JP2001222955A - Cathode-ray tube splitting device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for splitting a cathode-ray tube in a short time without a fail. SOLUTION: The splitting device 10 for a cathode-ray tube is used to split the panel portion 210 and the funnel portion 220 of the cathode-ray tube 200 and a heating portion 14 gives a heat distortion around a groove 400 of the cathode-ray tube 200 provided for splitting the panel portion 210 and the funnel portion 210. The splitting device comprises the heating portion 14 having a first heating members 22A to 22D and No.2 heating members 24A to 24D laid out at both sides of the groove 400, respectively, and a cooling portion 16 cooling the parts around the groove 400 heated by the heating portion 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cathode ray tube (CR)
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 T).

[0002]

2. Description of the Related Art In recent years, recycling of resources and prevention of environmental destruction have been highlighted. The problem of discarding television receivers and computer display devices has been reported, and the reuse of these materials and the recycling of parts have become major issues. In response to this demand, research on the reuse of cathode ray tubes (CRTs, cathode ray tubes) of used television receivers is progressing in various fields. Display devices for television receivers and computers
It has a cabinet, a cathode ray tube made of glass in the cabinet, a deflection yoke wound with a copper wire, and the like.

In the case where materials and parts of a television receiver and a display device of a computer are used for recycling, it is necessary to collect each of the parts having different materials.
Incidentally, the cathode ray tube has a panel portion and a funnel portion, and the panel portion and the funnel portion are made of glass having different compositions. Therefore, in order to recycle the panel portion and the funnel portion into glass, it is necessary to divide the panel portion and the funnel portion into respective glasses.

The panel portion is made of a substantially transparent glass material, and the funnel portion is made of a glass material mixed with lead. The funnel portion and the panel portion are formed in a tubular shape by welding with frit glass (solder glass).

[0005] The cathode ray tube is externally provided with an electron gun, a deflection yoke and the like on the back side thereof. An aperture grill (or shadow mask) is provided inside the cathode ray tube.
Blue and green phosphors are regularly applied. An explosion-proof band is attached to a portion where the panel portion and the funnel portion are welded together through an explosion-proof tape. The panel part and the funnel part of the cathode ray tube, particularly the panel part, are made of a glass material, so that they are relatively easy to reuse. For this reason, when reusing a cathode ray tube,
In particular, the panel is cut from the cathode ray tube and reused. For example, a method has been proposed in which a panel portion and a funnel portion are divided by scratching four corner portions (corner portions) of the side surface of a cathode ray tube and then heating the heating portion with a heating wire to cause thermal distortion.

In the prior art, a heating wire is heated by applying an electric current after a heating wire is brought into contact with the glass surface, and a thermal strain is formed at a contact portion between the heating wire and the glass, and the strain generating portion of the glass becomes a stress. Cracks run through the glass when it becomes unbearable, dividing the panel and funnel. However, in this dividing method, it takes time until the glass is divided, because heating is continued until cracks run in the glass of the panel portion and the funnel portion. Conventionally, the time until this division is, for example, 2 minutes. Further, the number of television receivers and computer display devices to be collected in the future is increasing year by year, and it is desired to reduce the time for dividing glass into a panel portion and a funnel portion.

In Japanese Patent Application Laid-Open No. 9-169530, one heater wire is arranged in a groove formed on the peripheral surface of a cathode ray tube, and cooling air is supplied to four corners of the cathode ray tube. One that splits a cathode ray tube has been proposed. However, in this prior art, since only one heater wire is used for each side surface of the cathode ray tube, a long time is required to heat a portion near the groove, and there is still a problem that the efficiency of division work cannot be increased. .

[0008]

In particular, the work tact of this kind of cathode ray tube splitting device is about three times as long as the work tact of the former stage and the latter stage of the splitting device. Come. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a cathode ray tube dividing apparatus and a cathode ray tube dividing method which can surely divide a cathode ray tube in a short time.

[0009]

According to a first aspect of the present invention, there is provided a cathode ray tube dividing apparatus for dividing a panel portion and a funnel portion of a cathode ray tube, wherein a groove for dividing the panel portion and the funnel portion is formed. A heating unit for applying thermal strain to a portion of the formed cathode ray tube near the groove, the heating unit having a first heating member and a second heating member arranged with the groove interposed therebetween; And a cooling unit that cools a portion near the groove heated by the unit. In the first aspect, the first heating member and the second heating member of the heating unit are arranged with the groove interposed therebetween. When the first heating member and the second heating member apply thermal strain to a portion near the groove, a tensile force is generated in a portion near the groove, and a force that tears the groove can be positively applied. Then, the cooling unit cools a portion near the groove heated by the heating unit. Thereby, the panel portion and the funnel portion can be surely and quickly divided in the groove. From this, the division work efficiency can be improved.

According to a second aspect of the present invention, in the splitting apparatus for a cathode ray tube according to the first aspect, the cooling unit is disposed corresponding to the groove, and the cooling unit is provided with a cooling medium supply unit and the cooling unit. A cooling medium guide for guiding the cooling medium from the medium supply unit to the vicinity of the groove.

According to a third aspect of the present invention, in the splitting device for a cathode ray tube according to the second aspect, the cooling medium is air or water.

According to a fourth aspect of the present invention, in the splitting device for a cathode ray tube according to the first aspect, the heating unit has a power source, and the heating unit generates heat by passing a current supplied from the power source. The first heating member and the second heating member are nichrome wires.

According to a fifth aspect of the present invention, in the splitting apparatus for a cathode ray tube according to the first aspect, the set of the first heating member and the second heating member of the heating section is provided at a position opposite to the cathode ray tube. The grooves are arranged corresponding to the grooves formed on one side surface or four side surfaces, respectively.

According to a sixth aspect of the present invention, in the splitting device for a cathode ray tube according to the first aspect, the cooling unit is disposed between the first heating member and the second heating member of the heating unit. .

According to a seventh aspect of the present invention, there is provided a method for dividing a cathode ray tube for dividing a panel portion and a funnel portion of a cathode ray tube, wherein the cathode ray tube has a groove formed for dividing the panel portion and the funnel portion. A heating unit is arranged on a portion near the groove, and a portion near the groove is heated by a first heating member and a second heating member of the heating unit arranged across the groove of the heating unit. A method for dividing a cathode ray tube, comprising: a heating step; and a cooling step of cooling a portion near the groove heated in the heating step by a cooling unit. According to claim 7, the first heating member and the second heating member of the heating section are arranged with the groove interposed therebetween. When the first heating member and the second heating member apply thermal strain to a portion near the groove, a tensile force is generated at a portion near the groove, and a force that tears the groove can be given.
Then, the cooling unit cools a portion near the groove heated by the heating unit. This allows the panel portion and the funnel portion to be quickly split at the groove. From this, the division work efficiency can be improved.

According to an eighth aspect of the present invention, in the method for dividing a cathode ray tube according to the seventh aspect, the cooling medium is guided near the groove by passing through the cooling medium guide.

According to a ninth aspect of the present invention, in the method for dividing a cathode ray tube according to the eighth aspect, the cooling medium is air or water.

According to a tenth aspect of the present invention, in the method for dividing a cathode ray tube according to the seventh aspect, the first heating member and the first heating member of the heating unit, which generate heat by passing a current supplied from a power supply of the heating unit, The second heating member is a nichrome wire.

According to an eleventh aspect of the present invention, in the method of dividing the cathode ray tube according to the seventh aspect, the set of the first heating member and the second heating member of the heating section is provided at a position opposite to the cathode ray tube. The grooves are arranged corresponding to the grooves formed on one side surface or four side surfaces, respectively.

According to a twelfth aspect of the present invention, in the method for dividing a cathode ray tube according to the seventh aspect, the cooling unit is disposed between the first heating member and the second heating member.

[0021]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIG. 1 shows a preferred embodiment of a cathode ray tube splitting apparatus according to the present invention. The cathode ray tube splitting device 10 is a device for splitting a cathode ray tube 200 into a panel section 210 and a funnel section 220. Before describing the cathode ray tube splitting device 10 in detail, the cathode ray tube 20
0 will be briefly described. The cathode ray tube 200 has a panel section 210 and a funnel section 220 as shown in FIG. The cathode ray tube 200 is also called a cathode ray tube, for example, a cabinet 24 shown in FIGS.
0. As shown in FIG.
Is the front cabinet 250 of the cabinet 240
By separating the rear cabinet 260 and the rear cabinet 260, they can be taken out at the time of recycling. Since the cathode ray tube 200 has a circuit board 270, an electron gun 280, an explosion-proof band B, and the like, if the electron gun 280, the circuit board 270, and the explosion-proof band B are removed, the cathode ray tube 2 shown in FIG.
00.

Next, the structure of the cathode ray tube splitting device 10 will be described in detail with reference to FIGS.
The splitting device 10 for a cathode ray tube generally includes a support 1
2, a heating unit 14, and a cooling unit 16. The support portion 12 is a portion that detachably supports the cathode ray tube 200 along the Z direction (vertical direction). The support section 12 can hold the panel glass 214 of the panel section 210 of the cathode ray tube 200 upward, that is, with the funnel section 220 facing down, horizontally.

FIG. 6 shows the cathode ray tube 200 and the heating unit 14, and the cooling unit 16 is omitted for simplification of the drawing. The heating unit 14 includes a heating power supply 20 and four first heating members 22A, 22B, 22C, 22D, and 4.
It has the second heating members 24A, 24B, 24C, 24D. The set of the first heating member 22A and the second heating member 24A is arranged in parallel at an interval along the first side surface portion 200A of the cathode ray tube 200. Similarly another 1st
The set of the heating member 22B and the second heating member 24B is arranged in parallel at an interval corresponding to the second side surface 200B. Another set of the first heating member 22C and the second heating member 24C is arranged in parallel at an interval corresponding to the third side surface portion 200C. Another set of the first heating member 22D and the second heating member 24D is arranged in parallel at an interval corresponding to the fourth side surface 200D.

FIG. 7 representatively shows an example in which a set of the first heating member 22A and the second heating member 24A is arranged in parallel and spaced apart along the first side surface 200A of the cathode ray tube 200. I have. In the other second side surface portion 200B to the fourth side surface portion 200D, the corresponding sets of the first heating member and the second heating member are arranged in parallel at intervals in the same manner as shown in FIG. Have been. As shown in FIG. 6, the upper first heating members 22A to 22D are electrically connected in series to the heating power supply 20. Similarly, the lower second heating members 24A to 24D are connected to the heating power source 2.
0 is electrically connected in series. The driving of the heating power supply 20 is controlled by a command from the control unit 100.
Each set of the first heating member and the second heating member is arranged above and below the flaw 400 so as to sandwich the flaw 400 shown in FIG. 2 formed on the cathode ray tube 200 shown in FIG. This wound 4
The first side portion 200A and the second side portion 200 are preferably formed by a cutter 410 as shown in FIG.
B, formed along the third side surface 200C and the fourth side surface 200D. This cutter 410 has a motor 420
, It continuously rotates in the R direction, for example. But,
This scratch 400 is not formed continuously from the first side surface 200A to the fourth side surface 200D as necessary,
Of course, it may be formed partially.

Next, the cooling section 16 will be described with reference to FIG. The cooling unit 16 includes a cooling medium supply unit 30 and 4.
Cooling pipes (corresponding to cooling medium guides) 70, 71,
72 and 73 are provided. The cooling pipes 70 to 73 are connected in series to the cooling medium supply unit 30. The cooling medium supply unit 30 supplies, for example, inexpensive water or air to the cooling pipe 71 as a cooling medium. The cooling pipes 70 are arranged in parallel at an interval between the first heating member 22A and the second heating member 24A. Similarly, the cooling pipe 71 is connected to the first heating member 2.
2B and the 2nd heating member 24B are arrange | positioned in parallel at intervals. The cooling pipe 72 is arranged in parallel with a space between the first heating member 22C and the second heating member 24C. The cooling pipe 73 is arranged in parallel with a space between the first heating member 22D and the second heating member 24D. FIG. 7 shows an example in which the cooling pipes 70 are arranged at equal intervals between the first heating member 22A and the second heating member 24A. The cooling pipe 71 has a scratch 4 shown in FIG.
It is arranged at a position substantially corresponding to 00.

The upper first heating members 22A to 22D and the lower second heating members 24A to 24D shown in FIG.
24D can also be called a heater wire or a heating wire, for example, a nichrome wire can be adopted. The first heating member or the second heating member employing this nichrome wire can be made by twisting three nichrome wires, for example. By doing so, it is possible to prevent the first heating member and the second heating member from being cut and the first heating member and the second heating member from being formed with a mold. By preventing the first heating member and the second heating member from being attached to the mold, the first heating member and the second heating member are prevented from floating, and the heat efficiency when supplying heat to a portion near the scratch 400 is reduced. Can be raised. Note that the first heating member and the second heating member are not in electrical contact with each other,
Insulation coating is applied. The cooling pipe 71 shown in FIG. 1 may be made of any material such as aluminum or iron, for example, as long as it is heat resistant and has excellent heat dissipation. The drive of the cooling medium supply unit 30 is controlled by the control unit 100.

Next, a method of dividing the cathode ray tube 200 shown in FIGS. 1 and 2 will be described with reference to FIG. The cathode ray tube 200 is mounted in the cabinet 2 as shown in FIG.
40 are taken out of the front cabinet 250 and the rear cabinet 260, and the cathode ray tube 2
From 00, accessory parts such as the electron gun 280, the circuit board 270, and the explosion-proof band B are removed.

Next, in the groove forming step ST1 of FIG. 10, the cathode ray tube 200 is placed on the support portion 12 as shown in FIG.
Is installed. The panel 210 of the cathode ray tube 200 faces upward, and the funnel 220 faces downward. In this state, as shown in FIG. 2, the first side surface 200A and the second side surface 200
A groove 410 is formed by the cutter 410 along the entire circumference of B, the third side surface 200C, and the fourth side surface 200D. At this time, the groove 400 may be formed by moving the cutter 410 around the cathode ray tube 200, or the groove 400 may be formed over the entire circumference by the cutter 410 by rotating the cathode ray tube 200. You may. Alternatively, the groove 400 may, of course, be partially formed instead of being formed over the entire circumference of the cathode ray tube 200.

Next, in the heating step ST2 of FIG.
As shown in FIGS. 1 and 6, the control unit 100
0, the heating power supply 20 is connected to the upper first heating members 22A to 22D and the lower second heating member 2D.
Power is supplied to 4A to 24D. In this case, the current value applied to the first heating members 22A to 22D and the second heating members 24A to 24D is, for example, 15A, and the voltage is 50V.
It is.

When electricity is supplied to the first heating members 22A to 22D and the second heating members 24A to 24D in this manner, as shown in FIG. Thermal strain can be given.
That is, the first of the cathode ray tubes 200 that are in contact with the first heating members 22A to 22D and the second heating members 24A to 24D.
Heat is applied to the side surface portion 200A to the fourth side surface portion 200D so as to expand the glass, and a reaction occurs in each of the first side surface portion 200A to the fourth side surface portion 200D. FIG. 7 shows an example of a stress distribution due to thermal strain generated in the first side surface 200A. A tensile force T1 or T2 is generated from the upper and lower sides of the first heating member 22A and the second heating member 24A in the scratch 400 located at a position corresponding to the cooling pipe 70. Glass is generally vulnerable to tensile forces. Moreover, the first heating members 22A to 22D and the second heating member 2
Using the 4A to 24D, the first side portion 200A to the fourth side portion 200D are heated so as to be sandwiched between the upper and lower flaws 400.
This is higher than using one heater wire.

Next, the process proceeds to a cooling step ST3 in FIG. 10, and when the control unit 100 in FIG. 1 gives a drive command to the cooling medium supply unit 30, the cooling medium supply unit 30
To 73 are supplied with a cooling medium such as water or air. As a result, for example, as shown in FIG.
0 through which the cooling medium passes, the tensile forces T1, T
2 can be cooled, thereby further accelerating the operation of generating the tensile forces T1 and T2. As a result, the scratches 400 cannot be tolerated, and cracks 600 are formed in the first side face portion 200A to the fourth side face portion 200D along the scratches as shown in FIG. As a result, as shown in FIG.
Can be surely divided along the scratch 400 in a short time into the panel portion 210 and the funnel portion 220.

By using the first heating member and the second heating member as in the embodiment of the present invention, the division time can be reduced by about half as compared with the conventional division using one heater wire. The cathode ray tube 200 can be divided into the panel unit 210 and the funnel unit 220 in, for example, less than one minute. As described above, the division time between the panel section and the funnel section can be reduced to about half as compared with the related art, and the recycle processing time can be greatly reduced. When the dividing step ST4 shown in FIG. 10 is completed in this way, the panel section crushing step ST4
In 5, the panel section 210 is finely crushed in a post-process,
In the funnel crushing step ST6, the funnel 220 is finely crushed.

FIG. 11 shows another embodiment of the present invention. However, the embodiment of FIG. 11 differs from the embodiment of FIG. 1 in that two cooling pipes of the cooling unit 16 are used instead of four. The cooling pipes 70 and 72 are connected in series to the cooling medium supply unit 30. As described above, the two cooling pipes 70 and 72 are connected to the widest first side surface 20.
The first heating member and the second heating member are arranged in parallel with each other along 0A and the third side surface portion 200C with a space between them. The widest first side 200A and third side 200
Even if the cooling pipes 70 and 72 are arranged in C, the cathode ray tube 200 can be surely divided into the panel part 210 and the funnel part 220, and the division time can be set at, for example, about one minute or more.

According to the dividing method of the present invention, a wound is made entirely or partially around the cathode ray tube, and two heating wires are laid in parallel above and below the wound. By applying a current to the heating wire and heating from above and below, and cooling the wound after heating, stress is forcibly applied to the wound. The stressed flaws begin to crack in a short period of time, so that the glass of the cathode ray tube can be accurately divided. For this reason, the division time between the panel section and the funnel section can be greatly reduced. 2
By using the heating wire, more stress can be applied to the wound. By cooling the entire wound with a cooling medium, more stress is applied to the wound. Cracks can be caused to run on these stressed portions (between wires), and accurate division can be performed.

[0036]

As described above, according to the present invention,
The cathode ray tube can be reliably divided in a short time.

[Brief description of the drawings]

FIG. 1 is a perspective 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 scratch on the cathode ray tube of FIG. 1;

FIG. 3 is an exemplary perspective view showing an example of a television receiver having a cathode ray tube;

FIG. 4 is an exemplary perspective view of the television receiver shown in FIG. 3 as seen from the rear side;

FIG. 5 is an exploded view of the television receiver in FIG. 3;

FIG. 6 is a perspective view showing a heating unit and a cathode ray tube of the apparatus for dividing a cathode ray tube according to the present invention.

FIG. 7 shows a first heating member and a second heating member on a side surface of a cathode ray tube.
The figure which shows the example of arrangement | positioning of a heating member and a cooling pipe, and shows the generation | occurrence | production state of the tensile force.

FIG. 8 is a diagram showing an example in which a crack has occurred in a cathode ray tube.

FIG. 9 is a perspective view showing a state where the cathode ray tube is divided into a panel portion and a funnel portion.

FIG. 10 is a flowchart showing a method of dividing a cathode ray tube according to the present invention.

FIG. 11 is a perspective view showing another embodiment of the cathode ray tube of the present invention.

[Explanation of symbols]

10: Cathode ray tube splitting device, 12: Support part, 1
4 heating unit, 16 cooling unit, 20 heating power supply, 22A to 22D first heating member, 24A to 2
4D: second heating member, 30: cooling medium supply unit,
70-73: cooling pipe (cooling medium guide), 200
..Cathode tubes, 210 panel parts, 220 funnel parts

Claims (12)

[Claims] 1. A cathode ray tube splitting device for splitting a panel portion and a funnel portion of a cathode ray tube, comprising: a portion near the groove of the cathode ray tube having a groove formed for dividing the panel portion and the funnel portion. A heating unit for applying thermal strain to a portion, the heating unit having a first heating member and a second heating member disposed with the groove interposed therebetween, and a portion near the groove heated by the heating unit And a cooling unit for cooling the cathode ray tube. 2. The cooling unit is arranged corresponding to the groove, and the cooling unit includes a cooling medium supply unit and a cooling medium for guiding a cooling medium from the cooling medium supply unit to a vicinity of the groove. The splitting device for a cathode ray tube according to claim 1, further comprising a medium guide. 3. The cathode ray tube splitting device according to claim 2, wherein the cooling medium is air or water. 4. The heating unit has a power supply, and the first heating member and the second heating member of the heating unit that generate heat by passing an electric current supplied from the power supply are nichrome wires. 2. The splitting device for a cathode ray tube according to claim 1. 5. A set of the first heating member and the second heating member of the heating unit, each corresponding to the groove formed on two or four opposite sides of the cathode ray tube. 2. The splitting device for a cathode ray tube according to claim 1, wherein the splitting device is arranged. 6. The cathode ray tube splitting device according to claim 1, wherein the cooling unit is disposed between the first heating member and the second heating member of the heating unit. 7. A method of dividing a cathode ray tube for dividing a panel portion and a funnel portion of a cathode ray tube, comprising: forming a groove for dividing the panel portion and the funnel portion in the vicinity of the groove of the cathode ray tube. A heating step of arranging a heating unit with respect to the portion, and heating a portion near the groove by a first heating member and a second heating member of the heating unit arranged with the groove of the heating unit interposed therebetween; A cooling step of cooling a portion near the groove heated by the heating step with a cooling unit. 8. The method according to claim 7, wherein the cooling medium is guided near the groove by passing through the cooling medium guide. 9. The method according to claim 8, wherein the cooling medium is air or water. 10. The cathode ray tube according to claim 7, wherein the first heating member and the second heating member of the heating unit that generate heat by passing a current supplied from a power supply of the heating unit are nichrome wires. How to split. 11. The set of the first heating member and the second heating member of the heating unit may correspond to the grooves formed on two or four opposite sides of the cathode ray tube, respectively. The method for dividing a cathode ray tube according to claim 7, wherein the cathode ray tube is arranged. 12. The method according to claim 7, wherein the cooling unit is disposed between the first heating member and the second heating member.