JP3671704B2 - Guide roller protection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In particular, the present invention relates to a guide roller protection device for preventing a guide roller, which is provided outside a car of a hydraulic elevator and slides on a guide rail, from being pressed against the guide rail for a long time when the car is stopped to receive a load. is there.
[0002]
[Prior art]
FIG. 6 is a configuration diagram showing an outline of a conventional indirect hydraulic elevator. In the figure, 1 is a hydraulic cylinder that raises and lowers the plunger lot 2 by hydraulic pressure when the elevator car 5 is raised and lowered, 3 is a belt wheel that is rotatably coupled to the tip of the plunger lot 2, and 4 is arranged along the hoistway. A guide rail of the elevator car 5 provided, R is a guide roller provided at two upper and lower sides on both sides of the elevator car 5 with the guide rail 4 interposed therebetween, 6 is fixed to the floor surface of the pit, and the other end is a belt The main rope is fixed to the lower end of the elevator car 5 via the car 3, and the elevator car 5 is suspended from the belt car 3 by the main rope 6.
[0003]
FIG. 7 is a sectional view taken along line AA of the elevator car 5 shown in FIG. As is apparent from the figure, guide shoes 7 having a U-shaped cross section are fixed to both sides of the elevator car 5 so as to face the traveling direction of the elevator car, and the sliding surface S of the guide rail 4 is inserted into the groove M. Is done. Further, a notch (not shown) is formed in a part of the guide shoe 7, and the circumferential surface of the guide roller R contacts the guide rail 4 through the notch and rotates when the elevator car 5 moves up and down. Further, the guide roller R is rotatably attached to a guide roller mounting base 8 formed integrally with the guide shoe 7 as shown in FIG.
[0004]
Next, the operation of the conventional hydraulic elevator will be described. For example, when pressure oil is fed into the hydraulic cylinder 1, the plunger rod 2 rises, and the main rope 6 is lifted by the belt wheel 3 accordingly, so that the elevator car 5 coupled with the tip of the main rope 6 is also a guide rail. Ascend along 4.
[0005]
Since the elevator car 5 is slidably coupled to the guide rail 4 by the guide shoes 7 provided on both side surfaces, the elevator car 5 does not come off from the guide rail 4 and does not roll. Further, since both sides of the guide rail 4 are in contact with the guide roller R in the guide shoe 7, direct contact between the guide rail 4 and the guide shoe 7 can be avoided, and generation of abnormal noise and mechanical friction during ascent and descent are minimized. Can be suppressed.
[0006]
[Problems to be solved by the invention]
As described above, in the conventional indirect hydraulic elevator, the direct contact between the guide rail and the guide shoe was avoided to suppress abnormal noise and mechanical friction as much as possible. When the operation stops, as shown in FIG. 6, each guide roller is subjected to an offset load indicated by arrows L1 and L2 from the side surface of the guide rail, so that the guide roller may change and may not return to its original state. When the elevator car is moved up and down with the guide roller being deformed, there is a problem in that abnormal noise is generated or the elevator car vibrates abnormally and lowers the riding comfort.
[0007]
The present invention has been made to solve the above-described problems. When the elevator car is stopped, the guide roller is pressed against the guide rail by the eccentric load of the elevator car, and the deformation of the guide roller is prevented. It is an object of the present invention to obtain a guide roller protection device that can be used.
[0008]
[Means for Solving the Problems]
In view of the above object, the present invention provides an elevator car in the vicinity of a guide roller that is provided on a guide shoe fixed to the outside of an elevator car and that abuts the guide rail so that the guide shoe does not directly contact the guide rail. comprising a hydraulic contact releasing means capable of gradual operation to release the contact away the guide rail from the guide roller side during stop the guide roller presses from above the guide rails, the above hydraulic contact releasing means A hydraulic cylinder, a hydraulic plunger that is moved by the hydraulic cylinder and presses the guide rail, a movement detecting element that detects that the hydraulic plunger has moved to a predetermined position, and a check valve for maintaining the pressure of the hydraulic cylinder The hydraulic plunger by gradually increasing the pressure of the hydraulic cylinder After the contact, the movement detection element is monitored while moving to a predetermined position, and the operation is stopped by the check valve. A guide roller protection device comprising control means for controlling the hydraulic contact release means so as to maintain the pressure .
[0009]
Also the present invention is the guide roller protection device characterized by having a plunger head having elasticity the oil pressure plunger is in contact with the guide rail.
[0010]
Further, the present invention is a guide roller characterized by comprising control means for measuring the stop time of the elevator car and operating the hydraulic contact release means after a predetermined time sufficient for all passengers to get off the car. In the protective device.
[0012]
The present invention further includes an abnormal pressure detector for detecting the abnormal pressure by the hydraulic contact release means, and the control means stops the operation of the hydraulic contact release means when the abnormal pressure detector detects the abnormal pressure. In the guide roller protection device,
Further, the movement detecting element is a non-contact switch or a contact switch.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
1 and 2 are views showing a configuration of a guide roller protection device according to an embodiment of the present invention. FIG. 1 shows a state in which the guide roller R presses the guide rail 4, and FIG. The guide rail 4 is pressed and the guide roller R is separated (floated) from the guide rail 4. In the figure, the same or corresponding parts as those in the prior art are denoted by the same reference numerals and description thereof is omitted.
[0014]
Reference numeral 15 denotes a hydraulic plunger for pressing the guide rail 4 to separate the guide roller R from the guide rail 4. Reference numeral 14 denotes a hydraulic cylinder for moving the hydraulic plunger 15. Reference numerals 18, 19, and 20 denote hydraulic cylinders. An oil tank 18 that stores oil for moving 14, a pump 19 that pressurizes and depressurizes the hydraulic cylinder 14 with oil, and motors 20 and 16 that move the pump 19 are return springs for returning the hydraulic plunger 15 to its original position. . Since the oil tank 18, the pump 19 and the motor 20 are provided in the elevator car 5, all are small.
[0015]
21 is a hydraulic pipe to the hydraulic cylinder 14, 17 is a check valve which is provided in the hydraulic pipe 21 and shuts it off to maintain the pressure of the hydraulic cylinder 14, and 22 is a check valve made up of an electromagnetic valve, for example. When the pressure exceeds a predetermined value, it is determined that the pressure is abnormal, and an abnormal pressure detector such as a pressure gauge, 32 is a movement detecting element for detecting that the hydraulic plunger 15 has moved to a predetermined position, and 23 is these It is a control part which consists of a microcomputer which operate | moves according to the built-in program which comprehensively controls.
[0016]
FIG. 3 shows an enlarged view of the hydraulic cylinder 14 and the hydraulic plunger 15. In the figure, 15a is a plunger head formed of an elastic material such as rubber, 15b is a flange for pressing the return spring 16, 24 is a spring fixing frame, and 32 is after the hydraulic plunger 15 contacts the guide rail 4. It is the above-mentioned movement detection element 32 which comprises, for example, a non-contact or contacted switch that detects that it has moved to a predetermined position while pressing it. The abnormal pressure detector 22 is not used in this embodiment, but is used in an embodiment described later.
[0017]
FIG. 4A shows a flowchart of control in the control unit 23 according to this embodiment.
[0018]
Next, the operation will be described. If the elevator car 5 is currently in operation, the protection device does not operate according to the flowchart of FIG. 4A, and the hydraulic plunger 15 is not operated as shown in FIGS. The plunger head 15a and the guide rail 4 maintain a certain gap. After the stop command is issued to the elevator car 5 and stopped (step S10), it is sufficient time for all passengers to get out of the elevator car 5, for example, after confirming that there is no call after 60 seconds ( In steps S11 to S12), the hydraulic cylinder 14 is pressurized by operating the motor 20 and driving the pump 19 (step S13), and the guide rail 4 is pressed by the plunger head 15a having elasticity of the hydraulic plunger 15. As a result, the guide roller R is separated from the guide rail 4 (actually, the elevator car 5 side moves).
[0019]
The operation amount of the hydraulic plunger 15 is monitored by a signal from the movement detection element 32 so that the hydraulic plunger 15 operates by the gap between the guide shoe 7 and the guide rail 4 installed above and below the elevator car 5. When the motor moves to a predetermined position, it is limited by stopping the motor 20 (steps S14 to S15). Thereafter, the check valve 17 is turned on (closed) to hold the pressure of the hydraulic cylinder 14 (step S16), and the guide roller R is held away from the guide rail 4 (in a lifted state) (step S16). (See S17, FIG. 2).
[0020]
Further, when a call is generated while the guide roller R is lifted from the guide rail 4 (step S18), the hydraulic plunger 15 is moved by the spring force of the return spring 16 by turning off (opening) the check valve 17. Returned (drawn) (steps S19 to S20), the elevator car 5 can run in a state where the guide roller R is pressing the guide rail 4 (see FIG. 1) (step S21).
[0021]
By doing so, the eccentric load applied to the guide roller when the car is stopped can be removed by the hydraulic device (hydraulic contact releasing means). The hydraulic device can operate more slowly than an electrical device such as an electromagnetic valve, and does not hit the guide rail 4 too much when it is in contact with the guide rail 4. The impact sound at the time of contact can be reduced. Further, by making the plunger head 15a of the hydraulic plunger 15 of an elastic material, damage to the guide rail 4 and impact noise can be further suppressed. Further, in the control of the control unit 23, the hydraulic plunger 15 is driven after a sufficient time for all passengers to get out of the elevator car 5, so that the number of operations is minimized and passengers feel uncomfortable. Never give.
[0022]
Embodiment 2. FIG.
In another embodiment of the present invention, the hydraulic plunger is gradually brought into contact with the guide rail by further controlling the pressure of the hydraulic cylinder to be gradually increased. FIG. 5 (a) shows the time change of the pressure of the hydraulic cylinder 14 in this embodiment, and FIG. 5 (b) shows the time change of the moving distance of the hydraulic plunger 15 moved thereby. The other points are basically the same as those of the above embodiment.
[0023]
By controlling the pressure of the hydraulic cylinder 14 to gradually increase in this way, the hydraulic plunger 15 contacts the guide rail 4 at a low speed by proceeding at a low pressure until it contacts the guide rail 4, and damages the guide rail 4. Can be prevented. When the pressure of the hydraulic cylinder 14 is further increased after the contact, the hydraulic plunger 15 protrudes, and the offset load of the elevator car 5 is transferred from the guide roller R to the plunger head 15a of the hydraulic plunger 15, whereby the guide roller R is guided. When it is separated from the rail 4 and it is detected by the movement detecting element 32 that the hydraulic plunger 15 has reached a predetermined position, it stops. Note that the pressure of the hydraulic cylinder 14 may be monitored by a signal from an abnormal pressure detector 22 including a pressure detector described later, for example.
[0024]
Embodiment 3 FIG.
Further, in still another embodiment of the present invention, as shown in 22 of FIG. 1, by providing an abnormal pressure detector 22 composed of, for example, a pressure detector provided in the hydraulic pipe 21, the hydraulic cylinder 14 is operated at an abnormal pressure. By making the motor 20 stop when it becomes, it is made safer. In the case of this embodiment, the control unit 23 monitors the signal from the abnormal pressure detector 22 as shown in FIG. 4B together with the control shown in FIG. When the abnormal pressure is shown exceeding the predetermined value (step S22), the motor 20 is stopped (step S23). As a result, it is possible to prevent the pressure of the hydraulic cylinder 14 from rising abnormally and the hydraulic plunger 15 to operate vigorously and damage the guide rail 4 and the like, thereby improving safety.
[0025]
【The invention's effect】
As described above, according to the guide roller protection device of the present invention, the guide roller is separated from the guide rail by pressing the guide rail with the hydraulic plunger (hydraulic contact removing means) provided on the elevator car side when the car is stopped. As a result, the load on the guide roller is prevented from being applied to the guide roller, so the use of a hydraulic device makes it possible to operate more gently than electrical devices such as solenoid valves, and to contact the guide rail. Sometimes it does not hit the guide rails too much and damage them, and the impact noise when contacting the guide rails can be mitigated.
[0026]
In the present invention, the breakage of the guide rail and the impact sound can be further suppressed by using the plunger head of the hydraulic plunger as an elastic material.
[0027]
In the present invention, since the hydraulic plunger is driven after a sufficient time for all passengers to get out of the elevator car in the control of the control unit, the number of operations is minimized and passengers feel uncomfortable. Never give.
[0028]
Also, in this invention, by controlling the pressure of the hydraulic cylinder to gradually increase, the hydraulic plunger advances at a low pressure until it contacts the guide rail, thereby contacting the guide rail at a low speed and damaging the guide rail. Can be prevented.
[0029]
Further, according to the present invention, by providing an abnormal pressure detector in the hydraulic piping, the motor is stopped when the hydraulic cylinder becomes abnormal pressure, so that the safety is improved.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a state in which a guide roller of a guide roller protection device according to an embodiment of the present invention presses a guide rail.
2 is a configuration diagram illustrating a state in which a guide roller of the guide roller protection device of FIG. 1 is separated from a guide rail.
FIG. 3 is an enlarged view of a hydraulic cylinder and a hydraulic plunger portion of the apparatus of FIG. 1;
FIG. 4 is a flowchart showing a control operation of the guide roller protection device according to the present invention.
FIG. 5 is a graph for explaining the operation of the guide roller protection device according to another embodiment of the present invention.
FIG. 6 is a configuration diagram showing an outline of a conventional indirect hydraulic elevator.
7 is a cross-sectional view taken along line AA of the elevator car shown in FIG. 6. FIG. 8 is a detailed side view of the guide roller.
[Explanation of symbols]
4 guide rail, 5 elevator car, 7 guide shoe, 14 hydraulic cylinder, 15 hydraulic plunger, 15a plunger head, 15b collar, 16 return spring, 17 check valve, 18 oil tank, 19 pump, 20 motor, 21 Hydraulic piping, 22 abnormal pressure detector, 23 control unit, 24 spring fixed frame, 32 movement detection element, R guide roller.

Claims (5)

Provided on the guide shoe fixed outside the elevator car, close to the guide roller that abuts the guide rail and prevents the guide shoe from coming into direct contact with the guide rail, the guide roller from the guide roller side when the elevator car stops A hydraulic contact release means capable of a gentle operation of releasing the contact by pressing the rail and releasing the guide roller from the guide rail is provided. The hydraulic contact release means is moved by the hydraulic cylinder and the hydraulic cylinder. A hydraulic plunger for pressing the guide rail; a movement detecting element for detecting that the hydraulic plunger has moved to a predetermined position; and a check valve for maintaining the pressure of the hydraulic cylinder; Gradually raise the hydraulic plunger gently on the guide rail. After touching and touching, the hydraulic sensor is operated so that the movement detecting element is monitored while pressing the guide rail and stopped when it is moved to a predetermined position, and the state is maintained by the check valve. A guide roller protection device comprising control means for controlling the contact release means . The guide roller protection device according to claim 1, wherein the hydraulic plunger has a plunger head having elasticity to contact the guide rail.   The control means for operating the hydraulic contact release means after a predetermined time sufficient for all passengers to get off the car by measuring the stop time of the elevator car is provided. Guide roller protection device. The hydraulic contact release means further includes an abnormal pressure detector for detecting abnormal pressure, and the control means stops the operation of the hydraulic contact release means when the abnormal pressure detector detects abnormal pressure. The guide roller protection device according to any one of claims 1 to 3 . The guide roller protection device according to any one of claims 1 to 4, wherein the movement detection element comprises a non-contact switch or a contact switch.

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