JPH07257092A - Mechanism for holding roll paper of plotter - Google Patents

Abstract

PURPOSE:To enable roll paper to be held simply between the legs of a plotter. CONSTITUTION:One end of a roll shaft 38 having a roll paper holding body with a flange 34 is rotatably supported on one leg 28 between a pair of legs 26, 28 for supporting a plotter main body 24, the free end side of the roll shaft 38 is opposed to a shaft securing hole made horizontally through the other leg 26. When the roll paper 56 is inserted between the legs 26, 28 through the shaft securing hole, the roll shaft 38 is inserted into the paper pipe of the roll paper 56. In the next place, as the shaft fixation member 46 is threaded into the screw hole 40 of the shaft securing hole, the paper pipe of the roll paper 56 is forcibly pressed by a flange 52 of the roll paper holding body attached rotatably to the shaft fixation member 46 and a flange 34 of the roll paper holding body, to thus be fixed between the roll paper holding bodies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper mounting mechanism for a paper drive type pen plotter or a raster plotter such as an ink jet printer or a thermal printer.

[0002]

2. Description of the Related Art As shown in FIG. 5, in a conventional paper-driven pen plotter, a roll paper 2 is manually hooked between a pair of legs 6 and 8 fixed to a plotter body 4. It is mounted on the rack. To mount the roll paper 2, first, one end 10a of the roll shaft 10 that holds the roll paper 2 is inserted into a mounting hole of a mounting box 12 that is fixed to the inner surface of the leg body 6,
After that, the end pin 16 of the fixed flange 14 is aligned with the mounting hole 20 of the mounting box 18 fixedly installed inside the leg body 8, the end pin 16 and the drive shaft 22 are aligned with each other, and then inserted into the mounting hole 20.

[0003]

In the conventional plotter, when the roll paper is attached, the roll shaft is removed from between the legs, the roll paper is set on the roll shaft, and then the roll paper is fixed between the legs. It is troublesome to attach it to the position. Also, the roll paper is heavy, and it is not easy to attach it to the limited space between the legs, and in particular, the device that pulls out the roll paper by rotating the motor by connecting the end pin on the fixed flange side to the drive shaft. Then, there was a problem that it was difficult to connect the drive shaft and the end pin. The present invention aims to eliminate the above problems.

[0004]

[Means for Solving Problems] In order to achieve the above object,
The present invention relates to a plotter including a pair of legs arranged parallel to each other at a predetermined interval, and a plotter main body supported on an upper portion of the pair of legs. A roll shaft arranged substantially parallel to the floor and having one end rotatably supported on the inner surface of one of the pair of legs, and the other leg of the pair of legs. In the body, a shaft mounting hole which is opened horizontally on the outer side surface thereof, is concentrically opposed to the open end of the roll shaft, and has a screw portion slightly larger in diameter than the roll paper, A shaft fixing member having a threaded portion that can be screwed into the threaded portion of the shaft mounting hole from the outer surface of the other leg, and an open end side of the roll shaft rotatably supported by the shaft fixing member. A first roll paper holder for holding one end of the roll paper in which a fitting hole for receiving is formed; Serial in which and a second roll paper holding member for holding the other end of the roll paper mounted at one end of the roll shaft.

[0005]

When the roll paper is attached between the legs, the roll paper is automatically inserted into the roll shaft when the roll paper is inserted into the shaft mounting hole from the outer surface of the one leg. After inserting the roll paper into the roll shaft, and screwing the shaft fixing member into the shaft mounting hole of one leg, the open end side of the roll shaft is inserted into the fitting hole of the first roll paper holder and Both ends of the paper are sandwiched and fixed between the first and second roll paper holders.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings. In FIG. 1, reference numeral 24 denotes a main body of a paper drive type plotter, which is supported at a predetermined height from the floor surface by a pair of legs 26 and 28 fixedly provided on both sides of the main body. The plotter body 24 is provided with a drawing mechanism. The pair of legs 26, 28 are composed of plate members facing each other in parallel, and mounting boxes 30, 32 are fixedly provided on inner surfaces of the upper portions of the pair of legs 26, 28 facing each other. There is.

One end 38a of a roll shaft 38, to which a roll paper holder consisting of a boss 36 with a flange 34 is attached, is rotatably supported on the bearing portion of one mounting box 32, and the roll shaft 38 has the bearing portion. It is supported horizontally by the floor. One end 38 of the roll shaft 38
a is connected to a drive shaft built in the attachment box 32, and the drive shaft is attached to the attachment box 3 via a power transmission mechanism.
It is connected to the motor built in 2.

The open end 38b of the roll shaft 38 faces the mounting box 30 with a predetermined space. A shaft mounting hole consisting of a screw hole 40 and a shaft holding hole 42 coaxially communicating with the screw hole 40 is horizontally formed in the leg 26 and the mounting box 30 at a position facing the open end 38b of the roll shaft 38. Has been done.

The flange 34 is integrally formed with a boss 36 having a tapered portion as shown in FIG.
6 is configured to be slidably fitted to the roll shaft 38 and fixed to the roll shaft 38 with a set screw 44 at an arbitrary position. In FIG. 3, reference numeral 46 denotes a shaft fixing member, which is composed of a columnar portion 48 and a tubular portion 50 projecting from one end surface of the columnar portion 48. The outer peripheral surface of the columnar portion 48 has a screw thread corresponding to the screw hole 40. Are formed.

One end of the boss 50 is rotatably fitted to the tubular portion 50 via a ball bearing so as not to be displaced in the axial direction, and a flange 52 is integrally formed at the center of the boss 50. There is. A fitting hole 54 for the roll shaft 38 is formed in one of the bosses 50, and a taper portion is formed on one outer peripheral surface of the boss 50. The boss 50 and the flange 52 form a roll paper holder.

Reference numeral 56 is a slot for a fixture formed on the end surface of the shaft fixing member 46. Next, an operation of attaching the roll paper 56 between the legs 26 and 28 will be described. First, the operator inserts the roll paper 56 from the screw hole 40 opened on the outer side surface of the leg body 26, penetrates the roll shaft 38 through the paper tube of the roll paper 56, and sets the width of the roll paper 56 in advance. One end of the roll paper 56 is opposed to the flange 34 whose position is adjusted accordingly.

Next, when the shaft fixing member 46 is screwed into the threaded portion of the screw hole 40, the roll shaft 38 and the fitting hole 54 are preliminarily aligned with each other, so that the fitting hole 54 is automatically fitted. While the open end 38b side of the roll shaft 38 is inserted into
The tapered portions of the bosses 50 and 36 are press-fitted into the paper tube of the roll paper 56, and the roll paper 56 is attached to the roll shaft 38 by the bosses 50 and 36.
Fixed through.

Although the present embodiment has been described as applied to a paper-driven pen plotter, the present invention can also be used for a leg of a raster plotter such as an inkjet printer or a thermal printer.

[0014]

Since the present invention is configured as described above, it is not necessary to remove the roll shaft from the leg when mounting the roll paper, and the roll paper can be easily mounted.

[Brief description of drawings]

FIG. 1 is an external view of a plotter.

FIG. 2 is a front view of a plotter.

FIG. 3 is a sectional view of a shaft fixing member.

FIG. 4 is a side view of a flanged boss.

FIG. 5 is a front view of a plotter showing a conventional technique.

FIG. 6 is an external view explanatory diagram of a conventional technique.

[Explanation of symbols]

 2 Roll paper 4 Plotter body 6 Leg body 8 Leg body 10 Roll shaft 12 Mounting box 14 Fixing flange 16 End pin 18 Mounting box 20 Mounting hole 22 Drive shaft 24 Plotter body 26 Leg body 28 Leg body 30 Mounting box 32 Mounting box 34 Flange 36 Boss 38 Roll shaft 40 Screw hole 42 Shaft holding hole 44 Screw 46 Shaft fixing member 48 Cylindrical part 50 Boss 52 Flange 54 Fitting hole 56 Roll paper

Claims (1)

[Claims] 1. A plotter comprising a pair of legs arranged parallel to each other at a predetermined interval, and a plotter body supported on the upper part of the pair of legs, wherein the pair of legs are between the pair of legs. A roll shaft that is arranged substantially parallel to the floor and has one end rotatably supported on the inner surface of one of the pair of legs, and the other of the pair of legs. On the legs,
A shaft mounting hole that opens horizontally to the outer surface, is concentrically opposed to the open end of the roll shaft, and has a threaded portion that is slightly larger than the diameter of the roll paper; A shaft fixing member having a threaded portion that can be screwed into the threaded portion of the shaft mounting hole from the outer surface of the leg, and a fitting that rotatably supports the shaft fixing member and receives the open end side of the roll shaft. First for holding one end of the roll paper in which holes are formed
And a second roll paper holder for holding the other end of the roll paper attached to one end of the roll shaft.