JPS5810356A - Positioning device for bulb of cathode-ray tube - Google Patents

Abstract

PURPOSE:To perform positioning of a bulb, which is carried out before an explosion- proof band is attached around the circumference boundary between the face and the funnel of the bulb, by moving the bulb by two stages by use of two positioning devices. CONSTITUTION:When an upper positioning device 10 is located at the upper dead point, a bulb 4 is inserted between pins 16 so as to make the bulb 4 to be applied to a stopper 18 and adsorbed by adsorbing pads 15. On the other hand, a metallic fixture is temporarily attached to the metallic-fixture supporting part of a band fastening stand 19. Next, when the bulb 4 moves down close to the lower dead point, a neck 3 is inserted into a bulb supporting ring 21 of a lower positioning device 12 which is waiting under the bulb 4, and after that, a funnel 2 is inserted into the ring 21. At this point, if the central line of the bulb 4 doesn't correspond to the central line of the ring 21, a movable table 20 is moved by the neck 3 during the insertion of the bulb 4 so that the central lines of the bulb 4 and the ring 21 correspond. After that, when the bulb 4 moves down to the lower dead point, the position of the bulb 4 is detected with a limit switch 36 which detects the location of a part of a supporting lever 26 which is connected to the ring 21 and extends downward from the ring 21, and the movable table 20 is fixed by moving down a brake lever 23.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a pulp positioning device used when an explosion-proof band is fastened to the outer circumferential surface of the pulp face and the funnel.

In general, the pulp of an explosion-proof cathode ray tube consists of a face part [1] that becomes the image surface, a trumpet-shaped seven-channel part (21), and a small-diameter cylindrical neck part (3), as shown in Figures 1 and 2. With this pulp H positioned and held, the boundary outer circumferential surface (l
n) with the L-shaped mounting brackets (5), (6)...1i! A V-made explosion-proof band (6) is wrapped around it and then fastened. For positioning in the assembly process of the pulp (4), it is possible to obtain good results in terms of stability and accuracy by using the boundary outer circumferential surface (m) with good linearity as a positioning reference surface. In other words, since the band (6) is fastened at a distance of l1llild from the tip end surface of the face portion +1+, for example, the device ζ1 as shown in FIG.
゛ is used to position the pulp (41. This is the pulp (
The face part (1) of 4) is held by vacuum suction with a suction vat (7), and the pulp (4) is placed on the positioning table (8).
The pulp (4) is inserted into the positioning hole (9) of the boundary outer peripheral surface (→, the tip of the width d
). Then, the band (6) is fastened to the rear end portion of the boundary outer peripheral surface (m) protruding from the positioning hole (9) with respect to the positioned pulp [4i].

By the way, since the face portion 1+) of the explosion-proof cathode ray tube above protrudes from the mounting bracket (5) by a width d, when installing it in a cabinet, a special spacer must sometimes be interposed between the cabinet and the h-shaped bracket (6). There are problems such as not being possible.

Therefore, in recent explosion-proof cathode ray tubes, as shown in FIG. V, a reinforcing band (6) is often fastened to the front end portion of the outer peripheral surface of the seven-hole portion (1) of the pulp (4). However,
In the case of the type shown in Figure 7, when positioning the pulp (4), since the mounting bracket is in the opposite direction, the mounting bracket cannot be inserted using the conventional method shown in Figure 3. There was a problem that the positioning of the pulp could not be performed and the band fastening state became unstable, so there was a need for an effective positioning device for this type of pulp.

The present invention satisfies the above-mentioned needs and provides an apparatus that uses two positioning mechanisms to move and position pulp in two stages. The present invention will be explained below with reference to Examples.

In FIG. 5, (101 is an upper part lie/determining mechanism,
(11) is a fixed base disposed at a fixed position below the upper positioning mechanism (101), and (I2) is a lower positioning mechanism placed slidably in the horizontal direction on the fixed base (11). The upper positioning mechanism (101 is the cylinder 03 fixed in a fixed position) and the lifting plate 0 that moves up and down as appropriate with the cylinder (+3)
4), a suction vat t)5) protruding from the lower surface of the lifting plate θ4), a pulp positioning bin 0 (9), and a stopper Qη. This device is used to hold the pulp (4) suspended with the neck part (3) facing down by vacuum suctioning the process part fil appropriately. Two suction bats are placed in the 0th position of the suction vat, and these pins (14 and suction knot θ5) are inserted manually from below to adsorb the pulp (4) on the boundary outer peripheral surface (m). The pulp (4) is positioned by this.

Also, when the stopper Oη hits the negative side of the boundary outer peripheral surface (,n) of the pulp (4) positioned by the pin (16), the limit switch Q~ provided on the inner surface of the stopper (Iη) turns ON.
#The suction vat θ is vacuumed, and the pulp (4) is thereby suctioned and held in a positioned state. Positioning and suction retention of such pulp (4) 4
+? is carried out at the top dead center position of the lifting plate 04), and the pulp (
4) Confirmation that is completely adsorbed and held
41 descends.

The lower positioning mechanism 0 is placed between the fixed base (1) and the band fastening base installed at a fixed position above the fixed base (1), and the next movable table 4, pulp holding ring υ, suction pan ) C22 and brake lever (rotation)). The movable tables have a free-moving roller attached to the lower end and a plurality of legs protruding from the lower surface that have a slight push pin function in the vertical direction. It is placed so that it can be slid laterally with the handle. The pulp retaining ring Ht- is fitted and attached to a fixed position above the center of the movable table through a support rod, and the attachment between the 7-hole part (2) of the pulp (4) and the neck part (3) is It has a donut shape that comes into contact with the root part, and the receiver plays the role of a seat. Also, the suction pan) (24 is a spring (inserted and fixed through two stations) to a plurality of support arm rails η fixed on the movable tape, and these suction bats (two suction bats are each oriented inward at a constant elevation angle). The funnel part (2) of the pulp (4) inserted into the pulp holding ring (4) is vacuum-adsorbed as appropriate. The vertical movement of this brake rod (23
A disc-shaped play plate 1 that protrudes above the movable tee 7' is attached to the upper end of the brake plate (1).
301 is separated from the movable table C20, and when the cylinder cylinder is operated during the positioning operation of the pulp (4) and the brake lever A is lowered, the brake plate (the scoop is moved to the movable table C20).
The movable table 4 is fixed to the fixed base (river) by pressing onto the lower positioning mechanism (the position where the 7th floor part +1+ of the pulp (4) held in the country is attached). For example, it has a curved inner circumferential surface (31) as shown in FIG. A lever 3) is attached, and this opening/closing lever (33) is driven by a cylinder (34).

In addition, on the band fastening table QDj, a mounting bracket (
5) A mounting bracket holding section 13 is installed to temporarily hold the.

Next, the pulp positioning operation and band fastening operation using the t-shape will be explained. As shown in Fig. 5, with the upper positioning mechanism 11O) at the top dead center, move the pulp (4) from the 7th section m to the upper positioning mechanism (+01 pin Q (2)). Insert the pulp between the holes and place it against the stopper 0 to attract it to the suction vat (15).Meanwhile, before and after this pulp positioning operation, the mounting bracket holding part (19) of the band fastening table (19)
Temporarily attach the mounting bracket (5) to the hook. Next Busy Barg (4
) after confirming the positioning and safety of the manual switch.
With N, lower the lifting plate 041 of the upper positioning mechanism (stage) together with the pulp (4) and remove the stone. When the pulp (4) descends to near the bottom dead center, the lower positioning mechanism (
First, attach the neck part (3) to the pulp retaining ring Qzt) of I2).
) is inserted, followed by the funnel part (2). At this time, if the center line of the pulp (4) and the center line of the pulp holding limber 1) are misaligned, the movable table Liu is driven by the neck (3) when inserting the pulp so that both center lines coincide. The lower positioning mechanism t121 holds the pulp determined by the upper positioning mechanism (10).
4) to move and position. Then, as shown in the figure, the pulp (4) is further lowered and the pulp retaining ring H is connected to the suction nozzle e22) in the funnel part (2).
When the pulp (4) reaches the bottom dead center by slightly pressing down, this position is detected, for example, by detecting the position of the downward extension of the support rod row of the pulp retaining ring or by using the (to) of the kit switch. With this detection signal, the suction bat (
7! The funnel part (2) of the pulp (4) is vacuum-adsorbed with η, and the movable table is fixed by lowering the brake lever. Next, the vacuum suction of the upper positioning mechanism (suction vat θ6 of 1'4) is stopped, and the entire assembly is raised to the original top dead center position as shown in FIG. 2, and is placed on standby for positioning the next pulp.

In this way, it is possible to fasten the band to the front end of the boundary outer peripheral surface (m) of the pulp (4) that is positioned and held by the lower positioning mechanism (Fig. 10 to 1J). The process is carried out according to the procedure shown in the figure.First, as shown in Figure 1, a long band (6) is attached to the curved inner circumferential surface of the band fastening table α from one open end to the other open end. Insert along the facing. This band (6) is attached to the mounting bracket (5)
and the curved inner circumferential surface (31), and between the opening/closing lever in the open state and the fixed electrode. Next, as shown in the first problem, close the three opening/closing levers 03) and hand (6).
)) Hold firmly with the opening/closing lever and the fixed electrode. Then, a voltage is applied to each fixed side I2 and the voltage is applied to each fixed side I2.
), heat and stretch the band (6). When this electricity is completed, open the opening/closing lever as shown in Figure 7.2, and the band (6) heats up and stretches it. 6)
The external band is wound by a machine (not shown) and wrapped around the outer boundary surface (→) of the face part tl+.At this time, the mounting bracket (51) moves together with the band (6) and wraps it around the outer boundary surface of the face part tl+. (,).Also, while the band (6) is not cooled, fix the tip of the band (6) and the part that overlaps with this tip, then cut and separate the remaining part, and then As shown, a single band (6) is wound around the boundary outer circumferential surface (m).When this wound band (6) is cooled, the band (6) has a residual strain stress and is wound around the boundary outer circumferential surface h. ) is strongly tightened and is fixed as it is. When the band tightening is completed in this way, the lower positioning mechanism 112) is returned to its original state, the pulp (4) is taken out, and the next pulp (4) is positioned and the band tightening operation is performed. Move to.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the upper and lower positioning mechanisms (+o+(l) can be modified in various ways. For example, to attach the pulp to the cavity on the outer circumferential surface of the face, wrap a band around it, maintain that state, and then tighten the band around the outer circumferential surface of the face.This enables highly accurate and stable pulp positioning. Furthermore, there are no restrictions on the position of attaching explosion-proof bands to the outer peripheral surface of the boundary, making it possible to develop methods for assembling potash and cathode ray tube pulp.

[Brief explanation of the drawing]

Figures @/ and @2 are a partially sectional side view and front view showing an example of an explosion-proof cathode ray tube, Figure 3 is a schematic cross-sectional view of a conventional pulp positioning device, and Figure 2 is a different type of explosion-proof cathode ray tube. Figure J is a partial cross-sectional side view showing an embodiment of the present invention, Figures 1 and 2 are partial cross-sectional side views during each operation to explain the operation of the Figure 5 device. , Figures 1 and 2 are a bottom view and a top view taken along line I-I and line ■-■ in Figure J,
Figures 1θ to 1J are plan views during each operation to explain the band fastening operation in the first cause.
)... Pulp, (107... Upper positioning mechanism, (11
)...Fixing base, (121...Lower positioning mechanism. (11) Fig. 10 6 Fig. 12 265

Claims (1)

[Claims] ft) A vertically movable bottom positioning mechanism that adsorbs the 7th part of the pulp to position and hold the pulp, and a fixed table that is placed at a fixed position below the bottom part pupil setting mechanism and is placed so as to be slidable laterally. The cathode ray tube is characterized in that the cathode ray tube is provided with a lower positioning mechanism that holds the pulp that has descended together with the upper positioning mechanism and reached the bottom dead center by adsorbing the funnel part, and is temporarily fixed to the fixing base as appropriate. Pulp positioning device.