JPS5846570A - Inspector for surface of fluorescent lamp - Google Patents

Abstract

PURPOSE:To detect whether any color nonuniformity, which might be caused due to separation of a phosphor film or variation in the thickness of the phosphor film, exists or not by observing the surface of a bulb coated with the said phosphor film. CONSTITUTION:Glass bulbs 32 move on a guide rail 35. Light emitted from a tubular halogen lamp 45 which is shifted to a judgement position 102 after being connected into an installed groove 30 located at a supply position 101, irradiates the surface to be inspected of a glass bulb 32. Next, light transmitted by the above surface becomes incident upon a video equipment 46, and a video signal is used as the input to an unusuality judging circuit. Here, the glass bulb 32 is rotated within the groove 30, so that inspection of the entire circumference surface of the bulb 32 is performed. After the inspection of the surface of the bulb 32 is finished, the bulb 32 is moved to a detachment position 103, shifted to a sending shoot 53, and is dropped onto a shoot 55 for removing defective goods when it is judged to have any unusuality. Consequently, the surface of the bulb 32 can be inspected without any need of a hand, and the reliability of the detection of the unusuality is enhanced as a matter of course. Besides, manufacturing processes of the lamp 45 can be arranged on a line, and are suitable for mass-production because the manufacturing efficiency of the lamp 45 becomes high.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention monitors the surface of a bulb to which a phosphor coating is applied to detect whether or not there are color spots due to peeling of the phosphor coating or changes in film thickness. The present invention relates to a surface inspection device for a fluorescent lamp.

Conventionally, this type of inspection has been carried out by direct visual inspection by an operator at the end of a single lamp manufacturing machine arranged in a line, but in this way unnecessary bulbs are also sent to the end of the process, resulting in unnecessary waste. Materials are supplied, which is extremely uneconomical, and because the inspection is done by humans, it is unreliable, and there are inconsistencies such as reduced work efficiency and the inability to take full advantage of the benefits of automated manufacturing. be.

The present invention was developed based on these circumstances, and its purpose is to be able to automatically detect defective products with peeling or spots on the phosphor coating, and to completely eliminate manual intervention. It is an object of the present invention to provide an apparatus for inspecting the surface of a fluorescent lamp, which is suitable for bankruptcies by enabling line production without any trouble, and which also enables accurate inspection.

The present invention will be explained below based on an embodiment shown in the drawings.

In the figure, l is a base, and on this base l is a pair of supporting walls 2.
, 2 are spaced apart and facing each other in the left and right direction. Pivot shafts 3.1 are rotatably mounted through the support walls 2, 2, respectively, and these shafts 3.1 are located on the same straight line.

In the one layer part led out to the opposing surface side of the supporting walls 2, 2,
A holder 4.4 is fixed in each case.

Holder 4.4 has a square plate shape without t, these holders 4.4
Four shirts 5a to 5d are installed between the four corners of the shirt. In addition, a drive shaft 6 is rotatably attached to one of the supporting walls I so as to be located above the one shaft 3, and a drive shaft 6 fixed to the pivot S is attached to the -nAs of the drive shaft 6. The large gear 8 that meshes with the small gear r is completely fixed. A ratchet mechanism 9 is about to be attached to the other end of the drive shaft 6. 10 is its driving ratchet wheel, and the driving shaft -
along with being fixed to.

This locking of the outer peripheral end surface*! 1llll... is engaged with the fitting 12. This plate 12 is connected to one end of a rotating arm 13, and the middle part of the rotating arm 13 is rotatably supported on the drive shaft 6, and the other end is a piston of an air cylinder 14. It is connected to the rod 15. Therefore, when the piston rod 15 of the air cylinder 14 is thrust, the pawl J2 performs a swinging motion, and this pawl 12 sequentially locks on the locking teeth flAtt... and pushes them forward by l pitch. , thereby causing the ratchet wheel l# to rotate intermittently in the direction of arrow A. When the ratchet wheel 10, that is, the Wh axis σ, is rotated by l pips, the holders 4, 4 are rotated 90 degrees in the opposite direction to the rotational direction of the ratchet wheel 10 via the large gear +S* and the small gear r. It is designed to move 1m. In addition, II
I is a detent to prevent reverse rotation of ratchet wheel l#.

A locking ratchet wheel 11 and a brake wheel 1B are fixed to the other pivot shaft 1 *S, and the locking ratchet wheel 17 has locking teeth opening in the rotational direction of the holders 4 on the outer peripheral end surface thereof. A portion 19... is formed.

On the other hand, a pair of support brackets 20 and 20 are protruded on the base l, located in front of the support walls 2 and 2, and a support shaft 2 is connected between these support brackets 20 and 20. It is mounted horizontally so that it can rotate. The support shaft 21 is located at the front upper part of the shafts 51 to 5d,
~5d and is located parallel to g on the other force support 117 side! A holder 22 is relatively rotatably attached to aS. The holder 22 has a locking pawl 2J.
The base end portion of the locking pawl 2J is welded, and the tip of the locking pawl 2J faces the lock @@19 of the locking ratchet wheel 12. Further, the base end of a rotating arm 24 is welded to this holder 21, and this rotating arm 24 extends in the opposite direction to the locking pawl j&.
2. Its tip end is connected to the hinge rod 2C of the air cylinder 25. The piston rod 2- is the holder 4
．． 4 is rotated by l pitch, the piston rod 26v
is actuated to protrude and therefore
When the air cylinder 1j is actuated, the lock pawl 21 is rotated in the direction of arrow B via the first rotation arm 241, and the tip is locked with the lock tooth sl# of the lock ratchet wheel 12. It looks like this. In addition, the code 21 is the brake car l.
This is a brake belt that comes into sliding contact with #.

A pair of ring-shaped support plates za and is are attached to the shafts 5a to 5d so as to be spaced apart from each other in the left-right direction. These supports 11zaaza have one end open on the outer circumference m m t: and the other end opened in the central through hole 2# by four mountings @J-#--, which are equally spaced in the center direction. The respective divided pieces JJajzib, Ilc, and IJ- are connected to the shaft sa.
~I- is supported by bond. And the above installation #IJ
#-- are shifted by 9f in the circumferential direction □--Therefore, the holder 4.4 is stopped at a position where the mounting @SO... is oriented vertically and horizontally r. These mounting grooves JO... are used to hold the straight glass bulbs 32 for fluorescent lamps, and the middle portions of the opposing inner surfaces of the mounting grooves 30... are used to hold the glass bulbs 32. A bulging portion 33 is formed that bulges inward along the circumferential direction, and a roller 34 that rolls into contact with the outer peripheral surface of the glass pulp S2 is embedded in each bulge @3B. In the supply position 101, where one of the mounting grooves 30 is oriented to the right in the drawing, the guide rail 35, 35 led out from the phosphor film coating device (not shown) is located, and therefore the supply position is position 1
01, a glass pulp 32 whose inner surface is coated with a substantially white phosphor coating J6 is sequentially fed out onto the guide rails ss and zs. Both ends of the sent glass pulp 12 are fitted into the mounting grooves 10 located at the supply position 101, and the glass pulp 12 is inserted into the support plate i.
After the intermittent rotation of s and za, the determination position 1111 where the mounting groove 10 is oriented upward and the take-out position 1oxE=@next shift Wk8 where the mounting groove 30 is oriented leftward in the figure are reached.

Further, a bracket sr is fixed to the support shaft 21, and rollers 40 driven by a motor j# and a gear 1# attached to the single rotation shaft of the motor 18 are mounted on the IF. has been done. This support shaft 1
A holder 41 is relatively rotatably attached to one end of the holder 4, and the base end of the 0-rotation stay 42 to which (2) a single part of the movable stay 4z is welded is attached to the holder 4. It is connected to a piston rod 44 of an air cylinder 42, and when the piston rod 44 is protruded, the support shaft 2 is reciprocated in the direction around the axis via the I-movement stay 42, and the piston rod 44 is protruded. In this state, the roller 40 rolls into contact with the glass pulp 1z located at the determination position 102, causing the glass pulp Sa1 to rotate 36 degrees around the axis within the mounting groove I#.

On the other hand, a tube-shaped herogen lamp 45 for irradiating light onto the detection surface of the glass pulp 32 is inserted through the through holes 29e29 of the support plates III and 2B so that light is irradiated thereon. Further, above the judgment position 102, an imaging mechanism 46 is disposed at the center along the tube axis direction of the glass pulp 32 at this judgment position lO2. IP''
42, and a lens 4 for condensing the 'kw light transmitted through the detection surface of the glass bulb 32 onto this imaging sensor f4F.
It consists of 8. This photo sensor 42 is a solid-state photo sensor that converts %yt into an electrical zero number and sends it out, and is arranged in a line in the required number corresponding to the tube axis length of the glass pulp 12. As a result, the detection field of view becomes band-shaped,
The detection surface is imaged in a band shape along the tube axis direction, and
Of the transmitted light transmitted through the detection surface of the glass pulp 32, only light of a specific wavelength is received and detected.

Such an imaging sensor f4FI is not connected to the processor #I49. The processing mechanism 49 includes an amplifier 411-Hso that amplifies the electrical signal from the imaging sensor 47 and converts the amplified analog signal into a digital signal.
1. Compare the voltage in the amplifier circuit J0 with a reference voltage obtained from normal glass pulp 12, which has been set as a reference value in advance. It is equipped with an abnormality determination circuit II which determines whether there is peeling or uneven cape of the phosphor cover H16 on the detection surface and sends a signal based on the determination.

However, the above support I! ! , J is provided with a movable shaft 5z capable of rotating once, and this movable shaft Ml is set at the removal position 101@l' knee and the shaft jl a
It is metered parallel to -j-. Further, a conveyance station 51 is connected to this removal position 101 to which the glass pulp 1z determined to be good at the above-mentioned determination position ioz is transferred. The conveyance chute j1 is provided with a pair of rails 54.54, and these rails 54. The front end of the ls4 is spaced apart in the left and right direction, and the movable shaft 52
The front end portions are spaced apart and opposed to mounting grooves so and so located at the removal position 103, respectively.

And this rail ls4. On the ISD, the glass bulb 32 determined to be good is removed and placed in position 10.
1, and the glass bulb 32 is conveyed to a mounting machine (not shown) at the end of the conveying chute 51, where the macanto is sealed by known means. Also, take out positive, John tO
S is provided with a defective product removal chute 55 into which the glass bulb 32 determined to be defective at the determination position ioz is transferred. The unnecessary product removal chute 55 includes a pair of rails li, 56 spaced apart from each other on the left and right, and these rails 56, 56 are fixed onto the base l via brackets sr, 5ryx, and are positioned below the transport chute 53. ing. The front ends of rails ii and si are raised upward and extended to the outside of the support plate 18°21, so that according to the rule g#, 1g<Dllll
ll is the transport shoe) 610) Front! It is located closer to the mounting groove 10 in the out-of-service position los than the position 1111. Incidentally, the rear end of the rail 1g $1g is raised upward so that the glass bulb 11% transferred into the defective product removal chute 55 can be docked with 11% varnish. However, the movable shaft 1
A pair of shutters ia and iz are attached to the glass bulb 77t moved to the take-out position taX to selectively guide the glass bulb 77t to either the transport chute 51 or the defective product removal shoe 15. These shutters Ml
, II are mounting grooves se, so located on the same plane as the conveyor shoe) jl, and whose tips are led out to both sides of the support plate IMI and located at the removal position 108.
It is led out to the side of the. And these shutters stt
, is are rotated downward together with the movable shaft 52 when the glass bulb 12 determined to be defective is moved to the removal position ios. A rotation mechanism 59 for rotating this movable shaft 5.2% is attached to the end side. That is,
A rotary shaft 60 is rotatably attached to one of the supporting walls 2, located below the movable shaft 52, and is rotatably attached thereto.
(b) A second 'gear 66 that meshes with the first gear 61 fixed to the movable shaft 52 is fixed to one 11111 part of the movable shaft 60. In addition, a holder 62 is used for dissecting the moving shaft 60 in other directions.
(2) The base end of the movable arm 61 is welded to the tortoise holder 62. The tip of this rotating arm 6J is connected to the piston rod 65 of the air cylinder 64.
The air cylinder 64 is operated based on a signal from the abnormality determination circuit 51 of the processing mechanism 49.

Next, regarding the operation of the above structure, the glass bulb 11 sent out from the 0° phosphor wave film coating device is as follows.
Guide rail! 5, 15, and both ends of the guide rails ss and srs are at supply position 1.
It is fitted into the mounting grooves zo and go located at 01.

Then, by the operation of the air cylinder 14, the support plate 28°21
When the is rotated 1 pitch, the mounting groove 3# into which the glass bulb 12 is fitted is moved to the determination position J0'2, and the next mounting groove 3# is moved to the supply position tui, where the same process as described above is carried out. The next best glass bulb 1
1 is inserted. Further, when the support @za, sit is rotated by l pitch, the locking pawl 2J is moved in the direction of arrow B (b) via the air cylinder 11i1, and its tip engages the locking pawl @t9 of the locking ratchet wheel 11. Together, the support plate 11.
11 positioning, here, the tube-shaped log lamp 4
When β is turned on, the light from this herogen lamp 41 is directed to the support plate II.

The imaging sensor 4F located at the 1 judgment position IDI illuminates the detection surface of the glass bulb Il supported between 21 and 1.
Light transmitted through the glass pulp 32 at the determination position IDI is incident. In other words, the single-tube octarogen lamp 45 and the glass bulb S.2 are in a positional relationship overlapping on the same axis when viewed from the imaging sensor f41@, and this glass bulb 32'%: The transmitted light is transmitted through the imaging sensor. 47, and as a result, the band-shaped imaging signal of the detection field of view is input to the abnormality determination circuit 5. In this case, the detection surface of the Japanese glass pulp 32 on the photographing unit sensor 42 is white.

In other words, a predetermined output is obtained for a normal part of the phosphor film 36 with no peeling or unevenness, and vice versa (in other words, if the phosphor film 36 is peeled off or the film thickness is extremely thin). The output is reduced in abnormal areas with uneven color, and an imaging signal is output based on the color change on the detection surface.

Then, in synchronization with the scanning of the imaging sensor f4F, the air cylinder 41 is operated to protrude the piston rod 44, and the roller 40 (b) rolled by the motor S8 is moved to the judgment position TOZ&J glass pulp 12. come into contact with By this rolling contact, the glass bulb 11 is attached to the mounting groove 1.
36 (P) is rotated in O, and the surface detection of the entire circumference of the glass pulp J2 is performed. In the case of 8:, since the roller 14 is provided in the mounting groove Jo, the sliding
IIIJ! There is little resistance and it rotates smoothly. And abnormal edition'fi! - path 51 compares the voltage of the imaging signal from the imaging sensor r with a reference voltage, and this imaging signal is detected on the detection table -
It is determined whether the signal indicates an abnormality or a signal indicating normality. When the surface detection of the glass bulb 1z is completed in this way, the locking pawl 2J is returned to its original position, and then the support plate 28°11 is rotated one pitch at a time again, and the glass bulb 12, which was in the judgment position 701, is removed and the position is removed. 71128 and supply position l
The glass bulb 31 in #1 has a positive judgment of V″a-11
Moved to 11. In addition, in synchronization with the rotation of the support plate 28°11, a signal from the abnormality determination Hsi is sent to the air cylinder 6.
4 is input. That is, when a signal determined to be normal by the abnormality determination circuit 51 is input to the air cylinder C4, this air cylinder #4 is connected to the piston rod 1f! 7 protrudes, thereby swinging the rotating arm 63, and this swinging movement causes the rotating shaft 60. The shutter 58.
1511, and these shutters xa, sa are attached to mounting grooves J# with their tips located in removal position III.
75. ? are communicated. Therefore, when the glass bulb 12 whose surface detection has been completed is placed in the removal position 703, the glass bulb 32 rolls out from the mounting groove J0, and the shutters III, El and 4. ! It rotates and moves up the transport chute 53, and is transferred to the mounting machine at this terminal end.

On the other hand, when a signal determined to be abnormal by the abnormality determination circuit 51 is input to the air cylinder 64, this air cylinder 6
4 operates so as to be inserted into the piston rod gj'.

Then, the rotating arm 61 is moved in the opposite direction Cm to the above-mentioned swinging direction, and the fruit-setting shutters ia and ss are rotated downward, so that the first J11s is directed toward the # end fllyie of the defective product removal shoe 55. . Therefore, when the glass bulb 12 determined to be defective is placed in the removal position 10J, this glass bulb 32 rolls out from the mounting groove J#pl, and then the defective product is removed ν! −) j This defective product is removed without being sent to J and sent to the mounting machine side; −) j It is stocked in #.

Therefore, as can be seen from the above description, this surface detection device makes it possible to optically detect defects such as peeling of the silicon yt coating S6 and color unevenness due to changes in film thickness.

Therefore, the detection table aIC2 of the glass bulb 1z can be detected to determine whether there is an abnormality or not. Therefore, it has good manufacturing efficiency and is suitable for mass production.

Moreover, this detection device has a herogen lamp 41ik inserted in the center between the support plate zs and Hit. :Moni,
One glass bulb 321 is attached to the mounting groove 3o of this support [z se 2 g, and the glass bulb 32 is sequentially moved around the helogen lamp 45 by rotating the support plate 28.2 mV intermittently. With this arrangement, the glass bulb 32 and the herogen lamp 45 can be arranged in a close positional relationship, which improves the brightness of the detection surface of the glass bulb 32 and prevents peeling of the phosphor coating 36 and the film. Color irregularities on the detection surface due to changes in thickness are clearly revealed, improving reliability of inspection. Also glass bulb JJ)
J-Supporting mounting l! ! 113o... is opened in the through hole 29 into which the herogen lamp 45 is inserted. First, the entire detection surface of the glass bulb 32 can be accurately detected without any shadow of the part inserted into the glass bulb S2 being inserted into the mounting @SO... on the detection surface. and contribute to quality improvement.

At the same time, this device has a glass bulb 12 on the substrate l.
Support nri to support, zsaxzm to logon lamp 45
Since the imaging mechanism 46 and the like are integrally attached to form a unit, it has advantages such as being able to be moved to a necessary production line.

Although in the above embodiment four mounting grooves were provided on the support plate, the number of mounting grooves is not limited to this, and the number of support plates is not limited to one pair, but may be one pair, for example, three. It may be.

Furthermore, in the eleventh embodiment, the support plate is intermittently rotated via the air cylinder and the ratchet mechanism, but it may also be intermittently rotated by a motor capable of controlling the rotation angle.

The present invention described in detail above rotates intermittently in the circumferential direction a plurality of support plates provided facing each other at a distance, and -1 is opened on the outer periphery nAIfi of these support plates, and the other side is opened through the center of the support plates. Provided in the mounting fllj1 opening into the hole,
A straight glass bulb coated with a phosphor coating is removably inserted into this mounting groove, and a light source that irradiates light onto the surface of the glass bulb is arranged along the axis of the through hole. , and on the outside of the glass bulb, there is provided an image mechanism (m) that takes images in a band shape along the tube axis direction on one surface, and in the axial direction (ro ) rotation Φ (b) rotation m1ll11. With this range, it is possible to optically detect defects such as peeling of the phosphor coating or color unevenness due to changes in film thickness, and it is possible to manually determine whether there is an abnormality on the detection surface or not. This can be done automatically without any manual inspection, improving reliability and reconnaissance efficiency compared to visual inspection by an operator. Therefore, it is possible to save labor in lamp inspection, and it is convenient for mass production. Moreover, in this device, the glass bulb is moved around the light source, so it is possible to bring the glass bulb and the yts close together, which eliminates color unevenness on the detection surface due to peeling off of the phosphor film. It appears clearly and can be detected reliably. In addition, since the mounting groove is opened in the through hole, the shadow of the mounting groove appears on the detection surface of this bulb even though it is placed on the opposite side of the glass bulb with respect to the ytvn imaging mechanism. Therefore, the entire detection surface of the glass bulb can be accurately detected, contributing to quality improvement and exhibiting excellent effects such as diaphragm.

[Brief explanation of the drawing]

The layer plane shows one embodiment of the present invention, and FIG. 1 is a plane @, II
2@ is a side view, ``@3 is a sectional view taken along line 1-2 in FIG. 1, and FIG. 114 is a sectional view showing the positional relationship of the imaging mechanism, the glass bulb, and the light source. Fig. 5 is a side view of the ratchet mechanism, and Fig. m6 is a sectional view taken along line vii in Fig. il1. 28...Support plate, J! l-...Through hole, 30...Mounting groove. S2... Bulb % 3 #... Fluorescent coating % 40
...(b) Turning point, mechanism (roller), 45...ytfi
(Helogen lamp), 4C...imaging mechanism.

Claims (2)

[Claims] (1) A plurality of support plates each having a through hole in the center are provided facing each other and rotated intermittently in the circumferential direction at the same time. A plurality of mounting grooves are provided in the hole at equal intervals in the circumferential direction, and a straight valve valve coated with an integral coating is removably inserted into the mounting grooves, and the surface of the valve is A light source χ which emits light to What is claimed is: 1. A surface inspection device for a fluorescent lamp, characterized in that it is provided with an imaging mechanism that rotates the imaged gold pulp in a ring direction within a mounting groove. (2) A surface inspection device for a fluorescent lamp according to claim 1, wherein a rolling groove 90 is provided on the surface of the bulb in the mounting groove.