CN103241611A - Speed detection device, elevator apparatus with same, and checking method of elevator apparatus - Google Patents

Abstract

When detecting the operation of the emergency braking device of elevator equipment, it is necessary to set the limit value of the critical speed to be greater than the rated speed, and to reproduce a speed that is 1.4 times the rated speed at the maximum. In actual installed elevator equipment, it is difficult to reproduce the abnormal state by moving the elevator car at the above-mentioned high speed. The speed-increasing mechanism is installed on the speed-detecting device, and the speed-up of the elevator car is detected during the inspection operation, so that the dangerous speed can be reproduced in the actual installed elevator equipment in a simulated way, and the speed can be conveniently Check the speed detection device of the elevator equipment, and can complete the inspection in a short time.

Description

Speed detection device, elevator equipment with the speed detection device, and inspection method for elevator equipment

technical field

The present invention relates to an elevator equipment and an inspection method for the elevator equipment, in particular to a speed detection device installed on the elevator car and an elevator that can use the speed detection device to conveniently inspect the abnormal response device of the elevator car Equipment and inspection methods for the elevator equipment. the

Background technique

Generally speaking, the elevator equipment is equipped with an abnormal response device (such as an emergency braking device and a braking mechanism of a hoist, etc.) used when the elevator car is raised or lowered at an abnormal speed. The emergency braking device is taken as an example for description below. In order to operate the emergency braking device, it is necessary to provide a speed detection device for measuring the descending speed of the elevator car, and the speed detection device is usually installed on the roof portion outside the elevator car. the

As a specific speed detection device, a car speed detection device is disclosed in Japanese Patent Application Laid-Open No. 2011-140361 (Patent Document 1). The rotation speed of the elevator car is detected by the rotation of the roller shaft of the roller that is in contact with and rotates in the guide rail laying direction. the

In addition, International Publication No. WO2007/063574 (Patent Document 2) discloses an operating device that detects the moving speed of the elevator car through a speed detection device using rollers installed on the elevator car. When the elevator car of the elevator equipment runs abnormally and cannot be controlled, braking devices such as brakes and emergency braking devices are activated. the

Prior Art Literature

Patent Documents

Patent Document 1 Japanese Patent Application Laid-Open No. 2011-140361

Patent Document 2 International Publication WO2007/063574 Publication

Contents of the invention

In elevator equipment, when newly installing elevator equipment or performing maintenance, it is necessary to check abnormality response devices such as emergency braking devices installed on elevator equipment to confirm whether they can operate normally at a predetermined speed. the

However, in the actual installed elevator equipment, the inspection method of accelerating the speed of the elevator car to an abnormal speed or a dangerous speed (hereinafter referred to as "dangerous speed") to check the operation of the speed detection device has not yet been established. the

As one method, the method of actually moving the elevator car at high speed for checking has been proposed by Europe and the like. However, for example, when checking the operation of an emergency braking device, which is one of the abnormality response devices of elevator equipment, it is necessary to set the limit value of the critical speed to be greater than the rated speed, and to reproduce the maximum speed at the rated speed. 1.4 times faster. In the elevator installations that have been actually installed, it is difficult to reproduce the abnormal state by moving the elevator car at the above-mentioned high speed. the

In addition, as another method, an inspection method has been disclosed in which the speed detector, that is, the speed governor for measuring the speed of the elevator car, is removed from the elevator car and installed in a place other than the elevator car. Therefore, the simulation method increases the speed of the governor unit to a dangerous speed to reproduce the abnormal state. However, this method is unrealistic since it takes a lot of time not only for disassembling and assembling the governor, but also takes a longer time for inspection. the

The purpose of the present invention is to provide an elevator equipment and an inspection method for the elevator equipment, so that the abnormality response device of the elevator car can be inspected conveniently in the actually installed elevator equipment, and the inspection can be completed in a short time. the

solution

The present invention is characterized in that the speed detecting device has: a rotating body that rotates in contact with the guide rail; a rotating speed detecting unit that detects the rotating speed of the rotating body; and a rotation transmission shaft that can selectively change the rotating body and the rotating speed The detection unit is in the transmission state and the non-transmission state; and the speed-up mechanism can selectively make the rotating body and the rotation speed detection unit in the transmission state and the non-transmission state, and increase the speed of the rotation of the rotating body and transmit it to the rotation speed detection unit,

When the elevator car is in normal operation, the speed-increasing mechanism is in the non-transmission state, and the rotation of the rotating body is transmitted to the rotation speed detection unit through the rotation transmission shaft. In the non-transmission state, the rotation speed of the rotating body is increased by the speed-increasing mechanism and then transmitted to the rotation speed detection unit. the

Invention effect

According to the present invention, since a speed-increasing mechanism is provided on the speed detection device, and the moving speed of the elevator car is speeded up for detection during the inspection operation, it can be conveniently simulated in the actually installed elevator equipment. The critical speed can be reproduced, and the operation state of the abnormality response device installed in the elevator equipment can be checked conveniently, and the check can be completed in a short time. the

Description of drawings

Fig. 1 is a perspective view showing a schematic configuration of a speed detection device used in elevator equipment according to an embodiment of the present invention. the

Fig. 2 is a side view of a speed governor, which is a speed detector included in the elevator equipment according to the embodiment of the present invention, during normal operation. the

Fig. 3 is a side view of a speed governor, which is a speed detector included in the elevator equipment according to an embodiment of the present invention, during inspection operation. the

Fig. 4 is an explanatory view showing a state when an inspector inspects a speed governor, which is a speed detection device included in the elevator equipment according to the embodiment of the present invention. the

FIG. 5 is a schematic diagram showing a screen of an inspection terminal when an inspector succeeds in inspecting a speed governor that is a speed detection device. the

FIG. 6 is a schematic diagram showing a screen of an inspection terminal when inspection fails when an inspector inspects a speed governor, which is a speed detection device. the

Detailed ways

Hereinafter, a speed detection device according to an embodiment of the present invention will be described in detail with reference to the drawings. 1 to 3 show an outline of a speed governor that is a speed detection device according to an embodiment of the present invention. The speed governor is taken as an example to illustrate below. the

The structure of the governor 1 installed on the ceiling of the elevator car 2 is as follows. Specifically, the governor 1 has a roller 4 as a rotating body and an encoder 5 as a rotation speed detection unit, and the roller 4 rotates in contact with a guide rail 3 that guides the elevator car 2 that constitutes the elevator equipment to ascend and descend in the ascending and descending direction. , the encoder 5 is used to detect the rotation direction and rotational speed of the roller 4 . the

The roller 4 is fixed to the main shaft 6A, and the main shaft 6A is rotatably pivotally supported on the base 7 . The base 7 is fixedly mounted on the ceiling portion of the elevator car 2 . Therefore, the position of the base 7 does not change. A first transmission gear 11A is fixed to the main shaft 6A, and the first transmission gear 11A rotates integrally with the main shaft 6A. In addition, the main shaft 6A penetrates the slide table 8 . the

On the other hand, the main shaft 6B is rotatably pivotally supported on the slide table 8 and is provided to move together with the slide table 8 . The encoder 5 is fixedly mounted on the slide table 8 . Therefore, a rotation detecting portion such as an MR element mounted on the front end of the main shaft 6B rotates in the encoder 5 and sends a rotation signal to the control device 17 . A second transmission gear 11B is fixed to the main shaft 6B, and the second transmission gear 11B moves together with the main shaft 6B. The number of teeth of the second transmission gear 11B is set to be smaller than the number of teeth of the first transmission gear 11A. the

The main shaft 6A and the main shaft 6B constitute a rotation transmission shaft, and the rotation is transmitted or not transmitted (blocked) by the clutch mechanism 15 . the

The slide table 8 is movable relative to the base 7 as will be described later, and by this movement, it is possible to selectively switch between the state of detecting the rotation of the roller 4 during normal operation and the state of detecting the rotation of the roller 4 during the inspection operation. state. Members attached to this slide table 8 constitute a speed-up mechanism that is a part of the characteristics of the present invention. Specifically, by increasing the speed of the rotation of the rollers 4, the state in which the elevator car 2 moves at high speed is simulated. the

An intermediate shaft 9 penetrating through the slide table 8 is pivotally supported on the base 7 , and an intermediate gear 16 is rotatably attached to a part of the intermediate shaft 9 . The purpose of providing the intermediate gear 16 is to align the rotation directions of the main shaft 6A and the main shaft 6B during the inspection operation. In this embodiment, the position of the intermediate gear 16 does not change. the

A coil spring 10 having a function of returning the position of the slide table 8 to a normal position is provided between the base 7 and the slide table 8 . The normal position refers to a position where the speed of the elevator car 2 can be detected in a normal running state. Therefore, except when the operator slides the slide table 8 for inspection, the slide table 8 can be used as a mounting device that restricts the operation of the speed-up mechanism. the

Further, on the slide table 8 is pivotally supported a speed-up shaft 12 on which a first speed-up gear 13A and a second speed-up gear 13B are mounted. The number of teeth of the first speed-up gear 13A is set to be larger than the number of teeth of the second speed-up gear 13B. the

Therefore, during the normal operation, the speed-up mechanism is switched to non-operation, and during the inspection operation, the speed-up mechanism is switched to operation. Specifically, the rotation of the roller 4 is accelerated from the first transmission gear 11A through the first speed-up gear 13A, the second speed-up gear 13B, the intermediate gear 16, and the second transmission gear 11B. Here, since the rotation direction of the first transmission gear 11A becomes the opposite direction in the first speed-up gear 13A and the second speed-up gear 13B, the rotation direction is changed again by the intermediate gear 16, thereby making the first transmission gear 11A It is consistent with the rotation direction of the second transmission gear 11B. the

Here, the slide table 8 is configured to be movable only in the axial direction of each shaft with respect to the base 7 , but it may also be provided so as to slide in a direction perpendicular to the main shaft 6 , and may also be provided so as to move relative to the main shaft 6 . axis to rotate. In addition, an inspection position detection switch 14 is provided on the base 7, and after the inspection position detection switch 14 detects that the slide table 8 has moved to the inspection state position, sends a signal to the control device 17 to start the inspection. the

Information such as the rotational direction and rotational speed measured by the encoder 5 is sent to the control device 17, and is converted into the moving direction and speed of the elevator car 2 by the control device 17. A predetermined critical speed is preset in the control device 17. When the speed of the elevator car 2 exceeds the critical speed, the control device 17 activates the braking device 18 to reduce the descending speed of the elevator car 2, and the elevator The device stops working. the

The braking device 18 is, for example, a device that brakes the movement of the elevator car 2 such as a braking mechanism of a hoisting machine and an emergency braking device, and the critical speed is determined according to the moving direction of the elevator car 2 and the type of the braking device 18 . For example, when the brake device 18 is an emergency brake device, the critical speed is 1.4 times or less than the rated speed. A plurality of brake devices 18 may be installed according to the type and scale of the elevator equipment, and a plurality of types of critical speeds may be set. the

The operation of the governor 1 during normal operation will be described below. The state of the governor 1 during normal operation is shown in FIG. 2 . the

During normal operation, the slide table 8 is pressed toward the roller 4 side by the return coil spring 10, and the clutch 15 is in the connected state. Therefore, when the elevator car 2 moves in the ascending or descending direction, the rotation of the roller 4 contacting the guide rail 3 is transmitted to the main shaft 6A, the clutch 15 and the main shaft 6B, and the rotation speed of the roller 4 is directly measured by the encoder 5 (It indirectly represents the moving speed of the elevator car 2). The direction of movement and the velocity of movement of the elevator car 2 are thus transmitted to the control device 17 . the

At this time, the respective installation positions of the intermediate gear 16 , the first speed-up gear 13A, and the second speed-up gear 13B are set so as not to mesh with any one of the first transmission gear 11A and the second transmission gear 11B. the

Next, the state of the governor 1 during the inspection operation will be described with reference to FIG. 3 . During the inspection operation, as shown in Figure 3, the operator overcomes the elastic force of the coil spring 10 and slides the sliding table 8 of the governor 1 to the right side of Figure 3, so that the first speed-up gear 13A and the first transmission gear 11A are meshed , and mesh the second speed-up gear 13B and the intermediate gear 16 with the second transmission gear 11B. the

At this time, the state of the connection between the main shaft 6A and the main shaft 6B via the clutch 15 is cut off, and the rotation of the main shaft 6A is not directly transmitted to the main shaft 6B, but through the first transmission gear 11A, the first speed-up gear 13A, the second speed-up gear 13B, the intermediate gear 16 and the second transmission gear 11B increase the speed of the main shaft 6A and transmit it to the main shaft 6B. the

Here, the respective numbers of teeth of the intermediate gear 16 , the speed-up gears 13A, 13B, and the transmission gears 11A, 11B are set in advance so as to constitute arbitrary gear ratios. For example, when the brake device 18 that needs to be inspected is an emergency brake device, the speed during the inspection operation of the elevator car 2, that is, the inspection speed, can be increased according to the corresponding gear ratio, thereby obtaining a speed of more than 1.4 times the rated speed. . the

For inspection, the installation positions of the respective gears are set so that the respective gears mesh with each other after the slide table 8 is moved to the right. the

Therefore, in the state where the intermediate gear 16, the speed-up gears 13A, 13B, and the transmission gears 11A, 11B are engaged with each other, when the elevator car 2 moves in the ascending direction or descending direction, the force of the roller 4 abutting the guide rail 3 The rotation is accelerated according to the gear ratio and transmitted to the main shaft 6B. As a result, the increased moving speed of the elevator car 2 can be detected by the encoder 5 . the

Thereby, only by moving the elevator car 2 at a predetermined inspection speed, it is possible to simulate the state when the elevator car 2 moves at a critical speed that is 1.4 times or more the rated speed. the

In addition, after the slide table 8 is moved to the right side in FIG. 3 , the return coil spring 15 is compressed to generate a force to press the slide table 8 toward the original position, that is, the position where the clutch 15 is engaged. An unillustrated fixing portion for fixing the slide table 8 during inspection is provided so as to hold the slide table 8 at this position. In addition, whether or not the slide table 8 is in a position where the clutch 15 is disengaged is detected by checking the position detection switch 14 . the

As the clutch 15, in addition to the meshing clutch shown in the figure, a clutch that transmits rotation by frictional force may be used, or a structure in which the clutch 15 is fixed by a fixing pin or the like can be used to avoid errors during operation. ground to disconnect the transfer of rotation. the

In addition, it is of course also possible to use a speed-up mechanism that can speed up and transmit the rotation speed, which is composed of a pulley and a transmission belt or a gear and a chain, instead of the intermediate gear 16, the speed-up gear 13A, 13B and the transmission gear 11A, 11B. A speed-up mechanism that adopts a gear set is formed. the

The coil spring 10 for return only needs to have the function of returning the slide table 8 to the position during normal operation, and a spring member other than the coil spring 10 shown in this embodiment may be used, and its installation location is not limited. In addition, the return coil spring 10 may have a function of returning the slide table to the position during the inspection operation. At this time, it is necessary to provide a fixed part in parallel to prevent the slide table 8 from sliding during operation. the

Even if the roller 4 and the encoder 5 are not arranged coaxially as shown in FIG. 1 , the clutch 15 can be provided to transmit the rotation of the roller 4 to the encoder 5 to obtain the same effect. the

In addition, a switch having a mechanical contact or an optical switch is used as the inspection position detection switch 14, and redundancy can be improved by providing a plurality of inspection position detection switches 14 to form a multiplex. In addition, it is also possible to detect whether or not the clutch 15 is in the disengaged state by attaching the inspection position detection switch 14 to the clutch 15 . In short, as described above, the present invention can adopt various modified examples. the

Hereinafter, referring to FIG. 4 , the situation at the time of elevator equipment inspection will be described. The operator moves to the ceiling outside the elevator car 2 and connects the terminal 19 for inspection to the control device 17 when performing the inspection. the

The inspection terminal 19 can display (1) the moving direction and the moving speed of the elevator car 2 obtained from the encoder 5 of the speed governor 1, (2) the moving direction and the moving speed of the elevator car 2 obtained from other speed detection devices such as hoisting machines. The direction of movement and the speed of movement and (3) the ratio of these speeds. In addition, various parameters indicating the operation status of the elevator equipment can also be displayed as needed. the

In addition, it can also display the position of the elevator car 2, whether the control device 17 has issued an instruction to the brake device 18 to start braking, check the detection situation of the position detection switch 14, the action of the brake device 18, whether the elevator equipment is in the The state of being able to operate, etc. In addition, the elevator car 2 may be operated at an inspection speed lower than the normal operation speed through the inspection terminal 19 . the

The inspection method is roughly as follows. First, the inspection terminal 19 is connected to the control device 17, and the operation mode is switched to the inspection operation mode. In addition, the inspection terminal 19 may be connected to the control device 17 so that the operation mode can be automatically switched to the operation mode for inspection. the

Confirm the display of the terminal 19 for inspection to confirm the operation status of the brake device 18 and whether the elevator equipment is in a state where it can be operated. At this time, confirm the difference between the running direction and speed of the elevator car 2 measured by the governor 1 and the running direction and speed of the elevator car 2 measured by other speed detection devices displayed on the terminal 19 for inspection. Whether the difference is within the specified range. the

Next, the operator slides the slide table 8 of the speed governor 1 to the inspection position. At this time, it is checked visually whether the clutch 15 is completely disengaged, and whether the intermediate gear 16, each speed-up gear 13A, 13B, and each transmission gear 11A, 11B are completely meshed. Simultaneously, the detection result of the inspection position detection switch 14 is confirmed by the inspection terminal 19 to confirm whether the slide table 8 is located at the inspection position. the

The operator maintains the slide table 8 at the inspection position (for example, the operator keeps the state after moving the slide table 8 to the right side of the figure by hand), operates the inspection terminal 19, and makes the elevator car 2 move at the inspection speed. up or down. In addition, the governor 1 may have a function of fixing the slide table 8 at the inspection position. Thus, as described above, by moving the elevator car 2 at the inspection speed, it is possible to simulate the state when the elevator car 2 moves at a speed that is 1.4 times or more the rated speed. the

When the control device 17 determines that the moving direction and the moving speed of the elevator car 2 detected by the encoder 5 exceed the critical speed, the control device 17 outputs a signal for actuating the braking device 18 . When the control device 17 outputs a signal for operating each braking device 18, the inspection terminal 19 records and displays the speed of the elevator car 2 at that time. the

At this time, if there is no problem with the safety of the worker, the control device 17 may output a signal to actuate the braking device 18 to be inspected, or may not actuate the braking device 18 to be inspected. In addition, when there are a plurality of braking devices 18 , the same setting may be performed for the braking devices 18 not to be inspected. the

A display example of the inspection terminal 19 will be described below. 5 shows the display screen of the inspection terminal 19 when the inspection is successful, and FIG. 6 shows the display screen of the inspection terminal 19 when the inspection fails. The brake device 18 is here an emergency brake device. the

In the figure, when there are multiple critical speeds and multiple braking devices 18, multiple identical results can be displayed, and multiple results can also be displayed overlappingly. In this embodiment, one braking device 18 is shown. occasions. The governor speed line 20 represents the speed of the elevator car 2 as measured by the governor 1 . The operation signal line 21 represents a signal output by the control device 17 to operate the brake device 18 , and when the operation signal line 21 is at a low level, it is considered that the control device 17 has output a signal to operate the brake device 18 . the

As shown in FIG. 5 , when the action signal line 21 becomes low level, the braking device 18 acts, and the speed of the elevator car 2 measured by the governor 1 is displayed on the action speedometer 22 . At this time, since the speed-up is performed by the speed-up device, the actual moving speed of the elevator car 2 is calculated from the speed-up ratio and displayed on the motion speedometer 22 . the

Therefore, although the actual speed of the elevator car 2 is 57.4m/min, since the speed is increased by the speed-increasing mechanism to a critical speed of 84±2m/min and then sent to the encoder 5, the control device 17 judges that the speed of the elevator car is 57.4m/min. The car 2 is running at a critical speed and sends a braking signal to the braking device 18 . In this way, the movement of the elevator car 2 can be simulated at a critical speed. the

The operator records this value, compares it with the value of the dangerous speed meter 23 displayed near the value, and records the value of the dangerous speed meter 23 after confirming that it is within the range of the allowable value. In addition, after the speed of the elevator car 2 is increased to exceed the critical speed, whether or not the brake device 18 operates is confirmed and recorded by checking the indication of the brake lamp 24 . After the operator confirms that the action signal line has become a low level through the terminal 19 for inspection, the operator confirms that the brake device 18 operates through the brake indicator lamp 24 to stop the elevator car 2. Check the speed of running jobs. Save the above records as inspection history. the

FIG. 6 shows a display screen of the inspection terminal 19 when the inspection fails, and the brake device 18 is an emergency brake device as in FIG. 5 . As shown in Figure 6, after the governor speed line 20 exceeds 1.4 times of the rated speed, if the action signal line 21 still does not become low level, the operator ends the process of making the elevator car 2 run at the inspection speed. Operation, and confirm whether the connection between the encoder 5 and the control device 17 and between the control device 17 and the terminal 19 for inspection is normal. Thereafter, the place where the malfunction is suspected is confirmed and repaired, and then checked again, thereby repairing and maintaining the abnormality countermeasure device of the elevator car. the

As mentioned above, according to the speed governor 1 of the present invention, it is possible to conveniently check the operating state of the abnormal response device of the elevator equipment, specifically, it is possible to conveniently check whether the speed measurement of the elevator car 2 is normal. When the speed of the elevator car 2 exceeds the predetermined critical speed, whether the control device 17 has issued an instruction to start braking to each braking device 18, and whether the control device 17 has sent an instruction to start braking to each braking device 18 In the case of an instruction, whether the elevator car 2 has stopped running under the braking of the braking device 18, etc., and also has the effect of being able to complete the inspection in a short time. the

In addition, it can also be set to: when the slide table 8 is detected to be at the inspection position by the inspection position detection switch 14, the operating speed of the elevator equipment is limited to the inspection speed by the control device 17 . Thus, it can be prevented that the speed of the elevator equipment is switched to the normal running speed due to the operation of people other than the operator when the operator is inspecting, and it is also possible to prevent the operator from forgetting to remove the slide table 8 from the elevator after completing the inspection work. Returning the check position to the running position causes the control device 17 to activate the braking device 18 etc. if the elevator car 2 has not reached the critical speed. the

In addition, the intermediate shaft 9, the speed-up shaft 12, the middle gear 16, the speed-up gear 13, the transmission gear 11, the slide table 8, the reset spring 10 and the inspection position detection switch 14 can also be arranged as detachable structures. Here, like the inspection terminal 19, it can be provided as an inspection device that is installed by an operator at the time of inspection. the

As described above, according to the present invention, it is possible to provide an elevator device and an inspection method for the elevator device, so that the operating state of the abnormality coping device of the elevator car can be inspected conveniently in the actually installed elevator device, and the The inspection is completed in a short time. the

Symbol Description

1...Governor, 2...Elevator car, 3...Guide rail, 4 Roller, 5 Encoder, 6A, 6B...Spindle, 7 Base, 8...Sliding table, 9 Intermediate shaft, 10...Coil spring, 11A...No. 1st transmission gear, 11B...second transmission gear, 12 speed-up shaft, 13A...first speed-up gear, 13B...second speed-up gear, 14...check position detection switch, 15 clutch mechanism, 16...intermediate gear, 17... Control device, 18...brake device, 19...terminal for inspection, 20...governor speed line, 21...action signal line, 22...action speedometer, 23...dangerous speedometer, 24...brake indicator light

Claims (11)

1. A speed detection device, characterized in that it has: a rotating body, the rotating body is arranged in the hoistway and rotates in contact with the guide rail guiding the elevator car in the lifting direction; a rotation speed detection unit that detects the rotation speed of the rotating body; a rotation transmission shaft that puts the rotating body and the rotation speed detection unit in a transmission state when the elevator car is in normal operation, and that rotates when the elevator car is in inspection operation the transmission shaft puts the rotary body and the rotation speed detection unit in a non-transmission state; and A speed-up mechanism, when the elevator car performs normal operation, the speed-speed mechanism makes the rotating body and the rotation speed detection unit in a non-transmitting state, and when the elevator car performs inspection operation, the The speed-up mechanism puts the rotating body and the rotation speed detection unit in a transmission state, and increases the speed of the rotation of the rotation body and transmits it to the rotation speed detection unit. 2. A kind of elevator equipment, it has elevator car, the guide rail that guides described elevator car in lifting direction and speed detecting device, and described speed detecting device is installed on described elevator car, detects at least described elevator the speed of movement of the car, said elevator installation being characterized in that, The speed detecting device includes: a rotating body rotating in contact with the guide rail, a rotating speed detecting unit for detecting the rotating speed of the rotating body, and a rotational speed detecting unit capable of selectively placing the rotating body and the rotating speed detecting unit in communication with each other. state and non-transmission state of the rotation transmission shaft, and can selectively make the rotation body and the rotation speed detection unit in the transmission state and non-transmission state, and increase the rotation speed of the rotation body and then transmit it to the The speed-increasing mechanism of the rotation speed detection unit, The elevator apparatus is configured to put the speed increasing mechanism in a non-transmitting state when the elevator car is normally running, and to transmit the rotation of the rotating body to the rotation speed detection unit through the rotation transmission shaft. , and when the elevator car is inspecting, the rotation transmission shaft is in a non-transmission state, and the rotation speed of the rotating body is increased by the speed-up mechanism and then transmitted to the rotation speed detection unit. 3. Elevator installation according to claim 2, characterized in that The speed detection device is installed on the ceiling portion of the elevator car so that the rotating body is in contact with the guide rail. 4. Elevator installation as claimed in claim 3, characterized in that, The detection signal from the rotation speed detection means is sent to a control device mounted on the ceiling portion of the elevator car, thereby obtaining the moving speed of the elevator car. 5. Elevator installation as claimed in claim 2, characterized in that, The rotating body is a roller rotating in contact with the guide rail, and the rotation speed detecting means is an encoder for detecting rotation. 6. Elevator installation according to claim 2, characterized in that The rotation transmission shaft is divided into two rotation transmission shafts, the rotating body is provided on one of the first rotation transmission shafts, the rotation speed detection unit is provided on the other second rotation transmission shaft, and the first A rotation transmission shaft and the second rotation transmission shaft are selectively in a state of transmitting rotation and a state of not transmitting rotation through a clutch mechanism. 7. Elevator installation as claimed in claim 6, characterized in that, The clutch mechanism is any one of an engaging clutch mechanism and a friction clutch mechanism. 8. Elevator installation according to claim 2, characterized in that The speed-up mechanism is any one of the speed-up mechanism using a gear set, the speed-up mechanism using a pulley and a transmission belt, and the speed-up mechanism using a gear and a chain. 9. Elevator installation as claimed in claim 4, characterized in that, The speed detection device has an inspection position detection switch, the inspection position detection switch is arranged on the speed-increasing mechanism, and is used to detect whether the elevator car is performing an inspection operation, and the signal of the inspection position detection switch is Send it to the control device to judge the inspection running status. 10. Elevator installation as claimed in claim 9, characterized in that, The inspection position detection switch is any one of a mechanical contact switch and an optical contact switch. 11. An inspection method for elevator equipment, The elevator installation has: elevator car; guide rails for guiding the elevator car up and down in the lifting direction; The speed detection device installed on the ceiling portion of the elevator car, the speed detection device has: a rotating body that rotates in contact with the guide rail, a rotation speed detection unit that detects the rotation speed of the rotating body, and an optional a rotation transmission shaft that selectively puts the rotating body and the rotation speed detection unit in a transmission state and a non-transmission state, and selectively makes the rotation body and the rotation speed detection unit in a transmission state and a non-transmission state, And increase the rotational speed of the rotating body and transmit it to the speed-up mechanism of the rotational speed detection unit; and A control device installed on the ceiling portion of the elevator car for controlling the operation of the elevator car, the inspection method of the elevator equipment is characterized in that, During the inspection run of the elevator car, making the rotation transmission shaft in a non-transmission state, and through the speed increasing mechanism, the speed of rotation of the rotating body is increased and then transmitted to the rotation speed detection unit, Inputting the rotation speed signal of the rotation speed detection unit at this time into the control device to judge the moving speed of the elevator car, The judgment result obtained by the judgment is displayed on the inspection terminal connected to the control device, so as to inspect the operation of the elevator equipment.

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