JP2019218847A - Ceiling board fall prevention device and ceiling structure - Google Patents

Abstract

To provide a ceiling board fall prevention device and a ceiling structure having an excellent workability without damaging a fall prevention function of the ceiling board.SOLUTION: In a ceiling structure consisting of a ceiling board 11, a plurality of support bars 12 for supporting the ceiling board 11 and the support bar receipt member 13 for coupling and anchoring the plurality of support bars 12, a fall of the ceiling board 11 is prevented. An abutment member 2 is provided which is arranged in a direction intersecting with the support bar 12A (12) and abuts with a surface 11a of an outdoor side S1 of the ceiling board 11. An end part of the abutment member 2 is anchored to the support bar 12A (12).SELECTED DRAWING: Figure 3

Description

  The present invention relates to a ceiling plate fall prevention device and a ceiling structure. More specifically, a ceiling plate for preventing the ceiling plate from falling in a ceiling structure including a ceiling plate, a plurality of support bars for supporting the ceiling plate, and a support bar receiving member for connecting and fixing the plurality of support bars. The present invention relates to a fall prevention device and a ceiling structure.

  2. Description of the Related Art Conventionally, as a ceiling plate fall prevention device as described above, for example, those described in Patent Documents 1 and 2 are known. In Patent Literature 1, a sheet to which one end of a wire is connected is provided on a surface of a ceiling plate on the indoor side (FIGS. 5 and 6 of the literature). In Patent Literature 2, a penetrating member that penetrates the ceiling plate is provided on the indoor side surface of the ceiling plate, and the penetrating member is engaged with a mounting member provided on the back surface of the ceiling plate, and the mounting member is connected to a hanging member with a wire. It is connected. However, both methods require screw fastening and wire connection work in many places, and improvement in workability (workability) has been desired.

JP 2014-173394 A JP 2014-114594 A

  In view of such a conventional situation, an object of the present invention is to provide a ceiling plate fall prevention device and a ceiling structure which are excellent in workability without impairing a ceiling plate fall prevention function.

  To achieve the above object, the features of the ceiling plate fall prevention device according to the present invention include a ceiling plate, a plurality of support bars for supporting the ceiling plate, and a support bar receiving member for connecting and fixing the plurality of support bars. In a configuration for preventing the ceiling plate from dropping in a ceiling structure comprising a contact member, the contact member is provided in a direction intersecting the support bar and abuts on an outdoor surface of the ceiling plate. Is fixed to the support bar.

  According to the above configuration, since the contact member is disposed in a direction intersecting the support bar and contacts the outdoor surface of the ceiling plate, the ceiling plate is sandwiched between the contact member and the support bar. The board can be prevented from falling off. Moreover, since both ends of the contact member are fixed to the support bar, the contact member is held between the support bars simply by fixing both ends of the contact member, and the workability of the ceiling plate is prevented without impairing the fall prevention function. Improvement is possible.

  In the above configuration, the abutting member includes a wedge member at one end thereof fitted into a concave portion formed in the support bar, and the wedge member has an operation piece operated by an operator on a main body. It is preferable that the one end is fitted in the concave portion by being erected and being pressed by the operation piece. By providing (providing) the wedge member on the contact member, the contact member can be fixed to the support bar by operating the wedge member, so that the workability is good.

  In such a case, it is preferable that the wedge member is slidably attached to the contact member along a longitudinal direction thereof. The workability is extremely high because the slide operation is sufficient.

  Further, one end of the wedge member may be a bent portion formed by folding an end of the main body. Accordingly, when the one end of the wedge member is fitted into the concave portion of the support bar, the bent portion may be bent, and the workability is good. In addition, since the end of the main body is formed by folding back, it is possible to prevent the main body from falling off from the recess.

  A plurality of grooves may be formed on the upper surface of the bent portion at appropriate intervals in the longitudinal direction of the contact member. By forming a plurality of grooves in accordance with the shape (depth) of the concave portion of the support bar, versatility can be improved.

  The contact member may have a hanging part extending vertically from the head toward the indoor side. Thereby, a ceiling board can be arrange | positioned by making a ceiling board stick (butt) with a hanging part, and workability is good.

  In such a case, a plate-like portion substantially parallel to the head may be provided at a lower end of the hanging portion. This allows the ceiling plate to be supported (held) by the plate-shaped portion, thereby further preventing the ceiling plate from falling.

  On the other hand, the abutting member includes a wedge member having one end fixed to the support bar at an end thereof, and the wedge member has a screwed portion that is screwed to the support bar and is provided upright on the main body. It does not matter. By fixing the wedge member to the support bar by the screwed portion, the ceiling plate is sandwiched between the contact member and the support bar, so that the ceiling plate can be prevented from falling off.

  In order to achieve the above object, other features of the ceiling plate fall prevention device according to the present invention include a ceiling plate, a plurality of support bars for supporting the ceiling plate, and a support bar support for connecting and fixing the plurality of support bars. In the configuration for preventing the ceiling plate from dropping in the ceiling structure including the member, a contact portion that contacts the outdoor surface of the ceiling plate, and an extension portion that is continuously formed from the contact portion, And a fixing portion provided at an end of the extension portion and fixed to the support bar.

  According to the above configuration, since the abutting portion of the wedge member abuts on the outdoor surface of the ceiling plate, the ceiling plate is sandwiched between the wedge member and the support bar, so that the ceiling plate can be prevented from falling off. Moreover, the ceiling plate can be held simply by being fixed to the support bar by the fixing portion provided at the end of the extension portion formed continuously from the contact portion, and the workability of the ceiling plate can be maintained without impairing the fall prevention function. Improvement is possible.

  In such a case, the fixing portion is a fitting portion that fits one end of the extension portion into the concave portion of the support bar, and maintains the horizontal state of the contact portion by the fitting. Preferably, the fitting portion has a pair of grooves on the upper and lower surfaces. Thereby, the connection between the wedge member and the support bar is strengthened, and the falling of the ceiling plate is suppressed.

  The contact portion may further include a gripping member gripped by an operator. Thereby, the workability is further improved, and the falling of the ceiling plate can be prevented by the grip portion.

  To achieve the above object, the features of the ceiling structure according to the present invention include a ceiling plate, a plurality of support bars for supporting the ceiling plate, a support bar receiving member for connecting and fixing the plurality of support bars, and the ceiling. In a configuration provided with a ceiling plate fall prevention device for preventing a plate from falling, the ceiling plate fall prevention device is disposed in a direction intersecting the support bar, and abuts against an outdoor surface of the ceiling plate. An end of the contact member is fixed to the support bar, and the ceiling plate is sandwiched between the contact member and the support bar.

  In order to achieve the above object, another feature of the ceiling structure according to the present invention is a ceiling plate, a plurality of support bars for supporting the ceiling plate, and a support bar receiving member for connecting and fixing the plurality of support bars, In a configuration provided with a ceiling plate fall prevention device that prevents the ceiling plate from falling, the ceiling plate fall prevention device is configured to be continuous with a contact portion that contacts the outdoor surface of the ceiling plate and the contact portion. And a wedge member having a fixed portion provided at an end of the extension portion and fixed to the support bar, wherein the wedge member is appropriately spaced from the support bar. A plurality of the ceiling plates are fixed, and the ceiling plate is sandwiched between the contact portions of the respective wedge members and the support bars.

  According to the above features of the ceiling plate fall prevention device and the ceiling structure according to the present invention, it is possible to improve workability without impairing the fall prevention function of the ceiling plate.

  Other objects, configurations and effects of the present invention will be apparent from the following embodiments of the present invention.

It is a side view showing an example of the ceiling structure using the ceiling plate fall prevention device according to the first embodiment of the present invention. FIG. 1B is a cross-sectional view of FIG. FIG. 1B is a sectional view taken along the arrow B in FIG. 1A. (A) is an enlarged view of a part C in FIG. 1c, and (b) is a view showing a contact member. FIG. 2A is an enlarged front view of a portion D in FIG. 1B, and FIG. 1B is a diagram illustrating a first support bar. (A) is an enlarged front view of a part E of FIG. 1b, and (b) is a view showing a second support bar. (A) is a partial enlarged view near the frame member of the F part of FIG. 1c, (b) is a figure which shows a frame member. It is a figure which shows a wedge member, (a) is a perspective view, (b) is a front view. It is a figure explaining a construction procedure. It is a figure explaining a construction procedure. It is a figure explaining a construction procedure. It is a figure explaining a construction procedure. It is a figure showing an example of a ceiling structure using a ceiling board fall prevention device concerning a second embodiment of the present invention. FIG. 12 is a partial enlarged cross-sectional view of a portion G in FIG. 11. It is a figure equivalent to FIG. 6 which shows the wedge member which concerns on 2nd embodiment. FIG. 2A is a diagram corresponding to FIG. 2A showing a modification of the contact member. It is a figure showing the modification of a wedge member. It is a figure showing other modifications of a wedge member.

Next, the first embodiment of the present invention will be described in more detail with reference to FIGS.
The ceiling plate fall prevention device 1 according to the present invention is applied to, for example, a so-called system ceiling 10 as shown in FIGS.
As shown in FIG. 1, the system ceiling 10 generally includes a ceiling plate 11, a plurality of support bars 12 for supporting the ceiling plate 11, and a channel material as a support bar receiving member 13 for connecting and fixing the plurality of support bars 12. (Lip grooved steel). In the example shown in the figure, the support bars 12 are arranged side by side at appropriate intervals in a direction X orthogonal to the longitudinal direction Y (line type), and the lighting fixture L is arranged along the orthogonal direction X (arrangement direction X). is set up. A frame member 14 as shown in FIG. 5B is provided at a longitudinal end of the support bar 12 to hold the ceiling plate 11.

  In the present embodiment, the support bar receiving member 13 is suspended and supported by a steel beam (H-section steel) as the support member 16 via the connection member 15, but the mode of the suspension support is not limited to this. I can't. The ceiling material 11 is a plate-like member (board, panel) such as a rock wool sound-absorbing plate and a gypsum board, but the material is not particularly limited.

  As shown in FIGS. 1 to 4, the ceiling plate fall prevention device 1 according to the present invention is disposed in a direction (orthogonal direction X) intersecting the support bar 12, and contacts the surface 11 a of the outdoor side S <b> 1 of the ceiling plate 11. It has an abutting member 2 to be in contact with. The ceiling plate fall prevention device 1 in the present embodiment further includes a wedge member 3 whose one end 3a is fitted to a concave portion 125 formed in the support bar 12 described later at an end of the contact member 2. The contact member 2 is held between the support bars 12 facing each other via the wedge member 3.

  Here, in the present embodiment, as shown in FIGS. 1A to 1C, the support bar 12 includes a first support bar 12A and a second support bar 12B. The first support bar 12A is used at an intermediate portion of one line of the system ceiling 10 in the arrangement direction X, and the second support bar 12B is used at an end of the line. The first and second support bars 12A and 12B are manufactured by, for example, extrusion of an aluminum material.

  As shown in FIG. 3, the first support bar 12A has a symmetrical shape with respect to the longitudinal direction Y, and has a pair of upper surface portions 121, 121, a pair of lower surface portions 122, 122, and upper and lower surface portions 121. , 122, and a pair of concave portions 125 formed between the upper and lower connection portions 123, 124. On the lower surface portion 122, a projection 128 facing the side end of the ceiling plate 11 is provided upright. The upper surface portion 121 is in surface contact with the lower flange 13 a of the channel material 13. The side end of the ceiling plate 11 is placed on the lower surface portion 122.

  On the other hand, the second support bar 12B has the same basic configuration as the first support bar 12A, as shown in FIG. Different from 12A. As shown in FIG. 5, the frame member 14 includes a flat portion 14a on which an end of the ceiling plate 11 is placed, a fixed portion 14b fixed to the first support bar 12A, a flat portion 14a and a fixed portion 14b. And a connecting portion 14c for connecting The connecting portion 14c is provided with a protruding portion 14d protruding toward the flat portion 14a (in the vertical direction Z). The ceiling plate 11 is inserted between the flat portion 14a and the protruding portion 14d (gap).

  As shown in FIG. 2B, the contact member 2 has a head 21 having a substantially rectangular cross section, and extends downward from the center of the head 21 (in the vertical direction Z toward the indoor side S2). (Extending) hanging portion 22. The head 21 has a space 23 into which a wedge member 3 to be described later is inserted, and an opening 24 communicating with the space 23 is formed above the head 21.

  As shown in FIG. 6, the wedge member 3 is formed by folding a substantially and substantially rectangular plate-shaped main body 31, an operation piece 32 erected on the other end 3 b of the main body 31, and one end 3 a of the main body 31. And a bent piece 34 bent toward the operation piece 32 via a bent portion 33 formed as described above. In the present embodiment, a groove 35 is formed on the upper surface of the bent piece 34. The contact member 2 and the wedge member 3 are made of, for example, plastic.

Next, the procedure of installing the ceiling plate fall prevention device 1 will be described with reference to FIGS.
First, the wedge member 3 is inserted into the space 23 from the operation piece 32 side from the end portion 2a of the contact member 2 (FIG. 7), and the operation piece 32 is operated (pressed with a finger) to form the space of the contact member 2. The inside of 23 is slid along the longitudinal direction (arrangement direction X) to bring the bent portion 33 into contact with the end 2a (FIG. 8). Although not shown, this is performed at both ends of the contact member 2. Then, the side end of the ceiling plate 11 is placed on the lower surface 122 of the support bar 12. The protruding portion 128 erected on the lower surface portion 122 prevents the ceiling plate 11 from being displaced with respect to the longitudinal direction (arrangement direction X) of the contact member 2.

  Next, the contact member 2 having the wedge member 3 inserted through the edge of the ceiling plate 11 is arranged (FIG. 9). At this time, the end 2a of the contact member 2 contacts the vicinity of the protruding portion 128 or the lower connecting portion 124, so that the displacement of the contact member 2 in the longitudinal direction (arrangement direction X) is similar to the ceiling plate 11. Is prevented. However, the wedge member 3 has not reached the opening 126 of the recess 125.

  Then, the operator presses the operation piece 32 of the wedge member 3 toward the opening 126 with a finger, slides the wedge member 3 in the space 23, and fits the bent portion 33 into the concave portion 125. At this time, one end 3 a of the wedge member 3 is fitted into the concave portion 125 by bending the bent portion 33. As a result, the groove 35 of the bent piece 34 and the opening 126 are fitted (FIG. 10). Therefore, the contact member 2 and the support bar 12 are firmly connected via the wedge member 3. In the vicinity of the wedge member 3, the lower surface 21 a of the head 21 abuts (presses) on the upper surface of the ceiling plate 11, and the lower surface portion 122 abuts on the lower surface of the ceiling plate 11. Therefore, the ceiling plate 11 is sandwiched between the head portion 21 and the lower surface portion 122 and does not fall off. In addition, the wedge members 3 at both ends of the contact member 2 only have to be fitted into the concave portions 125, so that there is no need to work at many places as in the above-mentioned patent document, and the working efficiency is extremely high. In addition, since the ceiling plate 11 is brought into close contact with the hanging portion 22 (butting), the lower end 22a is not exposed from the ceiling plate 11 and does not impair the appearance.

Next, a second embodiment of the present invention will be described. Note that the same members as those in the above-described embodiment are denoted by the same reference numerals.
In the first embodiment, the contact member 2 of the ceiling plate fall prevention device 1 has the wedge member 3 whose one end 3a is fitted into the concave portion 125 of the support bar 12 at the end 2a. However, in the second embodiment, as shown in FIGS. 11 and 12, the contact member 2 is omitted, and the wedge member 3 'is used as the ceiling plate fall prevention device 1'.

  The wedge member 3 ′ includes, for example, as shown in FIG. 13, a contact portion 36 that contacts the surface 11 a of the outdoor side S <b> 1 of the ceiling plate 11, an extension portion 37 formed continuously from the contact portion 36, A fixing portion 38 provided at an end of the extension portion 37 and fixed to the support bar 12 ′. The fixing portion 38 is a fitting portion that fits one end of the extension portion 37 into the concave portion 125 of the support bar 12 '. By this fitting, the horizontal state of the contact portion 36 is maintained. In addition, the contact part 36 corresponds to the main body part 31 of the first embodiment, and the bent part 33 and the bent piece 34 correspond to the extension part 37.

  In the first embodiment, the groove 35 is formed on the upper surface of the bent piece 34 of the wedge member 3. On the other hand, in the present embodiment, the fitting portion 38 as a fixing portion includes a groove portion 35 provided on the upper surface of the extension portion 37 and a second groove portion 39 provided on the lower surface of the contact portion 36. As shown in FIG. 12, since the upper opening edge 126a fits into the groove 35 and the lower opening edge 126b fits into the second groove 39, the connection becomes stronger, and the ceiling is formed only by the wedge member 3 '. The plate 11 can be prevented from falling off.

Finally, the possibility of yet another embodiment of the present invention is mentioned. Note that the same members as those in the above-described embodiment are denoted by the same reference numerals.
In the first embodiment, the hanging portion 22 of the contact member 2 is formed in a linear shape (plate shape) along the vertical direction Z. However, for example, as shown in FIG. 14, a plate-like portion 25 substantially parallel to the head 21 may be provided at the lower end of the hanging portion 22 '. Thus, the ceiling plate 11 is supported by the plate-shaped portion 25, and the ceiling plate 11 can be prevented from falling. However, in such a case, since the plate-shaped portion 25 is exposed to the indoor side S2, the above-described embodiment is superior in terms of design (aesthetic appearance).

  Further, the shape of the lower end 22a of the hanging portion 22 is not limited to a flat shape as in the above-described embodiment. For example, the lower end 22a may be formed in a hemispherical shape or may be formed sharply.

  In the first embodiment, the line-type system ceiling 10 in which the support bars 12 are juxtaposed at appropriate intervals in a direction X perpendicular to the longitudinal direction Y has been described as an example. However, it is possible to apply the present invention.

  The shape and structure of each member such as the contact member 2, the wedge members 3, 3 ', and the support bar 12 are not limited to the above embodiments.

  For example, in the embodiment shown in FIG. 15, the wedge member 5 has a screw portion 52 screwed to the support bar 12 ′ standing upright on the main body portion 51. Unlike the first embodiment, the support bar 12 'does not have the concave portion 125 into which the wedge member 3 (the contact member 2) is fitted. Therefore, in the present embodiment, the upper portion of the screwing portion 52 is inserted into the engaging portion 121a of the support bar 12 ', and the fixing member 9 such as a screw is inserted into the upper connection portion 123' of the support bar 12 'through the through hole 53. The wedge member 5 (contact member 2) is screwed. Also in this case, falling off of the ceiling plate 11 can be prevented as in the above embodiment.

  The main body 51 of the wedge member 5 has a substantially U-shape in cross section, and a space 54 having a partially open lower surface is formed therein. On the other hand, the contact member 4 has a substantially T-shape in cross section, and unlike the first embodiment, no space 23 is formed inside. In the present embodiment, these members 4 and 5 are connected by fitting the head 41 of the contact member 4 into the space 54 of the wedge member 5. Thus, the manner of connection between the contact member and the wedge member can be changed as appropriate.

  The wedge member 6 shown in FIG. 16 has a tapered fitting portion 62 formed at one end of a main body 61 instead of the bent portion 33 and the bent piece 34 of the first embodiment. Further, a space 64 in which a part of the lower surface of the main body 61 is opened is formed therein. On the other hand, the shape of the opening 126 of the concave portion 125 of the support bar 12 '' also has a tapered shape. Thus, the wedge member 6 does not fall out of the concave portion 125.

  Further, in the first embodiment, one groove 35 is provided in the bent piece of the wedge member 3, but a plurality of grooves may be provided. As shown by a two-dot chain line in FIG. 13, by providing a plurality of grooves in accordance with the depth of the concave portion 125 of the support bar 12, it is not necessary to prepare the wedge member 3 for each support bar 12 having a different shape. High versatility and good workability. Of course, it is also possible to provide a plurality of upper and lower pairs of grooves 35 and 39 (fixed portions 38) in the wedge member 3 'of the second embodiment, and the same applies to the other embodiments described above.

  In the second embodiment, only the wedge member 3 ′ is used. However, the wedge member 3, which has the same shape as the abutment members 2, 2 ′, and 4 of the above embodiments, is used as the grip member 8 for the operator to wedge. It may be used by being connected to the contact portion 36 of the member 3 '. In addition, the gripping member 8 does not need to be long like the contact member of the first embodiment.

  INDUSTRIAL APPLICATION This invention can be utilized as a ceiling board fall prevention apparatus which prevents the fall of a ceiling board in a system ceiling. In addition, the present invention is not limited to the system ceiling, and can be used as a fall prevention device for a ceiling base material having a ceiling structure including a ridge and a ridge holder, for example.

1: ceiling plate fall prevention device, 2, 2 ', 4: contact member, 2a: end, 3, 3', 5, 6: wedge member, 3a: one end, 3b: other end, 8: gripping member, 9: Screw, 10: System ceiling (ceiling structure), 11: Ceiling panel, 11a: Outdoor surface, 11b: Indoor surface, 12, 12 ': Support bar, 12A: First support bar, 12B: Second support Bar, 13: support bar receiving member (channel material), 13a: lower flange, 14: frame member, 14a: flat portion, 14b: fixed portion, 14c: connecting portion, 14d: projecting portion, 15: connecting member, 15a: Fixing device (bolt), 16: support member (steel beam), 21: head, 21a: lower surface, 22, 22 ': hanging portion, 22a: lower end, 23: space, 24: opening, 25: plate portion, 31: body part, 32: operation piece, 32a: reinforcing part, 33: bending part, 34: bending , 34a: projecting portion, 35: groove portion, 36: contact portion (main body portion), 37: extension portion, 38: fixing portion (fitting portion), 39: second groove portion, 41: head portion, 42: hanging down Part, 42a: lower end, 51: main body part, 52: screwed part, 53: through hole, 54: space, 61: main body part, 62: fitting part, 64: space, 121: upper surface part, 121a: engagement Part, 122: lower surface part, 122a: end part, 123: upper connection part, 124: lower connection part, 125: concave part, 126: opening, 126a: upper opening edge, 126b: lower opening edge, 127: bottom part, 128 : Projecting portion, L: lighting device, S1: outdoor, S2: indoor, X: orthogonal direction (arrangement direction), Y: longitudinal direction, Z: vertical direction

Claims (14)

A ceiling plate fall prevention device for preventing the ceiling plate from falling in a ceiling structure including a ceiling plate, a plurality of support bars for supporting the ceiling plate, and a support bar receiving member for connecting and fixing the plurality of support bars. So,
A contact member disposed in a direction intersecting with the support bar and having contact with an outdoor surface of the ceiling plate,
A ceiling plate drop prevention device, wherein an end of the contact member is fixed to the support bar. The contact member includes a wedge member at one end thereof, the one end of which is fitted into a recess formed in the support bar,
2. The ceiling plate drop according to claim 1, wherein the wedge member has an operation piece operated by an operator standing on the main body, and the operation piece is pressed to fit the one end into the recess. 3. Prevention device. The ceiling plate fall prevention device according to claim 2, wherein the wedge member is slidably attached to the contact member along a longitudinal direction thereof. The ceiling plate fall prevention device according to claim 2 or 3, wherein one end of the wedge member is a bent portion formed by folding an end of the main body. The ceiling plate fall prevention device according to claim 4, wherein a plurality of grooves are formed on the upper surface of the bent portion at appropriate intervals in a longitudinal direction of the contact member. The ceiling plate fall prevention device according to any one of claims 2 to 5, wherein the contact member has a hanging portion extending vertically from the head toward the indoor side. The ceiling plate fall prevention device according to claim 6, wherein a plate-like portion substantially parallel to the head is provided at a lower end of the hanging portion. The contact member includes a wedge member having one end fixed to the support bar at one end thereof,
The ceiling plate drop prevention device according to claim 1, wherein the wedge member has a screwed portion that is screwed to the support bar, and the screwed portion is erected on a main body portion. A ceiling plate fall prevention device for preventing the ceiling plate from falling in a ceiling structure including a ceiling plate, a plurality of support bars for supporting the ceiling plate, and a support bar receiving member for connecting and fixing the plurality of support bars. So,
An abutting portion that abuts on the outdoor surface of the ceiling plate, an extended portion continuously formed from the abutting portion, and a fixed portion provided at an end of the extended portion and fixed to the support bar. A fall prevention device for a ceiling plate having a wedge member provided with: The ceiling plate fall prevention device according to claim 9, wherein the fixing portion is a fitting portion that fits one end of the extension portion into a concave portion of the support bar, and maintains the horizontal state of the contact portion by the fitting. . The ceiling plate fall prevention device according to claim 10, wherein the fitting portion has a pair of groove portions on upper and lower surfaces thereof. The ceiling plate fall prevention device according to any one of claims 9 to 11, wherein the contact portion further includes a gripping member gripped by an operator. A ceiling structure comprising a ceiling plate, a plurality of support bars for supporting the ceiling plate, a support bar receiving member for connecting and fixing the plurality of support bars, and a ceiling plate fall prevention device for preventing the ceiling plate from falling. And
The ceiling plate fall prevention device is disposed in a direction intersecting the support bar, and has a contact member that contacts an outdoor surface of the ceiling plate,
An end of the contact member is fixed to the support bar,
A ceiling structure in which the ceiling plate is sandwiched between the contact member and the support bar. A ceiling structure comprising a ceiling plate, a plurality of support bars for supporting the ceiling plate, a support bar receiving member for connecting and fixing the plurality of support bars, and a ceiling plate fall prevention device for preventing the ceiling plate from falling. And
The ceiling plate fall prevention device includes a contact portion that contacts an outdoor surface of the ceiling plate, an extension portion that is formed continuously from the contact portion, and the support portion that is provided at an end of the extension portion. A wedge member having a fixing portion fixed to the bar,
The plurality of wedge members are fixed to the support bar at appropriate intervals,
A ceiling structure in which the ceiling plate is sandwiched between the abutting portion of each wedge member and the support bar.

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