JP3348978B2 - Length sorting device for rod-shaped substrates - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention discriminates whether or not a bar-shaped substrate has a predetermined length when a material substrate is broken on a bar-shaped substrate in the manufacture of electronic components such as chip resistors. And a device for the same.

[0002]

2. Description of the Related Art Generally, the following method is generally used for manufacturing a chip resistor. That is, first, as shown in FIG. 1, a ceramic material substrate A having a grid-shaped break score line A1 engraved on the surface thereof.
And forming a resistive film and an upper electrode film on both ends of the resistive film on a portion of each chip piece A2 surrounded by each break line A1 on the surface of the material substrate A. As shown in FIG. 2, margins A3, A4, A5, and A6 around the material substrate A are removed by breaking along the break line A1,
Further, as shown in FIG. 3, a break is made on the rod-shaped substrate A7 along the break line A1, and side electrode films are formed on both left and right long side surfaces A7 'and A7 "of the rod-shaped substrate A7. Substrate A7 is connected to each break line A
It is manufactured by breaking each chip piece A2 along 1.

Further, both longitudinal side surfaces A of the rod-shaped substrate A7 are
When forming the side surface electrode film on 7 ′, A7 ″, as shown in FIG. 4, the rod-shaped substrate A7 is clamped at both ends by clamp pieces B, and in this state,
The two longitudinal side surfaces A7 ', A of the rod-shaped substrate A7 are applied to the roller C having the electrode film paste applied to the outer peripheral surface in advance.
The method of pressing 7 ″ is adopted.

[0004]

When the substrate A is to be broken on the bar-shaped substrate A7 along the break line A1, one chip piece A2 at the end of the bar-shaped substrate A7 is required. It is quite possible that only a few chips are missing. In such a case, the rod-shaped substrate A7
Is the length of the chip A2 on the rod-shaped substrate A7.
Is shorter than the predetermined length dimension S when the predetermined number of the rod-shaped substrates A7 are uniform, which may cause a situation in which the rod-shaped substrate A7 cannot be clamped in the subsequent step of forming the side electrode film or the like.

Therefore, the bar-shaped substrate A7 after breaking
Must be selected so as to exclude the rod-shaped substrate A7 whose length dimension is shorter than a predetermined length, and then proceed to the next step. However, since the length dimension of the ceramic rod-shaped substrate A7 originally has a considerably large variation, only the rod-shaped substrate A7 in which only one chip piece A2 is missing is selectively selected. Since it is extremely difficult to sort out, a rod-shaped substrate A7 having only one chip piece A2 is frequently sent to the next step, which causes a problem such as inability to work in the next step. was there.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus capable of reliably selecting and removing a rod-shaped substrate having only one chip piece missing.

[0007]

In order to achieve this technical object, the present invention provides a pair of left and right belts for transferring a plurality of chip pieces in a state of being arranged in a row in a row on a top surface. A reciprocating work positioning member that moves forward toward the bar-shaped substrate on the upper surface thereof is disposed outside the two belts, and furthermore, at a position of the two work positioning members, a space between the two belts is provided. An expansion means is provided for expanding the length of the rod-shaped substrate having a predetermined number of chip pieces to a length shorter than the length of the rod-shaped substrate having a predetermined number of chips by the width of one chip piece in a state where the two workpiece positioning members are moved forward. . "

[0008]

In this configuration, when the bar-shaped substrate transferred by the two belts comes to the position of the two work positioning members, the two work positioning members move forward with each other, so that the bar-shaped substrates on the upper surfaces of the two belts are moved. The belt is positioned at a substantially central position between both belts.

Next, expansion means expands the interval between the two belts to a length shorter than the length of the rod-shaped substrate having a predetermined number of chip pieces by the width of one chip piece. Then, a rod-shaped substrate having a predetermined length in which a predetermined number of chip pieces are aligned among the rod-shaped substrates does not fall from between the two belts because both ends are placed on the upper surfaces of both belts.

However, one of the rod-shaped substrates lacks one chip, and the length of the rod-shaped substrate is shorter than the predetermined length by the width of one chip. Is extended to a dimension shorter than the length dimension of the bar-shaped substrate having a predetermined number of chip pieces by the width dimension of one chip piece, so that both ends or one end thereof are disengaged from the upper surfaces of both belts. That is, the rod-shaped substrate having two or more chip pieces of each rod-shaped substrate falls from between the belts.

[0011]

Therefore, according to the present invention, when a bar-shaped substrate broken from a material substrate is transported while being placed side by side on the upper surfaces of both belts, at least one chip piece of each bar-shaped substrate is chipped. Can be reliably selected to be selectively removed from the upper surfaces of both belts, greatly reducing the possibility that a bar-shaped substrate lacking at least one chip piece will be sent to the next step. Has an effect that can be.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In this figure, reference numerals 1 and 2 are
A pair of left and right belts is shown, and the two belts 1 and 2 are configured to transfer a bar-shaped substrate A7 placed side by side on an upper surface therebetween in the direction of the arrow.

Reciprocating work positioning members 3 and 4 are provided on the left and right outer sides of the belts 1 and 2 to move forward toward the bar-shaped substrate A7 on the upper surface thereof. The belts 1 and 2 are driven by a reciprocating mechanism such as a pneumatic cylinder (not shown).
Is configured to reciprocate in a direction perpendicular to the longitudinal direction of the. Further, guide members 5 and 6 for the two belts 1 and 2 are disposed at the positions of the two work positioning members 3 and 4, respectively.
Each of the guide members 5 and 6 is reciprocated in a direction perpendicular to the longitudinal direction of the belts 1 and 2 by a reciprocating operation mechanism such as a pneumatic cylinder (not shown). It is configured such that the interval between the belts 1 and 2 is extended by outward movement.

In this case, the two guide members 5, 5
6 is performed in a state where the two work positioning members 3 and 4 are moved forward, and the outward movement of the two guide members 5 and 6 is changed to the two work positioning members 3 and 4.
The distance L between the belts 1 and 2 is regulated by the stopper screws 7 and 8 provided on the base member 4 to make the width dimension of one chip A2 larger than the length S of the rod-shaped substrate having a predetermined number of chip pieces. It is configured to expand to a dimension L1 (L1 = S−W) shorter by W. Note that L1 is
In practice, it is slightly larger than SW.

In this configuration, when the bar-shaped substrate A7 transferred on the upper surfaces of the belts 1 and 2 comes to the positions of the workpiece positioning members 3 and 4, the workpiece positioning members 3 and 4 are moved.
As shown in FIG. 7, the rod-shaped substrates A7 on the upper surfaces of the belts 1 and 2 are moved forward as shown in FIG.
Is positioned at a substantially central portion between the belts 1 and 2.

Next, as shown in FIG. 8, the guide members 5, 6 are retracted until they come into contact with stopper screws 7, 8 provided on the work positioning members 3, 4, respectively. The distance L between the belts 1 and 2 is extended to a length L1 shorter than the length S of the bar-shaped substrate A7 having a predetermined number of chip pieces by the width W of one chip piece A2.

Then, a rod-shaped substrate having a predetermined length S in which a predetermined number of chip pieces A2 are aligned among the rod-shaped substrates A7,
Since both ends are placed on the upper surfaces of the belts 1 and 2, they do not fall from between the belts 1 and 2. However, one chip piece A2 of each bar-shaped substrate A7 is missing and the length dimension is one chip piece A larger than the predetermined length dimension S.
In the bar-shaped substrate shortened by the width W in FIG. 2, the interval L between the belts 1 and 2 is one chip A2 from the length S of the bar-shaped substrate A7 having a predetermined number of chips A2. Dimension L1 shorter by width W in
As a result, both ends or one end of the rod-shaped substrate A7 fall off from the upper surfaces of the belts 1 and 2 and fall from between the belts 1 and 2. Needless to say, two or more chip pieces A2 of each rod-shaped substrate A7. The rod-shaped substrate lacking
It will fall from between the two.

Thus, when the bar-shaped substrate A7 broken from the material substrate A is transported while being placed side by side on the upper surfaces of the belts 1 and 2, at least one chip piece A2 of each bar-shaped substrate A7 is transferred. Missing items can be reliably sorted out so as to be selectively removed from the upper surfaces of both belts 1 and 2. When this operation is completed, the guide members 5, 6 advance forward to their original positions,
The two work positioning members 3, 4 are retracted to their original positions.
At the time of the backward movement, the bar-shaped substrate A7 on the upper surfaces of the two belts 1 and 2 moves together with one of the two workpiece positioning members 3 and 4 so that the distance between the two belts 1 and 2 is increased. The problem of falling off from the camera may occur.

However, this problem is caused by disposing a vertically movable pressing member 9 above the two belts 1 and 2, and using the pressing member 9 as shown in FIG. The problem can be solved by retreating the two work positioning members 3 and 4 while holding down the rod-shaped substrate A7 on the upper surface. In the above-described embodiment, the length dimension of the rod-shaped substrate A7 is selected one by one. However, the selection of the length of the rod-shaped substrate A7 may be performed one by one. By increasing the distance between the belts 1 and 2 due to the retreating movement of the guide members 5 and 6, the stopper screws 7 and 8 provided on the work positioning members 3 and 4 are used to regulate the distance. Both belts 1, 2
The advantage is that the expansion of the spacing between them can be finely adjusted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a material substrate.

FIG. 2 is a perspective view showing a state in which blank pieces on a material substrate are broken.

FIG. 3 is a perspective view showing a state in which a raw material substrate is broken into a rod-shaped substrate and a rod-shaped substrate is broken into chip pieces.

FIG. 4 is a perspective view showing a state where a side electrode film is formed on a rod-shaped substrate.

FIG. 5 is a perspective view illustrating a sorting device according to an embodiment of the present invention.

FIG. 6 is an enlarged sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a diagram showing a first operation state.

FIG. 8 is a diagram showing a second operation state.

FIG. 9 is a diagram showing a third operation state.

[Explanation of symbols]

 A Material substrate A1 Break line A2 Chip piece A7 Bar-shaped substrate 1, Belt 3,4 Work positioning member 5,6 Guide member 7,8 Stopper screw 9 Holding member

Claims (1)

(57) [Claims] 1. A pair of left and right belts for transporting a plurality of chip pieces in a row in a state of being arranged in a row on a top surface of a bar-shaped substrate. A reciprocating work positioning member that moves is disposed, and further, at a position of the two work positioning members, an interval between the two belts, a predetermined number of chips in a state where the two work positioning members are moved forward. An apparatus for selecting the length of a rod-shaped substrate, comprising an extension means for expanding the length of the rod-shaped substrate having a piece to a dimension shorter than the length dimension of one chip piece by the width dimension.