Ceiling-mounted equipment base structure and ceiling-mounted equipment base members

The elastically deformable perimeter structure for ceiling-embedded equipment addresses the issue of member collisions by allowing sliding connections, effectively preventing damage and maintaining stability during earthquakes.

JP7880614B2Active Publication Date: 2026-06-26CHIKAMI MIRUTETABUKU

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
CHIKAMI MIRUTETABUKU
Filing Date
2022-08-31
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing ceiling structures with seismic-resistant features suffer from damage due to individual members colliding with each other during vibrations, such as earthquakes, leading to potential human casualties and equipment detachment.

Method used

A perimeter structure for ceiling-embedded equipment comprising elastically deformable horizontally positioned members that slide relative to each other, connected via grooves and joints, allowing them to absorb vibrations and prevent collisions.

Benefits of technology

Prevents damage to ceiling and equipment by absorbing vibrations, reducing the risk of collisions between structural components and maintaining stability during seismic events.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a ceiling cornice structure of a ceiling embedded facility and a ceiling cornice member of a ceiling embedded facility which can prevent damage of a ceiling and a facility device arranged in the ceiling.SOLUTION: In a ceiling cornice structure 1 of a ceiling embedded facility, any one of a first ceiling cornice member 10 and a second ceiling cornice member 20 has two members 31 and 32 which include a member 31a arranged in a horizontal direction and are arranged in the horizontal direction, the other has one member 12 which is arranged in the horizontal direction so that upper and lower surfaces are sandwiched between the two members with almost no gap at approximately the same height as the lower surface of a ceiling member 300, and the two members 31 and 32 arranged in the horizontal direction and the one member 12 are slidable with respect to each other in a direction such that a side wall surface 201 and an opening peripheral edge part 301 approach / are separated from each other.SELECTED DRAWING: Figure 5
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Description

Technical Field

[0001] The present invention relates to a peripheral edge structure of ceiling-embedded equipment and a peripheral edge member of ceiling-embedded equipment, and particularly relates to a peripheral edge structure of ceiling-embedded equipment and a peripheral edge member of ceiling-embedded equipment that can prevent damage to equipment suspended from the ceiling.

Background Art

[0002] Conventionally, there is a peripheral edge structure of ceiling-embedded equipment (also simply referred to as "ceiling structure") in which ceiling equipment such as air conditioners is provided on the ceiling of a building. In Japan where earthquakes occur frequently, if a part of the ceiling structure collapses due to an earthquake, human casualties will occur to the occupants. Therefore, ceiling structures having various seismic-resistant structures have been used.

[0003] For example, Patent Document 1 discloses a ceiling structure including a building structure with improved seismic resistance. The ceiling structure has a plurality of frame members suspended and supported by ceiling support bolts, a ceiling board supported by the frame members, an air conditioner suspended and supported by an air conditioner support bolt, etc. The assembly of the plurality of frame members and the ceiling board and the air conditioner etc. are indirectly connected by a connecting member. When, for example, a lateral sway occurs in the air conditioner due to an earthquake or the like, the lateral sway of the air conditioner will be synchronized with the lateral sway of the frame members and the ceiling board, and damage and detachment caused by the collision between the air conditioner and the frame members and the ceiling board are suppressed. Therefore, the seismic resistance of the ceiling structure is improved.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, in Patent Document 1, the connecting member is fixed to the air conditioning support bolts and also to the frame member. Specifically, the connecting member has a first fixing part and a second fixing part, the first fixing part is fixed to the air conditioning support bolt and the second fixing part is fixed to the frame member. In this way, the assembly of multiple frame members and ceiling panels and the air conditioner, etc. are rigidly connected indirectly by the connecting member. Therefore, when vibration occurs in the ceiling structure, each member vibrates and collides with each other with individual amplitudes and periods, which is a cause of damage.

[0006] Therefore, the present invention aims to provide a baseboard structure for ceiling-embedded equipment and a baseboard member for ceiling-embedded equipment that can prevent damage to the ceiling and equipment and other items arranged on the ceiling. [Means for solving the problem]

[0007] The present invention relates to a perimeter structure for ceiling-embedded equipment that is suspended and fixed in the space above the ceiling with its lower surface exposed through an opening in the ceiling, and the side wall surface of the outer casing of the ceiling-embedded equipment and parallel The opening edges of the ceiling members are positioned at a predetermined distance from each other, and the vertically positioned members and the tip of the opening Peripheral end A first perimeter member having a member positioned horizontally opposite to the first perimeter member, the vertically positioned member being directly fixed along the side wall surface, and the opening Peripheral end The first and second perimeter members are provided and have a horizontally positioned member, and one of them has two horizontally positioned members, including the horizontally positioned member, and the other has one horizontally positioned member at approximately the same height as the lower surface of the ceiling member, with its upper and lower surfaces sandwiched between each of the two members with virtually no gap, and the two horizontally positioned members and the one horizontally positioned member are located between the side wall surface and the opening Peripheral end They are made capable of sliding against each other in directions that move them closer together or further apart. The length of the horizontally positioned first and second trim members is shorter than the predetermined distance, and the horizontally positioned member of the first trim member is composed of a plate-shaped member extending along the horizontal direction and a tip portion provided on the tip side of the plate-shaped member and folded upward, and a groove extending horizontally is formed at the lower end of the vertically positioned member of the first trim member and at the folded tip portion, and the first trim members can be connected to each other in the horizontal direction by fitting a joint into the groove. It is characterized by the following:

[0008] In the ceiling-mounted equipment perimeter structure according to the present invention, the two horizontally arranged members may be formed to be elastically deformable so that one opens and closes vertically relative to the other.

[0009] In the ceiling-embedded equipment perimeter structure according to the present invention, the two members arranged in the horizontal direction may be configured such that the vertical separation distance is smaller on the side of one member.

[0011] The present invention relates to a trim member for a ceiling-embedded device that is suspended and fixed in the space above the ceiling with its lower surface exposed through an opening in the ceiling, and the trim member is attached to the side wall surface of the outer casing of the ceiling-embedded device and parallel The opening edges of the ceiling members are positioned at a predetermined distance from each other, and the vertically positioned members and the tip of the opening Peripheral end A first perimeter member having a member positioned horizontally opposite to the first perimeter member, the vertically positioned member being directly fixed along the side wall surface, and the opening Peripheral end The first and second perimeter members are provided and have a horizontally positioned member, and one of them has two horizontally positioned members, including the horizontally positioned member, and the other has one horizontally positioned member at approximately the same height as the lower surface of the ceiling member, with its upper and lower surfaces sandwiched between each of the two members with virtually no gap, and the two horizontally positioned members and the one horizontally positioned member are located between the side wall surface and the opening Peripheral end It is used in the perimeter structure of ceiling-embedded equipment, characterized by the fact that the elements are slidable toward and away from each other. The length of the horizontally positioned first and second trim members is shorter than the predetermined distance, and the horizontally positioned member of the first trim member is composed of a plate-shaped member extending horizontally and a tip portion provided on the tip side of the plate-shaped member and folded upward, and the lower end of the vertically positioned member of the first trim member and the folded tip portion each have grooves extending horizontally, and the first trim members can be connected to each other in the horizontal direction by fitting a joint into the grooves. It is characterized by being used as the first and second molding members. [Effects of the Invention]

[0012] According to the present invention, damage to the ceiling and equipment and other items placed on the ceiling can be prevented. [Brief explanation of the drawing]

[0013] [Figure 1] It is a schematic diagram of a ceiling structure including a peripheral edge structure of ceiling-embedded equipment according to an embodiment of the present invention. [Figure 2] It is a schematic perspective view of a first peripheral edge member according to an embodiment of the present invention. [Figure 3] It is a schematic perspective view of a second peripheral edge member according to an embodiment of the present invention. [Figure 4] It is a schematic perspective view of a second peripheral edge member according to a modified example of an embodiment of the present invention. [Figure 5] It is a diagram showing a state in which a ceiling member and equipment are attached to a peripheral edge structure of ceiling-embedded equipment according to an embodiment of the present invention without vibration acting on the peripheral edge structure. [Figure 6] It is a diagram showing a first state of a peripheral edge structure of ceiling-embedded equipment according to an embodiment of the present invention. [Figure 7] It is a diagram showing a second state of a peripheral edge structure of ceiling-embedded equipment according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0014] First, the peripheral edge structure of ceiling-embedded equipment and the peripheral edge member of ceiling-embedded equipment according to an embodiment of the present invention will be described. For common components, common reference numerals will be given in the drawings and described. Needless to say, the present invention is not limited to the following examples and can be arbitrarily changed without departing from the gist of the present invention.

[0015] FIG. 1 is a schematic view of a ceiling structure including a peripheral edge structure of ceiling-embedded equipment and a peripheral edge member of the ceiling-embedded equipment according to an embodiment. The ceiling structure 100 includes a ceiling back (structural body) 101, a suspension bolt 102 suspended from the ceiling back 101, a ceiling-embedded equipment 200 and a ceiling member 300 connected to the suspension bolt 102, and a peripheral edge structure 1 of the ceiling-embedded equipment that horizontally connects the ceiling-embedded equipment 200 and the ceiling member 300 (hereinafter simply referred to as "peripheral edge structure 1"). The ceiling-embedded equipment 200 is suspended and fixed to the ceiling back 101 by a suspension bolt 102 with its lower surface exposed in an opening 100a provided in the ceiling.

[0016] A side wall surface 201 of an outer casing of the ceiling-embedded equipment 200 and an opening peripheral end portion 301 of the ceiling member 300 arranged horizontally are arranged with a predetermined distance therebetween, and the peripheral edge structure 1 is provided so as to mediate between the ceiling member 300 and the ceiling-embedded equipment 200. The ceiling member 300, the peripheral edge structure 1, and the ceiling-embedded equipment 200 are arranged in this order along the horizontal direction. A set of the peripheral edge structures 1 is provided on both sides of the ceiling-embedded equipment 200, and can absorb more vibration compared to the case where it is provided only on one side. The detailed mechanism of vibration absorption will be described later. The total length (dimension in the horizontal direction) of the peripheral edge structure 1 can be arbitrarily set according to the separation distance between the side wall surface 201 and the opening peripheral end portion 301. Although FIG. 1 illustrates the case where the peripheral edge structure 1 is provided along the left-right direction of the paper surface, the edge structure 1 is also provided in the depth direction of the paper surface although not shown. That is, the peripheral edge structure 1 is arranged so as to surround the ceiling-embedded equipment 200 from four directions.

[0017] The ceiling structure 100 is provided, for example, in a building such as a commercial facility or an office building. One end of the suspension bolt 102 is fixed to the ceiling back 101 and the other end is fixed to the ceiling member 300 or the ceiling-embedded equipment 200. The ceiling-embedded equipment 200 is, for example, equipment such as air conditioning.

[0018] The cornice structure 1 is composed of a first cornice member 10 and a second cornice member 20. Specifically, the first cornice member 10 and the second cornice member 20 are assembled facing each other, with the first cornice member 10 attached to the ceiling embedded equipment 200 or its fixing parts, and the second cornice member 20 attached to the ceiling member 300. When an earthquake occurs, the first cornice member 10 and the second cornice member 20 move relative to each other, with one moving closer to the other and the other moving further away. In other words, for example, if a ceiling-embedded equipment 200 suspended from the ceiling space 101 shakes horizontally due to an earthquake or the like, the first cornice member 10 and the second cornice member 20 will be displaced horizontally relative to the other, as one horizontally positioned member (insertion part) on one side is inserted between two horizontally positioned members (inserted part) on the other side. The ceiling member 300 may be suspended from the ceiling space 101, or it may be directly fixed to the wall of the building or the like without being suspended from the ceiling space 101.

[0019] Figure 2 is a schematic perspective view of the first perimeter member 10. The first perimeter member 10 has an L-shaped cross-section and is composed of a fixed portion 11 extending vertically and an insertion portion 12 extending horizontally. The fixed portion 11 is positioned vertically and is directly fixed along the side wall surface 201 of the ceiling embedded equipment 200. The insertion portion 12 is composed of a plate-shaped plate member 12a and a tip portion 12b provided at the tip of the plate-shaped member 12a and having a shape that is folded upward. The tip portion 12b is provided to facilitate insertion of the first perimeter member 10 into the second perimeter member 20 and is positioned horizontally opposite the opening perimeter end 301.

[0020] A projection 11a is provided on the lower side of the fixed portion 11, and a groove 11b extending horizontally is formed between the projection 11a and the plate-shaped member 12a. A groove 12c extending horizontally is formed at the tip portion 12b. The first perimeter members 10 can be connected to each other by fitting joints (not shown) into the grooves 11b and grooves 12c of multiple first perimeter members 10. That is, by fitting a single joint into the grooves 11b and grooves 12c of horizontally adjacent first perimeter members 10, the first perimeter members 10 can be connected to each other in the horizontal direction.

[0021] Figure 3 is a schematic perspective view of the second molding member 20. The second molding member 20 is provided at the opening periphery end 301 and consists of an extension portion 30, a connecting portion 40, and a mounting portion 50. The extension portion 30 extends toward the first molding member 10, and the mounting portion 50 is provided for the attachment of the ceiling member 300. The connecting portion 40 connects the extension portion 30 and the mounting portion 50. The extension portion 30 protrudes from the connecting portion 40 toward the first molding member 10, and the mounting portion 50 protrudes from the connecting portion 40 toward the ceiling member 300.

[0022] The extension portion (inserted portion) 30 is composed of a first extension member 31 and a second extension member 32, and is connected to the connecting portion 40 at its base end. The first extension member 31 and the second extension member 32 extend horizontally from the connecting portion 40 to one side, with the first extension member 31 positioned above the second extension member 32. The first extension member 31 is composed of a flat plate portion 31a formed in a flat plate shape and an inclined portion 31b provided on the tip side of the flat plate portion 31a and inclined upward. The second extension member 32 is formed in a flat plate shape. The inclined portion 31b is provided to facilitate insertion of the first perimeter member 10 into the second perimeter member 20.

[0023] The first extension member 31 and the second extension member 32 are arranged with a gap between them in the vertical direction, and the gap between them decreases towards the tip side (opposite the connecting portion 40). The first extension member 31 and the second extension member 32 may be in contact at the tip side. The first extension member 31 and the second extension member 32 are elastically deformable in directions that bring them closer together or further apart. Specifically, the first extension member 31 and the second extension member 32 are formed to be elastically deformable so that their tip sides open and close. A guide space 30a into which the insertion portion 12 is inserted is formed between the first extension member 31 and the second extension member 32. The horizontal length of the guide space 30a is approximately the same as the horizontal length of the insertion portion 12.

[0024] The mounting portion 50 is composed of a first projection 51 and a second projection 52, with the first projection 51 located above the second projection 52. Both the first projection 51 and the second projection 52 extend horizontally and are spaced apart in the vertical direction. The first projection 51, the second projection 52, and the connecting portion 40 form a recess 50a, and the ceiling member 300 is placed in the recess 50a.

[0025] The first perimeter member 10 and the second perimeter member 20 may each have two horizontally positioned members, one of which may include a horizontally positioned member, and the other may have one horizontally positioned member positioned at approximately the same height as the lower surface of the ceiling member 300, with its upper and lower surfaces sandwiched between the two members with virtually no gaps. The two horizontally positioned members and the one horizontally positioned member are slidable from each other in directions that bring the side wall surface 201 of the ceiling embedded equipment 200 and the opening peripheral end 301 of the ceiling member 300 closer to and further apart from each other.

[0026] Figure 4 is a schematic perspective view of the first trim member 60 according to a modified example. As shown in Figure 4, in this modified example, a fixed part 70 is provided instead of the fixed part 11 in the above embodiment, and since everything else is the same as in the above embodiment, the same reference numerals are used and a detailed explanation is omitted.

[0027] In the above embodiment, the fixed portion 11 is a part of the first perimeter member 10 having an L-shaped cross section, and is arranged vertically and directly fixed along the side wall surface 201 of the ceiling-embedded equipment 200. On the other hand, a flange portion is provided on the side wall surface 201 of the ceiling-embedded equipment 200, and it is also conceivable to fix the first perimeter member 60 to this flange portion. Therefore, in the modified first perimeter member 60, instead of the fixed portion 11, a fixed portion 70 is provided that is fixed to the flange portion of the ceiling-embedded equipment 200.

[0028] The fixed portion 70 is composed of a first protruding piece 71, a second protruding piece 72, and a connecting portion 73. Both the first protruding piece 71 and the second protruding piece 72 protrude horizontally on the side opposite to the insertion portion 12, with the first protruding piece 71 positioned above the second protruding piece 72. The connecting portion 73 extends vertically and connects the first protruding piece 71 and the second protruding piece 72. The first protruding piece 71, the second protruding piece 72, and the connecting portion 73 form a fitting recess 70a into which the ceiling-embedded equipment 200 is fitted.

[0029] Figure 5 is a perspective view showing the initial state of the molding structure 1. The initial state is a state in which no vibration acts on the molding structure 1, which is composed of the first molding member 10 and the second molding member 20. In this state, the first molding member 10 and the second molding member 20 are stationary in a paired state. In the initial state, the extension 30 and the insertion 12 are arranged so as to overlap in the vertical direction, with the tip portion 12b located in the central part of the guide space 30a in the horizontal direction. As the guide space 30a moves toward the first molding member 10, the gap narrows, and the insertion 12 is sandwiched between the first extension member 31 and the second extension member 32, which are biased toward each other by the elastic restoring force, thus maintaining a state in which the first molding member 10 is difficult to detach from the second molding member 20.

[0030] When vibration occurs in the molding structure 1, the extension portion 30 and the insertion portion 12 reciprocate in the horizontal direction. Therefore, the first molding member 10 and the second molding member 20 are connected in a loosely fitted state to ensure space for the insertion portion 12 to move within the guide space 30a, so that the first molding member 10 and the second molding member 20 can move in the horizontal direction to either the side wall surface 201 of the outer casing of the ceiling-embedded equipment 200 or the opening peripheral end portion 301 of the ceiling member 300.

[0031] Figure 6 is a side view showing the first state of the molding structure 1. The first state is a state in which, for example, vibration occurs in the horizontal direction (left-right direction and depth direction in the plane of Figure 6) to the molding structure 1, and a force acts in a direction that separates the first molding member 10 and the second molding member 20, resulting in a decrease in the overlapping portion of the first molding member 10 and the second molding member 20 compared to the initial state. As shown in Figure 6, the tip portion 12b is guided into the guide space 30a and moves towards the tip side of the extension portion 30 from the intermediate position, and the overall length of the molding structure 1 has increased compared to the initial state. The tip portion 12b may also be retracted to the position just before exiting the guide space 30a, i.e., towards the tip side of the extension portion 30.

[0032] Figure 7 is a side view showing the second state of the molding structure 1. The second state is a state in which, for example, vibration occurs in the horizontal direction (left-right direction and depth direction in the plane of Figure 7) of the molding structure 1, and a force acts in a direction that brings the first molding member 10 and the second molding member 20 closer together, resulting in an increased overlapping portion of the first molding member 10 and the second molding member 20 compared to the initial state. As shown in Figure 7, the tip portion 12b is guided into the guide space 30a and moves towards the base end from the intermediate position of the extension portion 30, and the overall length of the molding structure 1 is reduced compared to the initial state. Since the horizontal length of the guide space 30a is approximately the same as the horizontal length of the insertion portion 12, the entire insertion portion 12 is housed in the guide space 30a. The molding structure 1 may be displaced until the tip portion 12b reaches the connecting portion 40 and the inclined portion 31b rides on the projection 11a.

[0033] When vibration occurs, the molding structure 1 alternately repeats between a first state and a second state, using the initial state as a reference. Specifically, with the insertion part 12 inserted into the extension part 30, in response to vibrations occurring in the molding structure 1, either the first molding member 10 or the second molding member 20 is displaced by approximately the same distance horizontally relative to the other. The relative horizontal displacement of the first molding member 10 and the second molding member 20 changes depending on the magnitude of the vibration. In other words, depending on the magnitude of the vibration, the tip part 12b moves to one of the horizontal locations in the guide space 30a.

[0034] Thus, when vibrations such as those caused by an earthquake act on the cornice structure 1, which has a first cornice member 10 and a second cornice member 20 that are loosely connected, the insertion part 12 can move horizontally within the guide space 30a while inserted into the extension part 30. That is, because the first cornice member 10 and the second cornice member 20 are connected in a loosely connected state, when vibrations act on the cornice structure 1, the tip part 12b can reciprocate within the guide space 30a between the connecting part 40 and the inclined part 31b. Therefore, it is possible to prevent damage to a part of the cornice structure 1 due to collision between the first cornice member 10 and the second cornice member 20. Furthermore, because the cornice structure 1 is arranged to surround the ceiling embedded equipment 200 from four directions, each cornice structure 1 can independently take on different states (first state, second state) and displacement amounts. This makes it possible to efficiently protect the ceiling embedded equipment 200 from impacts such as earthquakes.

[0035] In the above embodiment, an insertion portion (extension portion 30) is formed on the second perimeter member 20, an insertion portion 12 is formed on the first perimeter member 10, and a part of the first perimeter member 10 is inserted into the second perimeter member 20 to constitute the perimeter structure 1. However, it is also possible for an insertion portion to be formed on the first perimeter member 10, an insertion portion 12 to be formed on the second perimeter member 20, and a part of the second perimeter member 20 to be inserted into the first perimeter member 10 to constitute the perimeter structure 1. That is, as long as either the first perimeter member 10 or the second perimeter member 20 can move relative to the other in the horizontal direction, it is sufficient that an insertion portion is formed on at least one of the first perimeter member 10 or the second perimeter member 20 and an insertion portion is formed on the other.

[0036] Alternatively, an insertion portion may be formed on both the first perimeter member 10 and the second perimeter member 20, and the perimeter structure 1 may be constructed by fitting the insertion portions together. That is, some of the members constituting the insertion portion may function as an insertion portion, and a fitting structure formed by the insertion portion formed on the first perimeter member 10 and the second perimeter member 20 and the insertion portion formed on the other may be configured such that either the first perimeter member 10 or the second perimeter member 20 is relatively movable in the horizontal direction relative to the other.

[0037] As described above, the perimeter structure 1 of the ceiling-embedded equipment 200 according to this embodiment is arranged to connect the ceiling member 300 and the ceiling-embedded equipment 200 in the horizontal direction and comprises a first perimeter member 10 attached to the ceiling-embedded equipment 200 and a second perimeter member 20 attached to the ceiling member 300. Either the first perimeter member 10 or the second perimeter member 20 has a first extension member 31 and a second extension member 32 arranged in the horizontal direction, and the other of the first perimeter member 10 or the second perimeter member 20 has an insertion portion 12 that is inserted into the first extension member 31 and the second extension member 32, and with the insertion portion 12 inserted into the first extension member 31 and the second extension member 32, either the first perimeter member 10 or the second perimeter member 20 is able to move relative to the other in the horizontal direction. Therefore, damage to the ceiling and ceiling-embedded equipment 200 located in the ceiling can be prevented.

[0038] Although embodiments and examples of the present invention have been described in detail above, it will be readily apparent to those skilled in the art that many modifications are possible without substantially departing from the novel aspects and effects of the present invention. Therefore, all such modifications are considered to fall within the scope of the present invention.

[0039] For example, any term that appears at least once in the specification or drawings alongside a broader or synonymous term may be replaced with that different term anywhere in the specification or drawings. Furthermore, the configuration of the molding structure and the molding members used therein are not limited to those described in the embodiments of the present invention, and various modifications are possible. [Explanation of symbols]

[0040] 1 Corner frame structure, 10 First corner frame member, 11, 70 Fixed part, 12 Insertion part, 20 Second corner frame member, 30 Extension part, 31 First extension member, 31a Flat plate part, 31b Inclined part, 32 Second extension member, 200 Equipment, 300 Ceiling member

Claims

1. A cornice structure for ceiling-embedded equipment that is suspended and fixed in the space above the ceiling, with its lower surface exposed through an opening in the ceiling, The opening edges of the ceiling members, which are positioned parallel to the side wall surface of the outer casing of the ceiling-embedded equipment, are arranged at a predetermined distance apart. A first perimeter member having a member positioned vertically and a member positioned horizontally with its tip facing the end of the opening, wherein the vertically positioned member is directly fixed along the side wall surface, It comprises a second perimeter member having a member provided at the periphery of the opening and arranged horizontally, The first and second trim members each have two horizontally positioned members, one of which includes the horizontally positioned member, and the other has a single horizontally positioned member, positioned at approximately the same height as the lower surface of the ceiling member, with its upper and lower surfaces sandwiched between the two members with virtually no gaps. The two horizontally arranged members and the one member are slidable relative to each other in a direction in which the side wall surface and the opening peripheral end move closer to and further apart from each other. The length of the first and second trim members arranged horizontally is shorter than the predetermined distance. The horizontally positioned member of the first perimeter member is composed of a plate-shaped member extending along the horizontal direction and a tip portion provided on the tip side of the plate-shaped member and folded upward. A ceiling-mounted mounting bracket structure characterized in that grooves extending horizontally are formed at the lower end of the vertically positioned member and the folded-back tip of the first mounting bracket member, and the first mounting bracket members can be connected to each other in the horizontal direction by fitting a joint into the grooves.

2. The perimeter structure for ceiling-embedded equipment according to claim 1, characterized in that the two horizontally arranged members are formed to be elastically deformable so that one opens and closes vertically relative to the other.

3. The perimeter structure for ceiling-embedded equipment according to claim 1 or 2, characterized in that the distance between the two horizontally arranged members is smaller on the side of one of the members.

4. A trim member for ceiling-embedded equipment, which is suspended and fixed in the space above the ceiling with its lower surface exposed through an opening in the ceiling, The ceiling member is positioned parallel to the side wall surface of the outer casing of the ceiling-embedded equipment, and the opening perimeter end of the ceiling member is positioned at a predetermined distance from the ceiling member. The ceiling member comprises a vertically positioned member and a horizontally positioned member whose tip faces the opening perimeter end, and the vertically positioned member is directly fixed along the side wall surface. The second corner member is provided at the opening perimeter end and has a horizontally positioned member. The first corner member and the second corner member each have two horizontally positioned members, one of which includes the horizontally positioned member, and the other has one horizontally positioned member positioned at approximately the same height as the lower surface of the ceiling member, with its upper and lower surfaces sandwiched between the two members with virtually no gaps. The two horizontally positioned members and the one horizontally positioned member are slidable from each other in directions that move the side wall surface and the opening perimeter end toward and away from each other. The length of the first and second trim members arranged horizontally is shorter than the predetermined distance. The horizontally positioned member of the first perimeter member is composed of a plate-shaped member extending along the horizontal direction and a tip portion provided on the tip side of the plate-shaped member and folded upward. The lower end of the vertically positioned member of the first trim member and the folded-back tip each have grooves extending horizontally, and by fitting a joint into these grooves, the first trim members can be connected to each other in the horizontal direction. A baseboard member for ceiling-embedded equipment, characterized in that it is used as the first and second baseboard members described above.