JPH0736327B2 - Filament member manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a filament member suitable for incandescent lamps for vehicles.

[0002]

2. Description of the Related Art Generally, a filament member of this type is
It is manufactured by caulking (fixing) a sleeve member to the filament end portion of a filament using an upper mold and a lower mold (Japanese Patent Application No. 2-337059). In FIG. 5, the lower die 1 has a groove side surface 1w and a flat groove bottom surface 1
A groove portion 1a defined by b is formed. Groove
1a has an inverted trapezoidal cross section whose width becomes narrower as it becomes deeper . On the other hand, the upper mold 4 faces the groove bottom surface 1b.
It has a pressing surface 4a facing it. The sleeve member 3 has a cross-sectional shape close to a perfect circle, has a slit 3a along its longitudinal direction (direction perpendicular to the paper surface), and has an outer diameter larger than the depth of the groove 1a. Further, referring to FIG. 7, the filament 2 includes a filament portion 2a and a filament end portion 2b.
And have. The method of manufacturing the filament member will be described below. Referring again to Figure 5, the filament ends 2b of the filament 2 is loaded in the groove 1a of the lower mold 1 <br/>. Then, the stocker of one (not shown) the sleeve member 3 is carried out in the groove 1a through the well-known parts feeder (not shown) which accumulates sleeve member 3, Fi
While surrounding the lament end 2b, the groove 1a
It is placed on the groove bottom surface 1b. The filament end 2b
Step of loading the inside of the groove portion 1a and the groove bottom surface of the sleeve member 3
The order of the placing steps on 1b may be reversed. Then, as shown in FIG. 6, the upper die 4 is pressed against the sleeve member 3 in a state where the filament end portion 2b is inserted into the hollow portion.
Pressure is applied by the surface 4a. Sleeve by pressure
Member 3 is pressed into the groove side surface 1w of the grooves 1a, the force in the direction tightening the slit portion 3a is applied, Sri
The tube member 3 is formed into a trapezoidal cross section and is crimped to the filament end 2b. In addition, in the present invention,
And a component of the filament member that is crimped to the end of the
The sleeve member in the finished state is called a sleeve.
In the description and the drawings used for the description, the sleeve portion
The same reference numeral 3 is used without distinguishing between the reference numerals of the material and the sleeve.
There is. As shown in FIG. 7, the filament member manufactured as described above is attached by spot-welding one of the four outer peripheral surfaces of the sleeve 3 to the side surface of the rod-shaped support body 5, thereby providing an incandescent light bulb. Is manufactured as a filament member. Incidentally, this kind of filament
Welding of sleeves to be welded to supports in parts
As a surface, usually a large contact area with the support is ensured.
A surface that can be retained is used. Therefore, in the case of FIG.
A surface of the outer peripheral surface of the leave 3 that corresponds to the long side of the trapezoidal cross section
Is the welding surface.

[0003]

By the way, in the manufacturing method of the filament member, the sleeve member 3 having the filament end 2b inserted therein is inserted into the groove bottom surface of the groove 1a of the lower mold 1.
Since the sleeve member 3 has a cross-sectional shape close to a perfect circle at the time of mounting on the 1b, it is not determined where the slit portion 3a is located in the groove portion 1a. For example, as shown in FIG.
In the sleeve member 3, the slit portion 3a is added to the upper mold 4.
It may be arranged in a state of facing directly above the pressure surface 4a.
It On the other hand, with respect to the groove bottom surface 1b of the groove portion 1a of the lower mold 1,
This type of mold is such that the pressing surface 4a of the mold 4 moves in parallel.
In the pressure processing, after pressing the sleeve member 3, that is,
The position of the slit portion 3a of the sleeve 3 is the position before pressurization.
It can be said that it will not move greatly. Therefore, in FIG.
As shown, the slit portion 3a was arranged facing upward.
As shown in FIG. 6, the sleeve member 3 faces straight up.
In this state, the filament ends 2b are fixed.
Here, the welding surface to be welded to the support 5 is as described above.
As shown in Fig. 6, it is the surface corresponding to the long side of the trapezoidal cross section.
In the filament member obtained by being completely pressed,
Slit 3 in the central area of the welding surface of sleeve 3
a will exist. And this Fira
The slit member 3a is used as shown in FIG.
When the incandescent light bulb is manufactured by spot welding the welding surface existing in the central region to the support 5 , the welding strength is lowered, and the welded portion is relatively easily damaged by vibration or shock accompanying traveling of the automobile. There is a point. An object of the present invention, vibration
Even if a motion or shock is applied, the welded part may be easily damaged.
It is an object of the present invention to provide a method for manufacturing a filament member that can obtain a filament member that does not spoil .

[0004]

According to the present invention, a filler
Ment and the end of the filament, and
A sleeve with a welding surface to be welded to the member
In the manufacturing method of the filament member,
A lower die with a groove defined by a flat groove bottom and
And an upper mold having a pressing surface facing the bottom surface of the groove.
A mold is prepared and the cross-sectional shape is flat with a long axis and a short axis.
The slit part that has a shape and extends along the longitudinal direction is the long axis.
Use the sleeve member that should become the sleeve in the direction
And meaning, the sleeve member on said groove bottom surface of the front hear mold
By placing it so that it can roll,
The sleeve member is opposed to the groove side surface, and
Insert the end of the sleeve and use the upper mold to
By pressing the material, the filament ends
The sleeve that is worn, and the sleeve
Of the surfaces in the minor axis direction of the sleeve member
Compatible with either the groove bottom surface or the pressure surface
The flattened welded surface is formed.
The manufacturing method of the component is obtained.

[0005]

In the present invention, the cross-sectional shape has a long axis and a short axis.
Slit that has a flat shape and extends in the longitudinal direction
Member to be a sleeve having a long axis
To be rollably mounted on the bottom surface of the flat groove of the lower mold.
Thus, the slit portion faces the groove side surface. On the other hand,
As shown in the figure, the pressing surface of the upper mold is parallel to the groove of the lower mold.
In the pressure processing that moves to the
The position of the slit part after pressurization has largely changed from the position before pressurization.
It does not move. After pressing, the sleeve should be
Of the faces in the minor axis direction of the leave member, the groove bottom face and
A welding surface corresponding to one of the pressure surfaces is formed.
However, the slits are formed in areas other than the central area of the welding surface.
It

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings used in the following description,
The same parts as in the conventional example or the same parts as those in FIGS.
The code is attached. FIG. 1A is a sectional view of the sleeve member 3 used in this embodiment. In FIG. 1A, the sleeve member 3 has a cross-sectional shape of a long axis (upper and lower parts in the figure) .
Direction) and a flat shape with a short axis (horizontal direction in the figure)
The slit portion 3a which is present and extends along the longitudinal direction is formed in the long axis direction.
I have it. In other words , the position where the slit portion 3a is present and the position where it faces is smaller than the overall curvature. Such a sleeve member 3 has a slit portion 3a.
Alternatively, even if the portion facing it is placed on the horizontal plane with the position directly downward or directly above, the slit portion 3a rolls and the slit portion 3a becomes horizontal.
With respect to the horizontal direction (including diagonally upward and diagonally downward). Next, a method of manufacturing the filament member according to the embodiment of the present invention will be described with reference to FIGS. First, the filament 2 is placed in the groove 1a of the lower mold 1.
The filament end 2b of is loaded. Then the sleeve
From the stocker (not shown) accumulating the members 3
The sleeve member 3 is carried out into the groove 1a through the well-known parts feeder (not shown). The sleeve member 3
Since it has the above-described shape, even when the slit 3a faces upward, for example, when it is delivered from the stocker, it is being conveyed by the parts feeder or on the flat groove bottom surface 1b of the groove portion 1a. The slit portion 3a rolls and becomes in a state of facing the lateral direction. As before, the sleeve member 3 surrounds the filament end 2b as shown in FIG.
In this state, place it on the flat bottom surface 1b of the groove 1a.
Be done. Incidentally, also in this embodiment, the filament end portion 2b
Step of loading the inside of the groove portion 1a and the groove bottom surface of the sleeve member 3
The order of the placing steps on 1b may be reversed. Subsequently, the sleeve member 3 with the filament end portion 2b inserted through the hollow portion is pressed by the pressing surface 4a of the upper mold 4. By pressing, as shown in FIG. 3, the scan
The leave member 3 is pressed by the groove side surface 1w of the groove portion 1a,
Since a force in the tightening direction is applied to the slit portion 3a, the sleeve member 3 has a trapezoidal cross section and is crimped to the filament end portion 2b. Moreover, the slit portion 3a,
Located almost laterally. That is, on the pressing surface 4a of the upper die 4,
Therefore, other than the central region of the surface formed (welded surface described later)
Located in. In addition, the three when sent from the stocker
The member 3 has a different orientation from the above example,
Even if the slit portion 3a faces downward, it can roll. In any case, the flat groove bottom surface 1 of the groove portion 1a
When it is placed on b , the slit portion 3a is in a substantially lateral direction, and in this case as well, after pressurization, the slit portion 3a is located in a region other than the central region of the welding surface described later. The filament member manufactured in this manner is used as the support 5
Surface that can secure a large contact area with respect to
Of the outer peripheral surface of the probe 3, the surface corresponding to the long side of the trapezoidal cross section is
It is used as a welding surface. Then, as shown in FIG. 4 , the welding surface is attached to the side surface of the rod-shaped support 5 by spot welding, and the incandescent light bulb is manufactured. The filament member according to the present embodiment has a slit portion 3a other than the central region of the welding surface as shown in FIG.
Excellent welding strength. In addition, the welding surface, as described above,
A large contact area can be secured for the mating member such as the support
However, depending on the shape of the lower mold, the lower mold may
It may be a region corresponding to the groove bottom surface of the groove portion of the mold. Koba
The slit area of the sleeve is outside the central area of the welding surface
Needless to say that it is located in.

1 (b) and 1 (c) are sectional views of a sleeve member 3 according to another embodiment of the present invention. These examples are modifications regarding the sectional shape of the sleeve member 3. In FIG. 1B, the sleeve member 3 has a sectional shape.
Shape is long axis (up and down in the figure) and short axis (left and right in the figure)
Direction) and has a flat shape and extends along the longitudinal direction.
It has a slit portion 3a in the long axis direction. In other words,
The area with the slit portion 3a projects outward,
On the other hand, the region facing the slit 3a also projects outward,
That is, the curvature is smaller than the overall curvature.
Therefore, even if the slit portion 3a or a portion facing the slit portion 3a faces downward or upward, the slit 3a rolls while passing through the parts feeder or in the groove portion 1a.
Turns almost laterally. In FIG. 1C, the sleeve member 3 has a long-axis (vertical direction in the figure) and short-axis cross-sectional shape.
Presents a flat diamond shape (with horizontal direction in the figure)
The slit portion 3a extending along the longitudinal direction in the longitudinal direction.
Have. In other words, the dimension of the first diagonal line in the direction facing the slit 3a is larger than the dimension of the second diagonal line orthogonal to the first diagonal line. Therefore, even if the slit portion 3a or the area facing the slit portion 3a faces downward in the stocker, the slit portion 3a rolls substantially horizontally while passing through the parts feeder or in the groove portion 1a. Also in the embodiment shown in FIG. 1 (b) and (c), after passing through the parts feeder is performed manufactured as in the first embodiment, the filament member manufactured in the welding surface of the support 5 The slit portion 3a is not located in the central area .

[0008]

EFFECT OF THE INVENTION Manufacturing Method of Filament Member According to the Present Invention
The method is defined by a groove side defined by a groove side surface and a flat groove bottom surface.
Lower mold with parts and upper with pressure surface facing the groove bottom
Prepare a mold consisting of the mold and the cross-sectional shape
It has a flat shape with a shaft and extends along the longitudinal direction.
Three that should be a sleeve with a lit portion in the long axis direction
Prepare a sleeve member and roll the sleeve member onto the bottom surface of the groove in the lower mold.
By placing it so that it can move, the slit part can be
And insert the end of the filament into the sleeve member
And press the sleeve member with the upper mold.
Form a sleeve fixed to the end of the filament.
The sleeve in the short axis direction of the sleeve member.
One of the bottom surface of the groove and the pressure surface
Since the welding surface corresponding to is formed, the central area of the welding surface
Since the slit part is not located in the
Easily welded parts due to vibrations and shocks associated with the running of a car
It is possible to obtain a filament member which is not damaged.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a sleeve member used in the present invention.

FIG. 2 is a diagram for explaining a manufacturing process of the present invention.

FIG. 3 is a diagram for explaining a manufacturing process of the present invention.

FIG. 4 is a perspective view showing a filament member manufactured by the manufacturing method of the present invention.

FIG. 5 is a diagram for explaining a conventional manufacturing process.

FIG. 6 is a diagram for explaining a conventional manufacturing process.

FIG. 7 is a perspective view showing a filament member manufactured by a conventional manufacturing method.

[Explanation of symbols]

1 Lower Die 1a Groove 1b Groove Bottom 1w Groove Side 2 Filament 2b Filament End 3 Sleeve Member 3a Slit 4 Lower Die 4a Pressurizing Surface 5 Support

Claims (1)

[Claims] 1. A filament and an end portion of the filament
It has a welding surface that is fixed to the
And a method for manufacturing a filament member having a sleeve
Defined by the groove sides and the flat groove bottom
It is equipped with a lower mold with a groove and a pressure surface facing the bottom of the groove.
Prepare a mold consisting of the upper mold and the
And has a flat shape with a short axis and extends along the longitudinal direction.
The sleeve has a slit portion extending in the long axis direction.
On the bottom surface of the groove of the lower mold.
By rotatably mounting the sleeve member on,
The slit portion is opposed to the groove side surface, and the sleeve
Insert the end of the filament into the member and place it in the upper mold.
Therefore, by pressing the sleeve member,
The sleeve fixed to the end of the filament
Together with the sleeve, the short axis direction of the sleeve member
Of the bottom surface of the groove and the pressing surface.
The welded surface corresponding to the one side or the other side is formed
A method for manufacturing a filament member, comprising: