JPH0462082A - Printer - Google Patents

Abstract

PURPOSE:To prevent a printing noise from right and left of a sheet contact part by providing the first cover attached to both sides of the sheet contact part of a sheet stand at the ends of paired side plates and the second cover which prevents a gap from generating between an enclosure and the first cover. CONSTITUTION:A noise-proof cover 6a is mounted on a sheet stand 6, and a gap which generates a front cover 5 and the noise-proof cover 6a is prevented by a noise-proof cover 7 when a continuous from is used. Thus the right and left sides of the sheet contact part of the sheet stand 6 are blocked by the side plates of the noise-proof cover 6a when a cutform or a continuous form is used. Therefore, no leakage of a printing noise from the right and left sides of a sheet discharge path occurs, contributing to the reduction of a noise.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an impact printer.

Conventional technology A conventional printer will be explained below.

FIG. 4 is a sectional view of a conventional printer.

In FIG. 4, 21 is a housing in which the print head 22, platen 23, and their drive unit (not shown) are built in, 24 is a front cover detachably attached to the top of the print head of the housing, and 25 is a continuous board. It is a paper stand that is set in a horizontal position when in use, and is locked at a fixed position relative to the horizontal surface when using a single sheet. Reference numeral 26 includes a pair of side plates 26a and 26b that contact both sides of the paper contacting portion of the paper stand 25, and a soundproof cover having a plurality of ribs 26c parallel to the side plates, and is pivotally supported at the end of the soundproof cover 24.

Problems to be Solved by the Invention However, in the above conventional configuration, due to the difference in the supporting points of the paper stand and the soundproof cover, the gap between the paper stand and the side plate of the soundproof cover that occurs when using a single sheet, as shown in FIG. 6 (b). As a result, the printing sound leaking through the gap becomes louder, making the printing sound louder when using a single sheet.

Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention provides: (1) a first cover that has a pair of side plates and is attached to both sides of the paper contacting portion of the paper stand at the ends of the side plates; and a second cover that prevents a gap from forming between the housing and the first cover.

Function: Due to the above-described configuration, the present invention prevents printing sound from leaking from the left and right sides of the paper contacting portion.

Embodiment FIGS. 1(a) and 1(b) are cross-sectional views of the vicinity of the paper conveyance path when the printer is used for continuous sheets and when used for single sheets, respectively, in one embodiment of the present invention, where 1 is the housing and 2 is the The print head, 3 is a platen, and 4 is a tractor feeder, which are the same as those in the prior art, so their explanations will be omitted. The soundproof cover 6a is fixed to the paper stand. A soundproof cover 7 is rotatably supported at the end of the front cover 5 on the paper stand 6 side, and closes the gap between the front cover 5 and the soundproof cover 6.

In the printer configured as described above, the soundproof cover 6b is attached to the paper stand 6, and the gap created between the front cover 5 and the soundproof cover 6a when continuous paper is used is closed by the soundproof cover 7. For this reason, paper stand 6
Since the left and right sides of the paper abutting part are closed by the side plates of the soundproof cover 6a when both single-sheet and continuous-sheet use are used, printing sound does not leak from the left and right sides of the paper ejection path, reducing noise.

2(a) and fb) are cross-sectional views of the vicinity of the paper conveyance path of a printer according to a second embodiment of the present invention, and 11 is a housing;
Reference numeral 12 is a print head, I3 is a platen, 14 is a tractor feeder, 15 is a front cover, and 18 is a rib, which are the same as in the first embodiment, so their explanation will be omitted.

The upper end +7a of the soundproof cover 17 is rotatably supported by the left and right ends of the paper stand 16.

With the above configuration, if paper gets jammed between the paper stand 16 and the soundproof cover 17, as shown in FIG. 3(a),
As shown in (b), the jammed paper can be removed by rotating the soundproof cover 17 in the direction of the arrow.

Effects of the Invention The present invention includes a first cover that has a pair of side plates and is attached to both sides of the paper contacting portion of the paper stand, and a second cover that closes the gap between the casing and the first cover. As a result, it is possible to eliminate the gap that occurs on the left and right sides of the paper contacting portion, and noise can be reduced.

[Brief explanation of the drawing]

Figures 1 fa) and (b) are cross-sectional views of the vicinity of the paper conveyance path when the printer is used in continuous form and in single form, respectively, in an embodiment of the present invention, and Figures 2 (a) and (b) are FIGS. 3(al) and 3(b) are cross-sectional views of the vicinity of the paper conveyance path when the printer is used for continuous sheets and when used for single sheets in the second embodiment of the present invention, respectively.
l is the soundproof cover of the same printer, 4...
...Tractor feeder, 5...Front cover, 6...Paper stand, 6a...
Soundproof cover, 7...Soundproof board. Name of the agent: Patent attorney Shigetaka Awano et al. Fig. 2 is a side view of the paper stand and soundproof cover of the same printer when using continuous sheets and single sheets. 1... Housing, 2... Print head, 3.
...Brate 1- Longing body 4 + Ukutafu (
-G2- Printing head 5 Front cover (α) Horizontal position (b) Inclined position body Toner lid feeder (d) Horizontal position (b) Inclined position Figure 25- Peno (0-stand 26- Soundproof cover

Claims (1)

[Claims] (1) A print head that prints by applying an impact force to the paper, a platen that supports the paper from the back side of the print head, and a platen that accommodates the print head and the platen and discharges the paper from the platen and transfers it to the platen. The paper supply is carried out using a casing having a paper transport port and a paper guide that guides the paper from the outside through the paper transport port to the platen and discharges the paper from the platen to the outside via the paper transport port. a paper stand having a pair of side plates and a first cover attached to both sides of the paper contacting part of the paper stand at the end of the side plate; A printer including a second cover that closes a gap.