JP2000072349A - Counterweight approach alarm device for work lift device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To alarm the approach of a counterweight to a worker working near a hoistway by using a wire-containing rope as a wire rope wound on a top sheave, providing an approach alarm on the counterweight connected to the end of the wire rope and sounding it. SOLUTION: A work elevator 1 is provided with a lifting base 3 guided along one side surface 2A of hoistway strut 2 stood on a foundation surface G and a counterweight 4 guided along the other side surface 2B of the strut 2. The both 3, 4 are connected to both ends of a wire rope 5 wound on a top sheave 6A. The wire rope 5 is formed of a wire-containing rope, and a melody hone 10 and flash lights 11, 12 provided on the bottom of the counterweight 4 are connected to a power source board 13 within the lifting base 3 through the wire set in the wire rope 5, and these are operated to alarm the arrival of the counterweight 4 to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a counterweight proximity warning device for a construction elevating device for preventing a worker from being pinched by a counterweight of the construction elevating device.

[0002]

2. Description of the Related Art Among construction elevators such as construction elevators and construction lifts used at construction sites, high-speed or large-scale models have a lifting platform and a counterweight connected via a wire rope. No particular alarm device is provided for the counterweight, which descends and rises according to the elevation of the platform. For this reason, an accident has occurred in which the worker is inadvertently pinched by the counterweight that is gently moving up and down during the operation of the lifting device for construction.

[0003]

In order to prevent the occurrence of this kind of accident, an electrically operated proximity alarm, for example, a melody horn, a flashlight, etc., is attached to a counter weight which moves up and down gently, and the counter weight is It is conceivable to configure the system so as to alert the worker located above and below the counterweight when the counterweight is approaching by ascending and descending to alert the worker.

[0004] However, the counterweight is connected to the lifting platform via a hanging wire rope, and the lifting and lowering drive device connected to the lifting platform is raised and processed so that the counterweight also rises and falls. Therefore, power was not supplied to the counterweight, and the proximity alarm could not be installed on the counterweight.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a construction work elevating device capable of alerting a worker who is working near a hoistway of a counterweight when a counterweight approaches the construction work. An object of the present invention is to provide a counterweight proximity alarm device for a lifting device.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a feature of the present invention is to notify an operator of the proximity of a counterweight connected to a lifting platform via a wire rope wound on a top sheave. Therefore, in the counterweight proximity alarm device of the lifting device for construction, the wire rope is an electric rope, and a proximity alarm is provided in the counterweight, and the electric wire in the electric rope is attached to the proximity alarm. In that power is supplied from the lift via the elevator.

[0007] To the proximity alarm provided on the counterweight, electric power supplied to the elevator is supplied via an electric wire in a power-lined rope, and the proximity alarm can be operated at all times.

The proximity alarm may be, for example, a buzzer and a flashlight. A melody horn may be used instead of the alarm buzzer. If a proximity alarm having such a configuration is provided in the counterweight, it is possible to alert a worker who is performing a work approaching the hoistway to the fact that the counterweight is approaching.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an elevation view showing an example of an embodiment of a construction elevator provided with a proximity alarm device according to the present invention. The construction elevator 1 is temporarily installed on a construction site, and is supported by a column 2 for elevating (a hoistway) erected on a foundation surface G, and vertically guided by one side 2A of one side of the column 2. And a counter weight 4 that is similarly guided in the vertical direction and moves up and down on the other side surface 2B of the column 2.

Reference numeral 5 denotes an electric wire rope, one end 5A of which is connected to the lift 3 and the other end 5B of which is connected to the counterweight 4. The wire rope 5 is wound around a top sheave 6A provided at the upper end of the column 2, and the elevation drive unit 6 connected to the elevator moves up and down to move the top sheave 6A to the arrow U. This is a known configuration in which the counterweight 4 is raised or lowered by turning in the direction or the D direction.

Electric power is supplied to the elevator 3 from the outside. The melody horn 7 and the flashlight 8 are attached to the lower surface 3A of the elevator 3 and the upper end 3C of the car 3B of the elevator 3. The required power is supplied to the flashlight 9 and the melody horn 7 and the flashlights 8 and 9 operate when the elevator 3 moves up and down. Thus, the melody horn 7 and the flash lights 8, 9
Is provided as means for notifying an operator or the like of the approach when the elevator 3 is moved up and down to draw attention.

On the other hand, a proximity alarm is also attached to the counterweight 4 for the purpose of calling attention to the approach of the counterweight 4 to a worker who is working on the approach of the hoistway. In this embodiment, the melody horn 10 and the flashlight 11 are provided as a proximity alarm on the lower surface 4A of the counterweight 4, and the flashlight 12 is also provided on the upper surface of the counterweight 4 as a proximity alarm. The type and number of proximity alarms provided on the counterweight 4 can be determined as appropriate.

In order to supply electric power from the lift 3 to the melody horn 10 and the flashlights 11 and 12 attached to the counterweight 4 having no power supply equipment, a wire rope containing electric power is used as the wire rope 5. .

FIGS. 2 and 3 show the structure of the electric wire rope 5 in detail. As can be seen from FIGS. 2 and 3, the wire rope 5 is one in which electric wire is inserted into the fiber core of the rope. That is, it has a known structure in which a vinyl sheath 55, in which a plurality of electric wires 54 covered with an insulator 53 are passed through a plurality of cotton yarns, is arranged in a cord 52 surrounded by the strands 51. . Since the wire rope 5 containing electric wire can cope with a variety of rope configurations, types and diameters, and has the same mechanical characteristics as general fiber-core ropes, it can be used for all types of elevators and lifts.

Returning to FIG. 1, the melody horn 10 and the flashlights 11 and 12 are connected to the power supply panel 13 in the elevator 3 by the electric wires 54 installed in the wire rope 5. The power supply panel 13 includes a power supply cable 16, a power supply relay box 1, and an external power supply panel 17.
4. Power is supplied via the power cable 15;
A part of the supplied power is supplied to the melody horn 10 and the flash lights 11 and 12 provided on the counterweight 4 via the power supply panel 13 and the electric wire 54. The power of the proximity alarm device of the counterweight 4 is supplied to the power board 13 of the lift 3 rectified to 24 V DC so as not to cause an electric shock accident.

As a result, the melody horn 10 sounds when the counterweight 4 is raised and lowered, and the flash lights 11 and 12 emit light, so that the worker who is working on the hoistway of the counterweight 4 can be alerted. Therefore, the worker can easily detect the approach of the counterweight 4 by sound and light, and it is possible to effectively prevent an accident that the worker is pinched by the counterweight 4 during the work.

[0018]

According to the present invention, as described above, a proximity alarm such as a buzzer or a melody horn and / or a flashlight is provided on the counterweight, and the electric power supplied to the elevator is supplied to the proximity alarm. Since the power is supplied via the electric wire in the entering rope, it is possible to alert a worker who is working near the hoistway to the fact that the counterweight is approaching. Therefore, it is possible to effectively prevent an accident in which a worker who is working close to the counterweight is pinched by the approaching counterweight.

[Brief description of the drawings]

FIG. 1 is an elevation view showing an example of an embodiment of a construction elevator provided with a proximity alarm device according to the present invention.

FIG. 2 is a front view of the vicinity of an end of the wire rope containing electric power shown in FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevator for construction 2 Post 3 Elevator 4 Counter weight 5 Wire rope 6 Elevation drive 6A Top sheave 7, 10 Melody horn 8, 9, 11, 12 Flashlight 13 Power board 14 Power junction box 15, 16 Power cable 17 External Power panel 51 Strand 52 Core cord 53 Insulator 54 Electric wire 55 Vinyl sheath G Basic surface

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masahiro Ashikaga 4-2-27 Saijo Chuo, Higashihiroshima City, Hiroshima Prefecture Sanoyas Hishino Meishonai F-term (reference) 3F304 BA02 BA22 DA01 ED05

Claims (1)

[Claims] 1. A counterweight proximity alarm device of a construction lifting device for notifying an operator of the proximity of a counterweight connected to a lifting platform via a wire rope wound on a top sheave. The rope is an electric rope, and a proximity alarm is provided on the counterweight, and the proximity alarm is supplied with power from the elevator via an electric wire in the electric rope. Counterweight proximity warning device for construction lifting equipment.