JPS6021239Y2 - Stamp devices such as automatic projection stamp machines - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a stamp device such as an automatic projection stamping machine used for post office postmarks and various approval stamps.

In other words, the purpose of this invention is to fix a stamp device such as an automatic projection stamp machine that has been provided in the past at approximately the center in the longitudinal direction of a forward and reverse rotating shaft that is pivotally supported between each machine frame. The plate cam is fitted with a plate cam, an idling part for stopping the movable platform and a pinion gear which is loosely fitted in the boss part of the pinion gear which is loosely fitted approximately in the center in the longitudinal direction of the forward/reverse rotation shaft, and a idling part for stopping the movable table and the idling part to be fitted into this idling part. The support member below the plate cam has a torque pin fixed to the reverse rotating shaft, a pressing piece for pressing down the printing plate protruding from the tip, and a spring for pressing the plate cam wrapped around the base end shaft. By installing an ink application mechanism consisting of a swingably pivoted printing plate pressing arm and an ink vat provided on a support member below the pressing piece, the printing plate is removed every time the movable table makes one reciprocation in the front and back direction. We provide stamping devices such as automatic projection stamping machines that can reliably apply ink to the backing paper, completely prevent not only stamp leakage but also stamp unevenness when stamping on a mount, and always produce clear stamps. It's about doing.

An embodiment of this invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, a pair of machine frames 4 and 5, whose lower parts are connected by a front connecting rod 2 and a rear connecting rod 3, are mounted on an underframe 1. It is installed upright using 2°3 screwing means.

At the front end of the underframe 1 and the machine frames 4 and 5, there is a front connecting rod 2.
A leaf spring 7 is placed on the upper ends of several height adjustment screws 6 screwed together from below, and both ends are fixed to the lower parts of the machine frames 4 and 5, and the upper ends of each height adjustment screw 6 are constantly pressed. A platen 8 for placing a stamped mount S is provided.

On the other hand, a stamp device A is provided on the mount S in each of the machine frames 4 and 5.
, 5, an output shaft 10 of a forward/reverse motor 9 fixed at the rear of the motor.
and a pulley 12 of a forward/reverse rotating shaft 11 which is pivotally supported at approximately the center in the longitudinal direction between each machine frame 4, 5, are connected by a chain 13. A pinion gear 14 with a boss portion 30 is loosely fitted on the 12 side.

In addition, between each horizontal rail 15.16 having a U-shaped cross section fixed to the inner surface of each machine frame 4, 5 so as to face each other, there are guides for transfer within each horizontal rail 15.16 arranged at both ends. car 1
7.18, a rack gear 19 for meshing with the pinion gear 14 of the forward/reverse rotating shaft 11 fixed to the lower surface, and two pairs (
The printing plate 2 is pivotally supported via link rods 20 (4 in total).
1 is mounted so as to be horizontally movable in the forward and backward direction as the forward and reverse rotation shaft 11 rotates forward and backward.

In this case, the link rod 20 is a pair of link rods 20 on the front side.
It is swung forward and downward by the elastic force of a torsion coil spring 23 wound around the shaft of the link rod 20, and is swung approximately 25 degrees downward from the horizontal by a stopper 24 provided near the shaft of the pair of link rods 20 on the front side. It is designed to prevent it from being swung upwards from the inclined position.

In addition, the printing plate 21 is removably attached from the front via a printing plate frame 26 to a printing plate block 25 which is pivotally supported by the tips of two pairs of link rods 20 so that the lower surface thereof is horizontal. Guide rollers 27 are pivotally supported at both ends of the front upper part of the printing plate block 25.

Therefore, in the stamp device A, the forward/reverse rotation shaft 11 is rotated in the forward direction via the chain 13 by the forward rotation of the forward/reverse motor 9, and then the movable table 22 is horizontally moved forward by the engagement of the pinion gear 14 and the rack gear 19. Along with this, the printing plate 21 supported via each link rod 20 also moves forward, and then the guide roller 27 of the printing plate block 25 moves forward.
The printing plate 21 swings each link rod 20 against the elastic force of the torsion coil spring 23 while being guided by a semi-arched track 28 on both sides provided on the inner surface of each machine frame 4, 5 above the platen 8. While moving, the stamp is lowered toward the platen 8 and stamped on the mount S.

When the stamp operation is completed, the forward/reverse motor 9 is rotated in the reverse direction, and after performing the above-mentioned reverse operation, the state before the start of the stamp operation is restored.

Stamp device A of the automatic projection stamp machine formed in this way
The ink application mechanism B is installed at.

This ink application mechanism B is similar to the third ink application mechanism shown in FIGS. 1 and 2.
As shown in the figures and FIG. 4, a plate cam 29 for vertical motion conversion, which has a bulge 33 on a part of the circumferential surface, is fixed to approximately the center in the longitudinal direction of the forward/reverse rotating shaft 11. In addition, an idling part 31 is provided in the boss part 3o of the pinion gear 14 by approximately 180 degrees in the circumferential direction, and a forward and reverse rotating shaft 11 is provided in the idling part 31.
The torque pin 32 fixed to is fitted.

In this case, the positional relationship between the protruding portion 33 of the plate cam 29, the torque pin 32, and the boss portion 30 of the pinion gear 14 is
When the bulging portion 33 of No. 9 rotates directly below, the torque pin 32 is positioned approximately 135 degrees behind, and the uncut boss portion 30 of the pinion gear 14 is positioned approximately directly below. .

On the other hand, a support member 34 at the rear of the forward/reverse rotating shaft 11 directly below the plate cam 29 has a push-down piece 35 projecting from its tip with an upside-down shape on its side. Plate pressing arm 3 wrapped around a spring 36 for pressure contact
7 is pivotally supported so as to be able to swing freely as the plate cam 29 rotates, and a support member 38 below the pressing piece 35 of the printing plate pressing arm 37 has an ink pad 39 made of rubber impregnated with ink. is fixed with screws or the like via a support plate 40.

That is, as shown in FIG. 3, when the plate cam 29 rotates with the rotation of the forward/reverse rotating shaft 11 and the bulging portion 33 is directly below, the pressing piece 35 of the printing plate pressing arm 37 is pressed against the spring 36.
The printing plate 21 and the ink pad 39 are brought into close contact with each other, and ink is applied to the printing plate 21.

During this ink application, the torque pin 32 is rotating in the idling portion 31 of the pinion gear 14, so even if the forward/reverse rotating shaft 11 is rotating, the pinion gear 14 will be idling and the moving table 22 will be temporarily stopped. Become.

When the forward/reverse rotating shaft 11 further rotates, the bulge 3 of the plate cam 29
3 is removed from the upper surface of the printing plate pressing arm 37, and the pressing piece 35 of the printing plate pressing arm 37 is pushed up by the elastic force of the spring 36, and at the same time, the printing plate 21 also returns to its original position.
After the ink application is completed, the torque pin 32 comes into contact with the end surface of the boss portion 30 of the pinion gear 14, and the pinion gear 14 begins to rotate.

Accordingly, the moving table 22 is moved forward and enters the stamping process (see FIG. 4).

In addition, 41 is a light source chamber that houses a lamp, 42 is a film fixing part with the same impression as the printing plate 21, 43 is a projection part consisting of a lens and a prism, and 44 and 45 are a motor and a fan, respectively, for preventing overheating of the light source chamber 41. be.

This invention has been developed by installing an ink application mechanism B consisting of a plate cam 29, an idling part 31, a torque pin 32, a printing plate pressing arm 37, an ink vat 39, etc. in a stamp device such as an automatic projection stamping machine. Since ink can be reliably applied to the printing plate 21 every time the printing plate 22 makes one reciprocation in the front and back direction,
When stamping on the mount S, it goes without saying that the stamp may be omitted.
To completely prevent stamp unevenness and to always perform clear stamping.

Moreover, the support member 3 below the plate cam 29 of the forward/reverse rotating shaft 11
4, a printing plate pressing arm 37 is swingably supported on the base end shaft portion via a spring 36 for press-contacting the plate cam 29;
By fitting the idling portion 31 of the pinion gear 14 to the torque pin 32 of the forward/reverse rotating shaft 11, the ink application operation can be performed extremely smoothly and reliably.

As explained above, according to this invention, when stamping on a mount, not only stamp leakage but also stamp unevenness can be completely prevented, and the stamp can always be clearly stamped, and the ink application operation can be extremely smooth and reliable. Various effects such as these can be obtained.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, so Fig. 1 is a left side view showing the inside of the automatic projection stamping machine, Fig. 2 is a partially cutaway front view with the same part omitted, and Figs. 3 and 4. The figure is a left side view showing the operation of the ink application mechanism, FIG. 3 shows the ink application state, and FIG. 4 shows the stamp state after ink application. A: Stamp device, B: Ink application mechanism, S: Mounting paper, 1: Underframe, 2
...Front connecting rod, 3... Rear connecting rod,
4, 5... Machine frame, 6... Height adjustment screw, 7... Leaf spring, 8... Platen, 9
...Forward/reverse motor, 10...Output shaft,
11...Forward/reverse rotating shaft, 12...Pulley, 13...Chain, 14...Zenion gear, 15, 16...Horizontal rail, 17,1
8... Guide car, 19... Racking,
20...Link rod, 21...Print plate, 2
2...Moving table, 23...Torsion coil spring, 24...Stopper, 25...
Print plate block, 26...Print plate frame, 27...
... Guide roller, 28 ... Orbit, 29 ...
...Plate cam, 30...Boss part, 31...
...Idle part, 32...Torque pin, 33...
...Bulging part, 34.38...Supporting member, 3
5...Pushing piece, 36...Spring,
37...Print plate pressing arm, 39...Ink butt, 40...Support plate, 41...
・Light source chamber, 42...Film fixing part, 43...
...Projection section, 44...Motor 45...
····fan.

Claims (1)

[Scope of utility model registration request] A movable table, on which a printing plate is pivotally supported at its front end via two pairs of link rods, is installed in a pair of machine frames erected on the frame so as to be horizontally movable in the front and back direction. At the front end of the frame,
a trajectory for lowering the printing plate when the moving table moves forward;
In a stamping device such as an automatic projection stamping machine, which is provided with a platen for placing a stamped mount that overlaps when the printing plate is lowered, approximately the center in the longitudinal direction of a forward and reverse rotating shaft supported between each machine frame. A plate cam is fixed to the plate cam, and an idling part for temporarily stopping the movable table is provided in the boss part of the pinion gear which is loosely fitted approximately in the center in the longitudinal direction of the forward/reverse rotating shaft. A support member below the plate cam has a torque pin fixed to the forward/reverse rotating shaft, a pushing piece for pushing down the printing plate protrudes from the tip, and a spring for pressing the plate cam around the base end shaft. A stamping device such as an automatic projection stamping machine, characterized in that an ink application mechanism is installed, which is composed of a printing plate pressing arm rotatably supported on a plate and an ink vat provided on a supporting member below the pressing piece.