JPH0899399A - Circular pressure type printing press - Google Patents

Abstract

PURPOSE: To prevent the generation of printing register deficiency or a gear mesh like printing image error in a printing image by suppressing the shakaing in a printing width direction and the generation of a backlash phenomenon. CONSTITUTION: A printing stand 8 linearly and horizontally movable under a printing cylinder 3 along a guide 1, the oblique tooth-shaped gears 2, 2 integrally provided to both end parts of the printing stand 8 in a printing width direction, the oblique tooth-shaped auxiliary gears 6, 6 rotating in the state meshed with the rack gears 2, 2 and the oblique tooth-shaped cooperation rotary pinion gears 4, 4 meshed with the rack gears 2, 2 to rotate are provided and the cooperation rotary pinion gears 4, 4 are attached to both end parts of the printing cylinder in a rotary axis direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter coloring pattern printing, a conductive ink / paste pattern printing, a pixel cell pattern printing for a plasma display / liquid crystal display, an alignment film for a liquid crystal display, and the like. The present invention relates to a circular pressure type printing apparatus used as a printing apparatus for intaglio offset printing in thick film printing or overcoat printing.

[0002]

2. Description of the Related Art Generally, a circular pressure printing apparatus prints by reciprocally and linearly reciprocating a horizontal surface plate and a roll-shaped rotating body facing each other. After the supply, the printing plate or the substrate to be printed is moved between the horizontal surface plate and the roll-shaped rotating body while being pressed, and the printing ink supplied to the printing plate is fed directly or by a blanket surface (rubber elastic surface). ) Is used to perform printing by transferring the material to the printing medium by an offset method.

As shown in the schematic side view of FIG. 3A and the schematic plan view of FIG. Part) is provided with a linear guide 1 (for example, a rail or a groove), is fitted to the guide 1 in a fitted state, and extends along the guide 1 in a horizontal linear direction (printing operation direction indicated by an arrow). In addition, a printing base 8 that is linearly movable is provided.

On the printing base 8, linear rack gears 2 and 2 are provided on both sides parallel to the moving direction, and a horizontal printing base is provided on the printing base 8 between the rack gears 2 and 2. A board 7 is provided, and a printing plate, an object to be printed (printing sheet, etc.), a printing ink receiving stand, etc. (not shown) are placed and fixed on the printing base board 7.

A rotary shaft 3a is provided on the printing base 8 so as to oppose the horizontal printing base plate 7 on the printing base 8 at appropriate intervals (at least a distance corresponding to the thickness of the printing plate or the thickness of the material to be printed). A printing cylinder 3 rotatable about the center is provided.
Is provided with interlocking (transmission) rotation pinion gears 4 and 4 respectively meshing with the rack gears 2 and 2 at both ends in the rotation axis direction, and the rack gears 2 and 2 are interlocked with the interlocking rotation pinion by the horizontal movement operation of the printing platform 8. Rotate the gears 4 and 4,
The printing cylinder 3 is rotated.

The movement of the printing base 8 is performed, for example, by using a tow line (chain, wire, etc.) connected to the printing base 8 or a ball screw shaft (not shown) screwed to the printing base 8 with an electric motor or the like. Driven by a drive source (not shown) to move along the guide 1, or
Alternatively, it is driven and moved along the guide 1 by being driven by an air pressure or hydraulic cylinder connected to the printing frame 8.

Further, as shown in FIGS. 3 (a) and 3 (b), the moving operation of the printing frame 8 is performed by a drive source (not shown) such as an electric motor to rotate the rotary shaft 3b and the printing cylinder. 3 is rotated, and the pinion gears (interlocking rotation pinion gears 4a) attached to both ends of the printing cylinder 3 are engaged with the rack gears 2 and 2 to be rotated to move along the guide 1. Or each of the rack gears 2,
2, driving pinion gears 9, which can be driven and rotated about a rotating shaft 9b by a driving source such as an electric motor,
9, and the pinion gears 9, 9 are moved along the guide 1 by the drive rotation of the pinion gears 9.

The rotary shaft 3a of the printing cylinder 3 and the rotary shaft 9b of the driving pinion gears 9 and 9 are provided on the frame F of the apparatus main body.
Are rotatably supported by side frames F ₁ and F ₁ provided on both sides of the bearing via bearings.

[0009]

As shown in the schematic plan view of FIG. 3 (b), the above-mentioned conventional pressure type printing apparatus is integrally provided on both sides of the printing frame 8 which moves along the guide 1. Gear teeth 2a of each rack gear 2 and each rack gear tooth 2
The gear teeth 9a of each drive pinion gear 9 (spur gear) and the gear teeth 4a of each interlocking rotation pinion gear 4 (spur gear) that mesh with a are arranged in the traveling direction of the printing base 8 (longitudinal direction of the rack gear 2). On the other hand, it is a flat gear tooth (flat tooth) engraved in the direction of 90 °.

In such a conventional pressure type printing apparatus, a thrust direction (that is, a printing width direction) orthogonal to a moving direction (printing direction) indicated by an arrow of the printing frame 8 which is a direction in which the gear teeth are engraved. To a small degree (for example, ± 1/100 mm ~
Vibrations or rocking phenomenon (irregular movement in the lateral direction) of ± 10/100 mm or more) are likely to occur during printing operation, and the movement of the printing platform 8 due to mutual meshing clearance of each gear tooth progresses. A backlash phenomenon or the like, which causes swinging or vibration in a certain direction, is likely to occur.

Therefore, the angle formed by the advancing direction of the printing frame 8 and the tooth trace of each gear tooth in each of the rack gears 2, each of the drive pinion gears 9 meshing with each of the rack gears 2, and each of the interlocking rotation pinion gears 4 θ is, for example, 60 ° ≦ θ ≦
In some cases, the gear teeth are set at 80 ° and helical gears are used to suppress vibration and oscillation in the print width direction and print direction as much as possible.

However, since the interlocking rotation pinion gears 4 and 4 and the driving pinion gears 9 and 9 are used for interlocking rotation and driving rotation, respectively, the gears in the case of vibration or rocking are generated. The mesh adjustment is troublesome, and the printing frame 8 is supported by the helical gears at four points, namely, the left and right pinion gears 4 and 4 with respect to the rack gears 2 and 2, and the driving pinion gears 9 and 9. However, it may not be possible to suppress the above-mentioned vibration and swing.

Such a vibration or rocking phenomenon during printing operation causes a print registration defect in the print width direction, a print registration defect in the print direction, or a gear-like pattern in the print image printed on the printing medium. It is likely to cause a print image error and deteriorate print quality.

According to the present invention, by suppressing the swinging in the print width direction and the occurrence of the backlash phenomenon, it is possible to prevent the print image from having a defective print registration or a gear-shaped print image error. Especially.

[0015]

A first aspect of the present invention is to provide a printing base 8 which is horizontally movable linearly below a printing cylinder 3 along a guide 1, and both ends of the printing base 8 in a printing width direction. Rack gears 2 and 2 integrally formed on the above-mentioned section, and beveled tooth-shaped interlocking gears that mesh with the rack gears 2 and 2 at both ends in the rotation axis direction of the printing cylinder 3 that rotates at a fixed position and that interlock with each other. Auxiliary pinion gear 6, which is provided with rotating pinion gears 4 and 4 and meshes with the rack gears 2 and 2 to rotate at a fixed position.
6 is a circular pressure type printing apparatus having one to several places.

Next, in the second aspect of the present invention, the printing rack 18 fixed in a fixed position, and the rack gears 12, 12 in the form of oblique teeth integrally provided at both ends of the printing rack 18 in the printing width direction.
And a gear-shaped interlocking gear that interlocks with the rack gears 12 and 12 at both ends in the rotation axis direction of the printing cylinder 13 that is supported by a movable frame that can be linearly horizontally moved along the guide 11 and rotates. And a pinion gear for rotation 14, which is rotatably supported by the movable frame.
Auxiliary pinion gear 16 in the form of a helical tooth that meshes with 2 to rotate
The pressure-type printing apparatus is provided with 16 at one to several places.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG.
Detailed description will be given below according to the embodiment shown in the schematic side view of (a) and the schematic plan view of FIG. 1 (b).

Linear rail-shaped guides 1 and 1 (or linear concave groove-shaped guides (not shown)) may be provided on both sides (or center portion) of the printing apparatus main body base frame F.

The printing frame 8 is mounted on the guide 1 in a fitted state, and is linearly movable along the guide 1 in a horizontal linear direction (printing operation direction indicated by an arrow).

Linear rack gears 2 and 2 are provided on both sides of the printing frame 8 in parallel to the moving direction thereof, and the gear teeth 2h formed on the rack gears 2 and 2 at equal pitches are As shown in FIG. 1B, an angle in the horizontal plane formed by the longitudinal direction of the rack gear 2 and the direction of each gear tooth 2h is an angle θ (45 ° ≦ θ <90 ° or, for example, 60 ° ≦).
The helical gear is formed in a spiral tooth shape so that θ ≦ 80 °).

A horizontal printing base board 7 is provided on the printing base 8 between the rack gears 2 and 2. On the printing base board 7, although not shown, a printing plate, an object to be printed (printing sheet or the like). As a part of the printing ink supply mechanism, for example, a printing ink receiving stand or the like is placed and fixed.

The rack gears 2 and 2 mesh with the auxiliary pinion gears 6 and 6 rotatable about the rotary shaft 6b at one position (see FIGS. 1 (a) and 1 (b)) or at several positions. Each gear tooth 6h formed at an equal pitch on the gear 6 (the angle θ formed by the tooth trace of the gear tooth 6h with respect to the direction orthogonal to the rotation axis direction of the gear 6 is 45 ° ≦ θ <90 ° or, for example, 60 ° ≦ θ ≦ 80 °) is a helical gear having an oblique tooth shape that smoothly meshes with the gear tooth 2h of the rack gear 2.

The auxiliary pinion gear 6 in the present invention
6, or the auxiliary pinion gears 6, 6 including the rotary shaft 6b may be rotated by meshing with the rack gears 2, 2 and used as a power transmission to another rotary system, or an electric motor. It may be used as a power source for driving and moving the printing rack 8 by driving and rotating the auxiliary pinion gears 6 and 6 itself, or simply rotating without using as a power transmission or driving source. But it's okay.

The moving operation of the printing base 8 is the same as in the conventional case.
For example, a tow line (chain, wire, etc.) connected to the printing base 8 or a ball screw shaft (not shown) screwed to the printing base 8 is driven by an electric motor source and driven along the guide 1. It can be appropriately carried out by moving it, or driving it along the guide 1 by driving it by a pneumatic or hydraulic cylinder connected to the printing stand 8.

As an embodiment of the first invention, FIG.
As shown in (b), for example, the auxiliary pinion gears 6, 6 can be driven and rotated about the rotation shaft 6b by a drive source such as an electric motor, and the auxiliary pinion gears 6, 6 are driven and rotated by meshing with the rack gears 2, 2. A method of moving the printing platform 8 along the guide 1 by the auxiliary pinion gears 6 and 6 will be described in detail below.

The rack gears 2, 2 mesh with auxiliary pinion gears 6, 6 which can be driven and rotated about a rotary shaft 6b by a drive source such as an electric motor, and the gears 6 are formed at equal pitches. The tooth 6h (the angle θ formed by the tooth trace of the gear tooth 6h with respect to the direction orthogonal to the rotation axis direction of the gear 6 is 45 ° ≦ θ
<90 ° or, for example, 60 ° ≦ θ ≦ 80 °) is a helical gear having a beveled tooth shape that smoothly meshes with the gear teeth 2h of the rack gear 2, and the auxiliary pinion gears 6 and 6 rotate in the forward or reverse direction. The printing frame 8 linearly reciprocates along the guide 1 by switching and rotating in the respective directions.

On the printing base 8 is provided a rotatable printing cylinder 3 facing the horizontal printing base plate 7 on the printing base 8 and rotating about a rotation axis 3a. On both ends in the axial direction, there are provided interlocking (transmission) rotation pinion gears 4 and 4 that mesh with the rack gears 2 and 2, respectively, and gear teeth 4h (gear 4) formed at equal pitches on the gears 4 and 4.
The angle θ formed by the tooth trace of the gear tooth 4h with respect to the direction orthogonal to the rotation axis direction of 45 ° ≦ θ <90 ° or, for example, 60 °
(° ≦ θ ≦ 80 °) is a helical gear in the form of a bevel that meshes with the gear teeth 2h of the rack gear 2.

When the printing base 8 moves along the guide 1 (moves by driving and rotating the auxiliary pinion gear 6), the rack gears 2 and 2 of the printing base 8 interlock with the interlocking rotation pinion gears 4 and 4. This causes the printing cylinder 3 to rotate.

In the case of offset printing, the printing cylinder 3 is used as a transfer cylinder on the circumference of the printing cylinder 3. Therefore, as shown in FIGS. 1 (a) and 1 (b), the elasticity for ink transfer is used. A flexible blanket 5 (elastic sheet mainly composed of rubber, elastic sheet mainly composed of silicone resin, etc.) is wound or lined.

Alternatively, on the circumference of the printing cylinder 3, in the case of direct printing, the printing cylinder 3 is used as an impression cylinder or a plate cylinder.

A rotary shaft 6b having the auxiliary pinion gears 6 and 6 fixed thereto, and a rotary shaft 3a having the printing cylinder 3 fixed thereto.
Are rotatably supported by side frames F ₁ and F ₁ provided on both sides of the apparatus body frame F via bearings, and the rotary shaft 6b is driven and rotated by an electric motor (servo motor, pulse motor, etc.). Then, it is controlled by a controller that controls the rotation speed and rotation direction of the electric motor, and is driven and rotated in the forward rotation direction and the reverse rotation direction. In addition, in the pressure type printing apparatus according to the first aspect of the present invention, in addition to the above-described method, the printing frame 8 is moved by rotating the rotary shaft 3b and the printing cylinder 3 with a drive source such as an electric motor. You may make it move along the guide 1 by engaging the pinion gears (pinion gear 4a for interlocking rotation) 4a attached to both ends of the body 3 with the said rack gears 2 and 2, and rotating them.

Next, the second aspect of the present invention will be described in detail below with reference to the embodiment shown in the schematic side view of FIG. 2A and the schematic plan view of FIG. 2B.

On both sides (or in the center) of the printing apparatus main body base frame F, linear rail-shaped guides 11, 11 are provided.
(Although not shown, a linear groove guide may be used)
Equipped with.

The movable frame F ₂ is the apparatus main body frame F.
Movable side frames F ₃ on both sides and both frames F ₃ , F
A support frame F ₄ that integrally connects the _three is provided, and is installed so as to straddle the upper side of the printing apparatus main body base frame F.

Both side frames F ₃ and F ₃ of the movable frame F ₂ are attached to the guide 1 in a fitted state, and can move horizontally along the guide 1 in a straight line direction (printing operation direction indicated by an arrow). Is.

The printing frame 18 is fixedly mounted on the apparatus body frame F, and both sides of the printing frame 18 are
Equipped with linear rack gears 12, 12 in parallel,
As shown in FIG. 2B, the gear teeth 12h formed on the rack gears 12 and 12 at equal pitches have the same shape.
The angle in the horizontal plane formed by the longitudinal direction of the gear teeth and the direction of each gear tooth 12h is the angle θ (45 ° ≦ θ <90 ° or 60, for example).
The helical gear is formed in an oblique tooth shape so that (° ≦ θ ≦ 80 °).

Printing rack 1 between the rack gears 12 and 12
A horizontal printing base plate 17 is provided on the printing base plate 8. On the printing base plate 17, although not shown, a printing plate, an object to be printed (printing sheet, etc.), and a part of a printing ink supply mechanism,
For example, a printing ink receiving stand or the like is placed and fixed.

The printing cylinder 13 is rotatably supported on the movable frame F ₂ via a rotary shaft 13a.
Is a horizontal printing base plate 1 on a fixed printing stand 18.
7 to rotate about the rotary shaft 13a to face the printing cylinder 1
Pinion gears for interlocking (transmission) rotation 1 meshing with the rack gears 12 and 12, respectively, at both ends in the rotation axis direction of
Gear teeth 14h formed at equal pitches on the gears 14, 14 (the angle θ formed by the tooth trace of the gear teeth 14h with respect to the direction orthogonal to the rotation axis direction of the gear 14 is 45 °).
≦ θ <90 ° or 60 ° ≦ θ ≦ 80 °) is a helical gear having an oblique tooth shape that meshes with the gear tooth 12h of the rack gear 12.

The movement of the movable frame F _2, for example, tow (chain connected to the movable frame F _2,
Wire or the like) or a ball screw shaft or the like (not shown) screwed to the movable frame F ₂ is driven and moved along the guide 11 by an electric motor source, or is connected to the movable frame F ₂ . It can be appropriately implemented by being driven by an air pressure or hydraulic cylinder to be driven and moved along the guide 11.

As an embodiment of the second invention, FIG.
As shown in (b), for example, a rack gear attached to a printing base 18 in a fixed state by providing auxiliary pinion gears 16 and 16 rotatably about a rotation shaft 16b by a drive source such as an electric motor. A method of moving the movable frame F ₂ along the guide 11 by the auxiliary pinion gears 16 and 16 that are driven and rotated by meshing with 12 and 12 will be described in detail below.

The movable frame F ₂ is provided with one or more auxiliary pinion gears 16 (see FIGS. 1 (a) and 1 (b)) which can be rotated around a rotary shaft 16b by a drive source such as an electric motor. And the auxiliary pinion gear 16 meshes with the rack gears 12 and 12, and the gear teeth 16h are formed on the gear 16 at equal pitches (the gear teeth 16h with respect to the direction orthogonal to the rotation axis direction of the gear 16). Angle θ of the tooth trace of
Is 45 ° ≦ θ <90 ° or, for example, 60 ° ≦ θ ≦ 80
Is a helical gear in the form of a bevel tooth that smoothly meshes with the gear teeth 12h of the rack gear 12, and the auxiliary pinion gears 16 and 16 are switched to rotate in the forward rotation direction or the reverse rotation direction, respectively. The movable frame F ₂ linearly reciprocates along the guide 1.

When the movable frame F ₂ is moved by the driving rotation of the auxiliary pinion gear 16, the interlocking rotation pinion gears 14, 14 meshing with the rack gears 12, 12 of the fixed printing rack 18 are interlockedly rotated, This causes the printing cylinder 13 to rotate.

In the case of offset printing, since the printing cylinder 13 is used as a transfer cylinder on the circumference of the printing cylinder 13, as shown in FIGS. 1 (a) and 1 (b), elasticity for ink transfer is provided. A flexible blanket 5 (elastic sheet mainly composed of rubber, elastic sheet mainly composed of silicone resin, etc.) is wound or lined.

Alternatively, on the circumference of the printing cylinder 13, in the case of direct printing, the printing cylinder 13 is used as an impression cylinder or a plate cylinder.

A rotary shaft 16b having the auxiliary pinion gears 16 and 16 fixed thereto and a rotary shaft 13a having the printing cylinder 13 fixed thereto are movable side frames F ₃ and F ₃ provided on both sides of the apparatus main body frame F, respectively. Is rotatably supported by a bearing, and the rotating shaft 16b is driven and rotated by an electric motor (servo motor, pulse motor, etc.), and is controlled by a controller that controls the rotation speed and rotation direction of the electric motor. , Are controlled to rotate in the forward and reverse directions and rotate. In the pressure type printing apparatus of the second invention of the present invention, the movable frame F ₂ is moved by a drive source such as an electric motor in addition to the above method.
3b and the printing cylinder 13 are rotated, and pinion gears (interlocking rotation pinion gears 14a) attached to both ends of the printing cylinder 13 are meshed with the rack gears 12 and 12 and rotated to move along the guide 11. You may make it operate.

The pressure type printing apparatus according to the first aspect of the present invention includes:
In the vicinity of the printing cylinder 3, a printing ink supply mechanism composed of an ink squeegee plate, a doctor blade, and the like is installed side by side in a downward direction toward the printing base plate 7 while being supported by the side frame F ₁ . Further, in the pressure type printing apparatus of the second invention, a printing ink supply mechanism composed of an ink squeegee plate, a doctor blade and the like is provided in the vicinity of the printing cylinder 13 so as to face downward toward the printing base plate 17 and a movable side frame F ₁ It is supported by and is installed side by side.

Incidentally, the structure of the printing ink supply mechanism in the pressure type printing apparatus of the first invention or the second invention is not particularly limited, and a roll-shaped printing plate cylinder, a flat printing platen, and a roll are used. Direct printing machine using a plate-shaped printing cylinder and a flat printing plate, or an intaglio offset printing machine using a roll-shaped printing cylinder (blanket) and a flat printing plate and printing plate For example, a known printing ink supply mechanism used for a known circular pressure type printing apparatus such as an offset type circular pressure type printing machine can be adopted.

[0048]

The circular pressure type printing apparatus according to the first aspect of the present invention comprises the rack gears 2 and 2 integrally provided at both ends of the printing frame 8 in the printing width direction, and the auxiliary pinion that meshes with the rack gears 2 and 2 to rotate. Since the gears 6 and 6 and the interlocking rotation pinion gears 4 and 4 which mesh with the rack gears 2 and 2 and rotate in conjunction with each other are of helical gear type having an oblique tooth shape, each gear tooth has a tooth trace ( The meshing starts gradually from one end of the gear tooth peaks and valleys.

Therefore, the meshing between the rack gear 2 (pitch circle line L having an infinite radius) and the cylindrical pinion gears 6 and 4 (pitch circle tangent line M) in the interlocking movement system when the printing platform 8 is moved. The clearance (distance D between the pitch circles) can be made closer than in the case of the conventional spur gear meshing.

The gears 2, 6 and 4 have an angle θ (45 ° ≦ θ <90 ° or 60 ° ≦, for example) with respect to the printing direction.
Since the helical gear type is a helical gear that is inclined at θ ≦ 80 °), the printing rack 8 in the printing width direction orthogonal to the printing direction is used.
Vibration and swinging are restricted and suppressed by mutual gear teeth that mesh obliquely with respect to the printing direction, and the printing rack 8 vibrates irregularly in a direction orthogonal to the printing direction (print width direction). It can reduce the phenomenon of rocking and rocking.

Further, since the gears 2, 6 and 4 are of helical gear type having a beveled tooth shape, the meshing gradually starts from one end of each tooth trace (the peak portion and the valley portion of the gear tooth), and therefore the meshing is caused. Since the impact is alleviated and the meshing clearances between them can be made closer to each other than in the case of the conventional spur gear, the occurrence of a backlash phenomenon can be suppressed, and the printing frame 8 vibrates irregularly in the printing direction. The phenomenon of rocking can be reduced.

The second embodiment of the present invention is a pressure type printing apparatus in which the rack gears 12 and 12 integrally provided at both ends of the printing rack 18 in the printing width direction and the auxiliary pinion that meshes with the rack gears 12 and 12 to rotate. Since the gears 16 and 16 and the interlocking rotation pinion gears 14 and 14 that are interlocked with the rack gears 12 and 12 and rotate in conjunction with each other are of the helical gear type having an oblique tooth shape, each gear tooth has a tooth trace of each other at the time of meshing ( The meshing starts gradually from one end of the gear tooth peaks and valleys.

Therefore, when the movable frame F ₂ is moved, the rack gear 12 (pitch circle line L having an infinite radius) and the cylindrical pinion gears 16 and 1 of the interlocking movement system.
The meshing clearance (distance D between pitch circles) with 4 (pitch circle tangent line M) can be made closer than in the case of meshing of a conventional spur gear.

Further, each gear 12, 16, 14 is a helical gear type in the form of an oblique tooth which is inclined at an angle θ (45 ° ≦ θ <90 ° or 60 ° ≦ θ ≦ 80 °) with respect to the printing direction. Therefore, the vibration and swing of the movable frame F _{2 in} the printing width direction orthogonal to the printing direction are restricted and suppressed by the mutual gear teeth that mesh obliquely with the printing direction, and the printing direction of the movable frame F ₂ is suppressed. It is possible to reduce the phenomenon of irregular vibration or swing in a direction (print width direction) orthogonal to the direction.

Further, since the gears 2, 6 and 4 are of helical gear type having a beveled tooth shape, the meshing gradually starts from one end of each tooth trace (the peak portion and the valley portion of the gear tooth), and therefore the meshing is caused. Since the impact is alleviated and the meshing clearances between them can be made closer to each other than in the case of the conventional spur gear, the occurrence of a backlash phenomenon can be suppressed, and the printing frame 8 vibrates irregularly in the printing direction. The phenomenon of rocking can be reduced.

[0056]

According to the pressure type printing apparatus of the present invention, the phenomenon of irregular vibration or rocking in the printing width direction orthogonal to the printing direction (moving advancing direction) of the printing frame or the movable frame is reduced. In addition, it is possible to reduce the phenomenon that the printing frame or the movable frame vibrates or swings irregularly in the printing direction (moving direction), and the print image has defective print registration or gear-shaped print image error. It has the effect of preventing this.

[Brief description of drawings]

FIG. 1A is a schematic side view of a circular pressure type printing apparatus of the first invention, and FIG. 1B is a schematic plan view of a circular pressure type printing apparatus of the first invention.

FIG. 2A is a schematic side view of a circular pressure type printing apparatus of the second invention, and FIG. 2B is a schematic plan view of the circular pressure type printing apparatus of the second invention.

FIG. 3A is a schematic side view of a conventional pressure type printing apparatus,
FIG. 1B is a schematic plan view of a conventional pressure printing device.

[Explanation of sign]

1, 11 ... Guide 2, 12 ... Rack gear 2a ... Spiral gear tooth 2h, 12h ... Bevel gear tooth 3, 13 ... Printing cylinder 3
a, 13a ... Rotating shafts 4, 14 ... Interlocking rotary pinion gears 4a ... Spiral gear teeth 4h, 14h ... Bevel gear teeth 5 ... Blanket 6, 16 ... Auxiliary pinion gear 6a ... Spiral gear teeth 6b, 16b … Rotating shafts 6h, 16h… Bevel gear teeth
7, 17 ... Printing base board 8, 18 ... Printing rack 9 ... Driving pinion gear 9a ...
Spur-toothed gear teeth F ... apparatus body frame F ₁ ... side frame F ₂ ...
Movable frame F ₃ … Movable side frame F ₄ … Support frame D… Mating pitch circle distance L… Pitch circle line
M: Pitch circle tangent line θ: Bevel gear tooth angle

Claims (3)

[Claims] 1. A printing rack 8 which is linearly horizontally movable below a printing cylinder 3 along a guide 1, and a beveled rack gear integrally provided at both ends in the printing width direction of the printing rack 8. 2, 2
And pinion gears 4 and 4 for interlocking rotation in the form of oblique teeth that mesh with the rack gears 2 and 2 and rotate in conjunction with each other at both ends in the rotation axis direction of the printing cylinder 3 that rotates at a fixed position. A circular pressure type printing apparatus, characterized in that auxiliary pinion gears 6, 6 in the form of beveled teeth that mesh with 2 and rotate at a fixed position are provided at one or several places. 2. A printing base 18 fixed in a fixed position, rack gears 12, 12 having oblique teeth integrally provided at both ends in the printing width direction of the printing base 18, and linearly along a guide 11. The rack gears 12, 1 are provided at both ends in the rotation axis direction of the printing cylinder 13 which is supported by a horizontally movable movable frame and rotates.
2 and an interlocking pinion gear 14 for interlocking rotation which interlocks with 2 to rotate in an interlocking manner, and an auxiliary pinion gear 16 for interlocking rotation, which is pivotally supported by the movable frame and rotates in mesh with the rack gears 12, 12. , 16 are provided at one to several places, and a pressure type printing apparatus is provided. 3. The auxiliary pinion gears 6, 6 or the auxiliary pinion gears 16, 16 are used for suppressing vibration / swing in the printing width direction or the printing direction, and are used for interlocking and driving. Not claim 1 or claim 2
The pressure printing device described.