JP3233312B2 - Funnel nabin cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting nabin of a cathode ray tube funnel.

[0002]

2. Description of the Related Art As shown in FIG. 3, an excess portion (3a) (hereinafter referred to as "nabin") is generally formed in a neck portion of a press-formed funnel (3). Nabin (3a) needs to be cut and removed. Normally, the cut line (AA) at this time is set with reference to a reference line (BB) defined in the area of the yoke mounting portion (3b).

FIG. 4 shows the basic configuration of a conventional nabin cutting apparatus (see Japanese Patent Publication No. 33-8679). This device horizontally supports the funnel (3) with the support member (66),
The nabin (3a) is sucked by the suction tray (67), and the support member (6
The funnel (3) is blown by the burner (63) while the funnel (3) is rotated synchronously by the frictional force between the bearing (66) and the bearing member (66).

[0004]

SUMMARY OF THE INVENTION In a conventional cutting device,
At the time of heating by the burner, the funnel is rotated in order to make the heating area uniform, but when the funnel is rotated in this way, a particularly heavy funnel such as a large one or a horizontally long one (for high definition) is cut. In this case, there is a drawback in that the apparatus is liable to cause backlash or the like, so that the reference line cannot be accurately positioned, and the cutting position accuracy of the nabin cut line defined based on the reference line is reduced. In addition, in order to rotate a heavy object with a large size, it is necessary to increase the torque of a motor and the like and the rigidity of a support structure of the rotary table, and the size of the apparatus cannot be avoided. Further, there is a possibility that a frictional force acts between the funnel and the support member due to backlash of the device, and the funnel is damaged.

Accordingly, the present invention improves the cutting position accuracy of a cut line when cutting a large funnel or a horizontally long funnel into a nabbin, prevents the apparatus from being enlarged, and also prevents damage to the funnel during cutting. It is an object of the invention to provide a funnel nabin cutting device.

[0006]

In order to achieve the above object, the present invention is an apparatus for cutting nabin of a funnel, which lifts and lowers the funnel with its large-diameter opening face downward. A platform, elevating means for raising and lowering the elevating platform, a fixed guide fixedly disposed above the elevating platform, and engaging with a funnel when the elevating platform is raised to perform positioning of the funnel; and a fixed guide positioned by the fixed guide. A rotary burner rotatably provided at a position facing the nabin side of the funnel, and a rotary drive source for rotating the rotary burner about the axis of the funnel.

[0007]

The funnel is positioned by raising the elevator and engaging the funnel with the fixed guide. In this state, when the rotary burner provided at a position facing the nabin side of the funnel is rotated around the axis of the funnel, the funnel is uniformly heated in the circumferential direction, so that it is preferable to not rotate the funnel. Cutting work can be performed. At this time, since both the funnel and the fixed guide are stationary, the position of the reference line serving as the reference for the nabin cutting position is accurately held, and the positional accuracy of the cut line is improved. Since the rotary drive source only needs to rotate the rotary burner, the size of the apparatus can be reduced. Further, since both the funnel and the fixed guide are stationary, damage to the funnel does not matter.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a side view showing the entire configuration of a funnel nabin cutting apparatus, and FIG. 2 is a plan view thereof.
The apparatus of the present invention comprises: a lifting platform (17) for supporting the funnel (3) with its large-diameter opening surface (3c) facing downward; a lifting unit (25) for lifting the lifting platform (17); The funnel (3) is centered by engaging with the yoke mounting portion (3b) of the funnel (3) when the lift (17) is lifted. 3) A fixed guide (29) for positioning the reference line (BB) and a rotatable position facing the nabin (3a) side of the funnel (3) positioned by the fixed guide (29). Rotary burner provided (3
1) and a rotary drive source (40) for rotating the rotary burner (31) about the axis of the funnel (3).

[0010] The funnel (3) carried into the main body (2) is conveyed rightward in the drawing by the conveyors (16) arranged in a double row. A sensor (not shown) for detecting passage of the funnel (3) is provided at the start end of the conveyor (16), and an output signal of this sensor is input to a control device (not shown). The control device stops the transport conveyor (16) after a certain period of time has passed after detecting the passage of the funnel (3), and positions the funnel (3) immediately below the fixed guide (29).

Below the stop position of the funnel (3),
An elevator (17) is provided. This elevator (17)
As shown in FIG. 2, the rollers (18) of the conveyor (16)
It is composed of a plurality of support members (19) arranged in a gap therebetween and a coupling member (20) for integrally connecting the support members (19). Below the lifting table (17), a numerically controllable rotation source for lifting (22), a ball screw (23) and a ball nut (2
Elevating means (25) consisting of 4) is provided. The elevating rotation source (22) is composed of, for example, a servomotor with a speed reducer. The output shaft of the elevating rotation source (22) is connected to a ball screw (23) via a transmission (26) such as a toothed belt. ). The ball nut (24) screwed with the ball screw (23) is mounted on the lift (17). With such a configuration, when the elevating rotation source (22) is rotated forward / reversely, the elevating table (17) moves up and down, and when the elevating table (17) is raised, the support member (19) moves the conveying conveyor (16). Compete above the transport surface to support the funnel (3).

A fixed guide (29) made of carbon and having a through hole (28) in the center is mounted on the upper wall (2a) of the main body (2). The inner diameter surface of the fixed guide (29) is formed in a truncated cone shape so as to center the nabin (3a) by surface contact with the yoke mounting portion (3b) of the funnel (3). Activate the rotation source (22) for lifting and lowering the table (17)
Is raised, the nabin (3a) of the funnel (3) supported by the lifting platform (17) is inserted into the through hole (2) of the fixed guide (29).
8) and project above the fixed guide (29). Next, the yoke mounting portion (3b) comes into contact with the inner diameter surface of the fixed guide (29), and the funnel (3) is accurately positioned.

A rotary burner (31), a cut wheel (32) and a nabin chuck (33) are arranged on the upper wall (2a) of the main body (2).

The rotary burner (31) is mounted on the lower end of the support shaft (35). Injection hole (31a) of rotary burner (31)
When the rotating burner (31) is lowered as described below,
The injection hole (31a) is provided at a position facing the nabin (3a) side of the funnel (3) positioned by the fixed guide (29). Draw a circular motion slightly larger than the diameter. The support shaft (35) is rotatably supported by a bearing cylinder member (37). The bearing cylinder member (37) is vertically movably supported by a support column (36) fixed to the upper wall (2a), and the upper end thereof is a piston rod of a rotary burner elevating air cylinder (38). (38a). An output shaft of a rotary drive source (40) (comprising a servomotor or the like) is connected to a support shaft (35) in the bearing cylinder member (37) via an appropriate gear mechanism (39). A connecting portion between the support shaft (35) and the gear mechanism (39) has a serration structure to allow relative movement of the both in the vertical direction. With such a structure, the rotary burner (31) is driven by the rotary burner lifting / lowering air cylinder (38) to perform a vertical movement, and is driven by a rotary drive source (40) to rotate about the axis (X). Perform a rotating motion.
The axis (X) is on an extension of the axis (X ′) of the funnel (3) positioned by the fixed guide (29).

The cut wheel (32) is mounted on a cutter table (43) connected to a slide air cylinder (42). This cutting wheel (32)
It is located on the same plane as the cut line (AA: see FIG. 3) of the funnel (3) positioned according to 9).

The nabin chuck (33) is provided with a motor (4
According to 5), it is configured to be pivotable about the axis (Y) on the horizontal plane. The nabin chuck (33) passes above the through hole (28) of the fixed guide (29) and the nabin chute (46) during the turning.

The operation of the rotary burner (31), cut wheel (32) and nabin chuck (33) will be described below. The funnel (3) is brought into contact with the inner diameter surface of the fixed guide (29) and the yoke mounting portion (3b) of the funnel (3).
When the positioning is completed, the rotary burner elevating air cylinder (38) and the rotary drive source (40) are activated, and the rotary burner (31) is lowered while rotating. When the injection hole (31a) of the rotary burner (31) reaches a position facing the cut line of the funnel (3), the descending movement of the rotary burner (31) is stopped, and the cut line is rotated while rotating the rotary burner (31). Heat nabin (3a) along. After the heating is completed, the rotary burner (31) is raised, and the nabin (3a) is clamped by the nabin chuck (33). Then
The slide air cylinder (42) is advanced, and the cut wheel (32) is brought into contact with the cut line of the funnel (3) to chill cut the heated portion. After the cutting is completed, the cut wheel (32) is retracted to the initial position, and at the same time, the nabin chuck (33) is turned to just above the nabin chute (46) to discharge the nabin (3a) into the chute (46).
Further, the elevator (17) is lowered to place the funnel (3) on the transport conveyor (16), and the transport conveyor (16)
And transport the funnel (3) to the next step (graining step, etc.) on the right side of the drawing.

As described above, according to the present invention, the rotary burner (3
Since 1) is rotated to cut the nabin (3a), various problems caused by the rotation of the funnel (3), which has conventionally been a problem, can be solved. Specifically, even when processing a large or horizontally long funnel, it is not necessary to increase the torque and rigidity of the rotary drive system, and it is possible to avoid an increase in the size of the apparatus. Further, since both the funnel (3) and the fixed guide (29) are stationary, no friction occurs between the two members (3) and (29), and there is no problem such as damage to the funnel (3). .

On the other hand, a lifting / lowering table (17) for supporting the funnel (3) can be numerically controlled by a lifting / lowering rotary source (servo motor).
Driven by (22), the lifting table (17) and the rotation source for lifting (22) were connected by the ball screw (23) and the ball nut (24). If you memorize it, you can adjust the vertical stroke with one touch even when changing the size. Further, a smooth lifting operation can be ensured in the entire lifting range.

[0020]

According to the present invention, since the funnel is positioned and fixed at a fixed position, and the rotary burner is rotated to cut the nabin, the accuracy of the cutting position of the cut line of the nabin can be improved. Since the driving source only needs to rotate the rotary burner, the driving source can be reduced in size and the device can be prevented from being enlarged. Further, since the funnel and the fixed guide are stationary, there is no friction between both members due to backlash, and there is no problem of damage to the funnel.

[Brief description of the drawings]

FIG. 1 is a side view showing a nabin cutting device of the present invention.

FIG. 2 is a plan view of a transport conveyor.

FIG. 3 is a longitudinal sectional view of a funnel before nabin cutting.

FIG. 4 is a longitudinal sectional side view of a conventional nabin cutting device.

[Explanation of symbols]

 3 Funnel 3a Nabin 17 Elevating table 22 Elevating rotation source 23 Ball screw 24 Ball nut 25 Elevating means 29 Fixed guide 31 Rotating burner 40 Rotation driving source

Claims (1)

(57) [Claims] 1. An apparatus for cutting nabin of a funnel, comprising: a lifting platform for supporting the funnel with its large-diameter opening face downward; lifting means for lifting and lowering the lifting platform; and the lifting platform. A fixed guide that is fixedly disposed above and engages with the funnel when the elevating platform is raised, and that is rotatably provided at a position facing the nabin side of the funnel positioned by the fixed guide. And a rotary drive source for rotating the rotary burner about the axis of the funnel.