JP4403761B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus, and more particularly, to an apparatus suitable for a small printer that is small and thin in the depth direction.

  In recent years, with the spread of personal computers, printers have also been placed in shops such as personal desks, restaurants, and services. Such a printer is required to have not only a structure and a function as a simple office device such as a small size but also an interior property.

  From the viewpoint of the interior of the printer, the conventionally known structure has a structure in which the paper feed tray and the paper discharge tray come out of the apparatus casing. As a machine configuration that can be stored, it is thought that not only interior properties but also product value can be increased.

  However, there are some paper trays that can be accommodated within the size of the device housing by folding the trays that protrude in different directions, for example, the front and back sides of the device housing. The present inventor is not aware of a printer that can fold a plurality of trays facing in a direction (for example, the front side) and store it in the apparatus housing. In addition, there is no one that can completely store the tray in the apparatus casing, or one that can be folded so that the tray covers the opening of the apparatus casing.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feed tray, a paper discharge tray, and the like that can be stored outside the apparatus casing in the apparatus casing size, and that can enhance both interior and commercial value. And

An image forming apparatus according to claim 1 of the present invention, the positive side of the device housing having a feed port, possible and or substantially along along the positive face out opening from the apparatus housing to the outside In an image forming apparatus including a paper feed tray and a paper discharge tray that can be stored,
The pivot point position of each tray, made different in the depth direction from the positive side in the height direction and the device housing of the positive surface of the apparatus housing,
The rotation fulcrum position of the outermost sheet feeding tray is arranged at the lowest position in the height direction of the apparatus housing and arranged at the outermost position in the depth direction,
The pivot point position of the discharge tray, raise the height position in the depth direction of the apparatus housing and while distribution inwardly depth direction,
The paper feed tray has a side fence that is movable in the width direction of the front of the device housing and protrudes toward the back of the device housing in a state of being housed in the device housing.
The rotation fulcrum of the paper feed tray is constituted by an inner hinge structure provided in the apparatus casing,
The side fence is disposed in the vicinity of the rotation fulcrum position by the inner hinge structure when viewed from the side of the apparatus housing, and the part of the apparatus housing that stores the side fence is a sheet feeding port from the sheet feeding tray. a,
It is characterized by that.

According to a second aspect of the present invention, in the image forming apparatus of the first aspect, the paper feed tray has an end fence provided with a portion that protrudes toward the back side of the apparatus casing in a state of being housed in the apparatus casing. The sheet discharge tray can be stored by being rotated in the depth direction of the apparatus housing by an angle larger than the angle corresponding to the protruding dimension of the protruding portion of the end fence .

According to a third aspect of the present invention, in the image forming apparatus according to the second aspect, parts, members, and the like that are adjacent to the paper discharge tray in the depth direction of the device casing are disposed when the paper discharge tray is stored. an oblique surface portion corresponding to the pivot angle, characterized in that it has a positive side of the apparatus housing.

The image forming apparatus according to the present invention, instrumentation is also closed can regardless opening portion of the positive surface having a feed port of置筐body in the paper feed tray comprises end fence, and enables to exhibit the appearance neat In addition, it is compact and can reduce the depth dimension when storing the paper feed tray and the paper discharge tray .

  The best mode for carrying out the present invention will be described below with reference to the embodiments shown in the drawings. The image forming apparatus described below is an ink jet printer, but the present invention is not limited to this, and can be applied to various image forming apparatuses.

  FIG. 1 is a cross-sectional view showing an ink jet printer as an embodiment of an image forming apparatus according to the present invention. FIG. 1 is a cross-sectional view when used (A) and a cross-sectional view when storing a tray (B), and FIG. 1A is a perspective view of the state of FIG. 1A, and FIG. 2B is a perspective view of a state in which the side tray on the paper feed tray is easily seen by omitting the paper discharge tray and the inner cover. The ink jet printer of the present embodiment is of a type that can be installed on a small desktop, and the apparatus housing has a substantially rectangular parallelepiped outer shape, leaving the front opening 1, the upper surface portion 2, the rear surface portion 3, and the side surface portion. 4, 4 and the bottom surface portion 5 are formed into a box shape with, for example, a synthetic resin material, an operation portion 6 such as a button switch is provided on the front side of the top surface portion 2, and the front opening 1 is formed with a pair of side covers 7, 7 And the paper feed tray 10 so that the inside of the apparatus housing can be sealed.

  The inside of the apparatus housing is partitioned into two upper and lower stages by a structural member 11 provided in a state of being stretched between the side surface parts 4 and 4, and a sheet fed from the paper feed tray 10 below the structural member 11. A sheet feeding port 12 and a sheet feeding space 13 for mounting the bundle P are formed. A paper feed roller 14 is disposed in the middle of the paper feed space 13 in the depth direction of the apparatus housing in a state of being covered with the structural member 11, and the uppermost position of the bundle P in the paper feed space 13. A pickup roller 15 for feeding paper and a transport roller 16 on the rear side in the paper transport direction are arranged.

  In addition, an ink head 18 having a plurality of ink cartridges 17 mounted thereon is provided above the structural material 11 inside the apparatus housing so that characters, figures, and the like can be printed on paper at a position above the structural material 11. .

  The paper feed tray 10 also serves as an opening / closing member for the front opening 1 of the apparatus housing. Therefore, although detailed illustration is omitted, a rotary hinge 19 is provided in the vicinity of the lower end of the side surface portion 4 or the side cover 7, thereby supporting the base end portion so as to be rotatable in the vertical direction and rotating upward. The front opening 1 can be closed by being fitted between the side covers 7 and 7 and rotated downward to open the front opening 1. This paper feed tray 10 is provided with an end fence 20 at the center for positioning the rear end of the bundle of sheets P to be loaded, and the end 21 at the front end is on the surface on which the bundle of sheets P is placed. It is provided so as to protrude. In addition, what is necessary is just to use a well-known thing for the rotation hinge 19 suitably.

  In addition, a pair of side fences 22 and 22 are provided in the vicinity of the attachment portion of the paper feed tray 10 to the rotary hinge 19 so as to be separated from each other in the width direction of the apparatus housing. The side fence 22 is installed in the guide groove 23 so as to be slidable in the width direction of the apparatus housing in order to receive a bundle P of sheets having a plurality of types of width dimensions. As this moving structure, a known structure may be used as appropriate.

  A paper discharge tray 25 is provided above the paper feed tray 10. The discharge tray 25 is also supported at the base end portion by a rotating hinge 26 provided near the lower end of the side surface portion 4 or the side cover 7 and can be rotated in the vertical direction like the discharge tray 10. The position of the rotary hinge 26 of the paper discharge tray 25 is a position shifted from the position of the rotary hinge 19 of the paper feed tray 10 to the back side of the apparatus housing. The paper discharge tray 25 can be expanded and contracted in two stages so as to correspond to the longitudinal dimension of the paper to be discharged. However, since the structure of this type of paper discharge tray is well known, detailed illustration and description are omitted. . In the figure, reference numeral 27 denotes a paper discharge roller, which is provided on the top of the structural member 11 in order to send out paper on which characters and the like are printed by the ink head 18 onto the paper discharge tray 25. Although detailed illustration of the rotary hinge 26 is omitted, a known one may be used as appropriate.

  An inner cover 28 is provided on the upper side of the paper discharge tray 25. The inner cover 28 also supports a base end portion by a rotating hinge 29 provided near the lower end of the side surface portion 4 or the side portion cover 7, and can be rotated in the vertical direction like the paper feed tray 10 and the paper discharge tray 25. In addition, the ink cartridge 17 and the ink head 18 can be covered from the front side of the apparatus housing. The position of the rotary hinge 29 of the inner cover 28 is shifted from the position of the rotary hinge 26 of the paper discharge tray 25 to the back side of the apparatus housing. It should be noted that a known hinge may be used as appropriate for the rotary hinge 29.

  The usage form of the apparatus having the above-described configuration and the detailed structure will be described. In FIG. 1 (A), the sheet is supplied from the sheet bundle P on the sheet feeding tray 10 to the lower side of the ink head 18 via the sheet feeding roller 14, the pickup roller 15, and the conveying roller 16. FIG. 1B shows a state in which characters and the like are printed and can be discharged onto the paper discharge tray 25. From this state, the inner cover 28, the paper discharge tray 25, and the paper feed tray 10 are moved upward. The state which rotated and was accommodated in the apparatus housing | casing is shown. The storage order of the paper feed tray 10 and the like is, of course, first, the inner cover 28 is rotated and stored, the paper discharge tray 25 is finally rotated, and finally the paper feed tray 10 is rotated and stored. If the paper feed tray 10, the paper discharge tray 25, and the inner cover 28 are closed, the front opening 12 can be closed tightly to seal the inside of the apparatus casing, and dust prevention, prevention of ink head drying, and the like can be achieved. An appropriate latch mechanism may be provided in order to prevent the paper feed tray 10, the paper discharge tray 25, and the inner cover 28 from being opened by vibration or the like in a state where the paper feed tray 10, the paper discharge tray 25, and the inner cover 28 are housed as shown in FIG. However, since such a mechanism is well-known, illustration and description are omitted.

  As shown in FIG. 1B, the paper feed tray 10 is stored in an almost upright state, but the paper discharge tray 25 and the inner cover 28 are arranged so that the front surface of the ink cartridge 17 or the ink head 18 faces the depth direction of the apparatus housing. It is made into the shape of the slope inclined to the back side, and it inclines and accommodates along this slope. That is, when the paper feed tray 10 is stored, the end portion 21 of the end fence 20 protrudes greatly toward the back side of the apparatus housing, so that it does not hit this. Of course, the protruding dimension of the end portion 21 can secure a height necessary for its function, and the inclination angle of the paper discharge tray 25 and the like varies depending on the dimension, so the illustrated inclination is an example. In any case, since it is not necessary to employ a complicated structure such as a folding type for the end fence 20, the user and the operator can store the paper feed tray 10 without performing an extra operation. In the example shown in the drawing, the inclination angles of the paper discharge tray 25 and the inner cover 28 are aligned. Of course, the inclination angle of the inner cover 28 may be further increased so that a gap is left between the paper discharge tray 25 and the paper discharge tray 25.

  Since the rotation hinge 19 of the paper feed tray 10 has a so-called inner hinge structure, when the paper feed tray 10 is stored, there is no step between the front side of the apparatus housing between the paper feed tray 10 and the side cover 7. It can be as if they are connected on the same side. Further, depending on the position of the rotation hinge 19 of the paper feed tray 10, the depth dimension of the apparatus housing may be determined by the size of the rotation hinge 19 itself. Therefore, while the rotary hinge 19 is placed inside the apparatus housing, the depth dimension (side surface depth dimension) of the apparatus is made as small as possible, and the front surface of the apparatus housing and the exterior surface of the paper feed tray 10 are not stepped. It is preferable that the exterior surface of the paper feed tray 10 and the side cover 7 are connected in a curved shape having a large diameter to form the front of the apparatus.

  Further, in order to allow the side fence 22 of the paper feed tray 10 to be stored as it is in any position within the guide groove 23, the side fence 22 is disposed close to the rotary hinge 19, and the side fence 22 is also connected to the paper feed port 12. It is configured so as to rotate within the space and to be accommodated in the paper feed slot 12 so as not to interfere with the internal mechanism when the paper feed tray 10 is stored. Further, in order to widen the space of the sheet feeding port 12, the end 11a on the front opening 1 side of the structural member 11 is slightly inclined upward. Even with this structure, the user and the operator can store the paper feed tray 10 without performing extra operations. In this structure, the width size of the side fence 22 (the horizontal dimension in FIG. 1A and the height dimension in FIG. 1B) is restricted to a length that can be accommodated within the height of the paper feed port 12. However, there is no problem in terms of function unless it is separated from the position of the paper feed roller 14 that first acts to pick up the paper.

  The discharge tray 25 may have a complicated convex shape (slope) on the discharge surface in order to ensure the discharge performance. Even in such a structure, the discharge tray 25 and the inner cover 28 This can be dealt with by appropriately setting the deviation of the support position and the inclined angle of the ink cartridge 17 or the ink head 18, and the convex shape of the paper discharge surface can be escaped.

  When the inventor made a prototype of the printer of the above embodiment, when the A4 size is the maximum size of the paper, the depth dimension of the apparatus with the paper feed tray 10 and the like stored is about 145 mm. It was. Since this depth dimension is about the same as that of a standard liquid crystal monitor, it is possible to easily realize such a placement that such a printer is placed on the front side or in front of the desk. In other words, since a standard office desk has a depth dimension of about 700 mm, the above-described printer still has a dimensional margin of 550 mm or more on the desk, and the user has sufficient work space on the desk. It can be secured. Of course, if it is the size as described above, it can be placed on a shelf having a small depth dimension.

1 is a cross-sectional view showing an ink jet printer that is an embodiment of an image forming apparatus according to the present invention; In the same perspective view, a perspective view (A) in the state of FIG. 1 (A) and a perspective view (B) in a state in which the side tray on the paper feed tray is easily seen by omitting the paper discharge tray and the inner cover.

Explanation of symbols

1: Front opening 2: Upper surface portion 3: Back surface portion 4: Side surface portion 5: Bottom surface portion 6: Operation portion 7: Side portion cover 10: Paper feed tray 11: Structural member 11a: End portion 12 of structural member: Paper feeding port 13: paper feed space 14: paper feed roller 15: pickup roller 16: transport roller 17: ink cartridge 18: ink head 19: rotary hinge 20: end fence 21: end portion 22: side fence 23: guide groove 25: paper discharge Tray 26: Rotating hinge 27: Paper discharge roller 28: Inner cover 29: Rotating hinge P: Bundle of sheets

Claims (3)

The positive side of the device housing having a feed port, an image with a possible and above along the positive surface or the paper feed tray and the paper discharge tray capable of housing approximately along out open outwardly from the device housing In the forming device,
The pivot point position of each tray, made different in the depth direction from the positive side in the height direction and the device housing of the positive surface of the apparatus housing,
The rotation fulcrum position of the outermost sheet feeding tray is arranged at the lowest position in the height direction of the apparatus housing and arranged at the outermost position in the depth direction,
The pivot point position of the discharge tray, raise the height position in the depth direction of the apparatus housing and while distribution inwardly depth direction,
The paper feed tray has a side fence that is movable in the width direction of the front of the device housing and protrudes toward the back of the device housing in a state of being housed in the device housing.
The rotation fulcrum of the paper feed tray is constituted by an inner hinge structure provided in the apparatus casing,
The side fence is disposed in the vicinity of the rotation fulcrum position by the inner hinge structure when viewed from the side of the apparatus housing, and the part of the apparatus housing that stores the side fence is a sheet feeding port from the sheet feeding tray. a,
An image forming apparatus. 2. The image forming apparatus according to claim 1, wherein the paper feed tray includes an end fence having a portion that protrudes toward the back side of the apparatus housing in a state of being housed in the apparatus housing, and the discharge tray is connected to the end tray. An image forming apparatus characterized in that the image forming apparatus can be stored by being rotated in the depth direction of the apparatus housing at an angle corresponding to a protruding dimension of a protruding portion of the fence . The image forming apparatus according to claim 2, parts adjacent in the depth direction of the device housing relative to the sheet discharge tray, member or the like, the oblique surface portion corresponding to the rotation angle at the time of the housing of the discharge tray the image forming apparatus characterized by having a positive side of the apparatus housing.

Images