Image data processing apparatus

Abstract: A single facsimile apparatus performs both transmission and reception. A conventional facsimile apparatus, therefore, needs to have a paper feed mechanism for transmission to convey an original document read by an image sensor and another paper feed mechanism for reception to convey a recording sheet to be printed by head print image data on it, and as a result, its body has been large in size. A facsimile apparatus by the present invention has a single conveying roller (28) in it, which an image sensor (26) is set above and a printing head (29) is set below. Pressing pins (46, 47, 48, 49) are set respectively near the upper and lower ends of components (43, 44) supporting the conveying roller (40) to freely rotate. In transmission, the lower pressing pins (46, 48) keep away the printing head (29) from the conveying roller (40) and the image sensor (26) presses an original document (57) onto the conveying roller (40). In reception, the upper pressing pins (45, 47) keep away the image sensor (26) from the conveying roller (40) and the printing head (29) presses the recording paper (31) onto the conveying roller (40). In this way, structure of the facsimile apparatus (21) is simplified.

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus preferably used for a facsimile communication apparatus or the like. 2. Description of the Prior Art A facsimile apparatus has been often used as means for transmitting and receiving image data through public line. A facsimile apparatus reads an original document to be transmitted with such a reading means as a CCD (Charge Coupled Device) or the like, and transmits the obtained image data through a public line. A facsimile at the receiving side prints out the image data, using a thermal imaging means called a thermal printer for example. Such a facsimile apparatus as above is made as a single apparatus to perform both transmission and reception. It, therefore, needs a driving mechanism to convey a document as making the reading means read it in transmission, and also needs a driving mechanism to convey a recording sheet as making the printing means print an image on it in reception. Figures 1 and 2 show configuration of a reading portion 1 and a recording portion 2 of an example of conventional facsimile apparatus, respectively. As shown in these figures, the reading portion 1 comprises a back roller 4 and a reading glass 3 of transparent glass, and an original is pressed closely to the reading glass 3 by the back roller 4. This back roller 4 is rotated by a driving power transmitted from a motor 5 through a reduction gear 6. The reading means 7 of the CCD or the like is located at the opposite side of the reading glass 3 to the back roller 4. In the recording portion 2, a recording sheet is conveyed in the direction of arrow 8 and is pressed closely to such a recording head 9 as a thermal head by a platen roller 10. This platen roller 10 is rotated by a driving power transmitted from a motor 11 through a reduction gear 12. A conventional facsimile apparatus as mentioned above needs to be provided with motors 5 and 11, reduction gears 6 and 12, and a back roller 4 and a platen roller 10 for a reading portion 1 and a recording portion 2, respectively. As a result, it has been large in the number of parts and in size of its body. Another type of prior art facsimile device disclosed in US-A-4750046, was reading and recording head assemblies which are separately movable to a roller portion located therebetween. This device also requires two drive mechanisms for moving said reading and recording head assemblies. SUMMARY OF THE INVENTION An object of the present invention is to provide an image data processing apparatus to resolve the above-mentioned problems and to particularly miniaturize its body as well as to greatly reduce the number of parts. The present invention provides an image data processing apparatus characterized by comprising; a reading means which is moved in the directions intersectional to the conveying direction of an original document and orthogonal to its image plane, and pressed onto the original document to read it and output its image data, a printing means which is moved in the directions along the moving directions of a reading means and pressed onto the recording paper to print out image data on it, and a working member which is located between the reading means and the printing means and keeps away one of the reading means and the printing means from the working members when the other of them is pressed onto the working members. In a preferred embodiment a roller portion is located between the reading means and the printing means, and is to come into contact with them. In a further preferred embodiment end components supporting the roller portion freely in rotation are located at both axial ends of the roller portion, are provided with first working pins facing the reading means and second working pins facing the printing means, the first working pins set at locations where the first pins are pressed onto and detached from the reading means, corresponding to the first state of predefined angular motion of the end components and the second state in the reverse direction of the first state, and the second working pins set at locations where the second pins are detached from and pressed onto the printing means, corresponding to the first state of predefined angular motion of the end component and the second state. In another preferred embodiment, the end components are provided with a driving means for bringing themselves into the first and second states of angular motion. In an image data processing apparatus according to the invention, a reading means comes into contact with a working member and a printing means is kept away from it in case of reading an original document. Reading of the original is performed by conveying an original document through between this reading means and the working member. On the other hand, in case of printing out image data, the printing means comes into contact with the working member and the reading means is kept away from it. Printing out image data is performed by conveying a recording sheet through between this working member and the printing means. In this way, both operations of reading an original document and printing out image data can be performed by alternate contact of the reading means and the printing means with the working member. Thereby it need not to be separately provided with driving mechanisms to carry an original document and a recording sheet for the reading means and the printing means, respectively. As a result, structure of the apparatus can be greatly simplified and also the number of parts can be remarkably reduced. BRIEF DESCRIPTION OF THE DRAWINGS These objects, the other objects, features, and merits of the invention will be clarified more expressly by the following detailed descriptions and drawings. Figures 1 and 2 are figures showing a typical and conventional configuration; Figure 3 is a figure to illustrate configuration of an embodiment of the invention; Figure 4 is a perspective view showing a configuration pertaining to a roller 28; and Figure 5 (1) is a sectional view of a facsimile apparatus 21 in transmission, Figure 5 (2) is a sectional view of the facsimile apparatus 21 in reception. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to the drawings, a preferred embodiment of the invention is described in details below. Figure 3 is a sectional view showing configuration of a facsimile apparatus 21 which is an embodiment of an image data processing apparatus of the invention, and Figure 4 is a perspective view of a portion of it. Referring to Figures 3 and 4 together, the facsimile apparatus 21 is explained. In a housing 22 of the facsimile apparatus 21, an original document feeding rollers 24 are provided to draw original documents set on a document hopper 23 of the housing 22 one by one into the apparatus. A guide plate 25 and a reading means made of a CCD or the like are located at the downstream side of the document feeding rollers 24 in the conveying direction A1. The reading means 26 is pressed toward a roller 28 by such a pressing means 27 as a spring or the like. A printing means 29 made of a thermal head or the like is located at the opposite side of the roller 28 to the recording means 26. The printing means is pressed toward the roller 28 by such a pressing means 30 as a spring or the like. A roll 32 of recording paper 31 used for printing by the printing means 29 is put in the housing 22. The recording paper 31 from the roll 32 is led in between the printing means 29 and the roller 28 via a guide plate 33, and printing is performed there. Guide plates 34 and 35, and discharge rollers 36 and 37 are located respectively at the downstream sides of the reading means 26, roller 28 and printing means 29 in the conveying direction A1. A read original document and a printed recording sheet 31 are discharged outside of the housing 22 through outlets 38 and 39, respectively. The roller 28 has a roller portion 40 and a pair of working members 41 and 42 which are set at both axial end portions of the roller portion 40, respectively. The working members 41 and 42 respectively consist of end components 43 and 44 set on the roller portion 40, one and the other pairs of working pins 45 and 46, and 47 and 48 which are located respectively at the circumferential position corresponding to each other on the end components 43 and 44, and driving arms 49 and 50 as a driving means which continuously form respectively on the end components 43 and 44, and those working members 41 and 42 are reciprocated by unshown mechanisms in the directions of arrows B1 and B2. Namely, the working members 41 and 42 are given angular motion corresponding to reciprocation of the driving arms 49 and 50 in the direction of arrow B1 or B2. Working pins 45 and 47 make the first working pins, and working pins 46 and 48 make the second working pins, respectively. The reading means 26 is provided with a covering plate 51, in whose axial end portions protrusions 52 and 53 are formed at the locations where angular motion of the working members 41 and 42 in the direction of B1 or B2 makes working pins 45 and 47 be pressed onto or detached from the protrusions 52 and 53. In the same way the printing means 29 is also provided with a covering plate 54 and its protrusions 55 and 56. The protrusions 55 and 56 are formed at the locations where angular motion of the working portions 41 and 42 in the direction of B1 or B2 makes working pins 46 and 48 be released from or pressed onto the protrusions 55 and 56. The roller portion 40 passes through the end component 43 so that it may rotate freely, and a driving gear 58 is set on an end of the roller portion 40. The driving power transmitted from the motor 59 to this driving gear 58 through a reduction gear 60 makes the roller portion 40 rotate. Figure 5 is a figure to illustrate operation of the facsimile apparatus 21 of the embodiment of the invention. Figure 5 (1) shows a state of the facsimile apparatus 21 in transmission. At this time the driving arms 49 and 50 are moved in the direction of arrow B2, and the working members 41 and 42, therefore, are turned in the direction of arrow B2 to come into the second state of angular motion. As a result, the working pins 45 and 47 are detached from the reading means 26, which is pressed onto the roller portion 40 by a pressing force of the pressing means 27. An original document 57 is read when it passes through between this reading means 26 and the roller portion 40 in the direction of arrow A1. At this time, the printing means 29 is moved by the working pins 46 and 48 in the direction of arrow D1 against a pressing force of the pressing means 30, to be detached from the roller portion 40. Figure 5 (2) shows a state of the facsimile apparatus 21 in reception. In reception, the driving arms 49 and 50 are moved in the direction of arrow B1, and therefore, the working members 41 and 42 also are turned in the direction of arrow B1 to come into the first state of angular motion. At this time, the reading means 26 is moved by the working pins 45 and 47 in the direction of arrow C2, to be detached from the roller portion 40. On the other hand, the working pins 46 and 48 are detached from the printing means 29, which is pressed onto the roller portion 40 by a pressing force of the pressing means 30. In this state, received image data is printed on the recording paper 31 when it passes through between the roller portion 40 and the printing means 29. In the embodiment of the invention, as mentioned above, the facsimile apparatus 21 has been configured to use single combination of the roller 28, driving gear 58, reduction gear 60, and motor 59 in order to perform a read operation of an original document 57 in transmission and a print operation onto a recording sheet 31 in reception. As a result, structure of the apparatus can be greatly simplified and the number of parts can be remarkably reduced, compared with conventional facsimile apparatuses. The present embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description and all changes which come within the meaning and the range of equivalency of the claims are therefore intended to be embraced therein.

Claims: An image data processing apparatus comprising; a reading means (26) which is moved in the directions intersectional to the conveying direction of an original document (57) and orthogonal to its image plane, and pressed onto the original document (57) to read it and output its image data, a printing means (29) which is moved in the directions along the moving directions of a reading means (26) and pressed onto the recording paper (31) to print out image data on it, the apparatus being characterised by further comprising a working member (41, 42) which is located between the reading means (26) and the printing means (29) and keeps away one of the reading means (26) and the printing means (29) from the working members (41, 42) when the other of them is pressed onto the working members (41, 42). An image data processing apparatus according to claim 1, wherein a roller portion (40) is located between the reading means (26) and the printing means (29), and is to come into contact with them. An image data processing apparatus according to claim 2, wherein end components (43, 44) supporting the roller portion (40) freely in rotating are located at both axial ends of the roller portion (40), are provided with first working pins (45, 47) facing the reading means and second working pins (46, 48) facing the printing means (29), the first working pins (45, 47) set at locations where the first pins (45, 47) are pressed onto and detached from the reading means (26), corresponding to the first state of predefined angular motion of the end components (43, 44) and the second state in the reverse direction of the first state, and the second working (46, 48) pins set at locations where the second pins (46, 48) are detached from and pressed onto the printing means (29), corresponding to the first state of predefined angular motion of the end component (43, 44) and the second state. An image data processing apparatus according to claim 3, wherein the end components (43, 44) are provided with a driving means (49, 50) for bringing themselves into the first and second states of angular motion.

Inventors: HAYASHI MOTOHIKO, SAKAI KATSUYUKI, SHIMONAGA SADAAKI, SHIRAISHI KENICHI, HAYASHI, MOTOHIKO, SAKAI, KATSUYUKI, SHIMONAGA, SADAAKI, SHIRAISHI, KENICHI
Applicants: SHARP KK, SHARP KABUSHIKI KAISHA
Application year: 1989
Main classification: H04N1
IPC codes: H04N1