JPH0516495Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a multi-pen recorder in which a plurality of recording pens are arranged at regular intervals along the recording paper feeding direction.

(Prior Art) One type of multi-pen recorder is one in which a plurality of recording pens are kept at constant angular intervals along the circumferential surface of a platen roller, as described in, for example, Japanese Utility Model Publication No. 57-41693. Some are arranged radially.

That is, in the multi-pen recorder described in this publication, a recording pen is detachably attached to one end of a pen support member, and the other end of the pen support member is attached to a carriage. Each carriage is movably fitted on guide shafts that are arranged at constant angular intervals so as to be located on the same circumference around the rotation axis of the platen roller.

With this configuration, each recording pen system can be configured with parts having the same shape.

(Problem to be solved by the invention) However, according to such a conventional configuration, the guide shafts to which each carriage is fitted are located on the same circumference around the rotation axis of the platen roller. Since the carriages are arranged at constant angular intervals, the motor for moving the carriages in the reciprocating direction must also be arranged according to the arrangement of the carriages, which limits the degree of freedom in arranging the parts of the entire device. The drawback is that it is difficult to downsize.

The present invention has focused on these problems, and its purpose is to provide a multi-pen recorder that can use common components and downsize the entire device.

(Means for Solving the Problems) The present invention to solve the above problems consists of a platen roller around which recording paper is wound, a first guide shaft and a second guide shaft arranged parallel to each other. The first guide shaft is located at a position that is not located on the circumference around the rotation axis of the platen roller, and the second guide shaft is located at a position that is not located on the circumference around the rotation axis of the platen roller. a plurality of pairs of guide shafts arranged at equal angular intervals so as to be located at the same angle; a carriage of the same shape movably fitted in the first guide shaft of each pair of guide shafts; a pen holder of the same shape that is movably fitted to the second guide shaft; a connecting member that connects the pen holder to the carriage fitted to each guide shaft of each guide shaft pair; and a connecting member that is detachably attached to each pen holder. It is characterized by being composed of a recording pen of the same shape, and.

(Example) Hereinafter, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a configuration explanatory diagram showing one embodiment of the recording pen mechanism used in the present invention, and shows one system. In Fig. 1, 1 indicates a first
The guide shaft 2 is a second guide shaft made of a non-circular member with a gourd-shaped cross section in which a large diameter portion and a small diameter portion are connected. A carriage 3 is mounted on the first guide shaft 1.
is movably fitted to the second guide shaft 2, and a pen holder 4 is movably fitted to the second guide shaft 2. Note that the second guide shaft 2 is selectively driven to rotate in the reciprocating direction by a rotation mechanism (not shown). Reference numeral 5 denotes a timing belt for moving the carriage 3 along the first guide shaft 1, and is driven reciprocally by a servo motor such as a stepping motor or a DC servo motor (not shown). 6 is a connecting member that connects the carriage 3 and the pen holder 4. 7 is a recording pen that is detachably attached to the pen holder 4.

In the pen holder 4, an insertion hole 22 for loosely fitting the guide shaft 2 is formed on both sides. An opening 8 for attaching the end of the recording pen 7 is formed in a part of the plane, and a latch shaft 9 is attached to the opening 8 parallel to the guide shaft 2. Incidentally, taper flanges for regulating the attachment position of the recording pen 7 are integrated with both ends of the latch shaft 9, and are supported by pivot bearings so as to rotate slightly. Further, a notch 10 into which a portion of the recording pen 7 is fitted is formed in a portion of the plane.

2 is a front view of the recording pen 7, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a partial sectional view taken along line A--A in FIG. 2. As shown in these figures, the recording pen 7 includes an ink case 12 that is formed in a flat shape and has one end curved, and in which an ink-impregnated batting 11 is housed, and a curved end portion of the ink case 12. A pen tip 13 attached to the pen holder 4 so as to communicate with the inside thereof, and an opening 8 of the pen holder 4.
A mounting part 14 is integrated into the other end of the ink case 12 so as to fit into the ink case 12, and a mounting part 14 is rotatably attached to a part of the surface of the mounting part 14 via a shaft 15, and one end is a part of the pen holder 4. The other end is a pen pressure spring 16 so as to press the notch 10 formed in the
a pen pressure generating plate 17 energized by the pen holder 4; an engaging portion 18 formed on the back surface of the mounting portion 14 so as to be detachably and rotatably fitted to the latch shaft 9 attached to the pen holder 4; 4, and a positioning member 19 formed on the back surface of the mounting portion 14 so as to face the bottom surface of the guide shaft 2 when attached to the guide shaft 2.

In such a configuration, when attaching the recording pen 7 to the pen holder 4, it is necessary to attach the recording pen 7 to the pen holder 4.
After fitting the mounting part 14 into the opening 8 of the pen holder 4 and inserting the positioning member 19 formed on the back surface of the mounting part 14 so as to face the lower surface of the guide shaft 2, the engaging part 18 is inserted into the latch shaft. Fit into 9.

FIG. 5 is an explanatory diagram of the operation when the recording pen 7 is attached to the pen holder 4, where the solid line indicates the recordable state in which the recording pen 7 is down, and the two-dot chain line indicates the recording state in which the recording pen 7 is up. Indicates a prohibited state. In FIG. 5, 20 is a platen roller, and 21 is a recording paper wound around a part of the platen roller 20. In FIG.

In the recordable state, the positioning member 19 is mechanically free with respect to the guide shaft 2. The recording pen 7 is rotated about the latch shaft 9 by its own weight and the pen pressure generated between the notch 10 of the pen holder 4 and the pen pressure generating plate 17 biased by the pen pressure spring 16. When the pen tip 13 is rotated and pressed toward the side, the pen tip 13 enters a pen-down state in which it stably contacts the recording paper 21 on the platen roller 20 with a constant pressing force. In the recording prohibited state, guide shaft 2
is rotated in the direction of arrow A, and the end of the positioning member 19 is pressed by the small diameter portion of the guide shaft 2. Recording pen 7
is rotated clockwise around the latch shaft 9 against its own weight and the pressing force against the platen roller 20 due to pen pressure. As a result, the pen tip 13 is placed in a pen-up state away from the recording paper 21.

In the above embodiment, the guide shaft 2 has a gourd-shaped cross section, but the guide shaft 2 may have a substantially non-circular cross-sectional shape, and is not limited to the gourd shape.

FIG. 6 is a structural explanatory diagram showing one embodiment of the present invention, and shows an example in which an eight-pen type multi-pen recorder is constructed using eight recording pen mechanisms shown in FIG. 1. In FIG. 6, 23 is the timing belt 2
4 through sprocket wheels 25 and 26
This is a platen rotation drive mechanism that rotates the platen. 2
7 is a first storage section for storing unrecorded recording paper; 28;
2 is a second storage section for storing recorded recording paper, and this is integrated as a chart cassette with a recording paper feeding mechanism including sprocket wheels 25, 26 and the like. The thus integrated chart cassette is supported between side plates (not shown) so that it can be taken out while rotating about point _P1 . A wire dot head 29 performs digital printing, and is arranged so as to be movable between the recordable ranges of the recording paper 21 in parallel with the platen. 30 is a spacer having a flat surface disposed between the sprocket wheels 25 and 26, and 31 is a recording paper pressing member, which is attached to the chart cassette.

The second guide shafts 2 of each recording pen mechanism are arranged at equal angular intervals so as to be located on the circumference centered on the rotation axis P ₂ of the platen roller 20, and the first guide shaft 1 of each recording pen mechanism It is arranged at an appropriate position that is not located on the circumference around the rotation axis of the platen roller 20 in consideration of the storage space for a servo motor (not shown) for driving the pen mechanism.

With this configuration, all of the parts constituting each recording pen except for the connecting member 6 can be made to have the same shape to provide compatibility. By changing only the shape of the connecting member 6, the first guide shaft 1 can be placed at any position that is not located on the circumference around the rotation axis of the platen roller 20, and each recording pen mechanism A servo motor (not shown) for driving can be arranged at an optimum position for downsizing the entire device.

FIG. 7 is a configuration explanatory diagram showing an embodiment of the pen up-down mechanism in such a multi-pen recorder, and only one pen system is shown. In FIG. 7, a cam 32 is formed into a fan shape and is rotatably mounted coaxially with the rotation axis P ₂ of the platen roller 20. As shown in FIG. On the outer periphery of this cam 32, a plurality of notches 33 and a protrusion 34 having a height h and having one surface tapered are formed at equal intervals so as to correspond to the arrangement position of the second guide shaft 2. . A protrusion 35 for manual operation is integrated into one end of the cam 32. A first opening 36 provided with a threaded groove and a second opening 37 for regulating the rotational position are formed on the side surface of the cam 32. A gear 38 meshes with a threaded groove provided in the first opening 36, and is driven to rotate in a reciprocating direction by a stepping motor 39. 40 is a stopper pin fitted into the second opening 37. 41 is a lever whose one end is fixed to the end of the second guide shaft 2, and the other end is formed in an arc shape and fits into the groove 33 of the cam 32.
It is fitted in.

In such a configuration, in the recordable state, the end of the lever 41 is located in the groove 33 of the cam 32, and the second guide shaft 2 is rotated in the direction of arrow B, and the recording pen 7 is positioned. Member 19 is the fifth
It is mechanically free with respect to the guide shaft 2, similar to the state shown by the solid line in the figure. That is, the recording pen 7 is in a pen-down state.

On the other hand, by rotating the cam 32 counterclockwise, the end of the lever 41 slides along the tapered surface of the protrusion 34, thereby rotationally driving the guide shaft 2 in the direction of arrow A. As a result, the guide shaft 2
The small diameter portion presses the end of the positioning member 19 in the same manner as shown by the two-dot chain line in FIG. That is, the recording pen 7 is in the pen-up state. In addition,
The maximum value of the pen up amount is at the position where the lever 41 reaches the top surface of the protrusion 34 of the cam 32, that is, when the protrusion 34
It is determined by the height h.

By rotating the cam 32 in this way,
All recording pens can be raised and lowered at the same time. The rotation of the cam 32 can be electrically driven by the stepping motor 39 as described above, or can be driven manually. Here, when the stepping motor 39 is used for rotational driving, the time required for pen down can be lengthened by reducing the drive pulse frequency, and the pen will be brought down softly, reducing the impact when the pen is brought down. can. As a result, crushing of the pen tip can be reduced, and noise caused by impact can be reduced.

(Effects of the Invention) As explained above, according to the present invention, a multi-pen recorder can be realized in which the components can be made common and the entire device can be downsized, and the practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing one embodiment of the recording pen mechanism used in the present invention, FIG. 2 is a front view of the recording pen 7, FIG. 3 is a side view of FIG. 2, and FIG. FIG. 5 is an explanatory diagram of the recording pen attached to the pen holder, FIG. 6 is a configuration explanatory diagram showing one embodiment of the present invention, and FIG. FIG. 2 is a configuration explanatory diagram showing one embodiment of a pen up-down mechanism used in the figure. 1...First guide shaft, 2...Second guide shaft, 3
...carriage, 4...pen holder, 5...timing belt, 6...coupling member, 7...recording pen, 20...platen roller, 21...recording paper.

Claims (1)

[Claims for Utility Model Registration] Consisting of a platen roller around which recording paper is partially wound, and a first guide shaft and a second guide shaft arranged parallel to each other, the first guide shaft is the platen roller. The second guide shaft was arranged at a position not located on the circumference centered on the rotation axis of the platen roller, and the second guide shaft was arranged at equal angular intervals so as to be located on the circumference centered on the rotation axis of the platen roller. a plurality of pairs of guide shafts; a carriage of the same shape movably fitted to the first guide shaft of each pair of guide shafts; and a carriage of the same shape movably fitted to the second guide shaft of each pair of guide shafts; A pen holder of the same shape, a connecting member that connects the pen holder to a carriage fitted to each guide shaft of each pair of guide shafts, and a recording pen of the same shape that is detachably attached to each pen holder. A multi-pen recorder.