JPS623600B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magazine for supplying circuit elements that is effective for use in an electronic equipment circuit assembly device for mounting circuit elements such as chip-type resistive elements at predetermined positions on a printed wiring board. be.

Chip-type circuit elements have traditionally been widely used in hybrid integrated circuits, etc., but when mounting such chip-type circuit elements on a printed wiring board, it has traditionally been necessary to use a numerical control device (hereinafter abbreviated as an NC device). The relative position with respect to the printed wiring board is determined, and the chip-type circuit elements are held one by one under the control of this NC device and attached to the printed wiring board with adhesive provided at predetermined positions, and then soldered and mounted. method was used.

When mounting using such an NC device, the mounting speed is limited by the speed of the pulse motor, etc., so it cannot be made very high, resulting in poor operating efficiency. Further, since the NC device is quite expensive, the entire device has become very expensive.

Therefore, there has been a strong desire to realize an apparatus for attaching chip-type circuit elements to a printed wiring board at higher speed and with a lower cost structure. As a method for effectively realizing a device that can meet such demands, a plurality of magazines in which a plurality of circuit elements are arranged in the same direction and movably stored are prepared, and the magazine is inserted through the rear opening of the magazine. The circuit elements are ejected from the front opening of the magazine using a rod, and the circuit elements ejected from the magazine are mounted on the printed wiring board at once using an adhesive provided at a predetermined position on the printed wiring board, and then soldered afterwards. It is starting to be tried.

However, when mounting circuit elements on the above-mentioned printed wiring board at once, although the mounting position of the circuit elements is determined by the arrangement position of multiple magazines with respect to the printed wiring board, the circuit elements are mounted inside the magazine. Due to the fact that the circuit elements are housed with clearance to allow movement, there may be a slight deviation between the mounting position of the circuit elements on the printed wiring board, and the accuracy of the mounting position of the circuit elements on the printed wiring board may be affected. It had the disadvantage of being bad.

An object of the present invention is to provide a magazine for supplying circuit elements that can improve the precision of the mounting position of circuit elements on a printed wiring board in an electronic device circuit assembly apparatus in which circuit elements punched out from a magazine are mounted on a printed wiring board at once. Our goal is to provide the following.

In order to achieve the above object, the circuit element feeding magazine of the present invention has a cylindrical body which is open at both ends, and a plurality of cylindrical elements stored inside the cylindrical body on two adjacent sides near one open end of the cylindrical body. The present invention is characterized in that an elastic member is provided so that the circuit element is pressed against the inner wall of the cylindrical body on the side opposite to the two adjacent side surfaces. According to this configuration, the elastic member provided on the side surface near the open end of the cylinder can elastically hold the most advanced circuit element among the plurality of circuit elements housed inside the cylinder. By pushing the rear end of the plurality of circuit elements inside the cylinder from the rear, the circuit elements can be taken out one by one from the open end. Therefore, when a plurality of magazines for supplying circuit elements of the present invention are used to mount, for example, several dozen chip-type circuit elements on a printed wiring board at once, the magazine is attached to the side surface provided with the elastic member. By using the side surface facing the printed wiring board as a reference surface and facing the printed wiring board, it is possible to improve the accuracy of the mounting position of the circuit element with respect to the printed wiring board. It is possible to assemble electronic device circuits with high reliability.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The magazine for supplying circuit elements of the present invention will be described below with reference to drawings of embodiments.

1 to 3 show an embodiment of the present invention.
In FIGS. 1 to 3, a plurality of chip-type circuit elements 9 of the same shape and type are inside a cylindrical magazine 4 having square holes and open at both ends.
For example, they are stacked one above the other in a particular direction, that is, with the end surface with the electrode attached facing the side surface, and further below the rearmost (or lowest) circuit element is the inside of the cylindrical magazine 4. A circuit that is slidably pressed against the inner wall 20 of the cylindrical magazine 4 with a required pressure contact force in order to support the circuit element at a desired position in the cylindrical magazine 4 against the weight of the circuit element. An element receiving member 19 is arranged. Further, the cylindrical magazine 4 is provided with a tip at a specific location of a magazine holder which is provided with two upper and lower lattice-shaped guide plates 7 that constitute a magazine holding mechanism below the printed wiring board 1. It is planted with the opening 5 facing upward. The outer wall 21 of the cylindrical magazine 4 is provided with a flat part that is guided by the lattice-shaped guide plate 7, and the flat part is fitted into the lattice-shaped guide plate 7, so that the cylindrical magazine 4 The shaped magazine 4 is precisely positioned in the magazine holder. Conductive foils 1a for soldering the electrodes at both ends of the circuit element 9 are provided at a predetermined interval on the lower surface of the printed wiring board 1 at a location facing the tip opening 5 of the cylindrical magazine 4. Ori,
A thermosetting adhesive 10 for attaching (temporarily fixing in this example) the circuit element 9 between the conductive foils 1a.
is attached. The tips 13a of the pins 13 arranged so as to coincide with the centers of the respective grids of the lattice-shaped guide plate 7 are inserted into holes 16a provided in the receiving plate 16 that receives the lower end of each of the cylindrical magazines 4. , can be freely moved in and out of the cylindrical magazine 4 through the rear end opening 6.

As shown in FIG.
By engaging as shown in the figure, the cylindrical magazine 4 is accurately positioned in the longitudinal direction of the cylindrical magazine 4 with respect to the magazine holder, and unnecessary detachment of the cylindrical magazine 4 is also prevented. . Therefore, the entire length of the cylindrical magazine 4 and the rear end opening 6
By accurately machining the distance from to the protrusion 24, the distance between the printed wiring board 1 and the tip opening 5 can be determined accurately. In this case, it is sufficient that the protrusions 24 protrude to the same extent as the thickness of the lattice of the lattice-shaped guide plate 7, and the plurality of cylindrical magazines 4
There is no problem in arranging them adjacent to the lattice-shaped guide plate 7. In addition, cylindrical magazine 4
The internal square hole size is provided with sufficient clearance to prevent the circuit element 9 from clogging in the magazine. To this end, as shown in FIG.
There are 3. Since the circuit element 9 is always positioned at a fixed position by the leaf springs 22 and 23, the circuit element 9 can be mounted at a predetermined position on the printed wiring board 1 with high precision. Moreover, if such leaf springs 22 and 23 are provided, the cylindrical magazine 4
Even when the tip opening 5 of the circuit element 9 is on the bottom, the circuit element 9
Since the printed wiring board 1 is not unnecessarily dropped from the cylindrical magazine 9, it is possible to easily create an apparatus in which the printed circuit board 1 is disposed below the cylindrical magazine 4 and the circuit elements 9 are attached. It is also possible to realize this. In addition, since the chip type circuit element 9 is extremely small and lightweight, for example on the order of several millimeters, when the circuit element 9 is pressed against the printed wiring board 1, slight dirt or dust on the circuit element 9 may cause damage to the circuit element 9.
In some cases, more than one circuit element is attached to the printed wiring board 1 in a pinched manner. For this reason, the third
As shown in the figure, when the most advanced circuit element 9' of the circuit elements 9 housed in the cylindrical magazine 4 is pressed against the printed circuit board 1, the leaf springs 22 and 23 described in FIG. The pressure is applied to the circuit element 9'' immediately after the most advanced circuit element 9'.
This makes it possible to install only one circuit element.

In addition, as illustrated in FIG.
If a convex portion 25 is provided in a part of the cylindrical magazine 4, and a groove 26 into which the convex portion 25 can be movably fitted is provided in the inner wall 20 of the cylindrical magazine 4 along the transfer direction of the circuit element 9, the circuit element holder can be The member 19 is guided by the groove 26 and moves directly within the cylindrical magazine 4. Therefore, for example, the circuit element receiving member 19 may be formed by bending a strip spring having a width W smaller than the length L of the circuit element 9 into a wedge shape as shown in the figure, and, for example, the plate spring 22 When the circuit element receiving member 19 is placed in pressure contact with the inner wall 20 of the cylindrical magazine 4 on the side where the cylindrical magazine 4 is not provided, there are few remaining circuit elements 9 in the cylindrical magazine 4. Even if it gets old, the leaf spring 22
Since the circuit element 9 is not unnecessarily pushed outward by the circuit element receiving member 19, it is possible to prevent the circuit element 9 from being displaced.

As described in detail above, according to the present invention, the elastic members provided on the two adjacent side surfaces near one open end of the cylindrical body with both ends open are connected to the plurality of circuits housed inside the cylindrical body. Only the foremost element among the elements is brought into pressure contact with the inner wall of the cylindrical body on the opposite side to the two adjacent side surfaces provided with the elastic member, and the plurality of elements housed in the cylindrical body are brought into contact by this elastic member. By pushing the plurality of circuit elements housed inside from the other open end side of the cylindrical body, it is possible to elastically hold only the first circuit element among the circuit elements of the cylindrical body. Circuit elements can be reliably taken out one by one. Further, there is an advantage that the force for pushing the plurality of circuit elements from the other open end side of the cylindrical body can be small. Moreover, since the cylindrical body has a square-shaped hole, the circuit element that is pressed by the elastic members provided on the two adjacent side surfaces near the open end of the cylindrical body is affected by the elasticity of the square-shaped hole. The inner wall surface opposite to the inner wall surface on which the member is provided can be used as a reference surface to correspond to the printed wiring board, thereby making it possible to reliably mount the circuit element at a predetermined position on the printed wiring board with less misalignment. has advantages.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a main part of a magazine according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of a main part of the magazine, and FIG. 3 is an enlarged longitudinal cross-sectional view of a main part of the magazine.
FIG. 4 is a partially cutaway enlarged perspective view of another embodiment of the present invention. 4... Cylindrical magazine, 5... Tip opening, 6...
...Rear end opening, 9, 9', 9''...Circuit element, 20
...Inner wall, 22, 23... Leaf spring.

Claims (1)

[Claims] 1. On two adjacent side surfaces near one open end of a cylindrical body having a rectangular hole and open at both ends, the first one of the plurality of circuit elements housed inside the hole of the cylindrical body is A magazine for supplying circuit elements, characterized in that an elastic member is provided so as to be pressed against the inner wall of a hole in a cylindrical body on the side opposite to two adjacent side surfaces.