JPS5925656Y2 - Paper feeding device for printers, etc. - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a paper feeding device such as a printer that uses a track to feed continuous forms.

Generally, this kind of device has a structure as shown in FIG.

First, the printer 1 consists of a printer main body 2 and a paper feeding device 3, and an insertion slot (not shown) into which a continuous form is inserted is formed at the upper rear surface of the printer main body 2.

Further, there is a paper discharge port in the front part of the paper feeder 3, and the paper is conveyed by the paper feeder 3.

An angular drive shaft 5 and a round support shaft 6 are mounted parallel to each other at a predetermined distance between the opposing side walls 4 of the paper feeding device 3.

A pair of left and right tracks 7 are slidably provided on the drive shaft 5 and the support shaft 6.

That is, this track 7 is supported by the support shaft 6 and has a belt portion 9 on which sprockets 8 are formed, which are sequentially rotated by the operation of the drive shaft 5 which is rotated by a drive source (not shown).

Therefore, a continuous form having sprocket holes that engage with the sprocket 8 on both sides thereof is used.

A lid 10 for holding down continuous forms set on the sprocket 8 is provided so as to be openable and closable around a shaft 11.

This cover body 10 has an escape hole 1 through which the sprocket 8 escapes.
2 is formed.

Therefore, when setting continuous forms, open the lid 10 and insert the sprocket holes of the continuous forms into the sprocket 8.
It is only necessary to close the lid body 10 by engaging it.

By the way, it is necessary to change the distance and position between the pair of tracks 7 according to the paper width and print position of the continuous form, and after setting the position of the track 7, it is necessary to prevent the track 7 from moving in the left and right sliding direction. It is something that cannot happen.

Therefore, a stopper means is provided to prevent the track 7 from sliding, and the most common method for this is to fix the track 7 and the support shaft 6 using the tightening force of a screw. However, as shown in FIGS. 2 and 3, eccentricity is utilized.

That is, the support plate 13 is provided on the outer surface of the track 7.
is fixed, and the support shaft 6 is positioned between the support plate and the drive plate 14 is provided rotatably around the shaft 15, and the support plate 13 and the drive plate 1 are
A spring 16 is provided between the drive plate 14 and the drive plate 4 to urge the drive plate 14 toward the support shaft 6.

Here, the axis 15 is shifted and the circular arc around it is the eccentric part 1
It is said to be 7.

Therefore, when setting continuous forms, first open the lid 10 and put your fingers on the support plate 13 and the drive plate 14 as shown in FIG.
Rotate clockwise.

As a result, the eccentric portion 17 separates from the support shaft 6, and the track 7 becomes slidable on the drive shaft 5 and the support shaft 6. Therefore, the track 7 can be slid to match the paper width of the continuous form. Set continuous forms.

When the lid 10 is closed and the support plate 13 and drive plate 14 are released, the drive plate 14 is pulled by the spring 16 and its eccentric portion 17 is pressed and joined to the support shaft 6, as shown in FIG. Therefore, the track 7 is fixed in position.

However, when sliding the track 7, the opening and closing of the lid 10 and the operation of the drive plate 14 serving as a stopper are independent of each other, even though the lid 10 is opened and the operation of the drive plate 14, which serves as a stopper, is stopped. It is inconvenient.

This idea was made in view of these points, and it is an easy-to-use printer that can automatically release the stopper mechanism and make the truck slidable only when the lid of the truck is opened. The purpose of this invention is to obtain a paper feeding device.

This idea provides a lid body with a protrusion and a stopper mechanism on the track, and the stopper mechanism is normally pressed against the support shaft to fix the track in position, and when the lid body is opened, the stopper mechanism is connected to the stopper mechanism. The track with the stopper mechanism released can be slid on the support shaft, making it easy to set continuous forms and is convenient to use.

An embodiment of this invention will be explained based on FIGS. 4 to 7.

Components that are the same as those shown in FIGS. 1 to 3 are designated by the same reference numerals, and explanations thereof will be omitted.

First, looking at the structure of the truck body 18 of the truck 7, a sliding hole 19 through which the drive shaft 5 and the support shaft 6 pass is formed in the truck body 18. A rotating body that rotates freely and follows its rotation (
(not shown) is provided.

The circumferential surface of this rotating body has a gear shape, and a part of the circumferential surface protrudes from a notch formed in the track body 18, and the inner circumferential surface of the track body 18 has a gear shape of the rotating body. A belt portion 9 having a gear-shaped portion that engages with the belt portion is attached.

Thereby, when the drive shaft 5 rotates, the belt portion 9 having the sprocket 8 rotates around the track body 18.

Auxiliary plates 21 are attached to the side surface of the truck body 18 by adhesive or the like and spaced apart from each other by a certain distance using square timbers 20.

This auxiliary plate 21 is also formed with a sliding hole 22 for the drive shaft 5 and support shaft 6.

Furthermore, bearing pieces 23 are bent at the upper portions of both ends of the auxiliary plate 21 .

A shaft portion 24 is attached to this bearing piece 23 by a pin 25, and a lid body 26 is provided which can be rotated to open and close around this pin 25.

Here, one shaft part 24 is formed in an arc shape, and an eccentric part 27 in which the position of the pin 25 is shifted from the center and becomes a protrusion part.
It is said that

Furthermore, a stopper mechanism 28 is attached to the auxiliary plate 21.

That is, an L-shaped drive plate 30 having a receiving part 29 whose eccentric part 27 approaches and separates depending on the rotational position of the lid 26 is rotatably provided by a support pin 31, and other parts of the drive plate 30 are provided. A stopper plate 34 having a clamping part 32 that clamps the end and a joint part 33 that approaches and separates from the support shaft 6 is rotatably supported by a support pin 35 eccentric to the joint part 33.

Here, the other end side of the stopper plate 34 and the auxiliary plate 21
A spring 37 is provided between the stopper plate 34 and a locking piece 36 formed on the stopper plate 34, and the stopper plate 34 is biased toward the support shaft 6, that is, counterclockwise.

In such a configuration, when the lid 26 is closed, the eccentric portion 27 of the lid 26 touches the drive plate 30.
It is not in contact with the receiving part 29 of.

As a result, the drive plate 30 does not act on the stopper plate 34, and the stopper plate 34 is pulled by the spring 37 so that its joint 33 is pressed and joined to the support shaft 6 as shown in FIG.

Therefore, the track 7 is fixed in position in the sliding direction.

Therefore, when setting continuous forms on the truck 7, the lid 26 is opened.

When the lid body 26 is opened, the eccentric portion 27 eccentric to the pin 25 pushes the receiving portion 29 as shown in FIG. 7, causing the drive plate 30 to rotate counterclockwise.

This causes the stopper plate 34 to
is rotated clockwise against the

Therefore, the joint portion 33 of the stopper plate 34 is separated from the support shaft 6, and the track 7 is released from being fixed in position and becomes slidable.

Therefore, when the sprocket hole of a continuous form is engaged with the sprocket 8, the track 7 can be slid as it is to match the paper width of the continuous form.

After setting the continuous form on which the track 7 has been slid in this manner, when the lid 26 is closed, the eccentric portion 27 is separated by the drive plate 30, so that the stopper plate 34 returns to the normal state shown in FIG. Returning, the track 7 is fixed in position.

Therefore, when setting continuous forms on the track 7, it is only necessary to open and close the lid 26, and there is no need to separately switch the position of the track 7 between fixed position and slidable position, as in the conventional case, so it is easy to use. .

In this embodiment, the protrusion is formed as an eccentric part 27, but it does not necessarily have to be eccentric, and the receiving part 29 may be shaped such that the protrusion pushes it away only when the lid 26 is opened.

In this invention, as mentioned above, the track that can slide freely on the drive shaft and the support shaft is provided with a lid body having a protrusion and a stopper mechanism that is linked to the opening and closing of this lid body. The stopper mechanism is press-jointed to the support shaft to fix the position of the I/rack, and when the lid is opened when setting continuous forms, the stopper mechanism to the support shaft is automatically released to allow the track to slide freely. It is easy to use and allows continuous forms to be solder.Especially, since the joint where the track is stopped against the support shaft is pressed from the direction perpendicular to the longitudinal direction of the support shaft, it is easy to close the lid. The truck will not be misaligned when
As a result, the positioning of the 1-rack is accurate, and since the lid body is biased between the open and closed states with a click action, there is no need to hold the lid body by hand when opening, making it easy to operate. is good.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional example, Fig. 2 is a side view of the track in a fixed position, Fig. 3 is a side view of the track in a slidable state, and Fig. 4 is an embodiment of the invention. 5 is a perspective view of the assembled state, FIG. 6 is a side view thereof, and FIG. 7 is a side view when the lid is opened. 2...Printer body (main unit), 3...
Paper feeder, 5... Drive shaft, 6... Support shaft, 7... Track, 26... Lid body,
27... Eccentric part (protrusion), 28...
Stopper mechanism, 29... Receiving part, 33...
・Joint part.

Claims (1)

[Scope of utility model registration request] A drive shaft and a support shaft are provided in parallel to a paper feeding device provided in the main body of a printer, etc., and a pair of tracks that carry out continuous forms having sprocket holes by the operation of the drive shaft are connected to the drive shaft and the support shaft. A lid is provided to be slidable on the track and can be opened and closed to hold down the continuous forms set on the track, and a protrusion is provided on the shaft of the lid and interlocks with the opening/closing operation of the lid around the shaft. The track is provided with a stopper mechanism that fixes the track in the sliding direction by having a joint part that presses and joins the support shaft from a direction perpendicular to the longitudinal direction of the support shaft at all times, and the stopper mechanism that fixes the track in the sliding direction. A spring is provided for biasing the part in the direction of press-joining the projection to the support shaft, and a receiving part is provided that comes into contact with the protruding part, and a force from the receiving part causes the lid body to have a click action between an open state and a closed state. The shape of the protrusion is determined by the shape of the biased cam, and the stopper mechanism is moved away from the support shaft by being pressed by the protrusion linked to the opening of the lid, thereby making the track slidable. Paper feeding device for printers, etc.