JPH0732522Y2 - Conveying device for sheet body to outer peripheral surface of right cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention is suitable for a printing device such as a thermal transfer printing device that prints by pressing a recording sheet, which is a sheet, against a platen roller that is a right cylinder. The present invention relates to a conveying device for a sheet body to the outer peripheral surface of a right cylindrical body.

Prior Art FIG. 5 shows a platen roller 51 of a conventional thermal transfer type printer.
It is a side view which shows the structure relevant to. Chart paper to record
When 52 is guided by the guide members 53 and 54 and supplied to the platen roller 51, the recording paper 52 is pressed by the pressure roller 55 against the platen roller 51 and is conveyed by the frictional force with the platen roller 51. At this time, the leading end of the recording paper 52 may be conveyed while being inclined with respect to the axis of the platen roller 51.

When the recording paper 52 is further conveyed, the leading end of the recording paper 52 is
Positioning levers 56 are provided near both ends of the platen roller 51 and are in contact with the platen roller 51 by springs 57.
Abut one side. The positioning lever 56 is provided with a pin 58 so as not to swing due to the advancing force of the recording paper 52. When the platen roller 51 is further rotated in this state, the advancing force of the recording paper 52 is only the frictional force due to the pressing force of the pressure bonding roller 55, and slippage occurs between the recording paper 52 and the platen 51, causing the recording paper 52 to move. The tip contacts both positioning levers 56 and slips. That is, the leading end of the recording paper 52 is regulated by the positioning lever 56 by rotating the platen roller 51 for a predetermined period after the recording paper 52 is detected by the recording paper detecting means 59 realized by a micro switch or the like. , Is parallel to the axis of the platen roller 51.

After the leading end of the recording paper 52 is regulated by the above-described method, the positioning lever 56 is swung in the direction of the arrow 61 by the driving means 60, and the platen roller 51 is rotated, so that the recording paper 52 is recorded in the recording area 62. Transport to. In the recording area 62, the thermal head presses the ink film against the recording paper 52 on the platen roller 51 to perform printing.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the printing apparatus as described above, the tips of the pair of positioning levers 56 are pressed against the platen roller 51, and the tips of the recording paper 52 are attached to the step or contact portion formed near the tips. The recording paper 52 is conveyed by the rotational force of the platen roller 51 in the state of contacting the platen, and the positioning lever 56 is held until the leading end becomes parallel to the axis of the platen roller 51, thereby correcting the inclination of the recording paper 52. It is carried out.

When performing such an inclination correction operation, if the recording paper 52 is stiff and thick, the positioning lever 56 receives a force in the direction of separating from the platen roller 51 by the recording paper 52, whereby the positioning lever 56 moves in the direction of arrow 61. It sometimes rocked. If the platen roller 51 is strongly pressed to prevent the positioning lever 56 from swinging, the platen roller 51 is damaged.

An object of the present invention is to solve the above technical problems and to correct the inclination of the sheet body with a simple structure when the sheet body such as the recording paper is conveyed to the right cylinder body such as the platen roller. An object of the present invention is to provide a conveying device for a sheet body to the outer peripheral surface of a cylinder.

MEANS FOR SOLVING THE PROBLEMS The present invention is directed to a conveying means for conveying a sheet body toward the outer peripheral surface of a right cylindrical body, and a fixed position at a position downstream of the conveying means close to and apart from the outer peripheral surface of the right cylindrical body. A pair of guide members, a first position that is elastically abutted on the outer peripheral surface of the right cylindrical body at a position downstream of the guide member, and a first position from the outer peripheral surface of the right cylindrical body. A pair of positioning means displaceable to a second position displaced away from each other, and a drive means for switching the positioning means between the first position and the second position. It is a carrier device.

According to the present invention, the sheet body is conveyed toward the outer peripheral surface of the right cylindrical body by the conveying means, and is arranged at a fixed position at a position downstream of the conveying means, close to and apart from the outer peripheral surface of the right cylindrical body. The guide member is guided to the outer peripheral surface of the right cylindrical body. At this time, when the end portion of the sheet body on the conveying direction is inclined with respect to the axis of the right cylindrical body, the end portion of the sheet body contacts one of the pair of positioning means. The positioning means is in a first position in which the positioning means elastically contacts the outer peripheral surface of the right cylindrical body. When the sheet body is conveyed in this state, slippage occurs between the sheet body and the right cylindrical body, and the end portion of the sheet body also contacts the other positioning means.

In this way, the leading edge of the recording paper is regulated by the pair of positioning means and is parallel to the axis of the right cylindrical body. At this time, when the sheet body is stiff, thick, and stiff, the sheet body tries to separate from the outer peripheral surface of the right cylindrical body, but is regulated by the guide means so as to be close to the outer peripheral surface direction of the right cylindrical body. After that, the sheet member is conveyed on the outer peripheral surface of the straight cylindrical body by switching the positioning means to the second position which is displaced away from the outer peripheral surface of the right cylindrical body from the first position by the driving means.

Therefore, the inclination of the sheet body can be corrected with a relatively simple structure. By providing a guide member,
As described in the related art, it is not necessary to strongly press the positioning means against the outer peripheral surface of the right cylindrical body, and the right cylindrical body is prevented from being damaged.

Embodiment FIG. 1 is a side view showing the basic construction of a printer 12 having a sheet conveying position according to an embodiment of the present invention.
Recording paper 5 which is a sheet inserted between the guides 20 and 21
Is a paper feed roller 22 or 23 driven to rotate by a motor 15.
And is conveyed to the outer peripheral surface of the platen roller 7, which is a right cylindrical body, between the guides 40 and 41.

On the outer peripheral surface of the platen roller 7, pressure rollers 18a to 18f for pressing the recording paper 5 against the platen roller 7 and transporting the recording paper 5 on the outer peripheral surface of the platen roller 7 are provided.
A pair of positioning levers 30, which are swingable around a pin 31 as a fulcrum, are provided between the pressure-bonding rollers 18a and 18b so that their tip ends are pressed against the outer peripheral surface of the platen roller 7. On the same line on the downstream side of the positioning lever 30 in the transport direction, a pair of guide members 11 are provided between the platen roller 7 and the positioning lever 30 at appropriate intervals. A recording paper detection sensor 37 realized by a micro switch or the like is provided between the guide member 11 and the pressure roller 18a. The recording paper detection sensor 2 is also provided on the downstream side of the pressure roller 18b.
Six are provided.

The positioning lever 30 is pressed against the platen roller 7 by a spring 32, and a lever 35 swingable about a pin 34 is fitted by a pin 33. The lever 35 is connected to the cam 6, and the lever 35 is swung in response to the rotation of the cam 6 by the spiral groove provided in the cam 6, and thereby the positioning lever 30 is swung. The sheet body conveying device includes a pressure roller 18a to 18f as a conveying unit that conveys the recording sheet 5 that is a sheet toward the outer peripheral surface of the platen roller 7 that is a right cylinder, a guide member 11, and a positioning unit. It comprises a positioning lever 30 and a driving means including a cam 6, a motor 9, a spring 32 and a lever 35.

The recording paper 5 whose inclination is corrected by the above-mentioned sheet conveying device is conveyed by the pressure rollers 18b to 18d on the platen roller 7 which is rotationally driven by the motor 15, and printing is performed in the printing area 17. . The printing operation is performed by pressing the ink film 1 onto the recording paper 5 on the platen roller 7 by the thermal head 4 to thermally transfer the ink of the ink film 1.

The thermal head 4 is attached to a head holder 4a that can be angularly displaced about a shaft 4b.
The thermal head 4 is brought into contact with or separated from the platen roller 7 in conjunction with. The ink film 1 is the supply reel 2
The ink film 1 is wound around the take-up reel 3, and the take-up reel 3 is rotated by the motor 27 in synchronization with the printing operation to take up the ink film 1.

FIG. 2 is a plan view for explaining the tilt correction operation of the recording paper 5. The tilt correction operation of the recording paper 5 will be described with reference to FIGS. 1 and 2 described above. The recording paper 5 conveyed to the outer peripheral surface of the platen roller 7 is pressed by the pressure roller 18a against the platen roller 7 and is conveyed by the frictional force with the platen roller 7. At this time, the recording paper 5 is only laterally guided by a guide (not shown),
As shown in the figure, the leading end portion 10 of the recording paper 5 is a platen roller 7
There is a case that it is not parallel to the axis 19 of and is inclined at an angle. When the recording paper 5 is conveyed in this state, it advances between the guide 40 and the platen roller 7, and the positioning lever 30
Guide member 11 and platen roller 7 fixed on the same line as
Go between and. The guide member 11 is provided with an inclined surface 11a on the upstream side of the conveyance so that the recording paper 5 can be smoothly conveyed.

When the recording paper 5 is further conveyed, the left end portion 5L of the recording paper 5 contacts the contact portion 30a of the positioning lever 30. At this time, the positioning levers 30 and 30R are elastically positioned at the first position corresponding to the outer peripheral surface of the platen roller 7. The supply of the recording paper 5 is detected by the recording paper detection sensor 37, and after the detection, the platen roller 7 is rotated for a certain period. Left end 5L
Is regulated by the positioning lever 30, the recording paper 5
A slippage occurs between the platen roller 7 and the platen roller 7, the recording paper 5 is conveyed while slipping, and the right end portion 5R also has the positioning lever 30R.
Abut. As a result, the leading end 10 of the recording paper 5 becomes parallel to the axis 19 of the platen roller 7. After that, the positioning levers 30 and 30R are swung in the direction of arrow C to be positioned at a second position which is displaced further away from the outer peripheral surface of the platen roller 7 than the first position. The recording paper 5 is conveyed to the print area 17 and is printed as described above.

FIG. 3 is a side view for explaining the inclination correction operation of the recording paper 5. The case where the leading end of the recording paper 5 contacts the positioning lever 30 will be described in detail with reference to FIG. The recording paper 5 contacting the contact portion 30a of the positioning lever 30 produces a frictional force between the recording paper 5 and the platen roller 7 due to the pressure force of the pressure roller 18a, and the recording paper 5 is conveyed thereby. The leading edge of the recording paper 5 is regulated by the positioning lever 30 and slips. At this time, the platen roller 7 is attached to the recording paper 5.
The force that tries to separate from works. In particular, when the recording paper 5 is thick and stiff and has high rigidity, a relatively large force is exerted, but since the guide member 11 provided upstream of the positioning lever 30 in the transport direction receives the downward force, the positioning lever 30 The downward force exerted on is reduced. Therefore, unlike the prior art, it is not necessary to strongly press the positioning lever 30 against the platen roller 7, and the platen roller 7 is prevented from being damaged.

FIG. 4 is a block diagram showing the electrical configuration of the printer 12. The print information input means 38 implemented by a random access memory or the like provides print information to a control unit 39 implemented by a microcomputer or the like. The controller 39 prints with the thermal head 4 based on the print information. The thermal head 4 is pressed or separated from the platen roller 7 by driving the motor 9. At this time, in synchronization with the printing operation, the control unit 39 drives the motor 27 to convey the recording paper 5, and drives the motor 15 to wind up the ink film 1.

During the above-described inclination correction operation of the recording paper 5, the control unit 39 controls the motor 27 to convey or stop the recording paper 5 based on the detection signals from the recording paper detection sensors 26 and 37.
It also controls the motor 9 to displace the positioning lever 30.

As described above, according to this embodiment, the inclination of the recording paper 5 can be corrected with a relatively simple structure. Also a guide member
By providing 11, the downward force that acts on the positioning lever 30, that is, the force that attempts to separate the positioning lever 30 from the platen roller 7 can be reduced. As a result, the positioning lever 30 moves the platen roller 7
The spring force of the spring 32 for pressing the platen roller 7 can be reduced, and the platen roller 7 is prevented from being damaged by the positioning lever 30.

Although the printing apparatus has been described in the present embodiment, the present invention may be applied to a printing apparatus such as a video printer.

As described above, according to the present invention, the inclination of the sheet body can be relatively easily corrected before the sheet body is conveyed to the outer peripheral surface of the right cylindrical body. Further, by providing the guide member, it is not necessary to strongly press the positioning means against the right cylindrical body, and it is possible to prevent the outer peripheral surface of the right cylindrical body from being damaged by the positioning means.

[Brief description of drawings]

FIG. 1 is a side view showing the basic construction of a printing device 12 equipped with a sheet conveying device according to an embodiment of the present invention, and FIG. 2 is a plan view for explaining the inclination correction operation of the recording paper 5. , Third
The figure is a side view for explaining the inclination correction operation of the recording paper 5,
FIG. 4 is a block diagram showing an electrical configuration of the printing device 12 shown in FIG. 1, and FIG. 5 is a side view showing a configuration related to the platen roller 51 in the conventional printing device. 5 ... Recording paper, 6 ... Cam, 7 ... Platen roller, 9
...... Motor, 11 …… Guide member, 12 …… Printer, 18a to 1
8f …… Pressing roller, 30 …… Positioning lever, 31,33,34…
… Pin, 32 …… Spring, 35 …… Lever

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B65H 9/00 J

Claims (1)

[Scope of utility model registration request] 1. A conveying means for conveying a sheet body toward an outer peripheral surface of a right cylindrical body, and a pair disposed at a fixed position at a position downstream of the conveying means, close to and spaced from the outer peripheral surface of the right cylindrical body. Guide member, a first position downstream of the guide member that elastically contacts the outer peripheral surface of the straight cylindrical body, and a second position that is displaced further away from the outer peripheral surface of the right cylindrical body than the first position. An apparatus for conveying a sheet body to an outer peripheral surface of a right cylindrical body, comprising a pair of positioning means displaceable to a position and a driving means for switching the positioning means between a first position and a second position.