JPH0348116Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a media storage mechanism that stacks and stores sheet-like media discharged from the main body of a printer, copying machine, or the like.

Background of the Technology When stacking and stocking sheet media ejected from the main body of a printer, copier, etc., it is possible to reliably pull the ejected media to the stock position, even as the number of stacked media increases. It is necessary that the pull-in be performed under the same conditions.

Prior Art and Problems The conventional media storage mechanism that performs such media storage (Japanese Patent Application No.
14066 (Special Publication No. 64-298)) is shown in Figure 1. The sheet medium 100 discharged from the main body 1 of the apparatus by the discharge roller 2 passes between the upper guide plate 3 and the lower guide plate 4 as shown by the dotted arrow line, and is transported downward by the auxiliary roller 5. . In this case, the small medium falls along the lower guide plate 4 as shown by the dotted arrow line, and its tip ends at the pull-in roller 4.
When it reaches this point, the paper is pulled in by the drawing roller 6 until it stops on the bottom plate 8 of the paper holder 7, and is stored.
A portion of the pull-in roller 6 protrudes from a slit formed in the lower guide plate 4 toward the paper holder 7, and the paper holder 7 is for stacking and storing the ejected media, and the paper holder 7 is used to stack and store ejected media. ’ direction so as to be movable.
It is urged in the direction of arrow A by a spring 9 and comes into pressure contact with the pull-in roller 6 . That is, the paper holder 7 constitutes a storage section for media, and is movable so that the distance from the lower guide plate 4 increases or decreases, and is biased by the spring 9 in the direction to decrease the distance. has been done. The above-mentioned drawing of the medium by the drawing roller 6 is performed by moving the medium between the drawing roller 6 and the paper holder 7.
This is done by squeezing and compressing. Similarly, the large medium is drawn in by the pull-in roller 6 until the leading end is locked on the bottom plate 8, and then the rear end receives the transporting force of the auxiliary roller 5, thereby moving the medium into the positions A and B indicated by dotted lines in the figure. As time passes, it swells, reverses, and becomes stocked.
As the number of media in stock increases, the paper holder 7 moves in the direction of arrow A' as shown by the chain line.
A stock mechanism with such a configuration and action is
As shown in FIG. 2, a stacker housing 11 is attached to the device body 1 via a hinge 10 so as to be openable and closable.
It is housed in a 100-m² compartment, making inspection and maintenance easy. Note that the medium can also be drawn in by the belt 13, which is passed around the drawing roller 6 and the roller 12.

However, when drawing media of various sizes and storing them on the paper tray 7, the second and subsequent media are drawn in contact with the media that was drawn in first, but in this case, due to the unevenness of the media surface. Due to the increase in frictional resistance at the drawing portion, the medium 100 may tilt as shown in FIG. 3a or jam as shown in FIG. 3b. This becomes noticeable when the temperature is high, the humidity is high, or when the medium becomes stiff.

In order to solve this problem, a method has been conventionally adopted in which the paper holder 7 is directly connected to a link mechanism or a cam mechanism and swung to improve the storage performance of the media, but this method has a complicated structure and is If you want to move the paper holder as the stacking of media progresses, it is necessary to provide a drive source etc. on the paper holder side so that the link mechanism etc. work constantly, which takes up a lot of space and increases costs. Put it away.

For this reason, for example, as proposed in Japanese Utility Model Publication No. 47-12803, in order to store a computer input card in an upright position, a method is proposed in which the card is pulled in between a stacker weight and a pull-in roller. Some devices have a structure in which the retracting roller is provided with a protrusion that periodically presses and moves the stacker weight.

However, if such a stacker weight is applied to the media storage mechanism shown in Figure 1, the device configuration will become extremely large, and in the case of relatively weak paper ejected from a copying machine, etc. If the gap is too large between the tray and the drawing roller, there is a problem in that sufficient drawing force is not applied to the paper and the paper cannot be stocked properly.

Purpose of the Invention The present invention is intended to solve the above-mentioned problems, and it is an object of the present invention to provide a medium storage mechanism with a simple and compact structure that can always correctly and continuously store media.

Composition of the Invention The present invention includes a substantially dogleg-shaped lower guide plate for guiding the sheet-shaped storage medium ejected from a host device downward; a stop member that engages with the leading end of a sheet-shaped recording medium to stop conveyance of the medium; and a stop member that faces the lower guide plate and is movable so as to increase or decrease the distance between the stop member and the lower guide plate; a biasing means for constantly biasing the storage section so that a distance between the storage section in which the discharged medium is inverted and stored and the lower guide plate; and a lower part of the lower guide plate. and a medium drawing means provided above the stop member to sandwich the ejected medium between the medium and the storage section and apply a drawing force to the medium in the direction of the stop member. In the medium storage mechanism, the medium retracting means includes a pressing means for periodically pressing the surface of the stored medium, and the storage section is configured to act on the urging means by the pressing force of the pressing means. It is configured such that it is moved so that the distance increases.

Embodiments of the invention Hereinafter, embodiments of the invention will be described with reference to FIGS. 4 to 6.

FIG. 4 is a side view of the medium storage mechanism according to the present invention, and in the figure, 21 is a retracting means. It should be noted that members having the same configuration as the conventional one are represented by the same symbols as the conventional one.

The retracting means 21 includes a roller 22 that is driven by a drive source (not shown) and rotates counterclockwise in the figure;
Consisting of a roller 23, a belt 24 wrapped around these rollers, and a roller 25 having the same diameter as the roller 23, which is provided coaxially with the roller 23, each roller is provided along the lower part of the lower guide plate 4. A part of the guide plate 4 protrudes from the lower guide plate 4. A protrusion (pressing member) 26 is provided on the outer periphery of the roller 25 over approximately half the circumference.

The medium 100 discharged from the main body of the apparatus falls along the lower guide plate 4 and the leading end is drawn in by the drawing means 21, but in this case, since the roller 25 is provided with a protrusion 26, the paper holder 7 is pressed by the protrusion 26 and retreated in the direction of arrow A' against the biasing force of the spring 9, and the medium 10
0 is drawn between the lower guide plate 4 and the paper holder 7 without receiving any resistance. When the protrusion 26 passes over the medium surface, the paper holder 7 moves in the direction of arrow A' due to the biasing force of the spring 9 and returns to its original position. continues even after it is locked to the bottom plate 8, so the medium 1
00 is aligned to the correct attitude. In addition, medium 10
Even when the media are successively drawn in and stacked on the paper holder 7 as shown in FIG. 4, the surfaces of the stacked media are pressed by the protrusions 26, so the media can be pulled in smoothly in the same state as the beginning. It will be held on. That is, it is possible to solve the conventional problem caused by irregularities on the surface of the medium and to always correctly and continuously stock the medium.

Other examples of retraction means are shown in FIGS. 5 and 6.

In the case of FIG. 5, a protrusion (pressing member) 31 is attached to the belt 24, and the paper holder can be swung by the protrusion 31 to achieve the same effect as the previous example.

In the case of FIG. 6, a cantilever arm-shaped protrusion (pressing member) 41 is attached to the shaft of the roller 23, and the tip of the protrusion 41 protrudes from the outer periphery of the roller 23 to receive the paper. Rock the table.

Effects of the invention According to the invention, the medium drawing means includes a pressing means that periodically presses the surface of the stored medium, and the storage section resists the urging means by the pressing force of the pressing means. Since the medium is moved so that the distance increases, the leading end of the discharged medium is easily and reliably drawn between the storage section and the medium drawing means.

Therefore, even thin media can be stocked in the correct posture.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional media stock mechanism, Figure 2 is a perspective view showing the installation procedure, Figures 3a and b are illustrations of occurrence of the same problem, and Figures 4 to 6 are related to the present invention. This shows an example of a media storage mechanism.
FIG. 4 is a side view of the medium stock mechanism, and FIGS. 5 and 6 are side views showing other examples of the pressing member. In the figure, 1 is the main body of the device, 3 and 4 are guide plates,
7 is a paper holder, 8 is a bottom plate, 9 is a spring (biasing means), 21 is a drawing means, 22, 23, 25 are rollers, 24 is a belt, 26, 31, 41 are protrusions (pressing members), 100 is a sheet-like medium.

Claims (1)

[Scope of claims for utility model registration] Sheet-like storage medium 1 ejected from a host device
a substantially doglegged lower guide plate 4 for guiding the 00 downward; and a lower guide plate 4 disposed below the lower guide plate to engage with the leading end of the ejected sheet-like storage medium to a stop member 8 that stops conveyance; and a storage section 7 that faces the lower guide plate and is movably provided so that the distance between the lower guide plate and the lower guide plate increases or decreases, and in which the discharged medium is inverted and stored. , biasing means 9 for constantly biasing the storage section so that the distance from the lower guide plate is reduced; provided at a lower part of the lower guide plate and above the stop member; A medium stocking mechanism comprising: a medium drawing means 21 which sandwiches the ejected medium between the storage part and applies a drawing force to the medium in the direction of the stop member, the medium drawing mechanism comprising: The means 21 includes pressing means 26, 31, 41 that periodically presses the surface of the stored medium.
A medium storage mechanism, characterized in that the storage section is moved by the pressing force of the pressing means against the urging means so that the distance increases.