JP4007262B2 - Feeding device and liquid ejecting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a feeding device and a liquid ejecting apparatus. In particular, the present invention relates to a feeding device and a liquid ejecting apparatus that can feed a recording material without tilting.
[0002]
[Prior art]
A liquid ejecting apparatus such as an ink jet recording apparatus includes a feeding device that feeds a recording material (for example, recording paper) placed on a tray to a recording area, and a recording material fed by the feeding device. It has a conveying device that conveys little by little. Recording is performed on the recording material by ejecting liquid (for example, ink) while shifting the recording material fed by the feeding device by the transport device.
As an example of the feeding device, there is one having a feeding roller driven by a motor and a retard roller biased toward the feeding roller. In such a feeding device, the feeding roller feeds the recording material by rotating with the recording material sandwiched between the retard roller.
[0003]
[Patent Document 1]
JP 2002-255417 (FIG. 1)
[0004]
[Problems to be solved by the invention]
The recording material is fed along the guide rib while the lower surface is supported by the guide rib. Further, the guide rib needs to have an opening in order to arrange the retard roller.
By the way, the liquid ejecting apparatus ejects liquid onto a recording material having a plurality of widths. For this reason, it is preferable that the feeding roller and the retard roller are arranged at a position in contact with the smallest recording material (for example, L size) and near the center of the recording material of another size (for example, A4). . However, with such an arrangement, the side of the smallest recording material may be located on the opening of the guide rib. In this case, the recording material is subjected to friction in contact with the guide rib only in one of the left and right sides of the feeding roller. For this reason, there is a possibility that the recording material is inclined during feeding.
[0005]
SUMMARY An advantage of some aspects of the invention is to provide a feeding device and a liquid ejecting apparatus that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.
[0006]
[Means for Solving the Problems]
That is, according to the first aspect of the present invention, it is used in a liquid ejecting apparatus that performs recording by ejecting liquid onto a recording material fed to the recording area, and feeds the recording material to the recording area. A feeding device for placing a recording object by placing it on a reference guide provided at one end of the recording object; and supporting the recording object fed from the placement part from below. The recording material is guided toward the recording area, the guide rib having the opening, the retard roller disposed below the opening, and the placement roller is disposed above the opening. A recording roller that rotates while being sandwiched between the recording roller and the retard roller, and feeds the recording material toward the recording area, and at least the end of the rotation axis of the retard roller opposite to the reference guide. A holding part that is rotatably held and an upper part of the holding part opposite to the reference guide Are, e Bei a holding cover portion for supporting the recording material being fed from below, the holding cover portion, of the recording medium feeding device should feed, the most width is smaller standard When the recorded material is fed, it is disposed at a position that supports the side of the recording material that faces the side that contacts the reference guide from below, and the holding portion cover portion is flush with the upper portion of the guide rib. The recording medium support surface for supporting the recording medium positioned at the top of the recording medium from below, and the recording medium supporting surface perpendicular to the feeding direction of the recording medium and positioned below the recording medium Provided is a feeding device having a preliminary regulating surface for pressing a leading end of a recording object .
According to this feeding device, the recording material is supported by the holding portion cover portion on the upper surface of the holding portion and is given friction. For this reason, even if the side opposite to the reference guide of the recording material passes over the opening, the recording material is given friction from both sides with respect to the feeding roller. Accordingly, the recording material is less likely to tilt during feeding.
[0007]
The holding unit cover unit is provided when a recording material having the smallest width among the recording materials to be fed by the feeding device, for example, when a longitudinal L-size recording material is fed. It is preferable to arrange the recorded material at a position that supports the side opposite to the reference guide. In this way, the feeding device can feed the recorded material without tilting when feeding the recorded material of the smallest standard.
[0008]
The holding portion cover portion is preferably provided integrally with the guide rib. If it does in this way, the attachment process of a holding | maintenance part cover part will become unnecessary. Further, the manufacturing cost of the holding part cover part is also reduced.
Further, it is preferable that the holding portion cover portion is flush with the guide rib in the portion that supports the recording material. In this way, the recording object is not caught at the boundary between the guide rib and the holding portion cover portion during feeding.
[0009]
A second aspect of the present invention is a liquid ejecting apparatus that performs recording by ejecting liquid onto a recording material fed to a recording area, and the recording material is provided on one end side of the recording material. And a guide rib having an opening for supporting the recording material fed from the mounting portion from below, guiding the recording material toward the recording area, and placing the recording material near the reference guide. And a retard roller disposed below the opening, and a recording material disposed above the opening and sandwiched between the retard roller and the recording material. A feed roller that feeds toward the recording area, a holding portion that rotatably holds at least the end of the rotating shaft of the retard roller opposite to the reference guide, and an upper portion of the holding portion opposite to the reference guide A holding part cover part for supporting the recording object being fed from below, Bei example, holding cover portion, of the recording medium liquid ejecting apparatus should feed, when the recording material of the most small width standard is fed, of the recording material, in contact with the reference guide It is arranged at a position to support the side opposite to the side from below, and the holding unit cover part is flush with the upper part of the guide rib, and supports the recording material located at the top of the recording material from below. Provided is a liquid ejecting apparatus having a recording medium support surface to be recorded and a preliminary regulating surface that is perpendicular to the feeding direction of the recording medium and presses the leading end of the recording medium positioned below . According to this liquid ejecting apparatus, the same effect as in the first embodiment is obtained.
[0010]
The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.
[0012]
FIG. 1 is a perspective view of an ink jet recording apparatus 10 according to an embodiment of the present invention. FIG. 2 is a view of the ink jet recording apparatus 10 shown in FIG. 1 cut along a plane that includes the straight line L and is perpendicular to the bottom surface of the ink jet recording apparatus 10, and the cut surface is viewed from the A direction. In FIG. 2, the ink jet recording apparatus 10 is in the middle of feeding the recording material 11 toward the recording area.
[0013]
The ink jet recording apparatus 10 includes a mounting tray 12 on which the recording object 11 is placed, a hopper 124 that pushes up the recording object 11 that is placed on the mounting tray 12 to a feeding path, and a substrate that is pushed up by the hopper 124. A feeding unit 20 (not shown in FIG. 1) that takes out the recorded material 11 one by one and feeds it toward the recording area, and a conveyance roller that conveys the recording material 11 fed by the feeding unit 20 to the recording area. 32, a transport driven roller 34, a recording head (not shown) that performs recording by ejecting liquid onto the recording material 11 transported to the recording area, a carriage 42 that mounts the recording head, and a carriage that straddles the recording area. Carriage drive motor 48 for scanning 42 in the main scanning direction, timing belt 49 for transmitting the driving force of the carriage drive motor 48 to the carriage, and the recording target. Discharge roller 52 and the follower roller 54 for discharging the Rokubutsu 11 from the recording area, and comprises a step motor 60. The placement tray 12 is an example of a placement portion, and a reference guide 123 provided on one end side in the width direction of the ink jet recording apparatus 10, that is, a carriage 42 is in a standby state by using a slide member 122. It is held in a state where it is brought close to the side (right side in FIG. 1). For this reason, when the recording material 11 has a different width, the position of the side opposite to the reference guide 123 changes.
[0014]
Power is transmitted from the step motor 60 to the transport roller 32 and the discharge roller 52 via a single endless belt 62. The power of the step motor 60 is transmitted to the feeding unit 20 and the hopper 124 via the drive shaft 36 of the transport roller 32 and the gear mechanism 38 provided at the end of the drive shaft 36. The endless belt 62 is tensioned by a tensioner (not shown). The step motor 60, the tensioner, the conveying roller 32, and the discharge roller 52 are arranged in this order in the flow direction of the endless belt 62. The conveyance roller 32 and the discharge roller 52 convey the recording material 11 every time the carriage 42 performs one scan in order to perform recording on the entire recording material 11.
[0015]
In addition, the feeding unit 20 includes a feeding roller 22 and a retard roller 24 that is pressed by the feeding roller 22 and rotates. The retard roller 24 is disposed at a position facing the feeding roller 22 across the feeding path of the recording material 11. The feeding roller 22 and the retard roller 24 are fed between the conveying roller 32 and the conveying driven roller 34 while bending the recording material 11 positioned at the top of the bundle of the recording materials 11 pushed up by the hopper 124. To send. Here, when only the recording material 11 positioned at the uppermost position comes between the feeding roller 22 and the retard roller 24, the retard roller 24 follows the recording material 11 fed by the feeding roller 22. Further, when a plurality of recording objects 11 come between the feeding roller 22 and the retard roller 24, the frictional force generated between the retard roller 24 and the recording object 11 is more than the frictional force generated between the recording objects 11. Because of the large size, the retard roller 24 does not rotate. For this reason, the recording medium 11 positioned at the uppermost position is fed by the feeding roller 22, but the other recording medium 11 is not fed because there is a frictional force with the retard roller 24.
The feeding unit 20 waits in the state shown in FIG. 2 after feeding the recording material 11 between the conveyance roller 32 and the conveyance driven roller 34 and then feeding the next recording material 11. Here, the arrangement positions of the feeding roller 22 and the retard roller 24 in the main scanning direction are the recording material 11 having the minimum width in the design of the ink jet recording apparatus 10 (specifically, the L size is fed vertically). And the reference guide 123 is a position in the vicinity of the opposite side.
The feeding unit 20 has a configuration for feeding the recording material 11 without tilting the recording material 11 even when the width of the recording material 11 is the smallest in design.
[0016]
Next, details of the feeding unit 20 will be described with reference to FIGS. 2, 3, and 4. FIG. 3 is a rear view of the feeding unit 20 as viewed from the back of the ink jet recording apparatus 10, that is, from the direction C in FIG. 2. FIG. 4 schematically illustrates the positional relationship between the main part of the feeding unit 20 and the recording material 11. FIG.
[0017]
As shown in FIGS. 2 and 3, the feeding unit 20 includes a holding unit 25 that rotatably holds the retard roller 24 in addition to the feeding roller 22 and the retard roller 24. The feed roller 22 is rotated by a step motor 60. The roller surface 22 a, which is a surface in contact with the recording material 11, has a substantially D shape that is cut out by a cut surface 22 b parallel to the rotation axis of the feeding roller 22. The roller surface 22a and the notch surface 22b wind and hold an elastic member 22e formed of a material (for example, an elastomer) having a high friction coefficient with respect to the recording material 11 along the rotation direction.
[0018]
The holding part 25 holds both ends of the rotation shaft of the retard roller 24 rotatably at one end. The holding unit 25 rotates about the other end of the holding unit 25, but is urged by an urging unit (not shown) so that the retard roller 24 rotates in a direction approaching the feeding roller 22. The rotation range of the holding unit 25 rotates from a position where the retard roller 24 does not interfere with any part of the feeding roller 22 to a position where the retard roller 24 presses the feeding roller 22.
[0019]
Further, the feeding unit 20 has a guide rib 26 as shown in FIGS. 2 and 3. The guide rib 26 guides the recording material 11 fed by the feeding roller 22 and the retard roller 24 to between the conveyance roller 32 and the conveyance driven roller 34 while supporting the recording material 11 from below. Here, the guide rib 26 has an opening 28. The feeding roller 22 is disposed above the opening portion 28, and the retard roller 24 and the holding portion 25 are disposed below the opening portion 28. The width of the opening 28 is slightly larger than the width of the holding portion 25. The retard roller 24 and the holding unit 25 rotate through the opening 28.
[0020]
By the way, the feeding roller 22 and the retard roller 24 are provided on the recording material 11 when the recording material 11 having the smallest design width, specifically, the L-size recording material 11 is fed in the vertical direction. It is preferable that it is disposed at a position where it is completely in contact. On the other hand, as the recording material 11, A4 recording paper is most often used in the vertical direction, and therefore the feeding roller 22 and the retard roller 24 are preferably arranged as close to the center as possible in the width direction of A4. . In order to satisfy these two requirements, the feeding roller 22 and the retard roller 24 are shown in FIG. 1 in the recording object 11 and the loading tray 12 when the L-size recording object 11 is fed in the vertical direction. It is preferable to arrange in the vicinity of the side on the slide member 122 side shown and on the inner side from this side. When arranged in this way, the side of the L-size recording material 11 sent in the vertical direction in contact with the slide member 122 does not contact the guide rib 26 as shown in FIG. 28 is located above. In this state, the L-sized recording material 11 receives a frictional force only on the reference guide 123 side with respect to the retard roller 24. For this reason, there is a possibility that the recording material 11 is inclined during feeding.
[0021]
On the other hand, in the present embodiment, the feeding unit 20 includes a holding unit cover unit 27. The holding portion cover portion 27 covers the upper portion on the slide member 122 side of the upper portion of the portion where the holding portion 25 holds the rotation shaft of the retard roller 24, and the recording material 11 being fed is viewed from below. To support. In addition, the holding | maintenance part cover part 27 has the thickness which does not interfere with the holding | maintenance part 25 which has rotated.
Specifically, the holding portion cover portion 27 is formed integrally with the guide rib 26. For this reason, the process of attaching the holding | maintenance part cover part 27 to the guide rib 26 is unnecessary. Moreover, the manufacturing cost of the holding | maintenance part cover part 27 also becomes low.
[0022]
The holding section cover section 27 has a recording material support surface 27a and a preliminary regulating surface 27b. The recorded object support surface 27a is substantially flush with the upper surface of the guide rib 26, and among the recorded objects 11 pushed up by the hopper 124, the uppermost recorded object 11 is supported while being supported from below. Guide between the feed roller 22 and the retard roller 24. Here, when the L-size recording material 11 is fed in the vertical direction, the recording material support surface 27a supports the side of the recording material 11 on the slide member 122 side from below. For this reason, the L-size recording material 11 fed in the vertical direction is supported from below on both the left and right sides with respect to the retard roller 24 and receives a frictional force. Therefore, the recording material 11 is fed in the direction in which it is to be fed instead of being inclined at the time of feeding. Further, since the recording object support surface 27 a and the guide rib 26 are flush with each other, the recording object 11 is not caught at the boundary between the recording object support surface 27 a and the guide rib 26.
[0023]
The preliminary regulating surface 27 b is substantially perpendicular to the feeding direction of the recording material 11, and the tip of the recording material 11 positioned below the bundle of the recording materials 11 pushed up from the mounting tray 12 by the hopper 124. Hold down. This makes it difficult for the recording material 11 to be double fed. Further, it is less likely that the multi-feed recording material 11 hits the retard roller 24 and bends downward.
[0024]
The ink jet recording apparatus 10 is an example of a liquid ejecting apparatus. The recording head of the ink jet recording apparatus is an example of a liquid ejecting unit of the liquid ejecting apparatus.
However, the present invention is not limited to these. Another example of the liquid ejecting apparatus is a color filter manufacturing apparatus that manufactures a color filter for a liquid crystal display. In this case, the color material ejecting head of the color filter manufacturing apparatus is an example of the liquid ejecting head. Still another example of the liquid ejecting apparatus is an electrode forming apparatus that forms electrodes such as an organic EL display and an FED (surface emitting display). In this case, the electrode material (conductive paste) ejecting head of the electrode forming apparatus is an example of the liquid ejecting head. Still another example of the liquid ejecting apparatus is a biochip manufacturing apparatus that manufactures a biochip. In this case, the bio-organic substance ejecting head of the biochip manufacturing apparatus and the sample ejecting head as a precision pipette are examples of the liquid ejecting head. The liquid ejecting apparatus of the present invention includes other liquid ejecting apparatuses having industrial use. The recording object 11 is an object on which recording, writing, or printing is performed by ejecting a liquid. For example, a recording substrate, a circuit board on which a circuit pattern such as a display electrode is printed, and a CD on which a label is printed. -ROM, preparations on which DNA circuits are printed are included.
[0025]
As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various changes or improvements can be added to the above embodiment. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.
[Brief description of the drawings]
1 is a perspective view of an ink jet recording apparatus 10. FIG. 2 is a cross-sectional view of the ink jet recording apparatus 10. FIG. 3 is a rear view of a feeding unit 20. FIG. 11 is a diagram schematically showing the positional relationship of 11 [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Inkjet recording device, 11 ... Recording object, 12 ... Loading tray, 12a ... Lower surface part, 20 ... Feeding part, 22 ... Feeding roller, 22a ... Roller surface, 22b ... Notch surface, 24 ... Retard roller , 25 ... holding section, 26 ... guide rib, 27 ... holding section cover section, 27a ... recording object support surface, 27b ... preliminary regulating surface, 28 ... opening, 32 ... transport roller, 34 ... transport driven roller, 42 ... Carriage 48 ... carriage drive motor 49 ... timing belt 52 ... discharge roller 54 ... discharge driven roller 60 ... step motor 62 ... endless belt 122 ... slide member 123 ... reference guide 124 ... hopper

Claims (4)

A feeding device that is used in a liquid ejecting apparatus that performs recording by ejecting liquid onto a recording material fed to a recording area, and that feeds the recording material to the recording area;
A placement unit that places the plurality of recording objects by placing them on a reference guide provided on one end side in the width direction of the feeding device; and
Supporting the recording material fed from the mounting portion from below, guiding the recording material toward the recording area, and a guide rib having an opening;
A retard roller disposed below the opening;
The recording material, which is arranged above the opening and is placed on the placement portion, rotates while being sandwiched between the retard rollers, and feeds the recording material toward the recording area. A feeding roller;
A holding portion that rotatably holds at least an end portion of the rotating shaft of the retard roller opposite to the reference guide;
A holding portion cover portion provided on a portion of the holding portion that holds the end portion of the rotating shaft opposite to the reference guide, and supporting the recording material being fed from below; ,
Bei to give a,
The holding unit cover unit is configured to provide the reference guide of the recording material when the recording material having the smallest width among the recording materials to be fed by the feeding device is fed. Is located at a position to support the side opposite the side that touches from below,
The holding portion cover portion is flush with the upper portion of the guide rib, and a recording material support surface that supports a recording material positioned at the top of the recording material from below, and the recording material A feeding device having a preliminary regulating surface that is perpendicular to a feeding direction and presses a leading end of the recording material positioned below the recording material . The feeding apparatus according to claim 1 , wherein the recording material having the smallest width is an L-shaped recording material in a vertical direction.   The feeding device according to claim 1, wherein the holding portion cover portion is provided integrally with the guide rib. A liquid ejecting apparatus that performs recording by ejecting liquid onto a recording material fed to a recording area,
A plurality of the recording objects, and a placement unit that places the recording objects on a reference guide provided on one end side of the recording objects; and
Supporting the recording material fed from the mounting portion from below, guiding the recording material toward the recording area, and a guide rib having an opening;
A retard roller disposed below the opening;
The recording material, which is arranged above the opening and is placed on the placement portion, rotates while being sandwiched between the retard rollers, and feeds the recording material toward the recording area. A feeding roller;
A holding portion for rotatably holding at least an end portion of the rotation axis of the retard roller opposite to the reference guide;
A holding portion cover portion provided on a portion of the holding portion that holds the end portion of the rotating shaft opposite to the reference guide, and supporting the recording material being fed from below; ,
Bei to give a,
The holding unit cover unit is configured to provide the reference guide of the recording material when the recording material having the smallest width among the recording materials to be fed by the liquid ejecting apparatus is fed. Is located at a position to support the side opposite the side that touches from below,
The holding portion cover portion is flush with the upper portion of the guide rib , and a recording material support surface that supports a recording material positioned at the top of the recording material from below, and the recording material A liquid ejecting apparatus having a preliminary regulating surface that is perpendicular to a feeding direction and that presses a leading end of the recording material positioned below .

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