JPH0350108Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a paper guide device for office machines used in printers, copying machines, and the like.

2. Description of the Related Art Conventionally, in printers and copying machines, there is a paper supply means in which a slit-like manual feed slot is formed in the housing of the printer and sheets of paper are manually inserted one by one through the manual feed slot. On the other hand, since paper sizes vary, there is an idea to slide a movable guide along the manual feed slot.

Problems that the invention attempts to solve However, a means of fixing the movable guide is also required.
The movable guide must be loosened or fixed each time the position is adjusted, making the adjustment work cumbersome.

This idea was created with these points in mind.
An object of the present invention is to provide a paper guide device for an office machine that can easily adjust the position of a movable guide according to the size of paper.

Means for Solving the Problem This invention provides a reference surface 29 that contacts one side of the paper 27 at one end of the manual feed slot 26, and a movable guide having a guide surface 32 that guides the other side of the paper 27. 3
3 is provided movably along the manual feed port 26, and the protrusion 3
A cam 37 having a cam 37 and a sheet receptacle 39 are integrally connected with a connecting body interposed therebetween and provided on the movable guide 33, and the sheet receptacle 39 is urged toward the reference surface 29 side.

Function: Therefore, the movable guide 33 can be moved freely to correspond to the size of the paper 27, but when the paper 27 is inserted from the manual feed slot 26, the paper receiver 39 will move the paper 27.
The cam 37 rotates in conjunction with this movement, and the protrusion 36 moves into the manual feed slot 2.
The movable guide 33 is fixed by pressing against a wall surface 41 parallel to the movable guide 6.

Embodiment An embodiment of this invention will be described based on the drawings.
1 is a housing. This housing 1 has a box-shaped base 2 with an opening on the top surface and a box-shaped cover 3 with an opening on the bottom surface, which are attached to a support shaft 4.
The base 2 and cover 3 are rotatably connected to each other by a clamp (not shown) on the opposite side to the support shaft 4. Also,
The base 2 has a drum frame 7 which rotates around a support shaft 5, is urged downward by its own weight, and is positioned by a stopper 6.

A cylindrical photoreceptor 8 is connected to a motor (not shown) and rotatably supported on a part of the base 2, that is, the drum frame 7, and is electrically charged along the outer periphery of the photoreceptor 8. A section 9, a toner supply section 10, a transfer section 11, a lamp 12, and a cleaning section 13 are attached. moreover,
The base 2 includes a fixing roller 14 and a discharge roller 15.
A press roller 16 that is pressed against the ejection roller 15, a motor 17 that drives the ejection roller 15 and the fixing roller 14, and a paper feeding section 18 are provided.

Further, on the back side of the upper surface of the cover 3, a light source section 19 is held which performs optical scanning by irradiating the photoreceptor 8 with a laser beam, and a recessed section 21 which holds the paper feed cassette 20 in a slidable manner is opposite to this light source section 19. It is formed. A paper feed roller 22 connected to a motor (not shown) is provided at the back of this recess 21 .

Further, the cover 3 is provided with a paper guide 24 for guiding the paper 23 in the paper feed cassette 20, and a guide 25 located below the paper guide 24 is fixed to the base 2. However, cover 3
A slit-shaped manual feeding port 26 communicating with the paper guide 24 is formed in the paper guide 24 . At one end of this manual feed slot 26 is a reference surface 29 that abuts one side edge 28 of the paper 27.
A fixed guide 30 is fixedly provided, and a guide surface 32 that abuts the other side edge 31 of the paper 27 is provided.
A movable guide 33 having a movable guide 33 is slidably fitted into the manual feed port 26. These guides 30,3
3 has a recess 35 that fits into a rail-shaped expanded portion 34 formed on one side of the manual feed port 26. The movable guide 33 has a cam 3 having a protrusion 36.
A paper receiver 39 is fixed to the other end of a rod 38, which serves as a connecting body, and one end of which is welded to the outer periphery of the cam 37. This paper receiver 39 is biased by a spring 40 and the reference surface 29
is being energized towards.

In such a configuration, in the process of rotating the photoreceptor 8 once, a charged layer is first formed on the outer periphery of the photoreceptor 8 by the charging section 9, and a laser beam from the light source section 19 is scanned onto this charged layer to form an electrostatic latent image. The electrostatic latent image is visualized by supplying toner from the toner supply section 10. On the other hand, the paper 23 pulled out from the paper feed cassette 20 by the paper feed roller 22 is transferred to the paper guide 2.
4 and the guide plate 25, the paper is sent to the lower part of the photoconductor 8 by the transfer section 11, and the toner image on the photoconductor 8 is transferred by the transfer section 11, and the toner image is transferred to the fixing roller 1.
4, and is further discharged by a discharge roller 15 and a presser roller 16.

After the transfer, the electrostatic latent image remaining on the photoreceptor 8 is transferred to the lamp 1.
The remaining toner is erased by receiving the light of 2, and the remaining toner is wiped off by the cleaning section 13.

Paper 27 other than paper 23 in paper cassette 20
When using the paper feed slot 26, first slide the movable guide 33 along the manual feed slot 26 according to the size of the paper 27. When the paper 27 is inserted into the manual feed slot 26 by pressing the movable guide 33 with your hand, the paper receiver 39 is pushed by the paper 27 and retreats outside the side edge of the paper 27, and in conjunction with this operation, the cam 37 is moved. Rotating counterclockwise, the protrusion 36 is brought into pressure contact with the wall surface 41 of the expanded portion 34, thereby fixing the movable guide 33. At this time, the tip of the protrusion 36 comes into contact with the wall surface 41 so as to bite into it at a small angle, so the frictional force between the two is large and it will not return unless a certain amount of force is applied. Therefore, even after the paper 27 has passed, the protrusion 3
6 and the wall surface 41, the paper receiver 39 will not return inward only with the strength of the spring 40. Therefore, when inserting sheets 27 of the same size, it is possible to work with the movable guide 33 locked in a fixed position. When the movable guide 33 is slid inward in this state, the engagement between the protrusion 36 and the wall surface 37 is released, the cam 37 rotates clockwise, and the paper receiver 39 returns inward. Therefore, position adjustment of the movable guide 33 can be simplified.

Effects of the invention Since this invention is configured as described above, the movable guide slides along the manual feed slot depending on the paper size, but it is linked to the movement of the paper tray when paper is inserted into the manual feed slot. The movable guide can be automatically fixed by the rotational movement of the cam, and therefore the position adjustment work can be performed very easily.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is an exploded perspective view enlarging the main parts, Fig. 2 is an enlarged front view of the fixed guide and movable guide, Fig. 3 is an enlarged vertical cross-sectional side view of the upper part of the housing, and Fig. 4 is a longitudinal cross-sectional view showing the overall structure. FIG. 1... Housing, 26... Manual feed slot, 27... Paper,
29...Reference surface, 32...Guide surface, 33...Movable guide, 36...Protrusion, 37...Cam, 39...
Paper tray, 41...Wall surface.

Claims (1)

[Scope of utility model registration request] A manual feed slot for inserting sheets of paper one by one is formed on the outer surface of the housing, a reference surface is provided at one end of the manual feed slot for abutting one side of the paper, and a guide surface for guiding the other end of the paper is provided. A formed movable guide is provided in the manual feed port so as to be able to approach and move away from the reference plane, and a cam having a protrusion that is pressed against a part of a wall surface parallel to the manual feed port of the housing is provided. A movable guide is rotatably provided on the outer surface of the movable guide, and the movable guide is configured to urge a paper receiver located on the paper ejection side toward the reference surface and to retreat outside the side edge of the paper by the pressure of the paper. The paper receiver and the cam are integrally connected through a connecting body, and when the paper receiver is pressed by the paper, the cam is moved parallel to the manual feed opening of the housing. A paper guide device for an office machine, characterized in that it comes into pressure contact with a part of a wall surface.