JPH03138230A - Sheet transfer device for recording device - Google Patents

Abstract

PURPOSE:To eliminate the catching of a sheet to improve sheet carrying performance and to prevent a jam by mounting at least one of the sheet guides of a carrying means to the main body of a device or a sheet loading means, and swinging the one at the time of taking in or out the sheet loading means. CONSTITUTION:When a sheet loading means is taken in or out from the main body 1a of a device, at least one of the sheet guides 8a, 8b of a carrying means 6, 7 mounted to the main body 1a of the device or the sheet loading means 11 is swung to be evacuated from a space required for the taking-in, taking-out of the sheet loading means 11. The inferior transfer of sheets can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a sheet conveyance device in a recording apparatus such as an inkjet printer, and more particularly to the structure of a sheet guide in a sheet conveyance device.

(B) Conventional technology Conventionally, in a sheet conveying device for loading and unloading a sheet loading means such as a cassette loaded with sheets, a conveying guide of the device body is attached to a portion excluding the space necessary for loading and unloading the sheet loading means. Ta.

(C) Problems to be Solved by the Invention However, in the conventional example described above, as shown in FIG.
This is a space below the upper surface of the separating claw tray, and the lower guide C, paper feed roller d, etc. are arranged above the upper surface of the separating claw tray.

To further explain the lower guide C, when the sheet Ps to be fed is curled downward, the sheet P1 is inserted into the gap f between the upper end of the intermediate wall e of the cassette C and the lower end of the lower guide C. The tip of the paper enters the paper, causing poor conveyance and jamming.

There is a drawback that such a problem occurs noticeably on sheets that have been passed through the paper several times or when the humidity has changed.

Therefore, the present invention makes the portion located below the sheet guide swingable so that the portion is evacuated from the space required when loading and unloading the sheet loading means.
It is an object of the present invention to provide a sheet conveyance device in a recording apparatus that can prevent sheet conveyance defects.

(d) Means for resolving lesson order The present invention was made in view of the above circumstances, and includes:
For example, when shown with reference to FIGS. 1 and 5, conveyance means (6, 7, 10) for conveying a sheet (P) to be recorded in the recording apparatus main body (1a), and the apparatus main body (1a)
In the sheet feeding device of the recording apparatus (1), the sheet feeding device (11) has a sheet stacking device (11) that can be freely put in and taken out in the conveying direction of the sheet (P).
At least a part (8b, 22) of the sheet guides (8a, 8b, 21.22) of 1) is attached to the apparatus main body (1a) or the sheet loading means (11), and the sheet loading means (11) It is characterized in that at least the part (8b, 22) is configured to be swingable when taking in and out.

(f) Function Based on the above configuration, the sheet stacking means (11) is mounted in the direction of conveying the sheet (P) of the recording device (1), and the conveying means (6, 7° 10) The sheet is conveyed to record an image, and the sheet stacking means (11
) when the sheet (P) runs out, the sheet stacking means (11) is taken out and the sheet (P) is replenished. In this way, when loading and unloading the sheet loading means (11) from the apparatus main body (1a), the apparatus main body (1a)
a) or a sheet guide (8a,
At least a portion (8b, 22) of the sheets (8b, 21, 22) swings and retreats from the space required for loading and unloading the sheet stacking means (11).

The reference numerals in parentheses are for illustrative purposes only, and do not limit equivalent configurations.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4.

In FIG. 1, 1 is an inkjet printer;
A carriage 3 that reciprocates along a main scanning rail 2 is provided on the upper left side of the inkjet printer 1, and an inkjet head 4 is fixed to this carriage 3.

A fixed guide 5 is provided below this inkjet head 4, and conveyance roller pairs 6.7 are provided on both left and right sides of this guide 5.
is fixed to the upper guide 8a or the main body 1a in close proximity to the upper guide 8a or the main body 1a,
A lower guide 8b supported by a shaft 8c fixed to the main body 1a is provided opposite to the upper guide 8a, and a cam portion 9 is protruded from the back surface of the lower guide 8b. A half-moon-shaped paper feed roller 10 is attached to the main body 1a adjacent to the right side of the upper and lower guides 8a and 8b.

Further, a cassette insertion opening 12.13 is provided into which the cassette 11 can be inserted without being interfered with by the lower ends of the transport roller pair 6.7 and the paper feed roller 1o. , and has a partition member 14 on the left side of the middle part, and this partition member 1
The top portion 14a of No. 4 is formed in a mountain shape. Further, as shown in FIG. 1, the cassette 11 is provided with a recess 15 in the front and rear side plates 11a, so that the cam portion 9 of the lower guide 8b can be engaged therewith. Further, this lower guide 8b is urged downward by a spring or the like (not shown).

In addition, 16 is a sheet separation claw, 17 is a middle plate that loads the sheets P and urges it upward, 18 is a spring that urges the middle plate 17 upward, and 19 is a paper discharger attached to the left side plate of the main body 1a. It's a tray. Also, a grip piece 11b is attached to the left end of the cassette 11.
is protruding downward.

Since the present embodiment is constructed as described above, as shown in FIG. 1
1 is inserted into the cassette insertion slot 12.13 in the direction of the arrow, the cam part 9 of the lower guide 8b, which is urged downward, pushes against the side plate 1.
After being pressed against the right side of 1a, the cassette 11 is inserted by sliding on the side plate ILa. When the cam portion 9 engages with the recess 15, the cassette 11 is positioned in the main body of the apparatus, as shown in FIG.

In this state, the recording signal causes the paper feed roller 10 to move the sheet P
The uppermost sheet P is moved to the upper and lower guides 8a.

The inkjet head 4 records on the sheet P while the sheet is fed toward the sheet P and then conveyed by the conveyance rollers 6.7.

In the above, since the tip of the lower guide 8b is located below the top 14a of the partition member 14 of the cassette 11, the tip of the sheet P does not enter between the lower guide 8b and the cassette 11, and the sheet is fed. Paper or smoothly done.

When the cassette 11 is taken out in the direction of arrow B as shown in FIG.
Slide on a. Even if the separation claw 16 interferes,
The lower guide 8b swings and retreats from the separating claw 16.

Next, another embodiment will be described with reference to FIGS. 5 and 6.

In this embodiment, a cam portion 2o is attached to the device main body 1a, and a recess 20a is provided in the cam portion 2o. In addition, a lower guide 21 facing the upper guide 8a
A triangular swing guide 22 supporting the lower part of the swing guide 22 is pivotally supported by a shaft 23 fixed to the cassette 11.
A compression spring 24 is interposed between the lower side of 2 and the partition member 14. Then, the cassette 11 or the main body 1a of the device [
When the hand is in the operating position, the recess 20
It is designed to be positioned by engaging with a.

Thus, when loading and unloading the cassette 11, the swinging guide 22 slides on the cam portion 2° of the device main body 1a, and even if something interferes with the swinging cam 22, the swinging guide 22 The tapered surface of the upper part allows the cassette 11 to be retracted against the biasing force of the compression spring 24, and the cassette 11 can be taken in and out.
Since it is located slightly above the position, the same effect as in the previous embodiment is achieved.

Note that FIG. 6 shows the state immediately before reaching the operating state position.

Note that the present invention can be applied to an image forming apparatus in which a cassette is inserted throughout the apparatus main body.

(G) As described in detail, according to the present invention, at least a part of the sheet guide of the conveying means attached to the apparatus main body or the sheet stacking means moves the sheet stacking means into and out of the apparatus main body. In order to avoid interference between the main body of the apparatus and the sheet loading means, at least a portion of the sheet may be disposed at a position where it interferes with the sheet loading means, thereby preventing the sheets from getting caught. This improves sheet conveyance and prevents jams.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing an embodiment of the present invention, FIG. 2 is a longitudinal side view showing the state immediately before the cassette is inserted, FIG. 3 is a longitudinal side view showing the initial stage of the cassette insertion, and FIG. FIG. 5 is a perspective view showing the relationship between the lower guide and the cassette, FIGS. 5 and 6 are vertical side views showing other embodiments, and FIG. 7 is a vertical side view of a conventional inkjet printer. 1...Recording device (inkjet printer) 1a...
・Device main body 6, 7.10... Conveyance means (conveyance roller, paper feed roller) 8a, 8b, 21.22・
・・Sheet guide (upper guide, lower guide, swing guide)
8b, 22...-part 11... Sheet loading means (cassette), P... Sheet

Claims (1)

[Scope of Claims] 1. In a sheet feeding device in a recording apparatus, which has a conveying means for conveying sheets to be recorded in a recording apparatus main body, and a sheet stacking means that can be freely put in and taken out in the conveying direction of the sheet in the apparatus main body. , at least a part of the sheet guide of the conveyance means is attached to the apparatus main body or the sheet stacking means, and at least the part is configured to be swingable when the sheet stacking means is taken in and out. A sheet conveying device in a recording device.