JPS61119542A - Driving apparatus for paper supply - Google Patents

Abstract

PURPOSE:To obtain the simple mechanism of the captioned apparatus by pressing a projection on the outer periphery of an endless rotary feed belt onto the rear edge of the paper sheet in temporary stop which is driven-out onto a table and feeding said paper sheet onto a printing trunk. CONSTITUTION:A sheet of paper P1 driven-out from a paper driving-out belt driving mechanism 13 is inserted into between a feed wheel 39 and a pressing roller 41, and moved by the feed wheel 39 revolving in the normal direction, and pushed-out onto a table 40. When the rear edge of the paper sheet P1 is released from the wheel 39 and the roller 41, the paper sheet P1 stops on the table 40 once. While, a projection 37 projecting onto the table 40 of an endless rotary feed belt 36 synchronously revolved with a printing trunk contacts with the rear edge of the paper sheet P1 and pushes the paper sheet P1, which is inserted into between a rubber trunk 22 and a pressing trunk 23, and then printing operation is carried-out. Further, clutch is cut-off by pulling-out a clutch hook from a concaved groove by the signal of a detector 11, and a belt 36 is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to printing presses, and more particularly to a drive device for paper feeding in a sheet-fed printing press.

In a rotary printing press that prints on sheets, the accumulated sheets are intermittently fed out one by one and then fed into the printing cylinder of the printing press for printing. In this case, to feed the paper,
There is a method in which the seed paper is fed out one by one from above using a suction method, and a method in which the seed paper is fed out one by one from the bottom using a friction method. The present invention is related to a friction type feeding method from below.

A paper feeding device of a printing press generally consists of a paper feeding device that feeds out seed paper and a paper feeding device that feeds the fed paper to a printing cylinder. In addition, it usually includes a detection device and a stopping device that determine whether the paper is being fed correctly or incorrectly and either transports the paper as it is or stops the paper.

The present invention is characterized by the use of an endless rotating belt having protrusions on its outer periphery to feed the sheets. According to K, when the paper fed onto the paper feed table is temporarily stopped on the paper feed table by the paper feed belt drive mechanism, the protrusion on the outer periphery of the endless rotary feed belt moves. , the rear end of the paper is pressed, and the paper is pushed from behind by the protrusion and inserted into the printing cylinder. In this case, the paper is fed into the printing cylinder with its trailing edge as a reference. This eliminates the need for a gripping device or the like on the printing cylinder side and simplifies the mechanism.

In this invention, the paper feed belt drive mechanism is operated by receiving driving force from one shaft of the printing press through a link mechanism. The paper feed belt drive mechanism is also driven by receiving driving force from one shaft of the printing press via a gear. Furthermore, a clutch device is installed on one shaft of the printing press, and a detection device is installed to detect the paper feeding status regarding the paper feed belt.
A clutch device is actuated by a signal from the detection device, thereby controlling the operations of the paper feed belt and the paper feed belt.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The paper feeding drive device of the present invention will be described below with reference to embodiments thereof and related drawings.

FIG. 1 is a side view of an offset printing machine in which the paper feed drive device of the present invention is incorporated. 10 represents the entire printing press, and 11 represents the framework of the printing press. 13 is a paper feeding belt drive mechanism, and 12 is a paper feed belt drive mechanism. 21 is a plate cylinder, 22 is a blanket cylinder, and 23 is an impression cylinder, and these cylinders can be collectively called a printing cylinder.

Next, in FIG. 2, 24 is a cam disc mounted coaxially with the impression cylinder 23, and this disc is integrated with a gear as described later. (However, this cam and gear do not necessarily have to be installed coaxially with the impression cylinder. A separate shaft that is driven in synchronization with the impression cylinder (or printing cylinder) is provided, and the cam and gear are installed on this separate shaft. ) 25 is the cam follower, 26 is the bent rod, 2
8 is a curved rod at the other end of the straight rod, and one end is the segment gear 29
It is formed as. 31 is a spring that biases the curved rod 26 and therefore the cam follower. To explain the operation of this link mechanism, the cam disk 24 receives power from the impression cylinder 23 which is driven by power and is driven to rotate. Since the cam follower 25 is constantly pressed against the cam disk by the spring 31, when the cam disk rotates, the cam follower swings following the contour of the disk, so that the curved rod 26 rotates around its pivot point. It swings at the center and reciprocates linearly. This movement is transmitted via the straight rod 27 to the leftmost bent rod 28, and therefore also swings the segment gear 29 formed on the opposite side with respect to the pivot axis of this bent rod. The above members are combined together to form a link mechanism 14 that transmits power, and the segment gear 29 serves to transmit power to the paper feed belt mechanism 9, as will be described later.

3 and 4 are diagrams mainly showing the paper feeding belt mechanism 13. FIG.

P in the figure. 53 is an endless rotary feeding belt (there are two in this embodiment) that operates intermittently to feed out the paper.As seen in Figures 3 and 4 (developed view), the belt on the right side of the belt is The end rests on a belt pulley 57 on a shaft 55. Further, the left end of the belt is hung on the belt wheel 58 on the left side. Axis 5
One end of the pinion gear 5 passes through the frame 11 and extends outward (downward in FIG. 4), and a pinion gear 63 with a one-way clutch 64 is installed in this extension.

Further, the segment gear 29 of the link mechanism 14 for transmitting the power described above is meshed with the pinion gear 63 of the paper feeding belt mechanism. Therefore, when the segment gear 29 swings due to the drive from the impression cylinder 23, the pinion gear 63 also rotates reciprocatingly in the clockwise and counterclockwise directions. However, the one-way clutch 64
It is installed between the pinion gear and the shaft 55, so that the shaft 55 can only rotate in the clockwise direction (or in the forward direction or in the direction in which the paper is fed out) K. That is, only when the segment gear 29 swings counterclockwise as viewed in FIG. 3, the shaft 55 rotates in the forward direction, and therefore the feed belt 53 rotates in the forward direction. Seed paper P deposited on the feeding belt 53. are fed out one by one starting from the bottom paper by the above-mentioned operation of the feeding belt 53. The paper thus fed out is inserted between the feed wheel of the paper feed belt mechanism 12 and the presser roller.

In this embodiment, as seen in FIGS. 1 and 3, the paper feeding belt mechanism 13 can be separated from the paper feeding belt mechanism.

However, since this point is not the main point of the present invention, it will not be discussed in detail in this specification.

Next, regarding the paper feed belt drive mechanism, in Figures 1, 5, and 6, 33 is a gear attached coaxially with the impression cylinder 23, and as mentioned above, this gear is integrated with the cam disc 24. It is composed of (In this embodiment, the integrated cam and gear are provided coaxially with the impression cylinder 23, but this is not necessarily the case. In other words, another shaft that is driven synchronously with the printing cylinder is provided, and this separate shaft You can also place the cam and gear on top.)
36 is a protrusion, and 37 is a toothed belt with two attached to the outer periphery (note that the number of protrusions is not critical), which is an endless rotating speed belt for paper feeding. A plurality of belts 36 are used. 35 is a gear on the shaft at one end of the feed belt, and receives driving force from the intermediate gear 34. The teeth of the feed belt 36 are connected to the toothed belt wheel 4 on the belt shaft.
2 and is driven. The shaft 3 is located at the left end of the feed belt 36.
8, and a belt pulley 43 is provided on the shaft, on which a feed belt 36 is hung (FIG. 3). A feed wheel 39 for feeding the paper P1 onto the table 4° is provided on the shaft 38 in the middle of the feed belt, and a paper presser roller cooperates with this to press down the paper. 41 is positioned directly above the feeder wheel 39.

As can be clearly seen in FIG. 3, the top of the feed wheel 39 is aligned with the surface of the table 4o, while the feed belt 36 is radially smaller than the feed wheel 39 with respect to the shaft 38. At this position, and under the circumstances of the table 4o, only the protrusion 37 of the feed belt 36 is exposed on the table 40.

Regarding the movement of paper in the paper feed belt drive mechanism, a sheet of paper fed out from the paper feed belt drive mechanism 13 is inserted between the feed wheel 39 and the presser roller 41.

Then, the paper is fed in the forward direction (the direction in which the paper is fed towards the printing machine).
It is driven by a rotating feed wheel and pushed onto the table 4o. When the trailing edge of the paper comes off the feed wheel and presser roller, the paper temporarily stops on the table 40. On the other hand, the endless rotating speed belt 36 for paper feeding rotates in synchronization with the printing cylinder, and when its protrusion 37 hits the rear end of the paper P1, it pushes it forward. Side guide plates are provided on both sides of the table to guide the paper P so that it quickly advances on the table. The paper is inserted between the sheets, where printing is performed, and the paper is stored in the paper ejection device 15 as paper P2 after passing through a paper ejection roller.

Next, a device for stopping the paper feed belt and paper feed belt using one fixed position clutch will be explained mainly with reference to FIGS. 5 and 6. First, the clutch device 90 will be explained. The impression cylinder 23 is driven by the drive gear 1T of the printing press, and a clutch disc 91 is connected coaxially with the impression cylinder.
has a clutch groove 92 and is fixedly removed. 24 and 33 are formed integrally with the aforementioned cam disc and gear, and are rotatably mounted on the shaft 94 of the impression cylinder via a ball bearing or the like 93.

(In this embodiment, the clutch disc 91, the integral cam 24
Although the gear 33 and the impression cylinder 23 are provided coaxially, this need not necessarily be the case. That is, another shaft driven synchronously with the printing cylinder may be provided, and the above-mentioned clutch disc, integral cam and gear may be arranged on the G shaft. Even if this is done, there will be no essential difference in the configuration and operation described below. ) A clutch piece 95 having a pawl 9T on the side where the gear 33 faces the clutch disk 91 is rotatably mounted on the integrated cam and gear about a pivot shaft 96. The non-claw end of the clutch piece 95 is always biased outward by a spring 99 extending from a fixed point on the end face of the gear 33.
Therefore, the clutch pawl 95 tends to pivot clockwise (as viewed in FIG. 5) with respect to the pivot 96, and the clutch pawl 97
normally fits into the groove 92 of the clutch disc. In this case, the gear 33 and the cam 24 rotate by receiving the driving force from the impression cylinder, and therefore the paper feed belt 53 and the paper feed belt 36 are in operation.

Furthermore, the clutch piece is designed such that the clutch pawl can come out of the clutch recess groove due to an external action. The non-claw end of the pawl latch piece 95 on the opposite side of the spring 99 is a locking portion 98, and the locking portion 98 projects further outward from the outer periphery of the gear 33. On the other hand, an electromagnetic rod is fixedly provided with respect to the framework 11, and the ARK operating rod 101 is attached so as to be movable forward and backward. The actuation rod is also pivotally attached to one end of a bent rod 103 having a pivot 102, and the other end of the bent rod is a fork 104. A bearing 105 is provided through the frame 11, and a sliding rod 106 is fitted thereto as a slidable operating member, and a pin 10-7 implanted at the outer end of the rod 106 K so that it fits into the prong 104. In this example, when the electromagnet MgK is energized, the actuating rod 101 is pulled by the electromagnetic rod and enters the electromagnetic rod, turning the fork 104 of the bent rod 103 counterclockwise in FIG. The slider rods 106 are pulled outwardly with respect to the press frame. When the electricity to the electromagnetic rod is cut off, the actuating rod 101 is pushed by a spring (not shown) and moves in the direction of removal from the electromagnetic rod.
Accordingly, the bending rod 103 is pivoted clockwise as seen in FIG.

At this time, the movement of the tip of the sliding rod 106 is such that when the rod is pulled outward, the tip interferes with the passage of the locking portion 9B of the clutch piece 95. When it extends in the opposite direction, it interferes with the path of the locking portion 98 of the clutch piece.

Therefore, when the electromagnetic bar is energized and the slide bar 106 is pulled outward with respect to the framework, the clutch piece 95 pivots clockwise about the pivot 95 by the force of the spring 99, and the clutch pawl 9T moves toward the clutch circle. The paper feeding belt 53 and the paper feeding belt 36 are fitted into the clutch groove 92 of the plate and are operating.

When the electromagnetic rod is cut off and the sliding rod 1o6 extends inward with respect to the frame 11, the locking portion 98 of the clutch piece 95 comes into contact with the sliding rod 106, and the shift latch piece together with the gear 33 stops there, and at the same time, the clutch piece 95 stops there. 95 is a clutch pawl 97 of a clutch piece that rotates counterclockwise around a pivot 96.
is disengaged from the clutch groove 92, the clutch is disengaged, and the paper feed belt 53 and paper feed belt 36 are stopped. (5th
The figure shows a state in which the clutch is disengaged and the belt is stopped. ) The electromagnetic asbestos is controlled by a detection device 111 provided with respect to the paper feed belt 36. In this case, the detection device is used to determine whether one sheet (regular) or two or more sheets (irregular) are being fed, and a mechanical or electrical mechanism can be used as the mechanism.

The detection device 111 acts on the electromagnetic bar to hold the clutch in the "on" position when paper feeding is normal, and operates the paper feeding belt 53 and paper feeding belt 36, and when paper feeding is not normal, If it is normal, it will act on the electromagnetic rod to align the clutches mentioned above and 1. bring each of the belts mentioned above to a sudden stop.

In addition, a manual operation handle (not shown in the drawing) is provided in connection with the actuation rod 101 of the electromagnetic rod, and is used to manually operate the clutch, thereby stopping or operating the belt at the appropriate time. You can also have them do this.

By the way, the relationship between the manual disengagement operation of the clutch of the present invention, the drive of the paper feed belt, the paper feed belt, and the movement of the printing cylinder will be described. If the detection device 111 detects improper paper feeding, the detection device 111 issues a signal to disengage the clutch. At this time, one sliding rod 106 extends at a constant position relative to the circular path of the locking portion 98 of the clutch piece. Therefore, the engaging portion 98 of the clutch piece 95 always collides with the sliding rod 106 at a fixed position and is stopped, and at the same time, as described above, the clutch pawl 9T comes out of the clutch groove, the clutch is disconnected, and the belt is stopped (fifth figure). Therefore, when the paper feeding belt 53 and the paper feeding belt 36 stop, they always stop at a fixed position. This belt stop again
・When the printer stops, the paper that is ahead and is being fed normally is already partially inserted into the printing cylinder, so printing is done on this paper and the paper is ejected. It has become.

When the incorrect paper feeding is corrected, the sliding rod 106 is retracted from the clutch engagement part by the action of the detection device 111 and the electromagnet, and the clutch piece pivots toward the clutch groove 92 of the clutch disc by the action of the spring. be done. At this time, the pawl 9T of the clutch piece 95 may not fit into the clutch groove all the way, but may come into contact with the circumferential surface of the rotating clutch disk and slip.
The clutch pieces and clutch pawls maintain their previous stop positions. When the clutch concave groove of the clutch disk 91 rotating with the impression cylinder comes to the position of the clutch pawl that maintains this constant position, the clutch pawl 97 fits into the clutch concave groove 92, and the clutch is engaged here. The belt will begin to move. Therefore, the movement of the paper feed and the paper feed belt can always maintain a constant relationship with respect to the movement of the printing cylinder and the timing and position of printing the paper.

In this sense, this clutch can be called a fixed position clutch.

As described above, according to the paper feeding drive device of the present invention, paper can be conveniently fed when feeding seed paper from below and pushing the sheet with reference to the trailing edge. The drive device is also simple, convenient to use, and economical.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the internal structure of the entire printing press including the paper feed drive device of the present invention; Fig. 2 is a side view showing in particular the power transmission mechanism from the impression cylinder to the paper feeding belt drive mechanism; The figure is a partial side view of the paper feed drive device and shows the state of power transmission to the paper feed belt drive mechanism in percent. Figure 4 is an expanded plan view of the paper feed belt drive mechanism. FIG. 6 is a partial side view including the fixed position clutch, paper feed belt, and power transmission mechanism, showing a state in which the clutch is disengaged and the belt is stopped. FIG. 6 is an expanded plan view of FIG. 5. [Explanation of symbols of main parts] 10 Printing machine PO+ Pl * p, ... Sheet 13
Paper feeding belt drive mechanism 63 Pinion gear 64 One clutch 55 Belt axle 5T Belt wheel 53 Paper feeding endless rotating belt 12 Paper feeding belt driving mechanism 33 Gear 34 Intermediate gear 35 Belt shaft gear 42 Belt wheel 36 Paper feeding endless rotating belt 37 Projection on outer periphery 90 Clutch device 91 Latch disc 92 Clutch groove 33.24 Gear, cam 95 Clutch piece electromagnet

Claims (1)

[Claims] 1. A drive device for feeding sheets accumulated in a printing press one by one from below and sending them to a printing cylinder, which comprises a paper feeding belt drive mechanism and a paper feeding mechanism. a belt drive mechanism, and a stop device for the paper feed belt and the paper feed belt using a fixed position clutch, the drive mechanism for the paper feed belt being driven in synchronization with a power-driven printing press printing cylinder. This device receives driving force from the cam profile of an integral gear and cam included in a clutch device for connecting and disconnecting power provided with respect to a shaft, and this device receives driving force from the cam profile of the above-mentioned shaft that rotates in response to the driving force. a cam, a cam follower that engages with the cam, and a straight rod that engages at one end of the rod of the cam follower and transmits the rocking motion of the cam follower as a substantially linear reciprocating motion. and a rod connected to the other end of the straight rod, which has a segment gear at one end, and the segment gear is adapted to perform rocking motion, and the link mechanism is configured to provide power to the paper feeding belt. Further, a pinion gear incorporating a one-way clutch engages with a segment gear that swings in the link mechanism, and itself rotates reciprocatingly in two directions. A power-coupled pinion gear whose shaft rotates intermittently in one direction, a belt wheel installed on the shaft of the pinion gear and which rotates intermittently, and a paper feeder which is driven by the belt wheel and rotates intermittently. The paper feed belt drive mechanism is comprised of a clutch device for connecting and disconnecting power provided about a shaft driven synchronously with a printing cylinder of a power-driven printing press. an integral gear and cam that receives a driving force from the gear, the gear rotating in response to the driving force; and a belt shaft operatively engaging with the driving rotating gear via an intermediate gear. It consists of an upper gear, a belt pulley on the belt shaft, and a paper feed endless rotating belt having a protrusion on the outer periphery driven by the belt pulley, and a paper feeding belt driven by a fixed position clutch; The stopping position of the paper feed belt is determined by a clutch device for connecting and disconnecting the power, which is provided for the shaft driven in synchronization with the printing cylinder of the power-driven printing press, and the clutch device is a clutch disk having a clutch concave groove fixedly provided on a shaft driven by the gear; and a clutch disc having a clutch groove fixedly provided on the gear cam, which is rotatable with respect to the shaft driven synchronously by the integral gear and the cam; The gear has a clutch piece on the side of the clutch disk of the cam, and the clutch piece is biased so that the clutch pawl normally fits into the clutch groove on the clutch disk, and the clutch piece is externally The clutch pawl can be engaged and disengaged from the clutch recessed groove by the action of the clutch groove, and the clutch piece is connected to the clutch pawl by an electromagnet and related operating members provided on a fixed part such as the frame of the printing press. and a paper feed state detection device provided for the paper feed belt that controls the electromagnet and related components when the paper feed is normal. The clutch pawl is maintained in engagement with the clutch groove, and the power from the printing cylinder is therefore coupled to the paper feed belt and the paper feed belt to operate these belts, and the paper feed If this is incorrect, the electromagnetic and associated operating members are actuated to cause the clutch pawl to disengage from the clutch groove, thus disconnecting the power from the print cylinder from the paper feed belt and the paper feed belt, thereby disconnecting these belts. A sheet feeding drive device comprising: a stopper; and a stopper. 2. In the paper feed belt and paper feed belt stopping device using the fixed position clutch, the engagement and disengagement between the clutch pawl and the clutch groove are performed in the fixed position, Claim No. 2 1. Paper feeding drive device.