JP2901775B2 - Printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer in which a carriage having a print head is reciprocated along a stay shaft.

[0002] If a rolling bearing is used in the contact portion between the carriage and the stay shaft, the size and cost of the carriage are greatly increased, so that a sliding bearing is generally used there and lubricating oil is supplied.

[0003]

2. Description of the Related Art Generally, bushings are mounted on both ends of a carriage as slide bearings, and stay shafts are slidably fitted in the bushings. Then, the oil-impregnated felt containing the lubricating oil is accommodated in the carriage so as to be in contact with the stay shaft.

Therefore, each time the carriage reciprocates, the lubricating oil contained in the oil-impregnated felt is applied to the stay shaft in the carriage, and the sliding surface is lubricated.

[0005]

As described above, the oil-impregnated felt is accommodated in the carriage, but the lubricating oil gradually leaks to the outside of the carriage from the sliding surface between the bush and the stay shaft, and the side wall of the carriage. And run down.

[0006] Then, the lubricating oil adheres to the surface of the printing paper or the electronic circuit, which significantly deteriorates the printing quality or causes serious trouble.

Accordingly, an object of the present invention is to provide a printer in which lubricating oil does not flow down from a carriage.

[0008]

In order to achieve the above-mentioned object, a printer according to the present invention will be described with reference to FIG.
As shown in FIG. 1, a carriage 6 slidably fitted to and supported by the stay shaft 1 and reciprocates along the stay shaft 1 with the print head 7 attached thereto, and the stay shaft 1 of the carriage 6 And an oil absorbing member 68 attached to the back surface at a position lower than the lower end of the fitting portion, and the oil absorbing member 68 from the side wall portion of the carriage 6 at a position lower than the lower end of the fitting portion with the stay shaft 1. And an oil guide groove 70 formed in the carriage 6.

In the carriage 6, an oil supply member 65 impregnated with oil in advance is provided in contact with the stay shaft 1, and the oil absorption member 68 is made of felt having a higher density than the oil supply member 65. Good.

[0010]

The function of the carriage 6 from the fitting portion with the stay shaft 1
The lubricating oil leaked out of the carriage 6 along the side wall of the carriage 6 is guided from the side wall of the carriage 6 to the back surface of the carriage 6 through the oil guide groove 70 and is absorbed by the oil absorbing member 68 there.

[0011]

An embodiment will be described with reference to the drawings.

FIG. 2 shows the whole view of the horizontal printer. In the drawing, reference numerals 1 and 2 denote stay shafts and guide rails fixed horizontally in parallel with the platen 3 and supported by side frames 4 and 5 on both left and right sides.

Reference numeral 6 denotes a dot impact type print head.
And a carriage on which the ribbon cassette 8 is mounted, and is provided movably in a reciprocating direction along the stay shaft 1 and the guide rail 2.

A drive belt 11 which is rotated by a space motor 10 is connected to the carriage 6, and by reciprocating the space motor 10, the carriage 6 moves along the platen 3 (ie, along the printing surface). It is driven back and forth. When the carriage 6 moves, the print head 7 moves while facing the platen 3.

The ribbon cassette 8 is detachably attached to a pair of arms 61 projecting from the carriage 6. Then, the ink ribbon loaded in the ribbon cassette 8 travels between the print head 7 and the platen 3. 1
Reference numeral 2 denotes a head cover over the print head 7. 13
Is a flexible cable for sending power and signals to the print head 7.

FIG. 3 shows the carriage 6 alone and the stay shaft 1, and FIG. 4 shows a cross section of a fitting portion between the carriage 6 and the stay shaft 1.

At both ends of a hole 62 formed in the carriage body 60 horizontally, bushes 6 made of a material having good lubricity are provided.
3 is press-fitted, and the inner diameter of the bush 63 is movably fitted to the outer diameter of the carriage 6.

An oil-impregnated felt (oil-supplying member) 6 is provided at a central portion in the hole 62 so as to contact the outer periphery of the stay shaft 1.
5 is attached. In this oil-impregnated felt 65,
A felt having a relatively small density is used and contains a lubricating oil made of, for example, silicone oil in advance.
Therefore, when the oil-impregnated felt 65 slides on the stay shaft 1 integrally with the carriage main body 60, the lubricating oil is gradually applied to the stay shaft 1 side.

As shown in FIG. 3, the carriage body 6
An oil guide groove 70 is formed at the lower edge of the side wall 69 of the zero.

FIG. 1 and FIG. 5 are a perspective view and a partial front sectional view, as viewed from obliquely below, including the oil guide groove 70.

As shown in these figures, a concave portion 67 formed on the bottom surface (back surface) of the carriage main body 60 includes:
The oil-absorbing felt 68 is adhered with an oil-resistant adhesive or the like. As the oil absorbing felt 68, a felt having a higher density than the oil-impregnated felt 65 is used so that the absorbed lubricating oil can be held with a large holding force.

The oil absorbing felt 68 is attached to the carriage body 60.
Are provided adjacent to both side edges of the stay shaft 1 at a position lower than the lower end of the stay shaft 1.

Then, both side walls 69 of the carriage body 60
At the lower edge, an oil-absorbing felt 68 opens to the side wall 69 side.
Is formed. The oil guide groove 70 is also formed at a position lower than the lower end of the stay shaft 1, and is formed so as to be inclined downward toward the oil absorbing felt 68.

Therefore, the lubricating oil leaked out of the carriage main body 60 from the gap between the fitting portion of the bush 63 and the stay shaft 1 flows from the side wall 69 of the carriage main body 60 into the oil absorbing felt 68 through the oil guide groove 70. Is absorbed by the oil absorbing felt 68 and stored there, and does not fall below it.

The oil guide groove 70 may be a hole. In this case, unless the hole has a considerably large size, the lubricating oil cannot pass through the hole due to surface tension.

[0026]

According to the printer of the present invention, the lubricating oil leaking out of the carriage from the fitting portion between the stay shaft and the carriage is absorbed by the oil absorbing member through the oil guide groove.
Since it is stored there, lubricating oil does not drop onto the printing paper surface or onto the electronic circuit, and it is possible to prevent the printing quality from deteriorating and electrical failures from occurring before and easily.

[Brief description of the drawings]

FIG. 1 is a partial perspective view of an embodiment.

FIG. 2 is an overall perspective view of the embodiment.

FIG. 3 is a partial perspective view of the embodiment.

FIG. 4 is a partial sectional view of the embodiment.

FIG. 5 is a partial sectional view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stay shaft 6 Carriage 7 Print head 68 Oil absorption felt (oil absorption member) 70 Oil guide groove

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B41J 19/20 B41J 25/34 B41J 2/24

Claims (1)

(57) [Claims] 1. A carriage which is slidably fitted to and supported by a stay shaft, reciprocates along the stay shaft with a print head mounted thereon, and a carriage which is impregnated with oil in advance and comes into contact with the stay shaft.
The lubricating member disposed in the carriage, and formed of felt having a higher density than the lubricating member.
And an oil absorption member attached to the rear surface side of a position lower than the lower end of the fitting portion between the stay shaft of the carriage Te, the the sidewall portion oil absorption of a position lower than the lower end of the fitting portion between the stay shaft of said carriage An oil guide path formed in the carriage so as to reach the member.