JPH0425350Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (1) Industrial application field The present invention relates to a chassis number stamping device for stamping a chassis number on the chassis of a vehicle.

(2) Prior Art Conventionally, such a vehicle number stamping device is known from, for example, Japanese Patent Laid-Open No. 162082/1982.

(3) Problems to be solved by the invention The above-mentioned conventional stamping device has a stamping ring on the yoke,
It is constructed by disposing a character selection block, embossing means, and embossing position changing means, and is large overall. Therefore, it is difficult to perform stamping operations in a relatively narrow space, and collisions with the chassis are likely to occur, causing damage to the chassis.
Furthermore, since the entire part cannot be moved, it is difficult to engrave when the part to be engraved has a curved surface.

The present invention has been developed in view of the above circumstances, and enables stamping to be easily performed even in a relatively narrow space without causing damage to the undercarriage, and also enables marking on curved surfaces of the undercarriage. An object of the present invention is to provide a vehicle chassis number stamping device in which the selection operation of a stamping ring is accurate.

B. Structure of the invention (1) Means for solving the problem The device of the invention has a movable body that can freely change its position; and a support arm that can extend and contract, and is provided on the movable body to change the embossing position. means; a yoke supported at the tip of the support arm perpendicular to the direction of expansion and contraction of the support arm;
A stopper fixed to one end of the yoke; a housing movable along the longitudinal direction of the yoke and supported by the yoke; a plurality of markings on the outer circumferential surface at equal intervals; an embossing ring rotatably supported by the housing so as to face the abutment; an embossing ring provided between the yoke and the housing to drive the embossing ring toward the chassis with the abutment positioned at the back; a drive means; a character selection drive means provided in the housing to drive the embossing ring by angular displacement; the character selection drive means;
A roller gear cam configured such that a plurality of rollers supported radially around the outer periphery of a turret coaxially fixed to an embossing ring sequentially roll within a helical cam groove of a cam having an axis perpendicular to the turret. The turret is connected to a drive motor via a mechanism, and an encoder is coaxially attached to the turret.

(2) Effect In the above configuration, when stamping the chassis number, the movable body moves to abut the back of the chassis at the part to be stamped, and in this state, the number selection drive means stamps the number. The engraving ring is driven through an angular displacement so that the desired engraving comes to the part corresponding to the dowel. Next, the housing, ie, the stamping ring, is driven toward the vehicle chassis by the stamping drive means to perform stamping. Therefore, the housing and the embossing ring are moved backward, the embossing position changing means shifts the position of the pad, and the embossing ring is angularly displaced to select the next engraving, and then the housing and the embossing ring are moved forward. Then, the next stamp is performed, and the vehicle chassis number is stamped by repeating this operation. Furthermore, the character selection driving means has a roller gear/cam mechanism, and since the encoder is coaxially attached to the turret of the roller gear/cam mechanism, the angular displacement position of the turret, that is, the embossing ring can be accurately detected.

(3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 to 3, this embossing device includes a movable body 1 and an embossing position changing means 2 provided on the movable body 1. a yoke 3 supported on the tip of the support arm 10 of the embossing position changing means 2; a stopper 4 fixed on one end of the yoke 3; a housing 5 slidably supported on the yoke 3; An embossing ring 6 rotatably supported by the housing 5, a character selection drive means 7 provided on the housing 5 to drive the embossing ring 6 through angular displacement, and an embossing drive means provided between the yoke 3 and the housing 5. 8.

The movable body 1 is, for example, a movable arm provided on a robot, and its position can be changed arbitrarily.

The embossing position changing means 2 includes a cylindrical guide tube 9 fixed to the movable body 1, a cylindrical support arm 10 slidably fitted into the guide tube 9, and a support arm 10.
A screw member 12 is fixed to the inner end of the support arm 10 and has a screw hole 11 coaxial with the support arm 10. The movable body 1 has a threaded rod 14 rotatably supported at its inner end by a bearing 13 in the cylinder 9, and an output shaft 16 coaxially connected to the inner end of the threaded rod 14 via a coupling ring 15. The shift motor 17 is provided with a shift motor 17 that is fixedly arranged. Furthermore, a slider 18 that can slide within the support arm 10 is fixed to the outer end of the threaded rod 14 .

A keyway 1 extending in the axial direction is provided on the outer surface of the support arm 10.
9 is bored, and a key 20 fixed to the guide tube 9 is engaged with this keyway 19. Therefore, the support arm 10 is prevented from rotating within the guide cylinder 9, but is allowed to move in the axial direction.

In such an embossing position changing means 2, the support arm 10 slides in the axial direction within the guide cylinder 9 in accordance with the rotation of the threaded rod 14 by the operation of the shift motor 17, and the support arm 10 is expanded and contracted. do.

A yoke holder 23 is fixed to the tip of the support arm 10. This yoke holder 23 has a support arm 1
A yoke 3 extending in a direction perpendicular to the zero axis is supported so as to be slidable within a limited range. That is, the cross-sectional shape of the central part in the longitudinal direction of the yoke 3 is formed into a substantially "I" shape with support flanges 24 and 25 projecting to both sides at both upper and lower ends. a guide plate 26 that comes into sliding contact with the surface;
26 is fixed to the yoke holder 23. Further, a plurality of rollers 27 are interposed between the upper surface of the support collar 24 and the yoke holder 23, and each guide plate 26 has a guide roller 28 that rolls in sliding contact with the lower surface of the support collar 24.
or pivoted respectively. Therefore, the yoke holder 23 holds the yoke 3 in a slidable manner.

One end of the yoke 3 is bent downward, and a stopper 4 that can come into contact with the back of the chassis 29 to be stamped is fixed to the other end of the yoke 3. .

A stopper 30 is fixed on the upper surface of the yoke 3 at the other end than the yoke holder 23. A buffer means 3 is provided between the stopper 30 and the yoke holder 23.
1 is interposed. The buffer means 31 includes a stopper 3
A shock absorber 33 is disposed inside the yoke holder 23 with a rod 32 having a head 32a that abuts on the stopper 30 and is interposed between the stopper 30 and the yoke holder 23 on both sides of the shock absorber 33. It consists of a pair of coiled springs 34. The yoke holder 23 and the stopper 30 have mounting holes 35 and 36 facing each other.
A pair of springs 34 are provided, and both ends of each spring 34 are inserted into their mounting holes 35, 36. Moreover, both ends of each spring 34 are engaged with the yoke holder 23 and the stopper 30.

Therefore, relative sliding movement of the yoke 3 with respect to the yoke holder 23 is possible only within the range defined by the buffer means 31.

A housing 5 is supported slidably along the longitudinal direction of the yoke 3 at a lower portion of the longitudinally intermediate portion of the yoke 3 . That is, the housing 5 is provided with a pair of guide parts 37, 3 so as to sandwich the guide plate 39 fixed to the support collar 25 at the lower part of the yoke 3 from both sides.
7 are provided protrudingly, and these guide portions 37, 3
Bearings 38 are interposed between the guide plate 7 and both sides of the guide plate 39, respectively.

Inside the housing 5, an engraved ring 6 having a plurality of engraved markings 40 at equal intervals on the outer peripheral surface is provided.
It is supported so as to be able to freely angularly displace so that it can face the stopper 4. This embossing ring 6 is formed into a disk shape, protruding outward from the housing 5 at least on the side corresponding to the pad 4, and by moving the housing 5 toward the pad 4, the pad can be attached to the back. Desired marking 4 is made on the chassis 29 where 4 is in contact.
It can be stamped by colliding with 0.

Referring also to FIG. 4, the housing 5 includes:
A character selection driving means 7 is provided to drive the embossing ring 6 through angular displacement so that the desired engraving 40 comes to a position corresponding to the pad 4. This character selection driving means 7 is
It includes a drive motor 44 and a roller gear/cam mechanism 45 for decelerating the power of the drive motor 44 and transmitting it to the embossing ring 6.

A sleeve 41 is fixed coaxially to the embossing ring 6, and this sleeve 41 is connected to a plurality of rollers 4.
2 and a bush 43, it is rotatably supported by the housing 5.

The roller gear cam mechanism 45 includes a short cylindrical turret 47 with a bottom, which has a plurality of rollers 46 radially supported on its outer periphery, and a cam 50 that has a spiral cam groove 49 on its outer periphery for rolling each roller 46. The turret 47 is provided with the sleeve 41.
and a cam 50 coaxially connected to the embossing ring 6.
is connected to the drive motor 44 with an axis perpendicular to the axis of the turret 47.

A connecting shaft portion 47a is coaxially and integrally provided at the closed end of the turret 47.
7a is coaxially connected to the sleeve 41. Further, each roller 46 is arranged radially around the outer periphery of the turret 47 so that its axis of rotation runs along the radial direction of the turret 47. Moreover, an encoder 51 fixed and supported by the housing 5 is coaxially connected to the turret 47, and the angular displacement position of the turret 47, that is, the embossing ring 6 is detected by the encoder 51.

A rotary shaft 52 extending in a direction perpendicular to the axis of the turret 47 is provided in the housing 5 with bearings 53 and 5.
The cam 50 is rotatably supported via shafts 4 and 55, and the cam 50 is coaxially fixed to the intermediate portion of this rotating shaft 52. A roller 46 of a turret 47 is rotatably fitted into the cam groove 49 of the cam 50, so that the turret 47, that is, the embossing ring 6, is angularly displaced in response to the rotation of the rotating shaft 52. . Furthermore, such a roller gear/cam mechanism 45 does not require backlash between the rotating shaft 52 and the turret 47, unlike a gear mechanism.

The drive motor 44 is supported and fixed to the housing 5 so as to have an axis parallel to the rotating shaft 52, and an encoder 56 is attached to the drive motor 44. A drive pulley 57 is fixed to the output shaft of the drive motor 44, and a driven pulley 5 is connected to the rotating shaft 52 in correspondence with the drive pulley 57.
8 is fixedly installed. Moreover, an endless cog belt 59 is wound around both pulleys 57 and 58. As a result, the rotating shaft 52
rotates, and is further decelerated by a roller gear/cam mechanism 45 to drive the engraving ring 6 for angular displacement.

The embossing drive means 8 is interposed between the housing 5 and the other end of the yoke 3. This embossing drive means 8
includes an engraving motor 60, a crankshaft 61 parallel to the output shaft 60a of the engraving motor 60, and a connecting rod 62 connected to the crankshaft 61.
, a link 63 that connects the connecting rod 62 and the yoke 3, and a link 64 that connects the connecting rod 62 and the housing 5.
Equipped with.

A gearbox 65 is fixed to the other end side of the yoke 3, and an output shaft 60a parallel to the support arm 10 is connected to the gearbox 65.
The engraving motor 60 is attached by pushing inside. Moreover, the crankshaft 61 is rotatably supported by a gear box 65 via bearings 66 and 67, and a drive gear 68 fixed to the output shaft 60a.
A driven gear 69 fixed to the crankshaft 61 meshes with each other. Therefore, the crankshaft 61 rotates in response to the operation of the engraving motor 60.

Further, a cylindrical protrusion 70 concentric with the crankshaft 61 is protruded from the gearbox 65, and a hole 71 into which the cylindrical protrusion 70 is inserted is formed in the yoke 3.
installed on the side of the The protrusion 70 is fitted to the middle of the hole 71, and a disk portion 72 that can rotate within the hole 71 is coaxially and integrally provided at one end of the crankshaft 61 protruding from the protrusion 70. .
Moreover, a crank pin 73 is eccentrically protruded from the disk portion 72, and this crank pin 73 is provided in the hole 7.
1 and plunges into a circular rotation operating chamber 74 provided in the yoke 3 coaxially with the yoke 1.

An operating slit 75 is provided at the bottom of the other end of the yoke 3 between the lower part of the rotary working chamber 74 and the lower surface, and one end of the connecting rod 62 passes through the working slit 75 into the rotating working chamber 74. It is pushed in and connected to the crank pin 73. The other end of the connecting rod 62 protrudes below the yoke 3.
At the other end of 2 is a pin 76 parallel to the crank pin 73.
One ends of both links 63 and 64 are connected via. The other ends of both links 63 and 64 are connected to the pin 7.
It is connected to the other end of the yoke 3 and the housing 5 via pins 77 and 78 parallel to the yoke 6 .

In such an embossing drive means 8, when the crank pin 73 rotates from the bottom dead center to the top dead center, the housing 5 moves toward the stopper 4, and moves from the top dead center to the bottom dead center. The housing 5 moves away from the stopper 4 by rotating toward the housing 5 . Moreover, the connecting rod 62 connected to the crank pin 73 and both links 63 and 64 constitute a toggle mechanism, and the stamping ring 6 is caused to collide with the vehicle chassis 29 with a relatively large force.

The other end of the crankshaft 61 projects outward from the gearbox 65.
A drum 79 is fixedly installed on the protrusion. Further, the gearbox 65 is provided with an arm portion 80 projecting from the crankshaft 61 and extending parallel to the projecting portion of the crankshaft 61 .

In order to detect the rotational position of the crankshaft 61, that is, the position of the housing 5, a position detecting means 81 is attached to the embossing drive means 8, and this position detecting means 81 is connected to four dogs D attached to the drum 79.
1 to D4, and arm portions 8 corresponding to each dog D1 to D4.
It consists of sensors S1 to S4 provided at 0. Each of the dogs D1 to D4 is connected to the drum 7 at intervals in the axial direction.
9, and the sensors S1 to S4 are also arranged at corresponding intervals from each other.

This position detection means 81 detects four positions along the yoke 3 of the housing 5, that is, the embossing ring 6, and the dogs D1 to D4 are also spaced at intervals in the circumferential direction of the drum 79 corresponding to the four positions. It is placed with a gap between the two. That is, in the position detection means 81, (a) the crank pin 73 is at the bottom dead center and the housing 5 and the stamping ring 6 are located at the maximum rear position, and (b) the housing 5 and the stamping ring 6 are located at the maximum rear position. (c) The housing 5 and the embossing ring 6 are in a further advanced position, which is suitable for selecting characters and changing the embossing position, and (c) the embossing ring 6 is in a slightly advanced position, which is suitable for character selection and changing the embossing position. In order to finish the selection operation of ring 6, (d) crank pin 73
reaches the top dead center and the stamping on the chassis 29 by the stamping ring 6 is completed.

Next, to explain the operation of this embodiment, when stamping the chassis number on the chassis 29, the movable body 1
is displaced to bring the pad 4 into contact with the back of the chassis 29 at the part to be stamped. At this time, the chassis 29 is placed on a hanger (not shown), and there is a risk of misalignment, but the spring 34 of the buffer means 31 causes the pad 4 to elastically abut against the back of the chassis 29, so the misalignment is prevented. Prevented.

A signal regarding the first digit of the vehicle number is input from a card reader (not shown) to a control device (not shown). In response to this, the character selection driving means 7 is operated to angularly displace the embossing ring 6, and the desired engraving 40 moves to a position corresponding to the pad 4. At this time, the operating amount of the drive motor 44 is detected by the encoder 56, and the power of the drive motor 44 is transmitted to the roller gear.
The cam mechanism 45 transmits it to the embossing ring 6 without delay. Moreover, since the angular displacement position of the engraving ring 6 is detected by the encoder 51, the engraving 40 can be accurately placed at a desired position.

Next, the engraving motor 60 of the engraving drive means 8 is operated, so that the housing 5 and the engraving ring 6 are rapidly moved toward the chassis 29, and the engraving 4 is
0 collides with the chassis 29 and the first character is stamped. Moreover, since the shock at this time is absorbed by the buffer means 31, almost no impact is transmitted to the support arm 10, that is, the movable body 1.

When the position detection means 81 detects that the embossing ring 6 has moved back slightly after the first digit has been stamped, the character selection drive means 7 is actuated to angularly displace the embossing ring 6, and the next digit is The stamp 40 moves to a position corresponding to the pad 4. Moreover, at the same time, the engraving position changing means 2 is activated, the support arm 10 is extended, and the stopper 4
is shifted to the engraving position of the next digit.

The position detection means 8 detects that the housing 5 and the engraving ring 6 have moved forward again and have come just before engraving.
1, it is confirmed whether or not the character selection operation of the embossing ring 6 has been completed. As a result, if the character selection operation has been completed, the embossing ring 6 is further advanced to perform embossing, and if the character selection operation has not been completed, the operation of the embossing motor 60 is stopped and the character selection is performed. Terminate operation.

By sequentially repeating such operations, a multi-digit vehicle chassis number is stamped.

After stamping is completed, the operation of the stamping motor 60 is stopped when the position detection means 81 detects that the stamping ring 6 has retreated to the maximum rearward position, that is, that the crank pin 73 has reached the bottom dead center. Then, return the movable body 1 to its original position.

C. Effects of the invention As described above, the device of the present invention has a movable body that can freely change its position; an embossing position changing means provided on the movable body that has a support arm that can be extended and contracted; and the support arm that can be extended and contracted. a yoke supported at the tip of the support arm perpendicular to the direction; a stopper fixed to one end of the yoke; a housing movable along the longitudinal direction of the yoke and supported by the yoke; an outer peripheral surface. an engraving ring rotatably supported on the housing so as to have a plurality of engravings at equal intervals, and to place any engravings facing the abutment metal; An embossing drive means is provided between the yoke and the housing to drive the engraving ring; and a character selection drive means is provided on the housing to drive the engraving ring by angular displacement. It can be made small enough to fit into relatively narrow spaces. Moreover, since the support arm is provided on the movable body, by moving the movable body, it is possible to stamp even the curved surface of the chassis.

Further, the character selection driving means includes a plurality of rollers supported radially around the outer periphery of a turret coaxially fixed to the embossing ring, and sequentially rolling within a spiral cam groove of a cam having an axis perpendicular to the turret. The turret is connected to the drive motor via a roller gear/cam mechanism configured to suit the needs of the user, and an encoder is coaxially attached to the turret, so that the angular displacement of the engraving ring caused by the operation of the drive motor can be accurately controlled to determine the engraving position. Misalignment can be avoided.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a vertical sectional side view, FIG. 2 is a sectional view taken along the line -- in FIG. 1, FIG. The figure is a sectional view taken along the line -- in FIG. 1. DESCRIPTION OF SYMBOLS 1... Movable body, 2... Stamping change means, 3... Yoke, 4... Pad, 5... Housing, 6...
Embossing ring, 7... character selection drive means, 8... embossing drive means, 10... support arm, 44... drive motor,
45... Roller gear/cam mechanism, 46... Roller, 47... Turret, 49... Cam groove, 50...
...Cam, 51...Encoder.

Claims (1)

[Scope of utility model registration request] A movable body that can freely change its position; An embossing position changing means provided on the movable body and having a support arm that can be expanded and contracted; Supported at the tip of the support arm in a direction perpendicular to the direction of expansion and contraction of the support arm. a yoke; a stopper fixed to one end of the yoke; a housing movable along the longitudinal direction of the yoke and supported by the yoke; an engraved ring rotatably supported on the housing so that the engraved part faces the former stopper;
an embossing drive means provided between the yoke and the housing to drive the embossing ring toward the chassis with the pad positioned at the back; and a character selection drive provided on the housing to drive the embossing ring with angular displacement. means; and the character selection driving means includes a plurality of rollers supported radially on the outer periphery of a turret coaxially fixed to the embossing ring within a spiral cam groove of a cam having an axis perpendicular to the turret. 1. A vehicle chassis number stamping device, which is connected to a drive motor via a roller gear/cam mechanism configured to sequentially roll at a turret, and an encoder is coaxially attached to a turret.