JPH0245001Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the amount of ink discharged from an ink fountain in a printing press.

A sheet-fed or web-fed rotary printing press is equipped with an inking device that supplies printing ink to a plate mounted on a plate cylinder. It consists of a pot roller that rotates to attach ink to its circumferential surface and rotates around it, and a group of rollers that transfer ink on the circumferential surface of the pot roller while evenly leveling it in each direction and depositing it on the plate surface. Of these, the ink fountain consists of a fountain roller, an ink blade whose tip is supported by a fountain stay that connects the machine frame on both sides and whose tip is in contact with the circumferential surface of the fountain roller, and an ink fountain that closes both ends. It is a container with a triangular cross section surrounded by , and is configured so that the amount of ink output can be adjusted by changing the gap between the tip of the ink blade and the circumferential surface of the fountain roller.

Conventionally, this type of ink fountain adjustment device has been designed to adjust the ink blade and fountain by rotating back and forth a plurality of fountain keys screwed in parallel in the longitudinal direction of the fountain stay with their tips facing the tip of the ink blade. The gap with the roller circumferential surface is adjusted for each section, but in the case of screw-type pot keys like this, there are some parts that require fine adjustment, but most of the parts are only used when attaching and detaching. The screw pitch is the same in all locations, and the amount of movement of the pot key relative to the number of rotations is the same, so if the screw pitch is set finely to match the fine adjustment, ink scum and foreign matter may get into the sliding part of the pot key. When cleaning, etc., the pot key, which has a fine screw pitch, must be rotated to attach and detach, which not only takes a long time, but also makes it extremely difficult to return to its original position after cleaning. There were flaws.

In addition, as an alternative to this, the pot key is slidably supported on the pot stay, and a cam whose cam surface is in contact with the shaft end is provided, and by rotating this cam, the pot key is moved forward and backward. A similar device was proposed, but this device still had the problem that the pot key could not be easily attached or detached.

The present invention has been developed in view of the above points.The pot key is slidably supported on the pot stay, is biased by a spring member in a direction away from the ink blade, and is attached to the opposite end of the ink blade. This and a T-shaped lever are removably locked by engagement with a pin and a U-shaped groove, and one end of this lever is supported on the pot stay side, and the other end is brought into contact with the cam surface of the cam. By arranging the cam key to move forward and backward through the lever by the rotation of the cam, it is possible to adjust the amount of ink output with high precision and excellent reproducibility with smooth movement, To provide an ink fountain adjusting device for a printing press, which facilitates attachment and detachment of a fountain key and facilitates return to the original position after reinstallation, thereby improving work efficiency and ink output reproducibility. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

1 to 5 show an ink fountain adjusting device according to the present invention, FIG. 1 is a side sectional view thereof, FIG. 2 is a front view from A in FIG. 1, and FIG. 3 is a BB in FIG. 1. A cross-sectional view, FIG. 4 is a front view as viewed from C in FIG. 1 with the cover removed, and FIG. 5 is an explanatory diagram of the pot key attachment/detachment operation. In the figure, in front of the pot roller 1 which is pivoted by machine frames on both sides and rotates in the direction shown by arrow D in the figure, there is a main body 2a whose both end surfaces are fixed to the inner surface of the machine frame, and a main body 2a which is fixed to the inner surface of the machine frame. A pot stay 2 consisting of a plurality of partition walls 2c fixed at regular intervals with bolts 2b is installed between frames on both sides. A blade stand 3 having approximately the same length as the pot stay 2 is integrally fixed to the inclined upper surface of the pot stay 2 with bolts 4, and a blade stand made of an elastic thin steel plate is attached to the upper surface of the pot stay 2. An ink blade 5 of approximately the same length is fixed at its base with its tip facing the circumferential surface of the pot roller 1. Further, both ends of the gutter-shaped portion formed by the circumferential surface of the pot roller 1 and the ink blade 5 are closed with triangular ink wells 6, thereby creating an ink pot 8 that stores ink 7 for printing. is formed. Then, as the pot roller 1 rotates, the ink 7 flows out from the gap between the roller 1 circumferential surface and the tip of the ink blade 5, which is indicated by the symbol t in the figure, due to the wedge action between the circumferential surface of the pot roller 1 and the ink blade 5, and flows onto the roller 1 circumferential surface. configured to adhere.

In the main body 2a of the pot stay 2, a stepped key hole 9 consisting of a large diameter part and a small diameter part is located between each partition wall 2c and is bored at an angle of approximately 45 degrees with the ink blade 5. A pot key 10 is slidably supported in the key hole 9 with its tip facing the tip of the ink blade 5. This pot key 10 has a key hole 9
A compression coil spring loaded between the collar 10a and the stepped portion of the keyhole 9. 11 in a direction away from the ink blade 5. Further, the support piece 10b of the pot key 10 is provided with a U-shaped long groove 10c that is open in the forward and backward direction of the pot key 10, and one end of the long groove 10c is formed in the shape of a bifurcated strip. A pin 13 of a lever 12 is engaged with the pot key 10 so as to form a T-shape. And, at one end of this lever 12, there is a bifurcated part,
Roller 14 formed by a ball bearing is pin 1
It is pivoted at 5.

Reference numeral 16 denotes a support roller consisting of a small diameter portion 16a rotatably supported on the partition wall 2c and a large diameter portion 16b eccentric to the small diameter portion 16a, and supports one end of the lever 12 on the circumferential surface of the large diameter portion 16b. The lever 12 is supported against the elastic force of the compression coil spring 11, and when a handle 18 is inserted into the handle hole 17 and rotated, the support position of the lever 12 is moved by an eccentric action. ing. Furthermore, a fixing screw 19 is screwed into the front surface of the partition wall 2c to fix the support roller 16 at the movement adjustment position. Furthermore, below the support roller 16, a camshaft 20 extending over the entire length of the pot stay 2 is supported passing through the partition wall 2c. A plurality of cams 21 each having a cam surface on the outer periphery consisting of an adjustment portion 21c connected by a curved line are rotatably fitted in correspondence with each roller 14. And this cam 21 is
By gripping and rotating the adjustment lever 22 that protrudes forward, the adjustment portion 21c of the cam surface swings the lever 12 via the roller 14 to move the pot key 10 forward or backward. The front surface of the pot stay 2 is covered with a cover 25 having a guide groove 23 from which an adjustment lever 22 is protruded and a scale 24, and the scale 24 is configured to indicate the rotational position of the cam 21. There is. Further, a piece 27 is loaded in the spring hole provided in the cam 21 to press the camshaft 20 with the elastic force of the compression coil spring 26 and to softly brake the cam 21 with the frictional force.

The operation of the ink fountain adjusting device configured as above will be explained. The ink 7 stored in the ink fountain 8 flows out from the gap t between the circumferential surface of the fountain roller 1 and the ink blade 5 as the fountain roller 1 rotates.
Adheres to the surrounding surface. To adjust the amount of ink output, grip the adjustment lever 22 and rotate the cam 21 against the braking force of the piece 27. For example, when the adjusting lever 22 is rotated counterclockwise from the position shown in FIG. 1, the roller 14 moves to the right in the figure due to the action of the adjusting portion 21c, which slopes upward from the small diameter portion 21a to the large diameter portion 21b. Move to. At this time, lever 12
is urged by the compression coil spring 11 together with the pot key 10 and is pressed against the cam 21 and the support roller 16, so the lever 12 is pushed by the compression coil spring 11.
It rotates counterclockwise in the figure about the support point provided by the support rollers 16 against the elastic force of. Therefore, the pot key 10 moves to the right in the figure, the gap t becomes smaller, and the ink output amount decreases, and this ink output amount is adjusted to the scale 24 corresponding to the adjustment lever 22.
Displayed by. In addition, when increasing the amount of ink output, when the cam 21 is rotated clockwise in the figure, the lever 12 is rotated clockwise in the figure by the elastic force of the compression coil spring 11, so that The key 10 moves in the direction away from the ink blade 5, and the gap t becomes larger.

Next, if you want to change the adjustment range of the ink output amount, use the fixing screw 2 that fixes the support roller 16.
1, insert the handle 18 into the handle hole 17, rotate the support roller 16, and then tighten the fixing screw 19. Due to the eccentricity of the small diameter part 16a and the large diameter part 21b of the support roller 16, Lever 12
The support position of the lever 12 moves, and the pot key 10 advances and retreats independently of the rotation of the cam 21. Therefore, even if the adjustment lever 22 is similarly rotated between 0 and 10 on the scale 24, the support position of the lever 12 will not change. The adjustment range of the gap t changes accordingly. In addition, the fixing screw 19 and the handle 18
By providing a window in the cover 23, the rotation can be performed with the cover 23 attached.

In this type of ink fountain device, ink scum and foreign matter often enter the key hole 9 of the fountain stay 2, and it is necessary to frequently remove this. Therefore, the operation of attaching and detaching the pot key 10 for cleaning will be explained based on FIG. 5. Figure 5 shows the first
The ink blade 5, blade stand 3, and cover 25 are removed after the pot stay 2 is rotated from the state shown in the figure so that its upper surface becomes horizontal. After that, insert the handle 28 into the hole 10d provided at the tip of the pot key 10, and
0 is pulled upward against the elastic force of the compression coil spring 11, the engagement between the long groove 10c provided in the support piece 10b and the pin 13 on the lever 12 side is released, as shown in FIG. Ruru. Therefore, by pulling out the lever 12 in this state with the roller 14 attached thereto in the direction of arrow E in the figure, it can be easily taken out of the apparatus. By doing this, the axial direction of the pot key 10 is opened, so that by removing the handle 28, the pot key 10 can be easily taken out of the device together with the compression coil spring 11. After removing the pot key 10 in this way, the inside of the key hole 9 and the pot key 1 are
After cleaning, insert the pot key 10 into the key hole 9 together with the compression coil spring 11, and pull up the pot key 10 with the handle 28 against the elastic force of the compression coil spring 11 while pushing the lever 12. By pushing in and releasing the pot key 10 with the pin 13 and the long groove 10c facing each other, the pin 13 and the long groove 10c are
are engaged, and installation of the pot key 10 is completed. After this, the cover 25, blade stand 3, and ink blade 5 are attached. In this way, in this device, the pot key 10 can be attached and detached from the pot stay 2 very easily, and the cam 21 and the support rollers 16 are not touched at all during the attachment/detachment operation. After reinstallation, it returns to its original position accurately, and the amount of ink output does not change compared to before the installation and removal work.

FIG. 6 is a side view of a joint between a pot key and a lever showing another embodiment of the present invention. In this embodiment, the pin 13 provided on the lever 12 side in the previous embodiment is A long groove 1 provided on the key 10 side and also provided on the pot key 10 side.
0c is provided on the lever 12 side. and,
The pin 13 and the long groove 10c removably engage with each other, thereby functioning in the same manner as in the previous embodiment.

FIG. 7 is a sectional view of the vicinity of the pot key showing another embodiment of the present invention. In this embodiment, the pot key 10 is pulled against the elastic force of the compression coil spring 11. , an annular groove 1 at the tip of the pot key 10
0e is provided. By doing so, the pot key 10 can be grasped and pulled with the tip of the finger.

As is clear from the above description, according to the present invention, in the ink fountain adjustment device of a printing press, the fountain key is slidably supported on the fountain stay and is biased by a spring member in a direction away from the ink blade. , a lever forming a T-shape is removably locked on the opposite end of the blade by engagement with a pin and a U-shaped groove, one end of this lever is supported on the pot stay side, and the other end is By configuring the cam to be in contact with the cam surface of the cam so that the cam key can be advanced or retracted via a lever by the rotation of the cam, the movement of the urn key is small compared to the large rotation of the cam due to the lever principle. Any adjustment ratio can be obtained by selecting the pivot position of the lever and setting the cam curve, making it possible to finely adjust the ink output amount with extremely high precision with smooth movement. Since the urn key can be attached and removed with the extremely simple action of pulling the lever and moving the lever forward and backward, cleaning work around the urn key becomes easier, improving work efficiency and reducing labor. In addition, since the position of the pot key before and after attachment and detachment does not change at all, the amount of ink output does not change, making it possible to improve work efficiency and reduce the amount of paper waste when restarting operation.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the ink fountain adjustment device for a printing press according to the present invention, in which FIG. 1 is a side sectional view thereof, FIG. 2 is a front view from A in FIG. 1, and FIG. 1 is a sectional view of BB in FIG. 1, FIG. 4 is a front view of C in FIG. 1 with the cover removed, FIG. 5 is an explanatory diagram of the operation of attaching and removing the pot key, and FIG. FIG. 7 is a side view of the joint between the pot key and the lever, and FIG. 7 is a sectional view of the vicinity of the pot key showing another embodiment of the present invention. 1... Pot roller, 2... Pot stay, 5... Ink blade, 8... Ink pot, 10... Pot key,
10c...Long groove, 11...Compression coil spring, 12
... lever, 13 ... pin, 16 ... support roller,
21...cam, 22...adjustment lever.

Claims (1)

[Scope of utility model registration request] The ink blade 5 has its base fixed on the pot stay 2 that connects the machine frames on both sides, and its tip faces the circumferential surface of the pot roller 1, and the pot stay has one end facing the tip of the ink blade. A plurality of pot keys 10 are slidably supported by a shaft, a spring member 11 biases the pot keys in a direction away from the ink blade, and a central portion is opened in the direction of movement of the pin 13 and the pot keys. A lever 12 is removably locked to the other end of the pot key in a T-shape by engagement with the long groove 10c, and has one end supported on the pot stay side, and the other end of this lever. The lever 1 is rotatably supported on the pot stay 2 side with the cam surface facing the side and rotated.
2. An ink fountain adjusting device for a printing press, comprising: a cam 21 for advancing and retracting the fountain key 10 via a cam 21.