Elevator

Abstract

To provide an elevator 1 capable of suppressing the easy increase of resonance in a structure for supporting the upper part of a hoist 5 from the side via an elastic body 26.SOLUTION: An elevator 1 comprises: a hoist 5; an upper part support member 25 that supports the upper part of the hoist 5 from the side; and an elastic body 26 disposed between the hoist 5 and the upper part support member 25. The elastic body 26 is fixed at one surface to one of the hoist 5 and the upper part support member 25, and disposed at the other surface to face the other member without being fixed to the other member of the hoist 5 and the upper part support member 25.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an elevator. [Background technology]

[0002] Patent Document 1, for example, is an example of technology relating to a structure for supporting an elevator hoist.

[0003] Figures 2 to 4 and paragraphs 0021 to 0022 of Patent Document 1 describe that the side of the upper part (43) of the hoist (4) is connected to an upper fixing member (51) by a connecting member with a vibration-proof member (61) sandwiched therebetween, thereby fixing the position of the hoist (4). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-137511 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, even when the upper part of the hoist is fixed and supported from the side via an elastic body that serves as a vibration-isolating member as in Patent Document 1, there is a problem that if the rotational frequency of the hoist and the eigenvalue of the hoist support structure match, vibrations may become large due to resonance.

[0006] The problem to be solved by the present invention is to provide an elevator that can suppress the tendency for resonance to increase in a structure in which the upper part of the hoisting machine is supported from the side via an elastic body. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the elevator of the present invention comprises a hoist, an upper support member that supports the upper part of the hoist from the side, and an elastic body arranged between the hoist and the upper support member, and is characterized in that one surface of the elastic body is fixed to one of the hoist and the upper support member, and the other surface of the elastic body is not fixed to the other of the hoist and the upper support member and is arranged facing the other member. Effect of the Invention

[0008] According to the present invention, it is possible to realize an elevator that can suppress the tendency for resonance to increase in a structure in which the upper part of the hoisting machine is supported from the side via an elastic body. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a conceptual diagram illustrating the overall schematic configuration of an elevator according to an embodiment. [Diagram 2] FIG. [Diagram 3] FIG. 3 is a front view seen from direction A in FIG. 2. [Figure 4] Cross-sectional view taken along line B-B in Figure 2. [Diagram 5] Cross-sectional view taken along line B-B in Figure 2. [Figure 6] FIG. 4 is a diagram illustrating an example of an elastic body used in the elevator of the embodiment. [Figure 7] 13 is a waveform diagram illustrating the force of the vibration component applied to the elastic body of the elevator of the comparative example. [Figure 8] FIG. 4 is a waveform diagram illustrating the force of the vibration component applied to the elastic body of the elevator of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, the same or similar components are designated by the same reference numerals, and duplicated explanations will be omitted.

[0011] FIG. 1 is a conceptual diagram for explaining the overall schematic configuration of an elevator according to an embodiment.

[0012] The elevator 1 of the embodiment is installed in a hoistway 2 of a building 100. The elevator 1 has, for example, a car 3, a counterweight 4, a hoist 5, a main rope 6, a car guide rail 7, and a counterweight guide rail 8.

[0013] The car 3 is a passenger car on which passengers and baggage are carried, for example. The car 3 is connected to the main rope 6 via, for example, a car pulley 3A. The counterweight 4 is a weight for balancing the car 3. The counterweight 4 is connected to the main rope 6 via, for example, a counterweight pulley 4A. The hoist 5 is disposed at the upper part of the hoistway 2. The hoist 5 has a sheave 5A around which the main rope 6 is wound, and the car 3 and the counterweight 4 are moved in accordance with the movement of the main rope 6 by rotating the sheave 5A. The car guide rail 7 is a guide rail that guides the movement of the car 3. The counterweight guide rail 8 is a guide rail that guides the movement of the counterweight 4. Note that the roping method shown in FIG. 1 is merely an example, and is not limited thereto.

[0014] Next, a specific configuration of the elevator 1 of the embodiment will be described. Note that, since Fig. 1 is merely a conceptual diagram for explaining the overall schematic configuration of the elevator 1, the layouts in Figs. 2 to 5 shown below do not strictly match Fig. 1.

[0015] Fig. 2 is a top view of the elevator of the embodiment. Fig. 3 is a front view seen from the direction A in Fig. 2. Figs. 4 and 5 are BB cross-sectional views of Fig. 2.

[0016] As shown in Figures 2 to 5, the hoist 5 is a thin hoist having a thickness dimension T that is smaller than the height dimension H and width dimension W of the surface on which the sheave 5A is arranged, and is arranged between the car 3 and the wall of the elevator shaft 2, as shown in Figure 2.

[0017] As shown in Fig. 3, the hoist 5 is supported by a hoist support structure 20. The hoist support structure 20 of this embodiment has a lower support member 21, a hoist support bracket 22, a hoist fixing base 23, a lower elastic body 24, an upper support member 25, and an elastic body 26.

[0018] The lower support member 21 is a beam connected between the two counterweight guide rails 8 via a hoisting machine support bracket 22. A hoisting machine fixing base 23 is fixed to the upper surface of the lower support member 21. The hoisting machine 5 is fixed onto the hoisting machine fixing base 23 via a lower elastic body 24, which is a vibration-proof member. In this way, the lower support member 21 supports the hoisting machine 5 from below.

[0019] As shown in Fig. 4, a downward load 31 is applied to the sheave 5A of the hoisting machine 5 via the main rope 6, causing the hoisting machine 5 to tilt toward the sheave 5A, generating a displacement 32. Also, as shown in Fig. 5, when the sheave 5A of the hoisting machine 5 rotates, vibrations 33 are generated in the hoisting machine 5 due to eccentricity of the shaft of the sheave 5A, etc. For this reason, in this embodiment, an upper support member 25 and an elastic body 26 are provided.

[0020] The upper support member 25 is a bracket for preventing the hoist from falling, which is fixed to the car guide rail 7 or the counterweight guide rail 8. As shown in Figs. 2, 4, and 5, an elastic body 26 is disposed between the hoist 5 and the upper support member 25. The upper support member 25 is disposed opposite to the surface on which the sheave 5A of the hoist 5 is disposed, via the elastic body 26. The upper support member 25 supports the upper part of the hoist 5 from the side, thereby preventing the hoist 5, which is a thin hoist, from falling, and the elastic body 26, which is a vibration-proof member, suppresses the transmission of vibration from the hoist 5, which is a vibration source, to the hoist support structure 20, the car guide rail 7, and the counterweight guide rail 8. In this embodiment, an example is shown in which one of the two upper support members 25 is fixed to the car guide rail 7 and the other is fixed to the counterweight guide rail 8, but the number, position, and fixing destination of the upper support members 25 are not limited to this.

[0021] Here, the elastic body 26 in this embodiment is configured such that one surface is fixed to one of the hoisting machine 5 and the upper support member 25, and the other surface is not fixed to the other of the hoisting machine 5 and the upper support member 25, but is disposed facing the other member. That is, the elastic body 26 is fixed on one surface, not on both surfaces. The effect of this will be described later with reference to Figs. 7 and 8. Note that Figs. 2 to 5 show, as an example, an example in which the elastic body 26 is fixed to the upper support member 25, and is not fixed to the hoisting machine 5 side.

[0022] FIG. 6 is a diagram illustrating an example of an elastic body used in the elevator of the embodiment.

[0023] Plate-shaped members 27, for example, made of a metal plate, are attached to one surface and the other surface of the elastic body 26 in this embodiment. One of the two plate-shaped members 27 is provided with a connecting and fixing part 28, for example, made of a male screw. The elastic body 26 in this embodiment is fixed to the upper support member 25 via the plate-shaped member 27 and the connecting and fixing part 28. The other plate-shaped member 27, which is not provided with the connecting and fixing part 28, is not fixed to the hoisting machine 5 and is merely brought into contact with the hoisting machine 5. As a result, the elastic body 26 is disposed facing the hoisting machine 5 via the plate-shaped member 27 without being fixed to the hoisting machine 5.

[0024] 6, there may be only one plate-shaped member 27, or no plate-shaped member 27 may be used. Also, fixing may be performed without using the connecting and fixing part 28. For example, without using the plate-shaped member 27 and the connecting and fixing part 28, the elastic body 26 may be fixed by being affixed to the upper support member 25 with, for example, an adhesive, or the elastic body 26 may be brought into direct contact with the hoisting machine 5.

[0025] Next, the effect of fixing the elastic body 26 of this embodiment on one side instead of both sides will be described with reference to FIGS.

[0026] Fig. 7 is a waveform diagram explaining the force of the vibration component applied to the elastic body of the elevator of the comparative example. In Fig. 7, the horizontal axis is time t, and the vertical axis is force F applied to elastic body 26. Fig. 7 corresponds to a diagram in which the force of the vibration component due to vibration 33 shown in Fig. 5 is extracted from the force F applied to elastic body 26, excluding the steady force due to the tilt displacement 32 shown in Fig. 4.

[0027] In the comparative example shown in FIG. 7, the elastic body 26 is fixed to both the upper support member 25 and the hoisting machine 5. That is, the comparative example is an example in which the elastic body 26 is fixed on both sides. In the comparative example, with the occurrence of vibration 33 caused by the rotation of the sheave 5A of the hoisting machine 5, a compressive force 34 is periodically applied to the elastic body 26 from the hoisting machine 5 when the hoisting machine 5 is displaced in a direction toward the upper support member 25, and a tensile force 35 is periodically applied to the elastic body 26 from the hoisting machine 5 when the hoisting machine 5 is displaced in a direction away from the upper support member 25. As a result, in the case of double-sided fixing as in the comparative example, a simple primary resonance state occurs, and there is a problem that the resonance is likely to increase.

[0028] Fig. 8 is a waveform diagram for explaining the force of the vibration component applied to the elastic body of the elevator of the embodiment. Fig. 8 is a diagram corresponding to Fig. 7.

[0029] In the case where the elastic body 26 is fixed on one side as in this embodiment, as shown in Fig. 8, a compressive force 34 is applied to the elastic body 26 from the hoist 5 when the hoist 5 is displaced in a direction toward the upper support member 25, and a tensile force 35 is not applied to the elastic body 26 from the hoist 5 when the hoist 5 is displaced in a direction away from the upper support member 25. This makes it possible to create a complex resonance state rather than a simple primary resonance state, thereby suppressing the tendency for the resonance to increase.

[0030] In this case, it is assumed that the hoist 5 and the plate-like member 27 (or the elastic body 26 when the plate-like member 27 is not provided) vibrate while remaining in contact with each other, but the present invention is not limited to this, and the hoist 5 and the plate-like member 27 (or the elastic body 26 when the plate-like member 27 is not provided) may be separated during the vibration. In this case, the application of the tensile force 35 can be more reliably suppressed.

[0031] In addition, the method of one-sided fixing has been described here in which the elastic body 26 and the upper support member 25 are fixed, but the method is not limited to this. In the case where the elastic body 26 and the hoisting machine 5 are fixed and the elastic body 26 and the upper support member 25 are not fixed as the method of one-sided fixing, a compressive force 34 is applied to the elastic body 26 from the upper support member 25 when the hoisting machine 5 is displaced in a direction toward the upper support member 25, and a tensile force 35 is not applied from the upper support member 25 when the hoisting machine 5 is displaced in a direction away from the upper support member 25. This similarly makes it possible to achieve a complex resonance state rather than a simple primary resonance state, thereby suppressing the tendency for resonance to increase.

[0032] As described above, according to the elevator 1 of this embodiment, it is possible to suppress the tendency for resonance to increase in a structure in which the upper part of the hoisting machine 5 is supported from the side via the elastic body 26.

[0033] Although the embodiment of the present invention has been described above, the present invention is not limited to the configurations described in the embodiment, and various modifications are possible within the scope of the technical concept of the present invention. In addition, some or all of the configurations described in the embodiment may be combined and applied. [Explanation of symbols]

[0034] 1: Elevator 2: Lift 3: Basket 3A: Cage pulley 4: Counterweight 4A: Counterweight pulley 5:Hoisting machine 5A: Sheave 6: Main rope 7: Basket guide rail 8: Counterweight guide rail 20: Hoisting machine support structure 21: Lower support member 22: Hoist support bracket 23:Hoisting machine fixing base 24: Lower elastic body 25: Upper support member 26: Elastic body 27: Plate-shaped member 28:Connection fixing part 31: Load 32: Falling Displacement 33: Vibration 34: Compression force 35: Tensile force 100: Building H: Height dimension W: Width dimension T: Thickness dimension

Claims

1. A hoisting machine; An upper support member that supports an upper portion of the hoist from a side; An elastic body disposed between the hoist and the upper support member, An elevator characterized in that one surface of the elastic body is fixed to one of the hoist and the upper support member, and the other surface of the elastic body is positioned opposite the other of the hoist and the upper support member without being fixed to the other member.

2. In claim 1, An elevator characterized in that a compressive force is applied to the elastic body from the other member when the hoist is displaced in a direction toward the upper support member, and no tensile force is applied to the elastic body from the other member when the hoist is displaced in a direction away from the upper support member.

3. In claim 1, An elevator characterized by having a plate-shaped member arranged at least either between the one surface of the elastic body and the one member, or between the other surface of the elastic body and the other member.

4. In claim 1, The elevator is characterized in that the hoisting machine is disposed at an upper portion of the hoistway.

5. In claim 1, The hoisting machine has a sheave around which a main rope is wound, The elevator is characterized in that the hoist is a thin hoist having a thickness dimension smaller than the height and width dimensions of the surface on which the sheaves are arranged.

6. In claim 5, An elevator characterized in that the upper support member is arranged opposite the surface on which the sheave of the hoisting machine is arranged, via the elastic body.

7. In claim 1, An elevator characterized in that the elastic body has one surface fixed to the upper support member.

8. In claim 1, A lower support member that supports the hoist from below; An elevator characterized by having a lower elastic body provided between the lower support member and the hoisting machine.

9. In claim 1, Basket, A counterweight, a main rope that moves the cage and the counterweight and is wound around the hoist; a car guide rail for guiding the movement of the car; and a counterweight guide rail for guiding the movement of the counterweight, An elevator characterized in that the upper support member is fixed to the car guide rail or the counterweight guide rail.

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