JP5972202B2 - Transfer marking device - Google Patents

Description

  The present invention relates to a transfer marking device.

  Conventionally, a mark such as an identification display is displayed on the outer peripheral surface of a cylindrical workpiece.

  Patent Document 1 listed below discloses an identification display displayed along the axial direction on the outer peripheral surface of a cylindrical workpiece. In this patent document 1, the identification display with respect to a cylindrical workpiece is achieved by sticking a label printed with a barcode on the central portion in the width direction of the horizontal position of the outer peripheral surface of the cylindrical workpiece.

Japanese Patent Laid-Open No. 6-183545 (see, for example, FIG. 4)

  The identification display described in Patent Document 1 is obtained by sticking a strip-like label on which a barcode is printed along the axial direction on the outer peripheral surface of a cylindrical workpiece. For this reason, when the peripheral surface of the cylindrical workpiece is viewed from one direction, the visible range of the identification display is limited to less than 180 °.

  In addition, the identification display described in Patent Document 1 is obtained by attaching a label printed with a barcode along the axial direction to the outer peripheral surface of the cylindrical workpiece, and the marking pad on the outer peripheral surface of the cylindrical workpiece. The ink is not transferred by contact.

  For example, the marking pad may be brought into contact with the outer peripheral surface of the cylindrical workpiece to transfer the ink onto the outer peripheral surface of the cylindrical workpiece for marking. In this case, the marking pad is brought into contact with the outer circumferential surface of the cylindrical workpiece, whereby the outer circumferential surface of the cylindrical workpiece can be marked linearly along the dotted or axial direction. However, in the circumferential direction of the cylindrical workpiece, it can be marked only in the form of dots. For this reason, similarly to the above, when the peripheral surface of the cylindrical workpiece is viewed from one direction, the visible range of the marking is limited to less than 180 °.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a transfer marking device capable of expanding the visibility of marking when transferring the marking to a workpiece having a curved surface. .

  In order to solve the above problems, the transfer marking device according to the invention of claim 1 includes a holding unit that holds the workpiece at a position where the curved surface of the workpiece on which the curved surface is formed is marked. An arm provided to move between a position close to the curved surface and a position retracted from the curved surface, and provided rotatably at the tip of the arm, and the arm is close to the curved surface The curved surface is marked by contact with the curved surface when transferred to the position, and the curved surface is pushed by the curved surface as the arm moves, so that the contact surface is in the circumferential direction of the curved surface. A marking pad that rotates along with the marking pad, and biases the marking pad toward the curved surface and rotates the marking pad to a position where it comes into contact with a stopper provided on the arm. It has a member.

  According to the first aspect of the present invention, the workpiece on which the curved surface is formed is held at the position where the curved surface of the workpiece is marked by the holding means. The arm moves between a position close to the curved surface and a position retracted from the curved surface. A marking pad is rotatably provided at the tip of the arm. The marking pad is urged to the curved surface side by the urging means and is rotated to a position where it comes into contact with the stopper provided on the arm. doing. When the arm moves to a position close to the curved surface, the marking pad contacts the curved surface and is marked on the curved surface by ink transfer. Furthermore, the marking pad is pressed against the curved surface as the arm moves, so that the contact surface of the marking pad rotates along the circumferential direction of the curved surface against the force of the biasing member. Therefore, marking is performed by transfer of ink along the circumferential direction of the curved surface by the rotation of the marking pad. Accordingly, the ink can be transferred in the circumferential direction of the workpiece by using the rotation of the marking pad by being pushed by the curved surface of the workpiece without rotating the workpiece in the circumferential direction. For this reason, compared with the case where marking is performed on the curved surface of the workpiece in a dotted manner, the visibility of the marking can be increased when the marking is transferred to the workpiece having the curved surface.

  According to a second aspect of the present invention, in the transfer marking apparatus according to the first aspect, the arm rotates between a position close to the curved surface and a position retracted from the curved surface with a rotation axis as a center. The shaft portion for rotating the marking pad is provided inside the rotation of the tip portion of the arm.

  According to the second aspect of the present invention, the arm is configured to rotate between a position close to the curved surface and a position retracted from the curved surface around the rotation axis. The marking pad rotates around a shaft provided inside the rotation. For this reason, when the marking pad comes into contact with the curved surface, the marking pad is pushed against the curved surface as the arm rotates, so that the contact surface of the marking pad with the workpiece can be smoothly moved along the circumferential direction of the curved surface. It can be rotated.

  According to a third aspect of the present invention, in the transfer marking device according to the first or second aspect, the tip of the arm moves downward to come close to the workpiece and rotate the marking pad. The shaft portion is provided above the curved surface.

  According to the third aspect of the present invention, the tip of the arm moves downward and comes close to the workpiece, and the shaft for rotating the marking pad is provided above the curved surface. For this reason, when the tip of the arm moves downward, the marking pad is pushed by the curved surface, so that the contact surface of the marking pad with the workpiece smoothly rotates along the circumferential direction of the curved surface. Can be made.

  According to a fourth aspect of the present invention, in the transfer marking apparatus according to any one of the first to third aspects, the workpiece is formed of a cylindrical or columnar member.

  According to the fourth aspect of the present invention, marking can be performed on the peripheral surface of a workpiece formed by a cylindrical or columnar member by transferring ink along the circumferential direction.

  According to the transfer marking device of the present invention, the visibility of the marking can be increased when the marking is transferred to a workpiece having a curved surface.

It is a top view which shows the transfer marking apparatus which concerns on one Embodiment of this invention. It is a front view which shows the transfer marking apparatus shown in FIG. It is an enlarged front view which shows the arm and workpiece | work vicinity of the transfer marking apparatus shown in FIG. It is an enlarged front view which shows the state which the marking pad of the front-end | tip part of the arm shown in FIG. 3 rotated. FIG. 5A is an enlarged front view showing the configuration near the marking pad at the tip of the arm, and FIG. 5B is an enlarged side view showing the configuration near the marking pad at the tip of the arm. 6 (A) is a front view showing a single marking pad, FIG. 6 (B) is a side view showing the single marking pad, and FIG. 6 (C) is a front view showing a single end of the arm, FIG. 6D is a side view showing a single end portion of the arm. It is a perspective view which shows the marking of the cylindrical workpiece | work formed with the transfer marking apparatus which concerns on one Embodiment. FIGS. 8A to 8C are side views showing the visible range of marking when the cylindrical workpiece shown in FIG. 7 is rotated in the circumferential direction. FIGS. 9A and 9B are a plan view and a front view showing the operation of the transfer marking device according to the embodiment. FIGS. 10A and 10B are a plan view and a front view showing the operation of the transfer marking device according to the embodiment. FIG. 11A and FIG. 11B are a plan view and a front view showing the operation of the transfer marking device according to one embodiment. 12A and 12B are a plan view and a front view showing the operation of the transfer marking device according to the embodiment. FIGS. 13A and 13B are a plan view and a front view showing the operation of the transfer marking device according to the embodiment. FIGS. 14A and 14B are a plan view and a front view showing the operation of the transfer marking device according to the embodiment. FIGS. 15A and 15B are a plan view and a front view showing the operation of the transfer marking device according to the embodiment. It is an enlarged front view which shows the arm and workpiece | work vicinity of the transfer marking apparatus of a comparative example. It is a perspective view which shows the marking of the cylindrical workpiece | work formed with the transfer marking apparatus of the comparative example. 18 (A) to 18 (C) are side views showing a visible range of marking when the cylindrical workpiece shown in FIG. 17 is rotated in the circumferential direction.

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

  FIG. 1 shows a plan view of a transfer marking device 10 according to an embodiment of the present invention, and FIG. 2 shows a front view of the transfer marking device 10. As shown in these drawings, the transfer marking device 10 has an outer peripheral surface of a workpiece 50 at a marking position where a cylindrical workpiece 50 is set on a base 12 formed in a substantially rectangular shape in plan view. And a work clamp 16 that holds the outer peripheral surface of the work 50 so as to press against the vertical wall 14.

  The work clamp 16 is connected to the main body portion 16A, a plurality of (in this embodiment, two) rods 16B disposed so as to be able to advance and retreat from the main body portion 16A, the tip of the rod 16B, and the outer peripheral surface of the work 50. A vertical plate 16C to be pressed. In this work clamp 16, the rod 16 </ b> B advances and the vertical plate 16 </ b> C presses the outer peripheral surface of the work 50, so that the work 50 is held at a position (marking position) where the outer peripheral surface of the work 50 contacts the vertical wall portion 14. (See FIG. 10). That is, the vertical wall portion 14 and the work clamp 16 constitute a holding means for holding the work 50 at the marking position. At the marking position where the outer peripheral surface of the workpiece 50 is marked, the workpiece 50 is arranged so that its axial direction is substantially parallel to the surface direction of the vertical wall portion 14.

  The transfer marking device 10 includes a rotary cylinder 18 that operates the arm 20. The rotary cylinder 18 is a linear oscillating unit in which a thin cylinder that moves the rotating shaft 22 of the arm 20 in the axial direction and a rotary actuator that rotates (oscillates) the rotating shaft 22 of the arm 20 are integrated.

  The arm 20 is substantially U-shaped when viewed from the front (see FIG. 3), and the arm 20 has a longitudinal direction intersecting the surface direction of the vertical wall portion 14 (the axial direction of the workpiece 50). Has been placed. The arm 20 is configured to rotate (swing) about the rotation shaft 22 by the rotary cylinder 18. As the arm 20 rotates, the distal end portion 20A of the arm 20 swings (moves) between a position close to the outer peripheral surface of the work 50 and a position retracted from the outer peripheral surface of the work 50. (See FIGS. 12B and 13B).

  A marking pad 24 is rotatably supported at the tip 20A of the arm 20. The marking pad 24 comes into contact with the outer peripheral surface of the cylindrical workpiece 50 as a curved surface, whereby ink is transferred to the outer peripheral surface of the workpiece 50 to form markings (marks for identification display or the like). The marking pad 24 will be described in detail later.

  Further, the transfer marking device 10 includes a support plate 26 having a tip extending obliquely upward on the upper side of the work 50 in a front view and a base portion 26A provided on an upper surface of the tip of the support plate 26. An installed ink roller 28 is provided (see FIG. 2). The ink roller 28 is immersed in ink on the lower surface side in the circumferential direction, and ink is supplied to the contacted object by the rotation of the ink roller 28. In the transfer marking apparatus 10 of the present embodiment, the rotary shaft 18 advances and retreats in the axial direction by the rotary cylinder 18, and the arm 20 moves to a position facing the support plate 26. It is set as the structure rotated to 28 side (refer FIG. 10). When the marking pad 24 comes into contact with the ink roller 28 by the rotation of the arm 20, ink is supplied to the marking pad 24.

  As shown in FIGS. 5A and 5B, the tip 20A of the arm 20 is provided with a marking pad 24 having a substantially triangular shape when viewed from the front (FIGS. 5A and 6B). A)). A pin 32 for rotatably supporting the marking pad 24 is attached to the distal end portion 20A of the arm 20. The pin 32 includes a shaft portion 32A and a head portion 32B. In front view, the pin 32 is provided on the inner side of the arm 20 at the distal end portion 20A of the arm 20 (on the side of the rotating shaft 22 shown in FIG. 3). In the marking pad 24, a support portion 24A extends in the vicinity of a corner portion formed in an acute angle shape, and the shaft portion 32A of the pin 32 penetrates the hole portion 24B formed in the support portion 24A. (See FIGS. 6A and 6B).

  A groove 34 is formed at the tip 20A of the arm 20 so as not to hinder the rotation of the marking pad 24. In the present embodiment, the groove 34 is formed at a position where the marking pad 24 rotates in a direction in which the marking pad 24 moves backward in the arm 20. A hole 36 through which the shaft portion 32A of the pin 32 passes is formed on both sides in the width direction of the groove portion 34 on the rotation inner side (rotation shaft 22 side) of the distal end portion 20A of the arm 20 in front view (FIG. 6). (See (C) and FIG. 6 (D)).

  The shaft 32A of the pin 32 penetrates the hole 36 of the tip 20A of the arm 20 on both sides of the marking pad 24 and the hole 24B of the marking pad 24, and the tip of the shaft 32A is fixed by the nut 33. Thus, the marking pad 24 is supported so as to be rotatable about the shaft portion 32A. The groove 34 is formed in a substantially rectangular shape in a plan view and a side view, and a portion of the distal end portion 20A of the arm 20 opposite to the shaft portion 32A is opened (FIGS. 5B and 6B). D)). As a result, when the marking pad 24 is rotated upward in the arm 20 around the shaft portion 32A, the tip end portion (the end portion opposite to the shaft portion 32A) of the marking pad 24 is moved from the arm 20 to the outside. It is set as the structure exposed (refer FIG. 4).

  In the transfer marking device 10 of the present embodiment, the shaft portion 32A of the pin 32 is provided on the inner side (rotation shaft 22 side) of the arm 20 at the distal end portion 20A of the arm 20, and the marking pad 24 moves the shaft portion 32A. It rotates up and down around the center (see FIGS. 3 and 4). Further, the distal end portion 20A of the arm 20 moves from the upper side to the lower side and approaches the workpiece 50, and the shaft portion 32A is disposed above the contact surface of the marking pad 24 with the workpiece 50 ( 3 and 4). As a result, when the arm 20 rotates from the upper side to the lower side, the contact surface of the marking pad 24 with the workpiece 50 is pushed by the workpiece 50 as the arm 20 rotates, and the shaft portion 32A moves upward. It smoothly rotates to the side (along the circumferential direction of the workpiece 50).

  Further, the tip 20A of the arm 20 serves as a biasing member that biases the marking pad 24 toward the work 50 (in the direction protruding from the tip 20A of the arm 20) on the back side of the marking pad 24 in the groove 34. A coil spring 38 is provided. On the back side (upper side) of the groove portion 34 at the distal end portion 20A of the arm 20, a concave hole portion 40 is formed to which the upper end portion of the coil spring 38 is fitted and fixed (FIG. 6C and FIG. 6 (D)). The total length of the coil spring 38 is set so that tension can be applied to the marking pad 24 even when the marking pad 24 is not touching the workpiece 50. Further, the contact length (compression length) of the coil spring 38 is set such that there is a shrinkage allowance even when the marking pad 24 is pushed in until it is flush with the tip edge of the arm 20.

  A protruding portion 24C that protrudes outward in the width direction is formed on the upper end portion of the marking pad 24 (see FIG. 6B). A stopper 42 that protrudes inward in the width direction and contacts the lower surface of the protruding portion 24C of the marking pad 24 is provided at the lower end edge of the distal end portion 20A of the arm 20. The stopper 42 is provided to position the marking pad 24 when no load is applied to the marking pad 24 from the workpiece 50. The side opposite to the shaft portion 32A of the marking pad 24 is urged in a direction protruding from the distal end portion 20A of the arm 20 by the coil spring 38, and the lower surface of the protruding portion 24C hits the stopper 42 of the arm 20, thereby The portion is held at a position protruding from the distal end portion 20 </ b> A of the arm 20.

  The rotary shaft 22 of the arm 20 can be advanced and retracted in the axial direction by the rotary cylinder 18. As the rotary shaft 22 moves back and forth in the axial direction, the arm 20 is marked on the support plate 26 at a position facing the ink roller 28 (see FIG. 9A) and the outer peripheral surface of the work 50 in plan view. It can be moved to the marking position (see FIG. 12A). When the arm 20 moves to a position facing the ink roller 28 of the support plate 26, the rotary cylinder 18 rotates the arm 20 around the rotation shaft 22, whereby the marking pad 24 at the tip 20A of the arm 20 is moved to the ink roller. 28, the ink is supplied to the marking pad 24. Further, when the arm 20 moves to the marking position, the rotary cylinder 18 rotates the arm 20 around the rotation shaft 22 so that the marking pad 24 at the tip 20A of the arm 20 comes into contact with the workpiece 50, and the ink is transferred to the workpiece. 50 is marked on the outer peripheral surface.

  As shown in FIG. 3, the tip 50 A of the arm 20 rotates around the rotation shaft 22 in a state where the cylindrical workpiece 50 is set at a marking position where the cylindrical workpiece 50 comes into contact with the vertical wall portion 14. Rotate to the side. When the tip 20A of the arm 20 rotates toward the workpiece 50, the surface of the marking pad 24 comes into contact with the outer circumferential surface of the workpiece 50, and ink is transferred from the marking pad 24 to the outer circumferential surface of the workpiece 50. As shown in FIG. 4, when the distal end portion 20A of the arm 20 further rotates in a direction approaching the workpiece 50, the marking pad 24 is pressed against the force of the coil spring 38 against the force of the coil spring 38 around the shaft portion 32A. It rotates in the circumferential direction of the workpiece 50. That is, as the arm 20 rotates, the contact surface of the marking pad 24 is inclined in the tangential direction of the workpiece 50 (the contact surface of the marking pad 24 moves along the circumferential direction of the workpiece 50). Thereby, as shown in FIG. 7, linear markings (marks) 52 are formed on the outer peripheral surface of the workpiece 50 along the circumferential direction.

  Next, the operation of the transfer marking device 10 of this embodiment will be described.

  As shown in FIG. 9, before the transfer marking device 10 is started, the rotary shaft 18 moves back in the axial direction by the rotary cylinder 18, and the arm 20 moves to a position facing the ink roller 28 of the support plate 26. (See FIG. 9A). As shown in FIG. 10, the workpiece 50 is set at a position in contact with the vertical wall portion 14, the rod 16 </ b> B of the workpiece clamp 16 advances in the direction of arrow A (the workpiece 50 side), and the vertical plate 16 </ b> C is the outer periphery of the workpiece 50. Press the surface. As a result, the workpiece 50 is held at the marking position where it contacts the vertical wall portion 14 by the vertical plate 16 </ b> C of the workpiece clamp 16. Further, the rotary cylinder 18 causes the arm 20 to rotate about the rotation shaft 22 in the direction of arrow B (ink roller 28 side), and the marking pad 24 at the tip 20A of the arm 20 comes into contact with the ink roller 28 so that the marking pad 24 Ink is supplied (transferred).

  Next, as shown in FIG. 11, the rotary cylinder 18 causes the arm 20 to rotate about the rotation shaft 22 in the direction of arrow C (the side retracted from the ink roller 28), and the arm 20 returns to its original position. Thereafter, as shown in FIG. 12, the rotary cylinder 18 moves forward in the axial direction (arrow D direction) by the rotary cylinder 18, and the arm 20 moves to the marking position on the workpiece 50 (see FIG. 12A).

  Next, as shown in FIG. 13, the arm 20 is rotated about the rotation shaft 22 in the direction of arrow E (work 50 side) by the rotary cylinder 18, and the marking pad 24 at the tip 20 </ b> A of the arm 20 contacts the work 50. To do. That is, as shown in FIG. 3, when the tip 20 </ b> A of the arm 20 rotates to a position close to the workpiece 50, the surface of the marking pad 24 comes into contact with the outer peripheral surface of the workpiece 50, and ink is transferred from the marking pad 24 to the workpiece 50. It is transferred to the outer peripheral surface of. As shown in FIG. 4, when the tip portion 20A of the arm 20 further rotates in a direction approaching the workpiece 50, the marking pad 24 is pushed by the workpiece 50 and resists the force of the coil spring 38 around the shaft portion 32A. Thus, the arm 20 rotates in the direction of retreating from the protruding position (upper side). At this time, the contact surface of the marking pad 24 with the workpiece 50 is inclined in the tangential direction of the workpiece 50 in accordance with the rotation of the arm 20. That is, the contact surface of the marking pad 24 with the workpiece 50 rotates in the circumferential direction of the workpiece 50. The marking pad 24 comes into contact with the outer peripheral surface of the work 50 to transfer the ink, whereby a linear marking 52 is formed along the circumferential direction (see FIG. 7).

  Here, as shown in FIG. 3, at the initial contact of the marking pad 24 with the workpiece 50, the normal angle (°) of the contact surface of the marking pad 24 with the workpiece 50 with respect to the horizontal line is θ1. is there. On the other hand, as shown in FIG. 4, at the time of the final contact of the marking pad 24 with the workpiece 50 after the marking pad 24 is rotated upward about the shaft portion 32A, the workpiece of the marking pad 24 with respect to the horizontal line. The angle (°) of the normal of the contact surface with 50 is θ2. At this time, the marking 52 is extended in the circumferential direction of the workpiece 50 by the difference between θ2 and θ1.

  That is, when the contact surface of the marking pad 24 with the workpiece 50 moves along the circumferential direction of the workpiece 50, as shown in FIG. 7, the linear marking 52 is formed along the circumferential direction on the outer circumferential surface of the workpiece 50. Is formed. The length of the marking 52 is the length that the marking pad 24 has moved along the outer peripheral surface of the workpiece 50 by the rotation of the shaft portion 32A. Therefore, according to the present embodiment, the ink is transferred in the circumferential direction of the workpiece 50 by using the rotation of the marking pad 24 by being pressed against the outer circumferential surface of the workpiece 50 without rotating the workpiece 50 in the circumferential direction. can do.

  After marking 52 on the workpiece 50, as shown in FIG. 14, the rotary cylinder 18 causes the arm 20 to rotate about the rotation shaft 22 in the direction of arrow F (the side retracted from the workpiece 50), and the arm 20 is restored to the original position. Return to position. Next, as shown in FIG. 15, the rotary shaft 18 moves back in the axial direction (arrow G direction) by the rotary cylinder 18, and the arm 20 moves to a position facing the ink roller 28 of the support plate 26 (FIG. 15 ( A)). At the same time, the rod 16B of the work clamp 16 moves backward in the direction of arrow H (the side away from the work 50). Thereby, a series of processes for forming the marking 52 on the outer peripheral surface of the workpiece 50 is completed.

  Thereafter, after the workpiece 50 is replaced and a new workpiece 50 is set at the marking position, the marking 52 is formed on the outer peripheral surface of the workpiece 50 by the same process.

  In such a transfer marking device 10, as the arm 20 rotates, the marking pad 24 in contact with the workpiece 50 rotates in the circumferential direction of the workpiece 50 against the force of the coil spring 38 around the shaft portion 32 </ b> A. Thereby, as shown in FIG. 7, linear markings 52 are formed on the outer peripheral surface of the work 50 along the circumferential direction. For this reason, as shown in FIG. 8 (B), when the position where the marking 52 of the workpiece 50 is the front is a rotation angle of 0 °, the workpiece 50 is moved as shown in FIGS. 8 (A) and (C). Even if the rotation angle is rotated to the position of 90 ° in the circumferential direction, the linear marking 52 can be visually recognized. That is, by forming the linear marking 52 on the outer peripheral surface of the workpiece 50 along the circumferential direction, the marking 52 can be visually recognized even when the workpiece 50 is rotated more than ± 90 ° in the circumferential direction. For this reason, when the marking 52 is transferred to the outer peripheral surface of the workpiece 50, the visibility of the marking 52 can be increased.

  FIG. 16 is a front view showing a configuration in the vicinity of the arm 102 of the transfer marking device 100 of the comparative example. As shown in this figure, the arm 102 is formed in a substantially U shape when viewed from the front, and the arm 102 is arranged such that its longitudinal direction intersects the axial direction of the workpiece 50. The arm 102 is supported so as to be rotatable about the rotation shaft 22, and the tip 102 </ b> A of the arm 102 swings between a position close to the outer peripheral surface of the work 50 and a position retracted from the outer peripheral surface of the work 50. Move (move). A marking pad 104 is fixed to the tip 102A of the arm 102. The marking pad 104 is formed in a substantially triangular shape when viewed from the front, and the marking pad 104 comes into contact with the outer peripheral surface of the workpiece 50 when the distal end portion 102 </ b> A of the arm 102 rotates to a position close to the outer peripheral surface of the workpiece 50. . That is, in this comparative example, the marking pad 104 is configured not to rotate.

  In the transfer marking device 100, since the marking pad 104 is fixed to the distal end portion 102A of the arm 102, the marking pad 104 comes into contact with the outer peripheral surface of the workpiece 50, and as shown in FIG. Ink is transferred to the workpiece 50 to form dot-like markings (marks) 112. That is, only one point of ink is transferred to the outer peripheral surface of the workpiece 50.

  As shown in FIG. 18 (B), when the position at which the marking 112 of the workpiece 50 is the front is a rotation angle of 0 °, as shown in FIGS. 18 (A) and (C), the workpiece 50 is moved in the circumferential direction. In a state where the rotation angle is rotated to 90 °, only the end edge of the marking 112 is visible. Further, when the workpiece 50 rotates in the circumferential direction with a rotation angle of more than 90 °, the marking 112 cannot be visually recognized. In other words, the visible range of the marking 112 with respect to the rotation of the workpiece 50 in the circumferential direction is limited (limited) to 180 ° or less.

  On the other hand, in the transfer marking device 10 of the present embodiment, the marking pad 24 that contacts the workpiece 50 moves around the workpiece 50 against the force of the coil spring 38 around the shaft portion 32A as the arm 20 rotates. By rotating in the direction, linear markings 52 are formed on the outer peripheral surface of the workpiece 50 along the circumferential direction (see FIG. 7). That is, by forming the linear marking 52 along the circumferential direction of the workpiece 50 as compared to the dotted marking 112 (see FIG. 17) on the outer circumferential surface of the workpiece 50 by the transfer marking device 100 of the comparative example, The visible range is widened by the length of the marking 52 in the circumferential direction. For this reason, when the marking 52 is transferred to the outer peripheral surface of the workpiece 50, the visible range of the marking 52 can be expanded to a range wider than 180 ° (see FIG. 8).

  In addition, the shape of the marking pad 24, the range in which the marking pad 24 is rotated by being pressed by the workpiece 50, and the length of the marking 52 in the circumferential direction of the workpiece 50 are not limited to the above embodiment, but can be changed. Is possible.

  Moreover, in the said embodiment, although the workpiece | work 50 is formed of the cylindrical member, it is not limited to this. For example, the workpiece may be formed of a columnar member or a member having an elliptical shape or a curved surface. That is, the present invention can be applied when marking on the curved surface of a workpiece. Thus, the ink can be transferred in the circumferential direction of the curved surface of the workpiece by using the rotation of the marking pad by being pushed by the curved surface of the workpiece without rotating the workpiece having the curved surface in the circumferential direction. it can.

10 Transfer marking device 14 Vertical wall (holding means)
16 Work clamp (holding means)
18 Rotary Cylinder 20 Arm 20A Tip 22 Rotating Shaft 24 Marking Pad 24C Projection 32A Shaft 34 Groove 38 Coil Spring (Biasing Member)
42 Stopper 50 Workpiece 52 Marking

Claims (4)

Holding means for holding the workpiece at a position where the curved surface of the workpiece on which the curved surface is formed is marked;
An arm provided to move between a position close to the curved surface and a position retracted from the curved surface;
The arm is rotatably provided at the tip, and when the arm moves to a position close to the curved surface, the curved surface is contacted to mark the curved surface by ink transfer. A marking pad that is pushed by the curved surface as it moves and the contact surface rotates along the circumferential direction of the curved surface;
An urging member that urges the marking pad toward the curved surface and rotates the marking pad to a position in contact with a stopper provided on the arm.
A transfer marking apparatus having The arm is configured to rotate between a position close to the curved surface and a position retracted from the curved surface around a rotation axis;
The transfer marking device according to claim 1, wherein the shaft portion for rotating the marking pad is provided inside the rotation of the tip portion of the arm. The tip of the arm moves downward and approaches the workpiece,
The transfer marking device according to claim 1, wherein a shaft portion for rotating the marking pad is provided above the curved surface.   The transfer marking device according to any one of claims 1 to 3, wherein the workpiece is formed of a cylindrical or columnar member.

Images