JP2005193509A - Detecting device for abnormality in feeding of sheetlike matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To lighten the burden of an operator and to reduce the total cost for a reflector. <P>SOLUTION: The reflector 7 is provided on a gripper support bar 6 provided in a notch 3 of an impression cylinder 1. At a prescribed rotational angle position of the impression cylinder 1, the light from a projector of a return reflection type photoelectric sensor 11 is reflected by the reflector 7 and received by a receiver. The presence or absence of a paper sheet 5 re-gripped by grippers 4 is detected by the sensor 11 so as to detect paper dropping. The reflector 7 is laminated with a PET resin having a high solvent resistance and high transparency. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sheet-like material feeding abnormality detection device for detecting a so-called paper dropping phenomenon in which a sheet falls without being held in a sheet-fed rotary printing press or the like.

A conventional sheet-like material feeding abnormality detection device is provided with a reflection plate for detecting a paper drop in a notch of a conveyance cylinder, and a first sensor for detecting a paper drop by receiving reflected light from the reflection plate; And a second sensor for detecting dirt on the reflecting plate, and even if the surface of the reflecting plate is dirty, the first sensor accurately detects paper dropping (for example, Patent Document 1). reference). In addition, the applicant could not find any prior art documents closely related to the present invention by the time of filing other than the prior art documents specified by the prior art document information described in the present specification. .
JP 2000-15786 A (paragraphs “0014”, “0020”, FIGS. 1 and 2)

  In the above-described conventional sheet-like material feeding abnormality detection device, it is possible to prevent erroneous detection due to contamination of the reflector. However, when the cleaning solvent such as thinner used when cleaning the impression cylinder adheres to the surface of the reflector, the material of the reflector (plastic) itself changes in quality, and the surface of the reflector becomes cloudy and functions as a reflector. It may stop working. This is particularly noticeable when a UV ink cleaning solvent must be used. If the material changes in quality in this way, even if the reflecting plate is washed, it will not function as a reflecting plate. Therefore, the reflecting plate itself must be frequently replaced every time it is washed. For this reason, there is a problem that not only the burden on the operator is increased, but also the total cost for the reflector is increased.

  As a solution to this problem, as shown in FIG. 4, the reflective plate 7 fixed to the claw bar 6 provided on the conveying cylinder is covered with an acrylic lid 15, and filling adhesion surrounding the lid 15 is performed. A structure in which the lid 15 is fixed by the agent 16 and the cleaning solvent 17 is prevented from adhering to the surface of the reflector 7 has been proposed. However, in this structure, it is difficult to completely fix the lid 15, and there is a possibility that a gap may be generated, or because the filling adhesive 16 is melted by long-term use, etc., the cleaning solvent Intrusion of 17 into the reflector 7 was not necessarily prevented.

  The present invention has been made in view of the above-described conventional problems, and a first object is to reduce the burden on the operator. The second object is to reduce the total cost of the reflector.

  In order to achieve this object, the invention according to claim 1 includes a conveyance cylinder for holding and conveying a sheet-like material, and a reflecting member disposed at a position covered by the sheet-like material held on the conveyance cylinder. In addition, in the sheet-like material feeding abnormality detection device including the projector and the sheet-like material detection device configured to receive the light reflected by the reflection member, the reflection member has high solvent resistance. It is sealed with a material having high transparency.

  The invention according to claim 2 is the invention according to claim 1, wherein the material is a resin, and the reflecting member is sealed by laminating with the resin.

  According to a third aspect of the present invention, there is provided a conveying cylinder for holding and conveying a sheet-like material, a reflecting member disposed at a position covered by the sheet-like material held on the conveying cylinder, a light projector and the reflecting member to reflect In the sheet-like material anomaly detection device including a sheet-like material detection device configured to receive the received light, the reflection member is sealed with polyethylene terephthalate resin.

  According to a fourth aspect of the present invention, there is provided a conveying cylinder for holding and conveying a sheet-like material, a reflecting member disposed at a position covered by the sheet-like material held by the conveying cylinder, a projector and a reflection by the reflecting member. In the sheet-like material anomaly detection device comprising a sheet-like material detection device configured to receive a received light, the reflecting member is sealed with polyvinyl chloride.

  According to a fifth aspect of the present invention, there is provided a conveying cylinder for holding and conveying a sheet-like material, a reflecting member disposed at a position covered by the sheet-like material held on the conveying cylinder, a projector, and a reflection by the reflecting member. In the sheet-like material anomaly detection device including the sheet-like material detection device configured to receive the received light, the reflection member is sealed with polycarbonate resin.

  According to a sixth aspect of the present invention, there is provided a conveying cylinder for holding and conveying a sheet-like material, a reflecting member disposed at a position covered by the sheet-like material held on the conveying cylinder, a light projector and the reflecting member for reflection. In the sheet-like material feeding abnormality detecting device provided with a sheet-like material detecting device configured to receive a received light, the reflecting member is sealed with acrylic resin.

  According to the present invention, since the frequency of replacement of the reflecting plate is reduced, not only the burden on the operator can be reduced, but also the total cost of the reflecting plate can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1A is a side view of a sheet-like material abnormality detection device according to the present invention, FIG. 1B is a view taken in the direction of arrow I (b) in FIG. 1A, and FIG. FIG. 3A is a plan view, FIG. 3B is a side view, FIG. 3 shows a main part for explaining the detection operation, and FIG. FIG. 4B shows a state where the absence of paper is detected. In these drawings, the reflecting plate 7 is hatched for convenience of explanation.

  The impression cylinder denoted by reference numeral 1 in FIG. 1 is rotatably supported between the left and right frames (not shown) of the sheet-fed rotary printing press with a reversing mechanism so as to contact the reversing cylinder 2. A notch 3 extending in the axial direction is provided in the peripheral portion of the impression cylinder 1, and a plurality of claws 4 that hold the paper P together with the claw base 5 are provided in the notch 3. As shown in b), the pressure drum 1 is provided at a predetermined interval in the axial direction.

  In FIG. 2, reference numeral 7 denotes a reflector, which is formed into a flat cube with plastic and has fine irregularities on its surface. The whole is highly solvent-resistant and highly transparent polyethylene terephthalate (PET) by lamination. ) Sealed by covering with resin 8. Reference numeral 9 denotes a pressing piece formed of a thin spring material, and is provided so as to be bent at a right angle to the base portion 9a provided with the long hole 9c and spaced apart by a distance D in plan view. A pair of presser portions 9b, 9b are integrally formed. The distance D between the presser portions 9b and 9b is formed slightly smaller than the width W of the reflecting plate 7.

  The reflecting plate 7 is placed on a claw bar 6 provided in the notch 3, and the holding portions 9b and 9b of the holding piece 9 are placed on the reflecting plate 7 so that the long hole of the base portion 9a is placed. By screwing the bolt 10 inserted through 9c into the screw hole 6a of the claw base bar 6, the reflecting plate 7 is fixed so as to be pressed onto the claw base bar 6 by the holding portions 9b, 9b. Thus, the reflector 7 fixed on the claw base bar 6 by the presser piece 9 has an area formed by the distance D between the presser portions 9b and 9b and the total length L1 of the reflector plate 7 in the presser portion 9b, It is exposed from between 9b.

  In FIG. 3, reference numeral 11 denotes a retroreflective photoelectric sensor as a sheet-like object detection device provided with a projector and a light receiver that has been widely known in the past. As shown in FIG. Is positioned at the rotation angle, the light from the projector irradiates the reflection plate 7 and the light reflected by the reflection plate 7 is received by the light receiver. Z).

  In the retroreflective photoelectric sensor 11, the paper P is replaced by the claw 4 of the reversing cylinder 2 and the claw 4 of the impression cylinder 1, and the impression cylinder 1 is positioned at a predetermined rotation angle as shown in FIG. Then, the paper P blocks between the regressive reflection type photoelectric sensor 11 and the reflection plate 7. Therefore, the light from the projector of the regressive reflection type photoelectric sensor 11 is not blocked by the paper P and does not reach the reflecting plate 7, so that it is not received by the light receiver. As described above, when there is no light reception by the light receiver of the retroreflective photoelectric sensor 11 even though the impression cylinder 1 is positioned at a predetermined rotation angle, the control unit of the printing press (not shown) 4, it is determined that the paper P is added.

  On the other hand, when the impression cylinder 1 is positioned at a predetermined rotation angle as shown in FIG. 5B, there is nothing that blocks light from the projector between the retroreflective photoelectric sensor 11 and the reflection plate 7. Then, the light projected from the projector of the retroreflective photoelectric sensor 11 irradiates the reflecting plate 7 and is reflected by the reflecting plate 7 to be received by the light receiver. That is, when the impression cylinder 1 is positioned at a predetermined rotation angle and the light projected from the light projector of the retroreflective photoelectric sensor 11 is received by the light receiver, the control unit of the printing press (not shown) Therefore, it is determined that the paper P cannot be replaced from the claw of the reversing cylinder 2 to the claw 4 of the impression cylinder 1 and there is a paper drop.

  Here, since the entire reflection plate 7 is covered and sealed with a PET resin having a high solvent resistance, the cleaning solvent can be prevented from entering the PET resin 8 when the impression cylinder 1 is cleaned. Therefore, the cleaning solvent does not adhere to the surface of the reflector 7. Therefore, since the material of the reflecting plate 7 is not changed by the cleaning solvent, it is not necessary to replace the reflecting plate 7 frequently, so that the burden on the operator can be reduced. Such total cost can also be reduced.

  In addition, since the entire reflecting plate 7 is covered with the highly transparent PET resin 8, the PET resin 8 does not reduce the reflecting surface area of the reflecting plate 7. For this reason, the reflective surface area of the reflecting plate 7 can be ensured to the maximum in a limited installation space, and a reliable inspection can be performed.

  In the present embodiment, the reflecting plate 7 is laminated with the PET resin 8, but the material for sealing the reflecting plate 7 may be polyvinyl chloride, polycarbonate resin, acrylic resin, or the like. In short, any material having high solvent resistance and high transparency may be used. Further, the sealing may be performed by laminating the entire reflecting plate 7 with a sheet-like resin, or dipping the entire reflecting plate 7 in a liquid sealing material and drying the sealing material. In short, it is sufficient to cover the reflector 7 so that the cleaning solvent does not enter. In the present embodiment, the example in which the reflecting plate 7 is provided on the impression cylinder 1 has been shown. However, the reflector 7 can also be implemented on the reversing cylinder 2 or the transfer cylinder. If it is. Further, although the sheet-like material is the paper P, a film-like sheet may be used. Further, the presser piece 9 is used to fix the reflecting plate 7 to the nail base bar 6, but the present invention is not limited thereto, and an adhesive is used, or the PET resin 8 is heated and directly welded onto the nail base bar 6. You may do it.

FIG. 4A is a side view of a sheet-like material feeding abnormality detection device according to the present invention, and FIG. 4B is a view taken in the direction of arrow I (b) in FIG. The principal part of the sheet | seat material feed abnormality detection apparatus which concerns on this invention is expanded and shown, The figure (a) is a top view, The figure (b) is a side view. The main part for demonstrating a detection operation | movement in the sheet | seat material feed abnormality detection apparatus based on this invention is shown, The figure (a) shows the state which detects the presence of paper, The figure (b) detects the absence of paper. Indicates the state to be performed. The principal part of the conventional sheet | seat-like material feed abnormality detection apparatus is expanded and shown, The figure (a) is a top view, The figure (b) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Impression cylinder, 2 ... Inversion cylinder, 3 ... Notch, 4 ... Nail | claw, 6 ... Claw stand bar, 7 ... Reflecting plate, 8 ... PET resin, 9 ... Pressing piece, 11 ... Regression reflection type photoelectric sensor, P ... paper.

Claims (6)

A transport cylinder for holding and transporting the sheet-like material;
A reflecting member disposed at a position covered by the sheet-like material held on the conveying cylinder;
In a sheet-like material feeding abnormality detecting device comprising a projector and a sheet-like material detecting device configured to receive light reflected by the reflecting member,
An apparatus for detecting abnormality in feeding a sheet-like material, wherein the reflecting member is sealed with a material having high solvent resistance and high transparency. In the apparatus for detecting abnormalities in feeding a sheet-like object according to claim 1,
An apparatus for detecting abnormal sheet feeding, wherein the material is resin, and the reflecting member is sealed by laminating with the resin. A transport cylinder for holding and transporting the sheet-like material;
A reflecting member disposed at a position covered by the sheet-like material held on the conveying cylinder;
In a sheet-like material feeding abnormality detecting device comprising a projector and a sheet-like material detecting device configured to receive light reflected by the reflecting member,
An apparatus for detecting abnormal sheet feeding, wherein the reflecting member is sealed with polyethylene terephthalate resin. A transport cylinder for holding and transporting the sheet-like material;
A reflecting member disposed at a position covered by the sheet-like material held on the conveying cylinder;
In a sheet-like material feeding abnormality detecting device comprising a projector and a sheet-like material detecting device configured to receive light reflected by the reflecting member,
An apparatus for detecting abnormal feeding of a sheet-like material, wherein the reflecting member is sealed with polyvinyl chloride. A transport cylinder for holding and transporting the sheet-like material;
A reflecting member disposed at a position covered by the sheet-like material held on the conveying cylinder;
In a sheet-like material feeding abnormality detecting device comprising a projector and a sheet-like material detecting device configured to receive light reflected by the reflecting member,
An apparatus for detecting abnormal feeding of a sheet-like material, wherein the reflecting member is sealed with polycarbonate resin. A transport cylinder for holding and transporting the sheet-like material;
A reflecting member disposed at a position covered by the sheet-like material held on the conveying cylinder;
In a sheet-like material feeding abnormality detecting device comprising a projector and a sheet-like material detecting device configured to receive light reflected by the reflecting member,
An apparatus for detecting an abnormality in feeding a sheet-like material, wherein the reflecting member is sealed with an acrylic resin.

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