JP7845688B2 - Safety device for exterior wall repair work - Google Patents

Description

This invention generally relates to a safety device used in exterior wall repair work for repairing the exterior walls of buildings. More specifically, this invention relates to a disposable safety device for exterior wall repair work that reduces the labor involved in the work, enables safe work, and reduces working time and costs.

Exterior wall repair work on older buildings is generally carried out by workers standing on scaffolding erected around the exterior wall, removing old exterior wall materials such as tiles, and then applying new exterior wall materials. In this process, the old exterior wall materials removed from the wall were temporarily dropped onto the scaffolding and then cleaned up. However, this method has various drawbacks, including the need to install safety nets around the scaffolding to prevent the removed materials from accidentally falling to the ground, which increases the time and effort required for the work and contributes to increased costs.

In light of this situation, the inventors have proposed a safety device and method for exterior wall repair work that reduce the effort involved in repairing the exterior walls of old buildings, thereby decreasing working time and costs (see Patent Documents 1-4). Furthermore, they have also proposed a disposable safety device for exterior wall repair work that avoids the hassle of retrieval (see Patent Document 5).

Patent No. 3446958 Patent No. 4360494 Patent No. 4640949 Patent No. 5382901 Patent No. 6305211

The safety devices and methods for exterior wall repair work described above have fortunately been well-received. In particular, the safety device for exterior wall repair work described in Patent Document 5 is especially popular because it is disposable, thus reducing labor costs.

This invention was developed under these circumstances, and aims to provide a safety device for exterior wall repair work that is an improved version of the device proposed in Patent Document 5, making it more user-friendly.

The safety device for exterior wall repair work, installed between the exterior wall of a building and a work scaffolding as described in claim 1 of this application, comprises an elongated rectangular base plate, a pair of horizontal plates connected to a pair of short sides of the base plate so as to be upright with respect to the base plate, and an exterior wall material storage section positioned on the scaffolding side of the base plate for storing the removed exterior wall material, wherein the exterior wall material storage section comprises an elongated rectangular storage section base plate, a pair of storage section horizontal plates connected to a pair of short sides of the storage section base plate so as to be upright with respect to the storage section base plate, and the storage section bottom so as to be upright with respect to the storage section base plate The scaffolding board has a storage section with a scaffolding side plate connected to the long side of the board on the scaffolding side, and the storage section has a bottom plate connected to the long side of the bottom plate on the scaffolding side, extending along the entire length of the long side of the scaffolding side, and further comprising a positioning plate connected to the long side of the scaffolding side so as to extend substantially downward relative to the plane containing the bottom plate, wherein the length of the short side of the bottom plate is selected to be longer than the distance between the outer wall and the outer wall side of the scaffolding board, and the bottom plate, the side plate, the outer wall material storage section, and the positioning plate are formed of cardboard or corrugated cardboard.

The safety device described in claim 2 of this application is characterized in that, in the device of claim 1, the positioning plate is formed of a folded double plate.

The safety device described in claim 3 of this application is characterized in that, in the device of claim 1 or 2, it further comprises an outer wall contact plate made of cardboard or corrugated cardboard and connected to the long side of the outer wall of the bottom plate.

The safety device of the present invention is firmly fixed between the exterior wall and the scaffolding board, allowing for smooth work without worrying about the device shifting during operation. In this safety device, the bottom plate 12 is inclined downward from the exterior wall, so workers only need to peel off the exterior wall material and drop it downwards at that position. The dropped exterior wall material is collected in the exterior wall material storage section 16, enabling efficient work. Furthermore, by providing the exterior wall contact plate 20, it is possible to reliably prevent the peeled exterior wall material from falling through the gap between the building and the exterior wall. Since the safety device of the present invention is made of cardboard or corrugated cardboard, it can be disposed of without the need for collection work. The safety device of the present invention is extremely easy to install, and compared to conventional methods of surrounding scaffolding with safety nets, it significantly reduces labor and time, as well as labor costs. Moreover, the safety device of the present invention is easily portable and disposable, so it does not require a large storage space.

This is a perspective view of a safety device according to a preferred embodiment of the present invention. Figure 1 is an exploded perspective view of the safety device. Figure 1 is a side view of the safety device. Figure 1 is an example of an exploded view of the safety device. Figure 5(a) is a perspective view showing an example of the safety device in use in Figure 1, and Figure 5(b) is a schematic diagram illustrating the safety device in use in Figure 1. Figure 1 is a side view showing an example of the safety device in use.

Next, with reference to the drawings, a preferred embodiment of the safety device for exterior wall repair work (hereinafter referred to as the "safety device") will be described in detail. Figure 1 is a perspective view of the safety device (scaffolding boards are shown by dashed lines), and Figure 3 is a side view of the safety device shown in Figure 1.

In Figure 1, the safety device according to a preferred embodiment of the present invention, collectively indicated by reference numeral 10, comprises an elongated rectangular base plate 12 and a pair of horizontal plates 14 connected to a pair of short sides 12a of the base plate 12, respectively, so as to be upright relative to the base plate 12. The length of the short sides 12a of the base plate 12 is selected to be longer than the distance L (see Figure 3) between the exterior wall of the building and the exterior wall-side surface A of the scaffolding board (hereinafter referred to as the "exterior wall side").

The safety device 10 also includes an exterior wall material storage section 16 positioned on the scaffolding side of the base plate 12 for storing the removed exterior wall material. The exterior wall material storage section 16 comprises an elongated rectangular storage section base plate 16a, a pair of storage section side plates 16b connected to the pair of short sides of the storage section base plate 16a so as to be upright relative to the storage section base plate 16a, and a storage section scaffolding side plate 16c connected to the long side of the storage section base plate 16a on the scaffolding side so as to be upright relative to the storage section base plate 16a.

The bottom plate 16a of the exterior wall material housing section 16 is connected to the long side 12b of the bottom plate 12 on the scaffolding side, and extends along the entire length of the long side 12b. The exterior wall material housing section 16 is shaped like a "U" in plan view.

A positioning plate 18 is connected to the long side 12b of the base plate 12 on the scaffolding side. This positioning plate extends approximately downward relative to the plane containing the base plate 12. Here, "downward" refers to the direction towards the ground when the safety device 10 is installed between the scaffolding board and the outer wall, as will be described later. The positioning plate 18 helps to position the safety device 10 between the scaffolding board and the outer wall during installation.

The safety device 10 also includes a rectangular exterior wall contact plate 20 connected to the long side 12c of the base plate 12 on the exterior wall side, extending along the entire length of the long side 12c. As will be described later, the exterior wall contact plate 20 is brought into contact with the exterior wall of the building when exterior wall repair work is performed using the safety device 10, preventing fragments of the exterior wall material from falling to the outside.

The safety device 10 consists of a base plate 12, a side plate 14, an outer wall material housing section 16, a positioning plate 18, and an outer wall contact plate 20, all made of cardboard or corrugated cardboard.

The safety device 10 may be formed by preparing, for example, the one shown in Figure 4, folding a predetermined part during use, and applying adhesive to the overlapping tabs to bond them together. Alternatively, the safety device 10 may be formed by preparing separate base plates 12, side plates 14, outer wall material housing 16, positioning plate 18, and outer wall contact plate 20, assembling each plate, and joining them together using tape or the like.

Furthermore, when the safety device 10 is formed as shown in Figure 4, the positioning plate 18 is folded back along the dashed line, resulting in the positioning plate 18 being formed as a double plate. Therefore, the thickness of the positioning plate 18 becomes twice that of the other components, increasing its rigidity, and thus providing a more robust fixation between the outer wall of the safety device 10 and the scaffolding board.

Next, the use of the safety device 10 configured as described above will be explained, mainly with reference to Figures 3, 5, and 6. Figure 5(a) is a perspective view showing the safety device 10 installed in the space between the exterior wall of the building and the scaffolding board. First, the positioning plate 18 is brought into contact with the exterior wall side A of the scaffolding board (see Figure 3), and the exterior wall material housing section 16 is placed on top of the scaffolding board. Next, the exterior wall contact plate 20 is brought into contact with the exterior wall. As a result, since the length of the short side 12a of the bottom plate 12 is selected to be longer than the distance L between the exterior wall and the scaffolding board, the bottom plate 12 is tilted downward from the exterior wall toward the scaffolding board (exterior wall material housing section 16), as shown in Figure 3. Furthermore, because the base plate 12 is flexible in the out-of-plane direction (i.e., the base plate 12 can be bent out-of-plane), when the safety device 10 lightly pushes down on the base plate 12 (see dashed arrow in Figure 3), the base plate 12 bends downward (see dashed line in Figure 3), and the positioning plate 18 is pressed against the scaffolding board side, and the outer wall contact plate 20 is pressed against the outer wall side, thus firmly fixing the scaffolding board between the outer wall and the scaffolding board.

Exterior wall repair work is performed in this manner. The worker peels off the exterior wall material (e.g., tiles) from the scaffolding planks and drops it onto the base plate 12. Since the base plate 12 slopes downward from the exterior wall towards the exterior wall material storage section 16, the exterior wall material hits the base plate 12 and slides down (see Figure 5(b)). In other words, the worker only needs to peel off the exterior wall material and drop it downwards from that position. The dropped exterior wall material slides down the base plate 12 and accumulates in the exterior wall material storage section 16 at the worker's feet. At this time, since the exterior wall contact plate 20 is in contact with the building's exterior wall, it is possible to prevent the peeled exterior wall material from falling outside through the gap between the plate and the building's exterior wall. Furthermore, because the safety device 10 is firmly fixed between the exterior wall and the scaffolding planks, the work can be carried out smoothly without worrying about the safety device 10 shifting during work, unlike the safety device described in Patent Document 5.

Once the repair work is complete, the safety device 10 containing the removed exterior wall material is lowered to the ground, the removed exterior wall material is disposed of in the designated location, and then the safety device 10 is dismantled and disposed of. In this way, repair work can be carried out quickly while ensuring safety.

The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the invention as described in the claims, and these modifications are also included within the scope of the present invention.

For example, the dimensions and detailed shapes of the base plate 12, side plate 14, exterior wall material housing section 16, positioning plate 18, and exterior wall contact plate 20 shown in the illustration are illustrative and not limited to these. Furthermore, the exterior wall contact plate 20 may be omitted, allowing the longer side 12c of the base plate 12 on the exterior wall side to directly contact the exterior wall.

10 Safety device 12 Bottom plate 12a Short side 12b Scaffolding side long side 12c Exterior wall side long side 14 Side plate 16 Exterior wall material housing section 16a Housing section bottom plate 16b Housing section side plate 16c Housing section scaffolding side plate 18 Positioning plate 20 Exterior wall contact plate

Claims (3)

A safety device for exterior wall repair work, installed between the exterior wall of a building and the scaffolding used for the work,
A long, narrow rectangular base plate,
A pair of horizontal boards are connected to the pair of short sides of the base plate so as to stand upright with respect to the base plate,
The base plate is provided with an exterior wall material storage section arranged on the scaffolding side for storing the removed exterior wall material, the exterior wall material storage section having an elongated rectangular storage section base plate, a pair of storage section side plates connected to a pair of short sides of the storage section base plate so as to be upright with respect to the storage section base plate, and a storage section scaffolding side plate connected to the long side of the storage section base plate on the scaffolding side so as to be upright with respect to the storage section base plate, the storage section base plate being connected to the long side of the scaffolding side of the base plate and extending along the entire length of the long side of the scaffolding side,
The scaffolding further comprises a positioning plate connected to the long side of the scaffolding so as to extend substantially downward with respect to the plane including the base plate,
The length of the shorter side of the base plate is selected to be longer than the distance between the outer wall and the outer wall side of the scaffolding board.
The apparatus is characterized in that the bottom plate, the side plate, the outer wall material housing section, and the positioning plate are made of cardboard or corrugated cardboard. The apparatus according to claim 1, characterized in that the positioning plate is formed from a folded double plate. The apparatus according to claim 1 or 2, further comprising an outer wall contact plate formed of cardboard or corrugated cardboard and connected to the long side of the outer wall of the bottom plate.