JPH0621845Y2 - Cassette printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cassette type printer, and more specifically, a cassette type printer in which a cassette having a printing paper roll is detachably attached to a cassette attachment portion of a printer body. And a holding means for holding the release printing paper.

(Prior art and its problem) Conventionally, as a means for holding a label peeled off from a label roll in a printer or the like, Japanese Utility Model Publication No. 53-39197 and Japanese Utility Model Publication No. 50-60000 are known. In Japanese Utility Model Publication No. 53-39197, a label holding roller is installed in parallel at the tip of the peeling member,
It is disclosed that the label peeled from the mount is held in a constant state by the peeling member.
In the publication, a roller is disposed below the peeling member, and a roller holder for holding the roller that determines the folding direction of the mount is movably provided by urging the roller holder in a direction away from the label peeling member. Is separated from the peeling member as needed to improve the mountability of the mount.

However, in any of the above-mentioned conventional techniques, the holding roller is always disposed around the peeling member, and even in the latter publication in which the holding roller is movable, the holding roller is not completely removed from the periphery of the peeling member. The loadability could not be improved significantly.

Particularly, it is important for practical use of the printer to facilitate loading of a printing paper roll such as a label mount into a miniaturized cassette such as a cassette type printer.

In view of the above conventional problems, the present invention has an object to provide a cassette-type printer having a holding roller, which enhances the loading property of the printing paper roll into the cassette and which is of great practical benefit. .

(Means for Solving the Problems) According to the present invention, a printer body is provided with a cassette mounting portion and a print head adjacent to the cassette mounting portion, and a cassette is provided with a printing paper roll,
In a cassette type printer including a platen roller and a peeling member, the cassette is detachably mounted on the cassette mounting portion of the printer body, and the print issuing unit is constituted by the print head, the platen roller and the peeling member. A print paper holding roller is rotatably attached near the print issuing unit, and an engaging portion for moving the holding roller to a predetermined position is provided. At the same time, the operating portion and the engaging portion cooperate with each other so that the holding roller faces the peeling member.
A second position in which the holding roller is moved away from the peeling member by moving the holding roller to the position and releasing the engaging portion as the cassette is released.
It is characterized by moving to a position.

(Operation) According to the present invention, when the cassette is mounted in the cassette mounting portion of the printer body, the holding roller is arranged so as to face the peeling member (first position), and the printing paper issued from the print issuing unit. Is held in a predetermined state to prevent it from being rolled up, and when the cassette is removed from the mounting portion, since there is no holding roller on the cassette side, the loadability of the printing paper roll is improved.

Further, since the holding roller is arranged so as to be separated from the peeling member (second position) when the cassette is detached, the cassette can be removed without disturbing the holding roller and the subsequent mounting operation can be performed.

(Embodiment) Referring to the drawings, an embodiment of the present invention will be described. FIG. 1 shows a printer body A and a cassette B of the present invention.

FIG. 1 (1) shows a plan view of the vicinity of the cassette mounting portion a of the printer main body A, in which the cassette B is mounted from the direction of the arrow in the drawing, 1 is a substrate, and 2 is a main body cover. In the cassette mounting portion a, two holding plates 3 and 3'are arranged in parallel on the substrate 1 at a predetermined interval and a guide projection 4 is formed.
Further, the guide groove 5 is formed in parallel with the holding plate 3, and all of these members 3, 3 ', 4, 5 have a longitudinal shape extending in the cassette mounting direction.

Further, in the mounting portion a, stoppers 6 and 6 made of leaf springs are provided at the rear end position of the cassette B to be mounted, and cassette locking claws 7 are projected upward at the front end portion.

A motor M is installed near the one side of the cassette mounting portion a and on the left side in the drawing, and a gear 9 is integrally attached to a timing pulley 8 which is transmitted to the timing belt by the motor M, and the gear 9 is rotatably arranged horizontally. Rotational power is transmitted to the winding shaft 31 and the platen roller 32 of the cassette B, which will be described later, via the gear 9.

Further, in the vicinity of the timing pulley 8, the detecting elements 10, 10 for the label position detector are arranged. A head fixing plate 11 is attached at a position adjacent to the cassette mounting portion a, specifically, in the vicinity of the holding plate 3, and a thermal head (printing head) 12 is arranged on the fixing plate 11.

The head fixing plate 11 has a side surface shape in which a part of parallel upper and lower surfaces are continuously provided by a vertical surface, the lower surface thereof is fixedly mounted on the substrate 1, and one end of the head fixing plate 11 is fixed to the substrate. A support portion 14 'of a head support plate 14 is swingably supported on a support shaft 13, and the thermal head 12 is attached to the head support plate 14 (Figs. 2 and 3).

In FIGS. 2 and 3, reference numeral 15 is a spring for pressing the central portion in the width direction of the thermal head 12 to urge it to a platen roller 32 provided in the cassette B described later with a predetermined pressure, and 16 is an urging force of the spring. Is a screw to adjust.

As shown in FIGS. 1 and 2, the head fixing plate 11 has a shaft 17 penetrating the upper and lower surfaces attached to the outer tip thereof, and a roller support plate 18 rotatably attached to the shaft 17.

The roller support plate 18 is a bearing in which the upper and lower ends of the vertical coupling surface 18a are bent in parallel to the left side in the figure to form a U shape, and bearing surfaces 18b and 18c of the roller shaft 19 described later are formed on the upper and lower surfaces. Section 18f
The upper and lower end portions of the vertical connecting surface 18e are bent in parallel to the bearing surfaces 18b and 18c in the opposite direction to form an inverted U-shape, and the bearing surfaces 18g and 18h of the shaft 17 are formed. The surface 18h is extended to provide an engaging portion 21 which will be described later, and an engaging member 18d in which a cutter 18i is formed at one end of the vertical connecting surface 18e.

The roller support plate 18 has both connecting surfaces 18a and 18e facing each other and is fixed by welding to be integrated, and its engaging member 18d is the shaft 1
7, the label holding roller 20 is rotatably attached to the tip ends of the bearing surfaces 18b and 18c by the roller shaft 19, and the engaging portion 21 formed on the lower bearing surface 18h of the engaging member 18d is provided. The operation portion 43 of the cassette B described later is engaged.

The roller support plate 18 has one end fixed to the head fixing plate 11.
By hooking the other end of the torsion coil spring 22 hooked on the fixed pin 22 'attached to the front end of the
It is urged counterclockwise in the drawing and the other end of the vertical connecting surface 18e forming the cutter 18i abuts on the front end of the head supporting plate 14 to be held at the position (second position) in FIG. .

In the cassette B, a label roll shaft 30 and a winding shaft 31 are arranged on a frame b thereof, and a platen roller 32 and a peeling member 33 are arranged at one side corner (lower left corner in the embodiment drawings). Label guides 35, 35 and the printer main body A are appropriately provided on a transfer path for guiding the label mount 34a from the label roll 34 attached to the label roll shaft 30 to the platen roller 32.
The label position detecting section 36 for reflecting the light emitted from the detecting element 10 attached to the cassette mounting section a so as to pass through the mount transfer path is provided.

The platen roller 32, as shown in FIGS. 6 and 7, has a frame body b.
Lower mounting plate 37, which is fixed horizontally at a space below the bottom of
A driven gear 38 is provided on a roller shaft 32 'of the platen roller 32 so as to be rotatably mounted on an upper mounting plate 37' disposed at a predetermined interval on the frame b. As shown in FIG. 8, the mounting structure of the roller shaft 32 'and the driven gear 38 is such that the driven gear 38 has a pair of bearing portions which protrude and face the periphery of a hole 39 into which the roller shaft 32' is inserted. Roller shaft 3 forming 40,40
2'is integrally formed with an angular shaft portion 41 having a pair of parallel surfaces formed on the peripheral surfaces fitted to the bearing portions 40, 40, and the angular shaft portion 41 is fitted in the bearing portions 40, 40. Insert the roller shaft 32 'into the hole 39 and attach it. According to the above mounting structure, compared with the mounting structure using screws, there is no damage or looseness of the screws, durability is improved and workability is excellent, and the bearing parts 40, 40
Even if the height of the shaft is lowered, reliable power transmission can be obtained, so that the size can be reduced.

Further, the peeling member 33 is also erected on the upper and lower mounting plates 37, 37 'at a position close to the platen roller 32.

On the lower mounting plate 37, a transmission gear 31b that meshes with the gear 9 on the printer main body A side, a driven gear 31a integrally attached to the lower end of the winding shaft 31 that meshes with the transmission gear 31b, and the platen roller 32 are also provided. ′ Driven gear 38 and intermediate gear 31 meshing with
Install c and. When the cassette B is mounted on the printer body A, the transmission gear 31b meshes with the gear 9 on the printer body A side to transmit the power of the motor M to the platen roller 32 and the winding shaft 31.

The lower mounting plate 37 is composed of a width surface interposed between the holding plates 3 and 3'of the printer main body A, and the one side holding surface 42 thereof holds the holding plate 3.
Further, the other side holding surfaces 42 'are inserted and held under the holding plates 3', respectively, and the vertical movement of the cassette B is restricted. The tip of the lower mounting plate 37 on the holding surface 42 side, that is, the lower mounting plate 37 near the peeling member 33 is provided with a portion wider than the holding surface 42 to form an operating portion 43. When it is mounted on the printer body A, it engages with the engaging portion 21 of the roller support plate 18.

On the bottom surface of the frame b of the cassette B, guide grooves 44 and guide projecting edges 45 are formed on both sides.
When the cassette B is mounted on the cassette B, it is fitted into the guide protrusion 4 and the guide groove 5 on the printer main body A side.
Is installed and guided to a predetermined position.

Further, on the bottom surface of the frame body b, an engaging plate 46 is provided in the substantially central front half portion.
Is oscillated vertically.

The engaging plate 46 is rotatably attached to the bottom surface of the frame b as a hinge portion 47 at the center of the inner end of the rear end of the engagement plate 46 so as to swing up and down, and one end of the hinge portion 47 is fixed to the bottom surface of the frame body b. By contacting the leaf spring 48, the hinge portion 47 is pressed and the front edge 46a of the engaging plate 46 is engaged with the step portion of the decorative plate 49 described later (FIG. 4).

As is clear from FIG. 4, a decorative plate 49 is provided on the front surface of the frame b.
And the stepped portion 4 formed on the back surface of the lower end of the decorative plate 49.
The front end edge 46a of the engaging plate 46 is brought into contact with the 9 ', whereby the lower limit position of the engaging plate 46 is set.

On the bottom surface of the engaging plate 46, engaging claws 5 projecting in a downwardly inclined shape.
0 and 50 are integrally formed so that when the cassette B is mounted, the engaging claws 50 and 50 are engaged with the hooking claws 7 and 7 of the cassette mounting portion a. The engaging claws 50, 50 have a slanted surface on the hinge portion 47 side, so that when the cassette B is inserted into the cassette mounting portion a and mounted, the engaging plate 46 moves upward against the elastic force of the leaf spring 48. The engaging claws 50, 50 ride up on the latching claws 7, 7, and when they get over them, the engaging plate 46 moves down by the leaf spring 48, and the engaging claws 50, 50 engage with the latching claws 7, 7. To do.

As shown in FIG. 1, the cassette B has a label roll 34 attached to a label roll shaft 30, a label mount 34a from the label roll 34, guides 35, 35, and a label position detector.
The label mount paper is guided through the 36, platen roller 32, and peeling member 33 to the winding shaft 31, and the leading end of the mount is hooked on the winding shaft 31.

The cassette B, which is loaded with the labeled mount, is attached to the printer main body A by inserting it into the cassette attachment portion a in the direction of the arrow in FIG.

When the cassette B is mounted, as described above, the guide groove 44 and the guide protruding edge 45 are the guide protruding edge 4 and the guide groove 5 of the cassette mounting portion a.
It slides on the holding surfaces 42, 4 of the lower mounting plate 37
2'is held by the holding plates 3, 3'of the cassette mounting portion a,
At the mounting end, the trailing edge of the cassette B abuts the stoppers 6, 6 of the cassette mounting portion a, and the engaging claws 50, 50 move over the latching claws 7, 7 and move downward, so that the stoppers 6, 6 are elastically moved. The cassette B is slightly pushed back to securely engage the engaging claws 50, 50 and the retaining claws 7, 7, and the heat generating portion of the thermal head 12 and the peripheral surface of the platen roller 32 are positioned at predetermined positions.

When the cassette B is mounted, the platen roller 32 of the cassette B is joined to the thermal head 12 via the label mount 34a, and the thermal head 12, the platen roller 32 and the peeling member 33 are arranged in close proximity to each other and the print issuing unit is provided. (Fig. 3).

On the other hand, when the cassette B is mounted, the operating portion 43 of the mounting plate 37 is engaged with the roller support plate 18 of the printer main body just before the lower end plate 37 of the cassette B is inserted into the cassette mounting portion a. The part 21 is pushed to move the support plate 18 into a torsion spring 22.
The label holding roller 20 is rotated counterclockwise against the elasticity of the label holding roller 20 to the position (first position) facing the peeling member 33 (FIG. 3).

The operating part 43 holds the engagement state with the engagement part 21 even when the cassette mounting is completed, and holds the holding roller 20 at the first position.

Therefore, when the label mount 34a passes through the peeling member 33, the label 34b issued by the print issuing unit is peeled off from the labeled mount 34a and moves toward the holding roller 20 and temporarily fixed on the roller 20 in a certain state. It is held, and winding in the direction of the winding shaft 31 is prevented.

Then, in order to detach the cassette B from the printer main body A, the operation of pulling out the cassette B with the engagement plate 46 of the cassette B being pushed up to disengage the engagement claws 50, 50 from the latch claws 7, 7. However, by pulling out the cassette B, the pressing state between the operating portion 43 on the cassette B side and the engaging portion 21 of the roller supporting plate 18 is released, so that the roller supporting plate 18 is rotated clockwise by the elasticity of the torsion spring 22. And then returns to the second position shown in FIG.

The second position is a position separated from the peeling member 33, assuming that the cassette B is mounted. As can be seen from FIG. 1, the cassette B separated from the printer main body A does not have a large member such as a holding roller which is an obstacle to the distribution of the labeled mount in the vicinity of the peeling member 33. The loading operation can be easily performed.

In the above embodiment, the cassette B is placed sideways and the printer main body A
However, as long as the configuration of the present invention is used, it is also possible to mount the cassette from the front of the printer main body in a standing state.

Further, the roller supporting plate 18 is always biased by the spring material in the direction away from the peeling member, but the present invention is not limited to this, and the spring material exceeds the dead point to move the label holding roller to the first position and the second position. Biasing to position, roller support plate
A means for moving the label holding roller 20 between the first position and the second position by the engagement of the engaging portion 21 of 18 and the operating portion 43 of the cassette B, and also for mounting the cassette in an upright state. In the above cassette type printer, a weight is attached in the vicinity of the engaging portion 21 of the roller supporting plate 18, and the holding roller 20
The second position also includes the one that does not use a spring material, such as the one that is moved by its own weight.

(Effect) According to the present invention, the holding roller does not hinder the loading and unloading of the cassette, the loading and unloading work of the cassette can be easily performed, and the operation portion on the cassette side when loading the cassette Since the holding roller is automatically arranged at a predetermined position in the vicinity of the peeling member in cooperation with the engaging portion of the holding roller, the operation is simple.

Further, when the cassette is mounted, the holding roller is provided so that the printed paper such as a label moves to the holding roller and is held, so that the printing paper is prevented from being rolled up and the printing is surely issued. obtain. Further, since the cassette is not provided with a holding roller, a narrow gap for arranging the printing paper is not formed, the loading property of the printing paper is not deteriorated, and the cost of the cassette is reduced.

[Brief description of drawings]

FIG. 1 shows the cassette type printer of the present invention. FIG. 1 (1) is a partial plan view of the printer main body, FIG. 1 (2) is a plan view of the cassette, and FIG. 2 is an enlarged main part of the printer main body. Sectional plan view, FIG. 3 is an enlarged sectional plan view of a main part with a cassette mounted, and FIG. 4 is a sectional view taken along line (IV)-(IV) of FIG.
FIG. 5 is a front view of essential parts in FIG. 2, FIG. 6 is a front view of the cassette with a part thereof being cut away, FIG. 7 is a bottom view of the cassette, and FIG. 8 is an exploded perspective view of the roller shaft end of the platen roller. It is a figure. In the figure, A ... Printer main body, B ... Cassette a ... Cassette mounting part, 12 ... Thermal head 32 ... Platen roller, 33 ... Peeling member 34 ... Label roll, 20 ... Holding roller 21 ... Engagement part, 43 ... Actuating part

Claims (1)

[Scope of utility model registration request] 1. A printer body is provided with a cassette mounting portion and a print head adjacent thereto, and a cassette is provided with a printing paper roll, a platen roller and a peeling member, and the cassette is detachably mounted to the cassette mounting portion of the printer body. In a cassette type printer having a print issuing unit composed of the print head, platen roller and peeling member, a print paper holding roller is rotatably attached to the printer body in the vicinity of the print issuing unit and the holding roller is placed at a predetermined position. An engaging portion for moving is provided, an operating portion for engaging with the engaging portion is provided in the cassette, and the operating portion and the engaging portion cooperate with each other when the cassette is mounted so that the holding roller faces the peeling member. 1 to move the holding roller to a second position separated from the peeling member by releasing the engaging portion and releasing the cassette. Tsu door printer.