JPS6261262A - Manufacture of anchor assembly - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a method of manufacturing an anchor assembly for a tubular incandescent lamp.

[Prior art and its problems]

In a tubular incandescent light bulb that has one elongated light-emitting filament coil along the tube axis, the illuminance on a predetermined irradiated surface in the tube axis direction is high at the center and low at both ends.

Therefore, when this tubular incandescent light bulb is used as an exposure light source for a copying machine, for example, there is a difference in illuminance between the ends and the center of the photosensitive drum, resulting in uneven copying. Therefore, in order to form a predetermined light distribution pattern on the document table, instead of using a single long light-emitting filament coil, light-emitting filaments and non-light-emitting parts, which are short-circuit parts, are arranged alternately at appropriate intervals 17;
17 so that uniform light distribution characteristics can be obtained on the photosensitive drum. Therefore, from the viewpoint of light distribution characteristics, the length of the non-light emitting portion is 1 mm, and if the error in this length is large, the light distribution characteristics will become non-uniform.

Further, in light bulbs for exposure of copying machines, etc., the light-emitting filament is strongly required to have vibration resistance and impact resistance, and it is necessary to always hold the light-emitting filament along the axis of the envelope. For this reason, an anchor is attached to the non-light-emitting part, and the ring-shaped large-diameter part of the anchor is brought into contact with the inner wall of the envelope to provide vibration resistance and impact resistance, and the light-emitting filament is held at the center of the envelope. There is.

By the way, when assembling a non-luminous body and an anchor, as shown in FIG. If the light-emitting filament i is inserted and fixed, the anchor 12 and the non-light-emitting portion 11 are integrated, which has the advantage of reducing the number of parts. However, with this structure, it is difficult to make the length in the axial direction constant when bending the anchor 21, and as a result, the non-light emitting part 1
Large variations occur in the total length of 1. Therefore, there is a problem that the light distribution characteristics become non-uniform, resulting in uneven copying.

[Purpose of the invention]

Therefore, the present invention has a simple structure that allows the assembly of the non-light-emitting part and the anchor, which can be easily set accurately to a fixed size, to have a total length of 19 mm.
It is also an object of the present invention to provide a manufacturing method with high productivity.

[Structure of the invention]

The structure of the present invention includes a non-light-emitting part that is arranged between the light-emitting filaments of a tubular incandescent lamp and is made of a highly rigid straight wire, a fixed part that is wound around the wire, and a ring-shaped part that is in contact with the inner wall of the tubular envelope. A method of manufacturing an assembly with an anchor consisting of a large-diameter portion, in which an end of an anchor wire in a direction perpendicular to the wire is fixed at a predetermined location of a wire taken out from a spool and passed through a straightener.1- 1 The step of rotating this a predetermined number of times and winding the wire around the wire to form a first fixed part, and the wire being inserted into the inside, having #jj at the end, and this end being spirally inclined. A cylindrical body having an edge in the axial direction is moved forward in the axial direction, a strand extending from the first fixed part in the orthogonal direction is locked in the groove, and the cylindrical body is rotated together with the wire to phase the strand in the axial direction. A process of winding the wire around the cylinder while shifting the diameter to form a ring-shaped large diameter part, dropping the wire onto the wire from the edge of the cylinder, rotating the wire a predetermined number of times, winding the wire around the wire, and second fixing. and cutting a wire to which a plurality of axially spaced anchors are attached, leaving insertion portions for light emitting filaments at both ends.

〔Example〕

Embodiments of the present invention will be specifically described below based on the drawings.

FIG. 2 schematically shows a plan view of the manufacturing apparatus used in this example, in which a wire 10 made of molybdenum or tungsten and having an outer diameter of about 0.4 to 0.6 gφ is attached to a spool 1.
It is taken out from this, straightened by straightening machine 2, and sent to winding machine 3! do. The tip of the wire 10 that has passed through the winding machine 3 is held by a feeder 4, and the wire 10 is intermittently fed by a fixed distance Qi in the direction of the arrow. The anchor wire 20 wound around the spool 5 in a direction perpendicular to the wire 10 is sent to the winding machine 3. The angle between the wire 10 and the total M2O is not a right angle, but is slightly inclined, and when the wire 20 is wound around the wire 10, the wire 2
0 is sent to the lO state, and the strands 20 can be coiled with 16 turns without overlapping each other.

FIG. 3 shows a top view of the winding machine 3, showing the wire 10 inserted into the center hole of the rotating spindle 7 and rotating together, but the cylindrical body 9 is inserted into the small diameter portion at the tip of the rotating spindle 7. AiJ is equipped with movable movement.

A chuck 8 is mounted on a pin 81' (rotatably pivoted around r), and has the ability to clamp the strand 20 against the wire 10 at its tip.

Thus, in order to manufacture the assembly of the non-light-emitting part 11 and the anchor 21 shown in FIG. 6, first, as shown in FIG. 4, the tip of the strand 20 is applied to the wire 10. A portion of the tip edge of the rotating spindle 7 is notched, and a chuck 8 holds the wire 20 in the notched portion. Next, the rotating spindle 7 is rotated. lM2O is wire 1
Since it is slightly tilted from a right angle to 0, the strand 20
A first unique portion 23 is formed by winding the wire 10 in a coil shape off the tip edge of the spindle 7.

When the first solid layer 23 is not formed, the cylindrical body 9 moves forward, but the axial groove 91 and the chuck groove 9
2 is provided, and the wire 20 and chuck 8 are there! l into grooves 91 and 92, respectively. The front end edge of the cylindrical body 9 is slightly spirally wound with #4 to form an axial edge portion 93. The outer diameter of the cylindrical body 9 is equivalent to the ring-shaped large diameter portion 22 of the anchor 21, but when this cylindrical body 9 is rotated together with the wire 1O, the wire 20 is wound around the cylindrical body 9 and formed into a ring-shaped part. A large portion 22 is formed. At this time, if the phase of the wire 200 is shifted and attached along the slope of the front edge of the cylindrical body 9, the wire 20 falls from the edge 93 to the wire 10.

As shown in FIG. 8, the ring-shaped diameter portion 22 is formed by winding the wire 20 twice or more times and then wrapping the wire 10 around it.
You can also make it fall on top. When the ring-shaped large-diameter portion 22 is formed, the cylindrical body 9 retreats, and when the wire 10 is rotated, the strands 2o are wound in a coil shape to form the second fixed portion 24. Then, the wire 20 is cut to complete the assembly of the anchor 21.

Next, the wire 10 is advanced by a predetermined distance by the feeder 4, and the steps d[b] are repeated again, and the anchors 21 are sequentially assembled in steps 1 to 1, leaving the light emitting filament insertion portions 12 and 12 on the outside of the anchors 21. By cutting the wire 10, the assembly of the non-light emitting part 11 and the anchor 21 is completed.

FIG. 7 shows an example of a tubular incandescent light bulb using this assembly of the non-light emitting part 11 and the anchor 21.
Insert the light emitting filament 31 into and fix it by welding etc.
The non-light-emitting portions 11 and the light-emitting filaments 31 are alternately arranged at predetermined intervals. Next, one end of the outermost light-emitting filament 31 is connected to the molybdenum fitting 32, and the outer conductor 33 is connected to the molybdenum foil 32, and the molybdenum foil 32 is crimped and sealed by placing it in a tube-shaped sealing body 30 made of quartz glass. and outer conductor 3
3 to terminal 34, an incandescent light bulb is completed.

When this incandescent lamp is energized and turned on, the non-light-emitting portion 11 and the light-emitting filament 31 are arranged at predetermined intervals (j), so that the center and both ends of the elongated irradiation area have equal illuminance. Since the non-light-emitting portion 11 manufactured according to this embodiment has its total length determined by cutting the 1a linear wire 10, variations in the total length can be made extremely small.

Therefore, the ratio of the light-emitting part to the non-light-emitting part becomes accurate, and an incandescent lamp with almost no variation in light distribution characteristics can be obtained. Since a plurality of anchors 21 are attached to the non-light emitting part 11 at a distance in the axial direction, it has excellent vibration resistance and impact resistance, and the light emitting filament 31 is always attached to the envelope 30.
It can be held along the axis of the

〔Effect of the invention〕

As explained above, the present invention fixes the anchor to a straight wire with two fixing parts, automatically forms a ring-shaped large diameter part, and completes the assembly by cutting the wire. Therefore, it is possible to easily and efficiently manufacture an assembly of a non-light-emitting part and an anchor whose total length can be easily determined to a predetermined size.

[Brief explanation of drawings]

Figure 1 is an oblique view of the conventional example, Figure 2 is a plan view of the manufacturing equipment,
Figure 3 is a sectional view of the main parts of the winding machine, Figures 4 and 5 are process explanatory diagrams, Figure 6 is a perspective view of an assembly according to a certain embodiment of this study, and Figure 7 is a sectional view of an incandescent light bulb. , FIG. 8 is a perspective view of another embodiment.

Claims (1)

[Scope of Claims] A non-light-emitting part that is arranged between the light-emitting filaments of a tubular incandescent lamp and is made of a highly rigid straight wire, a fixed part that is wrapped around the wire, and a ring-shaped part that abuts the inner wall of the tubular envelope. A method of manufacturing an assembly with an anchor consisting of a large-diameter portion, the method comprising: fixing an end of an anchor wire in a direction perpendicular to the wire at a predetermined location of a wire taken out from a spool and passed through a straightening machine; A process of rotating this a predetermined number of times and winding the strands around the wire to form a first fixed part, and a process in which the wire is inserted into the inside and has a groove on the end face, and this end face is spirally inclined to form an axial edge. A cylindrical body having a section is moved forward in the axial direction, a wire extending perpendicularly from the first fixed part is locked in the groove, the cylindrical body is rotated together with the wire, and the cylindrical body is moved forward while shifting the phase of the wire in the axial direction. A process of winding the strand around the body to form a ring-shaped large diameter part, and dropping the strand onto the wire from the edge of the cylindrical body, rotating the wire a predetermined number of times, and winding the strand around the wire to form a second fixed part. process and
A method for manufacturing an anchor assembly comprising the step of cutting a wire to which a plurality of axially spaced anchors are attached, leaving insertion portions for luminescent filaments at both ends.