KR100355566B1 - Bevel polishing apparatus of funnel for cathode ray tube - Google Patents

Abstract

PURPOSE: A bevel polishing apparatus of a funnel for a cathode ray tube is provided to reduce a time for chucking a funnel by chucking the funnel from a lower direction. CONSTITUTION: A rotary shaft(20) is installed in a state of erection. The rotary shaft(20) has an air absorption path(22) formed along a center of a shaft. A centering member(37) is extended along a shaft line of the rotary shaft(20). The centering member(37) is inserted into a neck portion(5) of a funnel(1). An sealing contact member(39) is contacted with an inner wall face of the funnel(1). A vacuum pump(47) is used for contacting the sealing contact member(39) with the inner wall face of the funnel(1) by sucking the air between the sealing contact member(39) and the inner wall face of the funnel(1) through the air absorption path(22) formed at the rotary shaft(20).

Description

Bevel grinding device of funnel for cathode ray tube

The present invention relates to a bevel grinding device for a cathode ray tube funnel, and more particularly, to reduce the chucking time of the cathode ray tube funnel, as well as to reduce costs, and to bevel grinding of a cathode ray tube funnel having a compact configuration. Relates to a device.

Generally, a cathode ray tube has a panel on which an image is projected, a funnel-shaped funnel coupled to the rear of the panel, and a neck coupled to the funnel with an electron gun. The panel and the funnel each have a joining cross section, and are joined to each other by pleat sealing.

Such a funnel is formed by heating a glass raw material in a glass melting furnace to make it into a predetermined molten state, and pressing a molten glass gob provided in a molding apparatus. The molded funnel is taken out from the molding apparatus and subjected to a predetermined cooling process and inspection process, and then undergoes a predetermined polishing process so that a bonding cross section for bonding with the panel can be formed. In the polishing process, the edge of the opening is polished along the axial direction to form a bonded cross section. When the bonded cross section is formed, the bevel is formed by inclining the boundary area between the bonded cross section and the funnel inner wall. The inner and outer bevels of the funnel are formed at the same time as the forming of the funnel by the molding apparatus or by the bevel grinding apparatus.

7 is a side view of a bevel grinding device of a conventional cathode ray tube funnel, Figure 8 is a plan view of the bevel grinding device of the cathode ray tube funnel of FIG. As shown in these figures, the bevel grinding device of the cathode ray tube funnel, the support frame 110, the rotating shaft 113 is installed standing up in the center region of the support frame 110, and one side of the support frame 110 It has a lifting drive shaft 115 arranged in parallel with the rotary shaft 113. At least one pair of support rollers 111 are disposed radially with respect to the rotation shaft 113 to support the funnel 101 in the upper region of the support frame 110. A centering cone 117 is coupled to an upper region of the rotary shaft 113 and extends along the longitudinal direction of the rotary shaft 113 and is inserted into the neck portion 105 of the funnel 101. The centering cone 117 has a conical shape and is brought into contact with the neck portion 105 of the funnel 101, so that the center of rotation of the funnel 101 coincides with the rotation axis 113 line. A support plate 119 is provided below the centering cone 117 to extend along the radial direction of the rotation shaft 113 and to contact the inner wall surface of the funnel 101 to support the funnel 101 from below.

The support frame 110 is provided with a rotating shaft drive motor 114 spaced apart from the rotating shaft 113 so as to drive the rotating shaft 113. The rotating shaft driving motor 114 and the rotating shaft 113 are timing belts 118. Are interconnected by

On the other hand, one side of the support frame 110 is provided with a base member 116 in parallel with the rotary shaft 113, the base member 116 is accommodated to the lifting drive shaft 115 to be elevated. In the upper end region of the elevating driving shaft 115, a pivoting arm 121 extending horizontally in the axial direction of the elevating driving shaft 115 and rotatable about the elevating driving shaft 115 is provided. The free end region of the rotating arm 121 is provided with a cylinder mechanism 123 that is linearly movable along the axial direction of the rotation shaft 113, and the cylinder mechanism 123 surrounds the neck portion 105 of the funnel 101. An upper support member 125 having a cylindrical shape to be cheap and rotatably supporting the funnel 101 is connected.

One side of the elevating drive shaft 115 is provided with a sliding drive unit 131 which is slidably movable along a rail (not shown) disposed on the support frame 110 in the axial direction of the elevating drive shaft 115. A motor support arm 133 is formed at 131 so as to extend into the rotation region of the funnel 101. In the free end region of the motor support arm 133, a bevel grinding portion 135 is formed to polish the inner edge region of the bonded end surface portion 103 of the funnel 101 to form an inner bevel.

By this configuration, when the funnel 101 is provided from the previous process, the funnel 101 has a center of rotation coinciding with the rotation shaft 113 by the centering cone 117, and the support is in contact with the inner wall surface of the funnel 101. It is supported by the plate 119. When the funnel 101 is seated on the upper side of the centering cone 117 and the support plate 119, the pivot arm 121 is rotated such that the center of the upper support member 125 is located on the extension line of the rotation shaft 113. . At this time, the cylinder mechanism 123 is extended so that the lower end of the upper support member 125 is in contact with the outer surface of the funnel 101, and the upper end is supported so that the joined end surface of the funnel 101 is in contact with the support roller 111. The member 125 is pressed.

When the funnel 101 is fixedly supported from above and below, the sliding drive part 131 moves the bevel grinding part 135 provided in the free end area of the motor support arm 133 to the joint end face 103 of the funnel 101. Let's do it. Then, when the bevel grinding portion 135 is in contact with the joint end surface 103 of the funnel 101, the rotary shaft drive motor 114 rotates the rotary shaft 113 at a predetermined rotational speed. The sliding driving unit 131 linearly moves the motor support arm 133 corresponding to the rotational angle position of the funnel 101 so that the bevel grinding unit 135 may polish the joint end surface 103. When the bevel grinding is completed, the cylinder mechanism 123 moves the upper support member 125 upwardly so that the upper support member 125 is spaced apart from the neck portion 105 of the funnel 101, and the pivot arm 121 is the funnel ( 101 is rotated by a predetermined angle about the lifting drive shaft 115 so as to be spaced apart from the centering cone 117 and the support plate 119.

By the way, in the conventional bevel grinding device, in order to chuck and release the funnel with respect to the rotating shaft, the rotating arm must not only rotate about the lifting drive shaft, but also lift and drive the upper support member, thereby loading the funnel. And unloading takes a relatively long time there is a problem that the productivity is lowered.

It is therefore an object of the present invention to provide a bevel grinding device for a funnel for cathode ray tubes that can shorten the chucking time of the funnel.

1 and 2 are a side cross-sectional view and a plan view, respectively, of a bevel grinding device of a funnel for cathode ray tubes according to the present invention;

3 is an enlarged view of the rotation axis region of FIG. 1;

4 is an enlarged view of the hermetic contact member region of FIG. 3;

5 and 6 are an enlarged plan view and an enlarged side cross-sectional view of the hermetic contact member of FIG. 4, respectively;

7 is a side view of a conventional bevel grinding device for a funnel for cathode ray tubes;

8 is a plan view of the bevel grinding device of the funnel for cathode ray tubes of FIG.

* Explanation of symbols for the main parts of the drawings

1: Funnel 5: Neck part

10: support frame 20: rotation axis

21: rotating shaft housing 22: air suction path

24: support roller 30: rotating shaft drive motor

37: centering member 39: hermetic contact member

43: support plate 47: vacuum pump

51: sliding drive part 55: grinding part

According to the present invention, in the bevel grinding device of the cathode ray tube funnel bevel grinding device having a rotational support portion for rotationally supporting the joint end surface portion of the cathode ray tube funnel, and a bevel cutting portion for cutting the edge of the junction end surface portion, is installed in an upright state. A tubular rotary shaft formed with an air suction path along the shaft center, a centering member installed to extend along the axial direction of the rotary shaft, and inserted into the neck portion of the funnel, and extending horizontally in the axial direction to an upper region of the rotary shaft; The airtight contact member in contact with the inner wall surface of the funnel and the air suction path formed in the rotating shaft draw air between the airtight contact member and the inner wall surface of the funnel to seal the airtight contact member and the inner wall surface of the panel. Bevel grinding device of the funnel for cathode ray tubes, characterized in that it comprises a vacuum pump for contacting It is.

Here, it is preferable to further include a support plate for contacting the inner wall surface of the funnel at a position spaced along the axial direction of the hermetic contact member and the rotary shaft to support the funnel.

In addition, the bevel grinding portion is effective to include at least a pair of grinding portions disposed at equal intervals on the same rotation plane.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the present invention.

1 and 2 are a side cross-sectional view and a plan view, respectively, of a bevel grinding device for a cathode ray tube funnel according to the present invention, FIG. 3 is an enlarged view of the rotary shaft region of FIG. 1, and FIG. 4 is an enlarged view of the hermetic contact member region of FIG. 5 and 6 are enlarged plan views and enlarged side cross-sectional views of the hermetic contact member of FIG. 4, respectively. As shown in these drawings, the bevel grinding device for a cathode ray tube funnel according to the present invention, the support frame 10 having a rectangular shape, and the rotating shaft 20 is installed standing up to pass through the central region of the support frame 10. And a rotating shaft drive motor 30 installed at one side of the rotating shaft 20 to drive the rotating shaft 20.

The support frame 10 includes a base part 11 installed to be in contact with the installation bottom surface, an upper plate part 13 installed to face each other at a predetermined distance from the base part 11, a base part 11, and an upper plate part 13. And a plurality of leg portions 15 installed to connect the upper plate portions 13 to support the upper plate portions 13.

In the central region of the upper plate portion 13, the rotary shaft 20 is installed to pass therethrough, and the rotary shaft housings 21 are disposed concentrically to surround the rotary shaft 20. The roller support brackets 23 supporting the support rollers 24 are radially spaced apart from each other in the rotary shaft housing 21. The support member 25 is provided in the center area | region of the base part 11 along the axial direction of the rotating shaft 20, and the cylinder mechanism 27 which raises and drives the rotating shaft 20 on this support member 25 is installed. It is.

On the lower side of the upper plate portion 13, the rotary shaft drive motor 30 is installed at a predetermined distance from the rotary shaft 20 so as to drive the rotary shaft 20, and the pulley 31 is provided in the upper region of the rotary shaft drive motor 30. It is prepared. The pulley 29 is also provided in the rotating shaft 20 corresponding thereto, and is connected to each other by the timing belt 33.

An air suction path 22 is formed along the axis of the rotary shaft 20, and the upper region is rotatably supported by the upper end of the rotary shaft housing 21. A centering member 37 is installed in the upper region of the rotating shaft 20 so as to be inserted into the neck portion 5 of the funnel 1 to extend along the axial direction of the rotating shaft 20. An airtight contact member 39, which is spaced apart from the inner wall surface of the funnel 1 by a predetermined distance, is provided.

The hermetic contact member 39 is formed of a disk-shaped rubber member, which extends in a radial direction on the rotation shaft 20 and is coupled to the fixed support member 38 coupled to the rotation shaft 20 so as to be integrally rotatable. A plurality of screw holes 40 are formed to be able to. The outer circumferential edge region 42 of the hermetic contact member 39 is formed to gradually become thinner toward the outside so as to be in hermetic contact with the inner wall of the funnel 1. A plurality of air intakes 41 are formed between the centering member 37 and the hermetic contact member 39 so as to communicate with the air intake passage 22 formed along the axis. The support plate 43 for supporting the funnel 1 by weight rotates integrally with the rotary shaft 20 by extending in the radial direction below the airtight contact member 39 and contacting the inner wall surface of the funnel 1. Are combined as possible. One end of the rotary shaft 20 is rotatable integrally with the rotary shaft 20 so as to discharge air in the inner space 44 of the funnel 1 partitioned by the hermetic contact member 39, and the other end is a vacuum pump. A rotary joint 45 connected to 47 is installed.

On the other hand, the upper region of the support frame 10 is provided with a bevel cutting portion for forming a bevel by grinding the joint end surface portion 3 of the funnel 1 rotated by the rotation shaft 20. The bevel cutting part has a pair of sliding drive parts 51 installed on one side edge of the upper plate part 13 so as to be accessible to each other, and each of the sliding drive parts 51 includes a motor support arm extending to a rotation region of the funnel 1. 53) is formed. In the free end region of each motor support arm 53, there is formed a grinding portion 55 which is driven by an air motor (not shown) to polish the bonded end surface portion 3 of the funnel 1.

By this structure, when the funnel 1 conveyed from the previous process is supported from below by the support plate 43 and the centering member 37, the vacuum pump 47 is the funnel partitioned by the hermetic contact member 39. Air is drawn out from the internal space 44 of (1) through the air suction path 22 of the rotating shaft 20. At this time, the inner space 44 of the funnel 1 partitioned by the hermetic contact member 39 is in a negative pressure state and the funnel 1 is chucked along the rotating shaft 20 descending by the cylinder mechanism 27. The joint end surface portion 3 of the funnel 1 is lowered to contact the support roller 24.

The rotary shaft drive motor 30 drives the rotary shaft 20 at a predetermined rotational speed, and each sliding drive portion 51 has a grinding portion 55 in the inner edge region of the joint end portion 3 of the funnel 1. Sliding to be in contact. Then, each sliding driving unit 51 is slid and moved according to the rotational angle position of the funnel 1 so that the grinding unit 55 may polish the bonded end surface 3 of the funnel 1.

As described above, according to the present invention, the chucking time of the funnel can be shortened, unlike the conventional case in which the funnel is chucked from the upper side and the lower side by chucking the funnel using the vacuum. In addition, it is possible to eliminate the configuration of the upper support member and the pivoting arm configured to pressurize the funnel from the upper side to reduce the cost, there is provided a bevel grinding device of the funnel for the cathode ray tube compact structure.

Claims (3)

In the bevel grinding device of a cathode ray tube funnel having a rotary support portion for supporting rotation of the bonded end face of the cathode ray tube funnel, and a bevel cutting portion for cutting the edge of the bonded end face portion, A tubular rotary shaft installed in an upright state and having an air suction path along the shaft center; A centering member installed to extend along an axial direction of the rotation shaft and inserted into a neck portion of the funnel; An airtight contact member extending transversely in the axial direction to an upper region of the rotary shaft and contacting an inner wall surface of the funnel; And a vacuum pump for hermetically contacting the hermetic contact member and the inner wall surface of the panel by drawing air between the hermetic contact member and the inner wall surface of the funnel through an air suction path formed in the rotary shaft. Bevel grinding device for funnels for cathode ray tubes. The method of claim 1, Bevel grinding device for a cathode ray tube funnel, characterized in that it further comprises a support plate for contacting the inner wall surface of the funnel at a position spaced along the axial direction of the hermetic contact member and the rotary shaft to support the funnel. The method according to claim 1 or 2, The bevel grinding unit of the bevel grinding device for a cathode ray tube funnel, characterized in that it comprises at least one pair of grinding parts arranged at equal intervals on the same rotation plane.