JPH0732587A - Ink feeding apparatus of printer - Google Patents

Abstract

PURPOSE:To decrease driving resistance of an ink vol. adjusting member, to increase its responding speed and to control the amt. of ink with high accuracy. CONSTITUTION:An ink vol. adjusting member 6 is fixed on an ink pot member 5 fixed on a frame 4 in such a way that a closing position where it is brought into contact with an ink base roller 1 and an ink path 23 between the ink base roller is closed and an opening position where it is separated from the ink base roller and the ink path 23 is opened are switched. A support member 9 using a permanent magnet is fixed on an ink pot member 5 made of a ceramic material by magnetic force and a support part 11 of the ink vol. adjusting member 6 made of a ceramic material is rotatably supported by suction on a support member 9 by magnetic force and a spring 16 energizing the ink vol. adjusting member 6 in the closing direction and an electromagnet 18 sucking a suction part of the ink vol. adjusting member 6 in the opening direction against the elastic force of the spring 16 are provided on the ink pot member 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink supply device for a printing machine.

[0002]

2. Description of the Related Art In a printing machine, it is necessary to control the amount of ink supplied to the printing surface, and depending on the design, it may be necessary to change the amount of ink depending on the position in the width direction of the printing surface.

As an ink supply device of a printing press capable of controlling the ink amount as described above, a plurality of ink amount adjusting members constituting an ink fountain are arranged side by side in the length direction of an ink source roller without gaps, and each ink amount adjusting device is provided. The members are individually rotated by the air cylinders and switched between a closed position in which the ink source roller is contacted with the ink source roller to close the ink channel and an open position in which the ink channel is opened away from the ink source roller. It is known that this was done.

[0004]

However, in the case of the ink supply device as described above, an actuator such as an air cylinder for switching and driving the ink amount adjusting member has a movable part, and the ink amount is caused by its resistance. The driving resistance of the adjusting member becomes large, and it is difficult to drive smoothly. Therefore, the response speed of the ink amount adjusting member is slow, and it is difficult to control the ink amount with high accuracy.

The object of the present invention is to solve the above problems,
It is an object of the present invention to provide an ink supply device for a printing press, which has a small drive resistance of the ink amount adjusting member and a high response speed of the ink amount adjusting member, and therefore can control the ink amount with high accuracy.

[0006]

In an ink supply device for a printing press according to the present invention, an ink amount adjusting member forming an ink fountain contacts an ink source roller to close an ink passage between the ink source roller and the ink source roller. Position and open position to open the ink passage away from the ink source roller,
In an ink supply device of a printing machine attached to an ink fountain member attached to a frame, a fulcrum member using a permanent magnet is fixed to the ink fountain member, and a fulcrum part and a suction part made of a magnetic material are ink amount adjusting members. , The fulcrum portion of the ink amount adjusting member is rotatably adsorbed and supported by the fulcrum member by magnetic force, and resists the elastic force of the elastic member and the elastic member for urging the ink amount adjusting member in the closing direction. It is characterized in that the ink fountain member is provided with an electromagnet for attracting the suction portion of the ink amount adjusting member in the opening direction.

For example, a plurality of ink amount adjusting members are arranged side by side in the length direction of the ink source roller without a gap.

Further, for example, a permanent magnet fulcrum member having a cylindrical attracting surface is fixed to the ink fountain member, and an ink groove adjusting member made of a magnetic material is in contact with the attracting surface of the fulcrum member and has a circular cross section. The fulcrum portion is integrally formed by forming the. In this case, for example, a groove having an arcuate cross section is formed in a portion made of a magnetic material of the ink fountain member, and a part of a cylindrical fulcrum member is fitted in the groove to be attracted and supported by magnetic force.

[0009]

When the electromagnet is energized to make it excited, the suction portion of the ink amount adjusting member is attracted by the electromagnet in the opening direction against the elastic force of the elastic member, and the ink amount adjusting member is rotated in the opening direction. The ink passage opens. On the contrary, when the energization of the electromagnet is stopped and the electromagnet is de-energized, the ink amount adjusting member is biased in the closing direction by the elastic member, the ink amount adjusting member rotates in the closing direction, and the ink passage is closed. .

Since the fulcrum part of the ink amount adjusting member is only adsorbed and supported by the fulcrum member of the ink fountain member by magnetic force, the rotation resistance of the ink amount adjusting member is small. Moreover, since the ink amount adjusting member is directly driven by the electromagnet, the driving resistance of the ink amount adjusting member is extremely small. Therefore, the ink amount adjusting member has a high response speed. Furthermore, since the ink amount adjusting member is only adsorbed and supported on the fulcrum member of the ink fountain member by magnetic force, disassembly of the ink amount adjusting member,
Easy to assemble.

When a plurality of ink amount adjusting members are arranged side by side in the length direction of the ink source roller without a gap, the ink amount can be changed depending on the position in the length direction of the ink source roller, that is, the width direction of the printing surface. it can.

A fulcrum member made of a permanent magnet having a cylindrical attracting surface is fixed to the ink fountain member, and an ink groove adjusting member made of a magnetic material is formed with a groove having an arcuate cross section which is in close contact with the attracting surface of the fulcrum member. Therefore, when the fulcrum portion is integrally provided, the structure of the ink amount adjusting member is extremely simple, and the ink amount adjusting member rotates along the cylindrical suction surface of the fulcrum member with extremely small resistance. in this case,
If a groove having an arcuate cross section is formed in a portion of the ink fountain member made of a magnetic material, and a part of a cylindrical fulcrum member is fitted in the groove so as to be attracted and supported by magnetic force, the ink fountain member Fixing the fulcrum member is also extremely easy.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show the main part of an ink supply device of a printing machine, and FIGS. 3 to 5 show a partial enlargement of the ink supply device in three different states. In the following description, the right side of FIG. 1 is the front, the left side is the rear, and the left and right when viewed from the front to the back, that is, the left and right of FIG. 2 is the left and right. The rotation direction is the same as in FIG.

Ink source roller extending horizontally in the left-right direction
The first ink kneading roller (2) of the plurality of ink kneading rollers is arranged in parallel in front of and below (1), and the ink feeding roller (3) is arranged in parallel between these rollers (1) (2). It is located in. Source roller (1) and kneading roller (2)
Are rotatably supported by the frame (4) of the printing machine at both left and right ends, and are rotated in the direction of the arrow in the drawing at a predetermined rotation speed synchronized with each other by a suitable driving device (not shown). Although not shown in detail, the call roller (3)
Is switched by a suitable switching device between a position away from the kneading roller (2) and in contact with the original roller (1) and a position away from the original roller (1) and in contact with the kneading roller (2). Since the configurations of the original roller (1), the calling roller (3) and the kneading roller (2) are known, detailed description thereof will be omitted.

An ink fountain member (5) made of a magnetic material that extends horizontally in the left-right direction is arranged behind and above the former roller (1), and a plurality of ink amount adjusting members (6) made of a magnetic material that form the ink fountain (6). ) Are mounted side by side on the pot member (5) without any gap. The pot member (5) has a substantially triangular prism shape, and support shaft portions (7) provided at both left and right ends of the pot member (5) are rotatably supported by the frame (4). As shown in FIG. 1, the pot member (5) is rotated at a printing position where the adjusting member (6) is close to the original roller (1), and is rotated counterclockwise from the printing member (6) as shown in FIG. ) Is switched to the cleaning position away from the original roller (1), and is fixed to the printing position by an appropriate means such as a lock pin (not shown).

In the state where the pot member (5) is fixed at the printing position, the first surface (5a) of the pot member (5) faces almost directly above and the second surface (5a) faces the second surface.
(5b) faces almost right behind, and the third surface (adjustment member mounting surface)
(5c) faces the front roller diagonally downward and faces the original roller (1). Grooves (8) with a semi-circular cross section that extend in the left-right direction and are located in a straight line are formed at three locations on the lower side of the third surface (5c) in the left-right direction, and each groove (8) has a cylindrical permanent shape. Half or less of the fulcrum member (9) made of a magnet is fitted and supported by attraction by a magnetic force. The portion of the fulcrum member (9) located outside the groove (8) is a cylindrical suction surface (9a).

The adjusting member (6) is formed by integrally forming a hook-shaped portion (6b) extending to the original roller (1) side at the upper end of a rectangular plate-shaped portion (6a). A fulcrum member on the lower rear surface of the plate-shaped part (6a)
A groove (10) having an arcuate cross section corresponding to (9) is formed, and thereby a fulcrum portion (11) is formed. Multiple adjustment members
(6) are aligned in the left-right direction without any gap, and the grooves (10) of each adjusting member (6) are closely fitted to less than half of the corresponding fulcrum member (9), and are attracted and supported by magnetic force. There is. And, each adjusting member (6), with respect to the vase member (5),
The fulcrum member (9) can be individually rotated by a certain amount. That is, the adjustment member (6) has an opening adjustment screw (1
It can rotate to the position where it hits the tip of 2). Further, in the adjusting member (6), the lower part of the plate-like portion (6a) is a pot member in the clockwise direction.
It can rotate to the position where it hits (5). The upper surface of the hook-like part (6b) of each adjusting member (6) is a cylindrical surface centered on the central axis of the fulcrum member (9), that is, the central axis of rotation of the adjusting member (6). The shape and size of the adjusting member (6) are determined so that no step is formed between the upper surfaces of the shaped portions (6b).

On the third surface (5c) of the pot member (5), screw holes (13),
The spring recess (14) and electromagnet recess (15) are the adjustment members.
One set is provided for (6). The screw hole (13) is formed in the upper part of the third surface (5c) at a right angle and reaches the first surface (5a). An adjusting screw (12) is screwed into each screw hole (13) from the side of the first surface (5a), and its tip portion slightly projects from the third surface (5c). The spring recess (14) is formed just below the screw hole (13), and the plate-like portion (6) of the adjusting member (6) is formed in this recess (14).
A compression coil spring (elastic member) (16) for accommodating the adjusting member (6) in a closing direction (clockwise direction) by being pressed against the upper rear surface of a) is housed. The electromagnet recess (15) is formed substantially at the upper and lower center of the third surface (5c) below the spring recess (14), and the adjusting member (6) corresponding to this recess (15) is formed. The suction part (17) is located approximately in the center of the vertical direction. Electromagnetic Recess (15)
The spring of the spring (16) against the suction of the adjustment member (6).
An electromagnet (18) that attracts (17) in the opening direction (counterclockwise) is housed. The pot member (5) is provided with a hole (19) reaching from the electromagnet recess (15) to the second surface (5b), and the electric wire of the electromagnet (18) is formed.
(20) is led out through this hole (19).

A washing tank (21) is arranged below the pot member (5). A cleaning blade (22) protruding obliquely forward and upward from the front end of the tank (21) is fixed to the front part of the tank (21). The left and right widths of the tank (21) and blade (22) are
A little larger than the left and right length of the original roller (1). Tank (21)
Is supported by a suitable driving device (not shown) so as to be movable in the front-rear direction. As shown in FIG. 5, the blade (22) is moved forward and the cleaning position where the blade (22) is brought into pressure contact with the original roller (1). As shown in FIG. 1, the blade (22) is moved to the rear position so that the blade (22) is separated from the original roller (1).

When printing is carried out in the above printing machine, as shown in FIGS. 3 and 4, the tank (21) is positioned at the rear standby position and the pot member (5) is fixed at the printing position. . Then, the ink (A) is put into the ink fountain between the fountain member (5) and the original roller (1). Although not shown, side plates (barrier plates) for preventing the outflow of ink from the ink fountain are provided at both left and right ends of the original roller (1).

In such a state, when the energization of the electromagnet (18) is stopped and the electromagnet (18) is de-energized, the adjusting member (6) is biased by the spring (16) in the closing direction as shown in FIG. Energized,
As described above, before the lower part of the plate-shaped part (6a) hits the pot member (5), the tip of the hook-shaped part (6b) comes into contact with the original roller (1), and the gap between the original roller (1) and The ink passage (23) closes. As for the part of the adjusting member (6) in which the ink passageway (23) is closed in this way, ink is transferred from the ink fountain to the outer peripheral surface of the original roller (1) even if the original roller (1) is rotating. Does not appear.

In the above state, when the electromagnet (18) is energized to be excited, the adjusting member (6) is attracted by the electromagnet (18) and rotated in the opening direction as shown in FIG. Then, the plate portion (6a) stops at a position where it abuts on the tip end portion of the adjusting screw (12). As a result, the tip of the hooked portion (6b) of the adjusting member (6) separates from the original roller (1), and the ink passage (23) opens. And the adjusting member with the ink passage (23) opened in this way
As for the portion (6), the ink (A) in the ink fountain passes through the ink passage (23) to the outer peripheral surface of the original roller (1) by the rotation of the original roller (1). By adjusting the position of the adjusting screw (12), the size of the ink passage (23) can be adjusted, and thereby the thickness of the ink on the surface of the original roller (1), that is, the ink amount can be adjusted. it can.

As described above, the ink ejected on the surface of the calling roller (1) is transferred to the surface of the calling roller (3) while the calling roller (3) is switched to a position where the calling roller (3) comes into contact with the calling roller (3). The ink transferred to the surface of the calling roller (3) is transferred to the kneading roller (2) while the calling roller (3) is switched to a position where it comes into contact with the kneading roller (2). Further, it is supplied to the printing surface via another kneading roller. By individually controlling the time during which the ink passageway (23) is open for each adjusting member (6), each adjusting member (6)
The amount of ink that emerges on the surface of the original roller (1) from the area (1) is individually controlled, and as a result, the amount of ink supplied to the printing surface is adjusted by the position in the width direction.

When cleaning is performed after printing, first, as shown in FIG. 5, the tank (21) is moved to the front cleaning position, and the blade (22) is brought into pressure contact with the surface of the original roller (1). ,
While the pot member (5) is fixed at the printing position, the original roller (1) is rotated while the electromagnet (18) is energized to open the ink passage (23). As a result, the ink (A) remaining in the ink fountain passes through the ink passageway (23) to the surface of the original roller (1) as in the case of printing, but this ink is scraped off by the blade (22). And collected in the tank (21). If all the ink (A) remaining in the ink fountain is taken out by the original roller (1) and collected in the tank (21) by the blade (22), the original roller (1) is left as it is for a while. To rotate. As a result, the ink remaining on the surface of the original roller (1) is scraped off by the blade (22), and the original roller
The surface of (1) is cleaned to some extent. After that, as shown in FIG. 6, the original roller (1) is stopped, the tank (21) is moved to the rear standby position, and the pot member (5) is switched to the cleaning position. At this time, the adjustment member is attached by the electromagnet (18).
(6) may be attracted in the opening direction, or the energization of the electromagnet (18) may be stopped as shown in FIG. When the energization of the electromagnet (18) is stopped, the adjusting member (6) is rotated in the closing direction by the elastic force of the spring (16) to the position where the lower part of the plate-like portion (6a) contacts the vase member (5). Stop. Then, in such a state, the hook-shaped portion (6b) of the adjusting member (6) that has been in contact with the surface of the original roller (1) and the ink is thoroughly washed. The calling roller (3) and the kneading roller (2) are automatically cleaned by known inker cleaning.

When the above washing is completed, the fountain member (5) is fixed to the printing position again as shown in FIG. 1, new ink (A) is put in the ink fountain, and the next printing is performed. Start work. Then, during this time, the old ink collected in the tank (21) is discarded.

In the conventional printing machine, the calling roller and the kneading roller are automatically cleaned by the inker cleaning, but the original roller and the ink adjusting member are manually cleaned. That is,
When the printing is completed, the ink remaining in the ink fountain is taken out while the original roller is stopped, and the parts of the original roller and the adjusting member that are in contact with the ink are washed by hand.
Therefore, there is a problem that cleaning work is troublesome and it takes time to change the setup.

On the other hand, in the above printing machine, when printing is completed, the ink remaining in the ink fountain is automatically collected by the blade (22) in the tank (21), and the original roller (1) ) Surface is cleaned to some extent. For this reason, a small amount of ink remains on the original roller (1) and adjustment member (6).
The surface of the hook-shaped part (6b) can be simply washed by hand, the cleaning work is easy and the time for changeover is short.

In the above printing machine, since the pot member (5) is made of a magnetic material, the fulcrum member (9) made of a permanent magnet is used as the pot member (5).
It can be sucked and supported by magnetic force only by fitting it in the groove (8), and it is not necessary to fix the fulcrum member (9) by other means. Further, since the adjusting member (6) is only adsorbed and supported on the fulcrum member (9) by magnetic force, it is easy to disassemble and assemble the adjusting member (6). Further, the portion (fulcrum portion) (1) of the groove (10) having an arcuate cross section of the adjusting member (6)
Since (1) is only adsorbed and supported by magnetic force on the cylindrical adsorption surface (9a) of the permanent magnet fulcrum member (9), the adjustment member (6) follows the cylindrical adsorption surface (9a). Rotate with extremely small resistance. Moreover, since the electromagnet (18) directly drives the adjusting member (6), the driving resistance of the adjusting member (6) is extremely small. Also, an adjustment member that contacts the ink (A) in the ink fountain
Since the upper surface of the hook-shaped part (6b) of (6) is a cylindrical surface centering on the rotation center axis of the adjusting member (6), two adjacent adjusting members (6) rotate in opposite directions. However, no step is formed between the upper surfaces of these hook-shaped parts (6b). And since there is no step between the upper surfaces of the adjacent hook-shaped parts (6b), the hook-shaped parts (6b) can be made thin, and the ink can be formed between the adjacent hook-shaped parts (6b). It doesn't get in. Also from this, the driving resistance of the adjusting member (6) becomes extremely small. For this reason, the driving of the adjusting member (6) is extremely smooth, the response speed of the adjusting member (6) is fast, and therefore the ink amount can be controlled with high accuracy.

Vase member (5), fulcrum member (9), adjusting member (6)
The configurations of the tank (21) and the like are not limited to those in the above embodiment, and can be changed as appropriate. For example, the portion to which the fulcrum member is attached may be separately made of a magnetic material and fixed to the pot member made of a non-magnetic material. The fulcrum member may be fixed to the pot member made of a non-magnetic material by an appropriate means. You may make it comprise a part of fulcrum member with a permanent magnet. The fulcrum portion and the suction portion separately made of magnetic material may be fixed to the adjusting member made of non-magnetic material. It is also possible to provide only one fulcrum member and share it with a plurality of adjusting members. Only one adjusting member may be provided. In the above embodiment, the entire tank (21) is moved to switch the position of the blade (22), but only a part including the blade is moved to switch the position of the blade. Good.

[0031]

According to the ink supply device of the printing machine of the present invention, as described above, the resistance of the rotation of the ink amount adjusting member is small and it can be driven smoothly, and therefore, the ink amount adjusting member. It is possible to control the amount of ink with high accuracy and a high response speed. Further, the ink amount adjusting member can be easily disassembled and assembled.

If a plurality of ink amount adjusting members are arranged side by side in the length direction of the ink source roller without a gap, the ink amount can be changed depending on the position of the length direction of the ink source roller, that is, the width direction of the printing surface. it can.

A fulcrum member made of a permanent magnet having a cylindrical attracting surface is fixed to the ink fountain member, and an ink groove adjusting member made of a magnetic material is formed with a groove having an arcuate cross section which is in close contact with the attracting surface of the fulcrum member. Therefore, if the fulcrum portion is integrally provided, the structure of the ink amount adjusting member is very simple, and the resistance of rotation of the ink amount adjusting member is extremely small. Further, if a groove having an arcuate cross section is formed in a portion of the ink fountain member made of a magnetic material, and a part of the cylindrical fulcrum member is fitted in the groove and is attracted and supported by magnetic force, the ink fountain member Fixing the fulcrum member is also extremely easy.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a main part of an ink supply device of a printing machine showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially cutaway side view of the main part of FIG. 1, showing a state in which the ink passages are open during printing.

FIG. 4 is a partially cutaway side view of the main part of FIG. 1 showing a state where the ink passage is closed during printing.

5 is a partially cutaway side view of the main part of FIG. 1 showing one state during cleaning.

FIG. 6 is a partially cutaway side view of the main part of FIG. 1 showing another state during cleaning.

[Explanation of symbols]

 (1) Ink source roller (4) Frame (5) Ink fountain member (6) Ink amount adjusting member (8) Ink fountain member groove (9) Support member (9a) Adsorption surface (10) Ink amount adjusting member groove (11) Support point (16) Spring (elastic member) (17) Suction part (18) Electromagnet (23) Ink passage

Claims (4)

[Claims] 1. An ink amount adjusting member constituting an ink fountain,
Attached to the ink fountain member attached to the frame so that it can be switched between a closed position that contacts the ink source roller and closes the ink passage between it and the open position that opens the ink passage away from the ink source roller In the ink supply device of the existing printing machine, the fulcrum member using a permanent magnet is fixed to the ink fountain member,
A fulcrum part and a suction part made of a magnetic material are integrally provided on the ink amount adjusting member, and the fulcrum part of the ink amount adjusting member is rotatably adsorbed and supported by the fulcrum member by a magnetic force to attach the ink amount adjusting member in the closing direction. An ink supply device for a printing press, wherein an elastic member that urges and an electromagnet that attracts a suction portion of the ink amount adjusting member in an opening direction against the elastic force of the elastic member are provided in the ink fountain member. 2. The ink supply device for a printing press according to claim 1, wherein a plurality of ink amount adjusting members are arranged side by side in the length direction of the ink source roller without a gap. 3. A fulcrum member made of a permanent magnet having a cylindrical attraction surface is fixed to an ink fountain member, and an ink amount adjusting member made of a magnetic material is formed with a groove having an arcuate cross section which is in close contact with the attraction surface of the fulcrum member. The ink supply device for a printing press according to claim 1 or 2, wherein the fulcrum portion is integrally provided by being formed. 4. A groove having an arc-shaped cross section is formed in a portion made of a magnetic material of an ink fountain member, and a part of a cylindrical fulcrum member is fitted in the groove to be attracted and supported by a magnetic force. The ink supply device for a printing press according to claim 3.