JP4839692B2 - Upper scaffolding device for elevator counterweight - Google Patents

Description

  The present invention relates to an upper scaffold device for an elevator counterweight.

Conventionally, when the elevator car and the counterweight are arranged apart from each other, it is difficult to perform the maintenance work of the counterweight from the top of the car. Therefore, the scaffolding is installed in the hoistway to perform the maintenance work.
In addition, if the elevator car has an exterior or if the car ceiling is partly made of glass and the boarding space on the car is restricted during maintenance work, the car side equipment and hoistway equipment Since it is difficult to maintain adjacent counterweight devices and the like, for example, a scaffolding base is installed in a hoistway to perform maintenance work (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-301652

  However, when a scaffolding base is installed on a hoistway as in the prior art, it takes time to carry in and install the scaffolding base, and there is a problem that the labor of the carrying-in work and the installation work is also difficult.

  The present invention has been made in order to solve the above-described problems, and provides an elevator scaffolding weight upper scaffolding device having a maintenance work platform on an upper part of a counterweight.

In the elevator balancing weight upper scaffold device according to the present invention, in the elevator that moves the car and the balancing weight relatively up and down via the hoisting sheave and the baffle, a maintenance work platform that is permanently installed above the counterweight and A detachable or foldable handrail that surrounds the maintenance work platform, and the elevator is maintained by standing up the handrail at the top of the counterweight, and when the counterweight comes to the top of the hoistway, the hoistway A safety switch that is controlled so as to automatically stop at a certain position before the top is provided on the hoistway top and the handrail .

  According to the present invention, even when the boarding space on the car is limited in maintenance work, it is not necessary to carry in and install the scaffolding platform in the hoistway during the maintenance work, so the work time can be shortened. At the same time, labor for carrying in and installing can be eliminated.

Embodiment 1 FIG.
FIG. 1 is a plan view of a hoistway showing a case where two elevator weights suitable for applying the elevator scaffolding weight upper scaffold device according to Embodiment 1 of the present invention are adjacent to each other, and FIG. FIG. 3 is a plan view showing an upper scaffold device for an elevator counterweight according to Embodiment 1 of the present invention, and FIG. 4 is a first embodiment of the present invention. FIG. 5 is a partial front view of the elevator balancing weight upper scaffold device according to Embodiment 1 of the present invention when the handrail is stored.

  In the figure, it is an elevator of a two-unit type in which a car 1 and a counterweight 3 are moved up and down relatively via a hoisting machine sheave (not shown) and a deflecting wheel (not shown). The two elevator cars 1 have a structure in which a part of the ceiling of the car room has a glass 2 structure or the like, and a boarding space on the car is restricted in maintenance work. The counterweights 3 of the two elevators are arranged adjacent to the hoistway between the two cars 1. A permanent maintenance work table 4 and a detachable or foldable handrail 5 surrounding the maintenance work table 4 are provided at the upper part of the counterweight 3. The detachable or foldable handrail 5 is housed in the upper part of the maintenance work table 4 and is configured to be installed or pulled up when necessary and fixed to the standing position with a bolt or the like. As a result, workability is stable, falling can be prevented, and work efficiency can be improved. As shown in FIG. 5, the detachable or foldable handrail 5 is removed, folded, and stored in the upper part of the counterweight 3 as shown in FIG. The top gap is secured. The handrail 5 of the hoistway top and the counterweight 3 is provided with a safety switch device so that the counterweight 3 does not push up to the hoistway top during maintenance work. That is, a switch 6 with a roller is attached to the top of the hoistway, and an operating piece 7 made of a cam or the like is attached to the handrail 5 of the counterweight 3. As a result, when the counterweight 3 comes to the top of the hoistway, it automatically stops at a fixed position in front of the hoistway, so that the counterweight 3 stops before the height of the operator and the It is safe without being caught between. Further, during maintenance operation, even if normal operation is performed by an operation on the elevator car 1 side due to a mistake or the like, if the handrail 5 is erected, the sensor switch 8 provided in each part at a certain interval in the hoistway is provided. Since the elevator 9 is controlled so as to automatically switch to the slow operation at the maintenance operation speed by the cam 9 provided on the counterweight 3, the safety of the worker can be ensured. Needless to say, the maintenance operation can be automatically canceled by removing or folding the handrail 5 on the upper part of the counterweight 3 and releasing the maintenance operation on the car to return to the normal operation.

  Even when a part of the ceiling of the cab is a glass 2 structure and the boarding space on the cab is limited during maintenance work, if the counterweights 3 of two elevators are adjacent to each other during maintenance work, An operator gets on top of the maintenance work platform 4 of the counterweight 3 and attaches or raises the handrail 5 around the maintenance work platform 4 to make the other counterweight 3 equipment safe. Can be maintained. Also, the equipment on one side of the car, the equipment on the hoistway, etc. can be safely maintained from the upper part of one counterweight. Furthermore, an operator gets on top of the maintenance work platform 4 of the other counterweight 3 and attaches or raises a handrail 5 around the maintenance work platform 4 so that one of the counterweights can be raised. Equipment can be maintained safely. In addition, the equipment on the other car side and the equipment on the hoistway can be safely maintained from the upper part of the other counterweight.

  According to Embodiment 1 of the present invention, even when the boarding space on the car is limited in maintenance work, it is not necessary to carry in and install a scaffolding base in the hoistway during maintenance work. Work time can be shortened, and labor for carrying in and installing can be eliminated.

Embodiment 2. FIG.
In the first embodiment, a switch 6 with a roller is attached to the hoistway top so that the counterweight 3 does not push up to the hoistway top during maintenance work, and the operating piece 7 made of a cam or the like is attached to the handrail 5 of the counterweight 3. A sensor switch 8 is provided in each part of the hoistway at regular intervals, and a corresponding cam 9 is provided in the counterweight 3 so as to switch to maintenance operation even if it is mistakenly operated normally. However, in the second embodiment, a switch 6 with a roller, a contactless proximity switch provided in the hoistway instead of the operating piece 7 such as a cam, and a reaction plate provided in the handrail 5 of the counterweight 3 In addition to the sensor switches 8 provided at certain intervals in each part of the hoistway and the contactless proximity provided in the hoistway instead of the cam 9 provided on the counterweight 3 And switch is a combination of the reaction plate with the counterweight 3.

Embodiment 3 FIG.
In the first embodiment, a switch 6 with a roller is attached to the hoistway top so that the counterweight 3 does not push up to the hoistway top during maintenance work, and the operating piece 7 made of a cam or the like is attached to the handrail 5 of the counterweight 3. A sensor switch 8 is provided in each part of the hoistway at regular intervals, and a corresponding cam 9 is provided in the counterweight 3 so as to switch to maintenance operation even if it is mistakenly operated normally. However, in the third embodiment, the switch 6 with the roller, the projector and the light receiver of the photoelectric device provided in the hoistway instead of the operating piece 7 such as the cam, and the handrail 5 of the counterweight 3 are provided. A photoelectric switch provided in the hoistway in place of the sensor switch 8 provided in each part of the hoistway at regular intervals and the cam 9 provided in the counterweight 3 together with a light shielding plate And the emitter and receiver is a combination of the light shielding plate provided in the counterweight 3.

It is a top view of the hoistway which shows the case where the counterweight of two elevators suitable for applying the upper scaffold apparatus of the elevator counterweight in Embodiment 1 of this invention adjoins. It is a front view which shows the upper scaffold apparatus of the elevator counterweight in Embodiment 1 of this invention. It is a top view which shows the upper scaffold apparatus of the elevator counterweight in Embodiment 1 of this invention. It is a side view which shows the upper scaffold apparatus of the elevator counterweight in Embodiment 1 of this invention. It is a partial front view at the time of handrail accommodation which shows the upper scaffold apparatus of the elevator counterweight in Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elevator car 2 Glass 3 Counterweight 4 Maintenance worktable 5 Handrail 6 Roller switch 7 Actuating piece (cam)
8 Sensor switch 9 Cam

Claims (6)

In an elevator that raises and lowers a car and a counterweight relatively via a hoisting wheel and a deflector,
Provided with a permanent maintenance workbench at the top of the counterweight and a detachable or foldable handrail that surrounds the maintenance workbench, with the handrail at the top of the balance weight standing upright for maintenance operation of the elevator An elevator counterweight characterized in that a safety switch is provided on the top of the hoistway and the handrail so as to automatically stop at a certain position in front of the hoistway when the counterweight reaches the hoistway top. Upper scaffold device.   The upper scaffolding device for an elevator counterweight according to claim 1, wherein the handrail on the upper portion of the counterweight is configured to be folded when not needed and accommodated in the upper portion of the counterweight.   When the elevator is in maintenance operation with the handrail above the counterweight standing up, the elevator speed is automatically reduced by the sensors provided in each part of the hoistway even if it is accidentally put into normal operation. The elevator scaffolding weight upper scaffold device according to claim 1, wherein the upper scaffold device is controlled so as to be switched to a high speed operation. The upper part of the elevator counterweight according to any one of claims 1 to 3 , wherein the safety switch is a combination of a switch with a roller provided in a hoistway and a cam provided on a handrail. Scaffolding device. The elevator balance according to any one of claims 1 to 3 , wherein the safety switch is a combination of a contactless proximity switch provided in the hoistway and a reaction plate provided on the handrail. Upper scaffold device for weight. Safety switches, projector photoelectric device provided hoistway and a light receiver, as claimed in any one of claims 1 to 3, characterized in that a combination of the light shielding plate provided on the handrail Upper scaffolding device for elevator counterweight.

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