JPS6398451A - Recorder - Google Patents

Abstract

PURPOSE:To enable easy and appropriate loading of a thermal recording paper and perform appropriate printing, by a construction wherein a platen roller separated from a thermal head at a closed position of platen roller separated from a thermal head at a closed position of a support member can be pressed against the thermal head by moving a cover to a closed position. CONSTITUTION:A support member 6 and a cover 9 are set into opened positions, a roll of thermal paper P is loaded into a holder 6a, and then the support member 6 is turned to the side of a closed position. In this case, the thermal paper P can be easily inserted into the holder 6a from one side of the member 6 (arrow B). At the closed position of the cover 9, a platen roller 8 is elastically pressed against a thermal head 2 by an engaging part 9a so as to correct the overhang of the head 2 against an elastic force of a spring 4, whereby an appropriate and fixed pressure is generated between the platen roller 8 and the thermal head 2. Consequently, appropriate printing can be performed on the thermal recording paper P inserted between the platen roller 8 and the thermal head 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording device that prints on thermal paper, and particularly to a structure for loading the roller-shaped thermal paper into the main body of the device.

[Prior art and problems to be solved by the invention] This type of device includes, for example, a barcode thermal printer used for printing price tags on products, which includes a thermal head fixed to the main body of the device and a platen roller that presses the thermal head. Predetermined printing is performed while the thermal paper fed out from the roll is passed between the two. In conventional devices, when loading this thermal paper, the thermal paper is first set inside the main body of the device, and then inserted from one end between the thermal head and the platen roller. However, in this case, it is necessary to resist the elasticity of the platen roller that presses the thermal head, to create an appropriate gap between the two, and then insert the thermal paper into that gap. At this time, it is necessary to prevent damage to the thermal paper. Therefore, it is necessary to avoid interference with other components around the thermal head, and such loading work is extremely complicated and requires careful attention. Further, if the thermal head itself is rotatably attached to the main body of the apparatus so as to be separated from the platen roller, and a sufficient gap is secured between the two, the structure becomes complicated.

Furthermore, in any case, when loading is completed, the platen roller presses the thermal head, but since the head is fixed at a predetermined position in the main body of the apparatus, such pressure may be removed due to wear of the support shaft of the platen roller, etc. There was also a problem that the pressure changed, which hindered proper printing.

In view of the above circumstances, it is an object of the present invention to provide a recording device that can easily and accurately load thermal paper, and can perform proper printing for this type of device.

[Means and operations for solving the problems] A recording device according to the present invention has a thermal head which is supported by a main body in an overhanging state while being pressed by a spring, and a thermal paper holder, one end of which is supported by a main body in an overhanging state. a support member pivotally connected to the apparatus main body so as to be openable and closable; a platen roller rotatably supported at the other end of the support member such that it can be separated from and rotatably relative to the thermal head when the support member is in the closed position; a cover having an engaging piece that is pivotally mounted coaxially with the supporting member on the main body and that in the closed position engages with the support shaft of the platen roller to press the platen roller toward the thermal head; and these supporting members. and a hook for retaining the cover in its closed position. Therefore, when loading thermal paper, first the thermal paper is attached to the support member in the open position via its holder, and then the paper is moved to the closed position. In this case, the thermal paper can be easily installed in the open position of the support member, ie, outside the main body of the device. In the support member moved to the closed position, the platen roller is separated from the thermal head, but by moving the cover to the closed position, the platen roller presses the thermal head with the thermal paper sandwiched between them. This state is maintained by the rear hook, and the thermal paper loading operation is completed easily and reliably.

〔Example〕

Hereinafter, a first embodiment of the recording apparatus of the present invention will be described based on FIGS. 1 to 3. In the figures, 1 is a main body of the apparatus in which a control circuit (not shown) is placed, and 2 is a bracket 2.
The thermal head is pivotally supported on the main body 1 by a shaft 3 via a, 4 is a spring that presses the thermal head 2 in the overhang direction (in the direction of the arrow), and 5 is the main body 1 that regulates the position of the overhanging thermal head. A slot (see Fig. 2) provided on the side, 6, has one end pivoted to the main body 1 via a shaft 7 so that it can be opened and closed, and allows the roll-shaped thermal paper P to be freely rotated. Supporting holder 6
A support member 8 is rotatably supported via a shaft 8a into a long hole 6b formed in the longitudinal direction at the other end of the support member 6, and when the support member 6 is in the closed position (see FIG. 2). A platen roller 9 capable of defining an appropriate gap g between it and the thermal head 2 has one end pivotally connected to the main body 1 via a shaft 7 so as to be openable and closable, and the other end in its closed position (see FIG. 3). ), a cover 10 is formed with a retaining portion 9a that abuts the shaft 8a from the front and presses the platen roller 8 against the thermal head 2 in the closed position.
1 and having a release lever 10a;
A spring 12 imparts a left-handed rotation behavior to the hook 10 in FIG. 1, and a spring 13 presses the shaft 13 which is loosely fitted into the elongated hole 1a, supported by the main body 1, and capable of engaging with the hook 10 when the cover 9 is in the closed position. It's a spring.

Since the recording apparatus according to the present invention is constructed as described above, first, the support member 6 and the cover 9 are placed in the open position as shown in FIG. , the support member 6 is rotated toward the closed position. In this case, the thermal paper P can be easily inserted into the holder 6a from the side of the support member 6 (arrow B). When the support member 6 is moved to the closed position with one end of the thermal paper P being fed out to the platen roller 8, the platen roller 8 is supported at a position approximately in the middle of the elongated hole 6b, so that it can be moved to an appropriate position relative to the thermal head 2. They are separated by a distance g, so that the thermal paper P can be easily placed between the platen roller 8 and the thermal head 2. After this,
When the cover 9 is rotated toward the main body 1, the engaging portion 9a begins to come into contact with the shaft 8a of the platen roller 8, and the platen roller 8 is pushed toward the thermal head 2. When the cover 9 is in the closed position, the platen roller 8 is pressed by the retaining portion 9a against the elasticity of the spring 4 in order to correct the overhang of the thermal head 2, thereby creating a proper space between the platen roller 8 and the thermal head 2. A constant pressing force is generated, and as a result, the thermal paper P inserted between the two
Accurate printing can now be performed. Further, at this time, since the tip of the hook 10 once passes over the shaft 13 and then engages with the shaft 13, the support member 6 and the cover 9 are reliably held in the closed position. On the other hand, by releasing the engagement of the lift 10 with the lever 10a, the support member 6 can be returned to the open position, so that the loading operation of the thermal paper P can be performed extremely accurately and easily.

As mentioned above, the thermal head 2 is set in advance in an overhanging state, the amount of which can be adjusted appropriately by the stopper 5, and is pressed by the spring 4, and the thermal head 2 is pushed by a predetermined amount by the platen roller 8. Because the structure ensures the required pressing force,
The dimensional accuracy of these components is relaxed to some extent, and there are also manufacturing advantages.

FIG. 4 shows the second embodiment, and in the figure, 6 and 9 are a support member and a cover in the recording device according to the first embodiment;
Reference numeral 15 is a connecting member that is adjustably attached to the cover 9 and has a ball 15b that is movable inwardly against the elasticity of the spring 15a housed at its tip, and 16 is a hole that can be engaged with the pole 15b. It is.

In this case, if necessary, the support member 6 can be connected to the cover 9 by the connection member 15 in the open position of the support member 6, and after attaching the thermal paper P to the holder 6a of the support member 6 in this state, 6 and cover 9 can be pivoted together into the closed position. That is, since the thermal paper P can be set without having to operate these individually, the loading work can be made more efficient. In addition, in this embodiment as well, the retaining portion 9
Other constituent members such as a have the same effects as those of the first embodiment. In the second embodiment, a so-called click mechanism is used to connect the support member and the cover, but the present invention is not limited to this, and any suitable connection mechanism such as a pin-punch mechanism or a 7-piece mechanism may be employed.

〔Effect of the invention〕

As described above, the recording apparatus according to the present invention has excellent advantages as a device of this type, such as being able to easily and accurately load thermal paper and being convenient in manufacturing.

[Brief explanation of the drawing]

1 to 3 relate to a first embodiment of the recording apparatus of the present invention, FIG. 1 is a perspective view of the overall structure, and FIG. 2 is a closed position state of the thermal paper support member according to the present invention. FIG. 3 is a side sectional view of essential parts of the support member and cover in the closed position according to the present invention, and FIG. 4 is a partial sectional view of the connecting member to the support member and cover according to the second embodiment. It is a diagram. 1...Body, 2...Thermal head, 3...
・Shaft, 4... Spring, 5... Stopper, 6
...Support member, 6a...Holder, 8...Platen roller, 9...Cover, 9a...Engagement piece, 10...Hook, 15..., Connecting member. Figure 2 Figure 3 99o88・10゜-”' −−−−−−−−−−”
1376 Voice 2 Procedural amendment (method) February 4, 1988 1, Indication of case Patent application No. 1988-242880 2,
Title of invention: Recording device 4, Agent: 195-195, Shinbashi, Minato-ku, Tokyo 105, Date of amendment order: 1986
January 27th 6, Subject of amendment: column for brief description of drawings in the specification. 7. Contents of correction

Claims (2)

[Claims] (1) A thermal head which is pivoted to the main body in an overhanging state while being pressed by a spring, a support member having a thermal paper holder and one end of which is pivotally connected to the main body so as to be openable and closable, and other parts of the support member. A platen roller is rotatably supported at one end of the thermal head so as to be able to move away from the thermal head in the closed position; a cover having an engagement piece that engages with the shaft to press the roller toward the thermal head; and a hook capable of holding the support member and the cover in their closed positions; A recording device in which the platen roller, which is spaced apart from the head, can press the thermal head by moving the cover to a closed position. (2) a thermal head pivotably supported on the main body in an overhanging state while being pressed by a spring; a support member having a thermal paper holder and one end pivotably attached to the main body so as to be openable and closable; A platen roller is rotatably supported at one end of the thermal head so as to be able to move away from the thermal head in the closed position; a cover having an engaging piece that engages with the shaft and presses the roller toward the thermal head; a hook that can hold the support member and the cover in the closed position; and a connecting member that can connect the support member and the cover. A recording device comprising: