JPH0419002Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention is a method of adjusting the width of a medium such as a form to a reference surface while running the medium, and accurately aligning the medium in the lateral direction with the reference position of the medium. This relates to the width adjustment mechanism.

(Prior Art) A conventional method used to align a medium such as a form to a reference position such as a horizontal position or a transport direction position will be described with reference to the drawings.

FIG. 7 is a plan view illustrating a conventional alignment operation. In the figure, when a medium 21a (indicated by a dotted line) inserted in the E direction is detected by the sensor 22, the medium 21a is It is clamped by rollers 23a and conveyed. When the conveyed medium 21a is detected by the sensor 25, it stops,
The position of the medium 21a in the transport direction is determined.

Next, the clamps on the medium 21a by the pair of rollers 23a are removed, and the medium 21a is pressed from above by the medium width shifting member 26 and moved so as to be drawn toward the medium abutment reference surface 27. Lateral alignment is performed as shown in .

After that, the medium 21 is clamped by the rollers 23a and 23b, and the medium 21 is sent to a desired position such as a writing position or a printing position by performing a feeding operation of a certain number of pulses from the above-mentioned position using a pulse motor or the like (not shown). It was getting worse.

(Problem to be solved by the invention) However, in the device with the above configuration, the medium 21
After the alignment of a in the transport direction is completed, the medium transport must be temporarily stopped when starting the alignment in the lateral direction. Moreover, the medium width adjusting member 2
In order to draw the medium 21a to the reference surface using 6, in addition to the power system for conveying the medium 21a, there is a problem in that an extra power system for adjusting the width of the medium is required. .

Japanese Utility Model Application Publication No. 56-196044 states that due to deenergization of the plunger magnet, the friction coefficient between the alignment roller and the sheet is larger than that between the drive roller and the sheet, and the biasing force of the tension spring is increased between the drive roller and the sheet. This technology overcomes the friction caused by rotating the bracket clockwise and aligning the entire side edge of the sheet so that it contacts the reference surface. The problem of the need for a power system is temporarily resolved.

However, the technique disclosed in this publication is easily influenced by the coefficient of friction between the alignment roller and the sheet and the coefficient of friction between the drive roller and the sheet, resulting in drawbacks such as difficulty in adjusting each part.

The present invention overcomes the problems and shortcomings of the prior art, performs width shifting while conveying the medium, performs media width shifting only using the conveying power system, and performs stable and reliable width shifting. The purpose is to provide a mechanism.

(Means for Solving the Problems) The configuration of the present invention for achieving the above object will be explained using FIGS. 1 to 5 corresponding to the embodiments.
The present invention provides a media width shifting mechanism that includes a link 2 that is reciprocably provided by a drive source 1 such as a magnet, a spring 14 that is guided by the link 2, and a spring 14 between the link 2 and the rotating shaft 6. A fixed lever 11, a lever 15 that engages with the link 2 and is rotatably supported on a fixed stud 15a, and a limiter 7 that engages with the lever 15 and is rotatable about the rotating shaft 6. and a pressure roller which is rotatably formed by a spring 8 which is engaged with one end of the limiter 7 and is pivotally supported by a shaft 5 which is mounted on the rotary shaft 6, and which is rotatable together with the rotary shaft 6. It consists of at least one pressure roller mechanism unit comprising a bracket 4a and a pressure roller 4 rotatably supported by the bracket 4a, and moves the link 2 by energizing the drive source 1 such as the magnet. The pressure roller bracket 4a rotates, and the pressure roller 4 clamps the medium, and also rotates to pull the medium toward the reference surface for positioning.

(Function) According to the present invention, since the above-mentioned medium width adjusting mechanism is adopted, when the drive source 1 such as a magnet is energized, the link 2 moves in the direction B, and the lever 11 rotates clockwise. do. Therefore, the rotating shaft 6 also rotates. Therefore, the pressure roller bracket 4
The pressure roller 4 rotates clockwise together with a to clamp the medium.

On the other hand, the lever 15 is pushed in the direction B by the stud 20 of the link 2 and rotated clockwise. As a result, the limiter 7 rotates counterclockwise and is disengaged from the pressure roller bracket 4a, and the pressure roller bracket 4a, which is being pulled by the spring 8, rotates in the direction C, with the medium being the reference point. Face 9
The horizontal alignment is completed.
Therefore, the above-mentioned problem can be eliminated.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a plan view of essential parts of a media width adjustment mechanism according to an embodiment of the present invention, showing the state before the medium is clamped, Fig. 2 is a front view thereof, and Fig. 5 is a perspective view thereof. . In these drawings, reference numeral 1 denotes a magnet serving as a driving source, and a link 2 is connected to the plunger 1a. 2a is a guide groove provided in the link 2. 3 is a link, 4 is a pressure roller, and 4a is a pressure roller bracket, which are rotatably supported around a shaft 5. 6 is a rotating shaft, and the shaft 5 is installed perpendicularly to the tip of this shaft. Reference numeral 7 denotes a limiter, which is provided so as to be freely rotatable with respect to the rotating shaft 6, and has a tension spring 8 stretched between it and the pressure roller bracket 4a, and which holds the pressure roller bracket 4a at its locking portion. It is locked at 7a. On the other hand, Limita 7
Since the stud 7c protruding from the stud 7c rotatably supports the link 3 with the tension spring 10 stretched between it and the fixed wall 9, the link 3 is biased clockwise as shown by the arrow A. The end locking portion 3a of the link 3 is locked at one end 11b of the lever 11. The lever 11 is fixed to the rotating shaft 6, and a tension spring 14 is stretched between a stud 11a fixed to one end of the lever 11 and a stud 2b fixed to the link 2, and the link 2 is guided. The lever 15 is rotatable around the stud 15a, and is biased by the magnet 1 to the link 2.
The stud 15 is rotated in the C direction (clockwise) by the movement in the B direction, and the stud 15 is fixed to one end of the lever 15.
B has a locking portion with a stud 2c fixed to the link 2 so that the limiter 7 can be rotated in the direction opposite to C (counterclockwise). In addition, the tension spring 16
is for magnetic reset.

Next, the operation of this embodiment will be explained using FIGS. 2 to 6. Here, FIG. 3 is a front view showing the state when the magnet is energized, and FIG. 4 is a perspective view thereof.

First, when the medium 20a is fed from the direction F, it is biased by the magnet 1 and acts in the left direction as indicated by the arrow B of the link 2. Therefore, as shown in FIG. 3, the lever 11 rotates clockwise as indicated by arrow A via the tension spring 14, and the rotating shaft 6 to which the lever 11 is fixed rotates clockwise and is attached to the tip thereof. The pressure roller 4, which is currently attached, is rotated to the right to clamp the medium 20a. Therefore, the medium 20a is fed while being held and pressed between the feed roller 30 at the bottom.

Next, as the plunger 1a of the magnet 1 moves further in the direction B, the fixed stud 2c of the link 2 begins to push the bent locking part of the lever 15, and the lever 15 moves in the direction of arrow C centering on the stud 15a. The limiter 7, which is engaged with the stud 15b, rotates counterclockwise (counterclockwise) opposite to the arrow A. Therefore, the locking force between the locking portion 7a of the limiter 7 and the engaging portion of the pressure roller bracket 4a is weakened, and the pressure roller bracket 4a is rotated clockwise as shown by the arrow C by the tension spring 8. (See FIG. 1), the medium width adjustment operation is performed on the fixed wall 9 which becomes the reference surface.
FIG. 6 is a plan view showing this state, in which the medium 20a shown by the dotted line that has been conveyed from the F direction is conveyed while being held between the feed roller 30 and the pressure roller 4, and after the width adjustment operation is performed, the medium 20a is Accurate alignment is performed with respect to the fixed wall 9 serving as a reference plane.

As described above, since width adjustment can be performed while feeding the medium, there is an advantage that the distance for feeding the medium required for media width adjustment is small.

Furthermore, by deenergizing magnet 1,
The mechanism operates in the opposite direction to the above operation, and the pressure roller 4 is returned to a state parallel to the fixed wall 9, and the medium 20
1, 2, and 5. Therefore, when the medium runs backwards,
The medium can be returned while maintaining the reference position.

Incidentally, in this embodiment, as shown in the drawings, a pair of medium width adjustment mechanism units each consisting of one pressure roller are connected by a link 3 and operated simultaneously, but it is also possible to use only one such mechanism unit.
However, in this case, there is an advantage that the configuration is simpler than when using the pair of medium width adjusting mechanism units, but as shown in FIG. Compared to the media being moved in parallel to the fixed wall 9 (the media 20), the width of the media is ensured.
Since this cannot be done in the case of 1, there is a drawback that the traveling distance of the medium 20a required for adjusting the medium width becomes extremely long. However, it goes without saying that it has superior effects compared to conventional mechanisms.

(Effects of the invention) As explained in detail above, according to the invention, the pressure roller bracket, which is fixed to a rotating shaft that rotates by the urging of a driving source such as a magnet and biased by a spring, can be freely rotated. The provided pressure roller is engaged with a rotatable lever on the rotating shaft, and the rotating shaft is rotated by the force of the drive source, so that the pressure roller is brought into contact with and clamped on the medium, and the medium is fed. At the same time, by rotating another lever, the locking force of the lever engaged with the pressure roller bracket is weakened, and the pressure roller is moved by the tensile force of the tensioned spring. Since the configuration is such that the media is aligned with the reference plane by rotating the bracket, it is possible to perform width adjustment while conveying the medium, and to perform the media width adjustment using only the conveyance power system, and to perform stable and reliable operation. This not only ensures the lateral alignment of the media, but also reduces the media feeding distance required for width adjustment compared to conventional methods. When refeeding the medium, it is possible to return and eject the medium while maintaining the reference position of the medium.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the essential parts of an embodiment of the present invention, showing the media width adjustment mechanism before the media clamp, Fig. 2 is its front view, and Fig. 3 shows the state when the drive source is energized. FIG. 4 is a perspective view thereof, FIG. 5 is a perspective view of FIG. 1, FIG. 6 is a diagram of a state of media shifting, and FIG. 7 is a plan view of main parts of a conventional media shifting mechanism. It is. 1... Magnet, 2, 3... Link, 4...
Pressure roller, 4a... Pressure roller bracket, 5... Shaft, 6... Rotating shaft, 7... Limiter, 8, 10, 14, 16... Spring, 9
... Fixed wall (reference surface), 11, 15 ... Lever,
20...media, 30...feed roller.

Claims (1)

[Scope of utility model registration request] A link 2 is provided to be reciprocatable by a drive source 1 such as a magnet in a media width adjustment mechanism that moves the medium to a reference surface and aligns the medium by holding and conveying the medium between a feed roller and a pressure roller.
A lever 11 guided by this link 2, having a spring 14 between it and fixed to the rotating shaft 6, engages with the link 2,
A lever 15 is rotatably supported on a fixed stud 15a, a limiter 7 is engaged with the lever 15 and is rotatable with respect to the rotating shaft 6, and a limiter 7 is engaged with one end of the limiter 7 and is rotatable with respect to the rotating shaft 6. A pressure roller bracket 4a is pivotably supported on a shaft 5 mounted on a shaft 6 and is pivotable by a spring 8 biased in the direction of a reference plane 9. It consists of at least one pressure roller mechanism unit having a pressure roller 4 rotatably supported, and by energizing the driving source 1 such as the magnet and moving the link 2, the pressure roller bracket 4a is rotated. The pressure roller 4 then clamps the medium, and by moving the link 2, the pressure roller bracket 4a
A media width shifting mechanism characterized in that the media is rotated to pull the media toward a reference surface 9 for alignment.