JP4482736B2 - Gap adjustment device for gravure engraving machine - Google Patents

Description

  The present invention relates to a gap adjusting device which is mounted on a gravure head of a gravure engraving machine and used to adjust a gap between the engraving head and a gravure cylinder.

  The gravure engraving machine has an engraving head that moves forward and backward with respect to the gravure cylinder as described in, for example, Patent Document 1, and a stylus that is a diamond cutting tool is attached to the engraving head to form a cylindrical shape. While rotating the gravure cylinder, the stylus is vibrated at a high speed to form cells (concave points) on the outer peripheral surface of the gravure cylinder.

The engraving head is usually provided with a gap adjusting device for keeping the gap between the stylus and the gravure cylinder constant. A conventional gap adjusting apparatus 1 shown in FIG. 5 is attached to a shaft bar-like sliding shoe 2 having a contact portion 2 a that contacts the gravure cylinder 5 at the tip, and the engraving head 4 to move the sliding shoe 2 forward and backward. The sliding male guide 2 is formed on the outer periphery of the sliding shoe 2 and is engaged with the female screw 3 a formed in the inner hole of the shoe guide 3. The shoe 2 can move forward and backward by rotation.
Then, the sliding shoe 2 is directly rotated by the handle 2c so that the abutting portion 2a at the tip is brought into contact with the outer peripheral surface of the gravure cylinder 5, and further rotated to move the engraving head 4 with respect to the gravure cylinder 5. By displacing, the gap between the stylus and the gravure cylinder 5 is adjusted to a required size.
JP 7-89036 A

  However, in the conventional gap adjusting device described above, the sliding shoe rotates in accordance with the forward / backward operation, and the abutting portion of the tip is pressed against the gravure cylinder while rotating. There was a problem that the surface was easily scratched.

  Accordingly, an object of the present invention is to provide a gap adjusting device capable of adjusting the gap between the engraving head and the gravure cylinder without damaging the gravure cylinder.

The gap adjusting device of the present invention for achieving the above object, the axis and sliding shoe shaft rod shape having abutment portion abutting the gravure cylinder to the tip, the sliding shoe provided at the base end portion side of the sliding shoe An adjusting jig comprising an operating mechanism that moves forward and backward in the axial direction in a state in which rotation is restricted, and a function for guiding the forward and backward movement of the sliding shoe and an attachment member for attaching the adjusting jig to the engraving head possess the features and combines shoe guides, the said operating mechanism comprises a sleeve having a distal end a connection for connecting to said shoe guide is coupled to be rotatable to the sleeve, the rotational operation And a thimble that moves forward and backward in the axial direction by the axial direction. Are fixed to each other but have a non-fixed relationship in the rotational direction, and the sleeve is fixed to the sliding shoe in the rotational direction but not in the axial direction. The shoe guide has a cylindrical shape, and has a center hole in which the sliding shoe is fitted in a sliding state in the axial direction. The connecting portion of the sleeve is detachably connected, and a positioning flange is formed to be engaged with the engraving head when attached to the engraving head .

Preferably, in the present invention, a fitting portion for fitting the connecting portion of the sleeve is provided at a base end portion of the shoe guide, and a slit for dividing the fitting portion into two is formed in the fitting portion. In addition, a fixing screw that crosses the slit is attached, and the connecting part is connected to the fitting part by tightening the fixing screw to reduce the diameter of the fitting part.

  A screw rod having a male screw on the outer periphery is provided concentrically inside the thimble, and a female screw that is screwed into the male screw is provided on the inner periphery of the sleeve. It is desirable that these sleeves and the thimbles are coupled so as to be relatively displaceable in a state where a part thereof is fitted inside the thimble.

  According to the present invention, even if the operation mechanism of the adjustment jig is rotated, the sliding shoe moves forward and backward in a non-rotating state, so that the gap between the engraving head and the gravure cylinder is not damaged. Can be adjusted.

  FIG. 1 schematically shows a state in which a gap adjusting device 10 according to the present invention is attached to an engraving head 4 of a gravure engraving machine. The gap adjusting device 10 is provided with a sliding shoe 13 that can move forward and backward. A jig 11 and a shoe guide 12 that guides the forward and backward movement of the sliding shoe 13 are detachably attached to the engraving head 4 via the shoe guide 12.

  As can be seen from FIG. 2, the adjustment jig 11 is provided on the sliding shoe 13 and the base end side of the sliding shoe 13, and the sliding shoe 13 is restricted from rotating around the axis L. And an operation mechanism unit 14 for moving forward and backward in the direction of the axis L.

  The sliding shoe 13 is made of an elongated shaft rod-like member having a circular cross section, and has a contact portion 13a that contacts the outer surface of the gravure cylinder 5 at the tip. The contact portion 13a is formed so as to be gradually tapered, and a diamond tip is attached to the tip thereof.

  The operation mechanism section 14 is coupled to the shoe guide 12 so as to be detachably and fixedly connected thereto, and the sleeve 16 is rotatably coupled to the sleeve 16. The thimble 17 is fixed to each other in the axial direction with respect to the sliding shoe 13 but is not fixed in the rotational direction. In addition, the sleeve 16 is configured to be fixed to the sliding shoe 13 in the rotational direction but to have an unfixed relationship in the axial direction.

  The configuration of the operation mechanism unit 14 will be described in more detail. As is apparent from FIG. 4, the thimble 17 is composed of a cylindrical member having an open end and a base end 17b closed by an end wall 17c. The screw rod 19 having a male screw 19a on the outer periphery is disposed concentrically with the thimble 17 by fixing the base end portion 19b to the end wall 17c. 17 extends to the vicinity of the tip 17a. At the distal end of the screw rod 19, the base end portion 13b of the sliding shoe 13 is relatively rotatable around the axis L with respect to the screw rod 19, but is fixed to each other in the direction of the axis L. So that they are connected.

  The tip portion 17a of the thimble 17 is formed in a conical surface whose outer periphery is gradually tapered, and a circumferential scale in which a plurality of graduation lines are carved at regular intervals in the circumferential surface portion. 20 is attached, and a number for reading the scale is attached at a position adjacent to the conical surface. Further, on the outer periphery of the thimble 17, there are two knob portions 17d for rotating operation, an intermediate portion and a base end portion, and the surface of these knob portions 17d is knurled to prevent slipping. It has been subjected. However, as shown by a chain line in FIG. 1, a large-diameter handle member 21 for rotating operation can be separately attached.

The sleeve 16 includes a sleeve body 16 a for coupling to the thimble 17 and a connecting portion 16 b for connecting to the shoe guide 12. Of these, the sleeve body 16 a has an outer diameter dimension that can be fitted into the thimble 17, and a female screw 16 c is formed on the inner periphery of the base end thereof. The female screw 16 c is connected to the screw inside the thimble 17. By being screwed to the rod 19, the thimble 17 is joined in a partially fitted state. Then, by rotating the thimble 17 in the forward and reverse directions around the axis L, the thimble 17 moves forward and backward relative to the sleeve 16 in the direction of the axis L. At this time, the sliding shoe 13 extends through the sleeve 16 to the front of the sleeve 16 and moves forward and backward in the direction of the axis L together with the thimble 17.
The sleeve body 16a and the connecting portion 16b may be integrally formed of the same material, but they may be formed as separate parts and integrally connected.

  In order to restrict the rotation of the sliding shoe 13 when it moves forward and backward, a locking groove 22 extending in the axial direction of the sliding shoe 13 is formed on the outer surface of the base end of the sliding shoe 13. An engaging screw 24 is attached to the flange 16 of the connecting portion 16 b of the sleeve 16, and the locking screw 24 is tightened and the tip is locked in the locking groove 22. The rotation of the shoe 13 is restricted. Thereby, the sliding shoe 13 is relatively displaceable in the direction of the axis L in a state in which the rotation is restricted with respect to the sleeve 16.

  The sleeve 16 is provided with a linear scale 25 in which a plurality of scale lines are cut at regular intervals in the axial direction on the outer surface of the sleeve body 16a. The linear scale 25 is composed of a first scale 25a and a second scale 25b formed on both sides of a reference line 26 extending in the direction of the axis L. In the illustrated example, each scale 25a and 25b has a scale line of 1 mm. In addition to being engraved at intervals, the positions of the scale lines are shifted from each other by ½ pitch between the first scale 25a and the second scale 25b. Accordingly, considering the entire linear scale 25, it is substantially the same as the scale lines being attached at intervals of 0.5 mm.

  On the other hand, the circumferential scale 20 attached to the tip of the thimble 17 is obtained by dividing the circumference of the tip of the thimble into 50 equal parts. When the thimble 17 is rotated once, the thimble 17 becomes the straight scale 25. The circumferential scale 20 and the linear scale 25 are related to each other so as to be displaced by 0.5 mm along the line. The displacement of the sliding shoe 13, that is, the gap adjustment amount is displayed by the mutual relationship between the two scales 20 and 25. This is the same principle as a micrometer for precision measurement.

  Further, as shown in FIG. 3, the shoe guide 12 is a hollow member having an elongated cylindrical shape, and is attached to the engraving head 4 by being inserted into the mounting hole 4 a of the engraving head 4. A flange 28 is formed at the base end portion for positioning at the time of mounting. In the figure, reference numeral 32 denotes an O-ring attached to the outer periphery of the shoe guide 12 for sealing between the inner periphery of the mounting hole 4a and the outer periphery of the shoe guide 12.

  At the base end portion of the shoe guide 12, a fitting portion 29 is formed to which the connecting portion 16 b of the sleeve 16 in the adjusting jig 11 is fitted, and the fitting portion 29 is located at the position of the fitting portion 29. A diametrical slit 30 that divides the portion 29 into two in a semicircle shape is provided, and a pair of fixing screws 31 are attached at the position of the flange 28 so as to cross the slit 30. By fitting the connecting portion 16b of the sleeve 16 and tightening the fixing screw 31, the diameter of the fitting portion 29 is reduced so that the adjusting jig 11 is clamped and fixed to the shoe guide 12. It has become. Therefore, the adjustment jig 11 can be removed from the shoe guide 12 by removing the fixing screw 31.

  When the adjusting jig 11 is attached to the shoe guide 12, the sliding shoe 13 passes through the shoe guide 12 and the tip contact portion 13a protrudes forward from the shoe guide 12. The portion is slidably fitted in the central hole 12a of the shoe guide 12, and the forward / backward movement is guided by the shoe guide 12. Therefore, the shoe guide 12 has a function of guiding the sliding movement of the sliding shoe 13 and a function as an attachment member for attaching the adjusting jig 11 to the engraving head 4.

  The gap adjusting device 10 having the above-described configuration moves the sliding shoe 13 forward and backward to bring the tip contact portion 13a into contact with the outer peripheral surface of the gravure cylinder 5, and further moves the sliding shoe 13 forward and backward in this state to engraving. By displacing the head 4 with respect to the gravure cylinder 5, the gap between the engraving head 4, that is, the stylus and the gravure cylinder 5 is adjusted to a required size.

  The sliding shoe 13 is moved forward and backward by rotating the thimble 17 of the operation mechanism portion 14 in the adjustment jig 11 in the forward and reverse directions. That is, when the thimble 17 is rotated, the screw rod 19 also rotates as a unit. However, the sleeve 16 that engages with the screw rod 19 is fixed to the shoe guide 12 and does not rotate. And the thimble 17 are displaced in the direction of the axis L while rotating relative to the sleeve 16.

  At this time, the sliding shoe 13 is also displaced together with the thimble 17, but the sliding shoe 13 is relatively rotatable with respect to the thimble 17, but is in a fixed relationship with each other in the axis L direction. Since the sleeve 16 is engaged with the sleeve 16 so as to be relatively displaceable in the direction of the axis L in a state where the rotation is restricted, the sliding shoe 13 itself does not rotate but moves in the direction of the axis L. Only advance and retreat. As a result, the gap between the engraving head 4 and the gravure cylinder 5 can be adjusted without damaging the outer peripheral surface of the gravure cylinder 5 by the contact portion 13a of the sliding shoe 13.

  In the gap adjusting device 10 of the above embodiment, the adjusting jig 11 is detachably attached to the shoe guide 12 and is attached to the engraving head 4 via the shoe guide 12. The adjusting jig 11 and the shoe guide 12 do not necessarily need to be mutually connectable, and they may be attached to the engraving head 4 separately. That is, a cylindrical shoe guide having an appropriate configuration is mounted in the mounting hole 4a of the engraving head 4, the adjusting jig 11 is detachably attached to the engraving head 4 alone, and the sliding shoe 13 is attached to the shoe. It can also be configured to be guided by a guide.

  The adjusting jig 11 is provided with an appropriately configured locking device having means for braking such as a set screw, a hook, or friction in order to prevent the thimble 17 from rotating due to vibration after adjusting the gap. Further, it may be attached to the operation mechanism unit 14 or other places.

It is a side view which shows roughly the state which attached the gap adjustment apparatus which concerns on this invention to the engraving head of the gravure engraving machine. It is a side view of the jig for adjustment. It is sectional drawing of a shoe guide. It is an expanded sectional view of the operation mechanism part in the said adjustment jig. It is a side view of the conventional gap adjustment apparatus.

Explanation of symbols

4 Engraving Head 5 Gravure Cylinder 10 Gap Adjustment Device 11 Adjustment Jig 12 Shoe Guide 13 Sliding Shoe 13a Abutting Part 14 Operation Mechanism Part 16 Sleeve 16c Female Screw 17 Thimble 19 Screw Rod 20 Circumferential Scale 25 Linear Scale L Axis

Claims (3)

A gap adjusting device for adjusting a gap between the engraving head and the gravure cylinder attached to the engraving head of the gravure engraving machine,
And sliding shoe shaft rod shape having abutment portion abutting the gravure cylinder to the tip, to move forward and backward in the axial direction in a state where the Sliding provided at the base end portion side of the shoe to restrict the rotation around the axis of the sliding shoe adjusting jig and an operating mechanism unit, and have a shoe guide, that combines the function of the mounting member for attachment to the sliding shoe function and engraving head the adjustment jig for guiding the forward and backward movement of
The operation mechanism portion includes a sleeve having a connecting portion for connecting to the shoe guide at a tip, and a thimble that is rotatably coupled to the sleeve and moves forward and backward in the axial direction by the rotation operation. The thimbles are fixed relative to each other in the axial direction with respect to the sliding shoe but have an unfixed relationship in the rotational direction, and the sleeve is mutually fixed in the rotational direction with respect to the sliding shoe. It has a non-fixed relationship in the axial direction,
The shoe guide has a cylindrical shape, and has a center hole in which the sliding shoe is fitted in a sliding state in the axial direction. A connecting portion of the sleeve is attached to and detached from a base end portion of the shoe guide. A flange for positioning is formed that is freely connected and locked to the engraving head when attached to the engraving head.
A gap adjusting device for a gravure engraving machine. A fitting portion for fitting the connecting portion of the sleeve is provided at a base end portion of the shoe guide, and a slit for dividing the fitting portion into two is formed in the fitting portion. 2. The connecting portion is connected to the fitting portion by attaching a fixing screw that crosses the fixing screw and tightening the fixing screw to reduce the diameter of the fitting portion . Gap adjustment device. A screw rod having a male screw on the outer periphery is provided concentrically inside the thimble, and a female screw that is screwed into the male screw is provided on the inner periphery of the sleeve. some gap adjusting device according to claim 1 or 2, characterized in that it is coupled so that with these sleeve and thimble made freely relatively displaceable in a state fitted to the inside of the thimble.

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