JP2000291748A - Diagnostic device for elongation degree of chain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diagnostic device for the elongation degree of a chain which can accurately diagnose the elongation degree of the chain. SOLUTION: This device comprises passing detectors 12A to 12C detecting passing of a chain, passing measurement part 17 measuring a pulse period of the chain by a pulse signal, decision part 18 deciding abnormal elongation of the chain based on a change of the pulse period of the chain and a decision value, rotation detector 30 detecting rotation of a rotary shaft provided in a drive machine 2, rotation measurement part 29 measuring a number of revolutions for a fixed time and a rotational speed of the rotary shaft, and a correction part 32 calculating a speed coefficient by a measurement value of the rotation measurement part 29 also correcting the pulse period measured by the passing measurement part 17 based on the speed coefficient. In this way, abnormal elongation of the chain is diagnosed from the change of the pulse period directly detected from the chain, also the pulse period is corrected by the correction part 32 in accordance with a speed change of the chain, and an elongation degree of the chain is accurately diagnosed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chain elongation diagnostic device for diagnosing the elongation of a chain provided in a transport device.

[0002]

2. Description of the Related Art In general, a transfer device, for example, a passenger conveyor is provided with steps for mounting passengers and objects, and handrails gripped by passengers, and these steps and handrails are driven to rotate by a driving device. It is configured to move endlessly synchronously by an endless chain.
Further, the chain grows over time, and the degree of the growth varies depending on the use time and the load condition, so that a maintenance work is required.

Conventionally, as a chain elongation degree diagnosing device for diagnosing the elongation degree of a chain, a sign is conventionally provided on a chain, and a detecting unit for detecting passage of the sign detects a length dimension per unit of the chain. Has been proposed.

[0004] Examples of this type include those described in Japanese Patent Application Laid-Open No. Hei 7-137977.

[0005]

In the above-described conventional chain elongation degree diagnosing device, a mark is provided on the chain to detect the elongation of the chain. Had to be provided with new signs, which required a great deal of labor and time.
In addition, even in the case of a newly installed chain, since the mounting accuracy of the sign greatly affects the detection result, it is difficult to ensure the reliability in determining the degree of elongation. In addition, since the chain is configured to engage with the sprocket, a marker must be provided on the side of the chain, and a sensor for detecting the marker must be arranged close to the side of the chain in accordance with this. Since the middle chain vibrates in a direction perpendicular to its driving direction, it has been extremely difficult to always detect the sign with a sensor fixed at a predetermined position.

When the chain meshes with a sprocket that is driven to rotate, the pitch circle diameter of the sprocket matches the center of the roller of the chain in the initial state of the chain. However, when the chain is extended, the center of the roller of the chain is larger than the pitch circle diameter of the sprocket. It will be rotationally driven out of position. Therefore, even if the peripheral speed of the chain that meshes with the sprocket changes over time, the angular speed of the sprocket that is driven to rotate does not change over time, so the operating speed of the extended chain becomes faster than the initial state,
Even if the chain extends, the passing time of one round of the chain in the initial state does not change. For this reason, it is difficult to detect the length of the chain per unit even if a sign is provided on the chain at regular intervals and the passage of the sign is detected, and it is difficult to accurately detect the elongation of the chain. . In addition to the above-mentioned problems, the chain is rotated by a driving machine.However, since the chain driving method and structure are different, and the chain moving speed changes due to the load on the chain, the elongation of the chain is reduced. It is difficult to determine accurately.

The present invention has been made in view of such a situation in the prior art, and an object of the present invention is to provide a chain elongation diagnostic device capable of accurately diagnosing the elongation of a chain.

[0008]

In order to achieve this object, the invention according to the first aspect of the present invention is provided in a conveying device for driving a chain via a driving machine, and diagnoses the degree of extension of the chain. In the elongation degree diagnostic device for a chain, a passage detector that detects passage of the inner link portion and the outer link portion of the chain, and a pulse signal output from the passage detector detects the passage of the inner link portion and the outer link portion of the chain. A passage measurement unit that measures a pulse period, a determination unit that determines abnormal elongation of the chain based on a change and a determination value of a pulse period of an inner link portion and an outer link portion of the chain, and a rotation shaft that is provided in the driving machine. A rotation detector for detecting the rotation of the rotating shaft, and a rotation measuring device for measuring the number of rotations and the rotation speed of the rotating shaft for a certain period of time based on an output signal output from the rotation detector. And parts, calculates the speed coefficient by the measurement value of the rotation measuring unit, which are not configured to include a correction section that corrects the pulse period based on the speed coefficient.

According to the first aspect of the present invention, the passage detector detects the passage of the inner link portion and the outer link portion of the chain, outputs a pulse signal, and outputs a pulse signal. Measures the pulse period of the inner link portion and the outer link portion of the chain by the pulse signal,
The abnormal elongation of the chain is determined by the determining unit based on the change in the pulse period and the determination value. At this time, the rotation detector detects the rotation of the rotation shaft provided in the driving machine, and the rotation measuring unit calculates the number of rotations and the rotation speed of the rotation shaft for a certain period of time based on an output signal output from the rotation detector. The correction unit calculates the speed coefficient based on the measured value of the rotation measurement unit, and corrects the pulse cycle based on the speed coefficient. As described above, since the abnormal elongation of the chain is diagnosed from the change in the pulse period detected directly from the chain, it is not necessary to provide a mark on the chain as in the related art, and therefore, the degree of elongation of the chain can be accurately diagnosed. . Further, even if there is an irregular change in the moving speed of the chain, the pulse period is corrected by the correcting unit according to the change in the speed of the chain, so that the elongation degree of the chain can be diagnosed more accurately.

According to another aspect of the present invention, there is provided a transport device for driving a chain via a driving machine, the diagnostic device for elongating the chain for diagnosing the elongation of the chain. A passage detector for detecting passage of an inner link portion and an outer link portion of the chain, and a passage for measuring a pulse period of the inner link portion and the outer link portion of the chain based on a pulse signal output from the passage detector. A measuring unit, a judging unit for judging abnormal elongation of the chain based on a change and a judgment value of a pulse period of an inner link portion and an outer link portion of the chain, and a rotation detecting rotation of a rotating shaft provided in the driving machine. A detector, a rotation measuring unit that measures the number of rotations and the rotation speed of the rotation shaft for a predetermined time based on an output signal output from the rotation detector, and Calculates the speed coefficient by measurement of tough, are a configuration that includes a correcting unit for correcting the determination value based on the speed coefficient.

According to the second aspect of the present invention configured as described above, the passage detector detects the passage of the inner link portion and the outer link portion of the chain, outputs a pulse signal, and outputs a pulse signal. The pulse period of the inner link portion and the outer link portion of the chain is measured by the above pulse signal, and abnormal elongation of the chain is judged by the judging section based on the change of the pulse period and the judgment value. At this time, the rotation detector detects the rotation of the rotation shaft provided in the driving machine, and the rotation measuring unit calculates the number of rotations and the rotation speed of the rotation shaft for a certain period of time based on an output signal output from the rotation detector. The correction unit calculates the speed coefficient based on the measured value of the rotation measuring unit, and corrects the determination value based on the speed coefficient. As described above, since the abnormal elongation of the chain is diagnosed from the change in the pulse period detected directly from the chain, it is not necessary to provide a mark on the chain as in the related art, and therefore, the degree of elongation of the chain can be accurately diagnosed. . Further, even if there is an irregular change in the moving speed of the chain, the correction value is corrected by the correcting unit according to the change in the speed of the chain, so that the elongation degree of the chain can be diagnosed more accurately.

According to a third aspect of the present invention, there is provided a transport apparatus for driving a chain via a driving machine, the apparatus for diagnosing the degree of elongation of the chain. A passage detector for detecting passage of an inner link portion and an outer link portion of the chain, and a passage for measuring a pulse period of the inner link portion and the outer link portion of the chain based on a pulse signal output from the passage detector. A measuring unit, a judging unit that judges abnormal elongation of the chain based on a change and a judgment value of a pulse period of the inner link portion and the outer link portion of the chain, and a speed that calculates a pulse period measured by the passage measuring unit. A configuration is provided that includes a correction unit that calculates a coefficient and corrects the pulse cycle based on the speed coefficient.

According to the third aspect of the present invention, the passage detector detects the passage of the inner link portion and the outer link portion of the chain, outputs a pulse signal, and outputs a pulse signal. The pulse period of the inner link portion and the outer link portion of the chain is measured by the above pulse signal, and abnormal elongation of the chain is judged by the judging section based on the change of the pulse period and the judgment value. Further, at this time, the correction unit calculates the speed coefficient by calculating the pulse period measured by the passage measurement unit, and corrects the pulse period based on the speed coefficient. As described above, since the abnormal elongation of the chain is diagnosed from the change in the pulse period detected directly from the chain, it is not necessary to provide a mark on the chain as in the related art, and therefore, the degree of elongation of the chain can be accurately diagnosed. . Further, even if there is an irregular change in the moving speed of the chain, the pulse period is corrected by the correcting unit according to the change in the speed of the chain, so that the elongation degree of the chain can be diagnosed more accurately.

According to a fourth aspect of the present invention, there is provided a transport apparatus for driving a chain via a driving machine, the diagnostic apparatus for diagnosing the degree of elongation of the chain. A passage detector for detecting passage of an inner link portion and an outer link portion of the chain, and a passage for measuring a pulse period of the inner link portion and the outer link portion of the chain based on a pulse signal output from the passage detector. A measuring unit, a judging unit that judges abnormal elongation of the chain based on a change and a judgment value of a pulse period of the inner link portion and the outer link portion of the chain, and a speed that calculates a pulse period measured by the passage measuring unit. A correction unit that calculates a coefficient and corrects the determination value based on the speed coefficient is provided.

According to the fourth aspect of the present invention, the passage detector detects the passage of the inner link portion and the outer link portion of the chain, outputs a pulse signal, and outputs a pulse signal. The pulse period of the inner link portion and the outer link portion of the chain is measured by the above pulse signal, and abnormal elongation of the chain is judged by the judging section based on the change of the pulse period and the judgment value. At this time, the correction unit calculates the speed coefficient by calculating the pulse period measured by the passage measurement unit, and corrects the determination value based on the speed coefficient. As described above, since the abnormal elongation of the chain is diagnosed from the change in the pulse period detected directly from the chain, it is not necessary to provide a mark on the chain as in the related art, and therefore, the degree of elongation of the chain can be accurately diagnosed. . Further, even if there is an irregular change in the moving speed of the chain, the correction value is corrected by the correcting unit according to the change in the speed of the chain, so that the elongation degree of the chain can be diagnosed more accurately.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a chain elongation diagnostic apparatus according to the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing a first embodiment of a chain elongation degree diagnosing apparatus according to the present invention, FIG. 2 is a flowchart showing a processing procedure of the chain elongation degree diagnosing apparatus of FIG. 1, and FIG. 4 is a sectional view taken along line PP of FIG. 3 showing the initial state of the chain, and FIG. 5 is a sectional view taken along line PP of FIG. 6, FIG. 6 is a waveform diagram of an output signal output when a chain in an initial state is detected, FIG. 7 is a waveform diagram of an output signal output when a chain that has worn out is detected, and FIG.
FIG. 4 is an explanatory diagram showing a measurement result of a pulse period of a chain by the chain extension degree diagnostic apparatus of FIG. 1.

In general, as shown in FIG. 1, a transfer device for transmitting or transferring power by means of a chain forming a short track, for example, an escalator is provided in a machine room and a motor 3 is provided.
Escalator driving driving machine 2 having 1
Are connected to an upper drive step chain sprocket 4 via a driving chain 3. The handrail driving sprocket 6 supported on the same shaft 5 as the upper driving step chain sprocket 4 is connected to the double sprocket 8 via a handrail driving main chain 20A. This double sprocket 8
Is connected to a driving roller 11 of a handrail driving device 10 via a handrail driving tension chain 20B and a handrail driving driving chain 20C, and the endless handrail 1 is connected via the driving roller 11. It is rotating and moving. The escalator driving driving machine 2 is hereinafter referred to as a driving machine 2.
And

The chain extension diagnosing device according to the first embodiment includes a handrail driving main chain 20.
A chain guide 13A including a chain passage detector 12A for detecting passage of an inner link portion and an outer link portion of A
A chain guide 13B including a chain passage detector 12B for detecting passage of an inner link portion and an outer link portion of the handrail driving tension chain 20B, and a chain guide 13B including an inner link portion and an outer link portion of the handrail driving driving chain 20C. And a chain guide 13C including a chain passage detector 12C for detecting passage.
12C is connected to the MPU 24 via the switching unit 16. When the chain passage detector 12A finishes detecting the pulse of the handrail driving main chain 20A, the switching unit 16 enables the chain passage detector 12B to detect the pulse of the handrail driving tension chain 20B, Next, a switching process is performed so that the chain passage detector 12C can detect the pulse of the handrail driving driving chain 20C. Further, the driving machine 2 is provided with a rotation detector 30 for detecting the rotation of the rotating shaft of the driving machine 2. The above-mentioned chain passage detectors 12A to 12C are oils unique to the chain drive unit,
It consists of a magnetic sensor or the like that can detect only the roller of the chain, which is a steel part, without being affected by dust or water, that is, it can detect the presence or absence of metal shielding.

Then, the MPU 24 detects the chains 20A-2C from the pulse signals of the chain passage detectors 12A-12C.
Diagnosis of abnormal elongation based on the passage measurement unit 17 for measuring the pulse periods of the inner link portion and the outer link portion of 0C and the change and the judgment value of the pulse period of the inner link portion and the outer link portion of the chains 20A to 20C. 20A-20C
Determining unit 18 for quantitatively determining the degree of elongation of
From the determination result of the degree of elongation of the chains 20A to 20C by, for example, calculating the amount of change by comparing with the latest determination result,
This is divided by the elapsed time to obtain the amount of change per unit time, and a prediction unit 19 for predicting a chain abnormality time or a chain replacement time indicating a time required for the elongation of the chains 20A to 20C to reach an abnormal state; A rotation measuring unit 29 for measuring the number of rotations and the rotating speed of the rotating shaft of the driving machine 2 for a certain period of time based on the output signal of the driving device 30, And a correction unit 32 that corrects the pulse period based on the pulse period.

The MPU 24 stores the measurement results of the rotation measurement unit 29 and the passage measurement unit 17, the judgment results of the judgment unit 18, the chain abnormality time and chain replacement time by the prediction unit 19, the date and time of the diagnosis, and the like. The storage unit 25 is connected, and a communication unit 26 is connected to the storage unit 25, and the information and the like stored in the storage unit 25 are periodically transmitted to the monitoring center 27. Further, the determination unit 18
When it is determined that the chains 20A to 20C have reached abnormal extension, a control command is output to the drive control unit 28 to control the chain drive.

Here, the process of elongation of the chain will be described. Chain elongation is classified into elastic elongation, plastic elongation, and wear elongation. Generally, chain elongation refers to wear elongation, which accounts for the largest proportion of elongation. This wear elongation will be described with reference to FIGS.

The chain includes an inner link plate 21B and an outer link plate 21A alternately arranged,
A roller 15 which is arranged at the connecting portion of the two link plates 21A and 21B, is engaged with the sprocket, and is detected by the aforementioned chain passage detectors 12A to 12C;
A bush 22 inserted into the roller 15 and fitted into the inner link plate 21B, and a pin 2 inserted into the bush 22 and fitted into the outer link plate 21A.
3 is comprised. Here, gaps exist between the roller 15 and the bush 22 and between the bush 22 and the pin 23, and the roller 15 freely rotates between the bush 22 and the bush 22.
And the pin 23 is fixed to the outer link plate 21A, so that the bush 22 and the pin 23 are fixed.
It does not rotate itself. The fact that the chain bends or engages with the sprocket to draw a circular arc is a phenomenon in which the bush 22 and the pin 23 vibrate due to the gap existing between the bush 22 and the pin 23.

Since the chain 20 has such a structure, if the chain 20 is driven to rotate and bends by meshing with the sprocket, the outer diameter of the pin 23 and the inner diameter of the bush 22 are naturally caused by vibration between the bush 22 and the pin 23. Wear progresses, and wear elongation occurs in the direction in which the gap expands. When the chain 20 becomes worn and stretched, the chain is constantly pulled in both directions shown by arrows in FIG. 5 during driving, so that the gap between the bush 22 and the pin 23 is shifted to one side, and the gap between the bush 22 and the pin 23 is adjacent to the roller 15 from the outer diameter surface. The distance to the outer diameter surface of the matching roller 15 changes. On the other hand, the dimensions j2 and j4 between the rollers 15 in the inner link plate 21B to which the bush 22 is fixed are not changed, and j2 = j2a and j4 = j4a even in a worn state. Further, when the dimensions j1 and j3 between the rollers 15 in the outer link plate 21A to which the pins 23 are fixed are in a worn state, they expand from j1 to j1a and from j3 to j3a, respectively, and the entire chain 20 is extended. Further, the diameter of the roller 15 is reduced due to the outer diameter surface of the roller 15 contacting the sprocket and being worn. However, the amount of wear is not so much as the gap between the bush 22 and the pin 23 and is very small. Here, the amount of change can be ignored. This phenomenon of wear elongation shows the same tendency for one rotation of the chain.
Even if the distance between 5 becomes j2a, j4a from j2, j4, j
The relationship of 2 = j2a and j4 = j4a holds almost without change, and the distance between the rollers 15 at the outer link plate 21A increases from j1, j3 to j1a, j3a.
The relations j1 <j1a and j3 <j3a hold.

Next, the operating principle of the elongation degree diagnosing apparatus utilizing the characteristics of the above-described chain that has undergone wear and elongation will be described with reference to FIGS. 6 and 7. FIG.

In FIG. 6, the pulse width H1 from the rise to the fall of the pulse forming the peak of the waveform,
H2, H3, and H4 correspond to the passage times of the outer diameter portions h1, h2, h3, and h4 of the roller 15 shown in FIG.
The pulse interval J1, J2, J3, J4 from the fall to the rise of the pulse forming the valley is the dimension j1 from the outer diameter surface of the roller 15 shown in FIG. 4 to the outer diameter surface of the roller 15 adjacent thereto. , J2, j3, j4. The diameter of the roller 15 is h1 = h2 = h3 =
Since it is h4, the corresponding pulse width of the transit time is also H1 = H2 = H3 = H4. Further, since the chain 20 in the initial state has no wear and elongation, the dimension from the outer diameter surface of the roller 15 to the outer diameter surface of the adjacent roller 15 is j1 = j2 =
j3 = j4, and the corresponding pulse interval is also J1 =
J2 = J3 = J4.

When the chain 20 meshes with the sprocket that is driven to rotate, the pitch circle diameter of the sprocket in the initial state of the chain 20 matches the center of the roller of the meshing chain.
The center of the roller 15 of the chain 20 is rotated to be shifted to a position larger than the pitch circle diameter of the sprocket. For this reason, since the angular velocity of the sprocket driven by rotation does not change with age, even if the chain is extended, the transit time of one round of the chain between the initial state and the extended state does not change. Although the diameter of the roller 15 of the chain 20 does not change even if it is changed from the initial state of FIG. 4 to the state of abrasion and elongation of FIG. 5, the operating speed of the chain is increased by abrasion and elongation for the reasons described above. The pulse widths H1, H2, H3, and H4 in the initial state become shorter, and the pulse widths H1a, H2a, H3a, and H4a become shorter in the abraded state.

Here, since the wear amount of the diameter of the roller 15 is very small, if the chain 20 does not change even if the chain 20 is worn out, the roller center of the adjacent roller 15 supported by the outer link plate 21A in FIG. 4, the dimensions from K1 and K2 in FIG. 4 to the dimensions K1a and K2a in FIG. 5, and the dimension from the roller center of the roller 15 supported by the inner link plate 21B to the roller center is From the dimensions L1 and L2 in FIG. 4, the dimensions L1a and L2a in FIG. Also, the dimension K in FIG.
1 is the transit time F1, the dimension K2 is the transit time F2, the dimension L1 is the transit time G1, the dimension L2 is the transit time G2 in the output signal of FIG. 6, and the dimension K1a of FIG. 5 is the transit time F1a of the output signal of FIG. The dimension K2a is the transit time F2a and the dimension L
1a is the transit time G1a, and the dimension L2a is the transit time G2a. When the chain 20 is worn and stretched from the initial state, the operating speed of the chain is increased, so that the distance between the outer diameter surfaces of the adjacent rollers 15 supported by the inner link plate 21B does not change. In both cases, the transit time J2 decreases to the transit time J2a, and the transit time J4 decreases to the transit time J4a.
Since the gap from the outer diameter surface of the adjacent roller 15 supported by 1A to the outer diameter surface increases, the passage time J1 is equal to the passage time J.
1a, the passing time J3 increases to the passing time J3a. Comparing the transit times of the initial state and the abraded state by the output signals output from the chain passage detectors 12A to 12C in this manner, it was found that the initial state was supported by the outer link plate 21A for one circumference of the chain. The sum F of the pulse periods of the distance between the centers of the adjacent rollers 15 and the adjacent roller 1 supported by the inner link plate 21B.
The sum G of the pulse periods having the center-to-center dimension of 5 is expressed by the following equations (1) and (2), respectively, and the difference M is represented by F-
G, which is almost equal to zero.

F1 + F2 + F3... = F (1) G1 + G2 + G3... = G (2) On the other hand, the adjacent rollers 15 supported by the outer link plate 21A for one round of the chain in a state of abrasion and elongation.
And the sum Ga of the pulse period of the center dimension of the adjacent roller 15 supported by the inner link plate 21B is expressed by the following equations (3) and (4), respectively. And the difference Ma is Fa−
It becomes Ga.

F1a + F2a + F3a... = Fa (3) G1a + G2a + G3a... = Ga (4) Here, the difference M in the initial state becomes the difference Ma in the state of wear and elongation, and the difference Ma increases as the wear elongation increases. The difference M between the pulse period in the initial state and the difference Ma between the pulse periods in the worn and stretched state are compared, and the difference M and the difference M are calculated.
The elongation of the entire chain can be quantitatively determined based on whether or not the difference a has reached a predetermined determination value. The pulse width H1 to H4 in the initial state is different from the pulse width H1a to the pulse width H1a to H4a because the operating speed of the chain 20 is increased in the state of wear and elongation.
1b = H1−H1a, and the sum H of the pulse width in the initial state and the sum Ha of the pulse width in the state of abrasion and elongation are obtained by Expressions (5) and (6). By performing a comparison operation of Hb = H−Ha, it is possible to quantitatively determine the elongation degree of the entire chain based on whether or not the difference Hb has reached a predetermined determination value.

H = H1 + H2 + H3 + H4... + Hn (5) Ha = H1a + H2a + H3a + H4a... + Hna (6) That is, the degree of elongation of the entire chain can be determined from the change in the chain operation speed. Also, by storing this elongation degree result and calculating by dividing by the chain drive elapsed time, the elongation degree of the chain at present, the amount of elongation per unit time, and the elongation degree of the chain after several hours of chain driving can be obtained. Since it is possible to quantitatively determine and predict, it is also possible to predict the abnormal state time.

Next, a processing procedure of the elongation degree diagnosing apparatus according to the first embodiment will be described with reference to FIG.

In the first embodiment, as shown in FIG. 2, first, at step S1, one of the chains 20A to 20C for measuring and determining the elongation, that is, one of the chain passage detectors 12A to 12C. For example, the chain passage detector 12A is selected, and the rotation detector 30 detects the rotation of the drive unit 2 as a step S2, and the rotation measuring unit 29 measures the number of rotations and the rotation speed to calculate an actual measurement value. Next, in step S3, the correction unit 32
By comparing the measured values and the theoretical values of the rotation speed and the rotation speed, the speed count K is calculated. Thereafter, detection of a pulse for each link of the chain 20 selected in step S4 is started, and a pulse period for each link of the chain 20, that is, a transit time T is measured.
As 5, the pulse period for each link of the chain 20, that is, the transit time T is corrected by the correction unit 32 to a value that matches the actually measured value based on the speed coefficient K. That is, when the rotation speed and rotation speed of the driving machine 2 increase from the theoretical values for some reason, the passing time T of the chain 20 is shortened and measured as shown in FIG. . Judgment value Tbmax for judging abnormal elongation of the chain
Can be determined only on theoretical values,
The local elongation of the chain at position V cannot be diagnosed. Therefore, the correction unit 32 corrects the measured value Za for one round of the chain 20 to the measured value Zb in accordance with the case where the driving machine 2 rotates at the theoretical value based on the speed coefficient K as shown in step S5. . Next, step S
As shown in FIG. 8, it is detected whether or not there is a specific passage time exceeding the determination value Tbmax shown in FIG. 8, and the order and passage of the links detected exceeding the determination value Tbmax in step S7. The time Tas is stored. That is, as shown in FIG.
When the transit time is arranged on each link and the vertical axis represents the transit time, the determination value Tb is set to the pulse period for each link in the initial state.
Nothing exceeding max occurs. This determination value Tbma
When x exceeds this value, it is determined that the link has caused local abnormal elongation. Below this value, it is determined that the link is in a normal state.

Thereafter, it is determined whether or not the pulse period of one link measured at step S8 is an even number. At step S9, since the first detected pulse is the first, the pulse shown in FIG. The pulse cycle indicated by the time F1a is recorded as an odd-numbered passage time, and the second pulse cycle detected in step S10 is the passage time G1 in FIG.
It is recorded as an even-numbered passage time indicated by a. Next, in step S11, it is determined whether or not the number of links in one rotation of the chain being measured has been reached.
As 12, it is determined whether or not there is a passing time Tas exceeding the determination value Tbmax. If there is any,
In step S13, the passage time is detected and measured again for the link at the position Va where the passage time Tas shown in FIG. 7 has occurred.

Next, in step S14, the measurement result is compared with the judgment value Tbmax. If it is judged again that the judgment value Tbmax is exceeded as shown in FIG. It is determined that a local abnormal elongation has occurred in the link portion. Here, in order to reliably determine whether or not local elongation has occurred at the link portion at the position Va, the pulse period of the link portion can be measured a plurality of times after the detection of the position Va. Then, in step S16, the sum of the odd-numbered pulse periods for one round and the sum of the even-numbered pulse periods are calculated, and if the elongation occurs, the sum Fa of the odd-numbered pulse periods according to FIG. In addition to the expression (3), the sum Ga of the even-numbered pulse periods is also expressed by the expression (4). Then, step S
17, the sum Fa of the odd-numbered pulse periods is compared with the sum Ga of the even-numbered pulse periods. As a result, when the sum Fa of the odd-numbered pulse periods exceeds the sum Ga of the even-numbered pulse periods, In step S19, it is determined that the odd number is the pulse period of the outer link and the even number is the pulse period of the inner link. On the other hand, step S
When it is determined at 17 that the sum Ga of the even-numbered pulse periods exceeds the sum Fa of the odd-numbered pulse periods,
In step S18, it is determined that the even number is the pulse period of the outer link portion and the odd number is the pulse period of the inner link portion.

Thereafter, in step S20, the elongation rate of the entire chain is calculated from the difference between the total pulse periods of the outer link portion and the inner link portion. That is, as described above, due to the characteristics of the process of elongation of the chain, the speed increases as the chain elongates, and only the distance interval of the outer link portion increases, so that the total pulse period of the outer link portion increases, and the pulse of the inner link portion increases. The sum of the periods becomes smaller. Accordingly, the value obtained by subtracting the sum of the pulse periods of the inner link portion from the sum of the pulse periods of the outer link portion becomes large, and the elongation rate of the entire chain can be calculated in step S20.
Then, in step S21, it is determined whether the elongation rate of the entire chain has reached the use limit by comparing it with a predetermined determination value. At this time, when it is determined that the usage limit has not been reached, the prediction unit 1 is determined as step S23.
9 to predict the abnormal state time of the chain and the appropriate time for replacing the chain. At step S24, information such as the measurement result, the judgment result of the degree of prudence of the chain, the estimated time of abnormal state of the chain, the proper predicted time for replacing the chain, and the date and time of diagnosis are provided. It is stored in the storage unit 25. The information stored in the storage unit 25 is periodically transmitted from the communication unit 26 to the monitoring center 27. On the other hand, if it is determined in step S21 that the usage limit has been reached, the drive control unit 28 is executed in step S22.
And a chain exchange instruction is transmitted from the communication unit 26 to the monitoring center 27 by, for example, stopping driving.

FIG. 9 is an explanatory diagram showing a second embodiment of the chain elongation degree diagnosing device of the present invention, FIG. 10 is a flowchart showing a processing procedure of the chain elongation degree diagnosing device of FIG.
FIG. 11 is an explanatory diagram showing a measurement result of the pulse period of the chain by the chain extension degree diagnostic apparatus of FIG. In addition,
9 that are the same as those shown in FIG. 1 described above are denoted by the same reference numerals.

In the chain elongation degree diagnostic apparatus of the second embodiment, the MPU 24 calculates a speed coefficient based on the measured value of the rotation measuring section 29 and corrects the judgment value of the judging section 18 based on the speed coefficient. A portion 32a is provided.

In the second embodiment, as shown in FIG. 10, first, at step Sa1, one of the chains 20A to 20C for measuring and determining the elongation, that is, one of the chain passage detectors 12A to 12C. For example, the chain passage detector 12A is selected, and the rotation of the drive unit 2 is detected by the rotation detector 30 as step Sa2, and the rotation speed and the rotation speed are measured by the rotation measuring unit 29 to calculate the actual measurement value. Next, as step Sa3, the correction unit 32a calculates the speed coefficient K by comparing the measured value and the theoretical value of the rotation speed and the rotation speed. Thereafter, as a step Sa4, the correction unit 32a corrects the determination value Tmax for determining local abnormal elongation of the chain 20 to a value corresponding to the actually measured value based on the speed coefficient K. That is, when the rotation speed and rotation speed of the driving machine 2 increase from the theoretical values for some reason, the passage time T of the chain 20 is shortened and measured as shown in FIG. . Since the judgment value Tmax for judging the abnormal elongation of the chain can be judged only based on the theoretical value, it is impossible to diagnose the local elongation of the chain at the position W. Therefore, the correction unit 32
a corrects the determination value Tmax based on the speed coefficient K to a determination value Tamax based on the actually measured value as shown in step Sa4.

Next, as step Sa5, the detection of the pulse for each link of the selected chain 20 is started, and the pulse period for each link of the chain 20, that is, the transit time T is measured. Next, as step Sa6, local elongation has occurred and the determination value Tama shown in FIG.
Whether or not there is a specific transit time exceeding x is detected, and at step Sa7, the order of the links detected exceeding the determination value Tamax and the transit time Ts are stored. That is, as shown in FIG. 11, one round of the chain is sequentially arranged for each link on the horizontal axis, and the transit time is represented on the vertical axis. In the initial state, the pulse period for each link exceeds the determination value Tmax. Nothing happens. This judgment value Tmax is for judging that the link has caused a local abnormal elongation when it exceeds this value, and judges that the link is in a normal state below this value. Note that this determination value Tma
x is corrected to the measured value Tamax as described above, and the abnormal elongation is determined based on the measured value Tamax.

Thereafter, 1 measured as step Sa8
It is determined whether the pulse cycle of the link is an even number. Since the first pulse detected in step Sa9 is the first pulse, the pass time F1a in FIG.
Is recorded as an odd-numbered passage time, and the pulse period detected second as step Sa10 is an even-numbered passage time indicated by the passage time G1a in FIG. Record as Next, as step Sa11, it is determined whether or not the number of links in one round of the chain being measured has been reached.
After recording the results of detecting and measuring the transit time of the lap,
In step Sa12, it is determined whether or not there is a passing time Ts exceeding the determination value Tamax. If there is a corresponding one, the passage time is detected and measured again for the link at the position W where the passage time Ts shown in FIG.

Next, at step Sa14, the measurement result is compared with a judgment value Tamax. When it is judged that the judgment result exceeds the judgment value Tamax as shown by the position W in FIG. 11, the link portion is locally set at step Sa15. It is determined that abnormal abnormal elongation has occurred. Here, in order to reliably determine whether or not local elongation has occurred at the link portion at the position W, the pulse cycle of the link portion may be measured a plurality of times after the position W is detected. Thereafter, as step Sa16, the sum of the odd-numbered pulse periods for one round and the sum of the even-numbered pulse periods are calculated. If the elongation occurs, the sum Fa of the odd-numbered pulse periods according to FIG. In addition to the expression (3), the sum Ga of the even-numbered pulse periods is also expressed by the expression (4). Next, as a step Sa17, the sum Fa of the odd-numbered pulse periods is compared with the sum Ga of the even-numbered pulse periods. As a result, the sum Fa of the odd-numbered pulse periods exceeds the sum Ga of the even-numbered pulse periods. In step Sa19, it is determined that the odd number is the pulse period of the outer link portion and the even number is the pulse period of the inner link portion as step Sa19. On the other hand, if it is determined in step Sa17 that the sum Ga of the even-numbered pulse periods exceeds the sum Fa of the odd-numbered pulse periods, the process proceeds to step S17.
As a18, it is determined that the even number is the pulse period of the outer link portion and the odd number is the pulse period of the inner link portion.

Thereafter, as step Sa20, the elongation percentage of the entire chain is calculated from the difference between the total pulse periods of the outer link portion and the inner link portion. That is, as described above, due to the characteristics of the process of elongating the chain, the speed increases as the chain elongates, and only the distance interval of the outer link portion increases, so that the total pulse period of the outer link portion increases,
The sum of the pulse periods of the inner link section becomes smaller. Therefore, the value obtained by subtracting the sum of the pulse periods of the inner link portion from the sum of the pulse periods of the outer link portion becomes larger, and thus the elongation rate of the entire chain can be calculated in step Sa20. Then, in step Sa21, it is determined whether or not the elongation rate of the entire chain has reached the use limit by comparing it with a determination value. This determination value has been corrected based on the speed coefficient K.

If it is determined in step Sa21 that the usage limit has not been reached, the prediction unit 19 predicts an abnormal state time of the chain and an appropriate chain replacement time in step Sa23, and a measurement result and a chain Information such as the determination result of the degree of elongation, the predicted time of the abnormal chain state, the predicted time of proper replacement of the chain, and the date and time of performing the diagnosis are stored in the storage unit 25. The information stored in the storage unit 25 is periodically transmitted from the communication unit 26 to the monitoring center 27.
Sent to. On the other hand, if it is determined in step Sa21 that the usage limit has been reached, a control command is output to the drive control unit 28 in step Sa22, and a chain exchange instruction is transmitted from the communication unit 26 to the monitoring center 27 by stopping driving or the like. Send to

FIG. 12 is an explanatory view showing a third embodiment of the chain elongation degree diagnosing apparatus according to the present invention, and FIG. 13 is a flowchart showing a processing procedure of the chain elongation degree diagnosing apparatus of FIG. The same components as those shown in FIG. 1 are denoted by the same reference numerals.

The chain extension degree diagnosing device according to the third embodiment includes an MPU 24a having chain passage detectors 12A to 12A.
A passage measurement unit 17a that measures the pulse periods of the inner link portions and the outer link portions of the chains 20A to 20C from the 2C pulse signal, and the change and the determination value of the pulse periods of the inner link portions and the outer link portions of the chains 20A to 20C. A diagnosis unit 18a for diagnosing abnormal elongation or quantitatively determining the degree of elongation of the chains 20A to 20C, and comparing the elongation degree of the chains 20A to 20C by the evaluator 18a with, for example, the latest judgment result The amount of change is calculated, and the amount of change is divided by the elapsed time to obtain the amount of change per unit time, and a prediction is performed to predict a chain abnormality time or a chain replacement time indicating the time until the elongation of the chains 20A to 20C reaches an abnormal state. The speed coefficient is calculated by calculating the pulse period measured by the section 19a and the passage measuring section 17a, and the pulse is calculated based on the speed coefficient. And a correction unit 32b which corrects the period.

In the third embodiment, as shown in FIG. 13, first, in step S25, one of the chains 20A to 20C for measuring and determining the elongation, that is, one of the chain passage detectors 12A to 12C. For example, the chain passage detector 12A is selected, the detection of the pulse for each link of the selected chain 20 is started in step S26, and the pulse period for each link of the chain 20, that is, the transit time T is measured, and step S27 is performed. It is determined whether the detection of the pulse for each link has been performed for one rotation of the chain. Then, in step S28, each passing time T is calculated to calculate the passing time for one rotation of the chain, and in step S29, the passing time for one rotation of the chain, that is, the measured value is compared with the theoretical value by the correction unit 32b. Calculates the speed coefficient K. Thereafter, the passage time T of each link of the chain 20 is measured in step S30, and the pulse period of each link of the chain 20, that is, the passage time T is measured by the correction unit 32b based on the speed coefficient K in step S31. Correct to the combined value. That is, when the rotation speed and rotation speed of the driving machine 2 increase from the theoretical values for some reason, the passing time T of the chain 20 is shortened and measured as shown in FIG. . Since the determination value Tbmax for determining abnormal extension of the chain can be determined only based on the theoretical value, local extension of the chain at the position V cannot be diagnosed. For this reason, the correction unit 32b determines the speed coefficient K as shown in step S31.
The actual measured value Za for one rotation of the chain 20 based on the
Is corrected to the actual measurement value Zb in accordance with the case where the rotation is at the theoretical value. Next, in step S32, it is detected whether or not there is a specific passage time in which local elongation has occurred and has exceeded the determination value Tbmax shown in FIG. 8, and the link detected in step S33 has exceeded the determination value Tbmax. And the transit time Tas are stored. That is, FIG.
As shown in (1), when the circumference of the chain is sequentially arranged for each link on the horizontal axis and the transit time is represented on the vertical axis, in the initial state, no pulse cycle exceeding the determination value Tbmax occurs in the pulse cycle for each link. . This determination value Tbmax is for determining that the link has caused local abnormal elongation when it exceeds this value, and below this value, it is determined that the link is in a normal state.

Thereafter, the value measured as step S34 is 1
It is determined whether the pulse period of the link is an even number. Since the first pulse detected in step S35 is the first pulse, the pass time F1a in FIG.
Are recorded as odd-numbered passage times, and the second pulse period detected in step S36 is the even-numbered passage time indicated by the passage time G1a in FIG. Record as
Next, in step S37, it is determined whether or not the number of links in one round of the chain being measured has been reached. If the detection of the passage time of one round of the chain and the recording of the measurement result have been completed, the determination value Tbmax is exceeded in step S38. Transit time Ta
Determine if there is s. If there is a corresponding one, the passage time is detected again and measured for the link at the position Va where the passage time Ts shown in FIG.

Next, in step S40, the measurement result is compared with the judgment value Tbmax, and if it is judged again that the position exceeds the judgment value Tbmax as shown in FIG. It is determined that a local abnormal elongation has occurred in the link portion. Here, in order to reliably determine whether or not local elongation has occurred at the link portion at the position Va, the pulse period of the link portion can be measured a plurality of times after the detection of the position Va. Thereafter, in step S42, the sum of the odd-numbered pulse periods for one round and the sum of the even-numbered pulse periods are calculated. If the elongation occurs, the total sum Fa of the odd-numbered pulse periods according to FIG. In addition to the expression (3), the sum Ga of the even-numbered pulse periods is also expressed by the expression (4). Then, step S
43, the sum Fa of the odd-numbered pulse periods is compared with the sum Ga of the even-numbered pulse periods. As a result, when the sum Fa of the odd-numbered pulse periods exceeds the sum Ga of the even-numbered pulse periods, In step S45, it is determined that the odd number is the pulse period of the outer link unit and the even number is the pulse period of the inner link unit. On the other hand, step S
When it is determined at 43 that the sum Ga of the even-numbered pulse periods exceeds the sum Fa of the odd-numbered pulse periods,
In step S44, it is determined that the even number is the pulse period of the outer link portion and the odd number is the pulse period of the inner link portion.

Thereafter, in step S46, the elongation ratio of the entire chain is calculated from the difference between the pulse periods of the outer link portion and the inner link portion. That is, as described above, due to the characteristics of the process of elongation of the chain, the speed increases as the chain elongates, and only the distance interval of the outer link portion increases, so that the total pulse period of the outer link portion increases, and the pulse of the inner link portion increases. The sum of the periods becomes smaller. Accordingly, the value obtained by subtracting the sum of the pulse periods of the inner link portion from the sum of the pulse periods of the outer link portion becomes large, and the elongation rate of the entire chain can be calculated in step S46.
Then, in step S47, it is determined whether the elongation rate of the entire chain has reached the use limit by comparing it with a predetermined determination value. At this time, when it is determined that the usage limit has not been reached, the prediction unit 1 is determined as step S49.
9a predicts the abnormal time of the chain and the proper time of replacing the chain, and as a step S50, the measurement result, the judgment result of the degree of caution of the chain, the predicted time of the abnormal chain state,
Information such as a chain replacement appropriate prediction time and a diagnosis execution date and time is stored in the storage unit 25. The information stored in the storage unit 25 is periodically transmitted from the communication unit 26 to the monitoring center 27. On the other hand, if it is determined in step S47 that the usage limit has been reached, the process proceeds to step S48 where the drive control unit 2
A control command is output to the communication unit 8 and a chain exchange instruction is transmitted from the communication unit 26 to the monitoring center 27 by, for example, stopping driving.

FIG. 14 is an explanatory diagram showing a fourth embodiment of the chain elongation degree diagnosing device of the present invention, and FIG. 15 is a flowchart showing the processing procedure of the chain elongation degree diagnosing device of FIG. The same components as those shown in FIG. 12 are denoted by the same reference numerals.

In the chain elongation degree diagnosing apparatus of the fourth embodiment, the MPU 24a calculates the speed factor by calculating the pulse period measured by the passage measuring unit 17a, and determines the speed factor by the determining unit 18a based on the speed factor. A correction unit 32c for correcting a value is provided.

In the fourth embodiment, as shown in FIG. 15, first, in step Sa25, one of the chains 20A to 20C for measuring and determining the elongation, that is, one of the chain passage detectors 12A to 12C. For example, the chain passage detector 12A is selected, and the detection of the pulse for each link of the selected chain 20 is started in step Sa26, and the pulse period for each link of the chain 20, that is, the transit time T is measured. The detection of the pulse for each link is performed for one rotation of the chain,
Determine if you have gone. Then, step Sa28
Is calculated as the transit time T for one round of the chain, and the correction unit 3 is performed as step Sa29.
The speed coefficient K is calculated by comparing the passage time for one round of the chain, that is, the measured value with the theoretical value by 2c. Thereafter, in step Sa30, the correction unit 32c corrects Tmax for determining local abnormal elongation of the chain 20 based on the speed coefficient K to a value corresponding to the actually measured value. That is, when the rotation speed and the rotation speed of the driving machine 2 increase from the theoretical values for some reason, the passing time T of the chain 20 is shortened and measured as shown in FIG. Would. Since the judgment value Tmax for judging the abnormal elongation of the chain can be judged only based on the theoretical value, it is impossible to diagnose the local elongation of the chain at the position W. For this reason, the correction unit 32c changes the determination value Tmax based on the speed coefficient K to the determination value Tama based on the actually measured value as shown in step Sa30.
x is corrected.

Next, as step Sa31, the passage time T of each link of the chain 20 is measured, and step Sa31 is performed.
As shown in FIG.
In step Sa33, it is determined whether there is a specific transit time exceeding the determination value Tamax, and the order of the links detected exceeding the determination value Tamax and the transit time Ts are stored in step Sa33. That is, as shown in FIG. 11, one round of the chain is sequentially arranged for each link on the horizontal axis, and the transit time is represented on the vertical axis. In the initial state, the pulse period for each link exceeds the determination value Tmax. Nothing happens. This judgment value Tmax is for judging that the link has caused a local abnormal elongation when it exceeds this value, and judges that the link is in a normal state below this value.
Note that this determination value Tmax is the actual measurement value Ta as described above.
The abnormal elongation is determined based on the actual measurement value Tamax.

Thereafter, it is determined whether or not the pulse period of one link measured at step Sa34 is an even-numbered pulse. At step Sa35, the pulse detected first is the first pulse. Time F1
The pulse cycle indicated by a is recorded as the odd-numbered passage time, and the pulse cycle detected second at step Sa36 is the even-numbered passage time indicated by the passage time G1a in FIG. Record as time. Next, in step Sa37, it is determined whether or not the number of links in one rotation of the chain being measured has been reached.
After recording the results of detecting and measuring the transit time of the lap,
In step Sa38, it is determined whether or not there is a passing time Ts exceeding the determination value Tamax. If there is a corresponding one, the passage time is detected and measured again for the link at the position W where the passage time Ts shown in FIG.

Next, at step Sa40, the measurement result is compared with the judgment value Tamax, and when it is judged that the judgment result exceeds the judgment value Tamax as shown by the position W in FIG. 11, the link portion is locally set at step Sa41. It is determined that abnormal abnormal elongation has occurred. Here, in order to reliably determine whether or not local elongation has occurred at the link portion at the position W, the pulse cycle of the link portion may be measured a plurality of times after the position W is detected. Then, as step Sa42, the sum of the odd-numbered pulse periods for one round and the sum of the even-numbered pulse periods are calculated. If the elongation occurs, the sum Fa of the odd-numbered pulse periods according to FIG. In addition to the expression (3), the sum Ga of the even-numbered pulse periods is also expressed by the expression (4). Next, as a step Sa43, the sum Fa of the odd-numbered pulse periods is compared with the sum Ga of the even-numbered pulse periods. As a result, the sum Fa of the odd-numbered pulse periods exceeds the sum Ga of the even-numbered pulse periods. If so, it is determined in step Sa45 that the odd number is the pulse period of the outer link portion and the even number is the pulse period of the inner link portion. On the other hand, if it is determined in step Sa43 that the sum Ga of the even-numbered pulse periods exceeds the sum Fa of the odd-numbered pulse periods, the process proceeds to step S43.
As a44, it is determined that the even number is the pulse period of the outer link portion and the odd number is the pulse period of the inner link portion.

Thereafter, as step Sa46, the elongation percentage of the entire chain is calculated from the difference between the total pulse periods of the outer link portion and the inner link portion. That is, as described above, due to the characteristics of the process of elongating the chain, the speed increases as the chain elongates, and only the distance interval of the outer link portion increases, so that the total pulse period of the outer link portion increases,
The sum of the pulse periods of the inner link section becomes smaller. Therefore, the value obtained by subtracting the sum of the pulse periods of the inner link portion from the sum of the pulse periods of the outer link portion becomes larger, and thus the elongation rate of the entire chain can be calculated in this step Sa46. Then, as step Sa47, it is determined whether or not the elongation rate of the entire chain has reached the use limit by comparing it with a determination value. This determination value has been corrected based on the speed coefficient K.

If it is determined in step Sa47 that the usage limit has not been reached, the predicting section 19a predicts an abnormal state of the chain or an appropriate chain replacement time in step Sa49. Information such as the determination result of the degree of elongation, the predicted time of the abnormal chain state, the predicted time of proper replacement of the chain, and the date and time of performing the diagnosis are stored in the storage unit 25. The information stored in the storage unit 25 is periodically transmitted from the communication unit 26 to the monitoring center 27.
Sent to. On the other hand, if it is determined in step Sa47 that the usage limit has been reached, a control command is output to the drive control unit 28 in step Sa48, and a chain exchange instruction is transmitted from the communication unit 26 to the monitoring center 27 by stopping driving or the like. Send to

In the first to fourth embodiments configured as described above, the chain passage detectors 12A to 12C are provided, and the abnormal extension of the chains 20A to 20C is performed based on the change in the pulse period directly detected from the chains 20A to 20C. Does not require the marking of the chain as in the prior art, so that the chains 20A-2A
The extension degree of OC can be diagnosed. In addition, irregular chain 2
Even if there is a change in the moving speed from 0A to 20C, the correction units 32 to 3 are changed according to the change in the speed of the chains 20A to 20C.
Since the pulse period or the determination value is corrected by 2c, the elongation degree of the chains 20A to 20C can be diagnosed more accurately. Furthermore, the chain 2 can be used without any maintenance personnel.
Periodic measurement can be performed from the start time of 0A to 20C to predict abnormal expansion, and inspection and adjustment work can be performed at an appropriate time. Furthermore, by predicting abnormal elongation of the chains 20A to 20C, occurrence of an abnormality can be prevented beforehand, and reliability of the escalator can be improved. Further, since the operation stop time for maintenance and inspection can be reduced, the serviceability can be improved.

In the above-described embodiment, the degree of chain elongation is calculated from the pulse period for one round of the chain. However, the present invention is not limited to this, and the elongation of the chain is calculated from the pulse period for each predetermined section. The degree may be calculated. Also, an escalator has been exemplified as a transport device,
The present invention can be similarly applied to a moving walkway, an automatic line, and other transfer devices as long as they use a chain.

[0061]

Since the present invention is constructed as described above, it is not necessary to provide a label on the chain as in the prior art, since the abnormal elongation of the chain is diagnosed from the change in the pulse period detected directly from the chain. Thus, the degree of chain elongation can be accurately diagnosed. In addition, even if there is an irregular change in the moving speed of the chain, the correction unit corrects the pulse period or the determination value as a diagnostic element of the degree of elongation in accordance with the change in the speed of the chain, so that the chain can be more accurately adjusted. The degree of elongation can be diagnosed. Therefore, it is possible to perform inspection and adjustment work at an appropriate time, and it is possible to prevent the device from becoming inoperable due to an abnormality.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of a chain elongation diagnostic device of the present invention.

FIG. 2 is a flowchart showing a processing procedure of the chain elongation degree diagnostic apparatus of FIG. 1;

FIG. 3 is a cross-sectional view of the chain as viewed from the center to the outside.

FIG. 4 is a sectional view showing an initial state of the chain and taken along line PP of FIG. 3;

5 is a cross-sectional view showing a chain that has been worn and stretched and is taken along line PP of FIG. 3;

FIG. 6 is a waveform diagram of an output signal output when a chain in an initial state is detected.

FIG. 7 is a waveform diagram of an output signal output when a chain that has been worn and stretched is detected.

FIG. 8 is an explanatory diagram showing a measurement result of a pulse period of a chain by the chain extension degree diagnosing device of FIG. 1;

FIG. 9 is an explanatory view showing a second embodiment of the chain extension degree diagnosing device of the present invention.

10 is a flowchart showing a processing procedure of the chain elongation degree diagnostic apparatus of FIG. 9;

11 is an explanatory diagram showing a measurement result of a pulse period of a chain by the chain elongation degree diagnostic apparatus of FIG. 9;

FIG. 12 is an explanatory view showing a third embodiment of a chain elongation diagnostic device of the present invention.

FIG. 13 is a flowchart showing a processing procedure of the chain elongation degree diagnostic apparatus of FIG. 12;

FIG. 14 is an explanatory view showing a fourth embodiment of a chain elongation diagnostic device of the present invention.

FIG. 15 is a flowchart showing a processing procedure of the chain extension degree diagnosing device of FIG. 14;

[Explanation of symbols]

 2 Drive unit 12A to 12C Passage detector 16 Switching unit 17, 17a Passage measurement unit 18, 18a Judgment unit 19, 19a Prediction unit 20A to 20C Chain 24, 24a MPU 25 Storage unit 26 Communication unit 27 Monitoring center 28 Drive control unit 29 Rotation measurement unit 30 Rotation detector 32, 32a, 32b, 32c Correction unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomoya Takei 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo, Japan Inside the Hitachi Building System Co., Ltd. (72) Inventor Kenyuki Abe 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo, Japan Inside the Hitachi Building System, Ltd. (72) Inventor Kyoya Asaki 1-6-6 Kanda Nishikicho, Chiyoda-ku, Tokyo, Ltd. Inside the Hitachi Building System (72) Yoshio Matsuzaki 1-6-6 Kanda Nishikicho, Chiyoda-ku, Tokyo, Ltd. F-term in Hitachi Building Systems, Ltd. (reference) 2F069 AA24 AA68 AA99 BB29 BB34 CC09 CC10 DD15 DD25 EE20 GG04 GG62 HH07 HH15 HH30 3F321 EA14 EB08 EC11 HA04 3J049 AA08 BG06 CA08 CA10

Claims (4)

[Claims] 1. A chain elongation diagnostic device provided in a transport device for driving a chain via a driving machine and diagnosing the elongation of the chain, wherein a passage of an inner link portion and an outer link portion of the chain is detected. A pass detector, a pass measurement unit that measures a pulse period of an inner link portion and an outer link portion of the chain by a pulse signal output from the pass detector, and a pulse of an inner link portion and an outer link portion of the chain. A determining unit that determines abnormal elongation of the chain based on a change in a cycle and a determination value; a rotation detector that detects rotation of a rotating shaft provided in the driving device; and an output signal output from the rotation detector. A rotation measuring unit that measures the number of rotations and the rotating speed of the rotating shaft for a certain period of time, and a speed coefficient is calculated based on the measured value of the rotation measuring unit, Chain elongation diagnostic apparatus characterized by comprising a correction section that corrects the pulse period based on the time factor. 2. A chain extension diagnostic device provided in a transport device for driving a chain via a driving machine and diagnosing the extension of the chain, wherein a passage of an inner link portion and an outer link portion of the chain is detected. A pass detector, a pass measurement unit that measures a pulse period of an inner link portion and an outer link portion of the chain by a pulse signal output from the pass detector, and a pulse of an inner link portion and an outer link portion of the chain. A determining unit that determines abnormal elongation of the chain based on a change in a cycle and a determination value; a rotation detector that detects rotation of a rotating shaft provided in the driving device; and an output signal output from the rotation detector. A rotation measuring unit that measures the number of rotations and the rotating speed of the rotating shaft for a certain period of time, and a speed coefficient is calculated based on the measured value of the rotation measuring unit, Chain elongation diagnostic apparatus characterized by comprising a correction unit for correcting the determination value based on the degree coefficient. 3. A chain elongation diagnostic device provided in a transport device for driving a chain via a driving machine and diagnosing the elongation of the chain, wherein a passage of an inner link portion and an outer link portion of the chain is detected. A pass detector, a pass measurement unit that measures a pulse period of an inner link portion and an outer link portion of the chain by a pulse signal output from the pass detector, and a pulse of an inner link portion and an outer link portion of the chain. A determination unit that determines abnormal elongation of the chain based on a change in period and a determination value, and calculates a speed coefficient by calculating a pulse period measured by the passage measurement unit, and corrects the pulse period based on the speed coefficient. A chain extension diagnostic device, comprising: 4. A chain extension diagnostic device provided in a transport device for driving a chain via a driving machine and diagnosing the extension of the chain, wherein a passage of an inner link portion and an outer link portion of the chain is detected. A pass detector, a pass measurement unit that measures a pulse period of an inner link portion and an outer link portion of the chain by a pulse signal output from the pass detector, and a pulse of an inner link portion and an outer link portion of the chain. A determination unit that determines abnormal elongation of the chain based on a change in period and a determination value, and calculates a speed coefficient by calculating a pulse period measured by the passage measurement unit, and corrects the determination value based on the speed coefficient. A chain extension diagnostic device, comprising: