JPH0445347B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink fountain key device in a printing press.

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 this lever, and An ink fountain device is described that includes a roller 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 whose lower end is rotatably driven. 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.) It is necessary to perform the zero point position setting operation at the time of initial setting for the first time by the driver and when the gap between the ink fountain key and the ink roller changes due to wear or other reasons.

In the first conventional example described 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 changed and adjusted using the fine adjustment knob (number 36 in the publication) with the other hand. Since the zero point adjustment can be carried out using the above method, the operation is cumbersome, and since the adjustment is originally a minute amount, it requires a high level 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 adjusted during assembly, Readjustment cannot be done without disassembling it, making readjustment difficult.

As a means to solve this difficulty, as in the second conventional example, there is provided a coarse adjustment mechanism (hereinafter referred to as a solution means) in which the rotational fulcrum at the upper end of the lever is adjustable and movable in the direction of movement of the ink fountain key. ) 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 attaching the fountain key rotatably in the middle of a lever whose upper end is a rotational fulcrum and whose lower end is rotationally driven, the rotational fulcrum at the upper end of the lever is , the adjustment movement is made using support rollers (number 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 in which the small and large diameter parts are connected by a gentle curve. The support rollers are rotated using a removable handle (number 18 in the same publication), and the rotation position of the support rollers obtained by operating the handle is set using a fixing screw (in the same publication). A cover (code 25 in the same bulletin) that is held in place (code 19 in the bulletin)
(hereinafter referred to as type A), and the position of the pot key can be adjusted by attaching the pot key rotatably in the middle of a lever whose upper end is a rotational fulcrum and whose lower end is rotationally driven. In the ink fountain device, a type (hereinafter referred to as B) with a cover (number 25 in the same publication) whose pivot point at the upper end of the lever can be adjusted and moved using an adjustment screw (number 16A in the same publication)
It's called a format. ).

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 on an upward slope, and feels light when moving on a downward slope, resulting in poor operability.

A2 If the operator forgets to tighten the fixing screw or intentionally does not tighten it because it takes time and effort to attach or remove the cover, the support rollers will naturally move due to the return force of the return spring of the ink fountain key or external vibrations. There is a risk that the set value may become incorrect due to 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 it being lost.

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

B1 The tip of the adjustment screw is easily crushed, making it difficult to use if you are not familiar with the peculiarities of this adjustment screw.

B2 It is necessary to perform the adjustment operation using the protrusion of the adjustment screw head as a guide, and the results of the operation are likely to vary.

A screwdriver is required to operate the B3 adjustment screw,
It is a hassle for the operator to have to carry it at all times.

The present invention solves the above-mentioned defects A1 to A4 and B1 to B3, in which the ink fountain key 19 can be slightly moved inward and outward directions by operating the zero point adjustment dial knob 22, regardless of the adjustment of the sensor 24. The object of the present invention is to provide an ink fountain key device for a new printing press that does not have an ink fountain key device.

In order to achieve the above object, the ink fountain key device in a printing press according to the present invention is provided with a fulcrum holder 13 provided at a position behind each ink fountain key 19 in the machine body 7 so as to be movable forward and backward but non-rotatable.
, a female screw 27 drilled in the rear end surface of the fulcrum holder 13, a screw shaft 21 for zero point adjustment whose front end is screwed to the female screw 27 and is supported on the fuselage 7 so as to be rotatable and unable to move forward or backward; a dial knob 22 that protrudes the rear end of the adjustment screw shaft 21 to the outside of the fuselage 7 and is fixed to the protruding end;
In the fuselage 7, a female threaded pipe 29 is provided below the fulcrum holder 13 so as to be rotatable and cannot move forward or backward, a fine adjustment screw shaft 6 screwed into the female threaded pipe 29, and a female threaded pipe 29. A first driven gear 4 integrally provided at the rear end, and a motor 1 supported on the fuselage body 7 in a state where it is always meshed with the first driven gear 4.
The drive side gear 3 rotates by the fulcrum holder 1
A link 11 is mounted on the front end of the screw shaft 3 so as to be swingable in the front-back direction of the proximal end thereof, and the rear surface of the free end is always pressed against the front end surface of the screw shaft 6 for fine adjustment by a spring 16. A transmission device is provided at the base end to reduce the amount of oscillation of the free end of the link 11 and transmit it to the ink fountain key 19 as a forward/backward amount, and a rear end of the screw shaft 6 for fine adjustment is inserted outside the female threaded pipe 29. A second driven gear 5 having a different number of teeth than the first driven gear 4, which is provided at the protruding end in a non-rotatable and non-removable state and always in mesh with the driving gear 3. It is.

Hereinafter, the configuration and operating method of the embodiment of the present invention will be explained with reference to the drawings.The rotational movement by the motor 1 is transmitted through the spur gear 2, the driving gear 3, the first driven gear 4, and the second driven gear 5. The first driven gear 4 is integrally provided at the rear end of a female threaded pipe 29 which is held in the body 7 so as to be rotatable and unable to move forward or backward. Furthermore, a screw shaft 6 for fine adjustment is screwed into the female threaded pipe 29. The first driven gear 4 and the second driven gear 5
The gears have a different number of teeth by one or more teeth and mesh with the driving gear 3 at the same time. When the driving side gear 3 rotates and the first driven gear 4 rotates once, the second driven gear 5 produces a rotational amount difference in the advance direction or the lag direction with respect to the first driven gear 4 by the difference in the number of teeth. In addition, as a result of the fine adjustment screw shaft 6 fixed to the second driven gear 5 also rotating at the same time,
This fine adjustment screw shaft 6 is connected to the female threaded pipe 2 by an amount equivalent to the amount of rotation of the first and second driven gears 4 and 5.
Move inward and outward within 9. Further, a receiving plate 8 is fitted to the inner end of the fine adjustment screw shaft 6, and this receiving plate 8 is in contact with the first idler ring 9. The first idler 9 is connected to the link 1 via the support shaft 10.
It is supported at the free end of the shaft 10 and rotates freely around the support shaft 10. The base end of the link 11 is connected to the fulcrum holder 13 by a pin 12, and the link 11 is moved inwardly around the pin 12.
Can be swung outward.

Further, a push rod indicated by reference numeral 14 in the figure is held by a push guide 16, and at the same time, the first idler ring 9 is always pressed against the receiver 8 by a first spring 16. That is, when the screw shaft 6 moves forward or backward, the link 11 swings in the inward and outward directions via the first idler ring 9 that is in contact with the screw shaft 6.

Further, a second idler ring 17 is attached to an intermediate position of the link 11 so as to be freely rotatable by a support shaft 18, and the second idler ring 17 is in contact with the rear end of the ink fountain key 19. This ink fountain key 19 is designed to slide on the top surface of the machine body 7 in the front and back direction, and the second
It is always pressed rearward by the spring 20 so that its rear end is pressed against the second idler ring 17. That is, when the link 11 swings back and forth about the pin 12, the second idler ring 17 also swings, and the ink fountain key 19 in contact with it slides back and forth.

Further, the fulcrum holder 13 supporting the link 11 is designed to be able to slide forward and backward through a guide hole 26 provided in the support block 23, and a female screw 27 is bored at one end of the fulcrum holder 13.
A screw shaft 21 for zero point adjustment is screwed into the screw shaft 21 . This screw shaft 2 for zero point adjustment
1 is rotatably supported by the fuselage body 7 via a seat member 28 and screws 30, but cannot move forward or backward, and has a dial knob 22 fixed to its outer end. When the dial knob 22 is rotated, the fulcrum holder 13 moves back and forth, and the ink fountain key 19 is slid back and forth via the second idler ring 17.

In the above embodiment, the zero point adjustment dial knob 2
2, the ink fountain key 19 can be slightly moved inward and outward directions independently of the adjustment of the sensor 24, resulting in the following advantages.

Anyone can easily set the zero point position by simply turning the dial knob 22.

According to the link mechanism, the adjustment movement amount of the ink fountain key 19 is linearly proportional to the displacement amount of the sensor 24, but the fulcrum holder 13
Screw shaft 21 for zero point adjustment
Since the amount of movement is equal to the amount of movement of the ink fountain key 19, the zero point setting has no adverse effect on the adjustment control of the ink fountain key 19, and accurate control accuracy can be obtained.

Since the zero point adjustment operation can be performed separately from the drive unit, there is no need to use a torque limiter or the like to reduce operating resistance when adjusting the zero point when using a reduction motor with a large reduction ratio.

In addition, the link mechanism is structurally easy to increase the amount of movement of the fine adjustment screw shaft 6 relative to the amount of movement of the ink fountain key 19.
As a result, it is also clear that the actuation force of the fine adjustment screw shaft 6 becomes smaller than the actuation force of the ink fountain key 19. Therefore, the following advantages can also be obtained.

The pitch error of the fine adjustment screw shaft 6 can be reduced.

Even if the contact pressure between the ink fountain key 19 and the ink roller 25 is increased, the thrust applied to the fine adjustment screw shaft 6 is small, so movement errors due to biting of the screw or changes in surface pressure applied to the screw thread are eliminated. be able to.

Return movement of key 19 (movement to move backward)
In order to ensure this, it is necessary to make the spring 20 strong. However, assuming that the force of this spring is applied directly to the screw shaft 6 for fine adjustment, a large thrust is applied to the threaded portion, which increases the driving torque of the screw and places a large burden on the motor 1. This makes it difficult to use a sufficient spring, but the present invention increases the force of the return spring 20 of the ink fountain key 19 by increasing the ratio of the center distances between the fulcrum shaft 12, the lower end idler 9, and the ejecting idler 17. Since the ink fountain key 19 can be made sufficiently large, it becomes easy to reliably move the ink fountain key 19 in and out.

Since the ink fountain key device in the printing press according to the present invention has the above-described configuration, it can be used at any time.
The opening degree can be returned to the zero opening position by turning the operation dial knob 22, and the motor 1 can be turned for fine adjustment at any time, making it extremely easy to use. In particular, a fulcrum holder 13 is provided at the rear of each ink fountain key 19 so as to be able to move forward and backward but not rotate.
A female screw 27 is bored in the rear end surface of the fulcrum holder 13, and the front end of the zero point adjustment screw shaft 21 is screwed into the female screw 27, so that the zero point adjustment screw shaft 21 can be freely rotated around the fuselage 7. The rear end of the screw shaft 21 for zero point adjustment protrudes outside the fuselage 7, and the dial knob 22 is fixed to the protruding end. When the fulcrum holder 13 is added, the fulcrum holder 13 moves forward and backward in direct proportion to the pitch number of the zero point adjustment screw shaft 21, 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 21 is constant, so the defect A1 mentioned above can be solved. In addition, the operation dial knob 2
In order for the fulcrum holder 13 to turn the zero point adjusting screw shaft 21 when the fulcrum holder 2 is released, it is necessary to apply a considerably large external force to the fulcrum holder 13. The screw shaft 21 for zero point adjustment does not need to be rotated by A2 above.
defects can be eliminated. Furthermore, the tip of the zero point adjustment screw shaft 21 is screwed into a female screw 27 drilled in the rear end surface of the fulcrum holder 13, and applies forward and backward force to the fulcrum holder 13 through the screw thread. The tip of the zero point adjusting screw shaft 21 is not crushed, and the above defect B1 can be solved. Moreover, since the dial knob 22 is fixed to the outer end of the zero point adjustment screw shaft 21, the dial knob 2
Operation No. 2 can be performed while looking at the dial and making a judgment, and the above-mentioned defect B2 can be solved. In addition, the dial knob
Since the 22 is operated by hand, there is no need for the above-mentioned handle or screwdriver.
Defects in A4 and B3 can be resolved.

As described above, the present invention eliminates all of the defects A1 to A4 and B1 to B3, and has the effect of completely achieving the intended purpose.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the ink fountain key device in the printing press of the present invention, showing a front view of the main parts, Fig. 2 is a sectional view taken along the line 1A-A, and Fig. 3 shows the ink fountain part. It is a partially cut away plan view. 1...Motor, 2, 3, 4, 5...Gear, 6...
... Screw shaft, 7 ... Aircraft, 8 ... Holder, 9 ... First idle ring, 10 ... Support shaft, 11 ... Link, 12 ... Pin, 13 ... Fulcrum holder, 1
4... Push rod, 15... Push guide, 16... First spring, 17... Second idler, 18... Support shaft, 19... Ink fountain key, 20
... Second spring, 21 ... Screw shaft, 22 ... Dial knob, 23 ... Support block, 24 ... Sensor, 25 ... Ink roller, 26 ... Guide hole, 27 ... Female screw, 28 ... …
Seat member, 29...female threaded pipe, 30...screw.

Claims (1)

[Claims] 1. A fulcrum holder 13 provided at the rear of each ink fountain key 19 in the machine body 7 so as to be able to move forward and backward but not rotate; a female screw 27 bored in the rear end surface of the fulcrum holder 13; and a female screw 27 provided at the front end of the female screw 27 Screw shaft 21 for zero point adjustment is screwed together and supported on the fuselage 7 so as to be rotatable and unable to move forward or backward.
, a dial knob 22 whose rear end of the screw shaft 21 for zero point adjustment protrudes outside the fuselage 7 and is fixed to the protruding end; A female threaded pipe 29 provided so as to be unable to move backward, a screw shaft 6 for fine adjustment screwed into the female threaded pipe 29, and a first driven gear 4 integrally provided at the rear end of the female threaded pipe 29.
, the fuselage 7 is in constant mesh with the first driven gear 4.
A driving side gear 3 rotated by a motor 1 is rotatably supported on the front end of the fulcrum holder 13 so as to be able to swing freely in the front and back direction of the proximal end, and the rear surface of the free end is mounted on the front end surface of the screw shaft 6 for fine adjustment. Spring 1
Link 1 provided in a state where it is always pressed by 6
1, a transmission device at the base end of the link 11 that reduces the amount of oscillation of the free end of the link 11 and transmits it to the ink fountain key 19 as a forward/backward amount; and a rear end of the screw shaft 6 for fine adjustment with a female thread. A second driven gear 5 having a different number of teeth than the first driven gear 4, which protrudes from the tube 29 and is provided at the protruding end in a non-rotatable and non-removable state and always in mesh with the driving gear 3. An inkwell key device for a printing press, characterized by having the following.