JP4759260B2 - Manual drive device for elevator hoisting machine - Google Patents

Description

  The present invention relates to a manual drive device for an elevator hoisting machine capable of manually driving a car at the time of installation work or failure of the elevator.

  FIG. 6 is a side view showing a conventional manual drive device for an elevator hoist.

  In FIG. 6, 30 is a machine beam, 31 is an electric motor supported by the machine beam 30, 32 is integrally attached to a drive shaft 31a of the electric motor 31, and a sheave on which a rope (not shown) for suspending an elevator car is wound. , 33 is supported by the machine beam 1 and is connected to the sheave 32 via the chain 34, 35 is a magnetic brake that brakes the sheave 32, and 36 is a torque that is attached to the drive shaft 31a during manual operation. An output sprocket 37 is a base mounted on the machine beam 30 during manual operation, 38 is a torque input sprocket provided on the base 37, 39 is a chain wound around the torque output sprocket 36 and the torque input sprocket 38, 40 Consists of three arms that are attached to the base 37 and spread radially. Handle to rotate the force sprocket 38, 41 is a handle pipe to be fitted to the arms of the handle 40.

When the elevator is operated manually, the torque output sprocket 36 is attached to the drive shaft 31a, the base 37 is attached to the machine beam 30, and then the chain 39 is wound around the torque output sprocket 36 and the torque input sprocket 38. Multiply. Then, the handle pipe 41 is fitted to one arm of the handle 40, and the handle pipe 41 is gripped and the handle 40 is rotated, so that the torque input sprocket 38, the chain 39, and the torque output sprocket 36 are passed through. The sheave 32 of the electric motor 31 is interlocked at a low speed, and the car suspended on the sheave 32 is moved (see, for example, Patent Document 1).
JP 2000-63063 A

  However, in the above-described conventional manual drive device for an elevator hoist, in the case of a long process elevator or an elevator with a large car mass, a large rotational force is required to drive the sheave 32 manually. A large reaction force is also generated in the torque input sprocket 38. Therefore, large-scale reinforcement of the base 37 and the machine beam 30 that are the attachment portions of the torque input sprocket 38 is required.

Further, structurally, since the chain 39 can not extremely increase the torque reduction ratio of the two sprockets 36 and 38 is wound, to rotate the torque input sprocket 38 requires a large input torque. In order to reduce the operating force while obtaining this input torque, a relatively long handle pipe 41 is conventionally fitted to the handle 40. However, if the mounting space for the handle pipe 41 cannot be secured, There is a problem that the manual drive device according to this structure cannot be used.

  The present invention has been made from the above-described situation in the prior art, and an object of the present invention is to provide a manual drive device for an elevator hoisting machine that can reduce reaction force and operation force acting on a structure during manual operation. It is to provide.

An elevator hoisting machine having an electric motor mounted on a machine beam and a sheave integrally attached to a driving shaft of the electric motor and wrapped around a rope for suspending a car, A torque output sprocket that is integrally mounted; a torque input sprocket that drives the torque output sprocket via a chain; and a handle that rotates the torque input sprocket. In the manual drive device for an elevator hoisting machine that moves the car suspended on the sheave by interlocking the chain, the torque output sprocket and the sheave by rotating the torque input sprocket, A first sprocket shaft that is rotatably supported by the drive shaft and rotatable at the other end, and an intermediate portion thereof A frame for rolling support the second sprocket shaft universal, and the torque output sprocket which is integrally mounted on the drive shaft is provided at one end of said frame, integrally with said first sprocket axis A first torque reduction sprocket having a smaller diameter than the torque output sprocket and a second torque reduction having a larger diameter than the first torque reduction sprocket, which are integrally attached to the first sprocket shaft. A sprocket for torque, and a torque input sprocket that is integrally attached to the second sprocket shaft and has a smaller diameter than the second torque reduction sprocket, the torque output sprocket, and the first torque reduction sprocket. First chain to be wound, second torque reduction sprocket, and torque input A second chain wound around the sprocket, the handle attachable to the second sprocket shaft, and one end rotatably attached to the other end of the frame, and the other end rotated to the machine beam It is configured to include a support body that is freely attached and supports the other end of the frame.

  In the present invention configured as described above, when performing manual operation, one end of the frame is rotatably supported on the machine beam by the support body, and the other end is rotatably supported by the machine beam. The torque reduction sprocket is attached to the first sprocket shaft, the second torque reduction sprocket is attached to the first sprocket shaft, the torque input sprocket is attached to the second sprocket shaft, and the torque output sprocket and the first torque reduction are attached. The second chain is wound around the first chain, the second torque reduction sprocket, and the torque input sprocket, respectively. In this state, by attaching a handle to the second sprocket shaft and rotating the torque input sprocket, the second chain, the second torque deceleration sprocket, the first torque deceleration sprocket, the torque output sprocket, Move the cage suspended on the sheave by linking the sheave. As a result, the reaction force generated from the torque output sprocket side when the handle is operated acts on the first sprocket shaft, that is, the other end side of the frame via the first chain, and then via the second chain. Since it acts on the second sprocket shaft, i.e., the middle part of the frame, most of the reaction force can be treated as an internal force in the frame, and is therefore a support and structure attached to the other end of the frame. The reaction force acting on the machine beam can be reduced. Further, the reduction ratio can be increased by interposing a plurality of sprockets having different diameters between the torque output sprocket and the torque input sprocket, and therefore the operating force of the handle can be reduced.

  According to the present invention, most of the reaction force generated by the steering operation during manual operation is processed as the internal force in the frame, and the reaction force acting on the structure via the support attached to the other end of the frame is reduced. This makes it possible to simply make the support simply prevent the frame from rotating, and it is not necessary to install a complicated and highly rigid member on the structure side. The versatility of the apparatus can be improved. In addition, the reduction ratio can be increased by interposing a plurality of sprockets having different diameters between the torque output sprocket and the torque input sprocket, thereby reducing the operating force of the handle and improving the operability. it can.

  Hereinafter, an embodiment of a manual drive device for an elevator hoist according to the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing an embodiment of a manual drive device for an elevator hoist according to the present invention, FIG. 2 is a side view of the manual drive device shown in FIG. 1, and FIG. 3 shows a state in which a frame is attached to a drive shaft. FIG. 4 is a side view showing a state where the frame is attached to the drive shaft, and FIG. 5 is a side view showing a state where the manual drive device is supported by the machine beam. In addition, the same code | symbol is attached | subjected to the thing equivalent to what was shown in FIG. 6 mentioned above. That is, 30 is a machine beam, 31 is an electric motor, and 31a is a drive shaft.

  As shown in FIG. 1, a manual drive device 1 for an elevator hoist according to this embodiment has a first sprocket shaft 2 that is rotatably supported at one end by a drive shaft 31a and rotatable at the other end. A frame 4 that supports the second sprocket shaft 3 that is rotatable at an intermediate portion, a torque output sprocket 5 that is integrally attached to the drive shaft 31a, and a torque that is integrally attached to the first sprocket shaft 2. A first torque reduction sprocket 6 having a smaller diameter than the output sprocket 5 and a second torque reduction sprocket 7 which is integrally attached to the first sprocket shaft 2 and has a larger diameter than the first torque reduction sprocket 6. And a torque input sprocket 8 that is integrally attached to the second sprocket shaft 3 and has a smaller diameter than the second torque reduction sprocket 7, as shown in FIG. A first chain 9 wound around the sprocket 5 for torque and the first sprocket 6 for torque reduction, a second chain 10 wound around the second sprocket 7 for torque reduction and the torque input sprocket 8, and a second chain A handle 11 that can be mounted on the sprocket shaft 3 and a frame 4 having one end rotatably attached to the other end of the frame 4 and the other end rotatably attached to the machine beam 30 as shown in FIG. 4 and a support body 12 that supports the other end of 4. The first sprocket shaft 2, the first torque reduction sprocket 6 and the large-diameter second torque reduction sprocket 7 are assembled together in advance, and the second sprocket shaft 3 and torque input The sprocket 8 is also integrally assembled in advance.

The frame 4 includes a pair of arms 4a and 4b facing each other. Between these arms 4a and 4b, a torque output sprocket 5, a first torque reduction sprocket 6, and a second torque reduction sprocket. 7 and a torque input sprocket 8 are interposed. Further, as shown in FIGS. 3 and 4, one end of the frame 4 is rotatably supported by a drive shaft 31 a via a ball bearing 13. That is, the arm 4a is supported by the large-diameter portion of the drive shaft 31a being inserted into a hole 4a1 formed at one end thereof, and by a plurality of ball bearings 13a provided along the circumference of the hole 4a1. The large diameter part of 31a is clamped. The arm 4b is supported by the small diameter portion of the drive shaft 31a being inserted into a hole 4b1 formed at one end thereof, and a plurality of ball bearings 13b provided along the circumference of the hole 4b1. The small diameter portion is sandwiched.

  Furthermore, the handle 11 described above has an arm length set to, for example, 350 mm.

Further, as shown in FIG. 5, the support 12 described above is locked to the other end of the arm 4b by a bolt 14a and the other end is locked to the machine beam 30 by a bolt 14b.

  In the present embodiment, when manual operation is performed, one end of the arm 4a is supported on the drive shaft 31a, the torque output sprocket 5 is fitted to the drive shaft 31a, and the first assembled in advance is integrated. The sprocket shaft 2, the first torque reduction sprocket 6 and the large-diameter second torque reduction sprocket 7 are connected to the other end of the arm 4a, the second sprocket shaft 3 and the torque input sprocket 8 which are assembled together in advance. Is disposed in the middle part of the arm 4a. In this state, the arm 4b is opposed to the arm 4a, one end thereof is supported by the drive shaft 31a, and the other end is supported by the machine beam 30 by the support body 12. Next, the first chain 9 is wound around the torque output sprocket 5 and the first torque deceleration sprocket 6, and the second chain 10 is wound around the second torque deceleration sprocket 7 and the torque input sprocket 8, respectively. A handle 11 is attached to the sprocket shaft 3 of 2. In this state, the handle 11 is operated to rotate the torque input sprocket 8, whereby the second chain 10, the second torque deceleration sprocket 7, the first torque deceleration sprocket 6, and the torque output sprocket 5. And, the sheave (not shown) is interlocked to move the car suspended on the sheave.

  According to the present embodiment, the reaction force generated from the torque output sprocket 5 side in response to the steering operation is applied to the first sprocket shaft 2, that is, the other end side of the frame 4 via the first chain 9. , Acting on the second sprocket shaft 3 via the second chain 10, that is, the middle part of the frame 4, most of the reaction force can be treated as an internal force in the frame 4. The reaction force acting on the support 12 attached to the other end and the machine beam 30 as a structure can be reduced.

  Further, the reduction ratio can be increased by passing a plurality of sprockets having different diameters between the torque output sprocket 5 and the torque input sprocket 8, that is, the first torque reduction sprocket 6 and the second torque reduction sprocket 7. Therefore, the operating force of the handle 11 can be reduced. Actually, the load is 2000 kg, the sheave diameter is 600 mm, the diameter of the torque output sprocket 5 is 379.1 mm, the diameter of the first torque reduction sprocket 6 is 71.34 mm, and the diameter of the second torque reduction sprocket 7 is 212. When an elevator with a diameter of .43 mm, a torque input sprocket 8 of 71.34 mm, and an arm length of the handle 11 of 350 mm was studied, an operating force of 27 kg could be achieved. When the arm length of the handle 11 was set to 530 mm under the same conditions, an operating force of 18 kg was obtained.

  The arm length of the handle 11 is set to 300 mm to 550 mm because the required input torque can be obtained with a relatively small operating force by setting it to 300 mm or more, and is set to 550 mm or less. This is because it can be made suitable for the required installation space.

  Furthermore, by allowing one end of the frame 4 to be rotatably supported by the drive shaft 31a via the ball bearing 13, the frictional resistance can be reduced and the operating force of the handle 11 can be further reduced.

It is a top view which shows one Embodiment of the manual drive apparatus of the winding machine for elevators of this invention. It is a side view of the manual drive device of FIG. It is a top view which shows the attachment state to the drive shaft of a flame | frame. It is a side view which shows the attachment state to the drive shaft of a flame | frame. It is a side view which shows the state with which the manual drive apparatus was supported by the machine beam. It is a side view which shows the manual drive apparatus of the conventional elevator hoisting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manual drive device 2 1st sprocket shaft 3 2nd sprocket shaft 4 Frame 4a Arm 4b Arm 5 Torque output sprocket 6 First torque deceleration sprocket 7 Second torque deceleration sprocket 8 Torque input sprocket 9 First 1 chain 10 second chain 11 handle 12 support 30 machine beam 31 electric motor 31a drive shaft

Claims (4)

An elevator hoisting machine having an electric motor mounted on a machine beam and a sheave integrally attached to a driving shaft of the electric motor and wrapped around a rope for suspending a car, A torque output sprocket that is integrally mounted; a torque input sprocket that drives the torque output sprocket via a chain; and a handle that rotates the torque input sprocket. In the manual drive device of the elevator hoisting machine that moves the car suspended on the sheave by interlocking the chain, the torque output sprocket and the sheave by rotating the torque input sprocket,
A frame having one end rotatably supported by the drive shaft, a first sprocket shaft rotatable by the other end, and a second sprocket shaft rotatable by an intermediate portion thereof;
The torque output sprocket that is provided on one end of the frame and is integrally attached to the drive shaft; and the first sprocket shaft that is integrally attached to the first sprocket shaft and having a smaller diameter than the torque output sprocket. A torque reduction sprocket and the first sprocket shaft are integrally attached to the second torque reduction sprocket having a larger diameter than the first torque reduction sprocket and the second sprocket shaft. The torque input sprocket that is attached and has a smaller diameter than the second torque reduction sprocket, the first chain wound around the torque output sprocket and the first torque reduction sprocket, and the second torque A second chain wound around the sprocket for deceleration and the torque input sprocket; And said handle attachable to the second sprocket axis,
Elevator one end to the other end of the frame with mounted rotatably, the other end pivotally mounted to said machine beam, characterized by comprising a support for supporting the other end of the frame Manual drive device for hoisting machines.   The frame includes a pair of arms facing each other, and the torque output sprocket, the first torque deceleration sprocket, the second torque deceleration sprocket, and the torque input sprocket are interposed between the arms. The manual drive device for an elevator hoist according to claim 1.   The manual drive device for an elevator hoist according to claim 1, wherein one end of the frame is rotatably supported by the drive shaft via a ball bearing.   The manual drive device for an elevator hoist according to claim 1, wherein the handle has an arm length of 300 mm to 550 mm.

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