JPH046025Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper mask device used for without border printing and borderless printing.

Traditionally, WB (with border) print or BL
When performing (borderless) printing, dedicated paper masks are used for each. Therefore, when switching from WB printing to BL printing, it was necessary to open the front cover of the printer and replace the paper mask. For this reason, not only does it take a considerable amount of time to replace the paper mask, but there is also a disadvantage that paper is wasted.

The present invention aims to provide a paper mask device that solves the above-mentioned drawbacks.

In order to achieve the above object, the paper mask device of the present invention includes a paper mask base having rectangular openings arranged on the upper surface of the paper mask base along each side of one set of the openings facing each other. The mask pieces of one set are arranged by a driven linking rod interposed between both of the mask pieces of the one set, and a swinging rod connected to the driven linking rod and pivotally connected to the paper mask base. , are interlocked and connected to be movable in the approaching direction and the separating direction while maintaining a parallel state, and one mask piece of the one set of mask pieces is moved by a cam, while the opening The other set of mask pieces arranged along each side of the other set facing each other connects each separate mask piece for the mask piece configuration to each separate mover in the turnbuckle mechanism, and It is characterized by being movable in the approaching direction and the separating direction by a mechanism.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the figure, reference numeral 10 denotes a paper mask base having a rectangular opening 11, and the paper mask base 10 has horizontal mask base members 12 and 12' juxtaposed on both sides of the paper conveyance path Mask base members 13 and 13' in the vertical direction perpendicular to the transport path X are assembled using screws or the like. The mask base members 12, 12' have bosses 14, 14' and 15, 15'(14', 1
5' (not shown) is provided. Along the inner and outer edges of mask base members 12 and 12', respectively, inner stops 16, 16' and outer stops 1 are provided.
7, 17' are provided protrudingly. mask base member 12,
12' has a guide groove 1 on its inner surface facing the opening 11.
8, 18', and pin guide elongated holes 19, 19' and 20,
There is 20'. Step portions 21, 21' are formed on the mask base members 13, 13' for arranging driven linking rods 40, 40', which will be described later.

30 and 30' are one set of mask pieces,
The mask pieces 30, 30' are placed on the upper surface of the paper mask base 10 and on the upper surfaces of the horizontal mask base members 12, 12' so as to be lined up on both sides of the paper transport path X. Step portions 31, 31' are formed on the lower surfaces of the mask pieces 30, 30' so as to engage with the inner stoppers 16, 16' of the mask base members 12, 12'. Step portion 31 of mask piece 30, 30',
The portion projecting inward from 31' extends beyond the inner stoppers 16, 16' of the mask base members 12, 12' and faces above the opening 11 of the mask base 10. Notches 32, 32' and 3 are provided at the outer edges of both ends of the mask pieces 30, 30', respectively.
3, 33' are formed, and notches 32, 32' and 33,
On the back side of the stepped portions 31, 31' at 33' are sliding pins 34, 34' and 35, 35'(34' and 3
5' (not shown) is provided protrudingly. sliding pin 34,
34', 35, 35' are respectively mask base member 1
By guiding through the bosses 14, 14' of 2, 12' and guide holes of 15, 15', the mask pieces 30,
30' is capable of reciprocating in the vertical direction. 3
6, 36' and 37, 37'(36' and 37' are not shown) are sliding pins 34, 34' and 35, 3, respectively.
This is a biasing spring wound around 5'. biasing spring 36,
Mask pieces 30,3 by 36' and 37,37'
0' step portions 31, 31' are mask base members 12, 1
It is adapted to come into pressure contact with the inner stoppers 16, 16' of 2'. Place the stepped portions 31, 31' on the inner stopper 1
6, 16', the sliding pins 34,
34', 35, 35' by screwing the adjusting nuts into the free ends of the bosses 14, 14', 15,
15'. One mask piece 3 of one set of mask pieces 30, 30'
Arms 38, 38' for connecting driven link rods are protruded from both ends of the mask piece 0, and forks 39, 39'(39' not shown) for engaging pins are protruded from both ends of the other mask piece 30'. There is.

Reference numerals 40 and 40' indicate driven link rods disposed within the stepped portions 21 and 21' of the mask base members 13 and 13';
1 and 41' are connected to driven linking rods 40 and 40', and pivot shafts 4 are connected to both ends of the mask base member 12'.
It is a swinging rod pivoted at 2,42'. The driven linking rod connecting arms 38, 38' of the mask piece 30 and one end of the driven linking rods 40, 40' are pivotally connected by pins 43, 43' passing through pin guide long holes 19, 19' of the mask base member 12. However, the pins 44, 44' protruding from the other ends of the driven linking rods 40, 40' pass through the long pin guide holes 20, 20' of the mask base member 12' to the swinging rods 41, 4.
loosely fit into elongated holes 46, 46' formed at one end of 1',
A pin 45 protruding from the other end of the swinging rod 41, 41',
45' is a fork 3 for pin engagement of the mask piece 30'
9, 39'.

With the above configuration, one set of mask pieces 3
0 and 30' are movably connected in the approaching direction and the separating direction by driven linking rods 40 and 40' and swinging rods 41 and 41' pivotally connected to the paper mask base 10.

50 is a cam contact plate attached to one mask piece 30 of one set of mask pieces 30, 30', and 52 is a rotating cam that cooperates with the cam contact plate 50. Rotating cam 52 is connected to paper mask base 10
The mask piece 30 is moved by being driven from outside the dark box of the printer by a pulse motor (not shown) disposed above the printer or other driving means. A lid plate 53 is attached to the mask base member 12 so as to cover the notches 32 and 32' of one mask piece 30 of one set of mask pieces 30 and 30'.
53' is attached, and cover plates 54, 54' are attached to the mask base member 12' so as to cover the notches 33, 33' of the other mask piece 30'.

60 and 60' are the other set of mask pieces,
The mask pieces 60, 60' are placed on the upper surfaces of the vertical mask base members 13, 13' and are formed on the inner surfaces facing the openings 11 of the horizontal mask base members 12, 12'. guide groove 18,1
8' so that it can reciprocate in the lateral direction. The different mask pieces 60, 60' constituting the other set of mask pieces 60, 60' are moved in the adjacent direction and on the slide shaft by separate movers in a turnbuckle mechanism driven by a pulse motor (not shown). The turnbuckle mechanism connects to each separate slider that slides in the direction of separation (see drawings 2 and 3 of Japanese Utility Model Application Publication No. 1143/1983, filed on the same day by the present applicant). and the other set of mask pieces 60,
60'.

Reference numeral 70 denotes a locking claw for locking the mask piece 30 in a close position and a separated position, and the locking claw 70
As shown in FIGS. 3 and 4, the mask piece 30
It is loosely fitted into the notch 32 of the mask piece 30 on the upper surface of the mask piece 30 and a shaft 71 that stands upright on a wall surface 77 provided in a stepped manner, and is held rotatably. Reference numeral 72 is a biasing spring whose one end is fixed to the wall surface 77, whose central part is wound around the shaft 71, and whose other end is locked to the lock pawl 70, and which rotates the lock pawl 70 counterclockwise around the shaft 71. At the same time, the lock pawl 70 is urged so as to keep in contact with the wall surface 77 at all times. Reference numeral 73 is a lock pin that cooperates with the lock pawl 70 and is erected on the mask base member 12. 74 is a stopper provided on the wall surface 77, and 75 is a relief groove provided on the back surface of the lock pawl 70, and the relief groove 75 has an arc shape when viewed from the side surface of the lock pawl 70. Although not shown, a locking pawl 70' having the same structure as the locking pawl 70 is loosely fitted on the notch 32' side of the mask piece 30, and a locking pin 73' that cooperates with the locking pawl 70' is attached to the base. It is erected on the member 12'.

The lock pawl 70 is arranged as shown in FIG.
It operates as shown in C, D, and E. That is, as shown in the right half of FIG.
Base members 12, 12' by 36' and 37, 37'
When the mask pieces 30 and 30' are in close contact with the inner stoppers 16 and 16', the lock claw 70
is separated from the lock pin 73 as shown in FIG. When the cam 52 is rotated approximately 1/2 turn in this state, the lock pawl 70 that moves together with the mask piece 30 changes from the state A to the state B in FIG. 4, and when the cam 52 stops rotating, As shown in FIG. 4C, the mask pieces 30 and 30' are locked by the lock pin 73, and the mask pieces 30 and 30' are separated and held in a wide spaced state as shown in the left half of FIG. Become.

Next, when the cam 52 is further rotated approximately 1/2 turn,
The lock pawl 70 changes from the state C to the state D, and is rotated counterclockwise by the biasing spring 72, so that the lock pin 73 is inserted into the relief groove 77 on the back side of the lock pawl 70.
Go inside. Lock pin 7 inserted into this relief groove 75
3, the escape groove 75 has an arc shape along the length direction of the lock claw 70, and the mask piece 30,
30' is pressed against the inner stopper 1 of the mask base member 12, 12' by the biasing springs 36, 36' and 37, 37'.
As the cam 52 rotates, due to the movement force of the mask pieces 30, 30' in the direction of the inner stoppers 16, 16' due to the biasing in the directions 6, 16'.
The lock pawl 70 is lifted up against the biasing force of the bias spring 72, and the end surface of the lock pin 73 is attached to the lock pawl 7.
It slips through the back side of 0 and returns from state E to state A.

Therefore, the paper mask device configured as described above is attached to the top surface of the easel box inside the printer's dark box, and the cam 52 is driven from outside the printer's dark box by an appropriate driving means, such as a pulse motor.
When rotated, the cam contact plate 50 and the driven linkage 40,
40' and the swinging rods 41, 41', the mask pieces 30, 30' of one set are brought close to each other and separated, and when the turnbuckle mechanism is driven by a pulse motor different from the pulse motor, they slide on the slide shaft. The other set of mask pieces 60, 60' is moved by each separate slider.
are close together and separated. When the mask pieces 30, 30' of one set and the mask pieces 60, 60' of the other set are brought close together, they are used for WB printing, and when they are separated, they are used for BL printing.

As is clear from the above description, according to the present invention, switching between WB printing and BL printing can be easily performed in a short time. Also,
WB, by operating from outside the printer's dark box.
Since the BL can be switched, paper loss that conventionally occurs when replacing paper masks can be eliminated. Furthermore, since switching between WB and BL is performed by a cam and a turnbuckle mechanism, the device can be made compact.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway plan view, Fig. 2 is a perspective view of the main part, Fig. 3 is an exploded perspective view of the main part, and Fig. 3 is a partially cutaway plan view. FIG. 4 is an explanatory diagram of the operation procedure of the lock pawl. 10... Paper mask base, 11... Opening, 12, 12'... Horizontal mask base member,
13, 13'... Vertical mask base member, 30,
30'... One set of mask pieces, 40, 40'...
Driven linking rod, 41, 41'... Swinging rod, 52... Cam, 60, 60'... Mask piece of the other set.

Claims (1)

[Scope of utility model registration request] One set of mask pieces is arranged on the upper surface of a paper mask base having a rectangular opening along each side of one set facing the opening. A driven link interposed between the two and a swinging link connected to the driven link and pivotally connected to the paper mask base enable movement in the approaching direction and away direction while maintaining a parallel state. one mask piece of the one set of mask pieces is connected to the other set so as to be moved by a cam, and the other set is arranged along each side of the other set facing the opening. The set of mask pieces is configured such that each mask piece for the mask piece structure is connected to a separate mover in a turnbuckle mechanism, and is movable in the approaching direction and the separating direction by the turnbuckle mechanism. Characteristic paper mask device.