JPH04189281A - Maintenance device for temporary elevator - Google Patents

Abstract

PURPOSE:To give an alarm according to the necessity of maintenance by comparing the integrated value of ascending/descending distance of an elevator body determined from the tooth number of a rack with the set value of ascending/ descending distance of the elevator body predetermined on the basis of maintenance necessity. CONSTITUTION:When the ascending/descending and stop of an elevator body 3 are conducted, the integrated value of its ascending/descending distance and the integrated value of its stop frequency are stored in a memory device 27, a central processing unit 61 reads the integrated values, compares them with the data stored in a memory device 62 to form a data file of the comparison content, and stores it in the memory device 62. When the integrated ascending/ descending distance of the elevator body 3 is conformed with the ascending/ descending distance stored in the memory device 62, or the integrated stop frequency in a fixed position of the elevator body 3 is conformed with the stop frequency stored in the memory device 62, an alarm signal outputting device 64 outputs an alarm signal, and a recording paper on which the alarm content is printed is printed out from a printer 66.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is applicable to temporary elevators and cargo lifts used to raise and lower workers and materials to construction floors, for example, at construction sites for high-rise buildings. The present invention relates to a device used to perform maintenance such as inspecting the wear and tear of rack teeth and confirming the necessity of replacing parts in temporary elevators such as the above.

(Prior Art) Conventionally, an elevating guide formed by vertically connecting a plurality of unit guides, an elevating body guided in the vertical direction by the elevating guide, and a plurality of unit racks are vertically connected. A temporary elevator is used in which the elevating body is provided with a pinion that meshes with the rack, and the elevating body is raised and lowered by the rotational drive of the pinion.

When such a temporary elevator is to be transported and used at a different construction site, since it is extremely long, it must be disassembled, transported, and reassembled at the construction site.

Therefore, the elevating guide and rack of the temporary elevator are formed by connecting a plurality of unit guides and unit racks as described above.

In addition, unit guides and unit racks are heavy, and the number increases as the lifting distance increases. Therefore, in a narrow construction site, it is difficult to add unit guides and unit racks in a fixed order, and it is very troublesome for the workers at the site. Furthermore, it is necessary to add unit guides and unit racks to accommodate differences in lifting height between different buildings, and for generalization, the same unit guides and unit racks must be used even if different temporary elevators are used. is said to be available.

For this reason, some unit guides and unit racks are used in which the order in which the units are connected can be changed in the vertical parallel order.

Periodic maintenance is essential for such temporary elevators, as wear and tear on the rack teeth and various parts can lead to accidents.

Conventionally, such maintenance inspections have been performed at regular intervals.

Conventionally, in order to control the stop position of the elevating body of a temporary elevator, a plurality of limit switches are attached to the elevating guide side, and a dog that turns on and off the limit switches is attached to the elevating body side, and the limit switches are turned on and off.
The lifting position of the lifting body was being detected when it was turned off. and,
The detection signal was used to stop the elevating body at a desired position.

Further, the lifting speed of the elevating body of the temporary elevating device is required to be high in order to transport personnel and materials at high speed.

In particular, when there is a shortage of manpower, there is a need to improve work efficiency.
In addition, in high-rise buildings, the lifting distance is long, so the lifting speed has a large effect on work efficiency.

Therefore, the ascending and descending speed of the elevating body is made as high as possible and is decelerated before the stop position.

Therefore, it is necessary to control the position at which the deceleration of the elevating speed is started, and the detection of the deceleration start position of the elevating body for this purpose has conventionally been performed using a limit switch.

In addition, according to the elevator structure standards by the Labor Standards Bureau,
The elevating body of a temporary elevator is required to have a means to electrically stop the elevating body when the reference speed exceeds a certain value, and to mechanically stop the elevating body when the reference speed is further exceeded. Therefore, it is necessary to control the speed of the elevating object. Conventionally, a roller is attached to the elevating object, and this roller is brought into contact with the elevating guide side so that it rotates as the elevating object moves up and down, and the number of rotations of this roller per unit time is It was detected by a sensor and calculated the speed.

(Problem to be solved by the invention) The need for maintenance of a temporary elevator varies depending on the frequency of use and the condition of use.

For example, the rate of wear of wear parts increases as the lifting distance of the elevating body increases.

In addition, the wear and tear on the rack teeth is not only affected by the lifting distance;
It is greatly affected by the load that acts on the teeth when braking the elevating body.

However, in conventional maintenance inspections carried out at regular intervals, the operator has no choice but to determine the timing of maintenance inspections based on his or her intuition based on the frequency of use, which is roughly determined by the operator. Not only is it not possible to perform maintenance on time;
Because the parts and locations that required maintenance were unknown, it was not possible to identify the locations to focus on inspecting.

Further, the stopping position of the elevating body of the temporary elevator is a construction floor necessary for bringing in workers and materials, and therefore varies depending on the progress of the construction work.

Further, when the temporary elevator is used at different construction sites, the stopping position may differ depending on the type of building even if the elevator is on the same floor.

Therefore, in conventional limit switches that detect the lifting position and deceleration start position of the lifting object and perform stop position control and deceleration control, the mounting position of the limit switch must be changed every time the lifting object stops at a different position. Is it necessary?
It's extremely troublesome. In addition, the change is dangerous because it requires work at heights.

Furthermore, as described above, the order in which unit guides and unit racks are connected may be changed due to disassembly and assembly when used at different construction sites.

Therefore, conventionally, each time the temporary elevator was once disassembled and reassembled, the limit switch had to be replaced depending on the stop position of the elevator.

In addition, when determining the speed of an elevating object by using a sensor to detect the rotation speed of the roller that rotates in contact with the elevating guide, accurate speed control is not possible if the roller slips. There wasn't.

Furthermore, when the elevating body is decelerated before the stop position as described above, if a dedicated limit switch for deceleration control is provided, the number of limit switches will increase. Therefore, normally the limit switch for detecting the stop position is also used for deceleration control, and the elevating body starts decelerating from the floor one floor before the stop position. If the distance between floors is long, it will take a long time to transport personnel and materials.

(Means for Solving the Problems) An object of the present invention is to provide a maintenance device for temporary elevators that can solve the problems of the prior art described above.The first invention is characterized by a plurality of unit guides. It is equipped with an elevating guide formed by vertically connecting each other, an elevating body guided in the vertical direction by this elevating guide, and a rack formed by vertically connecting a plurality of unit racks. In a temporary elevator that is equipped with a pinion that meshes with the rack, and in which the elevating object is raised and lowered by the rotational drive of the pinion, the lifting distance of the elevating object can be determined from the number of teeth of the rack. A counting means for counting the number of teeth of the rack is provided, and the cumulative value of the lifting distance of the lifting body calculated from the number of teeth of the rack and the set value of the lifting distance of the lifting body determined in advance based on the necessity of maintenance are provided. and a storage means for storing the integrated value and the set value,
The present invention has a warning means for issuing a warning according to the necessity of maintenance.

In addition, the second invention is characterized by an elevating guide formed by vertically connecting a plurality of unit guides, an elevating body guided in the vertical direction by the elevating guide, and a plurality of unit racks. In a temporary elevator, the elevating body is equipped with a pinion that engages with the rack, and the elevating body is raised and lowered by the rotational drive of the pinion. A counting means is provided to count the number of teeth on the rack as the elevating body moves up and down, so that the number of teeth can be calculated from the number of teeth on the rack. storage means for storing the stop position of the elevating object relative to the rack reference position, the cumulative value of the number of stops at each stop position, and the set value of the number of stops of the elevating object predetermined based on maintenance necessity; The present invention is characterized in that it is equipped with a warning means that compares the integrated value and the set value and issues a warning depending on the necessity of maintenance.

The third invention is characterized by an elevating guide formed by vertically connecting a plurality of unit guides, an elevating body guided in the vertical direction by this elevating guide, and a plurality of unit racks that are vertically connected. In a temporary elevator, the elevating body is provided with a pinion that meshes with the rack, and the elevating body is raised and lowered by the rotational drive of the pinion. A counting means is provided to count the number of teeth on the rack as the elevating object moves up and down, so that it can be determined from the number. is provided with a memory means for storing the reference position of the elevating body and a shape detection signal of the rack teeth in a normal state, and stores the shape detection signal of the rack teeth from the sensor and the stored normal state. It compares the shape detection signal with the shape detection signal of the rack, and issues a warning if there is a change in the shape of the rack teeth.It also compares the lifting distance of the elevating object calculated from the number of teeth of the rack with the memorized reference position, and detects the rack. It is provided with a warning means for determining the position of tooth shape change.

Further, in each of the above configurations, it is preferable that the unit guide and the unit rack are interchangeable in vertically parallel order when connected.

(Function) According to the configuration of the present invention, since the ascending and descending distance of the elevating object can be determined by counting the number of teeth of the rack, if the reference position for controlling the position of the elevating object is determined, the reference position can be used. The position of the elevating body can be controlled according to the number of teeth of the rack by the elevating distance from the rack.

Furthermore, since the vertical distance of the elevating body is determined by counting the number of teeth of the rack, position control is not affected by changing the vertical arrangement order of the unit racks or adding unit racks.

Furthermore, since the lifting distance of the elevating object can be determined by counting the number of teeth on the rack, there is no problem of slipping of the rollers used to determine the elevating distance, and the elevating speed can be accurately determined by simply installing a timer. .

According to the configuration of the first aspect of the present invention, the integrated value of the vertical distance of the elevating body is stored in the storage means.

Further, a set value of the ascending and descending distance of the elevating body, which is predetermined based on the necessity of maintenance, is stored in the storage means.

The magnitude of the set value is determined in advance based on the necessity of maintenance, and is determined based on, for example, data from a test run using a temporary test elevator or past performance data of the temporary elevator. For example, it is set based on the cumulative lifting distance of the lifting body at the time when the rack or teeth need to be replaced due to wear or damage, the cumulative lifting distance of the lifting body at the time when other parts are damaged, etc.

Then, the warning means compares the stored integrated value and the set value. This warning means makes it possible to create a file of comparison data between the integrated value and the set value.

Then, for example, a warning is issued when the integrated value matches the set value, when a worker requests maintenance data, or at regular intervals.

By displaying the warning content, for example, on a printer based on this warning signal, it is possible to recognize when maintenance is required and where to focus maintenance.

This display content can be, for example, the cumulative vertical distance of the elevating body, the amount of wear and damage of the rack over the cumulative vertical distance, and the damage rate of parts during the cumulative vertical distance. In this case, it is preferable to collect data in advance and store the data on the wear amount and chipping rate of the teeth of the rack and the damage rate of parts corresponding to the cumulative vertical distance in the storage means.

Alternatively, a warning lamp may be turned on to indicate that maintenance is required.

According to the configuration of the second invention, the stop positions of the elevating body and the integrated value of the number of stops at each stop position are stored in the storage means.

Further, a set value for the number of times the elevating body stops, which is predetermined based on the necessity of maintenance, is stored in the storage means.

The magnitude of the set value is determined in advance based on the necessity of maintenance, and is determined based on, for example, data from a test run using a temporary test elevator or past performance data of the temporary elevator. For example, it is set based on the number of times the elevating body stops at the position where the rack needs to be replaced due to tooth loss. Then, the warning means compares the stored integrated value and the set value. This warning means makes it possible to create a file of comparison data between the integrated value and the set value.

Then, for example, a warning is issued when the integrated value and the set value match, when a worker requests maintenance data, or at regular intervals.

By displaying the warning signal using a printer, for example, it is possible to recognize when maintenance is required and where maintenance should be focused.

This display content can be, for example, the stop position of the elevating body, the cumulative number of stops at each stop position, and the amount of wear and loss rate of the teeth of the rack for the cumulative number of stops. In this case, data on the amount of wear and loss rate of the teeth of the rack corresponding to the cumulative number of stops is collected in advance and stored in the storage means.

Alternatively, a warning lamp may be turned on to indicate that maintenance is required.

According to the configuration of the third aspect of the present invention, a sensor is provided to detect the shape of the teeth of the rack, and this shape detection signal changes when the teeth of the rack are damaged or worn. Than this,
By storing the shape detection signal in the normal state and comparing the stored signal with the detected signal, tooth wear can be detected and this can be issued as a warning. Furthermore, by storing the reference position of the rack, the position of the elevating object relative to the reference position can be determined by comparing the reference position with the vertical distance of the elevating object. Since the rack tooth shape detection sensor and the elevating body move together, the wear position of the rack teeth can be determined.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

A temporary elevator 1 shown in FIGS. 1 and 2 is used to lift and lower workers and materials to a construction floor at a construction site for a high-rise building.

The temporary elevator 1 includes an elevator guide 2, an elevator 3 that is vertically guided by the elevator guide 2, and a rack 4.

The lifting guide 2 is a unit guide 5 having a plurality of truss structures.
It is formed by connecting the above and below. The order in which the unit guides 5 are connected vertically can be changed.

The rack 4 is formed by vertically connecting a plurality of unit racks 1). The parallel order in which the unit racks 1) are connected vertically can be changed. Further, as shown in FIG. 3, the unit rack 1) is provided with a flange portion 12 extending in the width direction.

The elevating body 3 has a cage 6 formed of a floor plate and an enclosure, and a drive device 7 attached to the cage 6.

The drive device 7 has engagement recesses 14 that are vertically slidably engaged with both sides of the lift guide 2, and thereby the lift body 3 is guided up and down by the lift guide 2.

The drive device 7 is also provided with a pinion 9 that is rotationally driven by an electric motor 8, and this pinion 9 meshes with the rack 4. Thereby, the elevating body 3 is raised and lowered by the rotational drive of the pinion 9.

Further, the drive device 7 is provided with a governor type fall prevention device 10. This governor-type fall prevention device IO has a gear I3 that meshes with the rack 4 and a centrifugal speed governor (not shown) that is interlocked with this gear 13. When the rotational speed of the gear 13 increases, the rotation of the gear 13 is braked by the centrifugal governor, thereby mechanically braking the elevating body 3.

The lower part of the temporary elevator 1 is surrounded by a ground enclosure 22, and an outer door 23 is attached via an attachment vibrator 24 at a position corresponding to each construction floor.

As shown in FIG. 3, a proximity sensor 15 is attached to the elevating body 3 so as to face the teeth of the rack 4. This proximity sensor 15 is attached to the bracket 16 on the upper part of the drive bag ft7 via a compression spring 17, so that it moves together with the elevating body 3.

Further, a pair of arms 18 are attached to the proximity sensor 15, and each arm 18 is attached to the flange portion 1 of the rack 4.
A roller 19 in contact with roller 1 is attached, and this roller 1
9 is pressed against the flange portion 12 by the elastic force of the compression spring 17. Thereby, the distance between the proximity sensor 15 and a certain position (for example, a pitch line) of the rack 4 is kept constant.

When the elevating body 3 moves up and down, the distance (D) between the proximity sensor 15 and the teeth of the rack 4 changes depending on the unevenness of the teeth of the rack 4.
The amount of change is output from the proximity sensor 15 as a signal.

In this embodiment, the output signal of this proximity sensor 15 is the fourth
As shown in the figure, it is an analog signal, and the output value becomes 0 at the center of the convex part 20 of the tooth of the rack 4, the output value becomes the maximum value and the minimum value alternately at the center of the concave part 21, and further, the output value becomes 0 at the center of the convex part 20 of the tooth of the rack 4. There is an inflection point at the corner of

The output signal from this proximity sensor 15 is transmitted to a control device 25 mounted on the elevating body 3, as shown in FIG.

This control device 25 includes a central processing unit 26 and a ROM or R memory connected to this central processing unit 26 via an input/output device.
The main components include a memory device 27 such as AM, a multiplexer 28, an interrupt input device 29, a digital signal output device 30, and a pulse counter device 31.

The output signal from the proximity sensor 15 is converted into a pulse signal by a converter 32 mainly composed of a multiplier circuit, and is input to the pulse counter device 31. One pulse of the pulse signal is an integral multiple of the number of protrusions 20 on the rack 4. Thereby, the vertical distance of the elevating body 3 can be determined based on the number of pulses from the converter 32.

Further, an encoder 53 is provided that converts the rotation of the electric motor 8 using a pulse signal, and an output signal from the encoder 53 is input to the pulse counter device 31 via the encoder controller 33. One pulse of this pulse signal is also an integral multiple of the number of convex portions 20 of the rack 4 as described above. Thereby, the ascending and descending distance of the elevating body 3 can be determined based on the number of pulses from the encoder 53 and the encoder controller 33.

Further, a rack tooth shape sensing signal from the proximity sensor 15 bypassing the converter 32 is input to the rack abnormality monitoring device 34, and an output signal from the rack abnormality monitoring device 34 is sent to the interrupt input device 29 and the electric motor 8. It is output to the motor driver 35 of.

Note that the rack abnormality monitoring device 34 includes a central processing unit 34a.
, a storage device 34b, and an input/output device 34c.

Furthermore, the motor driver 35 also serves as a manual operating device for the electric motor 8.

The multiplexer 28 also includes a data setting device 36,
Output signals from the destination setting device 37 and ID card device 38 are input.

Further, the elevating body 3 is provided with a load cell 39, and an output signal from the load cell 39 is input to the multiplexer 28 via a load cell controller 40.

The output signal from the output device 30 is transmitted to the contact unit)-5.
1 to the motor driver 35.

Further, an origin detection proximity sensor 45 is attached to the elevating body 3, and an origin dog 46 is attached to the elevating guide 2. Then, the origin dog 4 is detected by the origin detection proximity sensor 45.
The detection signal No. 6 is input to the interrupt input device 29.

The position where this origin dog 46 is detected, that is, the origin position, becomes the reference position for controlling the position of the elevating body 3.

Further, a timer 47 that outputs a time signal is connected to the central processing unit 26.

A maintenance control device 60 is arranged on the ground.

This maintenance control device 60 includes a central processing unit 61 and a ROM connected to this central processing unit 61 via an input/output device.
It is mainly composed of a storage device 62 such as ROM or RAM, a multiplexer 63, and a warning signal output device 64. A data setting device 65 is connected to the multiplexer 63, and a printer 66 is connected to the warning signal output device 64.

The recontrol device 25.60 is connected via a multiplexer 28.63 and a modem 42.43 so that signals can be exchanged between the control device 25 and the maintenance control device 60.

Each construction floor is provided with an opening detection sensor 44 for the outer door 23 and an elevator call switch 70, each of which is connected to the control device 25 via a maintenance control device 60.

Next, the operation of the temporary elevator 1 will be explained with reference to a flowchart.

The operation of the temporary elevator l is controlled by the central processing unit 26 according to a control program stored in the storage device 27.

First, as shown in FIG. 6, an ID card such as a magnetic card is inserted into the ID card device 38. When the ID card device 38 confirms that the ID card is registered in the device 38 itself, it outputs a signal and the central processing unit 26
is ready to start control. If the ID card is not registered, an unconfirmed message is displayed on the display device 50.

Next, the elevating body 3 is manually raised and lowered by the motor driver 35, the origin dog 46 is detected by the origin detection proximity sensor 45, and this detected position is stored in the storage means 27 and used as the reference position for pulse counting. Set the origin with .

Next, the data setting device 36 sets initial data.

For example, the data setting device 36 sets the floor number of the construction floor on which the elevator 3 is to be stopped and the number of pulses representing the distance from the origin position to the construction floor corresponding to that floor number. It is input via the multiplexer 28 and stored in the storage device 27.

In addition, the data setting device 36 sets the number of pulses representing the distance from the origin position to the position where the elevating body 3 starts decelerating before stopping, and the number of pulses representing the distance from the start of deceleration until it stops. Each floor number is input via the multiplexer 28 and stored in the storage device 27.

Further, in order to cause the output device 30 to output a stop signal for the electric motor 8 when the ascending/descending speed of the elevating body 3 becomes more than or equal to a certain value than the reference speed, the reference elevating speed is stored in the storage device 27.

Next, the destination setting device 37 or the elevating object call switch 70 is used to select the floor on which the elevating object 3 is to be stopped.
Enter the number. Here, the elevating body 3 is raised to the upper floor and then stopped.

Then, a signal is output from the output device 30, the electric motor 8 is driven at the reference speed, and the elevating body 3 starts rising. This ascending distance is determined by the pulse counter device 31 counting the number of pulses corresponding to the number of teeth of the rack 4 based on the output signal from the proximity sensor 15. In addition, the elevating body 3
The rising speed of is calculated based on the number of pulses per fixed time using a signal from the timer 47.

The ascending distance is stored in the storage device 27. In addition, the display device 50 connected to the central processing unit 26 displays the elevating body 3.
For example, the construction floor corresponding to the current location is displayed digitally.

Note that if the proximity sensor 15 stops functioning due to a failure or the like, the pulse counter device 31 performs counting based on the signal from the encoder 53. That is, in this embodiment, the encoder 32 is used as a backstop for the proximity sensor 15.

The central treatment device 26 then uses a pulse counter device 31.
Compare the lifting distance of the lifting body 3 from the origin position determined by the number of pulses from the initial set deceleration start position and stop position of the lifting body 3 stored in the storage device 27,
When the deceleration start position is reached, the signal from the output device 30 is changed to start decelerating the electric motor 8, and when the stop position is reached, the electric motor 8 is stopped.

As a result, the elevating body 3 stops at the floor set by the destination setting device 37 - the construction floor with the number. The number of stops and the stop position are stored in the storage device 27.

Further, similar position control is performed when the elevating body 3 is stopped on the floor below.

That is, the floor number at which the elevator 3 is to be stopped is input using the destination setting device 37 or the elevator call switch 70.

Then, a signal is output from the output device 30, the electric motor 8 is driven at a predetermined speed, and the elevating body 3 starts to descend. This descending distance is determined by the pulse counter device 31 counting the number of teeth of the rack 4 based on the output signal from the proximity sensor 15.

Further, the number of pulses corresponding to the descending distance is integrated with the number of pulses corresponding to the ascending distance and stored in the storage device 27.

When the elevating body 3 reaches the initially set deceleration start position, the signal from the output device 30 changes and deceleration of the electric motor 8 is started. When the elevating body 3 reaches the stop position, the electric motor 8 stops and the elevating body 3 Stops at the set construction floor.

The number of stops and the stop position are also stored in the storage device 27.

Then, the elevating body 3 is repeatedly raised and lowered, and the same floor is raised again.
When the robot stops at , the number of stops at that position up to that point is added up, and the stop floor position and the accumulated number of stops are stored in the storage device 27 .

In addition, as shown in FIG. 7, a proximity sensor 4 for detecting the origin
When the origin dog 46 is detected again, the position of the elevating body 3 is calculated based on the number of pulses, and if this calculated position is not the home position, the elevating body 3 is raised or lowered by the difference, and the error is eliminated. Recovery is being planned.

Further, as shown in FIG. 8, when the vertical speed of the vertical body 3 exceeds a certain value stored in the storage device 27 due to some abnormality, the electric motor 8 is stopped by a signal from the output device 30, and the vertical body 3 is stopped by a signal from the output device 30. is suddenly stopped. The cause of this sudden stop (
(up/down speed above a certain value), the position, the number of times, and the date and time are stored in the storage device 27.

This stopped state is canceled by the operator operating a reset switch (not shown).

Furthermore, even though the electric motor 8 is stopped, the elevating body 3 continues to move up and down, and when the ascent and descent speed increases further, the governor type fall prevention device 10 is activated and the elevating body 3 is moved up and down into the machine, as shown in FIG. suddenly stopped.

The cause of this sudden stop (governor operation), the position, the number of times, and the date and time are stored in the storage device 27. To recognize the operation of the governor-type fall prevention device 10, for example, a switch is provided that is turned on by the operation of the governor-type fall prevention device 10, and a signal from this switch is input to the central processing unit 26. This stopped state is canceled when the governor type fall prevention device IO is activated or canceled by the operator, and a reset switch (not shown) is operated.

Further, as shown in Fig. 1O, when a load of a certain value or more is loaded on the elevating body 3, the load cell controller 40 outputs an overload signal, and this signal causes the output device 30 to output a signal and the electric motor 8 stops. As a result, the elevating body 3 is suddenly stopped. The cause (overload), location, number of times, and date and time of this sudden stop are stored in the storage device 27. This stopped state is canceled by the operator operating a reset switch (not shown).

Further, the outer door 23 is provided at a position corresponding to the construction floor, and is opened only when the elevating body 3 stops on the construction floor. Therefore, as shown in Fig. 1,
If the outer door 23 is opened for any other reason, a signal from the open detection sensor 44 of the outer door 23 is input to the control device 25 on the elevating body 3 via the maintenance control device 60. As a result, the output device 30 outputs a stop signal, the electric motor 8 is stopped, and the elevating body 3 is suddenly stopped. The cause of this sudden stop (outside door abnormality), location, and number of times are stored in the storage device 27. This stopped state is canceled by the operator operating a reset switch (not shown).

Furthermore, the signal from the proximity sensor 15 is as described above.
This corresponds to the shape of the teeth of the rack 4.

For example, a tooth loss on a rack usually occurs at a corner of the convex portion 20, and when the tooth loss occurs, the proximity sensor 1
The inflection point of the signal from 5 varies. This allows detection of missing or worn teeth on the rack.

That is, the detection signal from the proximity sensor 15 indicating that the teeth of the rack 4 are in a normal state with no wear or damage is stored in the storage device 34b of the rack abnormality monitoring device 34.

Then, as shown in FIG. 12, the shape recognition signal from the proximity sensor is sent to the central processing unit 3 of the rack abnormality monitoring device 34.
4a and is compared with the detection signal from the tooth proximity sensor 15 in a normal state stored in the storage device 34b. If there is a change from the detection signal in the normal state, a stop signal for the electric motor 8 is output to the motor driver 35, and the elevating body 3 is suddenly stopped.

Further, the proximity sensor 15 moves together with the elevating body 3, and the ascending and descending position of the elevating body 3 is determined by the ascending and descending distance from the origin position by counting the number of teeth of the claw 4.

Therefore, when the rack tooth wear detection signal from the rack abnormality detection device 34 is input to the central processing unit 26,
The wear position can be determined. The cause of this sudden stop (rack abnormality), location, date and time, and number of times are stored in the storage device 27.
is memorized. This stopped state is canceled by the operator operating a reset switch (not shown).

Next, the operation of the maintenance control device 60 for the temporary elevator 1 will be explained with reference to the flowchart in FIG. 13. This maintenance control device 60 operates according to a control program stored in a storage device 62.

First, data is transferred to the storage device 6 by the data setting device 65.
2. The data to be stored is obtained based on the necessity of maintenance, and includes the ascent/descend distance of the elevating body and the number of stops.

This data is obtained from, for example, test data from a temporary lifting device for testing or data from past experiments using the temporary lifting device. Specifically, for example, the value that represents the cumulative lifting distance of the elevator when the teeth of the rack are worn to the extent that they require replacement, and the value that represents the cumulative lifting distance of the elevator when the teeth of the rack are worn to the extent that they require replacement, and the value that represents the cumulative lifting distance of the elevator when the component parts of the temporary elevator have a failure rate or breakage rate that exceeds a certain percentage. The data represents the value of the cumulative lifting distance of the elevating body corresponding to the component in the event of a failure or damage, and the value of its failure rate and damage rate. In addition, if the cumulative lifting distance that causes failure or damage, etc. differs depending on the part,
A plurality of pieces of data for each portion are stored in the storage device 62.

In addition, for example, we conducted a test in which the elevating body was stopped at a certain position at a constant speed, and when the teeth of the rack were damaged at a rate exceeding a certain percentage, we calculated the elevating speed of the elevating body and the cumulative number of stops of the elevating body. The data represented is stored in the storage device 62. Also, a plurality of data items are stored in correspondence with differences in defect rates and lifting/lowering speeds.

Then, when the elevating body 3 is raised and lowered and stopped, and as described above, the cumulative value of the vertical distance and the cumulative value of the number of stops are stored in the storage device 27, the central processing unit 61 stores the cumulative value. is read, compared with the data stored in the storage device 62, creates a data file of the comparison contents, and stores it in the storage device 6.
Store in 2. The contents of this data file are as follows:
Changes will be made as the lifting distance and number of stops increase.

For example, if the cumulative lifting distance of the lifting body 3 matches the lifting distance stored in the storage device 62, or if the cumulative number of stops of the lifting body 3 at a certain position and the storage device 62 store it. If the number of stops matches the number of stops, the warning signal output device 64 outputs a warning signal, and the printer 66 prints out a recording paper on which the warning contents are printed.

The contents of the recording paper correspond to the contents of the data file created by the maintenance control device 60, and include, for example, a display indicating the cumulative vertical distance of the elevating body 3 and an instruction to replace the rack at that cumulative vertical distance. , display the failure rate or breakage rate of a predetermined part over the cumulative lifting distance and the name of the part, display the number of times the lifting body stops and the tooth loss rate of the rack at that number of stops, etc.

Note that the output of the signal from the warning signal output device 64 is not limited to the signal from the central processing unit 61 as described above; for example, the signal may be output at fixed intervals, or the signal may be output by the worker A signal may be output every time a request is made. In that case, the period during which the warning signal output device 64 outputs the signal is stored in the storage device 62, or a manual operation switch is provided to instruct the warning signal output device 64 to output the signal.

In short, the warning signal may be outputted from the warning signal output device 64 depending on the necessity of maintenance.

Further, the display of the warning content by the signal from the warning signal output device 64 is not limited to the display by the printer 66, and may be performed by, for example, lighting a lamp.

In addition, if the vertical movement speed of the vertical movement exceeds a certain value and stops, there is a possibility that an abnormality has occurred in the speed control system.

Furthermore, if there is a mechanical stop due to the operation of the governor-type fall prevention device, there is a possibility that an abnormality has occurred in the electrical stop control system.

In addition, if there is a stoppage due to the load of the elevating object exceeding a certain value, there is a possibility that the support portion of the elevating object has been damaged due to overload.

Furthermore, if the outer door opens irregularly, there may be an abnormality in the opening/closing control system of the outer door.

Therefore, the number of times the elevator 3 stops, the stop position, the cause of the stop, the date and time of the stop are also displayed on the memory paper from the printer 66.

Further, the part number of each part of the temporary elevator 1 and the period of use thereof are also stored in the storage device 62. This is because the parts of the temporary elevator 1 can be shared by different temporary elevators, and some parts, such as the rack 4, may be unnecessary depending on the height of the building at different construction sites. Therefore, by memorizing the usage frequency of such parts and displaying it on a recording paper printed out from the printer 66 when construction is completed, it can be used as data for determining when replacement is necessary.

Further, the lifting distance of the elevating body 3 differs depending on the construction floors; for example, it differs between the 1st floor and the 2nd floor, and between the 10th floor and the 1) floor. Therefore, by storing the number of times the elevator 3 goes up and down between each construction floor in the storage device 26 and displaying it on the recording paper printed out from the printer 66, the floors where rack wear and tear are to be intensively inspected are stored. It is possible to recognize the gap.

In addition, the weight carried by the elevating body 3 is also
Since the load varies depending on the time, the total sum of the loads detected by the load cell 39 may be stored for each construction floor and printed out.

According to the above-mentioned temporary elevator 1, the position control and speed control of the elevating body 3 are performed by calculating the vertical distance of the elevating body 3 by counting the number of teeth of the rack 4. Therefore, there is no need for the dangerous installation work of the limit switch at a high place or the troublesome replacement work when disassembling and reassembling the limit switch, which is required in the past.

Further, the speed of the elevating body 3 can be calculated based on the ascending and descending distance of the elevating body 3 obtained from counting the number of teeth of the rack 4, so that accurate speed management can be achieved.

Then, the maintenance of the temporary elevator 1 is performed using data obtained in advance,
When comparing the actual measurement data, data is obtained based on the lifting distance and stopping position of the elevating body 3 obtained from counting the number of teeth on the rack 4, so it is easy and reliable to focus on maintenance and inspection. You can recognize locations and parts that need replacing.

Note that the present invention is not limited to the above embodiments.

For example, when the vertical height of the vertical body 3 is large, a reference dog may be provided in addition to the origin dog 46 for finely adjusting the vertical position of the vertical body 3.

In addition, a proximity sensor 15 is used to count the number of teeth of the rack 4.
It is also possible to provide only one of the encoder 53 and the encoder 53.

Further, the present invention can be applied to a lift exclusively for cargo, and in this case, although operating means such as a data setting device and a destination setting device are provided on the elevating body in the above embodiment, these operating means are provided on the ground.

(Effects of the Invention) According to the present invention, it is possible to recognize when a temporary elevator requires maintenance and which parts require priority maintenance.

Furthermore, this recognition is based on calculating the lifting distance of the lifting object by counting the number of teeth on the rack, so limit switches cannot be installed at high places as in the past to regulate the position and speed of the lifting object. It is preferable as a maintenance device for temporary elevators because it does not require dangerous work or the troublesome work of replacing parts when disassembling and reassembling.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a rear view of the main parts of the temporary elevator, FIG. 2 is a perspective view of the temporary elevator, FIG. 3 is an explanatory diagram of the installation state of the sensor, and FIG. 4 is the output of the sensor. An explanatory diagram of signals, Fig. 5 is a control block diagram of the temporary elevator, Figs. 6 to 12 are flowcharts for explaining the control contents of the temporary elevator, respectively, and Fig. 13 is a control content of the maintenance device of the temporary elevator. FIG. 2 is a flowchart diagram for explaining. l... Temporary elevator, 2... Elevating guide, 3... Elevating body, 4... Rack, 5... Unit guide, 1)...
- Unit rack, 15... Proximity sensor, 25... Control device, 26... Central processing unit, 27... Storage device, 31... Pulse counter device, 60... Maintenance control device, 61...Central processing unit, 62...Storage device, 64...Warning signal output device.

Claims (4)

[Claims] (1) An elevating guide formed by vertically connecting multiple unit guides, an elevating body guided in the vertical direction by this elevating guide, and a rack formed by vertically connecting multiple unit racks. In a temporary elevator in which the elevating body is provided with a pinion that meshes with the rack, and the elevating body is raised and lowered by the rotational drive of the pinion, the elevating distance of the elevating body can be determined from the number of teeth of the rack. , a counting means is provided to count the number of teeth on the rack as the elevating body moves up and down, and a predetermined count is provided based on the cumulative value of the elevating distance of the elevating body calculated from the number of teeth on the rack and the necessity of maintenance. A temporary elevator characterized in that it is equipped with a storage means for storing a set value of a lifting distance of an elevating object, and a warning means for comparing the integrated value and the set value and issuing a warning depending on the necessity of maintenance. Maintenance equipment. (2) An elevating guide formed by vertically connecting multiple unit guides, an elevating body guided in the vertical direction by this elevating guide, and a rack formed by vertically connecting multiple unit racks. In a temporary elevator in which the elevating body is provided with a pinion that meshes with the rack, and the elevating body is raised and lowered by the rotational drive of the pinion, the elevating distance of the elevating body can be determined from the number of teeth of the rack. , a counting means is provided for counting the number of teeth of the rack as the elevating object moves up and down, and the stopping position of the elevating object with respect to the rack reference position is determined based on the elevating distance of the elevating object determined from the number of teeth of the rack. and a storage means for storing an integrated value of the number of stops at each stop position and a set value of the number of stops of the elevating body predetermined based on maintenance necessity, and compares the integrated value and the set value, A maintenance device for a temporary elevator, characterized in that it is equipped with a warning means that issues a warning depending on the necessity of maintenance. (3) An elevating guide formed by vertically connecting multiple unit guides, an elevating body guided in the vertical direction by this elevating guide, and a rack formed by vertically connecting multiple unit racks. In a temporary elevator in which the elevating body is provided with a pinion that meshes with the rack, and the elevating body is raised and lowered by the rotational drive of the pinion, the elevating distance of the elevating body can be determined from the number of teeth of the rack. , a counting means is provided to count the number of teeth on the rack as the elevating object moves up and down, and a sensor for detecting the shape of the teeth of the rack is provided so as to move up and down along with the elevating object. A storage means is provided for storing the position and a shape detection signal of the rack teeth in a normal state, and the shape detection signal of the rack teeth from the sensor is compared with the stored shape detection signal in the normal state. It issues a warning when the shape of the rack teeth changes, and also compares the lifting distance of the elevating object, which is determined from the number of teeth on the rack, with the memorized reference position, and calculates the position where the shape of the rack teeth changes. A maintenance device for a temporary elevator, characterized in that a means is provided. (4) The temporary elevator according to any one of claims (1) to (3), wherein the unit guide and the unit rack are arranged in such a manner that the order in which they are arranged vertically in parallel can be changed. Maintenance equipment.