JPS6346433Y2 - - Google Patents

Description

[Detailed explanation of the idea] Newspapers delivered to each home contain advertising leaflets that differ from region to region, and during mid-year, year-end, school entrance seasons, etc. It's in there. Especially in recent years, this number has been increasing more and more, and it is not uncommon for the number to exceed 10 even outside of specific periods.

Advertising flyers vary in paper size, thickness, quality, etc., as well as printing methods and ink quality, and they come in single leaf, bifold, and quarterfold, etc. The paper feeding device for printing is considerably more difficult than the one used for bookbinding in the past, and in particular, customers who order leaflets request that the paper be delivered within a short time after ordering. Even if the ink is not sufficiently dry, collation or paper feeding will be required. In addition, when a plate that can be printed on two sheets is made and printed, which is called tying, and the crease is cut after folding, it is difficult to separate the sheets into individual sheets, similar to the case where the printing ink is insufficiently dried. In addition, there are rare flyers that tear easily due to paper quality and thickness, and this invention was devised to feed paper correctly even when the paper feeding conditions are poor.

Conventionally, as this type of device,
There is one shown in the publication. However, in this case, a fulcrum body 49 is provided slightly above the shaft 24 of the paper feed roller 5, and an adjusting screw rod 50 is loosely fitted to this fulcrum body 49, and two coil springs 56 are attached to the adjusting screw rod 50.
52 are mounted opposite each other to balance their forces at one point.

Therefore, if the coil springs 56, 52 pass a point where they are balanced, the balance will inevitably be lost, so when the auxiliary roller 6 rotates downward as the leaflet 2 decreases, its pressing force will be increased. This changes dramatically as it gradually weakens. Therefore,
As mentioned above, in particular, it is not possible to completely correctly feed paper in this type of automatic paper feeder, which has various poor paper feeding conditions.

The present invention is an improvement on these points, and even if the level of the paper layer changes as the paper is fed, the pressure applied by the auxiliary roller to it remains almost constant and does not change. The configuration is extremely simple, and paper can always be fed correctly under any paper feeding conditions.

This will be explained with reference to the diagram.

In FIG. 1 and FIG. 2, 1 is the frame;
2 is the rear frame, 3 is the motor, 4 is the collection belt, 5 is the drawer roller, 7 is the restraint roller, 1
0 is a pressing roller, 11 is a paper feed roller, 31
is a swinging arm 2 pivotally supported on the shaft of the paper feed roller 11.
Auxiliary rollers pivotally supported at the tip of 9, 16, 16...
...is a paper mounting table.

In FIGS. 3 to 5, a housing 13 provided below the paper feed roller 11 extends between the front and rear frames 1 and 2 and is fixed to the frames.

The transfer plate 14 on the upper surface of the casing 13 extends up to the holding roller 7 with its left end inclined upward.

The paper mounting table support shaft 15 provided on the upper right side of the housing 13 has a square cross section, and its cylindrical portions at both ends are connected to the front frame 1.
is inserted into the rear frame 2 and rotatably supported, and a paper mounting table 16 is fixed to this support shaft 15, and an adjustment arm 17 shown by a dotted line near the front frame 1 is attached to a bolt. 18, and an adjustment screw 19 at the lower end of the paper mounting table 1.
Adjust the inclination angle of 6.

A paper receiving plate 20 is supported on the upper surface of the paper mounting table 16 so as to be movable by a certain length.

The paper feed roller shaft 12 is supported by a ball bearing 21 lightly driven into the rear frame 2 and a ball bearing 21' lightly driven into a bracket 22 hanging down from the casing 13' one step above. Pulley 23 loosely fitted in
is the pulley 2 fixed to the pull-out roller shaft 6
4 and is constantly driven by a round belt 25.

When the electromagnetic clutch 26 is energized, the pulley 23 and the paper feed roller shaft 12 are connected as one body, and the paper feed roller 11 is also driven.

A ball bearing 2 is attached to the paper feed roller shaft 12.
A swing arm 29 is swingably supported via 8 and 28. Ball bearings 30, 30 are attached to the boss 29a at the tip, and the auxiliary roller shaft 32
, and an auxiliary roller 31 is mounted on it.

A round belt 35 is stretched between a pulley 33 fixed to the paper feed roller shaft 12 and a pulley 34 fixed to the auxiliary roller shaft 32, so that the paper feed roller 11 and the auxiliary roller 31 are interlocked. The outer peripheries of both rollers 11, 31 are made of toothed rubber and incorporate one-way clutches 37, 37'. 14'' is a window hole provided in the transfer plate 14 of the housing 13, through which the rubber restraining piece 39 is exposed.The inclined plate 42 supporting the restraining piece 39 supports the pin 41 by rotating the eccentric wheel 44. 43 is a restraining plate for the restraining piece 39. The adjusting screw 46 is used to adjust the paper feeding device at each stage during assembly so that the same conditions are met.

A pin 4 is attached to the boss 29a at the tip of the swing arm 29.
7, 47 are fixed, and a fluororesin brake wheel 48, which has a coefficient of dynamic friction equal to or larger than the coefficient of static friction, is fixed to the boss 34' of the pulley 34 of the auxiliary roller shaft 32, and its outer periphery is One end of a brake band 49 shaped like a leaf spring is attached to the pin 47. 52 is a pin with a horizontal hole to which the other end of the brake band 49 is attached. 5
Reference numeral 3 denotes an adjustment screw which is inserted through the horizontal hole pin 52 and other horizontal hole pins 51 via a coil spring 54. A brake adjustment piece 57 is rotatably attached to the right end 53' of the adjustment screw 53 by a pin 56, and when the end of the brake adjustment piece 57 is lowered, the brake is released, and when it is raised, the brake is applied more strongly. There is.

Reference numeral 59 denotes a support pin, which is fixed to the support plate 58 as shown in FIG. 4. The lower end of the lifting spring 61 is engaged with the support pin 59 as shown in FIG. It is supported by a spring hook 62 provided inside the housing 13'.

The left end of the spring hook 62 is fitted into a groove from below of a grooved roller 65 loosely fitted to the pin 64 provided on a U-shaped fulcrum body 63 fixed to the housing 13'. It is supported by an inclined plate 66.

The slope angle of the slope plate 66 is a gentle slope within the friction angle, and it can be pushed and pulled from the front frame 1 by a rod 67. When the rod 67 is pulled, the lifting spring 61 is strengthened and the auxiliary roller 31 is supplied. It is designed so that it can be lifted using the paper roller shaft 12 as a fulcrum.

As shown in FIG. 5, the stopper 68 attached to the bracket 22 fixed to the housing 13' one step above has its lower end 68' bent.
It is inserted into an engagement hole 29e provided in the main part of the swing arm 29 with a slight gap maintained. A long groove hole 68'' is provided in the upper part of the bracket 22, and a screw 69 is screwed through the long groove hole 68'' into a tap hole drilled in the main part 22' of the bracket 22, and a small coil spring 71 is inserted. It is supported with slight frictional resistance. The above-mentioned lifting spring 61 lifts the auxiliary roller 31 supported on the swing arm 29 from the upper surface of the flyer 38 placed on the paper stacking table 16 at a distance at which the lower end of the stopper 68 is bent 68'. and the engagement hole 29e of the swing arm 29. In this embodiment, the leaflet 38 is always lifted by about 5 degrees regardless of the displacement of the upper surface of the leaflet 38.

Note that when the auxiliary roller 31 is lifted to the uppermost position, the lower end of the long slot 68'' of the stopper 68 is brought into contact with the screw 69 before the auxiliary roller 31 comes into contact with the housing 13'. The rising point of the roller 31 is limited.

72 is an air outlet (see Figure 3),
When the ink printed on the flyer 38 to be fed has not yet dried sufficiently, air is blown out from here and passed through the upper layer of the paper to improve paper feeding conditions.

Next, the balance between the lifting spring 61 and the swing arm 29 will be explained. In FIG. 6, the state in which the auxiliary roller 31 is raised the most is shown by a solid line, and the state in which the auxiliary roller 31 is the most lowered is shown by a phantom line. The position of the support pin 59 of the lifting spring 61 is such that when the auxiliary roller 31 is lowered the most, the position of the support pin 59 of the lifting spring 61 is
2, and a vertical line F- passing through the center of the paper feed roller shaft 12.
The distance from F is l ₁ .

Also, if the auxiliary roller 31 has risen the most, E
It forms an angle H with respect to the -E line, and the distance from the F-F line is _l2 . Here l ₂ is larger than l ₁ .
The tension of the lifting spring 61 is transferred to the auxiliary roller 31.
Let P ₁ be the time when it has fallen the most and P ₂ be the time when it has risen. In this case, P ₁ is clearly greater than P ₂ .

Next, among the weights of the swing arm 29 and the auxiliary roller 31 supported thereon from the center of the paper feed roller shaft 12, let W be the weight of the part that produces a couple force that causes the auxiliary roller 31 to descend. Let R be the distance to the center of gravity Q.

And F when the auxiliary roller 31 descends the most
-The distance from line F to point Q is L ₁ , on the other hand, the distance when it rises the most is L ₂ , the strength of the lifting spring is P ₁ l ₁ = WL ₁ × 1.05, and P ₂ l ₂ = WL ₂ ×
1.02 so that the couple force is not applied to the auxiliary roller 31 as much as possible, so when the auxiliary roller shaft 32 is no longer driven, the auxiliary roller 31 is lifted from the top surface of the paper by the lifting spring 61. The auxiliary roller shaft 3 is lifted at a certain interval.
2 is driven, the auxiliary roller 31 comes into contact with the flyer 38 due to the resistance of the brake wheel 48, and the displacement of the upper surface of the paper does not cause any trouble. In the embodiment, a tension spring is used to lift the auxiliary roller 31, but a compression spring may also be used with the support pin 59 positioned on the opposite side of the F-F line. It's not something you do.

If the flyer 38 to be fed has good feeding conditions, it is only necessary to adjust the gap between the paper feeding roller 11 and the restraining piece 39 on the housing 13 and the inclination angle of the paper loading table 16. However, for example, if the sheets are stacked in the order of A, B, C, D... from the top, it will not slide well between A and B, C and D, and between B and C, D and E. If the slippage is good, use A and B.
C and D are sent out together, resulting in frequent multiple feeding, and if both sides are printed in multiple colors, the slippage is uneven and often bends to one side in the feeding direction. .

Here, we will explain the case of feeding paper with poorly dried printing ink, which has the worst paper feeding conditions among leaflets. Therefore, paper feeding is often interrupted, making it unsuitable for use.

Also, even if the auxiliary roller 31 is added, if the auxiliary roller 31 is always pressing the flyer 38,
As mentioned above, this method is also unsuitable because paper feeding is interrupted or multiple feeding occurs frequently.

In the present invention, the paper feed roller shaft 12 is used as a fulcrum, and the self weight applied to the auxiliary roller 31 is made as light as possible, and when both the paper feed roller 11 and the auxiliary roller 31 are no longer driven, the paper feed roller shaft A swinging arm 29 with 12 as a fulcrum is lifted up by a lifting spring 61, and the auxiliary roller 31 is lifted by about 5 degrees above the top surface of the leaflet 38 placed on the paper table 16, and the air is blown out from the air outlet 72. After passing the air flow inside the upper layer of the leaflet 38 and separating it into individual sheets,
When the electromagnetic clutch 26 is energized at a predetermined timing and both rollers are driven, the swing arm 29 is moved from the feed roller shaft 12 by the frictional resistance of the brake wheel 48 fixed to the auxiliary roller shaft 32. The auxiliary roller 31 comes into contact with the upper surface of the flyer 38 by being rotated in the direction of rotation of the paper feed roller 11 using the fulcrum as a fulcrum, and here the paper is fed correctly without interruption by both rollers. be.

In addition, in the case of a thin flyer of poor paper quality, the electromagnetic clutch 26 is energized and both rollers are driven, so that the flyer 38 that is fed out is sandwiched between the drawer roller 5 and the holding roller 7 and pulled out. When the electromagnetic clutch 2
When the power to 6 is cut off, the auxiliary roller 31 is lifted from the top surface of the leaflet 38, so the force of the pull-out roller 5 and the holding roller 7 to pull out the leaflet 38 is only to cause the paper feed roller 11 to idle,
This means that the paper, which is easily torn, will not be damaged.

Paper feeding conditions vary widely, including complex and slightly defective conditions, but in each case, in addition to adjusting the inclination of the paper loading table, the frictional resistance of the brake and the force of the lifting spring are changed, and the auxiliary roller is adjusted. The pressure can be adjusted to the optimum pressure according to the characteristics of the paper, and the pressure can be brought into contact with the top surface of the paper on the paper holder, so it can be used for items with complex and diverse paper feeding conditions, such as advertising paper, and its effectiveness is improved. is very large.

The conventional system mentioned in the title adjusts the opposing forces of the coil springs and balances them at a certain point, so if you deviate from this point, the balance will inevitably collapse and cause problems. As a result, the pressing force against the paper by the auxiliary roller always changes greatly, but in the present invention, the strength of the lifting spring can be set so that as little force as possible is applied to the auxiliary roller at the upper and lower limits of the auxiliary roller. Since changes in the intermediate range are almost negligible, correct paper feeding can always be performed under any conditions, and the structure is extremely simple and can be put to practical use.

[Brief explanation of the drawing]

Figure 1 is a front view of the entire device, Figure 2 is a plan view, Figure 3 is an enlarged front view of the main parts, Figure 4 is a sectional view taken along line A-B in Figure 3, and Figure 5 is the same C. -C line sectional view,
FIG. 6 is a sectional view taken along the line DD in FIG. 4. 11... Paper feed roller, 12... Paper feed roller shaft, 13... Housing, 13'... Upper housing, 22
... Bracket, 29 ... Swinging arm, 31 ...
Auxiliary roller, 32...Auxiliary roller shaft, 37,
37'... One clutch, 48... Brake wheel, 59... Support pin, 61... Lifting spring.

Claims (1)

[Scope of utility model registration request] A paper feed roller 11 is provided on a casing 13 provided at the front of a paper table 16 whose inclination angle can be adjusted freely, and is supported by a bracket 22 hanging from an upper casing 13'. A swinging arm 29 with this as a fulcrum is pivotably mounted on the swinging arm 29.
An auxiliary roller 31 that interlocks with the paper feed roller 11 is mounted on the other end of the paper feed roller 9, and both rollers 11, 31 have one built-in clutch 37, 37', and the paper feed roller shaft 12 has an electromagnetic clutch 2 built-in.
6. The auxiliary roller shaft 32 is provided with a brake wheel 48 that can adjust the braking force, and a support pin 59 is attached to the swinging arm 29 near its swinging fulcrum, and the support pin 59 is attached to the upper housing 13'. , an automatic sheet feeding device for a newspaper advertisement collating machine, in which a swinging arm 29 is adjustable and suspended by the lifting spring 61, with the lower end of the lifting spring 61 attached to the upper end attached to the support pin 59.