JPH07256587A - Attachment of protecting film - Google Patents

Abstract

PURPOSE:To provide a protecting film attachment method in which the attachment of the protecting film for protecting the surface of a cutting plate is carried out easily and correctly, the excellent workability is provided, efficiency is improved through the labor economization and safety is provided. CONSTITUTION:When a protecting film 3 is attached on the surfaces of the cutting plates 1a and 1b which are transferred, keeping a certain interval, at the front and rear parts in the traveling direction, the projecting film 3 having a coil shape is cut to the width which is slightly larger than the width of each cutting plate 1a, 1b, and in rolling-out, the width is reduced until the width coincides with the width of each cutting plate 1a, 1b, by applying brake on the film 3, and then the film 3 is attached on the cutting plates 1a and 1b. Then, the excessive film 3ae which extends between the cutting plates 1a and 1b is cut and removed through the movement in reciprocation in the width direction, in the contact state with the edges of the plate bodies 1a and 1b, by a cutter 8 consisting of four average length cutters 28a-29d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a protective coating for protecting the surface of a plate such as a cutting plate formed of metal, non-metal, wood, etc. The present invention relates to a protective film sticking method which can be preferably applied to continuous automatic sticking of a protective film to a surface of a plate body (hereinafter referred to as a cut plate) such as a plate.

[0002]

2. Description of the Related Art Various cutting plates made of metal, plastic, etc. are often coated with a protective film on their surfaces. This is performed for the purpose of cushioning during punching, lubrication during deep drawing, preventing surface scratches, and preventing injury to workers during handling. Related technology is disclosed in, for example, Japanese Patent Laid-Open No. 55-113525.
Is disclosed in.

A conventional mode of applying a protective coating is schematically shown in FIGS. 20 is a front view and FIG. 21 is FIG.
FIG. 22 is a cross-sectional view taken along the line A-A of FIG. As shown in these drawings, one side surface (one ear portion, left ear portion a in FIG. 21) of the cutting plates 1a and 1b (collectively referred to as reference numeral 1) conveyed on the roller 2 of the roller table. ), The protective coating 3 and the left ear portions of the cut plates 1a and 1b are aligned and attached to each other to form the cut plates 1a and 1b.
As shown in the plan view of FIG. 22, the cut portion of the protective coating 3 attached to the surface is provided with the surplus portion 3af on the right ear side, the cut plate 1a,
It is reduced to the surplus portion 3ae between 1b, and the place where the four-sided cutting is normally performed is reduced to the three-sided work.

[0004]

As shown in FIG. 20, the order of this operation is as follows. As shown in FIG. 20, the surface of the cutting plates 1b, 1a conveyed on the roller table 2 is covered with the protective film 3 through the wrinkle prevention roll 4. The protective coating 3 is pressure-bonded to the surfaces of the cutting plates 1b and 1a by the pinch rolls 5 and the excess protective coatings 3af and 3ae are removed by a blade. in this case,
Although the extra protective coatings 3af and 3ae were removed by a worker using a blade, there is a problem in that the work is unsafe and dangerous. In addition, as shown in the enlarged cross-sections of FIGS. 23 and 24, extra protective coatings 3af and 3ae to be removed at the time of removing work.
Is difficult to cut by using a machine because it is in a free state without being restrained by the surface of the cutting plate, and it must be cut by the blade 6 as shown in an enlarged cross section in FIG. 25 depending on the operator. I had to do it, so it was not only dangerous, but also inefficient. Furthermore, the treatment of the removed protective coating is also cumbersome. It has been attempted to cut the protective film 3 according to the width dimension of the cutting plate before attaching the protective film 3 to the surface of the cutting plate 1, but it is necessary to prevent the cutting plate from meandering. It is difficult to carry and paste the same width to put it into practical use.

On the other hand, a cutting method used for realizing the mechanization of the pasting work has been proposed. This method is a two-step cutting method in which after the protective coating is applied, the excess protective coating on the left and right ears is cut with a cutter, and then the excess protective coating between the plate materials that are the cutting plates is cut with a cutter. , The cutting of the latter stage is a pair of side-by-side cutters,
With the gap between the cutters narrowed, the cutters are inserted into the gap between the plate materials conveyed with a gap in the surface direction, and the cutter is moved to one end of the gap to open the gap between the cutters. The plate material edge which is brought into contact with the edge of the plate material, cuts the protective film between the plate materials up to one end of the gap in the state of being in contact with the edge of the plate material, and is located in the remaining portion of the protective film. Is a cutting method of cutting the remaining portion by bringing the cutter into contact with and moving to the other end of the gap in the contact state.

Even in the above-mentioned cutting method of the prior art, it is not easy to cut the protective coating on the ear portion in the narrow "perpetual" state, and uneven cutting often occurs. Further, when the plate material is meandered and conveyed, there is a problem that not only the two ears but also the protective coating between the plate materials cannot be cut properly along the edge of the plate material.

An object of the present invention is to solve the above-mentioned conventional problems and to easily and accurately attach a protective coating for protecting the surface of a cutting plate, which is excellent in workability and labor saving. It is an object of the present invention to provide a method for applying a protective film which is highly safe and has a high degree of safety due to the improvement of efficiency.

[0008]

According to the present invention, a coil-like protective coating is cut on the surface of a plate such as a cutting plate that is conveyed at regular intervals in the front-rear direction in the traveling direction according to the width of the plate, And in the method of unwinding and continuously pasting, the protective film is cut to a width slightly wider than the width of the plate body, and braking is applied at the time of unwinding so that the width matches the width of the plate body. After applying the protective coating on the surface of the plate, the extra protective coating extending between the front and rear plates is pierced with a pair of blades provided in the front and rear of the plate running direction, Reciprocally move the blade in the width direction while making contact with the edges,
This is a method for attaching a protective film, which is characterized in that the excess protective film is removed by cutting at the same time before and after.

Further, the present invention is characterized in that the coil-shaped protective coating is cut into a predetermined width in the coil-shaped state just before being unwound.

Further, the present invention is characterized in that the protective film unwound from the coil is cut to a predetermined width at a portion of a guide roll provided in front of the attaching roll.

According to the present invention, the blades provided as a pair in front of and behind the plate running direction are symmetrically arranged in front of and behind the plate running direction and right and left in the plate width direction at right angles thereto. Between two flat long blades that include a long blade and have a symmetrical relationship on the left and right, the backs face each other, and the blades face outward, and the blades are opposite to the edges of the front and rear plates. It is characterized in that it is provided so that it can come into contact earlier than the back.

Further, the present invention is characterized in that each of the flat blades is formed of a thin metal plate having elasticity and is capable of elastically contacting the edges of the front and rear plates.

Further, the present invention is characterized in that two flat long blades which are symmetrical to each other on the left and right are provided so as to be inclined in a concave shape so that the blade tips are closer to each other than the blade base.

Further, according to the present invention, two flat long blades are provided on one of the front and rear sides at different levels of the cutting edge with respect to the running surface of the plate, and the flat long blade having the lower cutting edge forms a protective film. It is characterized in that cutting is preceded.

[0015]

According to the present invention, the coil-shaped protective coating is cut to a width slightly wider than the width of the cutting plate prior to being applied to the cutting plate, and then the protective coating is protected by applying braking when unwound. Tension and stretch the coating. Since the width of the protective coating shrinks with this extension, the width of the protective coating can be matched with the width of the cutting plate by appropriately adjusting the relationship between the unwinding amount and the braking force. In this way, the protective coatings having the adjusted widths are aligned and attached to the surface of the cutting plate, and then the protective coating extending between the cutting plates can be simply cut and removed.

Further, according to the present invention, the front and rear plates are moved while the extra protective film extending between the front and rear plates is pierced by a pair of blades provided in front and rear of the plate running direction. The blade is reciprocally moved in the width direction while being in contact with each edge of the body, and the cutting is performed at the same time in the front-rear direction to remove the extra protective coating. In this case, the protective coating that is stretched under tension is cut at the front and rear edges at the same time, so that it can be easily and reliably cut along both edges of the cutting plate.

Further, according to the present invention, the widthwise cutting of the protective film is appropriately performed by a cutter or the like while keeping the coil shape, or is performed at the position of the guide roll in front of the application roll, whereby accurate and meandering is performed. Cutting that does not occur is possible.

Further, a pair of front and rear blades is formed by four flat blades, two on each side of the front and rear, and a cutting action is performed by a pull-cutting method while the blades are in contact with the edge of the cutting plate. Since the cutting is performed, it is possible to cut smoothly, and after cutting, it is possible to cut beautifully along the edge so that there is no uneven portion at all, and beautiful cutting is possible.

Further, according to the present invention, since each of the flat blades is formed of a thin metal plate having elasticity, the protective coating can be accurately aligned with the edge of the cutting plate and cut accurately.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a cutting and sticking apparatus which is an embodiment of the method of the present invention. In FIG. 1, the cut plate 1a is held with its plate surface substantially horizontal and is conveyed with a certain gap in the front and rear in the traveling direction. The transporting device for the cutting plate 1a has the same structure as the conventional one shown in FIG. Referring to FIG. 1, the cut plate 1a is conveyed by the guide roll 2 of the roller table, and the protective coating 3a unwound from the coil-shaped protective coating 3 passes through the guide roll 4 realized by the wrinkle prevention roll. Then, the protective coating 3a is pressure-bonded to the cut plate 1a by the sticking roll 5 made of a pinch roll, and stuck to the surface of the cut plate 1a. The cut plate 1 has a width of 600 to 1250 mm,
Length is 2000-2800mm and thickness is 0.8-3mm
For example, a stainless cold rolled steel plate or the like is used. The protective coating 3 is a film of vinyl chloride or polyethylene glued on one side. For example, SPV (Safety Protect)
A film having a width of 620 to 1280 mm and a thickness of 0.11 mm, which is called ive vynil), is used.

The wrinkle prevention roll 4 is formed of a rubber roll, and a pair of disc-shaped round blades 7 are provided in pressure contact with the rubber roll at a portion near both ends on the axial end side with the protective coating 3a interposed therebetween. By adjusting the interval between both round blades 7, the protective film 3a to be unwound is cut to a width slightly wider than the width of the cutting plate 1a, for example, about 5 mm wider for one ear, and is fed to the pinch roll 5. . The protective coating selvage 3ag cut by the round blade 7 is wound around a winding core and collected as a coating roll 3ah.

In order to accurately determine the positions to be cut by the round blades 7 on the left and right ears, EPC (Edge Positioni
It is desirable to use position control means called "ng control". This is done by receiving the reflected light of the daylight radiated to both the left and right ears and displacing the reel of the roll-shaped protective coating 3 in the width direction so that the received light amount becomes equal to the right and left, thereby performing correct positioning. It is a control means that is realized.

A braking device 10 is attached to the reel 3b of the roll-shaped protective film 3, and a braking force is applied by the braking device 10. Due to the action of this braking force, the protective film 3a that is unwound is the reel 3b of the protective film 3.
A tension is applied between the pinch roll 5 and the pinch roll 5, and as a result, the protective coating 3a is stretched in the longitudinal direction of the unwinding and its width is reduced. In this case, the width of the protective coating 3a can be made equal to the width of the cutting plate 1a by appropriately adjusting the braking force, and as shown in FIG. Cutting plate 1a,
It is attached to the surface of 1b in a state where the widths are equal and overlaps with each other, and there is a surplus spread portion 3ae between the two cutting plates 1a and 1b.

FIG. 3 schematically shows the structure of the braking device 10 in a side view. In FIG. 3, the braking device 10 is provided at one end of the shaft of the reel 3b of the protective film 3. The braking device is the reel 3b of the protective film 3 which is axially supported by bearings.
Disc-shaped brake drum 11 fitted to the end of the shaft 4A of the shaft, a rigid ring 12 fixed to a frame to which bearings are mounted, and provided so as to surround the brake drum 11 concentrically. It is configured to include a drum 11 and a brake shoe 13 provided between the ring 12. The brake shoe 13 has an expandable and contractable structure in which a plurality of elongate tubular bags 14 made of rubber, for example, are connected by a rubber tube 15 to form a hollow chamber that communicates in an annular shape. Are arranged around the brake drum.

When air is pumped into each bag 14 of the brake shoe 13, each bag 14 expands and the brake drum 11
Brake drum 1 in order to spread between the
In contrast to 1, a braking force is generated due to friction. Therefore, braking is applied to the reel 3b of the protective film 3.
In this case, frictional heat is generated in the brake drum 11,
This heat is dissipated in the air pumped into each bag 14 and the water pumped to the brake drum 11, and a cooling action is performed.
In order to release the braking, the air inside each bag 14 should be released,
The contraction of each bag 14 causes the brake drum 11 to rotate without braking.

FIG. 4 schematically shows a cutting and sticking apparatus which is another embodiment of the method of the present invention. The device shown in this figure
Similar to the embodiment shown in FIG. 1, corresponding parts bear the same reference numbers. What should be noted in the apparatus shown in FIG. 4 is that the round blade 7 is provided in pressure contact with a portion of the coil-shaped protective coating 3 near the ears, and the protective coating 3 is provided immediately before being unwound. With the shape as it is, it is cut into a predetermined width slightly wider than the width of the cutting plate 1. The round blade 7 is pressed against the protective coating 3 by a pressing mechanism (not shown), and the circular blade 7 approaches the winding core of the protective coating 3 as the diameter of the coil becomes smaller.

FIG. 5 schematically shows a width cutting device 21 according to an embodiment of the method of the present invention. The width cutting device 21 is provided on the lower side of the cutting and pasting device shown in FIGS. 7 and 10. The width cutting device 21 includes a pair of movable frames 22 that are erected on both sides in the width direction of the cut plates 1a and 1b to be conveyed, and a pair of the movable frames 22 that are integrally forward and backward in the conveyance direction of the cut plates 1a and 1b. Drive device 2 for moving forward and backward
3, a guide member 24 both ends of which are supported by the upper ends of the movable frames 22 and extending in the width direction at right angles to the transport direction of the cut plates 1a and 1b, and a sliding member whose rotation is restricted by the guide member 24. The sliding block 25 is movably attached to the sliding block 25. The driving unit 26 drives the sliding block 25. The cutting unit 27 is fixed to the sliding block 25 and vertically installed.

The cutting portions 27 are provided in pairs before and after the cutting plates 1a and 1b in the traveling direction, and in pairs on the left and right sides in the width direction on the front side and the rear side, respectively, four flat blades 28a to 28d.
A blade 8 formed from the front flat blades 28a, 28b
And a coil spring 29 used to separate the flat blades 28c, 28d on the rear side from each other, and the flat blades 28a, 28b.
And an operation unit 30 realized by an air cylinder that operates against the elastic force of the coil spring 29 in order to reduce the distance between the flat blades 28c and 28d.

FIG. 6 shows a front view of the cutting section 27. 7 shows a front view of the arrangement of the blades 8, and FIG. 8 shows a plan view in section of the arrangement of the blades 8 formed from the four flat blades 28a to 28d. The flat blades 28a to 28d of the cutting portion 27 are opposed to each other with the blade base portions thereof fitted into the groove portions recessed in the bottom portions of the blade mounting portions 31 and 31 with the blade tips facing the running surface of the lower cutting plate 1a. Blade mounting part 31,
The coil spring 29 is provided so as to be sandwiched between 31. The flat blades 28a to 28d are thin metal plate pieces having elasticity,
For example, a steel plate piece forms a sharp blade portion A along one edge in the longitudinal direction, and the tip is obliquely cut so that the blade tip becomes a sharp pointed portion.
The flat blades 28a to 28d are preferably blade portions A such as those used in commercial office and work cutters.
A flat long blade having a structure in which a plurality of fold lines are provided at a constant pitch in parallel with the inclined tip portion from the opposite side to the back portion B is used, and is fitted into the groove portion via a rubber plate.

The flat blades 28a to 28d have a plane including the blade surface perpendicular to the surfaces of the cutting plates 1a and 1b, and the blade portion A is perpendicular to the surfaces of the cutting plates 1a and 1b. The front and rear plate bodies 1 are provided so as to face the left and right outer sides in the width direction.
The plate members 1a, 1b are arranged in the arrangement shown in FIG. 8 so that they can come into contact with the edges of a, 1b earlier than the back portion B.
It is provided so as to have a symmetrical relationship with respect to the center plane orthogonal to the plate body including the traveling center line of b and the width direction plane orthogonal to the center plane.

The operating section 30 is provided with an inverted U-shaped frame 32 provided so as to surround the flat blades 28a to 28d, and a pair of air cylinders 33, 33 provided so as to face both ends of the frame 32. . Air cylinder 33,33
The tip of the piston rod is fixed to the blade mounting portions 31, 31. On the other hand, an operation guide 34 extends parallel to the piston rod, slidably penetrates the blade mounting portions 31, 31, and is mounted on the frame 32. By driving the air cylinders 33, 33 to extend the piston rod, the flat blades 28a, 28b and the flat blade 2 are resisted against the elasticity of the coil spring 29.
The distance between 8c and 28d can be narrowed. On the contrary, by releasing the drive of the air cylinders 33 and 33 to shorten the piston rod, the interval can be expanded by the elastic force.

A driving device 23 for moving the movable frames 22, 22 back and forth is provided slidably penetrating the lower ends of the movable frames 22, 22 and extending parallel to the transport direction of the cut plates 1a, 1b. A pair of guide rods 35, 35, a beam member 36 having both ends fixed to the lower ends of the movable frames 22, 22 and extending in the width direction perpendicular to the transport direction of the cut plates 1a, 1b, and the beam member 36. Of the screw rod 38, which is fixed to one end side of the screw rod 38, a screw rod 38 which is screwed into the nut member 37, extends in parallel with the guide rods 35, 35, and is rotatably provided. The motor 39 is connected to the end of the screw shaft 38 to reversibly rotate the screw shaft 38.

The cut plates 1a and 1b are, for example, 10 m / min.
When the protective coating 3 is cut, the motor 39 is driven in the positive direction in the low speed range, so that the nut member 37 is passed along with the rotation of the screw rod 38. Move forward in the same direction and at a constant speed. Therefore, the width cutting device 21 advances at the same speed as the cutting plates 1a, 1b as the movable frames 22, 22 move forward. When the protective film 3 is cut once by the blade 8, the width cutting device 21 is quickly returned to the first cutting standby device by driving the motor 39 in the reverse direction at a high speed. As described above, the width cutting device 21 includes the cutting plates 1a and 1b.
The width cutting operation can be performed during the passage of the sheet.

9 to 14 schematically show the aspect of the width cutting performed by using the width cutting device 21 which is an embodiment of the method of the present invention. With the four flat blades 28a to 28d narrowed in the front-rear space by the operation of the air cylinders 33, 33, the cutting portion 27 is shown at a position near one ear with respect to the cutting plates 1a, 1b. It is descended in the direction of the arrow F indicated by 13. Protective film spread portion 3ae between the cutting plates 1a and 1b
On the other hand, the blade edges of the flat blades 28a to 28d pierce. In this state, as described above, the width cutting device 21 is moving forward in synchronization with the traveling of the cutting plates 1a and 1b by the operation of the drive device 23.

Next, the front flat blades 28a, 28b and the rear flat blades 28c, 28d are moved in the directions of arrows E and D shown in FIG. , The plates 1a, 1b are brought into contact with the opposite edges, and under this contact, the cutting portion 27 moves forward in the direction indicated by the arrow B in FIG. Along with this movement, a part of the spread portion 3ae is cut by the flat blades 28a and 28c. Then, as shown in FIG. 11, the flat blade 2
When 8a and 28c pass the ears 3aj and 3ai of the protective film 3, the cutting portion 27 is in the opposite direction, that is, the arrow C.
Move back in the direction indicated by. Along with this movement, the long blade 28
b, 28d, the remaining part of the extended portion 3ae is the cutting plate 1.
It is cut along the edges of a and 1b. In this way
As shown in FIG. 10, the spread portion 3ae is cut off, and one stroke of cutting is completed. The cutting unit 27 is moved upward and the width cutting device 21 is returned to the cutting standby position, so that the next cutting can be continuously performed.

FIG. 14 shows flat long blades 28a, 28c for cutting.
Of the flat blades 28a, 28
Since c has elasticity, it flexes elastically when the blade A is in contact with the edges of the cutting plates 1a and 1b, and the protective coating 3 is sandwiched between the flat blade and the cutting plate like scissors. It is possible to cut along the edge exactly because
Even if the cutting plate slightly meanders, the cutting operation can be performed without any problem.

FIG. 15 is an enlarged view showing the arrangement of the blade 8 according to another embodiment of the method of the present invention. In FIG. 15, a pair of flat blades provided on each of the front and rear sides, for example, front flat blades 28a, 28b, have blade portions A separated from the back portions B in the respective cutting directions B, C. The blades are provided so as to face each other and are inclined so that the blade edges are closer to each other than the blade base. In this way, by providing the flat blades 28a and 28b, the cutting operation becomes a state of obliquely cutting, and when moving in contact with the edge of the cutting plate, it moves smoothly and no blade spill occurs. It is advantageous.

FIG. 16 is an enlarged view showing the arrangement of the blade 8 according to another embodiment of the method of the present invention. This FIG.
In, the pair of flat blades provided on each of the front and rear sides, for example, the front flat blades 28a and 28b, are
The feature is that the level of the cutting edge with respect to the running surfaces of a and 1b are provided in a stepped shape. In this way, by providing a step, the flat blade 28a having a lower cutting edge can be used to cut first, and the flat blade 28b having a higher cutting edge to cut the remaining portion after the cutting can be performed smoothly. There is an advantage that it is possible to perform various cutting.

FIG. 17 is a plan view showing a roller table according to an embodiment of the method of the present invention. In addition, FIG.
The front view which follows the BB arrow line in is shown. In order to apply the protective coating 3 fed out through the pinch rolls 5 to the conveyed cutting plate 1a with the same width and with accurate alignment, the running center is always the same so as not to meander the cutting plate 1a. It must be transported while being held in position.

By forming the roll surface of the pinch roll 5 from a material having elasticity such as polyurethane resin or neoprene resin, it is possible to prevent air from being entrained, and the horizontal axis of the roll shaft can be adjusted correctly. By holding the film, the film is stably fed out at a fixed position without causing meandering.

On the other hand, in the roller table provided immediately below the pinch roll 5, the plurality of rollers 2a provided in parallel do not have their horizontal axes at right angles to the running center line of the roller table, but at a slight angle from the right angle. It is provided so as to be inclined at an angle reduced by θ.

In the roller table, a stopper roller 40 is provided between the rollers 2a on the side closer to the same side shaft end of each roller 2a. A shaft of the stopper roller 40 is vertically rotatably supported, and the stopper roller 40 is arranged so that the vertical axis of each roller 40 is included in one vertical plane parallel to the running center line of the roller table.

The operation of transporting the cut plate by the roller table thus provided will be described with reference to the plan view of FIG. Since the force K in the rotational direction of the roller 2a intersects the propulsive force J in the running direction H of the cutting plate, a component force I in the horizontal axis direction of the roller 2a, which is the difference between the two forces, is generated. Force I
As a result, the cutting plate laterally moves to the stopper roller 40 side, comes into contact with the roller 40, and is guided while being guided by its free rotating force. As a result, since the cutting plate 1 is conveyed at a fixed position while being in contact with the roller 40, the cutting plate 1 is always conveyed in a state where the center of travel is kept at the same position without causing meandering. It is possible to surely attach the same width as the plate 1.

[0044]

As described above, according to the present invention, the protective coating is applied before being applied while being applied, and the protective coating is applied to the cut plate while the width is reduced so as to be equal to the width of the cut plate. Therefore, the attachment can be performed easily and accurately. Also, it is not necessary to cut both ears, only the protective coating of the surplus part between the cutting plates can be removed after that,
The work is remarkably simplified. Furthermore, since the excess portion is cut in the width direction at the same time by the blades that are in contact with the respective end edges of the front and rear cutting plates, the film in a tightly restrained state is sandwiched and cut. Therefore, it is possible to reliably cut along the edge of the cutting plate. Thus, by carrying out the method of the present invention, excellent workability, rich in safety, line-up of the sticking device, automation is realized,
It is possible to save labor and improve efficiency.

[Brief description of drawings]

FIG. 1 is an outline elevational view showing a cutting and sticking apparatus according to an embodiment of the present invention.

2 is a plan view of a protective coating applied by the device shown in FIG. 1. FIG.

3 is a side view of a braking device provided in the device shown in FIG. 1. FIG.

FIG. 4 is a schematic elevational view showing a cutting and sticking device according to another embodiment of the present invention.

FIG. 5 is a schematic perspective view of a width cutting device 21 according to an embodiment of the method of the present invention.

FIG. 6 is a front view of a cutting portion 27 shown in FIG.

FIG. 7 is a front view illustrating an arrangement mode of the blade 8 shown in FIG.

FIG. 8 is a cross-sectional plan view for explaining an arrangement mode of the blade 8 of the same.

FIG. 9 is a plan view for explaining the forward operation of width cutting according to the method of the present invention.

FIG. 10 is a plan view for explaining the returning operation of width cutting according to the method of the present invention.

FIG. 11 is a cross-sectional plan view illustrating an operating state of the blade 8 according to the embodiment of the method of the present invention.

FIG. 12 is a plan view showing a sectional view for explaining an operating state of the blade 8 in the same manner.

FIG. 13 is an elevational view which similarly illustrates the operating state of the blade 8.

FIG. 14 is an enlarged elevational view which similarly illustrates the cutting operation of the blade 8.

FIG. 15 is an enlarged partial elevational view of a blade 8 according to another embodiment of the method of the present invention.

FIG. 16 is an enlarged partial elevational view of a blade 8 according to another embodiment of the method of the present invention.

FIG. 17 is a plan view of a roller table according to an embodiment of the method of the present invention.

FIG. 18 is a front view taken along the line BB in FIG.

FIG. 19 is a plan view for explaining the operation of transporting the cutting plate of the roller table shown in FIG.

FIG. 20 is a schematic elevational view showing a conventional protective coating device.

21 is a sectional side view taken along the line AA in FIG.

22 is a plan view of a protective coating applied by the device shown in FIG.

23 is an enlarged cross-sectional view of a cut portion of the protective coating 3af in FIG.

FIG. 24 is an enlarged cross-sectional view of a cut portion of the protective coating 3ae in FIG.

FIG. 25 is an enlarged cross-sectional view showing a cut state corresponding to FIG. 23.

[Explanation of symbols]

 1a, 1b Plates such as cutting plates 3 Protective coating 3b Reel 4 Guide roll 5 Pasting roll 7 Round blade 8 Cutting tool 10 Braking device 11 Brake drum 12 Ring 13 Brake shoe 21 Width cutting device 23 Driving device 27 Cutting part 28a-28d Flat length Blade 40 Stopper roller A Blade B Back

Claims (7)

[Claims] 1. A coil-like protective coating is cut on the surface of a plate such as a cutting plate that is conveyed at regular intervals in the front-rear direction of the traveling direction according to the width of the plate, and is unwound and continuously wound. In the pasting method, the protective coating is cut to a width slightly wider than the width of the plate, and braking is applied at the time of unwinding to attach the protective coating on the surface of the plate so that the width matches the width of the plate. After that, pierce the extra protective coating that spreads between the front and rear plates with the pair of blades provided in the front and back of the plate running direction, and touch each edge of the front and rear plates. A method for applying a protective coating, which comprises reciprocating a blade in the width direction, cutting the blade at the same time before and after, and removing an extra protective coating. 2. The method of attaching a protective coating according to claim 1, wherein the coil-shaped protective coating is cut into a predetermined width in the coil-shaped just before unwinding. 3. The method for applying a protective film according to claim 1, wherein the protective film unwound from the coil is cut into a predetermined width at a position of a guide roll provided in front of the applying roll. 4. The blades provided as a pair in front of and behind the plate traveling direction are four long blades symmetrically arranged in the front and rear of the plate traveling direction and right and left in the plate width direction at right angles thereto. Including the two flat long blades that are symmetrical to the left and right, the backs face each other, and the blades face oppositely to the outside, and the blades are more than the backs with respect to the edges of the front and rear plates. The method for attaching a protective film according to claim 1, wherein the method is provided in a position where the protective film can be brought into close proximity. 5. The protection according to claim 4, wherein each of the flat blades is formed of a thin metal plate having elasticity and is capable of elastically contacting the edges of the front and rear plates. Coating method. 6. Two flat long blades which are symmetrical to each other on the left and right,
The method of attaching a protective film according to claim 4 or 5, wherein the blade tips are provided so as to be inclined in a concave shape so as to be closer to each other than the blade base. 7. The front and rear sides are provided with two flat blades at different levels of the blade edge with respect to the running surface of the plate body, and the flat blade having a lower blade edge cuts the protective film first. 7. The method for applying a protective film according to claim 4, 5 or 6, wherein