JPH0612440B2 - Drawing head of automatic drawing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is intended to engrave a peel-off film in a photoengraving process to create a cut mask, or to scribe a scribe sheet to form a ruled plate for a business form or the like. Automatically used to create a flexo printing plate by making a score line on a rubber plate material, or cutting a cardboard and making a ruled line with a roller to create a package sample. A drawing head of a drawing machine.

[Conventional technology]

To create a cut mask or ruled block using an automatic drawing machine, attach a drawing blade (cutter blade or sliver blade) to the lower end of the drawing axis and rotate the drawing axis to the drawing head. While freely holding and moving the drawing head in the X and Y directions, a peel-off film, a scribe film or the like placed on a surface table is cut from the upper surface side and carved into a desired shape. In the cutting operation, the drawing blades are not limited to the double-edged blade shown in FIG. 5 and the single-edged blade shown in FIG.
In the front view shown in (A), it can be moved in the direction of each arrow to cut and cut the work piece. Therefore, in addition to moving the drawing axis up and down in order to push the drawing blade with a predetermined depth of cut into the workpiece, the drawing blade is
As shown in (A), it is necessary to control the rotation of the drawing axis so that it always faces the cutting direction. For this reason, when attaching the drawing shaft to the drawing head, it is necessary to keep the drawing blade in a predetermined direction and engage the operation end of the rotation control mechanism.

Here, in the case of an automatic drawing machine equipped with a ball-point pen, hollow pen, or fiber pen in the drawing head,
Since it is not necessary to control the rotation of these drawing tools during drawing work, multiple drawing tools with different pen tip thickness and color are mounted on the drawing head itself, and they are automatically replaced. Drawing lines with different line widths and colors is relatively easy with a color plotter. However, in the case of an automatic drawing machine equipped with a drawing axis having a drawing blade, as described above, it is necessary to control the rotation of the drawing axis, which requires engagement and disengagement with the operating end of the rotation control mechanism. Therefore, installing multiple drawing axes, each equipped with different types of drawing blades, in the drawing head and automatically replacing them is the same as with the ballpoint pen and hollow pen described above. It's not easy.

Therefore, conventionally, as disclosed in, for example, Japanese Patent Application No. 61-261521 and drawings, only one drawing shaft is attached to the drawing head, and the drawing shaft is moved up and down and rotated. It was a structure connected to the control mechanism. Or, at most, two drawing axes equipped with different kinds of drawing blades are mounted on a drawing head, and a vertical movement mechanism and a rotation control mechanism are provided for each drawing axis, and they are used in a switching manner. Met. When performing different cutting work with different types of drawing blades, prepare an automatic drawing machine separately and use it, or attach or remove the drawing axis to or from the drawing head by the operator's hand. Or, the drawing head itself was replaced. Further, even when the drawing blade is worn or broken, the worker detaches the drawing shaft from the drawing head and attaches the spare drawing shaft to the drawing head.

[Problems to be solved by the invention]

However, it is extremely uneconomical to use the automatic drawing machine properly for each type of work. Further, it is very troublesome for an operator to manually attach / remove the drawing shaft to / from the drawing head or replace the drawing head itself.
It is to be noted that a plurality of drawing axes equipped with different kinds of drawing blades are held by a holder or the like at an appropriate position on the surface plate table of the automatic drawing machine, and the drawing axes are arranged between the drawing axis and the drawing head. It is not impossible to automate the replacement work of
The system becomes very complicated and expensive.

This invention was made in view of the above circumstances,
The drawing head itself holds a plurality of drawing axes, the necessary drawing axes can be selected and replaced automatically, or a spare drawing axis can be automatically replaced.
A technical problem is to provide a device in which the exchanged drawing shaft is immediately placed in a state in which the rotation control mechanism can control the rotation.

[Means for solving problems]

The present invention achieves the above object by configuring the drawing head of the automatic drawing machine as follows. That is, the drawing head of the present invention holds the drawing blade at the lower end, the gripping portion is formed at the upper end, and the engaging shaft is provided at the side, and the drawing shaft is rotated. A plurality of bearings that support freely and slidably in the axial direction are evenly distributed in the circumferential direction, and the bearings are rotatable so that each bearing revolves around the center of the circle where the bearings are arranged. A turret supported by the turret, rotation control means for controlling the rotation of the turret, an engagement member that engages and disengages with the engaging portion by rotating the drawing shaft by a predetermined angle, and the turret A gripping means for gripping the gripping part of the drawing shaft supported by the bearing at the drawing position among the plurality of bearings is provided, and the gripping part controls the rotation of the drawing shaft held by the gripping part. The rotation control mechanism and the rotation control mechanism and the turret are in the drawing position. It is constituted by a engaging and disengaging drive means for engaging and disengaging the said grip portion and said gripping means and drawing shaft which is supported by the receiving portion is relatively moved.

[Action]

In the drawing head having the above structure, the plurality of drawing shafts are
The bearings are supported by bearings of the turret, and the engaging portions of the side portions are engaged with the engaging members to be held by the common turret. Then, when performing the cutting operation, the turret is rotated by the rotation control means,
The drawing shaft to be used is rotationally transferred to the drawing position. At this time, since the drawing shaft that has been transferred to the drawing position is maintained in the same attitude by engaging the engaging member protruding on its side with the engaging member, the drawing shaft is always drawn in the same attitude. It stops at the position and the drawing blade at the lower end always faces in a fixed direction. When the required drawing shaft stops at the drawing position, the engagement / disengagement driving means relatively moves the rotation control mechanism and the drawing shaft, and the gripping means of the rotation control mechanism causes the gripping part of the drawing shaft to move. To be gripped. At this time, as described above, the drawing shaft always takes a fixed posture, so that the gripping operation is simplified. When the rotation control mechanism and the drawing shaft at the drawing position are connected, the drawing shaft is rotated by a predetermined angle by the rotation control mechanism, and the engaging portion of the drawing shaft is disengaged from the engaging member. The cutting work is ready. At this time, as described above, since the drawing blade of the drawing shaft always faces a fixed direction, the direction of the drawing blade at the time of starting the rotation control is guaranteed, and the control can be performed. The drawing shaft body is supported by the bearing portion, and is rotated by a rotation control mechanism in accordance with the movement of the drawing head in the X and Y directions, and a cutting operation is performed on the peel-off film or the like.

Further, when exchanging the drawing shaft, the rotation control mechanism rotates the drawing shaft connected to the drawing shaft to return the drawing shaft to the state at the start of control once, and then the drawing shaft is further rotated by a predetermined angle. The drawing shaft is engaged so that the engaging portion of the drawing shaft engages with the engaging member. Then, the engagement / disengagement driving means relatively moves the rotation control mechanism and the drawing shaft body so that the gripping means of the rotation control mechanism is disengaged from the grip portion of the drawing shaft body. After that, the above operation is repeated.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 4 show an embodiment of the present invention.
The drawing is a partial perspective view showing the main part of the drawing head of the automatic drawing machine, FIG. 2 is an overall perspective view of the drawing head, FIG. 3 is a perspective view showing the drawing shaft, and FIG. 4 is a part of the drawing head. It is a partial perspective view showing the state which looked up from diagonally downward. 1 and 4 are partially omitted for convenience of illustration.

First, the structure of the drawing shaft will be described with reference to FIG. The drawing shaft body 10 detachably holds a drawing blade 14 at the lower end of the large-diameter shaft portion 12, and has an upper end portion of a small-diameter shaft portion 16 integrally formed with the large-diameter shaft portion 12 so that its axis coincides. The gripping body 18 is fixedly attached to this. On the upper surface of the gripping body 18, a gripping portion 20 extending in parallel with the axes of the shaft portions 12 and 16 and eccentrically extending from the shaft portions 12 and 16 is formed. The grip 20 has an elongated quadrangular prism shape having a square cross section. Bearings (engagement portions) 22 and 23 are provided on one side of the grip body 18 so as to project therefrom. Further, the small-diameter shaft portion 16 is fitted with an engaging body 24 slidably around its axis, and the engaging body 24
Coil spring between the lower surface of the shaft and the upper stepped portion of the large-diameter shaft portion 12.
26 is externally fitted, and the engaging body 24 slides downward against the elastic force of the coil spring 26, so that a downward urging force is applied to the large-diameter shaft portion 12, and thus the drawing blade 14 at its lower end. Is configured to exert. An engaging plate-like portion 28 and an engaging rod 29 on the opposite side thereof are formed on the engaging body 24.

Next, the structure of the drawing head for mounting and holding a plurality of the drawing shafts 10 will be described. As shown in FIGS. 1 and 2, the drawing head 30 supports a drawing shaft body 10 by its large-diameter shaft portion 12 slidably and rotatably in its axial direction.
A turret 34 having an upper surface supporting a single linear rotary bearing (bearing portion) 32 is provided. The linear rotary bearings 32 are evenly arranged in the circumferential direction, and a rotating strut shaft 36 is integrally provided with the turret 34 at the center of the disposition circle, and the turret 34 and the rotating strut shaft 36 rotate. It is movably supported by the drawing head 30. And the pivot column shaft 36
A pulley 38 is fixed to the upper end of the
The belt 40 is connected to a pulley (hidden and invisible) fixed to the rotation shaft of the rotation motor 42. Rotating prop shaft 36
A rotary take-out shaft 44 is extended at the upper end of the rotary take-out shaft 44, and a rotary encoder 46 used for controlling the rotation amount of the turret 34 is provided at the upper end of the rotary take-out shaft 44. Further, an annular engaging plate 48 is formed on the rotating strut shaft 36 as an engaging member corresponding to the bearings 22 and 23 at the intermediate portion of the shaft, and the number of linear rotary bearings 32 is provided on the outer peripheral surface of the shaft. Corresponding to the number of vertical grooves, that is, 8 vertical grooves 50
Are equally distributed in the circumferential direction. Its annular engagement plate
Bearings 22 and 23 of the drawing shaft body 10 are engaged with 48 to support the drawing shaft body 10 in the standby position and maintain the direction of the drawing shaft body 10 in a constant direction. Further, the engaging rod 29 of the drawing shaft body 10 is fitted in the vertical groove 50 in a slidable manner along the groove, and regulates the engaging body 24 so as not to rotate with respect to the drawing shaft body 10. .

In addition, the turret 34 has eight notch holes on its outer peripheral edge.
52 are formed so as to be evenly distributed in the circumferential direction. This cutout hole
Reference numeral 52 is for fixing the turret 34 at a desired angular position. The turret fixing mechanism 54 is a drawing head.
As shown in FIG. 4, the motor 56 is disposed in the vicinity of the drawing position of 30 and can rotate forward and backward, the disk 58 fixed to the rotation shaft of the motor 56, and the eccentric position of the disk 58. A transmission rod 60 whose one end is pivotally attached to the transmission rod 60, and a fitting convex portion 64 which engages with the tip of the transmission rod 60 at a portion near the tip and which is removably fitted into the cutout hole 52 of the turret 34 on the lower surface of the tip. A stopper rod 62 pivotally attached to a mounting plate 68 at a mounting portion 66 formed in the middle portion and one end of the stopper rod 62 are engaged with the rear end portion of the stopper rod 62, and the other end thereof is engaged with the mounting plate 68. Coil spring 70
It consists of

In this turret fixing mechanism 54, by driving the motor 56, the tip end portion of the stopper bar 62 is pulled up and fitted through the disc 58 and the transmission rod 60 against the elastic force of the coil spring 70. Notch hole 52 of turret 34
Removed from. Then, in that state, when the turret 34 is rotated by a required angle and the required drawing shaft body 10 is stopped at a drawing position described later, the motor 56 is rotated in the reverse direction to stop the stopper rod 62.
The tip of the is lowered to fit the fitting convex portion 64 into the notch hole 52.
Thereafter, the elastic force of the coil spring 70 prevents the fitting convex portion 64 from coming out of the notch hole 52, and the turret 34 is fixed. Incidentally, FIG. 4 is a view showing a state in which the drawing head is seen in the direction of arrow A in FIG. 72 in FIG.
Is a through hole formed in the turret 34 and through which the drawing shaft 10 is inserted.

Next, the vertical movement / pressurizing mechanism of the drawing shaft 10 moved to the drawing position of the drawing head 30 will be described. This mechanism is an elevating block which integrally has a pair of upper and lower bearings 74 and 75 and a nut portion 76 that holds the engaging plate-like portion 28 of the engaging body 24 when the drawing shaft body 10 is transferred to the drawing position.
Equipped with 78. The engaging plate-like portion 28 of the engaging body 24 is a drawing shaft body.
A pair of upper and lower bearings automatically associated with 10 revolutions 7
It is designed to be inserted between 4 and 75. Lift block 7
A ball screw 80, which is rotatably supported by the drawing head 30, is screwed into the nut portion 76 of 8, and a part of the lifting block 78 is slidably engaged with the guide rail 82. The guide rail 82 guides the user to move up and down. A pulley 84 is fixed to the upper end of the ball screw 80. This pulley 84 is a pulley fixed to a rotation shaft of a lifting / pressurizing motor 88 capable of forward / reverse rotation via a belt 86.
It is linked to 90.

In the vertical movement / pressurizing mechanism configured as described above,
By rotating the pressurizing motor 88 in the normal direction and the reverse direction, the ball screw 80 is rotated via the pulley 90, the belt 86, and the pulley 84, and the nut portion 76 screwed to the ball screw 80 is rotated.
When the elevating block 78 is moved up and down by being guided by the guide rail 82 via the, the drawing shaft body 10 as a whole moves up and down via the engaging body 24 held by the pair of bearings 74, 75. Further, after the drawing blade 14 at the lower end of the drawing shaft body 10 comes into contact with the surface of the work material, the elevating block 78 is further lowered, so that the bearings 74 and 75, the engaging body 24, the coil spring 26, and the large diameter shaft. A required downward force is applied to the drawing blade 14 via the portion 12.

Finally, a mechanism for rotating the drawing shaft that has been moved to the drawing position of the drawing head 30 and stopped will be described.

In this rotation control mechanism, a rotation motor 94 is mounted on a mounting base 92 so as to be rotatable in the forward and reverse directions, and a pulley 96 is axially mounted.
The belt 100 is stretched around the pulley 96 and the pulley 98 fixed to the rotation shaft of the rotation motor 94, and the grip portion 20 of the drawing shaft body 10 at the drawing position is sandwiched between the lower end portion of the rotation shaft of the pulley 96. A gripping member 104 having a pair of left and right bearings 102, 103 to be gripped is fixed, and the gripping member 104, and thus the drawing shaft body 10 gripped by the gripping member 104, is attached to the upper end portion of the rotating shaft of the pulley 96.
A rotary encoder 106 for controlling the rotation amount of is provided. Further, a part of the mounting base 92 is slidably engaged with a guide rail 82 common to the elevating block 78, and can be vertically moved by being guided by the guide rail. Although not shown in the figure, the mounting base 92 has a nut portion integrally fixed to the mounting base 92 and is screwed to the nut portion, as in the lifting mechanism of the lifting block 78 described above. A ball screw movably supported by the drawing head, a pulley fixed to the ball screw, a forward / reverse rotatable lift motor, a pulley fixed to the rotary shaft of the lift motor, and the pulleys. The entire structure is supported by being connected to an elevating mechanism composed of the belt. Reference numeral 108 in FIG. 2 is a lifting motor of the lifting mechanism.

In the rotation control mechanism and the elevating mechanism having the above-mentioned configuration, the mounting base 92 is at the highest position and the bearing 102 of the gripping member 104,
When 103 and the gripping portion 20 of the drawing shaft body 10 at the drawing position are vertically separated from each other, when the lifting motor 108 is rotated and the mounting frame 92 is lowered by the lifting mechanism, the gripping member 104 is also lowered. , The bearings 102, 103 are engaged with the grip 20 from the upper end thereof, and the grip 20 forms a pair of left and right bearings 10.
It is automatically inserted between 2 and 103. Then, the grip 20 is
Since the cross section is in the shape of a square prism having a square shape, the rotation motor 94 is rotated by being held by the bearings 102 and 103 from the left and right, and the pulley 98, the belt 100, and the pulley 96.
When the gripping member 104 is rotated via the drawing shaft 10, the drawing shaft body 10 is supported by the linear rotary bearing 32 and rotates.

Next, the operation of the drawing head configured as described above will be described.

In the state before the work is started, in the plurality of drawing shafts 10, the large-diameter shaft portions 12 are supported by the respective linear rotary bearings 32, and the bearings 22 and 23 of the gripping body 18 are in the annular shape of the rotating support shaft 36. The engaging rod 48 of the engaging body 24 is engaged with the engaging plate 48, and the engaging rods 29 of the engaging bodies 24 are fitted into the vertical grooves 50 of the peripheral surface of the pivot column 36 and are held by the common turret 34. And
When starting the cutting operation, first, the drawing shaft body 10 to be used is selected, and the rotation motor 42 is drive-controlled to fix the pulley, the belt 40, the pulley 38, and the rotation support shaft 36 fixed to the rotation shaft. The turret 34 is rotated via the turret 34, and the selected drawing shaft 10 is rotationally transferred so as to come to the drawing position. At this time,
The turret fixing mechanism 54 is driven so that the fitting protrusion 64 at the tip of the stopper bar 62 is disengaged from the notch hole 52 of the turret 34. Then, the drawing blade 44 of the drawing shaft body 10 which has been transferred to the drawing position and stopped is always directed in a fixed direction, and the engaging body 24 is always the engaging plate-like portion 28 facing outward, and the engaging plate The pair of bearings 74, 75 of the lifting block 78 sandwich the shape portion 28.

When the selected drawing shaft 10 stops at the drawing position, first, the fitting convex portion 64 of the stopper bar 62 is moved by the turret fixing mechanism 54.
The turret 34 into the notch 52 of the turret 34,
Fix 34. Next, the rotation motor 108 is rotationally controlled to lower the mounting base 92, and the bearing 102 of the grip member 104,
The grip portion 20 of the drawing shaft body 10 is gripped by 103. Subsequently, the elevation / pressurizing motor 88 is rotationally controlled to slightly raise the elevation block 78, and the entire drawing shaft body 10 is slightly lifted through the engaging body 24 held by the bearings 74 and 75 to rotate. Bearing 2 of gripping body 18 from annular engagement plate 48 of support shaft 36
Separate 2 and 23. Further subsequently, the rotation motor 94 is rotationally controlled so that the bearings 102 and 103 of the gripping member 104 cause the gripping portion 2 to move.
After rotating the drawing shaft body 10 in which 0 is gripped by 180 °, the elevating / pressurizing motor 88 is controlled to rotate in the opposite direction to lower the elevating block 78 to draw the drawing blade at the lower end of the drawing shaft body 10. 14
The blade edge of is brought into contact with the surface of the workpiece placed on the surface plate table. With the above series of operations, the preparation for the cutting operation is completed. After that, with the drawing shaft 10 being supported by the linear rotary bearing 32 so as to be rotatable and slidable in the axial direction thereof, the X and Y of the drawing head are used.
The drawing motor by controlling the rotation of the rotation motor 94 in accordance with the movement in the direction.
While aligning the direction of the blade edge of 14 with the moving direction of the drawing head, and controlling the lifting / pressurizing motor 88 to control the downward force of the drawing blade 14 on the work material, while processing peel-off film, etc. Cutting work is performed on the material.

When the drawing shaft body 10 is replaced, the rotation motor 94
Is controlled to rotate the drawing shaft body 10, and the drawing shaft body 10 is once returned to the state at the time of starting the cutting operation. Next, the lifting / pressurizing motor
By controlling the rotation of 88, the bearings 22 and 23 of the gripping body 18 are positioned higher than the annular engaging plate 48 of the pivot column shaft 36 until the drawing shaft body is drawn.
After moving 10 up and down, the rotation motor 94 is rotated again to rotate the drawing shaft 10 by 180 °. Next, the bearings 22 and 23 of the gripping body 18 are engaged with the annular engaging plate 48 of the rotating support shaft 36 by controlling the rotation of the lifting / pressurizing motor 88 again and moving the drawing shaft 10 slightly downward. To combine. Finally, the lifting motor 108 is rotationally controlled to raise the mounting base 92, and the bearings 102 and 103 of the gripping member 104 are moved to the drawing shaft 10.
The gripping portion 20 is separated from both of them. After that, the series of operations described above is repeated.

Although the present invention is configured as described above, the scope of the present invention is not limited by the above description and the contents of the drawings, and various modifications can be included without departing from the scope of the invention. For example, the number of bearings arranged on the turret is, of course, not limited to eight, but it is not necessary to support the drawing shaft body having the drawing blades on all the bearings. In addition to the drawing shaft provided, a shaft provided with a roller, a marker pen, etc. may be supported by a part of the bearings and held by a common turret. The rotation control means of the turret, the rotation control mechanism of the drawing shaft body, the engagement / disengagement means of the rotation control mechanism and the drawing shaft body, and the like may have various configurations other than the above embodiment. Further, the engaging means with the drawing shaft body, the gripping means, etc. are not limited to those in the above embodiment.

〔The invention's effect〕

Since this invention is constructed and operates as described above,
When the drawing head of the present invention is mounted on an automatic drawing machine, many kinds of work can be performed by one automatic drawing machine, and moreover, the drawing axis is automatically exchanged for the drawing head. Moreover, the exchanged drawing axis can be immediately subjected to the rotation control for the cutting work, and the operator is relieved from the troublesome work of changing the drawing axis.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
The drawing is a partial perspective view showing the main part of the drawing head of the automatic drawing machine, FIG. 2 is an overall perspective view of the drawing head, FIG. 3 is a perspective view showing the drawing shaft, and FIG. 4 is a part of the drawing head. It is a partial perspective view showing the state which looked up from diagonally downward. 5 and 6 show examples of drawing blades attached to the drawing shaft, respectively, and FIGS. 5 (A) and 6 (A) are front views, FIG. 5 (B) and FIG. 6 (B). ) Is a side view. 10 …… Drawing shaft body, 14 …… Drawing blade, 18 …… Gripping body, 20 …… Gripping portion, 22,23 …… Bearing (engaging portion), 24 …… Engaging body, 26 …… Coil spring, 30 …… Drawing head, 32 …… Linear rotary bearing (bearing part), 34 …… Turret, 36 …… Rotating support shaft, 42 …… Rotary motor, 48 …… Ring engagement plate (engagement member), 52 …… Notch hole, 54 ... Turret fixing mechanism, 74, 75 ... Bearing (engaging means), 88 ... Lifting / pressurizing motor, 92 ... Mounting base, 94 ... Rotating motor, 102, 103 ... Bearings (grasping means), 104 ... Gripping member, 108 ... Lifting motor.

Claims (2)

[Claims] Claim: What is claimed is: 1. A drawing shaft having a drawing blade held at a lower end thereof, a gripping part formed at an upper end thereof, and an engaging part protrudingly provided at a side thereof, and the drawing shaft rotatably. A plurality of bearings, which slidably support the axial direction, are evenly arranged in the circumferential direction, and the bearings are rotatably supported so as to revolve around the center of the circle where the bearings are arranged as a rotation center. A turret, a rotation control unit that controls the rotation of the turret, an engagement member that engages and disengages with the engagement portion by rotating the drawing shaft by a predetermined angle, and a plurality of bearing portions of the turret. Of these, there is provided a gripping means for gripping the gripping portion of the drawing shaft body supported by the bearing portion at the drawing position, and a rotation control mechanism for controlling the rotation of the drawing shaft body gripped by the gripping means. And a drawing supported by a bearing portion at the drawing position of the rotation control mechanism and the turret. Made and a and engaging and disengaging drive means relatively moved to engage and disengage the said grip portion and said gripping means of the body, of the automatic drawing machine drawing heads. 2. An elastic member which is fitted on the drawing shaft body so as to be slidably contactable with the shaft peripheral surface, and which is arranged so as to exert a biasing force on the engaging body and the drawing shaft body in the axial direction. And engaging means for engaging with the engaging body of the drawing shaft body supported by the bearing part that has been transferred to the drawing position among the plurality of bearing parts of the turret. The drawing head of an automatic drawing machine according to claim 1, further comprising a pressing mechanism that vertically moves an engaging body engaged with the drawing means to press the drawing shaft downward through the elastic means.