WO2011049194A1

WO2011049194A1 - Stamp head and stamp device

Info

Publication number: WO2011049194A1
Application number: PCT/JP2010/068671
Authority: WO
Inventors: 祐一山川
Original assignee: セイコープレシジョン株式会社
Priority date: 2009-10-23
Filing date: 2010-10-22
Publication date: 2011-04-28
Also published as: JP2011088389A

Abstract

Provided are a stamp head (30) and a stamp device, where the stamp head (30) stamps an object to be stamped with a tip portion of a stamp pin (33). The head is provided with a casing (31) wherein a return spring (113) biasing the stamp pin (33) in the +Z direction, and a driving means (40) for applying a pressing force to the stamp pin (33) against the biasing force, are provided; and a support member (32) which is joined to the casing (31) and is attached to a carriage of the stamp device so that the stamp pin (33) is projected toward the object to be stamped. By changing a sheet-like member (30a) located between the casing (31) and the support member (32) to a sheet-like member having a different thickness, a distance (La (mm)) between the center (attachment position to the carriage) of a carriage attachment hole (32e) and the tip of the stamp pin (33) can be adjusted.

Description

Stamping head and stamping device

The present invention relates to a stamping head and a stamping device.

In recent years, in order to improve product management and traceability, the surface of an article to be stamped, such as an industrial product, is directly stamped using a plurality of stamping pins arranged on a stamping head, and a plurality of dots For example, a stamping device that directly draws or stamps a two-dimensional code or a character represented by a QR code (registered trademark), a data matrix, or the like has attracted attention (for example, see Patent Document 1).

As shown in FIG. 8, in such a stamping device 120, a stamping head 130 having a stamping pin is attached to an X moving body 24 called a carriage. Then, by moving the X moving body 24 in the X axis direction and the Y axis direction, dots are formed on the workpiece 100 in various patterns.

That is, in FIG. 8, the X moving body 24 is attached to the Y moving body 23 moving in the Y axis direction by X guides 51 </ b> A and 51 </ b> B arranged to extend in the X axis direction. Are supported so as to be movable in the X-axis direction. The X moving body 24 moves in the X-axis direction when the feed screw 60X is rotated by the X motor 50X. The X moving body 24 moves in the Y-axis direction together with the Y moving body 23 by rotating a feed screw (not shown) by the Y motor 50Y.

In such a stamping device 120, as shown in FIG. 9, the stamping pin 33 is urged upward by a return spring 113 whose lower end contacts a predetermined position in the stamping head. Then, using a driving means such as an electromagnetic solenoid 143 and a plate-like member called an embossing pin driving lever 114 (armature), the energizing force of the return spring 113 is applied to the embossing pin 33 whose tip is formed in a conical shape. Applying a pressing force against As a result, the tip of the marking pin 33 is pressed against the workpiece 100, and dots constituting a two-dimensional code or the like are imprinted on the surface of the workpiece 100, for example.

As shown in FIG. 9, the stamping pin 33 is urged in one direction by the return spring 113, and the stamping pin 33 has a base end portion 33 a (large diameter portion) that contacts the stamping pin drive lever 114. The upward movement is restricted. This position is set as a standby position for the marking pin 33. Further, the stamping pin drive lever 114 abuts the stamping pin drive lever restricting portion 119 disposed on the top of the stamping pin drive lever 114 at its tip, and the upward movement is restricted. This position is set as a standby position for the stamping pin drive lever 114. From this state, a pressing force is applied to the stamping pin 33 by the driving means and the stamping pin drive lever 114. Thereby, the embossing pin 33 protrudes from the embossing head 130, and dots are formed on the surface of the object to be engraved 100. When the standby positions of the stamping pin 33 and the stamping pin drive lever 114 change, the extension amount of the return spring 113 changes and the urging force to the stamping pin 33 also changes. At the same time, the pressing force applied to the stamping pin 33 also changes.

In such a stamping device 120, it is necessary to keep the distance Lc (mm) (see FIG. 9) between the mounting surface of the workpiece 100 and the tip of the stamping pin 33 constant. If the distance Lc is too large, the stamping pin moving stroke is insufficient and the dots on the surface of the workpiece 100 become shallow. On the other hand, when the distance Lc becomes too small, the dots on the surface of the workpiece 100 become deep. And the stamping quality is degraded. When the workpiece 100 is made of a fragile material such as plastic, the impact of the stamping pin 33 becomes too strong, and the workpiece 100 may be damaged.

Thus, in the marking device 120, it is necessary to keep the distance Lc within a specified range. For this purpose, as shown in FIG. 9, it is necessary to adjust the distance La (mm) between the carriage mounting position (center of the carriage mounting hole) and the lower end of the stamping pin 33 for each stamping head 130. However, in the stamping head 130, the distance La (mm) varies depending on the variation in the length of the stamping pin 33 itself, the processing accuracy of the components constituting the stamping head 130, or the assembly accuracy of the stamping head 130. It becomes like this.

Specifically, as shown in FIG. 9, the distance from the end surface on the −Z side of the tip of the stamping pin drive lever 114 at the standby position of the stamping pin 33 to the center of the mounting hole to the carriage is Le ( mm). This distance Le (mm) differs for each embossing head 130 depending on the processing accuracy of the parts constituting the embossing head 130 and the assembly accuracy of the embossing head 130. Further, the distance from the end surface on the −Z side of the tip of the stamping pin drive lever 114 at the standby position of the stamping pin 33 to the tip of the stamping pin 33 is Lf (mm). This distance Lf (mm) is also different for each embossing head 130 due to variations in the length of the embossing pin 33.

The distance La (mm) (= distance Lf−distance Le) is determined by the distance Le and the distance Lf. However, since the distance Le and the distance Lf vary as described above, the distance La also varies. In some cases, the above-described distance Lc may be out of the specified range.

As a countermeasure against such a problem, in the stamping apparatus 120, when the stamping head 130 is replaced with a new one, each time the stamping object 100 is moved in the Z-axis direction to keep the distance Lc within the specified range. It is conceivable to change the position. It is also conceivable to change the position at which the stamping pin drive lever 114 starts to press the stamping pin 33. Furthermore, it is conceivable to correct the variation in the length of the stamping pin 33 by post-processing. For example, after assembling the embossing head 130, it is conceivable to align the tip of the embossing pin 33 at a certain position by polishing or the like.

JP-A-8-276607

However, changing the position at which the stamping pin drive lever 114 begins to press the stamping pin 33 changes the standby positions of the stamping pin 33 and the stamping pin driving lever 114 described above. For this reason, the pressing force applied to the stamping pin 33 changes. As a result, the dot marking state on the object to be stamped 100 becomes non-uniform. This process is described in detail below.

As shown in FIG. 9, a movable yoke 116 is fixed to the lower surface of the stamping pin drive lever 114. When the yoke case 117 is excited by the electromagnetic solenoid 143, the movable yoke 116 is attracted to the yoke case 117. Then, the movable yoke 116 contacts the contact portion 117a of the yoke case 117 in the stamping head 130, so that the downward movement is restricted. The position of the stamping pin drive lever 114 in a state in which this movement is restricted is set as the contact position of the stamping pin drive lever 114.

In the stamping head 130, by changing the position of the stamping pin drive lever restricting portion 119 in the Z-axis direction, the relationship between the contact position of the stamping pin drive lever 114 and the standby position is between the plurality of stamping heads 130. It has been adjusted to be constant. That is, when the distance at which the tip of the stamping pin drive lever 114 moves when the stamping pin drive lever 114 moves from the standby position to the contact position at this time is the static stroke length Ls (mm), this static stroke length Ls is adjusted so as to be constant among the plurality of embossing heads 130.

As the stamp pin drive lever 114 moves, the stamp pin 33 also moves. An inertial force acts on the stamping pin 33 in accordance with the acceleration when the stamping pin drive lever 114 is attracted to the yoke case 117. For this reason, the stamping pin drive lever 114 continues to move slightly even after the further movement is restricted by the contact portion 117a. Thereafter, the movement is restricted by the urging force of the return spring 113. At this time, the amount of movement of the embossing pin 33 from the position slightly moved to the position where the movement is restricted is hereinafter referred to as an “emitting pin moving stroke”.

Consider a case where the abutting portion between the embossing pin drive lever 114 and the base end portion 33a of the embossing pin 33 is located above the state shown in FIG. At this time, the distance between the contact portion 117a and the lower end of the movable yoke 116 is longer than in the state shown in FIG. 9, and the static stroke length Ls is longer. On the other hand, let us consider a case where the abutting portion between the stamping pin drive lever 114 and the base end portion 33a of the stamping pin 33 is positioned below the state shown in FIG. At this time, the distance between the contact portion 117a and the lower end of the movable yoke 116 is shorter than the state shown in FIG. 9, and the static stroke length Ls is shortened.

When the yoke case 117 is excited by the electromagnetic solenoid 143, the force with which the stamping pin drive lever 114 is attracted to the yoke case 117 varies depending on the distance between the contact portion 117a and the lower end of the movable yoke 116. Specifically, when the distance between the contact portion 117a and the lower end of the movable yoke 116 is long, the force with which the embossing pin drive lever 114 is attracted is weak. On the contrary, if it is short, it is strong. Therefore, when the static stroke length Ls is long, the pressing force applied to the stamping pin 33 becomes weak. For this reason, the inertial force acting on the stamping pin 33 is reduced, and the stamping pin moving stroke is reduced. On the other hand, when the static stroke length Ls is short, the pressing force applied to the stamping pin 33 is increased. For this reason, the inertial force acting on the stamping pin 33 is increased, and the stamping pin moving stroke is increased.

Thus, when the static stroke length Ls is long, the stamping pin moving stroke becomes small, and the dots on the surface of the workpiece 100 become shallow. On the contrary, when the static stroke length Ls is short, the stamping pin moving stroke becomes large, and the dots on the surface of the workpiece 100 become deep. Therefore, in this case, it is necessary to change the excitation condition of the electromagnetic solenoid 143 so that the dot depth becomes a predetermined value.

That is, when the standby position of the stamping pin 33 and the stamping pin drive lever 114 is changed, the static stroke length Ls changes, and the excitation condition of the electromagnetic solenoid 143 must be adjusted. For this reason, the adjustment of the embossing head 130 becomes complicated. Therefore, it is desirable not to change this standby position.

Further, the stamping pin 33 has a tip portion formed in a conical shape or the like. Here, in order to keep the distance La (mm) within the specified range while maintaining the conical shape, it is very difficult to trim the tip of the embossing pin 33 by polishing or the like.

Furthermore, in order to change the standby position of the embossing pin drive lever 114, for example, as shown in FIG. 9, a new sheet 119b is added to the sheet 119a disposed in the embossing pin drive lever restricting portion 119. It is possible to do. In this case, it is necessary to disassemble the embossing head 130. However, since the parts constituting the embossing head 130 are not made into blocks, they are separated from each other.

The present invention has been made in view of the above-described problems, and the mounting surface of the workpiece to be stamped and the stamping can be performed without changing the standby position of the stamping pin and without processing the stamping pin. An object of the present invention is to provide a stamping head and a stamping device that can keep the distance from the tip of the stamping pin within an appropriate range.

In order to achieve the above object, a stamping head according to the first aspect of the present invention comprises:
A stamping head for stamping a workpiece at the tip of a stamping pin,
Biasing means for urging the stamping pin in a direction away from the workpiece, and driving means for applying a pressing force to the stamping pin in a direction approaching the workpiece against the biasing force And a first portion in which the embossing pin is disposed,
A second portion that is bonded to the first portion and that holds the stamping pin in a state of being attached to a carriage of the stamping device;
By changing the separation member interposed between the first part and the second part to a different size, the distance between the mounting position on the carriage and the tip of the stamping pin can be adjusted. Yes,
It is characterized by that.

It is preferable that the first part and the second part are formed by integrating a plurality of parts.

It is preferable that the urging means is disposed in the first portion so that one end thereof is in contact with a part of the first portion and the other end is in contact with a portion of the embossing pin.

The embossing pin is a wire-like member having a tip portion formed in a conical shape or a wedge shape, and the urging means is a coil spring inserted through the wire-like member, It is preferable that the first portion is disposed so as to abut on the large diameter portion located at the proximal end of the stamping pin.

The first part and the second part are preferably assembled by bolting with a separating member interposed therebetween.

The marking device according to the second aspect of the present invention is:
A stamping head having a plurality of stamping pins, and supporting the stamping head movably with respect to the stamped object, and projecting the stamping pin from the stamping head to stamp the workpiece. A stamping device comprising:
As the stamping head, the aforementioned stamping head is used.
It is characterized by that.

According to the present invention, the distance between the placement surface of the workpiece and the tip of the stamping pin is within an appropriate range without changing the standby position of the stamping pin and without processing the stamping pin. Can fit inside.

It is a perspective view which shows the marking apparatus which concerns on embodiment of this invention. It is a perspective view which shows schematic structure of the marking head which concerns on embodiment of this invention. FIG. 3 is an arrow view seen from the −Z direction in FIG. 2. It is a bottom view of a sheet-like member. FIG. 3B is a sectional view taken along line AA in FIG. 3A. It is a schematic diagram explaining the structure and operation | movement of the embossing head which concerns on embodiment of this invention. It is a schematic diagram explaining the structure and operation | movement of a stamping head when the thickness of a sheet-like member is changed. It is a schematic diagram explaining the structure and operation | movement of a stamping head when the thickness of a sheet-like member is changed. It is a schematic diagram explaining the structure and operation | movement of a stamping apparatus. It is a schematic diagram explaining the structure and operation | movement of a stamping head.

Hereinafter, a stamping head and a stamping apparatus according to an embodiment of the present invention will be described with reference to the drawings.

The stamping device 20 of the present embodiment shown in FIG. 1 forms a two-dimensional code or characters composed of a plurality of dots on the surface of the workpiece. The stamping device 20 is provided so as to be movable along the X axis with respect to the base member 21, the Y moving body 23 provided to be movable along the Y axis with respect to the base member 21, and the Y moving body 23. An X moving body 24, a stamping head 30 attached to the X moving body 24 via a holder 25, and a driver 26 that performs electrical control of the stamping apparatus 20 are provided. In the present embodiment, the X moving body 24 serves as a carriage that moves the marking head 30 along the X axis.

The base member 21 includes a plate-like first flat plate portion 21a parallel to the XY plane with the longitudinal direction as the X-axis direction, and a cross-section composed of a plate-like second flat plate portion 21b with the longitudinal direction as the X-axis direction and parallel to the XZ plane. It is an L-shaped member. Further, a support plate 22 whose longitudinal direction is the X-axis direction is fixed to the + Y side end portion of the first flat plate portion 21 a formed on the base member 21.

The −Y side surface of the support plate 22 and the + Y side surface of the second flat plate portion 21b formed on the base member 21 are substantially parallel. Further, between the support plate 22 and the second flat plate portion 21b of the base member 21, long columnar Y guides 52A and 52B having a longitudinal direction as the Y-axis direction are respectively installed. One end of each of the Y guides 52A and 52B is fixed to the support plate 22, and the other end is fixed to the second flat plate portion 21b.

The Y moving body 23 includes a plate-like moving portion 23a whose longitudinal direction is the X-axis direction, and a pair of support portions 23b extending in the −Z direction from the + X side end portion and the −X side end portion of the moving portion 23a. It is a member. In addition, a circular opening 23c penetrating in the Y-axis direction is formed at the center of the moving portion 23a of the Y moving body 23. Circular openings 23d are formed on the + X side and the −X side of the circular opening 23c, respectively. Further, between the pair of support portions 23b of the Y moving body 23, long cylindrical X guides 51A and 51B having a longitudinal direction as the X-axis direction are respectively installed. Both ends of the X guides 51A and 51B are fixed to the pair of support portions 23b, respectively.

The Y moving body 23 configured as described above is supported so as to be movable in the Y-axis direction with respect to the base member 21 by a pair of Y guides 52A and 52B inserted into the circular openings 23d of the moving portion 23a. ing.

Further, a feed screw 60Y is screwed into the circular opening 23c formed in the moving portion 23a of the Y moving body 23. The feed screw 60Y is rotatably supported by the second portion 21b of the base member 21 and the support plate 22 at the + Y side end and the −Y side end. The Y moving body 23 moves in the Y-axis direction when the feed screw 60Y is rotated by the Y motor 50Y.

The X moving body 24 is a rectangular parallelepiped member whose longitudinal direction is the Z-axis direction. A circular opening 24 a penetrating in the X-axis direction is formed at the center of the X moving body 24. A pair of circular openings 24b are formed on the + Z side and the -Z side of the circular opening 24a so as to sandwich the circular opening 24a.

The X moving body 24 configured as described above is supported so as to be movable in the X-axis direction with respect to the Y moving body 23 by X guides 51A and 51B inserted into the pair of circular openings 24b.

Further, a feed screw 60X is screwed into the circular opening 24a formed in the X moving body 24. Both ends of the feed screw 60X are rotatably supported by a pair of support portions 23b of the Y moving body 23. The X moving body 24 moves in the X-axis direction when the feed screw 60X is rotated by the X motor 50X.

Hereinafter, the stamping head 30 of the stamping apparatus 20 according to the embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 is a perspective view of the embossing head 30 as viewed from the −X, −Y, and + Z sides. FIG. 3A is a view of the stamping head 30 as viewed from the −Z side. FIG. 3B is a bottom view of the sheet-like member 30a viewed from the −Z side. FIG. 4 is a cross-sectional view of the embossing head 30, and shows a cross section passing through the center of the embossing head 30 and parallel to the XZ plane.

As shown in FIGS. 1 to 4, the stamping head 30 of the present embodiment employs a separate type structure composed of a first part and a second part, each of which is formed by integrating a plurality of parts. is doing. The stamping head 30 includes a casing 31 as a first part, and a support member 32 as a second part that is joined to the casing 31 and supported by the X moving body 24 (carriage) of the stamping device 20. Prepare. The casing 31 as the first part and the support member 32 as the second part have an independent structure and can be handled independently.

As shown in FIGS. 2 to 4, the stamping head 30 further includes a sheet-like member 30 a interposed between the casing 31 and the support member 32 and a U-shaped member that fixes the constituent members of the casing 31. A fixed spring 31c, a plurality of (9) stamping pins 33 having the same length, a return spring (biasing means) 113 that is a coil spring and applies a biasing force to the stamping pin 33, and a stamping A stamping pin drive lever 114 for pressing the pin 33, a cylindrical movable yoke 116, and a solenoid 43 are provided.

The sheet-like member 30a is a sheet-like member having a uniform thickness and has a function as a so-called spacer. The sheet-like member 30a is made of a hard material that hardly changes in thickness even when pressure is applied, such as metal, hard resin, hard rubber, and hard paper material.

As shown in FIG. 4, the embossing pin 33 is formed in a conical shape or a wedge shape so that the tip portion on the −Z side is tapered. At the same time, the base end portion 33a is a wire-like member formed with a larger diameter than the main body which is the other portion.

Further, the stamping pin drive lever 114 is a long member, and comes into contact with the base end portion 33a of the stamping pin 33 at the tip portion located at the center of the stamping head 30. As a result, the punching pins 33 are pressed, and the punching pins 33 are moved from the reference position to the −Z side (downward). The tip end of the movable yoke 116 on the + Z side is integrally fixed to the stamping pin drive lever 114, for example, by caulking. The movable yoke 116 is made of a soft magnetic material such as electromagnetic soft iron or silicon steel.

2 and 4, the casing 31 includes a base member 115 serving as a base material, a yoke case 117 having a core on which the solenoid 43 is disposed, a yoke plate 118 that houses the movable yoke 116, and a driving pin drive. The lever holder 31a that holds the lever 114 and the lever holder top plate 31b that is the top plate of the lever holder 31a are configured.

As shown in FIG. 4, the base member 115 supports the yoke case 117, the yoke plate 118, the lever holder 31a, and the lever holder top plate 31b. And the center part protrudes and forms in a bottomed cylindrical shape from the other disk-shaped part, and forms the recessed part 31h. In addition, a pair of fitting convex portions 115p arranged in the X-axis direction are formed on the disk-shaped portion of the base member 115 so as to protrude downward (−Z direction). The yoke case 117, the yoke plate 118, the lever holder 31a, and the lever holder are fixed to the base member 115 by the fixing spring 31c having both ends fixed by a pair of protrusions formed on the side of the base member 115. The top plate 31b is fixed integrally to form an independent casing 31.

As shown in FIG. 2, FIG. 3A and FIG. 4, the casing 31 includes a plurality of (9) stamping pins 33 and a plurality (9) of biasing each stamping pin 33 in the + Z direction. The return spring 113 is accommodated (arranged). Further, a plurality (nine) of driving means 40 for applying a pressing force to each of the punching pins 33 against the urging force of the return spring 113 are accommodated (arranged). The driving means 40 includes a stamping pin driving lever 114, a movable yoke 116, and a solenoid 43, respectively.

The return springs 113 are inserted through the stamping pins 33, respectively. One end of the return spring 113 is in contact with the bottom surface of the recess 31h of the base member 115 from the + Z side. The other end is in contact with the end surface on the −Z side of the base end portion 33 a of the stamping pin 33. In this state, each return spring 113 applies an urging force to the stamping pin 33 in the + Z direction.

The stamping pin drive lever 114 is held in the lever holder 31a by a holding mechanism (not shown) at the end (rear end) opposite to the contact portion (tip portion) with the base end 33a of the stamping pin 33. ing. Thereby, the stamping pin drive lever 114 can swing in the Z-axis direction. Note that the holding mechanism is configured by, for example, a leaf spring provided between the lever holder top plate 31 b and the end portion of the stamping pin drive lever 114.

The stamping pin 33 is biased in the + Z direction by the return spring 113, and after the proximal end portion 33 a of the stamping pin 33 contacts the stamping pin drive lever 114, the stamping pin 33 is stamped by the biasing force of the return spring 113. It moves upward together with the pin drive lever 114. Here, the stamping pin drive lever 114 abuts the stamping pin drive lever restricting portion 119 (see FIGS. 4 and 9) at the tip thereof, so that the upward movement is restricted. The positions of the stamping pin 33 and the stamping pin driving lever 114 in this restricted state are the standby positions of the stamping pin 33 and the stamping pin driving lever 114.

The yoke case 117 is provided with a cylindrical core 121 corresponding to the position where the movable yoke 116 is disposed. A solenoid 43 is arranged around the core 121. The yoke case 117 attracts the movable yoke 116 when the core 121 is excited by the solenoid 43. Then, the stamping pin drive lever 114 is swung in the −Z direction (downward) from the reference position.

The yoke plate 118 is for forming a closed magnetic path, and is made of a soft magnetic material such as electromagnetic soft iron or silicon steel.

On the other hand, the support member 32 is formed by integrating a joining plate 32a, a mounting plate 32c, and a stamping pin holding portion 32d. The joining plate 32 a is formed at the end in the Z direction in parallel to the XY plane, and is used for joining with the casing 31. The mounting plate 32c is orthogonal to the joining plate 32a and parallel to the XZ plane. The stamping pin holding portion 32d is formed in a central portion of the joining plate 32a so as to extend in the Z direction, and has a rectangular box shape that passes through the central portion of the mounting plate 32c. The upper surface (surface formed in the + Z direction) of the bonding plate 32a is flat.

Three bolts 32b are screwed to the joining plate 32a from the -Z direction. The joining plate 32a is formed with a pair of fitting holes 32h that are arranged in the X-axis direction with the stamp pin holding portion 32d interposed therebetween.

The mounting plate 32c is formed with a pair of carriage mounting holes 32e sandwiched between the stamp pin holding portions 32d and arranged in the X-axis direction.

Further, the stamping pin holding portion 32d accommodates a plurality of stamping pins 33 and stamping

pin guide plates

115a, 115b, 115c, 115d. The relatively long stamping pin 33 is supported by stamping pin guide plates 115a to 115d. The stamping pin guide plates 115a to 115d are flat plate materials through which guide holes for guides are penetrated. The embossing pin 33 is inserted into the guide hole and maintains a constant posture along the Z axis in the embossing pin holding portion 32d.

The support member 32 supports the plurality of embossing pins 33 so as to be movable along the Z-axis in a state where their tip portions protrude from the support member 32. Then, each embossing pin 33 is protruded toward the workpiece 100. Specifically, each marking pin 33 is inserted into the workpiece 100 by passing through a guide hole of the marking pin guide plate 115d disposed at the end (tip) on the −Z side of the marking pin holding portion 32d. Protrusively toward.

As shown in FIGS. 2, 3A, and 3B, a slit-like hole 30c is formed in the central portion of the sheet-like member 30a. A pair of slit-shaped holes 30b that are smaller than the holes 30c and have the same shape as the holes 30c are formed on both sides of the slit-shaped holes 30c in the X-axis direction.

As shown in FIG. 2, the sheet-like member 30a is fitted so that the narrow part of the hole 30c and the large part of the pair of holes 30b are along the Y-axis direction with the three bolts 32b described above. Thereby, the sheet-like member 30a is supported between the casing 31 and the support member 32 so as not to move in a direction parallel to the XY plane. Further, the stamping pin holding portion 32d is fitted into the large portion of the hole 30c. Further, the pair of fitting convex portions 115p of the base member 115 of the casing 31 are inserted through the narrow portions of the pair of holes 30b.

In order to assemble the embossing head 30, first, a sheet-like member 30a is interposed between the casing 31 and the support member 32 as shown in FIG. The fitting projections 115p of the casing 31 are fitted into the pair of fitting holes 32h of the joining plate 32a of the support member 32. Here, the three bolts 32 b screwed to the joining plate 32 a of the support member 32 are respectively screwed and fixed to bolt holes (not shown) provided in the base member 115 of the casing 31.

In detail, the sheet-like member 30a is formed to protrude in the −Z direction at the center of the base member 115 of the casing 31, as shown in FIG. As shown in FIG. 4, the ring-shaped protrusion 115 q having a flat end surface is sandwiched between the upper surface of the joining plate 32 a of the support member 32. As a result, the distance between the −Z side end surface of the annular projection 115q and the + Z side end surface of the joining plate 32a is determined by the sheet-like member 30a.

Returning to FIG. 1, the stamping head 30 is supported by the support member 32 by a U-shaped holder 25 fixed to the + Y side surface of the X moving body 24 of the stamping device 20. Specifically, with reference to FIGS. 2 and 4, bolts (not shown) are respectively inserted into the pair of carriage mounting holes 32 e of the support member 32. Then, the bolt is screwed and fixed to the U-shaped holder 25. Thus, the stamping head 30 is attached to the X moving body 24 (carriage) by the support member 32.

The embossing head 30 of the present embodiment is configured as described above. Then, by changing the sheet-like member 30a as a separation member interposed between the casing 31 and the support member 32 to have a different thickness, the center of the carriage mounting hole 32e (the mounting of the embossing head 30 to the carriage) is changed. The distance La (mm) between the position) and the tip of the stamping pin 33 (see FIGS. 5 to 7) is adjustable.

5 to 7 schematically show the structure and operation of the driving means 40 shown in the region B shown in FIG.

As shown in FIG. 5, when no current is supplied to the solenoid 43, the urging force of the return spring 113 urging the embossing pin 33 in the + Z direction causes the striking force as shown by the broken line in the figure. The engraving pin 33 and the engraving pin drive lever 114 are each in the standby position.

Then, when current is supplied to the solenoid 43 from an external power source and excited, the yoke case 117 and the yoke plate 118 are magnetized. When the core 121 of the yoke case 117 is magnetized, the movable yoke 116 is attracted in the −Z direction as shown by the solid line in the figure. Therefore, along with this, the tip of the stamping pin drive lever 114 rotates in the −Z direction. Along with this, as shown by the solid line in the figure, the base end portion 33a of the stamping pin 33 is pressed in the −Z direction by the stamping pin drive lever 114. As a result, the stamping pin 33 also moves in the −Z direction, and the workpiece 100 is stamped.

On the other hand, when the supply of current to the solenoid 43 is interrupted, the attraction of the movable yoke 116 by the core of the yoke case 117 is released. Then, the urging force of the return spring 113 that urges the stamping pin 33 in the + Z direction causes the stamping pin 33 and the stamping pin drive lever 114 to return to their respective standby positions as indicated by broken lines in the figure. .

Next, a method for adjusting the distance La using the sheet-like member 30a in the present embodiment will be described. Here, in practice, adjustment is performed including variations due to assembly accuracy and processing accuracy in the dimension of the casing 31 in the Z-axis direction, and variations in the length of the stamping pin 33. Here, in order to simplify the description, it is assumed that the dimension of the casing 31 in the Z-axis direction is constant and only the length of the stamping pin 33 varies.

Here, it is assumed that the stamping pin 33 has three types of 33l, 33m, and 33s having different lengths. Further, it is assumed that each length has a relationship of 33l> 33m> 33s. FIG. 5 shows a stamping head 30l provided with 33l, FIG. 6 shows a stamping head 30m provided with 33m, and FIG. 7 shows a stamping head 30s provided with 33s.

In FIG. 5, the thickest sheet-like member 30a is used. Correspondingly, the end surface on the −Z side of the annular projection 115q and the end surface on the + Z side of the joining plate 32a are separated from each other. Here, a distance La = Lal (mm) between the center of the carriage mounting hole 32e and the tip of the stamping pin 33 in FIG.

In FIG. 6, a sheet-like member 30a having a thickness smaller than that shown in FIG. 5 is used. Correspondingly, the distance between the end surface on the −Z side of the annular projection 115q and the end surface on the + Z side of the joining plate 32a becomes shorter. If the distance La = Lam (mm) at this time, then Lal = Lam. Thus, the thickness of the sheet-like member 30a is determined according to the length of the embossing pin 33 so that the distance La is constant.

In FIG. 7, a sheet-like member 30a having a thickness thinner than that shown in FIG. 6 is used. Correspondingly, the distance between the end surface on the −Z side of the annular projection 115q and the end surface on the + Z side of the joining plate 32a is shorter than that shown in FIG. If the distance La = Las at this time, then Lal = Lam = Las. Thus, the thickness of the sheet-like member 30a is determined according to the length of the embossing pin 33 so that the distance La is constant.

A method for actually determining the thickness of the sheet-like member 30a will be described below.
That is, first, the casing 31 and the support member 32 are fixed using the bolts 32b with the sheet-like member 30a interposed between the casing 31 and the support member 32, and the embossing head 30 is assembled.

Next, the distance La between the center of the carriage mounting hole 32e and the tip of the stamping pin 33 is measured. Since the stamping head 30 of this embodiment includes nine stamping pins 33, the distance La is measured for all nine stamping pins 33.

From the obtained data, the maximum distance La (max) and the minimum distance La (min) are selected. The thickness of the sheet-like member 30a is set such that the distance La between the center of the carriage mounting hole 32e and the tip of the stamping pin 33 is a distance La (medium) = (La (max) + La (min)) / 2. To decide.

According to the above-described method, the variation in the length of the casing 31 in the Z-axis direction is offset by changing the thickness of the sheet-like member 30a sandwiched between the casing 31 and the support member 32. The distance La can be adjusted within the range of variations in the length of the stamping pin 33. By adjusting the distance La by such a method, it is possible to avoid the problem that the dimensional variation in the Z-axis direction of the plurality of parts constituting the casing 31 is accumulated and reflected in the distance La.

In the stamping device 120, the distance Lb (mm) from the mounting surface of the workpiece 100 to the mounting position of the stamping head 130 is normally managed within a specified range. Therefore, in order to keep the distance Lc (mm) between the tip of the stamping pin 33 and the mounting surface of the workpiece 100 within the specified range, it is only necessary to manage the variation of the distance La (= Lb−Lc). become.

According to the stamping head 30 of this embodiment, it is possible to reduce variations in the distance La between the center of the carriage mounting hole 32e and the tip of the stamping pin 33. For this reason, the distance Lc between the mounting surface of the workpiece 100 and the tip of the stamping pin 33 is stable within the range of variations in the position of the workpiece 100 in the Z-axis direction. Therefore, the depth of dots on the surface of the workpiece 100 can be made substantially constant. This improves the stamping quality.

Further, as shown in FIG. 5 to FIG. 7, the stamping pin 33 and the stamping pin drive regardless of the thickness of the sheet-like member 30a interposed between the casing 31 and the support member 32. Each standby position of the lever 114 remains unchanged. This is because the distance Lc between the mounting surface of the workpiece 100 and the tip of the stamping pin 33 is adjusted by adjusting the separation distance between the casing 31 and the support member 32 using the sheet-like member 30a. Because it is.

As described above, the embossing head 30 according to this embodiment includes the casing 31 and the support member 32 that are independent from each other, and the separation member that is interposed between the casing 31 and the support member 32. Further, the separation member is composed of a sheet-like member 30a having a uniform thickness. For this reason, the distance La between the center of the carriage mounting hole 32e and the tip of the stamping pin 33 can be adjusted by changing the sheet-like member 30a to one having a different thickness. For this reason, in the stamping apparatus 20, when the distance La is not within the specified range when the stamping head 30 is replaced with a new one, it is only necessary to change the sheet-like member 30a to one having a different thickness. It becomes possible to be within the specified range. In addition, since the casing 31 and the support member 32 are configured independently, even if the distance La is adjusted by interposing the sheet-like member 30a therebetween, the lower surface of the annular projection 115q and the joining plate The standby positions of the stamping pin 33 and the stamping pin drive lever 114 are unchanged only by changing the distance from the upper surface of 32a. For this reason, the excitation conditions of the solenoid 43 are not changed, and the adjustment of the marking head 30 is facilitated.

Further, according to the embossing head 30 of the present embodiment, the thickness of the sheet-like member 30a can be changed in advance so that the distance La falls within a specified range. This eliminates the need for adjusting the distance La when the stamping head 30 is replaced with a new one. Therefore, the replacement of the stamping head 30 is facilitated.

Furthermore, according to the stamping head 30 of the present embodiment, the casing 31 and the support member 32 are configured independently. Therefore, even if the sheet-like member 30a is replaced, only the distance between the casing 31 and the support member 32 is changed, and the standby positions of the stamping pin 33 and the stamping pin drive lever 114 are not changed. Therefore, the excitation condition of the solenoid 43 does not change, and the pressing force applied to the stamping pin 33 does not change.

Moreover, according to the embossing head 30 of the present embodiment, the casing 31 and the support member 32 are fixed by the three bolts 32b, and the sheet-like member 30a is interposed between the casing 31 and the support member 32. There is only. For this reason, for example, the stamping head 30 is separated into the casing 31 and the support member 32, and the sheet-like member 30a is replaced with one having a different thickness. Thereafter, the distance La can be easily adjusted only by assembling the embossing head 30 using the three bolts 32b.

And according to the stamping head 30 of the present embodiment, the casing 31 and the support member 32 are configured independently, and each is formed into a block. Therefore, since the separation is easy and the components constituting each of them are not separated, the sheet-like member 30a can be easily replaced.

In the present embodiment, the separation member interposed between the casing 31 and the support member 32 is composed of the sheet-like member 30a. However, the present invention is not limited to this, and the separation member having a different size is interposed between the casing 31 and the support member 32, so that the distance between the casing 31 and the support member 32 (the annular protrusion 115q and the joining plate) is reduced. Of course, other shape members such as a block shape can be used as long as the distance (with respect to the upper surface of 32a) can be accurately adjusted.

It should be noted that the present invention can be variously modified and modified without departing from the broad spirit and scope of the present invention. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention.

This application is based on Japanese Patent Application No. 2009-241484 filed on Oct. 23, 2009. The specification, claims, and entire drawings are incorporated herein by reference.

The stamping head and the stamping device of the present invention are suitable for stamping dots on an object to form a pattern composed of dots.

20 Stamping device 24 X moving body (carriage)
30 Stamping head 30a Sheet-like member (separation member)
31 Casing (first part)
31a Lever holder 31b Lever holder top plate 31h Recess 32 Support member (second part)
32b Bolt 32e Carriage mounting hole 33 Stamping pin (wire-shaped member)
33a Base end (large diameter part)
40 Drive means 43 Solenoid 113 Return spring (coil spring)
114 Stamping pin drive lever 115 Base member 116 Movable yoke 117 Yoke case 118 Yoke plate

Claims

A stamping head for stamping a workpiece at the tip of a stamping pin,
Biasing means for urging the stamping pin in a direction away from the workpiece, and driving means for applying a pressing force to the stamping pin in a direction approaching the workpiece against the biasing force And a first portion in which the embossing pin is disposed,
A second portion that is bonded to the first portion and that holds the stamping pin in a state of being attached to a carriage of the stamping device;
By changing the separation member interposed between the first part and the second part to a different size, the distance between the mounting position on the carriage and the tip of the stamping pin can be adjusted. A stamping head characterized by
The first part and the second part are configured by integrating a plurality of parts, respectively.
The stamping head according to claim 1, wherein:
The biasing means is disposed in the first portion such that one end thereof is in contact with a part of the first portion and the other end is in contact with a portion of the embossing pin. The marking head according to claim 1 or 2.
The embossing pin is a wire-like member having a tip portion formed in a conical shape or a wedge shape, and the urging means is a coil spring inserted through the wire-like member, 4. The stamping head according to claim 3, wherein the stamping head is disposed in the first portion so as to abut on a large diameter portion located at a proximal end of the stamping pin.
5. The stamping according to claim 1, wherein the first part and the second part are assembled by bolting with a separating member interposed therebetween. head.
A stamping head having a plurality of stamping pins, and supporting the stamping head movably with respect to the stamped object, and projecting the stamping pin from the stamping head to stamp the workpiece. A stamping device comprising:
A stamping apparatus using the stamping head according to claim 1 as the stamping head.