scaffolding plate 2 are transmitted to each holding tool 5 through the horizontal member 3, transmitted to the suspension bolt 25 through the anchoring tool 6, and supported by the suspension bolt 25. As described above, the anchoring tool 6 is in a state of being screwed to the male screw of the suspension bolt 25, so that it can freely rotate about the axis of the suspension bolt 25, but the retainer 5 fastened to the horizontal member 3 is provided. Since the rotation of the mooring tool 6 is restricted, the rotation and the vertical displacement of the mooring tool 6 are restricted or restricted, and the position of the mooring tool 6 is stabilized.

  Thus, although the scaffold plate 2 is disposed in the ceiling space S, according to the loading test by the present inventors, the temporary support device 4 having such a configuration exhibits sufficient strength as a scaffold support means. Was confirmed.

  As described above, the temporary support device 4 is attached to the mooring tool 6 including the left and right mooring parts 61 and 62 connected to the pivoting part 63 so as to be pivotable and openable and to the at least one mooring part 61 and 62. And a holding tool 5 for releasably holding the horizontal member 3 for supporting the scaffolding plate. Female screw halves 70 and 80 that fit the male screws of the ceiling suspension bolt 25 are integrally formed on the inner sides of the anchoring portions 61 and 62 in the pivotal direction. The female screw halves 70 and 80 of the left and right anchoring portions 61 and 62 are screwed onto the suspension bolt 25 substantially over the entire circumference of the suspension bolt 25 in a state where the anchoring portions 61 and 62 are closed by the pivot portion 63. The female screw to be worn is formed in cooperation. The holder 5 is restrained or prevented from rotating around the ceiling suspension bolt 25 by the integration of the horizontal member 3 and the retainer 5, and the ceiling of the holder 5 by screwing the female screw halves 70 and 80 and the ceiling suspension bolt 25. Supported by the suspension bolt 25.

  According to such a configuration, by closing the left and right mooring portions 61 and 62, a female screw that is screwed to the suspension bolt 25 over substantially the entire circumference of the suspension bolt 25 is formed. The loads (scaffold loads) of the scaffold plate 2 and the horizontal member 3 are transmitted to the female screw halves 70 and 80 of the anchoring device 6 through the holder 5. Since the female screw halves 70 and 80 constitute a female screw that is screwed to the suspension bolt 25 over substantially the entire circumference of the suspension bolt 25, the anchoring device 6 applies the scaffold load to the suspension bolt 25 in the same manner as the nut. Therefore, the suspension bolt 25 can reliably support the scaffold load. Further, since the rotation of the anchoring tool 6 is restrained or prevented by the integration of the horizontal member 3 and the holding tool 5, there is no possibility that the anchoring tool 6 rotates with respect to the suspension bolt 25, and therefore the temporary support device 4. The position of is stable.

  FIG. 8 is a schematic cross-sectional view of the temporary support device 4 showing the difference in the scaffold load transmission path related to the structure of the mooring portions 61 and 62.

  FIG. 8A shows the mooring tool 6 configured to sandwich the suspension bolt 25 from both sides. The mooring portions 61 and 62 have a symmetrical cross section, and do not include a portion overlapping vertically. Further, the mooring tool 6 shown in FIG. 8B has the structure shown in FIGS. 4 to 7, and has a lunch box-like configuration in which the mooring part 61 entirely surrounds the mooring part 62. The height of the mooring part 61 is larger than the height of the mooring part 62, the lower end bent part 61c overlaps with the lower end bent part 62c in a state positioned below the lower end bent part 62c, and the upper end bent part 61b is an upper bent part. It overlaps with the upper side bending part 62b in the state located on the upper side of 62b. Furthermore, the mooring tool 6 shown in FIG. 8C has a configuration in which mooring portions 61 and 62 having the same height are arranged in steps. The lower end bent portion 61c overlaps with the lower end bent portion 62c in a form positioned above the lower end bent portion 62c, and the upper end bent portion 61b also overlaps with the upper bent portion 62b in a form positioned above the upper bent portion 62b.

  The scaffold load F of the horizontal member 3 shown in each figure acts on the suspension bolt 25 from the female screw halves 70 and 80 as the load P. In the mooring tool 6 shown in FIG. 8A, since the transmission path for transmitting the scaffold load F from the mooring part 61 to the mooring part 62 is limited, the portion located in the load transmission path is locally thickened or reinforced. Alternatively, the mooring portions 61 and 62 need to be thickened or strengthened as a whole. On the other hand, in the anchoring tool 6 shown in FIG. 8B, most of the scaffold load F is transmitted to the anchoring part 62 through the weights of the upper end bent parts 61b and 62b as shown as the vertical load F ′. For this reason, also in the mooring tool 6 shown in FIG. 8 (B), the transmission path is limited, and the upper end bent portions 61b and 62b are thickened or reinforced, or the mooring portions 61 and 62 are thickened as a whole. There is a need for fleshing or increasing strength. On the other hand, in the anchoring device 6 shown in FIG. 8C, as shown as the vertical load F ″, most of the scaffold load F is the overlap between the upper bent portions 61b and 62b and the lower bent portions 61c and 62c. 8C. Therefore, in the anchoring tool 6 shown in Fig. 8 (C), the load transmission path is dispersed and stress concentration is unlikely to occur. In addition, the overall weight can be reduced without increasing the thickness or strength, and the weight of the device can be reduced.

  Therefore, in order to manufacture the mooring tool 6 from a relatively thin material or a relatively low strength material and to reduce the weight thereof, the lunch box shown in FIG. 8B is used rather than the sandwiching structure shown in FIG. The configuration of the form is preferable, and more preferably, the configuration of the stepped form shown in FIG.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments, and various changes or modifications can be made within the scope of the present invention described in the claims. Needless to say, such modifications or variations are also included in the scope of the present invention.

  For example, the design of the pivot part can be changed to another structure such as a hinge or a hinge.

  Further, instead of the torsion spring (torsion coil spring), a spring or rubber having another structure may be used as the biasing means or the pressing means.

  The present invention is applied to a temporary support device for a ceiling scaffold, and in particular, a temporary ceiling scaffold for supporting a scaffold such as a construction scaffold by a ceiling suspension bolt in a ceiling back space of a building such as an existing building. It is preferably applied to a support device. According to the temporary support device of the present invention, a ceiling support scaffold can be quickly and stably supported by a ceiling suspension bolt of an existing building that does not include a preliminary or additional nut for supporting the ceiling support scaffold. Therefore, its practical value is remarkable.

DESCRIPTION OF SYMBOLS 1 Ceiling back scaffolding 2 Scaffolding board 3 Horizontal member 4 Temporary support apparatus 5 Holding tool 6 Mooring tool 25 Ceiling suspension bolts 61 and 62 Mooring part 63 Pivoting part 66 Restraint tool (stopper)
70, 80 Female screw half R Indoor space S Ceiling space

Further, although not related to the scaffold support structure, Japanese Patent No. 4781090 related to Japanese Patent Application No. 2005-335257 filed by one of the present applicants as a kind of temporary support system using a ceiling suspension bolt includes safety A hook holding device for locking a belt to a ceiling suspension bolt or the like is described. This hook holding device is for mooring a hook of a safety band such as an operator to a ceiling suspension bolt. The hook holding device has a pair of opening and closing plates, and each opening and closing plate is formed with a locking portion obtained by dividing a female screw. A ring portion capable of hooking a safety belt hook is attached to the opening / closing plate. In this hook holding device, when the left and right opening / closing plates are closed and the locking portions are locked to the ceiling hanging bolts, the locking portions of the opening / closing plates can be moored to the ceiling hanging bolts. An operator or the like can moor the safety belt to the ceiling suspension bolt by hooking the hook of the safety belt to the ring portion.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a ceiling hanging bolt for an existing building that does not include a preliminary or additional nut for supporting a ceiling scaffolding. Therefore, it is an object to provide a temporary support device for a ceiling back scaffold and a method for constructing the same.

According to one embodiment of the present invention, the retainer is attached to both the left and right tethers. Preferably, the holder is a single tube scaffolding clamp (clamp), and the horizontal member is a single tube for a single tube scaffold.

ADVANTAGE OF THE INVENTION According to this invention, the ceiling back which can support a ceiling back scaffold quickly and stably by the ceiling suspension bolt of the existing building which does not have the preliminary | backup or additional nut for supporting a ceiling back scaffold. A temporary support device for a scaffold and a construction method thereof can be provided.

FIG. 1 is a perspective view showing an overall configuration of a ceiling structure provided in an existing steel structure building. FIG. 2 is a longitudinal sectional view of the ceiling structure cut in a direction parallel to the beam. FIG. 3 is a longitudinal sectional view of the ceiling structure cut in a direction orthogonal to the beam. FIG. 4A to FIG. 4D are a front view, a rear view, a plan view, and a bottom view showing the structure of the temporary support device. In FIGS. 4A and 4B, the illustration of the clamp (holding tool) is omitted. 5 (A) to 5 (D) are cross-sectional views taken along lines II, II-II, III-III, and IV-IV in FIGS. 4 and 5, respectively. FIG. 5F is a right side view and a left side view of the temporary support device. In each figure of FIG. 5, illustration of a clamp (holding tool) is omitted. 6A to 6C are cross-sectional views showing a process of engaging the temporary support device with the ceiling suspension bolt. FIGS. 7A to 7C are a longitudinal sectional view and a plan view showing a state where the temporary support device is engaged with the ceiling suspension bolt. FIG. 8 is a schematic cross-sectional view of the temporary support device showing the difference in the scaffold load transmission path related to the structure of the temporary support device.

A state in which the plurality of anchoring devices 6 are anchored to the suspension bolt 25 in this manner is shown in FIGS. In use of the temporary support device 4, each end of the horizontal member 3 for supporting the scaffold plate 2 is fastened (clamped) to the holding tool 5 supported by the anchoring tool 6, and is in the form of a support beam at both ends. Suspended in the ceiling space S. Both ends of the horizontal member 3 are tightened by the holders 5 arranged at intervals in a direction perpendicular to the laying direction of the scaffold plate 2, and the end portions of the respective scaffold plates 2 are laid on the respective horizontal members 3. The

Claims (7)

In the temporary support device for the ceiling underfloor scaffold for supporting the ceiling underfloor scaffold by the ceiling suspension bolts constituting the ceiling structure,
An openable and closable mooring tool comprising left and right mooring parts interconnected pivotally by pivot means;
A retainer that is attached to at least one of the mooring portions and releasably holds a scaffold for supporting a scaffold plate;
On the inner side in the pivotal direction of each of the mooring portions, a female screw half that fits into the male screw of the ceiling suspension bolt is integrally formed,
The female screw halves of the left and right anchoring portions cooperate with the female screw that is screwed to the suspension bolt substantially over the entire circumference of the suspension bolt in a state where the anchoring portion is closed by the pivot means. Formed,
The holder is restricted or prevented from rotating around the ceiling suspension bolt by integrating the horizontal member and the holder, and supported by the ceiling suspension bolt by screwing the female screw half and the ceiling suspension bolt. A temporary support device for a ceiling scaffolding, characterized in that:   The temporary support device according to claim 1, wherein the holder is formed of a fastener for a single pipe scaffold, and the horizontal member is a single pipe for a single pipe scaffold.   The mooring portion is a box-shaped or casing-shaped metal member in which the upper and lower edges of a metal plate extending in the vertical direction are bent or bent inward in the pivot direction, and the pivot means pivots the metal member. The temporary shaft according to claim 1 or 2, further comprising a pivot shaft or a pivot center shaft that is supported or supported so as to be movable or pivotable, or a hinge member or a hinge that pivotally connects the metal member. Support device.   The temporary support device according to claim 3, further comprising: an urging unit that urges or presses the metal member in a pivoting direction; and a closed position holding unit that constrains the anchoring portion at a closed position.   The upper edge and the lower edge of the metal member to which the holder is attached are in contact with the upper edge and the lower edge of the metal member to which the holder is not attached, respectively. The temporary support device according to claim 3 or 4, wherein the temporary support device is distributed to the left and right metal members via an upper edge and a lower edge.   The temporary support device according to any one of claims 1 to 4, wherein the holder is attached to both the left and right mooring portions. A method for constructing a ceiling scaffold using the temporary support device according to any one of claims 1 to 6,
After the mooring portion is opened and the mooring tool is positioned so that the female screw half faces the suspension bolt, the mooring portion is closed and the female screw half is screwed to the outer screw of the suspension bolt,
Holding the horizontal member by the holder;
The scaffold plate is suspended in the ceiling space by the horizontal member supported at both ends, or two places or two parts spaced apart by the holder, and a scaffold is formed in the ceiling space. To build a ceiling scaffolding.

Images