JPH0620989B2 - Safety equipment for elevator construction - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a safety device for elevator construction, and particularly to a safety device for elevator construction suitable for use during installation.

[Conventional technology]

Generally, in elevator installation work, a car is used as a scaffolding, and by raising and lowering this car, equipment installed in the hoistway, such as a landing sill, parts around doors of a landing, and landing position control Various parts such as boards and junction boxes for tail cords are attached.

The car is raised and lowered with each of these operations, but the upper limit is restricted so that the car does not collide with the bottom of the machine room floor, and the lower limit of the car is restricted so that the counterweight does not collide with the bottom of the machine room floor. You have to limit it. A safety device for elevator construction that imposes this limitation was proposed in Japanese Utility Model Laid-Open No. 52-64468 and is shown in FIG.

FIG. 2 is a vertical cross-sectional view showing the outline of the hoistway, in which the car 2 is connected to one end of the rope 4 hung on the hoisting machine 6 installed in the machine room 5, and the counterweight 3 is attached to the other end of the rope 4. Are connected. In the machine room 5, a control panel 7 that controls the raising and lowering of the car 2 is arranged. When mounting the above-mentioned components, the car 2 is used as a scaffolding while raising and lowering the car 2. However, since the upper and lower limits of the car 2 are regulated, the car 2 can be operated at the corresponding positions. Limit switches 9a and 9b are provided, respectively. When the car 2 is detected by the limit switches 9a and 9b, the car 2 is stopped.
And the limit switches 9a and 9b are connected to each other, the detection signals of the limit switches 9a and 9b are sent to the control panel 7, and the hoisting machine 6 is stopped.

[Problems to be solved by the invention]

Since the conventional safety device for elevator construction has the above-mentioned configuration, the limit switches 9a and 9b and the wiring 10a,
The work of attaching 10b was troublesome. In particular, the wiring 10b connecting between the limit switch 9b and the control panel 7 becomes longer as the building becomes higher in height, which makes the installation work troublesome and the installation cost gradually increases.

The present invention solves the above-mentioned problems, and an object of the present invention is to provide an elevator construction safety device that facilitates the work of attaching wiring in a limit switch that regulates the upper and lower limits of a car.

[Means for solving problems]

The present invention, in order to achieve the above object, in the vicinity of the rope of the car near the hoisting machine and in the vicinity of the counterweight side, each provided with a limit switch, the limit switch of the car at a position corresponding to the upper and lower limit position, respectively. The rope is provided with an actuating member.

[Work]

Since the safety device for elevator construction of the present invention has the above-described configuration, when the car reaches the upper limit, the member provided on the car side rope operates the limit switch on the car side,
The car can be stopped based on this signal, and when the car reaches the lower limit, the member provided on the rope on the counterweight side activates the limit switch on the counterweight side, and based on this signal, the car Can be stopped. Moreover, both limit switches are located near the machine room, so the wiring to the control panel is extremely short.
Therefore, the work of attaching the wiring is extremely easy.

〔Example〕

An embodiment of a safety device for elevator construction according to the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical cross-sectional view showing an outline of the inside of the hoistway. A hoisting machine 6 controlled by a control panel 7 is arranged in a machine room 5 formed above the hoistway 1. The car 2 is connected to one end of the rope 4 hung on the hoisting machine 6, and the counterweight 3 is connected to the other end of the rope 4. Machine room 5
A limit switch 9a for detecting the upper limit of the car 2 is provided in the vicinity of the rope 4 on the side of the car 2 of the hoisting machine 6, and on the other hand, in the vicinity of the rope 4 on the side of the counterweight 3 of the hoisting machine 6. Is provided with a limit switch 9b for detecting the lower limit of the car 2.

Therefore, both limit switches 9a and 9b are arranged in the machine room 5, and the installation is easy. Further, since both limit switches 9a and 9b are located near the control panel 7, the wirings 10a and 10b for connecting them are extremely short as compared with the conventional example, and the installation work thereof is easy.
It is members 8a and 8b provided on the rope 4 that actuate both limit switches 9a and 9b. The member 8a actuates the limit switch 9a when the car 2 reaches the upper limit, and the member 8b causes the car 2 to move to the lower limit. It is provided corresponding to the upper and lower limits of the car 2 so that the limit switch 9b is actuated when the limit is reached.

FIG. 1 shows the state in which the car 2 has risen and is approaching the upper limit. When the car 2 reaches the upper limit, the member 8a activates the limit switch 9a, and this signal is given to the control panel 7. The control board 7 controls the hoisting machine 6 to stop the car 2. On the other hand, when the car 2 descends and reaches the lower limit, the member 8b ascends together with the counterweight 3 to operate the limit switch 9b, and controls the hoisting machine 6 based on the signal given to the control board 7 to control the car 2 To stop.

In the above embodiment, the limit switches 9a and 9b are
Although it is provided near the rope in the machine room 5, the same effect can be expected by arranging it near the machine room 5 such as between the hoistway 1 and the machine room 5.

〔The invention's effect〕

As described above, the present invention provides limit switches in the vicinity of the rope on the car side and the counterweight side of the hoisting machine, respectively, and provides the rope with members for operating the limit switches corresponding to the upper and lower limits of the car. Therefore, by arranging both limit switches in the vicinity of the machine room, the wiring for connecting to the control panel can be shortened, and therefore the work for attaching the wiring is extremely easy. Moreover, since the members are dispersed on the ropes located on both sides of the hoist, the members are not damaged by the hoist.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an outline of an elevator construction safety device according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view showing an outline of a conventional elevator construction safety device. 1 ... hoistway, 2 ... car, 3 ... balance weight,
4 ... Rope, 5 ... Machine room, 6 ... Hoisting machine, 7 ... Control panel, 8a, 8b ... Member, 9a, 9b ... Limit switch, 10a, 10b ... Wiring.

Claims (1)

[Claims] 1. A car connected to one end of a rope hung on a hoist in a machine room, and a balance weight connected to the other end of the rope to determine the upper and lower positions of the car in the hoistway. In the safety device for elevator construction, which is detected by the limit switch and sends the signal of the limit switch to the control panel of the hoisting machine through wiring, the car side and the counterweight side near the hoisting machine. A safety device for elevator construction, wherein the limit switches are provided in the vicinity of the rope, and members for operating the limit switches are provided on the rope at positions corresponding to the upper and lower limit positions of the car.