Structure fall prevention device

Abstract

To prevent fall of a structure having a body bottom part supported by a plurality of supports and the supports disposed on a floor surface.SOLUTION: A falling down prevention device 1 is a device that prevents fall of a structure 100 having a body bottom part 103 supported by a plurality of supports 108 and the supports 108 disposed on a floor surface F. The fall prevention device 1 includes: a flat plate member 2 disposed on the floor surface F below the structure 100 and on which the supports 108 are placed; and a connection member 3 that connects the body bottom part 103 of the structure 108 and the flat plate member 2 at a position different from the position of the supports 108.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a device for preventing a structure, the bottom of which is supported by a plurality of supports and which is placed on a floor surface, from tipping over. A typical example of a structure is a portable booth with a plurality of casters (one example of a support), but it also broadly includes any other object that has a plurality of supports at the bottom of its body and is placed on the floor surface and is likely to tip over in an earthquake, such as furniture such as cabinets or shelves (racks) with a plurality of casters or adjusters, electrical (electronic) products such as multifunction printers and refrigerators, display devices for merchandise, exhibit devices for artwork, personal computer servers, and distribution boards. [Background technology]

[0002] In recent years, one- or two-person booths with high soundproofing capabilities have been installed in offices, showrooms, exhibition halls, and the like (see, for example, Patent Document 1). To enhance quietness, such booths are box-shaped, with the ceiling and floor enclosed on all four sides (front, back, left, and right), and are required to be portable on casters or the like from the standpoint of fire prevention measures, etc. Such portable box-shaped booths are sometimes provided with adjusters at the bottom of the booth body to change from a movable state (mobile mode) that can be moved by rolling casters to an immovable state (installed mode). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6764107 Summary of the Invention [Problem to be solved by the invention]

[0004] In a portable box-type booth, the booth body is supported by multiple casters or adjusters (called casters, etc.), so the weight of the booth body is concentrated on the casters, etc., and when the floor shakes due to an earthquake, etc., the casters, etc. may get caught on the floor and the booth may tip over. This type of problem can occur not only with box-type booths, but also with any structure whose main body bottom is supported by multiple supports such as casters or adjusters and is therefore floating above the floor.

[0005] The present invention was made in response to this current situation, and its purpose is to prevent structures in which the bottom of the main body is supported by multiple supports and the supports are placed on a floor surface from tipping over. [Means for solving the problem]

[0006] The device for preventing a structure from tipping over of the present invention is a device for preventing tipping over of a structure whose main body bottom is supported by a plurality of supports and which is placed on a floor surface, and includes a flat plate member that is placed on the floor surface below the structure and on which the supports are placed, and a connecting member that connects the main body bottom of the structure and the flat plate member at a location different from the supports. The flat plate member is disposed on the floor surface without being fixed to the floor surface. This is what is being done.

[0007] According to the anti-tip device of the present invention, the load applied from the structure body to the support is dispersed by the flat plate members and transmitted to the floor surface, preventing the load from concentrating. As a result, when the floor shakes due to an earthquake or the like, the flat plate members are not fixed to the floor surface and can slide along the floor surface without getting caught, thereby suppressing tilting of the structure and ultimately preventing the structure from tipping over. Furthermore, by not fastening the support of the structure to the flat plate members but connecting the bottom of the structure body to the flat plate members at a location different from the support members, the connecting members can absorb the shaking transmitted from the floor surface to the structure body when the floor shakes due to an earthquake or the like, thereby reliably suppressing tilting of the structure and preventing the structure from tipping over.

[0008] In the tip-over prevention device of the present invention, for example, the support body is a caster.

[0009] According to this aspect, when connecting the bottom of the main body of the structure to the flat plate member with the connecting member, the rolling of the casters makes it easy to move and align the structure on the flat plate member, thereby improving workability.

[0010] Furthermore, the tip-over prevention device of the present invention may be configured to include a plurality of connecting members that connect mutually spaced apart portions of the flat plate member to the bottom of the main body of the structure.

[0011] According to this embodiment, the structure body and the flat plate member can be reliably connected, and movement of the structure body relative to the flat plate member can be restricted, thereby preventing the support member of the structure from falling off to the outside of the flat plate member. Note that this embodiment does not exclude a configuration including, for example, one connecting member that connects the center of the bottom of the structure body to the flat plate member in a plan view.

[0012] In the tip-over prevention device of the present invention, the connecting member includes a nut member fixed to the flat plate member, and a bolt member threaded into the nut member and extending in the vertical direction. do.

[0013] According to this aspect, the connecting member can be constructed at low cost, and the structural body can be connected to the flat plate member by the simple operation of fastening the bolt members, improving workability.

[0014] Furthermore, the bolt member may include a double-threaded bolt having threaded portions on both ends, and a nut that is screwed onto the end of the bolt opposite the end that is screwed onto the nut member.

[0015] According to this aspect, one end of each of the threaded bolts is fully screwed into the nut member fixed to the flat plate member, and the nuts are fully screwed into the other ends of each of the threaded bolts, and then the distance between the nut members and the nuts can be adjusted, so that the bottom of the structural body and the flat plate member can be reliably connected to correspond to the width or narrowness of the distance between them.

[0016] In addition, in the fall prevention device of the present invention, the connecting member may be configured to be operable from inside the structure.

[0017] According to this aspect, when connecting or disconnecting the bottom of the main body of the structure and the flat plate member using the connecting member, the worker can operate the connecting member from inside the structure without having to work face down on the floor, thereby improving the workability and speed of the connection or disconnection work using the connecting member. [Effects of the Invention]

[0018] The device for preventing a structure from tipping over of the present invention can prevent a structure whose main body bottom is supported by a plurality of supports and which are placed on a floor surface from tipping over. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic front view of a first embodiment. [Figure 2] FIG. [Figure 3] FIG. 2 is a schematic plan view of the same embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. [Figure 5] FIG. 5 is a longitudinal cross-sectional view taken along the VV position in FIG. [Figure 6] 6A and 6B are schematic diagrams showing the main parts of the second embodiment, in which (A) is a cross-sectional view showing the lower part of the booth, and (B) is a longitudinal sectional view taken along the line VI-VI in (A). [Figure 7] FIG. 10 is a longitudinal sectional view schematically showing a main part of a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] (1) Overview of the First Embodiment Next, embodiments of the present invention will be described with reference to the drawings. First, a first embodiment shown in FIGS. 1 to 6 will be described. This embodiment is applied to preventing a box-shaped booth that is large enough for one person to fit inside and has excellent sound insulation from tipping over. Such a box-shaped booth is an example of a structure in which the bottom of the main body is supported by multiple supports that are placed on the floor surface, and can be installed in a large space in a building and used for various purposes such as web conferences, regular office work, and naps. It is also suitable as a small office.

[0021] As shown in Figures 1 to 4, the box-type booth 100 is made of materials such as wood, metal, and resin, and has a generally rectangular box shape with a space 100a inside which a person can enter. The box-type booth 100 has four booth side sections 101 that surround the space 100a, a booth ceiling section 102 that closes the upper openings of the booth side sections 101, and a booth bottom section 103 that closes the lower openings of the booth side sections 101. One of the booth side sections 101 is provided with an entrance / exit 104, and a horizontally pivoting door 105 is disposed at the entrance / exit 104.

[0022] The booth side portion 101 having the door 105 and the opposing booth side portion 101 have the shape of a vertically elongated rectangle with rounded corners. The booth ceiling portion 102 is provided with a ventilation device 106 for ventilating the space 100a within the box-shaped booth 100, and a fire extinguishing device 107 that operates in the event of a fire breaking out in the space 100a.

[0023] The booth side walls 101, the booth ceiling 102, the booth bottom 103, and the door 105 can also be called the main structure. Also, glass windows can be provided in part or all of the booth side walls 101 and the door 105.

[0024] As shown in Fig. 5, casters 108 are provided at the four corners and two central locations of the flat bottom portion 103a of the booth bottom 103. The box-type booth 100 has the booth bottom 103 supported by six casters 108, which are arranged on the floor F. Each caster 108 is, for example, capable of swiveling horizontally. The installer of the box-type booth 100 can use the casters 108 to move the box-type booth 100 to a desired installation location.

[0025] In this embodiment, the booth bottom 103 of the box-type booth 100 is made of wood. In Fig. 5, the booth bottom 103 is illustrated as being a single piece, but the booth bottom 103 is not limited to being a single piece, and may be made by combining, for example, a plurality of frame materials or plate materials.

[0026] As shown in FIGS. 1 to 5, the area of ​​the box-type booth 100 installed on the floor surface F (the area of ​​the caster arrangement region 109) is small compared to its height. Furthermore, since the box-type booth 100 has a structure in which the main body is supported by a plurality of casters 108, the weight of the box-type booth 100 is concentrated on the casters 108. For these reasons, when the floor surface F shakes due to an earthquake or the like, the casters 108 may get caught on the floor surface, causing the box-type booth 100 to tip over. For this reason, the tip-over prevention device 1 is used.

[0027] In Figure 4, the caster placement area 109 is shown as a rectangle that surrounds the placement area of ​​all casters 108 in a planar view, but it can also be defined as the area surrounded by straight lines that connect the centers of all casters 108.

[0028] (2) Configuration of the fall prevention device The tip-over prevention device 1 is installed between the floor surface F and the box-type booth 100 to prevent tipping of the box-type booth 100. The tip-over prevention device 1 includes a flat plate member 2 that is placed on the floor surface F below the box-type booth 100 and on which casters 108 are placed, and a connecting member 3 that connects the booth bottom 103 of the box-type booth 100 to the flat plate member 2 at a location different from the casters 108.

[0029] The flat plate member 2 is made of metal, and as shown in Fig. 4, is larger than the caster arrangement area 109 in plan view. In this embodiment, the flat plate member 2 is formed in a substantially square shape in plan view, with its edges slightly protruding outward from the main body of the box-type booth 100. The casters 108 of the box-type booth 100 are placed on the flat plate member 2 so that the booth side surface portion 101 and the sides of the flat plate member 2 are substantially parallel in plan view.

[0030] The connecting members 3 are provided at positions corresponding to the four corners of the bottom flat portion 103a of the booth bottom 103. That is, in this embodiment, four connecting members 3 are provided. Each connecting member 3 includes a nut member 4 fixed to one surface of the flat plate member 2 (the surface on the box-type booth 100 side) by, for example, welding, and a bolt member 5 screwed into the nut member 4 from above and extending in the vertical direction. In this embodiment, as shown in FIG. 4, the connecting members 3 are arranged outside the caster arrangement area 109 in a plan view.

[0031] Insertion holes 103b for inserting bolt members 5 are provided in the booth bottom 103 of the box-type booth 100, penetrating the booth bottom 103 in the vertical direction at positions corresponding to the connecting members 3. The insertion holes 103b have an inner diameter slightly larger than the axial diameter of the double-threaded bolts 51 of the bolt members 5. The upper part of the insertion holes 103b opens into a recess 103c provided in the upper surface of the booth bottom 103.

[0032] The bolt member 5 has a double-threaded bolt 51 having threaded portions at both ends, and a nut 52 that is threadedly connected to the double-threaded bolt 51. The double-threaded bolt 51 has, for example, a hexagonal socket, and is inserted into the insertion hole 103b from the side of the space 100a inside the box-type booth 100, with one end screwed into the nut member 4. One end of the double-threaded bolt 51 is sufficiently screwed into the nut member 4, for example, until the one end of the double-threaded bolt 51 abuts against the surface of the flat plate member 2.

[0033] The double-ended threaded bolts 51 are provided to a length such that, with one end threaded into the nut member 4, the other end is exposed in a recess 103c on the surface of the booth bottom 103 of the box-type booth 100. A plain washer 6 and a spring washer 7 are inserted into the other end of each double-ended threaded bolt 51 from the side of the space 100a inside the box-type booth 100, and then a nut 52 is screwed in to press the plain washer 6 toward the bottom of the recess 103c, thereby connecting the flat plate member 2 and the booth bottom 103.

[0034] By sufficiently tightening the nuts 52, a force is applied in the direction narrowing the gap between the flat plate member 2 and the booth bottom 103, and the flat plate member 2 and the booth bottom 103 are firmly connected by the connecting member 3. This restricts the relative movement between the box-type booth 100 and the flat plate member 2. The portable box-type booth 100 can then be made immovable without using an adjuster.

[0035] Furthermore, the connecting member 3 can adjust the distance between the nut member 4 and the nut 52 in a state where one end of the double threaded bolt 51 is fully screwed into the nut member 4 fixed to the flat plate member 2, while the nut 52 is fully screwed into the other end of the double threaded bolt 51. Therefore, the booth bottom 103 and the flat plate member 2 can be reliably connected in accordance with the width or narrowness of the distance between them.

[0036] In this embodiment, by providing multiple connecting members 3, the box-type booth 100 main body and the flat plate member 2 can be securely connected, and the movement of the box-type booth 100 relative to the flat plate member 2 can be restricted, preventing the casters 108 from falling off to the outside of the flat plate member 2.

[0037] In addition, the connecting member 3 may be configured so as not to use the spring washer 7, or so as not to use the flat washer 6 but to have the spring washer 7 contact the bottom of the recess 103c, or so as not to use the flat washer 6 or the spring washer 7 but to have the nut 52 contact the bottom of the recess 103c.

[0038] 5, the other ends of both threaded bolts 51 and nuts 52 are housed in recesses 103c and are concealed by a flooring material 110 such as a carpet placed on the surface of the booth bottom 103. When disconnecting the flat plate member 2 from the booth bottom 103, the flooring material 110 is removed, and both threaded bolts 51 are rotated in the loosening direction and pulled out from the nut members 4.

[0039] In this way, when connecting or disconnecting the booth bottom 103 of the box-type booth 100 and the flat plate member 2 with the connecting member 3, the worker can operate the connecting member 3 from inside the box-type booth 100 without lying face down on the floor F. Therefore, the tip-over prevention device 1 of this embodiment is excellent in terms of workability and speed in the connection or disconnection work using the connecting member 3.

[0040] (3) Summary of the first embodiment By disposing the tip-over prevention device 1 below the box-type booth 100, the load applied to the multiple casters 108 from the box-type booth 100 is dispersed by the flat plate members 2 and transmitted to the floor surface F, preventing the load from concentrating. Furthermore, because the flat plate members 2 are not fixed to the floor surface F, they can slide across the floor surface F without getting caught when the floor surface F shakes due to an earthquake or the like. This prevents the box-type booth 100 from tilting, and ultimately prevents the box-type booth 100 from tipping over.

[0041] Furthermore, the casters 108 that support the main body of the box-type booth 100 are not fixed to the flat plate members 2, but the booth bottom 103 and the flat plate members 2 are connected by the connecting members 3 at a location different from the casters 108, so that when the floor surface F shakes due to an earthquake or the like, the connecting members 3 absorb part of the shaking that is transmitted from the floor surface F to the main body of the box-type booth 100, reliably suppressing the tilt of the box-type booth 100 and preventing the structure from tipping over. In this way, the tip-over prevention device 1 of this embodiment can provide a structure tip-over prevention technology that is simple in structure, easy to install, and highly practical and versatile.

[0042] In this embodiment, the connecting members 3 are provided in positions different from the casters 108, and therefore the weight of the box-type booth 100 is not applied to the connecting members 3. Horizontal vibrations transmitted from the floor surface F to the box-type booth 100 are transmitted from the flat plate members 2 to the connecting members 3 to the box-type booth 100. For example, by deforming (elastically or plastically) the double-threaded bolts 51 and the joints between the flat plate members 2 and the nut members 4 to an extent that does not cause them to break, the connecting members 3 can absorb part of the horizontal vibrations transmitted from the floor surface F to the box-type booth 100.

[0043] 5, in this embodiment, the connecting members 3 restrict movement of the booth bottom 103 in a direction away from the flat plate members 2 (upward movement of the booth bottom 103), but do not restrict movement of the booth bottom 103 in a direction toward the flat plate members 2 (downward movement of the booth bottom 103). In other words, the flat plate members 2 and the booth bottom 103 are allowed to move toward each other relatively, so that when the floor F shakes due to an earthquake or the like, part of the shaking transmitted to the box-type booth 100 can be absorbed by the flat plate members 2 undergoing elastic or plastic deformation, or by the booth bottom 103 bending.

[0044] In this embodiment, the casters 108 and connecting members 3 are provided on the flat bottom portion 103a that is closer to the center than the outer periphery of the box-type booth 100 in a plan view, and are configured so that the casters 108 and connecting members 3 are not easily visible to users when the box-type booth 100 is placed on the anti-tip device 1, resulting in a good appearance. However, in the present invention, the arrangement of the casters 108 and connecting members 3 is not limited to the arrangement in this embodiment, and for example, the casters 108 and connecting members 3 may be arranged near the periphery of the booth bottom 103 so that part of them are within the user's field of vision.

[0045] (4) Second and third embodiments 6, the edge of the flat plate member 2 of the tip-over prevention device 1 is located inside the outer wall surface of the booth side portion 101 of the box-type booth 100 in a plan view, and the flat plate member 2 is unlikely to be in the user's field of vision, resulting in a good appearance. The flat plate size of the flat plate member 2 may be any size as long as it is large enough to accommodate all of the casters 108, and for example, the flat plate size of the flat plate member 2 may be the same as the planar size of the box-type booth 100.

[0046] 7, the bolt member 5 of the connecting member 3 of the anti-toppling device 1 is composed of a headed bolt 53. The bolt 53 has, for example, a hexagonal socket, and can be inserted downward from within the space 100a of the box-type booth 100 into the insertion hole 103b and screwed into the nut member 4, thereby connecting the flat plate member 2 and the box-type booth 100.

[0047] (5) Other Although the embodiments have been described above, the present invention is not limited to the above-described embodiments and can be embodied in various forms. The configuration of each part is not limited to the illustrated embodiments, and various modifications are possible within the scope of the spirit of the present invention. For example, the configurations described in the above-described embodiments and modified examples (notes, etc.) may be combined, and additions, omissions, substitutions, and other modifications of the configurations are possible.

[0048] For example, adjusters that support the booth bottom 103 may be attached to locations on the booth bottom 103 other than the locations where the casters 108 are attached and the locations where the insertion holes 103b are formed. In this case, after the box-type booth 100 is positioned in a predetermined position on the flat plate member 2 by rolling of the casters 108, the adjusters are brought into contact with the upper surface of the flat plate member 2 to make the box-type booth 100 immovable, and the booth bottom 103 and the flat plate member 2 are then connected by the connecting members 3. Because the adjusters (and casters 108) are not fixed to the flat plate member 2, when the floor surface F shakes due to an earthquake or the like, the connecting members 3 absorb some of the shaking, preventing the box-type booth 100 from tipping over.

[0049] Furthermore, the connecting member 3 may be disposed within the caster arrangement area 109 in plan view. Furthermore, when an adjuster is attached to the booth bottom 103, the connecting member 3 may be disposed closer to the center of the box-type booth 100 in plan view relative to the adjuster, or may be disposed closer to the outside.

[0050] Furthermore, the support of the structure does not necessarily have to be a caster or an adjuster, and may be, for example, a downward protrusion that does not have a height adjustment function.

[0051] Furthermore, the structure to which the tip-over prevention device of the present invention is applied is not limited to the box-shaped booth 100, but can also be applied to structures in which the bottom of the main body is supported by multiple supports and the supports are placed on the floor. For example, the present invention can be applied to structures in which the bottom of the main body is supported by multiple supports such as casters and adjusters and is therefore floating above the floor, such as a cart with casters or a cabinet with adjusters. As mentioned in the technical field section, the present invention can also be applied to electrical and electronic devices, vending machines, refrigerators, and product display shelves.

[0052] In addition, regarding a modified example of the anti-tip device of the present invention, a sliding member may be provided on the underside of at least the end of the flat plate member. According to this embodiment, seismic isolation is achieved by reducing friction between the flat plate member and the floor surface, and tilting of the structure is suppressed, thereby preventing the structure from tipping over. Even if the structure sways and tilts during an earthquake, the sliding member provided on the underside of the end of the flat plate member slides on the floor surface in the direction of the structure's tilt, thereby suppressing the swaying of the structure and preventing the end of the flat plate member from catching on the floor surface, preventing the structure from tipping over.

[0053] In the fall prevention device of the present invention, the ends of the flat plate members may be inclined upward so that the distal ends are further away from the floor surface. This configuration reliably prevents the ends of the flat plate members from getting caught on the floor surface when the structure moves due to shaking such as an earthquake, thereby suppressing the swaying (tilting) of the structure.

[0054] It is also possible to combine a configuration in which a sliding member is provided on the underside of the end of the flat plate member with a configuration in which the end of the flat plate member is inclined upward. In this manner, when the structure is in an inclined position, the area of ​​the sliding member provided on the upwardly inclined end of the flat plate member that comes into contact with the floor surface can be increased, making it possible to more reliably prevent the structure from tipping over.

[0055] Furthermore, when the end of the flat plate member has a substantially horizontal shape, the lower corner of the end of the flat plate member may be covered with a sliding member, and the end of the sliding member may be provided above the lower surface of the end of the flat plate member. This prevents the end of the sliding member from coming into contact with and getting caught on the floor surface, and prevents the end of the flat plate member from getting caught on the floor surface and causing the structure to tip over.

[0056] The sliding member may also be provided on the underside of the middle portion of the flat plate member. Here, "middle portion of the flat plate member" means the portion between one end and the other end of the flat plate member. In this embodiment, the area of ​​the sliding member is increased, thereby improving the seismic isolation function, and improving the rocking suppression function and the overturning prevention function of the structure. Note that the portion on the underside of the flat plate member where the sliding member is provided may be a portion of the underside of the flat plate member, or the entire surface.

[0057] The present invention does not exclude the structure having other functions such as a shock absorber in addition to the anti-toppling device. The incorporation of a device to assist the anti-toppling device is preferable as an earthquake countermeasure for the structure. [Explanation of symbols]

[0058] 1 Anti-tip device 2 Flat plate members 3 Connecting members 4 Nut material 5 Bolt material 51 Double-threaded bolt 52 Nut 53 volts 100 Box-shaped booth (example of structure) 100a space 103 Booth bottom (example of the main body bottom) 108 Caster (an example of a support) F Floor surface

Claims

1. A device for preventing a structure from tipping over, the structure having a main body bottom supported by a plurality of supports and the supports placed on a floor surface, comprising: a flat plate member disposed on the floor surface below the structure and on which the support is placed; a connecting member that connects the main body bottom of the structure and the flat plate member at a location different from the support member, the flat plate member is disposed on the floor surface without being fixed to the floor surface, The connecting member includes a nut member fixed to the flat plate member and a bolt member threaded into the nut member and extending in the vertical direction. A device to prevent structures from tipping over.

2. The support is a caster. The anti-tip device according to claim 1 .

3. a plurality of connecting members that connect mutually spaced portions of the flat plate member to the bottom of the main body of the structure; The fall prevention device according to claim 1 or 2.

4. The bolt member is inserted through an insertion hole that penetrates the bottom of the main body in the vertical direction. The fall prevention device according to any one of claims 1 to 3.

5. The bolt member includes a double-threaded bolt having threaded portions on both ends, and a nut screwed onto the end of the bolt opposite to the end screwed onto the nut member. The fixture tip-over prevention device according to any one of claims 1 to 4.

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