JP2002173278A - Hydraulic power unit of hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic power unit of a hydraulic elevator to secure safety of a passenger by carrying out rescue operation at the time when motive power of an electric motor pulley cannot be properly transmitted to a pump pulley. SOLUTION: A control device 12 carries out the rescue operation of a car at the time when a position detection device 25 which is a motive power transmission abnormality detection device detects the abnormality of motive power transmission to a hydraulic pump 16 from an electric motor 17 in accordance with a rotational cycle of the pump pulley 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic power unit for a hydraulic elevator that raises and lowers a car by supplying oil in an oil tank to a hydraulic jack through a pipe.

[0002]

2. Description of the Related Art In general, there are two types of hydraulic elevators: a direct type in which a hydraulic jack is directly moved up and down from a position directly below a car, and an indirect type in which a car is raised and lowered using a hydraulic jack, a sheave and a rope. . Both of these types include a hydraulic power unit that drives a hydraulic jack.

FIG. 17 is a schematic configuration diagram of an indirect hydraulic elevator. A hydraulic jack 1 is erected in a building, and a rope hitch 2 of the hydraulic jack 1 and a rope hitch 3 under a car are connected to a rope 6 via a plunger sheave 5 mounted on a plunger 4. Thus, the car 7 is moved up and down along the guide rail 9 in the hoistway 8 by the vertical movement of the plunger 4.

A hydraulic power unit 10, which is a drive source of the hydraulic jack 1, is generally installed in a machine room 11 adjacent to the hoistway 8, and is controlled by a control device 12. Oil from the hydraulic power unit 10 is supplied to the hydraulic jack 4 through the pipe 13.

FIG. 18 is a perspective view of the hydraulic power unit 10. As shown in FIG. 18, an oil tank 15 is provided on a gantry 14, and oil in the oil tank 15 is sucked and discharged by a hydraulic pump 16. The hydraulic pump 16 is an electric motor 17
Driven by

That is, the electric motor 17 has the electric motor pulley 1
The hydraulic pump 16 is provided with a pump pulley 1.
A belt 20 is wound around the electric motor pulley 18 and the pump pulley 19, and the driving force of the electric motor 17 is transmitted to the hydraulic pump 16 via the belt 20. A flow control valve (hereinafter, referred to as a valve) 21 is provided on the discharge side of the hydraulic pump 16. The valve 21 and the hydraulic jack 1 are connected by a pipe 13, and oil is supplied to the hydraulic jack 1. It has become.

FIG. 19 is a detailed view showing a connection portion between the hydraulic pump 16 and the pump pulley 19 of the hydraulic power unit 10. As shown in FIG. 19, a hydraulic pump 16 connected to a pump pulley
The mechanical seal 23 prevents leakage of the oil.

When raising the car 7, the control device 12
The hydraulic pump 16 drives the hydraulic pump 16 to suck the oil in the oil tank 15 and control the flow rate of the oil through the valve 21 on the discharge side.
Pump inside. As a result, the plunger 4 of the hydraulic jack 1 rises, and the car 7 thereon is pushed up and rises to the destination floor. On the other hand, when the car is lowered, the valve 21 is switched by the control device 12 and the oil in the hydraulic jack 1 is returned to the oil tank 15 while controlling the flow rate of the oil in the hydraulic jack from the pipe 13 through the valve 21 by the weight of the car 7. Thereby, the car 7 together with the plunger 4 of the hydraulic jack 1
Descends to the destination floor.

[0009]

However, when the motor pulley 18 is worn, the power of the motor pulley 18 cannot be properly transmitted to the pump pulley 19 via the belt 20. In that case, the operation of the car 7 may be hindered.

In addition, the power of the motor pulley 18 can be properly adjusted even if the belt 20 is stretched, the tension is insufficient due to insufficient adjustment of the belt 20, or the belt 20 is worn.
Can not be transmitted to Even in such a case, the driving of the car may be hindered. Therefore, it is desirable that the car 7 be stopped at the nearest floor and the passengers safely get off the car 7.

It is an object of the present invention to provide a hydraulic power unit for a hydraulic elevator which performs a rescue operation when the power of an electric motor pulley cannot be properly transmitted to a pump pulley to thereby ensure passenger safety.

[0012]

A hydraulic power unit for a hydraulic elevator according to the first aspect of the present invention is a hydraulic power unit for a hydraulic elevator that supplies oil in an oil tank to a hydraulic jack through a pipe to raise and lower a car. A hydraulic pump that discharges oil in the oil tank, an electric motor that drives the hydraulic pump, and an electric motor pulley provided on a rotating shaft of the electric motor that drives the hydraulic pump,
A pump pulley provided on a rotary shaft of the hydraulic pump,
A belt for linking the electric motor pulley and the pump pulley, a power transmission abnormality detecting device for detecting an abnormality in power transmission from the electric motor to the hydraulic pump, and the power transmission abnormality detecting device detecting the power transmission abnormality And a control device for performing a rescue operation of the car when the operation is performed.

[0013] In the hydraulic power unit of the hydraulic elevator according to the first aspect of the present invention, when the power transmission abnormality detecting device detects an abnormality in power transmission from the electric motor to the hydraulic pump, the controller performs a car rescue operation. Do.

According to a second aspect of the present invention, in the hydraulic power unit for a hydraulic elevator, in addition to the operation of the first aspect, the control device is configured to control when the detection period of the detected object by the position detection device is larger than a predetermined period. Then, it is determined that the power transmission from the electric motor to the hydraulic pump is abnormal, and the car is rescued.

According to a third aspect of the present invention, in the hydraulic power unit of the hydraulic elevator according to the first aspect of the present invention, the power transmission abnormality detecting device detects a speed of the pump pulley, a rotating shaft of the hydraulic pump, or the belt. The control device performs the rescue operation of the car when the speed detected by the speed detection device becomes lower than a predetermined speed.

According to a third aspect of the present invention, in the hydraulic power unit for a hydraulic elevator, in addition to the operation of the first aspect, the control device is configured to control the electric motor when the speed detected by the speed detecting device becomes lower than a predetermined speed. Is judged to be abnormal in power transmission from the hydraulic pump to the hydraulic pump, and the car is rescued.

According to a fourth aspect of the present invention, in the hydraulic power unit of the hydraulic elevator according to the first aspect of the present invention, the power transmission abnormality detecting device comprises a current detecting device for detecting a load current of the electric motor, and the control device Is characterized in that the rescue operation of the car is performed when a current detected by the current detection device becomes smaller than a predetermined current.

According to a fourth aspect of the present invention, in the hydraulic power unit for a hydraulic elevator, in addition to the operation of the first aspect, the control device is configured to control the motor when the current detected by the current detecting device becomes smaller than a predetermined current. Is judged to be abnormal in power transmission from the hydraulic pump to the hydraulic pump, and the car is rescued.

According to a fifth aspect of the present invention, in the hydraulic power unit of the hydraulic elevator according to the first aspect of the present invention, the power transmission abnormality detecting device comprises a tension detecting device for detecting a tension of the belt, and the control device comprises The rescue operation of the car is performed when the tension detected by the tension detecting device becomes smaller than a predetermined tension.

According to a fifth aspect of the present invention, in the hydraulic power unit for a hydraulic elevator, in addition to the operation of the first aspect of the invention, the control device controls the electric motor when the tension detected by the tension detecting device becomes smaller than a predetermined tension. Is judged to be abnormal in power transmission from the hydraulic pump to the hydraulic pump, and the car is rescued.

According to a sixth aspect of the present invention, in the hydraulic power unit of the hydraulic elevator according to the first aspect of the present invention, the power transmission abnormality detecting device comprises a temperature detecting device for detecting a temperature of the electric motor pulley or the belt. The control device performs a rescue operation of the car when a temperature detected by the temperature detection device becomes higher than a predetermined temperature.

According to a sixth aspect of the present invention, in the hydraulic power unit for a hydraulic elevator, in addition to the operation of the first aspect, the control device may control the electric motor when the temperature detected by the temperature detecting device becomes higher than a predetermined temperature. Is judged to be abnormal in power transmission from the hydraulic pump to the hydraulic pump, and the car is rescued.

According to a seventh aspect of the present invention, in the hydraulic power unit of the hydraulic elevator according to the first aspect, the power transmission abnormality detecting device comprises a sound collecting device for detecting a frictional noise between the electric motor pulley and the belt. The control device performs a rescue operation of the car when the detected friction noise in the sound collection device becomes larger than a predetermined friction noise.

According to a seventh aspect of the present invention, in the hydraulic power unit for a hydraulic elevator, in addition to the operation of the first aspect of the invention, the control device controls the electric motor when the frictional sound detected by the sound collecting device becomes larger than a predetermined frictional sound. Is judged to be abnormal in power transmission from the hydraulic pump to the hydraulic pump, and the car is rescued.

According to an eighth aspect of the present invention, in the hydraulic power unit of the hydraulic elevator according to the first aspect, the power transmission abnormality detecting device comprises an odor detecting device for detecting the odor of the belt, and the control device includes: The rescue operation of the car is performed when the odor detected by the odor detection device becomes larger than a predetermined odor.

In a hydraulic power unit for a hydraulic elevator according to an eighth aspect of the present invention, in addition to the operation of the first aspect of the present invention, the control device controls the electric motor when the odor detected by the odor detector becomes larger than a predetermined odor. Is judged to be abnormal in power transmission from the hydraulic pump to the hydraulic pump, and the car is rescued.

According to a ninth aspect of the present invention, in the hydraulic power unit of the hydraulic elevator according to the first aspect of the present invention, the power transmission abnormality detecting device is configured to control an oil speed in a pipe for supplying oil from an oil tank to the hydraulic jack. The control device performs a rescue operation of the car when an oil speed detected by the oil speed detecting device is higher than a predetermined oil speed.

In the hydraulic power unit for a hydraulic elevator according to the ninth aspect of the present invention, in addition to the operation of the first aspect of the present invention, the control device may be arranged such that the oil speed detected by the oil speed detecting device is higher than a predetermined oil speed. At this time, it is determined that the power transmission from the electric motor to the hydraulic pump is abnormal, and the car is rescued.

[0029]

Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a first embodiment of the present invention. FIG. 1 (a) is a schematic front view, and FIG. 1 (b) is a side view.

A detection object 24 is attached to the pump pulley 19, and the position of the detection object 24 changes with the rotation of the pump pulley 19. The position detecting device 25 detects the position of the detection object 24, and detects the detection object 24 every time the pump pulley 19 makes one rotation. These detected objects 2
4 and the position detection device 25 form a power transmission abnormality detection device.

A detection signal of the detection object 24 of the position detection device 25 is input to the control device 12. When the detection period of the detection object 24 by the position detection device 25 becomes longer than the predetermined period, the control device 12 performs the rescue operation of the vehicle that determines that the power transmission from the electric motor 17 to the hydraulic pump 16 has become abnormal.

FIG. 2 is a flowchart showing the processing operation of the control device 12 according to the first embodiment. Basket 7
Is determined to be an ascending operation or a descending operation (S1). If the car 7 is in the ascending operation, the control device 12 outputs a motor rotation command to the electric motor 17 (S2). Thereby, the electric motor pulley 18 rotates and the pump pulley 17 rotates via the belt 20.

Then, it is determined whether or not a predetermined time t1 has elapsed until the motor 17 reaches the constant speed range (S3).
When the electric motor 17 starts rotating at a constant speed after the lapse of the fixed time t1, the detection cycle T1 of the detection object 24 of the position detecting device 25 is detected. That is, the position of the detection object 24 is detected with a period of one pulse per rotation as a period T1.

Next, the set period T, which is 110% of the rated period, is compared with the detection period T1 (S4). If the actual detected period T1 is larger than the set period T (T <T1), For example, it is determined that the belt 20 has slipped and the power transmission from the motor 17 to the hydraulic pump 16 has become abnormal, and the motor rotation command from the control device 12 to the motor 17 is stopped (S5). Then, the valve 21 on the discharge side of the oil tank 15 is controlled (S6) and lowered by the weight of the car 7,
The car 7 is landed on the nearest floor (S7). When the car 7 arrives at the nearest floor, the door of the car 7 is opened (S8), passengers are dropped off (S9), the elevator is stopped at that floor (S10), and an elevator stop signal is output to the outside of the management company or the like. (S1
1).

On the other hand, if it is determined in step S4 that the actual detection period T1 is shorter than the set period T (T ≧ T1), it is determined that the operation is normal and normal operation is continued. Also,
If the car 7 descends in the determination in step S1, the electric motor 17 is not used for the descending operation of the car 7, so that the detection by the position detecting device 25 is not performed.

As described above, according to the first embodiment, the detection object 24 is provided on the pump pulley 19 to which power is transmitted, and the detection object 24 that changes its position with the rotation of the pump pulley 19 is positioned. Since the detection is performed by the detection device 25 to determine whether or not the rotation cycle of the pump pulley 19 is normal, it can be easily determined whether or not the power from the electric motor 17 is properly transmitted to the oil pump 16. Although the detection object 24 is attached to the pump pulley 19, the detection object 24 may be provided on the rotating shaft of the hydraulic pump on the side where power is transmitted or on the belt 20 for transmitting power.

Next, a second embodiment of the invention will be described. FIG. 3 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a second embodiment of the present invention. In the second embodiment, a speed detection device 26 that detects the speed of the belt 20 is used as a power transmission abnormality detection device that detects an abnormality in power transmission from the electric motor 17 to the hydraulic pump 16.

The belt 20 detected by the speed detecting device 26
Is input to the controller 12. The control device 12
When the speed detected by the speed detecting device 26 becomes lower than the predetermined speed, it is determined that power transmission from the electric motor 17 to the hydraulic pump 16 is abnormal, and the car 7 is rescued.

FIG. 4 is a flowchart showing the processing operation of the control device 12 according to the second embodiment. Basket 7
Is determined to be an ascending operation or a descending operation (S1). If the car 7 is in the ascending operation, the control device 12 outputs a motor rotation command to the electric motor 17 (S2). Thereby, the electric motor pulley 18 rotates and the pump pulley 17 rotates via the belt 20.

Then, it is determined whether or not a certain time t1 has elapsed until the motor 17 reaches the constant speed range (S3).
When the electric motor 17 starts rotating at a constant speed after a lapse of the fixed time t1, the detected speed V which is the output of the speed detecting device 26 is used.
1 is input to the control device 12.

Next, the set speed V, which is 90% of the rated speed, is compared with the detected speed V1 (S4). If the actual detected speed V1 is smaller than the set speed V (V> V1),
For example, it is determined that the belt 20 has slipped and the power transmission from the motor 17 to the hydraulic pump 16 has become abnormal, and the motor rotation command from the control device 12 to the motor 17 is stopped (S5). The valve 21 on the discharge side of the oil tank 15
Is controlled (S6), the car 7 is lowered by its own weight, and the car 7 is landed on the nearest floor (S7). When the car 7 arrives at the nearest floor, the door of the car 7 is opened (S8), and the passenger is unloaded (S8).
9), stop the elevator at that floor (S10), and output an elevator stop signal to the outside (S11).

On the other hand, if it is determined in step S4 that the actual detected speed V1 is equal to or higher than the set speed V (V ≦ V1), it is determined that the speed is normal, and normal operation is continued. Also,
If the car 7 descends in the determination of the step S1, the motor 17 is not used for the descending operation of the car 7, so that the detection by the speed detecting device 26 is not performed.

As described above, according to the second embodiment, the speed of the belt 20 for transmitting power is detected by the speed detecting device 26 to determine whether or not the speed of the belt 20 is within the normal range. Therefore, it can be easily determined whether or not the power from the electric motor 17 is properly transmitted to the oil pump 16. Although the speed detecting device 26 detects the speed of the belt 20, the speed detecting device 26 may detect the speed of the rotating shaft of the hydraulic pump 16 or the speed of the pump pulley 19 to which power is transmitted.

Next, a third embodiment of the invention will be described. FIG. 5 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a third embodiment of the present invention. In the third embodiment, a current detection device 27 that detects a load current I1 of the electric motor 17 is used as a power transmission abnormality detection device that detects an abnormality in power transmission from the electric motor 17 to the hydraulic pump 16. .

Motor 17 detected by current detecting device 27
Is input to the control device 12. When the detection current I1 from the current detection device 27 becomes smaller than the predetermined current I, the control device 12 determines that the power transmission from the electric motor 17 to the hydraulic pump 16 is abnormal, and performs the rescue operation of the car 7.

FIG. 6 is a flowchart showing the processing operation of the control device 12 according to the third embodiment. Basket 7
Is determined to be an ascending operation or a descending operation (S1). If the car 7 is in the ascending operation, the control device 12 outputs a motor rotation command to the electric motor 17 (S2). Thereby, the electric motor pulley 18 rotates and the pump pulley 17 rotates via the belt 20.

Then, it is determined whether or not a predetermined time t1 has elapsed until the motor 17 reaches the constant speed range (S3).
When the electric motor 17 starts rotating at a constant speed after the elapse of the fixed time t1, the detection current I which is the output of the current detection device 27 is output.
1 is input to the control device 12.

Next, the set current I, which is 90% of the rated load current, is compared with the detected current I1 (S4). When the actual detected current I1 is smaller than the set current I (I> I1), For example, it is determined that the belt 20 has slipped and the power transmission from the electric motor 17 to the hydraulic pump 16 has become abnormal, and the motor rotation command from the control device 12 to the electric motor 17 is stopped (S5). Then, the valve 21 on the discharge side of the oil tank 15 is controlled (S6) and lowered by the weight of the car 7,
The car 7 is landed on the nearest floor (S7). When the car 7 arrives at the nearest floor, the door of the car 7 is opened (S8), the passenger is dropped off (S9), the elevator stops at that floor (S10), and an elevator stop signal is output to the outside (S11).

On the other hand, if it is determined in step S4 that the actual detected current I1 is equal to or greater than the set current I (I ≦ I1), it is determined that the current is normal and normal operation is continued. Also,
When the car 7 descends in the determination in step S1, the electric motor 17 is not used for the descending operation of the car 7, so that the detection by the current detecting device 27 is not performed.

As described above, according to the third embodiment, the load current I1 of the motor 17 is detected by the current detecting device 26, and it is determined whether the load current I1 is in the normal range. Therefore, it can be easily determined whether or not the power from the electric motor 17 is properly transmitted to the oil pump 16.

Next, a fourth embodiment of the invention will be described. FIG. 7 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a fourth embodiment of the present invention. In the fourth embodiment, a tension detection device 28 that detects the tension of the belt 20 is used as a power transmission abnormality detection device that detects an abnormality in power transmission from the electric motor 17 to the hydraulic pump 16.

The tension F1 of the belt detected by the tension detector 28 is input to the controller 12. The control device 12
When the detected tension F1 from the tension detecting device 28 becomes smaller than the predetermined tension F, it is determined that the power transmission from the electric motor 17 to the hydraulic pump 16 is abnormal, and the car 7 is rescued.

FIG. 8 is a flowchart showing the processing operation of the control device 12 according to the fourth embodiment. First,
In operation of the car 7, the set tension F, which is 90% of the rated tension, is compared with the detected tension F1 (S1). If the actual detected tension F1 is smaller than the set tension F (F> F1), an abnormality is detected. Is determined, the elevator is stopped (S10),
An elevator stop signal is output (S11).

If the actual detected tension F1 is larger than the set tension F (F <F1), it is determined whether the car 7 is in the ascending operation or in the descending operation (S2). The controller 12 outputs a motor rotation command to the motor 17 (S3). Thereby, the electric motor pulley 18 rotates and the pump pulley 17 rotates via the belt 20.

Next, the set tension F is compared with the detected tension F1 (S4). If the actual detected tension F1 is smaller than the set tension F (F> F1), for example, the belt 20 has slippage. It is determined that the power transmission from the electric motor 17 to the hydraulic pump 16 has become abnormal, and the motor 1
7 is stopped (S5). Then, the valve 21 on the discharge side of the oil tank 15 is controlled (S6), the car 7 is lowered by its own weight, and the car 7 is landed on the nearest floor (S7). When the car 7 arrives at the nearest floor, the door of the car 7 is opened (S8), the passenger is dropped off (S9), the elevator stops at that floor (S10), and an elevator stop signal is output to the outside (S11).

On the other hand, if it is determined in step S4 that the actual detected tension F1 is equal to or higher than the set tension F (F ≦ F1), it is determined to be normal and normal operation is continued. Also,
If the car 7 descends in the determination of step S2, the electric motor 17 is not used for the descending operation of the car 7, so that the detection by the tension detecting device 28 is not performed.

As described above, according to the fourth embodiment, the tension F1 of the belt 20 is detected by the tension detecting device 28, and it is determined whether the tension F1 is within the normal range. Whether or not the power from the electric motor 17 is properly transmitted to the oil pump 16 can be easily determined.

Next, a fifth embodiment of the invention will be described. FIG. 9 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a fifth embodiment of the present invention. In the fifth embodiment, an electric motor pulley 18 temperature detecting device 29 is used as a power transmission abnormality detecting device for detecting an abnormal power transmission from the electric motor 17 to the hydraulic pump 16.

The detected temperature Q1 of the temperature detecting device 29 is input to the control device 12. The control device 12 controls the temperature detection device 2
When the detected temperature Q1 detected in step 9 becomes higher than the predetermined temperature Q, the rescue operation is performed only when it is determined that the power transmission from the electric motor 17 to the hydraulic pump 16 has become abnormal.

FIG. 10 is a flowchart showing the processing operation of the control device 12 according to the fifth embodiment. First, when the car 7 is operated, the electric motor pulley 18 at the rated time is used.
Temperature Q set to 110% of the temperature and the temperature detecting device 29
Is compared with the detected temperature Q1 (S1), and when the actual detected temperature Q1 is higher than the set temperature Q (Q <Q1), it is determined that the temperature is abnormal, the elevator is stopped (S10), and the elevator stop signal is output. Is output (S11).

If the actual detected temperature Q1 is lower than the set temperature Q (Q> Q1), it is determined whether the car 7 is in ascending operation or in descending operation (S2). If the car 7 is in ascending operation, The controller 12 outputs a motor rotation command to the motor 17 (S3). Thereby, the electric motor pulley 18 rotates, and the pump pulley 19 rotates via the belt 20. In this case, when the motor pulley 18 and the belt 20 run idle when the pump pulley 19 rotates via the belt 20, the temperature of the motor pulley 18 increases.

Then, the set temperature Q of the motor pulley 18 is compared with the detected temperature Q1 (S4), and the actual detected temperature Q1 is determined.
Is larger than the set temperature Q (Q <Q1), for example, the belt 20 has slippage and the motor 17
6 is determined to be abnormal, and the control device 12
From the motor 17 to the motor 17 is stopped (S
5). Then, the valve 21 on the discharge side of the oil tank 15 is controlled (S6), the car 7 is lowered by its own weight, and the car 7 is landed on the nearest floor (S7). When the car 7 arrives at the nearest floor, the door of the car 7 is opened (S8), and the passenger is unloaded (S8).
9), stop the elevator at that floor (S10), and output an elevator stop signal to the outside (S11).

On the other hand, if it is determined in step S4 that the actual detected temperature Q1 is equal to or lower than the set temperature Q (Q ≧ Q1), it is determined that the temperature is normal and normal operation is continued. Also,
When the car 7 descends in the determination in step S2, the electric motor 17 is not used for the descending operation of the car 7, so that the detection by the temperature detecting device 29 is not performed.

As described above, according to the fifth embodiment, the temperature detecting device 29 for detecting the temperature of the motor pulley 18 on the power transmission side is provided.
Since it is determined whether or not the detected temperature Q1 detected in step (1) is within the normal range, it can be easily determined whether or not the power from the electric motor 17 is properly transmitted to the oil pump 16. Although the temperature detecting device 29 detects the temperature of the electric motor pulley 18, the temperature detecting device 29 may detect the temperature of the belt 20.

Next, a sixth embodiment of the present invention will be described. FIG. 11 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a sixth embodiment of the present invention. This sixth embodiment is different from the electric motor 17 in that the hydraulic pump 16
As a power transmission abnormality detection device that detects an abnormality in power transmission to the motor, a sound collection device 30 that detects a friction noise between the electric motor pulley 18 and the belt 20 is used.

The detected fricative noise S1 detected by the sound collector 30
Is input to the control device 12. When the detected friction sound S1 detected by the sound collection device 30 becomes larger than the predetermined friction sound S, the control device 12 performs a rescue operation of the vehicle that determines that the power transmission from the electric motor 17 to the hydraulic pump 16 has become abnormal.

FIG. 12 is a flowchart showing the processing operation of the control device 12 according to the sixth embodiment. It is determined whether the car 7 is in ascending operation or in descending operation (S1). If the car 7 is in ascending operation, the control device 12
(S2). Thereby, the electric motor pulley 18 rotates and the pump pulley 17 rotates via the belt 20. In this case, when the electric motor pulley 18 and the belt 20 run idle when the pump pulley 19 rotates via the belt 20, the friction noise increases.

Next, it is determined whether or not a predetermined time t1 has elapsed until the motor 17 reaches the constant speed range (S3). If the predetermined time t1 has elapsed and the motor 17 starts rotating at a constant speed, The frictional sound detected from the sound collecting device 30 is detected and input to the control device 12.

Then, 110% of the frictional noise between the motor pulley 18 and the belt 20 at the rated time is set as the set frictional noise S, and the set frictional noise S is compared with the detection period T1 (S4). If greater than S (S <
In S1), for example, the belt 20 has a slip and the motor 1
It is determined that the power transmission from the control unit 7 to the hydraulic pump 16 has become abnormal, and the motor rotation command from the control device 12 to the motor 17 is stopped (S5). Then, the valve 21 on the discharge side of the oil tank 15 is controlled (S6), the car 7 is lowered by its own weight, and the car 7 is landed on the nearest floor (S7). Basket 7
When landing on the nearest floor, the door of the car 7 is opened (S8), the passenger is lowered (S9), the elevator is stopped (S10), and an elevator stop signal is output (S11).

On the other hand, if it is determined in step S4 that the actual detection period T1 is shorter than the set period T (T ≧ T1), it is determined that the operation is normal and normal operation is continued. Also,
If the car 7 descends in the determination of step S1, the electric motor 17 is not used for the descending operation of the car 7, so that the detection by the sound collecting device 30 is not performed.

As described above, according to the sixth embodiment, the sound collecting device 30 detects the friction noise between the electric motor pulley 10 and the belt 20 to determine whether the power transmission is normal. Therefore, it can be easily determined whether or not the power from the electric motor 17 is properly transmitted to the oil pump 16.

Next, a seventh embodiment of the present invention will be described. FIG. 13 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a seventh embodiment of the present invention. This seventh embodiment is different from the electric motor 17 in that the hydraulic pump 16
An odor detection device 31 that detects an odor of the belt 20 is used as a power transmission abnormality detection device that detects an abnormality in power transmission to the belt.

The odor N1 detected by the odor detection device 31 is input to the control device 12. The control device 12 controls the odor detection device 3
When the detected odor N1 detected in Step 1 becomes higher than the predetermined temperature N, the rescue operation is performed only when it is determined that the power transmission from the electric motor 17 to the hydraulic pump 16 has become abnormal.

FIG. 14 is a flowchart showing the processing operation of the control device 12 according to the seventh embodiment. First, when the car 7 is operated, the electric motor pulley 18 at the rated time is used.
The odor N set to 110% of the odor of the belt and the belt 20 and the detected odor N1 detected by the odor detection device 31 are compared (S1), and when the actual detected odor N1 is larger than the set odor N (N <N1) ), The elevator is determined to be abnormal, the elevator is stopped at the rescue floor (S10), and an elevator stop signal is output to the outside (S11).

If the actually detected odor N1 is smaller than the set odor N (N> N1), it is determined whether the car 7 is in ascending operation or descending operation (S2). If the car 7 is in ascending operation, The controller 12 outputs a motor rotation command to the motor 17 (S3). Thereby, the electric motor pulley 18 rotates, and the pump pulley 19 rotates via the belt 20. In this case, if the electric motor pulley 18 and the belt 20 run idle when the pump pulley 19 rotates via the belt 20, the belt 20 emits a burning odor.

Next, the set odor N of the electric motor pulley 18 is compared with the detected odor N1 (S4). If the actual detected odor N1 is larger than the set odor N (N <N1), for example, the belt 20 slips. From the electric motor 17 to the hydraulic pump 16
Is determined to be abnormal, and the motor rotation command from the control device 12 to the motor 17 is stopped (S
5). Then, the valve 21 on the discharge side of the oil tank 15 is controlled (S6), the car 7 is lowered by its own weight, and the car 7 is landed on the nearest floor (S7). When the car 7 arrives at the nearest floor, the door of the car 7 is opened (S8), and the passenger is unloaded (S8).
9), stop the elevator at that floor (S10), and output an elevator stop signal to the outside (S11).

On the other hand, if it is determined in step S4 that the actual detected odor N1 is equal to or smaller than the set odor N (N ≧ N1), it is determined that the odor is normal and normal operation is continued. Also,
If the car 7 descends in the determination of step S2, the electric motor 17 is not used for the descending operation of the car 7, so that the detection by the odor detecting device 31 is not performed.

As described above, according to the seventh embodiment, the odor detecting device 31 for detecting the odor of the belt 20 for transmitting power is provided, and the odor N1 detected by the odor detecting device 31 is normal. Since it is determined whether or not it is within the range, the power from the electric motor 17
Can be easily determined.

Next, an eighth embodiment of the present invention will be described. FIG. 15 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to an eighth embodiment of the present invention. This eighth embodiment is different from the electric motor 17 in that the hydraulic pump 16
An oil speed detection device 32 that detects an oil speed in a pipe 13 that supplies oil from the oil tank 15 to the hydraulic jack 1 is used as a power transmission abnormality detection device that detects an abnormality in power transmission to the hydraulic jack 1.

The oil speed U1 detected by the oil speed detecting device 32 is input to the control device 12. When the detected oil speed U1 detected by the oil speed detection device 32 becomes higher than the predetermined temperature U, the control device 12 determines that the power transmission from the electric motor 17 to the hydraulic pump 16 has become abnormal, and performs the rescue operation of the car. Do.

FIG. 16 is a flowchart showing the processing operation of the control device 12 according to the eighth embodiment. It is determined whether the car 7 is going up or down (S1). If the car 7 is going up, the control device 12 sends the electric motor 17
(S2). Thereby, the electric motor pulley 18 rotates and the pump pulley 17 rotates via the belt 20.

Then, it is determined whether or not a predetermined time t1 has elapsed until the electric motor 17 reaches the constant speed range (S3).
When the electric motor 17 starts rotating at a constant speed after the lapse of the fixed time t1, the detected oil speed U1, which is the output of the oil speed detecting device 32, is input to the control device 12.

Next, the set oil speed U, which is 90% of the rated oil speed, is compared with the detected oil speed U1 (S4). When the actual detected oil speed U1 is smaller than the set oil speed U (U> U
In 1), for example, the belt 20 has a slip and the motor 17
It is determined that the power transmission from the controller to the hydraulic pump 16 has become abnormal, and the motor rotation command from the control device 12 to the motor 17 is stopped (S5). Then, the valve 21 on the discharge side of the oil tank 15 is controlled (S6), the car 7 is lowered by its own weight, and the car 7 is landed on the nearest floor (S7). When the car 7 arrives at the nearest floor, the door of the car 7 is opened (S8), the passenger is unloaded (S9), and the elevator is stopped at that floor (S1).
0), and outputs an elevator stop signal to the outside (S1).
1).

On the other hand, when it is determined in step S4 that the actual detected oil speed U1 is higher than the set oil speed U (U ≦ U1)
, It is determined to be normal and normal operation is continued. When the car 7 descends in the determination in step S1, the motor 17 is not used for the descending operation of the car 7, so that the oil speed detecting device 32 does not perform the detection.

As described above, according to the eighth embodiment, the oil speed in the pipe 13 for supplying oil from the oil tank 15 to the hydraulic jack 1 is detected by the oil speed detecting device 32, and the oil speed is detected. Since it is determined whether or not U1 is in the normal range, it can be easily determined whether or not the power from the electric motor 17 is properly transmitted to the oil pump 16.

[0086]

As described above, according to the present invention, it is possible to determine whether or not the power of the electric motor pulley is properly transmitted to the pump pulley via the belt. The rescue operation is performed, so the elevator can be operated safely.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a processing operation of the control device according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing a processing operation of a control device according to a second embodiment of the present invention.

FIG. 5 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a third embodiment of the present invention.

FIG. 6 is a flowchart showing a processing operation of a control device according to a third embodiment of the present invention.

FIG. 7 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a fourth embodiment of the present invention.

FIG. 8 is a flowchart showing a processing operation of a control device according to a fourth embodiment of the present invention.

FIG. 9 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a fifth embodiment of the present invention.

FIG. 10 is a flowchart showing a processing operation of a control device according to a fifth embodiment of the present invention.

FIG. 11 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a sixth embodiment of the present invention.

FIG. 12 is a flowchart showing a processing operation of a control device according to a sixth embodiment of the present invention.

FIG. 13 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to a seventh embodiment of the present invention.

FIG. 14 is a flowchart showing a processing operation of a control device according to a seventh embodiment of the present invention.

FIG. 15 is a configuration diagram of a hydraulic power unit of a hydraulic elevator according to an eighth embodiment of the present invention.

FIG. 16 is a flowchart showing a processing operation of a control device 12 according to an eighth embodiment of the present invention.

FIG. 17 is a schematic configuration diagram of an indirect hydraulic elevator.

FIG. 18 is a perspective view of a hydraulic power unit.

FIG. 19 is a detailed view showing a connection portion between a hydraulic pump and a pump pulley of the hydraulic power unit.

[Explanation of symbols]

1: hydraulic jack, 2, 3: rope hitch, 4: plunger, 5: plunger sieve, 6: rope, 7: basket,
8 hoistway, 9 guide rail, 10 hydraulic power unit, 11 machine room, 12 control device, 13 piping, 1
4 ... Base, 15 ... Oil tank, 16 ... Hydraulic pump, 17 ...
Electric motor, 18: electric motor pulley, 19: pump pulley, 2
0 ... belt, 21 ... valve, 22 ... rotary shaft, 23 ... mechanical seal, 24 ... detected object, 25 ... position detecting device, 2
6 speed detector, 27 current detector, 28 tension detector, 29 temperature detector, 30 sound collector, 31
Odor detector 32, oil speed detector

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Akihiko Hirata 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in Fuchu Works, Toshiba Corporation 3F304 CA13 EA18 EA20 EA29 EA31 EB05

Claims (9)

[Claims] 1. A hydraulic power unit for a hydraulic elevator that raises and lowers a car by supplying oil in an oil tank through a pipe to a hydraulic jack, and drives a hydraulic pump that discharges the oil in the oil tank and the hydraulic pump. An electric motor, an electric motor pulley provided on a rotating shaft of the electric motor for driving the hydraulic pump, a pump pulley provided on the rotating shaft of the hydraulic pump, a belt for interlocking the electric motor pulley and the pump pulley, and the electric motor A power transmission abnormality detection device that detects an abnormality in power transmission from the hydraulic pump to the hydraulic pump; and a control device that performs a car rescue operation when the power transmission abnormality detection device detects the power transmission abnormality. A hydraulic power unit for a hydraulic elevator. 2. The power transmission abnormality detection device includes: a detection object attached to the pump pulley, a rotation shaft of the hydraulic pump, or the belt; and a position detection device that detects a position of the detection object. 2. The hydraulic power unit for a hydraulic elevator according to claim 1, wherein the control device performs the rescue operation of the car when a detection cycle of the detection object by the position detection device is larger than a predetermined cycle. 3. 3. The power transmission abnormality detecting device includes a speed detecting device that detects a speed of the pump pulley, a rotation shaft of the hydraulic pump, or the belt, and the control device detects a speed detected by the speed detecting device. 2. The hydraulic power unit for a hydraulic elevator according to claim 1, wherein the rescue operation of the car is performed when the vehicle speed becomes lower than a predetermined speed. 4. The power transmission abnormality detection device includes a current detection device that detects a load current of the electric motor, and the control device controls the car when a current detected by the current detection device becomes smaller than a predetermined current. The hydraulic power unit for a hydraulic elevator according to claim 1, wherein the rescue operation is performed. 5. The power transmission abnormality detecting device includes a tension detecting device for detecting a tension of the belt, and the control device is configured to control the car when the tension detected by the tension detecting device becomes smaller than a predetermined tension. The hydraulic power unit for a hydraulic elevator according to claim 1, wherein a rescue operation is performed. 6. The power transmission abnormality detection device includes a temperature detection device that detects a temperature of the electric motor pulley or the belt, and the control device determines that a temperature detected by the temperature detection device is higher than a predetermined temperature. The hydraulic power unit for a hydraulic elevator according to claim 1, wherein the rescue operation of the car is performed at the time. 7. The power transmission abnormality detecting device includes a sound collecting device that detects a friction sound between the electric motor pulley and the belt, and the control device determines that the friction sound detected by the sound collecting device is larger than a predetermined friction sound. The hydraulic power unit for a hydraulic elevator according to claim 1, wherein the car performs a rescue operation when the car is turned on. 8. The power transmission abnormality detection device includes an odor detection device that detects an odor of the belt, and the control device determines whether the odor detected by the odor detection device is greater than a predetermined odor. The hydraulic power unit for a hydraulic elevator according to claim 1, wherein a rescue operation is performed. 9. The power transmission abnormality detection device includes an oil speed detection device that detects an oil speed in a pipe that supplies oil from an oil tank to the hydraulic jack, and the control device includes the oil speed detection device. The hydraulic power unit of a hydraulic elevator according to claim 1, wherein the rescue operation of the car is performed when the detected oil speed of the car becomes higher than a predetermined oil speed.