JPH0537802U - Tractor device - Google Patents

Abstract

(57) [Summary] [Structure] Rollers are provided at corresponding positions of the tractor and the tractor cover, and the sheets are sandwiched by them. [Effect] It is possible to prevent the paper from fluttering up and down during the transportation and to be detached from the tractor pin or the transportation hole from being scraped. Therefore, since the continuous paper can be always transported correctly, a highly reliable printer can be obtained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tractor device used in a printer device to convey continuous paper.

[0002]

[Prior Art]

 FIG. 3 is a side view showing an example of a conventional tractor device.

As shown in FIG. 3, a conventional tractor device used in a printer device for transporting continuous paper has a plurality of tractor pins 19 that engage with transport holes provided in continuous paper (paper) 2. And a tractor 11 having a belt 17 and a base 14 for holding the belt 17, in which a plurality of tractor pins 19 are planted at equal intervals to circulate, and to the upper surface of the tractor 11 held by a spring 18. The tractor cover 13 is provided so as to be openable and closable, and a gap B is provided between the tractor 11 and the tractor cover 13.

[0004]

[Problems to be solved by the device]

 In the conventional tractor device as described above, since the sheet 2 conveyed by the tractor pin 19 moves up and down within the gap B, the sheet 2 is dislocated from the tractor pin 19 or the sheet 2 flaps and a conveying hole is formed. It has the drawback that it can be damaged.

[0005]

[Means for Solving the Problems]

 The tractor device of the present invention comprises a plurality of tractor pins that engage with transport holes provided in a continuous sheet, a belt that circulates the plurality of tractor pins at equal intervals, and a base that holds the belt. A tractor device including a tractor having a tractor and a tractor cover that is provided so as to be openable and closable with respect to an upper surface of the tractor, comprising: a first roller provided on both sides of the belt at a front portion and a rear portion of the tractor. The tractor cover includes a second roller provided at a position corresponding to the first roller, and a spring that applies a pressure to the first roller and the second roller.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line CC of the embodiment shown in FIG.

As shown in FIG. 1 and FIG. 2, in the present embodiment, a plurality of tractor pins 9 and a plurality of tractor pins 9 that engage with a transport hole provided in a continuous paper (paper) 2 are provided. A tractor 1 having a belt 7 which is planted at intervals and circulates and a base 4 which holds the belt 7, and a tractor cover 3 which is held by a spring 8 and is openable and closable with respect to the upper surface of the tractor 1. The tractor 1 is provided with rollers 6 on both sides of the belt 7 at its front and rear portions. On the other hand, the tractor cover 3 is provided with rollers 10 at positions corresponding to the rollers 6 of the tractor 1. The roller 10 is provided with a spring 5, and the force of the spring 5 presses the roller 10 against the roller 6. The spring 8 urges the tractor cover 3 toward the tractor 1, and when the paper 2 is mounted on the tractor device, the tractor cover 3 is opened against the force of the spring 8 (reference numeral 3a). Put it in place. When the mounting of the paper 2 is completed and the tractor cover 3 is closed again, the roller 10 biased by the spring 5 presses the paper 2 against the roller 6.

As a result, when the paper 2 is conveyed by the tractor pin 9 which makes a circular motion by the belt 7, the paper 2 does not flap up and down, so that the paper 2 comes off the tractor pin 9 or is used for conveying the paper 2. The hole will not get scratched.

[0010]

[Effect of the device]

 As described above, in the tractor device of the present invention, the rollers are provided at the corresponding positions of the tractor and the tractor cover, and the paper is sandwiched by the rollers, so that the paper flutters up and down during conveyance, and There is an effect that it will not come off from the pin and the transport hole will not get worn out. Therefore, since continuous paper can always be transported correctly, a highly reliable printer can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line CC of the embodiment shown in FIG.

FIG. 3 is a side view showing an example of a conventional tractor device.

[Explanation of symbols]

 1 tractor 2 continuous paper (paper) 3 tractor cover 4 base 5 spring 6 roller 7 belt 8 spring 9 tractor pin 10 roller 11 tractor 13 tractor cover 14 base 17 belt 18 spring 19 tractor pin

Claims (1)

[Scope of utility model registration request] 1. A plurality of tractor pins that engage with transport holes provided in continuous paper, a belt that circulates the plurality of tractor pins at equal intervals, and a base that holds the belt. In a tractor device including a tractor and a tractor cover that is provided so as to be openable and closable with respect to the upper surface of the tractor, a first roller provided on both sides of the belt at a front portion and a rear portion of the tractor, and the tractor cover. 2. A tractor device comprising: a second roller provided at a position corresponding to the first roller; and a spring that applies pressure to the first roller and the second roller.