JPH0687353U - Recording device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a guide structure for guiding the recording paper to the recording paper transport mechanism. [Structure] The driven roller 51 of the recording paper transport mechanism 61 is
The driven roller 5 is mounted on a driven roller arm 53 that is rotatable around a rotation shaft 52, and a leaf spring 54 urges a leaf spring abutting portion 55 of the driven roller arm 53 upward, whereby the driven roller 5 is moved.
1 is pressed against the paper feeding / discharging roller 24. This leaf spring 5
4 has its bottom face opposed to the guide surface of the paper discharge guide plate 32 and has one end fixed to the upper guide plate 56 of the paper discharge path, and the leaf spring contact portion 55 of the driven roller arm 53 is attached upward. By urging, it has a downwardly curved shape. Since the leaf spring 54 is mounted on the upper portion of the conveying path while curving downward as described above, the conveyed recording paper can be guided between the paper feeding / discharging roller 24 and the driven roller 51.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a recording apparatus having a recording paper conveyance mechanism that conveys recording paper on a conveyance path.

[0002]

[Prior art]

 A printer, a copier, or the like has a recording paper transport mechanism for transporting the recording paper in the apparatus, and includes a transport roller that transports the recording paper and a recording roller and a transport roller that are pressed against the transport roller. It is generally composed of a driven roller that applies frictional force between them. As a method of pressing the driven roller against the conveying roller, a recording paper conveying mechanism 101 having a structure shown in FIG. 6 is known.

In FIG. 1, the carrying roller 102 is composed of a high friction elastic member fixed to the carrying roller shaft 102A, and the carrying roller shaft 102A is mounted on the left and right frames 103 and rotated by a drive mechanism (not shown). Further, the driven roller 104 is fixed to the driven roller shaft 104A inserted into the elongated holes 105 provided in the left and right frames 103, and is rotated by the rotation of the transport roller 102. Further, the left and right tip ends of the driven roller shaft 104A project from the elongated holes 105 of the left and right frames 103, and are urged downward by the coil springs 107 hooked on the spring hooks 106 of the left and right frames 103. It In this way, the left and right end portions of the driven roller shaft 104A are urged downward, so that the driven roller 104 presses the transport roller 102. A guide guide plate 108 is provided in the conveyance path along which the recording paper is conveyed, and the recording paper is conveyed on the paper ejection guide plate 108. The carrying roller shaft 102A is provided below the guide guide plate 108, and the uppermost part of the carrying roller 102 projects from a hole 108A provided in the guide guide plate 108 and contacts the driven roller 104. Contact.

Further, as another conventional example, a recording paper conveying mechanism 111 as shown in FIG. 7 is known. In the figure, the driven roller 114 is rotatably attached to the driven roller arm 113. The driven roller arm 113 is attached to a driven roller arm mounting member 113B fixed to an upper regulating plate 116 of the recording paper conveyance path so as to be rotatable about a rotation shaft 113A. Further, the driven roller arm 113 is urged downward by the torsion coil spring 115 mounted on the rotating shaft 113A of the driven roller arm 113, and the urged force causes the driven roller 114 to press the conveyance roller 112. The transport roller shaft 112A on which the transport roller 112 is mounted is provided below a guide guide plate (not shown) similarly to the above-described transport mechanism unit 101, but the uppermost part of the transport roller 112 is the guide guide plate. It projects above the guide surface (the surface of the guide guide plate that conveys the recording paper) and abuts on the driven roller 114.

[0005]

[Problems to be solved by the device]

 By the way, in order to stably convey the recording paper to the recording paper conveyance mechanism section, an upper regulation plate for regulating the upper portion of the recording paper conveyance path is provided. The upper regulation member guides the leading edge of the recording paper between the conveyance roller and the driven roller while regulating the upper end of the recording paper in the conveyance path. Further, since the recording paper conveyance mechanism section 111 has a structure in which the driven roller 114 is attached by cutting out a part of the upper regulating plate 116, an upper regulating member for regulating the upper portion of the notched portion is provided. You will need it. As described above, in any of the above-described recording paper conveyance mechanism units 101 and 111, the member for controlling the upper part is required in addition to the recording paper conveyance mechanism unit, so that the number of parts is increased and the parts cost is high. There was a problem such as becoming.

Therefore, the present invention has been made in view of the above points, and aims at reducing the number of parts of the recording apparatus by providing a guide structure for guiding the recording paper to the recording paper conveyance mechanism. It is a thing.

[0007]

[Means for Solving the Problems]

 As a means for achieving the above object, the present invention forms a transport roller for transporting a recording sheet, a driven roller pressed by the transport roller, and a transport path for transporting the recording sheet, as well as forming the recording sheet. A guide member that guides the recording sheet between the conveying roller and the driven roller, and conveys the recording sheet by pressing the driven roller against the conveying roller to apply a frictional force between the conveying roller and the recording sheet. The recording apparatus includes a plate-like elastic member for applying a pressing force to the driven roller, and the plate-like elastic member is mounted in the conveyance path with one surface thereof facing the guide surface of the guide member. The present invention aims to provide a recording device characterized by the above.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings together with a recording apparatus equipped with a recording paper conveying mechanism. First, a recording apparatus having the recording paper conveyance mechanism of this embodiment will be described. FIG. 1 is an external perspective view of a recording apparatus having a recording paper conveyance mechanism according to an embodiment of the present invention. In FIG. 1, the recording apparatus 1 has a recording paper storage unit 2 for storing cut recording paper (hereinafter, simply referred to as recording paper) fixed to the front of the main body, and is stored in the recording paper storage unit 2. The recording paper is reciprocated, and the color inks sequentially applied to the transfer paper are sequentially recorded according to the desired recording information, and when the recording operation is completed, the recording paper storage unit 2 is ejected from the paper discharge port 19A. The paper is ejected onto the upper paper ejection tray 19 by the recording paper conveyance mechanism section.

Next, the internal structure of the recording apparatus 1 will be described with reference to FIGS. In FIG. 3, reference numeral 2 is the recording paper storage unit 2 for storing the recording paper 2A, and is a recording paper for returning the recording paper 2A to the initial recording position when the recording paper 2A is reciprocated during the recording operation. It is also a space to evacuate 2A.

Reference numeral 10 denotes a thermal head mechanism unit 10 having a thermal head 12 mounted thereon, which is rotatably installed around a rotary shaft 10A. When the thermal head mechanism unit 10 rotates, the thermal head 12 is retracted from the platen roller 13 (not shown) and a set position for setting the thermal head 12 at a position slightly apart from the platen roller 13 (see FIG. 3). Can be moved to the position) shown in. The thermal head 12 is pressed against the platen roller 13 by a mechanism (not shown). Reference numeral 13 denotes a platen roller 13 in which an elastic member such as rubber is fixed to roller shafts rotatably mounted on the left and right frames of the recording apparatus 1. The recording paper 2A is reciprocated during recording operation, and recording is completed. The paper 2A is conveyed onto the discharge guide plate 32. Reference numeral 14 is the transfer paper 14 wound around transfer paper rolls 14A and 14B in the longitudinal direction. The thermal head 12 is pressed against the recording paper 2A wound around the platen roller 13 via the transfer paper 14, so that the color ink applied to the transfer paper 14 is recorded on the recording paper 2A. It Reference numeral 20 denotes a clamper mechanism 20 for clamping the leading end of the recording paper 2A, which comprises a movable clamp member 20A rotatable about a rotary shaft 21 and a fixed clamp member 20B fixed to the recording apparatus 1. The movable clamp member 20A is driven by a drive mechanism (not shown).

Reference numeral 22 denotes a paper feed lever 22 for moving the bottom plate 3 of the recording paper storage unit 2 up and down, and is rotatably provided around a shaft 22A. The paper feed lever 22 rotates in the direction of arrow 23 when the protrusion 22B is pushed leftward in the figure by a drive mechanism (not shown) (for example, a drive mechanism using a motor as a drive source). By rotating the paper feed lever 22 in this manner, the bottom plate 3 of the recording paper storage unit 2 rotates about a rotation shaft (not shown), and the front end 3A of the bottom plate 3 rises. Further, when the front end 3A of the bottom plate 3 is raised most, the paper feed lever 22 is rotated in the direction opposite to the arrow 23, and the bottom plate 3 of the recording paper storage unit 2 is lowered by its own weight. By rotating the paper feed lever 22 in this manner, the bottom plate 3 moves up and down. Reference numeral 24 denotes a paper feed / discharge roller 24 fixed to a paper feed / discharge roller shaft 24A that is rotatably supported, and is made of a high friction member such as rubber. Reference numeral 30 denotes a separation mechanism unit 30 for separating one stacked recording paper 2A. Separation pin levers 7R and L rotatably attached by shafts 6R and L and the stacked recording paper 2A are separated from each other. The separation pins 8R and L to be performed and the stopper pins 11R and L for restricting the separation pin levers 7R and L downward.

Reference numeral 31 is a paper feed guide plate 31 forming a paper feed path for guiding the recording paper 2 A separated by the separation mechanism unit 30 to the platen roller 13. Reference numeral 32 denotes a paper discharge guide plate 32 that forms a paper discharge path for guiding the recorded recording paper 2A to the paper discharge port 19A, and is provided on both ends of the recording paper 2A when the recording paper 2A is fed. It has a notch 32A for avoiding the generated bending (see FIG. 2). As described above, the conveyance path of the recording paper 2A in the recording apparatus 1 is folded back by the platen roller 13 and has a substantially V shape.

Reference numeral 51 denotes a driven roller 51 that presses the paper feeding / discharging roller 24. By pressing the paper feeding / discharging roller 24, a conveying force can be applied to the paper feeding / discharging roller 24. Then, the paper feeding / discharging roller 24 and the driven roller 54 constitute a recording paper conveying mechanism section 61. Here, the recording paper carrying mechanism 61 will be described with reference to FIG. In FIG. 2, the paper feed / discharge roller shaft 24A has a pulley 25 fixed to the outside of the right side surface 4R of the recording paper storage frame 4, and is directly connected to a platen roller drive system by a timing belt 26. As the pulley 25 rotates, the paper feeding / discharging roller 24 fixed to the paper feeding / discharging roller shaft 24A rotates. The driven roller 51 that presses the paper feeding / discharging roller 24 is mounted on a driven roller arm 53 that is rotatable about a rotation shaft 52. On the lower surface of the other end of the driven roller arm 53, a leaf spring contact portion 55 with which the leaf spring 54 abuts is provided. The leaf spring abutting portion 55 is urged upward by the leaf spring 54 mounted on the upper regulating plate 56 of the sheet discharge path, so that the driven roller 51 is pressed against the sheet feeding / discharging roller 24. Become. By the way, the leaf spring 54 is an elastic member made of metal, plastic resin, or the like, and as shown in FIG. 3, one of the leaf springs 54 has one bottom face 54A facing the guide surface 32B of the paper discharge guide plate 32. The end is fixed to the upper guide plate 56 of the paper discharge path, and the leaf spring abutting portion 55 of the driven roller arm 53 is biased upward, so that the shape is bent downward.

Next, the operation of the recording apparatus 1 will be described with reference to FIGS. 4 and 5. When an operation for a paper feeding operation is performed from the state shown in FIG. 3, the paper feeding lever 22 is rotated upward by a drive mechanism (not shown), and the bottom plate 3 of the recording paper storage unit 2 is raised. The bottom plate 3 is raised until the uppermost portion of the stacked recording papers 2A comes into contact with the paper feeding / discharging roller 24. Further, as the bottom plate 3 rises, the uppermost recording paper 2A pushes up the separation pins 8R and 8L of the separation mechanism 30, and the state shown in FIG. 4 is obtained. Further, the movable clamp member 20A is rotated around the rotation shaft 21 by the drive mechanism in the clockwise direction and stopped at a predetermined position, and the thermal head 12 is slightly separated from the platen roller 13. It becomes the set position.

From the above-described state, when the paper feeding / discharging roller 24 rotates counterclockwise, the uppermost recording paper 2A that is in contact with the paper feeding / discharging roller 24 is pushed to the platen roller 13 side. Both sides of the leading end of the recording paper 2A are in contact with the leading ends of the separation pin levers 7R and 7L, so that both sides are bent. The uppermost recording sheet 2A is fed while the deflection is further increased by the rotation of the sheet feeding / discharging roller 24, but the deflection is avoided by the notch 32A of the sheet ejection guide plate 32, and the recording sheet 2A is repelled. Due to the force, the leading end of the recording paper 2A is disengaged from the separation pins 8R and L. The recording paper 2A separated by separating from the separation pins 8R and 8L is conveyed on the paper feed guide plate 31 by the paper supply / discharge rollers 24. The recording paper 2A conveyed on the paper feed guide plate 31 is conveyed along the peripheral surface of the platen roller 13, passes between the thermal heads 12, and reaches the stopper portion 20C of the movable clamp member 20A. When the leading end of the recording paper 2A reaches the stopper portion 20C of the movable clamp member 20A, a detection device (not shown) installed on the movable clamp member 20A detects it and the rotation of the paper feed / discharge roller 24 is detected. When stopped, the movable clamp member 20A rotates to the clamp position to clamp the leading end of the recording paper 2A.

When the leading end of the recording paper 2A is clamped, the thermal head 12 is pressed against the platen roller 13 as shown in FIG. 5, and the recording paper 2A is moved between the platen roller 13 and the clamper mechanism section 20. The recording ink is reciprocated while being loosened, and the color inks on the transfer paper 14 are sequentially recorded on the recording paper 2A to perform the recording operation. When the recording operation is completed, the movable clamp member 20A is rotated to the retracted position shown in FIG. 4, the leading edge of the recording paper 2A is disengaged from the clamp mechanism portion 20, and is conveyed by the platen roller 13 in the direction of the paper discharge port 19A. . Here, as described above, since the conveyance path of the recording paper 2A has a substantially V shape folded back by the platen roller 13, the leading end of the recording paper 2A is restored so that the recording paper 2A tends to be flat. The force tries to move upward in the paper ejection path. However, the upper guide plate 56 provided at the upper part of the paper discharge path regulates the upper direction, and the leaf spring 54 provided at the downstream part of the upper guide plate 56 moves the recording paper 2A toward the paper discharge port 19A. I will guide you to. When the recording paper 2A is further conveyed, both ends of the recording paper 2A are bent by its own weight when passing through the cutout portion 32A of the paper discharge guide plate 32, and the central portion of the leading end of the recording paper 2A rises. However, since the leaf spring 54 is mounted in the central portion of this conveyance path while curving downward, the rising of the central portion of the leading end of the recording paper 2A is restricted, and the central portion of the leading end of the recording paper 2A is fed and discharged. It guides between the paper roller 24 and the driven roller 51. The recording paper 2A guided to the recording paper conveyance mechanism 61 in this manner is ejected to the outside by the rotation of the paper supply / ejection roller 24 of the recording paper conveyance mechanism 61.

As described above, the recording apparatus 1 according to the present embodiment has a structure for guiding the recording paper 2A to the recording paper transporting mechanism unit 61 by using the driven roller 51 of the recording paper transporting mechanism unit 61 as the paper feeding / discharging roller. Since the leaf spring 54 that presses against 24 is used, it is possible to reduce the number of parts and cost of the recording paper transport mechanism 61 and to perform stable paper discharge operation.

The driven roller 51 in the recording apparatus 1 is mounted on the driven roller arm 53, but may be mounted directly on the plate-like elastic member. That is, in the above-described embodiment, the rotation axis of the driven roller 51 is provided on the tip end portion (the end opposite to the fixed end) of the leaf spring 54 to mount the driven roller 51, and the leaf spring 54 is attached to the bottom portion 54A. If it is mounted so as to face the guide surface 32A of the paper discharge guide plate 32, the driven roller arm 53 is also unnecessary, and the number of parts can be further reduced.

[0019]

[Effect of device]

 As described above, according to the recording apparatus of the present invention, the conveying roller for conveying the recording sheet, the driven roller pressed by the conveying roller, the conveying path for conveying the recording sheet, and the recording sheet are formed. A guide member for guiding the sheet between the conveying roller and the driven roller, and presses the driven roller against the conveying roller to apply a frictional force between the conveying roller and the recording sheet to convey the recording sheet. In the recording apparatus, a plate-shaped elastic member for applying a pressing force to the driven roller is provided, and one surface of the plate-shaped elastic member is mounted in the conveyance path so as to face the guide surface of the guide member. The plate-like elastic member can be used as a part of the regulating member of the recording paper. For this reason, the number of parts of the recording apparatus, particularly the number of parts of the mechanism section for conveying the recording paper can be reduced.

[Brief description of drawings]

FIG. 1 is an external perspective view of a recording apparatus having a recording paper conveyance mechanism according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining a recording paper conveyance mechanism that is an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view of a main part of the recording apparatus 1 (immediately after recording paper is stored).

FIG. 4 is a vertical cross-sectional view of a main part of the recording apparatus 1 (when recording paper is fed).

FIG. 5 is a vertical cross-sectional view of a main part of the recording apparatus 1 (during recording paper operation).

FIG. 6 is a perspective view showing an example of a structure of a conventional recording paper conveyance mechanism.

FIG. 7 is a perspective view showing another example of the structure of a conventional recording paper transport mechanism.

[Explanation of symbols]

 1 Recording Device 2 Recording Paper Storage 2A Recording Paper 3 Bottom Plate 4R, L Recording Paper Storage Frame 5R, L Width Regulator 7R, L Separation Pin Lever 8R, L Separation Pin 10 Thermal Head Mechanism 11R, L Stopper Pin 12 Thermal Head 13 Platen Roller 14 Transfer Paper 14A, B Transfer Paper Roll 20 Clamper Mechanism 20A Movable Clamper 20B Fixed Clamper 22 Paper Feed Lever 24 Paper Ejection Roller (Conveyor Roller) 30 Separation Mechanism 31 Paper Feed Guide Plate 32 Paper Ejection Guide Plate (Guide) Member) 32A Guide surface (guide surface) 51 Driven roller 52 Rotating shaft 53 Driven roller arm 54 Leaf spring (plate-like elastic member) 55 Leaf spring contact portion 56 Upper regulation plate 61 Recording paper transport mechanism section

Claims (1)

[Scope of utility model registration request] 1. A conveying roller for conveying a recording sheet, a driven roller pressed against the conveying roller, a conveying path for conveying the recording sheet, and a recording sheet between the conveying roller and the driven roller. And a guide member for guiding
In a recording apparatus that presses the driven roller against the conveying roller to apply a frictional force between the conveying roller and the recording sheet to convey the recording sheet, a plate-like elastic member for applying a pressing force to the driven roller. A recording apparatus, comprising: a plate-like elastic member, the one surface of which is opposed to a guide surface of the guide member and which is mounted in the conveyance path.