JPH0638689Y2 - Platen roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a platen roll used in a word processor printer or the like, and particularly to a platen roll excellent in sound deadening.

[Conventional technology]

Conventionally, as this type of platen roll, a metal tube made of an aluminum alloy or the like, or a metal rod having an outer peripheral surface covered with an elastic body made of hard synthetic rubber or the like has been generally used. Since it is extremely large, noise was a big problem.

Therefore, in order to reduce the dot sound, a muffling type core material has been used in which a large number of protrusions are provided on the surface along the axial direction.

[Problems to be solved by the device]

However, the platen roll using the above-mentioned sound deadening type core material is effective in terms of preventing bending in the axial direction and noise due to reverberation, but propagates the dot sound hitting the surface of the ridge in the lateral direction. It was not possible to eliminate the drawback of noise caused by noise.

The present invention has been devised to solve the above-mentioned drawbacks of the conventional products, and an object thereof is to provide a platen roll having excellent sound deadening properties.

[Means for Solving the Problems] The present invention has been devised in view of the above, and is a core material made of an aluminum alloy or the like having a plurality of protrusions protruding along the axial direction on its surface. A platen roll having a circumferential surface coated with an elastic body such as rubber, in which one or a plurality of cuts along the spiral direction centering on the axis of the core material are formed on the protrusion.

〔Example〕

Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.
FIG. 1 is a partially cutaway perspective view showing an embodiment of a platen roll according to the present invention, FIG. 2 is a sectional view of the same as above, and FIGS. 3 and 4 are front views of a core material as the member. Then, in the figure,
Reference numeral 1 is a core material made of an aluminum alloy or the like, and includes a shaft core 1a, an outer cylinder 1b formed concentrically with the shaft core 1a, and a shaft core.
1a and a three-piece web 1c that connects the outer cylinder 1b, 2 is a ridge formed along the axis of the outer cylinder 1b, and 3 is a ridge 2. The two cuts formed on the core material 1 are formed along the spiral direction centering on the axis of the core material 1 while intersecting with each other, and 4 is a synthetic material coated on the outer periphery of the core material 1. An elastic body made of rubber or synthetic resin.

The cut 3 may be provided with a plurality of threads such as a double thread screw or a triple thread screw other than the single thread screw shown in FIG. 3, or by crossing these as shown in FIGS. 1 and 3. Does not matter.

[Effect of device]

As is clear from the above, in the platen roll of the present invention, a large number of protrusions 2 are provided on the surface of the core material 1 along the axial direction, and the slits 3 along the spiral direction around the axis of the core material 1 are formed. Since it is composed of a single line or multiple lines, the lateral propagation of the dot sound hitting the surface of the ridge 1 is blocked by the cuts 3, and the dot sound is significantly reduced compared to the conventional product. In addition, since the cut 3 is formed by a simple cutting process, the cut 3 is provided with features that can be provided at a relatively low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a platen roll according to the present invention, FIG. 2 is a sectional view of the same as above, and FIGS. 3 and 4 are front views of a core material as the member. Is. 1 ... Core material 2 ... Ridge 3 ... Cut 4 ... Elastic body

Claims (1)

[Scope of utility model registration request] 1. A platen roll formed by coating an elastic body such as rubber on a peripheral surface of a core material made of an aluminum alloy or the like having a large number of projections protruding from the surface along the axial direction.
A platen roll formed by forming one or a plurality of cuts along the spiral direction around the axis of the core material in the protrusion.