JPH0638360Y2 - Cathode ray tube shrink fitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a shrink fitting device for shrink fitting an explosion-proof band welded and fixed to a set mounting seat to a valve in a manufacturing process of a cathode ray tube, particularly a color picture tube. .

[Prior Art] As shown in FIG.
As shown in (b), an explosion-proof band (hereinafter abbreviated as band) 2 is fixed to the outer periphery of the valve 1 by a method such as shrink fitting. In addition, a mounting seat 3 for fixing the cabinet is previously fixed to the band 2 at four places of each corner by spot welding or the like, and when the valve 1 is mounted on the cabinet (not shown), the valve 1 is installed in the cabinet. The mounting seat is placed in contact with the mounting portion provided around the mounting window on the back side of the cabinet, and fixed by screws.

It is necessary to keep the relative position of the mounting seat 3 relative to the valve 1 within the standard in the shrink fitting process. If they are fixed by being displaced, a gap is created between the mounting portion and the mounting seat 3 in the step of screwing to the cabinet.
It is necessary to insert a spacer to fill the gap and fix it with a screw, a spacer corresponding to the gap must be prepared, and there is a problem that a working process takes a long time.

Therefore, in the shrink fitting process, four reference points 4 are set on the diagonal line of the face surface of the valve 1 as shown in FIGS. It is necessary to shrink fit the band 2 within a range where the distance in the direction is the mounting seat size 5 within the standard.

A conventional shrink fitting device will be described with reference to FIGS. 3 (a) and 3 (b).

The work process by the shrink fitting device can be divided into three processes, a band burning process, a shrink fitting process, and a cooling process.

In the band burning process, as shown in FIG. 3A, the mounting seat 3 welded and fixed to the band 13 is set on the mounting seat receiver 6 provided corresponding to the position of the mounting seat 3, and the inside of the band is burnered. 7 is heated and expanded.

At this time, the valve 1 is positioned at the rising end position of the cylinder 8 by the alignment support portions 9 at three locations and the reference point support portions 10 at four locations in the valve center line and in the rotational direction about the valve center line. It is adsorbed and fixed by the adsorption pad 11.

In the shrink-fitting process, after the burning process is completed, as shown in FIG.
Burning of the burner 7 is stopped and the burner 7 descends. At the same time, the valve 1 is lowered together with the pedestal 12 by the cylinder 8 to the lower end and inserted into the band 13.

The lowered position of the valve 1 is adjusted so that the distance between the mounting seat receiver 6 and the reference point support portion 10 in the lowered position is equal to the mounting seat size 5 in FIG. 1 (b).

After that, in the cooling step, cooling air is blown toward the band 13 from an air outlet (not shown),
The band 13 is rapidly cooled to shrink the band 13 to complete the shrink fitting.

[Problems to be solved by the device]

However, the above-described conventional shrink fitting device supports the valve 1 by the four fixed reference point supporting portions 10, so that the plane formed by the three reference point supporting portions 10 is There is a possibility that one reference point support portion 10 will deviate from the above-mentioned plane, and there is variation in the curvature of the valve face surface. Therefore, at any one position, the reference point 4 of the valve 1 and the reference point support portion 10 There was a gap between the and, and the positioning of the valve 1 was unstable. The size of the gap varies depending on the size and curvature of the valve, but for example, in the case of the 14-inch size, there is a variation within the range of ± 0.2 mm, which has the drawback of deteriorating the accuracy of the mounting seat size. .

An object of the present invention is to provide a shrink fitting device for a cathode ray tube which solves the above problems.

[Means for Solving the Problems]

To achieve the above object, a shrink fitting device for a cathode ray tube according to the present invention includes a support frame, a machine frame, and a unit, and burns an explosion-proof band welded and fixed to a mounting seat to a cathode ray tube valve. It is a shrink fitting device for a cathode ray tube to be fitted, in which a support frame is installed so as to be able to move up and down, and has an upper stage pedestal and a lower stage pedestal. The upper stage pedestal receives the cathode ray tube bulb on its face surface, the lower stage pedestal is installed with a burner for heating and expanding the explosion-proof band, and the machine frame is the support frame. It is fixed around the outer periphery, and the unit is supported by the machine frame so that it can move up and down.
It has a set of a plurality of mounting seat support parts and a reference point support part, and the mounting seat support part receives the mounting seat of the explosion-proof band, and the reference point support part is the face surface of the bulb for the cathode ray tube. The mounting seat receiving support section and the reference point support section of each set are assembled with their relative mounting positions fixed and elastically supported by the machine frame for each set. It is a thing.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

In the figure, the pedestals 12a and 12b are arranged in upper and lower two stages on a support frame 19 which is moved up and down by a cylinder 18, the burner 7 for band heating is installed on the lower pedestal 12a, and the valve 1 is installed on the upper pedestal 12b. The suction pad 11 for vacuum-sucking the valve face 1a and the face support 14 for receiving the valve face 1a are installed, and the machine frame 20 surrounds the periphery of the support frame 19.

Furthermore, a mounting seat receiving support portion 6 that supports the mounting seat 3 welded and fixed to the band 13, and a mounting seat receiving support portion 6 that mounts the mounting seat 3
The mounting seat retainer 15 which is pressed down to the mounting seat 15 and the reference point support portion 10 for supporting the reference point 4 of the valve 1 whose position is restricted relative to the mounting seat receiving support portion 6 are unitized, and each unit U is attached to the mounting seat 3 at the four corners of the valve. The unit U is arranged on the machine frame 20 in correspondence with the mounting position thereof, and each unit U is supported by the guide frame 16 so as to be independently movable up and down, and the unit U is spring-loaded.
Elastically supported independently by 17.

Therefore, each unit U has a guide shaft 16 and a spring 17
Due to this, the structure is such that it can swing in the same direction as the measuring direction of the mounting seat dimension. The distance between the reference point support portion 10 and the mounting seat receiving support portion 6 is set to be the same as the mounting seat dimension 5 in FIG. 2B.

In the embodiment, the valve 1 is positioned in the standby position (see FIG. 3 (a)) by the three alignment support parts 9 and the face surface support base 14 in the valve center direction and the rotation direction about the valve center line. It is carried out and is sucked by the suction pad 11. In this state, the band 13 by burner 7
When the combustion process of the
While being held by 14, it descends by the cylinder 18 and is shrink-fitted in the band.

At this time, the initial height of each reference point support portion 10 is set to be about 1 mm to 2 mm higher than the height of the reference point 4 at the lowered position of the valve 1. By doing so, even if the curvature of the valve 1 varies, the reference point support portion 10 always contacts the reference point 4 during the descent, and after the contact, the spring 17 causes the valve 18 to reach the descent end position of the cylinder 18. It descends with 1. Since each mounting seat receiving support part 6 also descends while maintaining the dimension of the reference point support part 10 for each unit, the mounting seat size from the reference point of the valve 1 to the mounting seat 3 affects the variation of the valve curvature. It can be maintained with high accuracy.

[Effect of the Invention] As described above, according to the present invention, a set of a plurality of reference point support portions and a mounting seat support portion is assembled with their relative positions fixed and the machine frame is assembled for each set. Since each set of reference point supports is raised and lowered according to the variation in the curvature of the face surface of the bulb of the cathode ray tube, all the reference point supports must support the face face of the valve. Therefore, the valve positioning can be stabilized.

Furthermore, the reference point support part and the mounting seat support part of each set are
The relative position is fixed, that is, the position is regulated so that the mounting seat size as shown in FIG. 2 (b) is obtained, and these are integrally elastically supported by the machine frame. The explosion-proof band supported by the mounting-seat receiving support can be attached to the valve supported by the section with high precision at an accurate mounting position.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 (a) is a plan view showing a positional relationship between a valve and a mounting seat.
FIG. 3B is a side view of the same, FIG. 3A is a side view showing a state during a combustion process of a conventional shrink fitting device, and FIG. 3B is a side view showing a state during the shrink fitting process. . 1 …… Valve, 1a …… Valve face surface 3 …… Mounting seat, 4 …… Reference point 6 …… Mounting seat support part, 7 …… Burner 10 …… Reference point support part, 11 …… Suction pad 13… … Band, 14 …… Face surface support 15 …… Mounting seat retainer, 16 …… Guide shaft 17 …… Spring, 18 …… Cylinder

Claims (1)

[Scope of utility model registration request] 1. A shrink fitting device for a cathode ray tube, comprising a support frame, a machine frame, and a unit, and shrink fitting an explosion-proof band welded and fixed to a mounting seat to a cathode ray tube valve by shrink fitting. Is installed so that it can be moved up and down, and has an upper stage pedestal and a lower stage pedestal.The upper stage pedestal and the lower stage pedestal are installed in two stages, the upper stage pedestal and the lower stage pedestal. The lower pedestal is installed with a burner for heating and expanding the explosion-proof band, the machine frame is fixed around the outer periphery of the support frame, and the unit is It is supported by the machine frame so that it can move up and down.
It has a set of a plurality of mounting seat support parts and a reference point support part, and the mounting seat support part receives the mounting seat of the explosion-proof band, and the reference point support part is the face surface of the bulb for the cathode ray tube. The mounting seat receiving support portion and the reference point support portion of each set are assembled with their relative mounting positions fixed and elastically supported by the machine frame for each set. A shrink fitting device for a cathode ray tube, which is characterized in that