JPH025151Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a sheave for an elevator hoisting device that prevents damage to the rope groove.

The sheave of an elevator hoisting machine is provided with a rope groove on its outer circumferential surface in order to raise and lower an elevator body by winding a wire rope around it. The precision of this rope groove, that is, its shape and smoothness, has a great influence on the hoisting ability when raising and lowering an elevating object with a wire rope.

Therefore, it goes without saying that the required accuracy of the rope grooves of the sheave must be maintained until the elevator starts operating.

However, during the elevator installation period, the hoisting machine may be used as an installation device to perform installation work by winding a wire rope around the sheave and raising and lowering the work platform within the hoistway.

However, the environment where elevators are installed is poor for maintaining the precision of rope grooves, and dust, mortar, sand, etc., often adhere to wire ropes and rope grooves. For this reason, when the hoist is used as an installation device when installing an elevator, there is a risk that the rope groove may be abnormally worn by the wire rope or that the groove surface may be damaged.

This invention was made in order to eliminate the above-mentioned conventional drawbacks, and aims to provide a sheave for an elevator hoisting machine that can prevent damage to the rope groove when the hoisting machine is used as an installation device. purpose.

Hereinafter, embodiments of the sheave of the elevator hoisting device of this invention will be described based on the drawings. FIG. 1 is a front view showing the installed state of the hoisting device to which one embodiment is applied, FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG.
The figure is an enlarged view of the temporary sheave, and Figure 4 is the − of Figure 2.
It is a sectional view of a line.

In FIGS. 1 to 4, 1 is a hoist installed on the hoistway, 2 is a sheave that is rotationally driven by the hoist 1, and the sheave 2 has a plurality of grooves on its outer circumferential surface. 1 rope groove 2a is formed on the circumference,
A temporary sheave 3 is provided on the outer peripheral surface of the sheave 2.

As is clear from FIG. 4, a second rope groove 3a is formed on the outer peripheral surface of the temporary sheave 3. The temporary sheave 3 is divided into two parts on the circumference, and is fastened to the outer periphery of the sheave 2 by a fastener 3b. Note that 3c is an inspection window for attaching the temporary sheave 3 in parallel to the sheave 2.

In this way, the second rope groove 3 is formed on the outer periphery of the sheave 2.
Since the temporary sheave 3 having a diameter of 3.a is detachably attached using the fastener 3b, when installing the elevator, the wire rope 4 is hung in the second rope groove 3a of the temporary sheave 3, and the wire rope 4 is used during installation. Since the wire rope 4 is then used by hanging on the first rope groove 2a, the rope groove 2a will not be damaged during installation.

Further, since the temporary sheave 3 is of a split type, it can be easily attached and detached, and can be easily and inexpensively manufactured and used repeatedly.

As described above, according to the sheave of the elevator hoisting device of this invention, a removable temporary sheave is attached to the outer peripheral surface of the sheave or deflection sheave of the permanent hoisting machine that also serves as the elevator installation device. Since I set it up,
Even if mortar, sand, etc. adhere to the wire rope, wear and damage to the rope grooves of the sheave or deflection wheel can be prevented due to this, and therefore, the hoisting capacity of the hoisting machine can be prevented from decreasing when the elevator is operated. There are preventable effects.

In addition, since it is easy to manufacture a temporary sheave and to attach and detach it to a sheave or deflection sheave, it has the effect of reducing the cost of protecting the sheave.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the installed state of the hoisting device to which the sheave of the elevator hoisting device of this invention is applied;
Fig. 2 is an enlarged view of the main part of Fig. 1, Fig. 3 is an enlarged view of a temporary sheave applied to the sheave of the elevator hoisting device of this invention, and Fig. 4 is an enlarged view of the - line in Fig. 2. FIG. 1... Winding machine, 2... Sheave, 2a... First rope groove, 3... Temporary sheave, 3a... Second rope groove, 3b... Fastener, 3c... Inspection window, 4...
Hoisting rope, 5... deflection wheel. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] The temporary sheave has an arc-shaped temporary sheave having a second rope groove that is removably attached to the outer periphery of the sheave having a plurality of first rope grooves, and the temporary sheave has a plurality of arc-shaped pieces that are divided into a plurality of rope grooves. A sheave for an elevator hoisting device, characterized in that the sheave is fastened in a shape and mounted on the circumferential surface of the sheave.