JPH0657449B2 - Pencil tail end printing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for performing desired two-color printing on a tail end portion of a pencil.

[Prior Art] Conventionally, the tail end of a pencil is repeatedly coated several times to form a rounded three-dimensional shape, or the tail end of a pencil is polished to have a rounded end, and a ratchet is formed on this surface. After painting, characters and desired characters are printed. For this printing, a kind of intaglio offset printing machine called pad printing has been conventionally used.

[Problems of the prior art] When printing on the tail end of a pencil using a pad printing machine as described above, a single color does not cause a problem, but when printing is performed twice for two-color printing, the first printing is performed. However, there is a problem in that the printing of No. 1 and the printing of the second printing do not match well and a deviation occurs. In this case, if two pad printing machines are used and printing can be performed twice on one pencil conveying line, there is a problem in that the printing cost is increased but the equipment cost is increased and a space is required.

[Means for Solving the Problems] Therefore, the present invention is intended to enable two-color printing to be performed on the tail end portion of a pencil without deviation in one pad printing machine. Is a conveyor in which a large number of holders for holding a pencil in a vertical state are provided at regular intervals, and endlessly intermittently circulates and rotates the holders along an elliptical orbit in a horizontal plane, and a tip of a rotating arm. A pad printing machine in which an elastic pad provided on the lower surface is alternately pressed against the tail end of the pencil and the intaglio held by the holder, and the elastic pad and the intaglio are divided into two rows. , The different colors of ink are replenished to the intaglio for each row, and one row of the elastic pad is pressed against the tail end of the pencil in the middle of the trip on the elliptical orbit and the other row goes back on the oval orbit. Press on the tail ends of the pencils at the same time It is characterized by the fact that it can be removed.

[Operation] The first printing is performed while the pencil held in the holder travels on the oval orbit, and then the pencil makes a U-turn on the oval orbit to perform the second printing on the way. However, the first printing and the second printing are performed simultaneously by the elastic pads of one pad printing machine.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. First, the conveyor A that conveys a pencil will be described. A sprocket is rotatably supported on both ends of a flat rectangular frame 2 horizontally provided on a table 1 so as to be rotatable in a horizontal plane, and an endless chain 3 is wound around the sprocket and one sprocket is attached to a motor 4. Link. The endless chain 3 is provided with a large number of cylindrical holders 5, 5, ... Leaf springs 6 are provided on the peripheral walls of the holders 5, 5, ..., And pencils 7a, 7a inserted into the holders 5, 5 ,.
.., 7b, 7b .. The leaf springs 6 are pressed against the peripheral surfaces to prevent the pencil from sliding off. The endless chain 3 is intermittently circulated by the drive of the motor 4, and the holders 5, 5, ... Cycle endlessly in an oval orbit in a horizontal plane in a direction indicated by an arrow.

B is a load mechanism for mounting four pencils 7a whose tail ends are not yet printed on the holders 5, 5 ... As a set. The load mechanism is not directly related to the present invention, so it is simple. Explain to, pencil 7 stored in Hopper 20
4 a are held by the take-out arm 21, and the pencil 7a held by the take-out arm 21 moves back and forth by the cylinder 22.
It is adapted to be inserted into holders 5, 5 ... By a book extracting shaft 23.

Further, C is an unloading mechanism that lowers the pencils 7b after printing from the holders 5, 5, ..., This is provided with a gripper 25 capable of simultaneously gripping the four pencils 7b at the tip of the take-out arm 24,
By moving the take-out arm 24 up and down by the cylinder 26, the pencils 7b are placed in this position at the four holders 5, 5, ...
It can be removed from the….

Further, D is the pencils 7a, 7 held in the holders 5, 5 ...
b is a gripping device for immovably fixing during printing. The gripping device is held by the holder 5 as shown in FIGS. A board 30 whose both side surfaces are in sliding contact with the opposing surfaces of both pencils is provided between the pencil 7b on the way, and presser plates 31a and 31b are arranged so as to face both side surfaces of the board 30. 31b is fixed to the piston rod end of cylinders 33a and 33b provided on the stands 32a and 32b, and the pressing plates 31a and 31b are brought into contact with and separated from both side surfaces of the substrate 30 by the operation of the cylinders 33a and 33b. Recesses are formed on the opposing surfaces of the pressing plates 31a and 31b so that four pencils 7a and 7b can be respectively wrapped therein. When the pencils 7a, 7b are gripped by the push plates 31a, 31b, the lower ends of the pencils 7a, 7b are in sliding contact with the upper surface of the base 1, and the pencils 7a, 7b are pressed from above by an elastic pad 46 described later. The pencils 7a, 7b are configured so as not to slip inside the holders 5, 5, ....

Next, the pad printing machine E will be described. This pad printing machine E is a partially improved product commercially available from Ohira Kogyo Co., Ltd., in which a swivel shaft 40 is established on one side of the base 1, and a cylinder 41 and a guide column 42 are provided on the swivel shaft 40. 42, 42 are provided vertically, the guide columns 42, 42, 42 are inserted through the base end portion of the swivel arm 43, and the piston shaft of the cylinder 41 is connected to the swivel arm 43. By the operation, the revolving arm 43 moves up and down by about 50 mm along the guide columns 42, 42, 42, and the revolving shaft 40 rotates 90 degrees by the operation of another cylinder (not shown), so that the revolving arm 43 is integrated with this. It turns 90 degrees. Therefore, a mounting shaft 44 is hung at the tip of the revolving arm 43, and a horizontal mounting plate 45 provided at the lower end of the mounting shaft 44 is provided with an elastic pad 46 made of soft silicone rubber. As shown in FIG. 4, the elastic pads 46 are crimped portions 46a, 46a ...
..., 46b, 46b ... are formed. Further, 47 is an intaglio plate, which is divided into a first example 47a with which the crimping portions 46a, 46a of the elastic pad 46 abut, and a second row 47b with which the crimping portions 46b, 46b. Each column has a graphic or a character to be printed on each row, and the crimping portions 46a, 46a ... and
46b, 46b ... Are drawn so as to face each other. In the first row 47a and the second row 47b, inks of different colors are supplied by different figures or characters. Reference numeral 48 is a doctor grade that slides on the first row 47a and the second row 47b of the intaglio plate 47. By scraping the ink with the doctor grade, the ink of the required color is printed on each row of the intaglio plate. Is supplied.

In the printing apparatus configured as described above, the motor 4 stops the endless chain 3 for a certain period of time when the holders 5, 5, ... Are always advanced, and during the stop period, the loading mechanism B causes the pencil 7a to move. 4 units as a set are mounted on holders 5, 5 ... with their tail ends facing up. The pencil 7a placed on the holders 5, 5 ... Is conveyed in the direction of the arrow by the circulation of the conveyor A, and the holding plate 31a reaches the gripping device D and immobilizes the pencil 7a on the way. . The other holding plate 31b makes a U-turn at one end of the conveyor A and the pencil 7b is in the middle of returning.
Immovably fixed. Therefore, in the pad printing machine D, the revolving arm 43 revolves and the elastic pad 46 is positioned on the intaglio plate 47 and lowered, so that the pressure-bonding portions 46a, 46a ... Are pressed to the first row 47a of the intaglio plate. 46b, 46b ... as the second row 47b
To each of the doctor blades 48a,
The ink after being scraped off at 48b is transferred. Then, the elastic pad 46 is lifted and the swivel arm 43 is swung in the opposite direction, and the elastic pads 46 are held by the gripping device D by the pencils 7a, 7a.
.., 7b, 7b ....., and the elastic pad 46 is lowered so that the crimping portions 46a, 46a ..
46b is pressed against the tail end portions of the pencils 7a, 7a ..., Which are on the way of travel and the tail end portions of the pencils 7b, 7b ..., On the way of travel, and the ink is retransferred to each tail end portion. Let
In this case, the sillette of the doll's face is printed in skin color at the tail end of the pencils 7a, 7a on the way, and the face of the pencils 7b, 7b on the way is brown with a brown face. Outline and hair, eyes, nose, etc. are printed. The pencil that has completed printing on the tail end is lowered by the unloading mechanism C from the holders 5, 5, ....

[Effects of the Invention] According to the present invention as described in the above embodiments,
Hold the pencil vertically and circulate it along the elliptical orbit, press the elastic pad on one row of the elastic pad against the tail end of the pencil on the way to the oval orbit, and move the other row on the elliptical orbit. By pressing on the tail end of a pencil in the middle of printing, two-color printing can be done at the same time.
This is useful because it enables color printing and at the same time does not cause color misregistration, and enables high-quality printing on the tail end of a pencil at a low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a tail end printing apparatus according to the present invention, and FIG.
The figure is a longitudinal sectional view of the gripping device, and FIG. 3 is XX of FIG.
FIG. 4 is a view as seen from the direction of arrows, and FIG. 4 is a view as seen from the direction of arrows YY of FIG. A: conveyor, D: gripping device, E: pad printing machine, 3 ... endless chain, 4 ... motor, 5 ... holder,
7a, 7b ... Pencil, 43 ... Swivel arm, 46 ... Elastic pad, 47 ... Intaglio.

Claims (1)

[Claims] 1. A conveyor comprising a plurality of holders for holding a pencil in a vertical state at regular intervals, which endlessly intermittently circulates the holders along an elliptical orbit in a horizontal plane, and a swing arm. An elastic pad provided on the lower surface of the tip portion of the pad printing machine, which is adapted to be alternately pressed against the tail end portion and the intaglio of the pencil held by the holder,
The elastic pad and the intaglio plate are divided into two rows. The intaglio plate is replenished with ink of a different color for each row, and one row of the elastic pad is attached to the tail end of the pencil in the middle of the forward movement on the oval orbit. A tail end printing device for a pencil, wherein the other end of the pencil is pressed simultaneously against the tail end of the pencil on the way back to the elliptical orbit.