JP5292162B2 - Method for manufacturing end protection cover for coil packaging - Google Patents

Description

  The present invention is an end used for protecting both ends of a packaged coil-shaped material when packaging a coil-shaped material such as a metal wire or an iron plate, such as a steel product wound in a coil shape. It is related with the manufacturing method which bends and manufactures the bending part of a part protection cover.

  Conventionally, when packaging coiled items such as metal products such as metal wires and steel plates, such as steel products wound in a coil shape, a long protective cover is sequentially folded around the end surface of the coiled item. Next, both sides of the coiled material are covered with side plates, and then the peripheral surface of the coiled material is covered with a belt-like sheet in the longitudinal direction to wrap the entire coiled material.

  However, the sheet, protector, and side plate, which are the packaging materials in this case, are all made of paper, and cracks and tears occur in the sheet and protector that cover the peripheral edges of both ends of the packaged coil. The problem is that the coil is bare and rust is generated on the bare coil.

  Therefore, in order to solve such a problem, the applicant of the present patent application has applied for patents such as the following Patent Documents 1 and 2, and both have been patented. The inventions according to Patent Documents 1 and 2 relate to an end protection cover of an iron plate winding coil, and the end protection cover includes a strip-shaped protection cover body made of a synthetic resin and a longitudinal direction of the protection cover body. It is comprised from the several bending piece integrally arranged in parallel along the side edge.

  And when packing an iron plate winding coil, the protective cover main body of an end part protection cover is wound along the circumferential direction of the one end part peripheral surface of an iron plate winding coil, and each bending piece is then made into an iron plate winding coil. Are bent in a direction perpendicular to the protective cover body, covering the end surface of the iron plate winding coil, and protecting the peripheral surface and end surface of one end of the iron plate winding coil.

  However, such an end protection cover has a long protective cover body made of a synthetic resin when the band-shaped protection cover body is bent along the circumferential direction of the peripheral surface of the one end of the iron coil. It has a restoring force, and as a result, it is difficult to bend, and it is difficult to make the entire surface of the protective cover main body uniformly contact with the peripheral surface of one end of the iron coil.

  In the invention according to Patent Document 1, such a problem is solved by making a through hole in the protective cover body or the bent piece. In the invention according to Patent Document 2, the protective cover body and the bent piece are However, from the viewpoint of maintaining the strength of the entire end protection cover, it is better not to form such through holes and cuts. is there.

  Furthermore, such an end protection cover must be prepared in advance with a fixed size that matches the circumference of the end of the winding coil, and when there are multiple winding coils to be wrapped. Since it is necessary to prepare the end protection covers corresponding to the number by cutting them into predetermined dimensions in advance, it is impossible to rationally manufacture such end protection covers. In addition, it is necessary to load and transport the end protection covers having predetermined dimensions in multiple stages one by one at the site, and such work is troublesome.

Japanese Patent No. 309136 Japanese Patent No. 3515528

  The present invention has been made to solve such problems, and can easily bend the folded piece with respect to the main body of the protective cover. Further, the present invention can reduce the circumferential dimension at the end of the coiled object. Prepare end protection covers with a fixed size according to the number of coiled objects to be wrapped, and eliminate the need to load, transport and store them one by one in the field. It is an object of the present invention to provide a method for manufacturing an end protective cover for coil packaging, which can be manufactured continuously.

The present invention has been made to solve such a problem, and in order to protect an end portion of a coiled product to be packaged when the coiled product wound in a coil shape is packaged with a packaging material. A method of manufacturing an end protection cover to be used, which is a long and flat plate-like shape in which a large number of bent pieces are continuously provided across one notch on one side edge in the longitudinal direction of a long protective cover sheet. the end protective cover, winding the steps to pull out from the state of being taken, a step of Ru bent against said end bent pieces an elongated protective cover sheet of protective cover, the bent piece elongated A long-sized end protection cover that is bent with respect to a protective cover sheet is cut to a predetermined size to produce a fixed-size end protection cover in which bent pieces are bent and connected to the protective cover body. to include a step, said end portion protective cover sheet bent piece elongated protective cover The bending step further presses the bent piece and the long protective cover sheet inwardly so that the bent piece and the long protective cover sheet form a predetermined angle. The first pressing step, and the bent piece and the long protective cover sheet so as to form an angle smaller than the angle formed between the bent piece and the long protective cover sheet in the first pressing step. The manufacturing method of the edge part protection cover characterized by including the 2nd press process which presses mutually mutually inwardly is provided.

  Further, in the step of bending the bent piece of the long end protection cover with respect to the long protective cover sheet, in the second pressing step, apart from the first pressing step and the second pressing step. A third pressing step of pressing the bent piece and the long protective cover sheet inwardly to form an angle smaller than an angle formed between the bent piece and the long protective cover sheet. Further can be included.

  As means for pressing each other inward so that the bent piece and the long protective cover sheet form a predetermined angle, for example, a convex roller formed with an outer peripheral surface protruding in a substantially V shape, The outer peripheral surface is recessed in a substantially V shape so as to be fitted to the outer peripheral surface of the convex roller, and is pressed by passing between the concave rollers arranged to face the convex roller. Means can be employed.

  In the present invention, as described above, when a coiled product wound in a coil shape is packaged with a packaging material, the end protective cover used for protecting the end of the packaged coiled product is manufactured. A long and flat end protection cover having a large number of bent pieces continuously provided on one side edge in the longitudinal direction of a long protective cover sheet across a notch. The folded piece of the end protection cover is bent with respect to the long protective cover sheet, and then the bent piece is bent with respect to the long protective cover sheet. This is a method of manufacturing a fixed-size end protection cover by cutting the end protection cover to a predetermined size and bending the bent pieces on the protective cover body. As in the past, the end protection cover of a predetermined size will be manufactured. Prepared in advance, the field in the transportation and loading in the multi-stage one by one, there is an effect that work, such as storage is not required.

  In addition, the step of bending the bent piece of the long end protection cover with respect to the long protective cover sheet further includes the step of folding the bent piece and the long protective cover sheet at a predetermined angle. The first pressing step that presses inward mutually, and inward so as to form an angle smaller than the angle formed by the bent piece and the long protective cover sheet in the first pressing step In the case of including at least a second pressing step that presses the sheet, after pressing the bent piece and the long protective cover sheet in the first pressing step, the second pressing step is stronger than the first pressing step. Since the pressing is performed stepwise by the pressing force, there is an effect that the bent piece can be suitably bent with respect to the protective cover body.

  Furthermore, not only in the first pressing step and the second pressing step as described above, but also in the second pressing step, mutually forming an angle smaller than the angle formed by the bent piece and the long protective cover sheet. In the case of further including a third pressing step of pressing inwardly, the bent piece and the long protective cover sheet are pressed by three stages of pressing forces at different angles formed by the bent piece and the long protective cover sheet. Is pressed, so that there is an effect that it can be more suitably bent.

  Further, as a means for pressing each other inward so that the bent piece and the long protective cover sheet form a predetermined angle, for example, a convex roller whose outer peripheral surface is formed to protrude in a substantially V shape. And the outer peripheral surface of the convex roller so as to be fitted with the outer peripheral surface of the convex roller so that the outer peripheral surface is recessed in a substantially V shape and pressed between the concave rollers arranged to face the convex roller. When such a means is adopted, the bent piece and the protective cover main body can be obtained by simply passing the long and flat end protective cover between the convex roller and the concave roller as described above. It is possible to produce the same effect as when bending is performed by applying force from the outside.

  And when using the bending roller which consists of such a convex roller and a concave roller, it is for the bending from which an inclination angle differs in order to implement a 1st press process, a 2nd press process, and a 3rd press process as mentioned above. If three pairs of rollers are prepared, the number of folding rollers is not extremely large, so even if three pairs of folding rollers having different inclination angles are provided in the apparatus, The structure does not increase in size and complexity, and the cost of such a device does not become extremely high.

The schematic front view of the edge protection cover of the fixed dimension manufactured with the manufacturing method of this invention. The schematic front view which shows the process of preparing a elongate edge part protection cover. The schematic perspective view which shows the state which pulls out the elongate edge part protective cover wound up. The schematic plan view of a long end protection cover. The schematic front view of the apparatus used for the manufacturing method of this invention. The schematic plan view of the apparatus used for the manufacturing method of this invention. The side view of the apparatus of the state seen from the A direction of FIG. The perspective view which shows the state by which the elongate edge part protective cover which let the bending roller of FIG. 7 pass is bent. The side view of the state seen from the B direction of FIG. The perspective view which shows the state by which the elongate end part protection cover which let the bending roller of FIG. 9 pass is bent. The side view of the state seen from the C direction of FIG. The perspective view which shows the state by which the elongate end part protection cover which let the roller for bending of FIG. 11 pass is bent. The schematic plan view of the process of cut | disconnecting an elongate edge part protective cover to a predetermined dimension. FIG. 14 is an enlarged sectional view taken along line D-D in FIG. 13. The schematic plan view of the elongate edge part protection cover of other embodiment.

  Hereinafter, embodiments of the present invention will be described. First, before explaining the manufacturing method of the edge protection cover for coil packaging of this invention, the edge protection cover for coil packaging used as object is demonstrated.

  As shown in FIG. 1, the end protective cover 1 manufactured by the manufacturing method of the present invention includes a synthetic resin strip-shaped protective cover main body 2 and a synthetic resin via a connecting portion 3 connected to the protective cover main body 2. And a plurality of substantially trapezoidal bent pieces 4 formed integrally with each other. Since the bent piece 4 is formed in a substantially trapezoidal shape, a plurality of substantially V-shaped cutout portions 5 are formed between the plurality of bent pieces 4.

  Next, in order to manufacture the end protection cover 1 having such a configuration, a process of preparing the long end protection cover 1a will be schematically described with reference to FIG. A synthetic resin as a raw material for the protective cover is put into the hopper 6 and extruded from the extruder 7 to form a long and flat sheet and supplied to the presser roll 8. In the presser roll 8, a groove is formed at a position to be a continuous portion 3 between a long protective cover body 2 a and a bent piece 4 described later. The extruded long sheet is passed through the presser roll 8 and then supplied to the cooling water machine 9 to be cooled.

  Next, after supplying the long sheet to the take-up machine 10, the sheet is supplied to the V-cut punching machine 11 to form the substantially V-shaped cutout portion 5. As a result, the plurality of bent pieces 4,... Are formed. As shown in FIGS. 3 and 4, a plurality of bent pieces are connected to the long protective cover main body 2a via the connecting portion 3. The long and flat end protection cover 1a on which the piece 4 is formed is manufactured. Then, the manufactured long end protective cover 1a is supplied to the winding tool 12 such as a winding reel and wound.

  Next, a method for manufacturing a fixed-size end protection cover 1 from the long end protection cover 1a wound up in this manner will be described.

  First, the configuration of an apparatus for producing such a fixed-size end portion protective cover will be described. As shown in FIGS. 5 and 6, the manufacturing apparatus of the present embodiment includes three pairs of folding rollers, that is, a first folding roller 13, a second folding roller 14, and a third folding roller 15. It is equipped. Further, a supply roller 16 for supplying the end protection cover 1 to the three pairs of bending rollers is provided.

  The three pairs of bending rollers 13, 14, 15 are composed of upper convex rollers 13 a, 14 a, 15 a and lower concave rollers 13 b, 14 b, 15 b. The outer peripheral surfaces of the convex rollers 13a, 14a, and 15a are formed so as to protrude in a substantially V shape, and the outer peripheral surfaces of the concave rollers 13b, 14b, and 15b are recessed in a substantially V shape. And the outer peripheral surface which protruded in the substantially V shape of the said convex rollers 13a, 14a, 15a, and the outer peripheral surface recessedly provided in the substantially V shape of the said concave rollers 13b, 14b, 15b can be mutually fitted. As described above, the angles of the tip portions protruding or recessed in a substantially V-shape are substantially the same.

  And the angle of the front-end | tip part protruded or recessed becomes large in order of the roller 13 for 1st bending, the roller 14 for 2nd bending, and the roller 15 for 3rd bending. This means that the angle formed by the tip is smaller and sharper in the order of the third folding roller 15, the second folding roller 14, and the first folding roller 13. The sharper the tip angle is, the outer peripheral surface inclination angle, which is the angle formed between the virtual horizontal line when the outer peripheral surface of each roller is flat and the outer peripheral surface of each roller that is projected or recessed, is growing.

In the present embodiment, as shown in FIGS. 7, 9, and 11, the angle formed by the inclined line 25 and the virtual horizontal line 26 on the outer peripheral surface of the convex roller 13 a or the concave roller 13 b of the first folding roller 13 is 15. Therefore, the angle formed by the tip of the convex roller 13a protruding in a substantially V shape or the concave roller 13b provided in a substantially V shape is 150 degrees. Become. Further, the outer peripheral surface is formed so that the outer peripheral surface inclination angle formed by the inclined line 25 and the virtual horizontal line 26 of the outer peripheral surface of the convex roller 14a or the concave roller 14b of the second bending roller 14 is 32 degrees, and accordingly. The angle formed by the tip of the convex roller 14a protruding in a substantially V shape or the concave roller 14b provided in a substantially V shape is 116 degrees. Further, the outer peripheral surface is formed so that the angle formed between the outer peripheral surface 25 of the convex roller 15a or the concave roller 15b of the third bending roller 15 and the virtual horizontal line 26 is 48 degrees. The angle formed by the tip of the convex roller 15a projecting at the top or the concave roller 15b recessed in a substantially V shape is 84 degrees.
The outer peripheral surfaces of the upper roller 16a and the lower roller 16b of the supply roller 16 are formed flat.

  The manufacturing apparatus further includes an inverter 17 serving as a drive source, and a belt 18 is wound around the inverter 17 and the supply roller 16. Further, between the supply roller 16 and the first folding roller 13, between the first folding roller 13 and the second folding roller 14, and between the second folding roller 14 and the third folding roller 15, respectively, the belt 19, 20 and 21 are hung around. Reference numeral 22 denotes a gantry, and reference numeral 23 denotes an attachment body to which the respective rollers are attached, and is erected on the gantry 22. Reference numeral 24 denotes a guide body for supplying the end protection cover 1 to the supply roller 16.

  Next, a method for manufacturing a fixed-size end protective cover 1 using such a manufacturing apparatus will be described.

  First, the long end protection cover 1a wound around the winder 12 shown in FIG. 2 is pulled out from the winder 12 as shown in FIG. 3, and the guide body 24 shown in FIGS. To the supply roller 16. The supplied long and flat end protection cover 1a passes between the upper and lower rollers 16a and 16b of the supply roller 16, but the outer peripheral surfaces of the upper and lower rollers 16a and 16b of the supply roller 16 are flat. Since it is formed, the end protection cover 1 is not yet bent at this stage.

  And after passing the roller 16 for supply, the elongate edge part protective cover 1a is supplied to the roller 13 for 1st bending, and passes between the upper and lower convex rollers 13a and the concave rollers 13b. At this time, as shown in FIG. 7, the outer peripheral surface is formed so that the outer peripheral surface inclination angle formed by the outer peripheral surface 25 of the convex roller 13a or the concave roller 13b and the virtual horizontal line 26 is 15 degrees. When the end protection cover 1a having a shape passes between the upper and lower convex rollers 13a and the concave rollers 13b, the folded piece 4 of the long end protection cover 1a has a long shape as shown in FIG. A force for bending the protective cover main body 2a to form an angle of 150 degrees is applied. However, since the long end protection cover 1a is made of synthetic resin and has flexibility, there is also a restoring force against the bending force. At this time, the bent piece 4 is a long protective cover body. The state of being bent at an angle of 150 degrees with respect to 2a is not maintained.

  Next, after passing between the convex roller 13a and the concave roller 13b of the first folding roller 13, the long end protection cover 1a is supplied to the second folding roller 14, and the upper and lower convex rollers 14a and Passes between the concave rollers 14. At this time, as shown in FIG. 9, the outer peripheral surface is formed so that the outer peripheral surface inclination angle formed by the outer peripheral surface 25 of the convex roller 14a or the concave roller 14b of the second bending roller 14 and the virtual horizontal line 26 is 32 degrees. Therefore, when the long end protection cover 1a passes between the upper and lower convex rollers 14a and the concave roller 14b, as shown in FIG. 10, a bent piece of the long end protection cover 1a. 4 acts to bend so as to form an angle of 116 degrees with respect to the long protective cover main body 2a. Since the long end protection cover 1a has flexibility, the state in which the bent piece 4 is bent at an angle of 116 degrees with respect to the long protection cover body 2 is maintained even at this time. I don't mean.

  However, the long end protection cover 1a is formed by the convex roller 13a and the concave roller of the first folding roller 13 formed so that the inclination angle of the outer peripheral surface formed by the outer peripheral surface 25 and the virtual horizontal line 26 is 15 degrees. Since it passes between the convex rollers 14a and the concave rollers 14b of the second folding roller 14 formed so that the angle formed between the outer peripheral surface 25 and the virtual horizontal line 26 is 32 degrees after passing between 13b, it is long. A bending force such that the angle formed between the bent piece 4 and the long protective cover main body 2a is 150 degrees first acts on the end protection cover 1a having a shape, and thereafter the bent piece 4 And a long protective cover main body 2a are bent at such an angle that the angle is 116 degrees. Therefore, the convex roller of the first folding roller 13 is applied to the long end protective cover 1a. 1 Compared to when passing between a and the concave roller 13b, when the second folding roller 14 passes between the convex roller 14a and the concave roller 14b, an effect similar to that of bending with a stronger force occurs. Become. Therefore, although the long end protective cover 1a has flexibility and has a restoring force, it is bent to some extent when it passes through the convex roller 14a and the concave roller 14b of the second folding roller 14. It is in the state that was.

  Further, after passing between the convex roller 14a and the concave roller 14b of the second folding roller 14, the long protective cover 1a is supplied to the third folding roller 15, and the upper and lower convex rollers 15a and concave rollers 15b are supplied. Pass between. At this time, as shown in FIG. 11, the outer peripheral surface is formed so that the outer peripheral surface inclination angle formed by the outer peripheral surface 25 of the convex roller 15a or concave roller 15b of the third folding roller and the virtual horizontal line 26 is 48 degrees. Therefore, when the long end protection cover 1a passes between the upper and lower convex rollers 15a and the concave rollers 15b, as shown in FIG. 12, the bent piece 4 of the long end protection cover 1a. However, a force acts to bend the long protective cover body 2a so as to form an angle of 84 degrees. Since the elongate end protective cover 1a has flexibility, in this case as well, the folded piece 4 is maintained in a state of being bent at an angle of 84 degrees with respect to the elongate protective cover main body 2a. I don't mean.

  However, the long end protective cover 1 is a convex roller of the first folding roller 13 formed so that the outer peripheral surface inclination angle between the outer peripheral surface 25 and the virtual horizontal line 26 is 15 degrees as described above. Between the convex roller 14a and the concave roller 14b of the second folding roller 14 formed so that the outer peripheral surface inclination angle formed by the outer peripheral surface 25 and the virtual horizontal line 26 is 32 degrees after passing between 13a and the concave roller 13b. And further passes between the convex roller 15a and the concave roller 15b of the third folding roller 15 formed so that the outer peripheral surface inclined angle formed by the outer peripheral surface 25 and the virtual horizontal line 26 is 48 degrees. A bending force acts so that the angle formed between the bent piece 4 and the long protective cover body 2a is initially 150 degrees on the long end protective cover 1a, A bending force of 116 degrees is applied to the end, and a bending force of 84 degrees is applied to the end, so that the long end protection cover 1a has three different angles and passes through the steps. Therefore, the same action as that of bending by gradually applying a strong force from the outside of each of the bent piece 4 and the long protective cover main body 2a occurs. Accordingly, the long end protection cover 1a is flexible and has a restoring force, but it is bent by passing it between the bending rollers at three different angles. The piece 4 is suitably bent with respect to the long protective cover main body 2a.

  As described above, the long end protection cover 1a is made up of the first folding roller 13, the second folding roller 14, the convex rollers 13a, 14a, 15a and the concave rollers 13b, 14b of the third folding roller 15. , 15b, the long end protection cover 1a is sequentially cut into predetermined dimensions as shown in FIG. This predetermined dimension is a dimension corresponding to the dimension of the circumference of the end portion where the coiled material to be packaged, for example, a coiled material wound with a metal wire, an iron plate or the like, is wrapped with a packaging material.

  In this way, by sequentially cutting the long end protection cover 1 to a predetermined size, the end protection cover 1 having a predetermined size can be obtained sequentially and continuously. The cross-sectional shape of the end protection cover 1 after cutting is substantially L-shaped in cross section as shown in FIG.

  As described above, in the present embodiment, the three types of folding rollers 13, 14, and 15 are used in which the outer peripheral surface inclination angle formed by the outer peripheral surface 25 and the virtual horizontal line 26 differs stepwise, and these three types of bending are performed. The roller 13, 14, 15 has an outer peripheral surface of the upper convex rollers 13 a, 14 a, 15 a protruding in a substantially V shape, and an outer peripheral surface of the lower concave rollers 13 b, 14 b, 15 b is recessed in a substantially V shape. Since the three outer peripheral surfaces are formed so that their outer peripheral surfaces can be fitted to each other, the long end protection cover 1a is attached to the three pairs of folding rollers 13, 14, 15 By simply passing them in between, the bent piece 4 and the long protective cover main body 2a automatically have the same action as when bent by applying a strong force gradually from the outside. 4 is long Is the so that the suitably folded against the protective cover main body 2a.

  The long end protection cover 1a is a long one, which is initially wound up by the winder 12, and sequentially pulled out so that the three pairs of folding rollers 13, as described above, 14 and 15 are sequentially passed, and then cut to obtain end protection covers 1 having predetermined dimensions. The end protection covers 1 having predetermined dimensions are prepared in advance, and are stacked one by one in the field. There is no need to carry out operations such as transportation and storage.

In the above embodiment, while the long and flat end protection cover is pulled out from the wound state, the folded piece of the end protection cover is bent with respect to the long protection cover sheet. Not only this but after pulling out from the wound state, it is also possible to bend the bent piece of the end protective cover with respect to the long protective cover sheet.
That is, it is possible to continuously perform the bending work while pulling out and transporting the wound long and flat end protection cover, and after the end protection cover is pulled out, the transfer is stopped. It is also possible to perform the bending work intermittently.

  In short, the long and flat end protection cover is pulled out from the wound state without questioning whether it is continuous or intermittent, and the bent piece of the end protection cover is taken out as a long protection cover sheet. After that, the long end protection cover, which is bent with respect to the long protective cover sheet, is cut into a predetermined dimension, and the bent piece is bent into the protective cover body. What is necessary is just to manufacture the edge protection cover of the fixed dimension provided continuously.

  Furthermore, in the above-described embodiment, three pairs of the first folding roller 13, the second folding roller 14, and the third folding roller 15 are used as the folding rollers, but the number of the folding rollers is the same as that of the embodiment. It is not limited to these three pairs, but may be two pairs, for example. However, as the number of the bending rollers increases, a smooth bending force acts on the long end protection cover 1a.

  On the other hand, the greater the number of folding rollers, the more complicated the configuration of the device, and the higher the cost of manufacturing the end protection cover, so that these can be prevented and the folding operation can be performed properly and smoothly. From both viewpoints, it is desirable to use three pairs of folding rollers as in the above embodiment.

  Furthermore, it is also possible to harden the end protection cover by heat after bending. Thereby, the state by which the bending piece was bend | folded with respect to the protective cover sheet | seat will be maintained.

  Moreover, in the said embodiment, although the bending piece 4 of the edge part protection cover was formed in trapezoid shape, the shape of the bending piece 4 is not limited to this embodiment, For example, as shown in FIG. The shape may be substantially rectangular or triangular, and the shape is not limited. In short, any shape may be used as long as the end protection cover can be easily wound around the peripheral surface of the end of the wound coil.

  Further, in the above embodiment, the synthetic resin is used as the material of the end protection cover 1, but the material of the end protection cover 1 is not limited to this. For example, a paper material such as cardboard is used. It is also possible to use it. However, when the end protection cover 1 is formed of a synthetic resin, it is light in weight and easy to manufacture and has excellent water resistance, impact resistance and strength resistance. There is an advantage that the end protection cover 1 can be prevented from being cracked or torn due to an impact such as vibration or dropping.

  In the present invention, the bending piece 4 is bent with respect to the long protective cover main body 2a using the bending roller as described above. However, the protective cover main body 2a may be bent with other means. The folding of the bent piece 4 is also included in the scope of the present invention. In short, prepare a long end protection cover with a number of bent pieces connected to the longitudinal side edge of the long protective cover sheet across the notch, and wind it up on the winder Next, the wound-up long end protective cover is pulled out, the bent piece of the long end protective cover is bent with respect to the long protective cover sheet, and then the bent piece A long-sized end protective cover that is bent with respect to a long protective cover sheet is cut into a predetermined dimension, and a fixed-sized end protective cover in which bent pieces are continuously provided on the protective cover body. Should be manufactured.

DESCRIPTION OF SYMBOLS 1 End part protection cover 1a Long end protection cover 2 Protection cover main body 2a Long protection cover main body 4 Bending piece 5 Notch part 12 Winding tool 13 First folding roller 14 Second folding roller 15 Third folding roller

Claims (3)

A method of manufacturing an end protection cover used for protecting an end of a coiled product to be wrapped when a coiled product wound in a coil shape is packaged with a packaging material. A long and flat end protective cover (1a) in which a large number of bent pieces (4) are continuously provided with a notch (5) on one side edge in the longitudinal direction of the protective cover sheet (2a). a step to pull out from the wound state, a step of bent pieces (4) Ru folded against elongated protective cover sheet (2a) of said end portion protective covers (1a), said bent pieces The long end protective cover (1a), which is bent with respect to the long protective cover sheet (2a), is cut into a predetermined dimension and bent into the protective cover body (2). (4) a process in which the production of continuously provided by the sizing of end protective cover (1) folded, protective cover said end portion In the step of bending the folded piece (4) of 1a) with respect to the long protective cover sheet (2a), the bent piece (4) and the long protective cover sheet (2a) are further predetermined. A first pressing step in which the bent piece (4) and the long protective cover sheet (2a) are pressed inward to each other so as to form an angle of 4) and the long protective cover sheet (2a) face each other inward so as to form an angle smaller than the angle formed by the long protective cover sheet (2a). The manufacturing method of the edge part protection cover characterized by including at least the 2nd press process pressed to . In the second pressing step, the bent piece (4) and the long protective cover sheet are formed so as to form an angle smaller than the angle formed by the bent piece (4) and the long protective cover sheet (2a). (2a) and a third pressing step further comprises claim 1 ends the production method of the protective cover according to pressing inward to each other. The means for pressing the folded piece (4) and the long protective cover sheet (2a) inward to each other so as to form a predetermined angle is formed so that the outer peripheral surface protrudes in a substantially V-shape. By passing between a convex roller and a concave roller whose outer peripheral surface is recessed in a substantially V shape so as to be fitted with the outer peripheral surface of the convex roller and arranged to face the convex roller The method for producing an end protection cover according to claim 1 or 2 , wherein the end protection cover is a means for pressing.

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