JP2003321174A - Working fence of elevator car - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve safety of a worker and restrain costs from increasing by enlarging a working space on a top face of a ceiling board of an elevator car. <P>SOLUTION: This working fence 11 positioned above an elevator car 12 is equipped with a plurality of holding members 18 arranged and fixed to both side plates 15, 15 and a back plate 16 of the elevator car 12 along upward and downward directions; and respective posts 19, 19, 20 shrinkably held in the holding members 18 in the upward and downward directions. Guard rail parts 21, 21, 22 are connected with top ends of the respective posts, and a restriction mechanism 23 is installed for positioning and restraining top and bottom positions of the posts relative to the holding members, respectively. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a work fence provided for ensuring the safety of a worker who works on the upper surface of a ceiling plate of an elevator cage.

[0002]

2. Description of the Related Art As is well known, in order to perform elevator installation work, maintenance inspection work, and the like, in general, an operator often rides on the top surface of the ceiling plate of a cage, and therefore the operator's ride In order to prevent accidents such as dropping from the upper surface of the basket into the elevator hoistway and contact between workers and various equipment installed in the hoistway, the upper surface of the cage is used for work. There is a fence.

As such a conventional work fence 1 for a cage, for example, one fixed to the upper surface 3a of the ceiling plate 3 of the cage 2 as shown in FIG. For example, there is a ceiling plate 3 of the basket 2 which is foldably provided above the upper surface 3a.

Briefly speaking, first, the cage 2 will be briefly described. The cage 2 has a box shape as shown in FIG. 8, and a slide door 4 that opens to the left and right is provided on the front side. In addition, a plurality of substantially rectangular tubular reinforcing members 6 are fixed to the outer surfaces of the left and right side plates 5 and 5 at predetermined intervals in the vertical direction and in the front-rear direction. Further, a substantially U-shaped cage frame member 7 arranged from the outside of the side plates 5 and 5 to above the ceiling plate 3 is attached to a substantially central position of the cage 2 in the front-rear direction. A number of devices such as elevator control devices 8a and 8b, blowers, various cables, safety switches, and emergency batteries are arranged and fixed at the front and rear positions of the upper surface 3a of the ceiling plate 3 of the carriage 2.

The work fence 1 is formed in a substantially U-shape in the circumferential direction of the upper surface 3a of the ceiling plate 3, and has rectangular frame portions 9 and 9 which are long in the front-rear direction on the left and right sides, and the both frames. Part 9, 9
And a rectangular rear side frame portion 10 between the rear end portions, and the U-shaped base portions 9a, 9a of the respective frame portions 9, 9, 10,
10a is fixed on the upper surface 3a of the ceiling plate 3 by bolts or the like.

On the other hand, the foldable work fence 1 shown in FIG.
Is formed into a substantially U-shape as a whole, but the frame portions 9 and 9 on both sides and the rear frame portion 10 are separately configured, and each of the base portions 9a, 9a and 10a has a hinge (not shown). It is formed so as to be foldable inwardly with respect to each other. Therefore, when in use, the frame parts 9, 9, 10 are raised to maintain their standing postures by a predetermined connecting tool, while when not in use, the connection of the frame parts 9, 9, 10 is released as shown. Then, they are folded inward with respect to each other.

This makes it possible to deal with the case where the distance from the upper surface of the ceiling plate 3 of the cage 2 to the top of the hoistway is short when the cage 2 is located on the top floor of the hoistway. .

[0008]

By the way, when the work fence 1 is attached to the upper surface 3a of the ceiling plate 3 of the cage 2 as described above, particularly, the operator and the controller installed in the hoistway, etc. In order to prevent accidents such as contact with other equipment, the thickness of the side plates 5 and 5 of the basket 2 and the wall plates constituting the back plate and the reinforcing members 6 of the side plates 5 and 5 are mounted on the work fence 1. It is installed so that it will fit within the horizontal projection plane of the cage 2, but the specifications of the elevator cage 2, such as the size, shape, and structure, differ depending on the specifications of the building in which the elevator is installed. Ceiling board top surface 3 of the cage 2
The installation location of devices such as the control devices 8a and 8b provided in a also changes.

Therefore, depending on the specifications of the cage 2, the control devices 8a, 8b, etc. may be a constraint in securing a space for installing the work fence 1, and conversely, the work fence 1 may be controlled. This is a restriction on the installation of the devices 8a and 8b.

Further, since the work fence 1 and the control devices 8a and 8b are installed on the ceiling board upper surface 3a of the cage 2, especially when the cage 2 is small, the ceiling board upper surface 3a is formed.
Is greatly restricted, which makes it difficult to secure a working space for the worker.

Further, since the foldable work fence 1 has a structure in which each frame 9, 9, 10 is raised or folded inward when it is in use or not in use. The folding structure becomes complicated, and the manufacturing cost is inevitably increased.

[0012]

The present invention has been devised in view of the actual situation of each of the conventional work fences, and the invention according to claim 1 is in the circumferential direction of the ceiling plate upper surface of an elevator cage. In a work fence having a plurality of pillars, the pillars of the work fence are arranged along the vertical direction on the outer surface of the side plates or the back plate that constitutes the peripheral wall of the elevator cage. The feature is that it is provided.

Therefore, according to the present invention, the entire work fence including the columns is not directly installed on the upper surface of the ceiling plate of the cage, but is attached to the outer surface of each side plate or the rear plate to provide the ceiling. Since it is formed so as to project above the upper surface of the board, it is possible to secure a large working space on the upper surface of the ceiling board.

According to the second aspect of the present invention, since the handrails are connected between the adjacent columns, it goes without saying that the joint rigidity between the columns is increased, and the handrails work. The safety inside becomes higher.

According to the third aspect of the invention, a plurality of holding members are fixed to the outer surfaces of both side plates or the back plate of the elevator cage, and the support columns are vertically expandable and contractable on the respective holding members. Therefore, when not in use, each column can be pushed down via the holding member and housed at the same position as or lower than the upper surface of the ceiling plate.

Since each holding member is fixed to the both side plates or the back plate, each holding member can be used as a reinforcing member for the both side plates or the back plate.

According to the invention described in claim 4, since the regulating member for regulating the vertical position of each of the columns with respect to each of the holding members is provided, the height of each column is arbitrarily adjusted according to the work content. can do.

According to the fifth aspect of the present invention, each of the support columns is provided in double inside and outside, and the second support column in which the inner first support column is slidably held in the vertical direction is vertically moved to each of the holding members. Since the first handrail part is freely connected and the first handrail part is connected between the adjacent first support parts, the second handrail part is connected to the upper end part of the second support part which is located above the ceiling plate. The joint rigidity between the members is increased, and the safety of the worker is further increased.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a work fence for an elevator cage according to the present invention will be described in detail below with reference to the drawings.

That is, FIGS. 1 and 2 show a work fence 11 according to a first embodiment of the present invention. First, a cage 12 on which the work fence 11 is installed will be briefly described. Similarly, a box-shaped bottom plate (not shown) that constitutes the bottom wall, a ceiling plate 13 that constitutes the ceiling wall, left and right sliding doors 14 provided on the front side, and left and right side plates that constitute both side walls 15, 15 and a back plate 1 which is a rear end wall
And the upper surface 13 of the ceiling plate 13
In a, a plurality of devices such as control devices 17a and 17b are provided.

On the other hand, the work fence 11 is accommodated in the holding members 18 and a plurality of holding members 18 arranged and fixed to the side plates 15 and 15 and the back plate 16 of the cage 12 along the vertical direction. And the support plates 19 and 19 on the both side plates 15 and 15 and the back plate 1 which are held in a vertically expandable and contractible manner.
6 side columns 20, handrails 21, 21, 22 coupled to the upper ends of the columns 19, 19, 20 and the vertical positions of the columns 19, 19, 20 to the holding member 18. It is constituted by a regulating mechanism 23 for regulating the positioning.

Each of the holding members 18 has side plates 15 and 15
Four pieces are fixed to the rear plate 16 and the rear plate 16 at equal intervals in the circumferential direction by welding or the like, and each is formed to have a substantially rectangular cross section, and each upper end portion 18a of the upper surface 13a of the ceiling plate 13 is formed. The lower end portion 18b is set to a position slightly lower than the height, and
Also, it extends to near the lower end of the back plate 16.

Each of the columns 19, 19 and 20 is formed to have a length shorter than about half the length of each holding member 18, and its cross section is a substantially rectangular plate shape that can be accommodated inside the holding member 18. The holding member 18 is slidable up and down.

The handrails 21, 21 and 22 are separated into the side plates 15 and 15 and the rear plate 16 side, respectively, and are formed into a single square bar shape. The length is set to connect the upper ends of the columns 19 on the side plates 15 and 15 with each other and between the columns 20 on the back plate 16 with each other. In addition, the handrails 21, 21, 2
2 is a state in which each of the columns 19, 19 and 20 is lowered and all of them are housed in each of the holding members 18 as shown in FIG.
The lower surface abuts on the upper edge of each holding member 18, and each pillar 19,
The maximum downward movement of 19, 20 is restricted.

As shown in FIG. 3, the regulating mechanism 23 is provided with a knob bolt 24 screwed and fixed in a bolt hole formed at an upper end portion of each holding member 18, and each of the columns 19, 1.
The knob bolts 24 are provided at predetermined positions of 9 and 20.
And a female screw hole 25 for regulation into which the screw is screwed. The female screw holes 25 for regulation are formed by the columns 19, 19, 20.
A plurality of holes are provided at predetermined intervals in the longitudinal direction of the.

Therefore, according to this embodiment, when an operator tries to ride on the ceiling plate upper surface 13a of the cage 12 to perform work in maintenance and inspection of the elevator,
First, an operator riding on the upper surface 13a is
Hold each 21, 22 and pull them up to a predetermined position.

Next, while the columns 19, 19 and 20 are pulled up, the knob bolts 24 are sequentially screwed into the regulating female screw holes 25 while being aligned with each other. As a result, as shown in FIG. 1, the columns 19, 19, 20 are stably and reliably fixed and held by the holding members 18 at the positions extending above the ceiling plate upper surface 13a.

As a result, the operator can see the ceiling plate upper surface 13a.
Of course, you can work safely on the above,
Since the entire work fence 11 is attached not along the ceiling plate upper surface 13a but along the outer surfaces of both side plates 15 and 15 and the back plate 16 which are outside thereof, the working space of the upper surface 13a is significantly larger than that of the conventional one. Can be expanded to.

As a result, depending on the specifications of the elevator, even if the area of the upper surface 13a is small, the maintenance and inspection work can be performed easily and the safety can be further improved.

Moreover, since the entire structure of the work fence 11 is simplified, the manufacturing workability and the assembling work of the work fence 11 are extremely easy, and the cost can be greatly reduced.

Further, each of the holding members 18 is provided on both side plates 1
Since it is fixed to 5, 5 and the back plate 16 along the up-down direction, it functions as a reinforcing member for each plate 15, 15, 16. Therefore, each plate 15, 15, 16
Of course, it is not necessary to attach a reinforcing member separately, which also improves the workability of manufacturing the elevator and is advantageous in terms of cost.

Further, since the columns 19, 19 and 20 are connected to each other by the handrails 21, 21 and 22, the joint rigidity is increased and the safety and durability of the operator are further improved. To do.

On the other hand, when the work is completed and the work fence 11 is no longer needed, the handrails 21, 2 are reversed, contrary to the above.
By loosening each knob bolt 24 while holding 1, 22, the fixing of each support column 19, 19, 20 is released. As a result, the columns 19, 19 and 20 are attached to the handrails 21 and 21, respectively.
Each holding member 1 is lowered by its own weight combined with 1, 2 and 22.
8, the handrails 21, 21 and 22 descend until they come into contact with the upper edges of the holding members 18 as shown in FIG. 2, and the entire handrails are set at a position lower than the ceiling plate upper surface 13a. Therefore, the space above the cage 12 becomes large, and the cage 1 when the cage 12 is located on the top floor is
It is also possible to apply to an elevator having a short length between the upper surface 13a of the ceiling plate 2 and the top of the hoistway.

FIG. 4 shows a second embodiment of the present invention,
In this embodiment, the cage 12 is formed to be long in the front-rear direction, and is arranged substantially at the center position of the outer periphery of the cage 12 in the front-rear direction from the outside of both side plates 15 and 15 to above the ceiling plate 13. A U-shaped cage frame member 26 is attached.

On the other hand, the work fence 11 includes the holding members 18 and
The basic configurations of the columns 19, 19, 20 and the handrails 21, 21, 22 are the same as those in the first embodiment, but are separately formed in the front and rear around the cage frame member 26, and the columns 19, 1 on both sides are formed.
The number of 9 is increased to 5, respectively, and the handrail parts 21 and 21 attached to these upper end parts are separated back and forth. Further, the left and right handrail parts 21 and 21 of the separated rear side work fence 11a are connected to the handrail part 22 on the back side by connecting members 27 and 27 at the corners.

Each of the connecting members 27, 27 is formed of a substantially triangular plate member, and both ends thereof are respectively connected to the facing end portions of the adjacent handrail portions 21, 21, 22 by bolts or the like. .

Therefore, according to this embodiment, by connecting with the connecting members 27, 27, the adjacent handrail parts 21, 21, 22 on the rear side and the columns 19, 19,
Since the rigidity of 20 is high, the rear work fence 11a
The durability is improved and the work safety is also improved.

Further, since they are connected by the connecting members 27, 27, when the work fence 11a is used,
Both side plates 15, through the handrails 21, 21, 22 on the rear side,
It is possible to move up and down together the respective rear columns 15 of the fifteen and the respective rear columns 20 of the rear plate 16 side. In this respect, it is possible to extend and retract the rear side work fence 11a in the vertical direction. It will be easier.

When the working fence 11a on the rear side is lowered, the lower surfaces of the connecting members 27, 27 are brought into contact with the corners of the upper surface 13a of the ceiling plate 13, and further lowering is restricted. It will be.

Further, the connecting members 27, 27 can be detachably attached. That is, for example, when the work fence 11 is not used, the work fence 11 is removed, the columns 19 are housed in the holding members 18, and the handrails 21 are attached to the ceiling board 1.
3 is located below the upper surface 13a. On the other hand, at the time of use, it is possible to attach the connecting members 27 to the corners in a state where the columns 19 and the handrails 21 are pulled out upwards and are held at predetermined use positions.

FIG. 5 shows a third embodiment of the present invention, in which the columns 19, 19, 20 of the work fence 1 are formed in a two-stage type.

That is, the side plates 15, 15 and the back plate 16
Each holding member 18 fixed by welding or the like is formed in a substantially cylindrical shape, and the inside and outside double columns 19a, 19b, 20a, 20b are accommodated in the inside of each holding member 18 so as to be vertically expandable and contractible. Each of the holding members 18 is fixed to each of the side plates 15 and 15 by four pieces and on the back plate 16 side by three pieces. Note that each holding member 18 may have not only a cylindrical shape but also a rectangular tube shape.

Each of the outer first columns 19a, 20a is
It has a substantially small-diameter cylindrical shape, is provided slidably in the vertical direction from the inside of the holding member 18, and has a round bar-shaped first handrail between the adjacent first support columns 19a, 19a, 20a, 20a. The parts 21a and 22a are respectively connected.
On the other hand, the inner second support columns 19b and 20b are formed in the shape of a small-diameter round bar, are provided slidably in the vertical direction inside the first support columns 19a and 20a, and are adjacent to the second support columns 19b and 19b. , 20b, 20b between the second round bar
The handrails 21b and 22b are connected to each other. Also, the second support columns 19b and 20b are the first support columns 19a,
The ceiling plate upper surface 1 in the state where it is lowered and accommodated in 20a.
The height is slightly higher than the height of 3a, and therefore the second handrail portion 21b is also configured to be slightly higher than the ceiling plate upper surface 13a.

Further, between each holding member 18 and the first and second columns 19a, 19b, 20a and 20b, there is provided a regulating mechanism 23 including a knob bolt 24 and a regulating screw hole 25 similar to those of the first embodiment. It is provided.

Therefore, according to this embodiment, the first and second support columns 19a, 19b, 20a, and
Since the height of the work fence 11 can be arbitrarily adjusted by pulling out all or one of the columns 20b upward and operating the regulation mechanism 23,
In addition to being highly practical, when the work fence 11 is not used, the second handrail portion 21b is located slightly above the ceiling plate upper surface 13a, so that the worker can use the second handrail before and after the work. Since it is possible to get on and off the upper surface 13a while being gripped by the handrail portion 21b, safety is also improved in this respect.

The restricting mechanism 23 has various structures other than the structure described above. For example, as shown in FIG. Hook portions 28, 28 that are provided and can be locked to the upper edge of each holding member 18 are provided. This hook part 2
8 and 28 are adapted to be housed in and projected from the columns 19 and 20 via wires (not shown) by the operation of the operation levers 29 and 29 rotatably supported on the lower portion of the handrail portion 21. There is.

In this embodiment, each holding member 18
However, it has flange portions 18a, 18a which are bent substantially in a U shape and are fixed to both side plates 15, 15 and the back plate 16 by welding or the like in the longitudinal direction of the edge.

Further, as shown in FIG. 7, a pair of columns 1
9 and 19 and the handrail portion 21 are bent and formed in a substantially U-shape, and locking portions 31 and 31 are provided in the upper end portions of the columns 19 and 19 so as to be retractable through a spring (not shown). .
Further, the locking portions 31, 31 are adapted to be simultaneously projected and retracted via a predetermined link member by one-touch upward operation of the operation lever 32 arranged between the upper ends of the columns 19, 19.

The present invention is not limited to the configuration of each of the above-described embodiments, but the number and cross section of the holding member 18, the columns 19, 20 and the handrail portion 21 are changed according to the size and specifications of the elevator cage 12. The shape etc. can be freely changed. The same applies to the structure of the regulation mechanism 23.

Further, the work fence 11 can be provided only on both side plates 15 and 15 side of the cage 12 or only on the back plate 16 side, and the support columns 19 and 20 can be attached to the holding member 18. Both side plates 1 without being slidably held
It is also possible to directly fix the outer surface of the back plate 5 or 15 or 15 in a standing state.

[0051]

As is apparent from the above description, claim 1
According to the invention described in (1), the entire work fence including the columns is
Rather than being installed directly on the top surface of the ceiling plate of the cage, it was attached to each side plate and back plate and formed so as to project upward from the top surface of the ceiling plate, so of course it is possible to ensure work safety. That is, it is possible to take a large working space on the top surface of the ceiling plate.

According to the second aspect of the present invention, the handrail portion connected between the adjacent support columns increases the joint rigidity between the support columns and improves the durability.
Work safety is increased.

According to the third aspect of the present invention, when the work fence is not used, each of the columns can be pushed down through the holding member and housed at the same position as or lower than the upper surface of the ceiling board. Therefore, it is possible to support an elevator having a short length from the ceiling plate of the cage to the top of the hoistway.

According to the invention described in claim 4, since each of the holding members can be used as a reinforcing member for both side plates and a back plate, parts can be shared and a cost increase can be suppressed. it can.

According to the invention described in claim 5, since the regulating member for regulating the vertical position of each of the columns with respect to each of the holding members is provided, the height of each column is arbitrarily adjusted according to the work content. can do.

According to the sixth aspect of the present invention, since the second handrail portion is connected to the upper end portion of each of the adjacent holding members located above the ceiling plate, the connection rigidity between the holding members is increased. In addition to increasing the height, it is possible to increase the safety of the worker before and after the work.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cage to which a first embodiment of a work fence according to the present invention is applied.

FIG. 2 is a perspective view of the cage showing a state in which the work fence is not used.

FIG. 3 is a perspective view of a main part of a regulation mechanism used in the same embodiment.

FIG. 4 is a perspective view of a work fence showing a second embodiment.

FIG. 5 is a perspective view of a work fence showing a third embodiment.

FIG. 6 is a perspective view of a main part showing another example of the regulation mechanism used in the present invention.

FIG. 7 is a perspective view of a main part showing still another example of the regulation mechanism.

FIG. 8 is a perspective view showing a conventional work fence.

FIG. 9 is a perspective view showing another conventional work fence.

[Explanation of symbols]

11 ... Work fence 12 ... basket 13 ... Ceiling board 13a ... upper surface 15.15 ... Both side plates 17a / 17b ... Control device 18 ... Holding member 19 ・ 20 ... Support 21 ・ 22 ... Handrail 23 ... Regulatory mechanism

Claims (5)

[Claims] 1. A work fence having a plurality of pillars arranged along a circumferential direction of a ceiling plate upper surface of an elevator cage, wherein each pillar of the work fence is provided with a peripheral wall of the elevator cage. A work fence for an elevator cage, characterized in that it is provided along the vertical direction on the outer surface of the side plates or back plate that compose it. 2. The work fence for an elevator cage according to claim 1, wherein a handrail is connected between the adjacent columns. 3. A plurality of holding members are fixed to the outer surfaces of both side plates or a back plate of the elevator cage, and each of the supporting columns is provided on each holding member so as to be vertically expandable and contractible. Item 1. A work fence for an elevator cage according to item 1 or 2. 4. The work fence for an elevator cage according to claim 3, further comprising a regulation member that regulates a vertical position of each of the columns with respect to each of the holding members. 5. Each of the support columns is provided double inside and outside, and a second support column in which an inner first support column is slidably held in a vertical direction is provided on each of the holding members so as to be vertically movable, and the adjacent first support column is provided. The first handrail part is connected between the support columns, while the second handrail part is connected to an upper end portion of the second support column located above the ceiling plate. Elevator cage work fence described in the crab.