JP2024081217A - Car device for elevator work - Google Patents

Abstract

To provide a car device for elevator work, which can freely set dimensions in orthogonal first and second directions of a protection ceiling without a limit.SOLUTION: The car device for elevator work comprises: a work floor provided in a car outer frame; and a protection ceiling provided above the work floor. The protection ceiling is provided with a base 20 having first and second sides in a first direction and third and fourth sides in a second direction orthogonal to the first direction, and one or more extension panels 35, 40 selectively provided for each of the first to fourth sides of the base 20 so as to be detachable from the base 20.SELECTED DRAWING: Figure 3

Description

The present invention relates to an elevator working car device that is used during elevator installation work and includes a working floor attached to the outer frame of a car that can ascend and descend within a hoistway and a protective ceiling installed above the working floor.

A known example of this type of elevator working car device is a device that includes a first protective ceiling section that can be bent at the center in a second direction perpendicular to the first direction, and a second protective ceiling section that can slide in the first direction relative to the first protective ceiling section and bent at the center in the second direction, and that can change the dimension of the protective ceiling in the first direction by expanding and contracting the first and second protective ceiling sections, and change the dimension of the protective ceiling in the second direction by bending the first and second protective ceiling sections, allowing a single protective ceiling to be used even if the ceiling sizes are different (Patent Document 1).

JP 2005-138939 A

However, in the device described in Patent Document 1, the dimension of the protective ceiling in the first direction is changed only by expansion and contraction, which results in the problem that the minimum and maximum dimensions mutually limit each other. In other words, if one wishes to increase the maximum dimension, the minimum dimension also increases, and conversely, if one wishes to decrease the minimum dimension, the maximum dimension also decreases.

In addition, in the device described in Patent Document 1, the dimension of the protective ceiling in the second direction is changed only by bending it, so the smaller the dimension of the protective ceiling in the second direction is, the larger the height dimension of the protective ceiling becomes, and if the top dimension of the elevator shaft is small, there is a problem that the device may not be able to reach the top of the elevator shaft.

The present invention was made in consideration of these circumstances, and aims to provide an elevator working car device that allows the dimensions of the protective ceiling in the perpendicular first and second directions to be freely set without restrictions.

The working cage device of the elevator according to the present invention comprises:
A work floor provided on the car outer frame;
A protective ceiling provided above the work floor,
The protective ceiling is
a base having a first side portion and a second side portion in a first direction and a third side portion and a fourth side portion in a second direction perpendicular to the first direction;
and one or more extension panels that are detachable from the base and selectively provided for each of the first to fourth sides of the base.

Here, as one aspect of the elevator working car device according to the present invention,
The stretchable panel may be selectively provided in two types: an extendable type in which a first panel and a second panel that overlap one above the other are slidably connected, and a non-extendable type consisting of only a single panel.

In addition, as another aspect of the elevator working car device according to the present invention,
the base includes a locking portion on each of the first side portion to the fourth side portion;
The extension panel may have an engagement portion that releasably engages with the locking portion of the base.

In addition, as another aspect of the elevator working car device according to the present invention,
The base may have an opening large enough to pass the parallel portion of the main rope created by winding it around the sheave, and a cover panel having a notch or slit for passing the main rope and closing the opening.

Also, in this case,
The opening is circular;
The cover panel may be a circular plate larger than the opening and may have two notches spaced equally apart in the circumferential direction.

In addition, as still another aspect of the elevator working car device according to the present invention,
The protective ceiling may have a corner panel that fills in a gap between the edge portions of two extension panels provided on two adjacent sides of the base.

Also, in this case,
The corner panels may be of an extendable type in which a first corner panel and a second corner panel overlap each other vertically and are slidably connected to each other.

In addition, as still another aspect of the elevator working car device according to the present invention,
The base may be configured to include legs that are detachably fixed to the upper horizontal frame of the car outer frame.

Also, in this case,
The legs include locking portions,
The extension panel includes an arm extending diagonally downward toward the leg,
The arm may have an engagement portion at its tip that releasably engages with the locking portion of the leg.

According to the present invention, by selecting whether or not to use an extension panel for each of the first to fourth sides of the base, the dimensions of the protective ceiling in the first and second orthogonal directions can be set appropriately. Therefore, according to the present invention, the dimensions of the protective ceiling in the first and second orthogonal directions can be set freely without restrictions.

FIG. 1 is a perspective view of an elevator working car device according to this embodiment. FIG. 2 is a perspective view of a protective ceiling of the work cage apparatus. FIG. 3 is an exploded perspective view of the protective ceiling. FIG. 4 is a perspective view of the base of the protective ceiling. 5(a) and 5(b) are exploded perspective views of a telescopic extension panel of a protective ceiling; 6(a) is a perspective view of a state where a telescopic extension panel is attached to a base, and FIG 6(b) is a perspective view of a state where a telescopic extension panel is attached to a base. 7(a) is a perspective view of a non-telescopic stretchable panel being attached to a base, and FIG. 7(b) is a perspective view of a non-telescopic stretchable panel being attached to a base. FIG. 8 is an exploded perspective view of a corner of a protective ceiling. Figure 9(a) is a perspective view of a protective ceiling constructed using one telescopic extension panel and two non-telescopic extension panels, and Figure 9(b) is a perspective view of the telescopic extension panel in an extended state. Figure 10(a) is a perspective view of a protective ceiling constructed using two telescopic extension panels and two non-telescopic extension panels, and Figure 10(b) is a perspective view of the telescopic extension panels in an extended state. Figure 11(a) is a perspective view of a protective ceiling constructed only with a base without any extension panels, and Figure 11(b) is a perspective view of a protective ceiling constructed with two non-telescopic extension panels. Figure 12(a) is a perspective view of a protective ceiling constructed using two telescopic extension panels, and Figure 12(b) is a perspective view of a protective ceiling constructed using two telescopic extension panels in the form of a non-telescopic extension panel. FIG. 13 is a perspective view of the protective ceiling with the lid panel removed. FIG. 14 is a perspective view of a protective ceiling constructed using different lid panels.

The elevator working cage device according to this embodiment will be described below. The elevator working cage device (hereafter abbreviated as "working cage device") refers to a device used in a construction method in which, during elevator installation work, guide rail construction and machine room construction are carried out in advance using other construction methods (using scaffolding, gondolas, etc.), the main equipment (the cage outer frame, main rope, hoist, counterweight, etc.) is made operable (the equipment actually used as part of the elevator), a workshop is set up on the cage outer frame, and the cage outer frame is raised and lowered in the hoistway to carry out other construction work.

As shown in FIG. 1, the working cage device 1 includes a permanent cage outer frame 2, a permanent cage sheave case 3, a permanent main rope 4, a temporary lower work area 5, and a temporary upper work area 8.

The cage outer frame 2 is composed of left and right vertical frames 2a, 2a, a lower horizontal frame 2b, and an upper horizontal frame 2c. Each frame 2a, 2b, 2c is composed of, for example, channel steel (channel steel). The lower horizontal frame 2b connects the lower ends of the left and right vertical frames 2a, 2a. The upper horizontal frame 2c connects the upper ends of the left and right vertical frames 2a, 2a. The upper horizontal frame 2c is composed of two steel members arranged at a specified interval.

A cage sheave case 3 is attached below the center of the upper horizontal frame 2c. A cage sheave (not shown) is rotatably housed inside the cage sheave case 3. One end of the main rope 4 is fixed to the top of the hoistway, passes through the gap between the two steel members of the upper horizontal frame 2c and is wound around the cage sheave, and is also wound around a sheave (not shown) of a counterweight (not shown), and the other end is fixed to the top of the hoistway (so-called 2:1 roping). The main rope 4 is composed of multiple ropes arranged in parallel at a predetermined interval. The main rope 4 runs when the drive sheave (not shown) of the hoisting machine (not shown) rotates, and as a result, the working cage device 1 to which the cage sheave is attached can rise and fall in the hoistway.

The lower work area 5 includes a lower work floor 6 and fall prevention equipment 7. The lower work floor 6 is constructed using a permanent car floor that is installed on the lower horizontal frame 2b of the car outer frame 2. The fall prevention equipment 7 is composed of protective panels, handrails, bars, baseboards, etc. that are installed so as to surround the lower work floor 6.

The upper work area 8 comprises an upper work floor 9, fall prevention equipment 11-13, and a protective ceiling 15. The upper work floor 9 is made up of multiple scaffolding boards 10, ... The fall prevention equipment 11 is made up of handrails, braces, etc. attached to the left and right vertical frames 2a, 2a of the car outer frame 2. The fall prevention equipment 12 is made up of handrails, braces, etc. attached to one side of the outer periphery of the upper work floor 9. The fall prevention equipment 13 is made up of baseboards.

2 and 3, the protective ceiling 15 includes a base 20, an extension panel 35, an extension panel 40, and a corner panel 45. The base 20 has a first side and a second side in a first direction X, and a third side and a fourth side in a second direction Y perpendicular to the first direction X. In this embodiment, the first side and the second side are parallel, and the third side and the fourth side are parallel. The extension panel 35 is detachable from the base 20 and is selectively provided on each of the first and second sides of the base 20. The extension panel 40 is detachable from the base 20 and is selectively provided on each of the third and fourth sides of the base 20. The corner panel 45 fills in the missing portion between the edge portions of the two extension panels 35, 40 provided on the two adjacent sides of the base 20.

The base 20 includes a base body 21 and a cover panel 32. The extension panel 35 includes a first panel 36 and a second panel 37. The extension panel 40 includes a panel 41. The corner panel 45 includes a first corner panel 46 and a second corner panel 47. The base body 21 has a rectangular shape (in this embodiment, a square shape) in a plan view. The panels (first panel 36 and second panel 37) of the extension panel 35 have the same width as the first side and second side of the base body 21, and have a rectangular shape (in this embodiment, a rectangular shape) in a plan view. The panel (panel 41) of the extension panel 40 has the same width as the third side and fourth side of the base body 21, and has a rectangular shape (in this embodiment, a rectangular shape) in a plan view. The corner panel 45 (first corner panel 46 and second corner panel 47) has the same width as the edge of the extension panel 35 (first panel 36 and second panel 37) and the edge of the extension panel 40 (panel 41), and has a rectangular shape (square shape in this embodiment) in a plan view. The base body 21, the cover panel 32, the extension panel 35 (first panel 36 and second panel 37), the extension panel 40 (panel 41), and the corner panel 45 (first corner panel 46 and second corner panel 47) are arranged along a horizontal plane, and have an overall rectangular shape (rectangular shape in this embodiment) in a plan view, constituting the ceiling portion of the protective ceiling 15.

As shown in FIG. 4, the base body 21 of the base 20 is made of a metal plate such as a steel plate or an aluminum plate, with both ends in the second direction Y bent upward into a belt shape (standing portion) to improve strength. The base body 21 has an opening 21a at the center, which is large enough to pass the parallel part of the main rope 4 generated by winding it around the car sheave. The opening 21a is circular. The base body 21 is divided into two divided bodies 22, 22 along a line that crosses the opening 21a (in this embodiment, the center line along the first direction X). The divided ends of the two divided bodies 22, 22 are connected to each other via a connecting piece 23 to form one base body 21. The reason why the base body 21 is made to be a divided type is that the main rope 4 is placed in the opening 21a when the protective ceiling 15 is installed on the car outer frame 2. The divided ends of the divided body 22 and the connecting piece 23 are separably connected to each other by known connecting means such as a combination of a screw and a screw hole, or a combination of a screw and a nut.

The base 20 includes legs 24. The legs 24 are detachably fixed to the upper horizontal frame 2c of the car outer frame 2, and fix the protective ceiling 15 to the car outer frame 2. The legs 24 are provided on each of the two divided bodies 22, 22. More specifically, the legs 24 are provided on each side of the third side and the fourth side of the base body 21. The legs 24 include two upper legs 25, 25, two lower legs 26, 26, and a bracket 27. All of them are made of metal material. The two upper legs 25, 25 are joined to each side of the third side and the fourth side of the base body 21 with a gap in the first direction X. The upper legs 25 and the lower legs 26 are slidably connected to each other, making the legs 24 extendable and retractable. The bracket 27 connects the lower ends of the two lower legs 26, 26 to each other, and is detachably fixed to the upper horizontal frame 2c of the car outer frame 2.

The base 20 has a locking portion 28 on each of the first and second sides, and a locking portion 30 on each of the third and fourth sides. The locking portions 28 are provided at two locations on each of the first and second sides with a gap in the second direction Y. The locking portions 30 are provided at two locations on each of the third and fourth sides with a gap in the first direction X. The locking portions 28 and 30 have shafts. As an example, the locking portion 28 is inserted into a hole formed in the base body 21 (the upright portion), and is configured using a bolt into which a washer is inserted as necessary and into which a nut is screwed. As an example, the locking portion 30 is inserted into a hole formed in the upper leg 25, and is configured using a bolt into which a washer is inserted as necessary and into which a nut is screwed.

The base 20 has a locking portion 29 at a lower portion of each of the first and second sides, and a locking portion 31 at a lower portion of each of the third and fourth sides. The locking portion 29 is provided at two locations at the lower portion of each of the first and second sides, spaced apart in the second direction Y. The locking portion 31 is provided at two locations at the lower portion of each of the third and fourth sides, spaced apart in the first direction X. The locking portions 29 and 31 have shafts. As an example, the locking portion 29 is inserted into a hole formed in the upper leg 25 (a bracket joined to the upper leg 25) and is configured using a bolt into which a washer is inserted as necessary and into which a nut is screwed. As an example, the locking portion 31 is inserted into a hole formed in the upper leg 25 and is configured using a bolt into which a washer is inserted as necessary and into which a nut is screwed.

The cover panel 32 of the base 20 has a notch 32a for passing the main rope 4 through and closes the opening 21a of the base body 21. The cover panel 32 is a circular plate larger than the opening 21a, and has notches 32a, 32a at two equal circumferential locations (two locations in the second direction Y). The cover panel 32 is made of a metal plate such as a steel plate or an aluminum plate, or a resin plate. The peripheral portion of the opening 21a of the base body 21 and the cover panel 32 are separably joined by known joining means such as a combination of a screw and a screw hole, or a combination of a screw and a nut. In this way, the cover panel 32 is detachably attached to the peripheral portion of the opening 21a of the base body 21.

As shown in FIG. 5, the extension panel 35 is a telescopic type in which the first panel 36 and the second panel 37 are slidably connected. As an example, slide long holes 36a, 36a are formed along the short sides of the first panel 36 at both ends of the first panel 36, and rivet nuts 37a, 37a are joined to both ends of the second panel 37, and thumb screws (not shown) inserted into the slide long holes 36a, 36a are screwed into the rivet nuts 37a, 37a. When the thumb screws are loosened, the extension panel 35 can be extended and retracted, and when the thumb screws are tightened, the extension panel 35 is fixed in its extended and retracted state. The first panel 36 and the second panel 37 are made of metal plates such as steel plates and aluminum plates. The first panel 36 and the second panel 37 are punched to reduce their weight. The punched holes in the first panel 36 are elongated holes that run along the long sides of the first panel 36, and the punched holes in the second panel 37 are elongated holes that run along the short sides of the second panel 37.

The extension panel 35 includes a bracket 38 and an arm 39. The bracket 38 is joined to the underside of both ends of the first panel 36 along the short side of the first panel 36. The bracket 38 includes an engagement portion 38a at the tip. One end of the arm 39 is rotatably connected to the bracket 38, extends diagonally downward along the short side of the first panel 36, and includes an engagement portion 39a at the tip. The engagement portions 38a, 39a include hook portions. As shown in FIG. 6, the engagement portion 38a engages with the locking portion 28 of the base 20 from above and is detachably engaged. The engagement portion 39a engages with the locking portion 29 of the base 20 from above and is detachably engaged. Then, the bolts and nuts of the locking portions 28, 29 of the base 20 are fastened, so that the extension panel 35 is attached integrally to the base 20.

As shown in FIG. 7, the extension panel 40 is a non-stretchable panel consisting of only one panel 41. The panel 41 is made of a metal plate such as a steel plate or an aluminum plate. The panel 41 is punched to reduce its weight. The punched holes are long holes that run along the long sides of the panel 41.

The extension panel 40 includes a bracket 42 and an arm 43. The bracket 42 is joined to the underside of both ends of the panel 41 along the short side of the panel 41. The bracket 42 includes an engagement portion 42a at the tip. One end of the arm 43 is rotatably connected to the bracket 42, extends diagonally downward along the short side of the panel 41, and includes an engagement portion 43a at the tip. The engagement portions 42a, 43a include hook portions. The engagement portion 42a engages with the locking portion 30 of the base 20 from above and is detachably engaged. The engagement portion 43a engages with the locking portion 31 of the base 20 from above and is detachably engaged. Then, the bolts and nuts of the locking portions 30, 31 of the base 20 are fastened, so that the extension panel 40 is attached integrally to the base 20.

8, the corner panel 45 is of an expandable type in which the first corner panel 46 and the second corner panel 47 are slidably connected. As an example, the first corner panel 46 has slide slots 46a, 46a formed along one of the two orthogonal sides of the first corner panel 46, and rivet nuts 47a, 47a are joined to the second corner panel 47. Thumb screws (not shown) inserted into the slide slots 46a, 46a are screwed into the rivet nuts 47a, 47a. When the thumb screws are loosened, the corner panel 45 can expand and contract, and when the thumb screws are tightened, the expanded and contracted state of the corner panel 45 is fixed. The first corner panel 46 and the second corner panel 47 are made of metal plates such as steel plates and aluminum plates.

Rivet nuts 46b, 46b are joined to one of the two orthogonal sides of the first corner panel 46, and holes 36b, 36b are formed at both ends of the first panel 36 of the stretched panel 35, and screws (not shown) inserted into the holes 36b, 36b are screwed into the rivet nuts 46b, 46b to connect the first panel 36 and the first corner panel 46. Rivet nuts 46c, 46c are joined to the other of the two orthogonal sides of the first corner panel 46, and holes 41a, 41a are formed at both ends of the panel 41 of the stretched panel 40, and screws (not shown) inserted into the holes 41a, 41a are screwed into the rivet nuts 46c, 46c to connect the panel 41 and the first corner panel 46. As a result, the stretched panel 35, the corner panel 45, and the stretched panel 40 are integrally connected.

The working cage device 1 according to this embodiment has the above configuration. Next, an example of the configuration of the protective ceiling 15 will be described. In the following description, the extension panel 35 will be referred to as the extendable extension panel 35, and the extension panel 40 will be referred to as the non-extendable extension panel 40.

Figure 9 (a) shows an example configuration (example configuration 1) of a protective ceiling 15 constructed using one telescopic extension panel 35 in a contracted state (non-extended state) and two non-telescopic extension panels 40, 40.

Figure 9 (b) shows a configuration example (configuration example 2) of a protective ceiling 15 constructed using one telescopic extension panel 35 in an extended state and two non-telescopic extension panels 40, 40. When the telescopic extension panel 35 is extended, the corner panel 45 is also extended so that the missing parts that occur as a result of the extension are filled (same below).

Figure 10 (a) shows an example configuration (example configuration 3) of a protective ceiling 15 constructed using two retractable extension panels 35, 35 in a contracted state and two non-retractable extension panels 40, 40.

Figure 10 (b) shows an example configuration (example configuration 4) of a protective ceiling 15 constructed using two stretchable extension panels 35, 35 in an extended state and two non-stretchable extension panels 40, 40.

Alternatively, the protective ceiling 15 may be constructed using one telescopic extension panel 35 in an extended state, one telescopic extension panel 35 in a contracted state, and two non-telescopic extension panels 40, 40 (configuration example 5).

Alternatively, the protective ceiling 15 may be constructed using one non-telescopic extension panel 40 instead of two in configuration examples 1 to 5 above (configuration examples 6 to 10).

Figure 11 (a) shows an example configuration (configuration example 11) of a protective ceiling 15 constructed only with a base 20 without using extension panels 35, 40.

Figure 11 (b) shows a configuration example (configuration example 12) of a protective ceiling 15 constructed using two non-telescopic extension panels 40, 40 without using an extendable extension panel 35.

Alternatively, the protective ceiling 15 may be constructed using a single non-telescopic extension panel 40 without using the telescopic extension panel 35 (configuration example 13).

Figure 12 (a) shows a configuration example (configuration example 14) of a protective ceiling 15 configured using two telescopic extension panels 35, 35 in a contracted state without using a non-telescopic extension panel 40.

Alternatively, the protective ceiling 15 may be constructed using two extended telescopic extension panels 35, 35 without using a non-telescopic extension panel 40 (configuration example 15).

Alternatively, the protective ceiling 15 may be constructed using one telescopic extension panel 35 in an extended state and one telescopic extension panel 35 in a contracted state without using a non-telescopic extension panel 40 (configuration example 16).

Alternatively, the protective ceiling 15 may be constructed using a single telescopic extension panel 35 in a contracted state without using a non-telescopic extension panel 40 (configuration example 17).

Alternatively, the protective ceiling 15 may be constructed using a single extended telescopic extension panel 35 without using a non-telescopic extension panel 40 (configuration example 18).

Figure 12 (b) shows an example configuration (example configuration 19) of a protective ceiling 15 configured using two telescopic extension panels 35, 35 in the form of non-telescopic extension panels without using the second panel 37 of the telescopic extension panel 35.

Alternatively, the protective ceiling 15 may be constructed using one telescopic extension panel 35 in the form of a non-telescopic extension panel without using the second panel 37 of the telescopic extension panel 35 (configuration example 20).

As described above, with the working cage device 1 according to this embodiment, the dimensions of the protective ceiling 15 in the orthogonal first direction X and second direction Y can be appropriately set by selecting whether or not to use the extension panels 35, 40 for each of the first to fourth sides of the base 20 and whether or not to extend the extension panels 35. Therefore, with the working cage device 1 according to this embodiment, the dimensions of the protective ceiling 15 in the orthogonal first direction X and second direction Y can be freely set without restrictions. Moreover, by selectively providing multiple types of extension panels 35, 40 with different sizes (protruding lengths from each side of the base 20), the variety can be further increased.

In addition, according to the working cage device 1 of this embodiment, the ceiling portion of the protective ceiling 15 is composed of the base body 21, the cover panel 32, the panels of the extension panel 35 (first panel 36 and second panel 37), the panel of the extension panel 40 (panel 41), and the panels of the corner panel 45 (first corner panel 46 and second corner panel 47), and is always deployed along a horizontal plane regardless of the dimensions in the orthogonal first direction X and second direction Y. Therefore, according to the working cage device 1 of this embodiment, the height dimension of the protective ceiling 15 does not change, and there is no risk that the working cage device 1 will not be able to reach the top of the elevator shaft if the top dimension of the elevator shaft is small.

In addition, with the work cage device 1 according to this embodiment, the extension panels 35, 40 can be easily attached and detached simply by engaging and disengaging the engagement portions 38a, 39a, 42a, 43a with the locking portions 28-31 of the base 20. Therefore, with the work cage device 1 according to this embodiment, the device can be assembled and disassembled easily and quickly.

In addition, according to the working cage device 1 of this embodiment, an opening 21a is formed in the base body 21, and a cover panel 32 having notches 32a, 32a that closes the opening 21a is provided, so that the protective ceiling 15 can be installed without interfering with the main rope 4. Therefore, according to the working cage device 1 of this embodiment, the protective ceiling 15 can be applied to an elevator with so-called 2:1 roping.

The protective ceiling 15 can also be applied to so-called 1:1 roping type elevators, in which one end of the main rope is fixed to the center of the upper horizontal frame 2c of the car outer frame 2 and the other end of the main rope is fixed to the counterweight, by removing the cover panel 32, as shown in Figure 13.

Alternatively, as shown in FIG. 14, a protective ceiling 15 can be applied to a so-called 1:1 roping elevator by using a cover panel 32 having a slit 32b that extends from a portion of the periphery to the center (more preferably, a slit 32b that expands toward the center).

In addition, according to the working cage device 1 of this embodiment, the corner panels 45 are used to fill in any missing parts that occur at the corners of the ceiling part of the protective ceiling 15. Therefore, according to the working cage device 1 of this embodiment, the ceiling part of the protective ceiling 15 can be finished in an appropriate shape, and a high protective effect can be obtained.

The present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention.

In the above embodiment, a telescopic stretching panel 35 is applied to the first and second sides of the base 20, and a non-telescopic stretching panel 40 is applied to the third and fourth sides of the base 20. However, the present invention is not limited to this. A non-telescopic stretching panel may be applied to the first and second sides of the base 20, or a telescopic stretching panel may be applied to the third and fourth sides of the base 20.

In addition, in the above embodiment, the extension panels 35, 40 are attached to the base 20 by an engagement structure between the locking portions 28-31 of the base 20 and the engagement portions 38a, 39a, 42a, 43a of the extension panels 35, 40. However, it goes without saying that the attachment structure of the extension panels to the base is not limited to this, and various known structures can be adopted.

In addition, in the above embodiment, arms 39, 43 are used as reinforcing members in the extension panels 35, 40. However, if there are no problems with load-bearing capacity, arms 39, 43 are not required.

In addition, terms that specify a shape, part, state, or direction, such as "rectangle," "square," "rectangle," "center," "centre," "end," "same," "parallel," "orthogonal," "along," and "upper and lower," in this invention include not only the thing itself, but also the concept of "approximately" meaning something close to or similar to it.

1...work cage device, 2...cage outer frame, 2a...vertical frame, 2b...lower horizontal frame, 2c...upper horizontal frame, 3...cage sheave case, 4...main rope, 5...lower work area, 6...lower work floor, 7...fall prevention equipment, 8...upper work area, 9...upper work floor, 10...scaffolding board, 11-13...fall prevention equipment, 15...protective ceiling, 20...base, 21...base body, 21a...opening, 22...dividing body, 23...connecting piece, 24...leg, 25...upper leg, 26...lower leg, 27...bracket, 28-31...engagement portion (shaft portion), 32...lid panel, 32a...notch, 32b...slit, 35...extension panel (telescopic extension panel), 36 ...First panel, 36a...slide slot, 36b...hole, 37...second panel, 37a...rivet nut, 38...bracket, 38a...engagement portion (hook portion), 39...arm, 39a...engagement portion (hook portion), 40...extension panel (non-telescopic extension panel), 41...panel, 41a...hole, 42...bracket, 42a...engagement portion (hook portion), 43...arm, 43a...engagement portion (hook portion), 45...corner panel, 46...first corner panel, 46a...slide slot, 46b, 46c...rivet nut, 47...second corner panel, 47a...rivet nut, X...first direction, Y...second direction

Claims (9)

A work floor provided on the car outer frame;
A protective ceiling provided above the work floor,
The protective ceiling is
a base having a first side portion and a second side portion in a first direction and a third side portion and a fourth side portion in a second direction perpendicular to the first direction;
and one or more extension panels that are detachable from the base and selectively provided for each of the first to fourth sides of the base. The elevator working car device according to claim 1, wherein two types of extension panels are selectively provided: an extension type in which a first panel and a second panel overlapping vertically are slidably connected, and a non-extendable type consisting of only one panel. the base includes a locking portion on each of the first side portion to the fourth side portion;
The elevator working car apparatus according to claim 1 or 2, wherein the extension panel includes an engagement portion that is releasably engaged with the locking portion of the base. 3. The elevator working car device according to claim 1 or 2, wherein the base comprises an opening having a size capable of passing the parallel portion of the main rope generated by winding the main rope around the sheave, and a cover panel having a notch or slit for passing the main rope therethrough and closing the opening. The opening is circular;
5. The elevator work car device according to claim 4, wherein the cover panel is a circular plate larger than the opening and has two notches equally spaced apart in the circumferential direction. 3. The elevator working car device according to claim 1, wherein the protective ceiling is provided with a corner panel that fills a gap between end edges of two extension panels provided on two adjacent sides of the base. The elevator working car device according to claim 6, wherein the corner panels are of an extendable type in which a first corner panel and a second corner panel overlapping vertically are slidably connected. 3. The elevator working car device according to claim 1, wherein the base is provided with legs that are detachably fixed to an upper horizontal frame of an outer frame of the car. The legs include locking portions,
The extension panel includes an arm extending diagonally downward toward the leg,
The elevator work car device according to claim 8, wherein the arm is provided with an engagement portion at a tip end thereof that is capable of releasably engaging with the locking portion of the leg.

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