JP2596037Y2 - Recorder - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recorder for recording various recording data, such as various measured values such as temperature and humidity, measurement conditions, conditions, etc., on a recording paper by a print head.

[0002]

2. Description of the Related Art In general, in a recorder, a recording paper is attached to a platen roller and travels in a direction orthogonal to the width direction, and a carriage equipped with a print head having a plurality of wire hammers is recorded along a main shaft. The paper is reciprocated in the width direction of the paper, the wire hammer is selectively operated, and printing is performed by pressing the recording paper through an ink ribbon. In such a recorder, when the distance between the recording paper and the print head changes, the surface pressure of the wire hammer on the recording paper changes, so that the density and thickness of the printed characters and the like change. That is, if the distance between the recording paper and the print head is too short, the surface pressure increases, so that the characters and the like become thick and dark, and if too far, the surface pressure decreases, and the surface becomes thin and light. Therefore, the distance between the recording paper and the print head is adjusted to obtain a desired print quality. In this case, if the carriage rattles during sliding, the distance changes and the print quality deteriorates. Therefore, the carriage mounting structure is important for achieving uniform print quality.

FIGS. 4 and 5 are a side sectional view and a perspective view showing a mounting structure of a carriage in a conventional recorder. In this recorder, a carriage 2 is slidably disposed on a main shaft 1 in a width direction of the recording paper 3, that is, in a direction parallel to a recording line, and first and second guide shafts 4 and 5 are provided below the carriage 2. A first stopper 6 screwed to the lower surface of the carriage 2 so as to be adjustable in height is brought into contact with the first guide shaft 4 so as to contact the recording paper 3 and the print head 7. And adjust the gap d between
A second vertically movably disposed on the lower surface of the rear end of the carriage 2
Is pressed against the second guide shaft 5 by a compression coil spring 9. The print head 7 reciprocates in the axial direction of the platen roller 10 along the main shaft 1 integrally with the carriage 2 and stops at an arbitrary position to protrude the wire hammer so that the ink ribbon 1
Printing is performed by pressing the recording paper 3 through the recording paper 1.
The gap d between the recording paper 3 and the print head 7 is adjusted by rotating the first stopper 6 to adjust the amount of protrusion. Since the second stopper 8 is pressed against the second guide shaft 5 by the compression coil spring 9, the carriage 2 is given a clockwise rotation behavior in FIG. Thereby, the first stopper 6 is pressed against the first guide shaft 4. Reference numeral 12 denotes a bearing disposed between the main shaft 1 and the carriage 2.

FIG. 6 is a perspective view showing another conventional example of a carriage mounting structure. This recorder uses the main shaft 1
The carriage 2 is movably held in the axial direction of the platen roller 10 by the guide shaft 4 and one guide shaft 4, and the shaft ends of the guide shaft 4 are centered on the main shaft 1 provided on the pair of left and right side plates 13, 14. The guide shaft 4 is vertically supported along the long hole 15 so as to adjust the gap between the print head 7 and the recording paper.

[0005]

However, in the conventional recorder shown in FIGS. 4 and 5, the parallelism between the three shafts, that is, the main shaft 1 and the first and second guide shafts 4, 5 is determined. However, there is a problem that the assembly work is troublesome. In addition, the first and second guide shafts 4 are located before and after the main shaft 1.
5 needs to be arranged, so that there is also a problem that an installation space becomes large and the apparatus itself becomes large.

On the other hand, in the conventional recorder shown in FIG. 6, no force in any direction acts on the carriage 2 itself, so that the main shaft 1, the guide shaft 4, the bearing 12 and the However, there is a problem that the clearance causes play in the vertical direction of the carriage 2 and lowers the print quality.

Therefore, there is a need for the development of a recorder that eliminates the above-mentioned conventional problems and enables stable printing quality and miniaturization.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object a relatively simple configuration which does not require high dimensional accuracy, and which requires no space between the shaft and the carriage. It is an object of the present invention to provide a recorder that eliminates play and improves the printing quality and downsizes.

[0009]

SUMMARY OF THE INVENTION In order to meet such a demand, a recorder according to the present invention comprises a carriage having a print head for performing a hitting operation and an adjusting screw, and sliding the carriage in the width direction of the recording paper. A main shaft that is freely guided and held, and a guide that is disposed between the main shaft and the platen roller and that is disposed below the carriage to support the adjustment screw and determine a gap between the print head and the recording paper. A shaft, and an elastic member having one end fixed to an end of the carriage on the main shaft side and a free end pressed against a peripheral surface of the guide shaft opposite to the adjustment screw.

[0010]

According to the present invention, the guide shaft supports the adjusting screw of the carriage. The adjusting screw adjusts the gap between the recording paper and the print head. The adjusting screw and the elastic member sandwich the guide shaft to prevent rattling of the carriage.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. 1 to 3 show an embodiment of a recorder according to the present invention. FIG. 1 is an external perspective view, FIG. 2 is a front view, and FIG. 3 is a side sectional view. In the drawings, components that are the same as or correspond to those in FIGS. 4 to 6 described above are given the same reference numerals, and descriptions thereof are omitted.

In these figures, in the present embodiment, one guide shaft 4 is disposed between the main shaft 1 and the platen roller 10 in parallel with them and below the carriage 2, and this guide shaft 4 is provided. A pair of bearings 20 and 21 are provided on the shaft 4 corresponding to the carriage 2, and the lower end of the adjustment screw 23 screwed into a screw hole 22 formed in the front end of the carriage 2 through the upper and lower surfaces thereof to project below the carriage. A free end extending forward of a leaf spring 24, which is in contact with the upper surface of one bearing 20 and has one end fixed to the rear end of the lower surface of the carriage 2, is pressed against the lower surface of the other bearing 21. It is composed. Therefore, the adjusting screw 23 and the leaf spring 24 hold the guide shaft 4 from above and below via the pair of bearings 20 and 21. In this case, the adjusting screw 23
The carriage 2 has a rotating behavior in the clockwise direction in FIG. 3 around the main shaft 1 by its own weight, so that one bearing 20 is pressed from above, and the upper inner peripheral surface of the inner race is placed on the upper surface of the guide shaft 4. Crimp. On the other hand, the leaf spring 24 presses the lower inner peripheral surface of the inner race against the lower surface of the guide shaft 4 by pressing the other bearing 21 from below. When the adjusting screw 23 is rotated to change the downward projection size, the carriage 2 moves up and down, so that the gap d between the recording paper 3 and the print head 7 can be easily adjusted.

Thus, in such a configuration, the guide shaft 4 is fixed to the pair of bearings 2 by the adjusting screw 23 and the leaf spring 24.
Since the carriage 2 is sandwiched from above and below through 0 and 21, high dimensional accuracy is not required for the carriage 2, and it is possible to reliably prevent the carriage 2 from rattling in the up and down direction. As a result, the gap d between the recording paper 3 and the print head 7 can be kept constant, and the print quality can be improved. Also, one guide shaft 4 is connected to the main shaft 1
And the platen roller 10, it is possible to reduce the size of the apparatus without requiring a large space.

In the above embodiment, a pair of bearings 20, 21
Is fitted on the guide shaft 4 and the adjusting screw 23 and the leaf spring 24 are pressed against the guide shaft 4 via these components. However, the present invention is not necessarily limited to this, and If the bearing can be smoothly slid along the guide shaft 4, the bearings 20, 21
The adjustment screw 23 and the leaf spring 24 may be directly pressed into contact with the guide shaft 4 without the necessity. In the above embodiment, the leaf spring 24 is used as the elastic member, but a wire spring or the like may be used.

[0015]

As described above, according to the recorder of the present invention, since the guide shaft is sandwiched between the adjusting screw provided on the carriage and the elastic member, the carriage has a loose play despite its simple structure. As a result, the printing quality can be improved. Further, the dimensional accuracy of the carriage and the like is not required, and a single guide shaft does not require a large installation space, so that the size of the apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a recorder according to the present invention.

FIG. 2 is a front view.

FIG. 3 is a side sectional view.

FIG. 4 is a side sectional view showing a mounting structure of a carriage in a conventional recorder.

FIG. 5 is a perspective view of the recorder.

FIG. 6 is a perspective view showing a mounting structure of a carriage in another conventional recorder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main shaft 2 Carriage 3 Recording paper 4 Guide shaft 5 Guide shaft 7 Print head 10 Platen roller 11 Ink ribbon 20 Bearing 21 Bearing 23 Adjustment screw 24 Leaf spring

Claims (1)

(57) [Scope of request for utility model registration] A carriage having a print head for performing a hitting operation and an adjusting screw; a main shaft for guiding and holding the carriage so as to be slidable in the width direction of the recording paper; and a position between the main shaft and a platen roller. A guide shaft disposed below the carriage to support the adjusting screw and defining a gap between the print head and the recording paper; one end fixed to a main shaft side end of the carriage, a free end And an elastic member pressed against the peripheral surface of the guide shaft opposite to the adjustment screw.