JP2902259B2 - Paper transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device for conveying a sheet.

[0002]

2. Description of the Related Art Some conventional paper transport apparatuses have a print head provided along the paper transport path. The print head prints on the paper conveyed in the paper conveyance path.

[0003]

When a paper jam occurs in the vicinity of the above-described print head, in order to take out the paper, the print head is forcibly separated from the platen by a movable gap and the paper is taken out from the gap. Otherwise, the jammed paper must be taken out by manually rotating the conveying rollers and the like little by little, and complicated procedures must be taken, and the jammed paper cannot be easily removed.

[0004]

According to a first aspect of the present invention, there is provided a paper transport apparatus in which a slide frame to which a transport unit is attached is attached to a housing so as to be able to be pulled out in a horizontal direction.
The lower transport unit and the upper transport unit are opposed to each other to form a paper transport path therebetween, a fixed frame is attached to the slide frame, and one of the lower transport unit and the upper transport unit is attached. that provided vertically oriented to said fixed frame support frame located at a position deviated to the sheet conveying path
Horizontal by a support shaft provided on the back side of the pull-out direction together with
To be pivoted from the near side in the drawing direction .

[0005]

[Action] pulling the conveying unit from the housing, rotates the supporting frame the pivot axis as a fulcrum, the support frame
Lower transfer unit and upper transfer unit
One of the knits is pivoted forward to open the paper transport path. For this reason, the paper jammed in the paper transport path can be removed. At this time, since the fulcrum shaft is outside the paper transport path, the rotated transport unit is moved outside the paper transport path. Therefore, the sheet transport path can be largely opened, and the sheet can be easily removed. In addition, since the fulcrum shaft to which the support frame is attached has a vertical axis, the support frame rotates in the horizontal direction. For this reason, support
When the arm is rotated, it does not vigorously rotate due to its own weight, thereby preventing the support frame from violently colliding with another portion and damaging the device. Then, moving in a direction for accommodating the support frame in a state in which opens the paper transportation path in the housing, the support frame remains open strikes the housing. However, the support frame pivots in the horizontal direction as described above, and its fulcrum axis is located at the back side in the pullout direction. The impacted support frame rotates in the direction to close the sheet transport path due to the impact. For this reason, the impact is alleviated, and damage to the device is prevented.

[0006]

An embodiment of the present invention will be described with reference to the drawings. The paper transport apparatus of the present embodiment is applied to a processing apparatus of a type that performs printing processing on so-called cut-sheet paper and stores and stores the cut-sheet paper. As shown in FIG. A paper conveyance path 3 having a substantially U-shaped reversing portion and communicating with a stacker (not shown) is provided from 1 to the print head 2 and further downstream. Further, in this processing apparatus, an internal mechanism is attached to a slide frame 5 that can be horizontally pulled out toward the front from a main body case 4 that is a housing. The maintenance and the like of the mechanism can be performed.

The paper transport path 3 is formed between the lower transport unit 6 and the upper transport unit 7 as shown in FIG. The lower transport unit 6 includes a transport belt 8 along the paper transport path 3, a support roller 9 that supports the transport belt 8, a paper guide plate 10, and a platen roller 11 that faces the print head 2. ing. On the other hand, the pinch roller 1 pressed against the support roller 9 along the sheet transport path 3 is attached to the upper transport unit 7.
2, a paper guide plate 13, the print head 2, and a pressure contact plate 14 located near a print portion of the print head 2.

Here, the print head 2 and the pressure plate 14 are integrated as an upper transport unit 7a which is a part of the upper transport unit 7. As shown in FIGS. 1 and 4, the upper transport unit 7a includes the print head 2, the press-contact plate 14, and a support frame 15 that supports them. The support frame 15 is attached to a fulcrum shaft 17 supported by a fixed frame 16 so as to be rotatable and vertically movable.

The fixed frame 16 is formed substantially in the shape of an L-shape. As shown in FIG. 2, the front end of the long side faces the front side of the slide frame 5 and the short side is the back side of the slide frame 5. It is attached to a side plate 5 a of the slide frame 5 located on one side of the paper transport path 3. Then, a tip of a short side orthogonal to the paper transport path 3 in a form protruding from the side plate 5a is positioned outside the other side of the paper transport path 3, and the fulcrum shaft 17 is attached to the distal end. It is mounted with its axis centered vertically .

Next, the support frame 15 is also substantially L-shaped, and is disposed along the inside of the fixed frame 16. The tip of the short side is the fulcrum shaft 17.
The upper end of the long side is attached to a hook 18 provided at the upper end of the long side of the fixed frame 16 so as to be vertically movable and detachable. The support frame 15 is urged upward by a spring 19 passing through the fulcrum shaft 17, and is further connected to a rotating cam (not shown), which is driven by the cam to move up and down. I have. The print head 2 and the pressure plate 14 are mounted inside the support frame 15.

In such a configuration, the processing apparatus conveys the sheet fed to the sheet feeding unit 1 by rotating the conveying belt 8 and prints the sheet with the print head 2. Then, the sheet is conveyed by a reversing portion which is bent substantially in a U-shape, and the sheet is conveyed toward a stacker (not shown). The print head 2 and the pressure contact plate 14 are positioned at an ascending position separated from the paper transport path 3 during non-printing, and are lowered during printing by driving the support frame 15 to which these are attached by the rotating cam. It is positioned at a position along the sheet transport path 3.

Here, when paper is jammed in the vicinity of the print head 2, in this embodiment, first, the slide frame 5
Is pulled out of the main body case 4 to expose the internal mechanism. Then, the engagement of the hooks 18 connecting the support frame 15 and the fixed frame 16 is released, and the support frame 15 is rotated, whereby the upper transport comprising the support frame 15, the print head 2, and the press-contact plate 14 is performed. Unit 7a
Can be moved from above the paper transport path 3 to open the paper transport path 3 and the jammed paper can be removed. Here, since the fulcrum shaft 17 of the support frame 15 is provided outside the paper transport path 3, the upper transport unit 7a can be largely moved outside the paper transport path 3 as shown in FIG. Therefore, the jammed paper can be easily removed. The fulcrum shaft 17 has lead axis
Since the straight direction, the upper transfer unit 7a is rotated in a horizontal direction. Therefore, when the upper transport unit 7a is rotated, the upper transport unit 7a does not vigorously rotate due to its own weight, and it is possible to prevent the upper transport unit 7a from violently colliding with another portion and damage the apparatus.

When the jammed sheet is removed, the upper transport unit 7a is rotated to engage the tip of the support frame 15 with the hook 18 and fix it. Thus, the upper transport unit 7a is set on the paper transport path 3 again. Next, the slide frame 5 is pushed into the main body case 4 to house the mechanism and return to the original use state. At this time, if the user forgets to set the upper transport unit 7a on the paper transport path 3 and moves the slide frame 5 in the direction in which the slide frame 5 is stored in the main body case 4, the open upper transport unit 7a hits the main body case 4. However, the upper transport unit 7a is attached to the slide frame 5 with the fulcrum shaft 17 located on the back side and rotates in the horizontal direction as described above, and furthermore, the slide frame 5 moves in the horizontal direction. The upper transport unit 7a hitting the main body case 4 rotates in the direction set on the paper transport path 3 by the impact. For this reason, the impact is reduced, and damage to the device can be prevented.

[0014]

As described above, the present invention relates to a paper transport apparatus in which a slide frame to which a transport unit is attached is attached to a housing so as to be able to be pulled out in a horizontal direction, wherein the transport unit comprises a lower transport unit and an upper transport unit. The lower transport unit and the upper transport unit are opposed to each other to form a paper transport path therebetween, a fixed frame is attached to the slide frame, and one of the lower transport unit and the upper transport unit is formed. horizontal pull-out direction front by a supporting shaft one is provided on the inner side of the Rutotomoni pull-out direction is provided toward the vertical direction to the fixed frame support frame located at a position deviated to the sheet conveying path attached since it mounted to pivot from side to support either the lower transport unit or upper transport unit The support frame can be largely rotated to the outside of the paper transport path, so that the paper jammed in the paper transport path can be easily removed, and the support frame rotates in the horizontal direction. When the supporting frame is rotated, the supporting frame does not rotate vigorously due to its own weight, so that it is possible to prevent the supporting frame from violently colliding with other parts and damage the apparatus, and further, in a state where the paper transport path is opened. Even if the support frame is moved in the direction of being stored in the housing and the support frame that is left open is accidentally bumped against the housing, the support frame is rotated by the impact that hits the housing, so the impact is relaxed. And damage to the device can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a transport unit according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a slide frame is pulled out from a main body case.

FIG. 3 is a vertical cross-sectional side view showing a paper transport path near a printing unit.

FIG. 4 is an exploded perspective view showing a fixed frame and a transport unit in an exploded manner.

FIG. 5 is a top view illustrating a state in which a sheet conveying path is opened by rotating a sheet conveying unit.

[Explanation of symbols]

 3 paper transport path 4 housing 6, 7, 7a transport unit 17 fulcrum axis

──────────────────────────────────────────────────の Continuing on the front page (72) Mamoru Tago, Inventor Mamoru Tani, Ogata-machi, Takata-gun, Shizuoka Prefecture Tokyo Electric Co., Ltd. Within the Ohito Plant (72) Inventor Tsugio Narushima 570, Ohito, Oni-cho, Taga-gun, Shizuoka Prefecture Inside the Ohito Plant, Tokyo Electric Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) B65H 5/06 B65H 5 / 36

Claims (1)

(57) [Claims] In a paper transport device in which a slide frame to which a transport unit is attached is attached to a housing so as to be able to be pulled out in a horizontal direction, the transport unit is formed by a lower transport unit and an upper transport unit, and these lower transport units are provided. A unit and an upper transport unit are opposed to each other to form a paper transport path therebetween, a fixed frame is attached to the slide frame, and a support frame to which one of the lower transport unit and the upper transport unit is attached. Rutotomoni drawer side provided toward the vertical direction to the stationary frame located at a position deviated to the sheet conveying path
Horizontally with the support shaft provided on the back side of the drawing direction
A paper transport device mounted to rotate from the side .