JP2011116502A - Paper feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a paper feeder without need of removal or reload of a paper bundle on a paper feed plate for replacing a separating plate. <P>SOLUTION: A first separating member is made movable between a position abutting to a paper feed roller 3 and a position apart from the roller at a position facing the paper feed roller 3, and a second separating member is made slidable between the position facing the paper feed roller 3 and a retreat position apart from the position in a paper feed roller axial direction. When the first separating member is used, the second separating member is retreated to move the first separating member to the abutting position from the apart position. When the second separating member is used, the first separating member is lowered to the apart position to slide and move the second separating member from the retreated position to overlap it on the first separating member, and the first separating member is moved in a direction to abut to the paper feed roller 3 under this condition, thus letting the second separating member abut to the paper feed roller 3. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention belongs to a technical field of a paper feeding device that feeds a top sheet from a sheet bundle stacked on a paper feeding plate by a paper feeding roller and a separating member.

2. Description of the Related Art A sheet feeding device that separates a plurality of stacked sheets one by one by pressing a paper plate on the outer peripheral surface of a sheet feeding roller and passing the sheet therebetween is widely used.
In this paper feeding device, the frictional force between the paper and the outer peripheral surface of the paper feeding roller and the frictional force between the paper and the surface of the paper plate exceed the frictional force between the papers. The plate is prevented from moving forward, and only the upper sheet is moved forward by the sheet feeding roller. However, since the frictional force between the papers varies depending on the paper quality, it is necessary to adjust the pressure contact force (sealing pressure) between the outer peripheral surface of the paper feed roller and the paper plate according to the paper quality.

However, since it is not enough to adjust the pressure contact force to cover a wide range of paper quality from releasable paper to coated paper, it is possible to replace the cypress plate and replace several cypress plates with different crisp surfaces. May be used.
As such a technique, a cover plate having a coefficient of friction different from that of the plate is attached to the tip of the holding plate extending from the rear side of the paper feed roller on the plate, and the upper surface of the plate is covered with the plate. It is performed that the crustacean plate covering tool that can be used as a crust plate is replaced with the holder according to the paper quality (for example, see Patent Document 1).

JP 2009-143673 A (paragraphs [0014], [0017], FIG. 1, FIG. 2, FIG. 5)

However, in the above-described prior art, in order to attach or replace the buckle plate covering tool, it is necessary to once remove the sheet bundle loaded on the sheet feeding table.
In addition, it is necessary to actually load a bundle of sheets and operate the sheet feeding device to check whether the attached plate cover is suitable for the quality of the sheet to be fed. Therefore, it may be possible to replace the crust plate covering device that is optimal for the paper quality twice or three times. However, each time a sheet bundle is removed from the sheet feeding plate or loaded. There is a problem that it takes time and effort to repeat.

  The problem to be solved by the present invention resides in this point, and is to realize a paper feeding device that can replace the sucker plate without removing and stacking the sheet bundle on the paper feeding plate one by one.

  According to the first configuration of the present invention, a sheet feeding plate on which a sheet bundle is stacked, a sheet feeding roller that feeds and rotates the uppermost sheet by pressing against the uppermost surface of the sheet bundle, and the sheet feeding roller can be pressed. In the sheet feeding device having a first surface member including a surface for separating two or more sheets fed one by one, an action that overlaps the first surface member separated from the sheet feeding roller It is possible to slide between the position and the retracted position that does not overlap the first sucking member in the same direction as the paper feed roller shaft. In the working position, the first sucking member covers the first surface. A sheet feeding device having a second sheet member that separates sheets by pressing against sheet feeding rollers instead of the sheet member.

  According to a second configuration of the present invention, in the first configuration, the surface of the first surface member is moved from the contact position in contact with the surface of the paper feed roller to at least the surface of the second material from the outer surface of the paper feed roller. It has a claw movement means for moving it to a separation position with an interval equal to or greater than the thickness dimension, and the second crust member is separated without changing its position in the thickness direction when moving from the retracted position to the working position. A sheet feeding device comprising a slide base that slidably supports a second sheet plate so as to enter between the first sheet member located at a position and the outer peripheral surface of the sheet feeding roller.

  According to a third configuration of the present invention, in the second configuration, the suction movement unit rotates the first suction member in the contact position by rotating about a rotation shaft in the same direction as the paper feed roller shaft. And the separation position, and the inclination of the feeding surface of the second surface member is higher than the inclination of the feeding surface of the first surface member. Device.

  According to a fourth configuration of the present invention, in any one of the first to third configurations, the first rust member is configured to guide the second rust member to move in the sliding direction, and The sheet feeding device includes a guide portion that defines a relative positional relationship between the surface of the first member and the surface of the second member when overlapped above the one member.

  According to a fifth configuration of the present invention, in any one of the first to fourth configurations, the surface of either the second surface member or the first surface member contacts the outer peripheral surface of the paper feed roller. The sheet feeding device includes a restricting unit that restricts the second sucker member from being slidable when in the position.

  In the first configuration of the present invention, the first sucking member can take two positions, the state in contact with the paper feed roller and the separated state, while the second sucking member has the first separating member in the separated state. In addition, the retracting position and the paper feed roller are opposed to each other, that is, the operating position can be slid in the same direction as the paper feed roller shaft, so that the sheet feeding operation is performed in a state where the sheet bundle is stacked on the paper feed table. There is an effect that the plate can be replaced.

  According to the second configuration of the present invention, in the first configuration, the first sucking member is moved between a position where the first sucking member is brought into contact with the sheet feeding roller and a separation position where the second sucking plate can enter between the sheet feeding roller. Since the surface moving means and the second surface plate do not move up and down and have a slide base that slidably supports between the operating position and the retracted position, the operation of the first configuration can be performed smoothly. effective.

  In the third configuration of the present invention, the first movement member is brought into contact with the outer peripheral surface of the paper feed roller by the rotation of the second movement mechanism in the second configuration about the rotation shaft in the same direction as the paper feed roller shaft. Or return to the separation position, it is possible to apply a uniform and stable contact pressure in the axial direction, and the inclination of the feeding surface of the second surface member in the feeding direction is more than that of the first surface member. By facing upward, there is an effect that the contact angle when the surface of the second surface member comes into contact with the outer peripheral surface of the paper feed roller can be made closer to the contact angle when the first surface member contacts.

  According to the fourth configuration of the present invention, in any of the first, second, and third configurations, when the second rust member is slid onto the first rust member, Since there is a guide portion that guides the sliding movement of the two rust member, the angular relationship between the rust surface of the first rust member and the rust surface of the second rust member is uniquely determined.

  In the fifth configuration of the present invention, in any of the first to fourth configurations, when the surface of either the first or second surface is in contact with the outer peripheral surface of the paper feed roller, Since the restricting means is provided to prevent the sliding of the two sucking members, the second sucking plate is slid while being pressed against the feeding roller to deform the feeding roller, or the first sucking plate and the feeding roller. There is an effect that it is possible to prevent the occurrence of a failure by trying to push in the second rust member even though the gap is not open.

It is a perspective view of this invention paper feeder. FIG. 2 is a top view of FIG. 1. FIG. 3 is a top view with the guide plate of FIG. 2 removed, showing a state in which the second plate is in a retracted position. FIG. 4 is a top view of a state in which the slide frame has moved to the right from the state of FIG. 3 and the second plate has overlapped with the first plate. FIG. 4 is a cross-sectional view taken along the line B-B in FIG. 3, illustrating a state where the first plate is not in contact with the paper feed roller. FIG. 6 is a state diagram in which the first pressure plate is pushed up by pulling the dust pressure adjustment link to the right from the state of FIG. 5, and the first dust plate is in contact with the paper feed roller. FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 4, illustrating a state where the second plate is not in contact with the paper feed roller. FIG. 8 is a diagram illustrating a state in which the suction pressure adjustment link is pulled to the left from the state of FIG. 7 to push up the first and second suction plates, and the second suction plate is in contact with the paper feed roller. It is AA sectional drawing of FIG. The second plate is in the retracted position. FIG. 10 is a diagram illustrating a state in which the first plate is in contact with the sheet feeding roller when the inclined plate is pulled toward the paper surface from the state of FIG. 9 and the inclined portion pushes up the sphere. It is AA sectional drawing of FIG. This is a state where the second plate is overlapped with the upper side of the first plate. In the state shown in FIG. 11, the inclined plate is pulled toward the side of the paper, and the inclined portion pushes up the sphere, so that the second plate is in contact with the paper feed roller. FIG. 4 is a member arrangement view of the suction pressure adjusting mechanism as viewed from the front side of the sheet feeding device.

  In the present invention, two types of baked members having different friction coefficients are prepared in a paper feeding device, and either one is selectively brought into contact with a paper feeding roller according to the quality of the paper to be fed. The first sucking member is provided so as to be able to move in contact with or away from the sheet feeding roller at a position facing the outer peripheral surface of the sheet feeding roller, and the second sucking member is opposed to the outer peripheral surface of the sheet feeding roller. When the first rust member is used, the second rust member is evacuated to the evacuation position so that it can slide between the position and the evacuation position set in the same direction as the axial direction of the paper feed roller. When the second surface member is used, the first surface member is placed at a position away from the paper supply roller, and the second surface member is moved away from the paper supply roller. Feeding the material from the retracted position Slide it to the position facing the outer peripheral surface of the roller, where it is placed on top of the first rust member, and pushes up the first rust member to push up the second rust member to contact the outer surface of the paper feed roller. It is a structure of letting.

  As a concrete implementation of the above structure, there is provided a sliding movement means for contacting and separating the first sucking member from the paper feed roller, a slide base for sliding the second sucking member, and the second sucking member. When the angle of the member's surface is in contact with the outer peripheral surface of the paper feed roller, the relative positional relationship between the two is always inclined so that the angle is close to that of the first surface member or the second surface member is overlapped with the first surface member. A guide is provided to be the same, and in order to prevent other damages and breakdowns, a structure is adopted in which when either the first or second roller member is in contact with the paper feed roller, the second roller member cannot be slid. ing.

Hereinafter, embodiments of the paper feeding device of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an embodiment of the paper feeding device of the present invention.
A sheet bundle is stacked on the sheet feeding plate 5, and is fed one sheet at a time in the sheet feeding direction from the uppermost sheet of the sheet bundle by the sheet feeding roller 3 and the surface plate that is in contact with the outer peripheral surface thereof from below.
The present invention relates to a structure for exchanging the plate according to the paper quality.

FIG. 2 is a top view of FIG. 1 viewed from above.
The first sucker plate 6 is in a position facing the outer peripheral surface of the paper feed roller 3, and the second sucker plate 7 is in the retracted position on the left side of the first sucker plate 6.

FIG. 3 is a top view in which the guide plate 2 in FIG. 2 is removed.
The first plate 6 is in a position facing the outer peripheral surface of the paper feed roller 3 (not shown in FIG. 3) in a state of being affixed to the first affixing base 10. The first sticking table 10 can be rotated by the sticking table rotating shaft 11 so that the surface of the first plate 6 can be brought into contact with or separated from the outer peripheral surface of the paper feed roller 3. It has become. In FIG. 3, the first plate 6 is in a state of being lowered to the side facing the page.
The second plate 7 is in the retracted position on the left side of the first plate 6 in a state where it is attached to the second attachment table 17 and fitted into the slide frame 9.

  Now, when the switching lever 14 is turned to the left as shown in FIG. 4, the slide frame 9 slides to the right on the slide base 16, so the second plate 7 also moves to the right and moves down. It comes to the position which overlaps on the 1st buckle board 6 which exists.

5 is a cross-sectional view taken along the line BB in FIG.
As described in the explanation of FIG. 3, the first plate 6 is stuck on the first sticking table 10 (the one integrated with both is called the first plate member) and is fed in that state. It goes down to leave the roller 3.
In the state where the second plate 7 is affixed to the second attachment table 17 (referred to as the second plate member), the second plate 7 is fitted to the slide frame 9 on the right side (in FIG. 3). Retracted to the retreat position on the left side.
When the first pressure member 8 is moved to the left, the upper portion of the inclined plate 18 is under the ball 19, so the first sticking base is pushed up, and the right pressure member 8 is moved to the right. When returned to the direction, as shown in FIG. 5, the ball 19 is placed at the lowest position of the inclined plate 18, and the first sticking table 10 is at the lowest position.

In FIG. 6, when the suction pressure adjusting link 8 is pulled to the left, a high portion of the inclined plate 18 enters under the ball 19, and the first suction member is pushed up so that the suction surface of the first suction plate 6 The state in contact with the outer peripheral surface of the paper feed roller 3 is shown.
In this state, the pressure at which the surface is in contact with the outer peripheral surface of the paper feed roller 3 can be adjusted by moving the surface pressure adjustment link to the left and right.
Moreover, in the state of FIG. 6, although the left side part of the slide frame 9 is a state which contact | abuts to the right side surface of the 1st sticking stand 10, the 1st sticking stand 10 is shown in FIG. 3, FIG. Since the structure cannot move in the left-right direction, even if the slide frame 9 is moved to the left by the switching lever 14, it cannot be moved. That is, the right side surface of the first sticking table 10 and the left side frame portion of the slide frame 9 prevent the slide frame 9 from moving when the first sucking member is in contact with the outer peripheral surface of the paper feed roller 3. It functions as a regulatory tool.
In the above structure, the first sticking table 10 itself functions as a restricting means, but a restricting means separate from the first sticking table 10 may be provided.

FIG. 4 is a plan view when the switching lever 14 is pushed to the left as described above to place the second plate 7 on the first plate 6. FIG. 7 shows the state in the BB cross section. This is because the slide frame 9 containing the second sack member (the one having the second sack plate 7 attached to the second attachment base 17) is moved over the slide base 16 from the state of FIG. This is a cross-sectional view taken along the line B-B in a state of sliding to the left.
This sliding movement stops when the inner surface of the right frame of the slide frame 9 comes into contact with the right surface of the first sticking table 10.
In this state, the second plate 7 is not yet in contact with the paper feed roller 3.

In FIG. 8, the suction pressure adjusting link 8 is pulled to the left from the state shown in FIG. 7, and the first sticking table 10 is pushed up, whereby the second suction member is also pushed up, and the second suction plate 7 is moved to the paper feed roller 3. It is BB sectional drawing of the state which contact | connected.
In this state, since the first sticking base 10 is inserted into the frame of the slide frame 9, the slide frame 9 cannot be slid and eventually, when the second plate 7 is in contact with the paper feed roller. It functions as a restricting means that prevents the slide frame from moving.
In the above structure, the first sticking table 10 itself functions as a restricting means, but a restricting means separate from the first sticking table 10 may be provided.

9 is a cross-sectional view taken along the line AA in FIG. In other words, the second plate 7 is in the retracted position, and the first plate member is inclined from the position where the plate pressure adjustment link 8 in FIG. 3 from which the guide plate 2 in FIG. Since it is on the lowest part of the plate 18, it is an AA sectional view in the lowest state.
The first affixing table 10 to which the first buckle plate is affixed is capable of rotating around the affixing table rotation axis 11, and the height of the inclined plate 18 under the holding ball 19 is high. However, since it changes by moving the Sakiki pressure adjustment link 8 (refer FIG. 5, FIG. 6) right and left, it will move up and down by rotation. Eventually, this turning structure and the suction pressure adjusting mechanism are the means for moving the suction member up and down.
However, the scallop moving means is not limited to such a structure, and for example, may be a structure that moves up and down by the rotation of a screw, or may be a different structure by a known technique.
The first sticking table 10 is provided with guide parts 20a and 20b for guiding the second sticking table when the second sticking table 17 to which the second buckle plate 7 is stuck slides. .

  In FIG. 10, the inclined plate 18 in FIG. 9 is pulled toward the side facing the paper surface, and the lower part of the ball 19 is raised, the first sucker member rises, and the first sucker plate 6 contacts the paper feed roller 3. It is AA sectional drawing of a state.

FIG. 11 is a cross-sectional view taken along line AA in FIG. 2 in a state where the second plate 7 is overlapped on the first plate 6 in the lowered position by the movement of the slide frame 9 as shown in FIG. It is sectional drawing.
According to this figure, on the 1st paddle member in which the 1st paddle board 6 was stuck on the 1st sticking stand 10, the 2nd paddle member in which the 2nd paddle board 7 was stuck on the 2nd sticking stand 17 overlaps. In position.
As for the 2nd sticking stand 17, the front-end part and rear-end part of a paper feeding direction are bent, the front-end part is fitting in the guide part 20a of the 1st sticking stand 10, and the rear-end part is fitting in the guide part 20b. . This is because the front end portion and the rear end portion of the second sticking table 17 are the guides of the first sticking table 10 when the slide frame 9 slides to the right from the state where the second sucker member is in the retracted position (FIG. 3). Inserted from the side into the portion 20a and the guide portion 20b, is guided by the guide portions 20a and 20b, proceeds to the position shown in FIG. 7, and reaches a position facing the outer peripheral surface of the paper feed roller 3.

  The front end of the second sticking table 17 is higher so that the inclination of the second feeding plate 7 in the sheet feeding direction is slightly upward relative to the inclination of the first feeding plate 6 in the feeding direction. This is because the inclination when the second buckle plate 7 is in contact with the paper feed roller 3 (see FIG. 12) is close to the slope when it is in contact with the paper feed roller of the first buckle plate 6 (see FIG. 10). It is to make it. Ideally, the same slope is desirable.

FIG. 12 shows that, from the state of FIG. 11, the second pressure plate 7 is moved to the left and the first sticking base 10 is pushed up (see FIG. 8), so that the second surface plate 7 is moved to the outer peripheral surface of the paper feed roller 3. FIG. 3 is a cross-sectional view taken along a line AA in FIG.
From the above description, FIG. 7 and FIG. 11 correspond, and FIG. 8 and FIG. 12 correspond.

FIG. 13 shows that the first and second buckling plates 6 and 7 are moved to the feeding roller 3 by moving the first sticking table 10 in FIGS. It is explanatory drawing of the Sabaki pressure adjustment mechanism for adjusting the contact pressure when making it contact or separate from an outer peripheral surface, and contacting, and the arrangement of each member is the arrangement when viewed from the front of the paper feeder It has become.
When the Sabaki pressure adjustment knob 1 is turned, an adjustment gear 26 coaxial with the axis of the knob rotates, and this rotation is transmitted to a crank gear 27 meshing with teeth, and the crank arm 22 integrated with this gear also rotates. .

  The crank arm 22 is connected to a connecting rod 24 by a crank pin 23, and the circular arc motion of the crank arm 22 is converted into a reciprocating motion, and this reciprocating motion is connected to the Sabaki pressure adjusting link 8 (FIG. 3) via the connecting pin 25. To FIG. 8). The suction pressure adjusting link 8 is connected to the inclined plate 18 at the tip (right end in each figure), and eventually the inclined plate 18 moves to the left and right. On the inclined plate 18, a sphere 19 held on the first sticking table 10 is placed. Therefore, when the inclined plate 18 is moved to the rightmost and the ball 19 is at the lowest position of the inclined plate, the ball 19 is also lowered and the first attaching table 10 is also at the lowest height.

  On the other hand, when the inclined plate 18 is pulled to the left by the Sabaki pressure adjusting link 8, the height of the inclined plate below the sphere 19 increases, so that the sphere 19 is also lifted. Accordingly, the first sticking table 10 is also pushed up, the first buckling plate 6 or the second sucking plate 7 is also pushed up to come into contact with the outer peripheral surface of the paper feed roller 3, and the contact pressure increases when going up further. Therefore, by turning the buckling pressure adjustment knob 1, the lifting plate can be raised and lowered and the suction pressure adjustment can be performed.

DESCRIPTION OF SYMBOLS 1 Sakiaki pressure adjustment knob 2 Guide plate 3 Paper feed roller 4 Paper feed roller shaft 5 Paper feed plate 6 1st Sakiki plate 7 2nd Sakiki plate 8 Sabaki pressure adjustment link 9 Slide frame 10 1st sticking stand 11 Sticking stand rotating shaft 12 First sensor 13 Second sensor 14 Switching lever
DESCRIPTION OF SYMBOLS 15 Lever fulcrum 16 Slide stand 17 2nd sticking stand 18 Inclined plate 19 Ball | bowl 20a, 20b Guide part 21 Paper 22 Crank arm 23 Crank pin 24 Connection rod 25 Connection pin 26 Adjustment gear 27 Crank gear

Claims (5)

A paper feed plate for stacking paper bundles;
A paper feed roller that feeds the top sheet by pressing against the top surface of the sheet bundle;
A first surface member that includes a surface that can be pressed against the paper feed roller and separates two or more sheets that have been fed one by one;
In a sheet feeding device having a sheet feeding device, a sliding movement is made in the same direction as the sheet feeding roller shaft between an operating position that overlaps the first roller member separated from the sheet feeding roller and a retracted position that does not overlap the first roller member. In the working position, it has a second surface member that covers the surface of the first surface member and separates the paper by pressing against the paper feed roller instead of the first surface member. Paper feeding device to be used. A sabbath for moving the sagging surface of the first sabbing member from a contact position in contact with the outer peripheral surface of the paper feeding roller to a separation position at least a distance from the outer circumferential surface of the paper feeding roller by the thickness dimension of the second sabbing member. Having moving means;
When the second sucking member moves from the retracted position to the working position, the second sucking member enters between the first sucking member in the separated position and the outer peripheral surface of the paper feed roller without changing the position in the thickness direction. The sheet feeding device according to claim 1, further comprising a slide base that slidably supports the second plate.   The suction movement means is configured to move the first suction member between the contact position and the separation position by rotating about a rotation shaft in the same direction as the paper feed roller shaft. The sheet feeding device according to claim 2, wherein the sheet feeding direction inclination of the surface of the member is higher than the sheet feeding direction inclination of the surface of the first surface member.   The first sawbing member guides the movement of the second sawbing member in the sliding direction, and when it overlaps above the first sabaki member, the sagging surface of the first sabaki member and the sabering surface of the second sabaki member. 4. The sheet feeding device according to claim 1, further comprising a guide portion that defines a relative positional relationship between the sheet feeding device and the sheet feeding device. When the surface of either the second surface member or the first surface member is in a contact position where it contacts the outer peripheral surface of the paper feed roller, the second surface member has a restricting means for restricting the second surface member from sliding. The sheet feeding device according to any one of claims 1 to 4.

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