JPH046253B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a method for shaping lead wires in the manufacture of straight tube fluorescent lamps, and more specifically, to a method for shaping lead wires in the manufacture of straight tube fluorescent lamps, and more specifically, a method for shaping lead wires led out from both ends of a straight tube bulb after stem sealing. Regarding the formatting method before insertion.

Conventional technology Straight tube fluorescent lamps are manufactured using two methods: a vertical method in which the straight tube bulb is supported vertically and various operations such as sealing and exhaust are performed, and the other is a vertical method in which the straight tube bulb is supported horizontally to perform various operations. It is broadly divided into horizontal methods, and each method basically includes the following steps.

A process in which a phosphor suspension is applied to the inner surface of a straight tube bulb, dried, and then heated and fired to form a phosphor film.

A step of sealing the stem with electrodes within both ends of the bulb.

The inside of the valve is cleaned with inert gas through the stem exhaust pipe, the stem electrode is energized to activate the emitters attached to the electrode, and the desired amount of inert gas and mercury is supplied into the valve. After that, the exhaust process seals off the exhaust pipe.

The process of shaping the lead wires extending from the electrodes led out from both ends of the valve after exhaust treatment, inserting them into the cap pins, and attaching the cap to the ends of the valve.

An aging process in which the electrodes in both ends of the bulb are energized through the cap pin, repeatedly turning on and off to stabilize the wrap characteristics.

In addition, a straight tube type fluorescent lamp has a mark indicating the product name of the lamp on the outer periphery of one end of the bulb. Regarding the positional relationship between this mark and the cap pin, in Japan it is decided that the mark should be located within a predetermined angle range with respect to the arrangement direction of the two cap pins protruding from the cap, and due to this restriction, the marking is Conventionally, this has been done after sealing the stem and before or after inserting the cap for the following reasons.

That is, specific examples of each of the above steps will be explained in a horizontal manner with reference to FIGS. 23 to 26. In FIG. 23, 1 is a straight tube bulb made of glass, 2 is a fluorescent film formed on the inner peripheral surface of the bulb 1, and 3 is a stem made of glass. Two strut lines 4, 4 are planted on the stem 3, and the strut lines 4,
The outer protruding parts of 4 are led out to the outside as lead wires 5, 5, and the inner protruding ends support an electrode 6 made of a filament coil, and an emitter material 7 is applied to this electrode 6. An exhaust pipe 8 is connected to the stem 3 in the direction of the center line, and lead wires 5, 5 are led out along the outer periphery of the exhaust pipe 8. 9 is a mount pin for supporting the stem. Further, although the drawings show the manufacturing process for one end of the valve 1, the manufacturing process for the other end is performed in the same manner.

First, the valve 1 is held horizontally, and the stem 3 inserted into the tip of the mount pin 9 is inserted into the end thereof. The mount pin 9 is pipe-shaped,
Inside it is the exhaust pipe 8 of the stem 3 and the lead wires 5, 5.
is inserted. The peripheral edge of the stem 3 supported by the mount pin 9 is brought into contact with the end of the valve 1, and while the valve 1, the stem 3, and the mount pin 9 are rotated, the contact area between the valve 1 and the stem 3 is exposed to the burner flame 10.
The stem is sealed by heating and welding.

Next, send the valve 1 after sealing is completed to the exhaust process,
As shown in FIG. 24, the lead wires 5, 5 led out from the end of the valve 1 are bent 180 degrees in the opposite direction toward the valve 1, and the terminals 11 for energization are connected to the tips of the lead wires 5, 5. and on the other hand, connect the exhaust pipe 8 to the exhaust head 1.
Connect to 2. In this state, desired exhaust processes such as exhausting the inside of the valve, gas cleaning, and activation of the emitter substance are performed.

Next, when the exhaust process is completed, as shown in FIG. Lead wires 5, 5 are inserted through 14 and attached to the outer periphery of the end of the valve 1 via cement 15. After that, heat the cement 15, fix the cap 13 to the valve 1, weld the lead wires 5, 5 to the tips of the cap pins 14, 14, and at the same time remove the excess parts to form the straight pipe shape shown in Fig. 26. Obtain a fluorescent lamp.

In such manufacturing, if a mark 16 such as the product name is marked on the outer periphery of the valve 1 before the stem is sealed, and the product is manufactured in the above-mentioned process, the valve 1 and the stem 3 will rotate in the stem sealing process, and this stem Since the direction of the lead wires 3, 3 in 3 is not constant, the relative positional relationship between the mark 16 after sealing the stem and the pair of lead wires 5, 5 is uncertain, and therefore the mark 16 is not fixed even after the cap is inserted. The relative positional relationship between the cap pins 14 and 14 becomes unstable. Therefore, the mark 16 is marked on a portion of the outer periphery of the valve 1 within a predetermined angular range based on the position of the lead wires 5, 5 or the position of the cap pins 14, 14 before or after inserting the cap after slam sealing. Mark 16 is marked on the This marking is performed by stamping and burning the markings on the outer peripheral surface of the valve 1 using a stamp method or the like.

Problems to be Solved by the Invention By the way, the ink that is stamped and baked on the outer periphery of the valve after sealing the stem and before or after inserting the cap may contain, for example, a high-temperature ink containing a fusing agent, a coloring agent, or a binder with a high baking temperature. There are resin-based inks that have a low baking temperature, but if you mark with the former high-temperature ink, the baking temperature will cause negative effects such as oxidation of the electrode inside the bulb, damage to the fluorescent film, or damage to the cap after inserting the cap. Not only
There is a disadvantage that the heating means for baking is large-scale. Therefore, marking is performed using the latter resin-based ink. However, resin-based ink has a weak adhesion strength to glass and easily peels off from the bulb 1 after baking, and as a result, the mark 16 on the commercialized straight tube fluorescent lamp disappears or becomes thinner and difficult to read when rubbed. Something happened.

This problem can be solved by stamping a mark on the outer circumference of the bulb with high-temperature ink before firing the fluorescent film before sealing the stem.
The problem can be solved by baking at 600℃. but,
If marking is performed before the stem is sealed, it becomes difficult to keep the relative positional relationship between the mark and the cap pin constant as described above, and for this reason, marking before the stem is sealed has not been performed.

Therefore, an object of the present invention is to attach the lead wire extending from the valve to the mark after sealing the stem and before inserting the cap so that the relative positional relationship between the mark and the cap pin is constant even if the mark is marked before the stem is sealed. The purpose is to provide a method for shaping images in a certain direction.

Means for Solving the Problems The present invention achieves the above object through the following steps A to E.

A: Before the stem sealing process, a mark is marked on a part of the outer periphery, and after the stem is sealed, a pair of lead wires led out from both ends are bent toward the center of the valve, and the exhaust-treated straight pipe valve is marked with that mark. The process of detecting the position, rotating the valve at a fixed position, and stopping the valve based on a mark position detection signal when the mark is located in a direction within a predetermined angular range.

B. Divide the lead wire distribution area on the end face of the valve at the fixed position in step A into a first area consisting of two point-symmetric areas that spread radially from the valve center line at a certain angle in a certain direction, and a remaining second area. Then, the lead wire pair on the end face of the valve that stopped in step A is connected to the first
A step of detecting whether or not it is within the area.

C When the lead wire pair is detected in the first region in step B, the lead wire pair in the first region is deformed and moved in the direction of the outer circumference of the valve based on the detection signal, and the lead wire pair in the second region is
The process of locating within the area.

D: A process of extending the tip portions of the lead wire pair in the second region, which are curved toward the valve center side, toward the valve extension line side.

E. A step of aligning the lead wire pair stretched in step D on a plane within a second area that forms a predetermined angle with respect to the mark on the valve.

Effect When the lead wire is shaped as shown in steps A to E above,
The final relative positional relationship between the lead wire pair led out from the valve end and the mark marked in advance on the outer circumference of the valve is constant, and even if the cap is inserted after the above step E, the relative positional relationship between the cap pin and the mark remains constant. becomes constant. This allows the valve to be marked before the stem is sealed, and high-temperature ink can be used for the mark.

Embodiment Each of the above steps A to E will be described below with reference to FIGS. 1 to 22 using a specific example of an apparatus for implementing the process.
The drawings show an example of a horizontal manufacturing process apparatus in which the straight pipe valve 17 is supported horizontally and the lead wires are shaped. In addition, the valve 17 whose lead wire is shaped by this lead wire shaping device has a mark 18 such as the product name on a part of its outer periphery before the stem is sealed, and the valve 17 has undergone stem sealing and exhaust treatment before the cap is inserted. It is.

Furthermore, since the marking on the valve 17 is performed before the stem is sealed, the ink for the mark 18 is, for example, a high-temperature ink containing a fusing agent, a coloring agent, and a binder and having a high baking temperature. Specifically, a mark 18 is stamped with high-temperature ink on a part of the outer periphery of the bulb 17 before and after applying the phosphor suspension to the inner periphery of the bulb, and the phosphor suspension is applied to the inner periphery of the bulb. The ink of the mark 18 is burned onto the bulb 17 by the heat generated when the bulb is fired in a heating furnace. Mark 1 when marking like this
8 is an ink for high-temperature baking, so it has excellent adhesion to the bulb 17, and since the mark 18 can be baked using the heat during baking the fluorescent film, energy can be saved. Such advantages in mark formation are brought about by realizing lead wire shaping in the following steps A to E according to the present invention.

First, the above step A will be explained based on FIGS. 1 and 2. In the same figure, 19 and 19 are a pair of support rollers that hold the valve 17 horizontally and rotate in one direction after exhaust treatment, and 20 is a pair of support rollers 19 and 1
A presser roller 21, which presses down the valve 1 on 9 and rotates as a result, is installed directly above the mark 18 of the valve 1, which is held by each roller 19, 19, 20 and rotates on its axis, so that the mark 18 is directly above it. A sensor that detects this is, for example, an optical sensor that includes a light emitting element and a light receiving element. 22 is a support block that supports the optical sensor 21 and the presser roller 20 and is movable up and down.

When the valve 17 is supplied onto the support rollers 19, 19, the support block 22 is lowered and the presser roller 2
0 presses the valve 17, and in this state, the valve 17 pivots in a fixed position. During this time, the optical sensor 21 projects light toward the bulb 17 and receives the reflected light. Then, when the mark 18 comes to the position directly above due to the axis rotation of the bulb 17, the light from the optical sensor 21 hits a part of the mark 18, and the reflectance changes, and the amount of light input to the optical sensor 21 changes, and this change Therefore, it is detected that the mark 18 has come directly above. Then the optical sensor 21
The support roller 19,
The drive system 19 is stopped and the rotation of the valve 17 is stopped. For example, the valve 17 stops when the mark 18 is located directly above it. Mark 18 directly above this
The relative positional relationship of the pair of lead wires 5, 5, which are led out from the valve end and bent inward, is indefinite.

Here, the lead wire distribution area on the end face of the stationary valve 17 in process A is set at a constant angle (approximately 30°) in the vertical direction from the valve center line, as shown in FIG.
If the valve 17 is divided into a first region m and a second region n, which are two points-symmetrical regions extending radially, the lead wires 5, 5 of the stationary valve 17 are connected to either the first region m or the second region n. Located in

Next, the above step B will be explained based on FIGS. 4 to 6. When the bulb 17 comes to rest in step A, a pair of electrode plates 23, 23 are placed toward the end surface of the bulb 17.
approach. The upper and lower electrode plates 23, 23 are fixed to the upper and lower front surfaces of the insulating plate 24, and each has a shape that makes surface contact with the first region m of the circular end face of the bulb 17. Although not shown, various electrode plates 23 ,23
is connected to an energization test circuit that includes an ammeter, etc. Therefore, both electrode plates 23 and 2 are connected via the insulating plate 24.
3 approaches the end face of the valve, if the lead wires 5, 5 are in the second region n as shown in FIG. If there is no current and the lead wires 5, 5 are detected to be in the second region n, while the lead wires 5, 5 are in the first region m as shown in FIG. The electrode plates 23, 23 come into contact with the curved portions near the end faces of the valves 5, 5, and current is passed between the electrode plates.
As a result, it is detected that the lead wires 5, 5 are within the first region m.

If the lead wires 5, 5 are within the second region n as shown in FIG. 5, the work in step C is not performed in the next step C, and the process moves to step D. Further, if the lead wires 5, 5 are in the first region m as shown in FIG.
5 is deformed and moved to the second region n in the next step C. That is, step C will be explained based on FIG. 7 to FIG.
A support plate 27 fixed to both ends is a rod that supports the support plate 26 so that it can reciprocate in the direction of the valve axis and can reciprocate at a constant angle about the valve center line.
The pair of first line dividing plates 25, 25 are on the same plane equidistant from the valve center line, and each is a flat plate having a shape that matches the approximately V-shaped cross-sectional end of the valve 17, as shown in FIG. Then do the following:

First, the first dividing plates 25, 25 are located in a second region n that is parallel to the end surface of the valve 17 in the valve axis direction and makes an angle of about 45° with a horizontal plane passing through the valve center line. It moves forward and fits into the end of the valve 17. In this case, since the lead wires 5, 5 are located in the first region m, the first line dividing plates 25, 25 do not come into contact with the lead wires 5, 5. Next, the first line dividing plate 2
5 and 25 rotate to the left at an angle of about 90°, passing through the first region m, about the center line of the valve, as shown in FIG. Then, the lead wires 5, 5 in the first region m
is pushed by the first line dividing plates 25, 25 and the second area n
deforms and moves to an angular position of approximately 45°. Next, the first
The line dividing plates 25, 25 are rotated approximately 180 degrees in the opposite right direction as shown in FIG. This 180° rotation is
This is to make the lead wires 5, 5 whose positions have been corrected by 90° rotation, when they are not parallel to the plane passing through the bubble center line due to the deformation movement caused by the position correction, to make them parallel. By rotating 90 degrees, the lead wires 5, 5 are almost within the second area n.
Make sure it is at a 45° angle. After that, the first line separating plates 25, 25 are moved back and forth in the direction of the bubble axis to a fixed position and separated from the lead wires 5, 5.

Next, the above step D will be explained based on FIGS. 12 to 16. 28 in Figures 12 and 13
29 is a circular wire holding plate, 29 is a rod that reciprocates the wire holding plate 28 in the bubble axis direction, 30 is a wire stretching ring, and 31 is a rod that makes the wire stretching ring 30 reciprocate in the bubble axial direction. The wire holding plate 28 is a circular plate having approximately the same diameter as the end face of the bubble, and a large number of teeth 32 for preventing the lead wire from slipping are formed radially around the front surface, for example. The wire stretching ring 30 is a ring having an inner diameter slightly larger than the outer diameter of the bubble 17, and has a large number of teeth 33 formed in the axial direction on the inner circumferential surface to prevent the lead wire from slipping. Note that the teeth of the wire holding plate 28 and the wire stretching ring 30 may be replaced by roughening or the like.
The wire holding plate 28 and the wire stretching ring 30 are coaxially installed perpendicular to the bubble center line, and both perform the following operations using the same driving source or independent driving sources.

For example, as shown in FIG. 12, the wire holding plate 28 and the wire stretching ring 30 are located at a certain distance from the end face of the bubble, and both move forward from this position.
Then, as shown in FIG. 14, when the wire holding plate 28 presses the curved portion of the lead wires 5, 5 against the end face of the valve, the forward movement of the wire holding plate 28 is stopped, and only the wire stretching ring 30 moves further and the valve 17 The ends of the lead wires 5, 5 are inserted while holding the bent tips inside, and when they are inserted to a fixed position away from the tips of the lead wires 5, 5, they stop, and the lead wires 5, 5 are held by the spring. Ring with a straight line at the tip of the toe 30
protrude more outward. Next, only the line stretching ring 30 is moved back. Then, during this retreat, the tips of the lead wires 5 ride on the wire stretching ring 30 and are gradually stretched together with the wire stretching ring 30 in the direction of the valve extension line, and the wire stretching rig 30 returns to its original position as shown in FIG. When retreating to the position, lead wires 5, 5
The part pressed by the wire holding plate 28 and beyond is shaped in the direction of the valve extension line. This lead wire stretching operation is performed by pressing a part of the lead wires 5, 5 against the valve end face with the wire holding plate 28 and temporarily fixing them, and then fitting the lead wires 5, 5 into the teeth 33 of the wire stretching ring 30. Since this is done by pulling out the lead wires 5, 5, the process can be carried out reliably without twisting or moving the lead wires 5, 5.

Incidentally, since the lead wire extension in step D is performed on the lead wires 5, 5 of the second region n, at the end of the mark detection step A, the lead wires are extended from the beginning to the second region n as shown in FIG. In the case where the lead wires 5, 5 are located, the lead wires are stretched in the same manner as described above in step D without going through step C.

As described above, even if the root position of the lead wires 5, 5 of the valve 17 that has completed the process D is uncertain, the tip end protruding from the valve end will always extend the valve from any position within the second region n. Stretched in the linear direction. At this stage, the tips of the pair of lead wires 5, 5 face each other at an interval of approximately 180°, but the marks 18
The arrangement angle (relative positional relationship) is not constant. Therefore, the relative positional relationship between the mark 18 and the tips of the lead wires 5, 5 is made constant in the next step E.

This process E will be explained based on FIGS. 17 to 21. In the same figure, 34 and 34 are a pair of second line dividing plates, and 35 is a support plate with the second line dividing plates 34 and 34 fixed at both ends. , 36 are rods that support the support plate 35 so that it can reciprocate in the bubble axis direction and reciprocate at a constant angle about the valve centerline. The pair of second line dividing plates 34, 34 are flat plates shaped to suitably fit into the ends of the bulb 17 at an angle of 180°.

After the lead wires are stretched in step D, the second wire dividing plates 34, 34 move forward to extend the wires to two locations above and below the first region m at the end of the valve 17, as shown in FIGS. 17 and 18. Approach it, then turn 90 degrees to the left, then 180 degrees to the right. First, if the second line dividing plates 34, 34 are rotated 90 degrees to the left as shown in FIG. 19, and the tips of the lead wires 5, 5 are within the rotation range, the tips will be placed on a substantially horizontal surface. Arrange. Next, the second line dividing plates 34, 34 are rotated 180° to the right as shown in FIG. As shown in FIG. 21, they are aligned on a substantially horizontal plane, and the relative positional relationship with the mark 18 is constant here.

The above is a specific example of the lead wire shaping method according to the present invention, and the cap is then inserted into the valve 17 that has undergone the above step E. This cap insertion is carried out in the same manner as in the conventional method, for example, as shown in FIG. is moved in the direction of the valve extension line and adjusted to the final position where the cap pin can be inserted while removing the lead wires 5, 5, and then inserting the cap pins 14, 14 of the cap 13 into the lead wires 5, 5. Base 1
3 to the end of the valve. This final shaping of the lead wires for inserting the cap can be easily and reliably performed since the directions of the lead wires 5, 5 are regulated in step E.

In the above description of the present invention, the arrangement angle of the lead wire pair with respect to the mark on the valve was restricted to approximately 90 degrees, but the arrangement angle of the lead wire pair with respect to the mark is not limited to 90 degrees. The marks may be positioned in the arrangement direction of the valve, and the relative positional relationship between the mark and the lead wire pair can be changed, for example, by changing the mark position when the valve is stopped from directly above to directly to the side in step A of detecting the mark position. Changes such as

Furthermore, although each of the above descriptions has been explained with respect to one end of the valve, lead wire shaping at the other end is also performed in the same manner.

Furthermore, the present invention is not limited to the horizontal method, but can be similarly applied to lead wire shaping for vertical method fluorescent lamp manufacturing.

Effects of the Invention According to the present invention, even if the product name, etc., are marked on the valve using high-temperature baking ink before sealing the stem, the relative positional relationship between the mark and the cap pin after the final cap insertion process can be maintained. It can be kept constant. In addition, by marking with high-temperature ink before sealing the stem, the mark can be burned onto the bulb at a sufficiently high temperature without worrying about damage to the stem electrode, increasing the strength of the mark's adhesion to the bulb. , the commercial value of straight tube fluorescent lamps is improved.

[Brief explanation of drawings]

1 to 22 are for explaining a specific example of an apparatus for implementing the method of the present invention.
The figures are a side view and a front view of the device in the process of detecting the mark position of the valve, Figure 3 is a diagram of the lead wire distribution area on the valve end face in Figure 2, and Figure 4 is a side view of the device in the process of detecting the lead wire position. , Figures 5 and 6 are valve end views taken from the T ₁ - T ₁ line in Figure 4,
Fig. 7 is a side view of the device in the lead wire separation process, Fig. 8 is a cross-sectional view taken along the line T ₂ - T ₂ in Fig. 7,
Figure 9 is an enlarged sectional view taken along line T ₃ - T ₃ in Figure 8;
10 and 11 are cross-sectional views taken along the T ₂ - T ₂ line during each operation of the device shown in FIG. 7, FIG. 12 is a side view of the device in the lead wire stretching process, and FIG. Figure 12 is a front view taken from line T ₄ - T ₄ , Figures 14 and 15 are side views of the device in Figure 12 during each operation, and Figure 16 is a view taken from line T ₅ - T ₅ in Figure 15. 17 is a side view of the device in the step of aligning the lead wires, FIG. 18 is a sectional view taken along line T ₆ - _{T 6} in FIG. 17, and FIGS. 19 and 20 are FIG. 17. Cross-sectional view along the T ₆ - T ₆ line during each operation of the device, 2nd
FIG. 1 is a perspective view of the valve after lead shaping has been completed, and FIG. 22 is a perspective view of the valve when the base is inserted. FIGS. 23 to 26 are side views of the bulb for each process to explain the manufacturing process of a typical straight tube fluorescent lamp. 5... Lead wire, 17... Valve, 18... Mark, m... First region, n... Second region.

Claims (1)

[Claims] 1 Before the stem sealing process, a mark such as the product name is affixed to a part of the outer periphery, and after the stem is sealed, two of each pair of lead wires are led out from both ends and bent 180° in opposite directions toward the center of the valve. A method for shaping the lead wire of a straight pipe valve before inserting an exhaust-treated cap, in which the mark position of the valve is detected and the mark is rotated at a fixed position so that the mark is within a predetermined angle range. A step of stopping the valve based on a mark position detection signal when the valve is positioned, and a step of changing the lead wire distribution area on the end face of the valve into two point-symmetric areas that extend radially at a constant angle in a constant direction from the valve center line. detecting whether or not the lead wire pair on the end face of the stopped valve is in the first region by dividing the valve into one region and the remaining second region; and detecting the lead wire pair in the first region. If the lead wire pair in the second region is bent toward the center of the valve, the lead wire pair in the second region is bent toward the center of the valve. a step of extending the tip end toward the valve extension line; and a step of aligning the elongated lead wire pair on a plane within a second region at a predetermined angle with respect to the mark of the valve. A method for shaping lead wires for tubular fluorescent lamps.