JP3665135B2 - Sheet paper feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet feeding equipment. Feeding KamiSo location of the present invention, single long sheet paper machine equipment that needs to be fed one by one can be applied to any one, for example, a printed matter inspection apparatus, suitable feed in a printing press The present invention relates to a paper device .
[0002]
In this specification, the “sheet” is a concept for a rolled paper, and refers to a paper or a film cut into a predetermined size and shape. The thickness is not particularly limited, and includes a thin paper and a thick paper. In the case of paper, thick paper includes cardboard and corrugated paper, and folded paperboard, bag paper, corrugated paper and the like that are box-shaped when assembled three-dimensionally are also included in the sheet.
[0003]
[Prior art]
2. Description of the Related Art Conventionally, a suction cup type has been used as a sheet feeding device for sheets. This prior art will be described with reference to FIG. 13. Reference numeral 101 denotes a rubber sucker, which is connected to a negative pressure source such as a blower or a vacuum pump. Is moved up and down and back and forth. The most general movement is a cycle of lowering the suction cup 101 → (paper adsorption) → up → forward → (paper detachment) → retreat → down.
[0004]
[Problems to be solved by the invention]
However, in the conventional paper feeder, if the suction operation by the suction cup and the transport operation by the suction cup are performed at the same time, the suction becomes incomplete, so the transfer operation can not be started until the suction operation is completed. There is a problem that a dead time is inevitably generated, and there is no continuity between the sucking up / down movement and the forward / backward movement, and the speed may become zero at the beginning and end of each movement. There was a big problem that I couldn't. Further, since the operation is intermittent, the paper is easily misaligned or detached during the paper feeding operation, and the paper feeding operation is incomplete.
[0005]
The present invention has been made in view of such circumstances, but may be faster, and to provide a feeding equipment for definitive sheet that reliable in feeding operation.
[0006]
[Means for Solving the Problems]
The sheet feeding device according to claim 1 is a sheet feeding device for feeding sheets one by one from the uppermost surface of the sheet stack, and includes a shaft body and a feed drum that rotates on an outer periphery of the shaft body. A drum unit , an arm that swings the drum unit up and down, and a driving roller that rotates the feed drum, and the shaft body has a duct connected to a negative pressure source formed therein, and A suction port is opened at a portion facing the sheet laminate, the suction drum has a plurality of suction holes formed on the drum surface, and the arm has the drum unit attached to the tip thereof. The arm swings and the feed drum comes into contact with or separates from the uppermost surface of the sheet stack, and the drive roller swings the arm upward to bring the feed drum to the paper feed position. When it reaches the feed drum Provided at a position in contact, the feed drum by the drive roller is characterized in that it is rotated.
請 Motomeko sheet paper feed apparatus 2 is the invention of claim 1, wherein said feed outer band made of high adhesion material on the contact portion between the sheet of the drum surface of the drum is provided It is characterized by that.
According to a third aspect of the present invention, there is provided the sheet feeding device according to the first aspect , wherein a bracket to which the drum unit is attached is pivotally supported at the tip of the arm, and the bracket is held in the same axial direction with respect to the arm. And a resilient member is provided that allows the drum unit to be bent into a dogleg shape when the drum unit is pressed against the upper surface of the sheet laminate .
[ 0007 ]
[ 0008]
DETAILED DESCRIPTION OF THE INVENTION
It will now be described on the basis of the KyushiSo location according to an embodiment of the present invention with reference to the drawings.
This onset Ming may be applied to various mechanical devices required for paper feeding, but the following describes an example of application to a printed matter inspection device.
[0009]
FIG. 10 is a side view of a printed matter inspection apparatus to which the paper feeding device of the present invention is applied. In the figure, reference numeral 1 on the left side is a stocker on the sheet feeding side, in which sheets printed on the base plate 1a are stacked (a stack of sheets is indicated by a symbol P, and each sheet is one sheet). The base plate 1a rises as the sheets p are taken out from the upper surface one by one (several thin sheets p). Reference numeral 2 on the right side of the drawing is a stocker on the paper discharge side, in which inspected sheets p are stored one by one on the base plate 2a, and the base plate 2a is changed according to the number of stacked sheets p. It comes to descend.
[0010]
An inspection conveyor 3, a carry-out conveyor 4, a sorting conveyor 5, and a paper discharge roller unit 6 are provided in this order between the paper feed-side stocker 1 and the paper discharge-side stocker 2.
The inspection conveyor 3 includes a feed belt wound around the drive roll 3a and a driven roll 3b and its these is constituted by a station roll 3d, the upper surface of the conveyor 3 printing state of the inspected paper p A printing defect inspection device Z for inspecting the above is installed. The print defect inspection device Z is a known inspection device that determines the suitability of printing by optical processing using a pattern recognition method or the like.
The carry-out conveyor 4 is a conveyor having a known structure in which a feed belt is wound around the shaft 4a and the shaft 4b.
[0011]
The sorting conveyor 5 has an arm 5d attached to the shaft 4b of the carry-out conveyor 4, a shaft 5a attached to the tip thereof, and a feeding belt stretched between the shaft 4b and the shaft 5a. Is engaged with the cam 5b, and the rotation of the cam 5b causes the outlet side to swing up and down.
The paper discharge roller unit 6 includes a lower feed roller 6A for discharging normal inspection paper p, and an upper feed roller 6B for discharging defective inspection paper p. . When the inspection paper p is normal, the sorting conveyor 5 is kept in a horizontal state and is fed to the stocker 2 by the lower feed roller 6A. If the paper to be inspected p is not normal, the sorting conveyor 5 is raised and sent to the discharge conveyor 7 provided on the stocker 2 by the upper feed roller 6B, and is discharged from there to the defective paper stocker 9.
[0012]
An entrance-side biting roller 8 is provided on the upper surface of the entrance-side driven roll 3b of the inspection conveyor 3, and the biting roller 8 is composed of a plurality of rollers arranged in the axial direction. . In the upper part of the paper feeding side stocker 1, the paper feeding device 10 of the present invention for feeding the stacked sheets p one by one to the biting roller unit 8 (reference numeral 10 denotes each of the present invention). It is used as a representative of all the embodiments 10A, 10 B) are provided.
[0013]
Next, the feeding equipment of the first embodiment.
[0014]
1 to 3, reference numeral 20 denotes a drum unit, which includes a shaft body 11 and a feed drum 21. The shaft body 11 is formed in a cylindrical shape, and a duct 12 is formed inside the shaft body 11, and a pipe or the like is connected to the connection hole 13 to connect to a negative pressure source such as a blower or a vacuum pump. Yes. Further, a suction port 14 is opened in a direction facing the upper surface of the sheet laminate P of the shaft body 11 in a direction facing the sheet laminate P. The shape of the suction port 14 is equal in width in the example in the figure, but an optimal shape such as a tapered shape or a diverging shape may be selected in order to obtain a necessary suction negative pressure. Moreover, what is necessary is just to select the optimal shape similarly in the shape seen with the top view.
[0015]
The shaft body 11 is attached to the bracket 15, and the bracket 15 and the side surface of the shaft body 11 are hermetically sealed with an O-ring or other sealing means, and the bracket 15 is also connected to a negative pressure source. A connection hole 16 is formed.
[0016]
A feed drum 21 is rotatably inserted on the outer periphery of the shaft body 11. The feed drum 21 includes a drum body 24 including a drum surface 22 and a side wall 23, and a shaft 25 attached to the side wall 23. A number of suction holes 26 are formed in the drum surface 22. As the shape of the suction hole 26, an optimum shape may be selected in order to obtain a necessary negative pressure. For example, a long hole shape or a round shape may be considered. The outer periphery of the drum surface 22 is covered with a material having high adhesion to paper, for example, a silicone resin or rubber outer band 27. A number of suction holes 26 are also formed in the exterior band 27 at the same position as the drum surface 22 .
[0017]
Adsorption in the drum unit 20 of the present embodiment, when the action of negative pressure to the duct 12 of the shaft 11, since the suction holes 26 of the feed drum 21 which faces the suction port 14 becomes a negative pressure, the sheet p When the feed drum 21 is rotated, the sheet p can be fed in the rotation direction while being sucked and held. Of course, as the feed drum 21 rotates, the suction holes 26 facing the suction port 14 change one after another. However, since the suction action can be performed without change, paper feed can be performed by the rotation of the feed drum 21.
[0018 ]
[ 0019]
Figure 4 is a fragmentary cross-sectional side view of an arm support structure, Figure 5 is Dotaira view, FIG. 6 is an Dodo operation explanatory diagram.
The drum unit 20 is attached to the tip of the arm 31. 28 is a suction pipe for connection to a negative pressure source.
[0020]
The arm 31 swings up and down. As a means for swinging, any means such as a swinging method using a cam or a link, a method of reciprocatingly rotating the support shaft 32 of the arm 31 in the forward and reverse directions, etc. Can be adopted.
[0021 ]
[ 0022]
FIG. 7 is a side view of the sheet feeder 10A . As shown in the figure, the drive roller 33 is supported by the drive shaft 34 at a position in contact with the outer periphery of the feed drum 21 (or the outer periphery of the outer belt 27) at the rising position of the drum unit 20, that is, the paper feed position. A rotational drive source is connected to the drive shaft 34 and is always rotated. The drive roller 33 is preferably a rubber roller having rubber wrapped around the outer periphery in order to easily transmit the rotational driving force.
[0023]
In this embodiment, drum unit 20 is raised, it rotated in contact with the drive roller 33 when it reaches the paper feed position, so as feed the sheet p lifted adsorbed forward.
In this embodiment, since it is not necessary to attach the motor 29 to the tip of the arm 31, the mass is reduced and the swinging motion of the arm 31 is accelerated, which is advantageous for high-speed operation.
A paper feeding operation of the paper feeding device 10A will be described with reference to FIG. The driving roller 33 is not shown. From a state where the drum unit 20 in FIG. (A) is separated from the sheet stack P, and the arm 31 is swung into contact with the drum unit 20 on the upper surface of the sheet stack P as shown in FIG. (B) When, the top sheet p is adsorbed, then adsorbed sheet p is lifted as shown in FIG. and raising the arm 31 (c), the drum 21 sends after rising of arm 31 When rotated, the sheet p is fed forward. When the fed sheet p is bitten by the biting roller 8, the above operation is repeated, whereby the sheet p can be sequentially sucked and fed one by one.
[0024]
FIG. 8 is a plan view of the paper feeding device 10 B according to the second embodiment, and FIG. 9 is an operation explanatory diagram of the paper feeding device 10 B.
A bracket 35 is pivotally supported on the shaft 25 of the drum unit 20, and the clevis of the bracket 35 and the clevis at the tip of the arm 31 are fitted together and are rotatably coupled by a pin 36. A plate spring 37 is attached to the top surface of the tip of the arm 31, and the free end side of the plate spring 37 is applied to the top surface of the bracket 35. A reference numeral 38 shown in FIG. 9A is a holding plate that supports the bracket 35 so as not to be lowered downward from a position coaxial with the arm 31.
[0025]
In this embodiment, as shown in FIG. 9B, when the arm 31 is swung downward and the drum unit 20 is pressed against the sheet laminate P, the leaf spring 37 is bent and the arm 31 and the bracket 35 Since it bends in a square shape and releases excess force, adjustment of the lower limit of arm 31 or adjustment of the rising position of the stocker base plate can be done roughly, and without damaging the surface of the sheet p, There is an advantage that adsorption can be surely performed.
[0026 ]
[ 0027 ]
[ 0028 ]
[ 0029 ]
[ 0030 ]
[ 0031 ]
[ 0032]
【The invention's effect】
According to the first aspect of the present invention, the sheet is adsorbed by the negative pressure acting on the shaft body and the suction hole of the feed drum, and the paper is fed by the rotation of the feed drum. The paper feed operation is called rotation of the feed drum. Since it is caused by continuous operation, energy loss is reduced . Although it is possible to paper feeding in three-dimensional space that combines vertical movement by swinging arms to the horizontal feed by feeding drum, because the horizontal feed and the upper feed can be performed simultaneously continuously, operation and quickly It is smooth and there is no stop of increase / decrease in the moving speed, so that the sheet does not fall or shift in the middle of paper feeding. Furthermore, since it is not necessary to attach the rotational drive source of the feed drum to the arm, the weight can be reduced and the speed can be increased.
According to the second aspect of the present invention, since the outer band having high adhesion on the surface of the feed drum comes into contact with the sheets, the sheets can be reliably taken out one by one from the laminate.
According to the invention of claim 3 , when the arm is swung downward and the drum unit is pressed against the sheet laminate, the leaf spring is bent and the excess force is released. There is an advantage that the rising position of the stocker base plate can be adjusted roughly, and the suction can be reliably performed without scratching the surface of the sheet .
[ 0033 ]
[ Brief description of the drawings]
FIG. 1 is a longitudinal side view of a drum unit 20 according to a first embodiment of the present invention.
2 is a vertical sectional front view of the drum unit 20 according to the embodiment.
3 is an exploded perspective view of the drum unit 20 according to the embodiment.
FIG. 4 is a cross-sectional side view of a main part of an arm support structure .
FIG. 5 is a plan view of the arm support structure .
6 is an explanatory view of the operation of the drum unit 20 according to the embodiment.
7 is a side view of a sheet feeding apparatus 10A according to the embodiment.
FIG. 8 is a plan view of a sheet feeding device 10B according to a second embodiment of the present invention .
FIG. 9 is an operation explanatory diagram of a sheet feeding device 10 B according to the second embodiment of the present invention.
FIG. 10 is a side view of a printed matter inspection apparatus to which the paper feeding device of the present invention is applied.
FIG. 11 is a plan view of a transport apparatus to which the present invention is applied .
Figure 1 2 is an explanatory view of a conventional sheet feeding apparatus.
[Explanation of symbols]
10 Paper feeder
11 Shaft
12 Duct
14 Suction port
21 Feed drum
26 Suction hole
27 Exterior strip
31 arm
33 Drive roller
37 leaf spring
41 shaft
42 Duct
44 Suction port
51 Feed drum
56 Suction hole

Claims (3)

A sheet feeding device that feeds sheets one by one from the uppermost surface of a sheet stack, a drum unit including a shaft body and a feed drum that rotates on the outer periphery of the shaft body, and swings the drum unit up and down. An arm to be moved, and a driving roller for rotating the feed drum ,
In the shaft body, a duct connected to a negative pressure source is formed inside, and a suction port is opened at a portion facing the sheet laminate,
The feeding drum has a number of suction holes formed on the drum surface ,
The arm has the drum unit attached to the tip thereof, and the feeding drum comes into contact with or separates from the uppermost surface of the sheet laminate by the swinging motion of the arm,
The drive roller is provided at a position where it comes into contact with the feed drum when the arm swings upward and the feed drum reaches the paper feed position, and the feed drum is rotated by the drive roller. A sheet feeding device characterized by . The feeding drum according to claim 1 Symbol placement of the sheet paper feeder, characterized in that the outer band made of high adhesion material on the contact portion is provided between the sheet of the drum surface. A bracket to which the drum unit is mounted is pivotally supported at the tip of the arm, the bracket is urged to be held in the same axial direction with respect to the arm, and the drum unit is pressed against the upper surface of the sheet laminate. when, dogleg to break flex sheet paper feed apparatus according to claim 1, wherein a resilient member is provided that allows.

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