JPH0634945U - Swing device for sheet-fed printing press - Google Patents

Abstract

(57) [Summary] [Purpose] At the time of high-speed printing, the nail closing stop was made in time and the impact force at the time of stop was relaxed. [Structure] The swing lever 3 for rotating the pawl opening / closing cam 2 is stopped by bringing a stopper 12 at the tip of the lever 3 into contact with a stopper 12 at the tip of an arm 4 that operates by detecting an illegal sheet. A large gap 13 is provided between the stoppers 11 and 12 to increase the time margin until the claw closing is stopped. A buffer member 15 is provided on the stopper 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a swing device for a sheet-fed printing press.

[0002]

[Prior art]

 The paper stacked on the paper stack of the sheet-fed printing press is sent out one by one by the sucker device of the paper feed section, and after the position of the paper is regulated in the foreground, it is received by the swing device to the paper transport cylinder. Passed. Printing is performed by passing the paper between the impression cylinder and the blanket cylinder from the paper transport cylinder. When the position of the paper is regulated in the front end, if the front, rear, left and right positions are not accurately performed (illegal paper), the detector stops the paper delivery to the paper transport cylinder by the swing device.

As shown in FIG. 4, this swing device includes a claw opening / closing cam 2 attached to a swing shaft 1, a swing lever 3 for rotating the claw opening / closing cam 2 and opening / closing the claw, and the swing lever. 3, a pawl opening / closing cam 2 is connected to a rocking lever 3 by a link 5, and the rocking lever 3 is connected to a timing cam 6 for opening / closing a rocking pawl via a cam follower 7. The spring 4 and the solenoid 10 keep the arm 4 from colliding with the swing lever 3 at all times, and when a wrong sheet is generated, the detector detects it. The solenoid 10 is actuated by a signal from the arm 4 and the arm 4 moves to a position where it collides with the swing lever 3, causing the stopper 11 provided at the tip of the swing lever 3 to collide with the stopper 11 provided at the tip of the arm 4. Shaken by The moving lever 3 is regulated to stop the claw closing of the swing.

[0004]

[Problems to be solved by the device]

 However, the time margin from the detection of illegal paper to the time when the swing claw can be stopped is extremely short, the conventional method cannot catch the claw close during high-speed printing, and the swing device stops the delivery of the illegal paper (swing claw close). At the time of (stop), the stopper at the tip of the swing lever and the stopper at the end of the arm collide with each other at a high speed, which causes a large impact force and is easily broken.

The present invention has been developed to address such a problem, and aims to reduce the impact force at the time of collision while providing a time margin for collision between the stoppers.

[0006]

[Means for Solving the Problems]

 The structure of the present invention for achieving the above-mentioned object will be described with reference to FIGS. 1 to 3 corresponding to the embodiments. The present invention includes a pawl opening / closing cam 2 mounted on a swing shaft 1 and the pawl opening / closing cam 2. In a swing device of a sheet-fed printing press provided with a swing lever 3 for rotating and opening and closing a claw, and an arm 4 for stopping swing of the swing lever 3, a tip stopper 12 of the swing lever 3 is provided. A large gap 13 is provided between the tip end stopper 11 of the arm 4 to increase the time margin until the claw closing is stopped, and the stopper 12 is provided with an impact when the swing lever 3 and the arm 4 collide. It is characterized in that a cushioning member 15 is provided for alleviating.

[0007]

[Action]

 According to the present invention, the above-mentioned means rotates the pawl opening / closing cam in the normal paper-feeding state.The stopper of the swing lever does not come into contact with the stopper of the arm tip, and the swing pawl does not contact the paper at the front part. Although the paper is passed to the bite delivery cylinder, if incorrect paper is detected at the front part, the stoppers collide with each other to stop the movement of the nails before the binding of the nails is completed, and here the gap between the stoppers is increased. By doing so, the time required for the stoppers to collide with each other becomes longer and a time margin is created, and this time margin increases the impact load at the time of collision, but this increase in impact load is caused by the buffer member provided in the stopper. Relieve impact force.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In the drawings, reference numerals 1 to 12 denote the same parts as those of the conventional example shown in FIG. To do. In the present invention, the gap 13 between the tip stopper 12 of the swing lever 3 and the tip stopper 11 of the arm 4 is made as wide as possible in terms of timing to increase the time until the stoppers collide with each other, and The time required to rotate the stopper bolt 14 to the position is set to be almost constant, and the permissible time from the detection of illegal paper to the stop of paper conveyance is increased, and the illegal paper can be stopped during high-speed printing.

The stopper 12 of the swing lever 3 is attached to the swing lever 3 via a cushioning member 15, such as a cushion comb, a disc spring, and an oil typer. Thus, when the swing claw opening / closing cam 2 is rotated by the swing lever 3 via the link 5, the swing claw closes the pawl at the front position and bites the paper, and the swing that bit the paper swings the delivery cylinder. Although the paper is conveyed to the front side, when the illegal paper is detected in the front contact, the solenoid 10 is activated to rotate the arm 4, and at this time, the tip stopper 12 of the swing lever 3 moves to the outside of the tip stopper 11 of the arch 4. If so, the arm 4 rotates until it hits the stopper bolt 14, and the tip stopper 11 of the arm and the tip stopper 12 of the rocking lever collide with each other, whereby the rocking of the rocking lever 3 is restricted and the conveyance of the paper is stopped.

[0010]

[Effect of device]

 As described above, according to the present invention, there is a time margin until the pawl closing is stopped between the tip stopper of the swing lever that rotates the pawl opening / closing cam and the tip stopper of the arm that stops the swing of the pivot lever. Since a large gap that increases the number of sheets is provided, it is possible to reliably stop the conveyance of illegal paper even during high-speed printing, and the stopper is a cushioning member that reduces the impact at the time of the collision between the swing lever and the arm. Since this is provided, it has an effect such that even during high-speed printing, illegal paper conveyance can be stopped without disturbing the printing press.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an operation explanatory view of a stopper.

FIG. 3 is an operation explanatory view of a stopper.

FIG. 4 is a side view showing a conventional example.

[Explanation of symbols]

 1 Swing shaft 2 Claw open / close cam 3 Swing lever 4 Arm 11 Stopper 12 Stopper 13 Gap 15 Buffer member

Claims (1)

[Scope of utility model registration request] 1. A sheet-fed printing press comprising a claw opening / closing cam attached to a swing shaft, a swing lever for rotating the claw opening / closing cam and opening / closing the claw, and an arm for stopping swing of the swing lever. In the swing device, a large gap is provided between the tip stopper of the rocking lever and the tip stopper of the arm to increase the time margin until the claw closing is stopped. A swing device for a sheet-fed printing press, comprising a cushioning member for cushioning an impact at the time of collision with an arm.