JP2001122560A - Counterweight for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a counterweight capable of lessening its shape so as to prevent impeding lifting of an elevator even in the case a hoist or the like is set up in a hoist way. SOLUTION: In this counterweight for an elevator suspending a cage to one end side also the counterweight to the other end side of a suspension rope wound to a traction sheave, a lower beam 15 of a counterweight frame 12 is constituted by a pair of L-shaped members 15a, 15b opposed to each other, a weight 23 is loaded on a horizontal lower side part of both the L-shaped members.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a counterweight for an elevator.

[0002]

2. Description of the Related Art Generally, in an elevator, when driving a car, a very large motor capacity is required to raise and lower the car independently. Therefore, the other end of a suspension rope for suspending the car is required. A system configuration is adopted in which a counterweight is attached to the side and the force and torque (motor capacity) necessary for the car to move up and down are minimized.

That is, a traction sheave driven by a driving device is provided in a machine room provided above a hoistway, and one end of a suspension rope wound around the traction sheave is provided with a pair of traction sheaves provided in the hoistway. And suspends a car that moves up and down along the guide rails for the car, and suspends a counterweight that moves up and down along a pair of counterweight guide rails on the other end of the suspension rope. Are raised and lowered alternately.

As shown in FIGS. 6 and 7, the counterweight of the elevator is usually composed of a counterweight frame 1 and a plurality of weights 2. The counterframe 1 is formed by bending a steel plate. It is made by combining an upper beam 3, standing frames 4, 4 and a lower frame 5 made of a shaped steel. The lower beam 5 is formed of a C-shaped steel plate bending member or a C-shaped steel member having a convex shape, and is inserted between the left and right standing frames 4 and fixed to the standing frame 4. A bottom plate 6 for collision with a shock absorber (not shown) provided at the bottom of the hoistway is attached to a lower portion of the shaft by welding. Brackets 7 are attached to the lower surface of the bottom plate 6 at the left and right ends thereof, and a guide device 8 that engages with a counterweight guide rail is attached to each bracket 7.

On the other hand, the left and right ends of the weight 2 are inserted into and engaged with the openings of the left and right standing frames 4 and 4 facing each other, and are stacked on the lower beam 5.

[0006] Further, a suspending tool 9 for connecting a suspending rope is mounted on the upper beam 3, and brackets 10 are mounted on the left and right ends of the upper beam 3 and the upper portion of the standing frame 4, respectively. A guide device 11 that engages with the counterweight guide rail is attached to each bracket 10.

[0007]

However, in recent years, there has been no machine room provided above the hoistway for efficient use of space, and a hoisting machine has been installed in the hoistway to save space. An elevator employing a roomless system has been proposed. However, when the hoist is installed on the top of the hoistway in this way, it may hinder the raising and lowering of the car and the counterweight.

In view of the above, the present invention can reduce the shape of the above-mentioned counterweight, and can prevent the lifting of the counterweight even if a hoisting machine is installed in the hoistway. The purpose is to obtain.

[0009]

The invention according to claim 1 is
A car is suspended on one end side of a suspension rope wound around a traction sheave, and the lower beams of the above-mentioned counterweight frame are opposed to each other in a counterweight in an elevator having a counterweight suspended on the other end of the suspension rope. It is characterized in that it is constituted by a pair of L-shaped members, and weights are loaded on the horizontal lower sides of the two L-shaped members.

A second aspect of the present invention is characterized in that, in the first aspect of the present invention, a pair of L-shaped members facing each other is provided with a reinforcing plate extending over the lower horizontal sides thereof.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a pair of L-shaped members opposed to each other is reinforced at a position corresponding to a collision portion with a shock absorber between lower horizontal sides. The material is provided.

Further, the invention according to claim 4 is a counterweight in an elevator in which a car is suspended on one end of a suspension rope wound around a traction sheave and a counterweight is suspended on the other end of the suspension rope. , Wherein the lower beam of the counterweight has a C-shaped cross-section that is convex upward, and the size of the horizontal upper side of the lower beam is larger than the horizontal-projected cross-sectional shape of the shock absorber. .

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the lower beam spans between a pair of opposite L-shaped members facing each other and a horizontal upper side portion of each of the inverted L-shaped members. It is characterized in that it has an upwardly convex C-shaped cross-sectional shape by a reinforcing plate mounted on a horizontal upper side portion.

According to a sixth aspect of the present invention, in the invention of the fourth or fifth aspect, the outer surface of the upright frame corresponding to the inner space of the lower beam below the surface including the horizontal upper side of the lower beam is provided. A guide device for engaging with the weight guide rail is provided.

[0015]

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

FIG. 1A shows a first example of the counterweight according to the present invention.
FIG. 2B is a partial cross-sectional side view of the embodiment, and a counterweight frame 12 in the counterweight is rectangular by an upper beam 13, left and right standing frames 14, 14, and a lower beam 5. Is formed. The left and right standing frames 14, 14 are
In particular, as shown in FIG. 2 (c), it has a U-shaped cross section made by bending a steel plate or forming a shape steel.
The openings are arranged to face each other, and the end of the weight 16 is engaged with the opening.

A hanging rope (not shown) or a sheave 17 to be wound is rotatably mounted on the upper beam 13, and furthermore, a balance weight guide rail is provided on the outer surface of the top of the upright frames 14, 14. An engaging guide shoe 18 is mounted.

On the other hand, the lower beam 15 is a pair of L-shaped members 15a, 15a, 1b formed by bending a steel plate or forming a shaped steel.
2b, the lower horizontal sides of the L-shaped members 15a and 15b are arranged facing each other and apart from each other as shown in FIGS. 2 (b) and 2 (c). Are fixed to the inner surfaces facing each other by welding or the like.
Reinforcing lower beams 19 are mounted on the lower surfaces of the horizontal lower sides of the two L-shaped members 15a and 15b by welding or bolts. Guide shoe 21 through
Are attached (FIG. 1A).

The gap between the lower horizontal sides of the two L-shaped members 15a and 15b is filled in a portion overlapping the safety device provided at the bottom of the hoistway on the horizontal projection plane. A reinforcing plate 22 is attached.

The space defined by the two L-shaped members 15a, 15b and the left and right standing beams 14, 14 forming the lower beam 15 corresponds to the dimension between the vertical sides of the two L-shaped members 15a, 15b. Weight 23 having a specified width dimension (dimension in a direction orthogonal to the longitudinal axis) is provided, and the L-shaped member 15
a, 15b are loaded on the horizontal lower side, and
Thus, a weight 16 similar to the conventional weight 16 having a width slightly larger than the special weight 23 is loaded at an upper position.

As described above, in the present embodiment, the lower beam 15 is connected to the pair of L-shaped members 15a, 15b facing each other.
Therefore, a space for loading the special weight 23 can be formed inside the lower beam 15, and by loading the special weight 23 inside the lower beam 15, the space can be weighted in a gap that has not been conventionally used. Can be loaded, and the height of the counterweight frame 12 can be suppressed smaller than that of the conventional type. Therefore, even when a hoisting machine or the like is provided at the upper part of the hoistway, it is possible to raise and lower the counterweight without being hindered by them.

The L-shaped member 15 constituting the lower beam 15
If the thickness of a and 15b is about the same as the conventional one,
Although it is disadvantageous in strength as compared with the lower beam of the conventional counterweight frame, since the lower reinforcing beam 19 is attached to the L-shaped members 15a and 15b, the lower beam 15 and the reinforcing lower beam 19 are integrated and The same or higher strength can be secured.

Further, by providing the reinforcing plate 22 at the portion between the horizontal lower sides of the L-shaped members 15a and 15b and overlapping the moderator on the horizontal projection plane, the stress acting on the lower beam 15 can be reduced. it can.

FIGS. 3 (a) and 3 (b) show a second embodiment of the present invention.
It comprises left and right standing frames 34, 34 and a lower beam 35, and a weight 36 is loaded in the counterweight frame 32. That is, the ends of the weight 36 are engaged with the openings of the standing frames 34, 34 facing each other, and are stacked on the upper horizontal side portion 35 b of the lower beam 35. A sheave 37 is attached to the upper beam 33 in the same manner as that shown in FIG.
A guide shoe 38 that engages with the counterweight guide rail is attached to the outer surface of the top of 4.

As shown in FIGS. 4 (a) and 4 (b), the lower beam 35 is formed by bending a steel plate or forming a steel shape, and has an upwardly convex C-shaped cross section. The area of the upper horizontal side portion 35b of the lower beam 35 is larger than the horizontal projected cross-sectional shape of the shock absorber. Then, both ends of the lower beam 35 are inserted into openings facing each other of the standing frames 34, 34, and the vertical side portions 35a
Are fixed to inner surfaces of the standing frames 34, 34 facing each other by welding or bolts. In addition, each of the above standing frames 34,
Guide shoes 39 which are engaged with the counterweight guide rails are respectively mounted on positions on the outer surface of the lower end of the lower end 34 corresponding to the internal space of the lower beam 35.

Thus, the upper horizontal side 35b of the lower beam 35
Is larger than the horizontal projected cross-sectional shape of the arrestor, so that the collision with the arrestor can be received at the horizontal portion of the C-shaped cross-section. Since there is no backing plate provided, the substantial height of the counterweight frame 32 can be reduced.

When the width of the counterweight frame 32 is not large due to the layout and the roping is 2: 1, a sheave is attached to the upper beam 33 as shown in FIG. A guide shoe 38 is attached to an upper outer surface of the upper case. Therefore, in such a case, by attaching the lower guide shoe 39 to the lower outer surface of the upright frame 34 as described above, the upper and lower guide shoes 38 and 39 can be shared, and the number of parts is reduced. can do.

In the second embodiment, the lower beam 35
Is shown as a C-shaped cross section, as shown in FIG. 5, a lower beam 40 is formed by a pair of inverted L-shaped members 40a and 40b, and upper portions of the inverted L-shaped members 40a and 40b are formed. The horizontal sides may be spaced apart and opposed to each other, and a reinforcing plate 41 extending between the upper horizontal sides may be attached to both upper horizontal sides.

The embodiment shown in FIG. 5 has the same operation and effect as the second embodiment.

[0030]

As described above, according to the present invention, the lower beam of the counterweight is constituted by a pair of L-shaped members opposed to each other, and the weight is loaded on the horizontal lower sides of the two L-shaped members. Therefore, it is possible to load more weight on the lower portion of the counterweight frame as compared with the conventional counterweight, and the height of the counterweight can be reduced. Therefore, even when a hoisting machine or the like is provided inside the hoistway, the counterweight can be raised and lowered without being hindered by those.

When the lower beam has an upwardly convex C-shaped cross-sectional shape and the size of the horizontal upper side of the lower beam is made larger than the horizontal projected cross-sectional shape of the safety device, In the event of a collision with armor, the lower beam and the weight loaded on it receive the collision load, so the effective height of the counterweight can be reduced and the shape of the lower beam can be simplified. It suffices if it is possible to secure a section modulus sufficient to receive the weight of the weight.

Further, in the case where a guide such as a guide shoe is attached to the lower outer surface of the standing frame, the lateral width of the counterweight cannot be made large, and the guide is attached to the upper outside of the standing frame. , The upper and lower guides can be shared.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of a counterweight according to the present invention, wherein (a) is a front view and (b) is a partial cross-sectional side view.

2 (a) is an enlarged front view showing the vicinity of a lower beam of the counterweight frame shown in FIG. 1, (b) is a cross-sectional view taken along line BB of (a), and (c) is (a) FIG. 4 is a plan cross-sectional view of FIG.

FIGS. 3A and 3B are diagrams showing a second embodiment of the present invention, wherein FIG.
Is a front view, and (b) is a partial cross-sectional side view.

4A is an enlarged front view showing a portion near a lower beam of the counterweight frame shown in FIG. 3, and FIG. 4B is a partial cross-sectional side view of FIG.

FIG. 5 is a view showing another embodiment of the counterweight shown in FIG. 4 (b).

6A and 6B are a front view and a side view of a conventional counterweight.

7A is an enlarged front view showing a portion near a lower beam of the counterweight shown in FIG. 6, and FIG. 7B is a cross-sectional view taken along line AA of FIG.

[Explanation of symbols]

 12, 32 Counterweight frame 13, 33 Upper beam 14, 34 Standing frame 15, 35, 40 Lower beam 15a, 15b L-shaped member 16, 36 Weight 17, 37 Sheave 18, 21, 38, 39 Guide shoe 19 Reinforced lower beam 22 Reinforcement plate 23 Special weight

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuyuki Gazuma 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in Fuchu Plant, Toshiba Corporation (reference) 3F306 AA07 DA15

Claims (6)

[Claims] 1. A counterweight for an elevator in which a car is suspended at one end of a suspension rope wound around a traction sheave and a counterweight is suspended at the other end of the suspension rope. The beam is constituted by a pair of L-shaped members facing each other,
A counterweight for an elevator, characterized in that a weight is loaded on the lower horizontal portion of the shaped member. 2. A counterweight for an elevator according to claim 1, wherein a reinforcing plate extending between the pair of L-shaped members facing each other is attached to lower horizontal sides of the pair of L-shaped members. 3. A reinforcing member is provided between the lower horizontal sides of a pair of L-shaped members opposed to each other at a position corresponding to a collision portion with a shock absorber. 2. The counterweight for elevator according to 2. 4. A counterweight for an elevator in which a car is suspended at one end of a suspension rope wound around a traction sheave and a counterweight is suspended at the other end of the suspension rope. A counterweight for an elevator, characterized in that the upper beam has a C-shaped cross-sectional shape that is upwardly convex, and the size of the horizontal upper side of the lower beam is larger than the horizontal projected cross-sectional shape of the shock absorber. 5. The lower beam is raised by a pair of inverted L-shaped members opposed to each other and a reinforcing plate that extends between horizontal upper sides of the inverted L-shaped members and is mounted on the horizontal upper sides. The counterweight for an elevator according to claim 4, wherein the counterweight has a convex C-shaped cross section. 6. A guide device for engaging a counterweight guide rail is provided on an outer surface of a standing frame corresponding to an inner space of a lower beam below a surface including a horizontal upper side portion of the lower beam. An elevator counterweight according to claim 4 or 5, wherein the counterweight is an elevator counterweight.