JPH0143250Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a paper holder for a tractor that feeds a continuous form (hereinafter referred to as a continuous form) for a printer, which is an output device for a computer or the like.

[Technology background]

In recent years, with the rapid development of industry, the mechanization of information processing and office processing has progressed, and electronic devices such as computers and multifunctional measuring instruments have come to be used more frequently.
Along with this, various forms of paper have come to be used in printers that hard record the processing results of these electronic devices. Among these, continuous sheets that can be arbitrarily cut with perforations set at predetermined lengths are fed by having feed holes provided at equal intervals on both sides or one side fitted with feed pins on a tractor, so that the printing process is easy. It is used more frequently than other forms of paper because it is continuous, easy to set, and convenient for mass printing. However, with the diversification of processing, various widths and formats of continuous books have come to be used, and the frequency of attachment and detachment of continuous books to tractors has increased. A paper press is always provided to prevent the continuous book from falling off when the continuous book is attached to or removed from the tractor.

[Conventional technology and problems]

Figure 1 shows a conventional tractor paper retainer.
1 is a continuous book, 2 is a feed hole provided on the side of the continuous book 1, 3
is a tractor, 4 is a presser, 5 is a pressing part of the presser 4, 6 is an elongated hole, 7 is a connection part of the presser 4, 8 is a pin provided near the connection part 7, 9 is a drive belt, 1
0 is the feed pin planted at equal intervals on the drive belt,
11 and 12 are side plates that sandwich and guide the drive belt 9, 12a is a connecting portion extending perpendicularly from the side plate 12, 13 is a support shaft provided on the connecting portion 12a, 14 is a pin provided on the connecting portion 12a, and 15 is a pin provided on the connecting portion 12a. pins 10, 14
a tension coil spring stretched between; 16 a drive shaft that drives the drive belt 9 via a pulley (not shown);
17 is a guide shaft that facilitates the movement of the tractor 3. In this way, when closing, the holding tool 4 is pulled by the tension coil spring 15 so that it does not open due to the load of the continuous book 1 alone, and when opening, the holding tool 4 is pulled at a position beyond the support shaft 13 so that it does not fall. I'm doing it like that.

However, when replacing continuous books, etc., the feed hole 2 gets caught on the feed pin 10, making it difficult to remove the continuous books. In other words, it was necessary to carefully remove the feed hole 2 from the feed pin 10 and then remove it from the tractor 3.

[Purpose of invention]

The present invention was devised in view of the above-mentioned drawbacks of the conventional printer, and it is an object of the present invention to provide a tractor for a printer that allows easy removal of a continuous book.

[Structure of the idea]

This purpose is, according to the present invention, in a printer tractor having a paper presser that presses the continuous book so that it does not fall off the feed pin, the paper press that stops at three positions: continuous book pressing, attachment, and detachment. This is achieved by providing a tractor for a printer characterized by having a pushing part that pushes out and separates the continuous book from a feeding pin in conjunction with a paper presser when the continuous book is removed.

[Example of idea]

Hereinafter, the present invention will be explained in detail based on the embodiments shown in FIGS. 2 to 5. In the figure, the same reference numerals as in FIG. 1 indicate the same parts.

FIG. 2 is a front view showing an embodiment of the present invention, in which 20 is a tractor, 21 is a paper presser, 22 and 23 are side plates, 23a is a connecting part protruding from the side plate 23, and 24 is a connecting part 23a. The cutout stopper 25 is an extruded part that has a length along the longitudinal direction of the tractor 20 and is approximately the same as the fitting width of the feed pin 10 and the feed hole 2, and is provided so as to be movable forward and backward in opposition to the continuous feed 1. It is.

FIG. 3 is a cross-sectional view of FIG. 2, in which 21a is a connecting portion of the paper presser 21, 23b is a protrusion provided on the side plate 23 and protrudes inside the tractor 20, and 26 is a sectional view of FIG.
27 is a protrusion provided on the connecting portion 21a, and 27 is the connecting portion 23.
28 is a shaft that can move forward and backward by being guided by a hole provided in the side plate 23; 29 is a stopper that is provided on the shaft 28 and comes into contact with the side plate 23; 30 is a protrusion 23
A torsion coil spring is fixedly attached to b and biases the shaft 28 to the left; 31 is an extrusion member having an extrusion portion 25 and rotatable around a support shaft 32; and 33 is a connecting portion between the shaft 28 and the extrusion member.

FIG. 4 is a sectional view showing a state in which the paper presser 21 in FIG. 3 is completely opened and the continuous book 1 is removed.

Next, the operation of the tractor of the present invention will be explained. In the state shown in FIG. 3, when the paper presser 21 is rotated around the support shaft 13 and opened approximately 90 degrees as shown by the dashed line, the torsion coil spring 30
The sum of the biasing force of the projection 26 and the load force caused by the contact of the projection 26 with the projection 27 is slightly larger than the rotational force of the paper presser 21 due to the tension coil spring 15, so the paper presser 21 is in the state shown by the dashed line. It will be held at Therefore, the continuous book can be attached in this state.

Furthermore, against the load of the protrusion 26 and the protrusion 27,
When the paper presser 21 is opened and the protrusion 26 passes over the protrusion 27, the paper presser 21 is pushed against the biasing force of the torsion coil spring 30 and pushed by the biasing force of the tension coil spring 15 until it comes into contact with the stopper 24. It will open. Therefore, since the paper presser 21 pushes the shaft 28, the extrusion member 31 rotates around the support shaft 32 in the gap provided in the side plate 22 via the connection part 33, so that the extrusion part 25 presses the continuous paper 1. will be separated from each other.

FIG. 5 is a sectional view showing another embodiment of the present invention, in which 40 is a tractor, 41 is a paper presser, 42,
43 is a side plate, 44 is at least two extrusion parts provided along the longitudinal direction of the tractor 40, and 45 is an extrusion member that integrally connects the paper presser 41 and the extrusion part 44. In this case, the paper presser 41
When the side plate 4 is opened, the extrusion part 44 is also moved and the side plate 4 is opened.
When the paper presser 41 is rotated until the protrusion 26 passes over the protrusion 27, the extrusion part 44 pushes up the continuous paper 1 and presses the feed pin 1.
It will be separated from 0.

In the above explanation, the protrusions 26, 2
7 was used, but it goes without saying that a click mechanism using a combination of a leaf spring and a groove may also be used.

[Effect of idea]

Since the present invention has the above-mentioned configuration, simply by opening the paper presser, the extrusion part pushes up the continuous paper and separates the continuous paper from the feed pin, making it easy and quick to remove the continuous paper from the tractor. This reduces the burden on the operator.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional tractor, Fig. 2 is a front view of a tractor that is an embodiment of the present invention, Fig. 3 is a sectional view of Fig. 2, and Fig. 4 is a paper presser shown in Fig. 3. FIG. 5 is a sectional view showing another embodiment of the present invention. 1... Continuous book, 2... Feed hole, 10... Feed pin, 3, 20, 40... Tractor, 4, 21, 4
1... Paper presser, 25, 44... Extrusion part.

Claims (1)

[Scope of utility model registration request] A printer tractor has a paper holder that presses the continuous book so that it does not fall off the feed pin, and the paper holder is designed to stop at three positions: pressing the continuous book, loading it, and removing it, and the paper holding device when removing the continuous book. A tractor for a printer, characterized in that it has a pushing part that pushes out and separates a protruding continuous book from a feeding pin in conjunction with a tool.