JP2003237919A - Device and method for diagnosing abnormality of air pallet carrier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormality diagnosing device of an air pallet carrier which estimates a cause when the quantity of compressed air to be supplied to a diaphragm is abnormally increased. <P>SOLUTION: In the air pallet carrier in which compressed air is supplied in a diaphragm fitted to a lower side of a frame and having air outlets, an air film is formed between the diaphragm and a floor surface by the air blown out of the air outlets, and a heavy article loaded on the frame is carried together with the frame, an abnormality diagnosing device thereof comprises a plurality of microphones #1 to #n disposed on a peripheral part of the diaphragm, and a control unit 41 to determine the state of air leakage from the detection data of the microphones #1 to #n. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abnormality diagnosing apparatus and an abnormality diagnosing apparatus for an air pallet conveying apparatus that conveys heavy objects by forming an air film between a diaphragm and a floor surface to reduce the coefficient of friction. It is about the method.

[0002]

2. Description of the Related Art Conventionally, an air pallet transfer for supplying a buoyant force by supplying compressed air between a diaphragm provided on the lower surface of an air pallet and a floor surface to transfer a heavy load placed on the air pallet. The device has been put to practical use. Less than,
The structure and principle of the conventional air pallet transfer device will be briefly described with reference to FIG. In the figure, reference numeral 1 is a frame, 2 is a diaphragm, 3 is a transfer floor surface, 4
Is an air film, and 5 is an air pallet carrier.

The air pallet transfer device 5 has a substantially ring-shaped diaphragm 2 mounted on the lower surface of the frame 1 and having an air outlet 2a. The diaphragm 2 is supplied with air pressurized inside from a compressor (not shown) or the like, and is pressurized by the air blown out from the air blowout holes 2a appropriately arranged over the entire circumference, so that the diaphragm 2 and the transfer bed are conveyed. A thin arrow (0.2) between surface 3 and
The air film 4 is formed. As a result,
Since the pressure zone P having a pressure higher than the atmospheric pressure is formed inside the diaphragm 2, the product of the pressure receiving area and the pressure in the pressure zone P serves as buoyancy and acts on the frame 1 to load it on the frame 1. The heavy object can be floated and carried along with the frame 1.

When pressurized air is supplied into the diaphragm 2 to levitate the air pallet transfer device 5, the air film 4
The friction coefficient with the transfer floor surface 3 is about 3/100
It becomes as small as 0. Therefore, the air pallet transfer device 5 can be freely moved on the transfer floor surface 3 with a very small force. Further, since the direct contact with the transfer floor surface 3 is avoided and the damage to the transfer floor surface 3 is eliminated, the air pallet transfer device 5 is applied in many cases especially for the transfer of heavy objects.

As described above, the air pallet transfer device 5
Forms a thin air film 4 between the diaphragm 2 and the floor surface 3 and conveys heavy objects with a slight force due to the lubrication effect of air. Need to be formed. Further, even if there is an obstacle such as a slight waviness, a seam (step), and a foreign substance on the conveyance floor surface 3, the conveyance movement is possible although the traveling resistance is increased.

Further, since the air pallet transfer device 5 has a very small frictional force in a floating state, it easily moves even if the transfer floor surface 3 has a slight inclination or inclination. For this reason, in order to prevent unintended movement and ensure safety, it is necessary to instantaneously cut off the supply of compressed air and to provide a stopper 6 to prevent movement outside the movement region. In this stopper 6, for example, as shown in FIG. 11, the transfer floor surface 3 of a predetermined transfer path 7 is set lower than the general floor surface 8 so that the air pallet transfer device 5 can exit from the transfer path 7. Some have steps so that they do not exist. The arrow indicated by reference numeral 9 in the drawing indicates the carrying direction of the air pallet carrying device 5.

[0007]

Since the above-mentioned conventional air pallet conveying device constantly supplies pressurized air in a stable manner, there are some obstacles (waviness, seams, steps, small foreign matters, etc.) on the floor surface. However, although the running resistance may increase, the vehicle can run sufficiently. However, when the obstacle on the floor becomes large, the area formed between the diaphragm and the floor becomes large due to the influence. Therefore, compared to the case where the air film is normally formed, the amount of leakage of the pressurized air becomes large, and as a result, sufficient buoyancy and air lubrication effect cannot be obtained,
It may be impossible to drive.

As described above, the maintenance of the air film is the most important issue for the air pallet transport device, but there is no way to check this state, and this is a major problem particularly in realizing automation. In other words, just by monitoring and checking the amount of pressurized air supplied to the diaphragm, it is not possible to accurately grasp where and what state it is in even if the amount of air supply increases abnormally. Specifically,
In reality, it is not possible to estimate whether there is an increase in the amount of leakage due to an abnormality on the floor surface side or an increase in the amount of leakage due to an abnormality such as damage to the diaphragm.

The present invention has been made in view of the above circumstances, and provides an abnormality diagnosing apparatus and an abnormality diagnosing method for an air pallet transporting apparatus for estimating the cause when the amount of pressurized air supplied to the diaphragm abnormally increases. It is intended to be provided.

[0010]

The present invention adopts the following means in order to solve the above problems. The abnormality diagnosing device for an air pallet conveying device according to claim 1, which is attached to a lower surface of a frame and supplies pressurized air into a diaphragm having an air blowing hole, and is blown out from the air outlet. An air film is formed between the diaphragm and the floor surface by air, which is provided in an abnormality diagnosing device of an air pallet conveying device that conveys a heavy load loaded on the frame together with the frame, and is provided in the peripheral portion of the diaphragm. The present invention is characterized in that a plurality of arranged air leakage status detecting means and a control section for judging the state of air leakage from the detection data of each air leakage status detecting means are provided.

According to such an abnormality diagnosing device for an air pallet transporting device, a plurality of air leak condition detecting means arranged around the diaphragm and the air leak condition are judged from the detection data of each air leak condition detecting means. Since the control unit is configured to include the air leak, the air leak situation is judged from the position of the air leak situation detection means that has detected the strongest air leak among the plurality of air leak situation detecting means. be able to.

In the abnormality diagnosing device for an air pallet conveying device according to claim 1, the air leak condition detecting means comprises:
It may be one that detects the sound generated by air leakage, or one that detects the flow of air generated by air leakage.

According to a fourth aspect of the present invention, there is provided a method of diagnosing an abnormality in an air pallet transporting apparatus, wherein pressurized air is supplied into a diaphragm mounted on the lower surface of a frame and having an air blowout hole, and blown out from the air blowout port. A method for diagnosing an abnormality in an air pallet transporting device for transporting a heavy load loaded on the frame together with a frame by forming an air film between the diaphragm and the floor surface by the stored air, the method comprising: Air leak status is detected by multiple air leak status detectors installed in each section, and the detection data of each air leak status detector is input to the control unit to detect a large leak status. It is characterized by judging the situation of.

According to such an abnormality diagnosing method for the air pallet transporting device, the air leak situation detecting means arranged in the peripheral portion of the diaphragm detects the air leak situation, and the detection data of each air leak situation detecting means is obtained. The state of air leakage is judged from the change of the air leak detecting means which is inputted to the control unit and detects a large leak state, and therefore, in addition to the judgment of the occurrence of air leakage, The state of air leakage can be judged from the change in the detected largest air leakage state.

In the abnormality diagnosing method according to claim 4,
If the air leak detection means that detects a large air leak situation is fluctuating in the specified direction of movement, it is determined that there is an abnormality on the floor side, and the air leak detection means that detected a large air leak situation fluctuates. If there is not, it is characterized that it is judged that there is an abnormality on the diaphragm side. Further, in the above-described abnormality diagnosis method, the air leak status detecting means may detect a sound generated by the air leak, or may detect an air flow generated by the air leak.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an air pallet conveying device abnormality diagnosing device and an abnormality diagnosing method according to the present invention will be described below with reference to the drawings. First, a configuration example of the air pallet transfer device will be described with reference to FIGS. 5 and 6. In the figure, reference numeral 10 is an air pallet transfer device, 11 is a frame, 12 is a diaphragm, 13 is a transfer floor surface, 14 is an air film, 15 is an arrow indicating the transfer movement direction, and 20 is a foreign matter suction / transfer stop device. is there.

In the illustrated air pallet transfer device 10, four diaphragms 12 are provided on the lower surface of a frame 11 on which heavy objects are loaded. Each of the diaphragms 12 receives the supply of compressed air from an air supply source (not shown) such as a compressor, and blows the pressurized air into the pressure zone P from an air outlet hole (not shown). It has become. In addition, a large number of air blowout holes are arranged at appropriate places over the entire circumference of the diaphragm 12, and a space region surrounded by the diaphragm 12 on the lower surface of the frame 11 and the transfer floor surface 13 has a pressure zone P higher than the surrounding atmospheric pressure. Becomes

The pressurized air blown into the pressure zone P is
A thin air film 14 indicated by an arrow is formed between the diaphragm 12 and the transfer floor surface 13 and flows out. As a result, the friction coefficient between the diaphragm 12 and the transfer floor surface 13 decreases to about 3/1000 due to the lubricating effect of air. Further, since the product of the pressure in the pressure zone P and the pressure receiving area serves as buoyancy, which acts to levitate the frame 11 from the transport floor surface 13, the heavy load loaded on the frame 11 is transported with a small force. It will be possible. In the example shown, 4
The reason why the two diaphragms 12 are used is to obtain a large buoyancy, and the number and size of the diaphragms 12 may be appropriately selected according to the heavy object to be transported.

In the air pallet transfer device 10 described above,
By detecting the occurrence of air leakage, the air film 1
An abnormality diagnosing device for diagnosing the situation of the diaphragm 4 and the diaphragm 12 is provided. Hereinafter, the abnormality diagnosing device and the abnormality diagnosing method of the air pallet conveying device 10 will be described with reference to FIGS.
It will be described based on. In the figure, reference numeral 40 is an abnormality diagnosing device, 41 is a control unit, and # 1 to #n are microphones that serve as air leak status detecting means.

As shown in FIGS. 2 and 3, for example, the abnormality diagnosis device 40 has a plurality of air leak detection means (eight in the illustrated example, # 1 to # 8) around the diaphragm 12.
It is provided with the arranged microphones #i and a control unit 41 for judging the state of air leakage from the detection data of each microphone #i. 2 and 3, microphones # 1 to # 8 are arranged around the diaphragm 12 at equal pitches on the same circumference. These microphones # 1 to # 8 are preferably those having a strong directivity, and each has a diaphragm 1
The state of air leakage that occurs around 2, that is, the sound of air leakage is detected and input to the control unit 41. The number of microphones # 1 to # 8 is not limited to the illustrated embodiment, but can be changed appropriately from # 1 to #n.

Further, reference numeral 50 in FIG. 2 indicates a foreign matter, and reference numeral 51 in FIG. 3 indicates a step. The obstacles such as the foreign matter 50 and the step (or joint) 51 are the diaphragm 12 and the transfer floor surface 13. If there is a hole between the diaphragm 12 and the diaphragm 12,
An air leak sound "Pee" is generated. Since the workers are running side by side in the conventional transfer movement, it is possible to take an appropriate action by hearing this voice. In addition, normal air film 1
When No. 4 is formed, the beeping sound is not generated, and thus the traveling movement can be continued with peace of mind.

The control unit 41 uses the above-mentioned microphones # 1 to # 8.
In addition to the detected value of (n), the data signal of the pressurized air supply amount 42 supplied to the diaphragm 12 is input, and
The diagnosis result 43 is output according to the flowchart shown in FIG. When starting in step 1 (hereinafter abbreviated as "S1"), in S2, the leak sound of the pressurized air detected by the microphones # 1 to #n is detected and input to the control unit 41.

In S3, of the microphones # 1 to #n, the microphone #i that has detected the highest leakage sound is determined. In response to this result, in S4, it is determined whether or not the microphone that detects the highest leak sound changes with time. That is, it is determined whether or not the position where the leak sound is generated changes with the movement of the air pallet transport device 10.

If the microphone #i that has detected the highest leak sound changes with time according to the determination in S4, "YE
It progresses to S5 of "S" and judges that it is an abnormality on the floor side. That is, it is determined that the foreign matter 50, the step 51, and the like are present on the transfer floor surface 13, and there is an abnormality on the transfer floor surface 13 side. As a specific example, as shown in FIG. 2, for example, when the dot-shaped foreign matter 50 exists in the state of being fixed on the transport path 13, the microphone # 2 closest to the foreign matter 50 is the most. Detects loud leaks. Then, as the air pallet transport device 10 moves, the microphone # 2 that has detected the largest leak sound moves away from the foreign matter 50. Therefore, the largest leak sound is detected by the microphone # 3 approaching the foreign matter 50 and It changes to Mike # 4.

However, as shown in FIG. 3, for example, when a linear step 51 exists on the conveyance path 13, the two microphones # 1 and # 2 located closest to each other have the largest leakage. As the sound is detected and the air pallet transport device 10 moves, the largest leak sound changes to the microphone # 3 or the microphone # 4.

On the other hand, if it is determined in S4 that the microphone #i that has detected the highest leak sound does not change with time,
It proceeds to "NO" S6 and determines that the diaphragm 12 is damaged. In other words, if the pressurized air leaks due to the holes in the diaphragm 12, no matter how much the air pallet transfer device 10 moves, the position of the holes in the diaphragm 12 and the microphone #i may be different. Since the positional relationship is constant, in other words, the microphone #i closest to the hole of the diaphragm 12 is constant, it is determined that the diaphragm 12 side is abnormal (damaged), not the conveyance floor 13 side. It It should be noted that if the foreign matter 50 is not fixed to the transfer floor surface 13, the foreign matter 50 may move integrally with the movement of the air pallet transfer device 10, but such a movement does not last so long. Since the microphone #i that detects the highest leak sound changes, it is possible to distinguish it from the damage of the diaphragm 12 by appropriately setting the determination time.

By detecting the above-mentioned leakage sound, the transfer floor surface 1
If an abnormality on the 3 side or the diaphragm 12 side is detected,
For example, during the automatic conveyance, the supply of the pressurized air is stopped as necessary, or the supply of the pressurized air is stopped and the foreign matter suction / conveyance stop device 20 described later is operated,
Since it becomes possible to stop the transportation movement of the air pallet transportation apparatus 10, it is effective in automating the transportation movement. In addition, even in the case of manual transportation, it is possible to use it with peace of mind by knowing the situation of air leakage.
If the correlation between the volume of the air leakage sound and the air leakage amount is input in advance, it is possible to quantitatively determine the air leakage situation.

Next, another embodiment of the air leakage status detecting means will be described. In the above-described embodiment, the microphones # 1 to # 1
Although the sound generated by the air leak is detected by using #n, it is possible to detect the state of the flow of the air leak by swinging the ribbon or the like in addition to such sound. In this case, members easily swinging by the air flow, such as ribbons, are arranged around the diaphragm 12 at equal pitches, and the swinging state that changes depending on the presence or absence of air leakage and the amount of air leakage is processed by image processing. It is also possible to detect and detect the state of air leakage from the position of the ribbon that swings most and the degree of swing.

As shown in FIGS. 5 and 6, the air pallet transfer device 10 is provided with foreign matter suction / transfer stop devices 20 at both ends in the transfer movement direction indicated by arrow 15. This foreign matter suction / transport stop device 20 is used for transport floor 13
This is an apparatus in which a floor suction type cleaning means for sucking and removing foreign matter on the top and a sheet material supplying means for forming an air outflow passage are integrated.

An example of the construction of the foreign matter suction / transport stop device 20 will be described below with reference to FIG. The foreign matter suction / conveyance stopping device 20 accommodates a drum 22 rotatably supported in the center of a cylindrical casing 21. In the vicinity of the lower end surface of the casing 21 fixed to the frame 11, a suction port 23 for sucking foreign matter from the transport floor surface 13 is opened, and the foreign matter adhered to the transport floor surface 13 is forcibly peeled off. A brush 24 that can be used is provided.

The suction port 23 is provided with a suction flow path 25 formed on the one end side in the casing 21 over a substantially half circumference,
It is in communication with a suction device 26 including a suction fan (not shown) and a driving means thereof (such as an air motor or an electric motor). The suction device 26 is like a so-called vacuum cleaner, and forms a negative pressure in the suction port 23, and sucks foreign matter from the conveyance floor surface 13 through a path indicated by an arrow 27. That is, the suction device 26 constitutes a floor suction type cleaning means together with the suction port 23 and the suction flow path 25. The cleaning unit and the sheet material supply unit may be integrated as in the foreign matter suction / conveyance stopping device 20 described above, or may be configured separately.

By providing such floor surface suction type cleaning means, when foreign matter is present on the transfer floor surface 13 on which the air pallet transfer device 10 is moving, the suction port before the diaphragm 12 passes. It is possible to surely suck and remove from 23. For this reason, it is possible to prevent the situation in which foreign matter exists between the diaphragm 12 and the transfer floor surface 13 without causing the worker to run side by side, so that the formation of the normal air film 14 is hindered by the foreign matter being caught. There is no.
That is, due to the presence of foreign matter, the gap between the diaphragm 12 and the transfer floor surface 13 becomes abnormally large, and a larger flow rate of air leakage is generated from this gap than when the normal air film 14 is formed. You will not lose sufficient buoyancy.

The brush 2 provided around the suction port 23
By the action of 4, the foreign matter adhering to the conveyance floor surface 13 is forcibly peeled off, and then the suction port 2 is sucked by the suction device 26 described above.
It is also possible to suck and remove from 3. The suction device 26 is preferably one that can reliably store the sucked foreign matter.

Next, the sheet material supplying means for inserting the sheet material 30 between the diaphragm 12 and the transfer floor surface 13 to intentionally form the air outflow passage will be described. This supply means is integrally incorporated in the foreign matter suction / transport stop device 20 described above, and when the air pallet transport device 10 escapes, it causes pressurized air to flow out from the pressure zone P to stop it immediately. Is.

As the sheet material 30, for example, as shown in FIG. 8A, a sheet made of metal, plastic, or the like is molded into a thin corrugated sheet shape. This sheet material 30 is stored in a state of being wound up in the drum 22 (see FIG. 7) during normal transport movement, and one end thereof is fixed to the drum 22.
The other end is in a state of slightly protruding from the sheet material outlet 31 opening to the casing 21. The drum 22 is rotatable, and is made of a sheet material 30 by a spring (not shown), for example.
Is urged in the unwinding direction (clockwise in the case of FIG. 7). The drum 22 is rotated together with the sheet material 30 to the storage position in FIG. 7 against the bias of the spring, and is held by an appropriate stopper (not shown).

When the air pallet transport device 10 floats up with the sheet material 30 being wound in the drum 22 of the foreign matter suction / transport stop device 20 and starts an uncontrollable escape for some reason, or during normal transport movement. When an emergency stop is required, the supply of pressurized air is stopped and the sheet material 30 is unwound to unfold the diaphragm 12 and the transfer floor surface 13.
Insert between and. Such unwinding of the sheet material 30 is achieved by operating the stopper described above to release the drum 22 from the state in which the drum 22 is held at the storage position, and rotating the drum 22 clockwise by the bias of the spring. . As a result, the sheet material 30 is unwound from the sheet material outlet 31 and spreads on the conveying floor surface 13, so that the diaphragm 12 that has been conveyed and moved passes the upper surface of the sheet material 30,
A sheet material 30 is provided between the diaphragm 12 and the transfer floor surface 13.
Sandwich.

Then, since the sheet material 30 has a corrugated plate shape, the unevenness serves as an air outflow passage, and the pressurized air flows out from the inside of the high pressure zone P to the outside of the diaphragm at atmospheric pressure. When only one surface is corrugated as in the sheet material 30 shown in FIG. 8A, it is preferable to use the corrugated surface having irregularities in contact with the conveyance floor surface 13. The flow path can be formed efficiently, and since the diaphragm 12 is in contact with the flat surface, there is no risk of damage. In the case of the sheet material 30 shown in FIG. 8A, the pressurized air will flow in the front and back directions of the paper surface.

Further, the unwinding of the above-mentioned sheet material 30 has been described as using a spring or a stopper, but a configuration using an actuator such as an air motor or an electric motor is also possible.

The sheet material 30 is shown in FIG.
The present invention is not limited to that shown in (a), and various modifications are possible. The first modified example shown in FIG. 8B is a corrugated sheet material 30A having irregularities on both sides. Even in this case, an air outflow passage similar to that of the above-mentioned sheet material 30 can be formed.

The second modified example shown in FIG. 9A is a sheet material 30B having a large number of punch holes 30a. The punch hole 30a in this case is a hole longer in the sheet unwinding direction than the grounding surface of the diaphragm 12, and as a result, the punch hole 30a passes below the diaphragm 12 which separates the punch hole 30a into the pressure zone P and the outside of the atmospheric pressure. An air outflow passage through which the pressurized air flows out is formed as indicated by an arrow 32.

A third modified example shown in FIG. 9B is a communication passage 3
It is a sheet material 30C provided with 0b and holes 30c. The communication passage 30b is provided on the lower surface side of the seat that comes into contact with the transport floor surface 13, and is, for example, a plate member 30d having a hole 30c.
The ribs 30 may be provided on the lower surface of the plate, or a plate material (not shown) may be further provided on the transfer floor surface 13 for grounding, and the ribs may be provided between the plate materials. Further, the holes 30c are opened so as to penetrate the plate material 30d on the upper surface side of the sheet material 30C and communicate with the communication path 30b, and a plurality of holes 30c are arranged in the sheet unwinding direction and the width direction. With such a sheet material 30C, the pressurized air that has flowed into the communication passage 30b from the hole 30c located on the pressure zone P side of the diaphragm 12 passes through the communication passage 30b and is located outside the diaphragm 12. An air outflow passage is formed from 30c to the atmospheric pressure.

The configuration of the present invention is not limited to the above-mentioned embodiment, and can be appropriately changed within the scope of the present invention.

[0043]

According to the abnormality diagnosing apparatus and the abnormality diagnosing method for the air pallet conveying apparatus according to the present invention, the following effects can be obtained. According to the abnormality diagnosing device for the air pallet conveying device according to the first aspect, the state of air leakage is determined from a plurality of air leakage situation detecting means arranged around the diaphragm and the detection data of each air leakage situation detecting means. Since it is configured to include the control unit, in addition to the presence or absence of abnormal air leak occurrence, the state of air leak from the position of the one that has detected the strongest air leak among the plurality of air leak situation detecting means, namely, It is possible to judge whether the abnormality is on the transfer floor side or the diaphragm side.

Since it is possible to judge the situation of the air leakage as described above, it is possible to carry out the manual transfer movement with a sense of security, and in the case of automatic transfer, it is used as one of the abnormal signals of the transfer movement. You can also do it. By receiving the abnormal signal, the supply of the pressurized air is stopped, or the supply of the sheet material is further performed, so that the transfer movement of the air pallet transfer device can be stopped immediately.

According to the abnormality diagnosing method of the air pallet carrying device of the fourth aspect, the air leak situation is detected by a plurality of air leak situation detecting means arranged in the peripheral portion of the diaphragm,
In addition to the determination that an air leak has occurred, since the detection data of each air leak status detection unit is input to the control unit and a large leak status is detected, the air leak status is determined from the change in the air leak detection unit. The state of air leakage can be judged from the change in the one that has detected the largest air leakage state among the plurality of air leakage state detection means. Then, if the air leak detecting means that has detected a large air leak situation is fluctuating in a predetermined moving direction, it can be determined that there is an abnormality on the floor side, and the air leak detecting means that has detected a large air leak situation. If there is no fluctuation, it can be determined that there is an abnormality on the diaphragm side, and therefore the state of air leakage can be specifically determined.

If the state of air leakage can be concretely judged in this way, it is possible to carry out the manual transfer movement with a sense of security, and in the case of automatic transfer, one of the abnormal signals of the transfer movement can be detected. It can also be used as one. By receiving the abnormal signal, the supply of the pressurized air is stopped, or the supply of the sheet material is further performed, so that the transfer movement of the air pallet transfer device can be stopped immediately.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an abnormality diagnosing device for an air pallet conveying device according to the present invention.

FIG. 2 shows an arrangement example of the microphones shown in FIG.
It is a figure for demonstrating the case where the situation of the air leak which arises by the foreign material which exists on the conveyance floor surface is judged.

FIG. 3 shows an arrangement example of the microphones shown in FIG.
It is a figure for demonstrating the case where the situation of the air leak which arises by the level difference which exists in a conveyance floor surface is judged.

FIG. 4 is a flowchart in the control unit shown in FIG.

FIG. 5 is a front view showing a configuration example of an air pallet transfer device.

6 is a view (bottom view) of the air pallet transfer device shown in FIG. 5 viewed from the bottom surface.

FIG. 7 is a diagram showing a configuration example of a foreign matter suction / transport stop device provided in the air pallet transport device of FIG.

FIG. 8A is a diagram showing an example of a sheet material, and FIG.
FIG. 8 is a diagram showing a first modification of the sheet material.

FIG. 9A is a diagram showing a second modification of the sheet material,
(B) is a figure showing the 3rd modification of a sheet material.

FIG. 10 is a front view showing a conventional example of an air pallet transfer device.

FIG. 11 shows a transfer path for an air pallet transfer device,
It is a perspective view which shows the prior art example which provided the step.

[Explanation of symbols] 10 Air pallet carrier 11 frames 12 diaphragm 13 Transport floor 14 Air film 20 Foreign object suction / transport stop device 21 casing 22 drums 23 Suction port 24 brushes 25 suction flow path 26 Suction device 30,30A-C sheet material 31 sheet material outlet 40 Abnormality diagnosis device 41 Control unit # 1 to #n microphones (air leak status detection means)

Claims (7)

[Claims] 1. A pressurized air is supplied into a diaphragm mounted on a lower surface of a frame and having an air blowout hole, and the air blown out from the air blowout opening causes a space between the diaphragm and a floor surface. The air pallet transporting device that forms an air film and transports the heavy load loaded on the frame together with the frame, and a plurality of air leak status detecting means arranged around the diaphragm, and each air leak status detection An abnormality diagnosing device for an air pallet transporting device, comprising: a control unit for judging the state of air leakage from the detection data of the means. 2. The abnormality diagnosing device for an air pallet conveying device according to claim 1, wherein the air leak condition detecting means detects a sound generated by the air leak. 3. The abnormality diagnosing device for an air pallet conveying device according to claim 1, wherein the air leak condition detecting means detects a flow of air generated by the air leak. 4. A pressurized air is supplied into a diaphragm mounted on the lower surface of the frame and having an air blowout hole, and the air blown out from the air blowout opening causes a space between the diaphragm and the floor surface. A method for diagnosing an abnormality in an air pallet carrier that forms an air film and carries a heavy object loaded on the frame together with the frame, wherein air leakage is detected by a plurality of air leak condition detecting means arranged around the diaphragm. The air pallet transport is characterized in that the air leak situation is detected based on the change of the air leak detecting means that detects the situation of A method for diagnosing abnormalities in equipment. 5. The air which is judged to be abnormal on the floor side when the air leak detection means which has detected a large air leak situation is moving in a predetermined moving direction and which has detected a large air leak situation. The method for diagnosing an abnormality in an air pallet conveying apparatus according to claim 4, wherein it is determined that there is an abnormality on the diaphragm side when there is no change in the leak detecting means. 6. The abnormality diagnosing method for an air pallet conveyor according to claim 4, wherein the air leakage status detecting means detects a sound generated by the air leakage. 7. The abnormality diagnosing method for an air pallet conveying apparatus according to claim 4, wherein the air leak condition detecting means detects a flow of air generated by the air leak.