Cage top maintenance device

Abstract

A cage top maintenance device is provided that enables a cage top station to be arranged at a handrail position on the cage near the floor surface at the top of the cage, where an operator performs maintenance on the hoistway equipment, and that does not affect the maintenance work. 【Solution means】The cage top maintenance device in this invention includes handrails 3a, 3b, 4a, 4b, 5a, 5b installed along the upper outer peripheral portion of a cage 2 that moves up and down in an elevator hoistway, a cage top station 7 to which a control cable 8 that transmits power supply or control signals to equipment provided on the cage 2 is connected, an engaging portion that supports the cage top station 7 in a fixed or movable manner, an engaged portion that is fixed to the cage top station 7 and engages with the engaging portion to support the cage top station 7 in a movable manner, and an arranging portion on which the control cable 8 that moves following the cage top station 7 when the cage top station 7 moves along a guide rail is arranged on the upper surface. It is characterized by comprising these components.

Description

Technical Field

[0001] The present invention relates to a car-top maintenance device having a handrail installed along the upper outer periphery of a car that moves up and down in an elevator hoistway, and a car-top station provided inside the handrail to which a control cable for controlling equipment provided in the car is connected.

Background Art

[0002] In a conventional machine-roomless elevator, in order to perform maintenance on a hoisting machine and a control panel installed in the hoistway from above the car, it is necessary to secure a space for maintenance inside the car handrail on the side closer to the hoisting machine and the control panel when viewed in the vertical direction (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When performing maintenance on the hoisting machine and control panel installed in the hoistway from above the car, there are regulations to ensure a predetermined distance from the working surface to the top of the hoistway from the perspective of the safety of the operator. When a car-top station is arranged above the car, when performing this maintenance, the operator works on top of the car-top station arranged on the ceiling surface. Therefore, the working surface is at a position higher by the height of the car-top station from the ceiling surface. At this time, in order to ensure the distance from the working surface to the top of the hoistway, it is necessary to raise the height of the top of the hoistway by the height of the car-top station. Therefore, there is a method of arranging the car-top station not on the floor surface above the car, but at, for example, the handrail position above the car. However, since many devices are installed above the car, the handrail positions where the car-top station can be installed are limited to the vicinity of the ceiling surface where this maintenance is performed. However, when the car-top station is arranged in the vicinity of this ceiling surface, there is a problem that it hinders the maintenance work of the operator.

[0005] This invention has been made to solve the above problems, and its object is to enable the car-top station to be arranged at the handrail position above the car close to the floor surface above the car where the operator performs maintenance on the hoistway equipment, and to provide a car-top maintenance device that does not affect the maintenance work.

Means for Solving the Problems

[0006] The car-top maintenance device in this invention includes a handrail installed along the upper outer periphery of a car that moves up and down in an elevator shaft, a car-top station to which a control cable for transmitting power supply or control signals to equipment provided on the car is connected, an engaging portion provided to extend in the longitudinal direction of one side handrail disposed on the closest side to equipment installed in the elevator shaft where maintenance is performed from above the car when viewed in the vertical direction, and that supports the car-top station in a fixed or movable manner, and an engaged portion fixed to the car-top station, engaging with the engaging portion to support the car-top station and enabling the car-top station to move along one side handrail. There is also an arranging portion provided to extend horizontally directly below the car-top station, on which a control cable that moves following the car-top station when the car-top station The engaging part via the engaged part moves along is disposed on the upper surface. This is what is characterized by this device.

Advantages of the Invention

[0007] This invention enables the car-top station to be arranged at a handrail position on the car-top close to the floor surface of the upper part of the car where an operator performs maintenance on the elevator shaft equipment, and realizes a car-top maintenance device that does not affect the maintenance work.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

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Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

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Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0009] Embodiment 1. FIG. 1 is a front view showing the normal state of the car-top maintenance device (entire) of the elevator according to Embodiment 1 of the present invention. FIG. 2 is a front view showing the maintenance position of the car-top maintenance device (entire) of the elevator according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing the fixed position of the car-top maintenance device (on the car) of the elevator according to Embodiment 1 of the present invention. FIG. 4 is a perspective view showing the maintenance position of the car-top maintenance device (on the car) of the elevator according to Embodiment 1 of the present invention. FIG. 5 is a plan view showing the arrangement of the car-top maintenance device of the elevator in FIG. 3 according to Embodiment 1 of the present invention. FIG. 6 is a plan view showing the arrangement of the car-top maintenance device of the elevator in FIG. 4 according to Embodiment 1 of the present invention. FIG. 7 is a perspective view showing a main part of the car-top station of the car-top maintenance device of the elevator in FIG. 3 according to Embodiment 1 of the present invention. FIG. 8 is a side view showing a main part of the car-top station of the car-top maintenance device of the elevator in FIG. 7 according to Embodiment 1 of the present invention. FIG. 9 is a front view (enlarged view) showing a stopper of the car-top maintenance device of the elevator in FIG. 7 according to Embodiment 1 of the present invention.

[0010] On the car 2 that moves up and down in the hoistway 1 of the elevator provided in a building or the like, there are handrails 3a, 3b, handrails 4a, 4b, handrails 5a, 5b for preventing the operator from falling while working on the car 2, and a car-top station 7 for transmitting the operation control command of the car 2 to the control panel 6 installed in the hoistway or the machine room (not shown). A control cable 8 connected to the control panel 6 is connected to the car-top station 7.

[0011] In a machine-roomless elevator, the control panel 6 and the hoisting machine 9 installed in the hoistway 1 are both maintained from above the car 2.

[0012] Maintenance of the control panel 6 and the hoist 9 installed in the hoistway 1 is carried out using the upper part of the car 2 on the side closest to the control panel 6 and the hoist 9 when viewed in the vertical direction. An operator gets into the space 20 or the space 21 arranged at the upper part of the car 2 to perform the work.

[0013] The handrails 3a and 3b are arranged on the side closest to the control panel 6 and the hoist 9 when viewed in the vertical direction. The handrails 3a and 3b are arranged apart from each other in the vertical direction.

[0014] The handrails 3a and 3b are supported by the columns 10a and 10b erected on the upper part of the car 1. Further, the handrails 3a and 3b and the columns 10a and 10b have a strength capable of withstanding the load of the upper car station 7.

[0015] The handrails 3a and 3b are in the shape of a rectangular parallelepiped with an internal cavity formed by extending in the horizontal direction. Notches 30a and 30b extending horizontally from one end to the other end are respectively formed in the vertical center part of the vertical surface on the car 2 side of the handrails 3a and 3b.

[0016] A pair of guide rollers 7a and 7b are provided on the upper car station 7. The guide rollers 7a and 7b are respectively rotatably supported by a pair of rotating shafts 70a and 70b. The rotating shafts 70a and 70b are fixed to the outer surface (hoistway 1 side) of the upper car station 7.

[0017] On the outer surface of the upper car station 7, the guide roller 7a is arranged at the upper part, and the guide roller 7b is respectively arranged at the lower part. The upper car station 7 is attached to the handrails 3a and 3b via a pair of guide rollers 7a and 7b.

[0018] The vertical interval between the handrails 3a and 3b and the vertical interval between the guide rollers 7a and 7b are arranged with their heights aligned with each other. Further, the height in the vertical direction of the inner diameter of the handrails 3a and 3b is formed slightly larger than the outer diameter of the guide rollers 7a and 7b.

[0019] Further, the vertical widths of the notches 30a and 30b are each formed to be larger than the outer diameter of the rotation shafts 70a and 70b and smaller than the outer diameter of the guide rollers 7a and 7b.

[0020] A procedure for engaging the guide rollers 7a and 7b fixed to the car upper station 7 with the handrails 3a and 3b will be described.

[0021] Insert the guide rollers 7a and 7b into the handrails 3a and 3b from the ends of the handrails 3a and 3b and engage them, and at the same time, penetrate and engage the rotation shafts 70a and 70b with the notches 30a and 30b, respectively.

[0022] When the car upper station 7 is engaged with the handrails 3a and 3b via the guide rollers 7a and 7b, the load of the car upper station 7 acts on the handrails 3a and 3b via the guide rollers 7a and 7b.

[0023] Also, at this time, the rotation shafts 70a and 70b and the notches 30a and 30b are arranged so as not to contact each other. Therefore, the load of the car upper station 7 does not act on the handrails 3a and 3b from the rotation shafts 70a and 70b.

[0024] The car upper station 7 is arranged on either the space 20 side or the space 21 side of the handrails 3a and 3b as viewed from the vertical direction. Here, the space 21 side is set as the fixed position of the car upper station 7.

[0025] On the handrail 3a, as viewed from the vertical direction, a stopper 31a for temporarily fixing or moving the car upper station 7 to the handrail 3a is provided on the opposite side of the handrail 5a.

[0026] The stopper 31a is provided with a pair of wing bolts 32a. The wing bolts 32a are arranged to penetrate the upper surface of the handrail 3a. The pair of wing bolts 32a temporarily fixes the car upper station 7 to the handrail 3a by sandwiching the guide roller 7a from both sides.

[0027] Further, when the basket upper station 7 engaged with the handrails 3a and 3b is disposed at a fixed position, the stopper 31a prevents the basket upper station 7 from dropping off from the ends of the handrails 3a and 3b.

[0028] When the basket upper station 7 is attached to the handrails 3a and 3b via the guide rollers 7a and 7b, the control cable 8 protrudes from the lower end of the basket upper station 7 and is connected.

[0029] The control cable 8 has a wide width perpendicular to the longitudinal direction and is flat with a thickness smaller than the width. That is, the control cable 8 has a shape that is difficult to bend in the width direction and can be bent in the thickness direction.

[0030] When the basket upper station 7 moves horizontally along the handrails 3a and 3b via the guide rollers 7a and 7b, the control cable 8 moves in a certain direction following the movement of the basket upper station 7.

[0031] As viewed from the vertical direction, a disposition portion 11 is provided in which the control cable 8 is disposed within the range in which the basket upper station 7 moves and directly below the basket upper station 7.

[0032] The disposition portion 11 is formed with a width slightly larger than the width of the control cable 8 and has a disposition surface 11a formed to extend in the longitudinal direction within the range in which the basket upper station 7 moves as viewed from the vertical direction.

[0033] One end of the disposition surface 11a is provided with a fixing portion 11b for fixing the control cable 8 connected to the control panel 6. The side of the control cable 8 fixed to the fixing portion 11b opposite to the basket upper station 7 is connected to the control panel 6.

[0034] Since the basket upper station 7 moves horizontally, the control cable 8 has a length including a slack portion 8a that can follow the basket upper station 7 between the basket upper station 7 and the fixing portion 11b.

[0035] The control cable 8 connected to the car-top station 7 is initially arranged hollow in a direction opposite to the fixing part 11b from the car-top station 7, bends downward by its own weight at a predetermined position, and is arranged with its direction changed toward the fixing part 11b.

[0036] The control cable 8 after changing its direction toward the fixing part 11b is arranged on the arrangement surface 11a. The portion of the control cable 8 arranged hollow becomes the slack part 8a. The slack part 8a and the control cable 8 arranged on the arrangement surface 11a are arranged overlapping each other in the vertical direction.

[0037] The slack part 8a is minimized at the position where the car-top station 7 is farthest from the fixing part 11b as viewed in the vertical direction. The slack part 8a gradually increases as the car-top station 7 approaches the fixing part 11b from the position where the car-top station 7 is farthest from the fixing part 11b, and has the maximum length and is arranged above the arrangement surface 11a at the position closest to the fixing part 11b.

[0038] In the spaces 20 and 21, there are no devices that would interfere with the work of the operator standing still to perform work. That is, as viewed in the vertical direction, there are no devices in the spaces 20 and 21 that may interfere with the maintenance work performed by the operator. The car-top station 7 is arranged inside the handrails 3a and 3b using this space 20 or space 21.

[0039] The spaces 20 and 21 are arranged inside the handrails 3a and 3b as viewed in the vertical direction. The space 20 extends and is arranged inside the car 2 in the range from a substantially middle position to one end in the longitudinal direction of the handrails 3a and 3b. The space 21 extends and is arranged inside the car 2 in the range from a substantially middle position to the other end in the longitudinal direction of the handrails 3a and 3b.

[0040] Next, the operation of the car top station 7 fixed to the handrails 3a and 3b will be described. First, the car top station 7 is arranged on the handrails 3a and 3b at a fixed position (space 21 side) when viewed from the vertical direction.

[0041] At this time, the control cable 8 connected to the car top station 7 is arranged on the space 21 side of the placement surface 11a when viewed from the vertical direction. The extra length portion 8a of the control cable 8 is arranged so as to overlap the upper side of the control cable 8 near the center of the placement surface 11a.

[0042] Since the car top station 7 is arranged on the space 21 side and the space 20 side is empty, the operator performs maintenance on the hoist 9 through the handrails 3a and 3b from the space 20 side.

[0043] Next, the car top station 7 is moved from the space 21 side to the space 20 side when viewed from the vertical direction. At this time, the operator releases the fixing of the stopper 31a and makes the car top station 7 movable, thereby moving the car top station 7 arranged on the space 21 side along the handrails 3a and 3b toward the space 20 side.

[0044] Since the car top station 7 is arranged on the space 20 side and the space 21 side is empty, the operator performs maintenance on the control panel 6 through the handrails 3a and 3b from the space 21 side.

[0045] After the maintenance is completed, the operator moves the car top station 7 from the working position to the fixed position (space 21 side) and fixes the car top station 7 with the stopper 31a.

[0046] According to Embodiment 1 as described above, the handrails 3a, 3b, 4a, 4b, 5a, 5b installed along the upper outer peripheral portion of the car 2 that moves up and down in the hoistway 1 of the elevator, and when viewed from the vertical direction, the control cable 8 that is provided inside the handrails 3a, 3b, 4a, 4b, 5a, 5b and transmits power supply or control signals to the equipment provided on the car 2 is connected to the upper car station 7, and when viewed from the vertical direction, it is provided so as to extend in the longitudinal direction of the handrails 3a, 3b on one side that is arranged on the side closest to the equipment installed in the hoistway 1 where maintenance is performed from above the car 2, and the notch portion 30a that supports the upper car station 7 in a fixed or movable manner 、3 0b, and the guide rollers 7a, 7b that are fixed to the upper car station 7, engage with the notch portions 30a, 30b to support the upper car station 7 and enable the upper car station 7 to move along the handrails 3a, 3b on one side, and are provided horizontally extending directly below the upper car station 7, and when the upper car station 7 The notches 30a, 30b via the guide rollers 7a, 7b moves along, the arrangement portion 11 on which the control cable 8 that moves following the upper car station 7 is arranged on the upper surface, are provided. As a result, it is possible to arrange the upper car station 7 on the upper handrails 3a, 3b close to the floor surface of the upper part of the car 2 where the operator performs maintenance on the hoistway equipment, and it is possible to realize an upper car maintenance device that does not affect the maintenance work.

[0047] In addition, since the handrail 3a is provided with a stopper 31a that fixes or moves the upper car station 7 to the handrail 3a, maintenance work or normal operation of the car 2 can be performed safely.

[0048] Embodiment 2. FIG. 10 is a front view showing the fixed position of the upper car maintenance device (above the car) of the elevator according to Embodiment 2 of the present invention. FIG. 11 is a front view showing the maintenance position of the upper car maintenance device (above the car) of the elevator according to Embodiment 2 of the present invention.

[0049] In the figure, the car-top maintenance device according to Embodiment 2 of the present invention will be described. In the car-top maintenance device according to Embodiment 2 of the present invention, the pair of handrails 12a and 12b are different in that when viewed from the longitudinal direction, both ends are arranged at different heights and are arranged parallel to each other and inclined. The same symbols are added to the other similar parts and the description thereof is omitted.

[0050] In Embodiment 1, after the car-top station 7 is arranged at a fixed position from the working positions of the handrails 3a and 3b, the maintenance is completed. At this time, the operator manually moves the car-top station 7 from the working position to the fixed position.

[0051] In Embodiment 2, the purpose is that the car-top station 13 is automatically arranged at a fixed position without the operator manually moving the car-top station 13.

[0052] The handrails 12a and 12b are in the shape of a rectangular parallelepiped with an internal cavity formed by extending in the horizontal direction. Notches 120a and 120b that extend horizontally from one end to the other end are respectively formed in the vertical surfaces on the car 2 side of the handrails 12a and 12b at the central part in the vertical direction.

[0053] A pair of guide rollers 13a and 13b are provided on the car-top station 13. The guide rollers 13a and 13b are respectively rotatably supported by a pair of rotating shafts 130a and 130b. The rotating shafts 130a and 130b are fixed to the outer surface (on the hoistway 1 side) of the car-top station 13.

[0054] On the outer surface of the car-top station 13, for the pair of rotating shafts 130a, one is arranged at a higher position or a lower position than the other in accordance with the inclination of the handrail 12a. Similarly, for the pair of rotating shafts 130b, one is arranged at a higher position or a lower position than the other in accordance with the inclination of the handrail 12b.

[0055] On the outer surface of the car-top station 13, the guide roller 13a is arranged at the upper part, and the guide roller 13b is arranged at the lower part respectively. The car-top station 13 is attached to the handrails 12a and 12b via a pair of guide rollers 13a and 13b.

[0056] The vertical interval between the handrails 12a and 12b and the vertical interval between the guide rollers 13a and 13b are arranged with their heights aligned with each other. Also, the vertical height at the inner diameter of the handrails 12a and 12b is formed slightly larger than the outer diameter of the guide rollers 13a and 13b.

[0057] On the handrail 12a, as viewed from the vertical direction, on the side opposite to the fixed position, a stopper 121a for temporarily fixing or moving the car-top station 13 to the handrail 12a is provided.

[0058] A pair of wing bolts 122a are provided on the stopper 121a. The wing bolts 122a are arranged to penetrate the upper surface of the handrail 12a. The pair of wing bolts 122a temporarily fix the car-top station 13 to the handrail 12a by sandwiching the guide roller 13a from both sides.

[0059] The stopper 121a can temporarily fix or move the car-top station 13 engaged with the handrails 12a and 12b to the handrails 12a and 12b when an operator performs maintenance.

[0060] Next, the operation of the car-top station 13 arranged on the handrails 12a and 12b will be described. First, the fixed position of the car-top station 13 is on the lower height side of the handrails 12a and 12b, that is, on the space 20 side.

[0061] When maintenance is completed at the fixed position of the car-top station 13 and the operator leaves the car-top station 13, the car-top station 13 is arranged at the fixed position as it is.

[0062] Next, when the operator moves the car-top station 13 from its fixed position to the space 21 side for maintenance, the stopper 121a provided on the handrail 12a is used to temporarily fix the car-top station 13 to the space 21 side.

[0063] When the maintenance at the space 21 side is completed, the operator releases the fixing state of the car-top station 13 using the stopper 121a. When the operator leaves the car-top station 13, the car-top station 13 automatically starts to move by its own weight from the space 21 side toward the fixed position side along the handrails 12a and 12b. When the car-top station 13 returns to the fixed position, it is arranged at that position.

[0064] According to the second embodiment as described above, the pair of handrails 12a and 12b are arranged such that both ends are at different heights when viewed from the longitudinal direction, and are arranged parallel to and inclined with respect to each other, so that the car-top station 13 can be automatically arranged at the fixed position without the operator moving the car-top station 13.

[0065] In addition, since the handrail 12a is provided with the stopper 121a that can fix or move the car-top station 13 to the handrail 12a, maintenance work or normal operation of the car 2 can be performed safely.

[0066] Embodiment 3. FIG. 12 is a perspective view showing the fixed position of the car-top maintenance device (on the car-top) of the elevator according to Embodiment 3 of the present invention. FIG. 13 is a perspective view showing the maintenance position of the car-top maintenance device (on the car-top) of the elevator according to Embodiment 3 of the present invention.

[0067] In the drawing, a maintenance device above the car according to Embodiment 3 of the present invention will be described. The maintenance device above the car according to Embodiment 3 of the present invention is different in that it includes an inclined surface 14a formed by extending in the longitudinal direction on the upper surface of the placement portion 14, and a roller 14b that abuts against the control cable 8 disposed on the inclined surface 14a and is movable along the inclined surface 14a together with the control cable 8. The same symbols are added to other similar parts and the description thereof is omitted.

[0068] Next, the operation of the car top station 7 disposed on the handrails 3a and 3b will be described. First, the fixed position of the car top station 7 is on the side where the height of the placement portion 14 is low, that is, on the space 20 side.

[0069] When maintenance is completed at the fixed position of the car top station 7 and the operator leaves the car top station 7, the car top station 7 is placed at the fixed position as it is.

[0070] Next, when the operator moves the car top station 7 from the fixed position to the space 21 side for maintenance, the car top station 7 is temporarily fixed to the space 21 side using the stopper 31a provided on the handrail 3a.

[0071] When maintenance is completed on the space 21 side, the operator releases the fixed state of the car top station 7 using the stopper 31a. When the operator leaves the car top station 7, the car top station 7 automatically starts moving by its own weight from the space 21 side toward the fixed position side along the handrails 3a and 3b together with the control cable 8.

[0072] At this time, since the roller 14b moves downward along the inclined surface 14a, the control cable 8 is disposed on the placement portion 14 while moving downward together with the roller 14b.

[0073] When the control cable 8 moves along the arrangement portion 14, the upper car station 7 moves from the space 21 side to a fixed position along the handrails 3a and 3b in conjunction with the control cable 8. When the upper car station 7 returns to the fixed position, it is arranged at that position.

[0074] According to the third embodiment as described above, by providing the inclined surface 14a formed by extending in the longitudinal direction of the upper surface of the arrangement portion 14 and the roller 14b that abuts against the control cable 8 arranged on the inclined surface 14a and is movable along the inclined surface 14a together with the control cable 8, the upper car station 7 can be automatically arranged at the fixed position without the operator moving the upper car station 7.

[0075] In addition, the handrail 3a is provided with a stopper 31a for fixing or making the upper car station 7 movable on the handrail 3a, so that maintenance work or normal operation of the car 2 can be performed safely.

Explanation of Signs

[0076] 1 hoistway, 2 car, 3a, 3b, 12a, 12b handrails, 30a, 30b, 120a, 120b cutout portions, 31a, 121a stoppers, 6 control panel, 7, 13 upper car stations, 7a, 7b, 13a, 13b guide rollers, 8 control cable, 9 hoisting machine, 11, 14 arrangement portions, 14a inclined surface, 14b roller, 20, 21 spaces

Industrial Applicability

[0077] The present invention is an upper car maintenance device having an upper car station to which a control cable for controlling equipment provided in the car is connected.

Claims

1. A handrail installed along the upper outer periphery of a car that moves up and down in an elevator shaft, A car upper station to which a control cable for transmitting power supply or control signals to equipment provided in the car is connected, When viewed from the vertical direction, it is provided so as to extend in the longitudinal direction of the handrail on one side disposed on the side closest to the equipment installed in the elevator shaft where maintenance is performed from above the car, and engages to fixedly or movably support the car upper station; An engaged portion fixed to the car upper station, engaging with the engaging portion to support the car upper station and enabling the car upper station to move along the handrail on one side; A car upper maintenance device, comprising: a placement portion provided to extend horizontally directly below the car upper station, on which the control cable that moves following the car upper station when the car upper station moves along the engaging portion via the engaged portion is disposed on the upper surface.

2. The handrail on one side is characterized in that when viewed from the longitudinal direction, both ends are disposed at different heights and are disposed parallel and inclined to each other, according to the car upper maintenance device according to Claim 1.

3. An inclined surface formed to extend in the longitudinal direction of the upper surface of the placement portion; A roller that abuts against the control cable disposed on the inclined surface and is movable along the inclined surface together with the control cable, according to the car upper maintenance device according to Claim 1.

4. The handrail on one side is provided with a stopper for fixedly or movably securing the car upper station to the handrail on one side, according to the car upper maintenance device according to Claim 1.

5. The handrail on one side is provided with a stopper for fixedly or movably securing the car upper station to the handrail on one side, according to the car upper maintenance device according to Claim 2.

6. The handrail on one side is provided with a stopper for fixedly or movably securing the car upper station to the handrail on one side, according to the car upper maintenance device according to Claim 3.

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