JPH0526972U - Elevator balancer - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to correct the imbalance between the chain weight on the cage side and the tune weight on the counterweight side, and reduce the load on the chain drive device. [Structure] Cage 17 and fixed system 2 that can be lifted and lowered
Moving pulleys 25, 31 and constant pulleys 26, 29, 32, 34 for guiding the chain 21 connecting the two to turn up and down.
And a counterweight 36 hung on the movable pulleys 25 and 31 to balance with the weight of the cage 17,
The fixed system 3 is suspended from the counterweight 36.
8, the cage 17 is moved up and down to move the cage 17
And a balance chain 37 that increases or decreases the suspension length M according to the change in the chain length L that connects the fixed pulley 29 and the fixed pulley 29.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an elevator that raises and lowers a cage, and more particularly to an elevator balance device that can reduce the load on a drive unit that raises and lowers the cage.

[0002]

[Prior Art]

 It is known that a parking device for storing vehicles in multiple stages employs an elevator device for loading and unloading the vehicle. For example, the elevator device has a configuration as shown in FIG.

As shown in the figure, the elevator apparatus 1 is provided with a cage 2 for accommodating a vehicle and loading and unloading the vehicle so as to be vertically movable along a hoistway. One end of a chain 3 is connected to the cage 2, and the other end of the chain 3 is connected to a fixed system 4. A chain 3 which connects the cage 2 and the fixed system 4 is engaged with a movable pulley 5 and constant pulleys 6 and 7 which guide the chain 3 to be folded back up and down. A counterweight 8 is hung on the movable pulley 5 in order to balance the cage by balancing the weight of the cage 2.

A drive device 9 for moving the chain 3 to move the cage 2 up and down is provided between the constant pulleys 6 and 7. Since the drive unit 9 raises and lowers the counterweight 8 in the direction opposite to the raising and lowering of the cage 2, the weight of the cage 2 and the weight of the counterweight 8 balancing the cage 2 act on the drive unit 9 from the opposite directions at the same time. Become.

[0005]

[Problems to be solved by the device]

 By the way, as the cage 2 descends, the chain length S connecting the cage 2 and the constant pulley 7 ₁ Therefore, the weight of the chain on the side of the cage 3 acting on the drive device 9 increases. On the other hand, as the cage 2 descends, the chain length S connecting the fixed pulley 6 and the moving pulley 5₂The chain weight on the side of the counter weight 8 acting on the drive unit 9 becomes lighter because the length becomes shorter. Conversely, when the cage 2 rises, the chain length S on the cage 2 side is S₁Becomes shorter, and the chain length S on the counterweight 8 side₂Will be longer.

[0006] Thus, since the chain length S ₁ and Kauntau Eito 8 chain length of side S ₂ of the cage 2 side changes from one another by the lifting of the cage 2, the weight and counterweight of the cage-side 2 in the drive device 9 There is a problem in that the weight on the 8 side acts unbalanced and the load on the drive device 9 increases. In particular, parking devices tend to be higher in order to secure the number of vehicles that can be stored. As the lift of the cage 2 increases, the chain length S ₁ on the cage 2 side and the counterweight 8 side on the counterweight 8 side increase. There is a problem that the imbalance with the chain length S ₂ increases and the load acting on the drive device 9 also increases.

The present invention was devised to effectively solve the above problems.

The present invention aims to provide an elevator balancer capable of correcting the imbalance between the weight of the chain on the cage side and the weight of the chain on the counterweight side and reducing the load on the chain drive device. To aim.

[0009]

[Means for Solving the Problems]

 The present invention is directed to a movable pulley and a fixed pulley that guides a chain connecting a cage that is vertically movable and a fixed system so as to be folded back and forth, and a counter that is hung on the movable pulley to balance the weight of the cage. It is composed of a weight and a balance chain that is hung from the counterweight and engaged with a fixed system and that connects the cage and the fixed pulley by raising and lowering the cage and that increases or decreases the hanging length according to the change in the chain length. Is.

[0010]

[Action]

 In this way, the suspension length of the counterweight changes according to the amount of elevation of the cage.When the chain length on the cage side increases, the suspension length on the balance chain also increases, while on the other hand, when the chain length on the cage side decreases. The hanging length of the counter weight is also shortened. Therefore, the unbalance between the chain weight on the cage side and the chain weight on the counterweight side, which changes as the cage moves up and down, is corrected by the suspension length of the balance chain. Therefore, a constant load always acts on the drive device that moves the chain.

[0011]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows an elevator type parking apparatus according to the present invention. As shown in the figure, in this parking device 11, storage shelves 14 for mounting vehicles 12 on a pallet 13 and storing the pallets 13 in multiple stages are formed at equal intervals in the vertical direction. An elevator device 15 for loading and unloading 12 is provided. The elevator device 15 is provided with a cage 17 that is vertically guided along a hoistway 16 for transferring the vehicle 13, and is provided with a pair of chain transmission devices 18 and 19 for moving the cage 17 up and down. There is.

The chain transmission device 18 will be described. As shown in FIG. 1, the chain transmission device 18 is provided with a chain 21 for suspending the cage 17 so that the cage 17 can be lifted and lowered. 17 has a first chain 23 connected to one end in the longitudinal direction of the cage 17 and the other end of which is locked to the fixed system 22, one end of which is connected to the other end of the cage 17 in the longitudinal direction and the other end thereof. It is composed of a second chain 24 locked to the fixed system 22. In the middle of the first chain 23, a moving pulley 25, a fixed pulley 26, an intermediate pulley 27, a driving pulley 28, and a constant pulley 29 are sequentially engaged from the fixed system 22 side so as to guide the folded back up and down. .. A movable pulley 31, a constant pulley 32, a drive pulley 33, and a constant pulley 34 are sequentially engaged with the second chain 24 from the fixed system 22 side. The other chain transmission device 19 has the same structure, and the same members are designated by the same reference numerals.

The drive pulleys 28, 28, 32, 32 are arranged coaxially and driven by a drive unit 35. The drive unit 35 is composed of a speed reducer and a drive motor.

Further, a counterweight 36 for suspending the weight of the cage 17 is suspended from each movable pulley 25, 31. Therefore, the drive of the drive device 35 causes the counterweight 36 to move up and down in the direction opposite to the direction in which the cage 17 moves up and down. For example, the weight of the counterweight 36 is set by cage weight + (vehicle weight + pallet weight) / 2.

In particular, a pair of balance chains 37 are suspended on the counterweight 35. The balance chain 37 is configured such that the suspension length M below the counterweight 36 is increased / decreased according to the change in the chain length L connecting the cage 17 and the fixed pulley 29 as the cage 17 is moved up and down. In the present embodiment, one end of the balance chain 37 is connected to the lower part of the counterweight 36 and is hung downward from the counterweight 36 by its own weight and folded back upward so that the other end is locked by the fixed system 38. Is becoming.

Since the balance chain 37 is connected to the movable pulleys 25 and 31 via the counterweight 36 in this manner, the suspension length M of the balance chain 37 is half the amount of ascent of the cage 17 and the cage It is twice as much as the fall of Ji 17. Therefore, the weight of the suspension length M that changes according to the amount of elevation of the cage 17 acts on the drive device together with the weight of the counter weight 36.

Next, the operation of the embodiment will be described.

FIG. 3 and FIG. 4 are simplifications of FIG. 1. FIG. 3 shows the case where the cage 17 is raised, and FIG. 4 shows the case where the cage 17 is lowered.

As shown in FIG. 3, when the cage 17 is raised, the chain length L ₁ connecting the cage 17 and the fixed pulley 29 is shortened, and the fixed pulleys 26, 32, 34 and the moving pulleys 25, 31 are moved. The chain length N ₁ connecting to and becomes longer, and the suspension length M ₁ of the balance chain 37 becomes shorter. Therefore, the cage 17 and the fixed pulley 29 and Weight W ₁ of the chain length L ₁ connecting the fixed pulley 26, 32, 34 and the movable pulley 25 and 31 and the weight W ₂ of the chain length N ₁ which connects the, the balance chain 37 The relationship of the weight W _{3 for} the suspension length M ₁ is W ₁ = W ₂ + W ₃ .

On the other hand, as shown in FIG. 4, when the cage 17 descends, the chain length L ₂ on the cage 17 side increases, the chain length N ₂ on the counter weight 36 side decreases, and the suspension length of the balance chain 37 decreases. M ₂ becomes longer, and the relationship of these weights is W ₁₁ = W ₁₂ + W ₁₃ .

As described above, according to the present invention, the chain weight on the cage 17 side and the chain weight on the counter weight 36 side are changed by the raising and lowering of the cage 17 regardless of whether the cage 17 is raised or lowered. This is offset by the weight of the balance chain 37. Therefore, the load of the drive device 35 for moving the chain 21 is always constant, and the drive device 35 such as a drive motor can be downsized and have a long service life.

In the above embodiment, one end of the balance chain 37 is connected to the counter weight 36 and the other end is connected to the fixed system 38. However, the present invention is not limited to this. The balance chain 37 may be configured such that the upper end thereof is connected to the counterweight 36 and is hung linearly below the counterweight 36. In this case, a fixed system 38 is provided immediately below the counterweight 36 that moves up and down at a predetermined interval, and the lower end of the balance chain 37 is brought into contact with the fixed system 38. Therefore, the counterweight 36 and the fixed system 38 directly below the counterweight 36 are linearly connected by the balance chain 37, and the distance between the ascending / descending counterweight 36 and the fixed system 38 is the suspension length M of the balance chain 37. Becomes

[0024]

[Effect of the device]

 In summary, according to the present invention, the balance chain weight is used to offset the unbalance between the cage-side chain weight and the counterweight-side chain weight, which change when the cage moves up and down. The load on the driving device can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an elevator apparatus of the present invention.

FIG. 2 is a diagram showing an elevator parking device.

FIG. 3 is a schematic view showing an elevator apparatus with a cage raised.

FIG. 4 is a schematic view showing the elevator apparatus with the cage lowered.

FIG. 5 is a schematic view showing a conventional elevator apparatus.

[Explanation of symbols]

 17 Cage 22 Fixed system 25, 31 Moving pulley 26, 29, 32, 34 Constant pulley 36 Counterweight 37 Balance chain 38 Fixed system L Cage side chain length L Counterweight side chain length M Balance chain

Front page continuation (72) Inventor Mitsuo Ito 1-1 Kandaogawamachi, Chiyoda-ku, Tokyo Ishikawajima Transporter Co., Ltd. (72) Inventor Katsumura Murata 1-1, Kandaogawamachi, Chiyoda-ku, Tokyo Ishikawajima Transporter Within the corporation

Claims (1)

[Scope of utility model registration request] 1. A moving pulley and a fixed pulley for guiding a chain connecting a vertically movable cage and a fixed system to be folded back up and down, and a counter hung on the moving pulley to balance the weight of the cage. A weight and a balance chain that is suspended from the counterweight and is engaged with a fixed system and that increases or decreases the suspension length according to the change in the chain length that connects the cage and the constant pulley by the elevation of the cage. Elevator balancer characterized by.