Plate Type Punching Machine

This invention relates to a plate type punching machine in which sheets of paper supplied to the machine are transferred one after the other intermittently to a punching die. The sheet formed with lines of cuts or folds by the punching die is placed on a board so that the cut sections or tailings are removed from the sheet by remover bars in bar frames movable vertically on both upper and lower sides of the board.

In order to effect proper removal of the cuttings from each sheet punched by a plate type punching machine, it is essential to correctly place on a board the punched sheet held by sheet holding pawls on endless chain belts supported on rails laid along both sides of the board. It is also necessary to adjust the mounted position of the board on its support for registering the holes in the board and remover bars with the locations of the tailings in the sheet, but as the rails of the endless chain belts are disposed on both sides of the board, it is impossible to draw out the board and the support sidewise of the machine. Therefore, such registration of the remover bars and board holes has been performed by manual adjustment of the board by a worker who entered a space inside the machine. Such board adjusting work was very troublesome and time-consuming.

An object of this invention is to provide a plate type punching machine designed to allow easy adjustment of the board, in which a mount carrying the board and its support is provided such that the end on one side thereof is movable about pivot means so as to allow easy draw-out of the board and its support to one side of the machine. The drawn-out board is adjusted at said side of the machine and set in position on its support, and after properly placing said support on its mount, the latter is again turned about the pivot means to bring it back to its original position.

Another object of this invention is to provide a plate type punching machine of the type described, in which the board support carried on its mount is locked during operation, but when the positional adjustment of the board is made, said support is unlocked so that it can be drawn out from the mount along with the board.

Still another object of this invention is to provide a punching machine of the type described, in which the ends of rods are pivotally joined to one side end of the mount, with the other ends of said rods being pivotally joined to corresponding eccentric shafts so that when said eccentric shafts revolve, the mount is accordingly turned about the other side end thereof and can be thereby drawn out to one side of the machine along with the board, with said board and the other side end of said mount being placed below the rails.

A further object of this invention is to provide a punching machine of the type described, in which a pair of remover bar frames carrying remover bars for tailings are provided above and below the assembly of the board, support and mount, said remover bar frames being so connected to each other as to be movable up and down. The remover bar frames are drawn out to one side of the machine to allow easy mounting and demounting of said remover bars in their frames as well as positional adjustment thereof.

Other objects will be understood from the following detailed description of the invention.

FIG. 2 is an enlarged side view of a board, support and mount assembly;

FIG. 3 is an enlarged side elevational view of the remover bar frames and said board, support and mount assembly;

FIG. 4 is an enlarged exploded perspective view of the board support, its mount, base and parts of the remover bar frames; and

FIG. 5 is an enlarged perspective view of a mechanism, including a handle, bevel gears and rods, for moving one side end of the mount vertically about the pins at the other side end thereof.

Referring to FIG. 1, there is shown a general diagrammatic illustration of a plate type punching machine. Reference numeral 1 indicates a fixed platen adapted to a down-facing frame member (not shown), and reference numeral 2 indicates a movable platen disposed in opposition to said fixed platen 1 for forming lines of cuts for punching in a sheet A placed between said two platens while held by sheet holding pawls on endless chain belts 5. Said movable platen 2 is moved vertically by a toggle mechanism 3.

F designates a machine frame in which said endless chain belts 5 are passed round chain wheels 8, 9 journalled to both internal sides of said machine frame and guide rolls (not shown). When said chain wheels 8, 9 are rotated in the direction of the arrow by a known intermittent driving means, the sheet held by the sheet holding pawls of pawl bars 6 provided transversely on said endless chain belts 5 is accordingly transferred and cut between the fixed and movable platens 1 and 2 by their cutting edges.

Numeral 7 indicates a sheet feeder. Each sheet A supplied from said sheet feeder 7 is held or gripped by the sheet holding pawls 6 opened and closed by the action of cam means (not shown) and then is transferred on the endless chain belts 5 passed round the chain wheels 8, 9 at both ends of the machine frame F (the chain wheels on the opposite side being not shown in the drawing), until said sheet reaches the position just below the fixed platen 1, whereat the sheet is stopped. Then the toggle 3 is operated by its driving means (not shown) to raise up the movable platen 2 and the lines of cuts for distinguishing between blank and waste portions are formed in the sheet A by a punching board 4. Then the toggle 3 is again operated to lower the movable block 2 and the chain wheels 8, 9 are rotated to drive the endless chain belts 5 to bring the sheet A formed with said cut lines to the position just above a board 15 between blocks 10 and 11 carrying remover bar frames 12a and 14a and locked in position by locks 37, 37a and 38, 38a, and upon reaching this position, the endless chain belts 5 are stopped.

Levers 29, 29a are joined at one end to the block 10 to which the remover bar frame 12a is mounted so as to be movable out of or into one side of the machine frame F, with the other ends of said respective levers 29, 29a being joined to the corresponding ends of the cranks 31, 31a pivoted at 30, 30a to the machine frame F. Said cranks 31, 31a are also pivotally joined to both ends of a connecting rod 32, and a lever 33 is joined to the other end of said crank 31a, whereby said both cranks 31 and 31a are operated simultaneously by pulling or pushing said lever 33 to thereby raise up or lower down the block 10. Likewise, levers 34, 34a are joined at one end to the block 11 mounted with the remover bar frame 14a so as to be movable out of or into one side of the machine frame F, with the other ends of said respective levers 34, 34a being joined to the corresponding ends of the cranks 36, 36a which are pivoted at 35, 35a to the machine frame F. The other ends of said cranks 36, 36a are connected by a connecting rod (not shown), and an operating bar of said crank 36a is connected to said lever 33 by a connecting rod (not shown) so as to interlock said both blocks 10 and 11. Thus, the tailings in the sheet A resting on the board 15 are removed by the remover bars 12, 14 set in the respective remover bar frames 12a, 14a, in synchronized operative relation with the endless chain belt driving wheels 8, 9 and gearing mechanism (not shown).

Also, locking and unlocking members 37, 37a and 38, 38a are provided for the respective blocks 10 and 11, whereby when the tailings removing operation is performed, the remover bar frames 12a, 14a are locked to the respective blocks 10, 11, and when said frames 12a, 14a are drawn out sidewise of the machine frame F for setting the remover bars 12, 14 in the frames 12a, 14a or for repair, said frames 12a, 14a are unlocked from the blocks 10, 11.

The board 15 is disposed between and parallel to the rails 28 and 28a and secured by screws or other means to the fixtures 16 adapted to the cross bars 17a of the support 17 so as to be movable or fixed. Numeral 18 denotes the mount on which the support 17 is mounted such that said support may be drawn out to one side of the frame F. One side 18b of said mount is pivotally joined to the machine frame F by pins 19, while rods 22, 22a are joined at one end by the other side 18a of said mount by pins 21, with the other ends of said respective bars 22, 22a being connected to the eccentric shafts 24, 24a pivotally secured to the machine frame F and connected to a bevel gear 23 which is meshed with another bevel gear 25 secured to a shaft 26 pivotally adapted to the machine frame F and joined at its other end to a handle 27.

When the handle 27 is turned clockwise or counterclockwise, the bevel gears 25, 23 are accordingly turned to revolve the eccentric shafts 24, 24a, causing the rods 22, 22a to move upwardly or downwardly. Thus, when the rods 22, 22a are moved upwardly, the mount 18 is turned about the pins 19 so as to maintain the board surface horizontal, while when said rods 22, 22a are moved downwardly, one side of the mount 18 is accordingly slanted downwards to have one side of the board 15 positioned below the rail 28. It is also possible to properly set the board 15 on the support 17 or to make microadjustment of its position on the support 17 by drawing out the board 15 with the support 17 to one side of the machine frame by pulling a catch 15a. In this case, of course the locking means 20, 20a on one side of the support 17 are released.

As described above, the board support 17 is itself supported on a mount 18 such that it may be moved sidewise of the machine frame or returned to its original position and locked, and one side of said mount 18 is pivotally joined to the frame F by pins 19 while the other side of said mount is joined to the rods 22, 22a which are in turn connected to the eccentric shafts 24, 24a so that when said eccentric shafts 24, 24a are rotated, said other side of the mount is turned downwardly about the pins 19, with one side of the board 15 being positioned below the rail 28a, thus allowing easy mounting or adjustment of the mounted position of the board 15 on the support 17. Also, when the support 17 is drawn out from the mount 18, both upper and lower portions of said mount are opened out, so that the positional adjustment of the remover bars 12, 14 in the remover bar frames 12a, 14a can be made with ease. It is also possible to draw out the remover bar frames 12a, 14a to one side of the machine frame F by unfastening the locks 37, 37a and 38, 38a of the blocks 10 and 11, allowing easy and quick mounting and positional adjustment of the remover bars 12, 14 in the respective frames 12a, 14a.