JPH0342446A - Recorder - Google Patents

Abstract

PURPOSE:To set a recording sheet to a platen simply and surely by mechanically interlocking a bail roller with a key switch so that it is pressed to the platen while the key switch is nonoperational and it is kept apart from the platen while the key switch is operational. CONSTITUTION:When a recording sheet 1 is to be set to a platen 2, a bail roller 8 is separated from the platen 2 by operating a key switch 9, and the platen 2 is rotated to feed the recording sheet 1. When the operation of the key switch 9 is stopped, the fed recording sheet 1 is pressed to the platen 2 by the bail roller 8, and the setting of the recording sheet 1 is completed. The recording sheet 1 can be simply set only by the action of the key switch 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a recording device, and particularly to a configuration in which a recording sheet is set on a platen in a recording device that performs recording by pressing a recording sheet onto a platen with a bail roller. It is related to.

[Prior Art] Conventionally, in recording apparatuses such as typewriters and printers, recording is performed by pressing a recording sheet, which is a recording sheet, onto a platen using a bail roller. The bail roller can be pressed against or separated from the platen by manual operation of a lever or the like. According to the conventional general configuration of such a recording apparatus, recording paper is set on the platen as follows.

That is, first the leading edge of the recording paper is placed between the platen and the feed roller (
The zero-order bail roller inserted between the pinch rollers is separated from the platen by manual operation, and in this state, the platen is rotated manually or automatically by a predetermined key operation to wind the recording paper around the platen and feed it. When the leading edge of the recording paper reaches an appropriate position, the bail roller is brought into pressure contact with the platen so as to overlap the leading edge of the recording paper, completing the setting.

[Problems to be Solved by the Invention] However, in the conventional configuration as described above, after inserting the recording paper to set the recording paper, an operation for separating the bail roller from the platen and an operation for rotating the platen are required. It is necessary to do both at the same time, which makes the operation cumbersome.

Also, there are cases where the user forgets to operate the bail roller during this setting. In that case, the recording paper gets caught on the bail roller and is bent or damaged.

Therefore, it may be possible to automatically move the bail roller away from and into pressure contact with the platen by driving a motor, solenoid, or the like. However, this poses a problem in that the cost of the drive source and drive mechanism for separating and pressing the bail rollers increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording apparatus of this type with a structure that is simple and inexpensive and allows recording sheets to be set on a platen easily and without any trouble.

[Means for Solving the Problems] In order to solve the above problems, according to the recording device of the present invention,
A platen, a bail roller movably disposed so as to press against or separate from the platen, and a key switch for inputting an instruction to feed a recording sheet by rotationally driving the platen, the bail roller It is configured to be mechanically interlocked with the key switch so as to be in pressure contact with the platen when the key switch is not being operated, and to be separated from the platen when the key switch is being operated.

[Function] According to such a configuration, when a recording sheet is set on the platen, by operating the key switch, the bail roller is separated from the platen, and the platen is rotationally driven to feed the recording sheet. Ru. Then, by ceasing to operate the key switch, the bail roller presses the fed recording sheet against the platen, completing the setting of the recording sheet. That is, recording sheets can be easily set simply by operating the key switch.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

1 and 2 illustrate the structure and operation of the main parts of a recording apparatus according to an embodiment of the present invention.

Here, a recording paper conveyance system is mainly shown as a main part of the recording apparatus. FIG. 1 shows the state immediately before operating the paper set key, which will be described later, to set recording paper on the platen, and FIG. 2 shows the state in which the paper set key is being operated and the paper setting operation is in progress.

In both figures, reference numeral 1 denotes a recording paper (hereinafter abbreviated as paper) which is a recording sheet.

Next, reference numeral 2 denotes a platen of the recording table which also serves as a paper feed roller for feeding the paper 1. Platen 2 is frame 1 of the recording device
The paper 1 is rotatably supported by a shaft relative to the paper 1, and is rotated by the drive of a motor 19 to feed the paper 1.

A paper pan 5 is provided near the lower side of the platen 2 for guiding the paper 1 along the lower outer periphery of the platen 2. A feed roller (pinch roller) 3.4 that presses the paper 1 against the platen 2 is rotatably supported on the paper pan 5.

Further, a card holder 12 is provided near the front side of the platen 2 to guide the paper 1 along the outer periphery of the platen 2.

Furthermore, a bail roller 8 is provided near the top of the card holder 12. The bail roller 8 is rotatably supported at the tip of the bail arm 7 by a shaft 8a. The pail arm 7 is rotatably provided to the frame 16 of the recording apparatus in directions 1 and b' in FIG. 1 with a shaft 7b as a rotation fulcrum. Furthermore, a torsion coil spring 6 is loaded between the rear end of the pale arm 7 and the frame 16, and this spring 6 urges the pale arm 7 in the direction b.

This bias causes the bail arm 7 to rotate in the b direction, so that the bail roller 8 comes into pressure contact with the outer periphery of the platen 2.

By the way, in the recording apparatus of this embodiment, a paper set key switch (hereinafter abbreviated as a set key) 9 shown on the left side of the figure is used as an operating means for the operator to set the paper 1 on the platen 2. provided on the operation unit or keyboard of the device. The set key 9 consists of a key top 9a, a key return spring 9c, and a switch body 9d. The key top 9a is supported by a key return spring 9c so as to be elastically movable up and down on the switch body 9d as shown by arrows c and c''.

The pale arm 7 is connected to the key top 9a of the set key 9 via a link lever 10. That is, the left end portion of the link lever 10 bent into a letter 1 shape in the figure is rotatably supported by a pin 9b protruding from the key top 9a. A straight long hole 10a is formed at the right end of the link lever 10 in the figure, and a pin 7a protruding from the pale arm 7 is slidably fitted into this long hole 10a. Due to such a movable connection, the key top 9a, link lever 10, and pale arm 7 constitute a link mechanism.

On the other hand, the switch body 9d of the set key 9 is connected to a CPU 17 of a control section comprising a microprocessor element or the like that controls the entire recording apparatus. The CPU 17 controls the drive of the motor 19 via the motor drive circuit 18. The motor drive circuit 18 is composed of power transistors and the like depending on the type of motor 19. It is assumed that the CPU 17 drives the motor 19 to rotate by a predetermined amount via the motor drive circuit 18 when an ON signal is input from the switch body 9d. In this case, the amount of rotation of the motor 19 is equal to the amount of rotation required to convey the paper 1 whose leading edge is inserted between the platen 2 and the feed roller 4 to the setting position shown in FIG. 2, as shown in FIG. do.

On the other hand, the reference numeral 13 in the figure is a carriage. A ribbon cassette 14 containing an ink ribbon as a recording material is removably mounted on the carriage 13, and a recording head 15 (for example, a wire dot head, a daisy wheel printing hammer, etc.) that performs recording using the ink ribbon is mounted on the carriage 13. is installed. During recording, the carriage 13 travels along the platen 2, the recording head 15 is driven, and recording is performed in a serial manner.

Next, the setting operation of the recording paper 1 with the above configuration will be explained below.

First, in the initial state before setting the paper 1, the set key 9 is not operated, the bail arm 7 is rotated in the direction b by the bias of the spring 6, and the bail roller 8 is rotated as shown in FIG. It is in pressure contact with platen 2. The motor 19 is not rotationally driven, and the platen 2 is stopped.

To set the paper 1 from this state, first insert the leading edge of the paper 1 between the platen 2 and the feed roller 4 from behind the platen 2, as shown in FIG.

Next, move the key top 9a of the set key 9 to arrow C' in FIG.
Press as shown. As the key top 9a descends, the bail arm 7 is pulled via the link lever 10, rotates in the direction of arrow b' as shown in FIG. 2 against the biasing force of the spring 6, and the bail roller 8 Separate from 2.

Further, when the switch body 9d is turned on by pressing the key top 9a, and the on signal is input to the CPU 17, the CPU
U17 rotates the motor 19 by a predetermined amount via the motor drive circuit 18 as described above. As a result, the platen 2 rotates by a predetermined amount in the direction a in FIG. 2, and the paper 1 is fed from the position shown in FIG. 1 to the position shown in FIG. and the second
It is assumed that the motor 19 is stopped and the platen 2 is stopped in the state shown in the figure.

From this state, the key top 9 that was being pressed by the operator
By releasing a, the key top 9a rises due to the spring force of the key return spring 9c and returns to the initial position shown in FIG. Then, the bail roller 8 presses the leading end of the paper 1 onto the platen 2. In this way, setting of paper 1 is completed.

During recording after the sheet 1 has been set, the carriage 13 moves as described above, the recording head 15 is driven, and recording is performed on the sheet 1 on the platen 2.

According to this embodiment as described above, the set key 9 can be used to commonly perform operations for separating and pressing the bail roller 8 against the platen 2 as well as operations for rotating the platen 2 by a predetermined amount. Operation for operation can be performed extremely simply by operating the set key 9.

In addition, the bail roller 8 is interlocked with the key top 9a of the set key 9 in an mtli manner, and is moved away from or in pressure contact with the platen 2 by operating the key top 9a. Can perform separation and pressure welding operations. It is not necessary to use an expensive driving source, and the recording apparatus can be configured at a lower cost.

Further, according to this embodiment, the operation for separating the bail rollers is not forgotten, unlike the conventional case where the operation for rotating the platen and the operation for separating the bail rollers are performed separately. Therefore, the sheet setting operation can be performed reliably without any trouble.

In addition, in the above configuration, the key top 9 of the set key 9
Even if the key top 9a is pressed with a normal pressing force, the key top 9a is slightly displaced, but the switch body 9d is not turned on, and the switch body 9d is configured so that it is turned on only when the key top 9a is pressed down with a strong pressing blade. Good too. In this way, when the key top 9a is pressed down with a normal push-down blade, the bail roller 8 only moves away from the platen 2 and the paper 1 is not fed, and the paper 1 is fed only after the key top 9a is strongly pressed down. It becomes like this. This configuration has the advantage that the paper setting operation and the operation of simply separating the bail roller 8 from the platen 2 can be distinguished by the pressing blade of the key top 9a.

[Effects of the Invention] As is clear from the above description, according to the recording apparatus of the present invention, a platen, a bail roller movably provided so as to press against or separate from the platen, and recording by rotationally driving the platen. The bail roller is mechanically interlocked with the key switch and is in pressure contact with the platen when the key switch is not operated. Since the inside is configured to be separated from the platen, recording sheets can be set on the platen extremely easily and reliably by simply operating the key switch mentioned above, improving the operability of the recording device and also allowing the bail roller to be placed on the platen. On the other hand, there is no need to provide a drive source for automatic fishing, and excellent effects such as being able to configure the recording device at low cost can be obtained.

[Brief explanation of drawings]

1 and 2 are cutaway side views of the main parts of the recording device before and during operation of the set key, respectively, for explaining the structure and operation of the main parts related to the present invention of the recording device according to the embodiment of the present invention. be. 1... Recording paper 2... Platen 3.4...
・Feed roller 6...Torsion coil spring 7...Pail arm 8...Bail roller 9...
・Set key 10...Link lever 13...
Carriage 14... Ribbon cassette 15... Recording head 17... CPU 18... Motor drive circuit 19... Motor

Claims (1)

[Claims] 1) A platen, a bail roller movably provided so as to press against or separate from the platen, and a key switch for inputting an instruction to feed a recording sheet by rotationally driving the platen; A recording apparatus characterized in that the bail roller is mechanically interlocked with the key switch so as to be in pressure contact with the platen when the key switch is not being operated, and to be separated from the platen when the key switch is being operated.