JPS6119172Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a former movement mechanism for a rotary printing press, and more specifically to a back and forth movement mechanism.

In rotary printing presses, the web width may vary depending on the signatures, sheets, etc. discharged by the folding machine, so when the web is folded and introduced into the folding cylinder, there is a movement mechanism in the former depending on the web width. It is convenient.

An outline of a former moving mechanism in a conventional rotary printing press will be explained with reference to FIG. In FIG. 1, 5 is a folding introduction frame, 6 is a moving frame movably attached to the upper part of the folding introduction frame 5, and the frame 6 is a bearing 7 fixed to the folding introduction frame 5.
It is screwed to a screw shaft 8 which is screwed into the screw shaft 8. Therefore, when the screw shaft 8 rotates, the movable frame 6 moves left and right in the figure. A drag roller 9 is rotatably supported by the movable frame 6, and the roller 9 is rotated by a drive source 11 attached to the folding introduction frame via a timing belt 10. Reference numeral 12 denotes a former that is supported diagonally with its tip facing down, the base of which is pivotally supported by a bracket 13 fixed to the movable frame 6 and close to the drag roller 9, and the tip side of which is a former that adjusts the inclination of the former 12. It is attached to the angle adjustment mechanism 14.

15 is a stay 16 fixed to the folding introduction frame 5
A moving shaft slidably supported by the moving shaft 15.
is attached to the former angle adjustment mechanism 14 on one side, and screwed onto the screw shaft 17 on the other side. 18 and 19 are sprockets attached to the screw shafts 8 and 17; a chain 20 is wound around these sprockets 18 and 19;
1, the movable frame 6 which pivotally supports the drag roller 9 via the screw shafts 8 and 17 and the former 12 move together in the width direction of the web (left and right in the figure). .

In the former movement mechanism with such a structure, the drag roller 9 and the former 12 move simultaneously, and even if the former 12 moves horizontally, the timing belt 10 wound around the drag roller 9 moves in the direction of the figure around the drive source 11. Since the range of movement amount is moved on an arc, Dratsu Glora 9
Since the distance between the centers of the drive source 11 changes slightly, the backlash of the timing belt 10 and timing pulley (not shown) becomes larger than necessary, and the drag roller 9 does not rotate smoothly, resulting in poor web folding accuracy.

Furthermore, when the drag roller 9 moves, a portion of the drive source 11 that drives the roller 9 also moves, making the structure complicated and maintenance and inspection difficult.

The present invention was developed in consideration of these points.
The purpose of this invention is to provide a moving mechanism for a rotary printing press that moves a former while fixing a drag roller and a drive source for driving the roller.

Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings. 2 and 3 are schematic structural diagrams showing an embodiment of the present invention, in which the same functions as those in FIG. 1 are denoted by the same reference numerals, and the explanation thereof will be omitted. Reference numeral 25 denotes a roller located close to the base of the former 12. The roller 25 is loosely fitted and guided by an arm 27 that is pivotally supported by a bearing 26 of the drag roller 9 (see FIG. 3), and is mounted on the former stand 28. It is rotatably supported by a shaft 31 attached thereto. The former 12 has a tip inclined downward, a base thereof pivoted on a former stand 28, and a former angle adjustment mechanism 14 for adjusting the inclination of the former 12 at the center thereof. Note that the former stand 28 has folding machine frames 32a and 32b.
Since it is guided by a guide shaft 29 fixed to the handle 21 and screwed onto the threaded shaft 17, the handle 21 can be rotated to move left and right in the figure. A guide plate 30 closes the gap between the drag roller 9 and the roller 25 to prevent the paper from sagging during threading, and is attached to the arm 27.

Since the present invention has such a structure, when the former is moved by the web, there is no need to move the drag roller and the drive source for driving the roller, so the movement of the former can be easily adjusted.

Furthermore, since the former is easily moved, the folding accuracy can be maintained uniformly regardless of the size of the web.

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram of a conventional former forward and backward movement mechanism, FIG. 2 is a schematic diagram showing an embodiment of the present invention, and FIG. 3 is a side view of FIG. 2. 5... Folding introduction frame, 6... Moving frame,
7, 26...bearing, 8...screw shaft, 9...drag roller, 10...timing belt, 11...
Drive source, 12... Former, 13... Bracket, 14... Former angle adjustment mechanism, 15... Movement axis, 16... Stay, 17... Screw shaft, 18,
19...Sprocket, 20...Chain, 21
... Handle, 25 ... Roller, 28 ... Former stand, 29 ... Guide shaft, 30 ... Guide plate, 3
1...Shaft, 32a, 32b...Folding machine frame.

Claims (1)

[Scope of utility model registration request] In the former movement mechanism, the drag roller is attached to a fixed position on the folding introduction frame and is screwed onto a guide shaft fixed to the folding machine frame so that it can move in the axial direction of the guide shaft. A former base that pivotally supports the base of the former tilting downward and a rotatable roller, and a former angle adjustment mechanism installed in the center thereof to adjust the inclination of the former, and one end of which is attached to the bearing part of the drag roller. an arm that is pivotally connected to the rotatable roller and has a guide plate on its surface, the other end of which loosely fits and guides the shaft of the rotatable roller; A forma movement mechanism for a rotary printing press characterized by parallel movement.