JP3154143B2 - Positioning device for cylindrical body with cap and assembly device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device for a cylindrical body, and more particularly, to a positioning device for assembling and joining a sleeve and a cap of a cathode cap used for an electron gun of a picture tube.

[0002]

2. Description of the Related Art A picture tube used in a television receiver is called a cathode ray tube or a cathode ray tube (CRT). An electron gun and a fluorescent screen are provided inside a funnel-shaped glass outer tube (glass bulb). It is enclosed. The electron gun includes a cathode that emits electrons, and a plurality of cylindrical electrodes that combine the electrons into a flow bundle to form an electron beam, accelerate at a high speed, and focus on a phosphor screen. In the case of a color picture tube, for example, three electron beams emitted, controlled, accelerated, and focused from an electron gun are deflected by a deflection yoke to scan the entire fluorescent screen. .

[0003] A cathode structure constituting an electron gun is inserted into a through hole of a ceramic disk which is an insulator while a heater cathode is supported by a sleeve holder, and a radiator attached to the tip of the heater cathode is attached to the ceramic disk. It is fixed to the cylindrical electrode of the provided first grid at a predetermined interval. Then, by heating and activating the radiator, thermoelectrons are emitted, and the first grid,
The electron beam is accelerated and focused by a plurality of cylindrical electrodes such as a second grid.

As shown in FIG. 6, the heater cathode comprises a cap 2 coated with a radiator 15 for emitting thermoelectrons, and a sleeve 1 having a heater (not shown) therein. The cap 2 is pushed into one end of the base 1 and the joint 13 is fixed by laser welding.

[0005]

In the process of pushing the cap into the sleeve, it is necessary to push the cap in a state where the separately supplied sleeve and the cap are relatively accurately positioned.

If the sleeve is pushed in a state where the relative position between the sleeve and the cap is shifted, there is a problem that the end of the sleeve is damaged because the strength of the sleeve is relatively small. As described above, if the heater cathode is assembled in a state where the sleeve is damaged, the strength of the joint between the sleeve and the cap is reduced, so that the joint may be damaged when the radiator is heated.

The present invention has been made in view of such problems of the prior art, and aims to relatively accurately position a cylinder and a cap to prevent damage to the cylinder or the cap. Aim.

[0008]

In order to achieve the above object, a positioning device for a cylindrical body with a cap according to the present invention positions the cylindrical body and the cap when pushing the cap into at least one end of the hollow cylindrical body. A base provided with a pin for inserting a hollow portion of the cylindrical body, and a suction punch that sucks the cap and moves toward and away from the cylindrical body placed on the base. The cylindrical body mounted on the base and the cap which is adsorbed by the suction punch and approaching and moving away from the side with respect to the cap approaching the cylindrical body, and the tip corresponds to the shape of the cylindrical body and the cap respectively. And a pair of guide plates having guide grooves formed as described above.

It is preferable that an elastic body is interposed between the suction punch and a driving unit for moving the suction punch. Preferably, the cylindrical body with a cap is a cathode cap constituting an electron gun of a picture tube.

To achieve the above object, the present invention provides an apparatus for assembling a cylinder with a cap, wherein the cap is pushed into at least one end of a hollow cylinder, and the cylinder and the cap are joined together. In the attaching device, an index table that sequentially arranges a plurality of bases provided with pins for inserting hollow portions of the cylindrical body, and sequentially sends a work,
Around the index table, disposed at a position corresponding to the feed pitch of the index table, cylindrical body supply means for inserting the hollow portion of the cylindrical body into the pins of the base, around the index table, Disposed at a position corresponding to the feed pitch of the index table,
The cap is sucked and the cap is brought closer to the cylinder placed on the base, and the cylinder and the cap are brought close to each other by a guide groove formed at the tip by approaching from the side of the cylinder and the cap. Positioning and pushing means for pushing the cap into the cylindrical body, and disposed around the index table at a position corresponding to the feed pitch of the index table, and the cap is placed on the positioning and pushing means. A cap supplying means for supplying, and a joining means disposed around the index table at a position corresponding to a feed pitch of the index table, for welding a joint between the cylindrical body and the cap. Features.

Preferably, the cylindrical body with a cap is a cathode cap constituting an electron gun of a picture tube.

[0012]

When the cap is pushed into at least one end of the hollow cylinder by the cylinder positioning device according to the present invention, first, the hollow portion of the cylinder is inserted into the pin of the base. At about the same time, the cap is adsorbed on the suction punch and brought closer to the cylinder placed on the base.

Next, with respect to the cylindrical body placed on the base and the cap which has been sucked by the suction punch and approached the cylindrical body,
A pair of guide plates are approached from their side surfaces, and the cylindrical body and the cap are sandwiched in a guide groove formed at the tip of the guide plate. Thereby, the cylindrical body and the cap are relatively positioned with the processing accuracy of the guide groove formed in the guide plate.

With the cylindrical body and the cap sandwiched by the guide plate, the suction punch is further moved closer to the base, and the cap is pushed into the cylindrical body. Since the cylindrical body and the cap are relatively accurately positioned by the guide plate, the cap is smoothly pushed into the cylindrical body. Further, since the guide plate moves toward and away from the cylindrical body, it is extremely easy to take out the work after attaching the cap, and the degree of freedom of application to other assembling devices is increased.

At this time, if an elastic body is interposed between the suction punch and a driving unit for moving the suction punch, the cylindrical body and the cap are sandwiched by the guide plate, and when the cap is pushed in from this state. No excessive pressing force is applied.

Further, when the cap is fixed to the cylindrical body by the apparatus for assembling a cylindrical body of the present invention, a plurality of bases provided with pins for inserting the hollow portions of the cylindrical body are arranged, and the workpiece is sequentially processed. While rotating the index table to be fed at a predetermined feed pitch, first, the cylindrical body supply means inserts the hollow portion of the cylindrical body into the pin of the base, so that one of the plurality of cylindrical bodies is To supply one cylinder.

In the next table, one cap is sucked from a plurality of caps by the cap supply means, and further, by the positioning and pushing means, the cylindrical body placed on the base and sent by the index table is moved. , Close the cap.

Then, the guide plate is made to approach from the side surfaces of the cylindrical body and the cap, and the cylindrical body and the cap are positioned by the guide groove formed at the tip of the guide plate. And push the cap into the cylinder with a closer approach. Since the cylindrical body and the cap are relatively accurately positioned by the guide plate, the cap is smoothly pushed into the cylindrical body. When the cap is pushed into the cylinder, the index table is fed, and the joint between the cylinder and the cap is welded by the joining means.

Since the cylindrical body supply means, the positioning / pressing means, the cap supply means, and the joining means are arranged around the index table at positions corresponding to the feed pitch of the index table, the cylindrical body and the cap are provided. A series of processing from supply of steel to welding can be performed continuously and automatically.

[0020]

An embodiment of the present invention will be described below with reference to the drawings. First, a specific example of the cylindrical body positioning device of the present invention will be described. FIG. 1 is a front view showing a positioning device according to an embodiment of the present invention, FIG. 3 is a front view showing a specific structure of a guide plate of the embodiment, FIG. ) Is a plan view showing the structure of the guide plate,
FIG. 5B is a side view along the line BB in FIG.
FIG. 3 is a half sectional view showing a cathode cap.

In this embodiment, the case where the cap 2 is pushed into one end of the sleeve 1 of the cathode cap constituting the electron gun of the picture tube shown in FIG. 6 will be described, but the present invention is not limited to the cathode cap. It can be applied to other hollow cylinders and caps.

The positioning device of the present embodiment has a base 5, on which pins 4 for inserting the hollow portion 3 of the sleeve 1 are provided. Since the pin 4 has a function of inserting the hollow portion 3 of the sleeve 1 to perform a certain degree of positioning, it is desirable that the outer diameter of the pin 4 is formed equal to the inner diameter of the sleeve 1. In the embodiment, the outer diameter of the pin 4 is formed to be slightly smaller than the inner diameter of the sleeve 1 so as to improve the supply workability of the sleeve 1.

That is, the position of the sleeve 1 is not determined with precision with respect to the base 5, but the sleeve 1 and the cap 2
If the relative position with respect to is determined, the object of the present device is achieved. In this embodiment, since the sleeve 1 and the cap 2 are configured to be accurately set by the guide plate 8 described later, the sleeve 1 inserted into the pin 4 is relatively rough with respect to the base 5. There is no inconvenience.

Above the base 5 is a suction punch 6 which moves toward and away from the sleeve 1 mounted on the base 5.
a, and the suction punch 6a is supported by the housing 6b together with the housing 6b.
In the example shown in FIG. 1, it moves up and down. In order to adsorb the cap 2, for example, a through-hole (not shown) connected to a suction (vacuum) pump is provided in the suction punch 6a.
Has been established. The suction punch 6a has a function of sucking the cap 2 and transporting it to the position of the sleeve 1, and a function of pushing the cap into the sleeve 1 after the cap 2 is positioned.

In order to prevent an excessive pressing force from acting on the cap 2 when performing the latter function, an elastic body (such as a spring) is provided between the suction punch 6a and the housing 6b. (Not shown) is interposed. When a certain load or more is applied when the cap 2 is pushed into the sleeve 1 by this elastic body, the cap 2
Hold the housing 2b relatively against the elastic force of the elastic body, and do not press the cap 2 any more. Therefore, forcible pushing can be prevented, and the sleeve 1 and the cap 2 are not damaged.

The positioning device according to the present embodiment includes a pair of sleeves 1 mounted on the base 5 and the cap 2 adsorbed by the suction punch 6a and approaching and moving away from the side surfaces of the cap 2 approaching the sleeve 1. Guide plates 8 are provided.
A guide groove 7 corresponding to the shapes of the sleeve 1 and the cap 2 is formed at the tip of the guide plate 8.

Guide groove 7 formed at the tip of guide plate 8
As shown in FIGS. 5A and 5B, a guide groove 7a equal to the outer diameter a of the cap 2 and a guide groove 7b equal to the outer diameter b of the sleeve 1 are formed coaxially. When the cap 2 and the sleeve 1 are held between the guide grooves 7a and 7b, the held cap 2 and the sleeve 1 are positioned coaxially.

As shown in FIG. 5 (A), the guide grooves 7 are formed in a semicircular shape on the left and right guide plates 8, 8, respectively. 2), the cap 2 and the sleeve 1 are completely sandwiched. In FIG. 5B, "16"
Is a groove for deburring when the two guide grooves 7a and 7b are machined, and can be omitted in the present invention.

As specific means for moving the left and right guide plates 8, 8 toward and away from each other, the configuration shown in FIGS. 3 and 4 can be exemplified. In this configuration, the two guide plates 8, 8 are directly or indirectly attached to the slide guide 17, so that the two guide plates 8, 8 can be moved toward and away from the pins 4 provided on the base 5, and the two guide plates 8, 8 can be moved. Are driven by a fluid cylinder 18 via a link mechanism.

That is, the fluid cylinder 18 is mounted on a fixed plate 20 via a bracket 19, and one end of two link bodies 22, 22 is pivotally connected to the tip of a rod 21 of the fluid cylinder 18. .
The two link bodies 22 are attached to a fixed plate (or a fixed plate via another member) 20 by a rotating shaft 2.
When the fluid cylinder 18 is actuated, the two link members 22, 22 rotate in opposite directions about the rotation shafts 23, 23. Guide plates 8, 8 are pivotally connected to the other ends of the link bodies 22, 22, whereby the two guide plates 8, 8 move toward and away from each other with the operation of the fluid cylinder 18.

Next, the operation will be described. When the cap 2 is pushed into one end of the sleeve 1 in the cylindrical body positioning device according to the present embodiment, first, the hollow portion 3 of the sleeve 1 is inserted into the pin 4 of the base 5. At about the same time, the cap 2 is adsorbed on the suction punch 6a, and the sleeve 1 mounted on the base 5 is moved.
Approach.

Next, a pair of guide plates 8 and 8 are attached to the sleeve 1 placed on the base 5 and the cap 2 which is sucked by the suction punch 6a and approached the sleeve 1 from these side surfaces.
And the sleeve 1 and the cap 2 are inserted into the respective guide grooves 7a, 7b formed at the tips of the guide plates 8, 8.
And sandwich each. Thereby, the sleeve 1 and the cap 2 are connected to the guide grooves 7a, 7 formed in the guide plates 8, 8, respectively.
Positioning is relatively performed with the processing accuracy of b.

Finally, with the sleeve 1 and the cap 2 held between the guide plates 8, 8, the suction punch 6 a is further moved closer to the base 5, and the cap 2 is pushed into the sleeve 1. Since the sleeve 1 and the cap 2 are relatively accurately positioned by the guide plate 8, the cap 2 is smoothly pushed into the sleeve 1. Further, since the guide plate 8 moves toward and away from the sleeve 1,
It is extremely easy to take out the work after the cap 2 is attached, and the degree of freedom of application to other assembling devices is increased.

At this time, the suction punch 6a and the housing 6
b, an elastic body is interposed between the guide plates 8, 8
Thus, when the sleeve 1 and the cap 2 are sandwiched and the cap 2 is pushed in from this state, even if an excessive pressing force is applied, it can be absorbed.

Next, a description will be given of a device for assembling a cathode cap using the above-described positioning device. FIG. 2 is a plan view showing an assembling apparatus according to one embodiment of the present invention. In the assembling apparatus of the present embodiment, a plurality of the bases 5 described above are provided,
Index table 9 that rotates at a predetermined tact time
And around this index table 9,
Along the rotation direction of the index table, a cylindrical body supply means 10, a cap supply means 12, a positioning and pushing means 11, and a joining means 14 are provided.

These means 10, 11, 12, 14 are:
The index table 9 is disposed at a position corresponding to the feed pitch. Therefore, the sleeve 1 (sleeve 1 and cap 2 depending on the position) mounted on each base 5 of the index table 9 rotates the index table 9 by one pitch when the processing of the means arranged at that position is completed. And the sleeve 1 (the sleeve 1 and the cap 2 depending on the position) are conveyed to the next means.

The cylindrical body supply means 10 uses a shooter to move the sleeve 1 from a box in which a large number of sleeves 1 are stored.
In this embodiment, one sleeve 1 is supplied to one base 5. Also,
The positioning / pushing means 11 is the above-described positioning apparatus according to the present invention, and the cap supply means 12 supplies the cap 2 to the suction punch 6a of the positioning apparatus 11 from a box containing a large number of caps 2 by a shooter. It is a device to do. Also in this cap supply device 12, one cap 2 is supplied to one base 5. Joining means 14 arranged in the final step
Is, for example, a laser welding apparatus. In the embodiment shown in FIG. 2, three laser welding apparatuses 14 are used to perform three-point welding.
a is provided.

When assembling the cathode cap by such an assembling apparatus for a cylindrical body, it is performed as follows. First, while a plurality of bases 5 provided with pins 4 for inserting the hollow portions 3 of the sleeve 1 are arranged and an index table 9 for sequentially feeding works is rotated at a predetermined feed pitch, first, a cylindrical body supply means 10 is provided. Thus, one sleeve 1 is supplied to one base 5 from the plurality of sleeves 1 so that the hollow portion 3 of the sleeve 1 is inserted into the pin 4 of the base 5.

In the next table, the cap supply means 12
One cap 2 is sucked from the plurality of caps 2 by the above, and the cap 2 is moved closer to the sleeve 1 placed on the base 5 and sent by the index table 9 by the positioning and pushing means 11. Let it.

Then, the guide plate 8 is approached from the side surfaces of the sleeve 1 and the cap 2, and the sleeve 1 and the cap 2 are positioned by the guide grooves 7 a and 7 b formed at the tip of the guide plate 8. The suction punch 6a is moved further closer to the base 5 to put the cap 2 on the sleeve 1
Press The sleeve 1 and the cap 2 are connected to the guide plate 8
As a result, the cap 2 is pressed into the sleeve 1 smoothly. When the cap 2 is pushed into the sleeve 1, the index table 9 is fed, and the joining section 13 (see FIG. 6) between the sleeve 1 and the cap 2 is welded by the joining means 14. Finally, the cathode cap after welding is discharged.

These cylindrical body supply means 10, positioning / pressing means 11, cap supply means 12, joining means 14
Is arranged around the index table 9 at a position corresponding to the feed pitch of the index table, so that a series of processes from supply of the sleeve 1 and the cap 2 to welding can be continuously and automatically performed. Can be.

The present invention can be variously modified without being limited to the above-described embodiment.

[0043]

As described above, in the cylinder positioning device of the present invention, the hollow portion of the cylinder is inserted into the pin provided on the base, and the cap is suctioned by the suction punch to be mounted on the base. A pair of guide plates are approached from the side of the cylindrical body placed on the base and the cap adsorbed by the suction punch and approached to the cylindrical body, and the guide is brought closer to the placed cylindrical body. Since the cylindrical body and the cap are sandwiched in the guide groove formed at the tip of the plate, the cylindrical body and the cap are relatively positioned with the processing accuracy of the guide groove formed in the guide plate. .

Further, since the guide plate moves toward and away from the cylindrical body, it is extremely easy to take out the work after the cap is attached, and the degree of freedom of application to other assembling devices is increased.

At this time, if an elastic body is interposed between the suction punch and the driving unit for moving the suction punch, the cylindrical body and the cap are sandwiched by the guide plate, and when the cap is pushed in from this state. No excessive pressing force is applied.

In the apparatus for assembling a cylinder according to the present invention, the cylinder positioning device described above is arranged around the index table, and the cylinder supply means, the cap supply means, and the joining means are also arranged around the index table. Since it is provided, a series of processing from supply of the cylindrical body and the cap to welding can be continuously and automatically performed.

[Brief description of the drawings]

FIG. 1 is a front view showing a positioning device according to an embodiment of the present invention.

FIG. 2 is a plan view showing an assembling apparatus according to one embodiment of the present invention.

FIG. 3 is a front view showing a specific structure of the guide plate of the embodiment shown in FIG.

FIG. 4 is a side view showing the specific structure of the guide plate, as viewed from the direction indicated by the arrow A in FIG. 3;

FIG. 5A is a plan view showing the structure of the guide plate,
FIG. 5B is a side view taken along the line BB of FIG.

FIG. 6 is a half sectional view showing a cathode cap.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sleeve (hollow cylindrical body) 2 ... Cap 3 ... Hollow part 4 ... Pin 5 ... Base 6 ... Suction punch 7 ... Guide groove 7a ... Guide groove for cap 7b ... Guide groove for sleeve 8 ... Guide plate 9 ... Index table DESCRIPTION OF SYMBOLS 10 ... Cylinder supply means 11 ... Positioning and pushing means 12 ... Cap supply means 13 ... Joining part 14 ... Joining means

Claims (5)

(57) [Claims] 1. A device for positioning a cylindrical body and said cap when pushing a cap into at least one end of a hollow cylindrical body, comprising: a base provided with a pin for inserting a hollow portion of the cylindrical body; An adsorption punch that adsorbs the cap and moves toward and away from the cylinder placed on the base; and a cylinder that is adsorbed by the cylinder and the adsorption punch placed on the base and approaches the cylinder. And a pair of guide plates having guide grooves respectively corresponding to the shape of the cylindrical body and the cap at the tip thereof, and a cylindrical body with a cap. Positioning device. 2. The positioning device for a cylindrical body with a cap according to claim 1, wherein an elastic body is interposed between the suction punch and a driving unit for moving the suction punch. 3. The apparatus for positioning a cylinder with a cap according to claim 1, wherein the cylinder with a cap is a cathode cap constituting an electron gun of a picture tube. 4. A device for assembling a cylindrical body with a cap, wherein a cap is pushed into at least one end of a hollow cylindrical body and the cylindrical body and the cap are joined together, wherein a base provided with a pin for inserting a hollow portion of the cylindrical body is provided. An index table, which is provided with a plurality of tables and sequentially sends a workpiece, is disposed around the index table at a position corresponding to a feed pitch of the index table, and the hollow portion of the cylindrical body is used as a pin of the base. A cylindrical body supply unit to be inserted, disposed around the index table at a position corresponding to a feed pitch of the index table, and with respect to the cylindrical body mounted on the base by sucking the cap. The cap is approached, and the cylindrical body and the cap are positioned by a guide groove formed at the tip by approaching the cylindrical body and the side of the cap. Positioning and pushing means for pushing the cap into the cylindrical body; and a cap disposed around the index table at a position corresponding to the feed pitch of the index table and supplying the cap to the positioning and pushing means. A supply unit, and a joining unit that is disposed around the index table at a position corresponding to a feed pitch of the index table and that welds a joint between the cylindrical body and the cap. Assembling device for cylindrical body with cap. 5. The apparatus for assembling a cylinder with a cap according to claim 4, wherein said cylinder with a cap is a cathode cap constituting an electron gun of a picture tube.