JPH0753248Y2 - Cathode ray tube sealing head - Google Patents

Description

The present invention relates to a cathode ray tube sealing device, and more particularly to a sealing head that holds a bulb and an electron gun.

[Conventional technology]

A sealing device for heating and welding an electron gun to a valve has a plurality of sealing heads for holding the valve and the electron gun arranged at equal intervals on the outer circumference of the turntable, and intermittently drives the turntable while rotating the sealing head. The sealing head is adapted to be moved to a plurality of working positions.

Of these, the sealing head holds a valve holder 7 and a neck 16 for holding the face surface of the valve 11 on the main base 2 of the sealing head, as shown in FIGS.
Mounted rod 13 that holds the electron gun and the alignment holder 3 that regulates the rotation direction of the neck chuck 1 and the valve 11 for aligning the center of the stem pin circle of the neck 16 and the electron gun (not shown). And have.

The valve holder 7 has a structure in which a valve holder dedicated to each type is placed on a steel ball 9 placed in a recess of the main base 2 and a metal fitting 8 prevents the steel ball 9 from jumping out. The valve holder 7 can freely move on a plane within the range of the clearance between the guide hole formed in the valve holder 7 and the guide shaft 10 inserted therein. This is because the valve 11 is positioned by the upper alignment holder 3 and the lower neck chuck 1, so that the valve holder 7 in the middle part needs to move freely so as not to obstruct the listening of the position. The neck chuck 1 is screwed to the lower surface of the main base 2, and the three alignment holders 3 are screwed to the upper surface of the main base 2.

On the other hand, as shown in FIG. 3, the neck chuck 1 uses the structure previously proposed by the present inventor (actually developed 58-133254), and the neck chuck itself has different neck diameters. But you can share it.

By the way, even if the type of valve is only related to the shape of the sealing head, there are differences in size, sealing length (the length from the valve reference line to the sealing position), neck diameter,
There are various types such as the difference in deflection angle. For this reason, the sealing head is unitized by assembling the neck chuck, valve holder, and alignment holder on the main base,
Each type was equipped with a dedicated head.

Therefore, when changing the product type, the sealing head was removed and replaced.

In another method, as described in Japanese Utility Model Laid-Open No. 61-8937, a pulse motor or the like is used to change the rising position of the electron gun due to the difference in the sealing length in order to omit the replacement of the sealing head. , A mechanism that can stop the rising position of the mount rod in a stepwise manner, a mechanism that can hold the mount rod in a stepwise manner, and raise and lower the work burner according to the holding height of the mount rod. A sealing device has been devised which is characterized by having a mechanism freely provided and a mechanism for controlling these.

According to this method, if the data of the sealing length is input in advance for each sealing head, the rising position of the mount rod is controlled for each head by a pulse motor or the like,
Stop at a position that matches the sealing length, and move to each work position while holding it.

Since the burner height is controlled at a position corresponding to the sealing length at each work position, it is possible to cope with the difference in sealing length without replacing the sealing head.

[Problems to be solved by the device]

The problem with the former method of dedicating the sealing head and replacing each sealing head is that, firstly, according to the production quantity of each product
This means that a dedicated sealing head must always be stored as a spare, which increases the space for storage.

Secondly, the sealing head is attached to the sealing device via two support rods, and this mounting fits around the H7 tolerance hole and the h6 tolerance axis to prevent misalignment during use. Have been combined.

In addition, the heat of the burner causes thermal deformation, and when the sealing head is removed, it cannot be removed without using a plastic hammer or the like, which requires a lot of time and labor.

Thirdly, when exchanging the sealing head together, the neck chuck is also exchanged.Therefore, it is necessary to make adjustment so that the center of the chuck of the neck chuck and the center axis of the mount rod coincide with each other after the replacement. It was

Regarding the latter problem of the method according to Japanese Utility Model Laid-Open No. 61-8937, firstly, as described above, various mechanisms and their control devices are required on the sealing device side, which makes the device expensive. Secondly, in this invention, since the basic structure of the sealing device is significantly different from the conventional device, it is practically impossible to modify the conventional device, and the sealing device is newly designed and manufactured. There is a need.

Thirdly, as described above, not only the sealing length but also the neck diameter and the position of the alignment are different depending on each type, and in particular, the alignment is a part that regulates the rotation direction of the valve and the electron gun, Receiving a valve other than alignment will cause large variations in the rotation direction, which may affect product quality.
It becomes a big problem.

Although there is no mention of replacement of the alignment holder in Japanese Utility Model Laid-Open No. 61-8937, for the above reasons, the position of the alignment holder needs to accurately receive the alignment position of each product, and the sealing device side Even if various mechanisms are attached, it is inevitable that at least the time for exchanging the alignment holder and its adjustment will be spent.

[Means for Solving the Problems]

The cathode ray tube sealing head of the present invention has means for movably mounting the valve holder incorporated in the main base or the valve holder, and the valve holder is detachably mounted, and between the alignment holder and the main base. It is characterized by having a sub-base.

〔Example〕

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

FIG. 1 shows a partial sectional view of a sealing head according to the present invention, and the same parts as those of the conventional sealing head shown in FIG. Here, the neck chuck is configured so that it can be commonly used for products having different neck diameters. That is, as shown in FIG. 3, the left and right V-shaped claws 14 have a structure of reciprocating linear motion, and the reciprocating motion has the smallest neck diameter (for example, φ2.
It has a stroke that can hold the neck of 2.5), so a product with a large neck diameter (for example, φ29.1) can be held in the middle of the stroke.
However, since the main base of the conventional sealing head is dedicated, the entire sealing head including the neck chuck is replaced. For this reason, it was necessary to adjust the center position of the chuck of the neck chuck each time it was replaced.

In the present invention, the main base 2 is shared among the various types, so that the replacement of the main base 2 and the neck chuck 1 is unnecessary.

In order to share the main base 2, the alignment holder 3 is mounted on the sub base 4 as shown in FIG. 1, and the sub base 4 and the main base are fixed. The main base 2 and the sub base 4 are fixed by two pins 5 and two bolts 6 for positioning. By setting the mounting position to be the same for each type, the alignment holder 3 can be replaced by replacing the sub base 4 with each other, and the main base 2 and the neck chuck 1 do not need to be replaced.

Further, if the sub-base 4 and the alignment holder 3 are dedicated and stored in a fixed state, only two bolts 6 are needed for replacement, which is completed in an extremely short time. Further, the adjustment time is determined by the pin 5, so fine adjustment is sufficient.

Next, replacement of the valve holder 7 will be described.

In the conventional sealing head, as shown in FIG.
It was necessary to remove the metal fitting 8 in order to remove.

According to the present invention, by assembling the metal fitting 8 on the main base 2 side as shown in FIG. 1, the valve holder 7 is simply mounted on the steel ball 9 in alignment with the guide shaft 10, and can be attached and detached with one touch. It has become possible.

Since the valve holder 7 is always applied with a downward force by its own weight and the valve 11, the valve holder 7 does not deviate from the guide shaft 10 during use.

FIG. 2 is a second embodiment of the valve holder according to the present invention. In the second embodiment, a steel ball 9 for freely moving the valve holder 7 on a horizontal plane of the main base 2 is assembled to the valve holder 7, and the metal ball 8 is held by the metal fitting 8.

When using, the contact surface of the main base 2 and the valve holder 7
The steel balls are in contact with each other at two points on the contact surface of
Since they do not come into contact with each other, they do not hinder the smooth movement of the valve holder.

The other structure is the same as that of the first embodiment.

[Effect of device]

As described above, since the sealing head of the present invention is provided with the valve holder that is movable in the horizontal direction and the sub base on which the alignment holder is mounted, the main base and the neck chuck are shared regardless of the type. It Therefore, common parts do not need to be replaced, and the installation and adjustment time required for product replacement can be omitted, and the storage space for these replacement parts can be reduced.

Also, by simplifying the installation and removal of the alignment holder and valve holder, the total replacement time, including the adjustment time, can be shortened to 1/2 to 1/3 of the conventional time.

Further, in the present invention, since the sealing device does not need to be changed at all, it is not necessary to stop the device for modifying the sealing device, and the mixed use with the conventional sealing head is possible.
The sealing head of the present invention can be sequentially replaced without causing any problems in production.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a sealing head according to the present invention. FIG. 2 is a sectional view showing a valve holder portion of a second embodiment of the sealing head according to the present invention. Fig. 3 is a plan view of the neck chuck according to S.K. 58-133254. FIG. 4 is a partial sectional view of a conventional sealing head.

Claims (1)

[Scope of utility model registration request] 1. A valve holder movably and horizontally arranged on a main base so as to hold a valve funnel with a face surface facing upward, and a valve holder attached to the main base so as to hold a valve neck. A neck chuck and an alignment holder arranged on the main base via a sub-base so as to maintain the valve alignment. The main base and the neck chuck are commonly used among valve types and aligned with the valve holder. A cathode-ray tube sealing head that facilitates holder mounting and adjustment.