JP6031788B2 - Feeding device and recording device - Google Patents

Description

  The present invention includes a first friction member on the mounting surface, and a feeding member that feeds the recording medium by rotating in contact with the mounting member on which the recording medium is mounted on the mounting surface. The present invention relates to a feeding device that includes a roller and a pressing mechanism that presses the recording medium placed on the mounting member relative to the feeding roller, and a recording device that includes the feeding device.

  There are many types of recording media for recording devices such as inkjet recording devices. Recently, such as glossy New Year's cards, double-sided printing is possible, the friction coefficient on the front and back sides is different, and the friction coefficient on the glossy side is considerably larger than that of plain paper. When such a recording medium having a large coefficient of friction is placed with the glossy surface facing the loading surface of the feeding device, the gap between the friction member provided on the loading surface and the recording medium (glossy surface) The friction coefficient is larger than the friction coefficient assumed by the feeding device, and there is a problem of non-feeding in which the last recording medium cannot be fed by the feeding roller.

  In the following Patent Document 1, for a paper type such as a glossy New Year's card, the friction member of the mounting member is switched to one having a large friction coefficient under the problem of preventing double feeding based on the glossy surface. A sheet conveying apparatus having a corresponding configuration is disclosed.

JP 2009-7136 A

However, since the sheet conveying device described in Patent Document 1 is configured to change the friction member by moving the side guide, it can only deal with a specific size of paper, and has the same size but different friction coefficient. There was a problem that it was not possible to handle paper with the same friction coefficient but different sizes.
Specifically, it only describes solving the problem of double sheet feeding in the state of several last sheets, not one last sheet, and there is no description or suggestion about the problem of non-feeding one last sheet.

◆◆◆ Purpose ◆◆◆
The present invention is not limited to a recording medium of a specific size, and an object of the present invention is to reduce the occurrence of non-feeding in the delivery of the last recording medium.

  The feeding device according to the first aspect of the present invention includes a first friction member on the placement surface, and the recording medium is placed on the placement surface and rotates in contact with the recording medium. A feeding roller that feeds the recording medium, a pressing mechanism that presses the recording medium placed on the placement member relative to the feeding roller, and a recording medium on the placement member And a friction member switching mechanism that replaces the first friction member with a second friction member having a smaller friction coefficient than the first friction member based on information corresponding to the last one.

◆◆◆ Explanation of action ◆◆◆
The friction coefficients of the feeding roller and the friction member provided on the mounting member constituting the feeding device are the friction coefficient between the feeding roller and the recording medium is μ1, and the friction coefficient between the recording media is μ2. When the friction coefficient between the recording medium and the friction member is μ3, μ1> μ2 <μ3 and μ1> μ3 are set. The friction coefficients μ1 and μ3 can be changed in size by changing the material.
However, for example, if the material of the feeding roller is changed in order to further increase the friction coefficient μ1, the tendency of the influence of the solvent contained in the material at the time of manufacture usually increases from that material, and contact marks are formed on the recording medium. Another problem that often remains.
In addition, the range of change of the friction coefficient μ3 is not wide under the condition that μ2 <μ3 and μ1> μ3. If the friction coefficient μ3 is made smaller than the required value, in a feeding device having a structure in which recording media are stacked and placed in a vertically inclined posture, it becomes difficult to maintain the inclined posture, and the possibility of total collapse downward increases. Comes out. Further, even in the case of a feeding device having a structure mounted in a horizontal state, the stacked state is not stable, and as a whole, a tendency to be balked appears.
Therefore, it can be said that it is not easy to achieve the above object of the present invention with a combination of materials having fixed friction coefficients.
According to this aspect, the second friction member switching mechanism causes the first friction member to have the second friction coefficient smaller than that of the first friction member based on the information corresponding to the last sheet of the recording medium on the mounting member. It can be replaced with a friction member. Therefore, without being limited to a recording medium of a specific size, it is possible to reduce the occurrence of non-feeding in the delivery of the last recording medium.
The switching of the friction member can be performed either manually by the user or automatically.

  A feeding device according to a second aspect of the present invention includes a control unit that controls the operation of the friction member switching mechanism in the first mode, and the control unit obtains information corresponding to one last sheet. In this case, the first friction member is switched to the second friction member by driving the friction member switching mechanism.

  According to this aspect, since the friction member is automatically switched when the control unit obtains information corresponding to the last sheet, it is user-friendly without bothering the user.

  The feeding device according to a third aspect of the present invention is the feeding device according to the second aspect, wherein the control unit feeds the feeding roller by the first friction member as information corresponding to the last sheet. A first control mode is provided in which the friction member switching mechanism is driven using non-feed information that the operation is performed but the recording medium is not fed.

◆◆◆ Explanation of action ◆◆◆
When the recording medium placed on the placing member is the last sheet, if the recording medium cannot satisfy the condition of the friction coefficient μ1> μ3, it cannot be fed out by the feeding roller. It becomes a feed. When this non-feed is detected, a retry operation (this control is referred to as a “retry control mode”) is usually performed in which the feeding roller is rotated once again to apply a feeding force to the recording medium.
Since the recording medium cannot satisfy the condition of the friction coefficient μ1> μ3, the non-feed does not change even if the retry operation is executed.
According to the first control mode of this aspect, since this non-feed information is regarded as one last sheet, a dedicated sensor indicates that the recording medium remaining on the mounting member is in the last sheet state. It can be easily detected without using it. Therefore, the structure can be simplified and the occurrence of non-feeding in the delivery of the last recording medium can be reduced.
Furthermore, according to this aspect, neither the information on the type of the recording medium, which will be described later, nor the number information is required, and the control structure can be simplified.
In addition to non-feed due to the type of recording medium, it automatically responds to the last single non-feed based on a decrease in the coefficient of friction of the feeding roller over time. Can be reduced.

  In the feeding device according to a fourth aspect of the present invention, in the second aspect, the control unit obtains information on the type of the recording medium and information on the number of recording media placed on the mounting member. And a second control mode for driving the friction member switching mechanism.

In the recording apparatus, in addition to image data as recording data for recording execution, information on the recording medium such as the type of recording medium, whether the recording execution surface is front or back, the number of sets, etc. Or the like can be sent to the control unit. The information about the recording medium can be obtained by detecting all or part of the information with a dedicated sensor.
According to the second control mode of this aspect, since the friction member switching mechanism is driven based on the information about the recording medium, both the timing of the last sheet and the necessity of switching the friction member are determined in advance. be able to.

  A feeding device according to a fifth aspect of the present invention is the feeding device according to the fourth aspect, wherein the control unit includes the first control mode described in the third aspect, the first control mode and the second control mode. The control mode can be switched and executed.

  According to this aspect, since the first control mode and the second control mode can be switched and executed, if the first control mode is selected for a recording medium having no specific information about the recording medium, the last non-sheet Generation of feed can be reduced. If there is information about the recording medium and the second control mode is selected using that information, the last non-feed process can be omitted unlike the first control mode.

A recording apparatus according to a sixth aspect of the present invention includes a recording execution unit that performs recording by ejecting ink onto a recording medium, and first to fifth aspects that send the recording medium toward the recording execution unit. And a feeding device described in any one of the embodiments.
According to this aspect, the recording apparatus can obtain the same effects as those of the above aspects.

1 is a perspective view from the front side showing a schematic configuration of an ink jet recording apparatus including a feeding device according to Embodiment 1 of the present invention. The perspective view from the rear surface side of the feeder which concerns on the same Example 1. FIG. The perspective view from the front side of the center part vertical section of the feeder which concerns on the same Example 1. FIG. The perspective view from the rear surface side of the center part vertical section of the feeder which concerns on the same Example 1. FIG. The perspective view from the front side of the mounting member of the feeder which concerns on the same Example 1. FIG. The perspective view from the front side of the mounting member of the feeder which concerns on the same Example 1. FIG. The perspective view from the rear surface side of the mounting member of the feeder which concerns on the same Example 1. FIG. FIG. 6 is a perspective view from the front side illustrating a schematic configuration of an inkjet recording apparatus including a feeding device according to Embodiment 2 of the present invention. FIG. 6 is a perspective view from the front side showing a schematic configuration of an ink jet recording apparatus including a feeding device according to Embodiment 3 of the present invention.

◆◆◆ Example 1 ◆◆◆ (Figs. 1-7)
As shown in FIGS. 1 and 2, the ink jet recording apparatus 1 according to the present embodiment includes a recording execution unit 2 that performs recording by ejecting ink onto a recording medium, and a recording medium toward the recording execution unit 2. And a feeding device 3 for feeding out.

The feeding device 3 according to the present embodiment includes the first friction member 5 on the mounting surface 4, and the recording medium rotates on the recording medium in contact with the mounting member 6 on the mounting surface 4. Thus, a feeding roller 7 for feeding out the recording medium and a known pressing mechanism 8 for pressing the recording medium placed on the mounting member 6 against the feeding roller 7 are provided. ing.
A friction member that replaces the first friction member 5 with a second friction member 9 having a smaller friction coefficient than the first friction member 5 based on the information corresponding to the last sheet of the recording medium on the mounting member 6. And a switching mechanism 10.

The feeding device 3 according to the present embodiment has a structure in which recording media are stacked and placed in a vertically inclined posture. In the feeding device 3, a mounting member 6 is attached to a main body 11 with an upper end portion serving as fulcrums 12 and 13 and a lower end side thereof being swingable. Side guides 21 and 22 are provided on the mounting surface 4 of the mounting member 6 so as to be slidable in the width direction. The pressing mechanism 8 is configured such that the position of the feeding roller 7 is fixed and the mounting member 6 side is swung to press the recording medium against the feeding roller 7.
The first friction member 5 and the second friction member 9 are provided at the center in the width direction of the upper surface on the lower end side of the mounting member 6. The first friction member 5 and the second friction member 9 are formed of a single cork-like plate member, and the left and right one ends are the first friction member 5 and the other end is the second friction member 9. .
In FIG. 1, reference numeral 20 denotes a flat recess for providing the first friction member 5 and the second friction member 9. The concave portion 20 is formed to have such a length that the first friction member 5 and the second friction member 9 can slide in the lateral direction and switch positions.

The friction member switching mechanism 10 is provided on the back side of the main body 11 as shown in FIG. The friction member switching mechanism 10 of this embodiment includes a solenoid 14 and an arm 15, and the tip of the arm 15 is connected to the base portion 16 of the first friction member 5 and the second friction member 9. Then, when the solenoid 14 is operated, the first friction member 5 slides in the recess 20, and the second friction member 9 moves to a position facing the feeding roller 7.
FIG. 5 shows a state where the first friction member 5 is in a position facing the feeding roller 7, and FIG. 6 shows a state where the second friction member 9 is in a position facing the feeding roller 7.

The feeding device 3 according to the present embodiment includes a control unit 17 that controls the operation of the friction member switching mechanism 10. The control unit 17 drives the friction member switching mechanism 10 to switch the first friction member 5 to the second friction member 9 when information corresponding to the last sheet of the recording medium is obtained.
The control unit 17 controls the overall operation of the inkjet recording apparatus 1. Specifically, the operations of the first motor 18 and the solenoid 14, which are power sources of the recording execution unit 2, the feeding roller 7, and the conveying roller (not shown), and other driving units (not shown) To control.

  In the present embodiment, as the information corresponding to the last sheet, the control unit 17 performs the feeding operation of the feeding roller 7 by the first friction member 5, but the recording medium is not sent. The first control mode 23 for driving the friction member switching mechanism 10 using the non-feed information is provided.

Next, the operation will be described.
According to this embodiment, the friction member switching mechanism 10 causes the first friction member 5 to rub against the first friction member 5 based on information corresponding to the last sheet of the recording medium on the mounting member 6. It can replace with the 2nd friction member 9 with a small coefficient. Therefore, without being limited to a recording medium of a specific size, it is possible to reduce the occurrence of non-feeding in the delivery of the last recording medium.

Further, when the recording medium placed on the placing member 6 becomes the last recording medium, when the recording medium cannot satisfy the condition of the friction coefficient μ1> μ3, the feeding roller 7 sends out the recording medium. Because it is not possible, it becomes non-feed. When this non-feed is detected, a retry operation is normally performed in which the feeding roller 7 is rotated once again to apply a feeding force to the recording medium.
Since the recording medium cannot satisfy the condition of the friction coefficient μ1> μ3, the non-feed does not change even if the retry operation is executed.
According to the present embodiment, since this non-feed information is regarded as one last sheet, the fact that the recording medium remaining on the mounting member 6 is in the last sheet state can be easily obtained without a dedicated sensor. Can be detected. Therefore, the structure can be simplified and the occurrence of non-feeding in the delivery of the last recording medium can be reduced.
Further, according to the present embodiment, in addition to the non-feed caused by the type of the recording medium, the last single non-feed based on a decrease in the coefficient of friction with time of the feeding roller 7 is automatically performed. Correspondingly, the occurrence of non-feed can be reduced as well.

◆◆◆ Example 2 ◆◆◆ (Fig. 8)
FIG. 8 is a perspective view from the front side showing a schematic configuration of an inkjet recording apparatus including a feeding device according to Embodiment 2 of the present invention.
In the second embodiment, the control unit 17 drives the friction member switching mechanism 10 using information on the type of the recording medium and information on the number of recording media placed on the mounting member. Mode 24 is provided.

  Then, in addition to image data as recording data for recording execution, information on the recording medium such as the type of recording medium, whether the recording execution surface is front or back, the number of sets, etc. is controlled from a computer 25 such as a personal computer It can be sent to the unit 17. The information about the recording medium can be obtained by detecting all or part of the information by a dedicated sensor.

  According to the second control mode of the present embodiment, the friction member switching mechanism 10 is driven based on the information about the recording medium. Therefore, the timing of the last sheet and the necessity of switching the friction member are determined in advance. Can respond.

◆◆◆ Example 3 ◆◆◆ (Fig. 9)
FIG. 9 is a perspective view from the front side showing a schematic configuration of an inkjet recording apparatus including a feeding device according to Embodiment 3 of the present invention.
In the third embodiment, the control unit 17 includes both the first control mode 23 and the second control mode 24, and is configured to be able to execute by switching between the first control mode 23 and the second control mode 24. ing.

  According to this embodiment, since the first control mode 23 and the second control mode 24 can be switched and executed, if the first control mode 23 is selected for a recording medium having no specific information about the recording medium, the last control mode 23 and the second control mode 24 can be executed. The occurrence of single non-feed can be reduced. Further, when there is information about the recording medium, if the second control mode 24 is selected using the information, unlike the first control mode 23, the last non-feed process can be omitted.

◆◆◆ Other Examples ◆◆◆
The feeding device 3 and the ink jet recording apparatus 1 according to the present invention are basically configured to have the above-described configuration, but the partial configuration is changed or omitted within the scope not departing from the gist of the present invention. Of course, it is also possible to perform the above.

  Although the friction member switching mechanism 10 of the embodiment uses the solenoid 14, it is not limited to this. For example, instead of the electric structure, a structure that mechanically switches using a spring and each mechanism may be used.

  Further, the pressing mechanism 8 may be configured to operate by bringing the feeding roller 7 side into contact with and away from the mounting surface 4 of the mounting member 6.

  The first friction member 5 and the second friction member 9 are not limited to the structure of the above embodiment. For example, a shutter may be provided for the first friction member 5 and switching may be performed by opening and closing the shutter.

1 Inkjet recording device, 2 recording execution unit, 3 feeding device, 4 mounting surface,
5 first friction member, 6 mounting member, 7 feeding roller,
8 pressing mechanism, 9 second friction member, 10 friction member switching mechanism,
11 main body, 12 fulcrums, 13 branches,
14 solenoid, 15 arm, 16 base,
17 control unit, 18 first motor, 20 recess, 21 side guide 22 side guide, 23 first control mode, 24 second control mode,
25 computer

Claims (4)

A first friction member on the placement surface, and a placement member on which the recording medium is placed on the placement surface;
A feeding roller for feeding the recording medium by rotating in contact with the recording medium;
A pressing mechanism that presses the recording medium placed on the placing member relative to the feeding roller;
A friction member switching mechanism that replaces the first friction member with a second friction member having a smaller friction coefficient than the first friction member based on information corresponding to the last sheet of the recording medium on the mounting member;
A controller for controlling the operation of the friction member switching mechanism and driving the friction member switching mechanism when information corresponding to one last sheet is obtained to switch the first friction member to the second friction member; Prepared,
The control unit includes a second control mode for driving the friction member switching mechanism using information on the type of the recording medium and information on the number of recording media placed on the mounting member. A feeding device. The feeding device according to claim 1,
The control unit uses, as information corresponding to the last sheet, the non-feed information that the feeding roller performs the feeding operation by the first friction member but the recording medium is not fed. A first control mode for driving the friction member switching mechanism ;
The feeder is characterized in that the first control mode is executed when there is no information on the type of recording medium . In the feeding device according to claim 2,
The feeder can be executed by switching between the first control mode and the second control mode. A recording execution unit for performing recording by discharging ink to a recording medium;
A recording apparatus comprising: a feeding device according to claim 1 that feeds a recording medium toward the recording execution unit.

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