Panel body upward movement restriction structure

Abstract

To prevent a panel body 1, which is fitted to a support rod 2 so as to be detachable by being vertically moved, from falling off the support rod 2 by moving upward due to earthquake or the like, in a reinforced state.SOLUTION: An upward movement restriction tool 14 fixed to a ceiling rail 5 with a screw is disposed at an upper edge part of a panel body 1, which is attached / detached to / from a support rod 2 by being vertically moved, so as to prevent the panel body 1 from falling off the support rod 2 by restricting upward movement of the panel body.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to the technical field of an upward movement restriction structure for a panel body such as a partition panel. [Background technology]

[0002] Currently, there are panel bodies used for partition panels, etc., that are attached to posts that are erected between the ceiling and floor. In this case, a configuration has been proposed in which mounting hardware is engaged with multiple locking holes provided in the vertical direction of the post, and the panel body is lowered with the mounting hardware engaged with the slits provided in the panel body, thereby engaging the panel body in a non-slip manner, thereby attaching and supporting the panel body to the post (see, for example, Patent Document 1). In this case, the panel body is simply attached to the mounting bracket from above, so it is expected that the panel body will be accidentally lifted up due to earthquake vibrations, causing it to lose its attachment to the mounting bracket and fall off.Therefore, a fall prevention bracket is used which is fixed with screws to the ceiling rail on the ceiling surface to restrict the upward movement of the panel body and prevent it from falling off. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6892304 Summary of the Invention [Problem to be solved by the invention]

[0004] However, although the conventional anti-fall-off device is effective in preventing the falling-off of one of two adjacent panel bodies on the left and right, it has problems such as needing to be attached after one panel body has been installed and before the other panel body is installed, and therefore cannot be easily attached to an existing panel body, and these are the issues that the present invention aims to solve. [Means for solving the problem]

[0005] The present invention was created in view of the above-mentioned circumstances and with the aim of solving these problems. The invention of claim 1 relates to a panel body that is attached to a support in a state where the upper edge of the panel body faces the visible surface of a ceiling rail provided on the ceiling surface by engaging slits on the back surface of the panel body with mounting hardware that is engaged with a plurality of locking holes drilled in the vertical direction on the visible surface of the support, and an upward movement restricting device is attached to the visible surface of the ceiling rail, facing the upper edge of the panel body, and restricts the upward movement of the panel body when the slit comes out of the mounting hardware. In this configuration, the upward movement restricting device restricts upward movement of the upper edge portions of the adjacent edge portions of the adjacent panel bodies that face each other on the left and right sides, and one of the adjacent panel bodies is provided with a fall-off prevention device for restricting upward movement of the upper edge portion of the adjacent edge portion, while the other panel body is not provided with a fall-off prevention device for restricting upward movement of the upper edge portion of the adjacent edge portion, and the upward movement restricting device is provided between the fall-off prevention piece portion of the fall-off prevention device arranged on the upper edge portion of one panel body and the upper edge portion of the other panel body. The structure for restricting upward movement of a panel body is characterized by the above. The invention of claim 2 is as follows: The fall prevention device and upward movement restriction device are attached to the legs of the ceiling rail with screws. 2. The structure for restricting upward movement of a panel body according to claim 1. The invention of claim 3 is as follows: The support post has a support bracket fitted into its upper end so that it can be adjusted up and down freely, and the upper edge of the support bracket fitted into the ceiling rail is fastened to the straddling part of the ceiling rail with a screw, forming a body-side member. The screw for attaching the upward movement restrictor to the leg part of the ceiling rail is also screwed into the visible surface of the support bracket. 3. The structure for restricting upward movement of a panel body according to claim 1 or 2. The invention of claim 4 is as follows: In a panel body that is attached to a support with its upper edge facing the visible surface of a ceiling rail provided on the ceiling surface by engaging slits on the back surface of the panel body with mounting hardware that is engaged with a plurality of locking holes drilled in the vertical direction on the visible surface of the support, an upward movement restricting device that faces the upper edge of the panel body and restricts the upward movement of the panel body when the slit comes out of the mounting hardware is attached to the visible surface of the ceiling rail, The upward movement restricting device is made of a hard or semi-hard rubber elastic material. Characterized by This is a structure for restricting upward movement of the panel body. The invention of claim 5 is as follows: In a panel body that is attached to a support with its upper edge facing the visible surface of a ceiling rail provided on the ceiling surface by engaging slits on the back surface of the panel body with mounting hardware that is engaged with a plurality of locking holes drilled in the vertical direction on the visible surface of the support, an upward movement restricting device that faces the upper edge of the panel body and restricts the upward movement of the panel body when the slit comes out of the mounting hardware is attached to the visible surface of the ceiling rail, A fall prevention device is provided which has a fall prevention piece that abuts against the upper edge of the panel body to prevent the panel body from falling off the support, and the upward movement restricting device is arranged to abut against the upper side of the fall prevention piece and cooperates with the fall prevention device to restrict the upward movement of the panel body. Characterized by This is a structure for restricting upward movement of the panel body. [Effects of the Invention]

[0006] By using the invention of claim 1, it is possible to easily prevent the panel body from accidentally moving upward due to earthquake shaking or the like and falling off the support by simply using an upward movement restricting device installed on the visible surface of the ceiling rail, even for an already installed panel body, thereby improving workability. Moreover,The upward movement restricting tool is provided across the upper edge parts of the panel bodies provided adjacently on the left and right, and one upward movement restricting tool restricts the upward movement of both panel bodies, eliminating the need to prepare two, and simplifying the structure. Furthermore, the upward movement restriction device is provided in such a manner that it extends not only to the panel body where the fall prevention function of the fall prevention device works, but also to the upper edge of the panel body adjacent to the panel body where the fall prevention function of the fall prevention device does not work, so that the cooperative upward movement restriction of the panel body by the fall prevention device and the upward movement restriction device is also exerted on the other panel body, thereby reinforcing the upward movement restriction of the adjacent panel body. By adopting the invention of claim 4, It is now possible to easily prevent the panel body from accidentally moving upward due to earthquake shaking or the like and falling off the support column by simply using an upward movement restricting device installed on the visible surface of the ceiling rail, even for an already installed panel body, thereby improving workability. Moreover, Since the upward movement restricting device is made of a hard or semi-hard rubber elastic material, when the panel body is suddenly moved upward due to an earthquake, the upward movement is restricted by the rubber elasticity of the hard or semi-hard rubber elastic material, and the upward movement can be restricted while mitigating the impact on the panel body. By adopting the invention of claim 5, It is now possible to easily prevent the panel body from accidentally moving upward due to earthquake shaking or the like and falling off the support column by simply using an upward movement restricting device installed on the visible surface of the ceiling rail, even for an already installed panel body, thereby improving workability. Moreover, In a device provided with a fall prevention device having a fall prevention piece portion for preventing the panel body from falling off from the support, an upward movement restricting device is arranged to abut on the upper side of the fall prevention piece portion and cooperates with the fall prevention device to restrict the upward movement of the panel body, thereby making the restriction of the upward movement of the panel body more reinforced and reliable. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] 1A and 1B are a longitudinal cross-sectional view and a side view of the main part of the partition panel as seen from the free end side. [Figure 6] 10A, 10B, and 10C are perspective views of the main parts of the upper end of the panel body where the second, first, and third fall-off prevention devices are attached. [Figure 7] 10(A), (B), and (C) are explanatory views showing the procedure for attaching the first fall-off prevention device. [Figure 8]10(A) and 10(B) are explanatory views showing the procedure for attaching the second fall-off prevention device. [Figure 9] (A) (B) (C) (D) are a front view, a plan view, a side view, and a perspective view of the first fall-off prevention device. [Figure 10] (A)(B)(C)(D) are a front view, a plan view, a side view, and a perspective view of the second fall-off prevention device. [Figure 11] (A)(B) is a front view and a perspective view of the third fall-off prevention device, and (C)(D)(E) is a front view, a side view and a perspective view of the upward movement restriction device. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 denotes a partition panel, 2 denotes a support post for attaching said panel 1, and said support post 2 has its lower end attached to a floor rail 3 provided on floor surface F. Support bracket 4 is fitted into the upper end of support post 2 so that it can be adjusted up and down. The upper end of support bracket 4 is fitted into leg piece 5b of U-shaped ceiling rail 5 provided on ceiling surface C, and tongue piece 4a provided on the upper edge of support bracket 4 is fastened to straddling piece 5a, which forms the visible surface of ceiling rail 5, with screws 4b. With this configuration, support post 2 including support bracket 4 functions as a frame-side member attached to the frame together with floor rail 3 and ceiling rail 4. On both the left and right sides of the visible surface (front and back surfaces) 2a of the support 2, locking holes (slits) 2b are drilled at appropriate intervals in the vertical direction, and one piece 6a of a roughly H-shaped mounting bracket 6 is fitted into the support 2, while the other piece 6b protrudes from the front and back surfaces of the support 2, and the mounting bracket 6 is assembled to the support 2 in such a manner that the lower edge of the neck-shaped body 6c is locked onto the lower edge of the locking hole 2b.

[0009] Meanwhile, slits (locking holes) 1a corresponding to the locking holes 2b are provided on the rear surface of the panel at both left and right ends of the panel body 1. Then, by lifting the panel body 1 slightly above the mounting position and fitting it into the other piece 6b of the mounting bracket 6, and then lowering it, the other piece 6b fits into the panel body 1, and the upper edge of the body part 6c becomes locked into the upper end of the slit 1a, and the panel body 1 is attached to the support 2 with its upper and lower ends overlapping the ceiling rail 5 and the floor rail 3.

[0010] Reference numerals 7 and 8 denote first and second fall prevention devices for preventing the attached panel body 1 from falling off. The first fall prevention device 7 prevents the edge of one panel body 1 from moving upward when the panel bodies 1 are adjacent to each other on the left and right, thereby preventing the one panel body 1 from falling off. Ingredients 8 The purpose of this is to restrict the upward movement of the free end edge of the panel body 1, which is the free end, and to prevent the panel body 1 from falling off.

[0011] The first fall prevention device 7 is composed of a vertical plate-shaped sight piece 7a that is long in the left-right direction, a fall prevention piece 7b that is bent into a horizontal plate shape (inverted L-shape) from the upper edge of one half of the left-right half (tip) of the sight piece 7a, and a hanging piece 7c that hangs down and extends downward from the other left-right end (base end) of the sight piece 7a, and in a structure in which left and right panel bodies 1 are attached adjacent to a support 2, the first fall prevention device 7 is attached to one panel body 1 that has been attached to the support 2 first, at a stage before the other panel body 1 is attached to the support 2, thereby preventing the one panel body 1 from falling off.

[0012] In this case, the first anti-fall-off device 7 first has its sight piece portion 7a facing the sight surface 2a of the support 2, and the tip portion where the anti-fall-off piece portion 7b is formed is inserted between the leg piece portion 5b of the ceiling rail 5 and the back surface of the panel body 1, and then the anti-fall-off piece portion 7b comes into contact with the upper edge portion 1b of the adjacent side edge portion of the panel body 1 that was previously installed, and then the hanging piece portion 7c is bent to form a bent piece portion 7d, and the edge of this bent piece portion 7d is set in a state where it is in contact with the edge of the sight surface 4c of the support bracket 4 (or the bent surface 4d if the bent surface 4d is on that side). Next, the portion of the visible piece 7a that is exposed from the panel body 1 is fixed to the ceiling rail 5 via a screw 7e, and the first anti-fall-off device 7 is fixed to the ceiling rail 5, which is a member on the main body side.By configuring it in this way, when the panel body 1 that has been attached to the support 2 in advance attempts to move upward due to vertical shaking caused by an earthquake, the upward movement of the adjacent side edge of the panel body 1 is restricted by the anti-fall-off piece 7b, thereby preventing the panel body 1 that has been attached in advance from falling off.

[0013] In this way, after the first anti-fall-off device 7 is attached to the ceiling rail 5 to prevent the previously installed panel body 1 from falling off, an adjacent panel body 1 is subsequently attached to the same support pillar sight surface 2a, so that the adjacent panel bodies 1 are attached in a continuous left-right direction via the support pillar 2, and most of the exposed part of the sight piece 7a from the previously installed panel body 1, including the screws 7e used to attach and fix the first anti-fall-off device 7, is covered by the subsequently installed panel body 1, so that only the gap between adjacent panels 1 can be seen.

[0014] In contrast, the second anti-fall-off device 8 restricts the upward movement of the free end edge of the panel body 1 which is attached to the support 2, which serves as the free end when there is no body side component such as a wall W, thereby preventing the panel body 1 from falling off.It is configured with a projecting piece 8a which abuts the upper edge of the projecting surface 2d of the support 2, a visible piece 8b which is bent from both end edges in the projecting direction (front-to-back direction) of the projecting piece 8a to form the leg piece of the second anti-fall-off device 8, and a fall-off prevention piece 8c which is bent from the upper edge of the visible piece 8b outward in the front-to-back direction and abuts against the upper edge 1b of the panel body 1, thereby restricting the upward movement of the panel body 1 in the direction in which the slit 1a comes out of the mounting bracket 6, thereby preventing the panel body 1 from falling off the support 2.

[0015] In this case, the second captive device 8 has a visible piece 8b formed in an inverted L shape by a vertical piece 8d and an upper piece 8e, and a captive piece 8c bent and formed at the upper edge of the front half of the upper piece 8e, and is attached to the support 2 which serves as the free end of the panel body 1. In this case, the upper edge of the front half of the upper piece 8e is inserted between the panel body 1 and the leg piece 5b of the ceiling rail 5, and the captive piece 8c is set so that it abuts the upper edge 1b of the edge of the free end of the panel body 1. In this set state, the visible piece 8a is attached and fixed to the visible surface 2d which serves as the free end of the support 2 with a screw 10, allowing the second captive device 8 to be attached to the support 2.

[0016] The support 2, which becomes the free end in this way, has the half of the front, visible surface 2a, on the side where the panel body 1 is assembled, covered by the panel body 1, but the free end half of the visible surface 2a and the visible surface 2d are exposed, along with the visible piece 8a of the second anti-fall-off device 8 and the visible piece 8b of the part not covered by the panel body 1.Therefore, in this embodiment, a corner post 11 which is U-shaped in plan view and whose upper edge reaches the ceiling surface C is attached to cover the exposed part, and the tip (free end) of the ceiling rail 5 is also covered with a cover material 5c, thereby improving the design.

[0017] In addition, in this embodiment, a third anti-fall device 12 is used to regulate the upward movement of the free end edge of the panel body 1 attached to the support 2 at the part close to the wall W (wall edge part), thereby preventing the panel body 1 from falling off. This third anti-fall-off device 12 is L-shaped and includes an anti-fall-off piece portion 12a that abuts against the upper edge portion 1b of the free end edge portion of the panel body 1 when the panel body 1 is attached to the support 2, and a fixed piece portion 12b that is bent upward from the anti-fall-off piece portion 12a and fixed to the leg piece portion 5b of the ceiling rail 5 via a screw 12c. In this case, the third fall prevention device 12 prevents the panel body 1 attached to the support 2 from falling off due to upward movement, and the part of the support 2 on the wall W side is fitted into a wall rail 13 which is U-shaped in plan view and is configured to close the gap between the panel body 1 and the wall W.

[0018] In this manner, in this embodiment, first, second and third fall prevention devices 7, 8 and 12 are provided, which are formed with fall prevention piece portions 7b, 8c and 12a that abut against the upper edge portion 1b of the panel body 1 to restrict the upward movement of the panel body 1 and prevent the panel body 1 from falling off the support 2. By providing the first, second and third fall prevention devices 7, 8 and 12 in this manner, when the panel bodies 1 are arranged adjacent to each other on the left and right, one end side is restricted from moving upward by the first fall prevention device 7, but the other end side is not directly affected by the upward movement restriction action of the first fall prevention device 7. In contrast, for the panel body 1 that is the free end, the upper edge 1b of the edge portion on the free end side is restricted from moving upward by the second anti-fall device 8, and like the adjacent panel body 1, the panel body 1 is restricted from moving upward at one end that is the free end, but is not restricted from moving upward at the other end adjacent to the panel body.On the other hand, for the panel body 1 near the wall W, where the free end side edge is prevented from falling by the third anti-fall device 12, the edge portion on the side adjacent to the panel body 1 is restricted from moving upward by the first anti-fall device 7. Therefore, in order to further ensure that such various panel bodies 1 do not fall off, an upward movement restriction device 14 is provided which cooperates with the first, second and third fall prevention devices 7, 8 and 12 to restrict the upward movement of the panel body 1.

[0019] The upward movement restricting device 14 is made of a hard or semi-hard rubber elastic material and is formed in the shape of a rectangular pillar that is elongated in the left-right direction, with a screw hole 14a drilled in the left-right center. The upward movement restricting devices 14 provided in correspondence with the second and third fall prevention devices 8, 12 are arranged in a stacked state on the upper surfaces of the fall prevention pieces 8c, 12a that abut against the upper edge 1b of the edge of the panel body 1, which is the free end, and are attached and supported on the frame side by screwing a screw 14b that passes through a screw hole 14a located above the support 2 into the leg piece 5b of the ceiling rail 5. In this case, the screw 14b is screwed into the leg piece 5b of the ceiling rail 5 as well as into the visible surface 4c of the support bracket 4 that constitutes the support 2, thereby providing reinforcement. and are separate from the screws 7e used to attach the first fall-off prevention device 7. There are. The upward movement restriction device 14 attached in this manner is configured to cooperate with the anti-fall-off piece portions 8c, 12a of the second and third anti-fall-off devices 8, 12 to restrict the upward movement of the panel body 1, thereby reinforcing the function of preventing the panel body 1 from falling off the support 2.

[0020] In contrast, the upward movement control device 14 provided in correspondence with the first anti-fall-off device 7 for preventing the fall-off of one of the adjacent panel bodies 1 on the left and right is arranged so that half of it on the first anti-fall-off device 7 side is in contact with and stacked on the upper surface of the anti-fall-off piece portion 7b formed on the first anti-fall-off device 7, and the opposite half is arranged in close proximity to the upper edge portion 1b of the panel body 1 on which the other anti-fall-off device 7 is not provided (designally spaced apart by the thickness of the anti-fall-off piece portion 7b). As a result, the first anti-fall-off device 7 and the upward movement control device 14 can work together to control the upward movement of one panel body 1 at the edge portion adjacent to the other panel body 1 of one panel body 1 that is prevented from falling off, and the upward movement control function of the upward movement control device 14, which has the upward movement control function of the fall-off control device added on the one panel body 1 side, is also exerted at the upper edge portion 1b of the edge portion adjacent to the one panel body 1 of the other panel body 1 on the side where the first anti-fall-off device 7 is not provided, so that a reinforced upward movement control function equivalent to that of the panel body 1 on the side where the first anti-fall-off device 7 is provided is exerted.

[0021] In the present embodiment configured as described above, the panel body detachably attached to the support column 2 via the mounting bracket 6 can be prevented from accidentally moving upward due to earthquake shaking or the like and falling off the support column 2 by the upward movement restrictor 14 attached via a screw 14b to the leg piece 5b that forms the visible surface of the ceiling rail 5. Furthermore, since the upward movement restrictor 14 can be simply fixed to the ceiling rail 5 with a screw, even if the panel body 1 is already installed, it can be easily installed in its existing state, thereby improving workability. In this case, since the upward movement restricting device 14 is formed from a hard or semi-hard rubber elastic material, when the panel body 1 moves suddenly upward due to an earthquake, the upward movement is restricted by the rubber elasticity of the hard or semi-hard rubber elastic material, which has the advantage of being able to restrict the upward movement while mitigating the impact on the panel body 1.

[0022] Furthermore, in this case, when the panel body 1 is attached to the left and right adjacent support 2, the upward movement restricting device 14 is provided across the upper edge portions 1b of the adjacent side edge portions of both the left and right adjacent panel bodies 1, so that the upward movement of both adjacent panel bodies 1 can be restricted by a single upward movement restricting device 14, allowing the same component to be used for both purposes and achieving a reduction in the number of parts.

[0023] Furthermore, in this device, in order to prevent the panel body 1 from falling off from the support 2, first, second and third fall prevention devices 7, 8 and 12 each having fall prevention piece portions 7b, 8c and 12a are provided, and the upward movement restriction device 14 is arranged so as to abut the upper side of the fall prevention piece portions 7b, 8c and 12a. As a result, the upward movement of the panel body is restricted in cooperation with the corresponding first, second and third fall prevention devices 7, 8 and 12, making the restriction of the upward movement of the panel body more reinforced and reliable.

[0024] Furthermore, in this case, when the panel bodies 1 are attached adjacent to each other on the left and right sides, the first anti-fall-off device 7 is provided at the adjacent edge portions of the panel bodies 1 to regulate upward movement of the upper edge portion 1b of one of the adjacent panel bodies 1, but is not provided at the adjacent edge portion of the other panel body 1. In this case, the upward movement restricting device 14 is provided across the anti-fall-off piece portion 7c of the first anti-fall-off device 7 arranged at the upper edge portion 1b of the adjacent edge portion of one panel body 1, and the upper edge portion 1b of the adjacent edge portion of the other panel body 1 on which the first anti-fall-off device 7 is not provided. As a result, the cooperative upward movement restricting function of the upward movement restricting device 14 and the first anti-fall-off device 7 is exerted not only on the side of one panel body 1 but also on the other panel body 1, thereby reinforcing the upward movement restriction on the adjacent panel bodies 1. [Industrial Applicability]

[0025] The present invention can be used as a structure for restricting the upward movement of a panel body such as a partition panel. [Explanation of symbols]

[0026] 1 Panel body 1a Slit 1b Top edge 2 pillars 2b Locking hole 5 Ceiling rail 5b Leg piece 8 Second fall prevention device 8a Projection part 8b Spot piece 8c Shedding Prevention Panel 12 Third anti-fall-off device 12a Shedding prevention sheet 14 Upper moving regulation tool

Claims

1. A panel body is attached to a support pillar with its upper edge facing the visible surface of a ceiling rail provided on the ceiling surface by engaging a slit provided on the back surface of the panel body with a mounting bracket that is engaged with a plurality of engaging holes drilled in the vertical direction on the visible surface of the support pillar, In a configuration in which an upward movement restricting device is attached to the visible surface of the ceiling rail, the upward movement restricting device faces the upper edge of the panel body and restricts the upward movement of the panel body when the slit is out of the mounting bracket, The upward movement restricting device restricts upward movement of the upper edge portions of the adjacent edge portions of the panel bodies adjacent to each other on the left and right sides, One of the adjacent panel bodies is provided with a fall-off prevention device for restricting upward movement of the upper edge portion on the adjacent edge side, and the other panel body is not provided with a fall-off prevention device for restricting upward movement of the upper edge portion on the adjacent edge side, An upward movement restriction structure for a panel body, characterized in that the upward movement restriction device is arranged between the fall prevention piece portion of the fall prevention device arranged at the upper edge portion of one panel body and the upper edge portion of the other panel body.

2. An upward movement restriction structure for a panel body as described in claim 1, characterized in that the fall prevention device and the upward movement restriction device are each separately attached with screws to the leg portion of the ceiling rail.

3. The support post is configured as a body side member by fitting a support bracket into the upper end so that it can be adjusted and moved freely in the up and down direction, and fastening the upper edge of the support bracket that is fitted into the ceiling rail to the straddling part of the ceiling rail with a screw, 3. The structure for restricting upward movement in a panel body according to claim 1, wherein the screw for attaching the restricting device to the leg portion of the ceiling rail is also threaded into the mounting surface of the support bracket.

4. A panel body that is attached to a support in a state where the upper edge of the panel body faces the visible surface of a ceiling rail provided on the ceiling surface by engaging a slit provided on the back surface of the panel body with a mounting bracket that is engaged with a plurality of engaging holes drilled in the vertical direction on the visible surface of the support, In a configuration in which an upward movement restricting device is attached to the visible surface of the ceiling rail, the upward movement restricting device faces the upper edge of the panel body and restricts the upward movement of the panel body when the slit is out of the mounting bracket, The upward movement restricting structure for a panel body is characterized in that the upward movement restricting device is made of a hard or semi-hard rubber-like elastic material.

5. A panel body that is attached to a support in a state where the upper edge of the panel body faces the visible surface of a ceiling rail provided on the ceiling surface by engaging a slit provided on the back surface of the panel body with a mounting bracket that is engaged with a plurality of engaging holes drilled in the vertical direction on the visible surface of the support, In a configuration in which an upward movement restricting device is attached to the visible surface of the ceiling rail, the upward movement restricting device faces the upper edge of the panel body and restricts the upward movement of the panel body when the slit is out of the mounting bracket, a fall prevention device is provided, the fall prevention device having a fall prevention piece that abuts against the upper edge of the panel body to prevent the panel body from falling off the support; The upward movement restricting structure for a panel body is characterized in that the upward movement restricting device is arranged to abut against the upper side of the fall-off prevention piece portion and cooperates with the fall-off prevention device to restrict the upward movement of the panel body.

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