JP3943671B2 - Glass tube end glazing device and glazing burner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a glazing burner and a glazing apparatus used for glazing an end face of a glass tube.
[0002]
[Prior art]
Conventionally, when a glass tube used for, for example, a neck tube for a cathode ray tube is commercialized, in order to smooth the end surface of the glass tube cut to a required length, a process called glazing is performed in which the end surface is heated by a burner. Generally done.
[0003]
As one of the devices for heating the glass tube end for this glazing, the glass tube is placed so that its axial direction is perpendicular to the traveling direction of the conveyor, and the chain conveyor, and the conveyor on both outer sides of the path What is provided with the gas burner for glazing fixed to the predetermined position is known.
[0004]
In the glazing apparatus having the above configuration, a plurality of disk pairs facing and rotating at a distance corresponding to the length of the glass tube are mounted on the conveyor chain at an equal pitch, and both ends of the glass tube are formed by rotating disk pairs. It is clamped and transferred while rotating by the movement of the chain and the friction with the rotating disk, and the glass tube end is heated when it passes in front of the burner. Since the glass tube is transferred and heated while rotating, it has an advantage that non-uniform heating of the glass tube end face, that is, firing unevenness hardly occurs.
[0005]
In the above apparatus, the glazing burner 1 is installed horizontally such that a flame is applied to the end face of the glass tube 2 as shown in FIG. As shown in FIG. 8 (B), the surface of the flame formation surface 4 is generally formed by drilling holes so as to be dispersedly arranged on a concentric circle.
[0006]
[Problems to be solved by the invention]
However, the glass tube end glazing device having the above-described configuration has the following difficulties.
[0007]
(1) Since the end face of the glass tube is in direct contact with the rotating disk, scratches and dirt may adhere to the glass tube.
[0008]
(2) If there is a bending of the glass tube, an error in the mounting position of the rotating disk, or a variation in the outer diameter of the rotating disk itself, the glass tube will meander or shift to the left or right with respect to the axial direction as the glass tube rotates. For this reason, the distance between the end face of the glass tube and the burner changes and uneven firing occurs. If you install a guide rod to prevent meandering of the glass tube, you can prevent uneven burning, but if the end of the glass tube contacts the guide rod before or after heating, the glass tube will be deformed or contaminated. There is a new risk of seizure.
[0009]
(3) Among various parts exposed to high temperatures due to the flame of the burner, the rotating disk and bearings of each part are significantly deteriorated and worn, and the conveyor chain is easy to extend, so that the maintenance of the apparatus is not easy. Deterioration and wear of the rotating disk adversely affects the quality of the processed glass tube, and becomes a problem particularly when the total length of the glass tube is short.
[0010]
(4) Although the glazing burner is installed so that the flame is ejected in the horizontal direction, an upward air flow is generated, so that the flame rolls upward and the upper side of the end surface of the glass tube is heated more intensely. It will be. With a flame rolled up upwards, it is difficult to adjust the firepower because it is difficult to understand. Such non-uniformity of heating may not be eliminated simply by rotating the glass tube.
[0011]
(5) When the center of the glass tube end face deviates from the center of the burner, a part where the glass tube end face is exposed to flame and a part where it does not contact are generated, resulting in uneven burning. When the flame opening is dispersed over a wide range in order to prevent such burning unevenness, the rise of the flame becomes more remarkable.
[0012]
As described above, it is difficult to completely prevent burning unevenness with the conventional glass tube end glazing device and the glazing burner, and there is a great possibility that the glass tube is scratched, deformed, or soiled and seized. Depending on the application of the glass tube to be glazed, the quality requirement of the glass tube after heating is very strict, and even a slight amount of dirt adheres to a defective product. For example, when the glass tube is a flareless product of a flare tube for a cathode ray tube, even a slight contamination or foaming (reboil) may cause damage to the flare tube or the cathode ray tube. Therefore, a glazing apparatus that can uniformly heat the end of the glass tube without causing uneven baking or contamination and seizure has been demanded.
[0013]
The present invention has been made in order to overcome the disadvantages of the conventional glass tube end glazing apparatus, and can uniformly heat the glass tube end without requiring a complicated mechanism or maintenance. The object is to provide an excellent glazing device and glazing burner from which a quality glass tube can be obtained.
[0014]
[Means for Solving the Problems]
The present invention has been intensively studied for the above purpose, and the desired effect can be obtained by rotating the burner instead of moving it while rotating the glass tube, and by devising the arrangement of the burner flame mouth. It was discovered and made.
[0015]
That is, the glazing apparatus of the present invention has a flame mouth forming surface formed by drilling a plurality of flame holes on a flat plate surface, and the flame port forming surface is radially formed from the vicinity of the center portion of the flat plate surface. On the radially extending line, the plurality of flame openings are perforated in dotted lines , and the glass tube ends are heated by the flame emitted from the flame opening, rotating around the center of the flame formation surface as the center of rotation. A glazing burner, a glass tube holding means for holding and fixing each of a plurality of glass tubes whose end faces are to be glazed, in parallel with each other at a predetermined distance, are held by the glass tube holding means. Each of the fixed glass tubes, the glass tube transfer means for intermittently moving a predetermined distance in a predetermined direction while maintaining the distance between the glass tubes, and the glazing burner, when the flame mouth forming surface is stopped Glass tube A burner holding means that holds the predetermined position so as to face the end face, and a distance interval between the flame mouth forming face of the glazing burner held by the burner holding means and the end face of the glass tube is set to a predetermined size. It is characterized by comprising burner position adjusting means for adjusting.
[0016]
In the glazing apparatus of the present invention, the glass tube holding means and the glass tube transfer means are not limited to those having a specific mechanism as long as they meet the object of the present invention. As the glass tube holding means, for example, a plurality of glass tube holding means such as a glass tube holding means such as holding the glass tube with the axial direction of the glass tube being orthogonal to the diameter of the plate surface on the circumference of the substantially circular plate surface at equal intervals. You may attach. When the glass tube is held and fixed by such a mechanism, as the glass tube transfer means, the approximate disc surface is rotated with the center of the plate surface being the center of rotation, and each of the plurality of glass tubes is rotated. A method of moving along the circumference of the approximate disc surface can be adopted. For example, a turret or the like in which a plurality of chucks for gripping the glass tube are attached around the rotation surface is suitable as the glass tube gripping means and the glass tube transfer means of the present invention.
[0017]
As another example of the glass tube holding means, the glass tube is held so that the axial directions of the glass tubes are in the same plane, and the glass tube transfer means holds each of the plurality of glass tubes. For example, a chain conveyor may be used that translates while keeping the axial direction within the same plane.
[0018]
In the glazing apparatus of the present invention, the glazing burner has a flame port forming surface in which a plurality of flame ports are perforated on a flat plate surface, and can rotate with the center of the flame port forming surface as the center of rotation. In addition, it is particularly preferable that the plurality of flame openings are perforated in a dotted line on a line extending radially from the central portion of the flat plate surface in the radial direction.
[0019]
As for the arrangement of the glazing burner flame tip, a thin plate-shaped sharp flame can be obtained if it is dotted, and the rotation of the glass tube is less susceptible to the influence of rising airflow by rotation, so that the glass tube end can be heated uniformly. In particular, the arrangement is not limited to one. For example, FIG. 6 (A) (B) (C) (D) or (E) can be mentioned. The dotted line indicating the arrangement of the flame openings does not necessarily have to be a straight line, and may be a curve as shown in FIG. FIG. 6 mainly schematically shows the arrangement of the flame mouth, and the cross indicates the center of the flame mouth forming surface.
[0020]
In order to prevent uneven firing of the glass tube end, it is desirable to pay attention to the following points when designing the arrangement of the flame outlet. First, the flame mouth is not provided at the central portion of the flame mouth forming surface and in the vicinity thereof. It is not preferable that the flame opening is formed at the center, because the flame is connected and becomes larger and is easily affected by the wind. The length of the dotted line indicated by the symbol a in FIG. 6A, that is, the arrangement length of the flame opening is more preferably the thickness of the glass tube so that it is larger than the thickness of the glass tube to be glazed. It should be at least twice as large.
[0021]
The number of the dotted lines is not particularly limited. However, if the number of the flame outlets is increased and the arrangement of the flame openings becomes too dense, the flame is connected and becomes larger, and the effect of preventing uneven burning of the present invention is diminished. The preferable number of dotted lines and the interval between the flame openings vary depending on the diameter and length of the glass tube to be glazed, and thus cannot be determined unconditionally. For example, an outer diameter of about 20 to 30 mm and a thick glass of about 1 to 3 mm When the pipe is glazed, the effect of the present invention can be obtained if the interval between the flame openings is 1 to 2 mm, the number of dotted lines is 1 to 6, and the diameter of the flame opening is about 0.5 to 1 mm.
[0022]
In the glazing burner of the present invention configured as described above, the rotational speed thereof is optimized by adjusting the rotational speed of a speed-variable speed-variable motor. The number of rotations of the burner in the state of heating while facing the end face of the glass tube is more preferably an integer to prevent baking unevenness. The glazing burner of the present invention is more effective because it can be installed not only horizontally but also vertically (upward or downward) during glazing, and is particularly less susceptible to the rising air current during vertical installation.
[0023]
In the glazing apparatus of the present invention, the burner holding means needs to have at least one glazing burner and hold one end of the glass tube in a heatable position. After the end of glazing at one end, glazing can be performed by moving the burner holding means or reversing the holding of the glass tube and heating the other end of the glass tube.
[0024]
The number of glazing burners held by the burner holding means can be increased up to the total number of glass tubes simultaneously held by the glass tube holding means, so that the heating time required for glazing can be shortened. However, it takes time to position the glass tube and the burner, and the apparatus becomes complicated, which is disadvantageous in price. Therefore, it is desirable that the number of glazing burners is appropriately determined within the above range in consideration of these circumstances.
[0025]
In the present invention, in order to shorten the time required for glazing, in addition to increasing the number of glazing burners held by one burner holding means, two burner holding means are prepared, and simultaneously from both ends of the glass tube. It is also possible to configure the device to heat. At this time, if the arrangement of the pair of burner holding means is such that the same glass tube is heated from both ends at the same time, the flames interfere with each other to cause uneven baking on the glass tube, which is not preferable. Therefore, it is desirable that the number and arrangement of the glazing burners held by each burner holding means are determined in consideration of preventing them from simultaneously heating both ends of one glass tube. That is, it is preferable that the number does not exceed half of the total number of glass tubes held by the glass tube holding means, and that the arrangement is not right. It is desirable that the number of glazing burners held by each burner holding means is appropriately determined within the above range according to conditions required for the apparatus.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the details of the present invention will be described according to examples.
[0027]
Example 1
1 and 2 are schematic views showing the configuration of the glazing apparatus according to the first embodiment of the present invention. FIG. 1 partially includes a cross section cut along a plane including the axis of the glass tube to be glazed.
[0028]
1, chucks 6,..., 6 attached to a turret 5 grip the vicinity of the axial center of the glass tubes 2,... 2 to be glazed. Are held in a state of being orthogonal to each other and parallel to each other. In this embodiment, 12 glass tubes are held by the turret 5. The turret 5 is driven by a turret driving device (not shown) and rotates by intermittent operation at predetermined time intervals. By the intermittent operation of the turret 5, the glass tubes 2,... 2 held by the chucks 6,... 6 intermittently perform circular movement along the circumference of the turret 5 without rotating while maintaining a mutual distance interval. To do.
[0029]
The burner holding means 7 is in the axial direction of the glass tubes 2,..., 2 so that the glazing burner 1,. It is arranged at a predetermined position outside. In this embodiment, the burner holding means 7 includes three glazing burners 1, 1, 1 arranged at equal intervals on an arc having a length corresponding to ¼ of the circumference of the turret 5. The attachment position of the glazing burner 1 in the burner holding means 7 is adjusted by the burner position adjusting means 8.
[0030]
As the glazing burner 1, a glazing burner having a flame outlet arrangement shown in FIG. 6 (A) or (B) or (C) is used, and each glazing burner is rotatably supported by a bearing box 9 of the burner holding means 7. The hollow shaft 10 is attached. As shown in FIG. 2, the glazing burner 1 is capable of rotating by the sprocket 11 attached to the hollow shaft 10 being driven by a motor 13 via a chain 12 (shown by a one-dot chain line). . By adjusting the rotational speed of the motor 13, the rotational speed of the glazing burner is optimized. In FIG. 2, the glass tube 2 attached to the chuck 6 is not shown. FIG. 7 shows a schematic view of the cross section of the glazing burner 1 used in the present embodiment (the arrangement of the flame outlet is also omitted), but the present invention is not limited to this.
[0031]
In FIG. 1 and FIG. 2, the burner position adjusting means, the support frame of each means, or the fuel supply system of the burner are not shown or simplified for easy understanding of the configuration of the apparatus.
[0032]
Hereinafter, the glazing of the glass tube end performed using the glazing apparatus of the present invention having the above configuration will be described. First, the chucks 6,... 6 attached to the turret 5 are each gripped near the central portion in the axial direction of the 12 glass tubes 2, 2, and the axial direction is horizontal and perpendicular to the plate surface of the turret 5. However, the glass tubes are positioned so that they are parallel to each other and are not displaced.
[0033]
Next, the position of the glazing burners 1, 1, 1 is adjusted by the burner position adjusting means 8. That is, the distance interval between the flame mouth forming surface 4 of the glazing burner and the end of each glass tube at the time of stopping is made equal, and the center axis of each glass tube and the center axis of rotation of the glazing burner 1 are made to coincide. Thereafter, the glazing burners 1,... 1 are combusted and rotated, the turret 5 is rotated by intermittent operation, and the glass tube end is heated. After such glazing at one end of the glass tube, the burner holding means 7 is moved so that the flame mouth forming surface 4 of the burner 1 faces the other end of the glass tube, and the burner position adjusting means 8 is again formed. After the above adjustment, the rotation of the burner 1 and the intermittent operation of the turret 5 are performed, the glass tube end is heated, and the glazing is completed.
[0034]
When glazing the glass tube end using the glazing apparatus of the present invention, since the glass tube is held and fixed without fear of shifting in the axial direction, the glass tube end surface during heating and the flame mouth forming surface of the glazing burner The distance interval was kept constant and the shortest. Since the fluctuation of the distance interval is suppressed, the occurrence of uneven baking is prevented, a glazed high-quality glass tube can be obtained, and the distance interval can be kept the shortest, so that the burner flame can be made smaller than before. I was able to. Therefore, the consumption amount of fuel gas can be reduced, and the burner flame is hardly influenced by disturbances such as machine operation and wind, and the effect of preventing uneven burning is great.
[0035]
The glazing apparatus of the present invention has a feature that the structure is simple because the glass tube is not rotated and conveyed, and therefore maintenance is easy. Furthermore, the present embodiment also has a feature that it is possible to easily cope with glass tubes having different lengths only by moving the burner holding means.
[0036]
Example 2
A glazing apparatus was constructed in the same manner as in Example 1 except that two burner holding means 7 similar to those used in Example 1 were prepared and arranged at both ends of the glass tube 2. Two burner holding means for holding the burners in the same arrangement were arranged at both ends of the glass tube so that the flame mouth forming surfaces face each other. When glazing of the glass tube was performed from both ends using this apparatus, each glazing burner did not heat both ends of one glass tube at the same time. The glazing could be completed in a shorter time than in the case of Example 1 using one burner holding means.
[0037]
Example 3
3 and 4 are schematic views for explaining another embodiment of the glazing apparatus of the present invention. FIG. 3 is a top view thereof, and FIG. 4 is a side view thereof. In these drawings, the same reference numerals are given to portions common to those in FIGS. 1 and 2.
[0038]
As shown in FIG. 3, the apparatus of the present embodiment has a chain conveyor 14 for transferring the glass tube so that its axial direction is perpendicular to the advancing direction of the conveyor, and predetermined positions on both outer sides of the conveyor path. Rotating glazing burners 1,..., 1 fixed to the main body. In the figure, glass tubes 2 ... 2 are placed and held and fixed on tube receivers 15, ..., 15 attached to the conveyor chain at equal pitches. FIG. 5 is a perspective view of the tube receivers 15,... 15 used in the present embodiment. The tube receivers 15,..., 15 attached to the chain are glass tube holding means for holding the glass tubes so that the axial directions of the glass tubes are parallel to each other and in the same plane in the present invention, The glass tube transfer means corresponds to a chain conveyor that translates each of the plurality of glass tubes while keeping the axial direction within the same plane. In FIG. 5, the arrows indicate the direction of travel of the conveyor.
[0039]
In this embodiment, the glazing burner is arranged so as not to heat both ends of one glass tube at the same time, fixed at a predetermined position on both outer sides of the conveyor path, and intermittent rotation of the burner and chain conveyor. The glass tube ends are glazed by operation.
[0040]
According to this embodiment, the effect of the present invention can be easily obtained by using a part of the conventional apparatus and adding improvements without manufacturing a new apparatus.
[0041]
【The invention's effect】
As described above, according to the present invention, an excellent glazing apparatus and glazing burner capable of uniformly heating the glass tube end without requiring a complicated mechanism and maintenance, and obtaining a high-quality glazed glass tube can be obtained. Can provide.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating a configuration of a glazing apparatus according to a first embodiment.
FIG. 2 is a schematic diagram illustrating a configuration of a glazing apparatus according to a first embodiment.
FIG. 3 is a schematic view showing the top surface of a glazing apparatus of Example 3. FIG.
FIG. 4 is a schematic view illustrating a side surface of a glazing device according to a third embodiment.
5 is a perspective view of a tube receiver used in the glazing apparatus of Embodiment 3. FIG.
FIG. 6 is a view showing an example of a flame mouth forming surface of the glazing burner of the present invention.
7 is a cross-sectional view of a glazing burner used in Example 1. FIG.
FIG. 8 is a schematic side view (A) of an example of a conventional glazing burner and a schematic view (B) showing a surface of a flame port forming surface.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Glazing burner, 2 ... Glass tube, 3 ... Flame mouth, 4 ... Flame mouth formation surface, 5 ... Turret, 6 ... Chuck, 7 ... Burner holding means, 8 ... Burner position adjustment means , 9 ... Bearing box, 10 ... Hollow shaft, 11 ... Sprocket, 12 ... Chain, 13 ... Motor, 14 ... Chain conveyor, 15 ... Tube receiver

Claims (4)

A plurality of flame holes formed on the flat plate surface, and the plurality of flame hole forming surfaces are arranged on a line extending radially from a central portion of the flat plate surface in a radial direction; A glazing burner that rotates around the center of the flame mouth forming surface as a center of rotation and heats the end of the glass tube with the flame emitted from the flame mouth,
Glass tube holding means for holding and fixing each of the plurality of glass tubes whose end faces are to be glazed, with the axial directions being parallel to each other at a predetermined distance interval;
Each of the glass tubes held and fixed by the glass tube holding means, a glass tube transfer means for intermittently moving a predetermined distance in a predetermined direction while maintaining a distance distance between the glass tubes,
Burner holding means for holding the glazing burner at a predetermined position so that the flame-forming surface of the glazing burner faces the end face of the glass tube when stopped;
Burner position adjusting means for adjusting the distance interval between the flame mouth forming surface of the glazing burner held by the burner holding means and the end face of the glass tube to a predetermined size;
A glass tube end glazing device characterized by comprising:  The glass tube holding means has a plurality of glass tube holding means for holding the glass tube at equal intervals on the circumference of the substantially disk surface, with the glass tube axial direction orthogonal to the plate surface radial direction. 2. The glass tube according to claim 1, wherein the glass tube transfer means rotates the approximate disk surface to move each of the plurality of glass tubes along the circumference of the approximate disk surface. End glazing device. The glass tube end glazing device according to claim 1 or 2, wherein the glass tube transfer means translates each of the plurality of glass tubes. A plurality of flame mouths have a flame mouth forming surface formed by drilling holes on a flat plate surface, and can rotate with the center of the flame mouth forming surface as a center of rotation. A glazing burner, wherein the plurality of flame openings are perforated in a dotted line on a line extending radially in the radial direction from the vicinity of the central portion of the flat plate surface.

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