JP7515294B2 - Ceiling support fixture - Google Patents

Description

The present invention relates to a ceiling support jig that supports the ceiling of an elevator car by lifting it from the side walls in order to cut the ceiling.

When changing the interior of an elevator car, the car ceiling may need to be replaced. Patent Document 1 discloses a scaffolding device for replacing the car ceiling.

When replacing the ceiling of a car, it is necessary to divide the ceiling in order to remove it, and in order to divide it, the ceiling is cut. In cutting the ceiling, an electric saw is used to cut from an escape hatch opened in the center of the ceiling toward each of the opposing ends of the ceiling. However, if the electric saw gets too close to the ends of the ceiling, there is a risk of damaging the side walls. Therefore, when cutting the ceiling, a worker other than the worker cutting it holds up the ceiling while cutting.

JP 2013-256831 A

However, the cutting work described above needs to be performed by multiple workers. In addition, the ceiling is unstable when the workers hold it up, which can lead to problems with workability, such as broken teeth on the power saw and kickback.

The object of the present invention is to provide a ceiling support tool that allows a single worker to cut the ceiling of an elevator car and improves the workability of the cutting operation.

The ceiling support jig of the present invention is a ceiling support jig that supports the elevator car ceiling by lifting it from the side wall in order to cut it, and is equipped with a pair of support pieces that are inserted into the gap between the side wall and the ceiling at a specified distance, and the support pieces have inner legs that extend downward inside the car.

In the ceiling support jig of the present invention, it is preferable that the inner leg is provided with a magnet that adheres to the side wall.

In the ceiling support fixture of the present invention, the support piece has an outer leg that extends downward on the outside of the car, and it is preferable that the outer leg is shorter than the inner leg.

In the ceiling support jig of the present invention, it is preferable that the top surface of the support piece is formed so as to be inclined toward the inside of the cage.

It is preferable that the ceiling support jig according to the present invention further includes a protective sheet that covers the side walls of the gap between the pair of support pieces.

The ceiling support jig of the present invention allows a single worker to cut the ceiling of an elevator car, improving the workability of the cutting work.

FIG. 2 is a perspective view showing the inside of an elevator car according to an embodiment. FIG. 2 is a perspective view showing a ceiling support jig as an example of an embodiment. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2. FIG. 11 is a perspective view showing a ceiling support jig which is another example of an embodiment. 5 is a cross-sectional view of FIG. 4 taken along line B-B. FIG. 11 is a perspective view showing a ceiling support jig which is another example of an embodiment.

An example of an embodiment of the present invention will be described in detail below. In the following description, specific shapes, materials, directions, values, etc. are merely examples to facilitate understanding of the present invention, and can be changed as appropriate according to the application, purpose, specifications, etc. In the following description, the same reference numerals are used for equivalent elements in all drawings. Furthermore, in the description in the main text, the reference numerals previously mentioned will be used as necessary.

The elevator car 10 according to the embodiment will be described with reference to Figure 1. Figure 1 is a perspective view showing the interior of the car 10.

The elevator car 10 is a device that moves up and down a hoistway installed in a building (a building, an apartment building, etc.) not shown, and travels between landings installed on each floor. The car 10 is capable of carrying passengers and luggage, and is configured as a hollow, roughly rectangular parallelepiped. The car 10 includes a roughly rectangular car floor 11, side walls 12 erected around the perimeter of the car floor 11, and a ceiling 13 installed opposite the car floor 11.

The side walls 12 are constructed of panels with metal surfaces. One of the surrounding side walls 12 that make up the cage 10 is formed with an entrance/exit 14 for passengers and luggage to enter and exit the interior space of the cage 10. A door 16 of a door unit 15 is installed at the entrance/exit 14 so that it can be opened and closed.

The ceiling 13 is configured in a generally rectangular shape, similar to the car floor 11. A generally rectangular rescue exit 17 is formed in the approximate center of the ceiling 13. The rescue exit 17 is an opening for rescuing passengers trapped inside the car 10 in the event of an emergency. The rescue exit 17 is blocked by a rescue door 18.

When changing the interior of the car 10 as part of an elevator renovation, the ceiling 13 of the car 10 is replaced as an example. When replacing the ceiling 13 of the car 10, the ceiling 13 needs to be divided and removed, and work is performed to cut the ceiling 13 in order to divide it. In cutting the ceiling 13, an electric saw is used to cut from the rescue exit 17 in the ceiling 13 toward each of the opposing ends of the ceiling 13. At this time, the ceiling 13 is supported by being raised above the side walls 12 using a ceiling support jig 20, which will be described later.

The ceiling support jig 20, which is an example of an embodiment, will be described with reference to Figures 2 and 3. Figure 2 is a perspective view showing the ceiling support jig 20. Figure 3 is a cross-sectional view taken along line AA in Figure 2.

The ceiling support jig 20 is a jig that supports the ceiling 13 of the elevator car 10 by lifting it off the side wall 12 in order to cut the ceiling 13. The ceiling support jig 20 allows a single worker to cut the ceiling 13 of the elevator car 10, and as will be described in detail later, it is possible to improve the workability of the cutting work.

As shown in FIG. 2, the ceiling support jig 20 includes a pair of support pieces 30 that are inserted between the side wall 12 and the ceiling 13 with a specified gap between them, and a protective sheet 40 that covers the side wall 12 in the gap between the pair of support pieces 30. The gap between the support pieces 30 is preferably 20 to 30 cm.

In the following, the direction from the inside to the outside of the cage 10 is referred to as the depth direction, the direction in which the pair of support pieces 30 are lined up is referred to as the width direction, and the vertical direction perpendicular to the depth direction and width direction is referred to as the up-down direction.

As shown in Figures 2 and 3, the support pieces 30 are members that are fixed to the side walls 12 and support the ceiling 13 by floating it above the upper end surface 12A of the side walls 12. The pair of support pieces 30 allows the ceiling 13 to be stably supported by floating it above the upper end surface 12A of the side walls 12. The support pieces 30 are preferably made of aluminum, for example, but are not limited to this. The support pieces 30 have a main body 31 that is inserted between the side walls 12 and the ceiling 13 of the car 10, an inner leg 32 that extends downward inside the car 10, a magnet 33 provided on the inner leg 32, and a handle 34 that is held by the operator.

The main body 31 is formed in a generally rectangular shape when viewed from the side (widthwise). The main body 31 includes a top surface portion 31T that abuts against the bottom surface 13A of the ceiling 13, an extension portion 31E that is formed by extending the upper end portion including the top surface portion 31T inward in the depth direction, and a bottom surface portion 31B that abuts against the upper end surface 12A of the side wall 12.

The top surface 31T is formed to be inclined inward in the depth direction. The inclination angle of the top surface 31T is approximately the same as the inclination angle of the ceiling 13 when the main body 31 is inserted between the side wall 12 and the ceiling 13 and the ceiling 13 is inclined. As a result, even when the ceiling 13 is in an inclined state, the inclined top surface 31T can abut against the bottom surface 13A of the ceiling 13 and stably support the ceiling 13.

When the ceiling 13 is inclined, the length in the depth direction is shorter than when the ceiling 13 is horizontal. Even when the ceiling 13 is inclined and the length in the depth direction is short, the extension portion 31E extends the length in the depth direction that supports the ceiling 13, so that the ceiling 13 can be prevented from falling when it is supported by the ceiling support jig 20.

The size of the main body 31 in the depth direction is preferably 30 to 40 cm. This allows the support piece 30 to be stably fixed to the side wall 12 even in a car 10 with a thick side wall 12 (long length in the depth direction). The size of the main body 31 in the vertical direction is preferably 20 to 30 cm. This allows the ceiling 13 to be reliably raised from the side wall 12 by the ceiling support jig 20 even if a lighting device is installed on the ceiling 13 and the ceiling 13 has a shape that is convex downward.

The bottom surface portion 31B is formed flat. An inner leg 32 is formed on the inner end side of the bottom surface portion 31B in the depth direction. The outer side of the bottom surface portion 31B in the depth direction may extend outside the side wall 12.

The inner leg 32 is a part that extends downward inside the car 10 and abuts against the inner surface of the side wall 12. The size of the inner leg 32 in the vertical direction is preferably 20 to 30 cm. A magnet 33 is provided on the outside of the inner leg 32 in the depth direction.

The magnet 33 is attached to the metallic surface of the side wall 12. The magnet 33 allows the support piece 30 to be fixed to the side wall 12. The magnet 33 may be a removable magnet. A removable magnet is a magnet that has a mechanism that allows the magnet 33 to move in the depth direction by operating a lever, for example, and can be switched between a state where it is attached to the side wall 12 and a state where it is no longer attached to the side wall 12.

The handle 34 is provided on the inner surface of the support piece 30 (the inner surface of the main body 31 and the inner surface of the inner leg 32). The handle 34 is preferably, for example, arch-shaped. The handle 34 allows an operator to hold the ceiling support jig 20 when carrying it or fixing it to the side wall 12.

The protective sheet 40 is a sheet that covers the side wall 12 in the gap between the pair of support pieces 30 when the ceiling support jig 20 is fixed to the side wall 12 as described above. The protective sheet 40 can prevent cutting chips from the electric saw from getting on the side wall 12 when the electric saw approaches the ceiling support jig 20. In addition, in the unlikely event that the electric saw approaches the side wall 12, the side wall 12 can be protected.

The protective sheet 40 is preferably made of cloth, such as felt. The upper halves of both ends of the protective sheet 40 in the width direction are fixed to the inner surfaces of the body 31 and inner leg 32 of the support piece 30, for example by fixing screws. The vertical length of the protective sheet 40 is preferably longer than the vertical length of the inner leg 32 of the support piece 30, and is preferably 40 to 50 cm.

The ceiling support jig 20 allows a single worker to cut the ceiling 13 of the elevator car 10, improving the workability of the cutting work. Specifically, the support piece 30 is fixed to the side wall 12 and supports the ceiling 13, so the worker does not need to lift and support the ceiling 13.

This prevents one side of the cut ceiling 13 from falling, improving the workability of cutting the ceiling 13. In addition, because the pair of support pieces 30 stably support the ceiling 13, there is no risk of the electric saw breaking or kickback.

The ceiling support jig 20 also improves the workability of the cutting operation. Specifically, the pair of support pieces 30 stably support the ceiling 13, allowing the ceiling 13 to be cut smoothly with an electric saw.

Furthermore, the ceiling support jig 20 is configured so that the support piece 30 is fixed to the upper end of the side wall 12 from inside the car 10, allowing the worker to install the ceiling support jig 20 from inside the car 10. This improves workability compared to when the ceiling support jig 20 is installed from the outside of the car 10.

The ceiling support jig 20 is also made of a simple aluminum support piece 30 and a cloth protective sheet 40, making it inexpensive and easy to manufacture.

The ceiling support jig 20 in this embodiment is configured to include a pair of support pieces 30 and a protective sheet 40, but is not limited to this. For example, the ceiling support jig 20 may be configured only from a pair of support pieces 30.

Using Figures 4 and 5, a ceiling support jig 20, which is another example of an embodiment, will be described. Figure 4 is a perspective view showing the ceiling support jig 20. Figure 5 is a cross-sectional view taken along line B-B of Figure 4.

As shown in FIG. 4, the ceiling support jig 20 includes a pair of support pieces 30 that are inserted between the side wall 12 and the ceiling 13 with a predetermined gap between them, and a protective sheet 40 that covers the side wall 12 in the gap between the pair of support pieces 30. The protective sheet 40 is similar to the protective sheet 40 described above, so a detailed description will be omitted.

The support piece 30 is a member that is installed on the side wall 12 and supports the ceiling 13. The support piece 30 is similar to the support piece 30 described above, except that it does not have a magnet and has an outer leg 35 that extends downward on the outside of the car 10, so a detailed description will be omitted.

The outer leg 35 is a portion that extends downward on the outside of the car 10. The outer leg 35 is shorter than the inner leg 32. In other words, the vertical length of the outer leg 35 is shorter than the vertical length of the inner leg 32. In the support piece 30, the outer leg 35, the main body 31, and the inner leg 32 form a hook shape that can engage with the upper end of the side wall 12.

The hook shape formed on the support piece 30 preferably engages with the upper end of the side wall 12 without any gap, but is not limited to this. For example, as shown in Figures 4 and 5, a gap may be formed between the outer leg 35 and the outer surface of the side wall 12 when the support piece 30 is installed on the side wall 12.

The ceiling support jig 20 of this example does not have a magnet, unlike the ceiling support jig 20 described above, and is composed of a support piece 30 made of aluminum with a simple shape and a protective sheet 40 made of cloth, so it can be manufactured cheaply and easily. In addition, the ceiling support jig 20 of this example is formed so that the outer leg 35 is shorter than the inner leg 32, so that a worker can attach the ceiling support jig 20 from inside the car 10.

Using Figure 6, we will explain a ceiling support jig 20, which is another example of an embodiment. Figure 6 is a perspective view showing the ceiling support jig 20.

As shown in FIG. 6, the ceiling support jig 20 includes a pair of support pieces 30 that are inserted between the side wall 12 and the ceiling 13 with a predetermined gap between them, and a connecting rod 50 that connects the pair of support pieces 30 together.

The support piece 30 is a member that is fixed to the side wall 12 and supports the ceiling 13. The support piece 30 is similar to the support piece 30 described above with reference to Figures 2 and 3, so a detailed description of the support piece 30 is omitted.

The connecting rod 50 is made of metal and is formed, for example, in a cylindrical shape. The connecting rod 50 allows the worker to hold the support piece 30 when carrying it or fixing it to the side wall 12. In addition, in the unlikely event that the electric saw comes close to the side wall 12, the side wall 12 can be protected.

The ceiling support jig 20 of this example does not have a protective sheet 40, unlike the ceiling support jig 20 described above, and is composed of a support piece 30 made of aluminum with a simple shape and a cylindrical connecting rod 50, so it can be manufactured cheaply and easily.

The present invention is not limited to the above-described embodiment and its variations, and various modifications and improvements are possible within the scope of the claims of this application.

REFERENCE SIGNS LIST 10 Ceiling support jig, 11 Floor, 12 Side wall, 13 Ceiling, 14 Entrance/exit, 15 Door unit, 16 Door, 17 Rescue exit, 18 Rescue door, 20 Ceiling support jig, 30 Support piece, 31 Main body, 31B Bottom surface portion, 31B Bottom portion, 31E Extension portion, 31T Top surface portion, 32 Inner leg, 33 Magnet, 34 Handle, 35 Outer leg, 40 Protective sheet, 50 Connecting rod

Claims (5)

A ceiling support jig for cutting the ceiling of an elevator car by lifting the ceiling from a side wall,
a pair of support pieces are provided which are inserted between the side walls and the ceiling with a predetermined gap therebetween;
The support piece has an inner leg extending downward inside the car.
Ceiling support fixture. The ceiling support jig according to claim 1,
The inner leg is provided with a magnet that is attracted to the side wall.
Ceiling support fixture. The ceiling support jig according to claim 1,
The support piece has an outer leg extending downward on the outer side of the car,
The outer leg is shorter than the inner leg.
Ceiling support fixture. The ceiling support jig according to any one of claims 1 to 3,
The top surface of the support piece is formed to be inclined toward the inside of the car.
Ceiling support fixture. The ceiling support jig according to any one of claims 1 to 4,
Further, a protective sheet is provided to cover the side walls of the gap between the pair of support pieces.
Ceiling support fixture.

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