JP4406652B2 - Transport device - Google Patents

Description

  The present invention relates to an apparatus that conveys an object to be conveyed by rotating the pair of rollers while sandwiching the object to be conveyed between the pair of rollers.

  2. Description of the Related Art Conventionally, there is known an apparatus that conveys an object to be conveyed by rotating the pair of rollers while sandwiching the object to be conveyed between the pair of rollers. Such a conveying device is provided in a cleaning device for removing dust adhering to the substrate surface in a manufacturing process of a printed circuit board or the like (see, for example, Patent Document 1). This printed circuit board cleaning device (hereinafter abbreviated as “substrate cleaning device”) includes a pair of adhesive cleaning rollers disposed in opposition to each other, and power transmission for transmitting power to the cleaning rollers. Means for adsorbing dust adhering to the substrate to the surface of the cleaning roller while rotating the pair of cleaning rollers while sandwiching the substrate between the pair of cleaning rollers. It is.

JP 2000-84514 A

  By the way, in the substrate cleaning apparatus as described above, as a mechanism for transmitting the rotational force of the drive source to the cleaning roller, a drive-side gear that is driven to rotate about the axis by the drive source, and a target gear connected to the cleaning roller. A gear mechanism or the like composed of a drive side gear is used. However, in the transmission method in the conventional gear mechanism with mechanical contact, dust is generated due to wear and friction of the gear, and the dust adheres to the substrate or the lubricating oil of the gear evaporates to contaminate the substrate. Such a situation may occur, and it may happen that the substrate cannot be transported in a clean state despite being a device for cleaning the substrate.

  Further, in the above-described substrate cleaning apparatus, the upper cleaning roller among the cleaning rollers arranged vertically opposite to each other is configured to be able to move up and down following the unevenness of an electrical component or the like mounted on the surface of the substrate. That is, when a convex portion of a substrate having a thickness larger than a predetermined interval between both rollers is sandwiched between both rollers, the upper cleaning roller is pushed upward by the convex portion. In the case of a conventional gear mechanism with mechanical contact, when the upper cleaning roller moves upward, another means is used so that the meshing state of the driven gear connected to the upper cleaning roller does not change, There is a problem that the mechanism becomes complicated.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a transport device that does not generate dust due to wear, friction, or the like of a gear serving as power transmission means to a roller.

In order to achieve the above object, a transport apparatus according to a first aspect of the present invention includes power transmission means for transmitting rotation to a pair of rollers, and the pair of rollers holds the object to be transported between the pair of rollers. In the conveying apparatus that conveys the object to be conveyed by rotating the rollers, the power transmission means is coupled to the driving side disk that is driven to rotate about the axis by the driving source and the pair of rollers, respectively, and the driving A pair of driven side disks arranged so as to maintain a predetermined gap between the side disks and the driving side disks, and end surfaces thereof facing each other, the driving side disks and the pair of driven disks Permanent magnets are arranged radially and alternately with N poles and S poles on each end face of the side disk to form a magnetic tooth, and the center of one driven side disk is located inside the magnetic tooth in the driving side disk. When placed In addition, the respective magnetic teeth are made to face each other in a state in which the center of the other driven side disk is arranged outside the magnetic teeth in the driving side disk, and the magnetic force of these opposing magnetic teeth causes the driving side disk to Power is transmitted to a pair of driven side disks .

  According to a second aspect of the present invention, there is provided a conveying apparatus according to the first aspect, wherein two pairs of the driven side disks are arranged with respect to one driving side disk.

According to a third aspect of the present invention, there is provided a conveying device according to the first aspect, wherein the pair of rollers are arranged vertically on the side wall plate, and the lower roller rotates about its own axis with respect to the side wall plate. The upper roller can be rotated around its own axis with respect to the side wall plate, and the axis can be moved in the vertical direction while being arranged in a state where movement in a direction orthogonal to the axis is possible. The center of the driven disk connected to the lower roller is arranged inside the magnetic teeth in the driving disk, and the center of the driven disk connected to the upper roller is arranged It is arranged outside the magnetic teeth in the drive side disk .

  According to the transport apparatus of the present invention, the magnetic attraction and repulsion forces of the magnets respectively attached to the driving side disk that is rotationally driven by the driving source and the driven side disk that is connected to the roller are used. The power transmission from the drive side disk to the driven side disk makes it possible to transmit power from the drive side to the driven side in a non-contact manner, like the transmission method in the conventional gear mechanism, There is no generation of dust or the like due to the mechanical meshing of the gears, and the object to be conveyed can be conveyed in a clean state.

  Further, according to the transport device according to the present invention, magnets are alternately arranged on the respective end faces of the driving side disk and the driven side disk, and the both are arranged in such a manner that the end faces face each other. Therefore, even if the driven side disk moves up or down relative to the driving side disk, the gap with the driving side disk is kept constant, so the torque transmitted to the driven side disk becomes extremely small. There is no such thing. As a result, a desired rotational torque can be maintained regardless of the unevenness of the object to be conveyed that is sandwiched between the pair of rollers, and a stable conveying function can be ensured.

  Exemplary embodiments of a transport device according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

  FIG. 1 is a perspective view schematically showing a part of a substrate cleaning apparatus to which a transfer apparatus according to an embodiment of the present invention is applied. Note that the “substrate” in the present embodiment refers to a printed circuit board on which electrical components are mounted on the surface, a printed circuit board before mounting electrical components, a liquid crystal substrate, a plasma display substrate, and the like.

  The substrate cleaning apparatus 30 includes a pair of cleaning rollers 31 and 32 made of an adhesive elastic rubber material such as silicon rubber, and an adhesive tape roller 33 made of a material having a higher adhesiveness than the cleaning rollers 31 and 32. , 34 and power transmission means 10 for transmitting power to the pair of cleaning rollers 31, 32. The actual substrate cleaning apparatus 30 has a configuration in which a plurality of the above rollers are arranged side by side. In FIG. 1, for convenience of explanation, only a pair is shown and the other rollers are not shown.

  The pair of cleaning rollers 31 and 32 are arranged to face each other with a predetermined gap therebetween, and are rotatably supported on a side wall plate (not shown in FIG. 1) via rotating shafts 25 and 26. As shown in FIG. 1, one end of each of the rotary shafts 25 and 26 is connected to the driven side disks 21 and 22 of the power transmission means 10 described later. Hereinafter, the cleaning roller 31 is referred to as “upper cleaning roller 31”, and the cleaning roller 32 is referred to as “lower cleaning roller 32”. The adhesive tape rollers 33 and 34 are arranged outside the cleaning rollers 31 and 32 in contact with the upper and lower cleaning rollers 31 and 32, respectively, and are rotatably supported on the side wall plate via a rotation shaft. Yes.

  In the substrate cleaning apparatus 30 having the above-described configuration, as shown in FIG. 1, the substrate 50 is sandwiched between the cleaning rollers 31 and 32 and the cleaning rollers 31 and 32 are rotated by the power transmission means 10 to be described later. 50 is conveyed in the horizontal direction, and at the same time, the dust adhering to the substrate 50 is adsorbed on the surfaces of the cleaning rollers 31 and 32 to remove the dust from the surface of the substrate 50. The dust adhering to the cleaning rollers 31 and 32 is transferred to the adhesive tape rollers 33 and 34 that rotate while contacting the cleaning rollers 31 and 32.

  Further, in the present embodiment, the lower cleaning roller 32 and the adhesive tape roller 34 can be rotated around their own axis with respect to the side wall plate of the substrate cleaning apparatus 30 main body and moved in a direction perpendicular to the axis. As shown in FIG. 2, the upper cleaning roller 31 and the adhesive tape roller 33 can be rotated around their own axis and the axis can be slid in the vertical direction while being arranged in a regulated state. It arrange | positions so that it may become. More specifically, as shown in FIG. 2, the rotation shaft 25 of the upper cleaning roller 31 and the rotation shaft 35 of the adhesive tape roller 33 are supported by the side wall plate 40 via bearings 41, respectively. In the bearing portion 41, the boss 43 is fitted in a long hole 44 provided in the side wall plate 40 so as to be movable up and down, and a plurality of bolts 42 that fix the bearing portion 41 to the side wall plate 40 are vertically moved in the bolt long hole 45. It is fitted so as to be movable, so that it can slide up and down while supporting the rollers 31 and 33. A predetermined air pressure is applied to the bearing portion 41 of the adhesive tape roller 33 by an air cylinder (not shown) so that the adhesive tape roller 33 is always in close contact with the cleaning roller 31. With the above configuration, for example, when transporting an object to be transported having unevenness on the surface, such as a substrate on which an electrical component is mounted, the upper cleaning roller 31 and the adhesive follow the unevenness of the object to be transported. The tape roller 33 can be moved up and down.

  Next, the power transmission means 10 that transmits the rotation to the upper and lower cleaning rollers 31 and 32 will be described. 3A is a view of the upper and lower cleaning rollers 31 and 32 and the power transmission means 10 in FIG. 1 as viewed from the front, and FIG. 3-2 is a side view (cleaning roller side) of FIG. It is the figure seen from. In FIG. 3A, the substrate 50 that is a transferred object is omitted. 4 is a diagram schematically showing the power transmission means 10, the left figure is a front view of the power transmission means 10, and the right figure is a conceptual diagram showing the magnetic engagement of the power transmission means 10. FIG.

  As shown in FIG. 3A, the power transmission means 10 includes a drive-side disk 11 that is driven to rotate around an axis by a drive source (motor) 1, and upper and lower cleaning rollers via rotary shafts 25 and 26. A pair of driven-side disks 21 and 22 connected to 31 and 32 are provided. The pair of driven-side disks 21 and 22 are arranged so as to maintain a predetermined gap between the pair of driven-side disks 21 and 22 and the driving-side disks 11 face each other. Here, the end surface of the driving side disk 11 indicates a single side portion (planar portion) 16 of the driving side disk 11, and the end surface of the driven side disks 21, 22 refers to one side of the driven side disks 21, 22. Portions (planar portions) 28 and 29 are shown. In the present embodiment, as shown in FIGS. 3-2 and 4, two pairs of driven disks 21 and 22 (that is, two pairs of cleaning rollers 31 and 32) are arranged for one driving disk 11. I'm allowed. In the following description, for convenience of explanation, the drive-side disk 11 will be referred to as the drive-side magnetic gear 11 and the driven-side disks 21 and 22 will be referred to as the upper magnetic gear 21 and the lower magnetic gear 22, respectively. To do.

  The drive-side magnetic gear 11 includes a disk-shaped magnetic plate 12 made of a magnetic material (for example, soft iron material), a rotating shaft 13 that connects the magnetic plate 12 and the motor 1, and a permanent magnet on the end surface 16 of the magnetic plate 12. And magnetic teeth 15 formed by attaching them at equal intervals by appropriate means such as an adhesive. On the other hand, the upper and lower magnetic gears 21 and 22 which are driven sides have the same configuration as the driving side magnetic gear 11, and are made of a disk-shaped magnetic body having a smaller diameter than the driving side magnetic gear 11. Permanent magnets are provided on the magnetic plates 23 and 24, the rotary shafts 25 and 26 connecting the magnetic plates 23 and 24 and the upper and lower cleaning rollers 31 and 32, and the end surfaces 28 and 29 of the magnetic plates 23 and 24. It is comprised from the magnetic tooth | gear 27 formed by attaching at equal intervals.

  As shown in the right diagram of FIG. 4, the magnetic teeth 15 and 27 made of permanent magnets are arranged so that the polarities of adjacent magnetic teeth alternate with N and S poles. The outline of the magnetic teeth 15 of the drive side magnetic gear 11 shown in FIG. 4 is obtained as follows, for example. A point on the circumference of the disk and the center of the circle are connected by a curve, the number of teeth is n, the curve is rotated by 360 ° / n, and n curves are drawn. The set of n curves can be a radial curve (for example, an involute curve) as shown in FIG. The same applies to the magnetic teeth 27 of the upper and lower magnetic gears 21 and 22. By making the magnetic teeth 15 and 27 have the above-mentioned shape, rotation can be transmitted smoothly, and magnetic engagement can be obtained with a larger area, so that magnetic engagement is strengthened. In addition, as a permanent magnet which comprises the magnetic teeth 15 and 27, the rare earth material which has a high energy product of 40MGOe is used, for example.

  As shown in the right diagram of FIG. 4, in the present embodiment, the center (rotary shaft portion) of the lower magnetic gear 22 is arranged so as to be inside the magnetic teeth 15 of the drive-side magnetic gear 11 (hereinafter referred to as “rear shaft”) This state is called “inscribed meshing”). On the other hand, the center (rotating shaft portion) of the upper magnetic gear 21 is disposed so as to be outside the magnetic teeth 15 of the drive-side magnetic gear 11 (hereinafter, this state is referred to as “external meshing”).

  In the power transmission means 10 having the above-described configuration, the magnetic engagement between the magnetic teeth 15 (permanent magnet) of the drive-side magnetic gear 11 and the magnetic teeth 27 (permanent magnet) of the driven-side magnetic gears 21 and 22, that is, facing each other. The driven magnetic gears 21 and 22 are driven by the attractive force between the N and S poles of the magnet and the repulsive force between the N and N poles and the S and S poles. In addition, the rotational torque is transmitted in a non-contact manner. For example, when the driving side magnetic gear 11 is rotated counterclockwise as shown in the right diagram of FIG. 4, the attracting force and repulsive force of the magnet acting between the driven side magnetic gears 21 and 22 cause the driven side magnetic gear 11 to rotate. The magnetic gears 21 and 22 move following the rotation of the drive side magnetic gear 11. That is, when the drive-side magnetic gear 11 rotates counterclockwise, the lower magnetic gear 22 arranged so as to be in mesh with the drive-side magnetic gear 11 rotates counterclockwise as shown in FIG. The upper magnetic gear 21 arranged so as to be externally meshed with the drive-side magnetic gear 11 rotates clockwise as shown in FIG. 4, and the rotation directions of the upper and lower magnetic gears 21 and 22 are reversed. become.

  In the power transmission means 10, a desired rotation ratio is obtained by appropriately setting the number of teeth of the magnetic teeth 15 and 27. In the example shown in FIG. 4, the number of teeth of the drive side magnetic gear 11 is set to 48, and the number of teeth of the upper and lower magnetic gears 21 and 22 is set to 16, respectively. Therefore, when the rotation is transmitted from the drive side magnetic gear 11 to the upper / lower magnetic gears 21, 22, the angular velocities of the upper / lower magnetic gears 21, 22 are increased three times compared to the drive side magnetic gear 11.

  The upper cleaning roller 31 connected to the upper magnetic gear 21 and the lower cleaning roller 32 connected to the lower magnetic gear 22 are rotated in opposite directions as shown in FIG. As a result, the substrate 50, which is an object to be transported, is transported in the horizontal direction while being sandwiched between the upper and lower cleaning rollers 31 and 32.

  FIG. 5 is a diagram schematically showing a state in which the upper cleaning roller 31 moves up and down in accordance with the unevenness of the surface of the substrate 50. FIG. 6 shows driving when the upper magnetic gear 21 moves upward. The position with respect to the side magnetic gear 11 is shown. As shown in FIG. 5, when the upper cleaning roller 31 is pushed upward by the convex portion 51 having a thickness larger than the preset interval between the upper and lower cleaning rollers 31, 32, the upper cleaning is performed accordingly. The upper magnetic gear 21 connected to the roller 31 is also pushed upward. As shown in the upper diagram of FIG. 6, when the upper magnetic gear 21 moves upward from the normal position, the meshing area with the drive-side magnetic gear 11 becomes smaller than that in the normal position, but as shown in the lower diagram. The air gap between the drive-side magnetic gear 11 is kept constant. For this reason, even if the upper magnetic gear 21 moves upward, the rotational torque transmitted to the upper cleaning roller 31 does not become extremely small.

  As described above, according to the substrate cleaning apparatus 30 of the present embodiment, the magnetic attractive force and repulsive force of the magnets attached to the driving side disk 11 and the driven side disks 21 and 22 are utilized, Since the power is transmitted from the drive side disk 11 to the driven side disks 21 and 22, it is possible to transmit the power from the drive side to the driven side in a non-contact manner. It is possible to transport the substrate 50 that is the object to be transported in a clean state without the occurrence of dust or the like due to manual engagement.

  Further, according to the substrate cleaning apparatus 30 of the present embodiment, permanent magnets (magnetic teeth 15, 27) are alternately arranged on the end faces 16, 28, 29 of the drive side disk 11 and the driven side disks 21, 22, respectively. By arranging the electrodes in such a manner that they are arranged in poles and face each other, even if the driven side disk 21 moves up as the cleaning roller 31 is pushed up by the convex portion 51 of the substrate, it can be driven. The gap between the side disks 11 is kept constant. For this reason, the magnitude of the torque transmitted from the driving side disk 11 to the driven side disk 21 does not become extremely small, and a desired rotational torque is obtained regardless of the unevenness of the conveyed object sandwiched between the cleaning rollers. It can be maintained, and a stable rotational torque can be transmitted to the roller.

  Furthermore, according to the substrate cleaning apparatus 30 of the present embodiment, since the driven side disks 21 and 22 are arranged in two pairs with respect to one driving side disk 11, the arrangement space of the power transmission means 10 is reduced. The overall size of the substrate cleaning apparatus can be reduced by reducing the size.

  In the above-described embodiment, only the upper cleaning roller 31 is configured to be movable up and down. However, even if both the upper and lower cleaning rollers are configured to be movable up and down, the same effect as in the above-described embodiment can be obtained. can get.

  In the above-described embodiment, the magnetic teeth 15 and 27 are attached to the end faces 16, 28 and 29 at equal intervals, respectively, but a ring-shaped circular magnet is magnetized in the same shape. May be. Furthermore, although the thickness of each magnetic tooth 15 and 27 is made the same, you may change the thickness of the magnetic tooth 15 and the thickness of the magnetic tooth 27. FIG. Moreover, although the shape of the magnetic teeth 15 and 27 is radial, it is good also as other shapes, such as linear form.

  As described above, the transport device according to the present invention includes the substrate cleaning device described in the above embodiment and the rollers while moving the rollers up and down according to the unevenness of the transported object sandwiched between the pair of rollers. The present invention can be effectively used for a conveying device that rotates and conveys an object to be conveyed.

FIG. 1 is a perspective view schematically showing a part of a substrate cleaning apparatus provided with a transfer apparatus according to an embodiment of the present invention. FIG. 2 is a view showing a support structure for the cleaning roller and the adhesive tape roller in the substrate cleaning apparatus. 3A is a front view of the cleaning roller and the power transmission unit in FIG. FIG. 3B is a diagram of FIG. 3A viewed from the side. FIG. 4 is a conceptual view showing the front view of the power transmission means and the magnetic engagement of the power transmission means in the substrate cleaning apparatus. FIG. 5 is a diagram schematically illustrating a state in which the cleaning roller moves up and down in accordance with the unevenness of the surface of the conveyed object. FIG. 6 is a diagram illustrating the position of the driven-side magnetic gear with respect to the driving-side magnetic gear.

Explanation of symbols

1 Motor (drive source)
10 Power transmission means 11 Drive side magnetic gear (drive side disk)
12 Magnetic board 13 Rotating shaft 15 Magnetic teeth (permanent magnet)
16 End face (of driving side magnetic gear) 21 Upper side magnetic gear (driven side disk)
22 Lower magnetic gear (driven disk)
23, 24 Magnetic board 25, 26 Rotating shaft 27 Magnetic teeth (permanent magnet)
28 End surface (of the upper magnetic gear) 29 End surface (of the lower magnetic gear) 30 Substrate cleaning device 31 Upper cleaning roller (roller)
32 Lower cleaning roller (roller)
50 Substrate (conveyed object)

Claims (3)

Comprising power transmission means for transmitting rotation to the pair of rollers;
In the transport device that transports the transported object by rotating the pair of rollers while sandwiching the transported object between the pair of rollers,
The power transmission means is
A drive-side disk that is rotationally driven around the axis by a drive source;
A pair of driven-side disks that are respectively connected to the pair of rollers, maintain a predetermined gap with the driving-side disk, and are arranged so that the end surfaces of the driving-side disk face each other. ,
Permanent magnets are arranged radially and alternately with N poles and S poles on the respective end faces of the drive side disk and the pair of driven side disks to form magnetic teeth, and the center of one driven side disk is formed. The magnetic teeth are arranged inside the magnetic teeth in the driving side disk, and the magnetic teeth are opposed to each other in a state where the center of the other driven side disk is arranged outside the magnetic teeth in the driving side disk. A conveying apparatus that transmits power from the driving disk to the pair of driven disks by a magnetic force of teeth .   The transport apparatus according to claim 1, wherein two pairs of the driven side disks are arranged with respect to one driving side disk. The pair of rollers are arranged vertically on the side wall plate, and the lower roller is arranged so as to be rotatable about its own axis with respect to the side wall plate and restricted in movement in a direction perpendicular to the axis. On the other hand, the upper roller is arranged so as to be rotatable about its own axis with respect to the side wall plate and to be movable in the vertical direction.
The center of the driven disk connected to the lower roller is arranged inside the magnetic tooth in the driving disk, and the center of the driven disk connected to the upper roller is arranged to be the magnetic tooth in the driving disk. The conveying apparatus according to claim 1, wherein the conveying apparatus is arranged outside the first side.

Images