JPS6257515B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printer with a front inserter that can be switched freely between a tractor mode for printing on roll paper and a front inserter mode for printing on single sheet paper.

In conventional printers with front inserters, the front inserter is rotatable so that it is positioned directly above the platen when in use, and a tractor is fixed behind the platen. Separate driving sources were provided.

In the front inserter mode, the front inserter must be set at a close distance from the platen since the single sheet is being inserted. Therefore, tractors that use continuous long paper such as roll paper are fixed at a position away from the platen so as not to interfere with the front inserter.

For this reason, roll paper in the tractor mode is wasted as the distance from the platen to the tractor increases, contrary to resource conservation. Furthermore, drive sources are provided in both the front inserter and the tractor, making the printer expensive.

This invention has been made in view of the problems of conventional printers with front inserters, and includes a tractor that is rotatably placed in two positions near the platen, a tractor mode and a non-tractor mode, and a clutch that is operated in the tractor mode. The power from the drive source is transmitted only to the tractor through the mechanism, and the transmission to the clutch mechanism is cut off in front inserter mode.
The present invention aims to solve the above-mentioned problems by configuring the printer to transmit power from a drive source only to the front inserter.

The present invention will be explained below based on the drawings.

1 to 5 are diagrams showing an embodiment of the present invention. In the figure, 11L and 11R are main body side plates, which are provided spaced apart on both sides, and the platen 12 is spanned over them. The tractors 21L and 21R are slidably attached to a tractor shaft 22 and a sub-tractor shaft 23 that are spaced apart in parallel, and sandwich a roll paper (not shown) on both sides with another tractor (not shown). An idle gear 13 is rotatably mounted on the outside of the main body side plate 11R of the subtractor shaft 23. This idle gear 13 is connected to the main body side plate 11
A belt 15 is driven by a drive source 14 such as a motor provided inside the R. tractor shaft 2
2 has both ends protruding outward from holes 16 provided in the main body side plates 11L and 11R, respectively, and the tractor plates 24L and 2 extend between the subtractor shaft 23 and the
It is connected with 24R. A lever 25 connects both shafts 22 and 23 and rotates the tractors 21L and 21R around the sub-tractor shaft 23 to the tractor mode and front inserter mode.
L and 25R are provided inside the main body side plates 11L and 11R, respectively. A clutch mechanism 30 is provided on the main body side plate 11R side of the tractor shaft 22, and the clutch mechanism 30 includes a clutch plate 31 that meshes with the idle gear 13 and constantly rotates on the tractor shaft 22, as shown in FIG. It is composed of an adjuster 32 having an outer inclined surface 32a that engages with and disengages from the inner inclined surface 31a of the clutch plate 31. The adjuster 32 has a tapered flange 32b so that it can only slide on the tractor shaft 22 without rotating, and is always urged by a spring 33 to engage the clutch plate 31.
A switching plate 17 that disengages the adjuster 32 from engagement with the clutch plate 31 in the front inserter mode.
is provided on the main body side plate 11R (see FIG. 4). Also, inside the main body side plates 11L and 11R,
In the tractor mode, the tractor shaft 22 is received in the recess 18a and pulled by the spring 18b, so that the tractor 21
Support arm 18 that fixes and maintains the posture of L, 21RR
L, 18R are provided.

On the other hand, the front inserters 41L and 41R are parallel to each other, and both front inserter side plates 45L and 4
It is slidably provided on a connecting plate 42, a front inserter shaft 43, and a sub-front inserter shaft 44 connected to 5R. The front inserter side plates 45L and 45R are respectively connected to the main body side plate 1.
The front inserters 41L and 41R are rotatably connected to the tractor 21R and can be set in two positions, a front inserter mode and a non-front inserter mode, with respect to the platen 12 so as to cover the tractor 21R. has been done. The protrusions 47L, 47R of the front inserter side plates 45L, 45R support the support arms 1 provided on the main body side plate 11L in the front inserter mode.
The support arm 18L is engaged with the bent portion 18c of the support arm 8L (the right side is not shown) to push down the support arm 18L. A pulley 48 is fixed to the outside of the front inserter side plate 45R of the front inserter shaft 43, and a pulley 48 is fixed to the sub-front inserter shaft 44.
8, a stepped gear 49 is rotatably mounted, and in FIG. 1 showing the front inserter mode, the stepped gear 49 and the idle gear 13 are in mesh with each other. A belt 50 is stretched between the pulley 48 and the stepped gear 49.

Next, the effect will be explained.

First, the tractor mode using roll paper is set as shown in FIG. That is, by rotating the front inserters 41L and 41R upward,
The tractors 21L and 21RR are pulled out toward the platen 12, and the tractor shafts 22 are engaged with the recesses 18a of the support arms 18L and 18R to maintain the fixed position. In this state, the tractors 21L and 21R are moved left and right to set the roll paper. When you type, the belt 15 is powered by the drive source 14.
The idle gear 13 rotates, and the tractor shaft 22 further rotates via the clutch plate 31 of the clutch mechanism 30 and the adjuster 32. This tractor shaft 2
2, the roll paper is sequentially fed out by sprockets (not shown) provided in the tractors 21L and 21R.

When using the front inserter mode, in which the roll paper is used and the paper is cut and then the single sheet paper is used, the front inserters 41L and 41R are rotated toward the platen 12 and lowered as shown in Figure 1. .
At this time, the front inserter side plates 45L, 45R
The protrusions 47L and 47R are the support arms 18L and 18R.
The supporting arms 18L, 18R engage with the bent portions 18c of the
When the tractors 21L and 21R are pushed down, the tractor shaft 22 of the tractor shaft 22 disengages from the recess 18a and moves downward in the holes 16L and 16R of the main body side plates 11L and 11R, centering on the subtractor shaft 23. It is held by a spring 19 in the non-tractor mode as shown in FIGS. 2 and 3. In this state, when the tractor shaft 22 is lowered as shown in FIG.
2b abuts at the tapered portion and moves away from the clutch plate 31 in the axial direction against the force of the spring 33, so that the drive from the idle gear 13 is not transmitted to the tractor shaft 22 while the clutch plate 31 idles. The stepped gear 49 meshes with the idle gear 13 as shown in FIG. 1, so that the rotation of the idle gear 13 can be transmitted to the stepped gear 49.

Next, the front inserters 41L and 41R are moved and set to the left and right depending on the width of the sheet and the printing position. When a typing operation is performed, the power from the drive source 14 is transmitted to the idle gear 13 by the belt 15, and from the idle gear 13 to the stepped gear 49, and then the pulley 48 is rotated by the belt 50, and the power is transmitted to the front inserter shaft 43.
rotates. By this rotation of the front inserter shaft 43, paper feeding devices (not shown) provided in the front inserters 41L and 41R sequentially feed the single sheet of paper and perform printing.

To exit the front inserter mode and return to the tractor mode, the front inserters 41L and 41R are raised to the non-front inserter mode as shown in FIG. Spring 19
The tractors 21L and 21R are held in the non-tractor mode, and when the levers 25L and 25R are rotated against the force of the spring 19, the tractor mode is set as shown in FIG. This state is maintained by the support arm 18L shown in FIG. 3 engaging the tractor shaft 22 in the recess 18a and being pulled by the spring 18b.

As explained above, the present invention provides a tractor that is rotatably placed in two positions near the platen, a tractor mode and a non-tractor mode, and transmits power from a drive source only to the tractor via a clutch mechanism in the tractor mode. However, in the front inserter mode, the clutch mechanism is disconnected, and the printer is configured to transmit power from the drive source only to the front inserter, so the tractor is located close to the platen, eliminating wasted paper and saving resources. big. Furthermore, since the drive source can be shared by the tractor and the front inserter, only one drive source is required, making the printer lightweight, compact, and inexpensive.

[Brief explanation of the drawing]

1 to 5 show printers according to the present invention,
Figure 1 is a perspective view of the main parts in front inserter mode, Figure 2 is a perspective view of the main parts in the middle of switching to tractor mode, Figure 3 is a perspective view of the main parts similar to Figure 2, and Figure 4 is the clutch mechanism. The sectional view and FIG. 5 are perspective views of essential parts in tractor mode. 12...Platen, 14...Drive source, 21L,
21R...Tractor, 41L, 41R...Front inserter, 30...Clutch mechanism.

Claims (1)

[Scope of Claims] 1. In a printer with a front inserter that can be freely switched between a tractor mode for printing on roll paper and a front inserter mode for printing on single sheet paper, the printer is provided with a front inserter that is placed near the platen and that can be used in the tractor mode and non-tractor mode. a tractor that is rotated and set in two positions; a front inserter that is rotated and set in two positions relative to the platen, a front inserter mode and a non-front inserter mode, so as to cover the tractor; and the tractor a drive source that rotates the front inserter via a clutch mechanism in a truck mode, and drives the front inserter by releasing transmission to the tractor by the clutch mechanism in the front inserter mode. .