JP2561602Y2 - Cutting pen - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting pen used for an automatic cutting plotter or the like.

[0002]

2. Description of the Related Art Conventionally, as a configuration for fixing and supporting a blade bar so as to be easily exchangeable, a cutting pen having an O-ring interposed between inner rings of a pair of bearings is known.

[0003]

However, in the above conventional apparatus, when the O-ring is strongly clamped between the bearings due to variations in dimensions and the like, the elasticity of the O-ring is lost, and the fixing and clamping force of the blade bar becomes extremely strong. Or, conversely, extremely weak. An object of the present invention is to provide a cutting pen that solves the above-mentioned problem.

[0004]

According to the present invention, a pair of bearings are built in an outer shaft directly or through another member.
The blade bar is inserted into the inner race of the pair of bearings so as to be freely inserted and removed. A fixing tool is provided between the pair of bearings,
The blade bar is press-fitted and locked by an O-ring attached to the fixture so that the blade bar can be pulled out. Therefore, the blade bar is guided rotatably around the axis by a pair of bearings, and is press-fitted and supported by an O-ring so that it can be pulled out.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. 1. An inner shaft 2 is screwed to an outer shaft 1, and a tip 3 is screwed to a front portion of the inner shaft 2. In addition, an O-ring 4 for preventing screw loosening is interposed between the inner shaft 2 and the tip 3. A pair of bearings 5 are built in the front part of the inner shaft 2, and a fixing tool including a front fixing tool 6 and a rear fixing tool 7 is sandwiched between inner rings 5 </ b> A of the bearing 5. To describe the fixing device in more detail,
At the rear outside 6A of the front fixture 6, the front inside 7A of the rear fixture 7
Is press-fitted, and the rear end of the front fixture 6 and the inner step 7 of the rear fixture 7 are
An O-ring 8 is attached between the O-ring 8 and B. Further, the blade bar 9 is inserted into the inner ring 5 </ b> A of the pair of bearings 5 so that it can be freely inserted and removed, and the blade bar 9 is press-fitted and locked by the O-ring 8 so that it can be pulled out. The blade bar 9 has a round bar shape, and the distal end of the blade portion 9A formed at the distal end is formed at a position slightly shifted from the axis. Also, since the rear end portion 9B of the blade bar 9 is formed in a conical shape, when the blade bar 9 is received by a push bar 10 described later, the blade bar 9
Is not impaired. A push rod 10 is screwed into the inner shaft 2 so that its longitudinal position can be adjusted, and an O-ring 11 provided in a concave groove 10A of the push rod 10 is pressed against the inner surface 2A of the inner shaft 2 so that the screw of the push rod 10 is screwed. Loosening is prevented. The conical rear end 9 of the blade bar 9 is provided at the front end of the push rod 10.
B is abutted, and by adjusting the longitudinal position of the push rod 10, the protrusion length of the blade portion 9A of the blade bar 9 is adjusted.

When the cutting pen is attached to an automatic cutting plotter or the like and is moved in the X-Y direction, the cutting pen can freely rotate so that the cutting edge always faces in the traveling direction, and can perform cutting.

FIGS. 2 and 3 show another embodiment of the present invention, in which a fixing member 12 is interposed between inner rings 5A of a pair of bearings 5 built in the inner shaft 2, and is fixed to the fixing member 12. A concave groove 12A partially penetrating inside is formed, and O is formed in the concave groove 12A.
The ring 8 is fitted. Therefore, the concave groove 12A
A part of the O-ring 8 protrudes inward from the part penetrated by
It comes into pressure contact with the blade bar 9.

Although the above embodiment has been described as an optimal embodiment, the present invention is not limited to the above embodiment, and members such as a tip, an outer shaft and an inner shaft are integrally formed with other members. It is also possible to configure, and conversely, even if it is configured to be divided into a plurality of members, the purpose of the present invention is of course not spoiled.

[0009]

As described above, the present invention is characterized in that a fixture is mounted between the inner rings of a pair of bearings, and an O-ring is provided on the fixture. Therefore, O
The ring is attached with an appropriate elastic force without being compressed, and the blade bar press-fitted into the O-ring can be easily pulled out or inserted and replaced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a cutting pen according to the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer shaft 5 Bearing 5A Inner ring of bearing 5 8 O-ring 9 Blade bar 9A Blade portion of blade bar 9B Rear end of blade bar 9 10 Push rod

Claims (1)

(57) [Scope of request for utility model registration] 1. An outer shaft, a blade bar built in the outer shaft so as to be rotatable around an axis, and having a blade portion at a tip of a rod-shaped body, and receiving a conical rear end portion of the blade bar. In a cutting pen consisting of a push rod connected to a shaft, a pair of bearings are built in the outer shaft directly or through another member, and the blade bar is inserted through the inner ring of the pair of bearings so as to be freely inserted and removed,
A cutting pen, wherein a fixing tool is provided between inner rings of a pair of bearings, and an O-ring attached to the fixing tool press-fits and locks the blade bar so as to be able to be pulled out.