JPH0569709B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink fountain key device for a printing press that allows fine adjustment with a manual knob with a counter and zero point adjustment with a manual knob with a scale.

Conventionally, for example, in Japanese Patent Application Laid-open No. 57-138948,
A screw rod that uses an electric motor as a drive source to move forward and backward toward the circumferential surface of the pot roller, a swingable lever whose lower end contacts the inner end of the screw rod, an eccentric pin with a fulcrum fixed at the upper end of the lever, and An ink fountain key device is described which comprises a roller (numerals 48 and 50 in the publication) and a split blade in contact with the roller. (Hereinafter referred to as the first conventional example.) Furthermore, in Japanese Patent Application Laid-Open No. 58-59844, a pot key is rotatably attached to the middle of a lever whose upper end is a pivot point and which is rotatably driven by a lower end. A device is described in which the position of the ink fountain key can be adjusted and the pivot point at the upper end of the lever can be freely adjusted and moved in the direction of movement of the ink fountain key. (Hereinafter referred to as the second conventional example.) Furthermore, Japanese Patent Application Laid-Open No. 58-219064 discloses a structure in which the engagement between the screw shaft for fine adjustment and the counter is released by a clutch, and the zero point adjustment is performed in this released state. things are listed. (Hereinafter referred to as the third prior art example.) The zero point position setting operation must be performed at the time of initial initial setting by the driver and when the ink fountain key and the ink roller have changed due to wear or other reasons.

In the first conventional example mentioned above, the potentiometer is held at the zero position with one hand so as not to rotate, and the meshing angle with the connecting gear is adjusted using the fine adjustment knob (numeral 36 in the publication) with the other hand. Since zero point adjustment is done by adjusting changes based on experience, the operation is cumbersome, and when making extremely small adjustments, it is difficult to time the start or stop of the motor, which requires a high degree of skill. . Further, since there is a reduction motor with a large reduction ratio between the potentiometer and the potentiometer, there is a large resistance, so it is not easy to rotate the fine adjustment knob. Furthermore, since the fulcrums of the eccentric pin and roller are fixed by the bracket and cannot be adjusted in the direction of movement of the ink fountain key, once the positions of the eccentric pin and roller are set during assembly, Readjustment cannot be done without disassembling it, making readjustment difficult.

As a means for solving this difficulty, a structure (hereinafter referred to as a solution means) having a coarse adjustment mechanism in which the pivot point at the upper end of the lever can be freely adjusted and moved in the direction of movement of the ink fountain key as in the second conventional example is proposed. ) can be applied to the first conventional example.

As a specific example of this solution, the above-mentioned Japanese Patent Application Laid-open No. 58
JP-A-59844 discloses two examples having the following coarse adjustment mechanisms. That is, in an ink fountain device in which the position of the fountain key is adjusted by rotatably attaching the fountain key to the middle of a lever whose upper end is the rotational fulcrum and whose lower end is rotationally driven, the rotational fulcrum at the upper end of the lever is Adjustment movement is performed using support rollers (numeral 16 in the same publication) consisting of a small diameter part, a large diameter part, and an upward slope part and a downward slope part that connect the small and large diameter parts with a gentle curve. The rotating operation of the supporting rollers is performed using a detachable handle (numeral 18 in the same publication), and the rotating position of the supporting rollers obtained by operating the handle is fixed using a fixing screw ( In the same bulletin, code 1
9) to hold the cover (in the same publication,
A format with code 25) (hereinafter referred to as A format),
In addition, in an ink fountain device in which the position of the fountain key is adjusted by attaching the fountain key rotatably in the middle of a lever whose upper end is the rotational fulcrum and whose lower end is rotationally driven, the rotational fulcrum at the upper end of the lever is , a type (hereinafter referred to as type B) with a cover (number 25 in the same publication) that can be adjusted and moved by an adjustment screw (number 16A in the same publication).

When the above-mentioned format A is adopted, there are the following deficiencies.

A1 When rotating the support roller using the handle, the handle feels heavy when moving uphill, and feels light when moving downhill, resulting in poor operability.

A2 If the operator forgets to tighten the fixing screw or intentionally does not tighten it because it takes time to attach and remove the cover, the support rollers may be damaged due to the return force of the ink fountain key's return spring or external vibrations. There is a risk that the setting value may become incorrect due to natural rotation.

A3 When the contact point of the upper end of the lever with the circumferential surface of the support roller changes due to the rotation of the support roller, the distance from the center of rotation to the contact point changes as the rotation angle changes, causing the ink fountain key to change. The amount of movement is not directly proportional to the rotation angle of the support roller, making it difficult to provide a scale.

A4 The handle for operating the support rollers is removed when not in use, so there is a risk of powder being lost.

Furthermore, when adopting the B format, there are the following deficiencies.

B1 The tip of the adjustment screw is easily crushed.

B2 If you are not familiar with the peculiarities of the adjustment screw, it may be difficult to use.

B3 It is necessary to perform the adjustment operation using the protrusion of the adjustment screw head as a guide, and the results of the adjustment tend to vary.

A screwdriver is required to operate the B4 adjustment screw,
It is a hassle for the operator to have to carry it at all times.

The configuration in which the fine adjustment threaded rod for swinging the lever in the above-mentioned first conventional example is electrically operated is the manual cam (reference numeral 21 in the same publication) in the above-mentioned second conventional example (hereinafter referred to as an alternative means). be able to.

However, when this alternative method is adopted, the manual cam consists of a small diameter part, a large diameter part, and an upslope part and a downslope part that connect the small and large diameter parts with a gentle curve. has the following flaws:

C1 When rotating a manual cam using the handle, the handle feels heavy when moving on an uphill slope, and feels light when moving on a downhill slope, resulting in poor operability.

C2 A mechanism is required to prevent the manual cam from rotating naturally due to vibrations received from the outside and causing the set value to go awry.

C3 When the contact point of the upper end of the lever with the circumferential surface of the manual cam changes as the manual cam rotates, the distance from the center of rotation to the contact point changes as the rotation angle changes, causing the ink fountain key to change. The amount of movement is not directly proportional to the rotation angle of the manual cam, making it difficult to provide a scale etc.

C4 It is suitable for showing the amount of fine adjustment with a bar scale, but it is not suitable for showing it with a rotating shaft counter.

Furthermore, in the third prior art example, a clutch is built in to enable zero point adjustment, so when adjusting the zero point, it is necessary to engage and disengage the clutch, which is cumbersome and requires a complicated structure of the clutch mechanism. is complicated.

The present invention allows the ink fountain key to be slightly moved back and forth regardless of the count on the counter 34 by rotating the zero point adjustment dial knob 33.
The object is to provide an ink fountain key device in a new printing press that does not have the defects of B4 and C1-C4.

In order to achieve the above object, the ink fountain key device in the printing press according to the present invention includes a fulcrum holder 13 provided at a position behind each ink fountain key 8 in the machine body 7 so as to be movable forward and backward but non-rotatable.
, a female screw 26 drilled in the rear end surface of the fulcrum holder 13, a screw shaft 28 for zero point adjustment whose front end is screwed to the female screw 26 and is supported on the fuselage 7 so as to be rotatable and unable to move forward or backward; A zero point adjustment dial knob 33 with a scale is fixed at the rear end of the adjustment screw shaft 28 by protruding from the body 7, and a dial knob 33 for adjusting the zero point with a scale is fixed to the rear end of the adjustment screw shaft 28. An adjustment body 14 provided to be able to move forward and backward, a female screw 27 drilled in the rear end surface of the adjustment body 14, and a fine adjustment screwed into the female screw 27 and supported on the body 7 so as to be rotatable and non-moveable forward and backward. a screw shaft 29 for fine adjustment, a dial knob 35 for fine adjustment with a counter 34 that protrudes the rear end of the screw shaft 29 for fine adjustment to the outside of the fuselage 7 and is fixed to the protrusion end, and a front end of the fulcrum holder 13. The adjustment body 14 is arranged vertically between the front ends of the adjustment body 14, and its base end is supported on the front end of the fulcrum holder 13 by a fulcrum shaft 17 so as to be swingable in the front and rear directions, and the free end is connected to the adjustment body via the first play ring 18. The outer periphery of the cam surface of the link 16, which is provided in a state in which it is always pressed against the front end surface of the link 14 by a spring 19, and the eccentric cam 22, which is provided in the proximal end of the link 16 in a state in which it rotates around the fulcrum shaft 17. A second idler ring 23 is rotatably fitted to the ink fountain key 18 and is supported on the rear end of the ink fountain key 18 so as to be in constant pressure contact with the rear end of the ink fountain key 18.

Next, an embodiment of the present invention will be described with reference to the drawings.The ink fountain roll 1 is provided on the front surface, the left and right sides are provided with a pair of side blocks 2, 2', and the rear and bottom surfaces are provided with an inclined bottom plate 3. A funnel-shaped ink fountain 6 with an ink delivery slit 5 surrounding it and provided between the front edge 4 of the bottom plate 3 and the outer peripheral surface of the ink fountain roll 1 is constructed on the machine body 7, and the machine body 7 includes a plurality of ink fountain keys 8 whose tips cross the lower surface of the ink delivery slit 5 in close contact with the front edge of the bottom plate 3 and come into contact with the outer peripheral surface of the ink fountain roll 1; A base plate part 9 and a presser plate 10 are provided for holding the ink fountain key 8 in a state where it can be moved from above and below in terms of distance and contact, and the presser plate 10 and the above-mentioned bottom plate 3 are integrated, and the body 7 At the rear of each ink fountain key 8, there is a fulcrum holder 13 that moves forward and backward, and an adjustment body 1 that moves forward and backward.
4 and 4 are unrotatable by a key 15 or the like and are arranged in an upper and lower arrangement, and these fulcrum holder 13 and adjustment body 14
A link 16 is arranged vertically between the front ends of the link 16, and the base end of the link 16 is supported on the fulcrum holder 13 by the fulcrum shaft 12 so as to be able to swing freely in the front and back direction, and the rear surface of the free end of the link 16 is supported by the adjusting body. A pusher 21 composed of a spring 19 and a guide bush 20 is always pressed against the front end surface of the link 14 via the first idler 18, and the upper end of the link 16 is centered at a point slightly eccentric from the center of the fulcrum shaft 17. An eccentric cam 22 is integrally provided, and this eccentric cam 22
A second idler ring 23 whose rear end surface of the ink fountain key 8 is always fitted onto the outer periphery of the cam surface of the eccentric cam 22 is attached to the cam surface of the eccentric cam 22.
A spring 24 is attached to the ink fountain key 8 via a spring receiver 25, and a female screw 2 is attached to the rear end of the fulcrum holder 13 and the adjustment body 14.
6 and 27, and screw the front ends of the zero point adjustment screw shaft 28 and the fine adjustment screw shaft 29 into these female screws 26 and 27, and screw each of these screw shafts 28 and 29 into the above-mentioned screw shafts. The screw shaft 28 for zero point adjustment has a dial knob with a scale on the protruding end. Similarly, there is a dial knob 3 with a digital counter 34 on the protruding end of the screw shaft 29 for fine adjustment.
5 are installed respectively.

To connect the digital counter 34 and the screw shaft 29 for fine adjustment, turn the screw shaft 29 for fine adjustment before installing the digital counter 34, and then press the scale plate of the digital counter 34 at the place where the front end of the guide bush 20 abuts. is set to zero, and in this adjusted state, the digital counter 34 is assembled and fixed to the screw shaft 29 for fine adjustment. At this time, the dial knob 33 of the zero point adjusting screw shaft 28 is turned to adjust the zero point adjusting screw shaft 28 so that the zero point is in the gap between the ink fountain key 8 and the ink fountain roll 1.

The ink fountain key device for the printing press according to the present invention allows the ink fountain key 8 to be slightly moved in the front and back direction independently of the counter 34 by operating the zero point adjustment dial knob 33. You can get such advantages.

Anyone can easily set the zero point position by simply turning the zero point adjustment dial knob 33.

A major feature is that the amount of adjustment movement of the ink fountain key 8 is directly proportional to the amount of displacement of the dial knobs 33 and 35, but the amount of movement of the fulcrum holder 13 is also directly proportional to the amount of rotation of the screw shaft 28 for zero point adjustment, so the zero point setting is Accurate control precision can be obtained without any adverse effect on the adjustment control of the pot key 8.

In addition, the link mechanism is structurally similar to the ink fountain key 8.
Screw shaft 2 for fine adjustment of the amount of movement of
It is also clear that it is easy to increase the amount of movement of the ink fountain key 9, and as a result, the actuation force of the fine adjustment screw shaft 29 becomes smaller than the actuation force of the ink fountain key 8. Therefore, the following advantages can also be obtained.

The pitch error of the fine adjustment screw shaft 29 can be reduced.

Even if the contact pressure between the ink fountain key 8 and the ink roller 1 is increased, the thrust applied to the fine adjustment screw shaft 29 is small, thereby eliminating movement errors caused by biting of the screw or changes in surface pressure applied to the screw thread. be able to.

(5) In order to ensure the return movement (movement of backward movement) of the ink fountain key 8, it is necessary to strengthen the spring 23. However, the force of this spring is directly applied to the screw shaft 2 for fine adjustment.
Assuming a case like No. 9, a large thrust is applied to the screw thread, making it difficult to use a sufficient spring. By increasing the ratio, the force of the return spring 23 of the ink fountain key 8 can be made sufficiently large, making it easy to move the ink fountain key 8 back and forth reliably.

Further, since the ink fountain key device in the printing press according to the present invention has the above-described configuration, the zero point adjustment dial knob 33 with scale can be manually rotated at any time to return it to the zero opening position. In addition, it is possible to make fine adjustments at any time by turning the fine adjustment dial knob 35 with the counter 34 with your fingers.It is not only extremely easy to use, but also allows you to perform both zero point adjustment and fine adjustment with your fingers. The overall configuration is simple and there are fewer troubles, and when making extremely small adjustments, there is no difficulty in timing (starting and stopping the motor) as with the electric type mentioned above. . In particular, a fulcrum holder 13 is provided at the rear of each ink fountain key 8 so that it can move forward and backward, but cannot rotate.A female screw 26 is bored in the rear end surface of this fulcrum holder 13, and a zero point adjustment screw is inserted into this female screw 26. The front end of the screw shaft 28 for zero point adjustment is screwed together, and the screw shaft 28 for zero point adjustment is supported on the fuselage 7 so as to be rotatable and cannot be moved forward or backward, and the rear end of the screw shaft 28 for zero point adjustment is attached to the outside of the fuselage 7. Since the dial knob 33 for adjusting the zero point with a scale is fixed to the protruding end,
When the zero point adjustment dial knob 33 is rotated, the fulcrum holder 13 moves forward and backward in direct proportion to the pitch number of the zero point adjustment screw shaft 28, and the above defect A3 can be solved. When the fulcrum holder 13 moves back and forth, the load applied to the zero point adjustment screw shaft 28 is constant, so the defect A1 mentioned above can be eliminated. Further, in order for the fulcrum holder 13 to turn the zero point adjustment screw shaft 28 when the zero point adjustment dial knob 33 is released, it is necessary to apply a considerably large external force to the fulcrum holder 13, but the present invention In this case, there is no need to turn the zero point adjusting screw shaft 28 due to the structure, and the above-mentioned defect A2 can be solved. Furthermore, the tip of the zero point adjustment screw shaft 28 is fitted with a female screw 2 drilled in the rear end surface of the fulcrum holder 13.
6 and applies a forward and backward force to the fulcrum holder 13 through the screw thread, the tip of the zero point adjustment screw shaft 28 will not be crushed, and the above-mentioned defects B1 and B2 can be solved. can.
Moreover, since the zero point adjustment dial knob 33 is fixed to the outer end of the zero point adjustment screw shaft 28, the operation of the zero point adjustment dial knob 33 can be made while looking at the scale. It is possible to eliminate the defect of B3 above. In addition, the dial knob 33 for zero point adjustment
Since it is operated by hand, there is no need for the above-mentioned handle or screwdriver, and the above-mentioned A4,
B4 defects can be resolved.

Furthermore, an adjusting body 14 is provided below the fulcrum holder 13 in the fuselage 7 so as to be non-rotatable and movable forward and backward, and a female screw 27 is bored in the rear end surface of this adjusting body 14. The front end of the adjustment screw shaft 29 is screwed together, and the fine adjustment screw shaft 29 is rotatably supported on the fuselage 7 and cannot be moved forward or backward. Since the dial knob 35 for fine adjustment with a counter 34 is fixed to the protruding end thereof, when the dial knob 35 for fine adjustment is rotated, the adjustment body 14 is attached to the screw shaft for fine adjustment. 2
It advances and retreats in direct proportion to the number of pitches of 9, and can eliminate the defect of C3 mentioned above. When the adjusting body 14 moves back and forth, the load applied to the fine adjustment screw shaft 29 is constant, so the defect C1 mentioned above can be eliminated. Further, in order for the adjustment body 14 to turn the fine adjustment screw shaft 29 when the fine adjustment dial knob 35 is released, it is necessary to apply a considerably large external force to the adjustment body 14, but the present invention In this case, there is no need to turn the fine adjustment screw shaft 29 due to the structure, and the defect C2 mentioned above can be solved. Furthermore, the screw shaft for fine adjustment is equipped with a shaft-rotating type counter 34 which is cheap and easy to install.
It is possible to eliminate the defects of C4.

As described above, the present invention eliminates all the defects of A1 to A4, B1 to B4, and C1 to C4, and
It has the effect of completely achieving the intended purpose.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of an ink fountain key device in a printing press according to the present invention, and is a partially cutaway plan view of the whole, FIG. 2 is an enlarged front view of the main part, and FIG. It is a sectional view along the A line. 1... Ink fountain roll, 2, 2'... Side block, 3... Bottom plate, 4... Front edge, 5...
...Ink delivery slit, 6...Ink fountain, 7...
Machine body, 8... Ink fountain key, 9... Base plate section, 10
... Pressing plate, 13 ... Fulcrum holder, 14 ... Adjustment body, 15 ... Key, 16 ... Link, 17 ...
Fulcrum shaft, 18... First idle ring, 19... Spring, 20... Guide bush, 21... Pusher, 2
2...Eccentric cam, 23...Second idle ring, 24...Spring, 25...Spring receiver, 26, 27...Female screw, 28...Screw shaft for zero point adjustment, 2
9... Screw shaft for fine adjustment, 30... Flange, 31... Color, 33... Dial knob with scale, 34... Digital counter, 35
...Dial knob.

Claims (1)

[Claims] 1. A fulcrum holder 13 provided at the rear of each ink fountain key 8 in the machine body 7 so as to be able to move forward and backward but not rotate; a female screw 26 drilled in the rear end surface of the fulcrum holder 13; Screw shaft 28 for zero point adjustment is screwed together and supported on the fuselage 7 so that it can rotate freely and cannot move forward or backward.
The rear end of the screw shaft 28 for zero point adjustment protrudes outside the fuselage 7 and is fixed to the protruding end. A dial knob 33 for zero point adjustment with a scale is rotated to the lower part of the fulcrum holder 13 in the fuselage body 7. Adjustment body 14 provided as disabled and freely movable forward and backward
and a female screw 27 bored on the rear end surface of the adjustment body 14.
, a fine adjustment screw shaft 29 screwed into the female screw 27 and supported on the fuselage 7 so as to be rotatable and unable to move forward or backward; and a screw shaft 2 for fine adjustment.
A dial knob 35 for fine adjustment with a counter 34 whose rear end extends out of the fuselage 7 and is fixed to the projecting end, and an adjustment body 14 at the front end of the fulcrum holder 13.
The base end is supported on the front end of the fulcrum holder 13 so as to be able to swing freely in the front and rear directions by the fulcrum shaft 17, and the free end is connected to the front end surface of the adjustment body 14 via the first idler ring 18. a link 16 provided in such a way that it is always in pressure contact with the spring 19;
The fulcrum shaft 17 is attached to the base end of the link 16 so as to be freely rotatable on the outer periphery of the cam surface of the eccentric cam 22 which is rotatable around the shaft 17, and a spring 19 is attached to the rear end of the ink fountain key 18. An ink fountain key device for a printing press, characterized in that the second idler ring 23 is rotatably supported in a state of constant pressure contact.