JPS6352584B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding device in, for example, a typewriter.

For example, in a typewriter, etc., a sewing machine rotatably supports a paper feeding sprocket having multiple pins on both sides, has a hole that engages with the pins, and is used to continuously fold paper into a fan shape in the longitudinal direction. It has become popular to print on so-called continuous slip paper, which is provided with holes, and is set on the sprocket. However, in recent years, there has been a demand for a paper feeding device that can cut the paper at the perforations after printing.

The present invention has been made in view of the above circumstances, and its object is to provide a typewriter etc. that can reliably cut the continuous slip paper at the perforations and has excellent operability when setting the paper. The present invention aims to provide a paper feeding device for use in the industry.

The present invention will be explained below based on an embodiment shown in FIGS. 1 to 3. In the figure, 1 is a rectangular printing stand, and this printing stand 1 has paper 2 located below.
A guide member 3 is fixed to guide the printing table 1, and a plurality of pins 4a, 4' are provided on the outer periphery of the rear of the printing table 1.
A pair of sprockets 4 and 4' are provided with projecting sprockets 4 and 4'. On the other hand, paper feed holes 2a are formed at regular intervals on both sides of the paper 2, and the paper 2 is fed toward the printing table 1 by engaging the paper feed holes 2a with pins 4a.

Further, a pair of holding members 5 and 5' are fixed at a distance from each other on the upper part of the printing table 1, and a feed roller 7 is rotatable on each of these holding members 5 and 5' via a bearing 6. installed on. The bearing 6 is formed in a so-called drum shape with parallel notches on the outer periphery, and is attached to the holding members 5, 5' with the flange portion 6a inside. Further, in the rear part of the holding members 5, 5', a long hole 8a drilled in the horizontal direction and a short hole 8b bored vertically downward are provided in the L.
A groove 8 which is connected in a letter shape is formed. Further, a presser roller 9 is provided on the front side of the feed roller 7.
are placed in contact with each other, and both ends of the presser roller 9 are connected to a pair of arms 11, which are rotatable via bearings 10.
11'. Further, a cutter 12 is disposed above the presser roller 9, and is fixed to the bent portions 11a, 11'a of the arms 11, 11'.By operating the cutter 12, the pair of arms 11, 11' are adapted to move integrally. That is, arm 11,1
A pin 13 is provided protrudingly on the inside of each 1', and can be fitted into the L-shaped groove 8 and slid thereon, and when a thick paper 2 is used, the flat part 6 of the drum-shaped bearing 6
arms 11, 1 so as to obtain a slight gap g between
Stoppers 11b and 11'b are integrally formed at 1'.

Further, the presser roller 9 has arms 11 and 11'.
A spring 15 is stretched between the pins 14, 14' protruding outward from the guide member 3 and the rear end of the guide member 3.
The feed roller 7 is configured to be pressed against the feed roller 7 by pressing the feed roller 7. At this time, the notched surfaces 11c and 11'c of the arms 11 and 11', which are cut out in a direction perpendicular to the stoppers 11b and 11'b, are in contact with the circular arc portion 6c of the drum-shaped bearing 6, and the presser roller 9 is positioned in the vertical direction. are becoming regulated. Further, gears 16 and 1 are provided at one end of the feed roller 7 and the presser roller 9.
7 are fitted and mesh with each other, and when the feed roller 7 is driven by a paper feed motor (not shown), the presser roller 9 rotates at the same circumferential speed as the feed roller 7. Also, the feed roller 7
And the circumferential speed of the presser roller 9 is the same as that of the sprocket 4.
The peripheral speed is set to be the same as, or slightly faster than, the circumferential speed of Note that 2b indicates perforations provided at regular intervals in the longitudinal direction of the paper 2, and 12a indicates the blade of the cutter 12.

Next, the operation of the present invention based on the above configuration will be explained. In FIG. 1, a paper 2 is set via a guide member 3 between a feed roller 7 and a presser roller 9 that are in contact with sprockets 4, 4', and is directed toward a printing table 1 for printing. and,
After printing the last line, the paper feed motor (not shown) is driven, and the perforation 2b is cut by the blade 1 of the cutter 12.
2a, the paper 2 can be cut at the perforation 2b, and at this time, the stoppers 11b, 11'b are engaged with the flat parts 6b, 6'b of the bearings 6, 6'. In addition, the presser roller 9 can be prevented from separating from the feed roller 7.

Also, when setting new paper 2,
As shown in the figure, first, by lifting the cutter 12 in the direction of arrow A, the stoppers 11b and 11' are removed.
When the pins 13 and 13' are pulled in the direction of arrow B after disengaging from the pins 13 and 13', they slide through the long holes 8a of the L-shaped groove 8 and fall into the short holes 8b. That is, arm 11,1
The notched surfaces 11c and 11'c of 1' are the circular arc portions 6 of the bearing 6.
c is in sliding contact with each other, and the feed roller 7 and presser roller 9 are held in a separated state.

Therefore, after setting the paper 2 on the sprocket 4, feed it toward the printing table 1, and when the leading edge of the paper 2 reaches the contact point between the feed roller 7 and the presser roller 9, push down the cutter 12 in the opposite direction of arrow A. . Then, the pins 13, 13' are disengaged from the short hole 8b of the groove 8, and slide into the long hole 8a under the tension of the spring 15 and are locked, so the presser roller 9 is integrated with the arm 11. The paper 2 can be moved to the feed roller 7 side, and the paper 2 can be pressed between the feed roller 7 and the presser roller 9.

Note that an embodiment of the present invention includes a pair of holding members 5,
An L-shaped groove 8 is formed in the rear part of the arm 5', and pins 14, 14' protruding from the arms 11, 11' are fitted into the groove 8 and slid. and a pair of holding members 2 as shown in FIG.
1, 21' are provided with pins 22, 22' protruding from the rear of the arms 23, 23'.
The same effect as described above can also be obtained by forming an L-shaped groove 24 into which the holder 2' is inserted and slid. That is, when setting a new sheet of paper 2, first, as shown in FIG.
are pins 22, 2 protruding from the holding members 21, 21'.
2' slides within the elongated hole 24a of the L-shaped groove 24 and is locked by the stoppers 23b, 23'b. Therefore, when the cutter 12 is lifted in the direction of arrow D, the pins 22, 22' fall into the short holes 24b and can be held under the tension of the spring 15. Next, after setting the paper 2, by pushing down the cutter 12 in the opposite direction of arrow D, the pins 22, 22' are inserted into the short holes 24b of the groove 24.
When the spring 15 is disengaged from the
The press roller 9 moves toward the feed roller 7 side together with the arms 23 and 23' together with the arms 23 and 23', and the paper 2 is placed between the feed roller 7 and the press roller 9. can be pressure-welded.

As explained above, according to the present invention, when cutting paper along perforations, there is no need to separate the feed roller and presser roller that hold the paper, and the paper can be easily set. It has excellent effects such as:

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a paper feeding device showing an embodiment of the present invention, Fig. 2 is a right side view of the same device, Fig. 3 is a right side view for explaining the operation of the same device, Figs. FIG. 5 shows another embodiment of the present invention, FIG. 4 is a right side view of the same device, and FIG. 5 is a right side view for explaining the operation of the same device. 1...Printing stand, 2...Paper, 4...Paper feeding sprocket, 7...Feed roller, 9...Press roller, 12...Cutter, 6...First bearing (drum-shaped bearing), 8 , 24... L-shaped groove, 5, 5', 2
1, 21'... Holding member, 10... Second bearing (bearing), 13, 22... Pin, 11b, 23b...
...stopper, 11,23...arm, 15...spring.

Claims (1)

[Claims] 1. A printing stand, a pair of feed rollers and a presser roller that are arranged on the paper ejection side along the longitudinal direction of the printing stand and that pinch and convey the paper, and a paper ejection side further along the longitudinal direction of the presser roller. and a cutter for cutting paper disposed on the printing table, which is fixed to both ends of the printing table, rotatably supports the shaft of the feed roller via a first bearing, and has an L cutter on the rising portion. A holding member having a letter-shaped groove is rotatably attached to the shaft of the presser roller via a second bearing, and the cutter is attached horizontally, and the L of the holding member is It is equipped with an arm having a pin that can slide in a groove, and a spring that is attached at one end to press the presser roller against the feed roller. The stopper locks on the drum-shaped bearing of the feed roller to prevent the presser roller from separating from the feed roller, and when the presser roller is to be separated from the feed roller, lift the arm and release the stopper. A paper feeding device characterized in that a pin of an arm is displaced through an L-shaped groove when pulled toward the user, thereby maintaining a gap between a presser roller and a feeding roller.