JPH10208669A - Reinforcing metal fitting and its assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing metal fitting which can be automated easily, and can be mass produced by a low cost equipment. SOLUTION: A frame form reinforcing metal fitting to reinforce the sealing part between the panel and the funnel of a cathode-ray tube by surrounding it is composed of a frame form member 1 made by forming a band form metal member into the frame form, and a welding metal fitting 2 superposed on the ends of the butting end of the frame form member 1 by bridging. Projection welding parts 3a and 3b are provided at least one point of the welding parts of the ends of the butting end of the frame form member 1, and the welding metal fitting 2, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame-shaped reinforcing member, and more particularly to a reinforcing member for reinforcing a panel portion and a funnel portion of a cathode ray tube, and a method of assembling the same.

[0002]

2. Description of the Related Art A vacuum envelope made of glass constituting a cathode ray tube or the like is provided with a mechanical reinforcing means in order to safely maintain a high degree of vacuum inside. In particular, the vacuum envelope constituting the color cathode ray tube is so-called implosion by tightening a reinforcing bracket such as a steel material around the vicinity of the sealing portion of the funnel portion connected to the panel portion and the neck portion constituting the screen. It has a structure to prevent

FIG. 5 is a sectional view for explaining a structural example of a shadow mask type color cathode ray tube to which the present invention is applied.
Numeral 0 denotes a panel portion constituting a screen, 11 denotes a neck portion for accommodating an electron gun, 12 denotes a funnel portion connected to the neck portion and seals with the panel portion, 13 denotes a phosphor film applied to the inner surface of the panel portion, 14 denotes a phosphor film. Is a shadow mask, 15 is a mask frame, 16 is a magnetic shield, 17 is a mask suspension mechanism, 1
8 is an electron gun, 19 is a deflection yoke, 20 is a magnetic correction device,
21 is a stem pin, 22 is a reinforcing bracket.

[0004] The panel 10, the neck 11, and the funnel 12 constitute a vacuum envelope, and the panel 10 and the funnel 12 are sealed with frit glass.

In the vicinity of the sealing portion, a band-like reinforcing metal fitting 2 is provided.
2 is tightly wound around, and suppresses deformation of the envelope when the inside of the vacuum envelope is evacuated, and prevents so-called implosion.

The three electron beams (Bc, Bs × 2) emitted from the electron gun 18 housed in the neck portion 11 are horizontally and vertically by a deflection yoke 19 provided in a transition region between the neck portion 11 and the funnel portion 12. Are deflected in two directions, and are color-selected by a large number of apertures formed in the shadow mask 14 to strike each of the three color phosphors constituting the phosphor film 13 to form a required color image on the screen. I do.

FIG. 6 is an explanatory view of an example of the prior art of the method of assembling the above-mentioned reinforcing bracket. In the figure, first, a band 5 is obtained by partially turning a belt-shaped steel material having a predetermined length by roll forming (a). This is bent by a bending machine to form a frame-shaped member 1, which is then conveyed to a spot welding machine, and a welding fitting 2 is temporarily attached to one end thereof by spot welding 4 (b).

This is transported to a spot welding machine for fixing to the final specification, and is finished to a reinforcing bracket of a predetermined final specification (c).

FIG. 7 is an explanatory diagram of another example of the prior art of the method of assembling the reinforcing metal. In this assembling method, the band-shaped band 5 is obtained by partially turning a band-shaped steel material having a predetermined length by roll forming (a). This is bent by a bending machine to form a frame-shaped member 1, and a required number of spot welds 4 are applied to a portion where the welding metal 2 and the frame-shaped member 1 are overlapped to complete a reinforcing metal having predetermined final specifications (b). .

[0010]

In the former prior art, since the welding metal 2 is temporarily attached to one end of the frame-shaped member 1, the both ends of the frame-shaped member 1 are opened by springback during the transportation. However, there is a problem that it is difficult to automate the conveyance.

Further, the latter conventional technique requires a processing machine for simultaneously performing bending and a plurality of spot weldings, and has a problem that equipment costs are increased.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a reinforcing bracket which can be easily automated and mass-produced with inexpensive equipment, and a method of assembling the same.

[0013]

According to a first aspect of the present invention, there is provided a frame-shaped reinforcing metal which surrounds a sealing portion between a panel portion and a funnel portion of a cathode ray tube and reinforces the same. A frame-like member formed by shaping a material into a frame-like shape, and a welding fitting overlapped by bridging each end of the butt end of the frame-like member and each end of the butt end of the frame-like member. A projection welding portion is provided at at least one point of each of the welding portions with the welding fitting.

According to a second aspect of the present invention, there is provided a method for assembling a frame-shaped reinforcing metal member which revolves around a sealing portion between a panel portion and a funnel portion of a cathode ray tube and reinforces the same. After bridging the welding metal fittings at the ends of the butted ends of the members and superimposing the welding metal fittings by applying projection welding to at least each one of the overlapped portions of the welding metal fittings, the respective end parts are joined together. And spot welding is performed at a plurality of overlapping portions of the welding metal.

Further, a method of assembling a reinforcing bracket according to a third aspect is characterized in that the spot welding is performed including the projection welding portion in the second aspect.

As described above, according to the present invention, since the welding metal fittings are temporarily attached to both ends of the band in a state where the band is bent, the springback during the transportation as in the prior art is prevented, and Automation becomes easier.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to examples.

FIG. 1 is an explanatory view of one embodiment of a reinforcing bracket according to the present invention, wherein (a) is a plan view and (b) is a side view. In the figure, 1 is a frame-like member, 2 is a welding fitting, 3
Reference numerals a and 3b denote projection welds, and reference numeral 4 denotes a spot weld.

The reinforcing metal member 17 is formed by bridging a band-shaped metal material (band) 5 such as a steel material to both ends of a frame-shaped member 1 formed into a frame shape, and welding and fixing the welding metal members 2 to each other. You.

In this embodiment, projection welding and spot welding are used for this welding. That is, the projection welding portions 3a and 3b are used to temporarily attach the butting ends of the frame-shaped member 1 with the welding metal fitting 2, and the spot welding is used for welding as the reinforcing metal fitting of the final specification. At this time, spot welding may be performed on the projection-welded portion.

FIG. 2 is an enlarged view of the welding metal part of FIG. 1, and 6 is a butt end.

In the figure, welding metal fittings 2 are overlapped so as to bridge the butting ends 6 of a frame-shaped member 1 formed by processing a band-shaped band into a frame shape. Projection welds 3a and 3b for tacking are applied to each of them.
The process is performed at a plurality of locations including b (12 locations in this embodiment).

The projection welds 3a, 3b
It is not always necessary to perform spot welding, but it is desirable to perform spot welding on this portion in order to secure the welded portion and increase the welding strength.

FIG. 3 is a schematic process drawing for explaining one embodiment of the method of assembling the reinforcing bracket according to the present invention. Reference numeral 5 denotes a band-like band (hereinafter, referred to as a band-like band or simply a band).

First, a band-shaped metal material such as a steel material is roll-processed at a position in the width direction by rolling to obtain a band-shaped band 5 (a). The band-shaped band 5 is bent into a frame shape by a bending machine to form the frame-shaped member 1 (b). Both ends of the frame-shaped member 1 are butted, and the welding fitting 2 is positioned so as to overlap both ends of the butted end 6 (c).

That is, the welding metal fittings 2 are overlapped by bridging each end of the butt end 6 of the frame-shaped member 1, and the projection welding 3 a is attached to at least each one of the overlapping parts of the respective ends and the welding metal fitting 2. 3b, and then temporarily attached (d), and spot welding 4 is applied to a plurality of overlapping portions of the ends and the welding fitting 2 (e).

FIG. 4 is an enlarged view of the butted portion in a state where the projection welding 3a and 3b in FIG.

In this embodiment, the welding metal fitting 2 is
Is formed in a shape corresponding to the folding step, and the projections 3a and 3b for tacking are formed by positioning the frame-shaped member 1 so as to overlap with both ends with a butt end (indicated by a dotted line in the figure) therebetween. . The projection weldings 3a and 3b are not limited to the positions shown in the figure, and may be applied to at least one of the positions connecting both ends.

Thus, when the frame member 1 to which the welding fitting 2 is temporarily attached is conveyed to the spot welding machine, the frame member 1 is
However, since there is no need to integrate a processing machine for forming a band-like band into a frame-like member and a spot welding machine as in the latter conventional technique, there is no need for an increase in equipment costs. , Can be automated.

The present invention can be applied not only to the above-mentioned reinforcing metal fitting for a cathode ray tube but also to the assembly of a rigid body having a similar shape.

[0031]

As described above, according to the present invention, projection welding for tacking is performed on both ends of the butt of the frame-shaped member, so that it can be automated using a conventional bending machine and a spot welding machine. And a method of assembling the reinforcing bracket, which can be easily mass-produced with inexpensive equipment.

[Brief description of the drawings]

FIG. 1 is an explanatory view of one embodiment of a reinforcing bracket according to the present invention.

FIG. 2 is an enlarged view of a welding metal part of FIG.

FIG. 3 is a schematic process diagram illustrating one embodiment of a method for assembling a reinforcing bracket according to the present invention.

FIG. 4 is an enlarged view of a butt portion in a state where projection welding is performed and tacked in FIG. 3;

FIG. 5 is a cross-sectional view illustrating a structural example of a shadow mask type color cathode ray tube to which the present invention is applied.

FIG. 6 is an explanatory diagram of an example of a prior art of a method of assembling a reinforcing bracket.

FIG. 7 is an explanatory view of another example of the prior art of the method of assembling the reinforcing fitting.

[Description of Signs] 1 Frame-shaped member 2 Welding fittings 3a, 3b Projection welded part 4 Spot welded part 5 Band-shaped band 6 Butt end.

Claims (3)

[Claims] 1. A frame-shaped reinforcing metal member which circulates around a sealing portion between a panel portion and a funnel portion of a cathode ray tube and reinforces the metal member, wherein the reinforcing metal member is formed by shaping a band-shaped metal material into a frame shape. At least one point of a welded portion between each end of the butt end of the frame-shaped member and each of the welded brackets. A reinforcement fitting characterized by having a projection welded portion. 2. A method of assembling a frame-shaped reinforcing metal member for revolving around a sealing portion between a panel portion and a funnel portion of a cathode ray tube, wherein each of abutting ends of a frame-shaped member formed by shaping a strip-shaped metal material into a frame shape. After bridging the welding brackets at the ends and projecting at least one of the overlapped portions of the respective ends and the welding fittings by performing projection welding, and then temporarily bonding the respective ends and the welding fittings, A method for assembling a reinforcing bracket, wherein spot welding is performed on a plurality of portions. 3. The method according to claim 2, wherein the spot welding is performed including the projection welding portion.