JP4882659B2 - Multi car elevator - Google Patents

Description

  The present invention relates to a multi-car elevator that couples two hoistways to each other with a main rope and suspends each other's car from each other and moves in a circular manner in the hoistway. It is suitable for a device that appropriately corrects a level difference from the entrance / exit floor.

  Conventionally, in an elevator that uses two main cars connected by a main rope and suspends each other's cars to make a weight, when the two cars land on the floor, the respective car floors coincide with the entrance / exit floors. Has been adjusted. However, the landing position often shifts due to the extension of the main rope over time, the expansion / contraction of the main rope due to the car load, the extension / contraction of the main rope due to the passenger load fluctuation caused by the user getting on and off, and the like.

  Therefore, as a floor position correction device that corrects the landing position on one of the cars, a pantograph structure, an electric winch, a hydraulic jack, etc. are used. After the first car has landed, the car room is placed against the car frame. It is known to correct the landing deviation of the second car by raising and lowering, and is described in Patent Document 1, for example.

W02004-046007

  In the above prior art, it is essential that power is constantly supplied to the elevator car. In a multi-car elevator that circulates a plurality of cars in the hoistway, power is supplied by wire from the building side. This is more difficult than the supply lines get tangled in the hoistway.

  In addition, the trolley power feeding method used for railways, trams, etc. is not preferable because the apparatus becomes large and the hoistway must be enlarged, noise countermeasures, and periodic maintenance due to wear of contact parts are required.

  An object of the present invention is to provide a multi-car elevator that solves the above-described problems of the prior art, can reduce a user's waiting time, and is easy to get on and off without a floor step.

In order to achieve the above-mentioned object, the present invention comprises a car that is coupled to a hoistway provided in a building with a main rope in pairs, and the car moves in a single direction through the hoistway. The car elevator has a plurality of power transmission units installed on each stop floor of the hoistway, and a power reception unit provided on the car, and when the car reaches the stop floor, The power transmission unit and the power reception unit face each other, a power supply device that supplies power from the power transmission unit, a floor position correction device that is provided in the car and adjusts the floor height of the car, and A driving force storage device that is provided in the car or the floor position correction device and stores a driving force for driving the floor position correction device, and the driving force is stored by the supply of electric power, and the floor The position correction device It is driven by the driving force saving apparatus in the non-powered state before, in which the initial bed position correction.

  ADVANTAGE OF THE INVENTION According to this invention, a waiting time of a user can be shortened, there is no floor level difference, it is easy to get on and off, and a safe and low-cost multi-car elevator can be obtained.

  For multi-car elevators, the intermittent power supply method that supplies power from the building when the car lands is advantageous, but after the car lands on the target floor, the car reaches the main rope. If floor position correction is performed, a delay occurs in the door opening operation, and the waiting time of the user becomes longer, resulting in a decrease in transportation efficiency. Therefore, it is necessary to correct the car landing position before the car has landed on the destination floor, and it is necessary to secure a driving force for driving the floor position correcting device.

Hereinafter, a multicar elevator according to an embodiment will be described with reference to the drawings. FIG. 1 shows a perspective view of a multi-car elevator in which six passenger cars 1a to 3a and 1b to 3b move in a circulating manner in the hoistway 4. A pair of cars 1a and 1b are connected in a slidable manner by main ropes 9 and 10, and when one car 1a lands on the top floor, the other car 1b lands on the bottom floor. It is installed at the position to be. The main ropes 9 and 10 are in the car 1a,
The car 1 is fixed by using two main rope fastening portions 7a, 8a that are arranged at the front and rear of 1b and are attached to diagonal positions on the upper sides of the cars 1a, 1b.
The main rope 11 is driven by the drive motor 5a and the main rope drive pulley 6a, the main rope 12 is driven by the drive motor 5b and the main rope drive pulley 6b, and one set of cars 1a and 1b is moved by these two drive mechanisms. . In FIG. 1, each of the main ropes 9 and 10 is drawn with a single line, but in actuality, it is composed of main ropes, drive motors, and drive pulleys corresponding to the number of sets of the car (in this embodiment, 3 Composed of pairs). Therefore, the three sets of the cars 1a, 1b, 2a, 2b, 3a, 3b can be driven independently, and are circulated and moved clockwise by being guided by guide rails (not shown). However, it cannot overtake the preceding car.

FIG. 2 shows a front view of the multicar elevator. Only one set of cars 1a and 1b is shown. In addition, the entrance / exit of each stop floor is actually installed in front of each car, but the car 1a is illustrated on the left side and the car 1b is illustrated on the right side.
The AC power supplied from the commercial power supply 13 is converted into AC power of variable voltage / variable frequency by the power converter 14 and supplied to the drive motor 5a, and the drive motor is driven at a variable speed. Although not shown in the figure, the car includes various electric devices such as a car interior lighting, a floor indicator, and a car door driving device, and it is necessary to supply electric power.
A tail cord for supplying power is not connected to the car, and a power supply device 15 is provided instead. The power supply apparatus is installed separately in the power transmission unit 16 and the power reception unit 17, and power supply can be obtained without contact. The power transmission unit is provided on each stop floor in the hoistway (16a to 16f). The power receiving units 17a and 17b are installed in predetermined places of the cars 1a and 1b, for example, on the cars.
The car cages 1a and 1b are provided with floor position correction devices 21a and 21b for driving the car compartments 12a and 12b up and down relative to the car frames 11a and 11b. Floor position correction device 21a,
21b includes a pneumatic driving source 23a including driving mechanisms 21a and 22b, and the pneumatic driving source 23a,
It consists of the control apparatus which controls 23b. Drive mechanisms 21a and 22b are installed between the car floors 20a and 20b and the car frames 11a and 11b, and pneumatic drive sources 23a and 23b are installed under the car.
FIG. 3 shows the configuration of the power supply apparatus. The power transmission unit 27 includes a primary side winding 30 of a non-contact transformer, an inverter 27 that causes a switching operation at a high frequency to generate an electromagnetic induction effect, and a drive circuit 34 that drives the inverter. The power receiving unit 28 includes a secondary winding 31 of a non-contact transformer, a rectifier circuit 32, and a power storage 33 such as a battery or a capacitor for storing power. The power storage 33 provides power for electrical equipment such as car lighting, floor indicators, and car door drive devices.

The configuration of the car will be described in detail. Since the cars 1a and 1b have the same configuration, the car 1a will be described here. FIG. 4 shows a longitudinal sectional view of the car 1a.
The main rope 9 is fastened to the car frame via the main rope fastening portion 8b. The car frame 11 a includes an upper frame 37, a lower frame 41, and a vertical frame 39 that connects the upper frame 37 and the lower frame 41. The car floor 20a, the side plate 40, the top plate 38, and the door 46 are integrated to form the car 12a. Between the car floor 20a and the lower frame 41, in addition to the drive mechanism 22a of the floor position correction device 23, a floor movement amount detector 44a for detecting the movement amount of the car floor 20a, and a balance 43a for detecting the loaded weight, Guide members 24 and 25 for guiding the movement of the drive mechanism are installed.

A landing position detector 47 is installed on the top plate 38 and includes a shielding plate 35 attached to the hoistway wall and a position detection unit 36 on the top plate 38. The shielding board 35 is installed in the position corresponding to each floor landing. Specifically, the position detection unit 36 is set so that the heights of the landing floor 19a and the car floor 20a coincide with each other (δh≈0) when the position detection unit 36 comes to a position where the length of the shielding plate 35 is substantially equally divided.

  FIG. 5 shows a perspective view of the landing position detector. The landing position detector is composed of a photoelectric sensor provided with a light emitting part 42a and a light receiving part 42b at opposite positions of the U-shape. The shielding plate 35 passes between the light emitting part 42a and the light receiving part 42b, and the landing position is determined by blocking the light. Specifically, when the shielding plate 35 blocks the landing position detection unit 36 while the car is decelerating at a predetermined deceleration for landing, the remaining distance to the landing position (the length of the shielding plate 35) Correct the deceleration from 1/2) and land.

FIG. 6 shows an air pressure control circuit of the air pressure driving source 23a of the floor position correcting device 21a.
The pneumatic device includes a motor 54, a pneumatic pump 53 that is driven by the motor 54 to compress and send the air, and a pneumatic cylinder 51 that switches a line of the air sent from the pneumatic pump 53 via the check valve 58. When a pressure higher than a predetermined value is accumulated in an electromagnetic switching valve 52 to be sent to, an accumulator 59 for accumulating pressure for moving the pneumatic cylinder 51, and an accumulator 59 serving as a driving force accumulator, a pneumatic pump 53, the pressure switch 57 for setting the non-driving pressure range, and the pressure of the circuit is prevented from rising above a set value and held at the set pressure. The relief valve 55 is provided. The piston 50 built in the pneumatic cylinder 51 is connected to the car floor 20a, and the pneumatic device is controlled by the control device 48a.

Next, the car floor positioning operation will be described. Since the cars 1a and 1b shown in FIG. 2 operate in the same manner, the car 1a will be described. FIG. 7 shows a control flow chart of the car landing operation.
When the call button is pressed (S60), the control device determines an appropriate car and determines whether the accumulator pressure of the air pressure device of the car secures a predetermined pressure (S61). If the pressure is not secured, the pneumatic pump is driven by the motor in a state where power can be supplied, and the pressure is filled in the accumulator (S62). When the pressure reaches or exceeds the set pressure of the pressure switch, it is determined that the pressure is secured, and the drive of the pneumatic pump is stopped by the switching valve (S63).

  The driving device is driven so that the selected car goes to the calling floor (S64). At this time, the power supply from the landing side to the car is stopped, and the electric power consumed in the car is covered by the electric power stored in the power storage device until the next landing. On the other hand, the control device calculates the initial floor position correction amount of the floor 20a (S65). The calculation method will be described later.

While moving the car, that is, before the car is landed, the car 12a is moved by the initial floor position correction amount by the floor position correction device, and then the drive of the floor position correction device is stopped (S66).
When the landing position detector of the car 1a passes through the shielding plate (S67), the floor position correction amount is recalculated from the initial floor position correction amount and the deviation amount (S68).
The floor position correcting device is driven to perform the final correction of the car position (S69), and then the driving device is stopped to complete the landing (S70).
As described above, by providing a pressure accumulator in the pneumatic device, the floor position correction device can be driven even in a non-powered state before landing and a floor position correction operation can be performed.
When the car lands, the power transmission unit 16 and the car power reception unit 17 provided at the landing are in a position facing each other and the power supply is enabled.

Move to door opening operation. It is determined whether the pressure of the pressure accumulator secures a predetermined pressure (S71). When the pressure is not secured, the pneumatic pump is driven by the motor, and the pressure is filled in the accumulator (S72). When the pressure reaches the set pressure or higher, the driving of the pneumatic pump is stopped (S73). The door opening operation is started by the door driving device (S74).

Next, the case where the loading amount changes due to the user getting on and off and the floor position correcting operation occurs will be described with reference to FIG.
A load fluctuation amount δm and a predetermined correction amount δx for performing floor position correction are determined in advance. In the car 1a, the control device reads the value of the scale at a predetermined timing, and determines whether the load fluctuation is δm or more (S75). If it is determined that the load fluctuation has occurred by δm or more, the floor position is adjusted by moving the car 12a by the predetermined correction amount δx with the pneumatic device (S76).
The operations of S75 and S76 are repeated until the boarding / exit is completed. When the boarding / exiting is completed and the door closing operation is completed by the door driving device, the floor position correcting operation is completed (S77). Wait for a call command (return to S60).

Next, how to obtain the initial floor position correction amount when moving and landing from the current floor to the calling floor will be described.
The amount of main rope elongation is obtained by one formula.

x = mg / (E × S / L) (1 formula)
Where x is the length of the main rope (m), m is the mass carried by the main rope (kg) (cage mass + loading capacity), g is the acceleration of gravity (m / s ² ), and E is the longitudinal elasticity of the main rope. The coefficient (N / mm ² ), S is the main rope cross-sectional area (m ² ), and L is the main rope length (m) from the drive unit to the car fastening portion.
Since the main rope extension length varies depending on the length of the main rope, it must be taken into consideration when calculating the floor position correction amount. Basically, the main rope extension length change amount = the initial floor position correction amount. When moving from the current floor to the calling floor, the mass m does not change, so the floor position may be corrected in proportion to the change in the main rope length. Specifically, it becomes two types.
x1−x2 = g (m1 / L1−m1 / L2) / (E × S) (Expression 2)
Here, x1 is the current main rope extension length (m), x2 is the main rope extension length (m) at the calling floor, m1 is the current mass (kg), L1 is the current main rope extension length (m), L2 is the main rope length (m) at the calling floor.
Actually, since the main rope slips in the drive unit, it is necessary to add a correction amount by the sum δL of the slip amount and the amount of change over time of the main rope. Therefore, the floor position correction amount is X1−X2 + δL. It is the shielding plate and the landing position detector that confirms the presence or absence of the sum δL of the amount of slip and the main rope with time.

Next, another method for correcting the floor position when the loading amount changes due to the user getting on and off will be described.
FIG. 8 shows a floor position correction device unit and a landing position detector of a car provided with a floor position correction device. FIG. 8 (a) shows the state of the car 1a when it is landed.
The reference car floor height h0-1F relative to the car frame of the car 1a is stored in a control device (not shown).
FIG. 8B shows a case where the loading capacity of the car 1a is increased. The floor height that has sunk due to the increased loading capacity is defined as δh-1F. The floor may be lifted by this fluctuation height, and the floor height may be returned to the reference floor height h0-1F.
Using this floor movement amount detector can adjust the floor position more accurately than using a scale.

  As described above, since the floor position correction amount calculation at the time of landing and the floor position correction amount calculation at the time of getting on and off are respectively equipped with the floor position correction devices in the cars 1a and 1b, the loading amount between the cars 1a and 1b, etc. It is not necessary to exchange data, and it can be performed independently and control becomes easy.

In floor position correction control, when the pressure difference of the accumulator provided in the floor position correction device for both cars is compared, if the pressure difference is within the specified range, the floor position correction amount for both cars will be approximately equal. Determine the position.
Further, even when the pressure difference is within a predetermined range, if there is a predetermined distance or more to the destination floor, the floor position of the descending car may be preferentially landed so as to coincide with the landing floor. This is because, when the distance to the destination floor is a predetermined distance or more, the longer the main rope length, the larger the main rope elongation amount and the larger the correction amount.
Furthermore, when the pressure is lower than a predetermined value for some reason, or when one of the pressures is lower than the other, the floor position of the car on the lower pressure side is preferentially landed so that it matches the landing floor, Make sure that the floor position can be corrected with low pressure.

  Next, the case where the floor position correction is performed by moving only the car floor will be described. FIG. 9 shows a cross-sectional view of a car equipped with a floor position correcting device. The difference from the car shown in FIG. 4 is that the car floor 20 a is cut off from the side plate 40 and the top plate 38. Since the movable portion for correcting the floor position can be reduced in weight, there is an advantage that the pneumatic device can be made small. When only the car floor 20a is moved up and down, a gap is formed between the lower portion of the door 46 and the sill 45 as shown in FIG. 10, but a stretchable covering sheet 49 is provided at the lower portion of the door 46 inside the car. This prevents the gaps.

Next, the case where the floor position correcting device is provided only in one of the cars 1a will be described.
FIG. 11 shows a front view of the multi-car elevator when the floor position correction device is provided only in the car 1a. The car 1a is provided with a floor position correcting device having the configuration shown in FIG. One car 1b is provided with a scale 43b for measuring the load capacity under the car floor. The floor position correction of the car 1b is performed by moving the car frame together with the drive motor 5a and the main rope. Hereinafter, the car floor positioning operation of the present embodiment will be described.

FIG. 12 shows a control flow chart of the car landing operation.
Since the flow from the calling floor command (S79) to the floor position correction (S85) by the pneumatic device is the same as that shown in FIG. 7, the description is omitted. After correcting the position of the car floor of the car 1a, it is determined whether the landing position detectors in the cars 1a and 1b have passed through the shielding plate (S86, S87). When the car 1b not previously equipped with the floor position correcting device passes, the deceleration is adjusted by the driving device to correct the landing position (S88). Next, the floor correction amount exerted on the car 1a by correcting the landing position of the car 1b is recalculated (S90).

  When the car 1a passes through the shielding plate (S86), the amount of deviation when the car passes is further corrected to the re-correction amount obtained in S90, and the final correction amount is calculated (S94). Correction is performed (S95), and then the driving device is stopped to complete the landing (S96).

  On the other hand, when the car 1a passes through the shielding plate earlier than the car 1a in S86 (S87), the floor position correction amount of the car 1a is recalculated (S89), and the position of the shielding plate position of the car 1b is calculated. Wait for passage (S91). After passing the car 1b, the deceleration is adjusted by the driving device to correct the landing position (S93). Thereafter, the operations from (S94) to (S96) described above are performed and the landing is completed.

Next, the case where the loading amount changes due to the user getting on and off and the floor position correcting operation occurs will be described with reference to FIG.
After confirming the pressure of the pressure accumulator, the operation flow from the door opening operation (S97) to (S100) is the same as (S71) to (S74) shown in FIG.
After the door opening operation, the loading capacity of the cars 1a, 1b is measured with a scale to determine whether a predetermined load fluctuation has occurred (S101, S102). When the load of the car 1a has changed first, the car 1a is moved by a predetermined amount by the pneumatic device to adjust the floor position (S104).

When the load on the car 1b fluctuates, the main rope is moved up and down by the driving device to correct the floor height of the car 1b by a predetermined amount (S103). Since the floor position of the car 1a is shifted in conjunction with driving the driving device, the floor position of the car 1a is corrected by the pneumatic device.
The operation of S101 to S105 is repeated until the getting on / off is completed, and when the getting on / off is finished and the door closing operation is finished by the door driving device, the floor position correcting operation is finished (S106).

As can be understood from the above description, when floor position correction (landing correction) occurs in the car 1b that does not include the floor position correction device, the floor position of the car 1a also needs to be corrected in conjunction. However, only one floor position correction device is required, and the cost can be reduced.
In this embodiment, a pneumatic device is applied to the drive source of the floor position correction device. However, a hydraulic device may be used, and a hydraulic tank is required, but this is advantageous for downsizing.
Further, instead of the electric actuator that drives the car floor 20a directly with electric power, that is, without using air pressure, and the pressure accumulator 59 that is a driving force storage device, a storage battery that stores driving force for correcting the floor position. If the same floor position correction control is performed even in combination, the number of parts can be further reduced.

  As described above, the floor position correction can be performed before landing using the pressure of the pressure accumulator as a driving power storage device that has been stored in advance even when there is no power supply, so the waiting time of the user can be shortened, and It is easy to get on and off without a level difference, and can be safe and low-cost.

The multi-car elevator perspective view of one embodiment by the present invention. The side view which shows arrangement | positioning of two passenger cars in one Embodiment. The block diagram which shows the electric power supply apparatus in one Embodiment. The longitudinal cross-sectional view which shows the passenger car provided with the floor position correction apparatus in FIG. The perspective view which shows the landing position detector in one embodiment. The block diagram which shows the pneumatic circuit of the floor position correction apparatus in one embodiment. The control flowchart of the floor position correction | amendment operation | movement in one Embodiment. The side view explaining the floor position correction operation in one embodiment. The longitudinal cross-sectional view of the passenger car in one embodiment. The side view which expanded the car door lower part in one embodiment. The side view which shows the cage | basket | car arrangement | positioning in other embodiment. The floor position correction | amendment operation | movement control flowchart in other embodiment. The floor position correction | amendment operation | movement control flowchart at the time of the passenger | crew load fluctuation | variation in other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a-3a, 1b-3b Car 4 Hoistway 5a, 5b Drive motor 9,10 Main rope 15 Power supply device 16 Power transmission part 17 Power reception part 22a, 22b Drive mechanism 23a Pneumatic drive source 43a Scale 44a Floor movement amount detector 47 Landing position detector 51 Pneumatic cylinder 53 Pneumatic pump 59 Accumulator (driving force storage device)

Claims (7)

In a multi-car elevator comprising a car connected in pairs with a main rope to a hoistway provided in a building, the car circulating in the hoistway in one direction,
A plurality of power transmission units installed on each stop floor of the hoistway, and a power receiving unit provided on the car, and when the car reaches the stop floor, the power transmission unit and the A power supply device that is in a position facing the power reception unit and supplies power from the power transmission unit;
A floor position correction device that is provided in the car and adjusts the floor height of the car;
A driving force storage device that is provided in the car or the floor position correction device and stores a driving force for driving the floor position correction device;
And the floor position correction device is driven by the driving force storage device in a non-powered state before the car has landed, and the initial floor position correction is performed. Multi-car elevator characterized by being performed .   The multi-car elevator according to claim 1, wherein the floor position correction device is a pneumatic or hydraulic device, and a pressure accumulator is provided as the driving force storage device.   The multi-car elevator according to claim 1, wherein the floor position correcting device is an electric actuator that drives the floor of the car with electric power, and the driving force saving device is a storage battery. The thing of Claim 1 WHEREIN: It is judged whether the driving force for driving the said floor position correction apparatus is ensured, and when it is not ensured, the driving force of the said driving force storage apparatus is stored in the state which can supply electric power. Multi-car elevator characterized by that. In a multi-car elevator comprising a car connected in pairs with a main rope to a hoistway provided in a building, the car circulating in the hoistway in one direction,
A plurality of power transmission units installed on each stop floor of the hoistway, and a power receiving unit provided on the car, and when the car reaches the stop floor, the power transmission unit and the A power supply device that is in a position facing the power reception unit and supplies power from the power transmission unit;
A floor position correction device that is provided in the car and adjusts the floor height of the car;
A driving force storage device that is provided in the car or the floor position correction device and stores a driving force for driving the floor position correction device;
And the driving force is stored by the supply of electric power, each of the two passenger cars is provided with the driving force saving device and the floor position correction device, and secured in any one of the driving force saving devices. When the driving force is smaller than a predetermined value, a multi-car elevator characterized in that a car determined to be small is preferentially landed. 2. The vehicle according to claim 1, wherein each of the two passenger cars is provided with the driving force saving device and the floor position correcting device, and when there is a predetermined distance or more to the destination floor, A multi-car elevator characterized by preferential landing. In a multi-car elevator comprising a car connected in pairs with a main rope to a hoistway provided in a building, the car circulating in the hoistway in one direction,
A plurality of power transmission units installed on each stop floor of the hoistway, and a power receiving unit provided on the car, and when the car reaches the stop floor, the power transmission unit and the A power supply device that is in a position facing the power reception unit and supplies power from the power transmission unit;
A floor position correction device that is provided in the car and adjusts the floor height of the car;
A driving force storage device that is provided in the car or the floor position correction device and stores a driving force for driving the floor position correction device;
The driving force is stored by the supply of electric power, each of the two cars is provided with the driving force saving device and the floor position correction device, and the driving secured in one of the driving force saving devices A multi-car elevator characterized in that when the force is smaller than the other, the smaller car is preferentially landed.

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