JP3563853B2 - Cathode ray tube dividing device and cathode ray tube dividing method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cathode ray tube splitting apparatus and a cathode ray tube splitting method which are most suitable for disassembling and processing a cathode ray tube (CRT).
[0002]
[Prior art]
In recent years, recycling of resources and prevention of environmental destruction have been highlighted. In response to this demand, research on the reuse of cathode ray tubes (CRTs, cathode ray tubes) of used television sets is progressing in various fields.
The cathode ray tube is used for a television set, other display devices, or the like. As shown in FIG. 10, the cathode ray tube T has a panel section PA and a funnel section F. The panel portion PA is made of a substantially transparent glass material, and the funnel portion F is made of a glass material mixed with lead. The funnel portion F and the panel portion PA are formed in a tubular shape by frit glass (solder glass) by welding.
[0003]
The cathode ray tube T is externally provided with an electron gun, a deflection yoke and the like on the rear side. An aperture grill (or shadow mask) M is provided inside the cathode ray tube T, and phosphors of three colors of red, blue, and green are regularly applied to a phosphor screen on the inner surface side of the panel unit PA. I have. An explosion-proof band is attached to a portion where the panel portion PA and the funnel portion F are welded together with an explosion-proof tape.
The panel portion PA and the funnel portion F of the cathode ray tube T, particularly, the panel portion PA are relatively easy to reuse because they are made of a glass material. For this reason, when reusing the cathode ray tube, there is an attempt to cut the panel portion PA from the cathode ray tube T and to reuse the cathode ray tube.
For example, as shown in FIG. 11, a method is proposed in which a panel portion and a funnel portion are divided by scratching four corner portions (corner portions) CN of the side surface of a cathode ray tube, and then generating heat distortion by heating with a heater. Have been.
[0004]
[Problems to be solved by the invention]
However, this division method has the following problems.
Since the scratches on the four corners of the cathode ray tube are very small, it takes a considerable amount of time to divide the funnel and the panel even if the scratches are heated. Moreover, it is difficult to divide the panel portion and the funnel portion neatly.
That is, as shown in FIG. 12, even if cracks CC are formed between the grooves (scratches) C provided at the four corners of the cathode ray tube T, if a gap d where the cracks do not remain remains, the panel portion and the panel portion are damaged. It is difficult to cleanly split the funnel. As described above, the interval d in which the crack CC does not occur occurs at a frequency of about 20 to 30% of the number of cathode ray tubes to be divided. In this case, it takes a considerable amount of time for the cracks to extend further and the distance d to become zero and the cracks to be connected to each other. Also, depending on the state of the glass and the manner of scratching, the time for cracking varies. In particular, the cracking time is different between the periphery of the long side of the cathode ray tube and the periphery of the short side of the cathode ray tube, and the cracks that have occurred up to that point have considerably released the strain.
[0005]
In particular, the work tact of this type of splitting apparatus for a cathode ray tube is about three times longer than the work tact of the apparatus at the former stage and the latter stage of the splitting apparatus, and the working efficiency is lowered. Furthermore, if the cracks around the side surface of the cathode ray tube do not connect well at the center of the periphery of the side surface, it is not possible to check whether the cathode ray tube has been split, and even if the cathode ray tube is taken out after a certain period of time, the cathode ray tube is removed. Is not split, and the reliability of the splitting operation is low.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a cathode ray tube splitting apparatus and a cathode ray tube splitting method that can surely split a cathode ray tube in a short time.
[0006]
[Means for Solving the Problems]
Cathode ray tube splitting device according to the present invention is a cathode ray tube dividing device for dividing a cathode ray tube panel portion and the funnel portion, and a support means for supporting the cathode ray tube, four sides around the cathode ray tube a groove portion forming means for forming a groove for dividing the corner, around the sides of the cathode ray tube by heating the side periphery including at least the corners of four for split formed in the corner portion of the cathode ray tube A configuration is provided that includes a heating unit for giving thermal distortion, and a vibration unit for giving vibration to the cathode ray tube heated by the heating unit from a dividing groove .
A method of dividing a cathode ray tube according to the present invention is a method of dividing a cathode ray tube for dividing a cathode ray tube into a panel portion and a funnel portion . Forming a groove portion, and heating the periphery of the side surface including the dividing grooves formed in at least the four corners of the cathode ray tube by heating means to apply thermal distortion to the periphery of the side surface of the cathode ray tube; Vibrating the cathode ray tube heated by the heating means from the dividing groove by the vibrating means.
In the present invention, when the cathode ray tube is divided into a panel portion and a funnel portion, the groove forming means forms a dividing groove at a corner of the cathode ray tube. Heating means, Ru gives thermal distortion to the cathode ray tube side motive by heating the periphery of the side surface of the cathode ray tube. Their to, vibrating means vibrates the corner of the cathode ray tube. By doing so, even if a crack does not connect between the corners around the side surface of the cathode ray tube, the cracks are quickly connected using the vibration of the vibrating means, and the cathode ray tube is connected to the panel. And the fan-well part can be surely divided in a short time.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and therefore, various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. It is not limited to these forms unless otherwise stated.
[0009]
FIG. 1 is a front view showing a preferred embodiment of a cathode ray tube splitting device according to the present invention. FIG. 2 is a perspective view showing the device for dividing the cathode ray tube of FIG.
1 and 2, the splitting apparatus for a cathode ray tube includes a support unit 10, a groove forming unit 50, a heating unit 70, a positioning unit 90, a control unit 100, and the like.
The support means 10 includes a vertical movement mechanism 11, a suction means 13, a support plate 24, and the like.
The vertical movement mechanism 11 is a mechanism for vertically moving and positioning the cathode ray tube 200 placed on the support plate 24 in the arrow Z direction. The vertical movement mechanism 11 includes a base 12, a plurality of guide bars 18, screws 17, a motor 19, and the like.
The motor 19 is fixed to the base 12, and a pinion 19 a of an output shaft of the motor 19 is engaged with a screw 17. The upper end of the screw 17 is fixed to the support plate 24. The screw 17 is fixed so as not to rotate with respect to the support plate 24. When the pinion 19a of the motor 19 rotates, the pinion 19a linearly moves the screw 17 along the arrow Z direction. The support plate 24 can be moved up and down and positioned in the arrow Z direction.
[0010]
The upper end of the guide bar 18 is fixed to the support plate 24, but the lower end of the guide bar 18 is supported so as to be movable in the axial direction with respect to the bearing 12 a of the base 12. Therefore, when the support plate 24 moves up and down in the arrow Z direction, these guide bars 18 firmly guide the Z direction.
The support plate 24 is fixed to the upper ends of the plurality of guide bars 18 described above. The support plate 24 includes the support pins 14 and the vacuum suction pads 23. The vacuum suction pad 23 is made of, for example, an elastic member, and can detachably suction and hold the surface of the panel 210 of the cathode ray tube 200 by the operation of the suction means 13.
If the support pins 14 are preferably made of slippery plastic or metal (for example, iron), the surface of the panel portion 210 will not be damaged.
The motor 19 of the vertical movement mechanism section 11 can selectively position the cathode ray tube 200 at the first position PL1, the second position PL2, and the third position PL3 based on a signal from the control section 100. .
[0011]
Next, the positioning means 90 will be described.
The positioning means 90 shown in FIGS. 1 and 2 includes four pads 91, 92, 93, and 94. These pads 91, 92, 93, 94 are made of, for example, iron, and can press the four sides 220, 221, 222, 223 around the four corners of the cathode ray tube 200 for positioning. That is, the pads 91, 92, 93, 94 press the side faces 220, 221, 222, 223 of four sides by the cylinders 95, 96, 97, 98, or press the side faces 220, 221, 222, 223 of the four sides. And away from it.
Thus, the central axis of the cathode ray tube 200 substantially coincides with the central axis of the vertical movement mechanism 11.
When the cathode ray tube 200 is thus positioned with respect to the support plate 24 of the vertical movement mechanism 11, the suction means 13 sucks the front side of the panel 210 of the cathode ray tube 200 via the vacuum suction pad 23. Hold. The surface of the panel section 210 is firmly and horizontally supported by, for example, four support pins 14.
[0012]
Next, the heating means 70 will be described with reference to FIGS.
The heating means 70 includes four heater wires 71, 72, 73, 74 and a heating power supply 75.
Each of the heater wires 71 to 74 generates heat when a current is supplied from a heating power supply 75. These heater wires 71 can be made by twisting, for example, three nichrome wires. By doing so, it is possible to prevent the heater wire 71 from being cut and the heater wire from being cast. By preventing the shape of the heater wire, it is possible to prevent the heater wire from floating, increase the thermal efficiency, and shorten the cutting time. Note that these heater wires 71 are mutually coated with insulation.
The heater wire 71 corresponds to the periphery 220 of the long side of the cathode ray tube 200, the heater wire 72 corresponds to the periphery 221 of the short side of the cathode ray tube 200, and the heater wire 73 corresponds to the side surface of the long side of the cathode ray tube 200. The heater wire 74 corresponds to the periphery 223 of the short side of the cathode ray tube 200. That is, these four heater wires 71 to 74 are arranged in a rectangular shape when viewed from above.
[0013]
As shown in FIG. 3, the heater wire 72 is provided so as to be pulled between the mounting portions 72a. Similarly, the heater wire 74 is attached so as to be pulled between the attachment portions 74a, 74a. The motors 74b, 74b have feed screws 74c, 74c, respectively. The feed screw 74c has a first screw part 74d and a second screw part 74e. The first screw portion 74d and the second screw portion 74e have mutually opposite thread cuts. Accordingly, when the motor 74b operates and the feed screw 74c rotates, the mounting portions 72a and 74a can move in a direction approaching each other or in a direction away from each other. As a result, the opposed heater wires 72 and 74 move at the same pitch in the direction approaching or moving away from the cathode ray tube 200.
[0014]
The heater wire 71 is attached so as to be pulled between the attachment portions 71a, 71a. Similarly, the heater wire 73 is attached so as to be pulled between the attachment portions 73a. Each of the motors 71b, 71b has a feed screw 71c. The feed screw 71c has a first screw portion 71d and a second screw portion 71e. The first screw portion 71d and the second screw portion 71e have opposite directions in which the threads are cut. Therefore, when the motor 71b operates, the mounting portions 71a and 73a move in a direction approaching each other or in a direction away from each other. Accordingly, the heater wires 71 and 73 can move at a same pitch in a direction approaching or away from the cathode ray tube 200.
[0015]
As shown in FIG. 6, in the embodiment of the present invention, a vibration unit 880 is further provided. The vibrating means 880 has four ultrasonic transducers 900, a power supply 910 for the ultrasonic transducers 900, and four actuators 930. The power supply 910 is controlled by a command from the control unit 100. Each of the four ultrasonic transducers 900 has a horn 920, and each ultrasonic transducer 900 is disposed corresponding to the corner CN of the cathode ray tube 200 and obliquely downward with respect to the corner CN. I have. Each actuator 930 moves each ultrasonic transducer 900 in the direction of arrow J in accordance with a command from the control unit 100 and avoids the heater wire, so that the horn 920 of each ultrasonic transducer 900 corresponds to the corresponding cathode ray tube 200. Can be applied to the corner CN of the contact. Each actuator 930 can operate the horn 920 away from the corresponding corner CN of the cathode ray tube 200 by operating in reverse.
[0016]
The frequency of the vibration applied to the cathode ray tube 200 by the horn 920 of the ultrasonic vibrator 900 is preferably 100 to 1000 Hz.
[0017]
Next, the groove forming means 50 will be described with reference to FIGS. The groove forming means 50 has a total of four rotary cutters 51. These four rotary cutters 51 are for forming grooves 300 for division at four corners CN of the cathode ray tube 200 as shown in FIG.
The rotary cutters 51 are mounted on pedestals 52, respectively. The rotary cutter 51 is, for example, an electroformed or electrodeposited artificial diamond grindstone, and is rotated by a motor 53. Moreover, each cutter 51 has a spring 54 for adjusting the force when pressing against the corner CN of the cathode ray tube 200 in FIG.
The motor 55 rotates the feed screw 56. The feed screw 56 includes a first screw portion 57 and a second screw portion 58, and the first screw portion 57 and the second screw portion 58 are threaded in opposite directions.
Thus, when the motor 55 is operated and the feed screw 56 rotates, the pedestals 52, 52 can move in a direction approaching each other or in a direction away from each other.
The motors 19, 55 and 71b, 74b in FIG. 1 (see FIG. 3), the cylinders 95, 96, 97, 98 in FIG. 2, the power supply 910 in FIG. Is done.
[0018]
Next, a method of dividing a cathode ray tube using the above-described cathode ray tube separating apparatus will be described.
First, according to a command from the control unit 100 in FIG. 1, a transport unit (not shown) transports the cathode ray tube 200 onto the support plate 24 as shown in FIG. In this case, the support plate 24 is positioned at such a height that the cathode ray tube 200 is located at the first position PL1. Here, the centering of the cathode ray tube 200 with respect to the support means 10 is performed using the four pads 91, 92, 93 and 94.
[0019]
Next, in a state where the four pads 91 to 94 are separated from the cathode ray tube 200, the motor 19 of the vertical movement mechanism unit 11 in FIG. 1 is operated, and the cathode ray tube 200 is moved from the first position PL1 to the second position PL2. Down to. At the second position PL2, the four corners of the cathode ray tube 200 are at positions corresponding to the four rotary cutters 51. From this, when the motor 55 of FIG. 4 is operated, a slight groove or scratch 300 is formed by the four rotary cutters 51. Next, the motor 19 of the vertical movement mechanism 11 is operated, and the support plate 24 is lowered together with the screw 17 acting like a rack by the rotation of the pinion 19a. As a result, the cathode ray tube 200 is positioned from the second position PL2 to the third position PL3. That is, when the cathode ray tube 200 is positioned at the third position PL3, the cathode ray tube 200 is in a state surrounded by the four heater wires 71 to 74. When the motors 71b and 74b shown in FIG. 3 are operated in this state, the four heater wires 71 to 74 come into contact with the peripheral portions 220, 221, 222 and 223 of the four sides of the cathode ray tube 200 as shown in FIG. The surroundings are heated to give sufficient thermal strain in advance. The heating time at this time is, for example, about 30 seconds to 2 minutes.
[0020]
As shown in FIG. 6, for example, four heater wires 71 to 74 heat the corresponding side circumferences 220 to 223, and after a certain time elapses, as shown in FIGS. The horn 920 is applied to the position of the groove 300 at the corner CN of the cathode ray tube 200 or the vicinity of the groove 300 to apply vibration. When this vibration is applied, the horn 920 of each ultrasonic transducer 900 hits the corner CN so as to avoid the heater wire, so that the heater wire is not disconnected.
By applying the vibration, cracks CC, CC generated between the adjacent corners CN, CN of the cathode ray tube 200 starting from the grooves 300, 300 are formed in all the side surfaces 220, 221, 222, 223 as shown in FIG. Formed.
[0021]
When the cathode ray tube 200 of, for example, about 21 inches is divided into the panel section 210 and the funnel section 211 using the embodiment of the present invention, the average time required for the crack CC to enter the four corners CN is 60 seconds. The total average time required for division when adjacent cracks CC did not connect at once was 90 to 100 seconds. That is, the cathode ray tube 200 is completely and reliably broken in 90 to 100 seconds.
On the other hand, when the cathode ray tube 200 of about 21 inches is divided into the panel part 210 and the funnel part 211 by the conventional method, the normal time until the crack CC enters the four corners CN is 110 seconds. When the adjacent cracks CC did not connect at once, the total average time required for complete division was 180 seconds.
As described above, when the dividing apparatus according to the embodiment of the present invention is used, the dividing time is only half, whereby the cathode ray tube 200 can be divided into the panel section 210 and the funnel section 211 reliably and in a short time.
Therefore, the work tact of the splitting device of the cathode ray tube and the work tacts of the device at the preceding stage and the device at the subsequent stage of the splitting device can be brought close to each other, so that the efficiency of recycling operation can be improved.
[0022]
The present invention is not limited to the above embodiment.
FIG. 9 shows another embodiment of the present invention. In FIG. 9, a tool 1900 for applying another vibration is used instead of the ultrasonic transducer 900 shown in FIG. This tool 1900 is shaped like a flathead screwdriver and has a pointed contact 1920 to which vibration is applied from a vibration source 1910. The contacts 1920 are respectively applied to the corners CN of the cathode ray tube 200 by the operation of the actuator 1930 to apply vibration.
In the embodiment described above, the ultrasonic transducer 900 in FIG. 6 and the tool 1900 in FIG. 9 are configured to apply vibration to the corresponding corner CN of the cathode ray tube 200. For example, even if vibration is applied to substantially the center of the four sides 220, 221, 222, and 223 of the four sides of the cathode ray tube 200 shown in FIG. 6, the cathode ray tube 200 is similarly made up of the panel portion 210 and the funnel portion. It can be divided into 211.
The number of ultrasonic transducers in FIG. 6 is not limited to four, but may be two diagonally.
In addition, the order of the step of forming a groove in the corner and the step of heating the periphery of the side surface may be reversed.
Further, as shown in FIG. 2, the positioning means 90 may be configured by combining, for example, two positioning cylinders 91a, 92a, 93a, 94a made of iron and cylinders 95 to 98. As a result, the side surfaces 220 to 223 are curved, but the cathode ray tube 200 can be correctly positioned even in this case.
[0023]
【The invention's effect】
As described above, according to the present invention, the cathode ray tube can be divided surely in a short time.
[Brief description of the drawings]
FIG. 1 is a front view showing a preferred embodiment of a cathode ray tube splitting device according to the present invention.
FIG. 2 is a perspective view showing a device for dividing the cathode ray tube of FIG. 1;
FIG. 3 is a perspective view showing a configuration of a heating unit of the dividing device of FIG.
FIG. 4 is a perspective view showing an example of the groove forming means of FIG. 1;
FIG. 5 is a view showing an example of a groove at a corner of a cathode ray tube formed in a groove forming means.
FIG. 6 is a perspective view showing a state in which an ultrasonic transducer is to be applied to a corner of a cathode ray tube.
FIG. 7 is a plan view showing a state in which an ultrasonic transducer is applied to a corner of a cathode ray tube to apply vibration.
FIG. 8 is a diagram showing a state in which cracks are formed around the side surface of the cathode ray tube.
FIG. 9 is a perspective view showing another embodiment of the present invention.
FIG. 10 is a diagram showing a conventional method of dividing a cathode ray tube into a funnel portion and a panel portion.
FIG. 11 is a perspective view showing four corners of the conventional cathode ray tube of FIG.
FIG. 12 is a diagram showing a state in which a groove is formed in a groove and a part of the groove by heating after cracks are formed in four corners in the related art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Support means 11 Vertical movement mechanism part 50 Groove forming means 70 Heating means 71-74 Heater wire 90 Positioning means 100 Control means 200 Cathode ray tube 210 Panel part 211 Funnel part 220-223 Side circumference 300 Groove 880 for vibration division CN Corner

Claims (4)

A cathode ray tube dividing device for dividing a cathode ray tube into a panel portion and a funnel portion,
Support means for supporting said cathode ray tube,
A groove portion forming means for forming a groove for dividing into four corners of the side surface around the cathode-ray tube,
A heating means for providing thermal strain side by heating the periphery around the sides of the cathode ray tube including a corner portion of a split which is formed on at least the four corners of the cathode ray tube,
An apparatus for separating a cathode ray tube , comprising: vibrating means for applying vibration from the dividing groove to the cathode ray tube heated by the heating means. The splitting of the cathode ray tube according to claim 1 , wherein the vibrating means includes a horn portion and an ultrasonic vibrator, and the horn portion contacts the groove for splitting to apply vibration. apparatus. The vibration unit according to claim 1, wherein the vibration unit includes an ultrasonic vibrator having a contact having a sharp tip, and the contact abuts on the groove for division to apply vibration . Cathode ray tube dividing device. A method of dividing a cathode ray tube for dividing a cathode ray tube into a panel portion and a funnel portion ,
Forming grooves for division at four corners of the side surface of the cathode ray tube by the groove forming means;
Heating means for heating around the side surface including the dividing groove formed at at least the four corners of the cathode ray tube to give thermal distortion around the side surface of the cathode ray tube;
Applying a vibration from the dividing groove to the cathode ray tube heated by the heating means by vibrating means .

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