JP2517655B2 - Ink sheet winding drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Utilization] The present invention relates to an ink sheet winding drive device, and in particular, an ink sheet is stored in an ink sheet cassette, and the ink sheet cassette is detachably attached to a printing device and driven. And an ink sheet winding drive device.

[Prior Art] FIG. 16 shows a conventional device of this type.

In the figure, reference numeral (1) is a printing device, (2) is an ink sheet cassette in which an ink sheet is wound around a winding shaft (3) and a winding shaft (4) and is stored. The sheet cassette (2) includes the ink sheet bobbin of the winding shaft (3) and the winding shaft (4), as shown by a chain line.
The printer is fitted and attached to the drive shaft (5) and the idle shaft (6) of the printer (1). This mounting is, for example, the drive and idle shaft (5) of the printing device (1), which is normally biased in the protruding direction.
Fit (6) by pushing in and attach.

[Problems to be Solved by the Invention] Since the conventional apparatus is configured as described above, in order to attach and detach the ink sheet cassette, the drive shaft and the idle shaft of the printing apparatus are pushed in and the ink sheet cassette is inserted. It is very difficult to operate because the space provided is widened and the ink sheet cassette is inserted into it.
Accidents may occur, such as damage to the ink sheet cassette, damage to nearby equipment, and injury. The conventional device has a problem of obtaining an ink sheet winding drive device that can be easily attached and detached without causing such an accident.

The present invention has been made in order to solve the above problems, and an ink sheet take-up device that can be easily attached and detached without damaging the ink sheet cassette or a nearby device and is easy to handle The purpose is to obtain a drive.

[Means for Solving the Problems] A first invention of an ink sheet take-up drive device according to the present invention is provided in a printing device, a case for accommodating an ink sheet cassette, a take-up shaft for the ink sheet cassette, and a cover. A pair of housings that are provided in the case so as to face the shaft ends of the winding shaft, respectively, and a pair of housings that penetrate the case and a housing that is on the winding shaft side are rotatably and slidably inserted in the axial direction. A drive shaft that is rotated by the transmission of driving force,
A floating shaft that is rotatably and axially slidably inserted in the housing of the winding shaft, and is fixed to the ends of the drive shaft and the floating shaft, and the shaft ends of the winding shaft and the winding shaft. A pair of bushes that are relatively non-rotatably engaged with the portion, and a pair of bushes that bias the drive shaft and the floating shaft in the direction in which these bushes engage with the shaft end portions of the winding shaft and the wound shaft, respectively. With a spring,
The drive shaft and the idle shaft are rotatably pierced respectively, and by rotating while contacting the housing, the bush opposes each spring in the direction of separating from the shaft ends of the winding shaft and the winding shaft. The cam includes a pair of manually rotatable pivot members that constitute a cam device that moves the drive shaft and the idle shaft, and a coupling member that couples these pivot members and interlocks the respective pivots. The cam surface of the device holds an inclined surface inclined with respect to the rotation axis of the drive shaft and the idle shaft so as to move the drive shaft and the idle shaft in the axial direction, and the drive shaft and the idle shaft at the moving end in the axial direction. Thus, it has a holding surface formed perpendicular to the rotation shaft of the drive shaft and the idle shaft.

In addition to the above configuration, the second invention is provided with an interlocking mechanism that interlocks the opening / closing operation of the lid for opening / closing the opening of the case with the rotating operation of the rotating member.

[Operation] Since the present invention is configured as described above, the first
In the invention of claim 1, by manually rotating one of the rotating members, the other rotating member also rotates in the same state,
Due to the cam action based on this rotation, both rotary members move outward in the axial direction. Therefore, the drive shaft also moves outward due to the movement of the rotating member in the axial direction, so that the bush fixedly attached to the inner end of the drive shaft also separates from the ink sheet bobbin at the attachment / detachment portion and faces outward. To move. As a result, the ink sheet cassette can be pulled out straight as it is.

Further, the ink sheet cassette is mounted by reversing the above operation and operating each part.

Further, in the second aspect, the opening / closing operation of the lid is transmitted to the rotating member by the interlocking mechanism, and the drive shaft and the idle shaft are automatically reciprocated in the axial direction as the lid is opened / closed.

[Embodiment] The present invention will be described below with reference to the drawings showing an embodiment thereof. In the figure, reference numerals (2), (3) and (4) are the same as or equivalent to those shown by the same reference numerals in the conventional apparatus.

In FIG. 1, reference numeral (11) is a printing device, (12) is a lid of the printing device (11), and (13) is an opening / closing shaft that is fixed to the lid (12) and supports opening and closing of the lid (12). , (14) are manual operation levers attached to a rotating member described later.

In the figure, the ink sheet cassette (2) is inserted and mounted in the mounting portion of the printing device (11) as shown by the chain line.

Next, of the present invention, the second to second embodiments of the first invention will be described.
The first invention will be described with reference to FIG.

2 to 4, reference numeral (15) is an ink sheet winding drive unit, and (16) is an ink sheet winding drive unit (1).
The idle gear that transmits power from 5), and (17) is the driven gear that meshes with the idle gear (16).

On the other hand, the case (11a) of the printer (11) is provided with housings (18) and (19) corresponding to the winding shaft (3) and the winding shaft (4) of the ink sheet cassette (2). Has been. This housing (18) (19) has a drive shaft (20)
Also, a floating shaft (21) is rotatably provided so as to penetrate therethrough. Rotating members (22) and (23) are rotatably fitted to the drive shaft (20) and the idle shaft (21) in contact with the outsides of the housings (18) and (19), respectively. Bushings (24) and (25) are fixedly provided on the inner end portions. A driven gear (17) is non-rotatably attached to the drive shaft (20) outside the rotating member (22) of the drive shaft (20). Next, reference numeral (27) is a drive shaft (20) and a floating shaft (2
(1) is a retaining pin, for example, a retaining pin from the rotating members (22) (23) and the driven gear (17), and (28) is a rotating member (22).
Both ends are rotatably pin-coupled to a predetermined position in the peripheral portion of (23), and the connecting bar serves as a connecting member for rotating both rotating members (22, 23) in the same state. . Next, (29) is a spring that constantly urges the drive shaft (20) and the idle shaft (21), that is, the bushes (24) and (25) toward the ink sheet cassette (2) side, and (30) is the spring (29). ) To transmit the pressing force to the bushes (24) (25), the holder is rotatably fitted to the drive shaft (20) and the idle shaft (21).

Further, (31) and (32) are ink sheet cassettes (2).
The ink sheet bobbin is fixed to the take-up shaft (3) and the take-up shaft (4).

Among the parts arranged as described above, the ink sheet bobbins (31) (32) and the bushes (24) (25) can be engaged with and disengaged from each other. Is an attachment / detachment part (33
a) and (33b) are provided, for example, by the configuration shown in FIG. That is, the ink sheet bobbin (3
1) (32) side attachment / detachment portion (33a) is formed with a plurality of sets of groove portions (34) formed on the circumference and facing each other. The bushing (24) (25) side attachment / detachment portion is formed. Groove (34) on (33b)
Is provided with a pair of convex portions (35).

Next, the housing (18) (19) and the rotating member (22) (2
A cam device (36) is formed between the cam device and (3). That is, the housing (18) (19) has a cam surface (36a) formed, for example, as shown in FIGS. 6 and 7, and the cam surface (36a) is formed as shown in FIG. Has been done. Further, the rotating members (22) and (23) are provided with a cam surface (36b) as shown in FIGS. 8 and 9, and the cam surface (36b) is as shown in FIG. Has been formed.

Therefore, the housing (18) (19) and the rotating member (22)
When (23) is combined as described above, the cam surfaces (36a) (36b) thereof are combined as shown in FIG. 10, and as a result, the rotating members (22) (23) are rotated, that is, the arrow A When moved in the direction of, the rotating members (22, 23) move in the axial direction by the distance S. Further, the cam surface of the cam device of this embodiment is inclined with respect to the rotation axes of the drive shaft (20) and the floating shaft (21) so as to move the drive shaft (20) and the floating shaft (21) in the axial direction. The inclined surfaces (36a) (36b) and the drive shaft (20) and the idle shaft (21) move in the axial direction, that is, the bush (24).
The drive shaft (2) holds the (25) at the position where it is connected to the ink sheet bobbins (31) (32) and the position where it is completely separated.
0) and holding surfaces (18a) (18b) (22a) (22b) formed perpendicular to the rotation axis of the floating shaft (21).

The first invention is constructed as described above, but the embodiment of the second invention is constructed as shown in FIGS. 11 to 15. However, except for the rotating member (23) on the side of the floating shaft (21), all the configurations of the embodiment in the first invention are
Embodiments of the invention are provided.

In the figure, reference numeral (41) is a rotating member which replaces the rotating member (23) and has the same structure as the rotating member (23) and has a tooth portion on a part of its outer periphery. A member-side toothless gear (42) is attached. (43) is a toothless gear, and as shown in FIG. 12, has a tooth (44) meshing with the rotating member side toothless gear (42) on a part of its outer circumference, and also has another circle. A groove portion (45) and a concave portion (46) are provided in the peripheral portion.

A crank plate (47) is fixed to an end of the opening / closing shaft (13), and a base end of a crank bar (48) is rotatably attached to a part of the crank plate (48) by a pin coupling. At the tip of (48), the groove (45) of the toothless gear (43)
A roller (49) engaging with is rotatably attached, and its side (50) is in a state where the lid (12) is fully opened, as shown in FIG. The roller (49) is configured to come into contact with the shaft (43a) of the roller and to be separated from the groove (45).

Since the present invention is configured as described above,
In the invention, when the operating lever (14) is manually rotated, the rotating members (22) (23) are moved through the connecting bar (28).
Rotate in the same state at the same time, and the cam device (3
6) is relatively displaced, and therefore the drive shaft (20) and the idle shaft (21) move against the pressing force of the spring (29) as shown by the arrow in FIG. As a result, the bushes (24) (25) are also pulled out, and the bushes (24) (25) are detached from the groove portions (34) of the attachment / detachment portions (33a) of the ink sheet bobbins (31) (32). The convex portion (35) is pulled out to separate the ink sheet bobbins (31) (32) from the bushes (24) (25) and the bushes (24) (25) are retracted to obtain the state shown in FIG. In this state, the ink sheet cassette (2) can be freely pulled out straight.

Further, in order to change the state of FIG. 4 to the state of FIG. 3, the above procedure may be followed in reverse.

Next, in the second aspect of the invention, when the lid (12) is opened, the crank plate (47) is rotated by the rotation of the opening / closing shaft (13), and the crank bar (48) is moved in the direction of the arrow shown in FIG. Move in the direction. In that case, since the spring (51) constantly pulls up the crank bar (48), the roller (49) at the tip of the crank bar (48) fits into the groove portion (45) of the tooth-chipped gear (43), and thus the missing part is formed. Rotate the gear (43) counterclockwise. As a result, the rotating member (41) is rotated clockwise and
The rotating member (22) is also rotated by the connecting bar (28).

After this state, the same operation as that of the first invention is performed.

However, when the lid (12) is fully opened, the teeth (44) of the tooth-chipped gear (43) and the rotation member-side tooth-chipped gear (42) of the rotation member (41) are disengaged from each other, and the crank bar is disengaged. Since the side piece (50) of (48) contacts the shaft (43a) of the toothless gear (43),
The roller (49) at the tip of the crank bar (48) has a groove (45).
Get out of. As a result, the drive shaft (20) and the idle shaft (21) can be freely moved in and out at any time by manually operating the operation lever (14).

[Effects of the Invention] As described above, according to the first aspect of the present invention, the housing including the cam device and the rotating member are provided, and the movement of the outer end surface of the rotating member is controlled by the drive shaft and the idle shaft. And tell
A bush that is configured to interlock the movement of the drive shaft and the floating shaft in the axial direction and that is fixed to the inner ends of the drive shaft and the floating shaft is attached to and detached from the shaft ends of the winding shaft and the wound shaft. Since it is possible to attach and detach the ink sheet cassette, the ink sheet cassette can be directly pulled out without damaging the ink sheet cassette or a nearby device, and the cam surface of the cam device can be removed. Since a holding surface for holding the drive shaft and the idle shaft is formed at a position where the bush is separated from the take-up shaft and the take-up shaft, the drive shaft and the idle shaft move due to vibration or the like. Can be prevented and the operability and stability can be improved.

Further, according to the second aspect of the invention, since the rotating operation of the rotating member is interlocked with the opening / closing operation of the lid, there is an effect that an ink sheet take-up drive device capable of further improving operability can be obtained. ing.

[Brief description of drawings]

FIG. 1 is a perspective view of a printing apparatus showing a procedure for mounting an ink sheet cassette according to an embodiment of the present invention, FIG. 2 is a side view of the configuration of each part in the first invention of FIG. 1, and FIG. FIG. 4 is a plan sectional view of the ink sheet cassette in the mounted state.
FIG. 5 is a plan sectional view of the removable state of FIG. 3;
2 is an exploded perspective view of the attaching / detaching portion of FIG. 2, FIG. 6 is a sectional view of the housing of FIG. 2, FIG. 7 is a cam line diagram of FIG. 6, and FIG. 8 is a rotation member of FIG. FIG. 9 is a sectional view, FIG. 9 is a cam diagram of FIG. 8, FIG. 10 is a cam operation diagram according to the cam diagrams of FIGS. 7 and 9, and FIG. 11 is a side view of each part in the second invention of FIG. Fig. 12, Fig. 12 is a plan view of the toothless gear of Fig. 11, and Fig. 13 is Fig.
14 is an explanatory view of the working relationship between the toothless gear and the crank bar in the figure,
11 is a plan sectional view of the ink sheet cassette shown in FIG. 11 in a mounted state, FIG. 15 is a plan sectional view of the removable state shown in FIG. 14, and FIG. 16 is a printer showing a conventional ink sheet cassette mounting procedure. It is a perspective view. (2) …… Ink sheet cassette, (11) …… Printer, (11a) …… Case, (12) …… Lid, (13) …… Opening / closing shaft, (17) …… Driven gear, (18) (19) …… Housing, (20) …… Drive shaft, (21) …… Floating shaft, (22) (2
3) (41) …… Rotating member, (24) (25) …… Bush,
(31) (32) …… Ink sheet bobbins, (33a) (33b)
...... Detachable part, (36) …… Cam device, (42) …… Rotating member side toothless gear, (43) …… Toothless gear, (43a) …… Shaft, (4
5) Groove, (47) Crank plate, (48) Crank bar, (49) Roller, (50) Side. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (2)

(57) [Claims] 1. A case, which is provided in a printing apparatus, for accommodating an ink sheet cassette, and is provided in the case, so that shaft ends of a winding shaft and a wound shaft of the ink sheet cassette face each other. A pair of housings penetrating the case, a drive shaft which is rotatably and axially slidably inserted in the housing on the side of the winding shaft, and which rotates by receiving the driving force of the driving device, and the shaft to be wound. Side shaft housings, which are respectively rotatably and slidably inserted in the axial direction, fixed to the end portions of the drive shaft and the idle shaft, and the shaft end portions of the winding shaft and the wound shaft. A pair of bushes that are relatively non-rotatably engaged with each other, and bias the drive shaft and the idle shaft in a direction in which these bushes engage the shaft ends of the winding shaft and the wound shaft, respectively. A pair of springs and the drive And the floating shaft is rotatably pierced through, and is rotated in contact with the housing so that the bush is separated from shaft ends of the winding shaft and the wound shaft. A pair of manually rotatable pivot members that constitute a cam device that moves the drive shaft and the idle shaft against each spring, and a coupling that couples these pivot members and interlocks their respective pivots. A cam surface of the cam device, the cam surface of the cam device being inclined with respect to the rotation axis of the drive shaft and the idle shaft so as to move the drive shaft and the idle shaft in the axial direction; And a holding surface formed perpendicularly to the rotation axis of the drive shaft and the idle shaft so as to hold the idle shaft at the moving end in the axial direction. . 2. The ink sheet take-up drive device according to claim 1, further comprising an interlocking mechanism for interlocking the opening / closing operation of the lid for opening / closing the opening of the case with the rotating operation of the rotating member.