JP2014114829A - Marking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain high workability by one-hand without loading a worker, and perform marking with accuracy and good yield.SOLUTION: A marker 52 marks a rubber hose W at a preliminarily regulated position in the longitudinal direction of the rubber hose W with respect to a tip position piece 28 that positions the longitudinal direction of the rubber hose W in a rubber hose holding member 12 by contacting with a tip part We of the rubber hose W held by the rubber hose holding member 12. A first detection switch 30 detects that the tip part We of the rubber hose W contacts with the tip position piece 28, so that the marker 52 performs a marking operation.

Description

  The present invention relates to a marking device, and more particularly to a marking device for marking a predetermined position of a member to be marked such as rubber hoses and pipes.

  A marking device (stamping device) that marks the surface of rubber hoses and pipes that can be visually checked by workers for assembly of rubber hoses and pipes, positioning during connection work, as a guide for insertion amount, etc. (For example, Patent Document 1).

JP 2007-185862 A

  The conventional marking device requires operations such as holding a rubber hose or pipe with one hand and setting it in place, pressing the switches that start the marking operation with the other hand It is. For this reason, the workability is poor due to the two-handed work, and it is necessary to set the rubber hoses and pipes accurately at the predetermined position. If this work is not performed correctly, the mark is not placed at the predetermined position. This will result in defective products.

  The problem to be solved by the present invention is to perform marking accurately without placing a burden on an operator with one hand and good workability.

  A marking device according to the present invention is a marking device that marks a predetermined position in a longitudinal direction from one end of a member to be marked (W) of rubber hoses and pipes, and includes a base (10) and the base (10 ) And a marking target holding portion (12) provided with a marking target member holding groove (14) for detachably fitting the marking target member (W), and the marking target holding portion (12). A tip positioning portion (28) for positioning the marking target member (W) in the longitudinal direction in the marking target holding portion (12) by abutting one end portion (We) of the marking target member (W) The marking member (W) is placed at a position deviated by a predetermined amount in the longitudinal direction of the marking member (W) with respect to the tip positioning portion (28). The marking unit (42, 52) and the one end of the member to be marked (W) are detected to be fitted in the marking member holding groove (14) of the arrangement portion of the tip positioning portion (28). It is detected by one detection part (30) and the first detection part (30) that the one end part (We) of the member to be marked (W) is in contact with the tip positioning part (28). And a control unit (54) for causing the marking unit (42, 52) to perform a marking operation.

  According to this configuration, the operator holds the member to be marked (W) with one hand and uses the one end (We) of the member to be marked (W) to be the member to be marked holding groove (14) in the arrangement portion of the tip positioning portion (28). ), The one end portion (We) of the marking member (W) hits the tip positioning portion (28). When the first detection unit (30) detects this, the marking unit (42, 52) starts a marking operation, and a marking operation is performed. Since the marking unit (42, 52) is installed at a position displaced by a predetermined amount in the longitudinal direction of the member to be marked (W) with respect to the tip positioning portion (28), the tip of the member to be marked (W) ( By simply pressing the We) against the tip positioning portion (28), the marking is accurately performed at a predetermined position based on the one end (We) of the member to be marked (W) by one-hand operation.

  The marking device according to the present invention is preferably further movable in a predetermined section in the same direction as the longitudinal direction of the member to be marked (W) held by the member to be marked holding part (12), and positioning the tip. A slider (18) provided on the base (10) so that the position biased to the front side of the portion (28) is a steady position, and the tip positioning portion (28) and the slider (18) The marking unit (42, 52) is attached, and the first detection unit (28) is inoperable when the slider (18) is in a steady position, and the marking member (W) The tip end positioning portion (28) is pushed by the one end portion (We), and the slider (18) is moved from a steady position to be operable.

  According to this configuration, the first detection section (30) operates as long as the tip positioning section (28) is pushed by the one end section (We) of the member to be marked (W) and the slider (18) does not move from the steady position. Therefore, it is surely detected that the tip end portion (We) of the member to be marked (W) is pressed against the tip end positioning piece (28). As a result, it becomes difficult to make work mistakes, marking reliability is improved, and yield is improved.

  In the marking device according to the present invention, preferably, the slider (18) is guided and moved by a guide part (16) inclined up and down with respect to a horizontal plane, and is located at the steady position by gravity in a free state. .

  According to this configuration, since the slider (18) is positioned at a steady position by gravity in a free state, there is no need to provide a biasing member for positioning the slider (18) at the steady position, and the structure becomes simple. .

  In the marking device according to the present invention, preferably, the member to be marked (W) has a curved portion (Wc) or a bent portion (Wb), and the member to be marked holding groove (14) has the mark to be marked. The member to be marked (W) has a shape following the shape of the member (W), and is placed in the member to be marked holding groove (14) at a position different from the position of the first detection unit (30). The control unit (54) further includes a second detection unit (32) for detecting the fitting of the mark, and the control unit (54) is configured such that the one end portion of the member to be marked (W) is formed by the first detection unit (30). In addition to detecting that (We) is in contact with the tip positioning portion (28), the second detection portion (32) is inserted into the marking member holding groove (14) with the member to be marked ( W) Said to marking operation marking unit (42, 52) when issued.

  According to this configuration, the first detection unit (30) detects that the one end (We) of the member to be marked (W) is in contact with the tip positioning unit (28), and then performs the second detection. When the portion (32) detects that the member to be marked (W) is fitted in the member to be marked holding groove (14), the marking unit (42, 52) starts the marking operation, and the marking operation is performed. Therefore, when the member to be marked (W) is like a bent tube, it is at a predetermined position with reference to one end (We) of the member to be marked (W) and with respect to the bending direction and the bending direction of the bent tube. Thus, marking is performed at a predetermined position.

  In the marking device according to the present invention, preferably, the marking unit is provided with a marker (52) movably provided between a marking position for marking the member to be marked (W) and a retracted position separated from the marking position. And a marking driving device (42) for moving the marker (52) between the marking position and the retracted position.

  According to this configuration, when the marker (52) is positioned at the retracted position away from the marking position by the marking driving device (42), the marking member (W) is set and removed from the marking holding portion (12). The work is performed with good workability without being disturbed by the marker (52).

  According to the marking device of the present invention, the operator simply holds the member to be marked with one hand and fits one end of the member to be marked into the member to be marked holding groove (14) in the arrangement portion of the tip positioning portion (28). In addition, marking is performed with high accuracy at a predetermined position with the tip of the member to be marked as a reference.

The side view which shows the standby state of one Embodiment of the marking apparatus by this invention. The side view which shows the marking work state of the embodiment. The top view which abbreviate | omits illustration of a marking unit and shows the standby state of the embodiment. The circuit diagram which shows the drive-control system of the embodiment. The perspective view which shows the to-be-marked member in the embodiment.

  Hereinafter, an embodiment of a marking device according to the present invention will be described with reference to FIGS.

  As shown in FIG. 5, the member to be marked of the marking device according to the present embodiment has a curved portion Wc and a bent portion Wb on one virtual plane, and is a rubber hose called a secondary bent tube. W. The marking device is positioned at a predetermined distance L in the longitudinal direction of the hose from the tip end (one end) We of the rubber hose W, and is 90 degrees around the circumference of the hose with respect to the bending direction and the bending direction of the rubber hose W. It is an apparatus for attaching a mark M to the rotational angular position displacement.

  As shown in FIGS. 1 to 3, the marking device includes a flat base 10 and a rubber hose holding member 12 fixedly disposed on the base 10.

  The rubber hose holding member 12 is formed with a rubber hose holding groove 14 for holding the rubber hose W so as to be detachable. The rubber hose holding groove 14 is a concave groove having an upward opening, and has a planar shape following the curved shape to the bent shape of the rubber hose W. The rubber hose holding groove 14 has a predetermined length in the hose longitudinal direction from the groove end portion 14A corresponding to the tip end We side of the rubber hose W. A straight section A (see FIG. 3) is provided over the section. The rubber hose holding groove 14 is fitted so that almost the entire rubber hose W is detachable from the upper side of the rubber hose holding groove 14.

  A linear guide rail 16 is attached on the base 10. The linear guide rail 16 is parallel to the one side of the rubber hose holding member 12 along the straight section A of the rubber hose holding groove 14 and from the groove end portion 14A side of the rubber hose holding groove 14 toward the straight section A. It is inclined up and down with respect to the horizontal plane so as to have a downward slope.

  A rail engagement member 20 of a slider 18 is engaged with the linear guide rail 16 so as to be slidable in the longitudinal direction of the linear guide rail 16. That is, the slider 18 is guided by the linear guide rail 16 and can move relative to the rubber hose holding member 12 in the same direction as the longitudinal direction of the rubber hose W held by the rubber hose holding member 12 on the front end portion We side.

  One end of the slider 18 is fixed to the upper portion of the rail engaging member 20 so as to be placed on the rail engaging member 20 and the rubber hose holding member 12, and the slider 18 extends across the straight section A of the rubber hose holding groove 14 in the groove width direction. The upper cross member 22 is present.

  A lower stopper 24 and an upper stopper 26 for setting a moving section of the slider 18 are attached to the linear guide rail 16. Thereby, as shown in FIG. 1, the slider 18 is shown in FIG. 2 in a lowered position (front position) where the front surface (front surface) 20A of the rail engaging element 20 comes into contact with the lower stopper 24. As shown, the back surface 20B of the rail engagement element 20 can reciprocate in the same direction as the longitudinal direction of the rubber hose W held by the rubber hose holding member 12 between the raised position (pressed position) where the back surface 20B contacts the upper stopper 26. In a free state, it is located at the lowered position by gravity. This lowered position is a position biased to the near side of the distal end positioning piece 28 to be described later, and may hereinafter be referred to as a steady position.

  A tip positioning piece 28 is fixed to the upper cross member 22. The tip positioning piece 28 is located in the rubber hose holding groove 14, and as shown in FIG. 2, the tip end surface at a position protruding to the front side (opposite side of the groove end portion 14 </ b> A) from the upper cross member 22 is formed. The rubber hose W held by the rubber hose holding member 12 is positioned in the longitudinal direction when the leading end portion We of the rubber hose W fitted in the rubber hose holding groove 14 abuts against the stopper surface 28A.

  In this structure, the front end portion We of the rubber hose W comes into contact with the stopper surface 28A, and the front end positioning piece 28 is pushed by the rubber hose W toward the groove end portion 14A (leftward as viewed in FIGS. 1 to 3). Move from the steady position (down position) to the up position.

  A first detection switch 30 and a second detection switch 32 are attached to the bottom of the rubber hose holding member 12. The first detection switch 30 and the second detection switch 32 are to-be-marked member detectors, both of which are constituted by push button switches, each of which has a rubber hose than the through holes 34 and 36 opened at the bottom of the rubber hose holding groove 14. The front end hemispherical buttons 30A and 32A projecting into the holding groove 14 are provided, and the buttons 30A and 32A are closed (turned on) by being pressed by the rubber hose W fitted in the rubber hose holding groove 14.

  The first detection switch 30 detects that the front end portion We of the rubber hose W is fitted in the rubber hose holding groove 14 in the arrangement portion of the front end positioning piece 28 when the button 30A is pressed by the rubber hose W. In the present embodiment, since the button 30A is in the vicinity of the groove end portion 14A and within the movement section of the tip positioning piece 28 accompanying the movement of the slider 18, the tip portion We side of the rubber hose W is fitted in the rubber hose holding groove 14. A state equivalent to the contact of the distal end portion We with the stopper surface 28A of the distal end positioning piece 28 is detected.

  More specifically, when the slider 18 is in the steady position, the first detection switch 30 is positioned (below the tip positioning piece 28) and prohibited (blocked) from pressing the button 30A. ), The slider 18 is pushed while the tip end We of the rubber hose W is in contact with the stopper surface 28A of the tip positioning piece 28, and the slider 18 moves to the raised position. The button 30A is in an operable state in which the button 30A can be pressed by the rubber hose W fitted in the rubber hose holding groove 14 after being deviated from a position directly below the tip positioning piece 28. That is, the tip positioning piece 28 serves as an inhibit (protector) that prevents the first detection switch 30 from being closed while the slider 18 is in the steady position.

  The button 32A of the second detection switch 32 is in the vicinity of the groove end portion 14B opposite to the groove end portion 14A, and the second detection switch 32 detects that the rubber hose W has been fitted in that portion.

  As shown in FIGS. 1 and 2, the rubber hose holding groove 14 has the same direction as the linear guide rail 16 so that the section on the groove end 14 </ b> A side including the straight section A is parallel to the inclination of the linear guide rail 16. It is inclined up and down with respect to the horizontal plane with a gradient, and the section is in the direction opposite to the gradient of the linear guide rail 16 from the linear section A to the groove end 14B from the middle section on the groove end section 14B side opposite to the groove end section 14A. It inclines up and down with respect to the horizontal plane with a gradient, and has an upward gradient from the intermediate portion toward the groove end portion 14B.

  A stand member 38 is erected on the upper cross member 22. A pneumatic cylinder device 42 is vertically attached to the upper portion of the stand member 38 by a mount member 40. The pneumatic cylinder device 42 is a marking driving device, and is provided with a cylinder tube 44 fixed to the mount member 40 and an axially movable inner cylinder chamber 44A and a lower cylinder chamber 44B. The piston 46 is defined by a partitioning piston and a piston rod 48 extending from the piston 46 toward the lower cylinder chamber 44B.

  The tip of the piston rod 48 protrudes downward from the cylinder tube 44, and a marker 52 such as a felt pen is attached to the protruding end portion in an exchangeable manner with the brush tip 52A on the lower side. The central axis B of the writing tip 52A of the marker 52 is on the same axis as the central axis of the pneumatic cylinder device 42, and the central axis B has the predetermined length L in the longitudinal direction of the straight section A from the stopper surface 28A of the tip positioning piece 28. It is in a position biased to the near side (right side as viewed in FIGS. 1 to 3) by the same distance. The color of the marker 52 is preferably different from the surface color of the rubber hose W so that the operator can easily see the mark M. If the surface color of the rubber hose W is black, the color of the marker 52 is It may be white or yellow.

  When the pneumatic cylinder device 42 is supplied with compressed air to the lower cylinder chamber 44B and the piston 46 moves upward, as shown in FIG. When the piston 46 moves downward to move to the retracted position and is supplied with compressed air to the upper cylinder chamber 44A, the marker 52 is lowered from the retracted position, and a marking operation for attaching the mark M to the upper surface of the rubber hose W is performed. Move to the marking position to be performed.

  Thus, in this embodiment, the pneumatic cylinder device 42 and the marker 52 constitute a marking unit.

  Next, the drive-control system of the marking device will be described with reference to FIG.

  The marking device has an electromagnetic switching valve 54 as a control unit. The electromagnetic switching valve 54 is connected to the air pressure port a connected to the air pressure source 56, the air release port b opened to the atmosphere, the first access port c connected to the lower cylinder chamber 44B, and the upper cylinder chamber 44A. A pneumatic port a that communicates with the first port C and an air release port b that communicates with the second port d when not energized, and the pneumatic port a when energized. Communicates with the second entry / exit port d and the atmosphere release port b communicates with the first entry / exit port c.

  As a result, when the electromagnetic switching valve 54 is not energized, the upper cylinder chamber 44A is open to the atmosphere, compressed air is supplied to the lower cylinder chamber 44B, and the marker 52 is in the retracted position above the marking position. To position. On the other hand, when the electromagnetic switching valve 54 is energized, the lower cylinder chamber 44B is opened to the atmosphere, compressed air is supplied to the upper cylinder chamber 44A, and the marker 52 is lowered from the retracted position to the marking position.

  Energization of the electromagnetic switching valve 54 is performed via a series circuit of the first detection switch 30 and the second detection switch 32. As a result, the electromagnetic switching valve 54 is energized only when both the first detection switch 30 and the second detection switch 32 are closed.

  Next, the usage procedure and operation of the marking device will be described.

  In an initial state where the rubber hose W is not fitted in the rubber hose holding groove 14, both the first detection switch 30 and the second detection switch 32 are opened (off), and the electromagnetic switching valve 54 is energized. Therefore, compressed air is supplied to the lower cylinder chamber 44B, and the marker 52 is located at the upper retracted position.

  In this state, the operator grasps the vicinity of the end opposite to the tip end We of the rubber hose W with one hand and holds the tip end We of the rubber hose W together with the slider 18 to the stopper surface 28A of the tip positioning piece 28 in the lowered position. The tip portion We of the rubber hose W is fitted into the rubber hose holding groove 14 from the upper side of the rubber hose holding groove 14 so as to be pressed against the rubber hose. Since this operation is performed in a state where the marker 52 is retracted to the retracted position, the marker 52 is performed with good workability without being in the way.

  Then, the stopper surface 28A of the tip positioning piece 28 is pushed to the groove end portion 14A side (rightward as viewed in FIGS. 1 to 3) by the tip portion We of the rubber hose W, and the slider 18 is moved from the lowered position to the raised position. . In this movement process, the tip positioning piece 28 is retracted from the position directly above the button 30A, the vicinity of the tip portion We of the rubber hose W is positioned at a position directly above the button 30A, and the button 30A is pressed by the rubber hose W. As a result, the first detection switch 30 is closed. In this way, the first detection switch 30 detects that the tip portion We of the rubber hose W is fitted in the rubber hose holding groove 14 in the portion where the tip positioning piece 28 is disposed.

  Subsequently, the end portion of the rubber hose W is gripped with one hand near the end portion We of the rubber hose W, and the end portion We of the rubber hose W is pressed against the stopper surface 28A of the end positioning piece 28. The portion on the opposite side is gradually fitted into the rubber hose holding groove 14. Since the rubber hose holding groove 14 is inclined upward from the intermediate part toward the groove end part 14B, the work from above is performed with a comfortable posture and good workability as compared with the case where the rubber hose holding groove 14 is horizontal. Is called.

  Thus, when substantially the entire rubber hose W is fitted into the entire area of the rubber hose holding groove 14, the button 32A is pressed by the rubber hose W, and the second detection switch 32 is closed.

  As a result, both the first detection switch 30 and the second detection switch 32 are closed, and the electromagnetic switching valve 54 is energized. By this energization, compressed air is supplied to the upper cylinder chamber 44A, the marker 52 descends from the retracted position to the marking position, the writing tip 52A of the marker 52 contacts the upper surface of the rubber hose W, and a mark M is attached to the upper surface of the rubber hose W. .

  The first detection switch 30 is not closed until the tip end We of the rubber hose W is in contact with the stopper surface 28A of the tip positioning piece 28 and the slider 18 is moved toward the groove end 14A by the tip end We of the rubber hose W. Therefore, the closing of the first detection switch 30 requires that the tip portion We of the rubber hose W is in contact with the stopper surface 28A of the tip positioning piece 28.

  The central axis B of the writing tip 52A of the marker 52 is on the near side of the stopper surface 28A of the tip positioning piece 28 in the longitudinal direction of the straight section A by the same distance as the predetermined length L (right side as viewed in FIGS. 1 to 3). Since the first detection switch 30 is kept in the closed state, the marking position by the brush tip 52A is based on the tip portion We of the rubber hose W. It is assured that the position is further away by a predetermined length L in the longitudinal direction of the hose.

  In other words, the distal end positioning piece 28 is pushed by the distal end portion We of the rubber hose W, and the first detection switch 30 does not operate unless the slider 18 is moved from the steady position, so that the distal end portion We of the rubber hose W becomes the distal end positioning piece 28. The detection of being pushed is performed reliably. As a result, it becomes difficult to make work mistakes, marking reliability is improved, and yield is improved.

  The second detection switch 32 is closed only when the rubber hose W has a flat shape that follows the curved shape to the bent shape of the rubber hose W and the rubber hose W is fitted into the rubber hose holding groove 14 exactly. It is reliably ensured that the mark is placed at a position rotated by 90 degrees around the hose circumference with respect to the bending direction and bending direction of W.

  In this way, in a one-hand operation, the position is a predetermined length L away from the tip end We of the rubber hose W in the hose longitudinal direction, and 90 degrees around the hose circumference with respect to the bending direction and the bending direction of the rubber hose W. The mark M is accurately and reliably attached to the rotationally displaced position, and the marking operation is performed with good workability and high yield without requiring experience.

  When marking is completed, the rubber hose W is lifted while holding the vicinity of the end opposite to the tip end We with one hand, and the vicinity of the end is removed from the rubber hose holding groove 14. Then, the push down of the button 32A by the rubber hose W is released, and the second detection switch 32 is opened. As a result, energization of the electromagnetic switching valve 54 is stopped, compressed air is supplied to the lower cylinder chamber 44B, and the marker 52 moves upward from the marking position to the retracted position.

  Thereafter, the rubber hose W including the tip portion We is completely removed from the rubber hose holding groove 14. Since this removal is performed with the marker 52 retracted to the retracted position, the marker 52 is performed with good workability without being in the way. When the rubber hose W is removed from the rubber hose holding member 12 in this way, the slider 18 returns to the original labor position by gravity and prepares for the next operation.

  Although the present invention has been described above with reference to preferred embodiments thereof, the present invention is not limited to such embodiments and can be deviated from the spirit of the present invention, as will be readily understood by those skilled in the art. It is possible to change appropriately within the range not to be.

  For example, the marking drive device is not limited to the pneumatic cylinder device 42 and may be an electric actuator. In the pneumatic cylinder device 42, the piston 46 is spring-biased in the upward or downward direction, and compressed air for driving the piston 46 against the spring force is supplied only to the cylinder chamber 44A or 44B on one side. The piston 46 may be lowered by its own weight.

  The detection unit is not limited to the push button type first detection switch 30 and the second detection switch 32, and may be a non-contact type such as an optical type.

  Further, the stopper surface 28A of the tip positioning piece 28 does not necessarily have to be in a position protruding to the near side from the upper cross member 22, that is, the tip positioning piece 28 of the button 30A of the second detection switch 30 in the steady position. There is no need to be in the position directly above, as long as the button 30A is disposed in the vicinity of the stopper surface 28A.

  Further, when the rubber hose W is a straight pipe or the like and the marking position may be any position around the hose circumference, the second detection switch 32 may be omitted. In this case, the marking operation is performed by closing the first detection switch 30 simply by holding the rubber hose W with one hand and pressing the tip end We of the rubber hose W against the stopper surface 28A of the tip positioning piece 28. It will be.

  Further, the slider 18 may have a structure positioned at a steady position by a spring or the like without depending on gravity.

  The marking device according to the present invention can also be applied to a bent pipe that is thirdarily curved or bent by setting the three-dimensional geometric shape of the rubber hose holding groove 14.

  In addition, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Base 12 Rubber hose holding member 14 Rubber hose holding groove 14A Groove end 18 Slider 24 Lower stopper 26 Upper stopper 28 Tip positioning piece 30 First detection switch 32 Second detection switch 42 Pneumatic cylinder device 52 Marker 54 Electromagnetic switching valve 56 Air pressure source

Claims (5)

A marking device for marking a predetermined position in the longitudinal direction from one end of a member to be marked such as rubber hoses and pipes,
The base,
A marking target holding portion provided on the base and provided with a marking target member holding groove for detachably fitting the marking target member;
A tip positioning portion for positioning the marking target member in the longitudinal direction in the marking holding portion by abutting one end of the marking target member fitted in the marking holding groove;
A marking unit installed at a position deviated by a predetermined amount in the longitudinal direction of the member to be marked with respect to the tip positioning part, and marking the marking member;
A first detector for detecting that the one end of the member to be marked is fitted in a member to be marked holding groove in an arrangement portion of the tip positioning portion;
A control unit that causes the marking unit to perform a marking operation by detecting that the one end of the member to be marked is in contact with the tip positioning unit by the first detection unit;
Marking device having The base so that a position that is movable in a predetermined section in the same direction as the longitudinal direction of the marking member held by the marking member holding portion and that is biased toward the front side of the tip positioning portion is a steady position. Having a slider provided on the
The tip positioning portion and the marking unit are attached to the slider,
The first detection unit is inoperable when the slider is in a steady position, and is operable when the tip positioning unit is pushed by the one end of the member to be marked and the slider moves from the steady position. The marking device according to claim 1.   The marking device according to claim 2, wherein the slider is movable by being guided by a guide portion that is inclined up and down with respect to a horizontal plane, and is located at the steady position by gravity in a free state. The marking member has a curved portion or a bent portion, and the marking member holding groove has a shape that follows the shape of the marking member,
A second detector for detecting that the member to be marked is fitted into the member to be marked holding groove at a position different from the arrangement position of the first detector;
In addition to detecting that the one end portion of the member to be marked is in contact with the tip positioning portion by the first detecting portion, the control portion detects that the second detecting portion is the member to be marked. The marking device according to any one of claims 1 to 3, wherein the marking unit is subjected to a marking operation when it is detected that the member to be marked is fitted in the holding groove.   The marking unit includes a marker movably provided between a marking position for marking the member to be marked and a retracted position away from the marking position, and the marker between the marking position and the retracted position. The marking device according to any one of claims 1 to 4, further comprising a marking driving device that is moved to the position.

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