JP2008007255A - Belt-type conveyance device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyance device capable of preventing fine grains such as worn powders from being scattered, conveying an object easily affected by vibration, and preventing occurrence of noise. <P>SOLUTION: In this belt-type conveyance device having a conveyance belt 4 for loading the object W to be conveyed on it and a belt driving part 2 for moving the conveyance belt 4 at fixed speed, magnetized parts 5 are formed at an interval along the direction of conveyance on the conveyance belt 4, and the objects W to be conveyed on the conveyance belt 4 are attracted by the magnetized parts 5 and are aligned. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a belt-type conveyance device that conveys an object to be conveyed on a conveyance belt.

  As a transport device that transports the object to be transported, a linear chute carrying a plurality of objects to be transported is supported by a leaf spring facing the chute length direction, and the iron core fixed to the chute is supported by an electromagnet. A conveying device is known that sucks and vibrates in the chute length direction and moves the object to be conveyed on the chute in the chute length direction by the vibration (Patent Document 1).

JP-A-8-157030

  However, since the chute vibrates, this transport device is likely to scatter fine particles such as abrasion powder, and cannot be used in an environment such as a clean room that requires high air cleanliness. In addition, it is impossible to transport a sensitive object, such as a precision part, which is vulnerable to vibration, and noise is high.

  The problem to be solved by the present invention is to provide a transport device that is difficult to scatter fine particles such as wear powder, can transport a material to be transported that is weak against vibrations, and hardly generates noise.

  In order to solve the above-described problem, in a belt-type conveyance device having a conveyance belt on which an object to be conveyed is placed and a belt driving unit that continuously moves the conveyance belt, the conveyance belt is spaced along the conveyance direction. In this case, a magnetized part is formed, and the object to be transported on the transport belt is attracted and aligned by the magnetized part.

This belt type conveying device is more preferable when the following configuration is added.
1) The magnetized portion has a pair of magnetic domains whose magnetization direction is the thickness direction of the transport belt, adjacent to each other in a direction perpendicular to the thickness direction of the transport belt so that the magnetization directions are opposite to each other.
2) The conveyance belt is made of magnetic rubber obtained by binding magnetic powder with rubber, and the magnetic rubber is magnetized at intervals along the conveyance direction to form the magnetized portion.
3) A magnetic sensor is provided on the back side of the conveyor belt, and it is determined whether or not the magnetized portion of the conveyor belt is attracting an object to be conveyed based on the magnetic flux density detected by the magnetic sensor.
4) An IC tag reader that reads information stored in the IC tag from an IC tag attached to the conveyed object is provided at a position where the conveyed object above the conveying belt passes, and based on the information read by the IC tag reader The type of the conveyed object is determined.

  In the belt-type conveyance device of the present invention, the magnetized portion formed on the conveyance belt attracts the object to be conveyed, so that the objects to be conveyed on the conveyance belt can be aligned. Further, since the object to be conveyed is conveyed by moving the conveyor belt at a constant speed, the particles are not easily scattered and can be used even in an environment that requires high air cleanliness such as a clean room. In addition, an object to be transported that is susceptible to vibration can be transported, and noise is low.

  Further, the magnetized portion has a pair of magnetic domains whose magnetization direction is the thickness direction of the conveyor belt, adjacent to each other in a direction perpendicular to the thickness direction of the conveyor belt so that the magnetization directions are opposite to each other. Since the conveyed object in the state of being placed on the magnetized part of the conveying belt short-circuits the N pole of one magnetic domain and the S pole of the other magnetic domain, the attracting force of the conveyed object by the magnetized part is large, and The objects to be conveyed can be more reliably aligned.

  The conveyor belt is made of magnetic rubber obtained by binding magnetic powder with rubber, and the magnetic rubber is magnetized at intervals along the conveyance direction to form the magnetized portion. Since there is no seam between parts other than the magnetized part, the conveyor belt is not easily damaged and has high durability.

  In addition, a magnetic sensor is provided on the back side of the conveyor belt, and based on the magnetic flux density detected by the magnetic sensor, it is determined whether or not the magnetized portion of the conveyor belt is attracting an object to be conveyed. It is possible to detect a state where there is no object to be transported on the transport belt.

  In addition, an IC tag reader that reads information stored in the IC tag from an IC tag attached to the conveyed object is provided at a position where the conveyed object above the conveying belt passes, and based on the information read by the IC tag reader In the case where the type of the object to be conveyed is discriminated, since the object to be conveyed is aligned on the conveyor belt, the object to be conveyed regularly passes the position of the IC tag reader, and the information stored in the IC tag is stored. It can be read reliably with an IC tag reader.

  1 and 2 show a belt type conveying apparatus according to a first embodiment of the present invention. The belt-type conveying device 1 includes a driving pulley 2, a driven pulley 3, and a conveying belt 4 that is stretched between the driving pulley 2 and the driven pulley 3.

  The drive pulley 2 is rotationally driven by a motor (not shown), and moves the conveyor belt 4 at a constant speed. The transport belt 4 is made of magnetic rubber obtained by binding magnetic powder with rubber, and magnetized portions 5 magnetized with a magnetic material in the magnetic rubber are formed at regular intervals along the transport direction. Examples of the magnetic powder include rare earth magnetic material powder and ferrite powder, and examples of the rubber that binds the magnetic powder include hydrogenated nitrile rubber (HNBR) and fluorine rubber (FKM).

  As shown in FIGS. 3 and 4, the magnetized portion 5 has a pair of magnetic domains 5N and 5S adjacent to each other in the conveyance direction. The magnetic domains 5N and 5S have the magnetization direction in the thickness direction of the conveyance belt, and the magnetization direction is Opposite directions.

  On the back side of the conveyor belt 4, as shown in FIG. 2, a magnetic sensor 6 that detects the magnetic flux density is provided at a position where the magnetized portion 5 passes. Examples of the magnetic sensor 6 include a Hall sensor using a Hall element whose output voltage changes according to the magnetic flux density, and an MR sensor using an MR element whose resistance changes according to the magnetic flux density.

  In addition, a guide plate 7 is fixed above the transport belt 4 with a gap through which the transported object W passes, and the transported object W on the transport belt 4 is located downstream of the guide plate 7. An IC tag reader 8 that reads information stored in the IC tag from an IC tag (not shown) attached to the transported object W is provided at the passing position.

  The usage example of this belt type conveying apparatus 1 is demonstrated. First, in a state where the transport belt 4 is moved at a constant speed, iron-based transported objects W are sequentially supplied onto the transport belt 4 from a hopper 9 disposed on the upstream side of the belt-type transport device 1. Here, an IC tag storing information corresponding to the type of the transported object W (for example, an identification number indicating the next process of the transported object) is attached to the transported object W in advance.

  The article W to be transported supplied onto the transport belt 4 is attracted to the magnetized portion 5 of the transport belt 4 and transported in a state of being aligned at equal intervals in the transport direction. At this time, based on the magnetic flux density detected by the magnetic sensor 6, it is determined whether or not the object to be transported W is attracted to the magnetized part 5. If the object to be transported W is not attracted to the magnetized part 5, it is continuous. If it is determined that the transported object W in the hopper 9 has run out or the transported object W is clogged at the outlet of the hopper 9, the drive pulley 2 is stopped. For example, the determination as to whether or not the article to be conveyed W is attracted to the magnetized portion 5 is performed as follows.

When the magnetized part 5 passes through the position of the magnetic sensor 6, the output voltage of the magnetic sensor 6 changes. Here, as shown in FIG. 4, when the magnetized part 5 attracts the transported object W, the magnetic flux emitted from the magnetized part 5 is guided into the transported object W, so that the magnetic flux density on the front side of the transport belt 4 is high. Correspondingly, the magnetic flux density on the back side of the conveyor belt 4 also increases. Therefore, as shown in FIG. 5, the output voltage of the magnetic sensor 6 is higher when the transported object W is attracted to the magnetized part 5 than when the transported object W is not attracted to the magnetized part 5. Also changes significantly. By determining whether or not the output voltage exceeds a predetermined threshold value V ₀ set in advance, it is possible to determine whether or not the article to be conveyed W is attracted to the magnetized portion 5.

  In addition, the object to be conveyed W adsorbed in the state where it is vertically superposed on the magnetized portion 5 of the conveyor belt 4 is scraped off by the guide plate 7 so that the state of being vertically overlapped is eliminated.

  Further, the IC tag reader 8 reads the information of the IC tag of the conveyed object W that has passed through the guide plate 7, and the type of the conveyed object W is determined based on the read information.

  Thereafter, the discharge pusher 10 pushes the conveyed object W from the conveyance belt 4, and pushes the extruded conveyance object W to the discharge table 11 provided facing the discharge pusher 10 with the belt-type conveyance device 1 interposed therebetween. move. At this time, the article W to be conveyed passes through a demagnetizer 12 provided between the belt-type conveying device 1 and the discharge table 11 and is demagnetized.

  Finally, the transported object W on the discharge table 11 is gripped by the chuck-type transport device 13 and selectively loaded into the respective charging holes 14A and 14B formed in the discharge table 11 according to the type of the transported object W. To do.

  When this belt type conveyance device 1 is used, the magnetized portion 5 of the conveyance belt 4 attracts the object W to be conveyed, so that the object W can be conveyed while being aligned on the conveyance belt 4. Moreover, since the conveyance belt 4 is moved at a constant speed to convey the article W to be conveyed, the fine particles are hardly scattered and can be used even in an environment that requires high air cleanliness such as a clean room. Further, the object to be transported W that is weak against vibration can be transported, and noise is also small.

  As shown in FIG. 4, when the iron-based object W is placed on the magnetized part 5 of the conveyor belt 4, the N pole of one magnetic domain 5N and the S pole of the other magnetic domain 5S constituting the magnetized part 5 are changed. Since the object to be transported W is short-circuited, the attracting force of the object to be transported W by the magnetized portion 5 is large, and the objects to be transported W on the transport belt 4 are more reliably aligned.

  In addition, since there is no seam between the magnetized portion 5 and the portion other than the magnetized portion of the conveyor belt 4, the conveyor belt 4 is not easily damaged, and the durability of the belt-type conveyor device 1 is high.

  Further, since the object to be conveyed W regularly passes the position of the IC tag reader 8, the information stored in the IC tag of the object to be conveyed W is reliably read by the IC tag reader 8, and the object to be conveyed W is based on the information. The type of can be reliably determined.

  6 and 7 show a belt type conveying apparatus according to a second embodiment of the present invention. This belt type conveyance device 21 is provided with a magnetic sensor 22 by removing the IC tag reader 8 of the first embodiment, and the other configuration is the same. Therefore, portions corresponding to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted. The magnetic sensor 22 is disposed on the back side of the conveyor belt 4 on the downstream side of the guide plate 7, and the magnetized portion 5 passes above the magnetic sensor 22.

  An example of use of this belt type conveyance device 21 will be described. As in the first embodiment, the articles to be conveyed W are sequentially supplied from the hopper 9 onto the conveyor belt 4 while the conveyor belt 4 is moved at a constant speed. At this time, based on the magnetic flux density detected by the magnetic sensor 6, it is determined whether or not the object to be transported W is attracted to the magnetized part 5. If the object to be transported W is not attracted to the magnetized part 5, it is continuous. When the determination is made, the drive pulley 2 is stopped. Further, based on the magnetic flux density detected by the magnetic sensor 22, it is determined whether or not the transported object W is attracted to the magnetized portion 5 that has passed the position of the magnetic sensor 22, and the transported object W is attracted. When it is determined that the transported object W is pushed out from the transport belt 4 by the discharge pusher 10, the extruded transported object W is provided to face the discharge pusher 10 with the belt-type transport device 21 interposed therebetween. Push to discharge conveyor 23. At this time, the article W to be conveyed passes through a demagnetizer 24 provided between the belt-type conveying device 21 and the discharge conveyor 23 and is demagnetized. The article W to be transported is transported to the place of the next process by the discharge conveyor.

  When this belt type conveying device 21 is used, the magnetized portion 5 of the conveying belt 4 attracts the object to be conveyed W as in the first embodiment, so that the object to be conveyed W is conveyed in an aligned state on the conveying belt 4. can do. Further, since the transport belt 4 is moved at a constant speed to transport the transported object W, the particles are not easily scattered and can be used even in an environment that requires high air cleanliness such as a clean room. Further, the object to be transported W that is weak against vibration can be transported, and noise is also small.

  In the above embodiment, in order to eliminate the joint between the magnetized portion and the portion other than the magnetized portion, the conveyance belt is integrally formed of magnetic rubber obtained by bonding magnetic powder with rubber. However, the magnetized portion is formed in another form. May be. For example, the magnetized portion may be formed by embedding rubber magnets in a normal rubber belt at intervals along the conveying direction.

  In the above embodiment, the pair of magnetic domains 5N and 5S are formed adjacent to each other in the conveyance direction, but may be formed adjacent to each other in the width direction of the conveyance belt 4. In short, it may be formed adjacent to the direction perpendicular to the thickness direction of the conveyor belt 4.

  In the above-described embodiment, the conveyance belt 4 is guided by the cylindrical driving pulley 2 and the driven pulley 3 to move the conveyed object W straight. However, the driving pulley and the driven pulley are formed in a conical shape to convey the conveyance belt. May be moved in an arc.

The top view which shows the use condition of the belt-type conveying apparatus of 1st Embodiment of this invention. Sectional view along the line II-II in FIG. FIG. 1 is an enlarged plan view showing the conveyor belt of FIG. The enlarged front view which shows the conveyance belt of FIG. The figure which shows an example of the output voltage of the magnetic sensor of FIG. The top view which shows the use condition of the belt type conveying apparatus of 2nd Embodiment of this invention Sectional drawing along the VII-VII line of FIG.

Explanation of symbols

2 Drive pulley 4 Conveyor belt 5 Magnetic domain parts 5N, 5S Magnetic domain 6 Magnetic sensor 8 IC tag reader W Conveyed object

Claims (5)

  In a belt-type conveyance device having a conveyance belt (4) on which an object (W) is placed and a belt driving unit (2) that moves the conveyance belt (4) at a constant speed, conveyance to the conveyance belt (4) The magnetized part (5) is formed at intervals along the direction, and the object (W) to be transported on the transport belt (4) is attracted and aligned by the magnetized part (5). Belt-type transport device.   The thickness of the conveyor belt (4) is such that the magnetized portion (5) has a pair of magnetic domains (5N, 5S) whose magnetization direction is the thickness direction of the conveyor belt (4) so that the magnetization directions are opposite to each other. The belt-type conveyance device according to claim 1, which is adjacent to a direction perpendicular to the vertical direction.   The said conveyance belt (4) consists of magnetic rubber which couple | bonded the magnetic powder with rubber | gum, and magnetized the magnetic rubber at intervals along a conveyance direction, and formed the said magnetized part (5). The belt-type transport device according to 1.   A magnetic sensor (6) is provided on the back side of the conveyor belt (4), and the magnetized portion (5) of the conveyor belt (4) is moved to the object to be conveyed (W based on the magnetic flux density detected by the magnetic sensor (6). 4) The belt type conveying apparatus according to any one of claims 1 to 3, wherein it is determined whether or not the material is adsorbed.   An IC tag reader (8) for reading information stored in the IC tag from an IC tag attached to the conveyed object (W) is provided at a position where the conveyed object (W) above the conveying belt (4) passes, The belt-type conveyance device according to any one of claims 1 to 4, wherein the type of the object to be conveyed (W) is determined based on information read by the IC tag reader (8).

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