JPH081873Y2 - Printing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a printing apparatus that selectively uses various paper cassettes of different sizes.

2. Description of the Related Art Conventionally, in a printing device such as a printer, a copying machine, or a facsimile, it is generally performed that a paper feed cassette is detachably attached to one of left and right sides of the housing when the housing is viewed from the front. .

Problems to be solved by the invention In this case, there are a structure in which the paper feed cassette is mounted on the side surface of the housing and a structure in which the paper feed cassette is mounted inside. In both cases, the paper cassette is detachably mounted on the side of the housing. Therefore, there is a problem in that the floor area of the office is wasted because a plurality of printing apparatuses cannot be arranged adjacent to each other.

Means for Solving Problems A sheet feeding path, a printing section, and a sheet discharging path are sequentially arranged in the housing from the front to the rear, and a sheet feeding section is provided in the sheet feeding path and the sheet discharging path. A cassette storage chamber is formed in the lower portion of the housing so that the front and rear surfaces thereof are opened to allow passage of the paper feed cassette, and the paper feed cassette is detachably inserted from the front side. A paper feed roller that contacts the paper in the paper feed cassette between the front of the paper feed path and the paper feed path, and abuts against the paper feed cassette in the cassette storage chamber, A stopper that matches the sheet feeding position of the sheet feeding roller is formed, the opening of the rear surface of the cassette storage chamber is closed, and the sheet is accommodated in the housing and is pressed and opened by the projecting sheet cassette and the sheet feeding cassette is opened. Protruding from the housing of A cover that covers the upper surface is rotatably provided.

Action Regardless of the size of the paper feed cassette, the paper feed position of the paper feed cassette in the cassette storage chamber is set by the stopper so that it coincides with the paper feed position of the paper feed roller. Since the rear surface of the cassette storage chamber is open, it is possible to insert a paper cassette of a size longer than this depth even if the depth of the housing is reduced.
Moreover, since the paper feed cassette is attached to and detached from the front surface of the housing, other devices can be closely arranged on both left and right sides of the housing, and a cover is provided on the rear surface of the housing to be openable and closable. Therefore, when the paper feed cassette does not protrude from the housing, the cover can close the opening, and even if the paper feed cassette protrudes from the housing, the cover covers the upper surface of the paper feed cassette. The stored paper can be protected from dust and the like.

Embodiment An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a housing, and the housing 1 includes a printing unit 2 and a paper feed cassette 3
From the sheet feeding path 4 to the printing section 2, and between the rear end of the sheet feeding path 4 and the sheet discharge port 5 formed in the upper rear portion of the housing 1 is curved so as to make an upward U-turn. And a paper discharge path 6 are provided. In addition, a paper feed path 4 is provided on the front surface of the housing 1.
A manual guide portion 7 for inserting a sheet is provided in the middle of. Feed rollers 9, 10, 11 and 12 which are paper feeding portions are rotatably provided in the paper feed path 4 and the paper discharge path 6 by being connected to a motor (not shown).

The printing unit 2 includes a rotatable photoconductor 13, a charger 14 that applies a charge to the outer periphery of the photoconductor 13 to charge the photoconductor 13,
An exposure unit 15 that exposes the charged portion based on the print data to form an electrostatic latent image, and a developing device 16 that develops the electrostatic latent image.
A transfer charger 17 for transferring the toner image on the photoconductor 13 to the paper, a fixing roller 18 with a built-in heater for fixing the transferred image transferred on the paper, and abutting elastically contacting the fixing roller 18. The pressure contact roller 19, a cleaning mechanism 20 for wiping off the residual toner on the photoconductor 13, and a discharge lamp 21 for erasing the electrostatic latent image on the photoconductor 13.

Further, in the lower part of the housing 1, a front surface 29 and a rear surface of the housing 1 are provided.
A cassette storage chamber 25 is formed which opens at 30 and into which the paper feed cassette 3 is detachably inserted. This cassette storage room
Between the front of 25 and the paper feed path 4, a paper feed roller 8 that comes into contact with the uppermost sheet 22 in the paper feed cassette 3 is rotatably provided by being connected to a motor. As shown in FIG. 2, locking claws 26 that can bend in the left-right direction are integrally formed on both sides of the sheet feeding cassette 3, and the locking claws 26 are elastically engaged with the locking claws 26. A stopper 28 that abuts on the locking hole 27 and the tips of these locking claws 26 to set the insertion position of the paper feed cassette 3.
And are formed on both sides of the cassette storage chamber 25. Further, as shown in FIG. 1, a cover 31 is attached to the lower portion of the rear surface 30 of the housing 1 so as to be rotatable about a hinge 32 so as to close the opening of the cassette storage chamber 25.

In such a configuration, the paper 22 in the paper feed cassette 3 is
Is pulled out by the paper feed roller 8 while being separated one by one by the peeling claw 3a of the paper feed cassette 3 and then conveyed by the feed rollers 9 and 10 so that the toner image on the photoconductor 13 is transferred by the transfer charger 17. Transferred, then the fixing roller 18
Then, the paper is ejected from the paper ejection port 5 to the paper ejection receiver 24 by the feed rollers 11 and 12, and the leading edge contacts the stopper 23 and is aligned.

When replacing the paper feed cassette 3, the grip 3b formed on the front part of the paper feed cassette 3 is gripped and attached from the front of the cassette storage chamber 25. As a result, the work of attaching and detaching the paper feed cassette 3 can be performed even if other office machines are adjacent to each other on both left and right sides of the housing 1 without a gap. In addition, the cassette storage room 25 is the housing 1
Since the rear surface 30 is also opened, the longest paper feed cassette 3 matched to the paper size can be stored in a state of being projected rearward. As a result, the depth dimension of the housing 1 can be reduced and the weight can be reduced. Also, when wearing,
Since the insertion position of the paper feed cassette 3 is fixed by the stopper 28, the position of the front portion of the paper feed cassette 3 can be made to correspond to the position of the paper feed roller 8 regardless of the size of the paper feed cassette 3. When the paper feed cassette 3 longer than the depth of the housing 1 is mounted, the cover 31 is pushed by the rear surface of the paper feed cassette 3 and rotates while opening the rear opening surface of the cassette storage chamber 25. The upper surface opening of the sheet feeding cassette 3 at the portion projecting from the rear surface 30 of the first sheet is closed.

Effect of the Invention As described above, according to this invention, the stopper is formed in the cassette storage chamber so as to abut against the sheet feeding cassette and to align the sheet feeding position of the sheet feeding cassette with the sheet feeding position of the sheet feeding roller.
Regardless of the size of the paper feed cassette, the paper feed position of the paper feed cassette in the cassette storage chamber is set by the stopper so that it coincides with the paper feed position of the paper feed roller. Since the rear surface of the storage chamber is open, you can insert a paper cassette that is longer than this depth even if you make the depth of the housing small. Because it is attached and detached,
Other devices can be placed in close contact with each other on the left and right sides of the housing, and because the cover is openable and closable on the rear surface of the housing, you can use the cover to prevent the paper cassette from protruding from the housing. The opening can be closed, and even if the paper feed cassette projects from the housing, the upper surface of the paper feed cassette can be covered with a cover to protect the stored paper from dust and the like. Have.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a vertical sectional side view, and FIG. 2 is a horizontal sectional view of a lower part of a housing. 1 ... Housing, 2 ... Printing section, 3 ... Paper feed cassette, 4 ...
... Paper feeding path, 6 ... Paper discharging path, 8 ... Paper feeding roller, 9-
12 …… Paper feed section, 25 …… Cassette storage room, 28 …… Stopper, 29 …… Front surface of housing, 30 …… Back surface of housing

Claims (1)

[Scope of utility model registration request] 1. A paper feed path, a printing unit, and a paper discharge path are sequentially arranged in the housing from front to back, and a paper feed unit is arranged in the paper feed path and the paper discharge path. A front face and a rear face thereof are opened in the lower part of the body so as to allow passage of the paper feed cassette to form a cassette storage chamber into which the paper feed cassette is detachably inserted from the front side, and the front of the cassette storage chamber A paper feed roller that contacts the paper in the paper feed cassette is provided between the paper feed path, and the paper feed position of the paper feed cassette and the paper feed roller are in contact with the paper feed cassette in the cassette storage chamber. A stopper that matches the sheet feeding position of the cassette storage chamber, closes the opening on the rear surface of the cassette storage chamber, and is pressed and opened by the projecting sheet cassette stored in the casing and the casing of the sheet cassette. Hippo that covers the upper surface protruding from the body Printing apparatus characterized by comprising a rotatably.