CN117425612A - Railing and elevator - Google Patents

Abstract

A plurality of struts of the handrail are fixed to the upper part of the elevator car. The plurality of slide posts are slidably engaged with the plurality of posts, respectively, and can protrude above the upper portions of the plurality of posts. The rail is fixed to the plurality of sliding posts. The first switch unit and the second switch unit are made unable to be turned on by interference with one of the plurality of sliding columns, i.e., the switch sliding column. In an expanded state in which the plurality of sliding posts protrude from the upper portions of the plurality of posts, the first switch portion interferes with the switch sliding post, and the second switch portion avoids interference with the switch sliding post.

Description

Railing and elevator

Technical Field

The present invention relates to a handrail (handrail) and an elevator provided with the handrail.

Background

When equipment installed in a hoistway of an elevator is overhauled, an operator sometimes performs work by boarding the upper part of an elevator car. Therefore, a handrail for ensuring the safety of the operator is provided at the upper part of the elevator car. A handrail provided at an upper portion of an elevator car is described in patent document 1, for example.

Patent document 1 discloses an upper car handrail that is disposed in a foldable manner on an upper portion of an elevator car of an elevator. The car upper handrail is provided with one side and the other side which are respectively arranged along the car side. One side portion is fixed to one arm portion disposed along one car side portion, and the other side portion is fixed to the other arm portion disposed along the other car side portion. One side portion is connected to the other arm portion in a state in which the upper handrail of the car is folded. Thus, the force generated when the door is opened and closed is received by both the one arm and the other arm.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication 2016-147727

Disclosure of Invention

Problems to be solved by the invention

However, when the car upper handrail described in patent document 1 is assembled from a folded state, it is difficult to secure a space for an operator to ride on in the upper part of the elevator car. Therefore, before the space for the operator to get on can be ensured, the assembly work of the handrail on the car needs to be performed without boarding the upper part of the elevator car, and the assembly work becomes complicated.

In view of the above, an object of the present invention is to provide a handrail that can be easily assembled in an upper portion of an elevator car, and an elevator provided with the handrail.

Means for solving the problems

In order to solve the above problems and achieve the object of the present invention, the handrail of the present invention includes a plurality of struts, a plurality of sliding struts, a handrail portion, and a first switch portion and a second switch portion. A plurality of posts are secured to an upper portion of the elevator car. The plurality of slide posts are slidably engaged with the plurality of posts, respectively, and can protrude above the upper portions of the plurality of posts. The rail is fixed to the plurality of sliding posts. The first switch unit and the second switch unit are made unable to be turned on by interference with one of the plurality of sliding columns, i.e., the switch sliding column. In an expanded state in which the plurality of sliding posts protrude from the upper portions of the plurality of posts, the first switch portion interferes with the switch sliding post, and the second switch portion avoids interference with the switch sliding post.

The elevator of the present invention further includes: an elevator car that performs a lifting operation in a lifting passage; and the handrail is arranged at the upper part of the elevator car.

Effects of the invention

According to the handrail with the above structure, the assembly work can be easily performed on the upper part of the elevator car.

Drawings

Fig. 1 is a schematic configuration diagram illustrating an elevator according to an embodiment.

Fig. 2 is a perspective view showing a contracted state of the handrail of an embodiment.

Fig. 3 is a perspective view showing an expanded state of the handrail of an embodiment.

Fig. 4 is a perspective view showing the switching section of the handrail of an embodiment.

Fig. 5 is an explanatory diagram showing the on/off of the switching unit in the contracted state of the handrail of an embodiment.

Fig. 6A and 6B are explanatory diagrams showing the on/off of the switching unit during the expansion of the handrail of an embodiment.

Fig. 7A and 7B are explanatory diagrams showing on/off of the switching unit in the expanded state of the handrail of the embodiment.

Fig. 8A and 8B are explanatory diagrams showing on/off of the switching unit during the reduction of the handrail of the embodiment.

Fig. 9 is a table showing an on/off mode of a switching unit and an operation condition of an elevator according to an embodiment.

Fig. 10 is an enlarged perspective view of the temporary fixing mechanism of the handrail of an embodiment.

Fig. 11 is an explanatory view showing the temporary fixing mechanism in the contracted state of the handrail of the embodiment.

Fig. 12 is an explanatory view showing a state in which the sliding column is temporarily fixed by the temporary fixing mechanism of the handrail of the embodiment.

Fig. 13 is an enlarged perspective view of the fixing mechanism of the handrail of an embodiment.

Fig. 14A to 14C are explanatory views showing a fixing operation by the fixing mechanism of the handrail according to the embodiment

Fig. 15 is an enlarged perspective view of the fixing mechanism in the temporarily fixed state of the handrail of an embodiment.

Fig. 16 is an enlarged perspective view of the sliding guide mechanism of the handrail of an embodiment.

Detailed Description

An elevator according to an embodiment will be described below with reference to fig. 1 to 16. In the drawings, common members are denoted by the same reference numerals.

[ Structure of Elevator ]

First, the structure of an elevator according to an embodiment of the present invention (hereinafter, referred to as "this example") will be described with reference to fig. 1.

Fig. 1 is a schematic configuration diagram showing a configuration example of an elevator according to this example.

As shown in fig. 1, the elevator 1 of the present example performs a lifting operation in a lifting passage 110 formed in a building structure. The elevator 1 includes an elevator car 120 for carrying persons and cargoes, a sling 130, a counterweight 140, and a hoist 100. The elevation passage 110 is formed in the building structure, and a machine room 160 is provided at the top thereof.

The hoisting machine 100 is disposed in the machine room 160, and winds the hoisting rope 130 to raise and lower the elevator car 120. A diverting pulley 150 is provided near the hoisting machine 100. A sling 130 is mounted on the diverting pulley 150.

The counterweight 140 is set to have substantially the same mass as the elevator car 120 when not loaded. Therefore, when no article or no person is loaded in the elevator car 120, the tension ratio of the sling 130 on the elevator car 120 side to the counterweight 140 side is 1. This can suppress the output of the hoisting machine 100 at the time of no loading to be low.

The elevator car 120 is coupled to the counterweight 140 via a sling 130, and is lifted and lowered in the hoistway 110. In addition, a handrail 200 is provided at the upper part of the elevator car 120. A control board 170 showing an example of the control unit of the present invention is disposed in the machine chamber 160. The control board 170 controls driving of the hoist 100 and controls lifting and lowering operations of the elevator car 120.

[ Structure of railing ]

Next, the structure of the handrail 200 will be described with reference to fig. 2 and 3.

Fig. 2 is a perspective view showing a contracted state of the handrail 200. Fig. 3 is a perspective view showing an expanded state of the handrail.

The handrail 200 provided at the upper portion of the elevator car 120 (see fig. 1) can be brought into a contracted state shown in fig. 2 and an expanded state shown in fig. 3. When the elevator 1 is operated normally, the handrail 200 is set in a contracted state. This makes it possible to prevent the handrail 200 from interfering with the machine room 160 of the hoistway 110. On the other hand, when maintenance and inspection are performed on the elevator 1, the handrail 200 is set in the expanded state. Thus, the operator can grasp the handrail 200 when working on the upper portion of the elevator car 120.

In fig. 2 and 3, the X-axis direction indicates the in-out direction of the elevator, the Y-axis direction indicates the width direction of the entrance of the elevator, and the Z-axis direction indicates the height direction of the elevator. The X-axis direction and the Y-axis direction correspond to two axial directions parallel to the horizontal plane, that is, horizontal biaxial directions, and the Z-axis direction corresponds to a vertical direction orthogonal to the horizontal plane. The direction of entrance and exit of the elevator corresponds to the depth direction when the elevator hoistway is viewed from the hall of the elevator, that is, the direction of entrance and exit of the elevator, and the width direction of the entrance corresponds to the direction in which the door of the elevator is opened and closed.

The handrail 200 has: a supporting unit 201 fixed to an upper portion of the elevator car 120 (refer to fig. 1); and a first movable unit 202A and a second movable unit 202B movably connected to the supporting unit 201.

(support Unit)

The supporting unit 201 has: six struts 211a, 211b, 211c, 211d, 211e, 211f, two reinforcing portions 212, 213, and a reinforcing connection portion 214 connecting the two reinforcing portions 212, 213. In addition, the support unit 201 has a column connecting portion 215 that connects the support column 211a and the support column 211 d.

The struts 211a, 211b, 211c are arranged at appropriate intervals in the X-axis direction. The struts 211d, 211e, and 211f are arranged at appropriate intervals in the X-axis direction. Hereinafter, the side of the support 211b is referred to as the deep side in the X-axis direction when viewed from the support 211a, and the side opposite to the support 211b is referred to as the near side in the X-axis direction when viewed from the support 211 a.

In the Y-axis direction, the support 211a faces the support 211d, the support 211b faces the support 211e, and the support 211c faces the support 211 f. Hereinafter, the side of the support column 211d is referred to as the right side in the Y-axis direction when viewed from the support column 211a, and the side opposite to the support column 211d is referred to as the left side in the Y-axis direction when viewed from the support column 211 a.

The support posts 211a to 211f are formed in a square tubular shape. One of the four side surfaces of each of the support columns 211a to 211f is open, and a cross section parallel to the horizontal plane is formed in a substantially C-shape. The opening surfaces of the struts 211a to 211f face the deep side in the X-axis direction.

The struts 211a to 211f extend in the Z-axis direction. A fixing member 217 is provided at a lower portion of one end of each of the support columns 211a to 211f in the Z-axis direction. The fixing members 217 of the supporting posts 211b, 211c, 211e, 211f are fixed to the upper portion of the elevator car 120.

Reinforcing base 218 is attached to fixing member 217 of each of support columns 211a and 211 d. Reinforcing table 218 is formed of a plate body bent in a substantially L-shape. The reinforcing table 218 has: a mounting plate section having a plane substantially perpendicular to the Y-axis direction; and a reinforcing plate portion having a plane substantially perpendicular to the X-axis direction.

The fixing members 217 of the supporting posts 211a, 211d are fixed to the upper portion of the elevator car 120 via the post connecting portion 215. The column connecting portion 215 is formed of a rectangular plate body long in the Y-axis direction, and side pieces standing substantially vertically from the long sides of the plate body. The struts 211a, 211d are integrally assembled using the strut connecting portion 215.

A switch unit 240A is mounted to the support column 211 a. The switching unit 240A detects the position of the first movable unit 202A in the Z-axis direction. Further, a switch unit 240B is attached to the support column 211 d. The switching unit 240B detects the position of the second movable unit 202B in the Z-axis direction. The structure of the switch units 240A, 240B will be described later with reference to fig. 4.

The post 211b is provided with a temporary fixing mechanism 270A. Further, a temporary fixing mechanism 270B is provided on the stay 211 e. Temporary fixing mechanisms 270A and 270B support slide columns 221B and 221e, which will be described later, at predetermined positions, respectively. Thereby, the first movable unit 202A and the second movable unit 202B are held at the temporary fixing positions. The structure of temporary fixing mechanisms 270A and 270B will be described with reference to fig. 10 to 12.

The reinforcing portions 212 and 213 are formed in an elongated shape extending in the X-axis direction. The reinforcement 212 is fixed to the middle part of the struts 211a, 211b, 211c in the Z-axis direction. One end portion in the X-axis direction of the reinforcement portion 212 is fixed to the stay 211a. The reinforcement portion 213 is fixed to the middle portion in the Z-axis direction of the support posts 211c, 211d, 211 f. One end portion in the X-axis direction of the reinforcement portion 213 is fixed to the stay 211c.

The reinforcing connection portion 214 is formed in an elongated shape extending in the Y-axis direction. Both ends in the Y-axis direction of the reinforcement connection portion 214 are connected to the other ends in the X-axis direction of the reinforcement portions 212 and 213, respectively.

(Movable Unit)

The first movable unit 202A is movably connected to the support posts 211a, 211b, 211c of the support unit 201. As shown in fig. 3, the first movable unit 202A includes slide columns 221a, 221b, and 221c, a side rail (side rail) portion 222, and a depth rail portion 223.

The slide posts 221a, 221b, 221c are slidably connected to the inner sides of the support posts 211a, 211b, 211 c. Thereby, the slide columns 221a, 221b, 221c move along the struts 211a, 211b, 211c in the Z-axis direction.

In the contracted state of the handrail 200, the sliding columns 221a, 221b, 221c are retracted into the supporting columns 211a, 211b, 211 c. On the other hand, in the expanded state of the handrail 200, the sliding posts 221a, 221b, 221c protrude from the upper portions of the support posts 211a, 211b, 211 c.

The sliding columns 221a, 221b, 221c are formed in a square tubular shape having a smaller quadrangle than the support column 211 a. One of the four side surfaces of the slide column 221a, 221b, 221C is opened, and a cross section parallel to the horizontal plane is formed in a substantially C-shape. The opening surfaces of the slide posts 221a, 221b, 221c face to the right in the Y-axis direction.

The side rail 222 is fixed to the upper portions of the slide posts 221a, 221b, 221 c. The side rail 222 is formed in an elongated shape extending in the X-axis direction. The upper surface of the side rail 222 is formed in a plane substantially perpendicular to the Z-axis direction. The upper surface of the side rail 222 is set to be substantially the same height as the upper ends of the slide posts 221a, 221b, 221 c. The side rail 222 faces the reinforcement 212 of the support unit 201 in the Z-axis direction.

The depth rail portion 223 is connected to an end portion of the side rail portion 222 on the depth side in the X-axis direction. Thereby, the deep fence 223 moves in the Z-axis direction together with the side fence 222. The deep fence 223 is formed in an elongated shape extending in the Y-axis direction. The upper surface of the deep fence 223 is formed as a plane substantially perpendicular to the Z-axis direction. The upper surface of the deep rail portion 223 is set to be substantially the same height as the upper surface of the side rail portion 222.

The deep fence 223 faces the reinforcement connection portion 214 of the support unit 201 in the Z-axis direction. The length of the deep fence 223 in the Y-axis direction is set to about 1/2 of the length of the reinforcing connection portion 214 in the Y-axis direction. The deep rail portion 223 has a stopper piece 223a. In the contracted state of handrail 200, stopper piece 223a abuts against the upper surface of reinforcing connection portion 214. In the expanded state of the handrail 200, the side rail portion 222 and the deep rail portion 223 are disposed at a predetermined height that is easily grasped by an operator.

The second movable unit 202B is formed symmetrically to the first movable unit 202A. That is, the second movable unit 202B has slide columns 221d, 221e, 221f, a side rail 224, and a depth rail 225. The second movable unit 202B is movably connected to the support posts 211d, 211e, 211f of the support unit 201.

The slide posts 221d, 221e, 221f are slidably connected to the inner sides of the support posts 211d, 211e, 211 f. Thereby, the slide columns 221d, 221e, 221f move along the struts 211d, 211e, 211f in the Z-axis direction. The opening surfaces of the slide posts 221d, 221e, 221f face to the left in the Y-axis direction.

In the contracted state of the handrail 200, the sliding columns 221d, 221e, 221f retract into the struts 211d, 211e, 211 f. On the other hand, in the expanded state of the handrail 200, the sliding posts 221d, 221e, 221f protrude from the upper portions of the support posts 211d, 211e, 211 f.

The side rail 224 is opposed to the reinforcing portion 213 of the supporting unit 201 in the Z-axis direction. The depth rail portion 225 moves in the Z-axis direction together with the side rail portion 224. The deep fence 225 faces the reinforcement connection portion 214 of the supporting unit 201 in the Z-axis direction. The length of the deep fence 225 in the Y-axis direction is set to about 1/2 of the length of the reinforcing connection 214 in the Y-axis direction.

In the contracted state of handrail 200, the stopper piece (not shown) of deep handrail portion 225 abuts against the upper surface of reinforcing connection portion 214. In the contracted state and the expanded state of handrail 200, deep-drawing fence portion 225 faces deep-drawing fence portion 223. That is, the left end face of the depth rail 225 in the Y-axis direction is opposed to the right end face of the depth rail 223 in the Y-axis direction.

In the contracted state and the expanded state of the handrail 200, the side rail portion 224 and the depth rail portion 225 are arranged at the same height as the side rail portion 222 and the depth rail portion 223 of the first movable unit 202A.

As shown in fig. 2, in the contracted state of the handrail 200, the upper ends of the sliding columns 221a to 221f in the first movable unit 202A and the second movable unit 202B are substantially the same height as the upper ends of the struts 211a to 211f in the supporting unit 201. In the contracted state of the handrail 200, the first movable unit 202A and the second movable unit 202B are fixed to the supporting unit 201 using a fixing mechanism 300 described later.

In order to change from the contracted state to the expanded state of handrail 200, first movable unit 202A and second movable unit 202B are moved in the Z-axis direction (upward), and side rail portions 222, 224 and deep rail portions 223, 225 are arranged at a predetermined height. Next, the first movable unit 202A and the second movable unit 202B are fixed to the supporting unit 201 using a fixing mechanism 300 described later. Thus, the railing 200 is in the expanded state shown in fig. 3.

(switch unit)

Next, the structure of the switch units 240A and 240B will be described with reference to fig. 4.

Fig. 4 is a perspective view showing the switching unit 240B of the handrail 200.

The switch units 240A, 240B are the same structure. Therefore, the configuration of the switch unit of the present invention will be described herein by taking the switch unit 240B as an example.

As shown in fig. 4, the switching unit 240B has a first switching part 251 and a second switching part 252. The first switch portion 251 and the second switch portion 252 are mounted on a switch base 219 provided on the support column 211 d. The first switch 251 is disposed above the second switch 252.

The first switch portion 251 is constituted by a normal switch 254 and a first work 255. Typically, the switch 254 and the first working member 255 are opposed in the X-axis direction. The side of the first work 255 opposite to the normal switch 254 is opposite to the slide column 221 d. The work (not shown) of the switch unit 240A faces the slide column 221 a. The slide posts 221a and 221d correspond to the switch slide posts of the present invention.

The second switch portion 252 is constituted by a maintenance switch 256 and a second work piece 257. The maintenance switch 256 and the second work piece 257 are opposed in the X-axis direction. The side of the second work piece 257 opposite the maintenance switch 256 is opposite the slide column 221 d. Typically, the switch 254 and the maintenance switch 256 are opposed to each other in the Z-axis direction. The first work pieces 255, 257 are opposed to each other in the Z-axis direction.

Typically, the switch 254 and the maintenance switch 256 are fixed to the switch base 219. Typically, the switch 254 and the maintenance switch 256 are so-called momentary switches. Normally, the switch 254 and the maintenance switch 256 are turned off when the buttons 254a and 256a are pressed, and turned on when the buttons 254a and 256a are not pressed.

The first work 255 is formed of a rectangular plate body long in the X-axis direction. The end surface 255a of the first work 255 on the normal switch 254 side faces the button 254a of the normal switch 254 in the X-axis direction. Further, an inclined surface 255b directed downward is formed on the opposite side of the first work 255 from the normal switch 254. The inclined surface 255b faces the slide column 221d through the opening surface of the support column 211 d.

The switch base 219 supports the first work 255 so as to be movable in the X-axis direction. The first work 255 can move to a first position where it does not interfere with the slide column 221d and a second position which is a position on the front side (slide column 221 d) in the X-axis direction from the first position.

When the first work 255 is disposed at the first position, the end surface 255a of the first work 255 presses the button 254a of the normal switch 254. Thus, normally the switch 254 is open. On the other hand, when the first work 255 is disposed at the second position, the end surface 255a of the first work 255 does not press the button 254a of the normal switch 254. Thus, normally the switch 254 is turned on.

The second work 257 is constituted by a rectangular plate body long in the X-axis direction. The end surface 257a of the second work piece 257 on the maintenance switch 256 side faces the button 256a of the maintenance switch 256 in the X-axis direction. Further, an upward inclined surface 257b is formed on the opposite side of the second work 257 from the maintenance switch 256. The inclined surface 257b faces the slide column 221d through the opening surface of the stay 211 d.

The switch base 219 supports the second work piece 257 so as to be movable in the X-axis direction. The second work 257 is movable to a first position where it does not interfere with the slide column 221d, and a second position which is a position on the front side (slide column 221 d) in the X-axis direction from the first position.

When the second work piece 257 is disposed at the first position, the end surface 257a of the second work piece 257 presses the button 256a of the maintenance switch 256. Thereby, the maintenance switch 256 is turned off. On the other hand, when the second work piece 257 is disposed in the second position, the end surface 257a of the second work piece 257 does not press the button 256a of the maintenance switch 256. Thereby, the maintenance switch 256 is turned on.

As shown in fig. 4, the sliding column 221d has a cutout 228. The cutout 228 is provided in the side piece of the slide column 221d exposed from the opening surface of the stay 211 d. The notch is formed in a quadrilateral shape larger than the side portion of the first work 255 where the inclined surface 255b is formed.

In the contracted state of the handrail 200, the cutout 228 is opposed to the inclined surface 255b of the first work 255. Thus, the first work 255 can be disposed at the second position without interfering with the slide column 221 d. On the other hand, when the notch 228 does not face the inclined surface 255b of the first work 255, the first work 255 interferes with the slide column 221 d. Thus, the first work 255 cannot be disposed in the second position.

(switch part in contracted state of railing)

Next, the switch unit 240B in the contracted state of the handrail 200 will be described with reference to fig. 5.

Fig. 5 is an explanatory diagram showing on/off of the switch section in the contracted state of the handrail 200.

When the elevator 1 is operated normally, the handrail 200 is set in a contracted state. As shown in fig. 5, in the contracted state of the handrail 200, it is opposed to the cutout 228 of the sliding column 221 d. Therefore, the first work 255 of the first switch portion 251 can be disposed at the second position. On the other hand, the second work 257 of the second switch 252 interferes with the slide column 221d, and thus cannot be disposed in the second position.

When the handrail 200 is in the contracted state, the first work 255 is disposed at the second position. Thus, the first working member 255 does not press the button 254a of the normal switch 254. As a result, the switch 254 is normally turned on. On the other hand, the second work piece 257 cannot be disposed in the second position, and thus the button 256a of the maintenance switch 256 is pressed. Thereby, the maintenance switch 256 cannot be turned on. Thus, the maintenance switch 256 is turned off.

(switch part during expansion of railing)

Next, the switch unit 240B during the expansion of the handrail 200 will be described with reference to fig. 6A and 6B.

Fig. 6A, 6B are explanatory diagrams showing the on/off of the switching unit 240B during the expansion of the handrail 200.

When the elevator 1 is serviced, the handrail 200 is changed from the contracted state to the expanded state. In order to bring the handrail 200 into the expanded state, the first movable unit 202A and the second movable unit 202B (see fig. 2) are raised.

When the second movable unit 202B is lifted, the slide columns 221d to 221f move upward in the Z-axis direction along the support columns 211d to 211 f. At this time, as shown in fig. 6A, the lower end of the cutout 288 in the slide post 221d presses the inclined surface 255b of the first work 255. Thereby, the first work 255 moves in a direction approaching the normal switch 254 (the depth side in the X-axis direction).

When the slide columns 221d to 221f further move upward in the Z-axis direction, as shown in fig. 6B, the notch 288 of the slide column 221d is located above the first work 255, and the tip of the first work 255 on the inclined surface 255B side contacts the side surface of the slide column 221 d. Thus, the first work 255 is disposed at the first position, and the button 254a of the normal switch 254 is pressed. As a result, the switch 254 is normally opened.

As shown in fig. 6A and 6B, the tip of the second work 257 on the inclined surface 257B side always contacts the side surface of the slide column 221d while the slide column 221d moves upward. Thus, the second work 257 does not move from the first position, and the state in which the button 256a of the maintenance switch 256 is pressed is maintained. As a result, the maintenance switch 256 does not change from off.

(switch part in expanded state of railing)

Next, the switch unit 240B in the contracted state of the handrail 200 will be described with reference to fig. 7A and 7B.

Fig. 7A and 7B are explanatory diagrams showing the on/off of the switching unit 240B in the expanded state of the handrail 200.

When the handrail 200 is in the expanded state, as shown in fig. 7A, the lower end of the sliding column 221d is located above the second work 257 of the second switch 252. Thus, the second work 257 of the second switch 252 can be disposed at the second position without interfering with the slide column 221 d. On the other hand, the first work 255 of the first switch portion 251 interferes with the slide column 221d, and thus cannot be disposed at the second position.

When the handrail 200 is in the expanded state, the second work 257 is disposed at the second position, as shown in fig. 7B. Thus, the second work piece 257 does not press the button 256a of the service switch 256. As a result, the maintenance switch 256 is turned on. On the other hand, the first work 255 cannot be disposed at the second position, and thus the button 254a of the normal switch 254 is pressed. Thus, the normal switch 254 cannot be turned on. Thus, the switch 254 is normally open.

(switch part in the process of narrowing the handrail)

Next, the switching unit 240B during the reduction of the handrail 200 will be described with reference to fig. 8A and 8B.

Fig. 8A, 8B are explanatory diagrams showing the on/off of the switching unit 240B during the reduction of the handrail 200.

When the maintenance of the elevator 1 is completed and the elevator 1 is operated normally, the handrail 200 is changed from the expanded state to the contracted state. In order to bring the handrail 200 into a contracted state, the first movable unit 202A and the second movable unit 202B (see fig. 2) are lowered.

When the second movable unit 202B is lowered, the slide columns 221d to 221f move downward in the Z-axis direction along the support columns 211d to 211 f. At this time, as shown in fig. 8A, the lower end of the slide post 221d presses the inclined surface 257b of the second work piece 257. Thereby, the second work 257 moves in a direction approaching the maintenance switch 256 (the deep side in the X-axis direction).

When the slide columns 221d to 221f move further downward in the Z-axis direction, as shown in fig. 8B, the lower end of the slide column 221d is positioned below the second work 257, and the tip on the inclined surface 257B side of the second work 257 contacts the side surface of the slide column 221 d. Thus, the second work 257 is disposed at the first position, and the button 256a of the maintenance switch 256 is pressed. As a result, the maintenance switch 256 is turned off.

As shown in fig. 8A and 8B, the tip of the first work 255 on the inclined surface 255B side always contacts the side surface of the slide column 221d while the slide column 221d moves downward. Thus, the first work 255 is not moved from the first position, and the button 254a of the normal switch 254 is maintained in a pressed state. As a result, normally the switch 254 does not change from off.

(on/off mode of switch unit and operation condition of elevator)

Next, the on/off mode of the switch unit 240B and the operation conditions of the elevator 1 will be described with reference to fig. 9.

Fig. 9 is a table showing the on/off mode of the switching unit 240B and the operation condition of the elevator 1.

As shown in fig. 9, when the normal switch 254 is on and the maintenance switch 256 is off, the handrail 200 is in a contracted state (see fig. 5). Therefore, the control board 170 (see fig. 1) can perform the normal operation of the elevator 1. On the other hand, when the normal switch 254 is off and the maintenance switch 256 is on, the handrail 200 is in the expanded state (see fig. 7B). Therefore, the control board 170 can perform maintenance operation of the elevator 1.

When the normal switch 254 and the maintenance switch 256 are on, the control board 170 disables the operation of the elevator 1. As shown in fig. 5 to 8, the condition that the normal switch 254 and the maintenance switch 256 are turned on together does not normally occur. Therefore, the control board 170 detects that an abnormality has occurred in the handrail 200 or the switching units 240A, 240B. The control board 170 reports the occurrence of the abnormality. Examples of the occurrence of the abnormality include lighting of a lamp, output of a buzzer, and display of a video or an image.

When the normal switch 254 and the maintenance switch 256 are off, the control board 170 disables the operation of the elevator 1. As shown in fig. 6B and 7A, during the expansion and contraction of handrail 200, switch 254 and maintenance switch 256 are normally opened together. The handrail 200 at this time is not in either the contracted state or the expanded state. Therefore, the control board 170 determines whether the handrail 200 is in the expanding process or the contracting process, and the operation of the elevator 1 is disabled.

(temporary fixing mechanism)

Next, the structure of temporary fixing mechanisms 270A and 270B will be described with reference to fig. 10 to 12.

Fig. 10 is a perspective view showing the temporary fixing mechanism 270B in an enlarged manner. Fig. 11 is an explanatory diagram showing temporary fixing mechanism 270B in the contracted state of handrail 200. Fig. 12 is an explanatory view showing a state in which the sliding column 221e is temporarily fixed by the temporary fixing mechanism 270B of the handrail 200.

Temporary fixing mechanisms 270A and 270B have the same structure. Therefore, the configuration of the temporary fixing mechanism of the present invention will be described herein by taking the temporary fixing mechanism 270B as an example.

As shown in fig. 10, the temporary fixing mechanism 270B includes a stopper 281 and a shaft portion 282 rotatably supporting the stopper 281. The stopper 281 is composed of a base portion 285 and a hook portion 286 continuous with the base portion 285. The shaft 282 is fixed to the hook base 220 provided on the stay 211 e.

The base portion 285 is formed of a substantially rectangular plate body. The hook 286 protrudes from one long side of the base 285. The hook portion 286 is formed of a plate body having a substantially L-shaped planar shape. The hook 286 faces the slide column 221e through the opening surface of the support column 211e (see fig. 11).

The shaft portion 282 penetrates the base portion 285 at a position above the hook portion 286. The stopper 281 is stabilized in a posture in which both long sides of the base portion 285 are substantially parallel to the Z-axis direction due to its own weight. In the contracted state of the handrail 200, the hook 286 abuts against the side surface of the slide post 221e before the two long sides of the base portion 285 are substantially parallel to the Z-axis direction. Thus, the stopper 281 stands on the side surface of the slide column 221e in a posture in which both long sides of the base portion 285 are inclined with respect to the Z-axis direction.

As shown in fig. 11, in the contracted state of the handrail 200, the hook 286 of the stopper 281 abuts against the side surface of the sliding column 221 e. When the handrail 200 is changed from the contracted state to the expanded state, the second movable unit 202B is lifted, and the sliding column 221e moves upward in the Z-axis direction along the support column 211e while contacting the hook 286.

As shown in fig. 12, when the lower end of the slide column 221e moving upward in the Z-axis direction is located above the hook 286, the hook 286 rotates by its own weight to assume a stable posture. Thereby, the hook 286 supports the lower end of the sliding column 221 e. As a result, the second movable unit 202B is temporarily fixed.

To release the temporary fixation of the second movable unit 202B, the slide column 221e is moved to a position above the temporary fixation position. Thereby, the hook 286 is disengaged from the slide post 221e. Next, the stopper 281 is rotated to move the hook 286 away from the slide post 221e. Thereby, the temporary fixation of the second movable unit 202B is released.

When the temporary fixation of the second movable unit 202B is released, the stopper 281 may be rotated until the hook 286 is positioned above the shaft 282, and the base 285 may be brought into contact with the side surface of the slide post 221e. Thus, the stopper 281 cannot return to a stable posture due to its own weight, and the hand can be moved away from the stopper 281 when the slide column 221e is moved downward. Further, a convex portion may be provided on a side surface of the slide column 221e, and may contact the base portion 285 when the slide column 221e moves downward. Thereby, the stopper 281 rotates, and the hook 286 can return to a state (state shown in fig. 10) where it contacts the side surface of the slide post 221e at a position lower than the shaft 282.

(fixing mechanism)

Next, the structure of the fixing mechanism 300 will be described with reference to fig. 13.

Fig. 13 is a perspective view showing the fixing mechanism 300 in an enlarged manner.

The fixing mechanisms 300 are each provided with a set of a pillar and a slide pillar. That is, the handrail 200 is provided with six fixing mechanisms 300. Here, the fixing mechanism 300 provided in the group of the stay 211d and the slide column 221d will be described as an example.

As shown in fig. 13, the fixing mechanism 300 includes a bolt 301, a weld nut 302 screwed to the bolt 301, and an engagement portion 303 for engaging the distal end portion of the bolt 301. A bolt 301 and a weld nut 302 are mounted to the post 211d. The fitting portion 303 is attached to the slide column 221d.

As shown in fig. 13, the stay 211d has a left side plate 401 forming a left side surface in the Y-axis direction, a right side plate 402 forming a right side surface in the Y-axis direction, and a near side plate 403 forming a near side surface in the X-axis direction. The slide column 221d includes a right side plate 412 forming a right side surface in the Y-axis direction, a near side plate 413 forming a near side surface in the X-axis direction, and a depth side plate 414 forming a depth side surface in the X-axis direction.

The weld nut 302 is welded to the left side plate 401 of the stay 211d. The bolt 301 is screwed with the weld nut 302, and penetrates the left side plate 401 of the stay 211d. The head of the bolt 301 is disposed outside the stay 211d. The front end portion of the bolt 301 on the opposite side of the head is disposed inside the stay 211d, and faces the right side plate 412 of the slide column 221d.

The fitting portion 303 is fixed to the right side plate 412 of the slide column 221 d. The fitting portion 303 is formed of a quadrangular plate body. One plane of the fitting portion 303 abuts against the inner surface of the right side plate 412. The fitting portion 303 has a bolt fitting hole 303a into which the distal end portion of the bolt 301 is fitted (see fig. 15). The diameter of the bolt fitting hole 303a is slightly larger than the diameter of the front end portion of the bolt 301.

(fixing work by fixing mechanism)

Next, a fixing operation by the fixing mechanism 300 will be described with reference to fig. 14A to 14C and 15.

Fig. 14A is a diagram showing a state in which second movable unit 202B is fixed by fixing mechanism 300 in the contracted state of handrail 200. Fig. 14B is a diagram showing a state in which the fixing mechanism 300 is released from the fixing to the second movable unit 202B. Fig. 14C is a diagram showing a state in which the second movable unit 202B is fixed by the fixing mechanism 300 in the expanded state of the handrail 200. Fig. 15 is an enlarged perspective view of the fixing mechanism 300 in the temporarily fixed state of the handrail 200.

First, the fixing of second movable unit 202B in the contracted state of handrail 200 will be described. As shown in fig. 14A, in the contracted state of the handrail 200, the tip end portion of the bolt 301 in the fixing mechanism 300 is pressed against the right side plate 412 of the slide column 221 d. Thereby, the movement of the slide column 221d (second movable unit 202B) in the Z-axis direction is locked. As a result, in the contracted state of the handrail 200, the sliding column 221d (the second movable unit 202B) is fixed.

When the handrail 200 is changed from the contracted state to the expanded state, as shown in fig. 14B, the pressing of the sliding column 221d by the bolt 301 of the fixing mechanism 300 is loosened. Thereby, the slide column 221d (second movable unit 202B) can move in the Z-axis direction. Since the bolt 301 is screwed with the weld nut 302, the bolt is loosely pressed without being separated from the stay 211 d. Then, the slide column 221d (second movable unit 202B) is moved upward in the Z-axis direction.

When the handrail 200 is in the expanded state, the bolt fitting hole 303a of the fitting portion 303 fixed to the slide column 221d is opposed to the tip end portion of the bolt 301. Next, the distal end portion of the bolt 301 is fitted into the bolt fitting hole 303 a. Thereby, the movement of the slide column 221d (second movable unit 202B) in the Z-axis direction is locked. As a result, in the expanded state of the handrail 200, the sliding column 221d (the second movable unit 202B) is fixed.

In the case of making the handrail 200 an expanded state, the sliding column 221d (second movable unit 202B) is supported by the stopper 281 of the temporary fixing mechanism 270B, and is thereby temporarily fixed. The position in the Z-axis direction of the slide column 221d (second movable unit 202B) which is formally fixed by the fixing mechanism 300 in the expanded state is set to a position higher than the position at which the slide column 221d (second movable unit 202B) is temporarily fixed.

As shown in fig. 15, in a state where the slide column 221d (second movable unit 202B) is temporarily fixed, the bolt fitting hole 303a of the fitting portion 303 is located below the tip end portion of the bolt 301. Therefore, the slide column 221d (second movable unit 202B) cannot be fixed in a temporary fixed position by the fixing mechanism 300.

As shown in fig. 15, in a state where the slide column 221d (the second movable unit 202B) is temporarily fixed, the lower end of the slide column 221d is positioned below the second work 257 of the second switch 252. Thus, the second work 257 interferes with the depth side plate 414 of the slide column 221d, and cannot be disposed at the second position. As a result, the maintenance switch 256 cannot be turned on. Therefore, the maintenance operation of the elevator 1 cannot be performed in a state where the slide column 221d (the second movable unit 202B) is temporarily fixed.

As shown in fig. 13, in a state where the slide column 221d (second movable unit 202B) is formally fixed by the fixing mechanism 300, the lower end of the slide column 221d is located above the second work 257 of the second switch 252. Thus, the second work 257 does not interfere with the deep side plate 414 of the slide column 221d, and can be disposed at the second position. As a result, the maintenance switch 256 can be turned on. Therefore, when the sliding column 221d (the second movable unit 202B) is permanently fixed and the handrail 200 is in the expanded state, the maintenance operation of the elevator 1 can be performed.

(sliding guide mechanism)

Next, the slide guide mechanism 320 of the first movable unit 202A and the second movable unit 202B will be described with reference to fig. 16.

Fig. 16 is a perspective view showing the sliding guide 320 of the handrail 200 in an enlarged manner.

The slide guide mechanisms 320 are each provided with a set of a pillar and a slide pillar. That is, the handrail 200 is provided with six sliding guide mechanisms 320. Here, the slide guide mechanism 320 provided in the group of the stay 211d and the slide column 221d will be described as an example.

As shown in fig. 16, the slide guide mechanism 320 includes a slit 331 provided in the stay 211d, and an engagement pin 332 attached to the slide post 221 d. The slit 331 is formed in the right side plate 402 of the stay 211 d. The slit 331 extends in the Z-axis direction.

The engagement pin 332 is fixed to the right side plate 412 of the slide column 221 d. The engagement pin 332 is movably engaged with the slit 331. The engagement pin 332 has a shaft portion penetrating the slit 331 of the stay 211d and a head portion disposed outside the stay 211 d. The head of the engagement pin 332 is formed in a disk shape having a diameter longer than the length of the slit 331 in the width direction.

In the contracted state of handrail 200, engagement pin 332 engages the lower end of slit 331. In this way, in the contracted state of the handrail 200, the movement of the slide column 221d downward in the Z-axis direction is locked. In the expanded state of the handrail 200, the engagement pin 332 engages with the upper end of the slit 331. In this way, in the expanded state of the handrail 200, the movement of the sliding column 221d upward in the Z-axis direction is locked.

By providing the slide guide mechanism 320 described above, the rocking of the slide columns 221a to 221f can be suppressed when the first movable unit 202A and the second movable unit 202B are moved in the Z-axis direction. As a result, the first movable unit 202A and the second movable unit 202B can be smoothly moved in the Z-axis direction.

In the present embodiment, a slit 331 is provided in the stay 211d, and an engagement pin 332 is attached to the slide column 221 d. However, the slide guide mechanism of the present invention may be configured such that a slit is provided in the slide column and an engagement pin is attached to the column.

As described above, the handrail 200 of the present embodiment includes the plurality of support posts 211a to 211f, the plurality of slide posts 221a to 221f, the side rail portion 222, the deep rail portion 223 (rail portion), the first switch portion 251, and the second switch portion 252. The plurality of supporting posts 211a to 211f are fixed to the upper portion of the elevator car 120. The plurality of slide posts 221a to 221f are slidably engaged with the plurality of support posts 211a to 211f, respectively, and can protrude above the upper portions of the plurality of support posts 211a to 211 f. The side rail 222 and the depth rail 223 are fixed to the plurality of slide posts 221a to 221f. The first switch portion 251 and the second switch portion 252 are made unable to be turned on by interference with a slide column 221d (switch slide column) that is one of the plurality of slide columns 221a to 221f. In an expanded state in which the plurality of slide posts 221a to 221f protrude from the upper portions of the plurality of support posts 211a to 211f, the first switch portion 251 interferes with the slide post 221d that is one of the plurality of slide posts 221a to 221f, and the second switch portion 252 avoids interference with the slide post 221 d. Thereby, the handrail 200 can be easily assembled in the expanded state. As a result, the assembling work of the handrail 200 can be easily performed on the upper portion of the elevator car 120. And, the expanded state of the handrail 200 can be easily detected.

In addition, in the contracted state in which the plurality of sliding columns 221a to 221f are contracted into the plurality of support columns 211a to 211f, the first switch portion 251 avoids interference with the sliding column 221d (switch sliding column), and the second switch portion 252 interferes with the sliding column 221 d. This makes it possible to easily detect the contracted state of the handrail 200.

The first switch portion 251 is disposed above the second switch portion 252, and the slide column 221d (switch slide column) has a cutout 288 that prevents interference with the first switch portion 251 in a contracted state. Thus, the sliding column 221d in the contracted state can easily realize a structure that does not interfere with the first switch portion 251.

The first switch portion 251 includes a normal switch 254 and a first work 255 that moves in a direction orthogonal to the vertical direction to press the normal switch 254. The first work 255 has an inclined surface 255b, and the inclined surface 255b contacts a slide column 221d (switch slide column) that rises from the contracted state. Accordingly, by raising the slide column 221d, the first work 255 can be moved to a position where it does not interfere with the slide column 221 d. Further, by raising the slide column 221d, the normal switch 254 can be pressed.

In the expanded state, the lower end of the sliding column 221d (switch sliding column) is located above the second switch portion 252. This makes it possible to easily realize a structure in which the sliding post 221d in the expanded state does not interfere with the second switch portion 252.

The second switch 252 includes a maintenance switch 256 and a second work 257 that moves in a direction perpendicular to the vertical direction to press the maintenance switch 256. The second work 257 has an inclined surface 257b, and the inclined surface 257b contacts the lower end of the sliding column 221d (sliding column for switch) which is lowered from the expanded state. Thus, by raising the slide column 221d, the second work 257 can be moved to a position where it does not interfere with the slide column 221 d. Further, by lowering the slide column 221d, the maintenance switch 256 can be pressed.

Further, the temporary fixing mechanism 270B is provided to support at least one (the slide column 221 e) of the plurality of slide columns 221a to 221f that rise from the contracted state to the temporary fixing position. The positions of the plurality of sliding columns 221a to 221f in the vertical direction in the expanded state are set to be higher than the positions of the plurality of sliding columns 221a to 221f arranged in the temporary fixing position in the vertical direction. Thereby, at the temporary fixing position, the second switch portion 252 cannot avoid interference with the slide column 221 d. As a result, when the plurality of slide columns 221a to 221f are at the temporary fixing positions, the expanded state can be not detected. Therefore, the elevator 1 can be kept from maintenance operation while the plurality of slide columns 221a to 221f are temporarily fixed.

The temporary fixing mechanism 270B includes a stopper 281 rotatably connected to at least one of the plurality of support columns 211a to 211f (support column 211 e). The stopper 281 supports the lower end of at least one of the plurality of sliding columns (the stay 211 e). This makes it possible to temporarily fix the plurality of slide posts 221a to 221f with a simple structure.

The stopper 281 is stabilized in a posture in which it supports at least one of the plurality of slide columns 221a to 221f (the support column 211 e) by its own weight. Accordingly, the stopper 281 can be easily brought into a posture of supporting the slide column 221e by moving the plurality of slide columns 221a to 221f upward above the stopper 281. As a result, the plurality of slide columns 221a to 221f can be temporarily fixed easily.

At least one of the plurality of support posts 211a to 211f has a slit 331 extending in the Z-axis direction (up-down direction). The slide column engaged with at least one of the plurality of support columns 211a to 211f has an engagement pin 332 engaged with the slit 331. This can suppress the wobbling of the slide posts 221a to 221 f. As a result, the sliding columns 221a to 221f can be smoothly moved in the Z-axis direction.

The elevator 1 of the present embodiment includes an elevator car 120 that moves up and down in the hoistway 110, a control board 170 (control unit) that controls the movement of the elevator car 120, and the handrail 200 described above that is provided on the upper portion of the elevator car 120. Thus, when maintenance and repair of the elevator 1 are performed, the assembly work of the handrail 200 can be easily performed on the upper portion of the elevator car 120.

In addition, in the contracted state in which the plurality of sliding columns 221a to 221f are contracted into the plurality of support columns 211a to 211f, the first switch portion 251 avoids interference with the sliding column 221d (switch sliding column), and the second switch portion 252 interferes with the sliding column 221 d. This makes it possible to easily detect the contracted state of the handrail 200.

The control board 170 (control unit) allows normal operation when the first switch 251 is on and the second switch 252 is off. When the first switch 251 is turned off and the second switch 252 is turned on, the maintenance operation, which is the operation at the time of maintenance work, is allowed. Thus, when the handrail 200 is detected to be in the contracted state, the normal operation of the elevator 1 can be performed. When the handrail 200 is detected to be in the expanded state, maintenance operation of the elevator 1 can be performed.

When the first switch 251 and the second switch 252 are on, the control board 170 (control unit) detects that an abnormality has occurred in the handrail 200. Thus, when the first switch 251 and the second switch 252 have a malfunction, the malfunction can be detected, and the operation of the elevator 1 can be stopped. As a result, the elevator 1 can be safely operated.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the gist of the invention described in the claims.

In the above embodiment, the first movable unit 202A and the second movable unit 202B are provided. However, as the handrail of the present invention, the first movable unit 202A and the second movable unit 202B may be integrally joined. In the present embodiment, since the movable units are divided into the first movable unit 202A and the second movable unit 202B, the operator can easily lift each of the movable units 202A and 202B by one person when the handrail 200 is in the contracted state or the expanded state.

For example, the first movable unit 202A is integrally joined to the second movable unit 202B such that the length of the handrail 200 in the Y-axis direction is longer than the length of the operator for spreading both arms. In this case, the movable unit is lifted up by gripping the side rail portion 222 (see fig. 2) or the side rail portion 224. As a result, it is difficult to raise the movable unit in the Z-axis direction with good balance. Further, when the first movable unit 202A and the second movable unit 202B are integrally joined, the weight that can be lifted by one operator may be equal to or more, and workability of the assembly work may be deteriorated.

In the above embodiment, the first work 255 and the second work 257 are manually moved to the second position (the position where the push switch is turned on). However, as the switch portion of the present invention, a biasing member for biasing the work 255, 257 toward the second position side may be provided. In this case, when the handrail 200 is in the contracted state, the first work 255 is automatically placed in the second position, and normally the switch 254 is turned on. When the handrail 200 is in the expanded state, the second work 257 is automatically placed in the second position, and the maintenance switch 256 is turned on. As the urging member for urging the work 255, 257, for example, a tension coil spring can be used.

In the above embodiment, the stopper 281 is stabilized in the posture of supporting the slide column 221e by its own weight. However, as the temporary fixing mechanism of the present invention, a biasing member that biases the stopper 281 to a posture supporting the slide column 221e may be provided. As the urging member for urging the stopper 281, for example, a torsion coil spring can be used.

In the above embodiment, one fixing mechanism 300 is provided for each group of the strut and the slide column. However, the number of fixing mechanisms of the present invention can be set appropriately as long as the first movable unit 202A and the second movable unit 202B can be fixed in the contracted state and the expanded state of the handrail 200. The number of temporary fixing mechanisms of the present invention can be appropriately set.

In the above embodiment, one slide guide mechanism 320 is provided for each of the groups of the column and the slide column. However, as the slide guide mechanism of the present invention, at least one of the first movable unit 202A and the second movable unit 202B may be provided.

In the present specification, terms such as "parallel" and "orthogonal" are used, but these terms are not limited to the strict terms such as "parallel" and "orthogonal", and may be "substantially parallel" and "substantially orthogonal" including "parallel" and "orthogonal" and within a range where the functions thereof can be exhibited.

Reference numerals illustrate:

elevator, 100, hoist, 110, hoistway, 120, elevator car, 130, sling, 140, counterweight, 150, diverting pulley, 160, machinery room, 170, control base, 200, handrail, 201, support unit, 202A, first movable unit, 202B, second movable unit, 211 a-211 f, strut, 219, switch base, 220, hook base, 221 a-221 f, sliding post, 222, 224, side rail, 223, 225, deep rail, 240A, 240B, switch unit, 251, first switch portion, a second switch part, 254, a normal switch, 255, a first work piece, 255a, an end face, 255B, an inclined face, 256, a maintenance switch, 257, a second work piece, 257a, an end face, 257B, an inclined face, 270A, 270B, 281, 282, shaft portion, 285, base portion, 286, hook portion, 300, fixing mechanism, 301, bolt, 302, welding nut, 303, fitting portion, 303a, bolt fitting hole, 320, slide guide mechanism, 331, slit, 332.

Claims (14)

1. A handrail, wherein the handrail comprises a handrail body,

the handrail is provided with:

a plurality of posts fixed to an upper portion of the elevator car;

a plurality of slide posts slidably engaged with the plurality of posts, respectively, and capable of protruding above the upper portions of the plurality of posts;

a rail portion fixed to the plurality of slide columns; and

a first switch unit and a second switch unit which are made unable to be turned on by interference with one of the plurality of sliding columns, i.e., the switch sliding column,

in an expanded state in which the plurality of sliding columns protrude from upper portions of the plurality of struts, the first switch portion interferes with the switch sliding column, and the second switch portion avoids interference with the switch sliding column.

2. The handrail of claim 1, wherein,

in the contracted state in which the plurality of sliding columns are contracted to the plurality of columns, the first switch portion avoids interference with the switch sliding column, and the second switch portion interferes with the switch sliding column.

3. The handrail of claim 2, wherein,

the first switch part is arranged above the second switch part,

the switch slide column has a cutout that avoids interference with the first switch portion in the contracted state.

4. The handrail of claim 3, wherein,

the first switch part has a first switch and a first work piece moving in a direction orthogonal to the up-down direction to press the first switch,

the first working member has an inclined surface that contacts the switch slide column that rises from the contracted state.

5. The handrail of claim 3, wherein,

in the expanded state, the lower end of the switch slide column is located above the second switch portion.

6. The handrail of claim 5, wherein,

the second switch part is provided with a second switch and a second working piece which moves in a direction orthogonal to the up-down direction to press the second switch,

the second working member has an inclined surface that contacts a lower end of the switch slide post that descends from the expanded state.

7. The handrail of claim 2, wherein,

the handrail is provided with a temporary fixing mechanism for supporting at least one of the sliding columns which is raised from the contracted state to a temporary fixing position,

the vertical position of the plurality of sliding columns in the expanded state is set to be higher than the vertical position of the plurality of sliding columns arranged at the temporary fixing position.

8. The handrail of claim 7, wherein,

the temporary fixation mechanism has a stopper rotatably connected with at least one of the plurality of struts,

the stopper supports a lower end of at least one of the plurality of sliding columns.

9. The handrail of claim 8, wherein,

the stopper is stabilized in a posture of supporting at least one of the plurality of sliding columns by its own weight.

10. The handrail of claim 1, wherein,

at least one of the plurality of support posts and one of the sliding posts engaged with the at least one of the plurality of support posts have a slit extending in the up-down direction,

at least one of the plurality of struts and the other of the sliding struts engaged with the at least one of the plurality of struts have an engagement pin engaged with the slit.

11. An elevator, wherein,

the elevator is provided with:

an elevator car that performs a lifting operation in a lifting passage;

a control unit that controls the lifting operation of the elevator car; and

a handrail arranged at the upper part of the elevator car,

the handrail is provided with:

a plurality of posts fixed to an upper portion of the elevator car;

A plurality of slide posts slidably engaged with the plurality of posts, respectively, and capable of protruding above the upper portions of the plurality of posts;

a rail portion fixed to the plurality of slide columns; and

a first switch unit and a second switch unit which are made unable to be turned on by interference with one of the plurality of sliding columns, i.e., the switch sliding column,

in an expanded state in which the plurality of sliding columns protrude from upper portions of the plurality of struts, the first switch portion interferes with the switch sliding column, and the second switch portion avoids interference with the switch sliding column.

12. The elevator according to claim 11, wherein,

in the contracted state in which the plurality of sliding columns are contracted to the plurality of columns, the first switch portion avoids interference with the switch sliding column, and the second switch portion interferes with the switch sliding column.

13. The elevator according to claim 12, wherein,

the control unit allows a normal operation when the first switch unit is on and the second switch unit is off, and allows a maintenance operation, which is an operation when a maintenance operation is performed when the first switch unit is off and the second switch unit is on.

14. The elevator according to claim 12, wherein,

the control unit detects that an abnormality has occurred in the handrail when the first switch unit and the second switch unit are on.