JPS5846529Y2 - Filament coil winding device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a filament coil winding device for obtaining filament coils having different coil pitches.

Filament coils used in tubular light bulbs for copying machines and the like often have a structure with partially different coil pitches due to their light distribution characteristics.

Conventionally, as shown in Fig. 1, filament coil A (coil pitch a) and filament coil B (coil pitch b, a<b), which have different coil pitches, are manufactured separately, and filament coils such as tungsten, molybdenum, etc. Connector C of
By connecting the two using, for example, filament coils with partially different coil pitches.

However, this method not only has poor productivity, but also has problems such as poor impact resistance due to the weight of the connector in a tubular light bulb that incorporates this method into a glass bulb.

Therefore, the present invention provides an apparatus that can easily obtain filament coils that are free from such problems.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, 1 is a hollow drive shaft rotated by a drive motor (not shown) via a pulley and a belt (not shown), 2 is a worm fitted into the hollow drive shaft 1, and 3
is a worm wheel that meshes with the worm 2 and is attached to the shaft 4.

On the shaft 4 is a gear 5 having a gear ratio that determines the coil pitch a.
, 6.7 is installed to drive the shaft 11.

Furthermore, a second gear mechanism consisting of gears 8, 9, and 10 having a gear ratio that determines the coil pitch b is mounted on the shaft 4.
Drive 2.

Reference numerals 13 and 14 designate a first clutch mechanism and a second clutch mechanism that intermittently transmit the rotational force of the shafts 11 and 12 to the shafts 15 and 16, which respectively include a pulley 17, a timing belt 18, a pulley 19, and a pulley 20. , timing belt 21. A shaft 23 is driven via a pulley 22.

A worm 24 is attached to the shaft 23 and meshes with the worm wheel 25 to send the coil core wire to the coil feeding mechanism 27 via the shaft 26.
to drive.

The filament coil wire 29 made of tungsten is
It is wound around a spool 30, is mounted on a disc 32 on which a guide pulley 31 is mounted, and has a peeling device (not shown) for obtaining an appropriate winding tension.

The coil core wire 34 wound around the spool 33 passes through the hollow drive shaft 1 and through the coil core wire guide 25 attached to the hollow drive shaft 1, and at the tip of the coil core wire guide 35, the filament coil element wire 29 is wound and pulled at a predetermined speed by a coil core feeding mechanism, and then wound onto a spool 36 (winding mechanism not shown).

The idler pulley 28 is used to prevent the core wire from becoming tangled when the core wire is wound several times around the coil core wire feeding mechanism 27 in order to increase the tensile force of the coil core wire.

Gears 37 and 38 are provided so that a mechanism similar to the above can be added when there are three or four different coil pitches.

Next, a case will be described in which a filament coil is wound using this winding device.

First, the first gear mechanism consisting of gears 5, 6, and 7 is driven, and the pulley 17, timing belt 18, and pulley 19 are rotated via the first clutch mechanism 13, and the shaft 23 is driven.

As a result, the worm wheel 2 engages with the worm 24.
5 rotates, the coil core wire feeding mechanism 27 is driven, and the filament coil wire 29 is wound around the coil core wire 34 by a predetermined length at a coil pitch a.

Next, the first clutch mechanism 13 is instantly switched to the second clutch mechanism 14, and the driving force of the second gear mechanism consisting of gears 8, 9, and 10 is applied to the coil core wire through the clutch 14 in the same manner as described above. This is transmitted to the feed mechanism 27 to slow down this rotation.

Then, the filament coil wire 29 is wound around the coil core wire 34 by a predetermined length at a coil pitch b.

Thereafter, by removing the coil core wire 34 using a normal method, a filament coil D having partially different coil pitches can be obtained, as shown in FIG.

As explained above, according to the present invention, a filament coil winding device can be obtained that can easily manufacture filament coils having partially different coil pitches.

In addition, since such filament coils can be obtained continuously, there is no need for conventional connectors for connecting separate filament coils with different coil pitches, and therefore tubular light bulbs etc. using this filament coil are no longer required. There is no problem of poor impact resistance.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a filament coil from its width, Fig. 2 is a perspective view of a filament coil winding device which is an embodiment of the present invention, and Fig. 3 is a filament coil obtained by using the same device. It is a partial front view of an example. 5.6,7,8,9.10...Gear, 13...
...First clutch mechanism, 14...Second clutch mechanism, 17,19,20°22...Pulley, 18.21...Timing belt, 27
... Pitch drum, 29 ... Filament coil wire, 34 ... Coil core wire.

Claims (1)

[Scope of utility model registration request] a plurality of gear mechanisms that determine the coil pitch of the filament coil; a clutch mechanism that is connected to the gear mechanism and intermittently transmits the driving force of the gear mechanism; and a clutch mechanism that transmits the driving force of the gear mechanism through the clutch mechanism. driven,
and a coil core wire feeding mechanism whose rotational speed can be varied by switching the clutch mechanism, and a filament coil wire is continuously wound around the coil core wire fed at a predetermined speed by the coil core wire feeding mechanism. A filament coil winding device characterized by being configured as follows.