JP2004010225A - Feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feeding device capable of reliably returning an object to be recorded which is not to be fed. <P>SOLUTION: The feeding device comprises a placing part 12 to hold an object 11 to be recorded; and a feed roller 22 rotating to feed the object 11 to be recorded. The object 11 to be recorded comprises a separating roller 24 pressed by the feed roller 22 as a force in a repressing direction is exerted on the placing part 12 and feeding the object 11 to be recorded to a recording position with the object 11 to be recorded 11 nipped between the separation roller and the feed roller 22; and a hopper 210 to move the end part of the object to be recorded in the placing part 12 to a contact point between the feed roller 22 and the separation roller 24. When two or more objects 11 to be recorded are moved to the contact point, the object 11 to be recorded not fed is pushed back to the placing part 12 by a pushing back member 100. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a feeding device for feeding a recording object. In particular, the present invention relates to a feeding device having a function of reliably returning a recording material that should not be fed.
[0002]
[Prior art]
2. Description of the Related Art A recording device such as an ink jet recording device includes a feeding device that supplies a recording material such as paper to a recording head. This feeding device has a function of taking out one recording material from a mounting portion on which a plurality of recording materials are mounted.
[0003]
[Problems to be solved by the invention]
In many cases, the feeding device receives a plurality of recording materials simultaneously from the placement unit. In this case, it is necessary to surely return the recording material that should not be fed to the mounting portion.
[0004]
Therefore, an object of the present invention is to provide a feeding device 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 embodiments of the present invention.
[0005]
[Means for Solving the Problems]
That is, according to one aspect of the present invention, a placement unit that holds a recording object, a feeding roller that rotates to feed the recording object to a recording position, and pushes the recording object back to the placement unit A separation roller that is pressed by the feeding roller while applying a force in the direction, and that feeds the recording material to the recording position with the recording material sandwiched between the feeding roller and a feeding roller that feeds the end of the recording material in the mounting portion. And a hopper that moves to a contact point of the separation roller, and a push-back member that pushes a non-fed recording object back to the mounting portion when two or more recording objects move to the contact point. A feeding device is provided.
[0006]
An elastic body for urging the push-back member in the direction of pushing the recording object back to the mounting portion, and a cam that rotates with the feed roller and moves the push-back member in the direction opposite to the push-back direction by rotation. Is also good.
The push-back members may be provided on both sides of the feed roller.
The portion of the push-back member that passes through the contact point may be bent in the push-back direction so as to form an acute angle with the tangent at the contact point of the separation roller when passing through the contact point.
The feeding roller may be separated from the separation roller after the start of feeding of the recording material, and the push-back member may push back the recording material when the feeding roller is separated from the separation roller. In this case, the feeding roller has a cross-sectional shape in which a part of a circle is cut away, and the cutout may be separated from the separation roller after the start of feeding of the recording material.
[0007]
Note that the above summary of the present invention does not list all of the necessary features of the present invention, and a sub-combination of these features may also be an invention.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are solutions of the invention. It is not always necessary for the means.
[0009]
FIG. 1 is a schematic front view of an ink jet recording apparatus 10 which is an example of a feeding apparatus, and FIG. 2 is a schematic side view showing an internal configuration of the ink jet recording apparatus 10. The ink jet recording apparatus 10 has a mechanism for pushing back the recording material that has not been fed.
As shown in FIG. 2, the ink jet recording apparatus 10 includes a placement unit 12 that holds a plurality of recording materials 11 and a feeding unit that takes out one recording material 11 from the placement unit 12 and feeds the recording material 11 for printing. The feeding unit 20, the conveyance unit 30 that transmits power in the feeding direction to the recording material 11 fed by the feeding unit 20, the printing unit 40 that prints on the recording material 11, and the printed recording material 11. A discharging unit 50 for transmitting power in the discharging direction is provided in this order in the feeding direction.
[0010]
The feeding unit 20 includes, for example, a substantially fan-shaped feeding roller 22 that is rotated by a motor (not shown), and a separation roller 24 that is pressed by the feeding roller 22 while applying a force in a push-back direction to the recording material 11. By sandwiching the recording material 11 at the contact point between the feed roller 22 and the separation roller 24, the recording material 11 is separated one by one and fed to the transport unit 30.
[0011]
The transport unit 30 includes a transport roller 32 that is rotated by a motor 60, and a transport driven roller 34 that follows the transport roller 32. By sandwiching the recording object 11 at a contact point between the transport roller 32 and the transport driven roller 34, The recording material 11 fed by the feeding unit 20 is fed to a lower part of the printing unit 40.
[0012]
The printing unit 40 includes a carriage 42 on which the ink cartridge is mounted, a head unit 44 that is provided on a surface of the carriage 42 facing the recording medium 11, and discharges ink, a shaft hole 46 provided on the carriage 42, And a guide shaft 48 for slidably supporting the carriage 42 in a direction substantially perpendicular to the feeding direction, and a control unit 49 for controlling printing. The head section 44 has a plurality of ink ejection ports arranged along the feeding direction of the recording material 11.
[0013]
The discharge unit 50 includes a discharge roller 52 that is rotated by a motor 60, and a discharge driven roller 54 that rotates with the discharge roller 52. By sandwiching the recording material 11 at a contact point between the discharge roller 52 and the discharge driven roller 54. Then, the printed recording material 11 is discharged.
[0014]
The transport driven roller 34 is provided above the transport roller 32 and closer to the head 44 than the transport roller 32, and the discharge driven roller 54 is provided above the discharge roller 52 and closer to the head 44 than the discharge roller 52. Can be Thereby, the recording material 11 bends downward at a position facing the printing unit 40.
[0015]
In the configuration described above, the ink jet recording apparatus 10 ejects ink while reciprocating the head unit 44 along the guide shaft 48. The inkjet recording apparatus 10 prints the entire recording object 11 by feeding the recording object 11 each time the head unit 44 performs one scan. Note that the head unit 44 may perform printing on both the outward route and the return route, or may perform printing on only one of the routes.
[0016]
Power is transmitted from the motor 60 to the transport unit 30 and the discharge unit 50 via a single belt 62. The belt 62 is tensioned by a tensioner 64. The motor 60, the tensioner 64, the transport unit 30, and the discharge unit 50 are arranged in this order along the flow direction of the belt 62.
[0017]
The feeding roller 22 has a shape in which a part of a circle is cut out in a cross-sectional shape, and the cutout separates from the separation roller 24 after the feeding of the recording material 11 is started.
[0018]
FIG. 3 is a cross-sectional view illustrating a detailed configuration of the mounting unit 12 and the feeding unit 20. This example shows the state of the placement unit 12 and the feeding unit 20 during the feeding of the recording material 11 to the transport unit 30.
[0019]
The receiver 12 has a receiver main body 200 and a hopper 210. The mounting portion main body 200 has a mounting surface 202 having a substantially L-shaped cross section and a lower surface inclined such that the open end faces upward for mounting the recording object 11. Further, the receiver main body 200 has an inclined surface 204 for guiding the recording object 11 in the direction of the feeding unit 20. Then, a plurality of recording materials 11 are placed by supporting the recording material 11 on the lower surface and the vertical surface. The hopper 210 is a plate-shaped member arranged along the surface on the vertical side of the mounting portion main body 200 and with its lower end located near the lower surface of the mounting portion main body 200, and is provided at the upper end portion. It turns around the turning shaft 212. The rotation operation is performed by a cam (not shown) synchronized with the rotation of the feed roller 22. That is, the hopper 210 pushes the recording object 11 out of the placing section main body 200 and drops it into the feeding section 20 by rotating the lower end portion to a position protruding from the lower surface of the placing section main body 200.
[0020]
The feeding unit 20 includes, in addition to the feeding roller 22 and the separation roller 24, a push-back member 100 that pushes the recording material 11 that has not been fed by the feeding unit 20 back to the placement unit 12, and a direction in which the recording material 11 is pushed back. An elastic body 104 for urging the push-back member 100, a lever 110 integrated with the push-back member 100, and a cam 120 for moving the push-back member 100 via the lever 110 are provided.
[0021]
The shape of the push-back member 100 is plate-like, and one end 102 is bent upward, that is, toward the mounting portion 12. In addition, the push-back member 100 rotates about a shaft 112 provided at the opposite end of the end portion 102. The shaft 112 is provided, for example, upstream of the separation roller 24 in the feeding direction and below the shaft of the separation roller 24. The position of the shaft 112 is set so that the end portion 102 passes through the contact points of the drive roller 22 and the separation roller 24 when the end portion 102 rotates. That is, the push-back member 100 pushes up the lower end of the recording material 11 at the end 102. Here, when the end portion 102 passes through the contact point, it has an acute angle in the rotation direction with respect to the tangent line of the separation roller 24 at the contact point, so that the recording material 11 can be pushed up reliably.
[0022]
The elastic body 104 is, for example, a coil spring, and one end thereof is fixed to a substantially intermediate portion between the end portion 102 of the push-back member 100 and the shaft 112, and the other end is located above one end of the elastic body 104 and upstream in the feeding direction. It is fixed to a key-shaped projection 106 provided on the side. The protrusion 106 is provided on the back side of the mounting surface 202 of the mounting portion main body 200.
[0023]
The cam 120 has a substantially fan-shaped cross-section, and has two curved surfaces in the radial direction that are curved inward. The rotation center of the cam 120 is fixed to the shaft 26 of the feed roller 22, and the cam 120 is opened after the push-back member 100 is moved via the lever 110 in a direction opposite to the push-back direction.
[0024]
That is, the push-back member 100 is moved in the direction opposite to the push-back direction with the rotation of the cam 120, and returns to the push-back direction by the urging force of the elastic body 104 when released from the cam 120. At this time, the end portion 102 of the push-back member 100 pushes the recording object 11 back to the mounting portion 12.
[0025]
FIG. 4 is a cross-sectional view illustrating a state of the placement unit 12 and the feeding unit 20 immediately before the feeding of the recording material 11 to the transport unit 30 is completed. In this example, the hopper 210 of the receiver 12 has returned to the vertical side of the receiver main body 200.
The feed roller 22 is just before leaving the separation roller 24. Further, the lower end of the recording material 11a that has not been fed is located near the contact point between the feeding roller 22 and the separation roller 24. At this timing, the cam 120 opens the lever 110 and the push-back member 100 so that they are pushed back by the elastic body 104. As a result, as shown in this figure, the end portion 102 of the push-back member 100 hits the lower end of the recording material 11a immediately before or at the moment when the feeding roller 22 separates from the separation roller 24. Further, since the timing at which the end 102 abuts on the recording material 11a is mechanically set, the end 102 can be reliably brought into contact with the lower end of the recording material 11a at a desired timing.
[0026]
FIG. 5 is a cross-sectional view illustrating a state of the placement unit 12 and the feeding unit 20 immediately after the feeding of the recording material 11 to the transport unit 30 is completed. In this example, the state of the mounting portion 12 is substantially the same as that in FIG.
The feed roller 22 is completely separated from the separation roller 24. The end portion 102 of the push-back member 100 pushes back the recording object 11a from the lower end by the urging force of the elastic body 104. At this time, the end portion 102 also comes in contact with the fed recording material 11, but the recording material 11 is creased because it is already located downstream of the feeding roller 22 except for the upper end portion. Without being pushed up by the end 102. Therefore, the rotation of the push-back member 100 does not affect the feeding of the recording object 11.
[0027]
FIG. 6 is a cross-sectional view illustrating a state of the placement unit 12 and the feeding unit 20 in a state where the operation of the push-back member 100 has been completed. In this example, the end portion 102 of the push-back member 100 has been rotated to a position where the bent portion is located above the end portion of the placing portion main body 200 on the feeding portion 20 side. For this reason, the lower end of the member to be printed 11 a slides down on the receiver main body 200. As a result, the printing member 11a is stably mounted on the mounting portion 12 again.
[0028]
Therefore, according to the present embodiment, it is possible to reliably return the recording material 11 a dropped into the feeding unit 20 but not fed to the placement unit 12.
[0029]
FIG. 7 is a perspective view showing the placing section 12 together with a part of the feeding section 20. The slope 204 of the mounting portion main body 200 has an opening 206 at a portion facing the push-back member 100. The opening 206 is formed so as to include the rotation range of the push-back member 100 so that the mounting portion main body 200 does not hinder the rotation operation of the push-back member 100. As a result, the push-back member 100 can push back the recording object 11 even though the shaft 112 of the push-back member 100 is disposed on the back surface of the placement section main body 200. Note that a plurality of push-back members 100 can be received at positions separated from each other.
[0030]
FIG. 8 is a plan view showing a planar arrangement of the feeding unit 20.
The lever 110 and the cam 120 are provided outside the feeding path of the recording material so as not to hinder the feeding of the recording material 11.
A plurality of push-back members 100 are provided on the shaft 112. Preferably, at least one push-back member 100 is provided on both sides of the feed roller 22 and the separation roller 24. With this configuration, the push-back member 100 does not cantilever the recording object 11. Therefore, the push-back member 100 can push back the unrecorded recording material 11a more reliably.
[0031]
As described above, the present invention has been described using the embodiment. However, the technical scope of the present invention is not limited to the scope described in the embodiment. Various changes or improvements can be added to the above embodiment. It is apparent from the description of the appended claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.
[0032]
【The invention's effect】
As is apparent from the above description, according to the present invention, the recording material that has not been fed can be reliably returned to the mounting portion.
[Brief description of the drawings]
FIG. 1 is a schematic front view of an ink jet recording apparatus 10 which is an example of a printing apparatus.
FIG. 2 is a schematic side view showing an internal configuration of the printing apparatus 10;
FIG. 3 is a cross-sectional view illustrating a detailed configuration of a mounting section 12 and a feeding section 20.
FIG. 4 is a cross-sectional view illustrating a state of the placement unit 12 and the feeding unit 20 immediately before the feeding of the recording medium 11 is completed.
FIG. 5 is a cross-sectional view illustrating a state of the placement unit 12 and the feeding unit 20 immediately after the feeding of the recording material 11 is completed.
FIG. 6 is a cross-sectional view illustrating a state of the mounting unit 12 and the feeding unit 20 in a state where the operation of the push-back member 100 has been completed.
FIG. 7 is a perspective view showing the mounting section 12 together with a part of the feeding section 20.
FIG. 8 is a plan view showing a planar arrangement of the feeding unit 20;
[Explanation of symbols]
12 Placement part 22 Feed roller 24 Separation roller 210 Hopper 100 Push-back member 104 Elastic body 120 Cam

Claims (6)

A receiver for holding a recording object;
A feed roller that rotates to feed the recording object to a recording position,
A separation roller that is pressed by the feed roller while applying a force in a direction of pushing the recording object back to the placement unit, and that feeds the recording material to the recording position with the recording material interposed between the feeding roller and the feeding roller; When,
A hopper for moving an end of the recording medium in the placement section to a contact point of the feed roller and the separation roller,
A feeding device, comprising: a push-back member that pushes back the unrecorded recording material to the placement section when two or more of the recording materials move to the contact point. An elastic body that urges the push-back member in a direction to push the recording object back to the mounting portion,
The feeding device according to claim 1, further comprising a cam that rotates with the feeding roller and moves the push-back member in a direction opposite to the push-back direction by the rotation. The feeding device according to claim 1, wherein the push-back members are provided on both sides of the feeding roller. The portion of the push-back member passing through the contact point is bent in the push-back direction so as to form an acute angle with respect to a tangent at the contact point of the separation roller when passing through the contact point. 2. The feeding device according to 1. The feeding roller is separated from the separation roller after the start of feeding of the recording material,
The feeding device according to claim 1, wherein the push-back member pushes back the recording material when the feeding roller separates from the separation roller. 6. The feeding roller has a shape in which a part of a circle is cut out in a cross-sectional shape, and is separated from the separation roller after the feeding of the recording material is started by the notch. 2. The feeding device according to claim 1.

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