JP7770249B2 - ceiling protection structure - Google Patents

Description

The present invention relates to a ceiling protection structure that protects bars, metal fittings, equipment, and other items placed on the ceiling of sports facilities and the like from impacts such as balls, and also prevents objects from falling.

BACKGROUND ART Conventionally, measures have been taken in the ceilings of gymnasiums, sporting venues, etc. to prevent impacts from balls and the like and to prevent objects from falling from the ceiling.
For example, Patent Document 1 discloses a net for the ceiling of an indoor space and a method of hanging it, which is composed of a ceiling net body for blocking balls and providing protection, and a net hanging rope for hanging the ceiling net body, and the net hanging rope or the reinforcing rope portion of the ceiling net body is provided with an integral connecting means for connecting them together, and end connecting means are provided for connecting a position near the net hanging rope to the reinforcing rope on both ends of the ceiling net body in the cross direction.

Patent Document 2 also discloses a protective net fence as an emergency measure to prevent ceilings from falling, in which connecting bolts are connected to existing hanging bolts in the existing ceiling space with joint nuts, a net support wire is passed through the wire-passing fittings of multiple connecting bolts, the tension of the end of the net support wire is adjusted with a tamper-evoking wire, and a protective net is tied to the top of the net support wire with a binding wire, covering all or part of the existing ceiling from below.

Patent No. 6380879 Patent No. 5268169

In the case of the conventional ceiling protection structure, multiple ropes are stretched across the entire ceiling and nets are attached to them. The tensioning of these ropes requires careful consideration of the structure from a mechanical standpoint, and the construction work is also large-scale.
Therefore, to deal with cases where flying objects such as balls impact and damage ceiling bars, metal fittings, equipment, and other components, leading to damage to these components, we have developed a ceiling protection structure that is relatively simple in structure and easy to install by expanding on existing ceiling structure technology.

The present invention was made to solve the above problems, and aims to provide a ceiling protection structure that reduces impact on ceiling fittings, fixtures, etc., prevents the adverse effects of impact, and is simple in structure, easy to install, and expandable.

In order to solve the above technical problems, as shown in Figure 1 etc., the present invention comprises long bar members 2 arranged side by side on the ceiling, protective face materials 4 that are made of netting or sheeting and are generally rectangular and flexible, and supports 6 attached to the bar members 2 and have four support portions 43 at the bottom around the periphery that support the corners of the protective face material 4. The supports 6 are each positioned in a position where they can support each corner of the protective face material 4, and each corner of the protective face material 4 is attached to the support portion 43 of the support member 6 arranged above, and the protective face material 4 is placed on the ceiling.

The ceiling protection structure according to the present invention is configured such that a rectangular support plate 40 is attached to the lower part of the support fixture 6, support portions 43 are provided at each corner of the support plate 40, and the support portions 43 are connected to the corners of the protective face material 4 with connecting members 41 to support the protective face material 4.

The ceiling protection structure of the present invention has support holes 44 serving as the support portions 43 provided near each corner of the support plate portion 40 of the support device 6, while retaining pieces 16 having retaining holes 18 are attached to each corner of the protective face material 4, and an engaging member 60 consisting of an engaging member 62 and an engaged member 64 is used as the connecting member 41. The engaging member 62 is attached to the support hole 44 of the support plate portion 40, and the retaining hole 18 of the retaining piece 16 of the protective face material 4 is positioned below the support hole 44. The engaged member 64 is engaged with the engaging member 62 at the top from below via the retaining hole 18, thereby supporting the protective face material 4 on the support device 6.
Alternatively, the locking member 62 can be provided in the support hole 44 of the support plate portion 40, the retaining piece 16 of the protective face material 4 can be placed at the bottom of the support hole 44, and the lockable member 64 can be provided in the retaining hole 18 of the retaining piece 16, so that the locking member 62 and the lockable member 64 are engaged with each other, and the protective face material 4 can be supported by the support device 6.

The ceiling protection structure of the present invention is configured such that a hooking member 20 that hooks onto the bar material 2 is placed above the support 6, and a support member 24 with the support plate portion 40 attached to the lower side is placed below the support 6, while a buffer portion 22 is provided between the hooking member 20 and the support member 24. When the support member moves upward due to the impact of an object colliding with it, the buffer portion 22 is compressed, and this buffering effect reduces the impact on the hooking member 20.

The ceiling protection structure of the present invention is configured to mitigate the impact by placing a cushioning material 36 such as rubber in the cushioning portion 22 of the support 6.

The ceiling protection structure of the present invention is configured such that a bolt member 54 having a shank and a head is placed in the buffer portion 22 of the support device 6, the shank of the bolt member 54 is inserted through the insertion hole 49 of the retaining plate portion 46 provided on the upper side of the support member 24, the head of the bolt member 54 is placed below the insertion hole 49, the upper part of the bolt member 54 is fixed to the support piece portion 34 provided on the lower side of the hanging member 20, and a space 45 is provided between the support member 24 and the hanging member 20 through which the shank of the bolt member 54 is disposed. When the support member 24 moves upward through the insertion hole 49 due to the impact of an object colliding with the bolt member 54, the weight of the support member 24 prevents and cushions the upward movement, and its compression effect alleviates the impact.

The ceiling protection structure of the present invention is configured such that a hollow buffer material 37, such as a coil spring or hollow cylindrical rubber material, is fitted onto the shaft of the bolt member 54 in the space 45 between the support piece 34 and the retaining plate 46. When the support member 24 moves upward, the hollow buffer material 37 is compressed, and the buffering effect of this material reduces the impact.

The ceiling protection structure of the present invention comprises a bolt member 54 having a shaft and a head, which is placed in the buffer portion 22 of the support 6; the shaft of the bolt member 54 is inserted through the insertion hole 49 of the retaining plate portion 46 provided on the upper side of the support member 24; the head of the bolt member 54 is placed below the insertion hole 49; a hollow buffer material 37 such as a coil spring or hollow cylindrical rubber material is fitted onto the shaft of the bolt member 54 in the space between the support piece portion 34 provided on the lower side of the latch member 20 and the retaining plate portion 46; and The shaft is inserted through a hole in the support piece 34 of the hanging member 20 and protrudes upward, and a second hollow cushioning material 39 such as a coil spring or hollow cylindrical rubber material is fitted onto the shaft. The tip of the shaft protruding from the top of the second hollow cushioning material 39 is secured with a nut or the like. The hollow cushioning material 37 cushions any upward movement of the support member 24 due to the impact of an object colliding with it, and when the support member 24 moves downward in reaction to the impact, the cushioning effect of the second hollow cushioning material 39 cushions the impact due to the reaction.

In the ceiling protection structure of the present invention, supports are placed in positions where they can support each corner of the protective face material, and each corner of the protective face material is attached to the support portion of the support placed above, and the protective face material is placed on the ceiling.This configuration allows the protective face material to protect metal fittings, equipment, etc. above the ceiling, and also simplifies the installation of the protective face material, resulting in excellent workability.

The ceiling protection structure of the present invention is configured so that support sections are provided at each corner of the support plate, and the support sections are connected to the corners of the protective surface material with connecting members, thereby supporting the protective surface material. This has the effect of allowing the protective surface material to be positioned appropriately and effectively.

The ceiling protection structure of the present invention is configured so that a locking member is placed in the support hole of the support plate, a locked member is placed in the holding hole of the holding piece, and the locking member and the locked member are engaged with each other, allowing the support device to support the protective face material. This has the effect of speeding up the installation of the protective face material and improving work efficiency.

The ceiling protection structure of the present invention is configured so that a locking member is attached to the support hole of the support plate, and the locked member is attached to the upper locking member from below via the holding hole of the holding piece, and the protective face material is supported by the support fixture. This results in effective and quick installation of the protective face material, improving work efficiency.

The ceiling protection structure of the present invention employs a configuration in which a buffer section is provided between the hook member and the support member, effectively mitigating the impact of an object such as a ball striking the support member and protective surface from below, thereby preventing adverse effects of impacts on the support, protective surface, etc.

The ceiling protection structure of the present invention has cushioning material such as rubber placed in the buffer section of the support, which has the effect of preventing adverse effects such as impacts caused by collisions with objects.

In the ceiling protection structure of the present invention, a bolt member having a shaft and a head is placed in the buffer section of the support device. When the shaft of the bolt member moves upward due to the impact of a collision, the impact is absorbed by the compression effect caused by the buffering action of the weight of the support member. This has the effect of absorbing impact with a simple structure.

The ceiling protection structure of the present invention is configured so that hollow buffer material is fitted between the support piece and the retaining plate, and the shock absorption effect of the hollow buffer material is used to absorb shock, resulting in a stable shock absorption function.

In the ceiling protection structure of the present invention, a hollow buffer material is fitted into the shank of the bolt member in the space between the support piece and retaining plate on the lower side of the hanging member, and a second hollow buffer material is fitted into the shank that protrudes upward through a hole in the support piece of the hanging member. The hollow buffer material absorbs the impact of an object's collision, and when the support member moves downward in reaction to the impact, the cushioning effect of the second hollow buffer material absorbs the impact of the reaction. This configuration cushions both the vertical movement of the support member due to the impact and reduces the impact. Additionally, when an object falls from above, the cushioning effect of the second hollow buffer material also absorbs the impact.

1 is a perspective view showing a ceiling protection structure according to an embodiment. FIG. 10 is a perspective view showing an example in which rubber is used as a cushioning material in the cushioning portion of the support according to the embodiment. FIG. 10 is a perspective view showing an example in which a bolt member is used as a connecting member in a buffer portion of a support according to an embodiment. 10 is a perspective view showing an example in which a bolt member is used in the buffer portion of the support tool and a coil spring is used as a hollow buffer material according to an embodiment. FIG. FIG. 10 is a perspective view showing an example in which a bolt member is used in the buffer section of the support tool and a second hollow buffer material such as rubber is further disposed above the buffer section according to an embodiment. FIG. 10 is a perspective view showing an example in which a hollow cushioning material is arranged in the cushioning section of the support device, and a second hollow cushioning material such as rubber is further arranged above the cushioning section, according to an embodiment. 10A and 10B are diagrams showing fastening members used to connect the support tool and the protective face material according to the embodiment. FIG. 10 is a view showing a hanger for supporting a bar material disposed on a ceiling portion. FIG. 10 is an exploded perspective view showing a form in which a protective face material is attached to a support tool using an attachment member. FIG. 10 is a perspective view showing a form in which a protective surface material is attached to the wall of a room. FIG. 2 is a bottom view of the ceiling protection structure according to the embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a ceiling protection structure according to an embodiment.
This ceiling protection structure is mainly used in gymnasiums, sports venues, halls, etc., and reduces the impact on equipment on the ceiling caused by balls flying in from below or collisions, and also prevents items from falling from above the ceiling.

This ceiling protection structure includes a long bar material 2 arranged horizontally, a protective surface material 4 that is flexible overall, and a support 6 that supports the protective surface material 4.
A long material is used as the bar material 2. This bar material 2 is supported by a long suspension bolt 10 suspended from the ceiling frame and a hanger 12 attached to the bottom of this suspension bolt 10. As the bar material 2, for example, steel material with a square cross section (square pipe), a C-shaped cross section, or a U-shaped cross section is used.
Here, the bar material 2 is a steel material having a rectangular cross section and consisting of a flat surface, left and right side surfaces, and a bottom surface.

The protective face material 4 may be made of netting, cloth, sheeting, board, or other materials, but is not particularly limited as long as it is lightweight and flexible. Netting materials include those made of thread (synthetic fibers, cotton) or steel (twisted wire, chain), while cloth materials include synthetic fibers or cotton. Sheet materials include synthetic resins and rubber, and board materials such as glass wool board can be used.

The protective face material 4 is generally square or rectangular, with each side measuring approximately 500 mm to 1500 mm. A plurality of protective face materials 4 are arranged vertically and horizontally on the ceiling in a grid pattern.
In addition, triangular (right-angled) retaining pieces 16 are attached to the four corners of the protective face material 4 to support these areas. These retaining pieces 16 are face materials such as synthetic resin sheets, and retaining holes 18 are provided in the centers of these retaining pieces 16.

Here, the net material for the protective face material 4 is made of synthetic fiber threads woven into a vertical and horizontal mesh. This net material is, for example, square (900 x 900 mm) overall, with mesh sizes of approximately 50 mm to 150 mm in both the vertical and horizontal directions.

If the balls used in the games inside the facility are tennis balls or the like, the mesh size of the netting material should be 50 mm, and if the balls are volleyballs or basketballs, the mesh size should be 150 mm, and so on. The mesh size can be determined as appropriate.
When the mesh size of the netting material is as described above, it can prevent balls from passing through, and at the same time, it can also conceal and shield the ceiling structure above without blocking the light from the existing ceiling lighting.

Figure 2 shows an example of a support device 6. This support device 6 has a hooking member 20 at the top that hooks onto the bar material 2 to secure it, a buffer part 22 in the middle that cushions impact, and a support member 24 at the bottom that supports the protective face material 4. The hooking member 20, buffer part 22, and protective face material 4 are connected to each other and integrated by a connecting means via the buffer part 22.

The hooking member 20 is made of steel or the like and has a hooking piece 32 bent laterally from the upper part of the side plate portion 30, and a support piece portion 34 bent laterally from the lower part of the side plate portion 30 with a step portion 31 provided therebetween.
The hooking member 20 has a storage area 33 with a U-shaped cross section formed by the hooking piece 32, the side plate portion 30, and the step portion 31, and the bar material 2 is accurately accommodated in this storage area 33. The hooking piece 32 has small pieces formed on the left and right sides, and these small pieces are bendable. In addition, a circular hole 35 is provided in the center of the support piece portion 34.

The buffer section 22 is provided between the hooking member 20 and the support member 24, and is a mechanism that buffers impacts from the support member 24. This buffer section 22 buffers the impact of a ball or other object flying from below, which is applied directly to the support member 24 or to the protective faceplate 4. This impact causes the support member 24 to move upward and compresses the buffer section 22, but the buffering effect of the buffer section 22 buffers and damps the upward movement of the support member 24. The upward movement of the support member 24 then buffers the impact on the hooking member 20, which is fixed to the bar material 2 above the buffer section 22, and the recoil action of the hooking member 20 allows the support member 24 to move up and down via the buffer section 22.

As a mechanism for absorbing impacts from below in the buffer section 22, there is a form in which a buffer material 36 such as rubber is disposed between the hooking member 20 and the support member 24 to utilize its elastic effect. Another form of this mechanism is to connect the hooking member 20 and the support member 24 with a connecting material 38 such as a bolt member 54, and utilize the buffer effect of absorbing upward movement of the support member 24 due to the impact by the weight of the support member 24 itself.
The buffer material 36 may be a rubber material, a synthetic resin material, a spring material (coil spring), etc. The connecting material 38 may be a bolt member (bolt and nut), a string, a wire, etc.

The support member 24 is made of steel or the like, and is integrally formed with a support plate portion 40 made of a rectangular (quadrilateral) plate material and a connecting portion 42 attached to the center of the support plate portion 40. The support plate portion 40 has support portions 43 formed near each of its four corners. The support portions 43 are provided to support the corners of the protective face material 4.
Here, support holes 44 are provided as support portions 43 of support plate portion 40. For example, fastening members 60 are attached to support holes 44 to support the corners of protective face material 4. Alternatively, hooks can be provided as support portions 43, and the corners of protective face material 4 can be supported by wire such as string attached to the hooks.

The connecting portion 42 has a U-shaped cross section and is made up of a holding plate portion 46, side plates 48, and a lower plate 50. A hole 47 (or a through-hole 49 for inserting a bolt member 54) is provided in the center of the holding plate portion 46. The support plate portion 40 and the lower plate 50 of the connecting portion 42 are joined by welding or with bolts and nuts, etc.

The example shown in Figure 2 uses a buffer material 36 as the mechanism for the buffer section 22. Here, a rubber material with a circular cross section is used as the buffer material 36. This buffer material 36 has necks at the top and bottom of the body 52, and enlarged diameter sections 53, 53 that are enlarged in diameter at the base near the necks.

The upper enlarged diameter portion 53 is elastically fitted into the hole 35 provided in the support piece 34 of the hook member 20, and its neck is engaged with the hole 35. The lower enlarged diameter portion 53 is similarly engaged with the hole 47 provided in the retaining plate portion 46 of the connecting portion 42. The enlarged diameter shape of each enlarged diameter portion 53, 53 at its base prevents it from coming off.

In addition, slits through which the necks of the enlarged diameter portions 53, 53 can pass may be provided toward the holes 35, 47 of the support piece portion 34 and the retaining plate portion 46, and the necks of the enlarged diameter portions 53, 53 may be passed through these slits to engage with the holes 35, 47, respectively.

3 shows a structure in which a connecting member 38 is used as the mechanism of the buffer section 22, and in this case, a bolt member 54 is used as the connecting member 38. This bolt member 54 is made up of a head portion 55 and a shaft portion 56, with the head portion 55 located on the lower side and a pair of nuts 57, 57 attached to the portion of the shaft portion 56 where the thread groove is formed.
Then, an insertion hole 49 is formed in the holding plate 46 of the support member 24, and the shank 56 of the bolt member 54 is inserted into this insertion hole 49 from below, with the head 55 positioned below the insertion hole 49. The size of the insertion hole 49 of the holding plate 46 is set to be large enough to allow the shank 56 of the bolt member 54 to be inserted easily and move with ease.

Furthermore, a nut 57 is attached to the shaft 56, the tip of this shaft 56 is passed through the hole 35 provided in the support piece 34 of the hanging member 20, and another nut 57 is screwed onto the shaft 56. The upper and lower parts of the hole 35 in the support piece 34 are then tightened with both nuts 57, 57 to secure the upper part of the bolt member 54 to the support piece 34. This allows the support member 24 to move up and down the shaft 56 of the bolt member 54 together with the insertion hole 49 through the insertion hole 49 of the retaining plate 46.

A space 45 is provided between the support piece portion 34 and the retaining plate portion 46, with the shaft portion 56 of the bolt member 54 interposed therebetween, allowing the support member 24 to move up and down due to impacts such as the upward thrust caused by an object (such as a ball) colliding with the support member 24 or the protective face material 4 from below.
For this reason, the position at which the shaft 56 of the bolt member 54 is fixed to the support piece 34 is set to a position that ensures a sufficient gap between the support piece 34 and the holding plate 46 to allow the holding plate 46 to move up and down. Typically, this gap is about several centimeters.

Meanwhile, as the retaining plate 46 moves up and down, the head 55 of the bolt member 54 also moves up and down within the connecting portion 42 of the support member 24. The connecting portion 42 has a U-shaped cross section and is made up of the retaining plate 46, a side plate 48, and a lower plate 50, and the vertical width of the side plate 48 is the distance over which the head 55 of the bolt member 54 can move.
Generally, the distance over which the holding plate portion 46 can move up and down is set to be approximately the same as the distance over which the head portion 55 of the bolt member 54 can move.

In configurations where the buffer section 22 mechanism uses bolt members 54 as the connecting members 38, the support members 24 are configured to be freely movable up and down. When a force is thrust upward on the support members 24 or protective face coverings 4, such as a collision caused by a ball or other object flying from below, the support members 24 and protective face coverings 4 move upward. However, the weight of the support members 24 and the protective face coverings 4 themselves cushions the upward movement of the support members 24, providing a cushioning effect and mitigating the impact of the collision.

4 shows a configuration in which a hollow buffer material 37 is further added to a mechanism that uses a bolt member 54 as the connecting member 38. Here, a coil spring 58 is used as the hollow buffer material 37, and the coil spring 58 is disposed in the space 45 between the support piece portion 34 and the holding plate portion 46.
Then, after inserting the shaft portion 56 of the bolt member 54 into the insertion hole portion 49 of the retaining plate portion 46 of the support member 24, a coil spring 58 is fitted onto this shaft portion 56, and the upper portion of the shaft portion 56 is fixed to the support piece portion 34 of the hanging member 20 using a pair of nuts 57, 57.

In this case, the support member 24 moves upward in response to the upward force caused by the impact of a ball or the like acting on the support member 24 and the protective face material 4, but at this time, the elastic effect of the coil spring 58 softens the upward movement of the support member 24 and alleviates the impact.
In this case, instead of the coil spring 58, a hollow cylindrical rubber material, synthetic resin material, etc. may be arranged as the hollow cushioning material 37, and this may be elastically deformed to obtain the same elastic effect as the coil spring 58.

The support device 6 shown in Figure 5 is the same as the support device 6 shown in Figure 3, but with a second hollow cushioning material 39 made of a hollow cylindrical rubber material 51 (or coil spring) or the like. This second hollow cushioning material 39 is placed above the support piece 34 of the hanging member 20. In this case, the second hollow cushioning material 39 is fitted onto the shank 56 of the bolt member 54 that protrudes upward from the hole 35 of the support piece 34 of the hanging member 20. The tip of the shank 56 of the bolt member 54 that protrudes from the top of the second hollow cushioning material 39 is then fastened with a fastener such as a nut 57.

In this configuration, instead of the retaining plate portion 46 of the connecting portion 42, a hole is provided in the support plate portion 40 of the support member 24, and the shank 56 of the bolt member 54 is inserted through the hole. Because the support plate portion 40 of the support member 24 has the same function as the retaining plate portion 46 of the connecting portion 42, this function is given to the support plate portion 40 without providing a connecting portion 42. Of course, the connecting portion 42 may also be provided below the buffer portion 22, and the shank 56 of the bolt member 54 may be inserted through the insertion hole 49 of the retaining plate portion 46. The same applies to the connecting portions 42 of the other supports 6.

When a thrust force such as a collision caused by a ball or the like flying from below acts on the support member 24 or protective faceplate 4, this support device 6 reduces the upward movement of the support member 24 by the weight of the support member 24 itself and the protective faceplate 4, thereby absorbing the impact. Furthermore, the support member 24 attempts to move downward due to the reaction to the upward movement caused by the thrust and the weight of the support member 24 itself, but at this time the shock caused by the reaction is absorbed by the cushioning effect of the second hollow buffer material 39. Therefore, this support device 6 cushions both the upward and downward movement of the support member 24 due to the impact, absorbing the impact.
Furthermore, when an object falls from above, the shock applied to the support member 6 or the protective face member 4 is reduced by the cushioning effect of the second hollow cushioning material 39 .

In Figure 6, the hollow cushioning material 37 in the support device 6 shown in Figure 4 has been replaced with a hollow, cylindrical rubber material 59, and a rubber material 51 has been provided as a second hollow cushioning material 39 at the top of the support piece 34 of the hanging member 20. In this case, too, the second hollow cushioning material 39 is fitted onto the shank 56 of a bolt member 54 that protrudes upward from the hole 35 in the support piece 34 of the hanging member 20, and the tip of the shank 56 of the bolt member 54 that protrudes from the top of the second hollow cushioning material 39 is fastened with a nut 57 or the like.

When an upward thrust is applied to the support member 24 or the protective face material 4, such as a collision caused by a ball or the like flying from below, the support member 24 moves upward, but the impact on the support member 24 is absorbed by the elastic effect of the rubber material 59.Furthermore, when the support member 24 tries to move downward due to the recoil caused by the upward thrust, the cushioning effect of the rubber material 51 acts as a second hollow cushioning material 39 to absorb the impact caused by the recoil, cushioning both the upward and downward movements of the support member 24 due to the impact and absorbing the impact.
In this case too, when an object falls from above, the shock applied to the support member 6 or the protective face member 4 is alleviated by the cushioning effect of the second hollow cushioning material 39 .

Next, a description will be given of how the protective face material 4 is attached to the support 6. When attaching the protective face material 4 to the support 6, the support portion 43 provided on the support plate portion 40 of the support 6 is used, and the support portion 43 and the corner portion of the protective face material 4 are attached using the connecting member 41.
The connecting member 41 may be an attachment member 60 such as a snap button, a bolt nut, a screw (tapping screw, etc.), or a fastener such as string or wire. Here, the protective face material 4 is attached to the support hole 44 provided in the support plate 40 using, for example, the attachment member 60.

As shown in Figure 7, the engaging member 60 consists of an engaging member 62 and an engaged member 64 that can be engaged with the engaging member 62. The engaging member 62 consists of a head 66 and an engaging portion 68 that can be fixed to the head 66, with an engaging protrusion 70 formed in the center of the head 66. The engaging portion 68 has a cylindrical engaging portion 72 with an enlarged diameter at its tip, and a fitting hole 74 formed in the center into which the engaging protrusion 70 of the head 66 can be inserted.

The interlocking member 64 consists of a disk-shaped cap portion 78 and an interlocking mold portion 80 that can be fixed to the cap portion 78. The cap portion 78 has a locking protrusion 82 formed in its center, and the interlocking mold portion 80 has a cylindrical interlocking portion 84 formed therein. The tip of the interlocking portion 84 bulges inward, and this portion interlocks with the interlocking portion 72 of the interlocking mold portion 68 of the interlocking member 62. In addition, the interlocking mold portion 80 has a fitting hole 86 formed in its center, into which the interlocking protrusion 82 of the cap portion 78 can be inserted.

Here, the interlocking member 64 of the engaging member 60 connects and integrates the cap portion 78 and interlocking portion 80. In this case, the interlocking protrusion 82 of the cap portion 78 is inserted into the mating hole 86 of the interlocking portion 80, and the tip of the interlocking protrusion 82 is crushed by pressure, joining the two together and integrating the cap portion 78 and interlocking portion 80.

In the engaging member 60, the engaging portion 72 of the engaging member 62 is fitted into the hole-shaped engaged portion 84 of the engaged member 64 by a pressing force, thereby engaging the two and maintaining the engaged state.
At this time, the retaining piece 16 (retaining hole 18) of the protective face material 4 is interposed between the locking member 62 and the locked member 64, and the two are held and fixed by engagement. By using the locking member 60, the protective face material 4 can be easily attached by just the engagement work, improving work efficiency.
In the configuration of the engaging member 60 described here, the cap portion 78 and the engaged portion 80 of the engaged member 64 are connected and integrated.

Another possible configuration is to interpose the retaining hole 18 of the retaining piece 16 of the protective face material 4 between the cap portion 78 and the interlocking portion 80 of the interlocking member 64, with the retaining piece 16 attached to the interlocking member 64. In this case, the locking member 62 attached to the support plate portion 40 of the support 6 is engaged with the interlocking member 64 attached to the retaining piece 16 of the protective face material 4. Therefore, the interlocking state is maintained simply by applying pressure to fit the locking portion 72 of the locking member 62 into the hole-shaped interlocking portion 84 of the interlocking member 64 to lock them together.

Next, the ceiling base structure and construction method for the ceiling protection structure will be described.
This ceiling protection structure is installed on existing ceilings in buildings such as gymnasiums, sports facilities, and public facilities. It is primarily used on ceilings in these buildings that do not have ceiling boards. These ceilings have wiring, piping, and other components attached to the ceiling framework, as well as various metal fittings, ceiling lighting fixtures, air conditioning equipment, and other fixtures. This ceiling protection structure protects these lighting fixtures and other fixtures from impacts such as balls from below, and also prevents components from falling from above.

During construction, steel materials such as suspension bolts 10 suspended from the ceiling frame and hangers 12 are used as base materials on the ceiling of the building. The suspension bolts 10 are rods with a circular cross section and have a threaded groove near the bottom. The bar materials 2 are installed between the multiple hangers 12, and the bar materials 2 are arranged parallel to each other.
Here, for example, a square netting (mesh) material with sides of about 900 mm is used as the protective face material 4. Holding pieces 16 are attached to the four corners of the protective face material 4, respectively.

The distance between the hangers 12 that support the bar materials 2 is, for example, 1800 mm. The distance between the bar materials 2 is 900 mm to match the size of the protective face material 4. The supports 6 are attached to the bar materials 2 at 900 mm intervals. As a result, the supports 6 are placed at the corners of a 900 mm square, the same size as the protective face material 4, and each support 6 supports the protective face material 4. Note that a small gap (narrower than the mesh) may be left between the protective face materials 4.

As shown in Figure 8, the hanger 12 has a central vertical plate portion 93, a flat fixing portion 94 bent horizontally above the vertical plate portion 93, a horizontal plate 97 extending horizontally from a lower portion of the vertical plate portion 93, and a holding plate 95 bent further downward. The fixing portion 94 has an oval or elliptical loose hole 96 that is long toward the tip of the fixing portion 94.

Holes (screw holes) 100, 101 for attaching bolts 98 (or screws) are provided near the lower portion of the vertical plate portion 93 and in the center of the holding plate 95. A holding portion 91 for the bar material 2 is formed between the lower portion of the vertical plate portion 93 and the holding plate 95.
Other types of hangers may be used, such as those having a receiving portion with a U-shaped cross section that holds and supports the bar material 2.

Then, the loose hole 96 provided in the fixing part 94 of the hanger 12 is fitted into the screw groove formed part of the suspension bolt 10, and the upper and lower parts are fixed with nuts. The loose hole 96 allows the position of the hanger 12 to be moved slightly.
The hanging bolts 10 are arranged at positions where the bar material 2 can be supported at two or more points so that the bar material 2 is supported horizontally in a balanced manner.

The length of the hanging bolt 10 is set so that the protective surface material 4 can be placed with a little leeway below fixtures such as lighting fixtures and metal fittings placed on the ceiling.
The bar material 2 is fitted into the holding portion 91 of the hanger 12 and fixed by inserting bolts 98 or the like through the holes 100, 101. This ensures that the bar material 2 is securely fixed to the hanger 12 and safely supports the support 6.

The bars 2 are arranged parallel to one another at regular intervals (900 mm), and supports 6 are attached to the bars 2 at regular intervals (900 mm).
When attaching the support 6 to the bar material 2, the bar material 2 is stored in the storage portion 33 of the hanging member 20, and the bar material 2 is gripped by the hanging piece 32 of the hanging member 20. In other words, the side plate portion 30 of the hanging member 20 is placed against one side surface of the bar material 2, the hanging piece 32 is placed on the flat surface of the bar material 2, and the tip of the hanging piece 32 is bent in this state so that it contacts the other side surface of the bar material 2.

As a result, the bar material 2 is placed in the storage area 33 of the hanging member 20, and the flat surface, one side surface and bottom surface of the bar material 2 are held, and the other side surface of the bar material 2 is grasped and restrained by the bent hanging piece 32.
The other supports 6 are attached to the bar material 2 in the same manner, and the supports 6 are arranged in a manner such that they are placed at each corner of a 900 mm square box.

Next, the protective face material 4 is placed below the support fixture 6. The protective face material 4 has retaining pieces 16 attached to its four corners in advance. The protective face material 4 is attached using the retaining holes 18 of the retaining pieces 16 and the support holes 44 of the support plate portion 40 of the support fixture 6. In this case, the protective face material 4 is attached to the support fixture 6 using the fastening members 60.

When using the engaging member 60, the engaging member 62 of the engaging member 60 is first attached to the support hole 44 of the support plate 40 of the support tool 6. In this case, the head 66 of the engaging member 62 is inserted from above the support hole 44, and the engaging mold portion 68 is placed below the support hole 44. The engaging protrusion 70 of the head 66 is then passed through the support hole 44 and inserted into the mating hole 74 of the engaging mold portion 68, and the tip of the engaging protrusion 70 is crushed by pressure to join the two. In this way, the engaging member 62 is attached to the support hole 44 of the support plate 40 with the support plate 40 interposed therebetween.

As shown in Figure 9, when attaching the protective face material 4, the locked member 64 is attached to the locking member 62 attached to the support plate portion 40 of the support 6, with the retaining piece 16 of the protective face material 4 sandwiched between them. In this case, the locked portion 84 of the locked member 64 is passed through the retaining hole portion 18 of the retaining piece 16 and engaged with the locking portion 72 of the upper locking member 62. The retaining pieces 16 at each corner of the protective face material 4 are then attached to the support plate portion 40 of each support 6. The other protective face materials 4 are attached to the support 6 in the same manner.

For example, if a screw (such as a tapping screw) is used instead of the fastening member 60, the protective face material 4 can be fastened by inserting the screw from below the retaining hole 18 of the retaining piece 16 of the protective face material 4 and screwing it into the support hole 44 provided in the support plate portion 40 of the support fixture 6. When a tapping screw is used, it is self-tapping, so there is no need to thread the support hole 44. Furthermore, when fastening the protective face material 4 with the fastening member 60, a portion of it may be fastened with a screw.

When attaching the protective facing 4 to a building wall 103 or the like, an L-shaped wall support 104 is used instead of the support 6, as shown in Figure 10. This wall support 104 is made by bending a rectangular piece of steel and has a flat fixing piece 106 and a support plate piece 108. The fixing piece 106 has a fixing hole 110, and the support plate piece 108 has support holes 112 near the left and right corners.

In addition, the protective face material 4 may not be usable as is near a wall due to its dimensions, and in such cases, a protective face material 4 with a portion removed is used. Even for this partially removed protective face material 4, retaining pieces 16 are attached to each corner.
When attaching the protective surface material 4 to the wall support 104, the fastening member 60 is also used as the connecting member 41.

In this case as well, the locking members 62 of the fastening members 60 are attached in advance to the support holes 112 of the support plate pieces 108 of the wall support 104. The attachment of the locking members 62 is similar to the attachment to the support 6.
The wall supports 104 are arranged at positions extending from the adjacent supports 6 toward the wall 103. The fixing pieces 106 of the wall supports 104 are fixed to the wall 103 by threading screws 111 or the like into fixing holes 110.

The protective face material 4 is attached to the support 6 by using the fastening members 60, with both retaining pieces 16 on one side and both retaining pieces 16 on the other wall portion 103 side attached to the wall support 104. In this case, the retaining pieces 16 are placed below the locking members 62 attached to the support holes 112 of the wall support 104, and the locked portions 84 of the locked members 64 are passed from below through the retaining holes 18 of the retaining pieces 16, and then locked to the locking members 62 above.

As shown in Figure 11, the protective face materials 4 are installed in a grid pattern across the entire ceiling, arranged lengthwise and widthwise. Although a small gap is provided between adjacent protective face materials 4 in this example, no gap is necessary.
The placement of the protective face material 4 prevents flying balls and the like from coming in, preventing adverse effects such as damage to fixtures and equipment such as metal fittings and lighting fixtures that are placed near the ceiling structure above, and also preventing objects from falling from above.

The ceiling protection structure according to the above embodiment therefore reduces the impact of flying or colliding objects such as sporting balls, protecting existing ceiling equipment such as bars, metal fittings, and lighting fixtures, and preventing damage to these items. Furthermore, this ceiling protection structure protects the support members of the support fixtures or protective surface materials by taking measures to reduce the impact of collisions caused by objects. In addition, the simple nature of the protection structure allows for easy and quick construction, resulting in excellent workability, and is also effective in improving the aesthetic appearance of the ceiling.

2 Bar member 4 Protective surface member 6 Support 16 Holding piece 18 Holding hole portion 20 Hooking member 22 Cushioning portion 24 Support member 34 Support piece portion 35 Hole portion 36 Cushioning material 37 Hollow cushioning material 39 Second hollow cushioning material 40 Support plate portion 41 Connecting member 42 Linking portion 43 Support portion 44, 112 Support hole portion 46 Holding plate portion 49 Insertion hole portion 54 Bolt member 60 Engaging member 62 Engaging member 64 Engaged member

Claims (8)

Long bars arranged horizontally on the ceiling,
a protective face material formed of a net material or a sheet material, having a rectangular shape as a whole, and being flexible;
a support device attached to the bar material and having four support portions around the periphery at the bottom that support corners of the protective face material;
The support devices are arranged at positions where they can support each corner of the protective face material,
A ceiling protection structure characterized in that each corner of the protective surface material is attached to the support portion of the support device arranged above, and the protective surface material is arranged on the ceiling. A ceiling protection structure as described in claim 1, characterized in that a rectangular support plate is attached to the lower part of the support fixture, the support plate is provided at each corner of the support plate, and the support plate and the corners of the protective surface are connected with connecting members to support the protective surface. Support holes are provided in the support tool near each corner of the support plate, and retaining pieces having retaining holes are attached to each corner of the protective face material.
The connecting member is an engaging member consisting of an engaging member and an engaged member,
A ceiling protection structure as described in claim 2, characterized in that the locking member is attached to the support hole portion of the support plate portion, the retaining hole portion of the retaining piece of the protective surface material is arranged at the bottom of the support hole portion, the locked member is engaged with the locking member at the top from below through the retaining hole portion, and the protective surface material is supported by the support device. A hooking member for hooking onto the bar material is disposed on the upper part of the support tool, and a support member having the support plate portion attached to the lower side is disposed on the lower part of the support tool, while a buffer portion is provided between the hooking member and the support member,
4. The ceiling protection structure according to claim 2, wherein the buffer portion is compressed in response to the upward movement of the support member due to the impact of an object colliding with the support member, and the buffering effect of the compressed portion reduces the impact on the hook member. A ceiling protection structure as described in claim 4, characterized in that a cushioning material such as rubber is placed in the buffer portion of the support to absorb the impact. a bolt member having a shaft portion and a head portion is disposed in the buffer portion of the support tool, the shaft portion of the bolt member is inserted through an insertion hole portion of a holding plate portion provided on an upper side of the support member, and the head portion of the bolt member is disposed below the insertion hole portion;
an upper portion of the bolt member is fixed to a support piece portion provided on a lower side of the hanging member, and a space portion in which a shaft portion of the bolt member is interposed is provided between the support member and the hanging member;
A ceiling protection structure as described in claim 4, characterized in that when the support member moves the shank of the bolt member upward through the insertion hole due to the impact of an object colliding with it, the weight of the support member prevents and cushions the upward movement, and its compression effect alleviates the impact. a hollow buffer material such as a coil spring or a hollow cylindrical rubber material is fitted and arranged on a shaft portion of the bolt member in the space between the support piece portion and the holding plate portion;
7. The ceiling protection structure according to claim 6, wherein the hollow buffer material is compressed in response to the upward movement of the support member, and the shock is absorbed by the buffering effect of the hollow buffer material. a bolt member having a shaft portion and a head portion is disposed in the buffer portion of the support tool, the shaft portion of the bolt member is inserted through an insertion hole portion of a holding plate portion provided on an upper side of the support member, and the head portion of the bolt member is disposed below the insertion hole portion;
a space between the support piece provided on the lower side of the latching member and the holding plate, in which a hollow buffer material such as a coil spring or a hollow cylindrical rubber material is fitted and arranged on the shaft portion of the bolt member;
The upper part of the shaft of the bolt member is inserted through a hole provided in the support piece of the hanging member so as to protrude upward, and a second hollow buffer material such as a coil spring or a hollow cylindrical rubber material is fitted and arranged on the shaft, and the tip of the shaft protruding from the upper part of the second hollow buffer material is fastened with a nut or the like,
A ceiling protection structure as described in claim 4, characterized in that the hollow cushioning material cushions the upward movement of the support member due to the impact of an object colliding with it, and when the support member moves downward due to the recoil of the impact, the cushioning effect of the second hollow cushioning material cushions the impact due to the recoil.