JP2559929Y2 - Recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording various images in response to a signal from a computer or the like, and in particular, a recording medium is moved by a driving roller and a pinch roller. And a recording apparatus for performing recording. 2. Description of the Related Art FIG. 4 is a view showing a recording medium sliding mechanism and a recording mechanism in a conventional apparatus. In the figure, 5 is a pinch roller, 7 is a driving roller, 4 is an arm which holds the pinch roller and is rotatable around an axis supported at both ends by a base 3, 2 is a compression spring, and 3 is a spring. The base is configured to hold the arm through the main body and to be movable along both ends of the main body bar 8 fixed to the main body of the apparatus, and these constitute a recording medium sliding mechanism. Reference numeral 9 denotes a recording medium. 10 is a recording pen, 11 is a holding pen and Y
A pen block configured to move along a rail,
13 is a platen roller and 14 is a platen. When recording is performed by this apparatus, a recording medium 9 is sandwiched between a pinch roller 5 and a driving roller 7, and
The recording medium is moved by rotating the driving roller 7 by a driving source such as a motor (not shown), and at the same time, the recording pen 10 is landed on the recording medium 9 by the pen block 11 and moved in a direction perpendicular to the moving direction of the recording medium 9. By doing so, a desired recording is performed. The pinch roller 5 is pressed by the drive roller 7 with the recording medium 9 sandwiched about the axis by the restoring force of the compression spring 2. Further, since this recording medium sliding mechanism is configured to move while gripping both ends of the recording medium 9, two recording medium sliding mechanisms are installed in the recording apparatus. Further, the recording medium sliding mechanism is movable along the main body bar 8 according to the size of the recording medium to be used. [0004] In this type of recording apparatus, the gripping force of the recording medium sliding mechanism has to be adjusted according to the thickness of the recording medium. For example, when a thin recording paper is used as a recording medium, the recording medium sliding mechanism must be adjusted so as to have a relatively low gripping force, and when using a thick recording paper, a strong gripping force. In the conventional apparatus, the above-mentioned problem has been solved by adjusting the spring pressure of the compression spring. As a configuration,
The amount of expansion and contraction of the spring 2 is changed by rotating and moving the nut holding the spring 2, whereby the spring pressure is adjusted to adjust the contact pressure of the pinch roller 5. However, it is very difficult to adjust the pressing forces of the two pinch rollers to be equal by the adjusting method as in the conventional apparatus, for example, when the pressing forces of the two pinch rollers are not equal. When the recording medium is moved in the recording medium, the recording medium has a drawback that the recording medium moves along a locus that draws an arc with the weaker pressure as the center side, thereby making it impossible to perform accurate recording. I was SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. By easily switching the contact pressure of a pinch roller, it is possible to obtain a good effect without being affected by the thickness of a recording medium. It is an object of the present invention to provide a recording device capable of performing various recordings. In order to achieve this object, in the recording apparatus according to the present invention, the contact pressure variable member changes the spring pressure of a compression spring for pressing the pinch roller against the drive roller to adjust the gripping force of the recording medium. The most important feature is its composition. According to the recording apparatus of the present invention, in the recording medium sliding mechanism, the contact pressure variable member (the second member) for changing the spring pressure of the compression spring for pressing the pinch roller against the driving roller. The variable contact pressure member has a plurality of surfaces for locking the compression spring, and the surfaces for locking the spring are configured to have different heights from the base, respectively. The pressure variable member has a hole for passing a long screw common to each surface so that the surface can be switched while being held by the spring. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a recording apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing the recording apparatus of the present invention, and FIG. 2 is a perspective view showing the recording apparatus of the present invention. In the figure, 1 is a contact pressure variable member, 2 is a compression spring, 6 is a long screw, 62 is a nut, 3 is a base (base), 4 is an arm, 5 is a pinch roller, and 7 is a driving roller. The variable contact pressure member 1
As shown in the figure, there are two surfaces for locking the spring, and these are configured so as to form an angle of 90 degrees with each other, so that when the spring is locked on each surface, the amount of expansion and contraction of the spring is different. The positions (height from the base) for locking the springs are different from each other. Further, a hole 103 is formed at the center of the central portion so as to allow the long screw 6 to pass therethrough and to make the contact pressure variable member 1 movable to change the spring pressure. Further, in order to easily move the variable contact pressure member 1, a corner portion in contact with the base 3 is chamfered, and a convex portion 104 is provided in a portion in contact with the base 3. The contact pressure variable member 1 is configured to be fixed by engaging the convex portion 104 with a concave portion (not shown) of the base 3. The base is held by a main body bar 8 fixed to the main body of the recording apparatus, similarly to the conventional apparatus, and an arm 4 rotatably holding a pinch roller 5 is provided by an axis fixed to the base 3. It is configured to be rotatable around. The long screw 6 fixed to the arm 4 is configured to pass through the base 3 and the variable contact pressure member 1.
Is passed through the spring 2, and the spring 2 is compressed by the nut 62 via the washer 63. Due to the restoring force of the compression spring 2, the arm 4 receives a force in the clockwise direction about the axis,
Thus, the pinch roller 5 is configured to be pressed against the driving roller 7. When the contact pressure variable member 1 is in the state shown in FIG. 1, the height of the first spring engaging surface 101 is relatively higher than the position of the base, whereby the amount of expansion and contraction of the spring 2 increases. Therefore, the force of the pinch roller 5 pressing the drive roller 7 (restoring force of the spring) increases, and the force of gripping the recording medium 9 increases. To reduce the gripping force of the recording medium, first, as shown in FIG.
The convex portion engaging with the concave portion of the base is lifted upward against the restoring force of the base member, and the convex portion engaging with the concave portion of the base is removed. Let it down. As a result, the height of the second spring locking surface 102 for locking the spring 2 is lower (near the base) than in the previous state, and the amount of expansion and contraction of the spring 2 is reduced, so that the pinch roller 5 is driven. The force pressing the roller 7 is reduced, and the force holding the recording medium 9 is reduced. Further, as another embodiment, as shown in FIG. 3, the shape of the contact pressure variable member is configured such that the thicknesses of the respective surfaces a, b, c, and d are different from each other. 4
It may be possible to switch between stages. According to the present invention, as described in detail above, the gripping force of the recording medium can be easily switched, and good recording can be performed regardless of the thickness of the recording medium. Since the spring locking surfaces are configured to form a 90 degree angle with each other,
The effect of minimizing the space for varying the contact pressure and solving the above-mentioned problem without increasing the size of the device is achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view and a perspective view showing a recording device of the present invention. FIGS. 2A and 2B are a diagram and a perspective view showing the operation of the contact pressure varying means of the present invention. FIG. 3 is an explanatory view showing another embodiment of the present invention. FIG. 4 is a sectional view showing a conventional recording apparatus. [Description of Signs] 1 Contact pressure varying means 101 First spring locking surface 102 Second spring locking surface 103 Hole 104 Convex portion 2 Compression spring 3 Base (base) 4 Arm 5 Pinch roller 6 Long screw 63 Washer 7 Drive Roller 8 Main Bar 9 Recording Medium 10 Recording Pen 11 Pen Block 12 Y Rail 13 Platen Roller 14 Platen

Claims (1)

(57) [Claims for Registering Utility Model] A recording device for inserting and transporting both ends of a recording paper 9 by a driving roller 7 and a pinch roller 5, wherein a contact pressure of the pinch roller 5 with respect to the driving roller 7 is variable. In the recording apparatus having a variable contact pressure means, the variable contact pressure means is a member holding the pinch roller 5 at one end and having an extension 41 formed at the other end side, and extends over the housing. A pinch roller holding member 4 which is rotatably supported on the shaft 15 and is configured so that the pinch roller 5 comes into contact with the driving roller 7 when the pinch roller 5 rotates by a predetermined amount. The pinch roller holding member 4 is held at a predetermined position. The pinch roller holding member 4 has a predetermined hole 3 extending above the extension 41 at the other end thereof.
A first member 3 for holding the pinch roller holding member 4 having a plate 31 on which a second plate 2 is formed, a first plate 101 and a second plate 1 having different thicknesses.
2 are joined at a predetermined angle, have a substantially L-shape, and are cut out in the central longitudinal direction across the first and second plates 101 and 102.
03, a hole 32 formed on the extension 31 at the other end of the pinch roller holding member 4 and formed in the plate 31 of the first member 3, and a second member 1 A third member 6 extending upward through the elongated hole 103 formed; a spring 2 inserted between the upper end 62 of the third member 6 and the second member 1; The substantially L-shaped second member 1 is inserted into the long hole 10
By rotating the third member 6 through the third member 3, the first and second members of the second member are moved between the point of action below the spring 2 and the plate 31 of the first member 3. A recording apparatus in which the contact pressure of the pinch roller 5 with respect to the drive roller 7 is varied by different thicknesses of the plates 101 and 102.