CN111377340A

CN111377340A - Elevator traction machine and elevator

Info

Publication number: CN111377340A
Application number: CN201911361762.3A
Authority: CN
Inventors: 吉冈泰树; 五十岚章智
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2018-12-27
Filing date: 2019-12-26
Publication date: 2020-07-07
Also published as: JP2020104969A

Abstract

The invention provides an elevator tractor capable of preventing foreign matters such as garbage and oil from entering from an opening of a window part for observing a braking surface of a brake drum. An elevator hoist (6) is provided with: a housing (12); a main shaft (16) which is integrally mounted to a traction sheave (8) on which a wire rope (5) for moving the car (3) is installed and which is rotatably supported by the housing (12); a brake drum (13) integrally mounted to the main shaft (16) and having a braking surface (13 a); a brake device (14) for braking the brake drum (13) by bringing the brake pad into contact with the braking surface (13 a); a window part (15) which is arranged on the shell (12) and is provided with an opening (15a) for confirming the braking surface (13a) of the brake drum (13); and a transparent cover member (10) that covers the opening (15a) of the window (15).

Description

Elevator traction machine and elevator

Technical Field

The present invention relates to an elevator hoist and an elevator provided with a brake drum.

Background

Conventionally, as a hoisting machine used in an elevator, there is known a hoisting machine in which a brake drum integrated with a traction sheave is rotationally driven during operation of the elevator, and a brake pad of an electromagnetic brake is pressed against a braking surface of the brake drum to perform braking during stoppage.

In addition, there is known an elevator hoisting machine in which a window portion through which the braking surface of a brake drum can be observed is provided in a housing of the hoisting machine in order to clean the braking surface of the brake drum, and the braking surface is cleaned by a degreasing member inserted into the window portion (patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-112502

Disclosure of Invention

Technical problem to be solved by the invention

However, the techniques described in the above documents have the following problems: foreign matter such as dust or oil in the elevator shaft enters through an opening of a window for observing the braking surface of the brake drum, and the hoist malfunctions.

The present invention has been made in view of the above-described problems of the prior art, and prevents foreign matter such as dust or oil from entering through an opening of a window portion when the window portion for observing the braking surface of a brake drum is provided.

Technical scheme for solving technical problem

In order to solve the above problem, for example, the structure described in the claims is adopted. The elevator hoisting machine according to the present application includes a plurality of means for solving the above-described problems, and includes, as an example: a housing; a main shaft which is integrally mounted to a traction sheave on which a wire rope for moving the car is installed and which is rotatably supported by the housing; the brake drum is integrally installed with the main shaft and is provided with a braking surface; a brake device for braking the brake drum by contacting the brake pad with the braking surface; a window portion provided in the housing and having an opening through which a braking surface of the brake drum can be confirmed; and a cover member covering the opening of the window portion and being transparent.

The elevator hoisting machine described above is an embodiment of the present invention, and an elevator reflecting one aspect of the present invention has the same configuration as the elevator hoisting machine reflecting one aspect of the present invention.

Effects of the invention

According to the present invention, foreign matter such as dust or oil can be prevented from entering through the opening of the window portion for observing the braking surface of the brake drum.

Drawings

Fig. 1 is an overall schematic view of an elevator according to an embodiment of the present invention.

Fig. 2 is an overall schematic diagram of an elevator hoisting machine according to an embodiment of the present invention.

Fig. 3 is a side view of an elevator hoisting machine according to an embodiment of the present invention.

Fig. 4 is a front view of a cover member according to an embodiment of the present invention.

Fig. 5 is a side view of a cover member according to an embodiment of the present invention.

Fig. 6 is a plan view of a cover member according to an embodiment of the present invention.

Fig. 7 is a front view of a window portion to which a cover member is attached according to an embodiment of the present invention.

Fig. 8 is a side view of a window portion to which a cover member is attached according to an embodiment of the present invention.

Fig. 9 is a plan view of a window portion to which a cover member according to an embodiment of the present invention is attached.

Detailed Description

Hereinafter, an embodiment of an elevator (hereinafter referred to as "present example") according to the present invention will be described with reference to the drawings. In the present specification and the drawings, the same reference numerals are used for members having substantially the same elements or the same functions, and redundant description of the invention is omitted.

Fig. 1 is an overall schematic view of an elevator 1 of this example. As shown in fig. 1, an elevator 1 of the present example includes an elevator shaft 2, a car 3, a counterweight 4, a wire rope 5, and an elevator hoisting machine 6 formed in a building. By moving the wire rope 5 by the hoisting machine 6, the car 3 and the counterweight 4 are raised and lowered in the elevator shaft 2. In addition, the elevator 1 of the present example is of a machine room-less type that does not require a machine room to be provided in the upper part of the elevator shaft 2, and is less heavy in the upper part of the building, and the elevator shaft can be designed more freely.

Fig. 2 is a front view of the elevator hoist of the present example, and fig. 3 is a side view of the elevator hoist of the present example. As shown in fig. 2, the elevator hoisting machine 6 includes: a housing 12, a brake drum 13, an electromagnetic brake device 14, a window 15 having an opening 15a, and a cover member 10 covering the opening 15 a.

The case 12 is made of cast iron or the like, has a bottomed cylindrical shape, and houses a motor rotor, a stator, and the like in addition to the brake drum 13. A hollow boss portion is formed in a central portion of the housing 12, and a main shaft 16 is rotatably inserted into the boss portion. The housing 12 is fixed to a hoisting machine fixing member, not shown, provided in the elevator shaft 2 via vibration-proof rubber for the purpose of suppressing vibration.

The brake drum 13 is disposed inside the housing 12 in a state of being coupled to the spindle 16, and has a braking surface 13a on the outer periphery thereof. As shown in fig. 3, the brake drum 13 rotates integrally with the main shaft 16 together with the traction sheave 8 disposed outside the brake drum 13.

The electromagnetic brake device 14 includes therein an iron core, an armature, a brake spring, a brake pad, and the like, which are not shown. When the car 3 is moved up and down, a current is passed through an electromagnetic coil built in the iron core, thereby exciting the iron core and attracting the armature. As a result, the brake pad of the armature is moved in a direction away from the brake drum 3 against the spring force of the brake spring, and the braking force of the brake device 14 is released. On the other hand, when the car 3 is stopped and maintained in this state, the energization of the electromagnetic coil is cut off and the magnet is demagnetized, and the brake pad is pressed against the braking surface 13a of the brake drum 13 by the spring force of the brake spring. As a result, the brake drum 13 is braked by the brake device 14.

The window 15 is integrally provided in the vicinity of the shoulder of the housing 12, and is disposed at a position where it does not interfere with the brake device 14 provided at the upper portion of the housing 12. The window 15 is formed with an opening 15a as a through hole for observing the braking surface 13a of the brake drum 13. The window portion 15 also serves as a mounting portion for mounting the cover member 10, and the transparent cover member 10 is mounted on the window portion 15 so as to cover the opening 15 a.

Fig. 4 is a front view of the cover member of the present example. As shown in fig. 4, the cover member 10 of the present example is constituted by a rectangular bottom surface 101 for covering the opening 15a of the window portion 15, and a plurality of side surfaces 102 provided upright on the peripheral end portion of the bottom surface 101. Further, near the center of the upper end side of the bottom surface 101, a screw insertion hole 21 for inserting the screw member 11 is provided. The bottom surface 101 of the cover member 10 of the present example is formed of a transparent resin plate having a length, width, and thickness of 150mm and 1 mm.

The lid member 10 is formed into a substantially box shape having side surfaces as side walls, each of which is formed by an upper bent portion 102a, a left bent portion 102b, and a right bent portion 102c, by bending an upper edge portion and left and right edge portions of the bottom surface 101. In addition, no bent portion is formed at the lower edge portion of the bottom surface 101.

The cover member 10 is attached and fixed to the window portion 15 (housing 12) by 1 screw member 11 inserted into the screw insertion hole 21. Thus, the cover member 10 is formed in a substantially box shape, and the opening 15a of the window 15 can be covered with the

bent portions

102a, 102b, and 102c from above and from the sides. This prevents foreign matter such as dust or oil from entering through the opening 15 a. In addition, in this example, the cover member is difficult to be cracked because it is formed of a resin material, but the cover member may be formed of a material such as transparent glass.

Fig. 5 is a side view of the cover member of the present example, and fig. 6 is a top view of the cover member of the present example. As shown in fig. 5, in the upper bent portion 102a of the cover member 10 of the present example, an inclined portion 20 is formed so as to be inclined downward as it is separated from the bottom surface 101, that is, so as to be inclined toward the bottom surface 101.

Further, the left bent portion 102b of the cover member 10 is formed with an oil retaining groove 17 extending in the longitudinal direction of the side surface 102. The same groove 17 is also formed in the right bent portion 102 c. As shown in fig. 6, the groove 17 is formed inside the side surfaces of the left bent portion 102b and the right bent portion 102 c.

Fig. 7 is a front view showing a state in which the cover member 10 is attached to the window portion 15. As shown in fig. 7, the cover member 10 is attached and fixed to the window portion 15 by 1 screw member 11. Since the cover member 10 of the present example is transparent, even in a state where the cover member 10 is attached to the window 15, the state of the braking surface 13a of the brake drum 13 can be observed from the opening 15a of the window 15. This makes it possible to confirm the state of the braking surface 13a of the brake drum 13 without detaching the cover member 10, and thus reduces the labor of the operator.

In this example, since the cover member 10 is attached to the window 15 only by 1 screw member 11 and the fixing position is suppressed to 1 position, it is possible to reduce the breakage of the cover member 10 due to the difference in thermal expansion coefficient between the cover member 10 and the case 12. That is, if the number of fixing portions is 2 or more, the cover member 10 may be damaged from the fixing portions when the cover member is deformed (forcibly deformed) more than the housing 12 by heat generated by the motor or the like. According to the present example, since the fixing locations are set to 1 location, breakage of the lid member 10 due to forced deformation can be reduced.

As described above, if the fixing portions are 1 portion to prevent damage due to forced deformation, the fixing strength in the vicinity of the peripheral end of the cover member 10 becomes weak, and a gap or the like may easily occur between the vicinity of the peripheral end of the cover member 10 and the case 12. In this example, the cover member 10 is formed in a box shape, and the distance from the peripheral end portion of the cover member 10 to the opening 15a is increased, so that it is possible to prevent foreign matter such as dust entering from a gap or the like from entering the opening 15 a.

In addition, in the cover member 10 of the present example, since the degree of freedom of contact and separation with respect to the case surface is increased without providing a bent portion at the lower edge portion of the bottom surface 101, the deformation of the cover member due to the forced deformation can be released from the lower edge portion.

Fig. 8 is a side view showing a state in which the cover member 10 is attached to the window portion 15. As shown in fig. 8, the cover member 10 is fixed to the housing 12 at one point by 1 screw member 11 in a state of being fitted into the window portion 15 formed to protrude toward the shoulder position of the housing 12. Further, a housing inclined portion 30 that is inclined downward as it is separated from the opening 15a is formed on the upper surface portion of the housing 12.

Thus, by providing the case inclined portion 30 on the upper surface of the case 12, liquid foreign matter such as oil dropping from above the case 12 can be released in the direction opposite to the side where the opening 15a is located. This prevents foreign matter such as oil from entering the opening 15a through the gap between the end of the upper bent portion 102a and the housing 12. Further, as described above, since the inclined portion 20 is also provided in the upper bent portion 102a of the lid member 10 of the present example, liquid foreign matter such as oil dropping from above the lid member 10 can be caused to flow toward the housing inclined portion 30. In addition, the liquid foreign matter flowing along the housing inclined portion 30 drops to the traction sheave 8 and is reused as lubricating oil.

Fig. 9 is a plan view showing a state where the cover member 10 is attached to the window portion 15. As shown in fig. 9, an opposing groove portion 18 for oil blocking is provided in a side surface portion of the housing 12 at a position opposing the groove portion 17 of the cover member 10 attached to the window portion 15. The opposing groove 18 is formed along the vertical direction of the side surface of the housing 12.

Thus, by providing the opposing groove 18 on the side surface of the housing 12, liquid foreign matter such as oil adhering to the side surface of the housing 12 and penetrating from the gap between the side peripheral end portion of the cover plate member 10 and the housing 12 can be collected by the opposing groove 18, and the liquid foreign matter can flow downward. This prevents foreign matter such as oil from entering the opening 15a from the end portions of the left and right

bent portions

102b, 102 c. Further, as described above, since the groove portions 17 are also provided on the inner surfaces of the left and right

bent portions

102b and 102c of the lid member 10 of the present example, it is possible to collect liquid foreign matters such as oil entering from the side peripheral end portions of the lid member 10 by the groove portions 17 and to flow the liquid foreign matters downward.

Thus, in this example, even if the number of fixing portions is 1 to prevent damage due to forced deformation, when a gap is likely to be formed between the cover member 10 and the housing 12, foreign matter such as oil that has entered the gap can be collected by the groove portions 17 and the opposing groove portions 18.

As described above, according to the elevator hoisting machine 6 and the elevator 1 of the present example, even when the window portion 15 is provided to observe the braking surface 13a of the brake drum 13, it is possible to prevent foreign matter such as dust or oil from entering through the opening 15a of the window portion 15. In addition, in an elevator without a machine room, since there are few walls such as walls of the machine room, many foreign matters such as dust are scattered from the space of the elevator shaft 2 by wind generated by movement of the car 3, and thus the present invention is effective.

The elevator hoisting machine and elevator of the present invention are not limited to the above-described embodiments, and various modifications and changes may be made in other materials, structures, and the like without departing from the scope of the structure of the present invention. For example, although the cover member 10 is attached to the window portion 15 by 1 screw member 11 in the present example, the cover member 10 may be attached to the window portion 15 by using a plurality of screw members 11 in order to improve the fixing strength.

In this example, the cover member 10 is attached to the window 15 using the screw member 11, but for example, an engagement portion including a protrusion and a groove may be formed in the cover member 10 and the window 15, and the cover member 10 may be attached to the window 15 so as to be hooked.

Description of the reference symbols

1 an elevator, a plurality of elevators and a plurality of elevators,

2 the elevator shaft is driven by a driving motor,

3 the number of the cars is 3,

4, the weight of the elevator is balanced,

5, a steel wire rope is arranged in the steel wire rope,

6 a traction machine for an elevator,

8, a traction wheel is arranged on the traction wheel,

10 a cover plate member for a vehicle,

11 a screw member for a screw-type compressor,

12 of the housing, and a cover plate,

13 of the brake drum, and a brake drum,

13a of the braking surface of the brake shoe,

14 a braking device is arranged on the base plate,

15 the window part of the window part is provided with a window part,

15a of the plurality of the holes are opened,

16 a main shaft of the machine tool is provided,

17 the parts of the groove are arranged in the groove,

18 opposite to the groove part, and a groove part,

20 the inclined part of the inclined part is provided with a plurality of inclined parts,

21 a screw is inserted into the through hole,

30 the inclined portion of the housing 30,

101 on the bottom side thereof,

102 side surface.

Claims

1. A traction machine for an elevator, comprising:

a housing; a main shaft integrally attached to a traction sheave on which a wire rope for moving the car is installed and rotatably supported by the housing; the brake drum is integrally installed with the main shaft and is provided with a braking surface; a brake device for braking the brake drum by bringing a brake pad into contact with the braking surface; and a window portion provided in the housing and having an opening through which the braking surface of the brake drum can be confirmed, wherein the elevator hoisting machine is characterized by comprising a cover member that covers the opening of the window portion and is transparent.

2. The traction machine for an elevator according to claim 1,

the cover member is formed of resin.

3. The traction machine for an elevator according to claim 2,

the cover member is fixed to the window portion with 1 screw member.

4. The traction machine for an elevator according to any one of claims 1 to 3,

the cover member has a rectangular bottom surface portion covering the opening of the window portion, and a side wall portion provided upright on a peripheral end portion of the bottom surface portion.

5. The traction machine for an elevator according to claim 4,

an insertion hole for inserting the screw member is formed in the bottom surface portion, and the side wall portion is provided upright at a peripheral end portion other than an opposite side to a side where the insertion hole is provided.

6. The traction machine for an elevator according to claim 4,

the side wall portion on the side where the screw member is attached is inclined with respect to the bottom surface portion side in a direction away from the bottom surface portion.

7. The traction machine for an elevator according to claim 4,

a groove portion is formed along the longitudinal direction in a side wall portion except for a side on which the screw member is mounted.

8. The traction machine for an elevator according to claim 7,

in the window portion, an opposing groove portion is formed at a position opposing the groove portion provided in the side wall portion of the fixed cover member.

9. An elevator, comprising: a cage and a traction machine for lifting the cage in a shaft,

the traction machine includes: a housing; a main shaft that is integrally attached to a traction sheave on which a wire rope for moving the car is installed and that is rotatably supported by the housing; a brake drum integrally mounted with the spindle and having a braking surface; a brake device for braking the brake drum by bringing a brake pad into contact with the braking surface; a window portion provided in the housing and having an opening through which a braking surface of the brake drum can be confirmed; and a cover member that covers the opening portion and is transparent.