JP3663902B2 - Substrate transport belt and substrate transport apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a substrate transfer belt and a substrate transfer device for transferring a thin substrate through an electronic component mounting line.
[0002]
[Prior art]
In an electronic component mounting line such as an electronic component mounting apparatus for mounting an electronic component on a substrate or a screen printing apparatus for printing cream solder on an electrode of the substrate, the substrate is transported through the electronic component mounting line by a transport device. A belt is frequently used as a substrate transfer device.
[0003]
FIG. 5 is a partial sectional view of a conventional substrate transfer apparatus. A guide groove 3 is formed along the longitudinal direction of the support frame 1 on the upper surface of the guide portion 2 protruding from the support frame 1. A presser plate 4 is detachably mounted on the upper surface of the support frame 1 with screws 5. The belt 6 is made of a flexible material such as synthetic resin or rubber, and a protrusion 7 that fits into the guide groove 3 is provided on the lower surface thereof.
[0004]
The belt 6 slides on the upper surface of the guide portion 2 while being guided by the guide groove 3. The side edge of the substrate 8 is placed on the belt 6, and is transported through the transport path by the belt 6.
[0005]
[Problems to be solved by the invention]
The support frame 1, the presser plate 4, and the belt 6 inevitably have dimensional errors due to processing and molding errors, and a gap t is generated between the upper surface of the belt 6 and the lower surface of the presser plate 4. Also, the thickness of the substrate varies due to processing and molding errors. For this reason, in the case of a thin substrate indicated by reference numeral 9, the side end portion 9a is likely to enter into the gap t as shown by the chain line, and as a result, the substrate 9 cannot easily be conveyed. There was a point.
[0006]
Of course, it is conceivable to solve the above problem by designing the gap t to be as small as possible. However, when the gap t is reduced, the upper surface of the belt 6 that is slightly thick due to a processing molding error is the presser plate. 4 is brought into sliding contact with the leading edge E of the belt 4, and the upper surface of the belt 6 is cut in a streak shape at the edge E, resulting in a problem that the life of the belt 6 is shortened and the belt 6 must be frequently replaced.
[0007]
Accordingly, the present invention solves the above-described problems and provides a substrate transport belt and a substrate transport apparatus capable of smoothly transporting a substrate by reliably preventing a thin substrate from entering between the belt and the presser plate. The purpose is to do.
[0008]
[Means for Solving the Problems]
The present invention relates to a belt for transporting a substrate disposed between a support frame and a presser plate mounted on the support frame, and a belt-like body that slides on the upper surface of the support frame, and a lower surface of the belt-like body. A first protrusion projecting at a pitch and sliding in a guide groove formed on the upper surface of the support frame, and a pitch directly above the first protrusion on the upper surface of the strip. Ri and a second projection which is projected to slide along the lower surface of the pressing plate, and between the first projection, wherein the forming the groove in the transverse direction of the strip It is a belt for conveying a substrate.
[0009]
The present invention further includes a support frame having a guide groove formed on the upper surface, a presser plate mounted on the support frame, and a belt that travels between the support frame and the presser plate. A first protrusion that slides at a pitch, and a second protrusion that slides along the presser plate at a pitch directly above the first protrusion on the upper surface of the belt. The substrate transport apparatus is characterized in that a groove is formed in the transverse direction of the belt-like body between the first protrusions .
[0010]
In each invention of the above-described configuration, the belt slides on the support frame, and the substrate is transported with its side end supported by the belt. In the case of a thin substrate, the side end portion tries to enter the gap between the belt and the presser plate, but since this entry is blocked by the second protrusion protruding from the upper surface of the belt-like body, the substrate is more stable by the belt. It is transported straight through the transport path with the posture.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a side view of a belt according to an embodiment of the present invention, FIG. 2 is a partial perspective view of the belt, FIG. 3 is a cross-sectional view of the transport device for the substrate, and FIG. FIG.
[0012]
First, the structure of the belt will be described with reference to FIGS. The belt 10 is made of a flexible material such as silicon rubber. The belt 10 has first protrusions 12 protruding at the center of the lower surface of the elongated band 11 with a pitch in the longitudinal direction, and second protrusions 13 protruding at the upper surface of the band 11 with a pitch. It consists of The second protrusion 13 protrudes directly above the first protrusion 12. In addition, a groove 14 having a V-shaped cross section is formed in the transverse direction between the first protrusions 12 on the lower surface of the band 11 in order to ensure the flexibility of the band 11.
[0013]
FIG. 3 is a cross-sectional view of the substrate transfer apparatus. A guide portion 21 projects from the inside of the upper portion of the support frame 20. A holding plate 22 is detachably mounted on the upper surface of the support frame 20 with bolts 23. The belt 10 is adjusted by a pulley (not shown) and rotates between the guide portion 21 and the presser plate 22. The substrate 9 is transported by placing both end portions on the left and right belts 10.
[0014]
In FIG. 4, a guide groove 25 is formed on the upper surface of the guide portion 21 along the longitudinal direction of the guide portion 21, and the first protrusion 12 on the lower surface of the belt 10 is fitted in the guide groove 25. Slide along this. Further, a key-shaped notch 26 is formed at the lower surface side corner of the presser plate 22, and the second protrusion 13 is fitted into the notch 26 and slides along this. t is a gap t between the upper surface of the belt-like body 11 and the presser plate 22, and the size of the gap t varies due to a processing molding error, and the thickness of the substrate 9 also varies due to the processing molding error.
[0015]
As shown in FIG. 3 and FIG. 4, the substrate 9 is carried on the belt-like body 11, and a second protrusion 13 is projected along the longitudinal direction at the center of the upper surface of the belt-like body 11. Therefore, the second end 13 prevents the side end portion 9a of the substrate 9 from entering the gap t, and the substrate 9 is conveyed straight by the belt 10 in a stable posture on the conveyance path. The belt 10 rotates along a pulley (not shown), but the second protrusions 13 are provided with a pitch so that the flexibility of the belt 10 is not hindered. Can rotate smoothly while flexing along the pulley.
[0016]
【The invention's effect】
As described above, according to the present invention, even when the thickness of the substrate is thin and the thickness varies, the side end portion of the substrate does not enter the gap between the belt-like body and the holding plate, The conveyance path can be conveyed straight in a stable posture.
[Brief description of the drawings]
FIG. 1 is a side view of a belt according to an embodiment of the present invention. FIG. 2 is a partial perspective view of a belt according to an embodiment of the present invention. Sectional view [FIG. 4] Partial enlarged sectional view of the substrate transfer apparatus according to one embodiment of the present invention [FIG. 5] Partial sectional view of a conventional substrate transfer apparatus [Explanation of symbols]
9 Substrate 10 Belt 11 Strip 12 First Projection 13 Second Projection 20 Support Frame 21 Guide Unit 22 Presser Plate 25 Guide Groove 26 Notch

Claims (2)

A belt for transporting a substrate disposed between a support frame and a press plate mounted on the support frame, and a belt-like body that slides on the upper surface of the support frame, and a lower surface of the belt-like body with a pitch. A first protrusion that protrudes and slides in a guide groove formed on the upper surface of the support frame, and is protruded at a pitch directly above the first protrusion on the upper surface of the strip. Ri and a second protrusion that slides along the lower surface of the pressing plate, and for conveying the substrate, wherein the forming the groove in the transverse direction of the strip between the first projection belt. A support frame having a guide groove formed on the upper surface, a presser plate mounted on the support frame, and a belt that travels between the support frame and the presser plate, and slides in the guide groove on the lower surface of the belt. the first projection while projecting at a pitch, projecting the second projection to slide along said pressing plate at a pitch just above the first projection of the upper surface of the belt And the board | substrate conveyance apparatus characterized by forming the groove | channel in the cross direction of the strip | belt-shaped body between the 1st protrusions .

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