JP3197365B2 - Equipment using seats - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a device that uses a sheet such as a sheet of paper or a film, such as a copier, a facsimile, and a printing machine.

[0002]

2. Description of the Related Art Conventionally, for example, in a laser printer, as shown in FIG. 11, a first housing such as an image recording apparatus main body 1 and a paper feeder for feeding sheets to the image recording apparatus main body 1 are provided. The image recording apparatus main body 1 includes a second housing such as the apparatus 2, and the positioning pins 3 of the paper feeding apparatus 2 are fitted and positioned in positioning holes (not shown) of the image recording apparatus main body 1.
Is mounted on the upper surface of the sheet feeding device 2 and installed. When recording on a sheet, the sheet in the sheet feeding device 2 is fed from the sheet distribution port 4 into the image recording apparatus main body 1 through a sheet distribution port (not shown) of the image recording apparatus main body 1.

[0003]

However, in such a laser printer, the main body 1 of the image recording apparatus is connected to the paper feeding apparatus 2.
Since the positioning pins 3 and the positioning holes are not visible when the device is mounted on the device, it has been difficult to fit and position them. Then, there is a problem in that the image recording apparatus main body 1 is mounted on the sheet feeding device 2 with the positioning pins 3 and the positioning holes being displaced, and the positioning pins 3 are broken.

[0004] In order to prevent such breakage of the positioning pin, some conventional laser printers include one shown in FIG.
As shown in FIG. 2, the positioning pin 5 is urged in a protruding direction by an urging member 6 so as to be provided on the upper surface of the sheet feeding device 2 so as to be able to protrude and retract. When the main body 1 of the image recording apparatus is placed on the paper feeding device 2, the positioning pin 5 is immersed in the paper feeding device 2 against the urging force of the urging member 6 (Japanese Patent Laid-Open No.
No. 114065).

However, in such a conventional laser printer, the image recording apparatus main body 1 is installed on the paper feeder 2 with the positioning pins 5 and the positioning holes 7 being displaced from each other.
In some cases, the sheets were jammed due to the deviation of the sheet distribution ports.

Accordingly, an object of the present invention is to provide a first case such as a main body of an image recording apparatus, which is mounted on the upper surface of a second case such as a paper feeder and installed. Is easily fitted into the other positioning hole for positioning.

[0007]

Therefore, according to the first aspect of the present invention, one of the positioning pins 50 is fitted into the other positioning hole 47 and positioned, as shown in the following embodiment. In a sheet-using apparatus in which a first housing such as the recording apparatus main body 10 is placed and installed on the upper surface of a second housing such as the sheet feeding device 25 , a stay is provided on the first housing.
The stay 46 is provided with a foot portion 48 and an engagement portion 49.
On the other hand, a bracket 52 is provided on the second housing.
The bracket 52 on the second housing.
When the first housing is placed, the stay 46 of the first housing is
The abutted surface 53 to be abutted and the abutted surface 53
And at a right angle to engage with the engaging portion 49 of the stay 46,
Engaging portion 54 for restricting vertical movement of the first housing
And an engaging portion 49 of the stay 46 and
With the engagement portion 54 of the bracket 52 engaged,
When the positioning pin 50 and the positioning hole 47 are fitted,
Thus, the engagement between the engagement portions 49 and 54 is prevented from being released .

According to a second aspect of the present invention, in the sheet using apparatus according to the first aspect, for example, as in the following illustrated embodiment, the first housing is the image recording apparatus main body 10, and The second housing is a sheet feeding device 25 for feeding a sheet S to the housing.

According to a third aspect of the present invention, in the sheet using apparatus according to the first aspect, the first housing feeds a sheet to the image recording apparatus main body 10 as in the following illustrated embodiment. And the second housing is another sheet feeder 26 that feeds the sheet S to the image recording apparatus main body 10.

[0010]

According to the present invention, when the first housing is mounted on the upper surface of the second housing, the first housing is placed on the second housing from a direction along the upper surface. It is placed and abuts against the abutted surface 53 of the second housing, and
After restricting the first housing from moving along the upper surface in the direction orthogonal to the abutting direction by engaging the engaging portion 54 with the
One positioning pin 50 is fitted into the other positioning hole 47 for positioning.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is a schematic configuration diagram of the entire internal mechanism of the laser printer according to one embodiment of the present invention.

The laser printer of the illustrated embodiment comprises three housings including an image recording apparatus main body (printer main body) 10, a paper feeding device 25, and another paper feeding device main body 26. The sheet feeding device 25 is placed, and the image recording apparatus main body 10 is placed on the sheet feeding device 25.

In the main body 10 of the image recording apparatus, a belt-shaped photosensitive member 12 is provided substantially at the center. Around the photoreceptor 12, the chargers 1 are sequentially arranged in the driving direction indicated by the arrow in the figure.
3. The developing device 14, the transfer device 15, and the cleaning device 16 are arranged. An optical writer 17 is disposed above the photoconductor 12 and the cleaning device 16. On the other hand, transfer device 1
5, a sheet cassette 19 containing sheets S is provided so as to be freely inserted and removed from the front surface (the left side in the figure).
The sheet feeding cassette 19 is provided with a sheet conveying path 20 vertically penetrating in a handle 19a on the left side in the figure and a sheet feeding path 21 branched from an upper part of the sheet conveying path 20. A paper feed roller 37 is arranged near the entrance of the paper feed path 21.

The above-mentioned paper feeding device 25 and paper feeding device 26
Paper cassette 2 in box-shaped outer cases 27 and 28
9.30 is provided so that it can be freely inserted and removed from the front. In the sheet cassettes 29 and 30, similarly to the sheet cassette 19, sheet conveyance paths 31 and 32 are provided in the left handle portions 29 a and 30 a on the left side in the drawing, and are vertically provided.
Paper feed paths 33 and 34 are provided, branching from the upper portions of the sheet transport paths 31 and 32, respectively. Then, the sheet transport path 20 of the paper cassette 19 and the upper paper cassette 29
And the sheet conveying path 32 of the lower sheet cassette 30 are connected to each other. Also,
Paper feed rollers 35 and 36 are provided near the entrances of the paper feed paths 33 and 34, respectively.

When recording on a sheet, the appropriate feeding rollers 35, 36 and 37 are driven to rotate so that the sheet S is fed from the corresponding sheet cassettes 19, 29 and 30 to the sheet feeding path. Pay out through 21.33.34. At this time, the sheet S in the sheet cassette 29 is conveyed via the sheet conveyance path 20 of the sheet cassette 19 above the sheet S, and the sheet S in the sheet cassette 30 is
The sheet is conveyed via the sheet conveyance path 20 and the sheet conveyance path 31 of the sheet cassette 29. Then, the sheet S to be conveyed
Is abutted against a registration roller 40 in the image recording apparatus main body 10 and stopped, and is conveyed to the lower side of the photoreceptor 12 at a timing by the registration roller 40. The photoconductor 12 is driven in a counterclockwise direction in the drawing. At this time, the surface is uniformly charged by the charger 13, and the photoconductor 12 is irradiated with the laser light L from the Form an image. This latent image is
When passing through the position of the developing device 14, the toner adheres to form a visible image. Then, this visible image is transferred onto the upper surface of the sheet S by the transfer device 15.
Transfer by After the image transfer, the sheet S is conveyed to the fixing device 41, and the fixing device 41 applies heat and pressure to fix the transferred image on the sheet S. The sheet S that has left the fixing device 41 is
Further, the sheet is conveyed by the sheet discharge roller 42 and discharged in the direction B or C shown by the arrow.

On the other hand, the surface of the photoreceptor 12 after image transfer is
The residual toner is removed by cleaning with the cleaning device 16, and then the charge is removed by the charge remover.

In the laser printer of the illustrated embodiment, a paper feeder 25 is placed on a paper feeder 26, and the image recording apparatus main body 10 is positioned and installed on the paper feeder 25 in FIG. The configuration is as shown.

As shown in FIG.
On the lower surface of the sheet feeding device 25 and another sheet feeding device 26, a front stay 45 and a rear stay 46 are respectively arranged so as to span between the front and rear left and right side plates of each outer case 22, 27, 28. Become. Before that, as shown in FIG.
The outer edge 45a of the elongated plate is bent slightly into a box shape, and positioning holes 47 are provided at both ends thereof, and rubber or plastic feet 48 are screwed to lower surfaces of the both ends. The rear stay 46 is formed by bending the outer edge 46a of the elongated plate slightly into a box shape, and forming the outer edge 46a on the rear side.
a At the center, a concave engaging portion 49 is provided, and rubber or plastic feet 48 are screwed to lower surfaces of both ends. Then, as shown in FIG. 1, the left and right ends of each front stay 45 are provided by welding to the left and right side plates at the front of each of the outer cases 22, 27, and 28. The left and right ends of each of the rear stays 46 are provided by welding to the left and right side plates at the rear of each of the outer cases 22, 27, and 28, and the engaging portions 49 are provided.
28 are provided on the rear surface, respectively.

On the other hand, as shown in FIG.
And another sheet feeding device 26, each of the outer cases 27 and 28
A pair of left and right positioning pins 50 are provided so as to protrude from the upper surface of the front part, and brackets 52 are provided at the rear ends of the outer cases 27 and 28. As shown in FIG. 2, the positioning pin 50 has a small-diameter neck portion 50a at a substantially middle height. On the other hand, the bracket 52 is provided with the abutted surface 53 at right angles to the upper surface of the rear end portion, and is provided with the engaging portion 54 by bending the upper end portion inward at right angles.

As shown in FIG. 3, when the image recording apparatus main body 10 is placed on the upper surface of the sheet feeding device 25 and installed, the image recording device main body 10 is placed on the sheet feeding device 25 from a direction along the upper surface. The rear part of the main body 10 is placed. Then, with regulating the movement along the upper surface of the image recording apparatus body 10 abutted against the image recording apparatus body 10 to the abutted surface 53, the image recording an engaging portion 54 of the feeder 25 side
The image recording apparatus main body 10 is prevented from moving in the direction orthogonal to the abutting direction along the upper surface by engaging with the engagement portion 49 on the apparatus main body 10 side. Then, when the front portion of the image recording apparatus main body 10 is lowered onto the sheet feeding apparatus 25, the positioning pins 50 are fitted into the positioning holes 47 as shown in FIG. Position.
Thereafter, the user inserts his hand through the insertion slot 10a of the paper feed cassette 19 shown in FIG. 1, and attaches the snap 56 shown in FIG. 2 to the small diameter neck portion 50a of the positioning pin 50 as shown in FIG. The device 25 is fixedly connected.

When the image recording apparatus main body 10, the paper feeding device 25, and the paper feeding device 26 are installed, when the paper feeding device 25 is mounted on the paper feeding device 26 placed on the table 58 and positioned, the above-described operation is performed. The rear part of the paper feeding device 25 is placed on another paper feeding device 26 from the direction along the upper surface and abuts against the abutted surface 53 in the same manner as the procedure for installing the image recording apparatus main body 10 on the paper feeding device 25. And restricting the movement of the sheet feeding device 25 in the direction along the upper surface, and engaging the engaging portions 49 and 54 to move the sheet feeding device 25 along the upper surface in a direction orthogonal to the abutting direction. Is regulated, the front portion of the sheet feeding device 25 is lowered onto another sheet feeding device 26. Then, the positioning pin 5
0 fit into the positioning holes 47 respectively. After that, the snap 56 is attached to the positioning pin 50.

In the above-described embodiment, when the image recording apparatus main body 10 is placed on the sheet feeding device 25 and installed, the image recording apparatus main body 10 moves along the upper surface in a direction orthogonal to the abutting direction. The engaging portions 49 and 54 for restricting this are constituted by a concave portion of the rear stay 46 and a bent piece of the bracket 52. However, as shown in FIG. 6A, an engaging pin is provided on the rear stay 46 side to form an engaging portion 49, and a pin hole for engaging the engaging pin is provided in the bracket 52 to form an engaging portion 54. Alternatively, as shown in FIG. 6B, an engaging pin may be provided on the bracket 52 to form the engaging portion 54, and a pin hole may be provided on the rear stay 46 side to form the engaging portion 49. Is also good.

In the embodiment described above, the foot portion 48 is made of rubber or plastic. However, as shown in FIG. 7, the foot portion 48 may be formed integrally with the front stay 45 or the rear stay 46, respectively.

Further, in the above-described embodiment, the foot 48 receives the full load. However, as shown in FIG. 8, the lower portion of the positioning pin 50 below the small-diameter neck portion 50a is an enlarged-diameter portion 50b, and the front stay 45 is engaged with a shoulder portion 50c of the enlarged-diameter portion 50b as shown in FIG. It is also possible to adopt a configuration in which a load is received. And the shoulder 5 of the enlarged diameter portion 50b
Since a load is applied at 0c, even if a rubber or plastic foot 48 is attached to the front stay 45, the deformation of the foot 48 can be prevented.

Further, in the above-described embodiment, the image recording apparatus main body 10, the sheet feeding device 25, and another sheet feeding device 26 are fixedly connected separately from the table 58. But,
As shown in FIG.
And the bracket 52, the table 58 and a plurality of paper feeders 59 mounted on the table 58, and the image recording apparatus main body 1.
0 may be integrally connected.

[0026]

Therefore, according to the present invention, when the first housing is placed on the upper surface of the second housing and installed, the first housing is placed on the second housing from a direction along the upper surface. The first housing is placed and abutted against the abutted surface of the second housing, and the first housing is engaged along the upper surface by engaging the engaging portions with each other. After restricting movement in the orthogonal direction, one positioning pin is fitted into the other positioning hole and positioned, so that positioning can be easily performed. Therefore, it is possible to prevent, for example, the positioning pin from being broken by receiving the load of the first housing or causing a jam at a connection portion of the sheet conveying path due to the displacement.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a laser printer according to an embodiment of the present invention.

FIG. 2 is a perspective view of a front stay, a rear stay, a positioning pin, a snap, and a bracket provided in the laser printer.

FIG. 3 is an explanatory diagram showing a state where the image recording apparatus main body is installed.

FIG. 4 is an explanatory sectional view of the positioning state.

FIG. 5 is a schematic configuration diagram of the entire internal mechanism of the laser printer.

FIG. 6A is a perspective view showing another example of the engaging portion on the image recording apparatus main body side and the paper feeding apparatus side, and FIG. 6B is a perspective view showing still another example.

FIG. 7 is a cross-sectional view showing another example of a foot portion of the front stay and the rear stay.

FIG. 8 is a side view showing another example of the positioning pin.

FIG. 9 is an explanatory sectional view of a positioning state where the positioning is performed using the positioning pins.

FIG. 10 is an explanatory view showing another mounted state of the laser printer.

FIG. 11 is an exploded perspective view of an image recording apparatus main body and a sheet feeding device in a conventional laser printer.

FIG. 12 is a longitudinal sectional view showing a positioning state in another conventional laser printer.

[Explanation of symbols]

 Reference Signs List 10 image recording apparatus main body (first housing) 25 paper feeding device (second housing) 26 another paper feeding device (second housing) 47 positioning hole 49 engagement portion 50 positioning pin 53 hitting Surface 54 engaging part S sheet

Claims (3)

(57) [Claims] 1. A seat-using device in which one positioning pin is fitted and positioned in another positioning hole, and a first housing is placed and installed on an upper surface of a second housing .
A stay is provided on the housing, and a foot and an engaging part are formed on the stay.
On the other hand, a bracket is provided on the second housing,
Place the first housing on the second housing on a bracket
When the stay of the first housing abuts
Abutment surface and the stay
And engages the vertical movement of the first housing.
And an engaging portion for regulating, and
With the mating portion and the engaging portion of the bracket engaged, the
By fitting the positioning pin and the positioning hole,
A seat-using device that prevents disengagement between engaging portions . 2. The sheet-using apparatus according to claim 1, wherein the first housing is a main body of the image recording apparatus, and the second housing is a sheet feeding device that feeds a sheet to the main body. 3. The paper feeding device according to claim 1, wherein the first housing is a sheet feeding device for feeding a sheet to the image recording device main body, and the second housing is another sheet feeding device for feeding a sheet to the image recording device main body. The seat-using apparatus according to claim 1, which is an apparatus.