JPH0948543A - Recording medium retaining mechanism of recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the deformation of an elastic member with simple constitution enlarge the tenacity of recording paper and improve the accuracy in mounting of the elastic member by projecting the tip of the elastic member from a fixing member when the fixing member is fixed to the body. SOLUTION: In the case of retaining recording paper 5, a pressing plate 11 is separated from the frame 61 to begin with, and in this condition, the recording paper 5 is sent out until the tip abuts on an abutting plate 12, and then the pressing plate 11 is abutted on the frame 61. At this time, the top of the rubber material 16 projecting from the surface of the pressing plate 11 abuts on the recording paper 5, and presses this toward the frame 61. Hereby, the recording paper 5 is retained. At the start of recording operation, the recording paper 5 is pulled back to the recording start position, and further even if the force in the direction of pulling back the recording paper 5 is given, the rubber material 16 is retained, being fitted in the retaining hole of the pressing board 15, so the deformation of rubber material 16 is hard to occur. Hereby, the recording paper 5 is positioned always in the specified recording starting position by the pull back operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-time recording apparatus for performing multi-color recording by reciprocating a recording medium a plurality of times and superimposing recording performed at each movement. The present invention relates to a recording medium holding mechanism for positioning at a predetermined position.

[0002]

2. Description of the Related Art As a multi-time recording apparatus of this type, there is a thermal transfer recording apparatus for recording on a roll-shaped recording paper with multicolor ink sheets.
A first recording operation for recording the first color, a first retracting operation for retracting the recording paper to the recording start position after the first recording operation, and a second overlapping operation on the area where the first color recording is performed.
A second recording operation for recording a color, a second retracting operation for retracting the recording paper to the recording start position after the second recording operation, and subsequent third and fourth recording operations and a retracting operation are sequentially performed for one page. Is configured to record.

Since this type of multi-time recording apparatus is of a type that executes recording for each color and superimposes these, it is necessary to match the recording positions during the recording operation for each color. For this reason, in the conventional apparatus, an encoder is provided on the drive roller that conveys the recording paper, the pulses output by the encoder are counted to detect the movement amount of the recording paper, and the recording paper is pulled back by the moved amount. Was being aligned. Alternatively, a mark for position detection is formed in the margin of the recording paper, and the mark is read by a sensor to align the recording paper. However, in the method using the encoder, it is difficult to correct this when the recording sheet is skewed and pulled back, and in the method of reading the mark by the sensor, it is necessary to add a sensor mechanism, There has been a problem that complicated control must be performed in order to accurately position the recording paper.

Therefore, in the conventional recording apparatus, a recording medium holding mechanism for holding the leading end portion of the recording sheet is provided in the recording apparatus so that the recording sheet can be positioned at a predetermined recording start position by the pullback operation. FIG. 6 is a view showing the arrangement of a thermal transfer recording apparatus having this recording medium holding mechanism, which is composed of a recording sheet holding section 1, a thermal head mechanism 2, a platen roller 3, an ink sheet 4, a recording sheet 5, and a recording apparatus main body 6. ing. The platen roller 3 is rotatably supported by the recording apparatus main body, and the thermal head 2 is disposed so as to be pressed against and separated from the outer peripheral surface of the platen roller 3. A recording paper 5 and an ink sheet 4 are sequentially arranged from the platen roller 3 side in a recording paper conveyance path formed between the platen roller 3 and the thermal head 2. When recording is performed by this thermal transfer recording device,
The recording paper 5 and the ink sheet 4 are pressed against the platen roller 3 by the thermal head 2, and the recording paper 5 is conveyed by rotating the platen roller 3, and at the same time, the ink sheet 4 is wound around the ink sheet winding roll 42, and By selectively driving the heating resistor formed on the thermal head 2, the heat-meltable ink applied to the surface of the ink sheet 4 is transferred onto the recording paper 5 for recording. ing.

As shown in FIG. 7, the recording paper holding unit 1 is rotatable with respect to the recording apparatus main body so as to be selectively pressed against and separated from a frame 61 of the recording apparatus main body 6 which is a conveyance path of the recording paper 5. A press plate 11 provided on the press plate 11, a contact plate 12 attached to the press plate 11 for abutting and positioning the recording paper 5, and a first plate attached to the surface of the press plate 11 facing the frame 61. The rubber plate 13 and the second rubber plate 14 attached to the frame 61 are included.

Further, in the thermal transfer recording apparatus, in the case of recording a large number of times with ink sheets of a plurality of colors, first of all,
Before recording the color, the thermal head 2 is separated from the platen roller 3, and the pressing plate 11 is rotated to separate the first rubber plate 13 and the second rubber plate 14 from each other (see FIG. )). In this state, the recording paper 5 is pulled out, its leading end is brought into contact with the contact plate 12 of the recording paper holding portion 1, and the pressing plate 11 is rotated to move the first rubber plate 13 and the second rubber plate.
The recording paper is nipped by the rubber plate 14 and the pressing plate 11 is pressed against the frame 61 to position and hold the recording paper 5 (FIG. 7B). After that, the recording paper 5 is pulled back to the limit position and held as the recording start position, the ink sheet 4 is stacked on the recording paper 5 in this state, and the thermal head 2 is pressed against the platen roller 3. This completes the preparatory stage for recording.

In the first recording operation, the platen roller 3 is rotated to convey the recording paper 5, and at the same time, the ink sheet take-up roll 42 is rotated to rotate the ink sheet 4.
0 is wound up, and the heating resistor formed on the thermal head 2 is selectively driven to transfer the ink applied to the surface of the ink sheet 40 onto the recording paper 5 for recording. The ink sheet 40 after the transfer is wound up by the ink sheet winding roll 42, and the recording paper 5 is held at the end portion by the recording paper holding portion 1, so that a slack portion is formed on the recording paper conveyance path. When the first recording operation is completed, the thermal head 2 is separated from the platen roller 3, and the ink sheet 4 (that is, an ink sheet cassette (not shown) that holds the ink sheet supply roll 41 and the ink sheet take-up roll 42). Remove. Further, the recording paper 5 for which the recording of the first color has been completed is pulled back to the recording start position manually or by reversing the driving mechanism for conveying the recording paper, and the second color ink sheet 4 is set in the recording device. The thermal head 2 is pressed against the platen roller 3 to perform the second recording operation. After that, the recording paper is pulled back, the ink sheet is replaced, and the recording operation is sequentially performed to perform multi-color recording for one page.

[0008]

As shown in FIG. 7, the recording paper holding unit 1 in the above-described conventional recording apparatus is constructed by sticking a plate-shaped rubber material to a pressing plate with an adhesive material or the like. Therefore, when the recording paper 5 was pulled back, the following problems occurred. That is, as shown in FIG. 8, when the recording paper is pulled back while the pressing plate is pressed against the frame while sandwiching the recording paper, the rubber material is deformed so as to be distorted in the direction in which the recording paper is pulled back, and this deformation However, the recording start position is changed, and the recording position of each color is displaced, resulting in a problem that the quality of the recording result is significantly deteriorated. Further, when a plurality of elastic members, for example, semi-conical elastic members are attached to the pressing plate in a direction orthogonal to the recording paper conveyance direction to form a recording holding mechanism, the adhesive material is peeled off when the recording paper is pulled back. There was also a defect.

The present invention has been made in order to solve these problems, and it is possible to suppress the deformation of the elastic member of the recording medium holding mechanism with a simple structure and to increase the holding force of the recording paper to reduce the elasticity. An object of the present invention is to provide a recording device that can improve the mounting accuracy of members. Another object of the present invention is to provide a recording apparatus which has a simple structure and can stably maintain the state of holding the recording paper by the recording medium holding mechanism.

[0010]

In order to solve the above-mentioned problems, in the recording medium holding mechanism of the recording apparatus of the present invention,
The recording medium is composed of a plurality of elastic members that are pressed against the recording medium and hold it, and a fixing member that holds the elastic members and is fixed to the recording medium holding mechanism main body. The fixing member is fixed to the recording medium holding mechanism main body. At this time, the tip of the elastic member protrudes from the fixing member, and the protruding portion holds the recording medium. Further, the fixing member of the recording medium holding mechanism is composed of a plate-shaped member. Also, the main body of the recording medium holding mechanism is bent to form a fixing member of the recording medium holding mechanism. Further, a lever rotatably attached to the recording apparatus main body by a shaft, and one end rotatably attached to the lever by a first shaft and the other end rotatably attached to the recording medium holding mechanism main body by a second shaft. The arm member is provided, and the rotation of the lever is transmitted to the arm member to press the recording medium holding mechanism main body into and out of contact with the recording medium, and at the same time, to support the lever to the recording apparatus main body and the arm. The elastic member holds the recording medium in a state where the first and second shafts that support the member are positioned on a straight line.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The recording medium holding mechanism of the recording apparatus of the present invention will be described in detail below with reference to the drawings. 1 and 2 are explanatory views showing a recording medium holding mechanism of the present invention, in which the same components as those of the above-described conventional recording apparatus are designated by the same reference numerals. Further, the recording operation and the recording paper pullback operation in the recording apparatus adopting the recording medium holding mechanism of the present invention are the same as those in the above-mentioned conventional recording apparatus, and therefore detailed description will be omitted.

As shown in FIG. 1, a recording paper holding unit 1 as a recording medium holding mechanism includes a pressing plate 11 as a main body of the recording medium holding mechanism, an abutting plate 12, and a pressing plate 1 as a fixing member.
5, a rubber material 16 as an elastic member, and a screw 17. Further, the pressing plate 11 is configured to extend in the direction orthogonal to the conveying direction of the recording paper 5, that is, in the width direction of the recording paper 5, as in the above-described conventional recording apparatus, and the side formed on both ends thereof, respectively. The portion 111 is rotatably attached to the main body of the recording apparatus by being pivotally supported by a shaft 112, so that the portion 111 can be pressed against and separated from the frame 61. As shown in FIG. 2, the holding plate 15 has a plurality of holding holes 15 at a predetermined pitch in the longitudinal direction thereof.
1 is provided, and the rubber material 16 is held by fitting the rubber material 16 into the holding hole 151 and fixing it to the pressing plate 12 with the screw 17. That is, the rubber material 16 has a conical shape having a flat surface on the top thereof,
Further, the holding hole 151 of the pressing plate 15 is formed in a conical shape like the rubber material 16. In addition, this holding hole 151
When the rubber material 16 is fitted in the above, the top of the rubber material 16 is formed to project from the surface of the pressing plate 15.

In the recording medium holding mechanism of the present invention, when holding the recording paper 5, the pressing plate 11 is first separated from the frame 61, and the recording paper 5 is held in this state, as in the above-described conventional recording apparatus. It is sent out until the tip portion hits the contact plate 12, and then the pressing plate 11 is brought into pressure contact with the frame 61. At this time, the top of the rubber material 16 protruding from the surface of the pressing plate 11 contacts the recording paper 5 and presses it toward the frame 61. As a result, the recording paper 5 is held. When the recording operation is started, the recording paper 5 is pulled back to the recording start position, and even if a force is applied to the recording paper 5 in the pulling direction, the rubber material 16 holds the holding hole 15 of the pressing plate 15.
Since the rubber material 16 is hardly deformed because it is fitted and held in No. 1, the recording paper 5 is always positioned at the predetermined recording start position by the pullback operation, and problems such as color misregistration do not occur. In addition, the adhesive does not peel off unlike the conventional device.

FIG. 3 is a view showing a second embodiment of the recording medium holding mechanism of the present invention, and the constitution of the pressing plate 15 is different from that of the above-mentioned first embodiment. That is, in this embodiment, a holding hole 151 for fitting the rubber material 16 is formed in the pressing plate 11, the rubber material 16 is fitted in the holding hole 151, and then the pressing plate 11 is bent. It is configured to hold the rubber material 16. According to the second embodiment, it is possible to omit the pressing plate 15 and the screw 17 for fixing the pressing plate 15 to the pressing plate 11 in the first embodiment, and it is possible to reduce the number of parts. .

In this embodiment, a rubber material having a conical shape having a flat surface on its top is used.
For example, a rubber material having a hemispherical shape may be used, and the shape of the holding hole of the pressing plate may be a spherical shape, and the top portion of the holding material may protrude from the surface of the pressing plate when the rubber material is held. good.

FIG. 4 is a diagram showing a mechanism for pressing the recording medium holding mechanism main body of the present invention into and out of contact with the recording paper 5 (frame 61). In the drawing, 18 is pivotally supported by a shaft 181 and the recording apparatus. A lever 19 is rotatably attached to the main body, one end of which is pivotally supported by a first shaft 191 and is rotatably attached to the lever 18, and the other end of which is pivotally supported by a second shaft 192. The arm member is rotatably attached to the side portion 111 of the pressing plate 11. This lever 18, arm member 19 and pressing plate 11 are
81 and a shaft 112 are fixed as a link mechanism (so-called 4
This linkage) is configured.

In this embodiment, when holding the recording paper 5, first, as shown in FIG.
Rotate about 1 in the direction of A in the figure. As a result, the first shaft 191 of the arm member 19 rotates and moves in the A1 direction which is the same rotation direction as the A direction. Press plate 1 at the same time
1 receives the force from the arm member 19 and rotates and moves in the A2 direction around the shaft 112, and the elastic member 16 is moved to the frame 61.
Get away more. In this state, the leading edge of the recording paper 5 is sent to a predetermined holding position. Next, as shown in FIG. 4 (b), the lever 18 is rotated in the B direction in the figure, and thereby the pressing plate 11 is rotated and moved in the B2 direction, so that the elastic member 1
6 is pressed against the frame 61 via the recording paper 5. In this embodiment, as shown in FIG.
1, first axis 191 and second axis 1 of arm member 19
92 is aligned, ie lever 1
The link mechanism formed by 8, the arm member 19, and the pressing plate 11 is configured to hold the recording paper 5 in a state of being held at the dead point. As a result, when the arm member 19 is rotated and the first shaft 191 approaches the dead center during the recording paper holding operation, the angular velocity of the second shaft 192 approaches zero, so that the recording paper holding operation is performed stably. be able to. In addition, the holding force of the recording paper 5 can be maximized by configuring the elastic member 16 to undergo the maximum elastic deformation in this state.
Even if the reaction force (restoring force) of the elastic member 16 is received, since the link mechanism is held at the dead point, the arm member 19 and the lever 18 do not rotate, and the recording paper holding state is stable. The recording paper can be held without the need for a stopper member. Also, lever 1
8, by designing the size of the arm member 19 and the mounting positions of the shaft 181, the first shaft 191, the second shaft 192, and the shaft 112 to be appropriate values and positions, a force for rotating the lever 18 can be obtained. In comparison, the elastic member 16 presses (holds) the recording paper 5.
Since the force to be applied can be increased, the recording paper 5 can be held with a large force by rotating the lever 18 with a small force.

FIG. 5 is a view showing the second and third embodiments of the mechanism for pressing the recording medium holding mechanism main body against the recording paper 5 and separating them from each other, and FIG. The moving operation is performed by a solenoid engaged with the lever 18, and when the recording paper 5 is held, the solenoid is driven by a controller of a recording device (not shown) to drive the lever 1
8 is rotated to separate the pressing plate 11 from the frame 61, and the leading end portion of the recording paper 5 is sent to a predetermined holding position. Next, the solenoid is driven to rotate the lever 18 in the B direction in the figure, and thereby the pressing plate 11 is rotated and moved in the B2 direction to press the elastic member 16 against the frame 61 via the recording paper 5. FIG. 5B shows an example in which a drive motor controlled by the control device of the recording apparatus is used as the rotating operation means of the lever 18, and the lever 18 is provided with a rack that meshes with the drive motor. In the illustrated embodiment, the control device of the recording apparatus is configured to rotate the drive motor in the recording paper holding operation to rotate the lever 18 in the same manner as in the above-described embodiments. In the apparatus shown in FIG. 5, the recording paper holding operation can be automatically performed by the control device detecting the feed amount or the conveyance amount of the recording paper 5.

[0019]

As described in detail above, in the recording medium holding mechanism of the recording apparatus of the present invention, a plurality of elastic members which are pressed against the recording medium to hold the elastic members, and which hold the elastic members and hold the recording medium. A recording medium holding mechanism is constituted by a fixing member fixed to the mechanism main body, and when the fixing member is fixed to the recording medium holding mechanism main body, the tip of the elastic member protrudes from the fixing member, and recording is performed at this protruding portion. Since the medium is held, the deformation of the elastic member of the recording medium holding mechanism can be suppressed. Further, since a plurality of recording paper holding members are arranged in the width direction of the recording paper,
The pressing force on the recording paper is concentrated, and the holding force of the recording paper can be increased. Further, since the elastic member is configured to be fitted into the hole provided in the fixing member in advance to position the recording medium holding member, there is an effect that the mounting accuracy can be improved. A lever rotatably attached to the recording apparatus main body by a shaft, and one end rotatably attached to the lever by a first shaft and the other end rotatably attached to the recording medium holding mechanism main body by a second shaft. The arm member is provided, and the rotation of the lever is transmitted to the arm member to press the recording medium holding mechanism main body into and out of contact with the recording medium, and at the same time, to support the lever to the recording apparatus main body and the arm. Since the elastic member is configured to hold the recording medium in a state where the first and second shafts that support the member are aligned, it is possible to stably maintain the state of holding the recording paper and further to use the stopper. The recording paper can be held without requiring any member. Further, there is an effect that the recording paper can be held with a large force by an operation with a small force.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a recording medium holding mechanism of the present invention.

FIG. 2 is a perspective view showing a recording medium holding mechanism of the present invention.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a view showing a mechanism for pressing the recording medium holding mechanism main body of the present invention into and out of contact with the recording paper.

FIG. 5 is a diagram showing another embodiment of a mechanism for pressing the recording medium holding mechanism body of the present invention into and out of contact with the recording paper.

FIG. 6 is a diagram showing a configuration of a conventional recording apparatus.

FIG. 7 is a perspective view showing a conventional recording medium holding mechanism.

FIG. 8 is a diagram showing a conventional recording medium holding mechanism.

[Explanation of symbols]

 1 Recording Medium Holding Mechanism 2 Thermal Head Mechanism 3 Platen Roller 4 Ink Sheet 5 Recording Medium (Recording Paper) 6 Recording Device Main Body

Claims (4)

[Claims] 1. A recording means for forming an image on a conveyed recording medium, and a recording start position by the recording means when the recording medium on which the image is formed by the recording means is pulled back, coincides with a predetermined position. And a recording medium holding mechanism for holding the leading end portion of the recording medium, wherein the recording means performs recording a plurality of times on the recording medium, the recording medium holding mechanism presses the recording medium to press it. It comprises a plurality of elastic members to be held and a fixing member which holds the elastic members and is fixed to the main body of the recording medium holding mechanism, and the tip of the elastic member when the fixing members are fixed to the main body of the recording medium holding mechanism. A recording medium holding mechanism of a recording device, wherein the recording medium holding mechanism projects from the fixing member and holds the recording medium at the protruding portion. 2. The recording medium holding mechanism of the recording apparatus according to claim 1, wherein the fixing member of the recording medium holding mechanism is a plate-shaped member attached to the main body of the recording medium holding mechanism. 3. The recording medium holding mechanism of a recording apparatus according to claim 1, wherein the holding member of the recording medium holding mechanism is formed by bending a recording medium holding mechanism main body. 4. A plurality of elastic members which are pressed against a recording medium and hold the same, and a recording medium holding mechanism main body which holds the elastic members and is rotatably supported by a shaft with respect to the recording apparatus main body. When the fixing member is fixed to the main body of the recording medium holding mechanism, the tip of the elastic member protrudes from the fixing member, and the protruding portion holds the recording medium and is conveyed. A recording medium holding mechanism for holding the leading end portion of the recording medium so that the recording start position by the recording unit coincides with a predetermined position when the recording medium on which the image is formed is pulled back by the recording unit that forms an image on the recording medium. And a lever rotatably attached to the main body of the recording device by a shaft, and one end rotatably attached to the lever by a first shaft. An arm member rotatably attached to the recording medium holding mechanism main body by a second shaft, and transmitting the rotational movement of the lever to the arm member causes the recording medium holding mechanism main body to be a recording medium. First and second shafts for supporting the lever on the main body of the recording apparatus and for supporting the arm member while pressing them against each other and separating them from each other.
A recording medium holding mechanism of a recording device, wherein the elastic member holds the recording medium in a state where the axis of the recording medium is positioned on a straight line.