JP2003089411A - Carrying device and belt for base material for circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit base material carrying device and belt therefor capable of carrying even a thin base material without any hindrance. SOLUTION: A belt is set round over each pair of groove-form pulleys 26 attached rotatably to each of the bodies of side frames 16 and 18 and guided by belt guides 22. A stationary base board guide 24 installed on each frame body 20 covers from above each belt 30 in their parts farthest from each other, and a plurality of supporting projections 66 installed isolatedly in the longitudinal direction are formed on the carrying part 64 of each belt 30 not covered with the guide 24, and the supporting surface 68 as assembly of the top points of the projections 66 is located between the bottom and top edges of the guide surface 62, and there a printed circuit board 58 is supported. The printed circuit board 58 is carried under guidance of the guide surface 62 with running round of the belts 30. The supporting surface 68 is positioned above the gaps between the guide 24 and belts 30 so that even a thin printed circuit board 58 will not intrude into the gaps to result in hindrance of the carriage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for conveying a circuit substrate such as a printed circuit board using a belt and an improvement of the belt for conveying.

[0002]

2. Description of the Related Art Some circuit board conveying devices of this type include a pair of belts, a plurality of pulleys, and a pair of base material guides. The pair of belts are arranged at positions separated from each other, and are wound around a plurality of pulleys. The plurality of pulleys keeps each of the belts in a state of having linear portions that extend substantially horizontally in parallel with each other, and moves the linear portions in the same direction at the same speed. The pair of base material guides are arranged so as to cover the portions of the linear portions of the pair of belts on the far side from each other from above,
It has a pair of guide surfaces facing each other. Both end portions of the circuit substrate are supported by a pair of conveying portions, which are portions of the linear portions of the pair of belts that are not covered by the substrate guides, and the linear portions are moved to form a circuit substrate. Is conveyed while its both end surfaces are guided by the guide surfaces of the pair of base material guides.

If the portions of the linear portions of the pair of belts on the far side from each other are covered with the pair of base material guides, the waste of the circuit base material can be reduced while ensuring the strength and disposition of the belts. it can. Since it is common that no electrical component forming an electric circuit (including an electronic circuit) is mounted on the portion of the circuit substrate supported by the belt, it is desirable that the portion supported by the belt is small. If the belt has a narrow width, even if the circuit substrate is supported by the entire belt, there are few parts where the electric components of the circuit substrate are not mounted, and waste is reduced, but in order to secure the strength of the belt. Therefore, it becomes difficult to bend the belt with a small radius of curvature, which makes the arrangement difficult. On the other hand, by making the belt thin and wide, and by covering the portions of the linear portions of the pair of belts on the far side from each other with the pair of base material guides, the portion supporting the circuit base material of the belt is reduced, It is possible to reduce the waste of the circuit substrate while ensuring the strength and disposition property of the circuit. Further, there is an advantage that the bulging of the belt upward is prevented by the base material guide.

However, in the case where the base material guide is provided so as to cover the portions of the linear portions of the pair of belts on the far side from each other in this manner, if the circuit base material is thin,
The circuit base material may enter the gap between the base material guide and the belt, and the conveyance may be hindered. The base material guide and the belt are arranged so that this clearance is as small as possible, but a clearance is required to allow the belt to circulate, and depending on the thickness of the circuit base material, the situation may occur. It cannot be avoided.

[0005]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention has a circuit base material transfer device and a transfer base material transfer device that can transfer a circuit base material even if the circuit base material is thin. It was made as an issue to provide. INDUSTRIAL APPLICABILITY According to the present invention, the circuit board carrier and belt of the following aspects are obtained. Similar to the claims, each aspect is divided into paragraphs, each paragraph is numbered, and the numbers of other paragraphs are referred to as necessary. This is to clearly indicate the possibility of combining the features described in each section. (1) A pair of belts arranged at mutually separated positions, and the pair of belts are respectively wound around each other, and each of the belts is kept in a state of having linear portions extending substantially horizontally in parallel with each other. , A plurality of pulleys that move the linear portions in the same direction at the same speed, and a pair of guide surfaces that are arranged so as to cover the portions of the linear portions of the pair of belts on the far side from above, and that face each other. And a pair of base members having a pair of carrier guides each of which is a portion of each linear portion of the pair of belts on the side not covered by the base member guides, and supports both side ends of the circuit base member. In a circuit substrate conveying device that guides both end surfaces of a material by the guide surfaces of a pair of substrate guides, on the upper surface of the conveying portion of the pair of belts, the belt protrudes upward from other parts and A plurality of support protrusions that are discretely arranged in the longitudinal direction of the guide protrusions are used as the support face, and the height of the support face is the height between the lower end edge and the upper end edge of the guide face. A circuit board transporting device (claim 1). Both ends of the circuit substrate are supported from below by the respective support protrusions of the pair of belts, and the linear portions of the belt are moved so that both end faces are guided by the pair of guide surfaces. The circuit substrate is supported and conveyed by a support surface, which is a set of upper end surfaces (which may be upper end points or upper end lines depending on the shape of the support projections) of the plurality of support projections. Is located between the lower edge and the upper edge of the guide surface and is located above the gap between the base material guide and the belt. The circuit base material does not enter the gap and it is sent smoothly. It is possible to smoothly feed even if the circuit base material is thin, while ensuring the strength and disposition property of the belt and reducing the waste of the circuit base material. The support protrusion may be a short protrusion in a direction perpendicular to the longitudinal direction of the belt or a long protrusion in the same direction. In the former case, the support protrusion may be, for example, a hemispherical shape or a protrusion having a triangular or quadrangular cross-sectional shape. In the latter case, the support protrusions may have various cross-sectional shapes in a direction parallel to the longitudinal direction of the belt, such as a semicircle, a triangle, and a quadrangle.

(2) A positioning protrusion is provided on the lower surface of the linear portion, and the belt is positioned in the width direction by engaging the pulley with the positioning protrusion. The circuit board transfer device (claim 2). The engagement of the pulley with the positioning protrusion prevents the belt from being displaced in the width direction. (3) A belt guide that supports and guides the linear portion from below is provided, and a groove that engages with the positioning protrusion and positions the belt in the width direction is provided in the belt guide. The circuit board carrier according to claim 3 (claim 3). The engagement of the groove of the belt guide with the positioning protrusion prevents the belt from being displaced in the width direction.

(4) In a belt which is formed in an endless shape, is wound around a pair of pulleys, and circulates as the pulleys rotate, one of the two end portions of the belt is provided on one outer peripheral surface of the belt with the other portion. A belt provided with a plurality of support protrusions protruding toward the outer peripheral side and discretely arranged in the longitudinal direction of each belt (claim 4). Belts in this section are (1) to (3)
It is suitable as a constituent element of the circuit board conveying device described in each of the items. (5) A positioning protrusion for positioning the belt in the width direction by engaging with the pulley is provided on the inner peripheral surface of the belt along the longitudinal direction of the belt. Belt (claim 5). (6) The belt according to (5), wherein the positioning protrusion is provided substantially at the center in the width direction of the belt (claim 6).

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a case where the present invention is applied to a carry-in conveyor and a conveyor belt, which are components of a substrate conveyor constituting an electric component mounting system, will be described in detail with reference to the drawings. . 1 in FIG.
Is a base, and a carry-in conveyor 12 is provided on the base 10. The carry-in conveyor 12 has a pair of side frames 16 and 18. These side frames 16, 18
As shown in FIGS. 1 and 2, each includes a frame body 20, a belt guide 22, and a substrate guide 24 serving as a base material guide. Belt guide 22 and substrate guide 2
4 are provided in pairs, respectively.

Each frame body 20 of the side frames 16 and 18 has a longitudinal shape and is parallel to each other and horizontally.
Further, they are provided with a distance in the direction orthogonal to the longitudinal direction. Groove pulleys 26, which are rotating members, are rotatably attached to both ends of the frame main body 20 facing each other in the longitudinal direction.
Each of these groove type pulleys 26 is provided with an annular groove 28, and each pair of groove type pulleys 26 attached to the two frame bodies 20 respectively,
An endless belt 30 is wrapped around. Belt 30
Are provided in pairs.

As shown in FIG. 3, positioning protrusions 32 are provided at the center portions of the inner peripheral surfaces of the pair of belts 30 in the width direction.
Are continuously projected in the longitudinal direction, and the groove 2 of the grooved pulley 26 is provided.
8 to prevent the belt 30 from being displaced in the width direction. The belt guide 22 is detachably fixed to a portion between the pair of groove type pulleys 26 of the two frame bodies 20 by fixing means such as bolts (not shown). Each of the pair of belt guides 22 has a longitudinal shape and is fixed in parallel with the longitudinal direction of the frame body 20. The pair of belt guides 22 each have a groove 34 formed on the upper surface thereof to form the positioning protrusion 32 of the belt 30.
The belt 30 is supported from below by the belt guide 22 and the positional deviation in the width direction is prevented. The portions of the pair of belts 30 between the portions wound around the grooved pulleys 26 and the portions guided by the belt guides 22 are arranged at positions separated from each other and extend substantially horizontally in parallel with each other. Straight part 3
6 (FIG. 3 shows the linear portion 36 of the one belt 30 and the one belt guide 22).

Each of the pair of belts 30 is further illustrated in FIG.
As shown in FIG. 3, the two frame main bodies 20 are wound around two guide pulleys 38 and 42 that are rotatably provided as rotation guide members, and are also wound around a drive pulley 40 that is a rotation drive member. . Although only two guide pulleys 38 and 42 are shown in FIG. 2, one guide pulley 38 and one guide pulley 42 are provided on each side of the drive pulley 40 in the longitudinal direction of the frame body 20. The guide pulley 42 is configured similarly to the grooved pulley 26, has an annular groove 46, and is wound around the belt 30 from the side where the positioning protrusion 32 is provided (inner peripheral surface side). The positioning protrusion 32 is fitted into the groove 46 to prevent the belt 30 from being displaced in the width direction. Each of the guide pulley 38 and the drive pulley 40 is provided with a pair of radially outward flange portions 44 that prevent the belt 30 from being displaced in the width direction, and the belt 30 is provided with a positioning protrusion 32 as described later. It is configured to be wound on the surface side opposite to the open side. The belt 30 includes the grooved pulley 26 and the guide pulley 3
8, the guide pulley 42, the drive pulley 40, the guide pulley 42, the guide pulley 38, and the grooved pulley 26 are wound in this order.

The drive pulleys 40 rotatably provided on the two frame bodies 20 are rotated by dedicated motors 50, and the pair of belts 30 are rotated. The motor 50 is an electric rotary motor that is an electric motor that is a kind of a drive source, is a servomotor capable of controlling the rotation angle and the rotation speed with high accuracy, and is a motor with a reduction gear, and includes two motors. 50 is controlled by a controller 52 (see FIG. 1). Control device 52
Is mainly composed of a computer, and the two motors 50 are synchronously controlled by the control device 52, respectively, so that the pair of belts 30 rotate so that the linear portions 36 move in the same direction at the same speed. To be made. A portion of the two motors 50, the drive pulley 40, the grooved pulley 26, the guide pulleys 38, 40, and the control device 52 that controls the two motors 50 constitutes a belt drive device 54. A step motor may be used instead of the servo motor.

Each of the substrate guides 24 constituting the side frames 16 and 18 is detachably fixed to the frame body 20 by a bolt 56 (see FIG. 1) which is a kind of fixing means. The board guide 24 has an elongated shape as shown in FIG. 1, and as shown in FIG.
0 from the frame body 20 to the other frame body 20
It is fixed so as to project to the side, and covers the portions of the linear portions 36 of the pair of belts 30 on the far side from each other from above. The surfaces of the board guides 24 that face each other form guide surfaces 62 that guide each side end surface 60 of the printed board 58, which is a type of circuit substrate. A pair of substrate guides 24 are provided, and a pair of guide surfaces 62 are also provided. A gap is provided between the substrate guide 24 and the pair of belts 30 to allow the belt 30 to circulate.

The portion of each linear portion 36 of the pair of belts 30 on the side not covered by the substrate guide 24 constitutes a conveying portion 64. A pair of transport units 64 are provided.
As shown in FIGS. 3 and 4, the upper surfaces (outer peripheral surfaces of the belts 30) of the pair of conveying portions 64 respectively project upward (outer peripheral side) from other portions and the longitudinal direction of each belt 30. A plurality of support protrusions 66 that are discretely lined up are formed. The support protrusion 66 is provided in the opposite direction to the positioning protrusion 32. These support protrusions 66
Each have a hemispherical shape, and a set of upper end points of a plurality of support protrusions 66 provided on the pair of belts 30 respectively constitutes a support surface 68, and supports both end portions of the printed circuit board 58 from below. There is. The heights of the pair of support surfaces 68 are the same as each other, and are set between the lower end edge and the upper end edge of the guide surface 62 of the substrate guide 24.

The guide pulley 38 and the drive pulley 4
As shown in FIG. 2, each 0 is provided with a support projection accommodating portion 70 having an annular groove shape. Belt 30
Is from the surface side of the guide pulley 38 and the drive pulley 40 opposite to the side where the positioning protrusion 32 is provided (the inner peripheral surface side of the belt 30), that is, the surface side where the support protrusion 66 is provided (the belt 30). The outer peripheral surface side of),
The support protrusion 66 is housed in the support protrusion housing portion 70. The belt 30 is prevented from being displaced in the width direction by the pair of flange portions 44. Further, since the support protrusion 66 is accommodated in the support protrusion accommodating portion 70, the belt 30 is wound around the guide pulley 38 and the drive pulley 40 without tilting, and the rotation of the drive pulley 40 is ensured. Be transmitted to. Support protrusion housing 70
Can also be said to be a support projection escape portion for allowing the support projection 66 to escape. Two guide pulleys 38,
By disposing the belt 30 by using the belt 42, the belt 30 is wound around the drive pulley 40 at a portion corresponding to approximately 180 degrees of the central angle thereof, and the belt 30 is surely rotated as the drive pulley 40 rotates. Can be orbited.

When the printed circuit board 58 is conveyed, the two motors 50 are activated to rotate the pair of belts 30 and the pair of linear portions 36 are moved in the same direction at the same speed to move the pair of belts 30. The printed board 58 whose both end portions are supported from below by the respective support protrusions 66 has the both end surfaces 6
0 is conveyed while being guided by the guide surfaces 62 of the pair of substrate guides 24. The height of the support surface 68 is equal to the guide surface 6
The height is between the lower edge and the upper edge of 2, and the support surface 68 is located between the lower edge and the upper edge of the guide surface 62.
Since the printed circuit board 58 is located above the gap between the substrate guide 24 and the belt 30, the printed circuit board 58 can be inserted into the gap between the substrate guide 24 and the belt 30 even if the printed circuit board 58 is thin. Instead, it is transported smoothly.

Although the belt guide 22 and the substrate guide 24 are detachably fixed to the frame body 20 in each of the above embodiments, at least one of the substrate guide and the belt guide may be integrated with the frame body. .

In each of the above-described embodiments, the pair of belts 30 can be rotated by using a dedicated motor as a drive source. However, the motor is shared by the pair of belts and the pair of belts is mechanically used. You may make it rotate in synchronization and move each linear part in the same direction at the same speed.

Furthermore, the present invention is not limited to a carry-in conveyor, which is a component of a board conveyor constituting an electric component mounting system, but also a carry-out conveyor, a board positioning support device for positioning and supporting a printed circuit board when mounting an electric part. The present invention can be applied to a provided conveyor or a device that conveys a printed circuit board or a circuit substrate other than the printed circuit board by a belt in a device other than the electric component mounting system.

In addition, the present invention can be implemented in various modified and improved modes based on the knowledge of those skilled in the art without departing from the scope of the claims.

[Brief description of drawings]

FIG. 1 is a plan view showing a carry-in conveyor and a belt, which are each an embodiment of the present invention.

FIG. 2 is a side view (partially sectional view) showing the carry-in conveyor and the belt.

FIG. 3 is a side view (partially cross-sectional view) showing enlarged main parts of the carry-in conveyor and the belt.

FIG. 4 is a front view showing the carry-in conveyor and a belt.

[Explanation of symbols]

12: carry-in conveyor 24: substrate guide 30: belt 36: straight line portion 58: printed circuit board 60: side end surface 62: guide surface 64: transport portion 66: support protrusion 68: support surface

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mamoru Tsuda             Fuji Machinery, 19 Chasuyama, Yamamachi, Chiryu City, Aichi Prefecture             Manufacturing Co., Ltd. F term (reference) 3F023 AA05 BA08 BA09 BA10 BB02                       BC01                 3F024 CA06 DA01 DA17                 3F025 BA02                 3F033 GA02 GD09

Claims (6)

[Claims] 1. A pair of belts disposed at mutually separated positions, and a pair of belts respectively wound around the belts, and each of the belts having straight portions extending substantially horizontally in parallel with each other. A plurality of pulleys that keep the linear portions moving in the same direction at the same speed, and a pair of belts that are arranged so as to cover portions of the linear portions of the pair of belts on the far side of each other from above are provided. And a pair of base members having a guide surface, and supports both side ends of the circuit base member by a pair of conveyance units that are portions of the linear portions of the pair of belts that are not covered by the base member guides. In a circuit substrate conveying device that guides both end surfaces of a circuit substrate by the guide surfaces of the pair of substrate guides, on the upper surface of the conveying portion of the pair of belts, and projecting upward from other portions. In addition, a plurality of support protrusions discretely arranged in the longitudinal direction of each belt are formed, and the upper end surfaces of the support protrusions are used as a support surface, and the height of the support surface is the lower end edge and the upper end edge of the guide surface. A circuit board carrier device having a height between the two. 2. A positioning protrusion is provided on the lower surface of the linear portion, and the belt is positioned in the width direction by engaging the pulley with the positioning protrusion. 1. The circuit board transfer device according to 1. 3. A belt guide that supports and guides the straight portion from below is provided, and a groove that engages with the positioning protrusion and positions the belt in the width direction is provided in the belt guide. The circuit substrate carrier according to claim 2, which is characterized in that. 4. A belt, which is formed in an endless shape, is wound around a pair of pulleys, and circulates in accordance with the rotation of the pulleys. A belt which is provided with a plurality of supporting protrusions which project to the side and are discretely arranged in the longitudinal direction of each belt. 5. A positioning protrusion for positioning the belt in the width direction by engaging with the pulley is provided on the inner peripheral surface of the belt along the longitudinal direction of the belt. The belt according to claim 4. 6. The belt according to claim 5, wherein the positioning protrusion is provided substantially at the center in the width direction of the belt.