JPH087849A - Lead wire lifting device in incandescent lamp manufacturing process - Google Patents

Abstract

PURPOSE:To prevent the breaking of an exhaust pipe, by making the length of the ends of lead wire lifting pieces shorter than the diameter of the exhaust pipe, and their bending angle larger than a specific angle, as well as forming the tips of the lifting pieces in a hook form by bending. CONSTITUTION:A glass ball 2 whose positioning is finished is delivered as loaded on a glass ball holding member 12, and outer lead wires 4c and 4c exposed downward from the lower end of the glass ball holding member 12, and an exhaust pipe 10 pass between the walls 17 and 17 of a lead wire lifting device 16. As a result, the outer lead wires 4c and 4c are caught to the hooks 18b, 18b... of lead wire lifting pieces 18, 18... which are projected from the opposing surfaces 17a, and 17a of the walls 17 and 17, so as to be bent more than 90 deg. to the rear side in the moving direction of the manufacturing line, and they are removed from the exhaust pipe 10. Since the length L1 of the tips 18a... of the lead wire lefting pieces 18... is shorter than the diameter L2 of the exhaust pipe 10, the exhaust pipe 10 is never caught to the hooks 18b..., and it is never broken.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for raising a lead wire in a manufacturing process of an incandescent light bulb. It is something to offer.

[0002]

2. Description of the Related Art In the process of manufacturing an incandescent light bulb, a lead wire, a filament, etc. are arranged inside, and an exhaust pipe connecting the inside and the outside of the glass ball from the bottom to the bottom of the glass ball is exhausted and filled with gas. For the purpose of sealing, it is necessary to pull the lead wire upward and separate it from the exhaust pipe so as not to melt the lead wire when the exhaust pipe is melted.

FIG. 11 schematically shows a conventional lead wire pulling device.

Reference numeral a denotes a lead wire pulling device, which is a brush-like thin wire d from the opposing surfaces of the wall portions b, b and c, c extending in parallel toward the center, respectively. , D, ... are a number of piano wires e, e, ... projected obliquely forward from the wall portions c, c.

As shown in FIG. 12, the tips of the piano wires e, e,... Are hook-shaped portions f slightly bent rearward.

By passing the lead wires h, h extending downward from the lower end of the glass bulb g and the exhaust pipe i between the walls b, b and c, c, the wires d, d ,. , Or hooked on the hooked portion f of the piano wires e, e, ..., and bent upward.

[0007]

By the way, in the above-mentioned lead wire pulling apparatus, the wires d, d, ...
, Or the piano wires e, e, ... Since the lead wires h, h of the glass bulb g and the exhaust pipe i are passed between them, the wires d, d ,. There is a problem that the probability of pulling up the lead wires h and h is poor unless they are strongly pressed against ... And that the exhaust pipe i is sometimes broken if strongly pressed.

Therefore, as shown in FIG. 13, it is conceivable to increase the bending angle of the hooks k, k,... At the tips of the piano wires j, j,. Then, there is a problem that the probability that the exhaust pipe i is hooked by the hooks k, k,... Increases, and the accident that the exhaust pipe i is broken increases.

[0009]

SUMMARY OF THE INVENTION Accordingly, a lead wire pulling device in a manufacturing process of an incandescent lamp according to the present invention is a lead wire made of a piano wire or the like from the opposing surfaces of two walls extending in parallel toward the center. A large number of wire pulling pieces are protruded and arranged, and the tip of the lead wire pulling piece is bent to form a hook, and the length of the tip is shorter than the diameter of the exhaust pipe of the glass bulb, and The bending angle is set to be larger than 90 degrees.

[0010]

Therefore, in the lead wire pulling device in the manufacturing process of the incandescent lamp of the present invention, the lead wire can be reliably hooked on the hook-shaped portion and pulled up.

Moreover, there is no need to press hard and the exhaust pipe is not structurally caught on the exhaust pipe, so that the exhaust pipe does not break.

[0012]

The details of the lead wire pulling device in the process of manufacturing the incandescent light bulb of the present invention will be described below with reference to the illustrated embodiments.

1 is an incandescent light bulb manufactured by using a lead wire pulling device in the process of manufacturing the incandescent light bulb of the present invention,
Reference numeral 2 denotes a glass ball, and 3 denotes a base fitted and attached to the glass ball 2.

Reference numerals 4 and 4 denote lead wires, and portions 4a and 4a in the glass ball 2 serve as internal lead wires.
Parts 4c and 4c protruding outside of the
The internal lead wires 4a, 4a and the external lead wires 4c,
An intermediate portion between the lead wires 4c is an intermediate lead wire 4b.

Each of the lead wires 4 is an internal lead wire 4a made of a nickel wire and an intermediate lead wire 4 made of a dumet wire.
and three external lead wires 4c made of copper wire are connected in a straight line by spot welding.

One outer lead wire 4c is connected to a cylindrical outer shell 5 of the base 3, and the other outer lead wire 4b is connected to the rear end of the outer shell 5 via an insulator 6. It is connected to the attached power supply terminal 7.

Reference numeral 8 is a filament, which is an internal lead wire 4.
a, 4a are stretched between the tip portions.

Further, 9 is a glass tube in which the lead wires 4 and 4 are held by the pinch seal portion 9a at the upper end inside the glass bulb 2, and 10 is an exhaust tube.

Hereinafter, the steps of manufacturing the incandescent lamp 1 having the above-described configuration will be described step by step.

That is, after the lead wires 4, 4 and the exhaust pipe 10 are assembled in the glass tube 9, the glass tube 9 and the exhaust pipe 10 are heated and fused so as not to block the exhaust hole, and the pinch seal portion is formed. 9a, the inner lead wire 4b at the upper end of the glass tube 9;
By pinching and sealing the portion where 4b is located, the lead wires 4, 4, the glass tube 9, and the exhaust tube 10 are integrated.

Then, the ends of the inner lead wires 4a, 4a are bent, and both ends of the filament 8 are sandwiched and installed, and then the glass ball 2 is put on the filament 8 to cover the lower end portion of the glass tube 9 and the glass ball 2. The lower end is heat-fused and integrated,
The state shown in FIG. 2 is obtained.

At this stage, the external lead wires 4c, 4c and the exhaust pipe 10 extend downward from the lower end of the glass bulb 2 so as to protrude further downward. It is in a state of communicating through the line 10.

In the next step, the air inside the glass bulb 2 is evacuated, argon gas or the like is sealed, and the exhaust pipe 10
2 is a step of fusing the lower end of the glass bulb 2 to make the inside of the glass bulb 2 in a hermetically sealed state. However, if the lower part of the exhaust pipe 10 is heated by a burner or the like in the state shown in FIG. This causes a problem that the external lead wires 4c, 4c are also fused at the same time.

Therefore, it is necessary to pull up the external lead wires 4c, 4c upward so as not to be exposed to a flame such as a burner, and a so-called lead wire pulling step is performed by using a lead wire pulling device described later.

By the way, prior to the lead wire pulling step, the external lead wire 4c,
In order to process 4c accurately and efficiently, it is necessary to position the glass bulb 2 in the moving direction of the manufacturing line during the process, that is, to arrange the external lead wires 4c and 4c in the same direction. Carry out the process.

Reference numeral 11 schematically shows a positioning device used in the first positioning step. A large number of substantially block-shaped glass ball holding members 12, 12,... It is something that is sent.

A holding hole 13 having an inner diameter slightly smaller than the outer diameter of the glass ball 2 is formed at the center of each glass ball holding member 12 so as to penetrate from the upper surface 12a to the lower surface 12b. The portion 13a on the upper surface 12a side is a tapered portion whose opening diameter gradually becomes smaller toward the lower side and follows the shape of the lower portion of the glass ball 2.

The upper and lower thicknesses of the glass ball holding member 12 are such that when the glass ball 2 is held in the holding hole 13, the lower end of the glass ball 2 is located at substantially the same position as the lower surface 12b, and the external leads 4c, 4c and the exhaust gas are exhausted. The thickness is such that the tube 10 projects downward from the lower surface 12b.

Reference numerals 14 and 14 denote magnets attached and fixed to the upper surface 12a of the glass ball holding member 12 in the vicinity of the opening edge of the holding hole 13 so as to face each other with the holding hole 13 interposed therebetween.
As shown in FIG. 4, the arrangement positions of 4 and 14 are the moving directions of the manufacturing line in the positioning step (indicated by arrows in the figure).
The positions are the front side and the rear side.

Positioning device 1 having the above configuration
Glass bulb 2 on the external lead wires 4c, 4c and exhaust pipe 1
When the external lead wires 4c, 4c and the exhaust pipe 10 are placed so as to be inserted into the holding hole 13 by an automatic or manual appropriate method with the side where the 0 protrudes downward, the lower surface 12b of the glass ball holding member 12 is placed. The exhaust pipe 10 and the external lead wires 4c, 4c protrude further downward from the holding hole 13.

When the lower end of the exhaust pipe 10 is pressed slightly upward by, for example, a vertically movable jig 15 (not shown), the glass bulb 2 is floated in the holding hole 13 and, as described above, is made of nickel. Internal lead wires 4a, 4
Since a is attracted by the magnetic forces of the magnets 14 and 14, respectively, the entire glass ball 2 rotates, and as shown in FIGS. 4 and 5, the arrangement direction of the lead wires 4 and 4 and the exhaust pipe 10 is the moving direction of the manufacturing line. Then, the upward pressing by the vertical movement jig 15 is released, and the direction of the glass ball 2 is fixed in this state.

Next, a so-called lead line dividing step for raising the external lead wires 4c, 4c is performed.

That is, the lead wire pulling apparatus 1 shown in FIG.
6 is used to pull up the external lead wires 4c and 4c.

The lead wire pulling device 16 has two wall portions 17, 17 extending parallel to the moving direction of the manufacturing line, and the surfaces 17a, 17 of the wall portions 17, 17 facing each other.
From a, a number of lead wire pulling pieces 1 composed of a piano wire
, 18 are protruding obliquely forward with respect to the moving direction of the manufacturing line.

Then, the lead wire lifting pieces 18, 18,
Are bent so that the angle θ forms an angle of 90 degrees or more, and the hook-like portions 18b, 18b,. Formed and the length L1 of the tips 18a, 18a,...
Is shorter than the diameter L2 of the exhaust pipe 10 of the glass bulb 2.

That is, in the incandescent lamp 1 of the present embodiment, since the diameter L2 of the exhaust pipe 10 is about 2.7 mm, the length L of the tip portions 18a, 18a,.
1 should be 2.7 mm or less, and the optimal value is
It is in the range of 0.5 to 1.25 millimeters.

Then, the glass ball 2 whose positioning has been completed in the positioning step is sent while being mounted on the glass ball holding member 12, and the external lead wires 4 c, 4 c exposed downward from the lower end of the glass ball holding member 12 and The exhaust pipe 10 passes between the walls 17, 17 of the lead wire pulling device 16.

Then, as described above, the hook-shaped portions 18b, 18b, ... Of the lead wire pulling pieces 18, 18, ... Protruding from the opposed surfaces 17a, 17a of the wall portions 17, 17.
The external lead wires 4c, 4c are hooked on the
As shown in FIG. 3, the sheet is bent rearward in the moving direction of the manufacturing line and separated from the exhaust pipe 10.

At this time, the lead wire pulling piece 18,
There is a possibility that the exhaust pipe 10 may be caught in the same manner as in FIGS. 18,..., But as described above, the distal end portions 18a, 18a,.
Since the length L1 of the exhaust pipe 10 is shorter than the diameter L2 of the exhaust pipe 10, the exhaust pipe 10 has hooked portions 18b, 18b ,.
・ ・ It will not be caught on.

Next, after the glass bulb 2 has been subjected to the evacuation and gas filling steps, the exhaust pipe 10 is heated and melted and sealed to form the glass bulb 2A shown in FIG.

Then, before the molding step of molding the external lead wires 4c, 4c into a predetermined shape in order to assemble and electrically connect the glass ball 2A to the base portion 3, the glass ball 2A is again provided.
The positioning process is performed.

In the second positioning step,
Since the exhaust pipe 10 is blown short, the method of levitating the glass ball 2A using the exhaust pipe 10 cannot be used as described above. Therefore, the method of levitating the glass ball 2A is different from the above method. The following different methods are used.

That is, 19 is a positioning device used in the second positioning step, and a large number of substantially block-shaped glass ball holding members 20 having the same basic shape as the glass ball holding member 12 are arranged. It is designed to be sent on the production line.

A holding hole 21 penetrating from the upper surface 20a to the lower surface 20b and having a size smaller than the outer diameter of the glass ball 2A is formed in the center of each glass ball holding member 20, and the upper surface 20a of the holding hole 21 is penetrated. The side portion is a tapered portion 22 whose opening diameter gradually decreases toward the lower side so as to follow the shape of the lower portion of the glass ball 2A.

As shown in FIG. 9, the tapered portion 22 is provided with several air outlets 23, 23,..., And an air supply hole provided on the side surface of the glass bulb holding member 20. The air supply hole 24 is connected to a compressor (not shown) or the like.

Incidentally, 25, 25 are holding holes 21 in the upper surface 20a.
Are magnets attached and fixed so as to be opposed to each other in the vicinity of the opening edge of the glass ball holding member 12 so as to face each other with the holding hole 21 interposed therebetween.
It is not particularly limited like the arrangement direction of
External leads 4c, 4c of each glass bulb 2A on the production line
It suffices that the directions of are aligned in a fixed direction.

In order to position the glass ball 2A by the positioning device 19, first, the glass ball 2A is held in the holding hole 21 by an appropriate method, either automatically or manually, with the direction where the external lead wires 4c, 4c project downward. Taper part 22
Place on.

The air outlets 23, 23,...
When air is evenly blown out with an appropriate pressure, the glass ball 2A floats in the holding hole 21, and as described above, the nickel internal lead wires 4a, 4a are attracted by the magnetic force of the magnets 25, 25, respectively. As a result, the whole glass ball 2A rotates, and as shown in FIG.
Since the direction of the glass sphere 2A, that is, the lead wires 4 and 4 is parallel to the moving direction of the manufacturing line, for example,
The blowing of the air is stopped, and the direction of the glass ball 2A is fixed.

The supply of the air may be performed intermittently instead of continuously, so that the positioning operation can be performed more quickly.

Finally, the glass ball 2A in which the positions of the external lead wires 4c and 4c are aligned in a predetermined direction by the positioning step is transferred to the base portion 3 through the molding step of the external lead wires 4c and 4c. Assembly and electrical connection are done,
Completed as incandescent light bulb 1.

[0051]

As is apparent from the above description, the lead wire pulling apparatus in the manufacturing process of the incandescent lamp of the present invention is applicable to the manufacturing process of an incandescent lamp in which a filament and a lead wire are arranged inside a glass bulb. A lead wire pulling device to be used, wherein a plurality of lead wire pulling pieces made of a piano wire or the like are protruded and arranged from respective opposing surfaces of two wall portions extending in parallel toward a center direction, and a tip of the lead wire pulling piece is provided. The portion is bent to form a hook-like portion, the length of the tip portion is shorter than the diameter of the exhaust pipe of the glass bulb, and the angle of bending is greater than 90 degrees. I do.

Therefore, in the lead wire pulling device in the manufacturing process of the incandescent lamp of the present invention, the lead wire can be reliably hooked on the hook-shaped portion and pulled up.

Moreover, there is no need to press strongly, and the exhaust pipe is not structurally hooked, so that the exhaust pipe does not break.

It should be noted that the specific shapes and structures shown in the above-mentioned embodiments are merely examples of the implementation of the present invention, and the technical scope of the present invention is limited by these. Is not to be interpreted.

[Brief description of drawings]

FIG. 1 is a side view showing an incandescent lamp manufactured using a lead wire pulling device in a manufacturing process of the incandescent lamp of the present invention.

FIG. 2 is a side view of a glass bulb before sealing.

FIG. 3 is a side view of the glass bulb after sealing.

FIG. 4 is a plan view showing a state in which the glass ball holding member is viewed from above in the first positioning step.

FIG. 5 is a longitudinal sectional view schematically showing a step of positioning a first glass ball.

FIG. 6 is a plan view showing a state where the lead wire pulling device is viewed from above.

FIG. 7 is an enlarged plan view of a lead wire pulling piece.

FIG. 8: Lead wire pulling steps (a), (b),
It is a longitudinal cross-sectional view schematically shown in order of (c).

FIG. 9 is a plan view showing a state in which the glass ball holding member is viewed from above in the second positioning step.

FIG. 10 is a vertical cross-sectional view schematically showing a positioning process of a second glass ball.

FIG. 11 is a plan view schematically showing a conventional lead wire pulling device when viewed from above.

FIG. 12 is an enlarged plan view showing the shape of a piano wire.

FIG. 13 is a plan view showing the shape of a piano wire in another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Incandescent light bulb 2 Glass bulb 2A Glass bulb 4 Lead wire 8 Filament 16 Lead wire pulling device 17 Wall part 17a Opposed surface 18 Lead wire pulling piece 18a Tip part 18b Hook part

Claims (1)

[Claims] 1. A lead wire pulling device used in a manufacturing process of an incandescent lamp in which a filament and a lead wire are arranged inside a glass bulb. A large number of lead wire pulling pieces made of a piano wire or the like are protruded and arranged, and the tip of the lead wire pulling piece is bent to form a hook-like portion. A lead wire pulling device in a manufacturing process of an incandescent lamp, wherein the lead wire is shorter than a diameter of a tube and a bending angle is larger than 90 degrees.