JP6579446B2 - Elevator drive - Google Patents

Description

  The present invention relates to an elevator driving device that winds or unwinds a main rope connected to a car and a counterweight.

  In a drive device for an elevator for a station building installed in a narrow space such as a station platform, a horizontally provided shaft is inserted into a hollow shaft of a hoisting machine rotating unit.

  Then, at the end of the hollow shaft, the retaining member and the shaft are fixed with bolts so that the shaft does not come off.

  However, there is a problem that the shaft and the hollow shaft are worn by contact.

  In Patent Document 1, a bush is provided to prevent wear between the rotating shaft and the hollow shaft of the electric motor.

Moreover, in patent document 2, in order to prevent wear, the resin-made buffer members are provided.

JP 2000-7255 A JP 2009-173436 A

  However, the invention disclosed in Patent Document 1 and Patent Document 2 is to separately provide a bush or a buffer member so that wear does not occur between the shaft and the hollow shaft.

  On the other hand, as shown in FIG. 10, the shaft 10 or the hollow shaft 20 is worn by contact between the shaft 10 and the hollow shaft 20 in which the shaft 10 is inserted. When the shaft 10 or the hollow shaft 20 is worn, a gap is generated between the shaft 10 and the hollow shaft 20.

  The drive sheave 50 is loaded downward by a load of a car or the like. Therefore, a downward load is generated on the shaft 10, and when the gap is generated, the shaft 10 is inclined downward with respect to the hollow shaft 20.

  However, since the retaining plate 30 is pressed against and fixed to the end portion 21 of the hollow shaft 20, it does not tilt downward. Therefore, a load is applied to the bolt 40 that fixes the retaining plate 30 and the shaft 10, and the bolt 40 may be fatigued.

  An object of the present invention is to make it difficult to apply a load to a fixing member (such as a bolt) that fixes a shaft and a retaining member.

  An elevator driving apparatus according to the present invention is an elevator driving apparatus including a hoisting machine and a bearing to which a shaft having a driving sheave for vertically moving an elevator car and a counterweight by a main rope is attached, and the hoisting machine and A hollow shaft attached to the bearing; and a retaining member attached to an end of the shaft; and at least one of the retaining member, the hollow shaft on the hoisting machine side, and the hollow shaft on the bearing side And a gap is provided between them.

  A gap is provided between the retaining member and the hollow shaft. Therefore, even when at least one of the shaft and the hollow shaft is worn, the retaining member is inclined together with the shaft, so that it is difficult to place a burden on the bolt (fixing member) that secures the retaining member to the shaft.

  The retaining member is inserted into the hollow shaft, and a gap is provided between the insertion portion provided with a gap between the hollow shaft and the inner surface of the hollow shaft, and the end surface of the hollow shaft. It is preferable to include a retaining portion provided with a retaining portion.

  A gap is provided between the retaining member and the inner surface of the hollow shaft, and a gap is provided between the retaining member and the end surface of the hollow shaft. Therefore, even when at least one of the shaft and the hollow shaft is worn, the retaining member is tilted together with the shaft, so that it is difficult to place a burden on the bolt (fixing member) that secures the retaining member to the shaft.

  The retaining member is inserted into the hollow shaft, and a gap is provided between an insertion member provided with a gap between the hollow shaft and an inner surface of the hollow shaft, and an end surface of the hollow shaft. It may be provided with a retaining plate on which is provided.

  Even when the retaining member includes the insertion member and the retaining plate, the same effect as described above is obtained. Moreover, it has the effect that manufacture of a retaining member is easy.

  A gap is provided between the end of the shaft and the inner surface of the hollow shaft, and the retaining member is disposed outside the hollow shaft and a gap is provided between the end surface of the hollow shaft. It may be a thing.

  The end of the shaft may play the same role as the insertion portion or the insertion member. Even such a thing has an effect similar to the above.

  It is preferable that the retaining member is fixed to the shaft by a fixing member.

  The fixing member is a bolt or the like, and may be any member as long as it has the same effect as the bolt. The bolt may be any bolt such as a hexagon bolt.

  According to the present invention, it is difficult to apply a load to a fixing member (bolt or the like) that fixes the shaft and the retaining member.

The perspective view of the elevator which concerns on this embodiment. The top view top view of the elevator drive device of the elevator. XX sectional drawing of the elevator drive device. The YY partial sectional view of the hoisting machine of the elevator drive device. The perspective view of the retaining member of the elevator drive device. The perspective view of the retaining member of the elevator drive device which concerns on this embodiment. The YY partial sectional view of the hoisting machine of the elevator drive device concerning this embodiment. The YY partial sectional view of the hoisting machine of the elevator drive device concerning this embodiment. The YY partial sectional view of the hoisting machine of the elevator drive device concerning this embodiment. The YY partial sectional view of the conventional elevator drive hoist.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

(Elevator 100)
As shown in FIG. 1, in the elevator 100, a hoisting machine 200 is installed in the machine room at the top of the hoistway. A car 400 is connected to one end of the first main rope 310 (main rope 300) wound around the first drive sheave 210 of the hoisting machine 200, and a first counterweight 610 is connected to the other end. .

  The second drive sheave 220 is connected to the first drive sheave 210 via the shaft A230. A cage 400 is connected to one end of the second main rope 320 (main rope 300) wound around the second drive sheave 220, and a second counterweight 620 is connected to the other end.

  The first drive sheave 210, the shaft A 230, and the second drive sheave 220 are rotationally driven by the motor 240 of the hoisting machine 200. The first main rope 310 travels with the rotational drive of the first drive sheave 210. The second type lobe 320 travels with the rotational drive of the second drive sheave 220.

  Then, the car 400 suspended by the first main rope 310 and the second main lobe 320 is guided by the first guide rail 410 and moves up and down in the hoistway.

  In the hoistway, a pair of first guide rails 410 that guide the car 400 in the vertical direction and a pair of first guide rails that guide the counterweight 600 (the first counterweight 610 and the second counterweight 620) in the vertical direction. Two guide rails 630 (second guide rail A631 and second guide rail B632) are laid in the vertical direction.

  A first guide roller unit (not shown) corresponding to the pair of first guide rails 410 is attached to the upper and lower ends of the car 400.

  These first guide roller units (not shown) guide the car 400 on the first guide rail 410 in the vertical direction.

  A second guide roller unit (not shown) corresponding to the pair of second guide rails 630 is attached to the upper and lower ends of the counterweight 600.

  These second guide roller units (not shown) guide the counterweight 600 on the second guide rail 630 in the vertical direction.

  In the present embodiment, two counterweights 600 are provided, a first counterweight 610 and a second counterweight 620. Therefore, the second guide rail 630 is also provided with two sets of a pair of second guide rails A631 and a pair of second guide rails B632.

  The elevator 100 is provided with a speed governor 700 that mechanically detects that the ascending / descending speed of the car 400 exceeds a predetermined speed. An endless governor rope 720 is wound around the governor sheave 710 of the governor 700.

  The governor rope 720 is stretched in a tensioned state in parallel with the first main rope 310. A part of the governor rope 720 is fixed to an emergency stop lever (not shown) for operating an emergency stop device (not shown) provided on the car 400 side.

  For this reason, the governor rope 720 travels at the same speed as the car 400 in synchronization with the raising and lowering of the car 400. At this time, the speed governor 700 detects the rotational speed of the governor sheave 710 that is rotated at the same speed as the traveling speed of the governor rope 720, thereby detecting the overspeed of the car 400 that is being raised and lowered.

  When the governor 700 detects that the speed of the car 400 has been exceeded, a gripping mechanism (not shown) grips the governor rope 720 and stops the governor rope 720 from traveling. Then, an emergency stop lever (not shown) fixed to the governor rope 720 is pulled up relative to the car 400.

  When an emergency stop lever (not shown) is pulled up, an emergency stop device (not shown) is activated.

(Elevator drive device 900)
<First Embodiment>
As shown in FIG. 2, the elevator driving device 900 according to the present embodiment includes a hoisting machine 200 that winds or unwinds the first main rope 310, and a shaft A230 into which the first end 231 is inserted into the hoisting machine 200. , A bearing 250 into which a second end (not shown) of the shaft A230 is inserted, and a first drive sheave 210 and a second drive sheave 220 fixed to the shaft A230.

  The hoisting machine 200 includes a motor 240, a speed reducer 260 connected to the motor 240, and a rotary encoder (detector) 270 connected to the motor 240.

  The motor 240, the speed reducer 260, and the rotary encoder 270 are known, and detailed description thereof is omitted or simplified.

  As shown in FIG. 3, the speed reducer 260 has a hollow shaft 261 for inserting the shaft A230. The reducer 260 converts the rotation of the motor 240 into the rotation of the shaft A230. The rotation of the motor 240 is controlled by the control device 800 (described in FIG. 1).

  As shown in FIG. 4, a retaining member A 280 is fixed to the shaft A 230 with a bolt A 283 on the shaft A 230 inserted into the hollow shaft 261 in order to prevent the shaft A 230 from coming off from the hollow shaft 261. .

  The retaining member A 280 in the present embodiment includes an insertion portion 281 that is inserted into the hollow shaft 261 and a retaining portion 282 that is disposed outside the hollow shaft 261.

  A gap is provided between the insertion portion 281 of the retaining member A 280 and the inner surface 263 of the hollow shaft 261.

  Further, the proximal end side (x-axis positive direction side) of the insertion portion 281 protrudes from the hollow shaft 261. A retaining portion 282 is provided on the proximal end side of the insertion portion 281.

  That is, a gap is provided between the end 262 of the hollow shaft 261 and the retaining portion 282 of the retaining member A280.

  The insertion portion 281 of the retaining member A280 is in contact with the first end 231 of the shaft A230, and the retaining member A280 is fixed to the shaft A230 with a bolt (fixing member) 283. In the present embodiment, two bolts A283 are used, but one bolt may be used, or two or more bolts A283 may be used.

  As shown in FIG. 5, in the present embodiment, the retaining member A 280 has a shape obtained by cutting off a part of a circle in the yz plan view.

  In the present embodiment, the retaining member A280 has a through hole 284 for passing the bolt A283. The retaining member A280 is fixed to the shaft A230 through the bolt A283 through the through hole 284.

  In the present embodiment, as shown in FIG. 4, a gap is provided between the inner surface 263 of the hollow shaft 261 and the insertion portion 281.

  As shown in FIG. 6, the retaining member A280 may have a circular shape or a shape other than a circle in the yz plan view.

  The retaining member A280 may be provided not only on the reduction gear 260 side, that is, on the first end portion 231 side of the shaft A230 but also on the second end portion (not shown) on the bearing 250 side. Further, the retaining member A280 may be provided on both sides of the first end 231 and the second end (not shown) of the shaft A230.

  In this case, the other configurations are the same except that the hollow shaft 261 on the reduction gear 260 side is replaced with a hollow shaft (not shown) on the bearing 250 side. Therefore, description of the hollow shaft (not shown) on the bearing 250 side is omitted.

  As shown in FIG. 7, since the retaining member A280 is fixed to the shaft A230, even when the hollow shaft 261 or the shaft A230 is worn, the retaining member A280 is inclined together with the shaft A230. It is difficult to place a burden on the bolt A283 that is a fixing member.

Second Embodiment
As shown in FIG. 8, in the second embodiment, the retaining member B 290 includes an insertion member 291 and a retaining plate 292. In the second embodiment, descriptions similar to those in the first embodiment are simplified or omitted.

  The retaining member B 290 includes an insertion member 291 that is inserted into the hollow shaft 261 and a retaining plate 292 that is disposed outside the hollow shaft 261.

  A gap is provided between the insertion member 291 of the retaining member B 290 and the inner surface 263 of the hollow shaft 261.

  Specifically, the shaft side (x-axis negative direction side) of the insertion member 291 is in contact with the first end 231 of the shaft A230. Further, the base end side (x-axis positive direction side) of the insertion member 291 protrudes from the hollow shaft 261. A retaining plate 292 is provided on the base end surface (the x-axis positive direction side) of the insertion member 291.

  That is, a gap is provided between the end 262 of the hollow shaft 261 and the retaining plate 292 of the retaining member B290.

  The insertion member 291 corresponds to the insertion portion 281 in FIG. The retaining plate 292 corresponds to the retaining portion 282 in FIG.

  That is, the retaining member B290 in the present embodiment is configured such that the retaining member A280 in the first embodiment is divided into the insertion portion 281 and the retaining portion 282. With such a configuration, there is an effect that the retaining member B290 can be easily manufactured.

  Specifically, in the first embodiment, the retaining member A280 needs to be machined by changing the orientation and processing machine in a plurality of stages. However, in this embodiment, the insertion member 291 and the retaining plate 292 only need to cut and punch the plate material, respectively. That is, the retaining member 290 can be easily manufactured.

  The insertion member 291 and the retaining plate 292 are fixed to the shaft A230 by bolts B293. The insertion member 291 and the retaining plate 292 may be joined by welding or the like.

  By fixing such a retaining member B290 to the shaft A230, even if the hollow shaft 261 or the shaft A230 is worn, it is difficult to place a burden on the bolt B293 that is the fixing member.

<Third Embodiment>
As shown in FIG. 9, the third embodiment is configured such that the retaining member C295 is not inserted into the hollow shaft 261. In the third embodiment, descriptions similar to those in the first embodiment or the second embodiment are simplified or omitted.

  A gap is provided between the third end 236 of the shaft B235 and the inner surface 263 of the hollow shaft 261.

  Further, the third end 236 of the shaft B 235 protrudes from the hollow shaft 261. A retaining member C295 is provided at the third end 236 of the shaft B235.

  That is, a gap is provided between the end 262 of the hollow shaft 261 and the retaining member C295.

  A retaining member C295 is attached to the tip of the third end 236 of the shaft B235 by a bolt C296. Therefore, in the third embodiment, the retaining member C295 is not inserted into the hollow shaft 261.

  By fixing such a retaining member C295 to the shaft B235, even if the hollow shaft 261 or the shaft B235 is worn, it is difficult to place a burden on the bolt C296 that is the fixing member.

  The present invention can be implemented in a mode in which various improvements, modifications, or variations are added without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Elevator 200 ... Hoisting machine 210 ... 1st drive sheave (drive sheave)
220 ... 2nd drive sheave (drive sheave)
230 ... Shaft A
231 ... 1st edge part (edge part)
235 ... Shaft B
236 ... Third end (end)
240 ... motor 250 ... bearing 260 ... reduction gear 261 ... hollow shaft 270 ... rotary encoder (detector)
280: Holding member A
281 ... Insertion part 282 ... Stopping part 283 ... Bolt A (fixing member)
290 ... retaining member B
291 ... Insertion member 292 ... Stop plate 293 ... Bolt B (fixing member)
295 ... retaining member C
296 ... Bolt C (fixing member)
400 ... Car 410 ... First guide rail 600 ... Counterweight 630 ... Second guide rail 900 ... Elevator drive device

Claims (5)

An elevator driving device comprising a hoisting machine and a bearing to which a shaft having a driving sheave for vertically moving an elevator car and a counterweight by a main rope is attached,
A hollow shaft attached to the hoist and the bearing;
A retaining member attached to the end of the shaft,
An elevator driving device in which a gap is provided between the retaining member and at least one of the hollow shaft on the hoisting machine side and the hollow shaft on the bearing side. An insertion portion in which the retaining member is inserted into the hollow shaft, and a gap is provided between the inner surface of the hollow shaft;
The elevator driving device according to claim 1, further comprising: a retaining portion that is disposed outside the hollow shaft and is provided with a gap between the end surface of the hollow shaft. An insertion member in which the retaining member is inserted into the hollow shaft and a gap is provided between the inner surface of the hollow shaft;
The elevator driving device according to claim 1, further comprising: a retaining plate that is disposed outside the hollow shaft and is provided with a clearance between the end surface of the hollow shaft. A gap is provided between the end of the shaft and the inner surface of the hollow shaft, and the retaining member is disposed outside the hollow shaft and a gap is provided between the end surface of the hollow shaft. The elevator driving device according to claim 1. The elevator driving device according to claim 1, wherein the retaining member is fixed to the shaft by a fixing member.

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