JPH10279206A - Floor aligning device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform accurate floor aligning by locking one end part of a main cable in a main cable locking device capable of delivering/pulling-in the main cable and, if a difference occurs between a floor and a car floor, hoisting a car by delivering/pulling-in the main cable by the main cable locking device and then performing floor aligning. SOLUTION: A main cable locking device 51 locked in a hoistway 1 for locking one end part of a main cable 16 is constructed in such a manner that a screw bar is rotated forward/backward by a driving means so as to move a main cable locking plated threadedly engaged with this screw bar up and down and then the main cable end part is delivered/pulled in. The other end of this main cable 16 is fixed in a car 21, and by moving a guide plate 14 up and down via a hydraulic cylinder 12, a car 21 is hoisted. If a position difference between a floor 4 and a car floor exceeds a specified distance at this time, the driving means of the main cable locking device 51 is drive-controlled, the position difference is set within a specified distance by delivering or pulling in the end part of the main cable 16, and then the end part of the main cable 16 is returned to its middle location before the car lands at another target floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator floor matching device.

[0002]

2. Description of the Related Art There are two types of elevator operation: elevating up and down a long distance between floors, and elevating up and down a minute distance such as floor matching. As one method for efficiently performing such a drive in which the ascending and descending distances are significantly different, for example, there is a method described in Japanese Patent Application Laid-Open No. 58-177867. That is, FIG. 9 shows an outline of the publication disclosed in the publication. In the figure, 1 is a hoistway, 2 is a hoistway wall, 3 is a pit, 4 is a floor provided by an elevator, 5 is a landing door, 11 is a stand set up in the pit 3, and 12 is filled with pressurized oil. Cylinder 13, a plunger that advances and retreats according to the amount of pressure oil in the cylinder 12, 14 a deflecting wheel attached to the top of the plunger 13, 15 a plunger rail for guiding the plunger 14, 16 a deflecting wheel 14 is a main rope attached to the hoistway 1 at one end, 21 is a car to be placed on each floor 4, 22 is one end attached to a lower frame (not shown) of the car 21, and is mainly connected to the other end. A rope girder to which the other end of the cable 16 is attached, 23 is a car rail for guiding the car 21, 31 is a main cable locking plate to which one end of the main cable 16 is mounted, and 32 is a vertical movement of the main cable locking plate 31. Plunger for floor matching 3 floors combined cylinder filled pressure oil is erected downwardly, 34 bracket for fixing the floor combined cylinder 33, 41 is a cylinder 12
Reference numeral 42 denotes a floor-matching power unit that sends pressure oil to the floor-matching cylinder 33.

In the figure, a car 21 is supported by a main rope 16, and a main power unit 41 supplies pressure oil to a cylinder 1.
When the plunger 13 is injected or discharged into the plunger 2, the plunger 13 moves up and down and the car 21 moves up and down accordingly. Basket 21
Land on destination floor 4. Usually, the floor and the floor of the car 21 are stopped so as to be within a predetermined range. However, the floor of the car 21 may move up and down due to getting on and off the load, and the positional difference between the two floors may be out of the predetermined range. is there. In this case, pressure oil is injected into or discharged from the floor-matching cylinder 33 by the floor-matching power unit 42, and the end of the main rope 16 is pulled in or out, so that the car 21 is moved up and down a minute distance.
Is within a predetermined range.

[0004]

By the way, the above-mentioned conventional elevator floor-matching apparatus has a floor-matching cylinder 3.
3. It is composed of a plunger 32 for floor matching and a power unit 42 for floor matching, and the power unit 42 for floor matching naturally requires an oil tank (not shown). For this reason, there was a problem that the device became complicated.

[0005]

According to the present invention, there is provided a floor matching device for an elevator according to the present invention, in which the end portion of the main rope is normally retracted by a predetermined amount to an intermediate portion so as to be able to both extend and retract. The end of the main rope is locked, and when the position difference between the floor and the car floor exceeds a predetermined distance, the end of the main rope is extended or retracted so that the position difference is within the predetermined distance, and And a main rope locking device for returning the end of the main rope to the intermediate portion before the car arrives at another destination floor.

Further, in the elevator floor matching apparatus according to the present invention, the main rope locking device includes a screw rod screwed into a main rope locking plate to which an end of the main rope is locked. The main rope is extended or retracted by being moved by rotation.

Further, in the floor matching device for an elevator according to the present invention, the main rope is wound around a deflector mounted on the top of the plunger, and one end of the main rope is fixed in the hoistway. A hydraulic elevator for lifting and lowering the car by suspending the car at an end thereof, wherein the main rope locking device is a floor-matching cylinder connected to the cylinder by a communication pipe, and a part of the communication pipe. A floor-matching hydraulic pump for transferring the pressure oil between the cylinder and the floor-matching cylinder, and a floor-matching advancing / retreating with the transfer of the pressure oil from the top of the floor-matching cylinder And the main rope is locked at the one end of the main rope such that the pressure in the cylinder for floor matching and the pressure in the cylinder are different from each other. It is intended.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. An embodiment of the present invention will be described with reference to FIGS. The same reference numerals as those in FIG. 9 indicate the same or corresponding parts. First, in FIG. 1, reference numeral 51 denotes a main rope locking device in which one end of a main rope 16 fixed in the hoistway 1 is locked, and details thereof are shown in FIG. TP is a tape having holes formed at predetermined intervals, and is hung from the top of the hoistway 1 to the pit 3. PG is a position detector for detecting the position of the car 21 by counting the holes of the tape TP.

In FIG. 2, 52 and 53 are both threaded rods, each of which has a sprocket 54 attached to the lower end thereof and which are interconnected by a chain 55. Reference numeral 56 denotes a main rope locking plate in which a rope shackle 16a screwed to the threaded rods 52 and 53 and connected to an end of the main rope 16 penetrates and is locked via a spring 16b. Reference numeral 57 denotes an electric motor attached to the shaft end of the screw rod 52, which reversibly rotates the main rope locking plate 56 up and down to extend or retract the main rope end. LSD is a limit switch that operates when the main rope locking plate 56 reaches the maximum position where the main rope 16 can be extended, as indicated by reference numeral 56d in FIG. Code 56u for 2
As shown by, a limit switch that is activated when the maximum position at which the main rope 16 can be retracted is reached, LS
M is a limit switch that operates when the main rope locking plate 56 is located between the position of the maximum main rope feeding amount and the position of the maximum main indexing amount. The main rope locking plate 56 is previously stopped at the intermediate portion so that it can be moved equally to both sides.

[0010] Here, the limit switch LSM is indicated by a reference numeral 5 in FIG. 2 when the main rope locking plate 56 rises from below in FIG.
At the position indicated by 6m1, it engages with the side surface of the main rope locking plate 56 and operates. Conversely, when it descends from above in FIG.
It operates by engaging with the side surface of the main rope locking plate 56 at the position indicated by m2. That is, the operation start point of the limit switch LSM has a distance difference of δ depending on the moving direction of the main rope locking plate 56.
Therefore, assuming that the main rope locking plate 56 is stopped at the state shown in FIG.
+ Δ), and the pull-in amount is UL. Further, assuming that the main rope locking plate 56 is stopped in the state of 56 m2 in the figure, the maximum extension amount of the main rope 16 is DL, and the retracted amount is (UL +
δ).

FIG. 3 is a diagram showing the relationship between the position of the floor 4 and the position of the floor of the car 21. As shown in FIG. In the figure, the URL is the area where floor plunging can be performed by the plunger 13 in the ascending direction, and DRL.
Is a region where floor plunging can be performed by the plunger 13 in the descending direction. The floor can be floor-fed from a region exceeding the amount of pull-in and extension of the main rope 16 by the main rope locking device 51, respectively. LL is an allowable landing area set up and down from the position of the floor 4 respectively, and the floor matching operation is not performed when the car 21 has landed in this area. LLU
Is an upper limit position of the allowable landing area LL, and LLD is a lower limit position of the allowable landing area LL. FIG. 9A shows the case where the floor of the car 21 exactly matches the position of the floor 4.
The floor of the basket 21 is higher than the upper limit position LLU by a distance FDU, and this distance FDU is the extension amount DL of the main rope 16.
It shows the case where it is smaller than. FIG. 7C shows a case where the floor of the car 21 is lower than the lower limit position LLD by the distance FDD, and the distance FDD is smaller than the retracted amount UL of the main rope 16.

The floor matching operation will be described with reference to the flowcharts shown in FIGS. The following values are for the controller (not shown)
Is already input and stored. (1) The maximum extension amount DL and the retraction amount UL of the main rope 16 by the main rope locking device 51. (2) The allowable landing areas LL set respectively above and below the floor 4, and therefore, the allowable landing areas LL. Upper limit position LLU and lower limit position LLD (3) Floor matching possible area DRL by plunger 13 and floor matching possible area URL from lower (4) Floor positions FL starting from the lowest floor (5) Floor A predetermined time T defined as a time to complete the matching operation The predetermined time T is a time sufficient to normally end the floor matching, and the command is continued even after the predetermined time T has elapsed. In this case, it is determined that there is an abnormality.

FIGS. 4 and 5 are processed for each interrupt occurrence period Δt. FIG. 4 shows a floor matching process, and FIG. 5 shows a counting process of the floor matching command continuation time t. First, in FIG. 4, it is checked in step S11 whether the plunger 13 has stopped. If the car 21 is moving up and down by the plunger 13, the result is "N" and the process proceeds to step S14 without performing the floor matching operation. This is because the floor is adjusted while the plunger 13 is stopped. If stopped, the result is "Y", and it is checked in step S12 whether the position of the car 21 detected by the position detector PG is within the allowable landing area LL from the floor position FL.

As shown in FIG. 3A, the allowable landing area L
If it is within L, a command is issued to stop the main rope locking plate 56 in step S13. This is because there is no need for floor matching. In this case, the main rope locking plate 56 may remain stopped from the beginning, but an ascent / descent command has been issued in steps S17 and S22 to be described later, and as a result of this command, the allowable landing area LL is determined. This is because the command may need to be stopped in the latter case. In step S14, it is checked whether or not the car 21 has started up to the next destination floor. If it has not been activated, it is determined to be "N", and the main rope locking plate 56 keeps its state and ends. Basket 2
This is because the first floor is aligned with the floor position FL. If it has been activated, it is determined to be "Y" and the main rope locking plate 56 is moved to the intermediate position in step S15, that is, the main rope locking plate 56 is moved to the operating position of the limit switch LSM for floor matching at the next destination floor. And return to end. The processing is repeated from the beginning again at the next interrupt occurrence cycle Δt.

If it is determined in step S12 that the car 21 is not within the allowable landing area LL, car 2 is determined in step S16.
1 is a distance F from the upper limit position LLU of the allowable landing area LL.
It is checked whether the distance FDU is higher than the DU and the distance FDU is less than the extension amount DL of the main rope 16. As shown in FIG. 3B, if the amount is less than the feed amount DL, it is determined to be “Y”, and in step S17, a command is issued to raise the main rope locking plate 56. In step S18, it is checked whether the flooring command continuation time t after the first command is issued has passed a predetermined time T. If the time has not elapsed, the process ends with the command being continued. If the command continues even after the predetermined time T has elapsed, it is estimated that the main rope locking device 51 cannot handle any abnormal situation. Therefore, if the predetermined time T has elapsed, it is determined to be “Y”, and in step S19, the main rope locking plate 5
6 is stopped, and floor matching by the main rope locking device 51 is not performed. Instead, in step S20, a floor alignment by the plunger 13 is instructed, and the processing ends. Floor matching by the plunger 13 is a conventionally performed method, and a description thereof will be omitted.

The processing shown in FIG. 5 is performed for the floor-matching command continuation time t at each interrupt occurrence period Δt. That is, in step S31, it is checked whether a command to raise or lower the main rope locking plate 56 is issued. If no command has been issued, it is determined to be "N" and the flooring command continuation time t is initially set to "0" in step S32. If a command has been issued, it is determined to be "Y", and in step S33, an interrupt generation cycle Δt is added and the processing ends, and the next interrupt generation cycle Δ
The processing is repeated with the passage of t.

If the floor of the car 21 is lower than the lower limit position LLD of the allowable landing area LL, "N" is determined in step S16, and the process proceeds to step S21. In step S21, it is checked whether or not the distance FDD from the lower limit position LLD to the floor of the car 21 is less than the retracted amount UL of the main rope 16. FIG.
As shown in (c), when it is less than the retraction amount UL, it is determined to be “Y”, and a command is issued to lower the main rope locking plate 56 in step S22. If the flooring command continuation time t from when the lowering command is first issued does not exceed the predetermined time T, it is determined to be "N" in step S19, and the process ends with the lowering command being continued. If the flooring command continuation time t exceeds the predetermined time T, “Y” is determined in step S18, and the processing in steps S19 and S20 is performed as described above.

In step S21, when the distance FDD from the lower limit position LLD of the allowable landing area LL to the floor of the car 21 is equal to or greater than the pull-in amount UL, it is determined to be "N".
That is, considering the determination in step S16 together, the floor of the car 21 exceeds the extension amount DL of the main rope 16 from the upper limit position LLU of the allowable landing area LL, or the main rope 16 from the lower limit position LLD. Is exceeded. In this case, in step S23, the car 2 is placed in the floor matching area DRL or URL by the plunger 13.
It is determined whether there is one floor. Area D where flooring is possible
If it is within the RL or URL, it is determined to be "Y", and a floor matching command by the plunger 13 is issued in step S20 as described above. If it is out of the area in step S23, it is determined to be "N", and the process ends without issuing a floor matching command by the plunger 13. Therefore, the car 21 does not perform floor matching.

According to the first embodiment, the floor mating operation is mainly performed by the main rope locking device 51, and the floor mating operation is continued even if the floor mating operation exceeds the predetermined time T, which is normally considered to be completed. If the matching has not been completed, the switching to the floor matching by the plunger 13 is performed in steps S18, S19, and S20, so that a highly reliable floor matching can be performed.

In the first embodiment, the allowable landing area LL is the same for both the main rope locking device 51 and the plunger 13, but these are separately set and the In the case of using the jar 13, floor matching may be performed from a region where floor matching by the main rope locking device 51 is not possible to at least a region where floor matching by the main rope locking device 51 is possible. That is, the area from the floor position FL upward (LL + DL) or below (LL + UL) is the allowable landing area by the plunger 13, and then the main rope is locked to the allowable landing area LL above and below the floor position FL. The floor matching may be performed by the device 51.

Embodiment 2 FIG. In the first embodiment, a hydraulic jack including a cylinder 12 and a plunger 13 is used as a lifting device, and a main rope 16 is wound around a deflector 14 attached to the top of the plunger 13 to raise and lower the car 21. Although the description has been given of the case of the hydraulic elevator to be operated, the invention is not limited to this, and the invention can be similarly applied to a rope type elevator using a hoist as a lifting device.

Embodiment 3 FIG. Further, in the first embodiment, the main rope locking device 51 is used at one end of the main rope 16, but the main rope 16 may be used at the other end, or may be used at both ends. It is clear that it is good.

Embodiment 4 In FIG. 6, the floor-matching cylinder 61 is erected downward on the bracket 34,
The plunger 62 is moved back and forth. The main rope locking plate 31 is attached to the top of the plunger 62 for floor matching, and one end of the main rope 16 is further locked. It is necessary to use at least two main ropes 16 for safety reasons, and the figure shows an example thereof. Here, it is assumed that the sectional area S1 of the plunger 62 is equal to the sectional area S0 of the plunger 13. Accordingly, the pressure of the flooring cylinder 61 is one half of the pressure of the cylinder 12. The floor-matching cylinder 61 is connected to the cylinder 12 via a floor-matching power unit 70 and a communication pipe 71.
Is connected to That is, the pressure oil from the cylinder 12 is normally stopped by the check valve 73 and the solenoid valve 74 and does not flow into the floor matching cylinder 61.

Now, a case where the car 21 stops below the floor position FL and the car 21 is raised to perform floor matching will be described. The hydraulic oil from the cylinder 61 for floor matching is sent to the cylinder 12 by the hydraulic pump 72. in this case,
The floor-plunging plunger 71 is displaced by a distance commensurate with the pressure oil that has flowed out, and acts to lower the car 21 due to the dislocation. The cylinder 12 rises by the same distance due to the injected pressure oil. As a result, the car 21 rises twice as much as the plunger 13 rises. As a result, the car 2 is raised by the retreat distance of the plunger 62 for floor matching, that is, the rising distance of the main rope locking plate 31.

Conversely, when the car 21 stops above the floor position FL and the car 21 is lowered to perform floor matching, the solenoid valve 74 is opened. Since the pressure of the cylinder 12 is higher than the cylinder 61 for floor matching, the pressure oil is supplied to the pipe 71-.
It flows into the floor matching cylinder 61 via the solenoid valve 74-pipe 71. Due to this inflow, the plunger 13 descends,
The car 21 descends twice as far as the plunger 13. In addition, the plunger 62 for floor matching is a
6 acts in a direction to raise the car 21 by this amount. However, as described above, as a result, the car 21 is lowered by the advance distance of the plunger 61 for floor matching, that is, the descending distance of the main rope locking plate 31, so that floor matching can be performed. The mounting positions of the limit switches LSU, LSD and LSM are as follows.
Although they are different from those shown in FIG. 2, they have the same functions, and description thereof is omitted.

Embodiment 5 FIG. 7 shows that the cross-sectional area S2 of the plunger 62 for floor matching is the cross-sectional area S0 of the plunger 13.
However, the manner of locking the main rope 16 is changed. That is, the lower deflecting wheel 63 is attached to the end of the plunger 6 for floor matching, the upper deflecting wheel 64 is further erected on the bracket 34, and the main rope 16 is once wound around the lower deflecting wheel 63 to be raised, and the upper deflecting wheel is raised. It is wrapped around a car 64, turned over, and further wrapped around a lower deflecting wheel 63, and the end is attached to a bracket 34. The figure shows such a main rope 1
In order to clarify the winding of No. 6, the main rope 16 is shown floating on the lower deflector 63. Actually, the main rope 16 is wound around the lower deflector wheel 63 in close contact. In this configuration, the pressure of the floor matching cylinder 61 is twice the pressure of the cylinder 13. Therefore, the outflow from the floor matching cylinder 61 to the cylinder 12 is always prevented by the check valve 73 and the solenoid valve 74.

Now, the case where the car 21 stops below the floor 4 and the car 21 is raised to perform floor matching will be described. Pressure oil is sent from the cylinder 12 to the floor matching cylinder 61 by the hydraulic pump 72. The plunger 13 descends with the movement of the pressurized oil, and the plunger 61 for floor matching advances by a distance equal to the descending distance. The car 21 descends by a distance twice as long as the plunger 13 descends.
Double rise. Therefore, as a result, the car 21 is raised by a distance twice as long as the advance distance of the plunger 62 for floor matching, and floor matching is performed.

Conversely, a case in which the car 21 stops above the floor 4 and the car 21 is lowered to perform floor matching will be described. When the solenoid valve 74 is opened, the pressure oil flows into the cylinder 12 from the cylinder 61 for floor matching. Due to the movement of the pressure oil, the plunger 61 for floor matching retreats by a considerable distance, and the plunger 13 rises by a distance equal to the retreat distance of the plunger 61 for floor matching. Basket 21
Rises twice as far as the plunger 13 rises, but falls four times as long as the plunger 62 for floor matching has deviated. Accordingly, the car 21 is lowered as much as twice as long as the distance that the plunger 62 has been displaced, so that the car 21 is floor-matched. The parts corresponding to the limit switches LSU, LSD and LSM shown in FIG. 6 are not shown.

Embodiment 6 FIG. FIG. 8 shows that a deflecting wheel 63 is attached to the end of the plunger 62 for floor matching,
6 is wound half a turn, and has the same configuration as the plunger 13. The cross-sectional area S3 is configured to be smaller than the cross-sectional area S0 of the plunger 13. For this reason, the pressure of the cylinder 61 for floor matching is higher than the pressure of the cylinder 12. Also in this case, the same as in FIG. 7, in order to raise the car 21, when the pressure oil is sent into the floor-matching cylinder 61 by the hydraulic pump 72, the floor-matching plunger 62 advances, and the advance distance Is the plunger 13
(S0 / S3) times the descending distance of For this reason, when the descending distance of the plunger 13 is set to Lp, the car 21 rises by the distance represented by the following equation (1) and floor matching is performed. Moving distance of the car 21 = 2Lp × (S0 / S3) −2Lp (1) When lowering, the solenoid valve 74 is opened and the pressurized oil flows out from the floor matching cylinder 61 to the cylinder 12. Assuming that the plunger 13 has risen by Lp with this outflow, the car 21 will eventually fall by the distance represented by the above equation (1). The limit switch L shown in FIG.
The parts corresponding to SU, LSD and LSM are not shown.

In the embodiments disclosed in the fourth to sixth embodiments, the pressure of the cylinder 12 and the pressure of the flooring cylinder 61 are set to different values. In order to make the pressure oil flow in the higher direction and lower the pressure oil, the pressure oil may flow out from the higher pressure to the lower pressure. Various configurations other than those described in the fourth to sixth embodiments are conceivable.

According to the embodiments disclosed in the fourth to sixth embodiments, in any case, the power unit 70 for flooring is used.
Does not require an oil tank, and can have a simpler configuration than the conventional technology. In addition, the pressure difference between the cylinder 12 and the floor matching cylinder 61 only acts as a load on the hydraulic pump 72.

[0032]

As described above, the present invention has the following effects. According to the invention described in claim 1, in an elevator that raises and lowers a car with a lifting device via a main rope, one end of the main rope is connected to a main rope locking device that can extend or retract the main rope. Locking, when there is a difference between the floor and the car floor, the main rope is extended or retracted by the main rope locking device without using the lifting device, and the car is raised and lowered to perform floor matching. Since the lifting device returns one end of the main rope to an intermediate portion where it can be either extended or retracted before the car is landed on the next destination floor, it is locked. After landing on the destination floor, it is possible to perform floor matching without using the lifting device.

According to the second aspect of the present invention, the main rope locking plate on which the end of the main rope is locked is screwed into the screw rod,
The main rope is extended or retracted by being moved by the rotation of the screw rod, and an effect that floor matching can be performed accurately is achieved.

Further, according to the third aspect of the present invention, a hydraulic jack composed of a cylinder filled with pressure oil and a plunger which moves forward and backward from the top of the cylinder is used as a lifting device. In a hydraulic elevator in which a main rope is wound around an attached deflecting vehicle, one end of the main rope is fixed in the hoistway, and the other end is hung up and down by suspending the car, the main rope locking device is A cylinder for floor matching connected to the cylinder by a communication pipe,
A hydraulic pump and a solenoid valve for transferring the pressure oil between the cylinder and the cylinder for floor matching are provided in a part of the communication pipe, and the plunger for floor matching is moved forward and backward with the transfer of the pressure oil. And, at the one end of the main rope, the main rope is locked so that the pressure in the cylinder for floor matching and the pressure in the cylinder are different pressures, and the plunger for floor matching Is drawn out or pulled in with the advance and retreat of the vehicle, so that an effect that an oil tank dedicated to the cylinder for floor matching is not required is produced.

[Brief description of the drawings]

FIG. 1 is a hoistway sectional view showing an embodiment according to the present invention.

FIG. 2 is a front view showing a main part of the embodiment according to the present invention.

FIG. 3 is an explanatory diagram of an embodiment according to the present invention.

FIG. 4 is a flowchart showing the operation of the embodiment according to the present invention.

FIG. 5 is a flowchart showing the operation of the embodiment according to the present invention.

FIG. 6 is an explanatory diagram showing a main part of another embodiment according to the present invention.

FIG. 7 is an explanatory view showing a main part of another embodiment according to the present invention.

FIG. 8 is an explanatory diagram showing a main part of another embodiment according to the present invention.

FIG. 9 is a vertical sectional view of a hoistway using a conventional elevator floor matching device.

[Explanation of symbols]

1 hoistway, 2 hoistway walls, 3 pits, 4 floors, 5
Landing doors, 11 units, 12 cylinders, 13 plungers, 14 deflectors, 15 plunger rails, 16 main ropes, 16a rope shackles, 16b
Springs, 21 cages, 22 girder beams, 23 cage rails,
24 Main rope locking plate, 32 Plunger for floor matching, 33
Cylinder for floor matching, 34 bracket, 41 main power unit, 42 power unit for floor matching, 51
Main rope locking device, 52 screw rod, 53 screw rod, 54 sprocket, 55 chain, 56 main rope locking plate, 56d
Main rope locking plate, 56u Main rope locking plate, 56m1 Main rope locking plate, 6m2 Main rope locking plate, 57 Electric motor, 61 Floor matching cylinder, 62 Floor matching plunger, 63 Lower deflecting wheel, 64 Upper Deflection car, 70 Floor matching power unit, 71 communication pipe, 72 hydraulic pump, 73 check valve, 74 solenoid valve, 75 throttle valve, δ distance difference, DL feeding amount, UL drawing amount, LSD limit switch, LS
U limit switch, LSM limit switch, F
L Floor position, LL, Allowable landing area, LLU upper limit position, LLD lower limit position, DRL Floor matching area, UR
L Floor matching area, FDU distance, FDD distance, T
Predetermined time, t Floor alignment command duration, Δt Interrupt generation cycle, PG position detector, TP tape.

Claims (3)

[Claims] 1. An elevator for raising and lowering a car by a lifting device via a main rope, wherein at least one end of both ends of the main rope is locked, and the end is movable by a predetermined distance. It is always locked at the intermediate part of the predetermined distance,
After the car has been lifted and lowered by the lifting device and landed on the destination floor, when the position difference between the floor and the car floor exceeds a predetermined range, the car moves from the intermediate portion and extends or retracts the main rope. By raising and lowering the car, the position difference is kept within the predetermined range, and the car is returned by the lifting device and returned to the floor at another destination, and is returned to the end of the main rope. A floor matching device for an elevator using a main rope locking device that locks again at the intermediate portion. 2. A main rope locking device comprising: a screw rod; and a main screw which is screwed into the screw rod, an end of the main rope is locked, and is moved by rotation of the screw rod to draw out or pull in the main rope. 2. A cable locking plate comprising:
2. The floor matching device for an elevator according to item 1. 3. A lifting device, wherein a cylinder into which pressure oil is injected or discharged is erected in a hoistway, and a plunger is advanced and retracted from the top of the cylinder with the injection or discharge of the pressure oil. A main rope is wrapped around a deflector mounted on the top of the plunger, one end of the main rope is fixed in the hoistway, and the other end of the main rope is hung up and down for lifting. The rope locking device is a floor-matching cylinder connected to the cylinder by a communication pipe, and is provided on a part of the communication pipe to transfer the pressure oil between the cylinder and the floor-matching cylinder. A hydraulic pump and a floor plunger that advances and retreats with the transfer of the pressurized oil from the top of the floor matching cylinder, and at one end, the main rope has a pressure within the floor matching cylinder. In the above cylinder 2. The floor matching device according to claim 1, wherein the locking device is locked in such a manner that the pressure of the floor is different from the pressure, and is extended or retracted as the plunger moves. .