JP2015157668A - hoist assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hoist assembly having a compact and simple-structured vibration damping mechanism for suppressing horizontal vibration of a hoist.SOLUTION: Horizontal vibration of a hoist is absorbed by a machine base and a vibration damping shaft by forming a through-hole for vibration damping in a machine base on which the hoist is installed and inserting a vibration damping shaft fixed to a machine base placement member, on which the machine base is placed, through the through-hole for vibration damping. This causes horizontal vibration of the hoist to be absorbed by the machine base placement member via the machine base and vibration damping shaft, thereby suppressing the horizontal vibration of the hoist itself. In addition, the vibration damping mechanism itself can be made compact and simple since the vibration damping mechanism is simply provided between the machine base on which the hoist is installed and the machine base placement member.

Description

  The present invention relates to a hoisting machine assembly of an elevator apparatus, and more particularly to a hoisting machine assembly provided in a machine room of an elevator apparatus.

  In general, many elevator installations are called traction systems. In this traction method, a hoistway formed in a building is provided with a counterweight having a mass approximately equal to that of the car and the hoisting machine in a state where the car and the counterweight are suspended by the main rope. By lifting the main rope, the car and the counterweight are lifted up and down in the opposite direction.

  In recent years, an elevator apparatus using a large hoisting machine has been installed with a rise in the number of buildings, and this large hoisting machine is arranged in a machine room provided at the top of a hoistway in the elevator apparatus. . Such a hoisting machine is configured to be fixed to a machine beam constituting the machine room via vibration damping rubber. In addition, since the hoisting machine is installed in the machine room, an installation member such as a machine beam is used. Therefore, in the present invention, the hoisting machine and the installation member for the machine room are handled as a hoisting machine assembly. To.

  For example, in Japanese Patent Laid-Open No. 03-26684 (Patent Document 1), a hoisting machine is fixed to a machine beam by the following fixing method. According to Patent Document 1, a hoisting machine composed of an electric motor, a speed reducer, a sheave, and the like is fixed on a machine base and supported on a machine beam, and the machine beam is formed on the machine room floor formed at the upper part of the hoistway Install and place a cradle on the beam on the floor of the machine room, place the machine beam across the cradle, and place the machine beam and machine directly above or near the vibration proof rubber cradle. Proposed configuration to be placed between the tables. With this configuration, the position of the vibration isolating support between the machine base and the machine beam is set to the position of the highly rigid cradle, so that the excitation input to the machine beam is reduced and the primary vibration mode of the machine beam is reduced. It states that the occurrence can be suppressed.

Japanese Patent Laid-Open No. 03-26684

  As described above, in recent years, the traveling speed of a car of an elevator apparatus has increased due to the increase in the number of buildings, and the ascending / descending stroke tends to increase. For this reason, a high performance required for the hoisting machine has been demanded. When the output of the hoisting machine increases, the excitation force by the hoisting machine increases in proportion to it, and not only the vibration transmitted to the machine room floor via the machine beam, but also the mode in which the hoisting machine itself vibrates greatly in the horizontal direction. Therefore, the sheave fixed to the hoisting machine vibrates in the horizontal direction accordingly.

  The sheave is provided with a rope receiving groove for receiving and guiding a plurality of main ropes, and the main rope is suspended in the rope receiving grooves. For this reason, when the sheave vibrates in the horizontal direction, the main rope also vibrates accordingly, and as a result, a phenomenon occurs in which the vibration is transmitted to the car and the car is shaken. Therefore, in order to suppress the swing of the car, it is necessary to suppress the horizontal vibration of the hoisting machine. Recently, there is a demand for space saving in the machine room, and a vibration-proof mechanism that suppresses horizontal vibration of the hoisting machine is also required to have a small and simple configuration.

  An object of the present invention is to provide a hoisting machine assembly including a vibration control mechanism having a small and simple configuration that suppresses horizontal vibrations of the hoisting machine.

  A feature of the present invention is that a vibration control through hole is formed in a machine base on which a hoisting machine is installed, and a vibration control shaft fixed to a machine base mounting member on which the machine base is mounted is used as the vibration control through hole. The horizontal vibration of the hoisting machine is received by the machine base mounting member via the machine base and the damping shaft.

  According to the present invention, the horizontal vibration of the hoisting machine itself can be suppressed by receiving the horizontal vibration of the hoisting machine by the machine base mounting member via the machine base and the damping shaft. become. Further, since the vibration damping mechanism is simply provided between the machine base on which the hoisting machine is installed and the machine base mounting member, the vibration damping mechanism itself can be configured in a small size and easily.

1 is a configuration diagram showing a schematic configuration of an elevator apparatus to which the present invention is applied. It is a block diagram which shows the schematic structure of the winding machine shown in FIG. It is a front view which shows the attachment state of the winding machine, the machine base, and the machine beam which become typical embodiment of this invention. It is sectional drawing which shows the AA cross section of FIG. It is a block diagram which shows the structure of the damping mechanism provided between the machine base shown in FIG. 3, and a machine beam.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

  First, a general configuration of an elevator apparatus to which the present invention is applied will be described. As is well known, an elevator apparatus is housed in a hoistway provided in a building.

  In FIG. 1, in an elevator apparatus, a hoisting machine is generally placed in a machine room 160 formed at the top part of a hoistway 110, and fixed to a machine room floor by a fixing means. Although not shown in detail in FIG. 1, the hoisting machine 100 has a sheave for suspending a plurality of main ropes 130. One end of the main rope 130 extending from the sheave is connected to the upper end of the counterweight 140 via a curled pulley 150, and the other end is connected to the upper end of the car 120.

  Next, the movement of each part during operation of the elevator apparatus will be described. When the hoisting machine 100 is operated and the sheave rotates, the main rope 130 suspended on the sheave moves along the sheave rotation direction by friction between the main rope 130 and the sheave. The counterweight 140 and the car 120 are moved up and down by the movement of the main rope 130. Although not shown in FIG. 1, in order to make the car 120 move up and down smoothly, in an actual elevator apparatus, the side surfaces of the car 120 and the counterweight 140 are guided by guide parts called guide rails. It has become.

  In such an elevator apparatus, an operation command is given to an electric motor, a braking mechanism, or the like constituting the hoist by a controller (not shown), and the car 120 moves up and down toward a predetermined level of the building by the operation command. To do. Although the elevator apparatus has been described in a simplified manner as described above, actually, various components are further added.

  Next, a schematic configuration of the hoisting machine 100 will be described with reference to FIG. In FIG. 2, the hoisting machine 100 includes an electric motor 10, a sheave 12, a brake disk 13, and a pair of bearing stands 15. The sheave 12 has a drive shaft 11. Further, the hoisting machine 100 is provided with a brake 14 and a machine base 22. As will be described later, the machine base 22 is mounted and fixed on a machine beam (not shown) that functions as a machine base mounting member. The machine base mounting member of the present embodiment described below is preferably a machine beam. However, the machine base is not limited to this machine beam, and may be a floor surface constituting a machine room. What is necessary is just to have the function to put and fix.

  The electric motor 10 and the drive shaft 11 will be described. The electric motor 10 is installed on the machine base 22. One end of a drive shaft 11 fixed to the sheave 12 is rotatably attached to the electric motor 10. The drive shaft 11 is rotatably supported by a pair of bearing bases 15. When the electric motor 10 is driven, the drive shaft 11 rotates, and the sheave 12 rotates in conjunction with the rotation of the drive shaft 11.

  The bearing base 15 includes an electric motor side bearing base 16 and a brake disk side bearing base 17 and is supported by a machine base 22. The motor-side bearing stand 16 supports the end portion on the electric motor 10 side in the axial direction of the drive shaft 11. Further, the brake disk side bearing stand 17 supports the brake 14 and the end portion on the opposite side of the electric motor 10 in the axial direction of the drive shaft 11. In this embodiment, the drive shaft 11 is supported by the two bearing bases of the motor side bearing base 16 and the brake disk side bearing base 17, but the drive shaft 11 is supported by a single bearing base. It ’s good.

  The sheave 12 is formed in a cylindrical shape, and a through hole (not shown) is formed at the center of the shaft. The diameter of the through hole is substantially equal to the size of the outer diameter of the drive shaft 11. The drive shaft 11 passes through the through hole of the sheave 12 and is fixed to the sheave 12.

  A winding portion 18 around which the main rope 130 is wound is formed on the side surface portion of the sheave 12. The winding portion 18 has a plurality of rope storage grooves 18a around which the rope 130 is wound. As the sheave 12 rotates, the rope storage groove 18 a of the winding portion 18 winds up the main rope 130. Further, a projecting portion 19 and a flange portion 20 are provided at both end portions in the axial direction of the sheave 12.

  The protrusion 19 is disposed at one end of the sheave 12 in the axial direction. The protruding portion 19 protrudes outward in the radial direction of the sheave 12 and is formed with a diameter larger than the outer diameter of the winding portion 18 of the sheave 12. Thereby, it can prevent that the main rope 130 wound around the winding part 18 comes off from the protrusion part 19 side.

  The flange portion 20 is disposed at the other end portion of the sheave 12 in the axial direction. The flange portion 20 protrudes outward in the radial direction of the sheave 12. The outer diameter of the flange portion 20 is formed larger than the outer diameter of the protruding portion 19. A fitting portion 21 is provided between the flange portion 20 and the winding portion 18 of the sheave 12.

  The brake disc 13 is fixed to the fitting portion 21. The outer diameter of the fitting part 21 is formed larger than the diameter of the protruding part 19. Further, the axial length of the fitting portion 21 is formed to be the same as or slightly larger than the axial length of the brake disc 13.

  The brake disc 13 is fixed to the fitting portion 21 in contact with the facing surface 20a of the flange portion 20 facing the electric motor 10. As a result, the brake disc 13 is also rotated in conjunction with the sheave 12 rotated by the drive of the electric motor 10. When a control drive current flows through the brake 14, the internal electromagnetic coil is excited and the brake disk 13 is freed. When the control drive current is interrupted, the electromagnetic coil is demagnetized and controlled by the brake spring (not shown). Power is acting.

  In such a hoisting machine 100, in this embodiment, the hoisting machine 100 is fixed to the machine beam by a fixing method as shown in FIG.

  In FIG. 3, a fixed iron plate 31 is fixed to a floor surface 30 made of concrete constituting the machine room 160, and the hoisting machine 100 is disposed on the fixed iron plate 31 via a vibration isolating rubber 32 and a support iron plate 33. A machine beam 34 as a base for supporting the machine is attached. The anti-vibration rubber 32 and the support iron plate 33 are integrated by pressure bonding, thereby ensuring a vibration-proof function between the machine beam 34 and the fixed iron plate 31.

  As described above, the machine beam 34 has a function as a machine base mounting member. The machine beam 34 is generally made of H-shaped steel, and has a structure in which upper and lower flat portions 34A are provided and supported by a support surface portion 34B extending in the vertical direction. This H-section steel has a well-known structure.

  The hoisting machine 100 is fixed and integrated with the machine base 35 by bolts or the like. The machine base 35 is also made of H-shaped steel, and has a flat surface portion 35A on the top and bottom, and has a structure in which the flat surface portion 35A is supported by a support surface portion 35B extending in the vertical direction.

  The machine base 35 in which the hoisting machine 100 is integrated is placed and fixed on the machine beam 34 via a support iron plate 36, a vibration isolating rubber 37, and a fixed iron plate 38. As can be seen from FIGS. 3 and 4, the upper plane portion 34A of the machine beam 34 and the lower plane portion 35A of the machine base 35 are brought into contact with each other. A vibration rubber 37 and a fixed iron plate 38 are interposed.

  The supporting iron plate 36 and the vibration isolating rubber 37 are integrated by pressure bonding, thereby ensuring a vibration isolating function between the machine beam 34 and the machine base 35. As shown in FIG. 4, the fixed iron plate 38 is disposed so as to straddle the support surface portions 34 </ b> B and 35 </ b> B on the upper plane portion 34 </ b> A of the machine beam 34 and the lower plane portion 35 </ b> A of the machine base 35.

  The lower flat portion 35A of the supporting iron plate 36 and the machine base 35 is fixed by a bolt 39, and similarly, the fixed iron plate 38 and the upper flat portion 34A of the machine beam 34 are fixed by a bolt 40. The machine beam 34 and the machine base 35 are anti-vibrated by an anti-vibration mechanism including a support iron plate 36, an anti-vibration rubber 37, a fixed iron plate 38, and bolts 39 and 40.

  Returning to FIG. 3, the vibration control mechanism 41, which is a feature of the present embodiment, is disposed in the space between the above-described vibration control mechanisms. Although details of the vibration damping mechanism 41 will be described with reference to FIG. 5, the vibration of the machine base 35 in the horizontal direction is received by a vibration damping shaft 42 extending through the lower plane portion 35 </ b> A of the machine base 35. The damping shaft 42 is fixed to the upper plane portion 34A of the machine beam 34, whereby the horizontal vibration of the machine base 35 is received by the machine beam 34 via the damping shaft 42, whereby the hoisting machine itself The vibration in the horizontal direction can be suppressed.

  As shown in FIG. 4, the vibration damping mechanism 41 is disposed so as to be positioned on one surface with the support surface portion 35 </ b> B of the machine base 35 as a boundary. Desirably, it is good to arrange | position so that it may be located in the surface of the side opened outside with respect to the winding machine 100. If it does in this way, the effect that attachment of damping mechanism 41 will become easy can be acquired.

  Next, a specific configuration of the vibration damping mechanism 41 will be described with reference to FIG. In FIG. 5, a damping shaft 42 is inserted into the upper plane portion 34 </ b> A of the machine beam 34, and is firmly fixed by two nuts 43. That is, the nut 43 fixes the damping shaft 42 to the flat portion 34A across the flat portion 34A.

  On the other hand, a vibration control through hole 44 is formed in the lower flat surface portion 35A of the machine base 35 facing the upper flat surface portion 34A of the machine beam 34, and the vibration control shaft 42 serves as the vibration control through hole. 44 extends through the lower plane portion 35 </ b> A on the lower side of the machine base 35. An outer shape D1 of the damping shaft 42 is smaller than an inner diameter D2 of the damping through hole 44, and a gap is formed between them. This gap has a function of absorbing a tolerance change and a positional deviation of the vibration control bracket described later. Further, even if the machine base 35 vibrates in the horizontal direction, the damping shaft 42 does not come into contact with or interfere with the damping through hole 44 of the machine base 35.

  Further, a damping bracket 45 is fixed to the upper surface of the lower flat portion 35A of the machine base 35 so as to cover the damping through hole 44. The vibration control bracket 45 includes a vibration control rubber bush 46 having a vibration control shaft insertion hole 46A through which the vibration control shaft 42 penetrates in the center.

  The shaft centers of the damping shaft insertion hole 46A, the damping through hole 44, and the damping shaft 42 are preferably concentric, but a slight misalignment is allowed. The inner diameter of the damping shaft insertion hole 46 </ b> A formed in the damping rubber bush 46 is set to be the same as or slightly smaller than the outer diameter of the damping shaft 42. Thereby, the vibration of the machine base 35 is efficiently absorbed.

  Here, it goes without saying that the inner diameter of the damping shaft insertion hole 46 </ b> A is smaller than the inner diameter of the damping through hole 44. Further, the damping rubber bushing 46 is opened in the vertical direction with respect to the damping bracket 45 so that the damping rubber bushing 46 is allowed to deform when the machine base 35 vibrates. The damping rubber bushing 46 may be fixed to the outer periphery of the damping shaft 42 instead of the damping bracket 45. In this case, the damping rubber bushing 46 is press-fitted and fixed to the damping bracket 45.

  Further, in the present embodiment, the vibration damping bracket 45 is fixed to the upper surface of the lower flat portion 35A of the machine base 35, but may be fixed to the lower surface of the lower flat portion 35A of the machine base 35. It ’s good. In this case, since the vibration damping bracket 45 is located between the lower plane portion 35A of the machine base 35 and the upper plane portion 34A of the machine beam 34, it is necessary to secure a space therebetween.

  As shown in FIG. 4, fixing bolts 47 that are screwed in from the upper side of the damping bracket 45 and extend toward the flat portion 35 </ b> A of the machine base 35 are integrated on the left and right sides of the damping rubber bush 46. The two fixing bolts 47 are inserted through a fixing bolt through hole 48 formed so as to pass through the lower flat portion 35A of the machine base 35, and a damping bracket is provided by a washer 49 and a nut 50 at the tip side thereof. 45 is fixed to the lower plane portion 35A of the machine base 35. The outer diameter D3 of the fixing bolt 47 is smaller than the inner diameter D4 of the fixing bolt through hole 48, and a gap is formed between them. This gap has a function of absorbing a tolerance change and a positional deviation of the vibration control bracket described later.

Here, the gap (D2-D1) between the damping through hole 44 and the damping shaft 42 is formed larger than the gap (D3-D4) between the fixing bolt through hole 48 and the fixing bolt 47. .
This is because even if the tolerance change or displacement of the damping bracket 45 is maximized and the damping bracket 45 is fixed to the lower flat portion 35A of the machine base 35 by the fixing bolt 47, the damping shaft This is because 42 can be inserted into the vibration control through hole 44.

  In the above, the vibration damping mechanism 41 is attached to the machine base 35 before the machine base 35 is fixed to the machine beam 34. First, the damping shaft 42 is press-fitted and fixed to the damping rubber bush 46 of the damping bracket 45. In this case, since the damping rubber bushing 46 has elasticity, the damping shaft 42 can move in the axial direction. Similarly, the fixing bolt 47 is screwed into the vibration suppression bracket 45 so that the vibration suppression bracket 45 and the fixing bolt 47 are integrated. In the vibration damping mechanism 41 assembled in this manner, the vibration damping shaft 42 is inserted into the vibration damping through hole 44 of the lower plane portion 35A of the machine base 35A, and the fixing bolt is similarly inserted into the fixing bolt through hole 48. 47 is inserted, and in this state, the nut 50 is screwed into the distal end side of the fixing bolt 47 with a washer 49 interposed. As a result, the lower plane portion 35A of the machine base 35A and the vibration damping mechanism 41 are firmly integrated.

  Next, the machine base 3 is placed on the machine beam 34 in a state where one nut 43 is screwed onto the tip end side of the damping shaft 42 press-fitted into the damping rubber bush 46. In this case, a damping shaft fixing through-hole through which the tip of the damping shaft 42 can be inserted is formed at a predetermined position on the upper plane portion 34A of the machine beam 34, and the damping shaft fixing through-hole is inserted through the through-hole. The other nut 43 is screwed into the tip of the vibration damping shaft 42.

  The through hole for fixing the damping shaft has an inner diameter larger than that of the damping shaft 42 and has a function of absorbing tolerance change and positional deviation when the machine base 35 is placed on the machine beam 34. Then, the damping shaft 42 and the planar portion 34A can be firmly fixed by screwing the two nuts 43 so as to sandwich the upper planar portion 34A of the machine beam 34.

  According to the hoisting machine assembly in which the vibration damping mechanism 41 is incorporated in this manner, even if the hoisting machine 100 is driven and the machine base 35 fixed thereto vibrates in the horizontal direction, the damping shaft 42 does not move. The vibration of the machine base 35 can be received through the damping rubber bush 46. Therefore, the vibration of the hoisting machine 100 that has swayed the car 120 via the sheave 18 and the main rope 130 can be suppressed, and as a result, an elevator apparatus having a comfortable riding comfort can be provided.

  Furthermore, since the vibration damping mechanism 41 is only provided between the flat surface portion 34A of the machine beam 34 and the flat surface portion 35A of the machine base 35, a small and simple structure can be achieved. Conventionally, it has been necessary to secure an arrangement space for the vibration isolation mechanism in the horizontal direction around the hoisting machine, and there has been a problem that the machine room is increased in size, but in this embodiment, it is small and simple as described above. Since the vibration damping mechanism has a simple configuration, it is possible to eliminate the problem of increasing the size of the machine room.

  In this embodiment, the damping shaft 42 is fixed to the machine beam 34. However, without using the machine beam 34, the damping shaft is directly attached to the fixed iron plate 31 fixed to the floor 30 of the machine room. 42 may be fixed. As described above, the main point is to fix the damping shaft 42 to a machine base mounting member having a function of mounting and fixing the machine base 35.

  Further, in this embodiment, the damping shaft 42 is press-fitted and fixed to the damping rubber bush 46 before the machine base 35 is placed on and fixed to the machine beam 34. However, instead of this method, when the damping shaft 42 is fixed in advance to the upper plane portion 34A of the machine beam 34 and the machine base 35 is placed on and fixed to the machine beam 34, the damping shaft 42 is It is also possible to press fit the damping rubber bush 46 of the damping block 45.

  As described above, the present invention forms a vibration-damping through hole in the machine base on which the hoisting machine is installed, and the vibration-damping shaft fixed to the machine base mounting member on which the machine base is mounted passes through for vibration suppression. A configuration is adopted in which the horizontal vibration of the hoisting machine is received by the machine base mounting member through the machine base and the damping shaft through the hole.

  According to this configuration, the horizontal vibration of the hoisting machine itself can be suppressed by receiving the horizontal vibration of the hoisting machine by the machine base mounting member via the machine base and the damping shaft. become. Further, since the vibration damping mechanism is simply provided between the machine base on which the hoisting machine is installed and the machine base mounting member, the vibration damping mechanism itself can be configured in a small size and easily.

  DESCRIPTION OF SYMBOLS 30 ... Floor surface, 31 ... Fixed iron plate, 34 ... Machine base (H-shaped steel), 34A ... Planar part, 35 ... Machine beam (H-shaped steel), 35A ... Flat part, 41 ... Damping mechanism, 42 ... Damping Shaft, 43 ... nut, 44 ... damping vibration through hole, 45 ... damping bracket, 46 ... damping rubber bush, 47 ... fixing bolt machine base, 48 ... fixing bolt through hole, 49 ... washer, 50 ... nut, DESCRIPTION OF SYMBOLS 100 ... Hoisting machine, 110 ... Hoistway, 120 ... Riding car, 130 ... Main rope, 140 ... Counterweight, 150 ... Warp pulley

Claims (8)

At least a hoisting machine that drives a sheave around which a main rope that ties a carriage and a counterweight arranged in a hoistway is wound, a machine base to which the hoisting machine is fixed, and the machine base is vibration-proof. In a hoisting machine assembly configured by a machine base mounting member mounted via a mechanism,
A damping through hole is formed in the machine base, a damping shaft fixed to the machine base mounting member on which the machine base is placed is inserted into the damping through hole, and the hoisting machine A hoisting machine assembly characterized in that horizontal vibration is received by the machine base mounting member via the machine base and the damping shaft. The hoist assembly according to claim 1,
A hoisting machine assembly, wherein a damping bracket is fixed to the machine base, and the damping shaft is attached to the damping bracket via a damping rubber bush. In the hoisting machine assembly according to claim 1 or 2,
The machine base mounting member is a machine beam, and the machine base and the machine beam are formed of H-shaped steel. The hoisting machine assembly according to claim 3,
The damping shaft is fixed to the upper plane portion of the H-shaped steel forming the machine beam,
The damping rubber having the damping through hole formed in the lower flat portion of the H-shaped steel forming the machine base and having a damping shaft insertion hole substantially concentric with the damping through hole. The damping bracket to which the bush is fixed is fixed,
The machine base is placed on the machine beam so that a plane portion of the machine beam and a plane portion of the machine base face each other.
The hoisting machine assembly, wherein the damping shaft is press-fitted into a damping rubber bush that is inserted through the damping through hole and fixed to the damping bracket. The hoisting machine assembly according to claim 4,
The damping bracket is fixed to the upper surface of the lower plane portion of the machine base by a fixing bolt, and the fixing bolt is inserted through a fixing bolt insertion hole formed in the lower plane portion of the machine base. A hoisting machine assembly, wherein the damping bracket is fixed to a lower flat portion of the machine base by a nut screwed into a tip. The hoist assembly according to claim 5,
A gap having a predetermined first length is provided between the damping shaft fixed to the upper plane portion of the machine beam and the damping through hole formed in the lower plane portion of the machine base. A hoisting machine assembly characterized in that is formed. The hoisting machine assembly according to claim 6,
A hoisting machine assembly characterized in that a gap of a predetermined second length is formed between the fixing bolt and the bolt fixing insertion hole formed in the lower plane portion of the machine base. Solid. The hoisting machine assembly according to claim 7,
The hoisting machine assembly characterized in that the length of the first predetermined gap is longer than the length of the second predetermined gap.

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