JPH0498759A - Coiling machine - Google Patents

Abstract

PURPOSE:To improve the quality of a coil, and extremely simplify a coiling work by constituting a coiling machine with a system for taking out a mandrel after coiling from a coiling mechanism, and an automatic take-out and take-in mechanism for setting a new mandrel to the coiling mechanism. CONSTITUTION:A filament wire material 8 comprising a tungsten element is drawn from a spool not shown herein, and paid out from a nozzle 3. The leading end of the filament wire material 8 is chucked with a mandrel 7 and this mandrel 7 is rotated. In addition, the nozzle 3 is fed in the axial direction of the mandrel 7 at the predetermined speed. As a result, a coil-shaped filament 9 is formed. After the completion of a coiling process, the filament wire material 8 is cut with a cutter not shown herein. As aforementioned, the mandrel 7 vertically retained is made to rotate and, therefore, the runout thereof is small at the time of rotation. Consequently, the coil form of the filament 9 becomes stable, and the filament 9 of high quality can be manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a coiling machine for producing a coiled filament to be placed in the bulb of a tubular incandescent lamp.

[Prior art and its problems]

Tubular incandescent light bulbs used as heat sources in fixing devices, etc., have a coiled filament held by a ring anchor that is placed along the tube axis of the bulb, and such coiled filament is manufactured using a coiling machine. . Conventional coiling machines pull out a long, highly flexible mandrel wound around a spool from the spool at a predetermined speed and feed it horizontally.The nozzle that feeds out the filament wire rotates around the mandrel to feed the filament wire onto the mandrel. It is wound to form a coiled filament. Then, the coiled mandrel is once again wound onto another spool. In the next step, the coiled mandrel is pulled out from the spool and cut into a predetermined length, and the coiled filament is extracted from the cut mandrel.

In this way, since the filament wire is wound on a long mandrel from the spool, it has the advantage of being able to be processed continuously. Since it is extracted, it is difficult to automate and requires a lot of effort.
Furthermore, since the cut mandrel is discarded, it is a waste of material. Then, in the process of attaching the ring anchor to the filament, it was necessary to pass the highly rigid mandrel through the filament again, which also required a great deal of effort.

Alternatively, a coiling machine is known in which the mandrel is held horizontally with left and right chucks and rotated, and the nozzle is fed along the axial direction of the mandrel and then wound.
In this case, the central part of the mandrel sags a little due to its own weight, and there is a problem that the mandrel is shaken a lot when it rotates, and the coil shape is not constant.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a coiling machine in which the coil shape of the filament is constant, the quality is improved, the work is extremely simple due to automation, and the mandrel material is not wasted. be.

[Structure of the invention and its operation]

The coiling machine of the present invention has a coiling mechanism that winds a filament wire fed from a nozzle around a rotating mandrel that is held vertically by an upper chuck and a lower chuck to form a coiled filament, and a coiling mechanism that completes the coiling from this coiling mechanism. The device has an automatic loading/unloading mechanism that takes out the old mandrel and sets a new mandrel in the coiling mechanism. The rotating member moves forward toward the coiling mechanism, and when the receiving part receives the coiled mandrel, it rotates 180°,
This method is characterized in that a new mandrel held in the transfer section is set in the coiling mechanism and then retreated from the coiling mechanism.

That is, since the mandrel is held vertically and rotated, there is little wobbling during rotation, and the coil shape of the filament is stabilized, improving quality. In addition, since the automatic loading and unloading mechanism takes out the coiled mandrel from the coiling mechanism and sets a new mandrel, labor can be saved.Furthermore, in the process of attaching the ring anchor to the filament, the coiling Since all you have to do is set it on the ring anchor attachment machine as it is, one task becomes extremely simple. Furthermore, there is no need to cut and discard long mandrels, and there is no material waste.

〔Example〕

The present invention will be specifically described below based on embodiments shown in the drawings.

FIG. 1 shows the coiling mechanism. This coiling mechanism consists of an upper chuck 1, a lower chuck 2, and a nozzle 3, and a mandrel 7 is connected to the upper chuck 1 and the lower chuck 2.
The mandrel 7 is chucked and held vertically, and the mandrel 7 rotates around its axis. The filament wire 8 made of tungsten wire is pulled out from a spool (not shown) and fed out from the nozzle 3.The tip of the filament wire 8 is chucked to the mandrel 7, and the mandrel 7 is rotated, and the nozzle 3 is moved at a predetermined speed. When fed in the axial direction of the mandrel 7, a coiled filament 9 is formed. When the coiling is completed, the filament wire 8 is cut with a cutter (not shown). In this way, since the mandrel 7 is held vertically and rotated, there is little wobbling during rotation, and therefore the coil shape of the filament 9 is stabilized, making it possible to manufacture filament 9 of excellent quality.

FIG. 2 shows an automatic loading/unloading mechanism, which consists of a rod-shaped rotating member 4, and a receiving portion 5 and a passing portion 6 attached to both sides of the rotating member 4 at a distance of 180 degrees. The rotating member 4 is arranged in a vertical direction, is rotatable by 180 degrees around an axis, and moves back and forth with respect to the coiling mechanism. The receiving part 5 consists of a holding member 51 and a cone-shaped receiving tray 52. The holding member 51 is attached to a pair of bars 51b so as to be openable and closable in the direction of the arrow, and when the bars 51b are closed, the holding member 51 is held. Hole 51a
is formed. Then, the rotating member 4 moves forward, the mandrel 7 passes between the open bars 51b, and when the lower end of the mandrel 7 is received by the tray 52 and the bar 51b is closed, the mandrel 7 is prevented from falling by the holding hole 51a. Retained.

The transfer section 6 includes an upper holding member 61, a lower holding member 62, and a receiving plate 63. The upper holding member 61 and the lower holding member 62 have the same structure as the holding member 51 of the receiving part 5, and when closed, holding holes 61a and 62a are formed.
The mandrel 7 whose lower end is supported by a receiving plate 63 is held so as not to fall. The receiving plate 63 is capable of retreating in the direction of the arrow, and when the receiving plate 63 retreats, the mandrel 7 whose one lower end is received by the receiving plate 63 falls.

When the coiling is completed, the lower chuck 2 releases the chuck, as shown in FIG.

The upper chuck 1 rises and lifts up the coiled mandrel 7A. At the same time, the rotating member 4 moves forward, and at this time, a new mandrel 7B to be coiled next is held by the transfer portion 6 consisting of an upper holding member 61, a lower holding member 62, and a receiving plate 63. The holding member 51 of the receiving portion 5 is open, and when the receiving tray 52 is positioned below the mandrel 7A, the rotating member 4 stops, the holding member 51 closes, and the upper chuck 1 releases the chuck. Therefore, as shown in FIG. 4, the mandrel 7A is held by the receiving part 5 consisting of a holding member 51 and a receiving plate 52, and when the receiving part 5 holds the mandrel 7A, the rotating member 4 rotates 180''. , the new mandrel 7B is positioned above the lower chuck 2, but the receiving plate 63 is moved back as shown in FIG. , a three-point roller (not shown) holds the mandrel 7B at an accurate position, and as shown in FIG. lowers and lower chuck 2
At the same time, both ends of the mandrel 7B are chucked. When the rotating member 4 retreats, the coiled mandrel 7A is pulled out from the receiving part 5, the rotating member 4 rotates 18 degrees, and a new mandrel is set in the transfer part 6, completing one cycle. Then, the coiled mandrel 7A is set in a ring anchor attaching machine as it is, and a ring anchor is attached to the filament 8.

In this way, the automatic loading/unloading mechanism can automatically take out the coiled mandrel 7A from the coiling mechanism, and also automatically set a new mandrel 7B, making it possible to save labor and reduce work. It is extremely simple and productivity is greatly improved. Also,
Since the mandrel is not cut and discarded, there is no wastage of material.

〔Effect of the invention〕

As explained above, the coiling machine of the present invention includes a coiling mechanism for forming a coiled filament by winding a filament wire around a rotating mandrel that is held vertically, and a coiling mechanism for taking out the coiled mandrel from the coiling mechanism. Since it is comprised of an automatic loading and unloading mechanism that sets a new mandrel in the coiling mechanism, firstly, there is less wobbling when the mandrel rotates, and the filament coil shape becomes constant, improving quality.

In addition, the loading and unloading of the mandrel is automated, making the work extremely simple, and furthermore, no mandrel material is wasted.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the coiling mechanism, FIG. 2 is a perspective view of the automatic loading/unloading mechanism, and FIGS. 3 to 6 are explanatory diagrams of the unloading process.

Claims (1)

[Claims] A coiling mechanism for forming a coiled filament by winding a filament wire fed from a nozzle around a rotating mandrel that is vertically held by an upper chuck and a lower chuck; It has an automatic loading and unloading mechanism that takes out a mandrel and sets a new mandrel in the coiling mechanism, and the automatic loading and unloading mechanism has a receiving part and a passing part separated by 180 degrees on both sides of a vertical rod-shaped rotating member. 1 when the rotating member advances toward the coiling mechanism and the receiver receives the coiled mandrel.
A coiling machine that rotates 80 degrees, sets a new mandrel held in a transfer section in a coiling mechanism, and retreats from the coiling mechanism.