JPH07314813A - Ink jet recorder - Google Patents

Abstract

PURPOSE:To follow up the acceleration of a printing speed and the change of the size of a sheetlike recording medium. CONSTITUTION:A sheet discharge unit disposed at the downstream side of sheet feeding means of an ink jet recorder has a pair of support members 63a, 63b which are rotatably formed. A predetermined interval is provided between the members 63a and 63b. First guide plates 65a, 65b and second guide plates 67a, 76b are extended in a sheet discharge direction. The members 63a, 63b are rotated in synchronization with the operation of the feeding means. A sheetlike recording medium 10 discharged from the feeding means, placed on the plates 65a, 65b and first dried is dropped on the plates 67a, 67b, and second dried. Further, the medium 10 is dropped from the plates 67a, 67b by the rotations of the plates 63a, 63b and contained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus, and more particularly to an ink jet recording apparatus equipped with a sheet discharging device having a drying mechanism for a sheet recording medium after printing.

[0002]

2. Description of the Related Art An ink jet recording apparatus discharges an ink liquid from a recording head onto a sheet-shaped recording medium to perform print recording. In this case, if the sheet-shaped recording media after printing are stored in a laminated state, the ink on the printing surface of the uppermost sheet-shaped recording medium to be laminated adheres to the back surface of the next sheet-shaped recording medium to be laminated and becomes soiled. Occurred. Then, a paper discharge device of an ink jet recording apparatus which solves this problem is described in JP-A-1-145153 and JP-A-3-232657. In these paper discharge devices, members for supporting both ends of the sheet-shaped recording medium are provided in the paper discharge tray, and the sheet-shaped recording medium that is once printed and discharged is fixed to a certain amount necessary for the ink to be dried by the supporting member. It is configured to be supported for a certain period of time, and after a lapse of time for the ink liquid to dry, the ink liquid is dropped to the lower part of the tray to be stacked.

[0003]

However, in the above-described paper discharge device, the time required to complete the paper discharge is set until the paper is dried and stacked on the tray, so that the speed of the printing operation cannot be increased. Further, the dry state of the ink is not constant depending on the type of the sheet-shaped recording medium and the surrounding atmosphere, and there is an inconvenience that the ink is stacked in an undried state.

In view of the above, the present invention is provided with a paper discharge device capable of storing completely dried sheet-shaped recording media in a laminated state in an ink jet recording apparatus for forming an image by ejecting ink. And an inkjet recording device. Further, the present invention provides an ink jet recording apparatus in which the drying waiting time until ink drying is shortened to speed up printing. Further, the present invention provides an ink jet recording apparatus which can follow a change in size of a sheet-shaped recording medium with a simple structure.

[0005]

SUMMARY OF THE INVENTION An ink jet recording apparatus according to the present invention comprises a recording head for ejecting an ink liquid onto a conveyed sheet recording medium to perform recording, and a sheet recording for which printing has been completed in synchronization with a printing speed. Paper feeding means for ejecting the medium, a pair of support members arranged on both sides in the sheet advancing direction of the recording medium, a first guide plate projecting inward at the upper part of the support member, and a first guide. A second guide plate that projects inward at the lower part of the plate, and a paper discharge device that is arranged downstream of the print head and that stores the sheet-shaped recording media to be discharged in a stacked state. The pair of supporting members of the paper discharge device basically has a structure that rotates in synchronization with the discharge of the sheet-shaped recording medium by the paper feeding unit.

The discharged sheet-shaped recording medium is supported by the first guide plate to dry the ink liquid, and the supporting member rotates to drop onto the second guide plate.
And a second drying process for drying the ink liquid by being supported by the guide plate and being stacked in the paper discharge device by the rotation of the supporting member.

Further, the second guide plate of the support member of the paper discharge device is inclined with respect to the support member, and the projecting dimension of the second guide plate is longer than the projecting dimension of the first guide plate. To do.

Further, in the paper discharge device, when the small size support member is rotatably arranged at the bottom of the paper discharge device and the small size support member is erected parallel to the support member, the first guide is provided. The sheet-like recording medium ejected by the plate and the small size supporting member is supported.

[0009]

With the sheet-shaped recording medium on which an image is formed by the ink ejected from the recording head, the ink liquid is dried by the first drying on the first guide plate and the second drying on the second guide plate. Dry completely by drying. At the same time, since two sheets are supported and dried in the paper discharge device, the rotation of the support member of the paper discharge device can be set to (1/2) time of the time required for drying the ink liquid. The speed and paper feed speed can be increased.

When a small-sized recording medium is used as the sheet-shaped recording medium, the small-sized supporting member is rotated to stand up between the pair of supporting members, and one supporting member and the small-sized supporting member are supported. A small-sized recording medium discharged by a member is supported and dried. Therefore, the cycle of the operation of the paper feeding means from the recording head can be speeded up to (1/2) time of the drying time, which further speeds up printing.

[0011]

【Example】

First Embodiment A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an explanatory diagram showing an outline of an inkjet recording apparatus, in which a recording head 20 that forms dots on a sheet-shaped recording medium 10 by ejecting ink is provided. On the lower surface of the recording head 20, a paper feeding unit for ejecting the sheet-shaped recording medium 10 is arranged. The paper feeding means includes a transport roll 30 and a transport roll 3.
It is composed of a pinch roller 40 which is in pressure contact with 0. The transport roll 30 is driven by a motor (not shown) to rotate clockwise. On the downstream side of the transport roll 30 and the paper feeding means of the recording head 20, a paper discharge tray 6 for accommodating recorded (printed) sheet-shaped recording media 10 in a stacked state.
0 is set. A platen 50 and a rotatable sheet-shaped recording medium discharge brush 55 are arranged below the recording head 20 between the transport roll 30 and the sheet discharge tray 60.

The discharge tray 60 includes a bottom plate 61 on which a sheet to be discharged is placed, and a pair of left and right support members (wings) 63.
a and 63b. The support members 63a and 63b are configured to rotate with respect to the bottom plate 61 in directions in which they expand. The pair of support members 63a, 63b are provided with a predetermined interval, and first guide plates 65a, 65b and second guide plates 67a, 67b protruding inward of the tray 60 are arranged. The first guide plates 65a and 65b are fixed to the support members 63a and 63b horizontally with respect to the bottom plate 61. The second guide plates 67a and 67b are tilted at an angle of θ to support the support member 63.
It is fixed to a and 63b. And the first guide plate 6
The second guide plates 67a and 67b have a longer projecting dimension than the 5a and 65b.

In the ink jet recording apparatus having such a structure, the sheet-shaped recording medium 10 is supplied from a paper feeding section (not shown), held and conveyed by the transport roll 30 and the pinch roller 40, and the recording head 20. Is printed on the lower surface of the head by ink flying from the head. The sheet-shaped recording medium 10 after printing is ejected toward the sheet ejection tray 60 by the rotation operation of the sheet-shaped recording medium ejection brush 55.

Next, with reference to FIGS. 3 and 4, the process of discharging the sheet-shaped recording medium 10 after printing and storing it in the discharge tray 60 will be described. Ejection of the first sheet-shaped recording medium The leading edge of the first sheet-shaped recording medium 10 is the platen 5
The trailing end of the sheet-shaped recording medium is pushed by the rotation of the sheet-shaped recording medium discharging brush 50 and advances toward the sheet discharging tray 60. ......
4 (a) (b)

The side edges of the first sheet first drying the sheet-like recording medium 10 is advanced by being guided right and left pair of first guide plates 65a, to 65b, 1 1 th sheet-form recording medium 10 of the When placed on the guide plates 65a and 65b, the pair of left and right support members 63a and 63b that rotate in association with the rotation of the brush 55 expands. Support member 63
Both ends of the sheet-shaped recording medium 10 are released from the support of the first guide plates 65a and 65b by the expanding rotation of a and 63b,
It drops onto the second guide plates 67a and 67b arranged below. During this period, the ink liquid dries to some extent. ... Figure 4 (c)

Ejection of the second sheet recording medium and the first sheet
Second sheet of the sheet-shaped recording medium, the first sheet-shaped recording medium 10 is the second guide plate 67a,
Simultaneously with dropping onto 67b, the supporting members 63a and 63b rotate and return to their original positions. First guide plates 63a, 63b
The second sheet-shaped recording medium 101 is ejected and is pushed by the rotation of the sheet-shaped recording medium ejection brush 50 and advances. Both ends of the first sheet-shaped recording member 10 on the second guide plates 67a, 67b have second guide plates 67a, 67b.
It moves along the inclination of 67b, and gradually bends so that the central portion is slackened downward by its own weight. During this time, the ink liquid is completely dried. ... Figure 4 (d)

Storage of the first sheet recording medium in the tray
The second sheet-shaped recording medium is dried , and both ends of the first sheet-shaped recording medium 10 remain on the second guide plates 67a and 67b. Paper discharge operation of the recording medium 101, that is, the support member 63.
The second sheet-shaped recording medium 101 is dropped onto the second guide plates 67a and 67b by the unfolding rotation of a and 63b, and
The sheet-shaped recording medium 10 is the second guide plate 67a, 6
It is released from 7b and falls on the bottom plate 61 of the paper discharge tray 60. At this time, the ink of the first sheet-shaped recording medium is completely dried. ...... FIG. 4 (e) As described above, the falling of each sheet-shaped recording medium 10 progresses,
When n sheets have been stacked, the (n + 1) th sheet-shaped recording medium is supported by the second guide plates 97a and 97b,
The (n + 2) th sheet recording medium is the first guide plate 95.
A, 95b will guide you. And the support member 6
The second guide plates 97a, 97b by the rotation of 3a, 63b.
The (n + 1) th sheet-shaped recording medium supported by the above is stacked as the (n + 1) th sheet-shaped recording medium of the sheet-shaped recording medium already released from the guide plate and already laminated on the bottom plate 61. . The (n + 2) th sheet recording medium is released from the first guide plates 65a and 65b and drops onto the second guide plates 97a and 67b. ... Figure 4 (f)
(G)

Thus, one sheet-shaped recording medium is the first
A series of operation times until falling onto the guide plate, the second guide plate, and the bottom plate are set as the drying time in the inkjet recording apparatus. That is, the ink is dried while the sheet-shaped recording medium coated with the ink drops onto the first guide plate, the second guide plate, and the bottom plate, and the sheet-shaped recording medium is stacked in the discharge tray 60. However, it is possible to prevent ink from adhering to the back surface of the next stacked recording medium. Further, since the guide plates have a two-stage structure, the time for which the sheet-shaped recording medium is placed on each guide plate for drying is (1/2) hours of the set drying time T. In this way, since the time to be placed on each guide plate is (1/2) T time of the time T required for the ink liquid to dry, the printing and paper discharge operations are performed in the conventional drying time T cycle. It is twice as fast as the print speed and paper discharge speed. As described above, the discharge device of the inkjet recording apparatus according to this embodiment can increase the discharge speed and shorten the discharge operation, and thus can increase the print speed of the inkjet recording apparatus and shorten the print time. .

Second Embodiment A second embodiment of the present invention will be described with reference to FIGS. The paper discharge device of this embodiment is used for a small-sized sheet-shaped recording medium shorter than a specified size. In this case, the discharge tray 600 has a small size support member 700 arranged at a predetermined value on the lower surface of the center of the bottom plate 610 of the discharge tray similar to the first embodiment. The small size support member 700 is a plate member having substantially the same shape as the support members 630a and 630b, and is rotatably disposed on the bottom plate 610. The rotation of the small size support member 700 is not interlocked with the sheet-shaped recording medium discharge brush, and is used by rotating and standing up as needed. For example, when the discharged sheet-shaped recording medium is a small size such as an envelope or a postcard, the small-sized support member 700 is erected and fixed. The sheet-shaped recording medium 11 ejected after printing is supported by the supporting member 630b and the small size supporting member 700.

Sheet-shaped recording medium 1 after printing according to this embodiment
A process of discharging the sheet No. 1 from 1 to the sheet discharge tray 600 will be described. Eject the first small-sized sheet-shaped recording medium and
The first sheet-shaped recording medium 11 advances onto the discharge tray 600. At this time, one end of the sheet-shaped recording medium 11 is guided by the first guide plate 650b of the supporting member 630b and the other end is guided by the upper end of the small size supporting member 700. ......
FIG. 7A shows that the first sheet-shaped recording medium 11 is the first guide plate 650.
b, when placed on the small-size support member 700, the pair of left and right support members 63 are provided in the same manner as the configuration described in the first embodiment.
0a and 630b are expanded, and the sheet-shaped recording medium 11 is the first
Of the second guide which is released from the guide plate 650b of the
Onto the guide plate 670b. During this period, the sheet-shaped recording medium 11 is dried to some extent. ... Figure 7 (b)

Ejecting the second small-sized sheet recording medium
The first and second drying support members 630a and 630b are rotated and returned to their original positions. At this time, one end of the first sheet-shaped recording medium 11 falls and is supported on the second guide plate 670b, but since there is no guide plate on the small-size support member 700 side, the sheet-shaped recording medium 11 is not formed. The other end of is dropped onto the bottom plate 610. That is, the sheet-shaped recording medium 11 drops on the bottom plate 610 in an inclined state in which one end is supported by the second support member 670b. At the same time, the second sheet-shaped recording medium 111 is ejected onto the first guide plate 650b and advances. During this time, the first sheet-shaped recording medium 11 is completely dried, and the second sheet-shaped recording medium 11 is dried to some extent. ...... Figure 7
(C)

Storage of the first small sheet-shaped recording medium
After the storage and the second drying of the second sheet, the supporting members 630a and 630b are opened and rotated to 1
One end of the first sheet-shaped recording medium 11 has a first guide plate 65.
0a and 650b, and drops onto the bottom plate 610 of the paper discharge tray 600. Second sheet recording medium 111
Falls on the bottom plate 610 with one end supported by the second guide plate 670b. However, since the first sheet-shaped recording medium 11 and the second sheet-shaped recording medium 111 do not polymerize, contamination with the undried ink liquid does not occur. ...... Figure 7 (d)

As described above, when each sheet-shaped recording medium 11 is dropped and n sheets are stacked, the (n + 1) th sheet-shaped recording medium is supported by the second guide plate 670b. Then, it is dropped onto a sheet-shaped recording medium in which n sheets are laminated on the bottom plate 610. The (n + 2) th sheet recording medium advances while being guided by the first guide plate 950b and the small-sized support member 700. Then, the support members 630a and 630
The (n + 1) th sheet recording medium whose one end is supported by the second guide plate 970b by the rotation of b is the small-sized sheet recording medium 11 in which n sheets are already stacked on the bottom plate 610.
(N + 1) th sheet recording medium is laminated.
The (n + 2) th sheet recording medium is the second guide plate 97.
0b, one end is supported and stacked (n + 1)
It drops onto a small sheet-shaped recording medium in a tilted state. ... Figure 7 (e) (f)

Also in the case of this embodiment, since a series of operation time until one sheet of recording medium drops to the first guide plate, the second guide plate and the bottom plate is set as the drying time. The ink dries while one sheet of recording medium drops onto the bottom plate, and it is possible to prevent the ink from adhering after printing of the sheet recording mediums stacked in the discharge tray 600. Further, the guide plate has an upper and lower two-stage structure, and the time for which one sheet of recording medium stops in each state in each stage is (1/2) T time of the set drying time T. As described above, the discharge device of the inkjet recording apparatus according to this embodiment can also increase the discharge speed and shorten the discharge operation, can increase the print speed of the inkjet recording apparatus, and can reduce the size of envelopes and postcards. Printing time can be shortened for a recording medium of a size.

[0025]

In the ink jet recording apparatus of the present invention, the ink liquid on the sheet-shaped recording medium is dried in two stages, the first drying and the second drying. It is possible to increase the printing speed, and the printing speed can be increased accordingly.

Further, since the sheet-shaped recording media which are image-formed by the ink jet recording apparatus and accommodated in a laminated state are completely dried and then laminated, the printing surface of the uppermost sheet-shaped recording medium to be laminated is not dried. The conventional inconvenience that the ink adheres to the back surface of the next sheet-shaped recording medium on which the ink is laminated is eliminated. Further, the present invention is capable of following a change in size with a simple configuration even in the image formation of a small-sized sheet-shaped recording medium such as a postcard and an envelope, increasing the printing speed and the paper feeding speed, and completely drying. It is possible to stack in a state.

[Brief description of drawings]

FIG. 1 is an overall explanatory diagram of an inkjet recording apparatus including a paper discharge device according to the present invention.

FIG. 2 is an arrow view of the paper discharge device.

FIG. 3 is an explanatory diagram of the operation of the paper discharge device.

FIG. 4 is an explanatory view of the operation of the paper discharge device.

FIG. 5 is a side view of the paper discharge device according to the second embodiment.

FIG. 6 is a side view of the paper discharge device according to the second embodiment.

FIG. 7 is an operation explanatory view of the paper discharge device.

[Explanation of symbols]

10, 11, 101, 111 sheet recording medium, 2
0 recording head, 50 platen, 55 brush for discharging sheet-shaped recording medium, 60 paper ejection tray, 61 bottom plate, 63a, 63b, 630a, 630b support member, 65a, 65b, 650a, 650b first guide plate, 67a, 67b , 670a, 670b Second guide plate, 700 Small size support member.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65H 29/26 29/52

Claims (6)

[Claims] 1. A recording head for ejecting an ink liquid onto a conveyed sheet-shaped recording medium to perform recording and recording, a paper feed unit for discharging a printed sheet-shaped recording medium in synchronization with a printing speed, and a print head. In an inkjet recording apparatus that is provided on the downstream side of the sheet-like recording medium and that stores the sheet-shaped recording media to be ejected in a stacked state, And a second guide plate that projects inward at the lower part of the first guide plate, and a second guide plate that projects inward at the lower part of the first guide plate. The inkjet recording apparatus is configured such that the pair of support members rotate in synchronization with the ejection of the sheet-shaped recording medium by the paper feeding unit. 2. The discharging device includes a first drying means for supporting the sheet-shaped recording medium with a first guide plate to dry the ink liquid,
The ink jet recording apparatus according to claim 1, further comprising a second drying unit configured to support the sheet-shaped recording medium dropped on the second guide plate by the rotation of the supporting member by the second guide plate to dry the ink liquid. Recording device. 3. The ink jet recording apparatus according to claim 1, wherein the second guide plate of the support member of the paper discharge device is arranged so as to be inclined with respect to the support member. 4. The ink jet recording apparatus according to claim 1, wherein the protrusion size of the second guide plate of the paper discharge device is longer than the protrusion size of the first guide plate. 5. The ink jet recording apparatus according to claim 1, further comprising a paper discharge device in which a small size support member is arranged in parallel with the support member. 6. The small size support member is rotatably disposed at the bottom of the paper discharge device, and when the small size support member is erected parallel to the support member, the small size support member and the small guide plate are small. The inkjet recording apparatus according to claim 1, wherein the inkjet recording apparatus is configured to support a sheet-shaped recording medium discharged by a size support member.