JPH03166127A - Paper take-in device for printer - Google Patents

Abstract

PURPOSE: To attain guiding and transfer of short individual printing paper, by forming a traction device in parallel to a direction changing roller on the rear side of a printer base plate and a paper guiding passage of the first individual compartment facing the tangential direction against the periphery for the direction changing roller on the traction device so as to be sloped. CONSTITUTION: A printing table 3 is provided above the direction changing roller 2 and the traction device 15 at the deepest position is provided at a printer base plate 1 on the rear side 13 so as to be in parallel to the direction changing roller 2 in the center. A sloped paper guiding passage 24 is provided in the tangential direction of the periphery 23 of the direction changing roller 2, the paper guiding plate for the second individual cut-form compartment 27 extending to the underside of the first individual cut-form compartment 25 is provided, and a paper guiding plate 28 ends immediately before the rear side 29 of the paper guiding passage 24. A printing paper 27a transferred from the second individual cut-form compartment 27 is changed its direction in the rear side 29 and reaches a paper guiding passage 10.

Description

[Detailed Description of the Invention] a. INDUSTRIAL FIELD OF APPLICATION The invention comprises a central deflection roller, and above the deflection roller a printing bed and a print head slit with a laterally movable print head, in which case , a printer, in particular a matrix printer, in which, in the central deflection rotor, the paper guide path for the individual sheets consists of at least one individual sheet compartment with a set of separating rollers and is provided with an indexing device actuated by a nudge motion. Regarding the paper intake device. b. BACKGROUND OF THE INVENTION Such devices are used as an accessory or permanently integrated in printers to form fairly large ticket piles or to stockpile individual tickets with different ticket sizes. ．． In order to alternately use individual sheets and long objects, a traction device is provided consisting of two individual tractors which are actuated by a thrust or pull operation and are adjustable (transversely movable) to the punch hole track spacing. The device mentioned at the outset is known from DE 37 07 886 A1. This known device is adapted to select a reliably working storage compartment that can be used for larger compartment spacings and larger storage compartments. Depending on the direction of rotation of the drive motor, it pivots in mesh with the respective gear of one separating roller of the storage compartment in order to bridge the relatively large compartment spacing provided for fairly thick individual single piles. A dynamically suspended rocking arm has been proposed that can be used to This known device takes measures against sheet piles with large numbers of sheets, and may be suitable for printing large numbers of sheets in continuous operation. Unlike the purpose of known devices,
Modern printers tend to have increasingly compact structures, especially paper guide devices. This is compatible with low-height printers and therefore does not allow traditional high-height paper guides to be combined with low-height printers. Furthermore, on the other hand, special measures have to be taken for printing papers of different lengths and for printing papers of minimum length. In this case, the minimum printed paper length is determined by the distance between each separating roller until it is grabbed by the next pair of rollers. C. OBJECTS TO BE SOLVED BY THE INVENTION The basic problem of the invention is therefore to provide a set of separating rollers which is capable of guiding and transporting individual printed sheets and for a minimum length of printed sheets, i.e. a minimum friction distance. , a paper feeding device having at least one individual sheet compartment is constructed. In this case, shallow depth and low height dimensions are required for the configuration of the individual sheet compartments, so that one or several individual sheet compartments are provided with a corresponding height dimension adapted to the shape of the printer. Design is required. d.
Means for Solving the Problems According to the invention, on the rear side of the printer bottom plate opposite to the printing bed, a traction device is juxtaposed in the deepest position to the central deflection roller, and The solution is that the paper guide path for the first individual compartment, which is oriented tangentially to the circumference of the deflection roller, is arranged obliquely above the traction device. Therefore, extremely short lengths of printed paper are obtained, and lengths of printed paper such as envelopes, postcards, etc. can also be guided and transported. Furthermore, the overall height is low because the individual sheet compartments protrude only very slightly from the upper contour of the printer. With conventional equipment, this low assembly size is not possible because the guide plate is typically located at the bottom of the printer beyond the bottom plate. However, the guide plate and drive motor can be provided on the side of the printer, although the width is greater than the width of the individual printed paper. Implementation 1 of the present invention! A second individual sheet compartment is provided above the recessed traction device, which individual sheet compartment extends at least below the first individual sheet compartment and includes an inclined paper guide. It is designed to end in front of the back side of the aisle. In this way, the upper part of the traction device is bridged and the rear side of the inclined paper guide path serves as an auxiliary guide and direction for the individual printed sheets drawn from the second individual sheet compartment. Used for conversion. Another embodiment of the invention provides for individual ticket storage locations in the upper part of the printing table and the paper guide path.
Further, in this case, the traction device is provided at a deep position, which is convenient for the individual ticket compartment and the individual ticket storage area. Another preferred embodiment provides that at least the first individual sheet compartment and the individual sheet storage area form a transverse unit that can be taken out of the printer upwardly and refitted, in which case the separating roller center is designed to be drive-coupled when inserted into the printer. Placing one or several individual sheet compartments and individual sheet receptacles fairly deep and lowering these structural units considerably lower helps to reduce the overall height of the device. It is valid. This design can be further improved by making it possible to retrofit the second individual sheet compartment together with its associated separating roller device into the component unit. In this way, if only one individual sheet compartment is provided, an already assembled device can be expanded with a second individual sheet compartment to increase the paper storage capacity. e. Embodiments An embodiment of the invention is shown in the figures and will now be described in more detail. The paper intake device of the printer is shown in the embodiment of a matrix twenty-one dollar printer 1, which has a central deflection roller 2. A printing table 3 is provided on the direction conversion roller 2, and a printing head 4 is installed in front of the printing table.
performs reciprocating motion on the print head slit 5 within the print head slit guide 6. The printing table 3 consists of a printing block as shown in the figure, but it can also be a roller-shaped printing table 3. Paper guide channels 9 and lO are formed on the central deflection roller 2 by abuttable rollers 7 and 8, in which case a fixed guide element l1 can also be chosen. There is a discharge roller set 12 on the printing table 3. On the printer bottom plate 14 on the rear side l3, a traction device 15 located at the deepest position is juxtaposed with the central direction changing roller 2. The traction device 15 comprises a base frame 16, at least two housings l7 arranged side by side, a flapper force bar 18 provided on each housing l7, and a transfer pin 20.
It consists of a drive belt 19 with a The housings 17 are supported on rotationally driven rods 2l each having a polygonal cross section. Furthermore, the housing 17 is prevented from rotating by the torque bin 22 in the base frame 16, but can move perpendicular to the view of FIG. A paper guide channel 24 provided after the first individual sheet compartment 25 with a set of drivable separating rollers 26 arranged tangentially to the circumference N23 of the central deflection roller 2 is located below the traction device 15. be. Towing device 1f1 deep inside
Above 5 is a second individual sheet compartment 27 with a drivable separating roller separator 26. This second individual sheet compartment 27 can be operated independently together with the separation roller set 26 to which it belongs, as will be explained in more detail below. A paper guide Fi 28 for the second individual sheet compartment 27 extending at least below the first individual sheet compartment 25 is provided above the traction device 15 in the deep part, and this paper guide plate 28 The inclined paper guide channel 24 ends just before the rear side 29, so that the printing paper 27a transferred from the second individual sheet compartment 27 is redirected on the rear side 29 and left in the paper guide channel for intake. Reach 10. Paper guide board 28
is fixed in the individual ticket compartment chamber 27. Above the printing platform 3 and the paper guide path 24 there is sufficient space for individual ticket storage locations 30 without unduly increasing the height of the device. However, the scaffolding for such individual ticket storage areas can be folded to the other side. As shown in the figure, the individual ticket compartment (25) and the individual ticket storage place 30 can be taken out upward from the printer 1 and refitted, as shown in the dashed line in green in FIG. They form the Precept Unit 31. The structural unit 31 is supported by a frame 32 (FIG. 2) of the printer 1 that fixes the position of the structural unit 31. Second
As seen in FIG. 3 and FIG. 3, when the structure unit 31 is fitted into the printer I, the separation roller set 26 is automatically and transmission-coupled by a coupling device 33 consisting of gears in this figure. A similar precept is the basic configuration unit 34.
This also applies to . Similarly, the second individual sheet compartment 27 together with the separating roller set 26 to which it belongs forms an independent base structure unit 34, which base structure unit 34 can be fitted later into the structure unit 31. Is possible. The basic structure unit 34 can also be seen in FIG. 1 by the dashed line and is supported by the structure unit 31. This forms a special frame 35.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of the invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a side view of the device according to the invention with a coupling device. l...Printer,
2... Direction conversion roller, 3... Printing table,
l3... Rear side, 14... Printer bottom plate, 15.
... Traction device, 23... Around the direction conversion roller,

Claims (1)

Claims: 1) a central deflection roller, and above the deflection roller there is a printing bed and a print head slit with a laterally movable print head, in which case: For printers, especially matrix printers, in the central deflection rotor, the paper guide path for the individual sheets consists of at least one individual sheet compartment with a set of separating rollers and is provided with an indexing device actuated by a nudge motion. In the paper intake device, the rear side (
13), the traction device (15) has a first traction device (15) juxtaposed to the central deflection roller (2) in its deepest position and oriented tangentially with respect to the circumference (23) of the central deflection roller (2). paper guide path (24) for the individual ticket compartment (25)
) is provided obliquely above the traction device (15), for a paper intake device for a printer, in particular a matrix printer. 2) Above the deep traction device (15) a second individual single compartment (27) is provided, which separates the individual single compartment (2).
7) extends at least below the first individual sheet compartment (25) and extends on the rear side (29) of the inclined paper guide path (24).
2. A paper intake device for a printer according to claim 1, characterized in that the device terminates in front of the printer. 3) Paper for the printer according to claim 1 or 2, characterized in that there is an individual ticket storage place (30) above the printing table (3) and the paper guide path (24). Capture device. 4) A structural unit (31) in which at least the first individual sheet compartment (25) and the individual sheet storage place (30) can be taken out upwards from the printer (1) and fitted again.
according to any one of claims 1 to 3, characterized in that the separation roller set (26) is drive-coupled when inserted into the printer (1). equipment. 5) The second individual sheet compartment (27), together with the separating roller set (26) to which it belongs, is connected to the component unit (31).
5. The paper feed device for a printer according to claim 4, wherein the paper feed device can be fitted into the printer later.