Elevator device

Abstract

To provide an elevator device capable of lowering a position of a car by releasing a brake in the event of a malfunction.SOLUTION: An elevator device according to the present disclosure includes a car, a long body that suspends the car, a hoist having a sheave around which the long body is wound, and a counterweight suspended from the opposite side of the long body. The counterweight has a two-part structure that can be separated into a first weight and a second weight. The long body is connected to the first weight. The second weight can be removed from the first weight. The counterweight cannot be separated at any point other than the division between the first weight and the second weight.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to elevator systems. [Background technology]

[0002] The following Patent Document 1 discloses a counterweight for a rope-type elevator which includes an upper bar to which a main rope is attached for suspending a weight, grooves provided on the underside of the upper bar and the underside of the weight, and a hook provided on the upper surface of the weight that fits into the groove to connect the weight and suspend it from the upper bar. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-250959 Summary of the Invention [Problem to be solved by the invention]

[0004] In an elevator where the control panel and hoist are installed at the top of the hoistway, if the inverter, circuit board, or equipment fails while the car is at the top floor, the car must be lowered to access the control panel and hoist. However, because the counterweight is heavier than the car, there is a problem in that the car cannot be lowered by simply releasing the brake.

[0005] The present disclosure has been made to solve the above-mentioned problems. An object of the present disclosure is to provide an elevator device that is capable of lowering the position of the car by releasing the brake in the event of a malfunction. [Means for solving the problem]

[0006] The elevator apparatus according to the present disclosure comprises a car, a long body for suspending the car, a hoist having a sheave around which the long body is wound, and a counterweight suspended from the opposite side of the long body, the counterweight having a two-part structure that can be separated into a first counterweight and a second counterweight, the long body being connected to the first counterweight such that the second counterweight can be removed from the first counterweight, and the counterweight cannot be separated anywhere other than at the division between the first counterweight and the second counterweight. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide an elevator device capable of lowering the position of the car by releasing the brake in the event of a malfunction. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a side view illustrating an example of an elevator device. [Diagram 2] FIG. 1 is a side view illustrating an example of an elevator device. [Diagram 3] FIG. 1 is a perspective view showing an example of a counterweight. [Figure 4] FIG. 13 is a front view showing another example of a counterweight. [Diagram 5] FIG. 11 is a side view showing another example of the first fixing means. [Figure 6] 5 is a cross-sectional side view of a second fixing means provided on the counterweight shown in FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments will be described with reference to the drawings. In each drawing, the same reference numerals are used to denote common or corresponding elements, and the description is simplified or omitted. The configurations shown in the embodiments below are examples of the technical ideas related to the present disclosure, and may be combined with other known technologies, or multiple technical ideas described in the present disclosure may be combined. In addition, it is also possible to omit or modify a part of the configuration without departing from the gist of the present disclosure.

[0010] Embodiment 1 1 and 2 are side views showing an example of an elevator device. As shown in Fig. 1, the elevator device 1 includes a car 2, a long body 3 that suspends the car 2, a hoist 5 having a sheave 4 around which the long body 3 is wound, and a counterweight 6 suspended from the side of the long body 3 opposite to the car 2.

[0011] The car 2 moves up and down in the hoistway 9. In Fig. 1 and Fig. 2, the car 2 is located on the top floor. The counterweight 6 moves up and down in the hoistway 9 in a direction opposite to the direction in which the car 2 moves. The car 2 and the counterweight 6 are suspended in the hoistway 9 by a flexible long body 3. The long body 3 may be, for example, a rope-like or belt-like body.

[0012] The hoist 5 is a device for driving the car 2. The long body 3 is wound around the sheave 4 of the hoist 5. Although not shown in the figure, the hoist 5 includes a motor for rotating the sheave 4, an encoder such as a resolver for outputting a signal according to the rotation angle of the sheave 4, and a brake device for holding the sheave 4 stationary.

[0013] The hoisting machine 5 is controlled by a control panel 10. That is, the movement of the car 2 is controlled by the control panel 10. Figure 1 shows an example in which the hoisting machine 5 and the control panel 10 are installed at the top of the hoistway 9.

[0014] The counterweight 6 has a two-piece structure that can be separated into a first weight 7 and a second weight 8. The long body 3 is connected to the first weight 7. The second weight 8 can be removed from the first weight 7. The first weight 7 corresponds to the upper half of the counterweight 6. The second weight 8 corresponds to the lower half of the counterweight 6.

[0015] In the example of Fig. 1 and Fig. 2, the weight of the counterweight 6 is 500 kg in total, the weight of the first weight 7 is 230 kg, and the weight of the car 2 is 250 kg. When the second weight 8 is removed from the first weight 7, the weight of the car 2 becomes heavier than the first weight 7. Therefore, when the brake of the hoisting machine 5 is released from the state in which the car 2 is at the top floor as shown in Fig. 2, the car 2 moves down by its own weight. As a result, a maintenance worker can get on the car and access the hoisting machine 5 and the control panel 10. This eliminates the need to stack weights inside the car 2 or jack up the counterweight 6 in the pit. During the restoration work, a rise / fall prevention plate is attached to the main rail part.

[0016] The weight of the first weight 7 is lighter than the weight of the car 2. The weight of the first weight 7 is preferably about 10% lighter than the weight of the car 2, for example, 0.8 to 0.95 times.

[0017] The counterweight 6 has a structure that does not allow it to be separated at any point other than the division portion into the first weight 7 and the second weight 8. This has the advantage that the structure of the counterweight 6 is simplified and there is no risk of dividing the counterweight 6 in the wrong position.

[0018] Fig. 3 is a perspective view showing an example of a counterweight 6. The counterweight 6 of the example shown in Fig. 3 is provided with a first fixing means 11 for fixing the second weight 8 to the first weight 7, and a second fixing means 12 for fixing the second weight 8 to the first weight 7. The first fixing means 11 has a bolt protruding vertically downward on the first weight 7. The bolt is inserted into a hole formed on the upper surface of the second weight 8, and a nut is fastened to the bolt. Such first fixing means 11 allows the second weight 8 to be fixed to the first weight 7 without rattling, thereby preventing the generation of vibration and noise.

[0019] In the example of Fig. 3, by providing second fixing means 12 in addition to the first fixing means 11, the second weight 8 can be fixed more reliably to the first weight 7. The second fixing means 12 is provided on both sides of the first fixing means 11. The second fixing means 12 has a rotating hook provided on the second weight 8. The hook engages with a recess provided on the first weight 7, thereby locking the second fixing means 12.

[0020] When removing the second weight 8 from the first weight 7, the nut of the first fixing means 11 is loosened and removed, and the lock of the second fixing means 12 is released. The removed second weight 8 is placed at the lower end of the pit.

[0021] 3, a pin 13 is provided which penetrates the first weight 7 in the vertical direction. The pin 13 penetrates the second weight 8 to a position halfway through. The pins 13 are provided on both the left and right sides.

[0022] In the example of FIG. 3, the first weight 7 is provided with an eyebolt 14 as a first attachment part to which a hook of a chain block can be attached, and the second weight 8 is provided with an eyebolt 15 as a second attachment part to which a hook of a chain block can be attached. When attaching or detaching the second weight 8 to or from the first weight 7, the second weight 8 can be lifted using the chain block attached between the eyebolts 14 and 15, so that the work can be performed more safely. In the illustrated example, the eyebolts 14 and 15 are provided on the side, but the eyebolts 14 and 15 may be provided on the front. Also, the eyebolts 14 and 15 may be provided on the left and right sides, respectively. The eyebolts 14 and 15 are removable, and the eyebolts 14 and 15 can be removed when not in use.

[0023] Fig. 4 is a front view showing another example of the counterweight 6. In the example shown in Fig. 4, eyebolts 14, 15 are provided on the left and right sides, respectively. In the example shown, the eyebolts 14, 15 are depicted as protruding in the lateral direction, but in reality the eyebolts 14, 15 may be provided so as to protrude toward the front side. In the example of Fig. 4, the first fixing means 11 has a structure similar to that of the example of Fig. 3.

[0024] In the example of FIG. 4, the second fastening means 12 is illustrated in only one place, but in reality, the second fastening means 12 may be provided in two or more places.

[0025] Fig. 5 is a side view showing another example of the first fixing means 11. In the example of Fig. 5, a hole formed in a connecting part 16 having a T-shaped cross section provided on the first weight 7 and a hole formed in a connecting part 17 having a U-shaped cross section provided on the second weight 8 are overlapped, and a pin 18 is inserted into the hole. A snap pin 19 is attached to the tip of the pin 18 to prevent it from coming off.

[0026] Fig. 6 is a cross-sectional side view of the second fixing means 12 provided in the counterweight 6 shown in Fig. 4. The second fixing means 12 in Fig. 6 has a rotating part 20 rotatably attached to the second weight 8, and a bolt 21 inserted into a hole at the tip of the rotating part 20. The tip of the bolt 21 is screwed into a threaded hole formed in a pin 13 that penetrates the first weight 7 in the vertical direction. With such second fixing means 12, it is possible to fix the second weight 8 to the first weight 7 without rattling by tightening the bolt 21, so that the generation of vibrations and noise can be more reliably suppressed.

[0027] After the second weight 8 is removed from the first weight 7 and the work is completed, the car is operated at a low speed to move up and position the first weight 7 above the second weight 8. Then, the first fixing means 11 and the second fixing means 12 are locked to fix the second weight 8 to the first weight 7. At this time, the second weight 8 may be lifted using a chain block attached between the eye bolts 14 and 15.

[0028] Various aspects of the present disclosure are summarized below as appendices.

[0029] (Appendix 1) Basket, A long body for suspending the cage; A hoist having a sheave around which the elongated body is wound; The cage of the elongated body has a counterweight suspended on the opposite side; Equipped with The counterweight has a two-part structure that can be separated into a first weight and a second weight, The elongated body is connected to the first weight, the second weight is detachable from the first weight; An elevator apparatus, wherein the counterweight is not separable at any point other than a division portion between the first weight and the second weight. (Appendix 2) 2. The elevator apparatus according to claim 1, wherein a weight of the first weight is lighter than a weight of the car. (Appendix 3) 3. The elevator apparatus according to claim 1 or 2, further comprising a first fixing means for fixing the second weight to the first weight. (Appendix 4) 4. The elevator apparatus of claim 3, further comprising a second fixing means for fixing the second weight to the first weight. (Appendix 5) a first attachment portion provided on the first weight and capable of attaching a hook of a chain block; a second attachment portion provided on the second weight and capable of attaching a hook of the chain block; 5. The elevator apparatus according to claim 1, further comprising: [Explanation of symbols]

[0030] REFERENCE SIGNS LIST 1 elevator device, 2 car, 3 long body, 4 sheave, 5 hoist, 6 counterweight, 7 first weight, 8 second weight, 9 hoistway, 10 control panel, 11 first fixing means, 12 second fixing means, 13 pin, 14 eyebolt, 15 eyebolt, 16 connecting portion, 17 connecting portion, 18 pin, 19 snap pin, 20 rotating portion, 21 bolt

Claims

1. Basket, A long body for suspending the cage; A hoist having a sheave around which the elongated body is wound; The cage of the elongated body has a counterweight suspended on the opposite side; Equipped with The counterweight has a two-part structure that can be separated into a first weight and a second weight, The elongated body is connected to the first weight, the second weight is detachable from the first weight; An elevator apparatus, wherein the counterweight is not separable at any point other than a division portion between the first weight and the second weight.

2. 2. The elevator apparatus according to claim 1, wherein a weight of the first weight is less than a weight of the car.

3. 3. The elevator apparatus according to claim 1, further comprising a first fixing means for fixing the second weight to the first weight.

4. 4. The elevator apparatus according to claim 3, further comprising second fastening means for fastening said second weight to said first weight.

5. a first attachment portion provided on the first weight and capable of attaching a hook of a chain block; a second attachment portion provided on the second weight and capable of attaching a hook of the chain block; The elevator apparatus according to claim 1 or 2, further comprising:

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