JPH0436075B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a lower guide member that guides a document, that is, paper to be printed (print paper) toward a print line on a print cylinder, and a plate member or a plate member that guides the paper beyond the print line. The present invention relates to a printing paper introduction device comprising a bar member.

Generally, in order to introduce a printing paper into a typewriter, the operator manually guides the document or printing paper towards an upper guide element, avoiding collision with the printing mechanism, and then moves it along the printing line on the printing cylinder. It is necessary to accurately position the paper according to the

The technical problem to be solved by the present invention is to provide a printing paper introducing device which is inexpensive, extremely easy to use, simple in construction, reliable in operation and fast in operation.

The printing paper introduction device according to the present invention for solving the above technical problem is characterized by moving at least a portion of the guide element away from the platen so that the upper edge of the paper engages with the guide element. printing on an area of paper immediately adjacent to the top edge of the paper by actuating a switch to provide a rotary motion to the platen to advance the paper a predetermined distance beyond the print line to move the top edge of the paper to the area where the top edge of the paper is located; This is achieved by providing an actuating element that enables this.

The printing paper introducing device of the present invention is a typewriter,
It can be applied to accounting machines, terminal devices, and other printing devices. In the preferred embodiment described below, the printing paper introducing device 11 (FIG. 1) of the present invention will be described as applied to an electronic typewriter.

This typewriter includes a conventional paper cylinder or platen 12, a lower paper presser roller 13, and an upper paper presser roller 14.
is rotated together with its shaft 16 by an electric motor 17 (FIG. 7) of a line space device (not shown). The line space device is made by Tokkai Sho.
The material disclosed in Japanese Patent No. 56-162678 may be used. The lower paper presser roller 13 (FIG. 1) is supported in a manner known per se and is housed in a slot 18 in a lower paper pressure plate or bar member or guide member 19 fixed to the support 21.

The upper paper pressing roller 14 is slidably mounted on an ordinary bar 22, and this bar 22 has two paper pressing levers consisting of a left lever 23 and a right lever 24 located at both ends of this bar 22. It is fixed at Each lever 23, 24 is connected to a spindle 2
6 and 27 (FIG. 2), and each includes pins 28 and 29 and arm portions 33 and 34. The pins 28 and 29 cooperate with springs 31 and 32 (FIG. 1), and the arms The parts 33 and 34 are fixed stop parts 36 and 3
7 (Figure 2). Each spring 31, 32 (FIG. 1) is attached to a corresponding pin 2 of a lever 23, 24.
8, 29 and pins 38, 39 (FIG. 2) fixed to the typewriter carriage, and these springs, when in the position shown in FIG. Each lever 23, 24 is biased counterclockwise so as to engage the outer surface of platen 12.

The left paper pressure lever 23 has a second arm portion 41 connected to an arm portion 43 of an actuation lever 44 by a pin 42 . The lever 44 has a suitably shaped slot 46 capable of engaging a stationary guide pin 47 and a lug 48 which cooperates with a blade 49 of the switch 51 in certain operating positions as will be described below.

The right paper pressure lever 24 has an upwardly projecting arm 52 terminating in a handle 53 which is grasped by the operator to position the paper introduction device 11 during the introduction operation of a document or print sheet 54 . In operation, the operator grasps the handle 53 and pushes the levers 23 and 23 against the force of the springs 31 and 32.
24 in a clockwise direction, and the pins 28 and 29 are brought to a position 56 shown by a dashed line in the figure. In this position 56, the levers 23, 24 are in an unstable position, the springs 31, 32 are in the dead center position, and the lug 48 of the actuating lever 44 has reached the position 57 indicated by the dash-dotted line. In this position 57, lug 48 is not yet engaged with blade 49 of switch 51, so switch 51 is not actuated. When the operator further rotates the levers 23 and 24 clockwise,
As soon as the position 56 is exceeded, the springs 31, 32 support the rotational movement of the levers 23, 24, and the pins 28, 29 of the levers reach the position 58 shown in dash-dotted lines. In this position 58, the arms 33, 34 engage the corresponding stops 36, 37, and the actuating lever 44
The lug portion 48 reaches a position 59 indicated by a two-dot chain line.
In this position 59, lug 48 engages blade 49 to actuate switch 51.

To return the levers 23 and 24 to their original positions,
The levers 23, 24 are rotated counterclockwise from position 58 toward position 56 against the force of springs 31, 32. Once beyond position 56, springs 31, 32 assist in counterclockwise movement of levers 23, 24, which also cease to move when upper roller 14 engages platen 12.

The switch 51 is connected to an input/output unit 61 (FIG. 7) which is controlled by a central unit 62 connected to a memory 63 and a keyboard 64. The input/output unit 61 has three lines 6
6, 67, 68 and an amplifier 69 to control clockwise rotation, counterclockwise rotation, and stop of the electric motor 17;
Information relating to the open and closed states of switch 51 is received via line 71.

Paper introduction device 11 (FIG. 1) has an upper guide member 76 attached to bar 22 and levers 23, 24 and movable therewith. The upper guide member 76 consists of a bar member or plate member 77 located parallel to the platen 12, and this plate member 77 has two supports 78, 79 ((FIG. 2)) at each end thereof.
and these supports have corresponding levers 23,
24 corresponding sleeve parts 81, 82 and corresponding seats 86 within these sleeve parts 81, 82,
It cooperates with two teeth 83, 84 which are received into 87. Seats 86 and 87 (Fig. 5) have teeth 83 and 84.
It is defined by two shoulders 88, 89 which define the limits of rotational movement (FIG. 2). Each spring 91, 92 attached to each sleeve part 81, 82
One end 93,94 is joined to lugs 96,97 on sleeve portions 81,82, while spring 91,
The other ends 98 and 99 of the guide member 76 are joined to the edges of the corresponding teeth 83 and 84 of the guide member 76. The two springs 91 and 92 are torsion springs, one with a right-handed twist and the other with a left-handed twist, and these springs normally bias the plate member 77 in a counterclockwise direction to cause the teeth 83 and 84 to rotate. It is attached to sleeve parts 81 and 82 so as to be held in engagement with shoulder part 89 (FIG. 6). In such a state, the plate member 7
7 is located slightly away from the outer surface of the platen 12, as shown in FIG. 6, and allows the paper 54 to be guided between the outer surface of the platen 12 and the plate member 77.

The operator grips the handle 53 (FIG. 1) and rotates the levers 23 and 24 clockwise to release the plate member 77.
When the plate member 7 is pulled away from the platen 12, the lever rotates about 30 degrees and then the plate member 7
7, as shown by the dotted line position 102 in FIG.
It engages with a cover 101 of a printing mechanism (not shown). When the operator further rotates the levers 23 and 24 clockwise, the cover 101 is moved against the plate member 77.
is pivoted clockwise against the force of springs 91, 92 (FIG. 2), so that plate member 77 reaches position 103 (FIG. 6) indicated by the dash-dotted line and then moves to position 104 indicated by the dash-dotted line. reach. Plate member 77 is at position 10
4, the levers 23, 24 (Fig. 1) are
The arm portions 33, 34 are stopped by engaging the stop portions 36, 37, and the lug portion 48 is in position 59, closing the switch 51 as described above (operating state). In this state, when the operator introduces the paper 54 and operates the keyboard 64 (FIG. 7), the motor 17 receives the command and rotates the platen 12 (FIG. 1) a predetermined number of steps, moving the paper 54 into the first Move it to the position indicated by the dashed dot line in the figure (the position indicated by the solid line in Fig. 6). In this position, the upper edge of the paper 54 is just beyond the print line. Here, the operator selects the lever 2 as described above.
3 and 24 (Figure 1) back to their original positions. During the return rotational movement of the lever, the action of springs 91, 92 (FIG. 2) causes plate member 77 to initially move to position 103 (sixth position).
) and then position 102 is reached. Immediately after plate member 77 leaves position 102 in FIG. toward the platen 12. In the position where plate member 77 engages shoulder 89, paper 54 is closely engaged with platen 12, allowing printing at the upper edge of the paper.

As is clear from the above description, the above-described paper introduction device 11 (FIG. 1) is capable of printing numbers near the top edge of the paper when the operator needs to print immediately on the top edge of the paper 54. This is particularly useful when making such checks. Depending on the different types of checks and other documents from bank to bank, the memory 63 (FIG. 7) and the central unit 62 contain different information specific to the top edge of the document, depending on the type of document. The motor 17 is rotated by a predetermined amount in order to position the part to the printing position.

The paper introduction device 11 (FIG. 1) described above is particularly useful in printing devices having a printing mechanism mounted on a movable carriage and located in close proximity to the platen. For example, printing mechanisms of this type are of the daisy wheel type type carrier with flexible pedals, as disclosed for example in JP-A-55-37394, or of the needle type.

In order to closely engage (i.e., seal) the top edge of the paper with the platen adjacent to the print line without the use of an upper pressure roller, it is conventionally mounted on a movable carriage of the print mechanism to bring the top edge of the paper into close contact with the platen adjacent to the print line. A rigid plate member or bar member occupying a portion has been used. Such a plate member or the like has an opening at a position corresponding to the printing mechanism to enable printing operations. However, such a board member has the disadvantage that a check, etc. can get caught on the edge of the opening of the board member or the edge of the member itself during the introduction of paper (checks or other documents) or during the movement of the carriage. . When this phenomenon occurs, even if the edges are sloped or properly shaped, paper jams will most likely occur.
However, as is apparent from FIG. 2, in the present invention, plate 77 protects the entire width of the platen in the operative position (FIG. 6), and in this operative position the lower edge of plate 77 is just above the print line. Located in
There is no relative movement between the plate and the paper during carriage movement, and the plate 77 at position 104 does not come into contact with the top edge of the paper 54 during paper introduction. Position 102 of positions 102-104 due to the cam surface of cover 101 being inclined with respect to the platen.
, the lower edge of the plate member 77 is located below the upper edge of the paper, and starting from this position 102 the plate member 77 can engage the upper edge of the check 54;
Paper can be positioned adjacent to the print platen.
Therefore, adhesion between the plate member and paper and paper jams do not occur.

[Brief explanation of drawings]

FIG. 1 is a partial side view of a paper introducing device of the present invention applied to, for example, an electronic typewriter. FIG. 2 is a partially sectional plan view showing details of a portion of the apparatus of FIG. 1; FIG. 3 is a partially detailed side view of FIG. 1. FIG. 4 is a partial plan view of FIG. 3. FIG. 5 is a side view of another detail of FIG. 1; 6 is a partially enlarged side view of the sheet introduction device of FIG. 1 showing successive operating positions; FIG. FIG. 7 is a block diagram of a control and operating unit of a typewriter to which the paper introduction device of FIG. 1 is applied. 11: paper introduction device, 12: platen, 13,
14: Roller, 22: Bar, 23, 24: Lever, 31, 32: Spring, 44: Operating lever, 7
7: Plate member.

Claims (1)

[Scope of Claims] 1. A platen 12 that holds paper; a lower guide member 13 that guides the paper toward the print line on the platen; and a lower guide member 13 that guides the paper beyond the print line and guides the paper toward the platen. Guide member 14 held close
an operable switch 51 for imparting a rotational motion to the platen to advance the paper so that the upper edge of the paper slightly exceeds the print line; and for separating at least a portion of the guide member from the platen. a drive element 23 of; and a coupling means 44 acting on said switch in response to movement of a portion of said guide member; said guide member comprising: a bar 22; a series of paper pressing rollers 14 rotatable and slidable at; two levers 23, 24 supporting said bar;
The two levers have a first position in which the pressure roller is in contact with the platen, and a second position in which the pressure roller is separated from the platen to allow the paper to be introduced therebetween. In the paper introduction device movable to a position, the contact position is arranged on the bar 22 parallel to the platen 12 and restrained against shoulders 88 and 89 on the two levers 23 and 24. a bar member 77 movable from the shoulder portion to a free position spaced apart from the shoulder portion; and torsion spring means 91, 92 for urging the bar member to the abutment position; a portion extending parallel to the platen and guiding the upper edge of the sheet to the pressing roller when the bar member is in the contact position and the lever is in the first position; and is disposed adjacent to the platen and cooperates with the bar member to maintain the bar member in the free position against the action of the torsion spring when the two levers are in the second position. Cam means 101
a lower edge of the bar member engages a sheet of paper in the free position when the two levers are returned from the second position to the first position, and the lower edge of the bar member engages the upper edge of the sheet of paper in the free position; A paper introduction device characterized in that the paper is pressed against a platen at a position slightly beyond the printing line, thereby allowing printing in an area immediately adjacent to the upper edge of the paper. 2. The apparatus of claim 1, wherein said bar member 77 extends substantially over the entire length of platen 12 and carries a shoulder at its end, and wherein said bar member 77 extends substantially over the entire length of platen 12 and carries a shoulder at its end. A device characterized in that it is provided with shoulders 88, 89 cooperating with corresponding shoulders of the device. 3. The device according to claim 1 or 2, wherein the drive element 23 drives the switch 51 via the coupling means when the two levers 23, 24 move to the second position. Featured device. 4. The apparatus according to claim 3, wherein a first position of the two levers presses the pressure roller 14 against the platen 12, and a second position in which the two levers abut against a fixed shoulder. A device characterized in that it comprises bistable spring means 31, 32 acting on said two levers 23, 24 to hold them in place. 5. The device according to claim 4, wherein the driving means 23
has one of the two levers 23, 24, and the coupling means 44 has a drive lever for driving the switch 51 when the two levers are in the second position. A device that does this. 6. Apparatus according to claim 5, characterized in that said switch 51 is arranged in an electric typewriter, and said paper is a check. 7. A platen 12 that defines a printing line and supports the paper; A lower guide member 13 that guides the paper toward the printing line; A bar member 77 having a guide portion that guides the upper part of the paper beyond the printing line; a support 22 for pivotally supporting a bar member; means for moving said support between an operative position and an inoperative position, said support 22 pivotably supporting said bar member; said means for retaining a member adjacent said platen and for retaining said bar member spaced from said platen when in said inactive position to permit paper to be introduced therebetween; and on said bar member; means for operating on the bar member 77 for causing the upper print line of the paper to be in close proximity to the uppermost edge of the paper; the means for operating on the bar member 77; first spring means 91, 92 for biasing the bar member 77 against the platen 12; constraining the bar member in a guiding position so that the guide portion is substantially parallel to the platen;
Shoulders 88, 8 on the support for positioning the support proximate the platen in the operative position of the support.
9; and cam means adjacent said platen and disposed in the path of said bar member for changing the slope of the guide portion of said bar member from a position parallel to said platen to a position coinciding with the top of the sheet. and wherein the bar member cooperates with the cam means against the spring means and is brought into position corresponding to the top of the sheet in response to movement of the support 22 from the activated position to the inactive position. A paper introduction device positioned and configured such that a lower edge of the bar member is engaged with an upper portion of the paper. 8. Device according to claim 7, characterized in that it is equipped with a printing unit having a daisy wheel type carrier. 9. Apparatus according to claim 7 or 8, wherein the support 22 carries the upper paper pressure roller 14 of the apparatus, and the support is adapted for moving the bar member 77 into the first and second positions. A device arranged within the contour of the bail on a pair of actuating levers 23,24. 10. Apparatus according to any one of claims 7 to 9, in which a bar member 77 is pivoted on the support 22, and the first spring means 91, 92 position to hold the bar member restrained in the operative position spaced apart from the platen 12 such that the sheet is held in close proximity to the platen. 11. The apparatus of claim 10, at least one shoulder 89 carried on the support 22;
and an opposite shoulder 83 coupled to bar member 77
said first spring means 90, 91 hold said opposite shoulder against said support in a first position of said support; When moving between the second position and the second position, the cam means 101 acts on the bar member against the force of the spring means to prevent interference between the bar member and the printing unit. Featured device. 12. Apparatus according to claim 11, characterized in that said cam means (101) comprises part of a cover that protects the printing unit. 13. Apparatus according to any of claims 7 to 12, acting on the support when the bar member is in the first position to move the bar member 77 away from the second position; When the bar member is in the second position, the bar member is moved to the first position.
said second spring means 30 for separating from the position of;
31 and said second spring means 30, 31
is the first position in the second position of the support part 22.
A device characterized in that it has spring means 91, 92. 14. The apparatus of claim 11, wherein the bar member 77 extends substantially the entire length of the platen 12 and has its ends defined by two opposing shoulders 8.
3, 84, characterized in that said levers 23, 24 are provided with shoulders 89 which can cooperate with corresponding opposite shoulders of said bar members. 15. The apparatus of claim 14, including a spring 9 in the form of a coiled spring on each end of said bar member 77.
1,92 are arranged, the ends of which act between said bar member and the levers 23,24.