JPH0114586Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a paper feeding device used in newspaper advertisement collating devices, printing machines, facsimile machines, etc.

In a newspaper advertisement collating device that gathers several types of flyers one by one into one set and inserts them into a newspaper, a device was proposed in Utility Model Application No. 52-92811 that stacked the flyers on a feeding table and sent them out one by one. There is. However, since this device uses a spring to adjust the pressure of the auxiliary roller against the flyer, the above pressure varies widely depending on the swinging position of the arm that supports the auxiliary roller, and the leaflet on the supply table As the number of sheets decreases, the pressure becomes insufficient and paper feeding becomes uncertain, so there is a drawback that it is necessary to constantly monitor the paper feeding state, interrupt paper feeding, and readjust the spring. In addition, if the pressure on the auxiliary roller is increased by adjusting the spring, the arm will tilt downward and the auxiliary roller will approach the supply table, whereas if the pressure is decreased, the arm will tilt upward and the auxiliary roller will move closer to the supply table. It was not possible to adjust the pressure and the position of the auxiliary roller separately and independently. For this reason, if the above pressure is increased, it will get in the way of loading leaflets onto the feeding table, and if the above pressure is reduced, it will be impossible to bring the auxiliary roller close to the feeding table, and it will be difficult to load leaflets onto the feeding table. It was not possible to feed leaflets, etc. smoothly and reliably.

This idea was made in consideration of the above points, and the pressure of the auxiliary roller on the paper surface of leaflets, etc. does not change significantly depending on the swinging position of the arm, and the above pressure and the position of the auxiliary roller can be adjusted independently. The purpose of the present invention is to provide a paper feeding device that can reliably feed paper regardless of changes in the stacking thickness of leaflets, etc., changes in paper quality, size, etc.

An embodiment of this invention will be explained below with reference to FIGS. 1 to 3.

In the figure, 1 is the frame of the newspaper advertisement collating device, 2 is the supply stand attached to this frame, the horizontal plate 3 fixed to the frame 1, and the pin 4 attached to the frame 1.
It consists of an inclined plate 5 whose inclination angle can be changed by rotating it around the . 6 is a bracket whose upper end is fixed to the frame 1, and 7 is a drive shaft rotatably supported by this bracket, which is intermittently connected by a clutch to a rotating shaft driven by a drive device (not shown), and is intermittently driven in the direction of arrow X. It is something that will be done. Reference numeral 10 denotes a paper feed roller, which has a rubber tire 10a having serrated irregularities fixed to its outer circumference, and a one-way needle bearing 1 on the drive shaft 7.
1, it is mounted rotatably only in one direction (arrow X direction). The paper feed roller 10 is disposed near the front edge of the supply table 2 and approximately at the center of the supply table 2 in the width direction. Reference numeral 12 denotes a known piece for preventing double feeding, which is disposed facing the paper feed roller. 13 is a pulley fixed to the drive shaft 7 with a key. Reference numeral 14 denotes an arm whose one end is fitted onto the drive shaft so as to be swingable around the drive shaft 7, and whose planar shape is approximately U-shaped. Reference numeral 15 denotes a brake device built into the arm 14, which includes a brake shoe 17 inserted movably in the longitudinal direction into a hole 16 bored in the arm 14, a compression spring 18 for pressing the brake shoe, and Fixed cover 14
A compression spring 18 is screwed into a seat 14b fixed to a.
and a torque adjustment knob 19 for adjusting the braking torque by changing the compression length of the brake. The brake shoe 17 has a short cylindrical shape, and one end surface thereof is connected to the drive shaft 7.
is in contact with the outer periphery of the On the other hand, 20 is arm 14
A support shaft is rotatably attached to the other end, and an auxiliary roller 21 is attached to this support shaft by a one-way needle bearing 22 so as to be rotatable in only one direction (the direction of arrow X). The auxiliary roller 21 has a structure similar to that of the paper feed roller 10, and has rubber tires 2 on the outer periphery.
1a is fixed. Reference numeral 23 denotes a driven pulley fixed to the support shaft 20 with a key, and a belt 24 is wound around this driven pulley and the drive pulley 13. 25
and 26 are levers for switching the arm position, and the bent small piece 27 at the tip of the shorter lever 25 engages with a small hole 28 drilled in the lever 26, and both levers are overlapped with each other in the cover 14a of the arm. It is pivotally supported by a pivot shaft 29 protruding from the pivot shaft 29.
Due to the elastic force of the spring 30 attached to the cover 14
It is pressed against a. The pin 31 fixed to the other end of the lever 25 is connected to a hole 3 formed in the lever 26.
2, the tip of which penetrates through the cover 14a.
The holes 33 and 34 are selectively engaged with each other. Reference numeral 35 denotes a knob for operating the tilt position switching operation of the levers 25 and 26, and is integrated with the pin 31. 36
is a return spring made of a torsion coil spring, which is fitted onto the drive shaft 7 via a bush 7a, one end of which is fixed to the bracket 6, and the other end of which is fixed to the lever 26.
It fits into a hole 38 made in a bent piece 37 at the tip of the holder. Further, numerals 39 and 39 are feed rollers that rotate all the time.

Next, the operation of the paper feeding device 53 having the above configuration will be explained.

For feeding leaflets of normal paper quality and size,
As shown in the figure, the pin 31 is engaged with the hole 33, and the bent piece 37 of the lever 26, which engages with the end of the return spring 36, is positioned downward. As a result, with the arm 14 tilted upward as shown, the weight of the arm 14 and the like and the return torque of the return spring 36 are balanced. Therefore, a large number of leaflets 40 are stacked on the supply table 2 to set the leaflets. At this time, the arm 14 is in the return position shown by the solid line in FIG. 1 by the return spring 36, and the auxiliary roller 21 is spaced upward from the supply table 2, so that it does not get in the way of setting the flyers and can be easily set. It can be done. Next, a clutch (not shown) is connected and the drive shaft 7 is rotated in the direction of arrow X for a predetermined period of time (for example, one second). As the drive shaft 7 rotates, the arm 14 is driven by the braking torque of the brake device 15 to overcome the torsional torque of the return spring 36, and rotates together with the drive shaft 7 in the direction of arrow X, and the auxiliary roller 21 is rotated. The top layer leaflet 40a is contacted.
On the other hand, the rotation of the drive shaft 7 is controlled by the drive pulley 13 and the belt 2.
4. Since the paper is transmitted to the support shaft 22 via the driven pulley 23, the feed roller 10 and the auxiliary roller 21 rotate at the same angular velocity, and the auxiliary roller 21 rubs the top layer of the flyer 40a due to contact with the flyer mentioned above. It is driven to send its leading end between the paper feed roller 10 and the frame piece 12. As a result, the flyer 40a is frictionally driven by the feed roller 10 and the feed roller 39
When the tip of the flyer 40a is caught between the feed rollers 39, 39, the clutch is released and the rotation of the drive shaft 7 is stopped. The arm 14 is driven by the torsional torque of the return spring 36 and
It returns to the return position shown by the solid line in the figure. Thereafter, the above operation is repeated to feed leaflets one by one from the upper layer to the feed roller 39.

Next, in the above device, in order to adjust the pressure (pressure force) of the auxiliary roller 21 against the flyer depending on the paper quality of the flyer, etc., turn the torque adjustment knob 19 to adjust the compression spring force of the spring 18.
What is necessary is to change the pressing force F of the brake shoe 17 on the drive shaft 7 and change the braking torque T between the arm 14 and the drive shaft 7. This braking torque T causes the number of flyers to decrease and the auxiliary roller 21
The angle of inclination of the arm 14 while in contact with the top surface of the arm 14 remains unchanged even if the angle of inclination changes. Auxiliary roller 21
The pressure P on the leaflet is determined mainly by the braking torque T, the restoring (twisting) torque by the return spring 36, and the rotational moment around the rotating shaft 7 due to the weight of the arm 14 and the like. Therefore, by selecting the spring characteristics of the return spring 36, it is possible to easily maintain the pressure P at an almost constant value even if the inclination angle of the arm 14 changes. Furthermore, by adjusting the pressing force F of the brake shoe 17 on the drive shaft 7, the pressure P can be adjusted widely without changing the angle of inclination of the arm 14.

If the flyer is thick or made of heavy paper such as art paper, the pin 31 is engaged with the hole 34 and the tilted position of the lever 26 is changed as shown in FIG. switch to the upper position. This switching is performed by pulling the knob 35 and rotating the lever 25 around the pivot shaft 29 while tilting the lever 25 as shown by the chain line in FIG. Then, the weight of the arm 14 and the like and the return torque of the return spring 36 are balanced at a position where the arm 14 is almost horizontal without a leaflet. Therefore, when the flyer 40 is set on the paper feed table 2, the flyer 40 is always pressed by the auxiliary roller 21, and this pressing force is the torque of the return spring 36 plus the weight of the arm 14, etc., so the drive shaft When the leaflet 7 rotates, these pressing forces are added to the pressure caused by the braking torque T of the brake device 15, and a strong frictional driving force acts on the flyer 40, ensuring reliable sheet feeding. Note that the pressure of the auxiliary roller 21 can be adjusted by adjusting the braking torque of the brake device 15 as in the case of FIG. It can also be set at a position close to the supply stand 2, allowing large and thin leaflets etc. to be fed smoothly and reliably.

This invention is not limited to the above embodiment; for example, instead of the lever 26 being pivotally attached to the side of the arm 14 via the cover 14a,
4 may be modified so that it is pivoted directly to the side of the arm. Further, the return spring 36 may be directly fitted onto the drive shaft 7. Further, the tilt position switching mechanism of the lever 26 may have a configuration other than the above, such as a pin 31 slidably attached to the lever 26 via a spring and biased in the direction of fitting into the hole 33. In addition to stepwise switching of three or more tilt positions, the tilt position may also be switched steplessly. Furthermore, this invention can be applied not only to the paper feed device for the newspaper advertisement collating device described above, but also to paper feed devices for copying machines, printing machines, etc.

As explained above, according to this invention, the pressure on the auxiliary roller against the flyer is adjusted by adjusting the braking torque between the drive shaft and the arm, so that the change in pressure due to the tilted position of the arm can be adjusted. It can be kept small and can reliably feed paper regardless of changes in the laminated thickness of leaflets, etc. In addition, one end of the return spring is fitted into a hole at the tip of a lever pivotally attached to the side of the arm, and the arm position is adjusted by switching the tilt position of this lever, so that the pressure of the auxiliary roller and The position of the auxiliary roller can be adjusted independently, and the return position of the auxiliary roller is moved closer to the supply table, and the spring force of the return spring presses the auxiliary roller against leaflets, etc. to obtain a strong frictional driving force. This provides a paper feeding device with a wide range of applications that can reliably feed leaflets of various sizes and paper types.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIGS. 1 and 2 are side views of the paper feeding device, and FIG. 3 is a partially cutaway plan view (viewed along arrow A-A in FIG. 2). 2... Supply stand, 6... Bracket, 7... Drive shaft, 10... Paper feed roller, 11... One-way needle bearing, 13... Drive pulley, 14...
... Arm, 15 ... Brake device, 17 ... Brake shoe, 19 ... Torque adjustment knob, 20 ...
Support shaft, 21... Auxiliary roller, 22... One-way needle bearing, 23... Driven pulley, 24
...Belt, 26...Lever, 29...Pivot shaft,
36...return spring, 38...hole.

Claims (1)

[Scope of utility model registration request] A feed roller is placed near the front edge of the feed table and is attached to a drive shaft that rotates intermittently so that it can rotate in only one direction, and one end is fitted to the drive shaft so that it can swing freely around the drive shaft. an auxiliary roller rotatably attached to the other end of the arm, a transmission device that transmits the rotation of the drive shaft to the auxiliary roller, and between the arm and the drive shaft. a brake that generates braking torque; a torque adjustment mechanism that adjusts the braking torque; a lever that is pivoted to the side of the arm so as to be able to change its tilt position; and a lever that is fitted onto the drive shaft and has one end supporting the drive shaft. and a return spring consisting of a torsion coil spring fixed to a bracket for use with the lever, the other end of which is fitted into a hole at the tip of the lever.