JP2015028270A - Ceiling material fall prevention structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ceiling material fall prevention structure that can effectively prevent a ceiling material from falling while improving beauty of a ceiling and side walls, and also can improve operation efficiency by actualizing easy fitting and replacing operation for members.SOLUTION: A ceiling material fall prevention structure 1 includes: a connection member 11 having one side connected to a suspension bolt 101; a long-sized support member 12 connected to the other side of the connection member and penetrating a ceiling board 105 vertically; a thin board member 13 supported by the support member and installed on an under surface 105a of the ceiling board so as to prevent the ceiling board 105 from falling; and four protection wire materials 21 arranged on the under surface 105a of the ceiling board 105 so as to prevent a ceiling material from falling. The four protection wire materials 21 are connected to the thin board member 13 through the support member 12 and a tubular body 22.

Description

  The present invention relates to a ceiling material fall prevention structure that prevents a ceiling material attached to a ceiling in a building from falling due to shaking such as an earthquake.

  For example, as shown in FIG. 10, the conventional ceiling material fall prevention structure is extended horizontally under the ceiling bases 203 and 204, with the wire 212 having an end fixed to the building housing 213 in tension. A ceiling vibration reduction structure in which 212 and a ceiling base 203 are connected has been proposed. According to this structure, it is possible to reduce vibration of the ceiling 200 having a configuration in which the ceiling material 205 is fixed to the lower surfaces of the ceiling bases 203 and 204 (Patent Document 1). Further, as shown in FIG. 11, a ceiling material 221 in which a plurality of ceiling members 213 are connected by a joiner 215 is formed, and the ceiling material 221 is locked to a suspension wire 219 via a joiner 215 and a suspension fitting 217. Has been proposed. According to this structure, it can be removed and reused when exchanging the ceiling equipment, and the danger due to a drop during an earthquake can be avoided (Patent Document 2).

JP 2008-121371 A JP 09-302837 A

  However, in the conventional structure as shown in FIG. 10, since the wires are installed below the ceiling member and both ends thereof are fixed to the building frame by the locking members, the aesthetic appearance of the ceiling or the side walls is impaired. Moreover, in the conventional structure as shown in FIG. 11, the fixed part of the ceiling material is on the upper side of the ceiling, and an operator has to enter the back of the ceiling at the time of construction or replacement to install or replace the member. Becomes complicated.

  The object of the present invention is to effectively prevent the ceiling material from falling while improving the aesthetics of the ceiling and side walls, and in addition, to realize simple attachment and replacement work of members, thereby improving work efficiency. It is in providing the ceiling material fall prevention structure which can do.

  In order to achieve the above object, a ceiling material fall prevention structure according to the present invention is a ceiling material fall prevention structure that prevents a ceiling material attached via suspension bolts from falling, and prevents the ceiling material from falling. And at least one protective wire arranged on the lower surface of the ceiling plate, and a locking member connected to an end of the at least one protective wire given a predetermined tension on the lower surface of the ceiling plate, And a connection member that is attached to the suspension bolt and connects the locking member.

  Preferably, the locking member has a flat portion that supports the ceiling member in a flat surface.

  More preferably, the locking member is provided at a joint of a plurality of ceiling panels constituting the ceiling material.

  According to the present invention, at least one protective wire is disposed on the lower surface of the ceiling plate so as to prevent the ceiling material from falling. In addition, a locking member is disposed on the lower surface of the ceiling plate, and an end of at least one protective wire that is given a predetermined tension is connected to the locking member. Further, the locking member is connected to the suspension bolt by the connection member attached to the suspension bolt. As described above, when the thin plate member and at least one protective wire connected to the thin plate member are installed on the lower surface of the ceiling plate, the weight burden area of the ceiling material can be increased when the ceiling material falls. It is possible to effectively prevent the ceiling material from falling. In addition, since the locking member is installed on the lower surface of the ceiling board, there are very few parts protruding downward from the lower surface of the ceiling board, and there is no need for a member to be attached to the side wall of the building, improving the aesthetics of the ceiling and the side wall. be able to. Furthermore, since the thin plate member and at least one protective wire are installed on the lower surface of the ceiling plate, the number of man-hours required for the worker to enter the back of the ceiling and install or replace the member can be reduced. Exchange work can be realized and work efficiency can be improved.

It is sectional drawing which shows the structure of the building ceiling to which the ceiling material fall prevention structure which concerns on embodiment of this invention is applied. It is a top view which shows the unit of the ceiling material fall prevention structure installed in the building ceiling of FIG. It is the elements on larger scale which show roughly the composition of the ceiling material fall prevention structure in the X section of Drawing 1, (a) is a side view, (b) is a sectional view which meets line BB of (a), (c) ) Is a side view showing the main part of the connecting member in FIG. FIG. 4 is an exploded perspective view of FIG. 3. It is the elements on larger scale of the ceiling material fall prevention structure in the Y section of Drawing 1, (a) is a sectional view and (b) is a plane bottom view. FIG. 6 is an exploded perspective view of FIG. 5. It is a figure which shows the thin-plate member attached to the Z section of FIG. 2, (a) is a top plan view, (b) is a top plan view. (A)-(e) is a figure explaining the construction method of a ceiling material fall prevention structure. (A) is sectional drawing which shows the modification of the thin plate member in FIG. 6, (b) is sectional drawing which shows the state in which the thin plate member of (a) was attached. It is a side view which shows an example of the conventional ceiling material fall prevention structure. It is a side view which shows another example of the conventional ceiling material fall prevention structure.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a configuration of a building ceiling to which a ceiling material fall prevention structure according to an embodiment of the present invention is applied, and FIG. 2 is a diagram of a ceiling material fall prevention structure installed on the building ceiling of FIG. It is a top view (view figure) which shows a unit. The ceiling material fall prevention structure of the present invention has a mechanism for preventing the fall of ceiling materials such as a field edge receiver, a field edge, and a ceiling board when a building rolls due to an earthquake or the like. Hereinafter, in this embodiment, a ceiling material fall prevention structure using the strings method and a construction method thereof will be described.

  As shown in FIG. 1, in a ceiling of an existing building to which the ceiling material fall prevention structure 1 of the present invention is applied, a suspension bolt 101 is fixed to a slab (or beam) through a washer. A hanger 102 is attached to the lower end of the suspension bolt 101, and a ceiling board 105 is fixed to the hanger via a field edge receiver 103 and a field edge 104 (FIG. 3). The suspension bolts 101 are installed at intervals of, for example, 900 mm, and the ceiling material fall prevention structure 1 is installed at intervals of, for example, 1800 mm, that is, every two suspension bolts 101. In this embodiment, for convenience of explanation, the ceiling material fall prevention structure 1 is installed for every two suspension bolts, but may be installed for every other number such as every three or every four bolts. .

  In addition, as shown in FIG. 2, a plurality of ceiling material fall prevention structures 1 are arranged on the matrix on the ceiling plate 105. In this ceiling material fall prevention structure 1, a circular thin plate member, which will be described later, is installed on the lower surface of the ceiling plate 105, and four wire members, which will be described later, radiate at 90 degree intervals centering on this thin plate member. Is arranged. Each wire connects two adjacent thin plate members. In this way, the plurality of thin plate members arranged on the matrix are connected by the wire, so that the entire ceiling plate 105 is supported by the plurality of thin plate members and the wire.

  3 is a partially enlarged view schematically showing the configuration of the ceiling material fall prevention structure 1 in the X part of FIG. 1, (a) is a sectional view taken along line BB in (b), and (b) is shown in FIG. Side view (c) is a connection diagram showing the main part of the connection member in (b). FIG. 4 is an exploded perspective view of FIG. The structure shown in FIGS. 3 and 4 is installed above the ceiling plate 105, that is, behind the ceiling.

  As shown in FIGS. 3 and 4, the ceiling material fall prevention structure 1 has one connecting member 11 connected to the suspension bolt 101 and the other connected to the other of the connecting members, and extending through the ceiling plate 105 in the vertical direction. A scale-like support member 12 and a thin plate member 13 (locking member) supported by the support member and installed on the lower surface 105a of the ceiling plate 105 so as to prevent the ceiling material from falling are provided.

  The support member 12 is installed in parallel with the suspension bolt 101 and is disposed along a substantially vertical direction. The shape of the support member 12 is not particularly limited, but an accessory bolt having the same shape as the suspension bolt 101 is preferably used.

  The connection member 11 has a clamping portion 14 that clamps both the suspension bolt 101 and the support member 12. Specifically, the sandwiching portion 14 includes a pair of plate members 15 and 16 that sandwich the shaft portion 101 a of the suspension bolt 101 and the shaft portion 12 a of the support member 12. A plurality of holes 15a and 16a are respectively formed (FIG. 4). When the bolts 17 are inserted into the holes 15a and 16a and temporarily fixed with the nuts 18, two insertion passages L1 and L2 arranged in parallel in a substantially vertical direction are formed between the pair of plate members 15 and 16 (FIG. 3A )).

  The shaft portion 12a of the support member 12 is inserted through one of the insertion passages L1, and the shaft portion 101a of the suspension bolt 101 is inserted through the other insertion passage L2. The support member 12 and the suspension bolt 101 are inserted into the paths L1 and L2, respectively, and the nut 18 is fastened to the bolt 17, so that the support member 12 and the suspension bolt 101 are sandwiched between the pair of plate members 15 and 16, thereby being supported. The member 12 is fixed to the suspension bolt 101 via the connection member 11.

  Further, the pair of plate members 15 and 16 are locked above the nuts 19 a and 19 b that are screwed into the shaft portion 101 a of the suspension bolt 101. The support member 12 is locked to a pair of plate members 15 and 16 positioned below the locking members 20a and 20b locked to the shaft portion 12a of the support member. In the support member 12, a locking member 20 c is screwed below the pair of plate members 15 and 16 to support the lower surfaces of the pair of plate members 15 and 16. The locking members 20a, 20b, and 20c are made of nuts that are screwed into the shaft portion 12a of the support member 12, for example.

  The support member 12 is installed in a state where the support member 12 is inserted into a hole described later formed in the ceiling plate 105, and a lower end portion of the support member 12 projects below the ceiling plate 105 by a predetermined length. The thin plate member 13 is attached to a lower end portion (a portion protruding from the ceiling plate 105) of the support member 12.

  FIG. 5 is a partially enlarged view of the ceiling material fall prevention structure 1 in the Y part of FIG. 1, (a) is a sectional view, and (b) is a plan view. FIG. 6 is an exploded perspective view of FIG.

  As shown in FIGS. 5A, 5B, and 6, the ceiling material fall prevention structure 1 includes four protective wires 21 arranged on the lower surface 105a of the ceiling plate 105 so as to prevent the ceiling material from falling. Have. The protective wire 21 is a stretchable wire having a predetermined tensile strength, and is, for example, a twisted yarn made of polyethylene. At both ends of the protective wire 21, an annular portion 21 b is formed by a caulking material 21 a and is locked to a tubular body described later. These four protective wires 21 are connected to the thin plate member 13 via the support member 12 and a tubular body described later. For convenience of explanation, the protective wire 21 in FIG. 5A is separated from the lower surface 105a of the ceiling plate 105, but in reality, the four protective wires 21 are in contact with the lower surface 105a.

  On the upper surface 13 a side of the thin plate member 13, a tubular body 22 that locks the end portions of the four protective wire members 21 to which a predetermined tension is applied is provided. The tubular body 22 is a member into which the support member 12 is inserted, and is, for example, a rubber resin pipe having an inner diameter of 10 mm and a length of 10 mm. The tubular body 22 is disposed in contact with a long nut 23 positioned above the tubular body 22, and is positioned at a predetermined position of the support member 12 by the long nut 23.

  The thin plate member 13 is a disk made of resin or metal and having a thickness of, for example, 5.0 mm and a diameter of 200 mm. A flat surface portion is formed on the upper surface 13a, and a C or R chamfering process is performed on the peripheral edge portion. It has been subjected. A through hole 13 b (FIG. 6) is formed at the center of the thin plate member 13. The support member 12 is inserted into the through hole 13b, and the lower surface 13c is supported by a cap nut 24, preferably a hexagonal decorative nut. Further, four sponge members 25 arranged at intervals of 90 ° are attached to the upper surface 13a.

  The sponge material 25 has a fan shape with a central angle of approximately 90 °, and its thickness is, for example, 7.0 mm. When the thin plate member 13 is attached to the lower surface 105 a of the ceiling plate 105, the upper surfaces 25 a of the four sponge members 25 are in contact with or pressed against the lower surface 105 a of the ceiling plate 105, whereby the thin plate member 13 is substantially parallel to the ceiling plate 105. To be kept.

  Further, the thin plate members 13 are installed on the ceiling plate 105 at a predetermined interval as described above (FIG. 2), and are preferably installed at predetermined intervals in the joints of a plurality of ceiling panels constituting the ceiling plate 105. By arranging the thin plate member 13 at the joint of the ceiling panel, it is possible to achieve a design leveling. Moreover, by making the color of the lower surface 13c of the thin plate member 13 the same color as the lower surface 105a of the ceiling plate 105, it is possible to suppress the loss of the aesthetic appearance of the ceiling as much as possible.

  Further, in the plan view of FIG. 2, a thin plate member 33 connected to the thin plate member 13 by one protective wire 21 is attached to the peripheral portion of the ceiling plate 105 (Z portion). As shown in FIGS. 7A and 7B, the thin plate member 33 is a disk made of resin or metal and having a thickness of, for example, 2.3 mm and a diameter of 60 mm. Is given. Four sponge members 35 are attached to the upper surface 33a of the thin plate member 33, and a cap nut 34 is attached to the lower surface 33c. Since the attachment form of the thin plate member 33 to the ceiling plate 105 is basically the same as that of the thin plate member 13, the description thereof is omitted.

  Next, the construction method of the ceiling material fall prevention structure 1 will be described with reference to FIGS. 8 (a) to 8 (e).

  First, a through hole 106 is formed in a predetermined position of the ceiling plate 105, preferably in a connecting portion of a plurality of ceiling panels constituting the ceiling plate 105 (FIG. 8A). The pipe portion 107a of the pipe washer 107 is fitted into the through hole 106, and the washer portion 107b is fixed to the lower surface 105a of the ceiling plate 105 (FIG. 8B).

  Next, the connection member 11 and the support member 12 are attached to the existing suspension bolt 101. In the main installation work, when an existing opening 105b for inspection or the like is provided in the vicinity of the through hole 106 (FIG. 3A), the operator manually moves from the lower side of the ceiling plate 105 to the opening 105b. Then, the connection member 11 and the support member 12 are temporarily fixed at predetermined positions of the suspension bolt 101. Then, the support member 12 is inserted into the pipe portion 107a, and the support member 12 is fixed at a position where the lower end portion 12b protrudes below the washer portion 107b.

  Thereafter, the long nut 23 and the tubular body 22 are attached to the support member 12. Then, the annular portion 21b is inserted into the tubular body 22, and the protective wire 21 is locked to the tubular body 22 with a predetermined tension applied (FIG. 8C). This operation is repeated to lock the four protective wires 21 to the tubular body 22. Next, the tubular body 22 on which the four protective wires 21 are locked is positioned using the positioning nut 108. Specifically, the positioning nut 108 is attached to the support member 12, and the positioning nut is brought into contact with the lower surface of the tubular body 22. When the positioning nut 108 is screwed and moved upward, the tubular body 22 and the four protective wires 21 move upward as the positioning nut 108 moves. Thereafter, the tubular body 22 is moved to a position where the protective wire 21 contacts the lower surface 105 a of the ceiling material 105. When the positioning of the tubular body 22 and the four protective wires 21 is completed, the upper surface of the tubular body 22 is supported by the long nut 23.

  Next, from the lower side of the ceiling plate 105, a receiving plate (not shown) and the through hole 13b of the thin plate member 13 are inserted into the lower end portion 12b of the support member 12, and a cap nut 24 is attached (FIG. 8D). The cap nut 24 is fastened to the support member 12 in cooperation with the long nut 23. Thereby, the lower surface 13 c of the thin plate member 13 is firmly supported by the support member 12 via the cap nut 24. At this time, the upper surface 25a of the sponge material 25 attached to the upper surface 13a of the thin plate member 13 comes into contact with the lower surface 105a of the ceiling plate 105, whereby the thin plate member 13 is held parallel to the ceiling material 105 (FIG. 8 ( e)).

  As described above, according to the present embodiment, the four protective wire members 21 are arranged on the lower surface 105a of the ceiling plate 105 so as to prevent the ceiling material from falling. Further, the thin plate member 13 is disposed on the lower surface 105 a of the ceiling plate 105, and the annular portions 21 b of the four protective wire members 21 to which a predetermined tension is applied are connected to the thin plate member 13. Further, the thin plate member 13 is connected to the suspension bolt 101 by the connection member 11 attached to the suspension bolt 101. In this way, by installing the thin plate member 13 and the four protective wire members 21 connected thereto on the lower surface 105a of the ceiling plate 105, when the ceiling material falls, the weight bearing area of the ceiling material is increased. It is possible to effectively prevent the ceiling material from falling.

  In particular, in the conventional method, for example, compared with a structure in which a support member is inserted into a ceiling plate provided with a through hole, and the support member is fixed to the ceiling plate with a member such as a washer, according to the structure of the present invention, the ceiling material The weight per unit area when falling can be reduced, and the ceiling material can be more reliably prevented from falling. Moreover, when it is assumed that the ceiling material of the same weight falls, the number of installation points of the ceiling material fall prevention structure 1 can be made smaller than before.

  Further, since the thin plate member 13 is installed on the lower surface 105a of the ceiling plate 105, the portion protruding downward from the lower surface 105a of the ceiling plate 105 is extremely reduced, and a member to be attached to the side wall of the building becomes unnecessary, and the ceiling and the side wall Can improve aesthetics. Furthermore, since the thin plate member and the four protective wire members 21 are installed on the lower surface 105a of the ceiling plate 105, the number of man-hours required for an operator to enter the back of the ceiling and attach or replace the member can be reduced. Installation / replacement work can be realized and work efficiency can be improved. In particular, when it is constructed in a building having a large span ceiling, it is possible to greatly improve the work efficiency of installation and replacement. Further, since the downward projection from the lower surface 105a of the ceiling plate 105 is extremely reduced, it is possible to effectively use the space near the lower side of the ceiling.

  As mentioned above, although the ceiling material fall prevention structure which concerns on the said embodiment was described, this invention is not limited to description embodiment, Various deformation | transformation and a change are possible based on the technical idea of this invention.

  For example, in the present embodiment, the thin plate member 13 is provided with the through hole 13b, and the support member 12 is inserted into the through hole and fixed with the cap nut 24. However, the thin plate member without the through hole is used. Also good. For example, as shown in FIG. 9, the thin plate member 43 may include a thin plate portion 44 and a cap nut 45 attached to the upper surface 44a of the thin plate portion. When the thin plate member 43 is used, the thin plate member 43 is positioned by screwing the support member 12 so that the cap nut 45 is positioned inside the tubular body 46. Thereby, the part which protrudes below from the lower surface 44b of the thin plate member 43 can be eliminated at all, and the aesthetic appearance of the ceiling can be improved.

  In the present embodiment, an accessory bolt having the same shape as the suspension bolt 101 is preferably used as the support member 12, but is not limited thereto. Since the support member 12 and the suspension bolt 101 are preferably sandwiched between a pair of substantially parallel plates 15 and 16, the support member 12 has the same width as the suspension bolt 101 in the vertical direction of the pair of plates 15 and 16. If it has, you may have another shape.

  Moreover, in the said embodiment, although the shape of the thin plate members 13 and 33 is circular, not only this but other shapes, such as a polygon and an ellipse, may be sufficient.

  In the present embodiment, the protective wire 21 is a polyethylene twisted yarn. However, as long as the wire has a predetermined strength and stretchability, it may be a material such as other resin or metal, or one or You may be comprised with multiple pieces.

  In the present embodiment, the sponge members 25 and 35 have a fan shape with a central angle of approximately 90 °. However, the present invention is not limited to this, and the sponge members 25 and 35 may have other shapes such as a circle, an ellipse, or a polygon. Good. Further, as long as the thin plate members 13 and 33 can be kept substantially parallel to the ceiling plate 105, members made of other materials may be used.

DESCRIPTION OF SYMBOLS 1 Ceiling material fall prevention structure 11 Connection member 12 Support member 12a Shaft part 12b Lower end part 13 Thin plate member 13a Upper surface 13b Through-hole 13c Lower surface 14 Clamping part 15,16 A pair of board | plate material 15a, 16a Hole 17 Bolt 18 Nut 19a, 19b Nut L1 , L2 Insertion path 20a, 20b Locking material 20c Locking material 21 Protective wire material 21a Caulking material 21b Ring portion 22 Tubular body 23 Long nut 24 Cap nut 25 Sponge material 25a Upper surface 33 Thin plate member 33a Upper surface 35 Sponge material 34 Cap nut 43 Thin plate member 44 Thin plate portion 44a Upper surface 44b Lower surface 45 Cap nut 100 Slab 101 Suspension bolt 101a Shaft portion 102 Hanger 103 Field edge receiver 104 Field edge 105 Ceiling plate 105a Bottom surface 105b Opening 106 Through hole 107 Pipe washer 107a Pipe portion 1 7b washer portion 108 positioning nut

Claims (3)

A ceiling material fall prevention structure for preventing a ceiling material attached via a suspension bolt from falling,
At least one protective wire disposed on the lower surface of the ceiling plate to prevent the ceiling material from falling;
A locking member connected to an end of the at least one protective wire member given a predetermined tension on the lower surface of the ceiling plate,
And a connecting member that is attached to the suspension bolt and connects the locking member.   The ceiling material fall prevention structure according to claim 1, wherein the locking member has a flat surface portion that supports the ceiling material in a flat surface.   The ceiling material fall prevention structure according to claim 1, wherein the locking member is provided at a joint of a plurality of ceiling panels constituting the ceiling material.