JPH06293458A - Paper sheet feeding device - Google Patents

Abstract

PURPOSE:To provide a sheet feeding device which can improve workability at the time of assembly and paper jamming, by reducing the number of part items. CONSTITUTION:An insertion hole 15 is formed on one end side of the lower guide plate 10 of a paper guide 7 and a screw hole 16 is formed on the other end side. An engaging part 18 engaged with the insertion hole 15 of the lower guide plate 10 is formed in the end on one side of an upper guide plate 11 and an insertion hole 19 for a screw is formed on the end on the other side thereof. The ends on both sides of the lower and upper guide plates 10 and 11 are intercoupled not by means of a screw but the ends on the one side of the two guide plates 10 and 11 are engaged with each other for coupling in relation of a recess and a protrusion and only the ends on the other side are intercoupled by means of a screw 21. As a result, since the number of part items can be reduced, an assembly work is sharply simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feeding device for feeding recording paper such as roll paper.

[0002]

2. Description of the Related Art There is a facsimile apparatus having a thermal head arranged opposite to a platen roller. Then, in the process in which the heat-sensitive roll paper passes between these, the heat generated by the thermal head causes printing on the heat-sensitive roll paper on the platen roller. The printed heat-sensitive roll paper is sent to the cutter side consisting of a fixed blade and a movable blade for a predetermined distance, then automatically cut by the cutter,
It is placed on the discharge tray.

In order to reliably guide the roll paper fed from the platen roller side between the fixed blade and the movable blade, a paper guide is arranged between the platen roller and the cutter. This paper guide is composed of a lower guide plate that is attached and fixed to the apparatus case, and an upper guide plate that is arranged to face the lower guide with a gap. By passing through this gap, the roll paper is reliably guided between the fixed blade and the movable blade.

[0004]

However, since the upper guide plate of the paper guide is fixed to the device case, the lower guide plate, etc. by screws at both ends, the number of parts is large and the assembly is difficult. Workability at time is poor.
Also, when a paper jam of the roll paper occurs, the jammed roll paper cannot be removed unless the screws on both ends are removed, so the workability at the time of paper jam or maintenance is very poor. There's a problem.

The present invention has been made to solve the above problems, and an object thereof is to provide a sheet feeding apparatus capable of reducing the number of parts and improving workability at the time of assembling or paper jam. Especially.

[0006]

In order to achieve the above object, according to the present invention, one end of a first guide is provided in a sheet feeding device in which a gap for guiding a recording sheet is provided between the first and second guides. Is engaged with the second guide or the device case, the other end is fixed to the second guide or the device case with a screw, and the engagement can be released by removing the screw. .

[0007]

According to the above construction, when the first guide and the second guide are assembled, first, one end of the first guide is engaged with the second guide or the apparatus case. Then, from that state, the other end of the first guide is fixed to the second guide or the frame with a screw. Further, when removing the first guide, this operation is performed in reverse order.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a facsimile machine will be described below with reference to the drawings.

As shown in FIG. 1, an opening is formed in the upper surface of a main frame 1 made of synthetic resin, and a top frame 2 made of metal is supported by a shaft (not shown) so that it can be opened and closed. A cover 3 made of synthetic resin is fixed to the upper surface of the top frame 2. Therefore, the cover 3 also opens and closes with respect to the main frame 1 integrally with the top frame 2. The main frame 1, the top frame 2, and the cover 3 form an apparatus case. A discharge port 1a for discharging the recording paper is formed between the rear portions of the main frame 1 and the cover 3. On the upper surface of the cover 3, a document tray section 3a on which a document (not shown) is placed, an operation panel section 3b in which various operation keys and switches are arranged, and the like are provided. A thermal head 4 is mounted on the back surface of the rear portion of the top frame 2.

At the front portion of the main frame 1, there are arranged a mechanism for feeding an original into the main frame 1, an image sensor for reading image data on the original (both not shown). Further, a roll paper storage portion 5 that stores a heat-sensitive roll paper P as a recording paper is formed in a substantially central portion of the main frame 1. A platen roller 6 is rotatably supported at a position in the rear portion of the main frame 1 facing the thermal head 4. A paper guide 7 is fixed on the main frame 1 on the downstream side of the platen roller 6, and a cutter 8 for cutting the heat-sensitive roll paper P is mounted on the main frame 1 behind the paper guide 7. ing. A recording paper discharge tray 9 on which a printed portion of the thermosensitive roll paper P cut by the cutter 8 is placed is detachably mounted on the main frame 1 on the downstream side of the cutter 8.

As shown in FIGS. 1 and 2, the paper guide 7 is composed of a lower guide plate 10 as a first guide and an upper guide plate 11 as a second guide. Each of the guide plates 10 and 11 is formed by press molding. As shown in FIGS. 2 and 4, through holes 12 are formed at both ends of the base end surface 10 a of the lower guide plate 10. A screw 13 is inserted into the through hole 12, and the screw 13 is screwed into the main frame 1. That is, the lower guide plate 10 is attached and fixed to the main frame 1 by the screws 13.

The recording paper guide surface 10 of the lower guide plate 10
b is substantially parallel to the base end face 10a. A locking portion 14 that bends in a stepwise manner is formed on one end side of the recording paper guide surface 10b. An insertion hole 15 is formed in the locking portion 14. On the other hand, the recording paper guide surface 10
On the other end side of b, a support surface 17 having a screw hole 16 is formed so as to be bent obliquely with respect to the guide surface 10b.
In order to bring the front end of the recording paper guide surface 10b of the lower guide plate 10 closer to the platen roller 6,
The base surface 10a of the lower guide plate 10 and the recording paper guide surface 10b
A curved portion 10c that is curved along the peripheral surface of the platen roller 6 is formed between and.

The curved portion 1 facing the through hole 12 is also provided.
A cutout portion 10d is formed at 0c. The notch 10d prevents interference between the tightening tool (driver) for the screw 13 and the lower guide plate 10, and the screw 13 can be smoothly tightened.

As shown in FIGS. 2 and 3, one end of the recording paper guide surface 11a of the upper guide plate 11 is engaged with an insertion hole 15 formed in the lower guide plate 10. The portion 18 is formed so as to project. On the other hand, the recording paper guide surface 11a
On the other end side of the guide surface 11a is bent obliquely with respect to the guide surface 11a,
A support surface 20 having an insertion hole 19 is formed. A screw 21 is inserted into the insertion hole 19, and the screw 21 is screwed into the screw hole 16 of the lower guide plate 10.

That is, one end of each of the lower guide plate 10 and the upper guide plate 11 has a through hole 1 in the lower guide plate 10.
2 and the engaging portion 18 of the upper guide plate 11 are fixed to each other, and the other end side is fixed by a screw 21. Then, as shown in FIGS. 1 and 5, the two guide plates 10 and 11 face each other to form a gap 22 through which the heat-sensitive roll paper P passes.

The cutter 8 is composed of a non-rotatable fixed blade 8a fixed to a bracket (not shown) and a movable blade 8b rotatably supported by the bracket by a shaft 8c. The shaft 8c is located on a line oblique to the paper feeding direction. Therefore, the movable blade 8b is also supported by the shaft 14 in an oblique manner with respect to the paper feeding direction. The movable blade 8b rotates toward the fixed blade 8a by driving a motor (not shown). The heat-sensitive roll paper P is cut due to the engagement relationship between the fixed blade 8a and the movable blade 8b.

That is, the paper guide 7 has the fixed blade 8
Between the a and the movable blade 8b, it has a function of guiding the thermal roll paper P that has passed between the thermal head 4 and the platen roller 6, and opens the top frame 2 and the cover 3 so that it is above the main frame 1. It also serves as a cover for preventing the user or the like from touching the cutter 8 when the is opened. Therefore, the upper side of the upper guide plate 11 of the paper guide 7 is formed in a slanted shape together with the movable blade 8b so as not to interfere with the movable blade 8b.

Next, for example, a process when the heat-sensitive roll paper P is bent between the paper guide 7 and the cutter 8 and jams will be described. First, when the paper jam of the thermal roll paper P occurs, the top frame 2 and the cover 3 are opened to open the upper part of the main frame 1. In this state, the screw 21 whose head is exposed from the other end of the upper guide plate 11 is moved to the lower guide plate 10 using a screwdriver.
Of the lower guide plate 10 and the upper guide plate 11 are made free. Next, the lower guide plate 1
The engagement between the insertion hole 15 of 0 and the engagement portion 18 of the upper guide plate 11 is released. As a result, the upper guide plate 11 can be removed from the lower guide plate 10.

By removing the upper guide plate 11,
Because the bent thermosensitive roll paper P becomes free,
The bent portion of the thermosensitive roll paper P can be separated. Then, the upper guide plate 11 is replaced with the lower guide plate 1 again.
When assembling 0, the engaging portion 18 of the upper guide plate 11 is engaged with the insertion hole 15 of the lower guide plate 10. Next, screw 21
The upper guide plate 11 is fixed to the lower guide plate 10 by. Then, by finally closing the top frame 2 and the cover 3, it becomes possible to continue printing again.

As described above, in this embodiment, the insertion hole 15 is formed at one end of the lower guide plate 10 of the paper guide 7, and the screw hole 16 is formed at the other end. Further, the insertion hole 1 of the lower guide plate 10 is provided at one end of the upper guide plate 11.
The engaging portion 18 to be engaged with 5 is formed with the insertion hole 19 on the other end side for inserting the screw 21.

That is, in this embodiment, the lower guide plate 10
Rather than connecting both ends of the upper guide plate 11 and the upper guide plate 11 together with screws, one end side of both guide plates 10 and 11 are engaged and connected with each other in a concavo-convex relationship, and only the other end side is connected with the screw 21.
It was configured to be connected by. As a result, in this embodiment, unlike the prior art, the number of parts can be reduced, so that the assembling work can be greatly simplified. Further, even when a trouble such as a paper jam of the heat-sensitive roll paper P occurs, the lower guide plate 10 can be quickly separated from the upper guide plate 11, which is also excellent during maintenance work.

The present invention is not limited to the above embodiments, but may be constructed as follows, for example, within the scope of the invention. (1) In the above embodiment, the embodiment is embodied in the facsimile machine using the heat-sensitive roll paper P as the recording paper, but it is embodied in the paper guide such as the facsimile machine or the copying machine in which the recording papers of the predetermined size are stacked in advance. Good.

(2) In the above embodiment, the lower guide 10 as the first guide is provided with the insertion hole 15 and the upper guide 11 is provided with the engaging portion 18, but the engaging relationship of the concave and convex portions is reversed. Then, an insertion hole may be formed on the upper guide 11 side and an engaging portion may be formed on the lower guide 10.

(3) In the above embodiment, the upper guide plate 11
Was attached to the lower guide plate 10, but the upper guide plate 11
May be attached to the main frame 1. That is, in this case, the main frame 1 acts as the lower guide plate 10.

(4) In the above embodiment, the facsimile machine provided with the cutter 8 for cutting the heat-sensitive roll paper P is embodied, but it may be embodied in a facsimile machine of the type that manually cuts the roll paper P. .

[0026]

As described in detail above, according to the present invention,
An excellent effect is to provide a paper guide that can reduce the number of parts and improve workability in assembling.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a facsimile apparatus showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a paper guide.

FIG. 3A is a plan view of an upper guide plate, and FIG.
FIG. 4 is a front view of an upper guide plate.

FIG. 4A is a plan view of a lower guide plate, and FIG.
FIG. 4 is a front view of a lower guide plate.

FIG. 5 is a partial cross-sectional view of a facsimile device showing a paper guide mounting structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main frame which comprises a device case, 2 ... Top frame which comprises a device case, 7 ... Paper guide, 1
0 ... Lower guide plate as first guide, 11 ... Upper guide plate as second guide, 15 ... Insert hole, 16 ... Screw hole, 18 ... Engaging portion, 22 ... Gap, P ... As recording paper Thermal roll paper

Claims (1)

[Claims] 1. A sheet feeding device having a gap for guiding a recording sheet between the first and second guides, wherein one end of the first guide is engaged with the second guide or the device case,
A sheet feeding device configured such that the other end is fixed to the second guide or the device case with a screw and the engagement is released by removing the screw.