JP2011225321A - Hoisting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hoisting machine of cranes, which is capable of uncovering a brake cover without scattering powder dust in a clean room and performing a maintenance work of a brake section.SOLUTION: The hoisting machine 3 has a composition where the brake cover 31 covers the brake section 12 including a rotor 21 fixed to a motor shaft 11a of a motor section 11 to be rotated integrally and a brake lining pressed against the rotor 21. Furthermore, the brake cover 31 includes a storing section 32 prepared at a site facing outside of a radial direction of the rotor 21 so as to dent to a disengaging direction toward outside of the radial direction from the rotor 21 and a sucking section 41 openable through communicating between the storing section 32 and a cover external. Thereby, the powder dust produced from abrasion of the brake lining can be accumulated in the storing section 32 to be sucked out from the sucking section 41.

Description

  The present invention relates to a hoisting machine, for example, a crane hoisting machine used in a clean room.

  2. Description of the Related Art In recent years, in a manufacturing apparatus in semiconductor manufacturing or food manufacturing, a clean room is installed, and an overhead traveling crane is installed to carry parts in the clean room and perform maintenance and inspection of the apparatus. In a clean room, when an overhead traveling crane is operated, it is necessary to prevent dust generated from the hoisting machine from scattering into the clean room.

  Since the brake device mounted on the hoisting machine of the overhead traveling crane performs braking by friction between the brake lining and the brake disc, dust is always generated due to wear of the brake lining. The brake device is covered with a brake cover, and dust generated by wear of the brake lining does not scatter in the clean room under normal use conditions.

  Patent Document 1 discloses a crane that encloses a hoisting wire rope of a hoisting machine with an expansion and contraction covering cylinder and drops and accommodates the dust in the expansion and contraction covering cylinder even if dust is generated from the wire rope. Technology is shown.

Japanese Utility Model Publication No. 61-160185

  However, the brake lining of the brake device is a consumable part, and maintenance work such as inspection and replacement of the wear amount is required according to the frequency of use of the hoisting machine. During such maintenance work, the brake cover must be removed, and dust accumulated in the brake cover may be scattered.

  Therefore, the brake cover cannot be removed in the clean room, and inspection of the brake lining wear amount and replacement of the brake lining must be carried out of the clean room by transporting the hoisting machine out of the clean room. And costs were incurred.

  The present invention has been made in view of the above points, and provides a hoisting machine capable of removing a brake cover without scattering dust (abrasion powder) and inspecting and replacing the brake device. Objective.

  In the hoisting machine of the present invention that achieves the above object, a brake part having a rotating body fixed to a motor shaft of a motor part and rotated integrally and a brake lining pressed against the rotating body is covered with a brake cover. A crane crane hoisting machine, wherein the brake cover is provided in a portion facing the radially outer side of the rotating body, and is provided so as to be recessed in a direction away from the rotating body radially outward; It has the suction part which can open and close by connecting between the reservoir part and the cover exterior.

  ADVANTAGE OF THE INVENTION According to this invention, the dust which generate | occur | produces by abrasion of a brake lining can be collected in the reservoir part provided in the brake cover, and the dust of a reservoir part can be sucked out from the suction part connected to a reservoir part. Therefore, dust in the brake cover can be removed before removing the brake cover, and dust can be prevented from scattering when the brake cover is removed.

The figure which shows typically the structure of the hoist type crane with which this invention is applied. The figure which showed the brake part of the winding machine in a partial cross section. The figure explaining the structure of a suction part. The figure explaining the flow of the wind by a ventilation fan. The figure explaining the structure of a brake wheel.

Embodiments of the present invention will be described below with reference to the drawings.
1 to 5 show an embodiment of a hoisting machine having a brake cover provided with a dust suction port mounted on a crane used in a clean room or the like.

  The hoist type crane 1 has a traverse rail 2 and a hoisting machine 3 as shown in FIG. The traversing rail 2 is arranged between a pair of runways (not shown) so as to extend left and right along the ceiling of the building.

  The hoisting machine 3 is supported by the traversing rail 2 so as to be reciprocally movable with a traversing device 4 interposed therebetween. The hoisting machine 3 includes a drum unit 10 that winds the wire rope 5 so that it can be pulled out, a motor unit 11 that rotationally drives the drum unit 10, and a brake unit 12 that brakes the rotation of the motor unit 11. .

  The drum unit 10 is provided such that the rotation center of the drum unit 10 extends horizontally. The motor unit 11 is attached to the drum unit 10 via a bracket (nakabura), and is disposed on one axial side of the drum unit 10. The brake unit 12 is disposed at a position opposite to the drum unit 10 of the motor unit 11.

  A hook 7 is attached to the wire rope 5 via a sheave pulley 6, and the drum unit 10 is driven to rotate by the motor unit 11, and the wire rope 5 is wound up to raise the hook 7 and lift the load M. Be able to. A push button switch 9 is suspended from the hoisting machine 3 via the cable 8.

  As shown in FIG. 2, which is an enlarged view of part A in FIG. 1, the brake unit 12 is fixed to the end of the motor shaft 11 a protruding from the motor unit 11 and is rotated integrally with the brake wheel (rotating body). 21, a brake lining 22 fixed to the brake wheel 21, a brake disc 23 that is pressed against the brake lining 22 and frictionally contacted, and an actuator 24 that controls contact between the brake lining 22 and the brake disc 23. .

  The brake wheel 21 has a disk shape having a predetermined plate thickness, and as shown in FIG. 5, a brake lining 22 is fixed to a side surface and a radially outer region. A plurality of holes 21 a are formed in the iron core portion on the radial center side of the brake wheel 21 so as to open at a predetermined interval in the circumferential direction.

  In a state where the hoisting is stopped, the brake unit 12 causes the brake disc 23 to contact the brake lining 22 of the brake wheel 21 by the actuator 24, and the motor shaft 11a is fixed by the frictional force thereof. When the hoisting operation is performed, the brake lining 22 and the brake disc 23 are opened (non-contact) by the actuator 24, and when the hoisting is stopped, the brake operation is performed.

  The brake unit 12 is covered with a brake cover 31. The brake cover 31 is detachably attached to the end of the motor unit 11 to form a sealed space part isolated from the outside of the cover, and the brake part 12 is accommodated in the space part. Yes.

  The brake cover 31 has a pool portion 32 and a suction portion 41. The pool portion 32 is configured to be recessed in a direction facing away from the brake wheel 21 radially outward at a portion facing the radially outer side of the brake wheel 21.

  The reservoir portion 32 is provided so that at least a part of the reservoir portion 32 is located below the brake cover 31, and is continuously formed in a circumferential shape along the outer periphery of the brake wheel 21 in the present embodiment. ing.

  The brake cover 31 is attached to the motor unit 11 to form a first storage chamber 31A in which the actuator 24 of the brake unit 12 is stored and a second storage chamber 31B in which the brake wheel 21 is stored. The second storage chamber 31B is configured by expanding the diameter through a step at the end of the first storage chamber 31A, and a pool portion 32 is formed in the second storage chamber 31B.

  In the brake cover 31, a dust shielding plate 34 is attached so as to partition between the first storage chamber 31 </ b> A and the second storage chamber 31 </ b> B, and the dust is guided to the pool portion 32 of the brake cover 31, The dust generated in the second storage chamber 31B can be prevented from entering the first storage chamber 31A and adhering to the actuator 24 and the like.

  The suction part 41 communicates between the pool part 32 and the outside of the cover so as to be opened and closed. As shown in FIG. 3, one end of the pool part 32 opens and the other end opens outside the cover. A communication path 42 and a lid 43 that closes the communication path 42 are provided. The communication passage 42 includes a first passage portion 42A that extends downward from the bottom of the reservoir portion 32, and a second passage portion 42B that is bent at the lower end of the first passage portion 42A and extends in the horizontal direction. is doing. And it has the 3rd channel | path part 42C which is bent at the front-end | tip of the 2nd channel | path part 42B, and is extended upwards, and has opening part 42D opened upwards at the upper end of the 3rd channel | path part 42C. Yes.

  The lid body 43 is attached to the upper end of the third passage portion 42C and closes the opening portion 42D. The lid 43 is made of a metal or resin plate member. The lid 43 is made of, for example, a colorless and transparent acrylic resin, so that the inside of the communication path 42 can be visually recognized without removing the lid 43, and dust accumulation in the brake cover 31 is checked. You may comprise so that it can.

  A fan 51 is provided in the brake cover 31. The fan 51 is for actively collecting the dust in the brake cover 31 to the accumulation portion 32 by blowing air. The fan 51 is fixed to the end of the motor shaft 11a so as to be integrally rotatable. As shown by a thick arrow in FIG. 4, the fan 51 is rotated in the brake cover 31 by the rotation of the motor shaft 11a. The air flow is formed along the radially outer side. Then, air is blown to the motor part side of the brake wheel 21 through the hole part 21a of the brake wheel 21 so that an air flow can be formed along the radially outer side from the radial center side of the brake wheel 21. It has become.

  The hoisting machine 3 having the above-described configuration performs a braking operation by pressing the brake disk 23 against the brake lining 22 of the brake wheel 21 by the actuator 24 when the hoisting is stopped. At this time, dust, which is wear powder, is generated from the brake lining 22 and the brake disc 23 and accumulated in the brake cover 31.

  Therefore, if the brake cover 31 is removed as it is, dust accumulated in the brake cover 31 may be scattered, and it is difficult to disassemble in a place such as a clean room where dust is disliked.

  According to the hoisting machine 3, the dust collecting part 32, which is the abrasion powder of the brake lining 22 and the brake disc 23, is provided in the circumferential direction of the brake cover 31. Can be blown outward and moved to the pool 32 of the brake cover 31. Since the fan 51 is mounted on the motor shaft 11a, the dust in the brake cover 31 is positively applied to the dust pool 32 by using the air flow generated by the rotation of the fan 51, as shown in FIG. Can be guided.

  The dust introduced into the pool portion 32 moves downward in the pool portion 32 due to gravity and is accumulated in the lower portion of the pool portion 32. Since the suction part 41 is provided in the lower part of the pool part 32, by removing the cover body 43 from the communication path 42 of the suction part 41, the brake cover 31 and the outside of the cover are communicated with each other, thereby providing a cleaner for the clean room. For example, the dust inside the brake cover 31 can be sucked out from the outside of the cover.

  The communication passage 42 has a configuration in which the second passage portion 42B is bent and horizontally extends at the lower end of the first passage portion 42A extending downward from the pool portion 32, and thus the lid body. It is possible to prevent dust in the communication passage 42 from being scattered from the opening 42D when the clean room cleaner 43 is attached after removing 43.

  Further, the third passage portion 42C is bent at the tip of the second passage portion 42B and extends upward, and the opening portion opens upward at the upper end of the third passage portion. Therefore, when the lid 43 is removed, dust in the communication path 42 can be prevented from scattering from the opening 42D.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the case where the communication passage 42 of the suction portion 41 includes the first passage portion 42A to the third passage portion 42C has been described as an example, but the third passage portion 42C is omitted and the opening portion 42D is provided. It is good also as a structure formed so that it might open upwards at the front-end | tip of the 2nd channel | path part 42B.

DESCRIPTION OF SYMBOLS 1 Hoist type crane 3 Hoisting machine 11 Motor part 11a Motor shaft 12 Brake part 21 Brake wheel (rotating body)
21a Hole portion 23 Brake disc 31 Brake cover 32 Reservoir portion 41 Suction portion 42 Communication passage 42A First passage portion 42B Second passage portion 42C Third passage portion 42D Opening portion 43 Lid 51 Fan

Claims (7)

A crane hoisting machine in which a brake part having a rotating body fixed to a motor shaft of a motor part and rotated integrally and a brake disk pressed against the rotating body is covered with a brake cover,
The brake cover
A pool portion provided to be recessed toward the radially outer side from the rotating body at a portion facing the radially outer side of the rotating body;
A suction part capable of opening and closing between the pool part and the outside of the cover;
The hoisting machine characterized by having.   2. The hoisting device according to claim 1, wherein the suction part includes a communication path having one end opened to the pool part and the other end opened to the outside of the cover, and a lid body closing the communication path. Machine. The pool part is provided so that at least a part of the pool part is located at a lower part of the brake cover,
The communication passage has a first passage portion extending downward from the pool portion and a second passage portion that is bent at a lower end of the first passage portion and extends in a horizontal direction. The hoist according to claim 2. The communication passage has a third passage portion that is bent at the tip of the second passage portion and extends upward, and an opening portion that opens upward at the upper end of the third passage portion. ,
The hoist according to claim 3, wherein the lid is configured to be attached to an upper end of the third passage portion to close the opening.   The hoisting machine according to any one of claims 1 to 4, wherein the pool portion is continuously formed in a circumferential shape along an outer periphery of the rotating body.   The fan is attached to the motor shaft so as to be integrally rotatable, and has a fan that forms an air flow from the radial center of the rotating body toward the radially outer side in the brake cover by the rotation of the motor shaft. The hoist according to any one of claims 1 to 5.   The hoisting machine according to claim 6, wherein the rotating body is formed with a hole through which air sent from the fan can pass.

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