JPH0716447Y2 - Marking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a marking device for marking a workpiece such as an automobile engine part.

(Prior Art) A conventional marking device will be described with reference to FIG. Reference numeral 1 is a marking device main body, and 2 is a mount of the marking device main body 1. Stand 2
A guide bar 3 is vertically provided at the upper part of the, and a movable bracket 4 is slidably attached to the guide bar 3. A marking unit 5 described later is attached to the movable bracket 4. A cylinder 7 is attached to a bracket 6 fixed to the center of the pedestal 2, and a piston rod 7a of the cylinder 7 is connected to the movable bracket 4.

Next, the marking unit 5 described above will be described including FIG. In the figure, 8 is a holder of the marking unit 5, and 9 is a notch provided on the front side of the holder 8 (right side in FIG. 4). Reference numeral 10 is a take-in guide attached to the tip of the holder 8, and 11 is a take-in portion whose base end is slidably engaged with the take-in guide 10. Reference numeral 12 is a hammer slidably fitted in the holder 8. The hammer 12 is constantly urged downward by a spring 13. The upper end of the spring 13 is locked to the spring cover 14. Denoted at 15 is a claw disposed so as to be engageable with the hammer 12 through the notch 9 of the holder 8. The claw 15 is a bracket 17 fixed to the pedestal 2 via an arm 16.
It is rotatably supported by. Also, in FIG.
18 is a stopper attached to the bracket 17 to suppress the rotation of the arm 16, and 19 is a claw that engages with the base end of the arm 16.
A push pin attached to the movable bracket 4 for releasing the engagement between the hammer 15 and the hammer 12. In FIG. 4, W is a workpiece such as an automobile engine part.

The marking device thus configured operates as follows.
First, when the workpiece W is positioned at a predetermined position, the cylinder 7 operates, the piston rod 7a of the cylinder 7 shortens, and the movable bracket 4 and the marking unit 5 descend.
Then, the lower part of the hammer 12 of the marking unit 5 abuts and engages with the claw 15. However, the movable bracket 4 and the marking unit 5
Is further lowered, that is, in other words, the holder 8 and the tapin portion 11 of the marking unit 5 are further lowered, so that the hammer 12 is locked at that position against the elastic force of the spring 13. When the holder 8 and the take-in portion 11 are further lowered, the take-in portion 11 is brought into contact with the marking location of the workpiece W, and the movable bracket 4 is lowered to a predetermined position, the push pin 19 provided on the movable bracket 4 causes the claw 15 to move. It engages with the base end of the arm 16 and pushes down the arm 16. With this push down,
The arm 16 rotates to release the engagement between the claw 15 and the hammer 12. Then, the hammer 12 falls by its own weight and the elastic force of the spring 13, and collides with the base end portion of the takein portion 11. Due to this impact, the tapering portion 11 stamps the workpiece W.
When the marking is completed, the cylinder 7 operates again, the piston rod 7a extends, the movable bracket 4 and the marking unit 5 are raised, and the one marking cycle ends.

(Problems to be solved by the invention) However, in the above-mentioned conventional technique, the hammer is dropped in the marking unit, the hammer is made to collide with the base end portion of the takin portion, and the impact causes the marking by the takinin portion. Therefore, there is a problem in that the hammer rebounds due to the impact when the hammer collides with the tapin portion, and the impact is applied to the tapin portion again, resulting in double marking. The present invention has been made in order to solve the above-mentioned conventional problems, and by improving the structure of the hammer provided in the marking unit, a marking device capable of preventing double marking with an extremely simple structure. The problem to be solved is to obtain.

(Means for Solving the Problem) As a means for solving the above problems, the present invention provides a guide member on a frame of a marking device body, and a movable bracket slidably provided on the guide member. And a plurality of marking units for marking a workpiece on the movable bracket, and a hammer mounted slidably in the marking unit via a flexible member. It is characterized by being equipped with a weight that applies a load in the striking direction.

(Operation) With the configuration as described above, when the workpiece is positioned at the predetermined position, the driving means is operated to lower the marking unit together with the movable bracket. When the marking unit descends and its tip comes into contact with the workpiece, the hammer slidably mounted in the marking unit falls and marking is performed. The hammer that has dropped due to the marking will try to rebound due to the impact of the drop, but the weight load will add to the hammer and the hammer will not rebound.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, 21 is a marking device main body, and 22 is a frame of the marking device main body 21. A pair of guide bars 23, which are guide members, are fixed to the frame 22 in the vertical direction. A movable bracket 24 is slidably mounted on the pair of guide bars 23. A plurality of (five in this embodiment) marking units 25 are fixed downward to the movable bracket 24. or,
A bracket 26 is fixed to the center of the pedestal 22, and a cylinder 27 as a driving means is supported by the bracket 26. The piston rod 27a of this cylinder 27 is a knuckle 2
It is connected to the movable bracket 24 via 8. Therefore, the movable bracket 24 moves up and down as the piston rod 27a of the cylinder 27 expands and contracts.

Next, the marking unit 25 will be described in detail including FIG. A holder 29 is provided on the outer periphery of the marking unit 25, and a notch 30 is formed on the front side (right side in FIG. 2) of the holder 29. In addition, the lower end of the holder 29 is
31 is worn. The taping guide 31 is provided with a taping portion 32 for engraving the workpiece W, the base end portion of which is slidably engaged. A hammer 33 is slidably fitted in the holder 29. Hammer 33 is a spring
It is always urged downward by 33A. The upper end of the spring 33A is locked to the spring cover 33B.
Further, the hammer 33 has a perforation 34 formed therein.
A weight 35 is slidably arranged in the 34. The weight 35 is a spring 36 that is a flexible member disposed at the bottom of the perforation 34.
It is swingably supported by. 37 is weight 35 is hammer
It is a stopper provided so as not to deviate from 33. Reference numeral 38 denotes a claw arranged so that the hammer 33 can be engaged with the notch 30 of the holder 29. The claws 38 are provided laterally with respect to the gantry 22 (see FIG. 1), and are rotatable by hinge pins 41 to brackets 40 fixed to both sides of the gantry 22 via arms 39 fixed to both ends thereof. It is supported. A stopper 42 is provided on one bracket 40 (the left bracket 40 in FIG. 1), and the stopper 42 engages with the arm 39 to suppress the rotation of the claw 38. 43 is the arm in place of the movable bracket 24
A push pin mounted so as to engage with the base end of 39.

The operation will be described below. First, when the workpiece W is positioned at a predetermined position, the cylinder 27 operates and the piston rod 27a is shortened, so that the movable bracket 24 and the marking unit 25.
Goes down. When the movable bracket 24 and the marking unit 25 descend, that is, in other words, when the holder 29 and the take-in portion 32 descend, the lower part of the hammer 33 engages with the claw 38, and the hammer 33 resists the elastic force of the spring 33A. It will be locked in that position. When the hammer 33 is locked, only the holder 29 and the take-in portion 32 are lowered while the hammer 33 is locked. When the holder 29 and the take-in portion 32 descend, the take-in portion 32 comes into contact with the marking location of the workpiece W, and the base end portion thereof is pushed up from the take-in guide 31. Then, when the movable bracket 24 is lowered to a predetermined position, the push pin 43 is released by the claw 38.
Engages with the base end of the arm 39 and pushes down the base end of the arm 39. When the base end portion of the arm 39 is pushed down, the arm 39 rotates, and the claw 38 also rotates accordingly.
The engagement of 33 is released. When the engagement is released, the hammer 33 falls by its own weight and the elastic force of the spring 33A and collides with the base end portion of the taping portion 32, and the impact causes the taping portion 32 to mark the marking position on the workpiece W. To do. At the time of marking, the hammer 33 tries to rebound against the elastic force of the spring 36 due to the impact when it abuts on the base end portion of the takein portion 32, but at this time, the load of the weight 35 moves the spring 36. It is added to the hammer 33 through. Therefore, the rebound of the hammer 33 is prevented.

When the marking of the workpiece W is completed, the cylinder 27 operates again, this time the piston rod 27a of the cylinder 27 extends,
The movable bracket 24 and the marking unit 25 rise. As the movable bracket 24 rises, the weight of the claw 38 causes the arm 39 to rotate until the base end of the arm 39 contacts the stopper 42. In this state, the movable bracket 24 returns to the original position, and the one marking cycle ends.

As described above, the marking device of the present embodiment punches inside the hammer 33.
Since the structure is extremely simple, that is, only by forming the 34 and mounting the weight 35 inside the perforation 34 via the spring 36, the manufacturing cost is low and the maintenance work is easy. Further, it is very easy to apply to a conventional marking device, the cost for remodeling is low, and it has an effect of suppressing the cost increase.

(Effect of the Invention) According to the present invention, since a weight for applying a load in the hammer striking direction is attached to the hammer, which is built in the marking unit as described above, through the flexible member, the marking unit can be used for marking. Even if the hammer is dropped, the weight of the hammer is added to the hammer and the rebound of the hammer is prevented. By preventing this rebound, double marking can be avoided.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a first view.
FIG. 3 is a side view of the drawing, FIG. 3 is a sectional view taken along line AA of FIG. 1, FIG. 4 is a side view of a conventional marking device, and FIG. 5 is a sectional side view of a conventional marking unit. 21 …… marking device main body 22 …… frame 23 …… guide bar 24 …… movable bracket 25 …… marking unit 27 …… cylinder 33 …… hammer 35 …… weight 36 …… spring W …… workpiece

Claims (1)

[Scope of utility model registration request] 1. A guide member is provided on a frame of the marking device body,
A movable bracket is provided slidably on the guide member, a drive means for moving the movable bracket is attached to the gantry, and a plurality of marking units for marking a workpiece on the movable bracket are attached and slid on the marking unit. A marking device, wherein a hammer, which is internally movably mounted, is provided with a weight for applying a load in a striking direction of the hammer through a flexible member.