JPH0476785B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ink fountain device for a printing press that has an improved part for adjusting the amount of advance and retreat of an ink key.

[Conventional technology]

Conventionally, this type of ink fountain device includes a moving pusher that is moved forward and backward by an electric motor or an operating knob, a fulcrum holder that is moved forward and backward manually, and a moving pusher that is provided between the inner ends of the fulcrum holder and has a proximal end. The lower idle ring, which is supported on the inner end of the fulcrum holder so that it can swing freely by a support shaft, and which is supported on the free end of the fulcrum holder, is moved by a guide pusher using a spring. an eccentric wheel integrally provided at the upper end of the link centered on a point eccentric to;
An upper idle ring is attached to the eccentric ring, and the upper idle ring is displaced by the oscillation of the link due to the forward and backward movement of the movable pushwheel, and the fulcrum of the link is moved by the cam-like operation of the upper idle ring and the forward and backward movement of the fulcrum holder. Japanese Patent Laid-Open No. 60-178056 discloses an ink key in which the amount of advance and retreat of an ink key can be finely adjusted.

[Problem that the invention seeks to solve]

In the conventional device described above, the lower idle ring of the link moves up and down with respect to the center line of the moving pusher and the center line of the guide pusher, so the angle at which the moving force of the moving pusher acts on the lower idle ring and the angle of the guide pusher The angle at which the return force acts on the lower idler wheel changes each time the adjustment operation is performed, and as a result, the load on the electric motor or operating knob when moving the moving pusher forward or backward increases or decreases depending on the adjustment position. Not only does the variation lead to poor operating comfort, but also the need to find the optimal position with the least variation during production and assembly to obtain a good product, which makes production and assembly time-consuming. Since the configuration uses a spring to obtain the return force and the debatch removal force, the spring must be large to some extent, and the force of the spring always acts on the moving pusher as a load, so when the moving pusher moves forward and backward, There was a large difference in the operating force applied to the same moving push button, making it difficult to use.

[Means for solving problems]

SUMMARY OF THE INVENTION An object of the present invention is to provide an ink fountain device that solves the above problems by using a rack instead of a moving pusher and a spring-loaded guide pusher, and a gear (with missing teeth) instead of a link. It is.

〔Example〕

In the embodiment shown in the figure, the front side is the ink source roller 1.
The left and right sides are surrounded by a pair of ink dams 2 and 2', the rear and bottom sides are surrounded by an inclined bottom plate 3, and ink is distributed between the front edge of the bottom plate 3 and the outer peripheral surface of the ink source roller 1. A funnel-shaped ink fountain 5 with a delivery slit 4 is formed, and the ink delivery slit 4 is placed on the underside of the bottom plate 3, crossing the lower surface of the ink delivery slit 4 in close contact with the front edge of the bottom plate 3, and forming an ink source roller 1. A base plate section on which a large number of ink keys 6 are placed so as to be able to move toward the outer circumferential surface in a state in which the ink keys 6 can be moved near and far and in contact with each other; 7, and in the base part 7, a fulcrum holder 8 that moves forward and backward, and a rack 9 that moves forward and backward in the same manner as the base plate 7, are installed in an up-and-down arrangement and are non-rotatable. A partially toothed gear 10 is rotatably supported on the front end of the holder 8 by a support shaft 11, and the teeth of the partially toothed gear 10 and the teeth of the rack 9 are in mesh with each other. 12 is integrally fitted with an eccentric wheel 13 which is freely rotatable, and a spring 14 is attached to each ink key 6 to constantly press the rear end surface of the ink key 6 against the outer periphery of the idler wheel 12.
is engaged through the spring receiver 15, and female screws 17 and 18 are drilled in the rear ends of the fulcrum holder 8 and the rack 9, and a zero point adjustment screw shaft 19 and a fine The front ends of the adjustment screw shafts 20 are screwed together, and these screw shafts 19 and 20 are fixed to the mounting plates 21 and 22 fixed to the base plate 7 through flanges 24 and 25, so that they cannot move forward or backward but are rotatable. A driver groove 26 is provided at the outer end of the screw shaft 19 for zero point adjustment, and a force receiving gear 27 is fixed non-rotatably to the outer end of the screw shaft 20 for fine adjustment. A downward projecting portion 28 is provided at the rear end of 7, and a motor 29 and a potentiometer 30 are fixed to this projecting portion 28 in a vertical arrangement. A first gear 32 and a second gear 33 that mesh with each other via a first transmission gear 31 are fixed in a non-rotatable manner, and the first gear 32 and the force-receiving gear 27 are connected via a second transmission gear 34. be.

In the figure, reference numeral 36 denotes a backlash removal spring, 37, which exists between the teeth of the partially toothed gear 9 and the teeth of the rack 9, and between the female screw 18 of the rack 9 and the screw shaft 20 for fine adjustment. 38 is ink key 6
Reference numeral 40 indicates a mounting portion of the magnet 39, which enhances the adhesion between the upper surface and the lower surface of the bottom plate 3.

[Effect]

The present invention comprises: a fulcrum holder that is installed behind each ink key and is moved forward and backward manually or electrically; a rack that is installed below the fulcrum holder and that is moved forward and backward electrically or manually; a gear rotatably supported by a support shaft at the front end of the gear and having teeth meshed with the teeth of the rack; an eccentric ring slightly eccentric from the center of the support shaft provided on the gear; It is equipped with a freely mounted idler ring and a spring that always presses the rear end surface of the ink key attached to each ink key against the outer periphery of the idler ring, and is displaced by the rotation of the gear as the rack moves forward and backward. The amount of advance and retreat of the ink key is adjusted by the operation of the eccentric wheel and the movement of the fulcrum by the forward and backward movement of the fulcrum holder, so that the gear rotates as the rack moves forward and backward. However, the position at which the moving force of the rack acts on the same gear is constant, which eliminates the above-mentioned variations and the need to search for the optimum position with the least variation. Since this is not necessary, there is almost no difference between the operating force applied when moving the pusher forward and the operating force applied during the return movement (this is due to the presence of the spring for removing the backlash, etc.).

〔Effect of the invention〕

Since the present invention is as described above, it has excellent effects that can completely achieve the intended purpose.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the entire embodiment, FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a sectional view showing another embodiment. 1... Ink source roller, 2, 2'... Ink weir,
3... Bottom plate, 4... Slit, 5... Ink fountain, 6... Ink key, 7... Base plate, 8... Fulcrum holder, 9... Rack, 10... Intermittent gear, 11... Fulcrum shaft, 12... Idle ring, 13...Eccentric ring, 14...Spring, 15...Spring receiver, 17, 18...Female screw, 19
...Screw shaft for zero point adjustment, 20...Screw shaft for fine adjustment, 21, 22...Mounting plate, 2
4, 25...flange, 26...driver groove, 27
...force receiving gear, 28...projection, 29...motor, 30
...Potentiometer, 31...First transmission gear, 32
...First gear, 33...Second gear, 34...Second transmission gear, 36...Battery removal spring, 37, 38
...Key, 39...Magnet, 40...Mounting part.

Claims (1)

[Claims] 1 The front side is closed by an ink source roller, both left and right sides are closed by an ink weir, and the rear and bottom surfaces are closed by an inclined bottom plate, and an ink delivery slit is closed between the outer peripheral surface of the ink source roller and the front edge of the bottom plate. In addition, a large number of ink keys are placed on the underside of the bottom plate, and the ink keys are moved in close contact with the front edge of the bottom plate to cross the bottom surface of the ink delivery slit and move forward and backward toward and in contact with the outer peripheral surface of the ink source roller. In the ink fountain device of a printing press that has ink fountains arranged side by side on the base plate, the lower part of the fulcrum holder is installed behind each ink key and is moved forward and backward manually or electrically. a gear mounted on the rack and moved forward and backward electrically or manually; a gear rotatably supported by a support shaft on the front end of the fulcrum holder and having teeth meshed with the teeth of the rack; The eccentric ring is slightly eccentric from the center of the spindle, the idler ring is attached to the eccentric wheel so that it can freely rotate, and the rear end surface of the ink key attached to each ink key is always pressed against the outer periphery of the idler ring. The amount of advance and retreat of the ink key is adjusted by the actuation of an eccentric wheel which is displaced by the rotation of the gear caused by the forward and backward movement of the rack, and by the movement of the fulcrum by the forward and backward movement of the fulcrum holder. An ink fountain device for a printing press, characterized by: