JPH0324514Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention is a method for sheet-fed printing machines, paper folding machines, etc., to collect sheets of paper (hereinafter referred to as paper) stacked on a paper stacking table one by one. The present invention relates to an automatic paper feeder for supplying paper, and more particularly to an improvement in a control mechanism that controls the movement of a suction device that moves up and down to attract and lift the top layer of paper and separate it from the lower paper.

[Prior art] Machines that handle paper, such as sheet-fed printing machines and paper folding machines, have an automatic paper feeding system that sucks up each sheet of paper stacked on a paper stack and sends them forward one by one. A paper feeding device is provided for carrying out the process. This type of paper feeding device generally has a first suction device for paper separation that lifts the top layer of paper one by one and separates it from the lower paper by repeatedly lifting and lowering the paper on the paper stacking table. and a second suction device for supplying paper picked up by the first suction device, one by one, to the main equipment side by repeating up/down, forward, and backward operations, and each of these suction devices It is equipped with a drive system that drives the device, a control system that controls its movement, an adjustment system that adjusts its posture, an air intake source that is connected via an air hose, and an air blower that assists in lifting and separating the paper. A sensor for detecting the height of the paper on the paper stacking table and raising and lowering the paper stacking table, a paper stacking table lifting device, etc. are provided as appropriate.

In the paper feeding device configured as described above, the first suction device descends to suction the top layer of paper on the paper stacking table, and then ascends in that state to lift up the paper. Air is blown between the paper and the second sheet, and a blower foot enters to press down on the lower layer of paper and separate it. Next, the second suction device suctions the above-mentioned floating paper, and at the same time the first suction device suctions the lifted paper.
The suction action of the suction device is stopped, and the second suction device advances in the paper feeding direction while descending, so that the paper is removed from the first suction device and is removed by the second suction device. The paper is sent forward and fed to the main device by a paper feed roller or the like. At this time, the second suction device removes the paper after the suction air is cut off, and then rises and retreats to return to the old position, thereby completing one cycle of the paper feeding operation.

By the way, in such a paper feeding device, the present applicant has proposed a paper separation method in which the papers on the paper stacking table are sucked and lifted one by one by lifting and lowering operations, as shown in Japanese Patent Application Laid-Open No. 145738/1983. Regarding the first suction device for paper, we have previously proposed a paper feeding device that has an improved drive and adjustment system.

To briefly explain this using FIGS. 1 to 4, the frame 1 supported by the paper feeder frame (not shown) is separated from the front plate 1a, the rear plate 1b, and the left and right side plates 1c and 1d. It is generally configured to be movable in a direction perpendicular to the paper plane of FIG. 1 and to be fixed at a desired position. Note that the front plate 1a here refers to a plate located on the front side in the figure on the opposite side to the paper feeding direction of the stacked paper 2, and the rear plate 1b is located behind it, that is, a printing machine or a paper receiving device that receives paper feed. This refers to the board closest to the folding machine. In addition, the suction devices 3, 3 and the members that support them and perform posture control described below form a pair, and substantially the same ones are provided on the left and right side plates 1a, 1d, so that As a general rule, the right side plate 1d
Only those provided on the left side plate 1c will be explained, and the same reference numerals will be given to those provided on the left side plate 1c, and the explanation will be omitted.

Inside the left and right side plates 213, 214 of the Satsuka frame 1, there is an adjustment mechanism 5 in which the main body 4 of the suction device, generally designated by reference numeral 3, is movable in the front and back and left and right directions.
Therefore, the main body part 4 of this suction device 3 is swingable in the front and back direction (paper feeding direction) and in the lateral direction (paper feeding direction) by the adjustment mechanism 5.
(width direction). In addition,
In the figure, 5a is an operating section of the adjustment mechanism 5, and further explanation of the structure of the adjustment mechanism 5, etc. will be omitted.

Furthermore, this main body part 4 is provided with an inner hole 6 that extends in the vertical direction and opens at its lower end. An air hose 7 connected to an air intake source is attached.

Further, the lower part of the main body 4 of the suction member 3 is formed in a cylindrical shape, and an upper cylinder 8A constituting the suction member 8, which is also formed in a cylindrical shape, is slidably attached to the cylindrical part 4a from below. is fitted in.
An outer spring 9 is interposed between the upper end surface of the upper cylinder 8A and the lower end surface of the main body 4 to bias the upper cylinder 8A downward. A flange 10 is provided above the upper cylinder 8A.
is provided protrudingly, and this is the guide member 1 to be described later.
By being held between upper and lower guides 11a and 11b, its vertical movement is restricted. Further, the lower part of the upper cylinder 8A is formed into a cylindrical shape with a bottom, and has a plurality of intake ports 1 at the bottom.
A lower cylinder 8B constituting the mouthpiece member 8 with 2
is slidably fitted from below. An inner spring 13 is interposed between the inner bottom surface of the lower cylindrical body 8B and the step of the inner hole 6 of the main body 4 to bias the lower cylindrical body 8B downward. . The lower cylinder 8B also has a flange 14 projecting upward and a flange 1 of the upper cylinder 8A.
0 and is suspended by a restriction pin 15 provided between it and the rotation thereof is regulated. On the other hand, the upper cylinder 8A of this suction member 8 has a front plate 1a.
It is configured to move up and down while its rotation is restricted by sliding contact with a guide plate 16 attached to the inside of the holder.

On the other hand, the left and right side plates 1c and 1d of the Satsuka frame 1
is provided with a cam 20 supported by a cam shaft 20a that rotates in synchronization with the sucking operation of the paper 2 by the suction member 8, and a lever shaft 21 is rotatably mounted below the cam 20. ing. A cam lever 22 formed in an L shape with two arms 22a and 22b is attached to a collar 23 on this lever shaft 21.
A cam follower 2 attached to the cam surface of the cam 20 is attached to the free end of one arm 22a.
4 is pivoted. In addition, the other arm 22b
A cam follower 24 is connected to the cam 20 with respect to the cam lever 22 between the intermediate part of the
A tension spring 25 is tensioned to apply a rotational force in a direction to bring the cam surface into pressure contact with the cam surface. Further, a guide rod 26 is held at the free end of the arm 22b of the cam lever 22, and lower guides 11b forming the guide member 11 are provided at both ends of the guide rod 26. Further, a guide support 11c that is pivoted on the guide rod 26 in close proximity to the lower guide 11b includes a
and an upper guide 11a that holds the flange 10 of the upper cylinder 8A of the suction member 8 from above and below.
is provided.

As is well known, in the vicinity of the suction member 8, a blower foot (not shown) is provided that can move forward and backward from the outside in the paper feeding direction with respect to the paper on the paper stacking stand (not shown). In addition, this blowing foot, further air blowing, a second suction device for paper feeding, a pair of paper feeding rollers, etc. are arranged as appropriate, but the configuration etc. are the same as these members that are well known in the past. Therefore, its explanation will be omitted.

To briefly explain the operation of the paper feeding device configured as above, first, the paper 2 is stacked on the paper stacking table, and the upper layer of the paper is blown with air to improve separation. Start feeding paper. In this case, the cam follower 24 is in contact with the large diameter part of the cam 20, and the upper and lower guides 11a and 11b are lowered via the cam lever 22 and the guide rod 26, and the suction member 8 with the flange 10 sandwiched therebetween is lowered. The upper cylinder 8A is lowered. Further, the lower cylinder 8B is also lowered by the elastic force of the inner spring 13. When air is taken in in this state, the paper 2 at the top is sucked and closes the intake hole 12 of the lower cylinder 8B of the suction member 8, and the inside of the lower cylinder 8B and the inner hole 6 above it are completely filled. Since the pressure becomes negative, the inner spring 13 is compressed by atmospheric pressure, and the lower cylinder 8B rises while adsorbing the paper 22. Then, when the flange 14 of the lower cylinder 8B comes into contact with the flange 10 of the upper cylinder 8A, its ascent is momentarily stopped, and at the same time, a blowing foot (not shown) approaches, and 2
Press down on the top surface of the first sheet of paper to prevent the laminated paper from flapping. At this time, the cam follower 24
0, the inner spring 13 is compressed and the upper and lower cylinders 8A, 8, which are the suction member 8,
Together, B rises further while compressing outer spring A, and when it reaches its highest point, air is blown out from the foot of the foot, and paper 2, which has been sucked up and raised, is floated by air being blown over its entire lower surface. state. In this state, air is sucked into the second suction device for paper supply and suctions the floating paper 2, and at the same time the suction to the first suction device 3 for paper separation described above is stopped, so that the inside of the second suction device 3 for paper separation is stopped. As the pressure approaches atmospheric pressure, the lower cylindrical body 8B of the suction member 8 suddenly descends due to the elastic force of the inner spring 13, pushing down the paper 2 and releasing it from the lower cylindrical body 8B. Thereafter, the second suction device transports the paper 2, and the upper cylinder 8A is lowered by the action of the cam 20, thereby completing one cycle.

In the sheet feeding operation performed in this manner, the lower cylinder 8B constituting the suction member 8 comes into contact with the flange 10 of the upper cylinder 8A on the way up and suddenly stops momentarily. As the paper 2 is fanned, wind is generated due to the elasticity of the paper, and the paper 2 is air-filled from the rear end to the center. Moreover, when the upper cylinder 8A finishes compressing the outer spring 9 and stops, the paper 2 is fanned again, so that the front part of the paper 2 is air-filled. By airing in this manner, the paper is completely separated. Furthermore, when the paper 2 is delivered to the second suction device, the lower cylinder 8B rapidly pushes down the paper 2, so the paper is released easily and the delivered paper 2 is not distorted or misregistered. It's something that doesn't exist.

In addition, when starting work or changing stacks of paper, as mentioned above, it is necessary to correct the bent paper stack on the paper stacking table, or to pull the paper in the width direction when suctioning it. Adjustment work to the first suction devices 3, 3 for tensioning is also carried out by the adjustment mechanism 5,
5, it can be done easily and appropriately.

By the way, in the suction device having the above-described configuration, the suction member 8 of the first suction device 3 is moved up and down so as to suction and lift the top layer of paper 2.
Cam lever 2 that swings by the cam surface of cam 20
The flange 10 on the suction member 8 side is held by the guide member 11 on the guide rod 26 provided at one end of the cam lever 22, and its movement is appropriately controlled. Since the position moves along an arcuate trajectory due to the swinging of the cam lever 22, as shown in FIG.
It moves back and forth with a predetermined stroke in the paper direction (in the drawing). In the paper absorbing device described above,
The guide member 11 on the cam lever 22 side is the suction member 8
Since it faces the flange 10 from a direction perpendicular to the paper feeding direction, the above-mentioned reciprocating movement in the paper feeding direction results in a rotational force acting on the suction member 8 on its axis. . Of course, the flange 10 of the mouthpiece member 8 is supported by a guide plate 16 provided on the side of the suction frame 1 so that it can move up and down with its rotation restricted, but when the above-mentioned rotational force is applied, In this case, the sliding surface of the flange 10 of the mouthpiece member 8 slides against the guide plate 16 in a state where it is in partial contact with the guide plate 16, resulting in wear of this part. If such abrasion occurs, not only will the proper lifting and lowering movement of the suction member 8 be hindered, but the paper 2 that is attracted and lifted by the suction member 8 will be bent, twisted, and even sag. , it is desired that some kind of countermeasure be taken. In particular, the above-mentioned paper feeding device is operated at a considerably high speed, and wear caused by uneven contact due to the above-mentioned rotational force may cause frequent replacement of the suction member 8 and the guide plate 16. However, there were problems in terms of workability and cost.

[Summary of the idea]

The present invention was developed in view of these circumstances, and the guide member provided on the cam lever side of the flange provided on the suction member that can be raised and lowered of the suction device is arranged opposite to the guide plate of the suction member. Due to the simple structure of positioning the guide member in the paper feeding direction side, the reciprocating movement of the guide member in the paper feeding direction due to the swinging of the cam lever passes through the axis of the suction member and is slidably guided by the guide plate. As a result, there is no rotational force on the suction member as in the past, which eliminates the problem of wear between the suction member and the guide plate due to uneven contact, and as a result, proper and smooth operation of the suction member is achieved. The present invention provides an inexpensive paper feeding device that can maintain paper suction and lifting functions through lifting and lowering operations.

Figures 6 to 8 show an embodiment of the paper feeding device according to the present invention, and in these figures, the same or corresponding parts as in Figures 1 to 4 are designated by the same numbers. Therefore, the explanation will be omitted.

Now, according to the present invention, guide rods 26 are provided at both ends of the guide rod 26 that holds the flange 10 of the suction member 8 that moves up and down in the first suction device 3 for paper separation while being controlled by the swinging movement of the cam lever 22. The guide member 11 is configured to be located on the paper feeding direction side opposite to the guide plate 16, which supports the suction member 8 with respect to the flange 10 so as to be movable up and down with rotation restricted. It has the following characteristics. That is, the upper and lower guides 11a and 11b constituting this guide member 11 connect the flange 10 of the mouthpiece member 8 to the guide plate 1 via this mouthpiece member 8.
It is arranged so that the part located on the side edge side opposite to 6 is slidably held.

According to this configuration, above these,
When the suction member 8 moves up and down, the lower guides 11a and 11b move back and forth in the centripetal direction of the suction member 8, that is, with respect to its axis, as the cam lever 22 swings, as shown in FIG. Then,
Moreover, since the opposite side of the suction member 8 abuts parallel to the guide plate 16, no rotational force is generated as in the conventional case, and uneven wear is prevented. Problems such as bending and twisting of the paper are eliminated, and the paper feeding device can exhibit its performance.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part can be modified and changed as necessary. For example, the guide member 11 that holds the flange 10 of the mouthpiece member 8 is not limited to the upper and lower guides 11a and 11b shown in the embodiment,
Of course, a type that holds the flange 10 only from below may also be used. Furthermore, the guides 11a and 11b are not limited to roller-shaped guides, but may be rotatably supported roller-type guides. It is sufficient to adopt a configuration similar to the above-mentioned collotype. The point is that the flange of the mouthpiece member can be held with the minimum necessary friction.

Further, the present invention is not limited to the two-stage configuration in which the suction member 8 is composed of the upper and lower cylinder bodies 8A and 8B as described above, but also applicable to the one-stage configuration in which these are constituted by an integral cylinder. It is obvious that the invention can be applied, and the configurations of other parts can also be changed freely.

[Effect of idea]

As set forth above, according to the paper feeding device according to the present invention, the guide member on the cam lever side that controls the movement of the flange provided on the suction member of the suction device for paper separation that moves up and down, Since the suction member is located on the paper feeding direction side opposite to the guide plate, the guide member can be moved back and forth in the paper feeding direction by the swing of the cam lever, despite the simple and inexpensive structure. Since the movement passes through the axis of the mouthpiece member and is held by its guide plate, there is no rotational force acting on the mouthpiece member as in the past, and the problem of wear due to uneven contact between the mouthpiece member and the guide plate is eliminated. This makes the vertical movement of the suction member proper and smooth, and the suction and lifting movement of the paper.
This has an excellent practical effect in that it can be carried out appropriately without causing the paper to bend or the like.

[Brief explanation of the drawing]

1 to 5 show an example of a conventional paper feeding device, FIG. 1 is a front view with the front plate removed, FIGS. 2 and 3 are the - line in FIG.
4 is a sectional view taken along line - of FIG. FIG. 6 is a front view of the main parts with the front plate removed, and FIGS. 7 and 8 are the 6th embodiment.
The sectional view taken along the - line and - line in the figure, and FIG. 9 are main part configuration diagrams of the characteristic parts. 1... Satsuka frame, 2... Sheets (paper),
3... Adsorption device for paper separation, 4... Main body, 8,
8A, 8B...Sucking member, 9...Outer spring, 10...
...Flange, 11, 11a, 11b...Guide member, 12...Intake port, 16...Guide plate, 20...
Cam, 21... lever shaft, 22... cam lever,
25... tension spring, 26... guide rod.

Claims (1)

[Scope of utility model registration request] a pair of suction devices 3 having a movable suction member 8 that suctions and raises sheets 2 stacked on a paper feed table one by one and is constantly urged downward;
3, a guide plate 16 that guides the suction member 8 of each of these suction devices in a vertically movable manner on the side opposite to the sheet feeding direction, and a guide plate 16 that is located on the paper feeding direction side of the suction devices 3, Therefore, the suction member 8 of the suction device 3, 3 is slidably supported on the shaft, and the suction member 8 of the suction device 3, 3 is attached to the swing end.
A cam lever 22 having a guide rod 26 extending to the 8 side, and a flange 1 provided at both ends of the guide rod 26 and provided on a part of the suction members 8, 8.
a guide member 11 that slidably holds the 0;
A paper feeding device characterized in that this guide member 11 is located on the opposite side of the guide plate 16 in the paper feeding direction with respect to the suction members 8, 8.