JP3000322B2 - Paper feed guide - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed guide used for OA equipment using a medium.

[0002] This type of paper feed guide has an inclined portion for colliding the conveyed medium, and the inclined portion guides the hit medium and guides the medium to a narrowed entrance of the conveying path. In OA equipment with a small internal space,
To make it possible to take out the interior part for replacement or the like, a part of the upper edge of the inclined portion is cut out so that the part can be taken out from this part.

[0003]

2. Description of the Related Art FIG. 4 shows the structure of a conventional notched paper feed guide of this type. FIG. 4A is a plan view and FIG.
(B) in the A-A sectional view on arrows of FIG. 4 (A), the paper feed guide 1, a first inclined portion 2 of the inclination angle theta ₁ and a second inclined portion 3 of the inclination angle theta ₂ Have. 100 is a medium to be conveyed.

The paper feed guide 1 has a trapezoidal notch 4 (a part with a diagonally upwardly sloping line in FIG. 4A) formed in a part of a first inclined part 2 inclined at an angle of θ ₁ . and, a second inclined bottom 4a and a bottom width equal Moreover lower height than the height h ₁ of the first inclined portion 2 of the portion h ₂ of the width of the upper than the top of the notch 4 is narrow and the notch The part 3 with the bottom 4a
With connected integrally bottom is inclined with cutlet theta ₁ is greater than theta ₂ angle aligned to the notch 4 of the sides and the second
The two sides of the inclined portion 3 are integrally connected by a triangular connecting member 5.

[0005] The paper feed guide 1 having such a configuration is used.
And the height h of the second inclined portion 3_TwoIs the height of the first inclined portion 2
h₁Lower and the inclination of the second inclined part 3
Angle θ _TwoIs larger, so pull out the internal components
It can be done easily. However, this conventional structure
The guide has the following disadvantages.

[0006]

When the medium 100 is conveyed and the corner portion 100a (see FIG. 4A) hits the connecting member 5, the corner portion 100a is guided by the connecting member 5, and the second inclined portion 100a is guided by the connecting member 5. The recording medium may come out of the section 3 and the corner of the medium may be broken or jammed. This problem occurs particularly frequently when the corner portion 100a is curled.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper feed guide which can stably guide a medium sent so that a corner portion hits a connecting member without causing breakage or jam.

[0008]

Means for Solving the Problems To achieve the above object,
Therefore, in the present invention, θ₁For medium guide inclined at an angle of
Form a trapezoidal notch that spreads out on a part of the sloped part
The width of the upper portion is smaller than the upper portion of the notch and
The width of the bottom is equal to the width of the bottom.
A second inclined portion having a lower height, at the bottom of the notch,
Align bottom and θ ₁Greater θ_TwoAt an angle of
Notch of the first inclined portion.
A triangle connecting portion between both sides of the second inclined portion and both sides of the second inclined portion.
Paper feed guides connected together
And a medium is provided to the connection member on the medium entry side of the connection member.
Connect the corners of the body as they enter
A rib for guiding along the upper edge of the member and leading to the second ramp
It is configured to protrude. This rib has a second inclined portion
It is desirable to extend to reach.

[0009]

When the medium is conveyed with the medium corner hitting the connecting member, the corner hitting the connecting member is guided along the upper edge of the connecting member by the rib and guided to the second inclined portion. Therefore, even if there is a curl in the corner, the medium can be fed stably without breaking or jamming. This effect is particularly remarkable when the rib is formed to extend to the second inclined portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is an explanatory view of the structure of the paper feed guide 11 of the present embodiment. FIG. 1 (A) is a plan view, and FIG. 1 (B) is a sectional view taken along the line BB of FIG. 1 (A). In the figure, reference numeral 12 denotes a rib. The same reference numerals are used for members similar to those in the related art. Rib 1
2 is protruded along the vicinity of its upper edge on the medium entry side of the connection member 5 and extends to the second inclined portion 3. This rib 1
The operation of No. 2 is as follows.

When the medium 100 is conveyed such that the corner portion 100a of the medium is directed toward the connecting member 5 as shown in FIG. 1A, the corner portion 100a hits the rib 12, and the rib 12 causes the corner portion 100a to move as shown in FIG. B) is guided in the direction indicated by the arrow (direction along the upper edge of the connection member 5), and is reliably guided to the transport path entrance 13 without coming out on the second inclined portion 3.

Therefore, even if there is a curl or the like in the corner portion, the occurrence of breakage or jam, which has been a problem in the past, is prevented.
The media is sent stably.

FIG. 2 shows the structure of a printer to which the present invention is applied.
And FIG. FIG. 2A is a front view of the printer, and FIG.
(B) is an enlarged view of the main part (A) of FIG. 2 (A), and FIG. 3 (A)
3B is a side view of the printer, FIG. 3B is an enlarged view of a main part (b) of FIG. 3A, and FIG.
This is shown in (B). The main configuration of this printer will be described together with its operation.

In FIG. 1, reference numeral 21 denotes a carrier which is guided by a stay shaft 22 and moves along a platen 23. A print head 24 and a ribbon cassette 25 are mounted on the carrier 21. An endless ink ribbon is accommodated in the ribbon cassette 25, and the endless ink ribbon is attached to a ribbon pulley 26 mounted on the carrier 21.
As a result, a transfer force is applied by a feed roller driven by a ribbon drive shaft 28 that is driven in a one-way manner by being driven through a drive system including twin gears 27 ₁ , 27 _2, etc., and circulates through the printing unit.

The ribbon pulley 26 is
And driven by a ribbon pulley whose both ends are fixed to the left and right side frames of the apparatus. Printing is performed by operating the print head 24 moving along the platen 23 in a predetermined pattern at a predetermined time.

[0017]

As described above, according to the present invention, the ribs guide the corners of the medium which has been conveyed and hit the connecting member so as to guide the medium so as not to come out on the second inclined portion. Therefore, the medium can be fed stably while preventing the medium from being broken or jammed, and the reliability of the apparatus can be improved.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory views of the structure of a paper feed guide according to an embodiment of the present invention. FIG. 1A is a plan view, and FIG.
It is -B sectional drawing.

FIG. 2 is a structural explanatory view of a printer to which the present invention is applied;
FIG. 2A is a front view of the printer, and FIG.
It is a principal part enlarged view of (A).

FIG. 3 is a structural explanatory view of a printer to which the present invention is applied;
FIG. 3A is a side view of the printer, and FIG.
It is a principal part enlarged view of (A).

4 (A) is a plan view and FIG. 4 (B) is a plan view of a conventional notched paper feed guide, and FIG.
It is -A sectional drawing.

[Explanation of symbols]

 2 1st inclined part 3 2nd inclined part 4 Notch 4a Bottom part 5 Connection member 11 Paper feed guide 12 Rib 100 Medium 100a Corner part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 23/00-23/34 B65H 5/36-5/38 B41J 15 / 04,13 / 10

Claims (1)

(57) [Claims] _1. A _first medium guiding medium inclined at an angle of θ 1.
Form a trapezoidal notch that spreads out on a part of the slope of the
A second inclined portion having a width smaller than that of the upper portion of the notch and having a width equal to the width of the bottom and the bottom of the notch and having a height lower than the first inclined portion is provided at the bottom of the notch. by being inclined with connecting together at cutlet theta ₁ is greater than theta ₂ angles aligned, respectively integral with the first inclined portion of the notched sides and said second connecting member of the triangle and the sides of the inclined portion of the In the paper feed guide connected to the medium, on the medium entry side of the connection member, when the corner portion of the medium enters the connection member, guide the corner along the upper edge of the connection member, 2. A paper feed guide characterized by projecting ribs leading to a second inclined portion.