JPH0523341Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention is a paper feeding device that feeds printing paper having engagement holes formed on both sides at required pitches to a printing position of a printing device. Regarding.

(b) Prior Art In the paper feeding device disclosed in Japanese Patent Application Laid-Open No. 57-117981, the fixed shaft is fixed to the main body frame of the printing device and has a through hole through which the fixed shaft is inserted. a pair of clamping pieces arranged to sandwich the same from both sides, a support piece having one end attached to the tip of one clamping piece and the other end extending through the other clamping piece, and the other end of the support piece. A fixing device consisting of a fixing lever having a cam that slides into contact with the other clamping piece was attached to the clamping piece. When the fixed lever is swung in a predetermined direction, the pressing force applied by the cam to one of the clamping pieces is relaxed, and the clamping state of the fixed shaft between the pair of clamping pieces is released. This allows the mounting position of the fixed shaft and paper feeding device to be changed.
Furthermore, when the fixed lever is swung in the opposite direction, the cam is brought into sliding contact with the other clamping piece to narrow the gap between the tips of the pair of clamping pieces, thereby applying a pressing force, The fixed shaft was held between the pieces. This allows the paper feeding device to be fixed to the fixed shaft. In this way, the paper feeding device is fixed in a repositionable manner to a required position on the fixed shaft depending on the width of the printing paper.

(c) Problems to be solved by the invention However, the fixing device for the paper feeding device described above is
Since it requires a pair of clamping pieces, a supporting piece, a fixing lever, and many other parts, it has problems of poor assembly workability and high cost.

(d) Means for solving the problems In view of the above-mentioned conventional drawbacks, the purpose of the present invention is to
With a small number of parts, it is possible to change the position of the support frame to match the width of the printing paper, while feeding the printing paper in a way that restricts the movement of the support frame and prevents the printing position from shifting during normal times. It is an object of the present invention to provide a paper feeding device that can maintain a closed state of a lid body and feed printing paper while reliably engaging a pin with an engagement hole of the printing paper.

For this reason, the present invention has a support frame that is slidably supported by a fixed shaft fixed to the main body frame of the printing device, and a number of pins that engage with engagement holes formed in the printing paper and are arranged on the outer circumferential surface. a transport means that is protrudingly provided at intervals and is capable of moving the printing paper as the printing paper is rotated with the rotation of a rotary shaft extending substantially parallel to the fixed shaft; and an engaged state of the pin and the engagement hole facing the transport means. a lid body supported by the support frame so as to be rotatable between a closed position in which the printing paper is retained and an open position in which the printing paper can be removed from the transfer means; a fixed lever that is independently rotatably attached and capable of holding the fixed shaft between it and the support frame; When the lid body is deflected and rotated to a closed position, the lid body is latched at a position that can maintain the closed state of the lid body, and the lid body is rotated to each of an open position and a closed position. This paper feeding device includes a spring member that rotates and biases the fixed lever so that the fixed lever is held in a sandwiched state with respect to the fixed shaft when the fixed lever is held in place.

(e) Effect of the invention According to the invention, since the state of engagement between the pin and the engagement hole is maintained by the lid which is held in the closed position by a spring member, the pin can be reliably inserted into the engagement hole of the printing paper. It can be engaged with and fed. Moreover, when removing the printing paper from the transfer means, it can be easily done by pushing the lid against the elastic force of the spring member. Further, by rotating the fixed lever against the elastic force of the spring member, the support frame can be moved to any position on the fixed shaft, and the distance between the support frames can be made to match the width of the printing paper. . Additionally, when you release your hand from the fixed lever, the fixed lever uses the elastic force of the spring member to clamp the fixed shaft between itself and the support frame, firmly fixing the support frame at the desired position depending on the width of the printing paper. I can do it. As a result, the single spring member firmly fixes the support frame at the required position on the fixed shaft according to the width of the printing paper, and also maintains the engagement state of the pin with the engagement hole to ensure that the printing paper is fed securely. It is possible to send

(f) Effect of the invention As described above, the present invention makes it possible to change the position of the support frame to match the width of the printing paper with a small number of parts, and at the same time prevents the printing position from shifting by restricting the movement of the support frame. To provide a paper feeding device capable of feeding printing paper in such a manner that the printing paper is fed while maintaining a closed state of a lid body and surely engaging a pin with an engagement hole of the printing paper. can do.

(g) Examples An embodiment of the present invention will be described below.

FIG. 1 shows a dot impact printing device equipped with the paper feeding device of the present invention, in which a flat platen 1 is installed between the left and right body frames (not shown) of the printing device. ing. Further, a carriage guide shaft 3 is mounted between the main body frames in parallel with the platen 1, and a carriage 5 is supported on the carriage guide shaft 3 so as to be slidable along the platen 1. and the carriage 5
A dot impact type printing head 7 is placed on the printing head 7, and as the carriage 5 moves, the printing head 7 is moved.
moves back and forth along the platen 1.

Between the main body frame below the platen 1 are two rotating shafts 9 and 11 and one fixed shaft 1.
3 is suspended horizontally. Both rotating shafts 9 and 11 are drivingly connected to a paper supply motor (not shown), and as the paper supply motor rotates, these rotating shafts 9 and 1
1 rotates synchronously in the same arbitrary direction. A pair of left and right paper feeding devices 15 (only one is shown) are attached to the rotating shafts 9, 11 and the fixed shaft 13 so that their positions can be changed according to the width of the printing paper, and the paper feeding devices 15 are not mounted. The printed printing paper 17 is fed to a printing device between the platen 1 and the printing head 7. Further, above the platen 1, a print paper pull-out mechanism consisting of a drive roller 19 and a pressure roller 21 is installed.

Figure 2 shows the planar state of the paper feeding device, Figure 3 shows the left side, and Figure 4 shows the cross section taken along line A-A in Figure 2.
In FIG. 5, which shows an enlarged cross section taken along line B-B in FIG. The frames 31a and 31b are assembled and fixed by fixing screws 32. Further, a guide frame 37 is integrally formed at the front end of one of the support frames 31a, and a shaft support hole 39 is formed in the guide frame 37. and the shaft support hole 3
A toothed pulley 41 is rotatably supported by the toothed pulley 41, and a large number of pins 41a are formed on the outer peripheral surface of the toothed pulley 41 to engage with engagement holes 17a formed at a required pitch on both sides of the printing paper 17. has been done. A through hole 41b is formed in the center of the toothed pulley 41, and the rotating shaft 11 is slidably inserted into the through hole 41b. Further, the toothed pulley 41 rotates as the rotation shaft 11 is driven by the key formed on the toothed pulley 41 and the key groove formed on the rotation shaft 11, and feeds the printing paper 17 to the printing position. . Note that the guide frame 37 has a notch 37.
A is formed in the rotational direction of the toothed pulley 41, and the notch 37a allows the pin 41a to rotate. As a result, the printing paper 17 fed along the inner circumferential surface of the guide frame 37 is fed through the engagement hole 17a.
The engaged state of the pin 41a is maintained.

A drive toothed pulley 43 is rotatably supported in the shaft support hole 33 formed in the support frames 31a, 31b. In addition, one support frame 31
A belt guide 45 is integrally formed in a.
The rotating shaft 9 is inserted into the through hole 43a having a key formed in the center of the driving toothed pulley 43, and the rotating shaft 9 is inserted into the key formed in the driving toothed pulley 43 and the key formed in the rotating shaft 9. Due to the groove, the drive toothed pulley 43 rotates in accordance with the rotation of the rotating shaft 9. The drive toothed pulley 43 and the belt guide 45
A toothed belt 47 constituting the transfer means of the present invention is installed between the two, and the outer peripheral surface of the toothed belt 47 has a large number of pins 47a that engage with the engagement holes 17a.
are provided protrudingly at each required pitch.

In FIG. 5, the one support frame 31a
An inverted L-shaped holder 49 is integrally formed on the left side surface of the holder 49, and a support hole 49 is formed at the lower end of the holder 49. Further, a recess 51 that opens toward the holder is formed on the left side surface of the support frame 31a facing the lower end of the holder 49, and a recess 51 that opens toward the holder extends downward from the opening edge of the recess 51 in a direction away from the holder 49. An inclined cam surface 52 is formed. A fixed lever 55 is rotatably supported in the support hole 49a and the recess 51 independently of the lid 61. This fixed lever 55 has one shaft portion engaged with the support hole 49a, and then the other shaft portion is connected to the cam surface 55.
It is attached to one of the support frames 31a by engaging the recess 51 while sliding it along 2. At this time, the holder 49 is elastically deformed and allows the fixing lever to be attached. The fixed lever 55 has a substantially L-shaped side surface, and the through hole 35
It has a clamping piece 55a that presses the outer circumferential surface of the fixed shaft 13 that is inserted into and an operating lever 55b. Furthermore, a friction body 57 having a high friction coefficient is attached to the holding piece 55a at a location corresponding to the fixed shaft 13.

Further, in FIG. 5, a pair of front and rear support portions 59a, 59 that are open along the upper side are integrally formed at intervals on the left side of the upper surface of one of the support frames 31a, and the support portions 59a, 59b are provided with lids. A shaft portion 61d of 61 is rotatably supported. A long hole 61a is bored in the front-rear direction of the central part of the lid 61, and a pin 47a is positioned in the long hole 61a when the lid 61 is in the closed position facing the toothed belt 47. , the toothed belt 47 is allowed to move. Further, a plurality of hanging walls 61c extending in the moving direction of the toothed belt 47 are integrally formed on the back surface of the lid body 61, and the hanging walls 61c are formed on the back side of the toothed belt 47.
The printing paper 17 placed above is pressed. As a result, the lid 61 is attached to the pin 47a of the toothed belt 47.
The state of engagement with the engagement hole 17a of the printing paper 17 is maintained.

Furthermore, in FIG. 5, a projecting piece 61b is integrally formed at the center of the left side of the lid body 61.
A tension spring 63 is attached to b and the clamping piece 55a. Then, the lid body 61 is rotated counterclockwise from the closed position shown in FIG.
The attachment position to the lid body 61 of No. 3 is the shaft portion 61 of the lid body 61.
When the axis line at point d is crossed, the tension spring 63 uses its elastic force to rotate and urge the lid body 61 in the counterclockwise direction and hold it in the open state. Moreover, the lid body 6
1 is rotated clockwise from the state shown in FIG. The force urges the lid body 61 to rotate clockwise and holds it in the closed state shown in FIG. Further, the shaft portion 61d of the lid body 61 is held within the support portions 59a, 59b of the support frame 31a by the elastic force of the tension spring 63. The fixed lever 55 is urged to rotate clockwise in FIG. 13 at any position.

Next, the operation of the paper feeding device constructed as described above will be explained with reference to FIGS. 5 and 6.

When using this paper feeding device 15, first move the paper feeding device 15 in the axial direction of the rotating shafts 9 and 11 and the fixed shaft 13 to a position corresponding to the printing paper width of the printing paper 17 to be used. After that, the paper feeding device 15 is fixed at this position. That is, when the fixed lever 55 is rotated counterclockwise as shown in FIG. 3 against the elastic force of the tension spring 63, the clamping piece 55a that was holding the fixed shaft 13 is released from pressing against the fixed shaft 13. be done. As a result, the paper feeding device 15
becomes slidable in the axial direction of the rotating shafts 9, 11 and the fixed shaft 13. Then, with the fixed lever 55 rotated as described above, the paper feeding device 15 is slid to a required position according to the paper width of the printing paper 17, and then the fixed lever 55 is moved by the tensile force of the tension spring 63.
When rotated in the clockwise direction shown in FIG. 3, the clamping piece 55a is pressed against the fixed shaft 13 by the elastic force of the tension spring 63. At this time, the holding piece 55a presses the fixed shaft 13 via the friction body 57, so that the paper feeding device 15 is firmly fixed and held at a required position.

Next, the lid 61 resists the elastic force of the tension spring 63.
When the cover 61 is rotated counterclockwise in FIG. 6, the elastic force of the tension spring 63 holds the cover 61 in the open state. At this time, the lid body 61 and the fixed lever 55 share the tension spring 63;
The fixed lever 55 is rotatably supported independently with respect to the lid 61, and the tension spring 63 is attached to the fixed lever 5 even when the lid 61 is in the open position or the closed position.
5 into pressure contact with the fixed shaft 13, the elastic force of the tension spring 63 prevents the clamping piece 55a of the fixed lever 55 from being in pressure contact with the fixed shaft 13 even when the lid 61 is in the open state. Keep paper feeding device 15
movement in the width direction of the printing paper 17 is restricted. In this state, the engagement hole 17a and pin 4
The front end side of the printing paper 17 is placed on the outer circumferential surface of the toothed belt 47 so that the front end side of the printing paper 17 is engaged with the toothed belt 1a. In this state, when the lid 61 is rotated clockwise in FIG. 6 against the elastic force of the tension spring 63, the lid 61 is held in its closed state by the elastic force of the tension spring 63. At this time, since the pin 47a engaged with the engagement hole 17a is located in the elongated hole 61a and the hanging wall 61c is located close to the top surface of the printing paper 17, the printing paper 17 is connected to the outer peripheral surface of the toothed belt 47. It is held between the lid body 61 and the lid body 61 .

By the above operation, the printing paper 1 is transferred to the paper feeding device 15.
When the paper supply motor is rotated after the paper feed motor 7 is installed, the rotating shafts 9 and 11 are synchronously rotated in the same predetermined direction, thereby rotationally driving the toothed pulley 41 and the drive toothed pulley 43. As a result, the drive toothed pulley 43
The toothed belt 47 attached to the toothed belt 47 moves in the direction of the solid arrow in FIG. Further, as the toothed pulley 41 rotates, the printing paper 17 is fed to the printing position along the inner peripheral surface of the guide frame 37.

If the paper supply motor is driven to rotate in the opposite direction, the toothed pulley 41 and the toothed belt 47 will rotate in the opposite direction to the above operation, and the printing paper 17 can be returned.

Therefore, in this embodiment, the lid body 61 and the fixing lever 55 are
The lid body 61 can be maintained in the open or closed state by the elastic force of a single tension spring 63 mounted between the lid body 61 and the lid body 61. Thereby, when the lid 61 is in the closed state, the pin 47a can be reliably engaged with the engagement hole of the printing paper fed by the lid 61, and the printing paper can be fed. Furthermore, although the tension spring 63 is commonly used as a member for holding the lid body 61 in the open and closed states and as a member for rotationally biasing the fixed lever 55, the fixed lever 55 is independent from the lid body 61. Since it is rotatably supported, even when the lid 61 is rotated between the open state and the closed state, the The press-contact state of the fixed lever 55 can be maintained, and especially when the cover body 61 is rotated to the open state in order to mount the printing paper 17 on the paper feeding device 15, the paper feeding device 1
This makes it possible to easily perform the mounting operation of the printing paper 17 by preventing positional deviations such as narrowing or widening of the mutual spacing between the paper sheets 17. As a result, if the distance between the paper feeding devices 15 increases, the printing paper 17 will be torn, and if the distance becomes narrow, wrinkles will occur in the printing paper 17, making it impossible to feed the printing paper 17. It is possible to prevent this from happening.

In this embodiment, the transfer means is provided with a large number of pins 47a on the outer periphery.
However, the transfer means of the present invention is constituted by a toothed pulley having a number of pins protruding from the outer periphery to engage with engagement holes formed on both sides of the printing paper. However, it is also possible to feed the printing paper as the toothed pulley rotates.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a printing device equipped with the paper feeding device of this invention, FIG. 2 is a plan view showing the planar state of the paper feeding device, FIG. 3 is a side view showing the left side, and FIG. The figures are a cross-sectional view taken along the line A--A in FIG. 2, FIG. 5 is an enlarged cross-sectional view taken along the line B--B in FIG. 3, and FIG. 6 is an explanatory view of the operation. In the figure, 9 and 11 are rotating shafts, 13 is a fixed shaft, 17 is a printing paper, 17a is an engagement hole, 31a, 31b are support frames, 47 is a toothed belt constituting a transfer means, 47a is a pin, and 55 is a fixed The lever 61 is a lid, and 63 is a tension spring as a spring member.

Claims (1)

[Claims for Utility Model Registration] A support frame that is movably supported in the axial direction by a fixed shaft fixed to the main body frame of the printing device, and a number of pins that engage with engagement holes formed in the printing paper. a transfer means that protrudes from the outer periphery at a predetermined interval and is capable of moving the printing paper with the rotation of a rotating shaft extending substantially parallel to the fixed shaft; and the pin and the engagement hole facing the transfer means. a lid body supported by the support frame so as to be rotatable between a closed position in which the paper is kept in an engaged state and an open position in which the printing paper can be removed from the transfer means; a fixed lever that is rotatably attached to the lid body and capable of holding the fixed shaft between it and the support frame; When the lid body is deviated from the center of movement and is rotated to the closed position, the lid body is latched at a location that can maintain the closed state, and the lid body is in each of the open position and the closed position. A paper feeding device comprising: a spring member that biases the fixed lever to rotate so as to maintain the clamped state of the fixed lever with respect to the fixed shaft when the fixed lever is rotated.