JP5067421B2 - Elevator car handrail device - Google Patents

Description

  The present invention relates to a car handrail device that is used during maintenance and inspection of an elevator and ensures the safety of an operator on the car.

  Elevator workers often work on a car that moves up and down in a hoistway during maintenance and inspection. For this reason, a car upper handrail device is installed at the upper part of the car in order to ensure the safety of the worker who is working on the car.

  As a prior art of such a car handrail device, a handrail divided into a plurality of parts can be folded at the top of the car, and a plurality of detectors can be installed to easily detect the folded state of the handrail. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2002-284469

  When an elevator operator works on a car, conventionally, a safety hook fixed to the operator's belt or the like is connected to a part of the frame of the car handrail device to ensure the safety of the operator. Was. Note that this method is the same even when the car upper handrail device described in Patent Document 1 is provided in an elevator.

  However, if the safety hook is connected to the frame of the car handrail device, the work area (movable range) of the worker is limited to a predetermined range. For this reason, when it is necessary for the worker to move over the car over a wide range, it is necessary to change the safety hook, and there is a problem that workability is remarkably lowered.

  The present invention has been made to solve the above-described problems. The purpose of the present invention is to eliminate the need for changing safety hooks when an elevator operator works on a car. It is to provide an elevator car handrail device that can greatly improve performance

Car handrail device of an elevator according to the present invention is a car handrail device provided in the upper portion of the car which ascends and descends in an elevator shaft, so as to surround the four sides to stand 設時, freely tilted on top of the car a plurality of handrail frames which are provided, arranged on top of each handrail frame, a standing設時the handrail frame, a plurality of railing that will be formed in an endless shape as a whole so as to surround the four sides, provided the railing, When the handrail frame is erected, a guide that is movable along the endless handrail rail, a safety hook connecting means that is provided on the guide and that allows an operator on the car to connect the safety hook, and each handrail rail A guide drop prevention means that is arranged at each end and prevents the guide from coming off the handrail rail when the handrail frame is tilted, and a part of the guide fall prevention means has the same shape as the rail portion of the handrail rail Present When the handrail frame is erected, a part of it is placed in a straight line with the rail part of the handrail rail to connect the adjacent handrail rails, and when the handrail frame is tilted, part of it is displaced from the rail part of the handrail rail. To prevent the guide from falling .

  According to the present invention, when an elevator operator works on a car, it is not necessary to change the safety hook, and the workability can be greatly improved.

It is a perspective view which shows the elevator car handrail apparatus in Embodiment 1 of this invention. It is an AA arrow line view in FIG. FIG. 3 is a view taken in the direction of arrow B in FIG. 2. It is a side view which shows the elevator car handrail apparatus in Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the structure of the guide fall prevention means in an assembly state. It is a longitudinal cross-sectional view for demonstrating the function of a guide fall prevention means. It is the figure which showed only the horizontal handrail of FIG. It is E arrow line view in FIG. It is a disassembled perspective view for demonstrating the function of a guide fall prevention means. It is a perspective view for demonstrating folding operation | movement of the elevator car handrail apparatus in Embodiment 1 of this invention. It is a side view of the elevator car handrail device shown in FIG. It is a perspective view which shows the accommodation state of the elevator handrail apparatus of the elevator in Embodiment 1 of this invention. FIG. 13 is a side view of the elevator car handrail device shown in FIG. 12. It is a front view which shows the guide in Embodiment 2 of this invention. It is a side view which shows the guide in Embodiment 2 of this invention. It is a top view which shows the guide in Embodiment 2 of this invention.

Explanation of symbols

1 hoistway, 2 cage rooms, 3 cage doors, 4 door opener, 5 guide shoe,
6 Vertical column, 7 Upper frame, 8 Worker, 9 Front handrail, 10 Rear handrail,
11 handrail, 12 handrail, 13-16 handrail rail, 17-20 handrail frame,
17a relief hole, 21 support plate, 22 pins, 23 safety switch,
24 guide, 25 sliding material, 26 safety hook ring, 27 equipment in hoistway,
28 connecting portions, 29 bending portions, 30 pins, 31 links, 32 support plates,
33 pins, 34 support plates, 34a relief holes, 34b relief holes,
35 pin, 36 guide drop prevention means, 37 partition plate, 37a spring hook hole,
37b through hole, 38 partition plate, 38a through hole, 39 stepped bolt,
40 spring, 41 spring guide, 42 mounting plate, 43 base plate,
43a screw hole, 44 butterfly bolt, 44a tip screw part, 44b spring receiver,
45 Spring, 46 Guide roller

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
1 is a perspective view showing an elevator car handrail device according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes an elevator hoistway, 2 denotes an elevator cab, 3 denotes a car door that opens and closes the entrance / exit of the car room 2, 4 denotes a door opening / closing device that opens and closes the car door 3, and 5 denotes a guide shoe. Reference numeral 6 denotes a vertical column of a car frame that supports the car room 2, and is arranged on both sides of the car room 2. Reference numeral 7 denotes an upper frame of a car frame having a square ring shape, which is horizontally arranged above the car room 2 so as to surround the upper surface of the car room 2.

  The car handrail device that secures the safety of the worker 8 on the car is supported by the upper frame 7. The car upper handrail device includes a front handrail 9 disposed on the front side (the landing side) of the car, a rear handrail 10 disposed on the rear side of the car (the back side of the hoistway 1), and a lateral surface disposed on both sides of the car. Consists of handrails 11 and 12. And each handrail 9 thru | or 12 is standingly arranged on the upper surface of the upper frame 7 so that it may surround four directions, the work area | region of the worker 8 is formed in the inner side, and the fall of the worker 8 is prevented.

  Each of the handrails 9 to 12 includes a handrail rail provided at the uppermost portion thereof, and a handrail frame that supports the handrail rail. The handrail rail 13 and the handrail frame 17 of the front handrail 9 have the same configuration as the handrail rail 14 and the handrail frame 18 of the opposite rear handrail 10, and the handrail rail 15 and the handrail frame 19 of the side handrail 11 face each other. It has the same configuration as the handrail rail 16 and the handrail frame 20 of the horizontal handrail 12.

  Further, the car upper handrail device is configured to be foldable at the upper part of the car in order to save the space at the top of the hoistway 1. FIG. 1 shows a state in which the car handrail device is completely assembled at the time of maintenance and inspection of the elevator and is erected on the upper part of the car (hereinafter referred to as “assembled state”). The support plate 21 and the pin 22 are members for foldably configuring the car upper handrail device, and each lower end portion of the handrail frames 17 to 20 is fixed to the upper frame 7 so as to be rotatable. That is, in the car handrail device, the handrail frames 17 to 20 are folded and housed on the upper frame 7 by being completely tilted from the state shown in FIG. (Hereinafter referred to as “stored state”). Reference numeral 23 indicates whether or not the car handrail device is in a predetermined storage state based on the tilted state of the handrail frames 19 and 20, and if the car upper handrail device is not in the predetermined storage state, the elevator operation is performed. Is a safety switch that automatically switches to maintenance operation.

  The handrail rails 13 to 16 of the handrails 9 to 12 each have a flat shape. The handrail rails 13 to 16 are arranged in an endless manner surrounding the four sides so as to present a square ring having a predetermined roundness at the corner as a whole in the assembled state.

  The handrail rails 13 to 16 are provided with guides 24 that are movable along the endless handrail rails 13 to 16 when assembled. Here, FIG. 2 is an AA arrow view in FIG. 1, and FIG. 3 is an arrow B view in FIG. 2, and shows the configuration of the guide 24. The guide 24 includes a sliding member 25 made of a polymer material or the like and a safety hook ring 26 (safety hook connecting means). The sliding member 25 is for smoothly moving on the handrail rails 13 to 16 and is provided on a surface facing the handrail rails 13 to 16. The safety hook ring 26 is for connecting a safety hook fixed to the belt or the like of the worker 8. Then, as shown in FIG. 1, the elevator operator 8 moves on the car at the time of maintenance and inspection, and then connects his safety hook to the safety hook ring 26 to ensure safety, and the hoistway Inspect the internal equipment 27, etc.

  The guide 24 has a predetermined strength that does not come off the handrail rails 13 to 16 even in the event that the operator 8 falls from the car. For example, the guide 24 has a rectangular tube shape in which a slit having a predetermined width is formed in a part thereof, and is arranged so as to wrap the flat handrail rails 13 to 16. Further, when the guide 24 moves on the handrail rails 13 to 16, the guide 24 is directed downward so as to prevent contact with the connecting portion 28 between the handrail rails 13 to 16 and the handrail frames 17 to 20. Has been placed.

  That is, since the guide 24 has the above-described configuration, when the handrail rails 13 to 16 are assembled in an endless shape, the guide 24 is not in contact with all the connecting portions 28 and is not in contact with the adjacent handrail rails (for example, the handrail rail 15 and the handrail rail 13) can be moved smoothly. Further, in the assembled state, a predetermined roundness is formed at the corner portions of the handrail rails 13 to 16 having a square ring shape as a whole, so that the guide 24 can move smoothly in the corner portions. Therefore, the guide 24 has a configuration capable of making a round trip in both directions along the handrail rails 13 to 16 above the car room 2 and on the car of the worker 8 connected by the safety hook. Can be easily followed.

  Further, the handrail rail 15 of the horizontal handrail 11 and the handrail rail 16 of the lateral handrail 12 are formed with curved portions 29 (corresponding to the above-mentioned corner portions) for smoothly moving the guide 24 at each end. . Since the curved portion 29 is connected to the ends of the handrail rails 13 and 14 in the assembled state, the curved portion 29 is curved toward the inside of the car with a predetermined curvature. Therefore, for example, if the handrail 11 is tilted to the inside of the car while the handrail rail 15 is completely fixed to the handrail frame 19, the height dimension of the car handrail device in the housed state increases, and the hoistway Space saving at the top of 1 is hindered.

  For this reason, the car handrail device has a predetermined configuration in which the handrail rails 15 and 16 can be stored while being held in a horizontal state. For example, by providing a pin 30 arranged in parallel to the pin 22 at the connecting portion 28 of the handrail 11, the handrail rail 15 and the handrail frame 19 are rotated about the longitudinal direction of the handrail rail 15. Connect freely. And the link 31 is connected between each curved part 29 and the upper frame 7 of the handrail rail 15, and the upper surface of the handrail rail 15 is always kept horizontal even when the handrail frame 19 is tilted. 32 and 33 are support plates and pins for rotatably fixing the lower end portion of the link 31 with respect to the upper frame 7, and 34 and 35 are upper end portions of the link 31 and the curved portion of the handrail rail 15. 29 shows a support plate and a pin that are rotatably fixed to 29. The horizontal handrail 12 has the same configuration as the horizontal handrail 11.

  On the other hand, the car handrail device is housed on the car by tilting the handrails 9 to 12 inward. For this reason, the handrail rails 13 to 16 formed as an endless shape as a whole in the assembled state are arranged apart from each other in the stored state. The guide fall prevention means 36 is for preventing the guide 24 from coming off from each end of the handrail rails 13 to 16 when the car upper handrail device is not in the assembled state. Provided in each part. Below, the concrete structure of the guide fall prevention means 36 is demonstrated to the example provided in the one end part which the handrail rail 15 of the horizontal handrail 11 and the handrail rail 13 of the front handrail 9 adjoin.

  4 is a side view showing the elevator car handrail device according to Embodiment 1 of the present invention, FIG. 5 is a longitudinal sectional view showing the structure of the guide drop prevention means in the assembled state, and FIG. 6 shows the function of the guide drop prevention means. FIG. 7 is a view showing only the horizontal handrail of FIG. 6, FIG. 8 is a view taken in the direction of arrow E in FIG. 7, and FIG. 9 is an exploded perspective view for explaining the function of the guide drop prevention means. It is. FIG. 5 shows a portion C in FIG. Moreover, FIG. 8 is also a DD arrow view of FIG.

  4 to 9, the handrail rail 15 of the horizontal handrail 11 and the handrail rail 13 of the front handrail 9 are provided with partition plates 37 and 38 at respective one end portions adjacent to each other in the assembled state of the car handrail device. Yes. Each of the partition plates 37 and 38 has a T shape, and each upper portion has the same shape as each rail portion of the handrail rails 15 and 13, that is, a flat plate shape. Therefore, in the assembled state shown in FIG. 5, the upper portions of the partition plates 37 and 38 are arranged in a straight line with the rail portions of the handrail rails 15 and 13, and the adjacent handrail rails 15 and 13 are connected. For this reason, the guide 24 can freely move between the handrail rails 15 and 13.

  On the other hand, when the car handrail device is not in the assembled state, that is, when the handrail frame 19 or 17 is tilted, the upper portions of the partition plates 37 and 38 are the corresponding handrail rails as shown in FIGS. The rails 15 and 13 are arranged so as to be shifted from the rail portions. That is, the guide 24 is inhibited from moving by the partition plates 37 and 38 and cannot be detached from the respective end portions of the handrail rails 15 and 13.

  Here, 39 is a stepped bolt for pivotally fixing the partition plate 37 to one end surface of the handrail rail 15, and 40 is a shaft with respect to the handrail rail 15 with the axis of the stepped bolt 39 as the center. A spring that constantly biases to one side, 41 is a spring guide for determining the biasing direction of the spring 40, and 42 is a mounting plate for mounting the spring 40 at a predetermined position. Reference numeral 43 denotes a base plate provided on the support plate 34, and the stepped bolt 39 and the mounting plate 42 are fixed to the base plate 43 using the relief holes 34 a of the support plate 34. As shown in FIGS. 4 to 9, the partition plate 37 has a lower end portion constantly biased to one side by a spring 40 having one end portion inserted into the spring hooking hole 37a. Rotating around the attached bolt 39, the upper part thereof is arranged in a state shifted from the rail portion of the handrail rail 15. The partition plate 38 also prevents the guide 24 from coming off (falling) with the same configuration as described above.

  Further, the partition plates 37 and 38 are inserted into the through holes 37b and 38a formed at the lower end portions thereof so that the shaft portions of the butterfly bolts 44 are inserted so that the upper portions thereof are aligned with the rail portions of the handrail rails 15 and 13. The handrail rails 15 and 13 are formed in a continuous manner. Here, 43a is a screw hole formed in the base plate 43 to which the tip screw portion 44a of the butterfly bolt 44 is fixed, 34b is a relief hole formed in the support plate 34 for the tip portion of the butterfly bolt 44, Reference numerals 45 and 44b denote springs and spring receivers for constantly urging the butterfly bolt 44 in the direction in which the butterfly bolt 44 is pulled out of the through holes 37b and 38a, and reference numeral 17a denotes a relief hole for operating the butterfly bolt 44. The butterfly bolt 44, the through holes 37b and 38a, the screw hole 43a and the like constitute a holding means. The above is the configuration of the guide drop prevention means 36 provided between each end of the handrail rails 15 and 13, but the other guide fall prevention means 36 has the same configuration.

  Next, the operation | movement at the time of folding the cage | basket handrail apparatus which has the said structure from the state shown in FIG. 1 is demonstrated. 10 is a perspective view for explaining a folding operation of the elevator car handrail device according to Embodiment 1 of the present invention, FIG. 11 is a side view of the elevator car handrail device shown in FIG. 10, and FIG. 12 is the present invention. The perspective view which shows the accommodation state of the elevator car handrail apparatus in Embodiment 1 of this, FIG. 13 is the side view of the elevator car handrail apparatus shown in FIG.

  In the assembled state of the car handrail device shown in FIG. 1, as described above, the handrail rails 13 to 16 are formed in a row, and each guide fall prevention means 36 is in the state shown in FIG. When the car handrail device is stored from this state, the worker 8 first sets the guide drop prevention means 36 to a functioned state (state shown in FIG. 6) by a predetermined operation. That is, from the state shown in FIG. 5, the butterfly bolt 44 is relaxed and the shaft portion is pulled out from the lower ends of the partition plates 37 and 38. Then, the biasing force of the spring 40 causes the partition plate 37 to tilt with respect to the handrail rail 15 and the partition plate 38 with respect to the handrail rail 13 by a predetermined angle, thereby preventing the guide 24 from falling.

  Then, after all the guide fall prevention means 36 are functioned, the front handrail 9 and the rear handrail 10 are tilted to the inside of the car so as to be in a horizontal state above the car room 2. Next, as shown in FIGS. 10 and 11, the horizontal handrails 11 and 12 are tilted to the inside of the car, and the storage state shown in FIGS. 12 and 13 is obtained. Even when the handrail frames 19 and 20 of the horizontal handrails 11 and 12 are tilted to the inside of the car, the handrail rails 15 and 16 are always kept horizontal by the action of the link 31. Therefore, even in the storage state shown in FIGS. 12 and 13, the height dimension of the car handrail device can be kept low.

  Further, the car handrail device can be assembled by the reverse procedure to the above. In this case, for example, after raising the handrail frames 19 and 17 on the upper frame 7, the partition plates 37 and 38 are arranged so that the upper portion thereof is aligned with the rail portions of the handrail rails 15 and 13. Then, the butterfly bolt 44 is inserted into the through holes 38a and 37b and fastened to the screw holes 43a. Then, after raising the handrails 9 to 12 and arranging all the partitions so as to match the rail portions of the handrail rails 13 to 16, the operator 8 connects his safety hook to the safety hook ring 26 of the guide 24. Start work.

  According to the first embodiment of the present invention, when the elevator operator 8 works on the car, the safety hook does not need to be replaced, and the workability can be greatly improved. Therefore, it is a particularly effective means for a machine room elevator in which various devices are arranged in the hoistway 1. In addition, forgetting to hook the safety hook caused by removing the safety hook during work can be prevented at the same time.

  Further, in order to make the car upper handrail device foldable, even if each of the four handrails 9 to 12 is configured to be tiltable, guide fall prevention provided at each end of each handrail rail 13 to 16 The means 36 can reliably prevent the guide 24 from falling. Furthermore, since the handrail rails 15 and 16 having the curved portion 29 can be stored in a horizontal state, the height of the car handrail device in the stored state can be minimized, and the top space of the hoistway 1 can be reduced. It also becomes possible to save space.

Embodiment 2. FIG.
14 is a front view showing a guide according to Embodiment 2 of the present invention, FIG. 15 is a side view thereof, and FIG. 16 is a plan view thereof. 14 to 16, the guide 24 is provided with a guide roller 46 and a safety hook ring 26 for smoothly moving on the handrail rails 13 to 16. That is, when the guide 24 moves along the handrail rails 13 to 16, the guide roller 46 rotatably provided inside rolls on both sides of the handrail rails 13 to 16, thereby smoothly moving the guide 24. To guide.

  According to the second embodiment of the present invention, since the guide 24 smoothly moves on the handrail rails 13 to 16, the burden on the worker 8 is reduced, and the workability can be further improved.

  As described above, according to the elevator apparatus according to the present invention, when the elevator operator works on the car, it is not necessary to change the safety hook, and the workability is greatly improved. Can do. Therefore, the present invention can be applied to all elevators in which a car handrail device is installed on a car regardless of the elevator model or the like.

Claims (6)

A car handrail device provided at an upper part of a car that moves up and down in an elevator hoistway,
A plurality of handrail frames provided at the top of the car so as to be tiltable so as to surround the four sides when standing;
A plurality of handrail rails that are provided at the top of each handrail frame and are formed endlessly as a whole so as to surround four sides when the handrail frame is erected;
A guide that is provided on the handrail rail, and is movable along the endless handrail rail when the handrail frame is erected;
A safety hook connecting means provided on the guide and capable of connecting a safety hook by an operator on the car;
Guide fall prevention means that is arranged at each end of each handrail rail and prevents the guide from coming off the handrail rail when the handrail frame is tilted,
Equipped with a,
The guide fall prevention means is
A part thereof has the same shape as the rail portion of the handrail rail,
When the handrail frame is erected, the part is arranged in a straight line with the rail portion of the handrail rail, and connects between the adjacent handrail rails,
The elevator car handrail device characterized in that, when the handrail frame is tilted, the part is arranged so as to be displaced from a rail portion of the handrail rail, and the guide is prevented from falling . Guide fall prevention means
A partition plate provided rotatably at each end of each handrail rail, a part of which has the same shape as the rail portion of the handrail rail,
It is provided corresponding to each of the partition plates, and the corresponding partition plate is always urged to one side so that the part of the partition plate is displaced from the rail portion of the corresponding handrail rail. Spring,
Holding means for holding the part of the partition plate in a state of being arranged in a straight line with the rail part of the corresponding handrail rail when standing up the handrail frame;
The elevator car handrail device according to claim 1 , further comprising: The handrail rail is formed in a square ring shape having a predetermined roundness at the corner portion as a whole when the handrail frame is erected.
2. The elevator car handrail device according to claim 1 , wherein the handrail rail including the corner portion is always held in a horizontal state when the handrail frame is tilted. 3. A safety switch that detects whether or not the car handrail device is in a predetermined storage state, and automatically switches the operation of the elevator to a maintenance operation when it is not in the predetermined storage state;
The elevator car handrail device according to claim 1 , further comprising: The elevator car handrail device according to any one of claims 1 to 4 , wherein the guide is provided with a sliding material made of a polymer material on a surface facing the handrail rail. 5. The elevator car handrail device according to any one of claims 1 to 4 , wherein the guide is provided with guide rollers that roll on both sides of the handrail rail.

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