JPS6332602B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an apparatus for breaking a board into rod shapes when manufacturing electronic components such as chip resistors.

[Conventional technology and its problems]

Generally, in manufacturing a chip resistor, as shown in FIG. 1, a plurality of vertical lines A1 and horizontal lines A2 are carved in a grid pattern on one side of a substrate A made of ceramic or the like, while on the other side of the substrate. After forming the resistance coating of the chip resistor, and then breaking the substrate A into rod-shaped substrate pieces A3 along the longitudinal line A1, electrode coatings A4, A4 is attached and formed, and this rod-shaped substrate piece A3
is broken at two points in the horizontal line A5 to form a chip resistor piece A5.

In the above case, in order to break the substrate A into a bar-shaped substrate A3 along the vertical line A1,
Conventionally, as shown in FIG.
A substrate A is placed on the upper surface with its line lines A1 and A2 facing upward, and the roller 4 provided on the upper part of the rubber plate 2 is moved by moving the base plate 1 in the direction of arrow 3.
Break the board A into a bar-shaped board piece A3 along the vertical line A1, remove the broken bar-shaped board piece A3 from the top of the rubber plate 2, and then move the base plate 1 in the direction of the arrow. A return movement is performed in the direction of dotted arrow 5, which is the opposite direction to 3.

However, this method not only has low work efficiency because it requires wasted time to return the base plate 1, but also makes it impossible to send the broken bar-shaped substrate pieces one by one to the next process at appropriate intervals. However, the connection to the next process was poor, making it extremely difficult to automate.

As a prior art to eliminate this drawback, JP-A-54
In Publication No. 75687, a substrate A such as a wafer for electronic components is conveyed while being held between a pair of upper and lower endless belts so that the vertical line A1 is perpendicular to the direction of movement. By arranging a convex curved member on one side of the belt and a concave curved member on the other side of the belt, and pinching the substrate with these two curved members via both endless belts,
A configuration is proposed in which the substrate A is broken along the longitudinal line A1 and the broken bar-shaped substrate piece A3 is conveyed to the discharge section while being placed on an endless belt.

By the way, the broken rod-shaped substrate piece A3
Since it is necessary to break along the horizontal line of sight A2 using another breaking device, the rod-shaped board piece A3 is moved to the other breaking device so that the horizontal line of sight A2 faces in a direction perpendicular to the traveling direction. must be placed.

However, when pressed between the uneven curved members, the board A may be broken in both the vertical direction A1 and the horizontal direction A2, or may be broken only in the horizontal direction A2. When the substrate piece A3 is broken in a direction different from the planned direction, it is necessary to change the direction of the substrate piece A3 to be supplied to the next breaking process.

However, in the structure of the endless belt of the prior art, all the belts that are broken in any of the directions are conveyed to the discharge side. It was necessary to remove or rearrange the items that were broken in the direction of .

Furthermore, in Japanese Patent Publication No. 51-28493, the upper and lower surfaces of a board with lines are adhesively coated with a synthetic resin film in advance, and this is applied between a pair of large-diameter rollers and small-diameter rollers having different circumferential speeds. It is proposed that the broken board pieces be pinched and broken at the same time as being separated so that a gap is created between the broken pieces, but even in this prior art, if the pieces are not broken in the desired direction, After the breaking operation, a step of peeling off the synthetic resin film coated with the adhesive is necessary, and the adhesive remains on the surface of the substrate after peeling off.
There is a risk that dirt will adhere during the breaking operation using the rollers again, and a cleaning step is required before doing so, so that all of the above-mentioned prior art techniques have the problem of increasing the number of steps.

The present invention aims to solve the above-mentioned conventional problems.

[Means for solving problems]

Therefore, in the present invention, a small-diameter roller is disposed in parallel with the large-diameter roller, and the small-diameter roller is arranged under the large-diameter roller in a manner that pinches the substrate of the electronic component between the small-diameter roller and the large-diameter roller. While being driven to rotate in the opposite direction, a plurality of narrow annular grooves are formed in the small diameter roller at appropriate intervals in the axial direction, and a plurality of narrow endless belts that fit into the annular grooves are connected to the small diameter roller. It has a configuration in which it is wound between a roller and a pulley provided at a position in front of the roller in its rotational direction.

[Operation and effect of the invention]

According to this configuration, when a substrate is fed between the upper large-diameter roller and the lower small-diameter roller, due to the difference in curvature at the pinching portions of both rollers, the board is aligned along the axial line of both rollers. It can be broken into stick-shaped pieces of board.

Annular grooves are formed in the small diameter roller at appropriately spaced positions in the axial direction, and a narrow endless belt that fits into each of the annular grooves is wound between a pulley located in front of the small diameter roller in the rotational direction. Since the bar-shaped substrate pieces are hung along the lines along the axial direction of the rollers, the bar-shaped substrate pieces can be continuously conveyed to the discharge side while riding in a well-balanced manner on the plurality of endless belts.

In the unlikely event that a piece of substrate is not broken at all along the axial direction of the roller, but is broken in a direction perpendicular to it, it will not be able to ride on the plurality of narrow endless belts in a well-balanced manner. It falls downward without being conveyed.
It can be recovered. In addition, a short bar-shaped board piece that is broken along the axis of the roller and also in a direction perpendicular to it cannot ride in a well-balanced manner on multiple endless belts, as described above. Since there is, this also falls from the endless belt and can be collected.

In this way, board pieces that have not been broken for a long time along the desired direction can be collected without being conveyed to the discharge side of the endless belt, so this conveyance section is where the board pieces are inspected for the direction of the break and defective products. This means that the collection and work can be accomplished at the same time.
This not only contributes to process simplification, but also allows substrate pieces with the same break direction to be continuously supplied to the next process.
This has the effect of improving the connection to the next process and making it easier to automate the process.

〔Example〕

The following describes the drawings of the embodiments of the present invention. In the drawings, reference numeral 10 denotes a large-diameter roller having a relatively soft rubber plate 11 with a hardness of about 70° stretched on the outer peripheral surface;
Reference numeral 12 indicates a small-diameter roller disposed below and parallel to the large-diameter roller 10, and a hardness rubber plate 13, which is appropriately harder than the rubber plate 11 of the large-diameter roller 10, is stretched on the outer peripheral surface of the small-diameter roller 12. installed, both rollers 1
0 and 12 are rotated in directions opposite to each other in the direction of the arrows, and the distance between both rollers 10 and 12 is set to be slightly narrower than the thickness of the substrate A to be broken.

The small diameter roller 12 is provided with annular grooves 13, 13 at appropriately spaced positions in its axial direction, and a shaft 15 having two pulleys 14, 14 is provided at a forward position in the rotation direction of the small diameter roller 12. A narrow endless belt 16, 16 such as a rope is wound between the two pulleys 14, 14 on the shaft 15 and the annular grooves 13, 13 of the small diameter pulley 12, which are provided parallel to the small diameter roller 12. It is made by multiplying.

In this case, a pair of endless belts 16, 16
The spacing is such that the rod-shaped substrate piece A3, which is completely broken along the vertical line A1, is placed on the rod-shaped substrate piece A3 in a well-balanced manner. Those broken along the direction of travel or rod-shaped board pieces A3
The endless belts 16, 16 are separated widely enough to allow the broken and shortened part to fall from between the pair of endless belts 16, 16.

Note that reference numerals 17 and 17 in the figure indicate tension pulleys.

In this configuration, when the substrate A is fed between the large-diameter roller 10 and the small-diameter roller 12, which rotate in opposite directions, with the respective streak lines A1 and A2 facing upward, the substrate A has a circumferential curvature. The bar-shaped substrate pieces A3 are sequentially broken along each vertical line A1 by the pinching pressure of both large and small rollers 10 and 12, which have different diameters.
The two endless belts 1 are automatically transferred onto the two endless belts 16, 16 wound between the pulleys 14, 14 located in front of the
They are placed parallel to each other on 6 and 16 and sent forward one after another.

If the endless belt wound between the small diameter roller 12 and the pulleys 14, 14 located in front of it is made into two rope-like narrow belts 16, 16 as in the above embodiment, both large and small belts can be used. roller 1
In the event of a break between 0 and 12, in the unlikely event that the bar-shaped board piece A3 breaks from the horizontal line of sight A2 and becomes short, or that the board A is not broken along the vertical line of sight A1 and breaks along the horizontal line of sight A2. In other words, substrate pieces that are shorter than a predetermined length are excluded, and only the bar-shaped substrate piece A3 of a predetermined length is selected. This means that defective products can be inspected and recovered at the same time.

Note that the number of narrow endless belts is not limited to two, but may be three or more, and when three or more endless belts are arranged in this way, the two adjacent The arrangement interval of the endless belt can be set so that it can be applied even when supplying a substrate A having a short width dimension (dimension in the direction along the axis of the roller).

As described above, in the present invention, a small diameter roller is disposed in parallel to the lower part of the large diameter roller, and the small diameter roller is configured to pinch the substrate of an electronic component between the large diameter roller, and the small diameter roller and the large diameter roller are arranged in parallel. A circuit board breaking device for electronic components, characterized in that an endless belt is wound between the small-diameter roller and a pulley provided in a forward position in the rotational direction, while the small-diameter roller is driven to rotate in the opposite direction. By simply feeding the substrates between the rollers one after another, the substrates can be broken continuously, so there is no waste in the work and efficiency can be significantly improved.Moreover, the substrates can be broken at appropriate intervals in the axial direction of the small diameter rollers. Since the broken board pieces are transported forward by multiple endless belts that fit into the annular grooves, defective products where the break direction is not the expected direction, such as when the length of the board piece is short, are transported by the multiple endless belts. This also has the effect of being able to remove books that cannot be balanced on the endless belt of books, and simultaneously sorting out and collecting defective pieces.

As a result, only the good rod-shaped substrate pieces after the break can be continuously fed out in a parallel manner onto the endless belt wound between the roller and the pulley in front of it. This has the effect of greatly improving the connection to the process and making automation easier.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the manufacturing process of a chip resistor, Fig. 2 is a diagram showing the conventional breaking direction, Figs. 3 to 5 show embodiments of the present invention, and Fig. 3 is a vertical front view; 4 is a right side view of FIG. 3, and FIG. 5 is a plan view taken along the line V-V of FIG. 3. 10...Large diameter roller, 12...Small diameter roller, 1
4...Pulley, 16...Endless belt, A...
...Substrate, A3... Rod-shaped board piece, A1, A2... Linear line.

Claims (1)

[Claims] 1. A small diameter roller is disposed in parallel with the large diameter roller below the large diameter roller, and the small diameter roller is configured to pinch the substrate of the electronic component between the large diameter roller, and the small diameter roller and the large diameter roller are driven to rotate in opposite directions. On the other hand, a plurality of narrow annular grooves are formed in the small diameter roller at appropriate intervals in the axial direction, and a narrow endless belt that fits into each of the annular grooves is placed in front of the small diameter roller in its rotational direction. A circuit board breaking device for electronic components, characterized in that it is wound between a provided pulley.