JPH11301950A - Hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the plane sizes of a car and a hoistway when a balance weight is provided equal to those when no balance weight is provided by providing the balance weight, and arranging a pulley to be hooked with a rope for suspending the balance weight inclinatorily against the axis of the hoistway plane. SOLUTION: If a moving pulley 14 is arranged in parallel with the axis Y of a hoistway plane without changing the hanging point C3 of a balance weight rope fitted to a beam 101, the hanging points of the moving pulley 14 and a fixed pulley 9A are drifted, the pulleys 14, 9A are twisted, and the balance weight rope is apt to be disconnected. A fixed pulley 9 to be hooked with the balance weight rope or the moving pulley 14 is arranged inclinatorily against the axis Y of the hoistway plane to prevent this problem, therefore the plane size of a car 1 and the plane size of a hoistway 100 can be made equal to those when no balance weight is provided without drifting the hanging point C3 of the balance weight rope.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a hydraulic elevator which controls the speed of a car by controlling the flow rate of a working fluid supplied to or discharged from a hydraulic cylinder.

[0002]

2. Description of the Related Art In a hydraulic elevator, a structure in which a counterweight is provided is disclosed in, for example, (1) Japanese Patent Laid-Open No. 6-183665.
And (2) JP-A-5-254758.

[0003]

In the prior art, the provision of the counterweight may cause the hoistway plane to be larger in size than the case where the counterweight is not provided. In other words, the size of the hoistway plane is restricted, and depending on the size of the hoistway plane, the equipment in the hoistway cannot be arranged unless the size of the car plane is reduced. As a solution to this problem, there is a method of shifting the counterweight of the counterweight or the car, but there is a problem in that an unbalanced load is generated in the guide device of the counterweight and that the rope is likely to be detached from the pulley.

The present invention provides a structure of a fluid pressure elevator capable of preventing such a problem even if a counterweight is provided, and making the size of the car plane and the hoistway plane equal to those without the counterweight. It is in.

[0005]

Means for Solving the Problems Supply to a hydraulic cylinder,
Alternatively, in a hydraulic elevator of a type that controls the flow rate of the working fluid discharged from the hydraulic cylinder and controls the speed of the car, it is equipped with a balancing weight, and a pulley for hanging a rope hanging the balancing weight is connected to an axis of a hoistway plane. This is achieved by arranging at an angle with respect to.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram illustrating a schematic configuration of a cantilever type hydraulic elevator according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating a hoistway plane of FIG. 1 and 2
The embodiments of claims 1 and 2 will be described.

In FIGS. 1 and 2, reference numeral 1 denotes a car, 2 denotes a plunger, 3 denotes a cylinder, 4 denotes a fluid pressure cylinder comprising a plunger 2 and a cylinder 3. Reference numeral 5 denotes a rope for hanging the car 1 (hereinafter referred to as a car rope). One end is fixed to the car support plate 1A, and the other end is connected to a movable pulley 6 provided on the top of the plunger 2. It is fixed to the member 7 on the fluid pressure cylinder 4 side.

[0008] Further, reference numeral 8 denotes a rope for hanging a counterweight (hereinafter referred to as a rope for a counterweight).
A, and the other end is a beam 10 above the hoistway 100.
1 via a fixed pulley 9 provided on
It is fixed to 0.

The basic operation of the elevator will be described below.
A description will be given of the case of ascending operation. In the case of the descent operation, the reverse is true. When the working fluid is supplied to the cylinder 3, the plunger 2 rises at a speed corresponding to the flow rate, and the movable pulley 6
The car 1 rises via the car rope 5 related to. On the other hand, when the plunger 2 is lifted, the counterweight 10 is lowered via the counterweight rope 8 on the fixed pulley 9.

In FIG. 2, the car 1 is guided by a car guide rail 201 fixed to a rail bracket 200 via a guide device 202. The hydraulic cylinder 4 and the counterweight 10 are arranged on the back of the car 1.

The movable pulley 6 is incorporated in a movable pulley frame 203 fixed to the top of the plunger 2, and the movable pulley frame 203 is mounted on the rail brackets 204A and 204A.
It is guided via a guide device 206 to a plunger guide rail 205 fixed to 4B.

The counterweight 10 is a counterweight frame 2.
07, the counterweight frame 207 is guided via a guide device 209 to a counterweight guide rail 208 fixed to the rail brackets 204B and 204C.

In the figure, white circles indicate the car rope 5 and black circles indicate the balancing weight rope 8.

A fixed pulley 9 for hanging the counterweight rope 8 is disposed at an angle to the axis X of the hoistway plane.
FIG. 2 shows the size of the car and the hoistway plane of the fluid pressure elevator without the counterweight 10.
Therefore, the car 1, the guide rails 201, 205, 208,
This shows that devices such as the fluid pressure cylinder 4 and the counterweight 10 can be arranged.

If the fixed pulley 9 is arranged in parallel to the axis X of the hoistway plane without changing the car side suspension center C1 of the suspension weight rope 8 hanging on the fixed pulley 9, the following inconvenience occurs. Occur.

(1) If the counterweight 10 is left in the position shown in the figure, the counterweight of the counterweight 10 must be shifted to the left in the figure. In this case, the counterweight frame 2
An unbalanced load is generated in the guide device 209 of FIG. If the balance of the counterweight 10 is not changed, there occurs a problem that the counterweight rope 8 is easily detached from the fixed pulley 9.

(2) If the counterweight 10 is shifted to the left in the figure to prevent (1), the size of the hoistway plane must be increased in this direction or the depth of the car 1 must be reduced. .

FIG. 3 is a diagram illustrating a schematic configuration of a lift type hydraulic elevator according to one embodiment of the present invention, similarly to FIG. 1, and FIG. 4 is a diagram illustrating a hoistway plane of FIG. The third and fourth embodiments will be described with reference to FIGS.

3 and 4, the same components as those in FIGS. 1 and 2 are denoted by the same symbols, and only the differences from FIGS. 1 and 2 will be described. Since FIG. 3 is a lifting type, fixed pulleys 11 and 12 are provided below the car 1, two movable pulleys 6 </ b> A and 6 </ b> B are provided at the top of the plunger 6, and a fixed pulley 13 is provided below the cylinder 3. One end of the car rope 5 is connected to the hoistway 10
The other end is fixed to the member 7 on the fluid pressure cylinder 4 side via fixed pulleys 11 and 12, a movable pulley 6A, a fixed pulley 13, and a movable pulley 6B.

One end of the counterweight rope 8 is
The other end is fixed to the beam 101 via a movable pulley 14 disposed integrally on the movable pulleys 6A and 6B, and a fixed pulley 9 provided on the beam 101, and the other end is counterbalanced 10
It is fixed to.

FIG. 4 differs from FIG. 2 in that a beam 102 is added and that a hydraulic cylinder 4 and a counterweight 10 are arranged on the side of the car 1.
This means that one side of the rail bracket 200 in FIG. 2 has been replaced with 204D.

In FIG. 4, similarly to FIG. 2, a fixed pulley 9 for hanging the counterweight rope 8 is arranged at an angle to the axis Y of the hoistway plane. Further, FIG. 4 shows, similarly to FIG. 2, the size of the car and the hoistway plane of the hydraulic elevator without the counterweight 10. Therefore, it is shown that devices such as the car 1, the guide rails 201, 205, 208, the fluid pressure cylinder 4, and the counterweight 10 can be arranged in the hoistway without increasing the size of the hoistway plane.

If the fixed pulley 9 is arranged in parallel to the axis Y of the hoistway plane without changing the hanging point C2 of the rope 8 for balancing the movable pulley 14 and the fixed pulley 9, the following problems will occur. Occur.

(1) If the counterweight 10 is left at the position shown in the figure, the center of the counterweight 10 must be shifted upward in the figure. In this case, as in FIG.
An unbalanced load is generated in the guide device 209 of the counterweight frame 207.

(2) If the counterweight 10 is shifted to the upper side in the figure in order to prevent (1), the bracket 204D must be expanded in the vertical direction in the figure. Therefore, the size of the hoistway plane must be increased in this direction, or the size of the car 1 in the frontage direction must be reduced.

FIG. 5 is a diagram illustrating a schematic configuration of a lift type hydraulic elevator according to one embodiment of the present invention, similarly to FIG. 3, and FIG. 6 is a diagram illustrating a hoistway plane of FIG. Embodiments of the first and third aspects will be described with reference to FIGS.

In FIGS. 5 and 6, the same components as those in FIGS. 3 and 4 are represented by the same symbols, and only the differences from FIGS. 3 and 4 will be described.

FIG. 5 differs from FIG. 3 only in that a similar fixed pulley 9A is added to the fixed pulley 9 provided on the beam 101 in FIG. 6 differs from FIG. 4 in that the fixed pulleys 9 and 9A are arranged parallel to the axis Y of the hoistway plane, and the movable pulley 14 is arranged to be inclined with respect to the axis Y of the hoistway plane. That is.

FIG. 6 shows, similarly to FIG. 4, the size of the car and the hoistway plane of the hydraulic elevator in which the counterweight 10 is not provided. Therefore, it is shown that devices such as the car 1, the guide rails 201, 205, 208, the fluid pressure cylinder 4, and the counterweight 10 can be arranged in the hoistway without increasing the size of the hoistway plane.

If the movable pulley 14 is arranged in parallel to the axis Y of the hoistway plane without changing the hanging point C3 of the balancing weight rope 8 fixed to the beam 101, the following problem occurs. Occur.

(1) When the two fixed pulleys 9 and 9A and the counterweight 10 are kept at the positions shown in the drawing, the movable pulley 1
4 and the fixed pulley 9A are displaced from each other, so that the pulleys 14 and 9A are twisted and the counterweight rope 8 is easily disengaged.

(2) In order to prevent (1), the two fixed pulleys 9 and 9A are shifted upward in the figure, and
Is left in the illustrated position, an unbalanced load is generated in the guide device 209 of the counterweight frame 207 as in the case of FIG.

(3) If the counterweight 10 is further shifted upward in the drawing to prevent (1) and (2), the bracket 204D must be expanded in the vertical direction in the drawing. Therefore, the size of the hoistway plane must be increased in this direction, or the size of the car 1 in the frontage direction must be reduced.

As described above, by disposing the fixed pulley 9 or the movable pulley 14 on which the rope 8 for hanging the counterweight is inclined with respect to the axes X and Y of the hoistway plane, the weight of the counterweight rope 8 is reduced. The plane size of the car 1 and the plane size of the hoistway 100 can be made equal to those without a counterweight without shifting the balance.
A similar effect can be obtained with a hydraulic elevator provided with a counterweight other than the illustrated planar device arrangement. From the above,
It is not necessary to change the size of the car and the size of the hoistway when replacing the hydraulic elevator without the counterweight with the hydraulic elevator with the counterweight, of course.

[0035]

According to the present invention, by disposing the pulley on which the rope for hanging the counterweight is hung relative to the axis of the hoistway plane, it is possible to shift the counterweight of the counterweight and the car without shifting the center of gravity. The size of the car and the size of the hoistway can be made equal to those without a counterweight.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a schematic configuration of a cantilever type hydraulic elevator according to an embodiment of the present invention.

FIG. 2 is a plan view showing a hoistway of FIG. 1;

FIG. 3 is a diagram illustrating a schematic configuration of a lift type hydraulic elevator according to an embodiment of the present invention.

FIG. 4 is a plan view showing a hoistway of FIG. 2;

FIG. 5 is a diagram illustrating a schematic configuration of a lift type hydraulic elevator according to an embodiment of the present invention.

FIG. 6 is a plan view showing a hoistway of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Car 1A ... Car support plate 2 ... Plunger 3
... Cylinder, 4 ... Hydraulic cylinder, 5 ... Car rope, 6,6A, 6B ... Movable pulley, 7 ... Member, 8 ... Rope for counterweight, 9,9A, 11, 12, 13 ... Fixed pulley, 10: balance weight, 100: hoistway, 10
1,102... Beam, 200, 204A, 204B, 2
04C, 204D ... rail bracket, 201, 20
5,208 ... guide rails, 202, 206, 209 ...
Guide device, 203: movable pulley frame, 207: counterweight frame, X, Y: axis of hoistway plane, C1, C2,
C3: hanging point.

Continuing on the front page (72) Inventor Ichiro Nakamura 1070 Ma, Hitachinaka City, Ibaraki Prefecture Inside the Mito Plant, Hitachi, Ltd. (72) Inventor Eiichi Sasaki 1070 Ma, Hitachinaka City, Ibaraki Prefecture Inside the Mito Plant, Hitachi, Ltd. (72) Inventor Hidehiro Nakamura 1070 Ma, Hitachinaka City, Ibaraki Prefecture, Mito Plant, Hitachi, Ltd. Inventor Akio Ueno 832 Horiguchi, Hitachinaka-shi, Ibaraki Pref.Hitachi Mito Engineering Co., Ltd. (72) Inventor Takashi Fukuda 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside Hitachi Building Systems Co., Ltd. (72) Inventor Shigeto Kojima Hitachinaka, Ibaraki Takaba 2477 address stock company Hitachi car in Engineering

Claims (3)

[Claims] A hydraulic elevator of the type controlling the flow rate of a working fluid supplied to or discharged from a hydraulic cylinder and controlling the speed of a car, comprising a counterweight, and a counterweight. A hydraulic elevator wherein a pulley on which a vine rope is hung is disposed at an angle with respect to an axis of a hoistway plane. 2. The hydraulic elevator according to claim 1, wherein a fixed pulley on which a rope for hanging a counterweight is attached is inclined with respect to the axis of the hoistway plane. 3. The hydraulic elevator according to claim 1, wherein a movable pulley on which a rope for hanging a counterweight is hung is disposed at an angle to an axis of a hoistway plane.