JPS6222894B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll paper holder attachment/detachment device used in copying machines, printers, etc.

The holder for mounting roll paper has a rotating shaft integrated with a flange in order to facilitate the mounting of paper onto the holder.After the paper roll is mounted on this shaft, it is stored in the roll paper storage section of the machine. is common.

And, the conventional roll paper storage section is usually
One end of the holder rotation shaft is engaged with a fixed guide of the paper holder rotation shaft fixed to the frame of the machine, and the other end is engaged with a sliding guide that can slide along a cantilever shaft also fixed to the frame or the like. By doing so, the roll paper holder can be attached and detached.

Further, the sliding guide is configured so that it can be locked in a temporary mounting position of the paper holder rotating shaft by a suitable latch mechanism in order to facilitate attachment and detachment of the roll paper holder.

Therefore, after the engagement of the rotating shaft of the paper holder with both guides is completed, it is necessary to manually release the lock and move and fix the paper holder to the normal mounting position.

However, in the case of the roll paper holder attaching/detaching device having the above configuration, if one forgets to release and fix the latch of the sliding guide, the paper holder remains in the temporarily attached state, and the paper cannot be fed out normally. There was a defect that jam or skew occurred.

The present invention has been made in order to eliminate the above-mentioned defects in the attachment/detachment mechanism of a roll paper holder. It is an object of the present invention to provide a roll paper holder mounting device characterized in that the roll paper holder is always fixed at a normal mounting position by interlocking with the closing operation of a door.

Hereinafter, the present invention will be explained in detail based on drawings showing examples.

FIG. 1 is an exploded view showing the configuration of the most common roll paper holder. After a paper roll 3 is inserted into a rotating shaft 2 having a flange 1 fixed to one end thereof, a removable flange 4 is fitted to the other end of the rotating shaft 2 and integrated.

As described above, the integrated roll paper holder is attached to the paper storage section of the machine, and the recording paper is sequentially taken out and used.

Note that 5 is a rotation prevention pin that fixes the rotating shaft 2 and the paper roll 3. As a result, the paper roll 3 has the rotating shaft 2, the flange 1,
It rotates in unison with 4 and feeds out the paper.

FIG. 2 is a plan view of the roll paper storage section of the machine showing a state in which the roll paper holder with the paper roll 3 mounted thereon is temporarily attached to the roll paper holder attaching/detaching device according to the present invention.

A bearing block 9 provided with a fixed guide 8 that engages one end of the paper holder rotating shaft 2 is fixed to one frame or side wall 6 of the roll paper storage section.

Further, a bearing block 12 is fixed to the other frame or side wall 7 so that the sliding guide 10 and a shaft 11 integrated therewith can slide along the shaft 11 and rotate smoothly.

Further, a coil spring 13 is disposed between the sliding guide 10 and the side wall 7 to press and hold the paper holder between the guides 8 and 10 and fix its rotational position. ing.

As is clear from the figure, the sliding guide 10 is a circular plate with a step 14 on its outer periphery, and has a deep hole 15 in its center that engages with one end of the paper holder rotating shaft 2. .

A knob 16 is provided at the other end of the shaft 11 that is integral with the sliding guide 10.
This makes it easy to move the paper holder to the paper holder attachment/detachment position.

Furthermore, a latch plate 17 for locking the sliding guide 10 is provided near the sliding guide 10.
It is attached to the side wall 7 via its rotating shaft 18. On the other hand, the plate 17 is urged by a suitable spring 19 in a direction to lock the sliding guide 10.

Further, a roller 20 is provided at one end of the plate 17.
The swing arm 22 supporting the top plate of the opening/closing door 21 covering the paper storage section is configured so that the roller 20 engages with the swing arm 22. Note that 23 is a pin that prevents excessive rotation of the plate 17.

The roll paper holder attaching/detaching device of the present invention having the above configuration operates as follows.

First, open the door 21 of the paper storage section and pull the knob 16 provided on the shaft 11 of the sliding guide 10 (pull it to the right in FIG. 2).
The sliding guide 10 engages the latch plate 17 at its outer stepped portion 14.

As a result, the sliding guide 10 is locked in the position shown in FIG. 2, that is, in the paper holder attachment/detachment device. In this state, both ends of the rotating shaft 2 of the roll paper holder are engaged with the fixed guide 8 and the sliding guide 10 to temporarily attach the roll paper holder.

FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 in this state. As is clear from FIG. 3, if the opening/closing door 21 of the paper storage section is closed,
The swing arm 22 supporting this
However, the roller 20 provided on the latch plate 17
is pressed against the spring 19.

As a result, the latch plate 17 is rotated counterclockwise in FIG. 3, and the engagement between the latch plate 17 and the sliding guide 10 is released. Therefore, the sliding guide 10 is pushed forward by the spring 13 - that is, automatically moves to the normal mounting position of the paper holder.

Since the present invention is constructed and operates as described above, it is possible to reliably prevent jams or skews caused by falling of the roll paper holder or movement on the rotating shaft by adding an extremely simple mechanism. becomes possible. Therefore, copying or printing failures due to operator errors can be completely prevented.

[Brief explanation of the drawing]

Fig. 1 is an exploded view showing the configuration of a general roll paper holder, Fig. 2 is a plan view showing an embodiment of the roll paper holder attaching/detaching device of the present invention, and Fig. 3 shows the latch release mechanism of the sliding guide. A-A in Figure 2 shown
FIG. 2... Roll paper holder rotating shaft, 8... Fixed guide, 10... Sliding guide, 11... Shaft, 13
... Spring, 17 ... Latch plate, 21
...Opening/closing door.

Claims (1)

[Claims] 1 The paper holder rotates by sliding along a shaft supported by a fixed guide provided on a fixed member of the roll paper storage section and another fixed member of the storage section in order to engage with one end of the roll paper holder rotation shaft. A sliding guide that engages with the other end of the shaft, and a latch mechanism that fixes the sliding guide at the paper holder attachment/detachment position, and after temporarily attaching both ends of the paper holder rotating shaft to the guides, the latch is In the roll paper holder attachment/detachment device configured to be released and move the sliding guide from the paper holder attachment/detachment position to a regular paper holder attachment position, a fixing member fixing the sliding guide and one end of the shaft on which the sliding guide slides. A spring for biasing the sliding guide towards the proper paper holder mounting position is provided between the paper holder and the paper holder, and the release of the latch mechanism is linked to the closing of the opening/closing door covering the roll paper storage section. . A roll paper holder attachment/detachment device, characterized in that the sliding guide is automatically moved from the paper holder attachment/detachment position to a normal attachment/detachment position.