JPH0512441U - Tractor member spacing setting adjustment mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] A tractor member spacing setting mechanism capable of preventing excessive tension of continuous paper when the tractor member is moved and adjusted corresponding to continuous paper. [Structure] A push-up arm 13 is fixed to a swing shaft 12 that supports a tractor belt unit 20.
2 is rotated by the interlocking mechanism 30 in conjunction with the upper cover 1B, and when the upper cover 1B is opened, the push-up arm 13 pushes up the fan hold paper 2 attached to the tractor belt units 20, 20 by a predetermined amount, Top cover 1
When B is closed, the push-up of the fan hold paper 2 is released.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, the tractor member having the engaging projections that engage with the feed holes formed at the both ends of the continuous paper should be continuous in parallel with the conveying direction of the continuous paper and corresponding to continuous paper having different widths. The present invention relates to a tractor belt interval setting adjustment mechanism for adjusting the interval between tractor belts in accordance with continuous paper in a tractor structure that is movable and adjustable in the width direction of the paper.

[0002]

[Prior Art]

 Conventionally, output from a computer or the like is recorded on recording paper to obtain a hard copy.In a printer, feed holes are formed at predetermined intervals at both ends of so-called fan-hold paper as recording paper, and the folded portion is formed. There is a type that uses folding continuous paper with feed holes (hereinafter simply referred to as continuous paper) that is perforated and is easily cuttable. In such a printer that prints on continuous paper, an endless belt (a tractor belt or a pulley) having engaging protrusions that engage with feed holes formed at both ends of the continuous paper when driving the continuous paper may also be used. ) Is often configured to be performed by a tractor. The tractor is a tractor belt (or pulley) in which endless belts having engaging protrusions that engage with feed holes formed at both ends of the continuous paper are linked between pulleys so as to be capable of rotating and are fed to both ends of the continuous paper. The tractor belts (or pulleys) are usually arranged in the width direction of the continuous paper so that they correspond to the holes and are arranged in parallel with the continuous paper transport direction. Is provided as.

[0003]

[Problems to be solved by the device]

 By the way, in the tractor structure in which the tractor members such as the tractor belt and the pulley can be moved and adjusted in the width direction of the continuous paper as described above, the position of the tractor member (the distance between the left and right tractor belts in the continuous paper width direction) is set to the continuous paper. When adjusting the movement correspondingly, there is a strong tendency to set the position of the tractor member so that the continuous paper is stretched in the width direction, and as a result, the continuous paper is fed by the engagement protrusion of the tractor member during continuous paper conveyance. There were problems such as damage to the holes and an increase in the continuous paper transport load.

[0004]

[The purpose of the device]

 SUMMARY OF THE INVENTION In view of the above circumstances, the present invention aims to provide a tractor member interval setting adjustment mechanism capable of preventing continuous tension of the continuous paper when the tractor member is moved and adjusted in correspondence with the continuous paper. And

[0005]

[Means for solving the problem]

 In order to achieve the above object, the interval setting adjusting mechanism of the tractor member according to the present invention has a tractor member having engaging projections which engage with feed holes formed at both ends of the continuous paper, and is parallel to the conveying direction of the continuous paper. In addition, in the tractor structure that is arranged so that it can be moved and adjusted in the width direction of the continuous paper to accommodate continuous papers of different widths, the engaging projections of the respective tractor members are provided in the feed holes at both ends of the tractor structure. The recording paper slack member is configured to be movable between a position where the continuous paper area is engaged with the continuous paper area by a predetermined amount to bend the continuous paper area and a retracted position where it does not interfere with the continuous paper area. With this configuration, the position of the tractor member is set so that the continuous paper is stretched in the width direction with the recording paper slackening member protruding by a predetermined amount in the continuous paper area, and then the recording paper slackening member is retracted to the retracted position. By setting the above, it is possible to prevent the continuous paper from being overtensioned and to obtain an appropriate tension.

[0006]

[Example of device]

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of a tractor to which an embodiment of an interval setting adjusting mechanism for a tractor member according to the present invention is applied, FIG. 2 is a view corresponding to an AA cross section of FIG. 1, and FIG. 3 is a B of FIG. -B is a sectional view. In the illustrated tractor, the two support shafts (the drive shaft 11 and the swing shaft 12) are separated from each other by a predetermined distance in the transport direction of the fan-hold paper 2 which is continuous paper, and the direction orthogonal to the transport direction of the fan-hold paper 2 Is rotatably provided on a chassis (not shown) of the printer 1, and a pair of left and right tractor belt units 20, 20 are supported on the support shafts 11, 12 so as to be slidable in the extending direction of the support shafts 11, 12. It has been configured.

The tractor belt unit 20 integrally connects pulleys (driving-side pulley 21 and driven-side pulley 22) mounted on the drive shaft 11 and the swing shaft 12 by a case 23 (not shown in FIG. 2). At the same time, an endless belt 24 having engaging protrusions 24A ... Engaging with the feed holes 2A formed at both ends of the fan hold paper 2 is linked between the pulleys 21 and 22. A holding lid 25, which has a slit 25A through which the engaging projection 24A of the endless belt can pass, is pivotally attached to the upper end of the outer side plate of the case 23 so as to swing and open. Acts to prevent the fan-hold paper 2 from rising from the endless belt 24 and disengaging the feed holes 2A ... From the engaging projections 24A. The drive shaft 11 has a square cross-sectional shape, the drive-side pulley 21 is mounted so as to be relatively non-rotatable and slidable in the axial direction, while the swing shaft 12 has a circular cross-sectional shape. The driven pulley 22 is mounted so as to be relatively rotatable and slidable in the axial direction.

In the tractor configured as described above, when the drive shaft 11 is rotationally driven via the gear 15, the endless belt 24 of the tractor belt unit 20 is orbitally driven via the drive side pulley 21. The feed holes 2A ... Drive the fan hold paper 2 which is engaged with the engaging protrusions 24A ... of the endless belt 24. The fan hold paper 2 is attached by opening the holding lids 25 of the left and right tractor belt units 20 and 20, and when the fan hold paper 2 having different widths is used, the tractor belt units 20 and 20 are newly installed. The feed holes 2A at the side ends of the hold paper 2 are slid and moved to the corresponding positions, and the feed protrusions 2A at the side ends of the fan hold paper 2 are engaged with the engaging protrusions 24A of the endless belt 24.

Here, the swinging shaft 12 has a push-up arm 13 as a recording paper loosening member fixed at substantially the center in the longitudinal direction, and an operation lever 15 fixed at one shaft end. By swinging the operating lever 15, the swing shaft 12 is swung, and the pushing arm 13 is swung. An interlocking mechanism 30 with the cover 1B of the printer 1 including the tractor is provided above the operation lever 15.

In the interlocking mechanism 30, as shown in a partially enlarged perspective view of FIG. 4, the operation bar 33 is vertically moved by two upper and lower support protrusions 31 and 32 protruding from the inner surface of the casing of the printer body 1A. The spring 35 is slidably supported by the operation bar 33 and is externally fitted to the operation bar 33 between the E-ring 34 mounted between the support projections 31 and 32 of the operation bar 33 and the lower support projection 32. Is interposed and is biased upward by the restoring force of the spring 35. The upper end of the operation bar 33 projects upward from the upper surface of the side plate of the printer body 1A due to the restoring force of the spring 35, and when the upper cover 1B of the printer 1 is closed, the upper end of the operation bar 33 is the pressing operation portion 1C of the upper cover 1B. The operation lever 15 is pressed by and is moved downward against the return force of the spring 35, and the lower end thereof abuts the upper surface of the operation lever 15 to swing the operation lever 15. The push-up arm 13 is fixed to the swing shaft 12 such that the push-up arm 13 cannot rotate relative to the swing shaft 12, and both ends of the spiral spring 14 externally inserted to the swing shaft 12 have the lower surface of the push-up arm 13 and the casing of the main body 1A of the printer 1. It is in contact with the top surface 1D of the bottom plate of the body, and is urged by the urging force of the spiral spring 14 in such a manner that its tip end is in the upward direction.

With the above-described configuration, when the upper cover 1B of the printer 1 is opened as shown in FIG. 1, the operation bar 33 is released from the pressing force of the upper cover 1B, so that the E-ring 34 is located on the upper side. The push-up arm 13 moves upward until it comes into contact with the lower surface of the support projection 31, and swings until the upper surface of the operation lever 15 comes into contact with the lower end of the operation bar 33 with its tip end facing upward due to the biasing force of the spiral spring 14 ( That is, the swing shaft 12 rotates), and at this time, the upper surface of the push-up arm 13 is projected by a predetermined amount above the plane connecting the upper surfaces of the endless belts 24 of the left and right tractor belt units 20, 20. There is. On the other hand, when the cover 1B of the printer 1 is closed, the upper end of the operation bar 33 is pressed by the pressing operation portion 1C of the upper cover 1B to move downward against the restoring force of the spring, and the lower end thereof is operated. The operation lever 15 is oscillated by being brought into contact with the upper surface of the operation lever 15, and the oscillating shaft 12 is rotated so that the upper surface of the push-up arm 13 has the endless belts 24 of the left and right tractor belt units 20, 20. , 24 located below the plane connecting the upper surfaces of the upper and the lower surfaces (shown by phantom lines in FIGS. 2 and 3).

When the upper cover 1B is opened and the fan hold paper 2 is mounted on the tractor, the push-up arm 13 connects the upper surfaces of the endless belts 24, 24 of the left and right tractor belt units 20, 20. Since the fan hold paper 2 is projected upward, the positions of the left and right tractor belt units 20, 20 are adjusted in a state where the fan hold paper 2 has a mountain shape as shown in FIG. The side feed holes 2A ... Are engaged and mounted on the tractor. Then, when the upper cover 1B is closed, the push-up arm 13 is retracted below the plane connecting the upper surfaces of the endless belts 24 of the left and right tractor belt units 20, 20. Is relaxed. In other words, the amount of protrusion of the push-up arm 13 when the fan-hold paper 2 is attached is set so that when the push-up arm 13 is pulled out and attached, the tension is just appropriate when the push-up arm 13 is retracted. By doing so, in the tractor operating state in which the upper cover 1B is closed, the fan hold paper 2 has an appropriate tension in its width direction, the feed holes 2A of the fan hold paper 2 are damaged, and the load on the tractor increases. Is prevented.

[0013]

[Effect of the device]

 As described above, according to the tractor member interval setting mechanism according to the present invention, the interval between the tractor members is set so that the recording paper slackening member projects into the continuous paper area by a predetermined amount and the continuous paper is bent to form the continuous paper. The tension of the tractor members can be set so that the tension of the recording paper is set to an appropriate tension by setting the tension of the recording paper to the retracted position during actual operation, preventing excessive tension of continuous paper. Therefore, it is possible to prevent the continuous paper feed hole from being damaged by the engagement protrusion of the tractor member and the continuous paper conveyance load from increasing.

[Brief description of drawings]

FIG. 1 is a perspective view of a tractor to which an embodiment of an interval setting adjusting mechanism for a tractor member according to the present invention is applied.

FIG. 2 is a view corresponding to an AA cross section in FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a partially enlarged perspective view of an interlocking mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Printer 1B ... Top cover (cover member) 2 ... Fan hold paper (continuous paper) 2A ... Feed hole 13 ... Push-up arm (recording paper loosening member) 24 ... Endless belt (tractor member) 24A ... Engagement protrusion 30 ... Interlocking movement mechanism

Claims (2)

[Scope of utility model registration request] 1. A tractor member having engaging projections that engage with feed holes formed at both ends of a continuous paper so as to correspond to a continuous paper having a different width in parallel with a conveying direction of the continuous paper. In the tractor structure which is arranged so as to be movable and adjustable in the width direction of the continuous paper, a predetermined amount is projected into the continuous paper area in which the engaging projections of the respective tractor members are engaged with the feed holes at both ends thereof. And a retracting position that does not interfere with the continuous paper area, and is provided with a recording paper loosening member that is movable to the continuous paper area. 2. A cover member for covering an upper area of the tractor, wherein the cover member is opened to mount the continuous paper on the tractor, wherein the recording paper loosening member is the cover. In conjunction with the operation of the members,
The tractor member spacing setting mechanism according to claim 1, wherein the cover member is configured to project into a continuous paper area when the cover member is opened, and retracted when the cover member is closed.