JPS621160Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feeding roller stopping device in a friction paper feeding device.

Conventionally, in a bottom-feeding friction paper feeding device, there is a first paper feeding roller on the drive side for feeding the paper, and a second paper feeding roller provided spaced apart on the rear side thereof.
Because the paper feed roller is constantly rotating, when you try to feed paper one by one manually instead of automatically, the paper set on the table may be held up by the feeding force of the second paper feed roller. As a result, manual paper feeding was extremely difficult.
Furthermore, since the second paper feed roller is constantly rotating as described above, it tends to slip against the paper placed on it, resulting in premature wear of the second paper feed roller.

In view of this, the present invention has a structure in which the intermediate roller that transmits rotation to the second paper feed roller can be easily brought into contact with and separated from the roller with a single touch, and when manually feeding paper, the rotation of the second paper feed roller is stopped and the intermediate roller is placed on the table. To provide a paper feed roller stop device in a friction paper feed device, which eliminates feeding of stacked paper, thereby facilitating manual feeding work, and at the same time prevents abrasion of a second paper feed roller due to slipping with the stacked paper. This was done for the purpose of

The present invention will be explained below with reference to embodiments shown in the drawings.

In FIG. 1, A is a paper feed block, and between the side walls of this paper feed block A, there is a first paper feed roller 1 driven by a motor, and a second paper feed roller 2 spaced apart from this to the rear. is mounted on a shaft, and an intermediate roller 3 is arranged between these paper feed rollers 1 and 2, and the driving force of the first paper feed roller 1 is applied to the second paper feed roller 2 through this intermediate roller 3 in the same direction. It is now transmitted as rotation.

On the other hand, an intermediate roller support arm 4 and a stopper arm 5 are provided on the outer surface of the paper feed block A.

The intermediate roller support arm 4 has a long hole 6 at its base end.
It is freely pivoted by a shaft 7 which is inserted through the elongated hole 6, and an intermediate roller 3 which is inserted into a large hole 8 formed through the side wall of the paper feed block A is located in the middle thereof. A shaft 9 is supported, and an operating section 10 is formed near the shaft 9.

The stopper arm 5 has an operating part 11 at the lower end, and an L-shaped control hole 12 is formed in the middle part, into which a pin 13 protruding from the tip of the intermediate roller support arm 4 is inserted. ing. A tension spring 15 is tensioned between this pin 13 and the shaft 14 of the stopper arm 5.
is located in the vertically straight portion 12a of the control hole 12, the tip of the intermediate roller support arm 4 is pulled upward by the action of the spring 15, and the circumferential surface of the intermediate roller 3 is It is pressed against the circumferential surfaces of paper rollers 1 and 2, and the rotation of the first paper feed roller 1 is caused by the rotation of the second paper feed roller 1.
When the pin 13 is in a position to be transmitted to the feed roller 2 and is located in the laterally bent and extending key-shaped portion 12b of the control hole 12, the upper edge of the key-shaped portion 12b causes the pin 13 to is pressed so that the intermediate roller 3 is separated from the first and second paper feed rollers 1 and 2.

Next, the operation of the above embodiment will be explained.

During automatic paper feeding, each part is in the state shown in FIGS. 1 and 2. That is, the pin 13 of the intermediate roller support arm 4 is located in the straight portion 12a of the control hole 12 of the stopper arm 5, and the pin 13 of the intermediate roller support arm 4
is pulled upward by the spring 15, and as a result, the intermediate roller 3 comes into pressure contact with the first and second paper feed rollers 1 and 2, and the rotation of the first paper feed roller 1 in the direction of the arrow passes through the intermediate roller 3 to the second paper feed roller. The rotation is transmitted to the paper roller 2 in the same direction, and the second paper feed roller 2 contacts the bottom surface of the leading edge of the paper placed on the table and moves the paper sheet by friction to the first paper feed roller 1 one by one.

To stop paper feeding, rotate (push down) the intermediate roller support arm 4 in the state shown in Figure 2 counterclockwise around the shaft 7, and the pin 1 at the tip
3 descends inside the control hole 12 of the stopper arm 5,
When reaching a position away from the straight portion 12a, the stopper arm 5 automatically moves clockwise around the shaft 14 due to the direction of action of the spring 15, and the pin 13 is fitted into the key-shaped portion 12b. Therefore, if you let go of your hand, the pin 13 will be pressed by the upper edge of the key-shaped portion 12b as shown in the third figure, and the intermediate roller 3 will be separated from the first and second paper feed rollers 1 and 2 and the ,
The state is maintained in such a state that transmission of rotation between the second paper feed rollers 1 and 2 is interrupted.

As a result, the rotation of the second paper feed roller 2 is stopped, and wear caused by slipping with the paper placed thereon and removal of the paper are prevented, making manual feeding work easier.

Next, to switch to automatic paper feeding again, rotate the stopper arm 5 counterclockwise in the figure from the state shown in the third figure, and the intermediate roller support arm 4
The pin 13 moves from the key-shaped portion 12b of the control hole 12 to the lower end of the straight portion 12a, and its restraint is released, so the intermediate roller support arm 4 is pulled upward by the tensile force of the spring 15, and the intermediate roller 3 is in pressure contact with the first and second paper feed rollers 1 and 2 as shown in FIG.
In the state shown in FIG. 2, the rotation of the first paper feed roller 1 is again transmitted to the second paper feed roller 2, and automatic paper feeding is performed.

As explained above, in the present invention, the second paper feed roller can be rotated and stopped simply by operating the intermediate roller support arm and the stopper arm, so switching operations during manual feeding can be easily performed.
This eliminates the inconvenience of paper being removed from the table when manually feeding paper, as was the case in the past, and the cumbersome work of manually inserting paper while holding the paper in place to prevent it from being taken out has been completely eliminated, greatly improving work efficiency. In addition, wear of the second paper feed roller due to slipping between the paper on the table and the second paper feed roller is also prevented, and the service life of the second paper feed roller can be significantly extended.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the paper feed roller stopping device according to the present invention, FIG. 2 is a side view of the same when the paper is automatically fed, and FIG. 3 is a side view of the same when the roller is stopped. DESCRIPTION OF SYMBOLS 1... First paper feed roller, 2... Second paper feed roller, 3... Intermediate roller, 4... Intermediate roller support arm, 5... Stopper arm, 12... Control hole,
13...pin, 15...spring.

Claims (1)

[Scope of utility model registration request] A second paper feed roller 2 is provided at a distance behind the first paper feed roller 1 which is rotationally driven.
In a bottom-feeding friction paper feeder having an intermediate roller 3 between paper feed rollers 1 and 2 that transmits the rotation of the first paper feed roller 1 to the second paper feed roller 2,
The shaft 9 of the intermediate roller 3 is pivotally supported at its base end.
an intermediate roller support arm 4 that supports the intermediate roller support arm 4; a swingable stopper arm 5 that intersects with the support arm 4 and whose base end is pivotally supported; and the intermediate roller support arm 4 that supports the intermediate roller support arm 4;
, a control hole 12 formed in the stopper arm 5 into which the pin 13 is fitted, and a control hole 12 formed in the stopper arm 5 into which the pin 13 is fitted; 1 and 2, and the control hole 12 is located above and below where the pin 13 is located when the intermediate roller 3 comes into pressure contact with the first and second paper feed rollers 1 and 2. It has a direction straight portion 12a and a horizontal direction key-shaped portion 12b into which the pin 13 fits and restrains the intermediate roller 3 when it is separated from the first and second paper feed rollers 1 and 2. In a friction paper feeding device, the stopper arm 5 has a swinging habit due to its own weight in a direction in which the pin 13 fits into the key-shaped portion 12b of the control hole 12 when the free end of the intermediate roller support arm 4 is pulled down. Paper feed roller stop device.