JPS6015144B2 - Lead wire welding equipment for ceramic capacitors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lead wire welding device for ceramic capacitors, and more specifically, the present invention relates to a lead wire welding device for ceramic capacitors, and more specifically, the present invention relates to a lead wire welding device for ceramic capacitors. This invention relates to a device for welding lead wires to terminals provided at both ends of a capacitor element obtained by applying the same method.

Before explaining the lead wire welding device for a ceramic capacitor according to the present invention, the sub lead wire welding means will be briefly described in order to bring out the features of the present invention.

The conventional lead wire welding means is made of tubular type ceramic, as is clear from the simulated explanatory diagrams shown in Fig. 1a (front view of the welding device) and Fig. 1b (side view on line al-1 in Fig. 1). A capacitor element A consists of a capacitor element 1' in which a predetermined electrode is attached to a dielectric material made of silver plating or the like, and cap-shaped terminals 2' attached to both ends of this capacitor element 1'. ' is first inserted into the V-groove 4' of the holding member 3' fixed on the board B', and then the upper surface of the terminal 2' is pressed by the presser member 5' to release the V-groove 4' and the presser part dent 5'. and terminal 2' contact lines X', X'' and Y
By holding the terminal 2' between the terminals 2' and 2', the entire element body A' is tightened, and then the lead wire 7' is tightened by the operation of the gripping member 6' of the lead wire 7' operated by a welding device (not shown). 7' was welded to the bottom of terminal 2'.

In the drawings, symbol ○ represents a welding circuit, X' and X'' represent a contact line between the side wall of the terminal 2' and the V-groove, and Y represents a contact line between the side wall of the terminal 2' and the holding member 5'. In the case of the conventional example mentioned above,
As is clear from the cross-sectional explanatory views showing the holding state of the terminal 2' shown in FIGS. 2a and 2b, in the case of FIG. is asymmetric, the constant force P' applied to the holding member 5'
Therefore, a physical deformation occurs in the radial direction between the two, and the element 1', which is relatively vulnerable to the pressing force in the radial direction, is destroyed.

In addition, as shown in FIG. 2b, even if the terminal 2' and the capacitor element 1' are in a matching state (dashed line diagram), the gripping member 6' may not be able to If the welding pressure P'' is greater than the axial holding force obtained by the tightening force P', the terminal 2' will be lowered from the predetermined mating position, and as a result, the end 1 of the body 1'
1' is inserted deeper into the cap type terminal 2',
The end portion 11' is forced to physically deform in the radial direction by the rounded portion 21' of the bottom surface of the terminal 2', and the element 1' is destroyed in the same manner as described above.

As is clear from the above examples, the present invention is based on the fact that the cause of destruction of the capacitor element in conventional devices is that the holding pressure and welding pressure applied to the terminal when connecting the lead wire to the terminal are transmitted to the entire capacitor element. In view of the fact that this occurs in the process, technical measures must be taken to ensure that neither the holding force applied to the terminal to secure the element body nor the welding pressure applied to the terminal during lead wire welding have any effect on the capacitor element. The aim is to prevent element destruction by providing

A specific embodiment of the invention will be described in detail below with reference to FIG. 3 and FIG. 4, which shows a side view of FIG.

The 1"-wire welding device for the ceramic capacitor of the present invention is arranged to face a fixing member 3 fixed to a substrate B and both sides of the fixing member 3, and pivot in the left-right direction on the substrate B. Two holding members 5 formed to fit
and 5, and a gripping member 6 for a lead wire 7 which is activated in response to the operation of a welding device (not shown). Note that the drawing symbol S represents a stopper of the holding member 5. The head of the fixing member 3 is provided with a V-shaped storage groove 4 for storing a capacitor element 1 (described later), and the upper part of the holding member 5 is provided with terminals 2 provided at both ends of the capacitor element 1. and 2 are provided.
Since the two holding members 5 and 5 have the same structure as the terminals 2 and 2, one of the holding members and the terminal will be described below. This holding part 81 is provided with a holding groove D for holding the terminal 2 in a mated state, and an insertion hole 9 for the cord wire 7 provided in the bottom wall of the holding groove D. Holding groove D
A lower arcuate portion 12 is formed at the lower portion of the peripheral wall 11 and is connected thereto and projects outward.

Further, the boundary E of the connecting portion is positioned slightly below the horizontal plane including the center of the holding groove D. (
(See symbol C' in FIG. 4) Also, the lower part of the holding member 5 is attached to the substrate B.
It is pivotally supported by a known sliding mechanism such as a dovetail groove so that it can slide in the left and right directions on the top.

Furthermore, the holding members 5 and 5 are restricted from retreating by a stopper S so that the distance between them does not exceed L at the maximum. The lead wire welding device of the present invention is composed of the above-mentioned members, and the operation thereof will be explained below with reference to FIGS. 3, 4, and 5.

FIG. 3 is a partial cross-sectional view showing the state in which the capacitor body A is mounted on the lead wire welding apparatus of the present invention. A capacitor body A formed by attaching cap-type terminals 2 to both ends of an attached capacitor element 1
is a state in which the side wall 14 of the terminal 2 constituting this is held by the arcuate wall 12' of the lower arcuate portion 12 of the recessed groove D, and between the upper end surface 16 of the terminal 2 and the side end surface 17 of the fixing member 3. Furthermore, the outer surface of the capacitor element 1 constituting the substrate A is spaced from the surface of the V-shaped groove 4 of the fixed part village 3 by a small gap h, and Almost the entire element 1 is housed in the V-shaped groove 4 and is sent between the holding members 5 and 5.

However, in this Hagi layer state, the small gap h between the outer surface of the capacitor element 1 and the surface of the V-shaped groove 4 is smaller than the wall thickness of the side wall of the terminal 2 (h'>h). The height of the holding village has been adjusted.

Next, as a second step, the element body A is held in place in the first step, and one of the two holding members 5 and 5 is pivoted in the direction of arrow F by an operating means (not shown). As a result, the holding member 5 first slides the side wall 14 of the terminal 2 in the holding member D, as is clear from the action explanatory diagram when cross-sectionally taken along the line m-m in Fig. 3 shown in Fig. 5. and then
The terminal 2 is further moved in the direction of the arrow F while pushing the bottom surface 15 of the terminal 2 using the bottom wall 101 of the special groove D. However, in the above movement, the upper end surface 16 of the terminal 2 is moved to the side end surface 17 of the fixed member 3.
(As mentioned above, the end wall thickness h' of the upper end surface 16 is larger than the gap h), the movement of the upper end surface 16 is forcibly stopped, and the position adjustment for this stop is done by adjusting the axis of the terminal 2. This is done by stopping the operation of the holding member 5 when the pressing force in the direction reaches a predetermined pressure. Each of the above operations (
When the first step and the second step) are performed, the terminal 2 lacquered to the capacitor body A, as shown in the fifth figure,
The side end surface 17 of the storage groove 4 of the fixing member 3 and the bottom wall 10L of the holding groove D of the holding member 5 push the bottom surface 15 and the top end surface 16 of the terminal 2 in the direction of the vehicle and are held between them. .

In this case, the terminal 2 is held by pressing the bottom surface 15 against the bottom wall of the holding groove D and the upper end surface 16 by the side end surface 17 of the holding groove 4. Bottom 1
5 and the upper end surface 16, the center G of the pressing and clamping portion is located below the horizontal plane containing the center of gravity C of the terminal 2, as shown by the diagonal lines in FIG. There is.

(See reference numeral C'' in FIG. 4) The terminal 2 has its side wall 14 held by the cylindrical side wall 11 of the holding groove D in a mating state.

In the case of the above-mentioned chivalry state, special attention should be paid to terminal 2.
This means that the capacitor element 1 connected to the terminal 2 is not affected by the tightening force applied to the terminal 2 at all. As the third step, the gripping member 6 of the lead wire 7 is operated in the direction of arrow f with respect to the terminal 2 tightly held as described above, and the terminal is exposed in the insertion hole 9 of the lead wire 7. 2
The lead wire 7 is welded to the bottom surface 15 by operating a welding machine (not shown).

The means for welding the lead wire 7 to the other terminal 12 attached to the other end is exactly the same as the method described above, and its explanation will be omitted.

The present invention has the above-described structure, produces the above-mentioned effects, and therefore has the following unique effects.

By incorporating the welding device of the present invention into the next process of the automatic manufacturing device up to the capacitor body A, the welding device of the present invention can make the manufacturing of the entire capacitor part a consistent assembly line, contributing to the automation of the device. be. That is, the welding device of the present invention is installed in, for example, a conveyor transfer device or a rotary transfer device, and the 1”-de wire is automatically welded to the capacitor body A here, and then transferred to a process such as a coating device, etc. It can be automated. In this device, the element body A transferred from the previous process is placed on the side walls 14 of the terminals 2, 2 of the capacitor element 1 on the circular arc parts 12, 12 formed so as to protrude into the holding grooves D of the two holding members 5, 5. , 14, the subsequent welding is automatically performed, and there is no need to adjust the position of the holding members 5, 5 when receiving the body A.

When the lead wire 7 is welded to the terminal 2 using the present invention, the capacitor element 1 is completely unaffected by the tightening force and welding pressure applied to the terminal 2, so the forming material of the element 1 is ceramic. Even fragile materials such as these will not be damaged.

Since the side wall 14 of the terminal 2 is held on its entire circumferential surface by the cylindrical side wall 11 of the holding groove D in a sliding manner, the terminal 2 is held in the axial direction by the fixing part village 3 and the holding member 5. Power,
Alternatively, the distortion and deformation of the terminal in the radial direction caused by the application of welding pressure in the direction of the welding machine is prevented, and as a result, no radial compressive pressure is generated on the capacitor element 1, thereby damaging the element 1. Never. Since the storage groove 4 of the fixing member 3 has a V-shaped cross section, it has a holding groove D corresponding to the size of the terminal 2 of the capacitor element 1, regardless of the diameter of the capacitor element 1. By selecting the holding member 5 such that the gap between the capacitor element 1 and the V-shaped groove 4 is h, a single fixing member 3 can be used.

The common contact surface of the bottom wall 10 of the holding groove D with respect to the bottom surface 15 of the terminal 2 and the side wall 17 of the storage groove 4 with respect to the top end surface 16 of the terminal 2 is the portion represented by the intersecting line in FIG. Since the contact center G is located below the axial center C of the body A, when a tensile force is applied to the axis of the body A, an upward swinging moment is generated for the terminal 2. The swinging of the terminal 2 based on the swinging moment is caused by the cylindrical side wall 11 of the holding groove D.
This is prevented and there is no effect on the element 1 at all.

Other embodiments of the invention are described below with reference to FIGS. 3 and 7. In this case, the centers of the contact surfaces between the bottom surface 15 and the top surface 16 of the terminal 2, which is held between the fixing member 3 and the holding member 5, The reason is that it is made to exist in the same plane as C (which coincides with the centroid).

Fig. 6 is a partial sectional view of the main part showing this embodiment, Fig. 7a
and FIG. 7b are cross-sectional views taken along lines V-V and W- in FIG.

As is clear from both figures, a storage groove 4' having a U-shaped cross section is provided in the upper part of the fixed part village 3, and the capacitor element 1 is placed in the groove U of this U-shaped storage groove 4'. The gap is such that a small gap h is created between the two when stored in the groove 4'.

(See Fig. 7) A holding part 8' is provided on the upper part of the holding member 5, and the holding part 8' has a U-shaped cross section and holds a terminal 2, as shown in Figs. 6 and 7a. A circular groove P' for holding the lower semicircumference of the U-shaped circular circular wall 11', and two holding arms 13' and 1 connected to the circular circular circular wall 11'.
3'.

Therefore, in this embodiment, the terminal 2 is connected to both the members 3 and 5.
Terminal 2 has its bottom surface 15
with a circular arc groove 〇 and two holding arms 13' and 1 connected to this.
3' and the upper end surface 16 is pressed and held by the side end surface 17 of the U-shaped storage groove 4', but at that time,
The pressing and clamping portion common to the bottom surface 16 and the upper end surface 16 of the terminal 2 is arranged so that the center C' of the pressing and clamping portion is aligned with the axis C of the terminal 2, as shown by the diagonal lines in FIG. 7a and b. horizontal plane GI including
′.

In this embodiment, with the above configuration, the terminal 2 is tightened between the fixing member 3 and the holding member 5 by a physically stationary and balanced axial pressing ball holding force with respect to the axis DC. This feature eliminates the need for a holding member from above. It should be noted that the present invention is not limited to the above-mentioned embodiments.
The holding part 8 or 8 of the holding member 5 is connected to the terminal 2 provided at the end of the capacitor element 1 through the bullet barrel body inside.
It goes without saying that the present invention also includes a structure in which the side wall 14 of the terminal 2 is held by the terminal 2 and the terminal 2 is held between the members 3 and 5.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams simulating a conventional device; FIGS. 3, 4, and 5 are cross-sectional explanatory diagrams showing the main parts and operating states of the present invention; and FIGS. FIG. 7 is an explanatory sectional view of a main part showing another embodiment of the present invention. The symbols in the drawings are 1... capacitor element, 2...
Terminal, 3... Fixed part village, 4 and 4'... Storage groove, 5
...Holding member, 6...Gripping member, 7...Lead wire, 8 and 8'...Holding part, A...Capacitor body, C.
・Axis center of terminal 2 and holding groove D or ○, D and ○...
・Holding groove, G and 〇...bottom surface 15 and top surface 1 of terminal 2
6 respectively represent the center of pressure applied to the clamped portion by the fixing member 3 and the holding member 5. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. A fixing member 3 fixed to the substrate B, a holding member 5 opposed to the side surface of the fixing member 3 and pivotally supported so as to be slidable on the substrate B, and a welding machine for operation. The head of the fixing member 3 is provided with a storage groove 4 having a V-shaped cross section, and the upper part of the holding member 5 is used for pressing and clamping the terminal 2. A lead wire welding device for a ceramic capacitor, comprising a holding part 8 having a holding groove D such that the center G of the part is located at a lower end than the axis C of the terminal 2. 2. A fixing member 3 fixed to the board B, a holding member 5 facing the side surface of the fixing member 3 and pivotally supported so as to be able to slide on the board B, and a lead that operates in response to the operation of the welding machine. The head of the fixing member 3 is provided with a storage groove 4' having a U-shaped cross section, the terminal 2 is pressed on the upper part of the holding member 5, and the center G' of the clamping part is the terminal A circular arc groove 'D that is located almost immediately within a plane that includes the axis C of No. 2.
1. A lead wire welding device for a ceramic capacitor, characterized in that a holding portion 8' is provided. 3. A fixing member 3 fixed to the board B, a holding member 5 pivoted opposite to the side surface of the fixing member 3 so as to be able to slide on the board, and a lead that operates in response to the operation of the welding machine. The head of the fixing member 3 is provided with a storage groove 4 with a V-shaped cross section or a storage groove 4' with a U-shape, and the upper part of the holding member 5 is provided with a holding groove D. or a holding part 8' having an arcuate groove D' is provided, and the fixing member 3 is
The top end surface 16 of the terminal 2 is attached to the side wall 17 of the terminal 2, and the bottom surface 15 of the terminal 2 is attached to the bottom wall 10 of the holding groove D or the bottom wall 10' of the circular arc groove D'.
The terminal 2 is held between the above-mentioned fixing member 3 and the holding member 5 by bringing them into contact with each other, and also between the surface of the capacitor element 1 integrated with the terminal 2 and the surface of both the above-mentioned storage grooves 4 and 4'. 1. A lead wire welding device for a ceramic capacitor, characterized in that the lead wire welding device is configured to have a small gap h between the two.