JPS6141566A - Continuous paper feed tractor - Google Patents

Abstract

PURPOSE:To enable the normal supply and discharge of continuous paper by preventing the detachment of the continuous paper, by making the radius of curvature of the driving rotor or guide member arranged to the side of a platen larger than that of the guide member or driving rotor provided in the post stage thereof. CONSTITUTION:The radius of curvature r1 of the driving rotor 9C in the side of a platen 4 is larger than the radius of curvature r2 of a guide membaer 9D and continuous paper 7 is prevented from contacting and engaging with guide plates 10A, 10B between a tractor and the platen 4. The driving rotor 9C slide with a drive shaft 5B allows an endless belt 8 having the projections 8A engaging with the feed perforations 7A of the continuous paper 7 to rotate to a predetermined direction. By this rotation, the continuous paper 7 in the side of the guide plate 10A is discharged while the continuous paper 7 in the side of the guide plate 10B is supplied. Because the continuous paper 7 is supplied and discharged almost straightly in supply and discharge routes, the continuous paper 7 can be prevented from being detached from the tractor 6.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding mechanism, and in particular to a technique that is effective when applied to a continuous paper feeding tractor for a feeder mounted on a serial printer device.

BACKGROUND ART FIG. 6 is a schematic configuration diagram when a page feeder is mounted on a conventional printer device, and FIG. 7 is a continuous paper feed tractor (hereinafter referred to as a tractor) taken along the cutting line ``--'' in FIG. 6. FIG. 2 is a schematic cross-sectional view showing the configuration of FIG.

In FIGS. 6 and 7, 1 is a front cover, 2 is a top cover, 3 is a soundproof cover, 4 is a platen, 5 is a page feeder, and 6 is a tractor. The tractor 6 is attached by a drive shaft 5B and a support shaft 5G connected to the platen 4 via a transmission mechanism (not shown) built into the side frame 5A of the page feeder 5. The tractor 6 is linked to the driving force of the platen 4 and is used to supply and discharge continuous sheets 7 such as continuous forms to and from the platen 4.

The tractor 6 mainly includes an endless belt 8 provided with protrusions 8A at a predetermined pitch that engage with feed holes of the continuous paper 7, a driving rotating body (sprocket) 9A, and a guide member 9.
B. Continuous paper-1 Part consists of a guide plate IOA and a continuous paper lower guide plate IOB. The driving rotary body 9A and the guide member 9B have substantially the same radius of curvature and are formed smaller than the platen 4 in order to make the tractor 6 compact.

In such a serial printer device in which the page feeder 5 is provided with a tractor 6, the continuous paper 7 is set on the platen 4 and the tractor 6 before the printing operation, and then the continuous paper 7 is fed and discharged by the tractor 6. The printing operation is thereby performed.

In such a supply and discharge path, the continuous paper 7 becomes non-linear, and the continuous paper 7 tends to get caught on the guide plates 10A and 10B. For this reason, the balance of tension is lost at both ends of the continuous paper 7, causing a skew on the tension side, and the continuous paper 7 comes off from the tractor 6.

Therefore, a continuous paper guide member 11 is provided in the supply or discharge path of the continuous paper 7 between the tractor 6 and the platen 4.
Contact between the guide plate 10A, IOB and the continuous paper 7 is eliminated to prevent jamming.

However, since the platen 4 and the continuous paper guide member 11 cannot be attached parallel to each other, the balance of tension at both ends of the continuous paper 7 is lost at the continuous paper guide member 11, as described above, and the tension is on the tight side. This causes a skew in the continuous paper 7, causing the continuous paper 7 to be dislodged from the tractor 6.

For this reason, there was a problem in that the continuous paper 7 could not be normally fed and discharged by the tractor 6.

OBJECTS OF THE INVENTION 1. An object of the present invention is to prevent continuous paper from slipping off in a feeder continuous paper feeding tractor mounted on a printer device, and to properly feed continuous paper.

The objective is to provide technology that enables waste and discharge.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

Hereinafter, the configuration of the present invention will be explained along with examples.

1 to 3 are diagrams for explaining one embodiment of the present invention, in which FIG. 1 is a schematic cross-sectional view showing the configuration of a tractor, and FIG. 2 is a diagram showing the configuration of the tractor. The schematic plan view, FIG. 3, is a diffuse exploded view of the tractor.

In all of the embodiments, parts having the same functions as those in FIGS. 6 and 7 are designated by the same reference numerals, and repeated explanations thereof will be omitted.

In FIGS. 1 and 3, 9C is a driving rotating body, which is provided so as to slide on the driving shaft 5B. The driving rotary body 9C is for rotating the endless belt 8 having a protrusion 8A made of a hard material that engages with the feed hole 7A of the continuous paper 7 in a predetermined direction. The outer periphery of the drive rotary body 9C is provided with teeth cut at a predetermined pitch so as to mesh with the teeth provided on the endless belt 8, and prevent the slippage of the teeth and drive the rotating body 9C. Force is transmitted accurately.

9D is a guide member having a circular part and a tapered part;
=4- It is attached to a support member described later by integration or adhesive means such as adhesive. This guide member 9D is for guiding the endless belt 8 rotated by the driving rotary body 9C.

The endless belt 8 is provided so as to be wound around the drive rotating body 9C and the guide member 9D.

The radius of curvature r1 of the drive rotating body 9C disposed on the platen 4 side is larger than the radius of curvature r2 of the guide member 9D. This allows the continuous paper 7 to be fed and discharged linearly in the supply and discharge path between the tractor 6 and the platen 4, and the continuous paper sheet comes into contact with the guide plate 10A%IOB, and the This is to prevent binding.

10a and 10b are elongated holes, and guide plates IOA and IO
It is provided at a predetermined part of B. These long hole parts 10a, 10
b, the protrusion 8A protrudes beyond the contact surface between the guide plate 10A, IOB and the continuous paper 7, and the protrusion 8A and the feed hole 7A
This is to ensure engagement with the

12A and 12B are supporting members. A guide member 9D is attached to the support member 12A.

A guide plate 10A and an IOB are rotatably attached to the support member 12B at connecting nodes.

The rotating shaft of the driving rotary body 9C is the supporting member 12A.
, 12B are rotatably attached through holes provided in each of them.

Reference numeral 13 denotes an elastic member, one end of which is attached to a predetermined portion of the guide plate 10A, and the other end portion of which is attached to a predetermined portion of the guide plate IOB. This elastic member 13
This is for controlling the opening and closing operations of 0A and IOB.

14A and 14B are fixing holes, which are provided at predetermined portions of the support member 12A and the guide member 9D.

The fixing holes 14A and 14B are formed by elastic fixing protrusions (not shown) provided on the support member 12B.
This is for removably fixing the supporting member 12A and the supporting member 12B.

Reference numeral 15A denotes a variable sleeve, which is provided at an intervening portion between the respective holes of the guide member 9D, support members 12A and 12B, and the support shaft 5C. The variable sleeve 15A can have a variable hole diameter and is used to freely fix the tractor 6 at a predetermined portion of the support shaft 5C.

15B is a tightening member having a lever portion, and is attached to the variable sleeve 15A. The tightening member 15B is used to tighten or release the variable sleeve 15A against its elastic force to vary the hole diameter and fix the tractor 6 to a predetermined portion of the support shaft 5C.

Next, the operation of the tractor of this embodiment will be briefly explained using FIGS. 1 to 3.

First, the guide plates 10A and IOB of the tractor 6 are opened against the elastic force of the elastic member 13. Then, after engaging the feed hole 7A of the continuous paper 7 and the protrusion 8A and further winding the continuous paper 7 around the platen 3, the opened guide plate 1
0A, close IOB.

As a result, the continuous paper 7 is set.

After this, the platen 4 is rotated clockwise.

This rotation of the platen 4 causes the endless belt 8 to rotate via the drive pole 5B and the drive rotating body 9C.

By this rotation of the endless belt 8, the continuous paper 7 on the guide plate 10A side is discharged, and the continuous paper 7 on the guide plate 10B side is fed. In the supply and discharge paths, the continuous paper 7 is supplied and discharged substantially linearly, so that there is no contact with the guide plates 10A and 10B.

As explained above, according to this embodiment, the continuous paper 7 becomes substantially linear in the supply and discharge paths by configuring the driving rotary body 9C and the guide member 9D with a predetermined radius of curvature. The tension balance at both ends will not be lost due to contact with the guide plate 10A, IOB, etc.

Thereby, the continuous paper 7 can be prevented from coming off the tractor 6, and the continuous paper 7 can be normally supplied and discharged.

In the fifth embodiment, an example in which the guide member 9D is made of a plate member having a predetermined shape has been described, but it may be made of a rotatable driven rotating body.

Further, in this embodiment, an example has been described in which the driving rotary body 9C is arranged on the planar 4 side, but the guide member 9D may be arranged on the platen 4 side. In this case, it is necessary to configure the guide member 9D to have a larger radius of curvature than the driving rotary body 9C.

Further, in this embodiment, an example in which a drive rotary body 9C having teeth on its outer circumferential portion is used has been described, but a rotary body without teeth that contacts the endless belt 8 with a moderate frictional force may be used.

Furthermore, the guide plate 10A, IOB and support member 12A
The shape of %12B may be variously modified depending on the configuration of the supply and discharge mechanism that supplies and discharges the continuous paper 7 to the tractor 6.

Next, other embodiments of the present invention will be described.

4 and 5 are schematic sectional views of a tractor for explaining another embodiment of the present invention.

The tractor 6 shown in FIGS. 4 and 5 has a driving rotating body 9
C and the radius of curvature of the guide member 9D are controlled so that the continuous paper 7 on at least one of the supply and discharge paths is wedged into the driving rotary body 9C (in the direction of arrows 7a and 7b).

As explained above, according to the present embodiment, by configuring the driving rotary body 9C and the guide member 9D with a predetermined radius of curvature, the continuous paper 7 can be Since the rotating body 9C is embedded in the continuous paper 7, the balance of tension at both ends will not be lost due to contact with the guide +i"OA, 10B, etc. This prevents the continuous paper 7 from coming off from the tractor 6. Therefore, the continuous paper 7 can be normally fed and discharged.

In addition, the rotating shaft of the platen, the driving shaft 5 of the driving rotary body 9C
B and the support shaft 5C of the guide member 9n do not need to be placed exactly in a straight line, and the processing accuracy can be relaxed, making it easy to manufacture the L-tractor 6, the serial printer device, and the page feeder 5. .

As explained above, according to the novel technical means disclosed by the present application, the following effects can be obtained.

(1) By configuring the rotating body for driving the tractor and the guide member to have different predetermined radii of curvature, it is possible to make the continuous paper flow approximately straight in the supply and discharge paths or to be inserted into the tractor. It is possible to prevent the tension from being unbalanced at both ends of the continuous paper due to contact with a member or the like.

(2) According to (1) above, it is possible to prevent the continuous paper from coming off the tractor, so that the continuous paper can be normally fed and discharged.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

For example, it goes without saying that the present invention can be applied to feeders other than page feeders.

[Brief explanation of drawings]

1 to 3 are diagrams for explaining one embodiment of the present invention. FIG. 1 is a schematic cross-sectional view showing the configuration of a tractor, and FIG. 2 is a configuration of a rough FIG. 3 is a diffused exploded view of the tractor. FIGS. 4 and 5 are schematic plan views showing the configuration of a No. 1 rotor for explaining other embodiments of the present invention. FIG. 6 is a schematic diagram showing the configuration of a page feeder mounted on a conventional printer device. FIG. 7 is a schematic diagram showing the configuration of a tractor along the section line FIG. In the figure, 1...Cover to front 1, 2...Top cover, 3...Soundproof cover, 4...Platen, 5...Page feeder, 5A...Sight frame, 5B... Drive shaft , 5C... Support shaft, 6... Tractor, 7...
Continuous paper, 7A... Spread hole, 8... Endless belt, 8
A...Protrusion, 9C...Rotating body for driving, 9D...
Guide member, IOA, 10B... guide plate, 10a,
, 10b... Long hole portion, 12A, 12B... Supporting member, 1゛3... Elastic member, 14A, 14B... Fixing hole, 15A... Variable sleeve, 15B... Tightening member It is. -12= Fig. 4 Fig. 6 Tegu to Tsui Isho (self-published) December 11, 1980

Claims (1)

[Claims] (1) In a feeder continuous paper feed tractor mounted on a printer device that supplies and discharges continuous paper, an endless belt that supplies and discharges continuous paper is wound around a driving rotor and a guide member, A continuous paper feed tractor, characterized in that the radius of curvature of the driving rotor or guide member disposed on the platen side of the printer device is larger than the radius of curvature of the guide member or the drive rotor disposed in the subsequent stage.