JP2016129925A - Paper strip removal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper piece removing device which can securely remove a paper piece when the paper piece generated in cutting is mixed in a finished paper sheet, and can detect the removed paper piece and notify an operator quickly.SOLUTION: A paper piece detecting device includes at least: paper piece removing means which is arranged above and/or below a conveyer for conveying a paper sheet after cutting and uses a scraping member and/or air to a front surface and/or a rear surface of an entire paper; means of dropping and collecting the paper piece removed by the paper piece removing means below the conveyer; means which is arranged on a bottom part opening part of the collecting means and places the paper piece; and means which is arranged inside the collecting means or in an adjacent external having an imaging window on a side wall of the collecting means, compares a value measured on a dust collection filter optically, and a previously-set measurement value of the dust collection filter without a paper piece, and detects the paper piece.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an apparatus for removing a paper piece, which is a cutting waste generated when cutting a sheet into a predetermined size, from the paper and detecting the removed paper piece.

2. Description of the Related Art Conventionally, a web (sheet) produced by a paper machine in a paper manufacturing process is cut by a slitter and a cutter of a cutting machine into a size desired by a user. When a user produces a printed matter, the printed matter is completed by printing a desired print pattern on a sheet using a printing machine. When a printed material is printed on a single sheet by arranging a plurality of identical images, for example, 25 × 5 × 5 pages, the printed material is cut into 25 pages each.

FIG. 12 is a schematic diagram showing the cutting process, and FIG. 12A is a plan view showing the unprocessed paper (SB). The unprocessed paper (SB) is paper before cutting, for example, a rolled paper produced by a paper machine in a paper manufacturing process, or a plurality of identical images, for example, 25 × 5 × 5 on a printing machine in a printing process. It is a printed matter that is a sheet of paper that is placed and printed. In FIG. 12A, the paper is a paper that has been cut by a paper cutter into a size that can be printed by a printing machine from a web produced by a paper machine in the paper manufacturing process.

The unprocessed paper (SB) in FIG. 12A has a size and shape of a finished product (printed product) desired by the user, and is loaded on a machine in a subsequent process such as a printing process or a quality inspection process. In order to cut the top and bottom corners of the paper so that the top and bottom direction of the paper is not mistaken, it is used as a mark, and at least one of the cutting positions (i) and (ii) indicated by dotted lines, and the cutting position to make the paper a normal dimension (Iii) is cut with a slitter and cutter of a cutting machine. FIG. 12B is a plan view showing the sheet (S) that is the unprocessed sheet (SB) after cutting.

After the cutting, as the paper (S) is completed, a cutting scrap (K) that is a cut-off portion of the unprocessed paper (SB) is generated. Therefore, the cutting scrap (K) is placed near the slitter or the cutter. A suction device for suction and dust collection is attached. However, the shape of the cutting waste (K) does not necessarily become the same shape depending on the cutting position, as indicated by K1, K2, and K3 in FIG. For example, as shown in K3, the cutting waste (K) may be further broken to form a plurality of cutting wastes (K). Furthermore, since the generation timing varies, the suction device cannot reliably suck and collect all the cutting waste (K). Therefore, the front surface and / or the back surface of the paper (S) after cutting is a piece of paper (C) that is one of the cutting scraps that cannot be removed by the suction device shown in FIGS. 12 (c) and 12 (d). May stick.

  Therefore, in Patent Document 1, air is blown from above on the paper being transported, the paper pieces and paper dust generated at the time of cutting are removed, and then the paper pieces and paper dust that have been sucked from the bottom of the transport path and scattered from the paper. An apparatus for sucking and collecting in one place is disclosed.

JP 2006-102844 A

Patent Document 1 makes it possible to remove a piece of paper and paper dust from the cut paper. However, since the paper pieces and the paper dust are collected in one place without being distinguished, it is impossible to detect and manage only the paper pieces. If the paper is used for precious printed matter such as banknotes or securities, if printing is performed with a piece of paper attached to the paper, printing is performed on the piece of paper instead of the paper at the place where the piece of paper is attached. As a result, defective printing occurs.

Even if a piece of paper that is not part of a completed precious printed matter and is being produced is lost, the paper is imitated by analyzing the paper features such as the material of the piece of paper and machine reading characteristics. There is a possibility. Therefore, as well as managing the finished product, it is necessary to manage the quantity and quality of a piece of paper, which is a part of the paper, in the same way as a completed valuable printed matter.

The present invention solves these problems, and reliably removes a piece of paper generated at the time of cutting when it is mixed in a completed sheet, and also detects the removed piece of paper so that the operator can quickly detect it. Provided is a paper piece removing device capable of informing the user.

In order to achieve the above-mentioned object, the paper piece removing apparatus of the present invention has transport means comprising a conveyor for transporting a wound paper or sheet cut to a predetermined size, and is generated when the paper is cut to a predetermined size. An apparatus for removing adhering paper pieces, which is disposed above and / or below a conveyor and is contactless and / or non-contacted by blowing air to the entire front surface and / or entire back surface of the paper using a scraping member. A means for removing the paper pieces; a means disposed below the conveyor with openings at the top and bottom; the paper pieces removed by the paper piece removing means are dropped from the top opening to the bottom opening and collected; A paper piece placing means provided with a dust collecting filter for placing a piece of paper placed at the bottom opening of the collecting means, and an optical device arranged in the collecting means or outside adjacent to the collecting means with an imaging window on the side wall. Dust collection A value measured on the motor, comparing the measured value of the dust collecting filter having no paper previously set, characterized by comprising at least means for detecting a piece of paper.

  In the paper piece removing apparatus of the present invention, the paper piece placing means includes a suction blower below the dust collecting filter in order to suck the paper pieces that have fallen into the collecting means.

  In the paper piece removing apparatus of the present invention, the paper piece removing means is a brush and / or an air chamber.

  Furthermore, in the paper piece removing apparatus of the present invention, the detection means has a function of stopping an alarm and / or the machine when a paper piece is detected.

The paper piece removing apparatus according to the present invention is provided with a means for removing the paper piece on the transport path, sucks and collects the removed paper piece, and detects the sucked paper piece, thereby reliably removing the paper piece generated after cutting. At the same time, it is possible to promptly notify the operator of the generated paper piece.

The top view which shows the paper piece removal apparatus (M) of this invention. The side view which shows the paper piece removal apparatus (M) of this invention. The block diagram which shows the paper piece removal apparatus (M) of this invention. The schematic diagram explaining the brush which is a paper piece removal means (3) of this invention. The schematic diagram explaining the paper piece removal means (3) arrange | positioned at the upper-lower pair of this invention. The schematic diagram explaining the contact roll which is the paper piece removal means (3) of this invention. FIG. 9 is a schematic diagram illustrating a paper guide (9) according to the present invention. The schematic diagram which shows the case where the detection part (6a) of this invention is used as an optical sensor. The schematic diagram which shows the case where the detection part (6a) of this invention is used as an area camera. The schematic diagram explaining the inclined belt (7) and horizontal ruler (8) of this invention. The schematic diagram which shows the paper pressing means (10) of this invention. The schematic diagram which shows a paper piece (C).

Embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments to be described below, and various other embodiments can be implemented within the scope of the technical idea described in the claims.

FIG. 1 is a plan view of a paper piece removing device (M) of the present invention, and FIG. 2 is a side view of the paper piece removing device (M).

The paper piece removing device (M) includes at least an upstream conveyor (1), a downstream conveyor (2), a paper piece removing means (3), a collecting means (4), a paper piece placing means (5), and a detecting means (6). Have.

A printed matter made of a paper machine manufactured by a paper machine in a paper manufacturing process or a sheet of paper printed with a plurality of identical images, for example, 5 × 5 25 faces arranged by a printing machine in a printing process, has a desired size, For example, a sheet (S) is obtained by cutting to a size that can be printed by a printing press. Next, after the sheets (S) are stacked on a feeder unit (not shown) of the paper piece removing device (M), they are sent one by one to the upstream conveyor (1).

Next, the paper piece adhering to the paper (S) is removed by the paper piece removing means (3). As shown in FIG. 12 (a), the paper piece (C) in the present invention cuts the cutting positions (i) and (ii) indicated by dotted lines on the unprocessed paper (SB) with a slitter and cutter of a cutting machine. Of the cutting waste (K) cut away from the paper (S) at the time of cutting shown in FIG. 12 (c) when the paper (S) shown in FIG. 12 (b) is produced, a slitter or cutter The cutting waste (K) that cannot be removed by the suction device provided in the vicinity of. Therefore, the paper pieces (C) are not necessarily attached to all the papers (S).

The paper piece (C) removed by the paper piece removing means (3) is collected in the collecting means (4), and when the paper piece (C) is generated, the detecting means (6) detects the paper piece (C). .

Hereinafter, the paper piece removing device (M) of the present invention will be described in detail with reference to the block diagram of the paper piece removing device (M) of FIG.

The upstream conveyor (1) and the downstream conveyor (2) are means for conveying the cut sheet (S), and each includes a conveyance belt (1a, 2a) and rollers (1b, 2b). The upstream conveyor (1) and the downstream conveyor (2) are linearly arranged in the same direction as the conveying direction, and are conveyed one by one in the paper piece removing device (M) while maintaining flatness. It becomes possible to do. Hereinafter, when describing two of the upstream conveyor (1) and the downstream conveyor (2), they are referred to as conveyors (1, 2).

In the conveyors (1, 2), the rollers (1b, 2b) connected to a motor (not shown) rotate, so that the transport belts (1a, 2a) rotate in synchronization. Thereby, the paper (S) on the transport belt (1a, 2a) is transported in the paper piece removing device (M).

In the conventional paper piece removing device, it was possible to remove the paper piece (C) from the paper, but the paper piece (C) after the removal is a paper (S) other than the paper piece (C) such as paper dust or dust. It was collected in one place together with the foreign matter adhering to the surface. Therefore, even if the piece of paper (C) is removed, it is impossible to immediately grasp the situation.

Therefore, in the present invention, the paper piece removing device (M) includes at least the paper piece removing means (3), the collecting means (4), the paper piece placing means (5), and the detecting means (6). ), The paper piece (C) is removed from the paper (S), and only the removed paper piece (C) can be collected.

Further, by detecting the presence or absence of a piece of paper (C) at the collected location, it is possible to immediately notify the operator when the presence of the piece of paper (C) is detected. As a result, it is possible to detect which paper (S) is transported at the timing when the paper (S) is generated, so that even if the paper (C) that is a part of the paper (S) is removed, It is possible to immediately grasp the situation.

Next, the paper piece removing means (3), the collecting means (4), the paper piece placing means (5), and the detecting means (6), which are characteristic points of the paper piece removing apparatus (M), will be described in detail.

First, the paper piece removing means (3), which is the first feature point of the paper piece removing device (M), will be described. The paper piece removing means (3) is arranged above and / or below the conveyors (1, 2), and contacts and / or the entire surface and / or the entire back surface of the paper (S) using a scraping member. A piece of paper (C) is removed in a non-contact manner by blowing air. Since the paper piece removing means (3) acts on the entire front surface and / or the entire back surface of the paper (S), in addition to the paper piece (C), the paper attached to the paper (S) after cutting. It is possible to remove the powder at the same time. 1 and 2, the paper piece removing means (3) is disposed above and below the conveyors (1, 2).

It is unknown where the paper piece (C) is attached to the paper (S). Therefore, it is possible to reliably remove the piece of paper (C) by using a scraping member or air described later on the entire front surface and the entire back surface of the paper (S).

In addition, after the cut sheets (S) are stacked and arranged on the feeder unit of the paper piece removing device (M), the sheets (S) are fed one by one onto the conveyors (1, 2). In this case, the piece of paper (C) adhering to the back surface of the paper (S) may be transported after dropping on the surface of the paper (S) to be transported next.

Further, when the sheets (S) are stacked on the feeder unit, static electricity may be generated due to the frictional force between the sheets (S). At that time, when the stacked sheets (S) are fed one by one onto the conveyor (1, 2), the piece of paper (C) adhering to the surface of the sheet (S) is the previous sheet ( When (S) is conveyed, there is a possibility that the sheet (S) may adhere to the back surface of the sheet (S) and be conveyed.

Therefore, at least the entire front surface and / or the entire back surface of the paper (S) is contacted by using a scraping member, or air is blown to remove the paper piece (C) in a non-contact manner. It is set as the structure which can remove a paper piece (C) with respect to the whole surface of S, and the whole back surface.

Next, the scraping member and air which are the paper piece removing means (3) will be described. The scraping member is a brush or a contact roll, and the scraping member is brought into contact with the paper piece (C) attached to the paper (S) being conveyed, whereby the paper piece (C) is made into the paper (S). It is a means to remove from.

The air is air that is ejected from the air chamber or the air nozzle. By ejecting air from the air chamber or air nozzle to the paper (S) being conveyed, the paper piece (C) is ejected from the paper (S). It is a means to remove. Actually, the ejected air is in contact with the paper piece (C), but in the present invention, the contact of air is not contacted.

First, the case where the paper piece removing means (3) is a brush (3a) will be described. As shown in FIG. 4 (a), the brush (3a) has a strip-shaped handle (3a-1) or a tip of the roll-shaped handle (3a-1) or the periphery thereof as shown in FIG. 4 (b). And have a brush (3a-2) composed of a plurality of fibers.

FIG. 5 is an enlarged view of the paper piece removing means (3) shown in FIG. Actually, as shown in FIG. 2 described above, means other than the paper piece removing means (3) are also arranged. However, only the paper piece removing means (3) is shown for detailed explanation. . A plurality of the paper piece removing means (3) are arranged above and below with gaps (h1, h2) with respect to the paper (S) transport path (VR) indicated by a dotted line in FIG.

Note that the gaps (h1, h2) with respect to the transport path (VR) are as shown in FIG. 5 (a) when the paper piece removing means (3) is arranged above and below the conveyors (1, 2). The gap between the paper piece removing means (3) arranged above and below is the gap (h1, h2) with respect to the transport path (VR). Further, as shown in FIG. 5B, when the paper piece removing means (3) is arranged only on one of the upper side or the lower side of the conveyors (1, 2), the paper piece removing means (3) and the transport path (VR) ).

The clearances (h1, h2) of the brush (3a) with respect to the (VR) transport path are narrowed toward the downstream side from the upstream side in the transport direction (V). In FIG. The gap gradually narrows from the gap (h1) to the downstream gap (h2).

In order to reliably separate the paper piece (C) attached to the paper (S), it is necessary to bring the brush (3a) into contact with the front surface and / or the back surface of the paper (S). However, the paper (S) may be deformed by heat treatment in the paper manufacturing process. Further, in the printing manufacturing process, deformation may occur even when printing pressure is applied. Therefore, the paper (S) conveyed by the paper piece removing device (M) is not flat and swells, and due to external factors such as air resistance and mechanical vibration caused by the paper conveyance, the paper (S) is conveyed in the conveyance direction (V). In some cases, vertical movement may occur.

The gap (h1, h2) with respect to the (VR) transport path of the brush (3a) is set to be equal to or less than the thickness of the paper (S) in order to bring the brush (3a) into contact with the front surface and / or the back surface of the paper (S). In this case, the conveyed paper (S) cannot pass through the gap (h1) on the upstream side of the brush (3a), and the paper head which is the front end of the paper (S) in the conveyance direction (V) is struck. It may cause a conveyance failure by being applied.

Therefore, the gaps (h1, h2) with respect to the (VR) conveyance path of the brush (3a) are gradually increased from the upstream gap (h1) to the downstream gap (h2) in the conveyance direction (V). The gap is narrowed so that only the downstream gap (h2) can be brought into contact with the sheet (S). For example, if the thickness of the paper (S) is 100 μm, the upstream gap (h1) is 2 cm and the downstream gap (h2) is less than 100 μm, so that the paper (S) is pushed by the brush (3a). In addition to preventing catching, the contact force between the brush (3a) and the paper (S) becomes stronger on the downstream side of the brush (3a), so that the paper piece (C) attached to the paper (S) can be reliably separated. It becomes possible.

In addition, as shown in FIG. 1, a plurality of brushes (3 a) are arranged obliquely with respect to the transport direction (V), so that the surface and / or the back surface of the paper (S) passing through the brush (3 a) The brush (3a) contacts the entire surface, and the paper piece (C) attached to the paper (S) can be removed.

The number of the brushes (3a) and the mounting angle with respect to the conveying direction of the brushes (3a) are such that the brushes (3a) are in contact with the entire surface of the sheet (S) passing through the brushes (3a) and / or the entire back surface. However, the gap between the adjacent brushes (3a) is narrower than the narrowest width of the assumed paper piece (C). .

In FIG. 12A, the cutting positions (i), (ii), and (iii) indicated by dotted lines are cut, so that three cutting chips (K1, K2, K3) shown in FIG. 12B are obtained. Of these cutting scraps (K1, K2, K3), the cutting scraps (K) that remain without being removed by the suction device in the cutting machine become paper pieces (C). Therefore, the assumed piece of paper (C) is one of three cutting pieces (K1, K2, K3).

The width of the paper piece (C) in the present invention refers to the sides (L1, L2, L3) constituting the paper piece (C) shown in FIG. 12 (c), and the assumed width of the paper piece (C). Means each side of the cutting waste (K1, K2, K3) generated during cutting.

For example, the width (X × Y) of the unprocessed paper (SB) before cutting shown in FIG. 12A is a rectangular shape of 60 cm × 40 cm, the cutting position (i) is 8 cm, and Y2 is 5 cm. Cutting and cutting position (ii) with X2 being 6 cm and Y3 being 6 cm to form the sheet (S) shown in FIG. The side of K1) is 8 cm × 5 cm × 9.4 cm (calculated as a right triangle), and the side of the cutting chip (K2) is 6 cm × 6 cm × 8.5 cm (formed as a right triangle).

As shown in the cutting waste (K3), when the cutting waste (K3) itself is large, as shown in FIG. 12B, it may be torn and become a plurality of cutting wastes (K3). Therefore, when the cutting position (iii) is cut with X3 as 2 cm, the side of the cutting waste (K3) that becomes the assumed paper piece (C) is assumed to be 2 cm × 40 cm before breaking.

Therefore, the gap between the adjacent brushes (3a) is made narrower than the narrowest width of the assumed paper piece (C), and is therefore narrower than 2 cm, which is the narrowest side. By making the gap between the brushes (3a) narrower than the narrowest width of the paper pieces (C), the paper pieces (C) separated from the paper (S) can be surely dropped below the conveyors (1, 2). It becomes possible.

The material of the brush (3a-2) in the brush (3a) is that no defective transport occurs when the paper (S) being transported and the brush (3a-2) come into contact with each other, and the piece of paper (C) is removed. A material having a rigidity capable of satisfying the requirements is appropriately selected. For example, in the case of the paper (S) made of the same material, the thicker and harder, the less deformation due to external force. Therefore, when the paper (S) is thin and soft, vegetable fibers and animal hair which are soft fibers are used so as not to cause poor conveyance.

When the paper (S) is thick and hard, it is difficult to cause poor conveyance. Therefore, any of soft fibers and hard fibers such as vegetable fibers, animal hair, and synthetic fibers can be used. ), The soft fiber may not be able to remove the paper piece (C) even when the paper piece (C) contacts the brush (3a-2). Therefore, when the paper (S) is thick and hard, it is preferable to use a synthetic fiber that is a hard fiber.

The plurality of brushes (3a) are arranged on the conveyors (1, 2) at a constant pitch in FIGS. 1 and 2, but as described above, the paper (S) that passes through the brushes (3a). As long as the brush (3a) is in contact with the entire surface of the front surface and / or the back surface, the present invention is not limited to this and can be appropriately disposed.

Next, the case where the paper piece removing means (3) is a contact roll (3c) will be described. As shown in FIG. 6A and FIG. 6B, the contact roll (3c) includes a cylindrical roll (3c-1) having a metal rotation shaft, and an elastic portion (3c-2) on the outer periphery of the roll. ).

  The elastic part (3c-2) may be provided so as to cover the periphery of the roll (3c-1) as shown in FIG. 6 (a), or the roll (3c) as shown in FIG. 6 (b). It is good also as a structure which provided the some acicular elastic part (3c-2) in the circumference | surroundings of 1). In the case of the configuration shown in FIG. 6B, the distance between the adjacent elastic portions (3c-2) is narrower than the narrowest width among the assumed widths of the paper pieces (C). By making the gap between adjacent elastic parts (3c-2) narrower than the narrowest width of the paper piece (C), the paper piece (C) attached to the paper (S) is caught by the elastic part (3c-2). Thus, it is possible to surely fall below the conveyors (1, 2).

The elastic part (3c-2) is a material having elasticity such as resin and rubber, and the paper piece (C) can be removed by contacting the elastic part (3c-2). The vertical gap, attachment location, attachment angle, and the like with respect to the conveyance path of the contact roll (3c) are the same as those of the brush (3a) described above, and thus the description thereof is omitted.

Next, the case where the paper piece removing means (3) is an air chamber (3b) will be described. The air chamber (3b) blows out compressed air supplied from a compressor (not shown) from the ejection port (3b-1), thereby removing the paper piece (C) adhering to the paper (S) in a non-contact manner. It is a means and is arrange | positioned above conveyor (1,2) in FIG.1 and FIG.2. The air pressure blown onto the paper (S) can be set as appropriate depending on the thickness of the paper (S) and the conveyance speed. When the paper (S) is thin, if the air pressure is large, When the paper head of the paper (S) being conveyed hangs down, the paper (S) may be poorly conveyed.

However, when the air pressure is low, there is a possibility that the paper piece (C) cannot be sufficiently removed from the paper (S). Therefore, when the air chamber (3b) is used for the paper piece removing means (3), in order to blow out sufficient air pressure from the jet port (3b-1), as shown in FIG. It is preferable to attach the paper guide (9) at a position that is paired with the removing means (3).

FIG. 7 is an enlarged view of the paper guide (9) shown in FIG. Actually, as shown in FIG. 2 described above, means other than the paper piece removing means (3) and the paper guide (9) are also arranged. However, the description is omitted for the sake of detailed explanation. Yes. The paper guide (9) is a plate-like member that holds the height of the paper (S) being conveyed. By providing the paper guide (9), even when air pressure is jetted onto the paper (S), the paper (S) being transported can be transported without sagging.

The gap (h3) between the paper guide (9) and the transport path is not particularly limited as long as it is wider than the paper thickness of the paper (S). Further, as shown in FIG. 1, when a plurality of strip-shaped paper guides (9) are arranged in parallel with the transport direction, the interval between the plurality of arranged paper guides (9) is the gap between the brushes (3a) described above. In the same manner as described above, it is made wider than the widest width of the assumed paper piece (C). Thereby, the paper piece (C) separated from the paper (S) can surely fall below the conveyors (1, 2) without being caught by the paper guide (9).

  Next, the collection means (4), which is the second feature point of the paper piece removing device (M), will be described. The collecting means (4) is arranged below the conveyors (1, 2) and is means for collecting the paper piece (C) removed by the paper piece removing means (3).

The collection means (4) has a box shape having openings at the top and bottom, respectively, and a paper piece placement means (5), which is the third feature point of the paper piece removal device (M), is arranged at the bottom. . The paper piece (C) separated from the paper (S) by the paper piece removing means (3) is dropped into the collecting means (4), and then the paper piece placing means (5) installed at the bottom of the collecting means (4). After the paper piece (C) is left, the presence or absence of the paper piece (C) is detected by the detection means (6) which is the fourth feature point of the paper piece removing device (M). The details of the paper piece placement means (5) and the detection means (6) will be described later.

  The width (W1) of the upper opening shown in the side view of FIG. 2 in the collecting means (4) is the most downstream side from the position where the paper piece removing means (3) provided on the most upstream side is installed on the transport path. It is set to a size that can cover all the positions up to the position of the paper piece removing means (3) provided in.

Specifically, as shown in FIG. 2, from the position where the brush (3a) which is the paper piece removing means (3) provided on the most upstream side of the transport path is installed, the paper piece removing means (3 provided on the most downstream side). The width (W1) is larger than the distance (W2) to the position of the air chamber (3b). Thereby, it is possible to reliably collect the paper piece (C) removed by the paper piece removing means (3) in the collecting means (4). If paper dust is attached to the paper (S), the paper dust is also collected by the collecting means (4).

  Further, in the recovery means (4), the width (W3) of the lower opening shown in the side view of FIG. 2 is preferably narrower than the width (W1) of the upper opening. Thereby, the collection means (4) can collect the piece of paper (C) dropped into the collection means (4) in one place by reducing the width (W3) of the lower opening. Since the paper piece (C) may adhere to the side wall and stop without falling due to static electricity generated on the paper (S), it is possible to install a suction function on the paper piece placement means (5) described later. preferable.

Next, the paper piece placing means (5), which is the third feature point of the paper piece removing device (M), will be described. The paper piece placing means (5) is means for placing the paper piece (C) removed by the paper piece removing means (3) and dropped into the collecting means (4), and has at least a dust collecting filter (5b).

As shown in FIG. 2, the dust collection filter (5b) is a mechanism that is disposed in the opening at the bottom of the collection means (4) and places the piece of paper (C) that has fallen into the collection means (4). A plate-like member having a mesh or a plurality of holes. The mesh or hole is narrower than the narrowest width of the assumed width of the paper piece (C) in order to leave the paper piece (C) on the dust collecting filter (5b).

  Note that, due to static electricity generated on the paper (S), a piece of paper may stick to the side wall and stop without falling. Depending on the size of the paper piece (C), the paper piece (C) once placed on the dust collecting filter (5b) is separated from the paper piece placement means (5) by the wind pressure of the paper (S) being conveyed. In some cases, the collection means (4) may spread again. Furthermore, paper dust may adhere to the cut sheet (S). At that time, it may be difficult to detect the paper piece (C) because the paper powder spreads in the collecting means (4) and the paper powder adheres to the detecting means (6) described later. Therefore, it is preferable that the paper piece placing means (5) further includes a suction blower (5a).

As shown in FIG. 2, the suction blower (5a) is disposed adjacent to the opening at the bottom of the collecting means (4) to remove paper dust in the collecting means (4) and to collect the dust collecting filter (5b). ) Is a mechanism for placing the paper piece (C) on the sheet while sucking it. The suction blower (5a) sucks the paper powder in the collecting means (4) and sucks air through a suction hole (not shown).

By sucking the paper piece (C) in the collecting means (4) through the dust collecting filter (5b) by the suction blower (5a), the paper piece (C) dropped in the collecting means (4) is collected in the dust collecting filter ( 5b) and a piece of paper (C) is placed. At that time, if paper dust is adhered, the paper dust passes through the mesh or the hole. Thus, it is possible to reliably detect only the paper piece (C) in the detection means (6) described later.

Further, the paper dust that has adhered to the paper (S) and spread in the collecting means (4) at the time of cutting is also removed by the suction blower (5a). Thereby, it is also possible to prevent malfunction of the detection means (6) due to the adhesion of paper dust by cleaning the air in the recovery means (4).

The color of the dust collection filter (5b) is darker, such as black or dark blue when the paper (S) is white or light aqua, such as light blue so that the piece of paper (C) adsorbed to the dust collection filter (5b) stands out. Is preferable. On the other hand, when the paper (S) is dark, the dust collection filter (5b) is preferably light. Thereby, when the detection means (6), which will be described later, is an area camera, the paper piece (C) on the dust collection filter (5b) can be clearly imaged.

The suction means (5) may further be provided with a storage box (5c) for storing paper dust. As shown in FIG. 2, the storage box (5c) is arranged with an opening in the upper part at a position facing the recovery means (4) via the dust collection filter (5b), and the dust collection filter (5b). ) Is a box shape for storing paper powder that has passed through. The storage box (5c) is configured to be detachable with respect to the collecting means (4) or to be connected to a duct (not shown) so that the stored paper dust can be discarded. The paper dust can be discharged out of the storage box (5c).

Next, the detection means (6), which is the fourth feature point of the paper piece removing device (M), will be described. The detection means (6) is a means for detecting a piece of paper (C) on the dust collection filter (5b), and at least the detection section (6a) is arranged. By providing the detection means (6), it is possible to quickly find the piece of paper (C) removed from the paper (S).

The detection unit (6a) is a means for measuring the amount of reflection with respect to the reflected image or light of the dust collection filter (5b), and is an area camera or a light reflection sensor. In the detection means (6), the control unit (11) sets in advance a reflection image captured by the detection unit (6a) or a measurement value that is a reflection amount with respect to light measured by the detection unit (6a). The dust filter (5b) where the paper piece (C) is not present is compared to detect the paper piece (C). When the detection unit (6a) is an area camera, the measurement value is a reflection image. In the present invention, the measurement value is also described for the captured image.

The detecting means (6) is arranged inside the collecting means (4) or outside adjacent to the side wall of the collecting means (4) having an imaging window (4a). As described above, the paper piece (C) removed by the paper piece removing means (3) falls in the collecting means (4), and paper dust is prevalent. Therefore, when the detection means (6) is provided in the collection means (4), the paper piece (C) is prevented from dropping onto the dust collection filter (5b), and paper dust adheres to the detection means (6). May prevent operation.

Therefore, the detecting means (6) is provided outside the collecting means (4) and the paper piece (C) is detected from the transparent imaging window (4a) installed on the side wall of the collecting means (4). Is preferred.

By capturing the dust collection filter (5b) from the outside of the collecting means (4) through the transparent imaging window (4a), the dust collection filter (5b) can be imaged without being affected by paper dust, and the dust collection filter ( There is also no possibility of disturbing the fall to 5b).

The detection means (6) may further have a function of removing paper dust attached to the imaging window (4a) and / or the detection unit (6a). For example, it is possible to prevent malfunction of the detection unit (6a) by providing an air nozzle in the vicinity of the imaging window (4a) and / or the detection unit (6a) and removing paper dust by injecting air. It becomes. The details of the paper dust removing function (mechanism) installed in the detection means (6) are described in Japanese Patent No. 4811737 filed by the present applicant, and thus the description thereof is omitted.

The control section (11) is a means for controlling the operation of each means constituting the paper piece removing device (M) in addition to the means for detecting the paper piece (C).

  FIG. 8 is a schematic diagram illustrating a case where the detection unit (6a) is an optical sensor. First, the initial value of the output (empty reading data) of the optical sensor when no paper piece (C) is present is set in advance as a reference value and stored in the control unit (11).

When the paper piece removing device (M) is in operation, the output value of the detection unit (6a), which is an optical sensor, is measured, and then the output value is always transferred to the control unit (11). Next, the control unit (11) compares the reference value with the measured value. If the difference between the reference value and the measured value at the time of comparison is equal to or greater than the specified value, it is determined that a piece of paper (C) has occurred. The light sensor is a light reflection sensor.

FIG. 9 is a schematic diagram showing a case where the detection unit (6a) is an area camera. First, the reflection image of the dust collection filter (5b) when the paper piece (C) is not present is preset as a reference value and stored in the control unit (11).

When the paper piece removing device (M) is in operation, after the reflected image is captured by the detection unit (6a), which is an area camera, the captured image is always transferred to the control unit (11). Next, the control unit (11) compares the captured image as the reference value and the measurement value. When the difference value between the reference value and the measured value at the time of comparison is equal to or greater than the specified value, it is determined that a piece of paper (C) has occurred.

In FIG. 9, the detection unit (6a), which is an area camera, can capture an image after ensuring a field of view that allows the entire dust collection filter (5b) to be imaged through a transparent imaging window (4a) provided in the recovery means (4). However, the present invention is not limited to this as long as the reflected image on the dust collection filter (5b) can be captured, and the collection means (4) itself can be a transparent structure.

Moreover, you may provide a warning part (6b) in a detection means (6) further. The alarm unit (6b) is a means for issuing an alarm by visual and / or auditory sense, such as a buzzer or a lamp, and is installed in connection with the control unit (11).

By providing the alarm unit (6b), when the paper piece (C) is detected by the detection unit (6a), the detection signal is transferred to the alarm unit (6b) via the control unit (11). By issuing an alarm such as a buzzer sounding or a lamp lighting, it is possible to find a piece of paper (C) at an early stage even when the operator is in another work.

When detecting the paper piece (C), the control unit (11) stops the operation of the transport belts (1a, 2a) to automatically stop the transport of the paper (S), or the control unit ( In 11), the driving of the entire machine may be stopped. By stopping the conveyance and the machine, it is possible to prevent the paper piece (C) from escaping in the paper piece removing device (M) at an early stage. Furthermore, it is good also as a structure which uses together with the alarm part (6b) mentioned above, and at the time of the detection of a paper piece (C), issues a warning by the control part (11) and stops the machine.

In the conveyors (1, 2), in order to reduce the flapping of the paper (S) being conveyed, a plurality of suction holes are provided in the conveyor belt (1a, 2a), and the conveyor belt (1a, 2a) The sheet (S) may be conveyed while sucking the lower surface of the contacting sheet (S). In FIG. 2, two rollers (1b, 2b) are arranged on the conveyors (1, 2). However, the position and number of rollers (1b, 2b) are not limited to this. Can be appropriately selected according to the size of the conveyor, the conveyance speed, and the like.

The upstream conveyor (1) further includes an inclined belt (7) for positioning the paper (S) in a direction perpendicular to the transport direction (V) of the paper (S), and the transport direction of the paper (S). You may provide the horizontal ruler (8) which correct | amends the curvature with respect to (V).

FIG. 10 is a schematic diagram for explaining the inclined belt (7) and the horizontal ruler (8). The inclined belt (7) is positioned obliquely with respect to the conveyance direction (V) of the paper (S), thereby positioning in the conveyance direction (V) and the direction perpendicular to the conveyance direction (V). Is possible. On the side surface of the horizontal ruler (8), as shown by a dotted line, a guide groove is provided in which one side parallel to the conveyance direction of the sheet (S) can enter.

After the sheet (S) is conveyed in the same direction as the inclined belt (7), it contacts the horizontal ruler (8) parallel to the conveyance direction (V) of the sheet (S), and one side of the sheet (S) Is conveyed in contact with the horizontal ruler (8), whereby the position of the sheet (S) in the direction perpendicular to the conveying direction (V) of the sheet (S) can be determined. Further, it is possible to correct the bending of the sheet (S) by conveying the sheet (S) while one side of the sheet (S) is in contact with the horizontal ruler (8).

When the paper piece removing means (3) is a means for removing the paper piece (C) attached to the paper (S) by contact, the contact force of the paper piece removing means (3) to the paper (S) is increased. Thus, the paper (S) being conveyed slips, and a conveyance failure may occur. In this case, it is preferable to provide a paper pressing means (10) such as a roller (not shown) and a paper pressing ball on the transport path of the upstream conveyor (1). By installing the paper pressing means (10), it becomes possible to stably convey the paper (S) while being sandwiched between the paper pressing means (10) and the conveying belt (1a).

  FIG. 11 is a schematic view showing the paper pressing means (10). FIG. 11 (a) is a plan view and FIG. 11 (b) is a side view. The paper pressing tool presses the paper (S) against the transport belt (1a) by its own weight. The rotational motion of the transport belt (1a) can be reliably transmitted to the paper (S), and the paper (S) is stably transported in synchronization with the transport belt (1a).

The paper retainer ball holds the paper retainer ball (10c) at substantially the same position by the paper retainer ball guide (10b) having the holding hole (10a). By changing the paper presser ball (10c) to a material having a different weight, such as iron or plastic, it is possible to adjust the force for pressing the paper (S) against the transport belt (1a). The diameter of the holding hole (10a) is slightly larger than the diameter of the paper presser ball (10c). Therefore, the paper presser ball (1c) freely rotates with the rotation of the transport belt (1a).

Note that the inclined belt (7) is positioned in the conveying direction (V) and in the direction perpendicular to the conveying direction (V) by being disposed in an oblique direction with respect to the conveying direction (V) of the sheet (S) described above. ) Is provided on the upstream conveyor (1), the paper pressing means (10) is provided at a position facing the inclined belt (7) with respect to the transport path.

  In FIG. 1, four conveyor belts (1a) are provided, but the smaller contact area between the conveyor belt (1a) and the paper (S) is between the conveyor belt (a) and the paper (S). Since the paper piece (C) is not sandwiched, it is preferable. Therefore, it is sufficient that at least one conveyor belt (1a) is provided. In addition, when the above-described inclined belt (7) and the paper pressing ball are provided, the inclined belt (7) may be replaced with the conveying belt (1a).

DESCRIPTION OF SYMBOLS 1 Upstream conveyor 2 Downstream conveyor 1a, 2a Conveyor belt 1b, 2b Roller 3 Paper piece removal means 3a Brush 3b Air chamber 4 Collecting means 4a Imaging window 5 Suction means 5a Suction blower 5b Dust collection filter 5c Storage box 6 Detection means 6a Detection Section 6b Alarm section 7 Inclined belt 8 Horizontal ruler 9 Paper guide 10 Paper holding means 11 Control section S Paper C Paper piece M Paper piece removal device

Claims (4)

An apparatus for removing a piece of paper generated when the sheet is cut to a predetermined size and having a conveying unit configured to convey a sheet cut to a predetermined size;
Means for removing the piece of paper disposed above and / or below the conveyor and non-contacting the whole surface and / or the entire back surface of the paper with a scraping member and / or blowing air;
Below the conveyor, disposed with openings at the top and bottom, and dropping the paper pieces removed by the paper piece removing means from the top opening to the bottom opening and collecting the means,
A paper piece placing means provided with a dust collecting filter placed on the bottom opening of the collecting means and placing the paper piece;
The dust collection filter which is disposed in the collection means or outside adjacent to the collection means with an imaging window and is optically measured on the dust collection filter and the preset paper piece does not exist. A paper piece removing apparatus comprising at least means for comparing the measured values and detecting the paper piece.   2. The paper piece removing device according to claim 1, wherein the paper piece placing means comprises a suction blower below the dust collecting filter in order to suck the paper pieces dropped into the collecting means. The paper piece removing device according to claim 1 or 2, wherein the paper piece removing means is a brush and / or an air chamber. The paper piece removing apparatus according to any one of claims 1 to 3, wherein the detecting means has a function of stopping an alarm and / or a machine when the paper piece is detected.

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