JPH0730357Y2 - Printer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a printing device for printing predetermined characters, symbols, numbers, etc. on the surfaces of electric wires and cables.

2. Description of the Related Art On the surface of electric wires and cables, certain characters, symbols, numbers, etc. are printed for the name of the manufacturer, quality indication, etc., and a printing device with a printing roll is frequently used to perform such printing. Has been done. FIG. 4 shows an example of the printing apparatus.

The printing device 1 has a storage tank 2 in which the printing ink I is stored, and a printing roll 4 in which predetermined characters, symbols, and numbers are formed on the outer peripheral surface. The printing roll 4 is attached to a printing roll shaft 6, and the printing roll shaft 6 is rotatably held by a bearing 10 fixed to an opening edge flange 8 of the storage tank 2. Accordingly, the printing roll 4 is partially immersed in the printing ink I in the storage tank 2, and the appropriate amount of the ink I is supplied to the surface of the printing roll 4. On the other hand, the electric wire or cable C is brought into contact with the printing roll 4, and desired characters or the like are printed on the surface of the electric wire or cable C that moves with the rotation of the printing roll 4.

In the conventional apparatus configured as above, the print roll 4 is frequently replaced with another print roll,
Therefore, the printing roll 4 needs to be detachably attached to the printing roll shaft 6. Therefore, the printing roll shaft 6 is a stepped shaft, and the mounting shaft portion 6a has a large diameter in the center.
And a center mounting hole portion 4a of the printing roll 4 is formed on the shaft portion 6a.
And the movement of the printing roll 4 in the axial direction is caused by a flange 6b integrally formed adjacent to the mounting shaft portion 6a and a stopper 12 removably fitted to the printing roll shaft 6. It was regulated.

However, the stopper 12 is fixed to the printing roll shaft 6 by the stopper bolt 14, and the stopper bolt 14 is loosened during the operation of the printing apparatus, so that a gap is generated between the printing roll 4 and the stopper 12. It happened that the printing roll 4 rattled in the axial direction. Such play in the axial direction of the printing roll 4 naturally causes printing defects, which causes a problem.

Further, in the printing apparatus having the above structure, when the printing roll 4 is set on the printing roll shaft 6 by the stoppers 12 or the like, a jig for roll setting is often used, and the work is complicated, There were also accidents that damaged the surface of the printing roll.

Object of the Invention The object of the present invention is to facilitate the replacement of the printing roll, and to prevent the printing roll from rattling in the axial direction of the mounting shaft during operation, and to perform good printing on the surface of electric wires and cables. It is to provide a printing device for printing characters and the like.

Means for Solving the Problems The above object is achieved by the printing apparatus according to the present invention. In summary, the present invention relates to a printing apparatus having a printing roll for printing predetermined characters, symbols, numbers, etc. on the surface of an electric wire or cable, and a printing roll shaft carrying the printing roll. The shaft is a stepped shaft, and has a large-diameter mounting shaft portion that fits in the center hole of the printing roll and a flange that is larger in diameter than the mounting shaft portion and that is formed adjacent to the mounting shaft portion. The printing roll shaft further has a small-diameter shaft portion that abuts a side surface of the printing roll fitted to the large-diameter printing roll mounting shaft portion to elastically move the printing roll toward the flange. An elastic stopper means for pressing is provided, and the elastic stopper means includes a first stopper fitting slidably fitted to a small-diameter shaft portion of the printing roll shaft and arranged adjacent to the printing roll, and the stopper. With a second fastener that is slightly spaced A compression spring arranged between the two stoppers, and a knock pin penetrating the printing roll shaft outside the second stopper so as to restrict axial movement of the second stopper. Is provided, the knock pin is made smaller than the diameter of the center hole of the printing roll, a through groove through which the knock pin can pass is formed in the first stopper, and the second stopper is provided with the through hole. Similar to the first stopper, the printing apparatus is characterized in that a through groove through which the knock pin can pass and a knock pin fitting groove formed in a manner intersecting with the through groove are formed.

Embodiment Next, one embodiment of the printing apparatus according to the present invention will be described in more detail with reference to the drawings.

Referring to FIGS. 1 and 2, a printing apparatus according to the present invention.
1A has a configuration similar to that of the conventional printing apparatus 1 described with reference to FIG. 4, and is different only in the configuration in which the printing roll is attached to the printing roll shaft 6, and the members performing the same operation are the same. The same reference numerals are given and detailed description is omitted. Further, since the manner of mounting the storage tank 2 and the printing roll shaft 6 can be the same as the conventional one, it is omitted in FIG. 1 showing this embodiment.

According to the present invention, the printing roll shaft 6 is a stepped shaft and has a large diameter mounting shaft portion 6a that fits in the central hole portion 4a of the printing roll 4.
And a flange 6b having a larger diameter than the mounting shaft portion 6a and formed adjacent to the mounting shaft portion 6a. Further, the small diameter shaft portion 6c of the printing roll shaft 6 has the large diameter printing. Elastic stop means 20 is provided for abutting the side surface of the printing roll 4 fitted to the roll mounting shaft portion 6a to elastically press the printing roll 4 toward the flange 6b. That is, the movement of the printing roll 4 in one direction along the axial direction is caused by the mounting shaft portion.
The movement of the printing roll 4 in the other direction along the axial direction is restricted by the integrally formed flange 6b adjacent to 6a.
Elastic stopper means 20 is used instead of the stopper 12 used in the printer of FIG.

The elastic stopper 20 is slidably fitted to the small diameter shaft portion 6c of the print roll shaft, and is slightly separated from the first stopper 22 disposed adjacent to the print roll 4. And the second stoppers 24 arranged as
A compression spring 26 is arranged between them. In the present embodiment, the compression spring is a coil spring, and is mounted in a manner to be fitted to the boss portions 22a and 24a formed on the both stoppers 22 and 24.
Further, a knock pin 28 is provided on the outside of the second stopper 24 so as to pass through the small diameter shaft portion 6c of the printing roll shaft in order to restrict the movement of the second stopper 24 in the axial direction. A groove 30 is formed on the surface of the second stopper 24 to fit the knock pin.

According to the present invention, the knock pin 28 is made smaller than the diameter of the hole 4a of the printing roll, and the first stopper 22 is formed with the through groove 32 through which the knock pin can pass (FIG. 3).
Like the first stopper, the stopper 24 has a through groove 34 through which the knock pin can pass (FIG. 2). The through groove 34 of the second stopper 24 is formed so as to cross the knock pin fitting groove 30 in a cross shape. With this structure, when the second stopper 24 is rotated 90 degrees, the printing roll 4, both stoppers 22 and 24, and the coil spring 26 do not remove the knock pin 28 from the shaft 6 by a simple operation. It is easily removable.

Advantageous Effects of Invention As described above, the printing apparatus according to the present invention is provided with the elastic stopper means that abuts the side surface of the printing roll and elastically presses the printing roll toward the flange of the printing roll shaft.
The elastic stopper includes a first stopper fitting slidably fitted to the small-diameter shaft portion of the printing roll shaft and arranged adjacent to the printing roll, and a first stopper located slightly separated from the stopper. A second press stop and a compression spring disposed between the two stop presses, and a printing roll for restricting the axial movement of the second stop stop outside the second stop stop. A knock pin is provided penetrating the shaft, the knock pin is made smaller than the diameter of the center hole of the printing roll, and the first stopper is formed with a through groove through which the knock pin can pass.
Like the first fastener, the second fastener has a through groove through which the knock pin can pass and a knock pin fitting groove formed in a manner intersecting with the through groove. For this reason, when the second stopper is rotated 90 degrees, the printing roll, both stoppers and the coil spring can be easily attached and detached without removing the knock pin from the shaft by a simple operation. Easy to replace,
In addition, the printing roll does not rattle in the axial direction of the mounting shaft during operation, and good printing can be performed.

[Brief description of drawings]

FIG. 1 is a sectional view of a part of a printing apparatus according to the present invention. FIG. 2 is a front view of the second stopper. FIG. 3 is a front view of the first stopper. FIG. 4 is a sectional view of a conventional printing device. 2: Ink storage tank 4: Printing roll 6: Printing roll shaft 6a: Large diameter part 6b: Flange 6c: Small diameter part 20: Elastic stop means 22: First stopper 24: Second stopper 26: Compression spring 28: Knock pin

Claims (1)

[Scope of utility model registration request] 1. A printing apparatus having a printing roll for printing predetermined characters, symbols, numbers, etc. on the surface of an electric wire or cable, and a printing roll shaft carrying the printing roll, wherein the printing roll shaft is It is a stepped shaft, and has a large-diameter mounting shaft part that fits in the central hole of the printing roll, and a flange that is larger in diameter than the mounting shaft part and is formed adjacent to the mounting shaft part. Further, the small diameter shaft portion of the printing roll shaft is brought into contact with the side surface of the printing roll fitted to the large diameter printing roll mounting shaft portion to elastically press the printing roll toward the flange. Elastic stop means is provided, and the elastic stop means includes a first stopper fitting slidably fitted to a small-diameter shaft portion of the printing roll shaft and arranged adjacent to the printing roll, and slightly smaller than the first stopper. A second stopper, which is spaced apart, and both stoppers. A compression spring disposed between the metal fittings, and a knock pin penetrating the printing roll shaft to restrict the movement of the second metal fitting in the axial direction outside the second metal fitting. The diameter of the knock pin is smaller than the diameter of the center hole of the printing roll, a through groove through which the knock pin can pass is formed in the first fastening member, and the second fastening member has the first fastening member. A printing apparatus, which has a through-groove through which the knock pin can pass and a knock-pin fitting groove formed in a manner intersecting with the through-groove, like the stopper.