JP3563896B2 - Cathode ray tube splitting device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
INDUSTRIAL APPLICABILITY The present invention relates to a cathode ray tube splitting apparatus optimally used for disassembling and processing a cathode ray tube (CRT). In place It is about.
[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) of used television sets has been advanced in various fields. Further, there is an urgent need to quickly and efficiently recycle an increasing number of discarded television sets.
A cathode ray tube is used as a television set or other image receiver, and is a glass structure having a panel portion (also called a face portion) and a funnel portion (also called a panel skirt portion). The panel section is made of almost transparent glass material to improve light transmittance, and the funnel section is made of lead to prevent leakage of X-rays generated by collision between a high acceleration voltage electron beam and a substance. It is made of glass material mixed with. The funnel portion and the panel portion are formed into a tubular shape by welding with frit glass (solder glass).
[0003]
An electron gun, a deflection yoke, and the like are attached to the back of the cathode ray tube in appearance. A shadow mask (or aperture grill) is provided inside the cathode ray tube, and phosphors of three colors of red, green and blue are regularly applied to a phosphor screen on an inner surface side of the panel portion. An explosion-proof band is firmly fastened and attached to a portion where the panel portion and the funnel portion are welded through an explosion-proof (explosion-proof or implosion-prevention) tape.
Since the panel portion and the funnel portion of the cathode ray tube, particularly the panel portion, are made of a glass material, it is relatively easy to reuse. For this reason, when the cathode ray tube is reused, there is an attempt to separate the panel portion from the cathode ray tube and reuse it.
For example, by scratching the four corners (corner portions) of the side surface of the cathode ray tube and heating those portions, thermal stress is generated, cracks (cracks) are generated, and at the same time, a panel is formed using mechanical means. There has been proposed a method of separating and dividing a part and a funnel part.
[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 time for thermal stress to be generated even if the tube is heated. Further, if the scratches are not made accurately, there is a problem that cracks do not normally occur and division failure occurs.
In addition, cathode ray tubes vary in size according to the standard, and even with the same inch size, there is variation among manufacturers, and for a cathode ray tube having such size variation, There is also a problem that the structure of the processing apparatus becomes complicated when trying to make a scratch accurately.
Accordingly, the present invention has been made to solve the above-mentioned problem, and a cathode ray tube splitting device capable of surely splitting various types of cathode ray tubes of different sizes in a short time. Place It is intended to provide.
[0005]
[Means for Solving the Problems]
The object of the present invention is to provide a cathode ray tube splitting device for splitting a cathode ray tube into a panel portion and a funnel portion in the present invention, wherein the support means supports the cathode ray tube, and the cathode ray tube is positioned on the support means. For Cathode ray tube Pressing means having a moving part for pressing the four sides, comprising four pressing means for determining the size of the cathode ray tube based on the amount of movement of the moving part when positioning the cathode ray tube. Positioning and dimension determining means, groove forming means for forming a groove for division in accordance with the dimensions of the cathode ray tube around the side surface of the cathode ray tube supported by the support means, A control device for controlling the relative rotation of the groove forming means and the cathode ray tube, Heating means for heating the periphery of the side surface including the groove for dividing the cathode ray tube to apply thermal stress to the periphery of the side surface of the cathode ray tube; This is achieved by a splitting device for a cathode ray tube comprising:
According to the present invention, the operation of the cathode ray tube and the groove forming means is controlled accurately and flexibly with respect to the cathode ray tube supported by the support means, and an optimal operation form is executed according to the size (kind) of the cathode ray tube. By doing so, the success rate of division in the step of dividing the cathode ray tube into the panel portion and the funnel portion can be increased, and the yield can be improved.
[0006]
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.
[0007]
FIG. 1 is an overall 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 cathode ray tube splitting apparatus includes a support unit 10, a groove forming unit 50, a heating unit 70, a positioning and dimension determining unit 90, a control unit (control device) 100, and the like.
The support unit 10 includes a vertical movement mechanism unit 11, a rotation unit 12, a suction unit 13, a support plate 24, and the like.
[0008]
The vertical movement mechanism 11 includes a fixed plate 16 fixed to the fixed portion 15, a support plate 17, and guide bars 18. The fixed plate 16 is fixed to the fixed portion 15, and the bearings 16a, 16a of the fixed plate 16 can guide the guide bars 18, 18 to be vertically movable in the arrow Z direction.
The support plate 17 is fixed to upper ends of the guide bars 18. The support plate 17 supports a motor 19 of a rotating unit 12 with a built-in rotor.
The operating means 20 can move the support plate 17 up and down in the arrow Z direction of the vertical shaft 21, and the upper end of the vertical shaft 21 is fixed to the position of the center 17 of the support plate 17. Therefore, the support plate 17 can be moved up and down and positioned in the direction of arrow Z by the control unit 100 operating the operation means 20.
[0009]
The rotating means 12 is mounted on a support plate 17, and the rotating means 12 can rotate the cathode ray tube 200 together with the support plate 24 in the direction of arrow R. The rotating means 12 can change the rotation speed of the cathode ray tube 200 according to a command from the control unit 100.
The rotating means 12 is a motor in which a rotor 12a is disposed inside a stator 12b, and the rotor 12a is connected to a shaft 22. The magnetic flux generated by the coil of the stator 12b of the motor 19 interacts, and the rotor 12a rotates together with the shaft 22.
A vacuum suction pad 23 preferably made of an elastic member is attached to the shaft 22. The vacuum suction pad 23 is a member that supports the surface of the panel unit 210 of the cathode ray tube 200 by the suction action of the suction unit 24a, and is preferably made of a slippery plastic or metal (for example, iron). To prevent scratching.
[0010]
Next, the positioning and dimension determining means 90 will be described.
The positioning means 90 of FIG. 2 includes four pads 91, 92, 93, 94. These pads 91, 92, 93, 94 are made of iron, for example, and can press the four sides 220, 221, 222, 223 around the four sides of the cathode ray tube 200, respectively. That is, the pads 91, 92, 93, 94 can be separated from, for example, four sides 220, 221, 222, 223 by the cylinders 95, 96, 97, 98.
For example, when the cylinders 95 and 97 shown in FIG. 2 are operated to push the pads 91 and 93 toward the cathode ray tube 200, the pads 91 and 93 push the periphery 220 and 222 of the longer side of the four sides of the cathode ray tube 200. Thus, the cathode ray tube 200 is positioned on the support means 10 in the direction of the arrow X.
Similarly, when the cylinders 96 and 98 are operated, the pads 92 and 94 are pressed against the peripheral sides 221 and 223 of the short sides of the cathode ray tube 200, so that the cathode ray tube 200 is moved on the support means 10 along the arrow Y direction. It will be positioned.
In this manner, the cathode ray tube 200 is centered on the support means 10, and the vacuum suction pad 23 of the suction unit 13 in FIG. 1 accurately positions the center of the panel unit 210 of the cathode ray tube 200. Can be aspirated.
[0011]
Next, detection of the size (inch size) of the cathode ray tube 200 will be described.
As shown in FIG. 12, the cylinders 95, 96, 97, 98 of the positioning and dimension determining means 90 incorporate moving amount detecting means 95c, 96c, 97c, 98c for the cylinder rods 95a, 96a, 97a, 98a. The detecting means 95c, 96c, 97c, 98c can generate a pulse signal PS according to the movement of the cylinder rods 95a, 96a, 97a, 98a.
As the movement amount detecting means 95c, 96c, 97c, 98c, a method as shown in FIG. These movement amount detection means 95c to 98c are composed of cylinder rods 95a to 98a and a magnetic scale 789. The magnetic scale 789 is made of a magnetic material, and has a magnetic head 788 that reads the scale of the scale. The electric signal read by the magnetic head 788 is output as a pulse signal PS through the amplifier.
These pulse signals PS are counted by the pulse signal counting means (counter) 500 and transmitted to the CPU of the control unit 100. The dimensions of the cathode ray tube 200 are usually expressed in inches, and indicate the length of a diagonal line of the cathode ray tube 200. Therefore, since the aspect ratio of the conventional television set is 3: 4, the vertical and horizontal dimensions of the cathode ray tube 200 are calculated in advance from the inch size, and the cathode ray tube 200 is stored in the memory of the CPU of the control unit 100. Store as dimension data for each inch.
Then, simultaneously with the operation of the positioning and dimension determination means 90, the vertical and horizontal dimensions of the cathode ray tube 200 are calculated from the movement amounts of the cylinder rods 95c, 96c, 97c, 98c of the cylinders 95, 96, 97, 98, and the control unit 100 The dimension of the cathode ray tube 200 is detected with reference to the dimension data for each inch stored in the memory of the CPU.
At this time, even if the inch size is the same, the dimensions of the cathode ray tube 200 may be different depending on the maker. Therefore, when determining the inch size by referring to the size data, the CPU determines with a tolerance.
[0012]
Next, the heating means 70 will be described.
The heating means 70 includes four heater wires 71, 72, 73, 74, a heating power supply 75, and the like, as shown in FIGS.
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 are formed by twisting a plurality of nichrome wires, for example, and each heater wire 71 has an insulating coating. By doing so, it is possible to prevent the heater wire from being short-circuited and at the same time to prevent the heater wire from being cast. The heater wire is repeatedly heated and spontaneously dissipated, so that the mold is easily formed. Once the mold is formed, it is easily cut due to stress. Preventing the type of the heater can prevent the heater wire from floating on the side surface of the cathode ray tube 200, improve the thermal efficiency, and shorten the division time of the cathode ray tube 200. The heater wire 71 corresponds to the short side periphery 221 of the long side periphery 200 of the cathode ray tube 200, the heater line 73 corresponds to the short side periphery 222 of the cathode ray tube 200, and the heater line 74 corresponds to the cathode line. It corresponds to the periphery 223 of the short side of the tube 200. That is, these four heater wires 71 to 74 are arranged in a substantially rectangular shape when viewed from the plane direction.
[0013]
Next, the groove forming means 50 will be described.
The groove forming means 50 are arranged at two diagonal positions of the cathode ray tube 200 as shown in FIG. The cathode ray tube 200 rotates in the counterclockwise rotation direction T, and the rotary cutter 55 rotates in the arrow direction C1.
The groove forming means 50 includes a motor 51, a motor 52, arms 53 and 54, a rotary cutter 55 and the like as shown in FIG. This motor 51 is attached to a fixed part 56 as shown in FIG.
The output shaft of the motor 51 in FIG. 4 is attached to one end of the arm 53. The other end of the arm 53 is rotatably connected to one end of another arm 54. A motor 52 is provided at the other end of the arm 54, and an output shaft of the motor 52 is connected to a rotary cutter 55. When the motor 52 is operated, the rotary cutter 55 rotates continuously in the C1 direction.
Note that a spring 57 is attached between the arm 53 and the arm 54. Thus, when the motor 51 rotates, the arms 53 and 54 rotate in the direction of arrow C3, and when the motor 52 rotates, the rotary cutter 55 rotates. In addition, when the rotary cutter 55 is in contact with the long side surfaces 220 and 222 or the short side surfaces 221 and 223 of the cathode ray tube 200 as shown in FIG. Is adjusted, the arm 54 rotates with respect to the arm 53 in the direction of the arrow C2.
The control unit 100 controls the suction unit 24a, the motor 19, the operation unit 20, the heating power supply 75, the motors 51 and 52 in FIG.
[0014]
Next, a method of dividing a cathode ray tube using the above-described cathode ray tube dividing device will be described.
First, in response to a command from the control unit 100 in FIG. 1, for example, the transport unit 310 of the suction vertical movement unit 300a transports the cathode ray tube 200 to the cathode ray tube splitting device as shown in FIG.
The suction vertical movement means 300a and the transport unit 310 place the cathode ray tube 200 with the cathode ray tube 200 substantially positioned on the support pins 14 of the support means 10, and stop the suction operation of the suction vertical movement means 300a. Then, the suction vertical movement means 300a and the transport unit 310 are separated from the cathode ray tube 200.
The transported cathode ray tube 200 is in a state where an electron gun, a deflection yoke, an explosion-proof band, and the like have been removed in advance.
Therefore, in the cathode ray tube 200, the panel section 210 is supported by the support pins 14 and the vacuum suction pads 23 of the suction section 13 with the funnel section 211 facing upward.
[0015]
Next, when the rotor 12a of the motor 19 in FIG. 1 rotates at a low speed in accordance with a command from the control unit 100, the support means 10 and the cathode ray tube 200 mounted thereon rotate at a low speed in the direction of arrow R. At this time, the rods 91, 92, 93 and 94 for centering in FIG. 2 are operated by operating the cylinders 95, 96, 97 and 98, and the side circumferences 220 and 222 on the long side or the side circumference 221 on the short side in FIG. , 223 intermittently. By repeating this operation, the cathode ray tube 200 is centered with respect to the support means 10, that is, centering is performed. At the same time as the centering operation, the size of the cathode ray tube 200 is detected.
From this centering operation, the rotation center of the cathode ray tube 200 and the rotation center of the support plate 24 coincide. At this time, the suction means 24a of the vacuum suction pad 23 is operated, and the vacuum suction pad 23 vacuum-adsorbs the surface of the cathode ray tube 200 to securely fix it.
[0016]
Next, in response to a command from the control unit 100, the operating means 20 of the vertical movement mechanism unit 11 in FIG. Thereby, the cathode ray tube 200 rises and stops at the first position PL1, which is the groove forming position. The first position PL1 is a position for preventing the pins 231 from being included in the panel after the division, is measured in a process before the main dividing process, and is transmitted to and stored in the CPU of the control unit 100. ing.
The rotary cutter 55 of the groove forming means 50 in FIGS. 1 and 3 moves up to a position corresponding to the dividing line indicated by the arrow LL of the cathode ray tube 200 in FIG. The position of the LL line is a position closer to the surface side of the panel section 210 than the shadow mask 230. By dividing the cathode ray tube 200 by the LL line, the cathode ray tube 200 can be completely divided into a shadow mask 230 and a funnel part 211 including the pins 231 and a panel part 210 not including the shadow mask and the pins. it can.
[0017]
In the cathode ray tube dividing step described in the present invention, as described above, the reason why the cathode ray tube 200 is completely divided into the shadow mask 230 and the funnel part 211 including the pins 231 and the panel part 210 not including the shadow mask and the pins. It depends on the process after division. The separated funnel includes the shadow mask 230 and the pin 231. The worker manually separates the shadow mask 230 and the pins 231. Thereafter, only the glass is crushed, and the paint applied to the inner surface of the funnel is used. Wash to remove. After the cleaning, the glass and the metal pieces are mixed, so that a step of separating the glass and the metal is required. On the other hand, in the panel section 210, a glass material is obtained simply by removing the fluorescent paint on the back side of the panel section. Thus, the division form of the cathode ray tube 200 is determined.
[0018]
Here, in order to surely divide the cathode ray tube 200, the control unit 100 uses the rotary cutter 55 shown in FIG. 3 and the rotating means 12 shown in FIG. 1 to form a groove 300 as shown in FIGS. A control method for performing this will be described.
FIG. 9 is a schematic diagram showing a rotation positioning angle of the cathode ray tube 200 by the rotating means 12 and a cutting angle of the rotary cutter 55 when the first groove is formed.
In FIG. 9, θ1B indicates the rotation center position of the cathode ray tube 200, and θ1C indicates the rotation center position of the rotary cutter arm. Θ1B is the rotation angle of the entrance of the cathode ray tube, θ1B1 is the rotation angle of the exit of the cathode ray tube, θ1C is the rotation angle of the arm that supports the cutter, and this is the entrance angle of the cutter. The rotation angle is represented by rotating the arm 53.
Here, the entrance angle indicates a cutting angle of the rotary cutter 55 with respect to the cathode ray tube 200 in the groove forming operation. The exit angle refers to the rotation angle at the end of the grooving operation, that is, when the rotary cutter 55 separates from the cathode ray tube 200. During the formation of the groove, both the cathode ray tube 200 and the rotary cutter 55 are rotated at a constant speed from the entrance angle to the exit angle. Further, during the groove forming operation, the rotation speed of the blade of the rotary cutter 55 itself is constant.
[0019]
In the embodiment of the present invention, since the grooves of the cathode ray tube 200 are formed at the same time at two corners located on the opposite corners of the four corners, when the groove formation at the first two corners is completed, the rotary cutter is rotated. 55 is returned to the origin once. This is to avoid mechanical interference between the cathode ray tube 200 and the rotary cutter 55 when the cathode ray tube 200 is rotated to form grooves in the remaining two corner portions of the cathode ray tube 200.
When the positioning rotation of the cathode ray tube 200 at the time of the second groove formation is completed, the control unit 100 issues a command to move the rotary cutter 55 to the entrance angle θ2B at a high speed. This is to shorten the process time as much as possible, and not only at the start of the second groove formation but also at the time of the rotation positioning of the cathode ray tube 200 by the rotating means 12 and at the time of the first groove formation. Similarly, high-speed positioning control is performed in rotational positioning other than during the groove formation.
[0020]
The entrance angles θ1B, θ2B, θ1C, θ2C and the exit angles θ1B1, θ2B1, θ1C1, θ2C1 are called from the memory by the CPU of the control unit 100 when the above-described inch size of the cathode ray tube 200 is determined. As for the entrance angles θ1B, θ2B, θ1C, θ2C and the exit angles θ1B1, θ2B1, θ1C1, θ2C1, data corresponding to only inch size is stored in the control unit 100. It is also possible to store the data in a fragmented manner, such as by manufacturer-specific inch size or by lot number.
[0021]
FIG. 10 is a flowchart showing an example of an operation sequence in forming and dividing grooves between the rotary cutter 55 and the cathode ray tube 200 using the present invention.
(Step 1) First, the cathode ray tube 200 of FIG. 1 is loaded into the vertical movement mechanism unit 11 and mounted on the support means 10.
(Step 2) Subsequently, the cathode ray tube 200 is centered by the positioning and dimensioning means 90.
(Step 3) At the same time, the control unit 100 measures the number of pulses from the movement amount detecting means 95c, 96c, 97c, 98c of the cylinder rods 95a, 96a, 97a, 98a in FIG. calculate.
[0022]
(Step 4) The control unit 100 of FIG. 1 controls the vertical movement mechanism unit 11 to raise the cathode ray tube 200 to a position where the LL line and the blade part of the rotary cutter 55 coincide.
(Step 5) The rotation of the rotary cutter 55 is started.
(Step 6) As shown in FIG. 9, the arm of the rotary cutter 55 is rotated and positioned at a high speed up to the corner angle θ1C before the initial groove formation.
(Step 7) Next, as shown in FIG. 9, the cathode ray tube 200 is rotated and positioned at a high speed up to the corner angle θ1B before the initial groove formation.
The sequence of steps 6 and 7 is executed in order to prevent the blade of the rotary cutter 55 from being damaged by collision with the cathode ray tube 200.
[0023]
(Step 8) When the high-speed rotation positioning is performed, the rotary cutter 55 and the cathode ray tube 200 vibrate due to the moment of inertia. Since the vibration causes damage due to the collision between the blade of the rotary cutter 55 and the cathode ray tube 200, the monitoring of the timer waits until the vibration is attenuated.
(Step 9) Next, as shown in FIG. 9, the rotary cutter 55 and the cathode ray tube 200 are rotationally positioned to the entrance angles θ1C and θ1B at a low speed. With this operation, the groove forming process starts.
(Step 10) Then, at a constant speed, the rotary cutter 55 and the cathode ray tube 200 are rotationally positioned to the outlet angles θ1C1 and θ1B1. By this positioning operation, the groove forming processing for the two corner portions is completed at the same time.
(Step 11) Next, in order to rotate the cathode ray tube 200, the rotary cutter 55 is once moved to the origin position at a high speed and retracted.
[0024]
(Step 12) The arm of the rotary cutter 55 is rotated and positioned at a high speed up to the corner angle θ2C before forming the second groove.
(Step 13) Next, the cathode ray tube 200 is rotated and positioned at a high speed up to a corner portion entrance angle θ2B before forming the second groove.
(Step 14) As in Step 8, the system waits until the vibration is attenuated by monitoring the timer.
(Step 15) Next, as shown in FIG. 9, the rotary cutter 55 and the cathode ray tube 200 are rotationally positioned to the entrance angles θ2C and θ2B at a low speed. With this operation, the groove forming process starts.
(Step 16) Then, as shown in FIG. 9, the rotary cutter 55 and the cathode ray tube 200 are rotationally positioned to the outlet angles θ2C1 and θ2B1 at a constant speed. By this positioning operation, the groove formation processing for the last two corner portions is completed at the same time.
[0025]
(Step 17) Next, in order to rotate and discharge the cathode ray tube 200, the rotary cutter 55 is moved at a high speed to the origin position and retracted.
(Step 18) The blade of the rotary cutter 55 is stopped.
(Step 19) The cathode ray tube 200 is heated and divided by the heating means 70 of FIG.
(Step 20) The cathode ray tube 200 is discharged from the support means 10 of FIG.
(Step 21) If there is a cathode ray tube 200 for the next division, the process starts again from Step 1 of the above-described sequence.
[0026]
In order to divide the cathode ray tube 200 as described above, the rotary cutter 55 first makes grooves at the four corners of the cathode ray tube 200 on the line LL in FIG. Specifically, as shown in FIG. 3, each rotary cutter 55 is urged around the side surface of the cathode ray tube 200 by a spring 57 while rotating by the operation of the motor 52 in the arrow C1 direction. Therefore, as described above, each rotary cutter 55 can accurately hit four corners on the LL line of the cathode ray tube 200, and by rotating the rotor 12a of the motor 19 of the rotating means 12, as shown in FIG. As shown in FIG. 6, division grooves 300 can be formed at the four corners along the line LL of FIG. 1 in the side circumferences 220 to 223 of the cathode ray tube 200.
[0027]
As shown in FIG. 7, the width D of the groove 300 is formed to be larger than the diameter d of the heater wires 71 to 74. By doing so, the heater wires 71 to 74 can be reliably inserted into the groove 300. Moreover, the grooves 300 are also formed in the four corners (four corners) 250 of the cathode ray tube 200 in the same manner. FIG. 8 shows an example of this corner section 250.
When the grooves 300 are formed in the cathode ray tube 200 by the rotary cutter 55, so-called dry cutting is performed without using grinding oil.
In this manner, the rotary cutter 55 abuts the periphery of the long side and the short side of the cathode ray tube 200 that has started rotating at a predetermined pressure by the force of the spring 57, and rotates the cathode ray tube 200 at least. By doing so, the grooves 300 can be reliably provided at the four corners of the cathode ray tube 200.
[0028]
Then, as shown in FIG. 1, the rotary cutter 55 of the groove forming means 50 returns to the origin position, and the rotation of the cathode ray tube 200 also stops.
The operation means 20 of the vertical movement mechanism unit 11 in FIG. 1 is operated, and the cathode ray tube 200 is positioned down from the first position PL1 to the second position PL2.
In this state, the cathode ray tube 200 is oriented as shown in FIG. That is, the long sides 220 and 222 of the long sides face the heater wires 71 and 73, and the short sides 221 and 223 of the short sides face the heater wires 72 and 74.
Here, the heater wires 71, 72, 73, 74 of FIG. 2 approach the corresponding long side periphery 220, 222 or the short side periphery 221, 223, respectively, by the operation of the heater moving means 400, Each of the long sides and the short sides are stuck into the groove around the side and stop.
[0029]
Next, the heating power supply 75 operates to apply a predetermined current to each of the heater wires 71 to 74, and the heater wires 71 to 74 generate heat, so that a temperature difference occurs between the inside and the outside of the cathode ray tube 200. Then, an internal stress is generated in the glass part of the cathode ray tube 200. As a result, cracks start to form at the four corners 250 (see FIG. 6) of the cathode ray tube 200 with a large amount of distortion, and the grooves 220 and 222 around the long sides of the cathode ray tube 200 and the grooves 221 and 223 around the short sides. Cracks occur along 300. Thereby, the cathode ray tube 200 is divided into the panel section 210 and the funnel section 211 along the line LL (partition line) in FIG.
In the embodiment of the present invention, grooves are formed at the four corners of the cathode ray tube, and all the heater wires 71, 72, 73, 74 are fitted in all of the portions defining the grooves 300, whereby By generating thermal stress near the portion where the groove is defined at once, the cathode ray tube 200 can be divided into the panel portion 210 and the funnel portion 211 reliably in a short time.
[0030]
In the embodiment of the present invention, the cathode ray tube as a work and the rotary cutter arm as a groove forming means are positioned by variably controlling the rotation angle according to the inch size of the cathode ray tube, and a groove is formed in a corner portion of the cathode ray tube. Form.
By the way, the present invention is not limited to the above embodiment.
For example, in the above-described embodiment, grooves are formed over a part of the periphery of the short side including the corners 250 at the four corners and a part of the periphery of the side of the long side, and the heater wires are fitted into these grooves to be divided. However, the present invention is not limited to this. It is also possible to form a groove around the entire periphery of the short side surface and the long side surface, and to divide the heater line into the groove.
The groove forming means uses a rotating grindstone. As the rotating grindstone, for example, an electroformed type or an electrodeposition type artificial diamond grindstone can be used.
[0031]
The groove is not limited to this, and a groove can be formed around the side surface of the cathode ray tube by using another kind of cutter grindstone. In the method of arranging the cutter grindstones, as shown in FIG. 3, one unit may be provided on each diagonal line of the cathode ray tube to form a groove.
Further, in the embodiment of FIG. 3, two groove forming means 50, 50 are arranged to form a groove at once with the cathode ray tube sandwiched from both sides, but the groove forming means is not limited to this. It is also possible to arrange one or three or more. The cathode ray tube is not limited to a cathode ray tube for a television set, but can be applied to the present invention also in the division of a wide type television set, a cathode ray tube for a computer display monitor or a measuring instrument, and the like.
In the cathode ray tube splitting device of the present invention, the cathode ray tube as a work and the rotary cutter arm as a groove forming means are positioned by variably controlling the rotation angle in accordance with the inch size of the cathode ray tube, and positioning the cathode ray tube. A groove can be formed in the corner.
[0032]
In the embodiment of the present invention, the cathode ray tube is formed at the four corners in comparison with the conventional technique in which the four corners of the cathode ray tube are simultaneously formed by four cutters and the cutter is rotated at a constant speed to form a groove. The groove can be formed by controlling the rotation speed and rotation angle of the tube and the arm. Since grooves can be formed in the cathode ray tube without generating unnecessary cracks in the cathode ray tube, the cathode ray tube can be divided into a panel portion and a funnel portion in a short time, and the reliability of division can be improved.
Also, in comparison with a method in which the cathode ray tube is fixedly supported and grooves are formed by moving the four cutters simultaneously only on the diagonal line of the cathode ray tube, in the present invention, only two groove forming means 50, 50 are provided. Therefore, the device structure can be reduced in size and simplified.
[0033]
【The invention's effect】
As described above, according to the present invention, various types of cathode ray tubes having different dimensions can be reliably divided 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 plan view showing a state in which a groove is formed around the side surface of the cathode ray tube.
FIG. 4 is a perspective view showing an example of a groove forming means for forming a groove around the side surface of the cathode ray tube.
FIG. 5 is a diagram in which a rotary cutter of a groove forming unit attempts to form a groove around a side surface of a cathode ray tube.
FIG. 6 is a perspective view showing an example of a cathode ray tube in which a groove is formed around a side surface.
FIG. 7 is a sectional view showing a state where a heater wire is fitted into a groove of the cathode ray tube.
FIG. 8 is a sectional view showing a corner portion of the cathode ray tube.
FIG. 9 is a plan view showing a rotation angle of a corner portion of a cathode ray tube and an arm of a rotary cutter in forming a first groove.
FIG. 10 is a flowchart showing a part of an operation sequence of the cathode ray tube and the rotary cutter arm in forming a groove.
FIG. 11 is a flowchart showing the rest of the operation sequence of the cathode ray tube and the rotating cutter arm in forming the groove in FIG. 10;
FIG. 12 is a diagram illustrating an example of a positioning and dimension determining unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Support means, 11 ... Vertical movement mechanism part, 12 ... Rotation means, 13 ... Suction part, 50 ... Groove formation means, 70 ... Heating means, 71-74 ...・ Heater wire, 90 ・ ・ ・ Positioning and dimension determining means, 100 ・ ・ ・ Control unit, 200 ・ ・ ・ Cathode tube, 210 ・ ・ ・ Panel unit, 211 ・ ・ ・ Funnel unit, 220-223 ・ ・ ・ Surrounding of side surface , OB: rotation center position of cathode ray tube, OC: rotation center position of rotary cutter arm, θ1B: entrance rotation angle of cathode ray tube at the time of initial groove formation, θ1B1: cathode ray at the time of initial groove formation Pipe exit rotation angle, θ1C: Entrance rotation angle of cutter at the time of initial groove formation, θ1C1: Cutter exit rotation angle at the time of initial groove formation

Claims (8)

A cathode ray tube splitting device for splitting a cathode ray tube into a panel portion and a funnel portion,
Support means for supporting said cathode ray tube,
For positioning the cathode ray tube on said support means, a pressing means having a moving portion for pressing the four sides of the cathode ray tube, on the basis of the movement amount of the moving part when positioning the cathode ray tube cathode lines Positioning and sizing means comprising four pressing means for sizing the tube ;
Around the sides of the cathode ray tube supported by said supporting means, and the groove forming means for forming a groove for dividing that matches the size of the cathode ray tube based on the size of the cathode ray tube,
A control device for controlling the relative rotation between the cathode ray tube and the groove forming means,
A heating device for heating the periphery of the side surface including the groove for dividing the cathode ray tube to apply thermal stress to the periphery of the side surface of the cathode ray tube. Said support means is a cathode ray tube of the dividing apparatus according to claim 1, further comprising a rotation means for rotating positioned in any direction, speed of the cathode ray tube. 2. The cathode ray tube splitting device according to claim 1, wherein the groove forming means includes a rotating means for rotating and positioning the rotary grindstone at an arbitrary direction and speed. Said heating means comprises a heater wire in which the are arranged in a portion forming the groove, each heater wire of claim 1 which is arranged corresponding to the side surface around the four sides of said cathode ray tube Cathode ray tube splitting device. It said groove forming means, a cathode ray tube of the dividing apparatus according to claim 1 to form a groove at the four corners of the cathode ray tube. 2. The positioning and dimension determining means according to claim 1, wherein a pulse signal is generated in accordance with an amount of movement of a moving unit for positioning, and an inch size of the cathode ray tube is determined based on the pulse signal. Cathode ray tube splitting device. 7. The cathode ray tube splitting device according to claim 6, wherein the groove forming unit performs rotation positioning of the cathode ray tube and the rotary cutter type rotating unit according to an inch size of the cathode ray tube. 2. The cathode ray tube splitting device according to claim 1, wherein a groove width at four corners of the cathode ray tube is larger than a diameter of a heater wire of the heating unit.

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