JP4610232B2 - Paper discharge / paper receiving device - Google Patents

Description

  The present invention relates to a paper discharge / paper receiving apparatus, and relates to a technique for receiving paper discharged from a mechanical device that performs predetermined processing on paper such as a printer and a printing machine.

  Conventionally, as a printing apparatus, for example, there is one shown in FIG. In the apparatus main body 1, a plate making / plate feeding mechanism unit 3, a plate discharging mechanism unit 4, a sheet feeding mechanism unit 5, and a sheet discharging mechanism unit 6 are arranged around a plate cylinder 2.

  The plate making / plate feeding mechanism unit 3 feeds an unmade base paper 8 from the master roll 7 and forms it on the base paper 8 by the thermal head 10 based on the image data of the original read by the scanner mechanism unit 9 disposed on the upper part of the apparatus main body 1. The base paper 8 which has been perforated to make a plate is fed to the plate cylinder 2. The plate removal mechanism 4 pulls the base paper 8 between the pair of upper and lower drawing rollers 11 and 12 and winds the base paper 8 with the winding core 13.

  The paper feed mechanism unit 5 takes out the paper 15 placed on the paper feed tray 14 by the paper feed roller 16, and feeds the paper to the position between the base paper 8 and the press roller 19 by the timing roller 17 and the guide roller 18. Then, printing is performed on the paper surface by the rotation of the base paper 8. The paper discharge mechanism 6 peels off the printed paper 15 from the base paper 8 by the paper peeler 20 and discharges it onto the print tray 21.

  As a technique related to the print tray 21, for example, there is one described in Patent Document 1. This is as shown in FIG. 12, and the main wall plate 32 is erected on the substrate 31 of the paper discharge tray 30. The main wall plate 32 is provided with an abutting body 34 that stands on the path of the printing paper 33, and the upper end portion of the abutting body 34 is fixed to the main wall plate 32, and the lower end portion of the abutting body 34 is open in the opening of the substrate 31. It is fitted.

  The abutting body 34 is arranged to drop and align the printing paper 33 downward without being bounced or caught by vibrating according to the collision force of the printing paper 33, and the relatively thin printing paper 33 is made of a damping member. Even when it strikes the vehicle, the rigidity is set such that it vibrates slightly in the opening while shaking, and a vibration damping member 35 having an elastic absorption force is provided at the collision position to reduce the collision noise.

  The printed printing paper 33 discharged from the printer flies over the substrate 31, the leading end thereof hits the vibration damping member 35 of the abutting body 34, is prevented from progressing, and falls onto the substrate 31. At this time, if the abutting body 34 is in a completely non-seismic state, the leading end portion of the printing paper W is caught by the frictional resistance between the vibration damping member 35 and the working surface of the abutting body 34 and does not slide down smoothly. The low-stiff print paper 33 is loaded in a curved state.

  Actually, most of the kinetic energy of the printing paper W colliding with the vibration damping member 35 is absorbed, and the kinetic energy of the printing paper 33 that is not completely absorbed by the vibration damping member 35 vibrates the abutting body 34, and the leading edge of the printing paper 33. And a slight gap is formed between the vibration control member 8 and the working surface of the abutting body 34.

  As a result, as indicated by W1 to W6, the printing paper 33 descends as indicated by a broken line while the leading end of the printing paper 33 contacts the action surfaces of the damping member 35 and the abutting body 34 several times, and follows the action surface. In this way, the printing paper 33 is aligned with the leading end of the printing paper 33 in contact with the abutting body 34.

  Moreover, there exists what is described in patent document 2. FIG. As shown in FIG. 13, the sheet 41 conveyed one by one by the conveyor is put into a stacking frame formed by a front stopper 42 provided in the front in the sheet conveying direction and a rear stopper 43 provided in the rear. is there. The front stopper 42 includes a stopper plate 44. The stopper plate 44 is disposed so as to be movable back and forth in the conveyance direction of the sheet 41, and is urged rearward in the sheet conveyance direction by a coil spring 45 so as to be buffered. The sheets 41 are aligned and stacked.

  Further, in the conventional stencil printing machine, when the rotation speed of the paper discharge belt is controlled in conjunction with the printing speed (the rotation speed of the printing drum), the speed of the paper sent to the paper receiving device when the printing speed is high is When the printing speed is low, the paper does not reach the stop member of the paper receiving device and the paper edges become uneven when the printing speed is low. The discharge speed of the paper discharged to the receiving device side is variably controlled to an optimum speed according to the printing speed.

  The optimum discharge speed is a speed at which the discharged paper after printing can be quickly discharged and an appropriate paper gap can be secured with the next printing paper without limiting the printing speed. In addition, the discharge speed is an appropriate speed that does not cause the ejected paper to be too strong against the stopper member and bounce, or too weak to reach the stopper member.

A technique for performing such control is disclosed in Patent Document 3. This is because when the printing speed is low, the linear speed ratio between the linear speed of the outer peripheral surface of the printing drum and the linear speed of the surface of the paper discharge belt is set to a large value. The linear speed ratio is set small, and the belt conveying speed of the paper discharge device is adjusted to an optimum speed according to the printing speed.
JP-A-8-259082 Japanese Unexamined Patent Publication No. Sho 63-171864 JP-A-8-67387

  However, in the technique described in the above-described conventional patent document 1, it is avoided that the abutting body 34 becomes an obstacle when the printing paper 33 is dropped due to the shaking of the abutting body 34, but the printing paper 33 is free. Since it falls, the printing paper 33 in contact with the shaking abutting body 34 does not necessarily fall directly below it, and may fall to the rear position or the front position. In order to ensure contact with the abutting body 34, it is necessary to dispose the abutting body 34 obliquely upward so that the lower side projects toward the printing paper 33, and the front side of the stacked printing paper 33 In some cases, the type of paper, particularly thick paper with a large amount of rebound, may not be fully absorbed and become uneven.

  In the technique described in Patent Document 2, the sheets 41 are aligned and stacked by the buffering action of the coil spring 45, but when the stopper plate 44 is retracted, the coil spring 45 is compressed and the stopper plate 44 is moved back by its elastic restoring force. Therefore, mechanical parts such as the coil spring 45 are required for the backward movement, and the coil spring 45 repeats compression and extension, so mechanical fatigue of the coil spring 45 becomes a problem.

  The present invention aligns the paper edges so that the laminated surface of the laminated paper is perpendicular to the paper surface, and can align the paper using gravity without using a mechanical member such as a coil spring, It is an object of the present invention to provide a paper discharge / paper receiving apparatus that can stabilize the action of aligning the paper edges by adjusting the discharge speed to an optimum constant speed regardless of the printing speed.

In order to solve the above-described problem, a paper discharge / paper receiving apparatus according to a first aspect of the present invention is a paper discharge unit that discharges paper from a machine body that performs predetermined processing on the paper, and a paper discharge unit that discharges the paper. The paper receiving means comprises a paper receiving means for stacking and holding the paper, and the paper receiving means is a paper stacking tray arranged in a horizontal direction, a stopper means for receiving the paper discharged on the paper discharging tray, and a rear of the paper. A regulating member that regulates the edge to a set position, and at least one of the stopper means and the regulating member is movably provided in the paper discharge direction, and the stopper means is movable so that the working surface that contacts the paper is arranged in the vertical direction. Body, a shaft for supporting the upper and lower positions on both sides of the movable body, and the movable body by engaging with the shaft, and a front stop position and a working surface where the working surface comes into contact with the paper discharged onto the paper discharge table. Back diagonally above the paper Has a movably held to the guide groove over the working position, the movable member by the guide shaft by the guide grooves, retracted back working position of the obliquely upward against gravity, backward and forward stop position by gravity The paper discharge means has a roller or belt that gives the paper discharge speed, and is necessary for proper operation of the movable body in the paper receiving means, regardless of the paper processing / conveying speed in the processing process in the machine body. The paper is discharged to the paper receiving means at a set discharge speed of a certain constant speed.

With the above-described configuration, the distance between the regulating member and the stopper means is adjusted according to the size of the sheets stacked on the paper discharge table.
The paper discharged on the paper discharge tray is set and discharged when the paper discharge means gives a set discharge speed by driving a roller or belt to paper that has paper processing and conveying speed in the processing process in the machine body. It flies at a speed and collides with the action surface of the movable body of the stopper means, and the kinetic energy is given to the movable body to fall from the collision position.

  The movable body, given the kinetic energy of the paper, moves back to the diagonally upward backward operating position against gravity, then moves back to the forward stop position by gravity and directs the paper that has fallen on the paper output tray to the regulating member. Then, press on the working surface and align and stack with the regulating member as a reference. When the sheet flies and collides with the set discharge speed, the movable body is given stable kinetic energy to move back to the backward operation position and performs a stable operation.

In the paper discharge / paper receiving apparatus according to the second aspect of the present invention, the discharge means changes the set discharge speed according to the type of paper.
With the above-described configuration, the kinetic energy required for the movable body to move backward to the backward operation position is constant. However, the kinetic energy given to the movable body when the paper flies at the set discharge speed and collides varies depending on the type of paper, that is, the thickness (thick paper, thin paper), size, and weight (material) of the paper. For this reason, by changing the set discharge speed of the discharge means according to the type of paper, it is possible to reliably give the kinetic energy necessary for the movable body to move backward to the backward operation position.

  As described above, according to the present invention, the movable body is driven using the kinetic energy of the paper discharged on the paper discharge tray, and the movable body is moved back using gravity to align the paper. The mechanical parts for the backward movement of the movable body become unnecessary, and there is no problem such as fatigue of the mechanical parts for the backward movement as in the prior art, and the sheets can be aligned with a simple configuration.

  Further, when the sheet flies at the set discharge speed and collides with the movable body, the movable body can be given a kinetic energy that is sufficient to move backward to the backward operation position and can perform a stable operation. Further, by changing the set discharge speed of the discharge means according to the type of paper, it is possible to reliably give the movable body the kinetic energy that is sufficient for the movable body to move backward to the backward operation position.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5, the paper receiving device 51 is applied to the printing device described above with reference to FIG. 11 and corresponds to the print tray 21.

  The paper receiving device 51 is disposed along the horizontal direction, and a paper discharge tray 52 for stacking paper 65 (see FIG. 5) discharged from the printing device or the like, a stopper means 53 standing on the paper discharge tray 52, A guide blade 54 that regulates in the width direction of the sheet 65 and a regulating member (not shown) that regulates the trailing edge of the sheet 65 to a set position are provided. The horizontal direction of the discharge table 52 is best, but it is maintained in the substantially horizontal direction even when the weight of the paper 65 is applied.

  The stopper means 53 receives the paper 65 discharged from the printing device or the like onto the paper discharge tray 52, and is provided so as to be slidable in the paper discharge direction, and is fixed at a set position by the lock device 55. Since the locking device 55 is a conventional technique, a detailed description thereof is omitted. Further, the stopper means 53 and the guide blade 54 are swingable between a storage position in which the stopper means 53 and the guide blade 54 are accommodated in the discharge table 52 and a standing position.

  Although the detailed description of the restricting member is omitted, it has a vertical restricting surface for aligning the sheets 65 and is usually fixedly arranged at a predetermined position, but can be slidable in the discharging direction of the sheet 65. It is.

  The stopper means 53 has a jogger plate 56 that forms a movable body and a stop guide 57 that holds the jogger plate 56. The jogger plate 56 is arranged with the working surface 58 that contacts the paper 65 in the vertical direction, and shafts 59 are provided at the upper and lower positions on both sides.

  The stop guide 57 forms a region for accommodating the jogger plate 56 between the support members 60 on both sides, and a guide groove 61 for engaging the shaft 59 of the jogger plate 56 is provided at a predetermined position of the support member 60. The shaft 59 is provided with a projection 62, and the support member 60 is provided with a locking portion 63 that engages with the projection 62. The shaft 59 is moved from the guide groove 61 by the engagement between the projection 62 and the locking portion 63. Prevent it from slipping out.

  In this structure, the stop guide 57 supports the shaft 59 in the guide groove 61, so that the jogger plate 56 and the operation surface 58 are brought into contact with the sheet 65 discharged on the discharge table 52. 58 is held so as to be movable over an obliquely upper rear operating position B that is separated from the sheet.

  The stop guide 57 is provided with an elastic body 64 such as a leaf spring that is separated from the jogger plate 56 at the front stop position and presses against the jogger plate 56 at the rear operation position. The elastic body 64 is not essential for the operation of the jogger plate 56 but is a means for assisting the operation.

  The guide groove 61 can be configured such that the inclination angle of the groove edge that guides the shaft 59 can be adjusted according to the type of the paper 65 or the like. For example, a guide member for guiding the shaft 59 is arranged along the groove edge of the guide groove 61, and the guide member is provided so as to be swingable so that the inclination angle can be adjusted, or a guide member separate from the stop guide 57. This can be realized by forming a guide groove 61 in the shaft and swinging the guide member so that the inclination angle can be adjusted. In this case, each guide member for guiding each shaft 59 is operated in conjunction with a link mechanism or the like. It is also possible to provide a sound absorbing member such as a sponge at the portion of the jogger plate 56 that collides with the paper 65 in order to mute the sound. In this case, the sound absorbing member is formed to be thin so that the jogger plate 56 does not hinder the absorption of the kinetic energy of the paper 65.

  7 to 10, the paper discharge mechanism 6 has a pair of paper discharge belts 72 spanned by a plurality of rollers 71, and a paper discharge belt that drives the paper discharge belt 72 at a position surrounded by the paper discharge belt 72. A motor 73 and a chamber 74 are arranged.

  The conveyor belt 72 has a plurality of suction holes 75 and slides on a top plate 76 provided with the suction holes 74 a of the chamber 74. The rotation speed of the paper discharge belt motor 73 can be changed by an instruction from a control device (not shown), and is driven between a drive pulley 77 of the paper discharge belt motor 73 and a driven pulley 78 provided on one roller 71. An encoder sensor 80 is disposed in the vicinity of the drive pulley 77 around the belt 79, and the discharge belt 72 rotates at a set discharge speed instructed from the control device by the rotation drive of the discharge belt motor 73. This set paper discharge speed is changed according to the type of paper 65.

  A fan unit 81 is provided in the chamber 74, and a suction force is applied to the paper 65 through the suction hole 74 a of the chamber 74 and the suction hole 75 of the paper discharge belt 72 by driving the fan unit 81. On the top plate 76 of the chamber 74, jump stands 82 are provided at positions on both sides of the paper discharge belt 72. A top blow fan 83 is disposed above the paper discharge mechanism unit 6.

  Hereinafter, the operation of the above-described configuration will be described. An operator selects a printing speed by key input on an operation panel (not shown) during printing. The printing speed is selected according to the print image, and can be set in five stages between 45 sheets / minute and 120 sheets / minute in this embodiment.

The stopper means 53 adjusts the position of the distance from the regulating member (not shown) according to the size of the paper 65 stacked on the paper discharge tray 52 and arranges it at the set position.
The paper 65 peeled off from the base paper 8 of the plate cylinder 2 is discharged to the paper receiving device 51 by the air supplied from the paper peeler claw 20 and the top blow fan 83. At this time, the paper discharge mechanism unit 6 conveys the paper 65 at a constant speed by the rotational driving of the paper discharge belt 72 while adsorbing the paper 65 to the paper discharge belt 72 with the suction force applied by the fan unit 81, so that the printing speed (printing) The sheet having the sheet processing / conveying speed in the process is controlled to the set discharge speed.

  As shown in FIG. 5A, the paper 65 discharged from the paper discharge mechanism unit 6 flies over the paper discharge tray 52 at a set discharge speed and collides with the working surface 58 of the jogger plate 56 of the stopper means 53. To do. Due to this collision, the sheet 65 gives its kinetic energy to the jogger plate 56 and falls from the collision position.

  At this time, the paper discharge mechanism 6 discharges the first paper 65 at a discharge speed slower than the set discharge speed. The paper receiving device 51 is surrounded on all sides by a stopper means 53, a guide blade 54, and a regulating member installed on the paper discharge tray 52. When receiving the first discharged paper, there is no flow of air, Resistance in the direction of landing. Therefore, depending on the paper discharge speed, the stopper means may be jumped over.

  Therefore, the first sheet 65 can be gently lowered by lowering the speed so that the first sheet 65 can be surely landed at a predetermined position on the sheet discharge tray 52. As the first sheet 65 descends, an air flow is generated between the stopper means 53, the guide blades 54, and the restricting member. Therefore, even if the second and subsequent sheets of paper 65 are discharged at the set discharge speed, the stopper means There is no problem of jumping over 53.

  Here, the “first sheet” is the first printed sheet after plate making, or the printed sheet after being left when the printing operation is temporarily stopped for some reason during the printing operation and there is a predetermined leaving time. Eyes. The standing time is measured by a timer or the like.

  As shown in FIG. 5B, the jogger plate 56 to which the kinetic energy is given by the paper 65 flying and colliding is guided by the shaft 59 in the guide groove 61 and resists gravity to the front stop position. It moves backward from A to the backward operating position B diagonally upward. At this time, the jogger plate 56 performs a stable operation by being given kinetic energy not excessively or deficiently when the sheet 65 flies and collides with the set discharge speed and moves backward to the backward operation position B. Further, in this process, the jogger plate 56 abuts on the elastic body 64 to elastically deform the elastic body 64 and presses against the elastic body in the rear operation position B.

  As shown in FIG. 5C, the jogger plate 56 that has spent the kinetic energy given from the paper 65 to move to the backward operation position B is moved back to the front stop position A along the guide groove 61 by gravity. To do. At this time, when the jogger plate 56 is moved back to the forward stop position A by gravity, the jogger plate 56 is smoothly started by receiving the elastic restoring force of the elastic body 64 at the initial movement, and is separated from the elastic body 64 in the backward movement process. The sheet 65 dropped on the table 52 is pressed against the regulating member by the action surface 58, and the sheets are aligned and stacked on the basis of the regulating member.

As shown in FIG. 6, the jogger plate 56 moved back to the front stop position A is stopped at the front stop position A due to the engagement between the protrusion 62 and the locking portion 63.
By the way, the above-mentioned jogger plate 56 has a constant kinetic energy required to move backward to its rearward operating position. On the other hand, the set discharge speed set in the paper receiving device 51 is basically set to a constant maximum speed of 120 sheets / min. In this state, the paper 65 flies at the set discharge speed and collides with the jogger. The kinetic energy applied to the plate 56 varies depending on the type of the paper 65, that is, the thickness (thick paper, thin paper), size, and weight (material) of the paper 65.

  For this reason, the set discharge speed is changed by performing key input on the operation panel according to the type of the paper 65, that is, the thickness (thick paper, thin paper), size, weight (material), and the like of the paper 65. At this time, the printing speed does not change. In this way, by changing the set discharge speed in accordance with the type of the paper 65, it is possible to reliably give the kinetic energy necessary for the jogger plate 56 to move backward to the backward operation position B.

The front view which shows the paper receiving apparatus in embodiment of this invention Exploded perspective view showing stopper means of the paper receiving device (A), (b), (c) is a front view, a side view, and a rear view showing a jogger plate of a paper receiving device. (A), (b), (c) is a front view, a side view, and a rear view showing a stop guide of the paper receiving device. (A), (b), (c) is an operation explanatory view showing the action of the stopper means of the paper receiving device. Enlarged view of the main part of the stopper means of the paper receiving device Side view showing the paper discharge mechanism Perspective view of the paper discharge mechanism Schematic diagram of paper discharge belt Schematic diagram of paper discharge mechanism Schematic diagram showing a conventional printing device Schematic diagram showing a conventional paper receiving device Schematic diagram showing another conventional paper receiving device

Explanation of symbols

51 Paper Receiving Device 52 Paper Discharge Stand 53 Stopper Means 54 Guide Blade 55 Locking Device 56 Jogger Plate 57 Stopping Guide 58 Working Surface 59 Shaft 60 Support Member 61 Guide Groove 62 Protruding Portion 63 Locking Portion 64 Elastic Body 65 Paper 71 Roller 72 Discharge Paper belt 73 Paper discharge belt motor 74 Chamber 74a Suction hole 75 Suction hole 76 Top plate 77 Drive pulley 78 Driven pulley 79 Drive belt 80 Encoder sensor 81 Fan unit 82 Jump stand 83 Top blow fan A Front stop position B Backward operation position

Claims (2)

A paper discharge unit that discharges the paper from the machine body that performs predetermined processing on the paper, and a paper receiving unit that stacks and holds the paper discharged from the paper discharge unit.
The paper receiving means includes a paper stacking tray disposed in the horizontal direction, stopper means for receiving the paper discharged on the paper discharging tray, and a restricting member for restricting the trailing edge of the paper to a set position. , At least one of the stopper means and the regulating member is provided to be movable in the paper discharge direction,
The stopper means includes a movable body arranged with the working surface in contact with the paper in a vertical direction, a shaft supporting the upper and lower positions on both sides of the movable body, and the movable body engaged with the shaft, and the working surface ejects the movable body. The movable body has a guide groove that is movably held between a front stop position that abuts on the paper ejected on the table and a rearward operating position that is obliquely above the working surface and is spaced from the paper , and is guided by the shaft by the guide groove. However, it moves back to the rear working position diagonally upward against gravity, and moves back to the front stop position due to gravity.
The paper discharge means has a roller or belt that gives the paper a discharge speed, and is necessary for proper operation of the movable body in the paper receiving means regardless of the paper processing / conveyance speed in the processing step in the machine body. A paper discharge / paper receiving apparatus that discharges paper to a paper receiving means at a set discharge speed of a constant speed.   2. The paper discharge / paper receiving apparatus according to claim 1, wherein the discharge means changes the set discharge speed in accordance with the type of paper.

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