JP2823325B2 - Needle cam drive of folder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a needle cam driving device for a folder in a rotary printing press.

<Conventional Technology> In general, a folding machine can be switched between a case where two sheets are folded and a case where two sheets are not folded and used.

As a method of stacking two sheets, for example, there is a triple cylinder type. In this method, a needle cam for ejecting or retracting a needle for web transport provided on the cylinder is moved every 1/3 of the rotation of the cylinder. , Operation and non-operation must be repeated. As one method for this, conventionally, there has been a method in which the needle cam is driven to rotate at a rate of 1.5 rotations per rotation of the body.

<Problem to be Solved by the Invention> Incidentally, in the above-described needle cam driving device, a method of fixing the needle cam at a predetermined position is effective for switching so as not to overlap two sheets.

However, conventionally, in order to fix and position the needle cam, the operation of disconnecting the needle cam from the driving source and the operation of fixing and positioning the needle cam at a predetermined position are manually and individually performed. There is a problem that it takes.

Therefore, an object of the present invention is to provide a needle cam driving device that can easily and quickly perform fixed positioning of the needle cam.

<Means for Solving the Problems> According to a configuration of the present invention for achieving the above object, a drive system for a needle cam is branched from a drive system for a needle barrel via an electromagnetic clutch, and a connection / disconnection operation of the electromagnetic clutch is performed. A mechanical stopper mechanism is provided which is capable of fixing and positioning the needle cam at a predetermined position when the clutch is disengaged synchronously.

<Operation> According to the above configuration, the needle cam is automatically fixed to the predetermined position by the stopper mechanism when the clutch is disconnected by remote control.

<Embodiment> An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show an embodiment of a needle cam driving device according to the present invention. FIG. 1 is an exploded sectional view of a cutting cylinder portion in which the needle cam driving device is implemented. FIG. 2 is a side view. It is a detailed view of a part.

In the figure, both shaft ends 3a, 3b of a cutting cylinder 3 are rotatably supported on bearing metals 2, 2 fitted to left and right frames 1, 1, respectively.

On the outer peripheral portion of the cutting cylinder 3, camshafts 4 are swingably supported at three locations at equal intervals of 120 degrees, and a large number of needles 5 are fixed to these camshafts 4. A cam follower 7 with a roller 6 is fixedly provided at an end of the camshaft 4 on the driving side.

A shaft end 3b on the driving side of the cutting cylinder 3 protrudes out of the frame 1, and a main input gear 8a and a sub input gear 8b integrated with the main input gear 8a are provided at the protruding end thereof via a support member 9. It is fixed. A connecting cylinder 10 is interposed between the outer periphery of the shaft end 3b and the bearing metal 2, and a needle that engages with the cam follower 7 via a support member 11 at an inner end of the connecting cylinder 10. A driving plate cam 12 is fixedly provided. On the other hand, connecting tube
A cam gear 13 is fixedly provided at the outer end of 10.

A support plate 15 is fixed on the outer surface of the driving side frame 1 with bolts 16 at a predetermined interval, and a drive shaft 17 is provided between the support plate 15 and the frame 1 via bearings 18a and 18b. It is installed rotatably.

Near the frame of the drive shaft 17, the cam gear
An intermediate gear 19 meshing with the gear 13 and having the same number of teeth as the gear 13 is fixedly provided, and a cam meshing with the sub input gear 8b and having a smaller number of teeth than the gear 8b is provided at an intermediate portion of the drive shaft. A drive gear 20 is rotatably supported via a support member 21 and a bearing 22. Further, an electromagnetic clutch 23 is provided around the drive shaft 17 near the support plate 15, and when energized by operating a button of an operation box (not shown), the rotation of the cam drive gear 20 is transmitted to the drive shaft 17 and conversely When is stopped, the rotation is not transmitted.

A circular boss 25 is integrally formed on the inner surface of the cam gear 13, and a U-shaped notch 26 is formed on the outer periphery of the boss 25.
Are formed together with the guide surface 27. In consideration of durability, it is preferable that the notch 26 is formed of a separate durable member and connected to the cam gear 13 with a bolt 28 as shown in the example of the drawing.

On the other hand, a stopper roller 29 which fits into the notch 26 to fix and position the plate cam 12 at a predetermined position is attached to the upper end of a lever 30 whose intermediate portion is pivotally supported on the outer surface of the driving frame 1. . The distal end of the piston rod 31a of the air cylinder 31 pivotally supported by the frame 1 at the base end is pin-connected to the lower end of the lever 30.

The air cylinder 31 is operated in synchronization with the electromagnetic clutch 23 described above. When the electromagnetic clutch 23 is energized, the air cylinder 31 contracts and separates the stopper roller 29 from the boss portion 25. The boss 25 is brought into contact with the outer periphery.

 In FIG. 2, reference numeral 35 denotes a folding cylinder gear.

With this configuration, when the button in the operation box is turned on and the electromagnetic clutch 23 is energized, the air cylinder 31 contracts and the stopper roller 29 separates from the notch 26 in synchronization with this.

Thus, the rotational force of the cam drive gear 20 driven from the main input gear 8a via the sub input gear 8b is transmitted to the cam gear 13 via the drive shaft 17 and the intermediate gear 19 by the connection of the electromagnetic clutch 23.

As a result, the plate cam 12 integrated with the cam gear 13 is rotated at a rate of 1.5 rotations per rotation of the cutting cylinder 3, and the operation and non-operation are repeated every time the cutting cylinder 3 rotates 1/3. Thus, the folding operation of two sheets is performed.

On the other hand, when switching to the folding operation in which two sheets are not stacked, the above-described button may be turned off and the energization to the electromagnetic clutch 23 may be stopped in a state where the machine is in a slow motion state.

As a result, the plate cam 12 loses its drive source when the electromagnetic clutch 23 is disconnected, and stops temporarily. However, since the roller 6 of the cam follower 7 and the lift surface of the plate cam 12 eventually engage, the plate cam 12 is cut. It is hung around the torso 3.

At this time, the stopper roller 29 is automatically rolled when the plate cam 12 comes to a predetermined position because the stopper roller 29 is rolled in contact with the outer periphery of the boss 25 by the extension operation of the air cylinder 31 when the button is turned off. It fits inside the notch 26.

As a result, the plate cam 12 is fixedly positioned at a predetermined position,
Each time the cutting cylinder 3 rotates 1 /, a folding operation is performed in which two sheets are not overlapped.

In the above embodiment, the description is limited to the fixed positioning of the needle cam at the time of switching the folding specification, but in the present invention, in addition to the switching of the folding specification, at the time of replacement of the needle, the needle protrudes at an easily replaceable position. The present invention is also applicable to a case where the needle cam is fixedly positioned at a predetermined position. At this time, if the fixed positions of the needle change and the folding specification change are different, the aforementioned stopper roller 29, the lever 30 for moving the stopper roller 29, and the air cylinder 31 are connected to the boss 2
Another set of needle replacement may be provided at predetermined positions around the needle.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications such as a stopper mechanism can be made without departing from the gist of the present invention.

<Effects of the Invention> As described above, according to the present invention, a stopper mechanism for fixing and positioning the needle cam at a predetermined position in synchronization with the disconnection operation of the electromagnetic clutch is provided. Thus, the effect that the fixing and positioning of the needle cam can be automatically performed by remote control.

[Brief description of the drawings]

1 to 3 show an embodiment of a needle cam drive device according to the present invention. FIG. 1 is an exploded cross-sectional view of a cutting cylinder unit in which the needle cam drive device is implemented, FIG. 2 is a side view, and FIG. FIG. In the drawing, 3 is a cutting cylinder, 5 is a needle, 7 is a cam follower,
8a is a main input gear, 12 is a plate cam, 13 is a cam gear, 20 is a cam drive gear, 23 is an electromagnetic clutch, 25 is a boss, 26 is a notch, 29 is a stopper roller, and 31 is an air cylinder.

Claims (1)

(57) [Claims] 1. A driving system for a needle cam is branched from a driving system for a needle barrel via an electromagnetic clutch, and the needle cam is fixed at a predetermined position when the clutch is disconnected in synchronization with an on-off operation of the electromagnetic clutch. A needle cam driving device for a folding machine, comprising a mechanical stopper mechanism capable of positioning.