Paper disorder detection mechanism of sheet-fed drum-type ink-jet printer

Abstract

A paper disorder detection mechanism for a sheet-fed drum-type ink-jet printer relates to the technical field of printing equipment and comprises a rack and a power device, a drum for conveying paper is rotatably mounted on the rack, and the drum is controlled by the power device; a cam is rotationally mounted on the rack, the cam is located above the roller in the vertical direction, a vertically-arranged detection plate is mounted on the cam, and the bottom end of the detection plate is arranged close to the roller; a gap adjusting assembly matched with the detection plate is arranged on the upstream portion of the detection plate and used for adjusting the distance between the bottom end of the detection plate and the outer wall of the roller. A detection switch and an elastic reset piece which are matched with the cam are installed on the machine frame. The paper conveying stability can be improved, it is guaranteed that only single paper passes through each time, the printing quality is improved, the structure is simple, and maintenance is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to printing equipment technical field especially relates to a single sheet cylinder type inkjet printing machine paper mess detection mechanism. BACKGROUND

[0002] Single sheet cylinder type inkjet printing machine can realize single side printing or double side printing operation according to customer printing demand, and requires high positioning accuracy of paper during single sheet inkjet printing process.

[0003] Most of the cylinder type inkjet printing machines in prior art adopt cylinder to bear and hand over and convey paper, and the paper transmission and hand over between units are completed by the paper holding tooth row on the printing cylinder, paper conveying cylinder or conveying chain. The printing cylinder is used to bear the paper to complete the printing operation, and the paper is adsorbed on the surface of the printing cylinder and rotates with the cylinder when the paper is transmitted to the printing cylinder by the tooth, and the inkjet head is arranged above the printing cylinder. When the paper rotates with the printing cylinder to the lower side of the inkjet head, the inkjet head performs printing operation on the paper.

[0004] The inkjet printing machine can only allow single sheet continuous conveying when printing the paper, and if there is multiple paper overlapping conveying, it will cause printing error and affect the printing quality. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model wants to solve the technical problem, provides a single sheet cylinder type inkjet printing machine paper mess detection mechanism, can improve the paper conveying stability, ensures that only single paper passes each time, improves the printing quality, and the structure is simple, and is convenient for maintaining.

[0006] To solve the above technical problem, the technical scheme of the utility model is:

[0007] A single sheet cylinder type inkjet printing machine paper mess detection mechanism, including frame and power device, the frame is rotationally installed with cylinder for conveying paper, and the cylinder is controlled by the power device;

[0008] The cam is rotationally installed on the frame and is located above the cylinder in the vertical direction, a detection plate is installed on the cam in the vertical direction, and the bottom end of the detection plate is located close to the cylinder;

[0009] A gap adjustment assembly is arranged on the upstream of the detection plate and is matched with the detection plate, and the gap adjustment assembly is used to adjust the distance between the bottom end of the detection plate and the outer wall of the cylinder;

[0010] The detection switch and the elastic reset member matched with the cam are installed on the frame.

[0011] Preferably, the cam is rotatably installed on the frame by a cam shaft, and the cam is provided with a containing groove matched with the detection switch.

[0012] Preferably, the detection switch is a microswitch, and the detection switch comprises a switch body, a slide rod is slidably arranged on the switch body, the slide rod is arranged towards the cam and the end of the slide rod abuts in the containing groove.

[0013] Preferably, the two sides of the containing groove are respectively provided with an upper arc surface and a lower arc surface, and the upper arc surface and the lower arc surface are matched with the slide rod.

[0014] Preferably, the switch body is installed on a switch seat, and the switch seat is adjustably installed on the frame along the paper conveying direction.

[0015] Preferably, the detection plate comprises an integrated mounting portion and a detection portion.

[0016] The mounting portion is vertically arranged and fixedly connected with the cam, and the mounting portion abuts with the gap adjusting assembly.

[0017] The detection portion is located below the mounting portion, and the detection portion is obliquely arranged downstream of the cylinder along the paper conveying direction.

[0018] Preferably, the gap adjusting assembly comprises an adjusting seat, the adjusting seat is installed on the frame, and a position-adjustable gap adjusting screw is threadedly connected on the adjusting seat.

[0019] The gap adjusting screws are arranged in the same direction along the paper conveying direction, and the ends of the gap adjusting screws abut with the mounting portion.

[0020] Preferably, the elastic reset member is a reset tension spring.

[0021] Preferably, a connecting bolt is vertically installed on the top of the cam, one end of the elastic reset member is installed on the connecting bolt, and the other end of the elastic reset member is installed on the frame.

[0022] After the above technical scheme is adopted, the beneficial effects of the present application are as follows:

[0023] Thanks to the paper disorder detection mechanism, the frame and the power device, the cylinder for conveying paper is rotatably installed on the frame and is controlled by the power device; the cam is rotatably installed on the frame and is vertically located above the cylinder, the detection plate is vertically installed on the cam, and the bottom end of the detection plate is close to the cylinder; when the paper is conveyed through the cylinder in the form of multiple papers, the thickness of the multiple papers is greater than that of the single paper, thus the multiple papers overlapped together can touch the detection plate and drive the cam to rotate.

[0024] The upstream of the detection plate is provided with a gap adjustment assembly matched with the detection plate, and the gap adjustment assembly is used for adjusting the distance between the bottom end of the detection plate and the outer wall of the cylinder.

[0025] The rack is provided with a detection switch matched with the cam and an elastic reset member. When the cam is rotated by the detection plate, the detection switch can be driven to send a detection signal to prompt that multiple papers pass at the same time, so as to meet the detection requirement. When the multiple papers pass at the same time is eliminated, the elastic reset member can drive the cam to reset, and the detection can be continued. By adopting the detection plate, the cam, the gap adjustment assembly, the detection switch and the elastic reset member, the paper feeding stability can be improved, and only one paper passes each time, so that the printing quality is improved, and the structure is simple and convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0026] The utility model will be further explained in connection with the drawings and examples.

[0027] Figure 1 It is the structure schematic diagram of single paper cylinder type ink-jet printing machine paper disorder detection mechanism of the utility model example;

[0028] In the drawing:

[0029] 1, cylinder;

[0030] 2, cam; 21, cam shaft; 22, upper arc surface; 23, lower arc surface; 24, connecting bolt;

[0031] 3, detection plate; 31, mounting portion; 32, detection portion;

[0032] 4, gap adjustment assembly; 41, adjustment seat; 42, gap adjustment screw;

[0033] 5, detection switch; 51, switch body; 52, sliding rod; 53, switch seat;

[0034] 6, elastic reset member. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model will be further explained in connection with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0036] For example, Figure 1As shown, the utility model discloses a rack and power device, the rack is rotatably installed with the cylinder 1 for conveying paper, and the cylinder 1 is controlled to power device, and the rack and power device are the known technology in the prior art, and here will not repeat.

[0037] The cam 2 is rotatably installed on the rack, and the cam 2 is located above the cylinder 1 along the vertical direction, the detection plate 3 is vertically arranged on the cam 2, and the bottom end of the detection plate 3 is arranged close to the cylinder 1, when the paper is conveyed through the cylinder 1 in the form of multiple sheets, the thickness of the multiple sheets is greater than the thickness of the single sheet, so that the multiple sheets overlapped together can touch the detection plate 3 and drive the cam 2 to rotate.

[0038] The upstream of the detection plate 3 is provided with the gap adjusting assembly 4 matched with the detection plate 3, and the gap adjusting assembly 4 is used for adjusting the gap between the bottom end of the detection plate 3 and the outer wall of the cylinder 1, the thickness of different paper is also different, and the detection plate 3 can realize detection on paper with different thickness by adjusting the gap adjusting assembly 4.

[0039] The rack is provided with the detection switch 5 matched with the cam 2 and the elastic reset member 6.

[0040] In use, the paper is conveyed by the cylinder 1, and only one paper can be conveyed each time, so that the printing requirement is met and the printing quality is ensured, when multiple papers are conveyed together or the overlap of two papers occurs, the height of the multiple papers is greater than the height of the single paper, the detection plate 3 can be driven to move downstream, and the cam 2 is rotated, when the cam 2 is driven to rotate by the detection plate 3, the detection switch 5 can be driven to send a detection signal, the current situation that multiple papers pass through at the same time is prompted, the detection requirement is met, and when the situation of multiple papers is eliminated, the elastic reset member 6 can drive the cam 2 to reset and continue to detect, the detection plate 3, the cam 2, the gap adjusting assembly 4, the detection switch 5 and the elastic reset member 6 are matched with each other, the paper conveying stability is improved, and only single paper passes through each time, so that the printing quality is improved, and the structure is simple and convenient to maintain.

[0041] In the application, the cam 2 is rotatably installed on the rack through the cam shaft 21, and the cam 2 is provided with the accommodating groove matched with the detection switch 5.

[0042] When the cam 2 rotates around the cam shaft 21, the slide rod 52 can be driven to slide to the side close to the switch body 51, so that the inside of the switch body 51 generates a detection signal, in order to improve the sliding effect of the slide rod 52 and reduce the sliding difficulty, the two sides of the accommodating groove are respectively provided with the upper arc surface 22 and the lower arc surface 23, and the upper arc surface 22 and the lower arc surface 23 are matched with the slide rod 52.

[0043] Preferably, the switch body 51 is installed on the switch seat 53, and the switch seat 53 is installed on the rack in a position adjustable along the paper conveying direction. By additionally arranging the switch seat 53, the installation of the detection switch 5 is facilitated, and especially, the position of the switch seat 53 is adjustable, so that the abutting strength of the slide rod 52 abutting in the accommodating groove can be adjusted by adjusting the position of the switch seat 53, the pressure of the slide rod 52 applied to the cam 2 is adjusted, and the detection sensitivity of the detection switch 5 is adjusted.

[0044] The detection plate 3 comprises an integral mounting portion 31 and a detection portion 32; the mounting portion 31 is vertically arranged and fixedly connected with the cam 2, and the mounting portion 31 abuts against the gap adjusting assembly 4; the detection portion 32 is located below the mounting portion 31 and is arranged to be inclined to the downstream of the cylinder 1 along the paper conveying direction.

[0045] The gap adjusting assembly 4 comprises an adjusting seat 41 installed on the rack, and the position-adjustable gap adjusting screw 42 is threadedly connected to the adjusting seat 41; the gap adjusting screw 42 is arranged in the same direction along the paper conveying direction, and the end portion of the gap adjusting screw 42 abuts against the mounting portion 31. By screwing the gap adjusting screw 42, the gap adjusting screw 42 drives the mounting portion 31 to move to the downstream of the cylinder 1 or cooperates with the elastic reset member 6 to drive the mounting portion 31 to move to the upstream of the cylinder 1, so that the distance between the detection portion 32 and the cylinder 1 is adjusted, and the detection of paper with different thicknesses is realized.

[0046] Preferably, the elastic reset member 6 is a reset tension spring. The top of the cam 2 is vertically provided with a connecting bolt 24, one end of the elastic reset member 6 is installed on the connecting bolt 24, and the other end of the elastic reset member 6 is installed on the rack.

[0047] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A paper misprint detection mechanism for a sheet-fed roller inkjet printer, comprising a frame and a power unit, wherein a roller for conveying paper is rotatably mounted on the frame, and the roller is controlled by the power unit; characterized in that, A cam is rotatably mounted on the frame. The cam is vertically positioned above the roller. A vertically arranged detection plate is mounted on the cam, with the bottom end of the detection plate positioned close to the roller. A gap adjustment component adapted to the upstream of the detection plate is provided, and the gap adjustment component is used to adjust the distance between the bottom end of the detection plate and the outer wall of the roller; The frame is equipped with a detection switch and an elastic reset component that are compatible with the cam; The cam is rotatably mounted on the frame via a camshaft, and the cam is provided with a receiving groove adapted to the detection switch; The detection switch is a tactile switch, which includes a switch body and a slide rod slidably disposed on the switch body. The slide rod is positioned toward the cam and its end abuts against the receiving groove. The receiving groove is provided with an upper arc-shaped surface and a lower arc-shaped surface on both sides, and the upper arc-shaped surface and the lower arc-shaped surface are adapted to the sliding rod; The elastic reset element is a reset tension spring.

2. The sheet-fed roller inkjet printing press paper misprint detection mechanism as described in claim 1, characterized in that, The switch body is mounted on a switch base, and the switch base is mounted on the frame in an adjustable position along the paper feeding direction.

3. The sheet-fed roller inkjet printing press paper misprint detection mechanism as described in claim 1, characterized in that, The detection plate includes an integrally formed mounting part and a detection part; The mounting part is vertically arranged and fixedly connected to the cam, and the mounting part abuts against the gap adjustment component; The detection unit is located below the mounting unit and is inclined downstream of the roller along the paper conveying direction.

4. The sheet-fed roller inkjet printing press paper misprint detection mechanism as described in claim 3, characterized in that, The gap adjustment assembly includes an adjustment seat, which is mounted on the frame, and the adjustment seat is threaded with a position-adjustable gap adjustment screw; The gap adjustment screws are arranged in the same direction along the paper feeding direction, and the end of the gap adjustment screws abuts against the mounting part.

5. The sheet-fed roller inkjet printing press paper misprint detection mechanism as described in claim 1, characterized in that, A connecting bolt is vertically mounted on the top of the cam, one end of the elastic reset member is mounted on the connecting bolt, and the other end of the elastic reset member is mounted on the frame.

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