JPH0233611B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper feed section of a sheet-fed printing press, and in particular,
When the mounting shaft of the sutsuka, which adsorbs the accumulated sheets, separates them one by one, and sends them out, is moved vertically and horizontally by the link mechanism, the movement of this link mechanism is used to move the sutsuka shaft. The present invention relates to a variable-angle suction device for sheets, which forcibly guides and rotates the sheet, and changes the orientation of the guide member as appropriate to vary the rotation angle of the suction car when suctioning the sheet.

A large number of printing papers are piled up and prepared in a paper feed section of a sheet-fed printing machine. And these sheets are 1
In order to feed the sheets one by one to the printing unit, the negative pressure of the air attracts the sheets on the top of the pile and separates them.
The sending out sutsuka is used to cooperate with the blow foot, paper presser, etc.

The movement of the sucker for separating and delivering the stacked sheets is generated by a linkage mechanism consisting of, for example, four link members and driven by a plurality of cams. Incidentally, Japanese Patent Publication No. 51-7404 discloses an example of such a link mechanism. (Note that the sutcher to which the present invention is directed differs from the one in the above-mentioned publication in that it also performs sheet separation and feeding operations.) Conventional sutchers simply utilize the movement of the link mechanism as is. Therefore, it relies entirely on the relatively small range of motion of the cam-driven linkage. Therefore, the lifting angle of the sutcher when suctioning a sheet is small, and therefore, separation from the sheet immediately below is insufficient, and sheets are likely to overlap.

Furthermore, in recent years, it has become necessary for a single sheet-fed printing machine to be able to print on printing papers of a wide variety of properties. Printing paper comes in a variety of paper thicknesses, from thick paper to thin paper (approximately 0.04 mm), and from so-called stiff paper to less stiff paper. Therefore, if the pick-up angle of the picker can be adjusted in response to the paper quality of the sheets, it will be convenient to separate and send out the sheets.

The present invention has been made in view of the above-mentioned problems, and provides an advanced paper sheet changing angle suction device.The main objectives thereof are to increase the pick-up angle of the sucker and The objective is to be able to adjust the scooping angle of the satsuka according to the situation.

To this end, the first aspect of the present invention is to forcibly guide the follower shaft, which is rotatably supported by the movable joint of the link mechanism, along a specific path to cause the follower to move significantly. It is something.

Further, in a second aspect of the present invention, the rotation angle of the follower is adjusted by appropriately changing the attitude of the guide member of the follower shaft.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic side view, FIG. 2A, and FIG.
Figure B is a cross-sectional view of the apparatus shown in Figure 1 when viewed from above, and Figure 3 is a partial cross-sectional view of the apparatus shown in Figure 1, particularly showing parts directly related to the suction shaft. , FIG. 4 is a sectional view showing an example of the soccer car.

First, the link mechanism that is the premise of the apparatus of the present invention will be explained. A first shaft 2, which is a fixed joint, is installed between frames 1 of the paper feed section via a bearing 3. With this first axis 2 as a reference, four link members 4, 5, 6, and 7 are arranged in relation to each other, and among these, a second link member 5 and a fourth link member are arranged. A suction shaft 8, which is a movable joint, is rotatably attached to the connection point with the rotor 7 via bearings 9 and 10.

The link members include those that mainly contribute to the horizontal movement of the soccer shaft 8 (the first link member 4
and a second link member 5), and those that mainly contribute to vertical movement (a third link member 6 and a fourth link member 7). To explain each of these, as shown in FIG. 2A, the upper end of the first link member 4 is fixed to the first shaft 2, and the lower end is fixed to the second shaft 11. keeping. Then, a second shaft is attached to this second shaft 11.
One end of the link member 5 is connected via a bearing 12, and the other end is connected to a soccer shaft 8 via a bearing 9.
is held rotatably. One end of the third link member 6 that contributes to the vertical movement of the suction shaft 8 is connected to the first shaft 2 via a bearing 13 (FIGS. 2A and 2B), and the other end is , holds the pin 14 fixedly. The upper end of the fourth link member 7 is connected to this pin 14 via a bearing 15 (FIG. 2B), and the lower end is
A support shaft 8 is rotatably held together with the second link member 5 via a bearing 10 (second
Figure A).

In order to drive the link mechanisms that are related to each other as described above in synchronization with the printing press main body, a first
A cam 17 and a second cam 18 are attached. Among these, the first cam 17 contributes to the movement of the follower shaft 8 in the horizontal direction.
A first cam roller 19 provided in the middle of the link member 4 is constantly in contact with the urging force of a spring 20. Further, the second cam 18 contributes to the movement of the support shaft 8 in the vertical direction, and a second cam roller 21 provided in the middle of the third link member 6 is biased by a spring 22. It is in constant contact.

The follower shaft 8, which is rotatably held via bearings 9 and 10 at the movable joint that is the connection point of the second link member 5 and the fourth link member 7 of the link mechanism described above, has a plurality of follower bodies. 23 are fixed by mounting bolts 24. As an example is shown in FIG. 4, the suction car body 23 utilizes the suction effect of negative pressure of air, and is already well known. The soccer car body 2 used in the device of the present invention
3 may be a direct acting type or a differential type in air suction type. The main purpose of the present invention is to make the scooping angle of the sucker body 23 large and variable by rotating the sukkah shaft 8 to which the sukkah body 23 is fixed according to a desired position.

The rotation angle of the pivot shaft 8 rotatably attached to the moving joint of the link mechanism is larger than the displacement caused by the link mechanism and is variable, while utilizing the movement in the vertical and horizontal directions by the link mechanism. In order to provide this, one end of the actuating arm 25 is fixed to the suction shaft 8 by a tightening bolt 26, and a freely rolling roller 27 is attached to the other end as a linking device with a guide member 28.

As shown in the perspective view of FIG. 5, the guide member 28 engages the roller 27 of the actuating arm 25 to follow a specific path (in the drawing, it is linear, but is not necessarily limited to this). It has a guide groove 29 that guides the user.

A first aspect of the present invention is that the guide groove 29 of the guide member 28 forcibly guides one end of the actuating arm 25 to a specific path, thereby causing the suction shaft 8 to
While utilizing the motion of the link mechanism, it is intended to provide a rotation angle that exceeds the limits of the motion, thereby increasing the scooping angle of the sucker body 23. Further, in a second aspect of the present invention, the actuating arm 2
The purpose is to change the guide path of the feeder shaft 5, thereby making the rotation angle of the feeder shaft 8 variable in accordance with the quality of the sheet of paper, etc.

As best shown in FIG. 2A, the guide member 2
8 is rotatably supported by a holder 31 by a connecting pin 30 with the connecting pin 30 as the center. In addition, 32 indicates a set screw, and the connecting pin 3
0 to the holder 31. Further, a gear portion 33 (the one shown is a so-called sector gear) is formed on the outer periphery of the guide member 28, and an angle setting means 34 is formed on this gear portion 33.
The pinion 35 is in mesh.

The angle setting means 34 is provided through the holder 31 so as to be able to rotate and stop.
By rotating the knob 36 projecting to the outside of 1, the pinion 35 engages the gear portion 33 of the guide member 28
The guide member 28 is rotated around the connecting pin 30. Then, the attitude of the guide member 28 is changed, and the position of the guide groove 29, which is the guide path of the actuating arm 25, is changed.

The rotation operation of the guide member 28 by the angle setting means 34 may be performed arbitrarily and steplessly, but the posture angle of the guide member 28 with respect to the holder 31 is specified in several stages, The guide member 28 may be properly fixed at rest. For this purpose, the guide member 28 has an engaging recess 3.
7 are provided in several places, and on the holder 31 side,
Ball stopper 39 biased by spring 38
will be prepared. Then, when the guide member 28 reaches a specific angle, the ball stopper 39 fits into the engagement recess 37 to temporarily maintain the guide member 28 in a specific posture.

In addition, if we talk about the holder 31 here,
Since this holder 31 serves as a reference for setting the posture of the guide member 28, no matter how the link mechanism moves, the guide member 28 (more specifically, the connecting pin 30, which is the center of rotation) must be kept in a constant horizontal position. Therefore, one end of the holder 31 is connected to the second end via the bearing 40.
It is rotatably attached to the shaft 11 of. Further, a guide roller 41 is provided directly above the connecting pin 30.
The guide roller 41 engages with a guide rail 42 mounted horizontally on the frame 1, so that a constant horizontal position is always maintained despite the movement of the link mechanism.

Next, the operation of the above embodiment will be explained.
FIGS. 6A and 6B are partial side views showing how the suction shaft 8, which is a movable node, is moved by the link mechanism. Of these, FIG. 6A shows the sukkah main body 23 fixed to the sukkah shaft 8.
shows a state in which the piled sheet 43 is about to be picked up at its lower limit. Also, the 6th B
In the figure, the link members 4, 5, 6, and 7 are operated in conjunction with each other by the first cam 17 and the second cam 18, and the suction car shaft 8 is thereby moved in the vertical and horizontal directions, and the suction car main body 23 is moved. The uppermost state of the top sheet 43 of the pile is shown after being cut out. Such vertical and horizontal movement of the suspension shaft 8 is as follows:
This is caused solely by the operation of the link mechanism, and is no different from conventional suction devices.

The characteristics of the operation of the angle-changing suction device according to the present invention are clearly shown in FIGS. The rotation angle of the follower shaft 8 is made variable by guiding the guide member 28 and changing the posture of the guide member 28 as appropriate.

In the case of FIGS. 7A and 7B, the guide groove 29 of the guide member 28 is substantially vertical, along which the roller 27 at one end of the actuating arm 25 is guided. Therefore, as shown in FIG. 7B, when the follower shaft 8 is moved vertically and horizontally by the operation of the link mechanism, the guide member 28 moves together with the holder 31 while remaining at a constant horizontal position, but the guide groove The guiding angle of the sutcher 29 remains almost vertical, so the operating arm 25 and the sutcher shaft 8 are only slightly rotated, and the lifting angle of the sutcher main body 23 also remains small. The winding angle is also appropriate when the sheet 43 is made of cardboard.)

In the case of FIGS. 8A and 8B, the guide member 2
8 is largely rotated around the connecting pin 30, and therefore the guide angle of the roller 27 by the guide groove 29 is also largely inclined. Such a change in the attitude of the guide member 28 is performed using the knob 3 of the angle setting means 34.
6 and transmitting torque to the gear section 33 of the guide member 28 by means of the pinion 35 is easily understood. In addition, a stopper means (ball stopper 39
etc.), it is also possible to temporarily stop the posture of the guide member 28 at a specific angle. In this way, when the guide angle of the guide groove 39 is large, as shown in the figure,
The actuating arm 25 is also tilted greatly with the movement of the chaser shaft 8, thereby causing the chaser body 23 to move.
Also, the sheet 43 is cut up at a large turning angle (such a large turning angle is effective when the sheet 43 is thin paper).

As described above, according to the angle-changing suction device of the present invention, the suction shaft rotatably supported by the movable joint of the link mechanism is forcibly guided to a specific path by the guide member. By moving the paper sheet, it is possible to increase the winding angle of the sheets and ensure separation and conveyance. In addition, since the orientation of the guide member is arbitrarily changed by the angle setting means, it is possible to change the guide angle of the sucker shaft and select the optimum paper-up angle corresponding to the paper quality. Therefore, the apparatus of the present invention is useful because it can reliably separate and convey sheets and prevent stacking.

[Brief explanation of drawings]

FIG. 1 is a schematic side view, FIG. 2A, and FIG.
Figure B is a cross-sectional view of the apparatus shown in Figure 1 when viewed from above, and Figure 3 is a partial cross-sectional view of the apparatus shown in Figure 1, particularly showing parts directly related to the suction shaft. , FIG. 4 is a sectional view showing an example of a follower, FIG. 5 is a perspective view showing the guide member of the device of the present invention, and FIGS. 6A and 6B are diagrams showing the movement of the link mechanism of the device of the present invention. FIGS. 7A and 7B are partial side views for explaining the movement of the soccer car when the guiding angle by the guide member is relatively small, and FIGS. 8A and 8B are FIG. 4 is a side view for explaining the movement of the soccer car when the guide angle is relatively large. DESCRIPTION OF SYMBOLS 1... Frame, 2... First shaft, 3... Bearing, 4... First link member, 5... Second link member, 6... Third link member, 7... Fourth link member, 8... Satsuka shaft, 9... bearing, 1
0...Bearing, 11...Second shaft, 12...Bearing,
13...Bearing, 14...Pin, 15...Bearing, 1
6...Camshaft, 17...First cam, 18...Second cam, 19...First cam roller, 20...
... Spring, 21 ... Second cam roller, 2
2... Spring, 23... Satsuka body, 25
... Operating arm, 27 ... Roller, 28 ... Guide member, 29 ... Guide groove, 30 ... Connection pin, 3
1...Holder, 33...Gear portion, 34...Angle setting means, 35...Pinion, 36...Knob,
37... Engagement recess, 39... Ball stopper, 4
0... Bearing, 41... Guide roller, 42...
Guide rail, 43... sheet of paper.

Claims (1)

[Scope of Claims] 1. A plurality of link members 4, 5, 6, 7 are related to each other and actuated by cams 17, 18 based on a fixed joint 2 fixed to a frame 1 of a paper feeding section, a link mechanism in which a movable section 8 facing the fixed section 2 is moved vertically and horizontally; a suction shaft 8 rotatably supported by the movable section 8 and to which a suction section 23 is connected and fixed; one end; is fixed to the suction shaft 8 and has a linking tool 27 at the other end; an operating arm 25 that is moved in the horizontal direction integrally with the link mechanism, and the linking tool 27 of the operating arm 25 engages;
and a guide member 28 that guides the linking tool 27 to a specific path. 2. A plurality of link members 4, 5, 6, 7 are related to each other and are actuated by cams 17, 18 with reference to the fixed joint 2 fixed to the frame 1 of the paper feeding section, and are arranged opposite to the fixed joint 2. a link mechanism in which the movable section 8 is moved vertically and horizontally; a follower shaft 8 rotatably supported by the movable section 8 and to which the follower 23 is connected and fixed; an actuating arm 25 that is fixed and has a linking tool 27 at the other end; a holder 31 that is moved in the horizontal direction integrally with the link mechanism; 25 linking tools 27 are engaged,
and a guide member 28 that guides the linking tool 27 to a specific path.