JP3103869B2 - Drum end film peeling device - 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 removing an unnecessary coating film from an end of a cylindrical drum to which a coating is applied.

[0002]

2. Description of the Related Art In coating a cylindrical drum, a masking process is performed on an end of the drum where no coating is required, and then the coating operation is shifted to an original coating operation. When the coating process was completed, the masking was removed.

[0003]

Properly performing a masking operation on each cylindrical drum requires a great deal of effort and time, and the masking must be removed later. The efficiency was so bad. There was an inconvenient situation that more man-hours and time were required for the masking work than for the original coating work. Therefore, even in mass production,
There was a problem that the working efficiency was low and the cost did not decrease.

[0004] The present invention has been made in view of the above-mentioned circumstances, and performs a coating process on the entire cylindrical drum without performing a masking process, and then removes an unnecessary film on the end of the drum. An object of the present invention is to eliminate the above-mentioned conventional problems and achieve cost reduction by peeling.

[0005]

According to the present invention, there is provided an apparatus for peeling off a coating film on a drum end according to the present invention, which has the following structure to achieve the above object. As a premise, a cylindrical drum that has been entirely subjected to a coating process is targeted. The film peeling device includes a solvent bath for containing a solvent for melting the film on the drum, a rotary drive unit for driving and rotating the solvent bath, and a floating blade chuck mechanism mounted in the solvent bath. The upper end of the cylindrical drum is fixed, and the lower end is immersed in the solvent in the solvent tank. The lower end of the drum is clamped by a floating blade chuck mechanism. The axes of the cylindrical drum and the solvent tank are substantially coaxial. The cylindrical drum is fixed and does not rotate, but the floating blade chuck mechanism rotates with the solvent bath.

[0006]

When the floating blade chuck mechanism that clamps the lower end of the drum rotates together with the solvent tank, the blade chuck that rotates along the peripheral surface of the lower end of the drum scrapes the coating on the peripheral surface of the lower end of the drum. The solvent immersed in the lower peripheral surface of the drum weakens the adhesion of the coating. By this synergy, the film on the peripheral surface of the lower end of the drum is peeled off and dissolved in the solvent. Even if the cylindrical drum is slightly tilted or oscillates, since the blade chuck mechanism is a floating type, no excessive force is applied, and the blade chuck mechanism and the solvent tank rotate smoothly.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an apparatus for peeling off a film at a drum end according to the present invention;

FIG. 1 is a partially cutaway front view showing a schematic configuration of the entire film peeling apparatus. 1, reference numeral 1 denotes a fixed frame, 2 denotes a blade chuck opening / closing cylinder attached to the fixed frame 1, 3 denotes an elevating frame which is raised and lowered by the cylinder 2, 4 denotes a fixed frame disposed above the elevating frame 3. Is a fixed support cylinder attached to the fixed frame 4; 6 is a bearing arranged vertically above and below the fixed support cylinder 5; 7 is a rotary cylinder shaft rotatably supported by the upper and lower bearings 6; A pulley spline-fitted to the lower end of 7, a transmission belt 9 wound around the pulley 8, a fixed overflow tank 10, a solvent tank 11 rotatably and liquid-tightly arranged in the overflow tank 10. Reference numeral 12 denotes a supporting cylinder fixed to the bottom of the solvent tank 11. The support cylinder 12 is mounted on the upper end flange of the rotary cylinder shaft 7 and is detachably connected with a screw 13. The transmission belt 9, the pulley 8, the rotary cylinder shaft 7, and the support cylinder 12 constitute a rotation drive unit 14 for driving and rotating the solvent tank 11. Reference numeral 15 denotes a push rod which is inserted into and retracted from the rotary cylinder shaft 7, and reference numeral 16 denotes a bearing for holding the lower end of the push rod 15 to the lifting frame 3.

The solvent tank 1 is provided inside the overflow tank 10.
1 are provided, and the rotation drive unit 14 as described above is provided for each of them. Each rotation drive unit 14 is interlocked and connected via a transmission belt 9.

FIG. 2 is an enlarged sectional view of the solvent tank 11 and the floating blade chuck mechanism 24. In addition,
In FIG. 2, the right floating blade chuck mechanism 2
4 is shown in an open position, and the left floating blade chuck mechanism 24 is shown in a closed position, for the sake of explanation only.

The upper end of the push rod 15 faces the lower end of the cam operating rod 17. The push rod 15 and the cam operating rod 17 are in a state of being cut off. The cam actuating rod 17 is supported by the support cylinder 12 via a bush 18 so as to be slidable in the axial direction. The cam operating rod 17 penetrates the solvent tank 11 from its bottom 11a, and the upper end is located at a position sufficiently higher than the upper edge of the solvent tank 11. From the upper end of the cam operating rod 17 to the solvent tank bottom 11a, a cam operating cylinder 19 is externally fitted and fixed to the cam operating rod 17. A pair of cams 20 for opening and closing the blade chuck are mounted on the flange at the lower end of the cam operating cylinder 19 at 180 degrees apart.

A support pin 21 is implanted in the solvent tank bottom 11 a so as to vertically penetrate the cam 20, and a blade chuck base 22 is provided inside the solvent tank 11 and on the outer periphery of the cam operating cylinder 19. 21 is fixed to the upper end. The cam 20 can be slid up and down with respect to the support pin 21, but the cam 20 is attached downward by a compression spring 23 fitted outside the support pin 21 and interposed between the cam 20 and the blade chuck base 22. It is being rushed. A pair of cams 20
At a position corresponding to each upper part of the blade chuck base 22, a pair of floating blade chuck mechanisms 2
4 are mounted 180 degrees apart.

Each floating blade chuck mechanism 24 includes a pair of arms 25 pivotally supported by the blade chuck base 22, a cam follower 26 rotatably supported at the lower end of each arm 25, and each arm 25. It comprises a blade chuck 27 movably attached to the upper end of the blade 25, and a tension spring 28 spanned between the arms 25 to urge the blade chucks 27 in the closing direction.

The entire surface of the cylindrical drum 100 is previously coated. Originally, the end portions that do not require coating are also coated. The cylindrical drum 100 is vertically erected, and its lower end is immersed in a solvent 29 contained in a solvent tank 11 and a pair of floating blade chuck mechanisms 24 diametrically opposed to each other. Is to be clamped. The upper end of the cylindrical drum 100 is clamped and fixed by a chuck mechanism (not shown). As the cylindrical drum 100, for example, a photosensitive drum in a copying machine can be used.

In FIG. 2, reference numeral 11b denotes a solvent bath 11
An overflow hole 30 is formed in the peripheral wall, and a new liquid hose 30 is shown in FIG.
Is a waste hose connected to the bottom of the container. The solvent 29 is used in circulation, and its circulation system is shown in FIG.

In FIG. 3, reference numeral 40 denotes a base; 41, a clean tank; 42, a dirty tank; 43, a pump for supplying a new solvent to the solvent tank 11 via a new liquid hose 30;
Is a motor for driving the pump 43, and 45 is a dirty tank 4.
Reference numeral 46 denotes a pump for discharging the solvent waste liquid from 2 to a distillation tank (not shown).
47 and 48 are level switches, 49 is an air operated valve,
50 is a check valve, 51 is a strainer, 52 is a check valve, and 53 to 58 are stop valves.

A clean solvent new solution sent from a distillation tank (not shown) is guided to and stored in a clean tank 41, and is driven by a pump 43 by the rotation of a motor 44 to each solvent tank 11 via a new solution hose 30. be introduced. The solvent waste liquid in the overflow tank 10 is guided to and stored in the dirty tank 42 via the waste liquid hose 31, and is sent to the distillation tank by driving the pump 45 by rotation of the motor 46. In the distillation tank, the solvent waste liquid is distilled and becomes a clean solvent new liquid, which is recycled.

The cylindrical drum 100, which has been subjected to various coating treatments in advance, is clamped at its upper end by a chuck mechanism (not shown), suspended in a vertical position, and placed above the solvent tank 11.

By extending the cylinder 2, the push rod 15 is raised via the lifting frame 3, and the upper end of the push rod 15 is brought into contact with the lower end of the cam operating rod 17 to raise the cam operating rod 17. Then, the pair of cams 20 rise together with the cam operating cylinder 19 against the compression spring 23, and push up the cam followers 26 at the lower ends of both arms 25 in each floating blade chuck mechanism 24, and oppose the tension spring 28. To open and swing the arm 25. This opens the blade chuck 27 (see the state on the right side of FIG. 2).

Next, with the cylindrical drum 100 centered on the cam operating cylinder 19, the entire cylindrical drum 100 is lowered, and the lower end of the drum from which the coating is to be removed is inserted between the opened blade chucks 27. And dipped in the solvent 29 in the solvent tank 11.

When the cylinder 2 is contracted from this state,
The force pushing up the cam operating rod 17 via the lifting frame 3 and the push rod 15 is released, and the cam 20,
The cam operating cylinder 19 and the cam operating rod 17 are lowered. When the cam 20 is lowered, the pushing force of the cam 20 against the cam follower 26 is released, and the pair of arms 25 swings to the closing side due to the elastic restoring force of the tension spring 28, and as a result, the pair of blade chucks 27 become cylindrical. The lower end of the drum 100 is clamped (see the state on the left side of FIG. 2).

This clamping is performed at two positions in the diameter direction.

Next, the pulley 8 is rotated by rotating the transmission belt 9 in the rotary drive unit 14, and the rotary cylinder shaft 7, the support cylinder 12, and the solvent tank 11 are slowly rotated via the spring fitting part. Let it. A pair of floating blade chuck mechanisms 24 mounted inside the solvent tank 11 and attached to the solvent tank bottom 11 a via the blade chuck base 22 and the support pins 21 also rotate together with the solvent tank 11. The cylindrical drum 100 does not rotate because it is clamped and fixed at its upper end.

The blade chuck 27 rotates along the peripheral surface of the lower end of the fixed cylindrical drum 100, and the blade chuck 27 rubs the coating on the peripheral surface of the lower end of the drum. On the other hand, the solvent 29 immersed in the peripheral surface of the lower end of the drum weakens the adhesion of the film. When the solvent tank 11 and the floating blade chuck mechanism 24 are rotated several times, the coating on the peripheral surface of the lower end of the drum is gradually peeled off and dissolved in the solvent 29.

Since the blade chuck 27 is pivotally supported on the arm 25 so as to be swingable, the cylindrical drum 100
When the blade is slightly tilted or oscillates, it is absorbed by the swing of the blade chuck 27, so that no excessive force is applied to the blade chuck 27 and the lower end of the drum. Therefore, the floating blade chuck mechanism 24 and the solvent tank 11 rotate smoothly.

Since the new solvent is supplied from the new liquid hose 30 to the solvent tank 11, the solvent 29 which has melted the coating in the solvent tank 11 is supplied from the overflow hole 11b to the overflow tank 1.
0, and the dirty solvent 29 is sequentially discharged.

After rotating the drum by the required number of revolutions to remove unnecessary coating on the peripheral surface of the lower end of the drum as expected, the rotation drive unit 14 is stopped, the cylinder 2 is extended, and the blade chuck 27 is opened. Then, the cylindrical drum 100 is pulled up.

The blade chuck mechanism 24 is structured so as to rotate integrally with the solvent tank 11, and since there is no relative rotating portion between the cam operating rod 17 and the solvent tank 11, a seal, packing, It is possible to adopt a sealless specification that does not require an O-ring or the like, and it is possible to avoid liquid leakage due to swelling, deterioration, cracks, and the like caused by a solvent when the seal specification is used.

There is a possibility that a part of the peeled coating material enters a mechanical part such as the floating blade chuck mechanism 24 and causes a malfunction. In this case, by removing the screw 13 and separating the support cylinder portion 12 of the solvent tank 11 from the flange of the rotary cylinder shaft 7, maintenance such as cleaning of the inside of the solvent tank 11 can be easily performed. Since the push rod 15 and the cam operating rod 17 are cut off, there is no problem in separating the solvent tank 11 from the rotary cylinder shaft 7.

If a large number of blade chuck mechanisms 24 are provided in the solvent tank 11 to perform multi-axis peeling of the drum, the liquid level pulsates due to the influence of other blade chuck mechanisms, and the height of the liquid to be peeled is high. However, in the case of the present embodiment, the blade chuck mechanism is provided as a pair for one of the solvent tanks 11, so that other effects are not required.

Further, since one solvent tank 11 is assigned to one of the cylindrical drums 100, the degree of solvent contamination by the peeled coating material can be made substantially uniform in each tank. Product quality can be stabilized.

[0032]

As described above, according to the present invention, unnecessary coating on one end of a cylindrical drum is peeled off by a blade chuck and dissolved in a solvent. The masking process which is laborious and time-consuming as in the conventional case is unnecessary. The unnecessary coating can be efficiently removed and removed by the blade chuck and the solvent. Therefore, by mass-producing, it is possible to increase work efficiency and reduce costs. Since the blade chuck mechanism is of the floating type, it can absorb the inclination and the runout of the cylindrical drum and can ensure a smooth rotation state. Since the solvent tank is also rotated together with the blade chuck mechanism, the solvent tank can be of a sealless type, and the problem of liquid leakage does not occur.

[Brief description of the drawings]

FIG. 1 is a partially broken front view showing the overall schematic configuration of a drum end film peeling apparatus according to one embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a part of a solvent tank and a floating blade chuck mechanism in the embodiment.

FIG. 3 is a view showing a solvent circulation system of the coating stripping apparatus of the embodiment.

[Explanation of symbols]

 2 ... Cylinder for opening / closing blade chuck 3 ... Elevating frame 5 ... Fixed support cylinder 7 ... Rotary cylinder shaft 8 ... Pulley 9 ... Transmission belt 10 ... Overflow tank 11 ... Solvent tank 12 ... Support cylinder Part 13: Screw 14: Rotating drive part 15: Push rod 17: Cam operating rod 19: Cam operating cylinder 20: Cam 21: Support pin 22: Blade chuck base 23: Compression Spring 24: Blade chuck mechanism 25: Arm 26: Cam follower 27: Blade chuck 28: Extension spring 29: Solvent 30: New liquid hose 31: Waste liquid hose

Continuation of the front page (56) References JP-A-4-162042 (JP, A) JP-A-4-141663 (JP, A) JP-B-2-51501 (JP, B2) (58) Fields investigated (Int) .Cl. ⁷ , DB name) B05C 9 / 12,11 / 10 B05C 3/00-3/109 B05C 13/02 G03G 5/05 102 B05D 3/00

Claims (1)

(57) [Claims] 1. A solvent tank containing a solvent for immersing a lower end of a cylindrical drum which has been entirely coated in advance and melting a coating on the lower end thereof, and a rotary drive unit for driving and rotating the solvent tank. And a floating blade chuck mechanism mounted in the solvent tank , wherein the floating blade chuck mechanism is pivotally supported
Arm and the blade chain attached to this arm
A coating stripper at the end of the drum , wherein the coating strip is rotated integrally with the solvent bath .