JPH0244277Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a paper mask device used to determine the size of a print screen when printing a photographic negative on a vertically conveyed roll paper.

[Conventional technology]

It was devised to eliminate the need to replace the paper mask when arbitrarily changing the printing length in the longitudinal direction of the print screen for the same paper width size in printers that transport rolled paper horizontally. Paper mask devices have already been put into practical use. As shown in FIG. 6, the paper mask device described above includes a pair of L-shaped mask pieces 2 and 3, each of which has protruding strips 4 and 4 formed at the tips of the short sides of one of the mask pieces 2 and 3, respectively. A paper mask 1 whose opening can be changed in the length direction of the paper by slidably engaging grooves 5, 5 (one not shown) formed on the inner surfaces of the long sides of the mask pieces 3, 2. A pair of small holes 6, 6 are formed at intervals in the longitudinal direction on the long side of one mask piece 2, and the small holes 6,
6 is engaged with a pair of mask pins 8, 8 protruding from the horizontal mask fixing base 7, the paper mask 1 is mounted on the horizontal mask fixing base 7, and the paper mask 1 is mounted on the horizontal mask fixing base 7.
is reciprocated by a horizontal feed screw 10 rotated by a motor 9 and a horizontal guide member (not shown),
One end of the mask fixing base 7 and the short side of the other mask piece 3 are interlocked by a swingable interlocking arm 11, and the long side of the other mask piece 3 is rotatable with a biasing spring-equipped guide claw. 12, 12 to press one mask piece 2. In the conventional paper mask device described above, the direction in which the weight of the paper mask 1 acts matches the direction of the mask pins 8, 8 to which the paper mask 1 is attached, so that the paper mask 1 However, when paper is conveyed vertically, the direction in which the weight of the paper mask acts is perpendicular to the direction of the mask pin to which the paper mask is attached, making it difficult to attach the paper mask. It becomes difficult.

[Problem that the invention attempts to solve]

The object of the present invention is to provide a paper mask device that solves the above-mentioned difficulties that arise when paper in a roll is conveyed in a vertical direction.

[Means for solving problems]

In order to achieve the above-mentioned object, the paper mask device of the present invention includes a pair of L-shaped mask pieces, and a convex strip formed at the tip of the short side of one of the mask pieces is formed inside the long side of the other mask piece. The mask piece is slidably engaged with a groove formed on the side surface, and a guide groove is formed along the longitudinal direction on the surface of the tip of the long side of one mask piece, and the mask piece is slidably engaged with the guide groove. The proximal end of the connecting plate, which has a protrusion at the tip, is fixed to the surface of the short side end of the other mask piece to form a paper mask in which the opening can be changed in the length direction of the paper. A pair of potbellied holes are formed at intervals in the longitudinal direction on the long sides of the mask piece, and the potted holes are engaged with the necks of a pair of horizontal mask pins protruding from a vertical mask fixing base to fix the paper mask vertically. The mask fixing base is mounted on a fixed base, and the mask fixing base is moved up and down by a vertical guide member and a feed screw that is rotatably installed on the easel frame, and the lower end of the vertical mask fixing base is connected to the other mask piece. The short side is interlocked and connected by an interlocking arm that is slidably supported on the easel frame, and both the front and back sides of the long side of the other mask piece are pivoted to a fixed guide piece attached to the easel frame. A special feature is that the guide claw is biased toward the fixed guide piece by a biasing spring.

[Effect]

When the feed screw is rotated forward or backward, the vertical mask fixing base moves up and down, and the interlocking arm swings with the vertical mask fixing base.
The opening of the paper mask changes smoothly in the length direction of the paper. The hole for attaching one long side of the paper mask to the neck of the horizontal mask pin is a pothole hole, and both the front and back sides of the other long side are urged in the direction of the fixed guide piece by a fixed guide piece and a biasing spring. The short side of one mask piece and the long side of the other mask piece are connected by a connecting plate to allow sliding in the length direction of the paper. Therefore, it is easy to attach the paper mask to the vertical mask fixing base, and the paper mask does not disassemble or come off from the vertical mask fixing base during use.

〔Example〕

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

Figure 1 shows a front view, and Figure 2 shows a longitudinal side view.
In the drawings, FIG. 3 showing a cross-sectional plan view, and FIG. 4 showing an exploded perspective view of essential parts, 20 is a paper mask consisting of a pair of L-shaped mask pieces 22 and 23. Convex strips 24 and 25 are formed at the ends of the short sides of the mask pieces 22 and 23, respectively, and grooves 26 and 25 are formed on the inner surfaces of the long sides of the mask pieces 22 and 23, respectively.
27 is formed. Convex portion 24 of mask piece 22
is slidably engaged with the groove 27 of the mask piece 23, and the convex strip 25 of the mask piece 23 is slidably engaged with the groove 26 of the mask piece 22.
is slidably engaged with. Mask pieces 22 and 23
Blind guide grooves 28 and 29 (see FIG. 1) are formed along the longitudinal direction on the surface of the tip of the long side. The proximal ends of connecting plates 30 and 31 are fixed to the surfaces of the tips of the short sides of the mask pieces 22 and 23 with bolts or the like. Protrusions 32 and 33 are formed at the distal ends of the connecting plates 30 and 31 to slidably engage with the guide grooves 29 and 28, respectively. When the mask pieces 22 and 23 are assembled by engaging the protrusions 24 and 25 in the grooves 27 and 26, respectively, and the protrusions 32 and 33 in the guide grooves 29 and 28, respectively, the opening 21 is inserted into the long length of the paper. This results in a paper mask 20 that can be changed in direction. On one long side of the paper mask 20, that is, on the long side of one of the mask pieces 22, there are drilled holes 34, 34 formed by communicating a small diameter hole and a large diameter hole at intervals in the longitudinal direction. . 35, 35 is a vertical mask fixing stand 36
A pair of horizontal mask pins protruding from the back side of the
The paper mask 20 is mounted on the vertical mask fixing stand 36 by engaging the small diameter portions of the pothole holes 34, 34 with the necks 35', 35' of the mask pins 35, 35. Vertical mask fixing stand 3
A nut 37 is attached to the surface of the easel frame 60, and the nut 37 is screwed into a feed screw 38 rotatably provided on the easel frame 60. 39, 39 are vertical guide members that guide both side edges of the vertical mask fixing stand 36, and the vertical guide members 39, 39 are erected on the easel frame 60. Vertical mask fixing stand 3
6 is a nut 37, a feed screw 38, and a vertical guide member 3
It is designed to be raised and lowered by 9 and 39.
40 is an interlocking arm, and the interlocking arm 40 is connected to a support piece 4 erected on the easel frame 60 between the paper mask 20 and the vertical mask fixing base 36.
1 and is slidably supported by a pivot 42. At both ends of the interlocking arm 40, there are pins 45 that engage with a long hole 43 formed in the short side of the mask piece 23 and a groove 44 formed in the lower end of the vertical mask fixing base 36, respectively.
and 46 are provided protrudingly. Vertical mask fixing stand 36
The lower end of the mask piece 23 and the short side of the interlocking arm 4
They are interlocked and connected at 0. 47, 47 are fixed guide pieces attached to the easel frame 60 so as to come into contact with the surfaces of the long sides of the mask piece 23. Fixed guide pieces 47, 47 have spring hook pins 48, 48 and pivot 4.
9 and 49 are erected, and guide pawls 50 and 50 are rotatably attached to the pivots 49 and 49. The hook portions 51, 51 of the guide claws 50, 50 guide the back surface of the long side of the mask piece 23.
Reference numerals 52 and 52 indicate biasing springs wound around the pivot shafts 49 and 49. One end of the biasing springs 52 and 52 is engaged with the guide claws 50 and 50, and the other shaft part is engaged with the spring hanging pin 4.
8, 48, the guide claws 50, 5
0 is biased toward the fixed guide pieces 47, 47. 53 is a motor that drives the feed screw 38. Reference numeral 54 designates paper guides that protrude from the back surfaces of the long sides of the mask pieces 22 and 23. Easel frame 60
A pressure plate 55 that advances and retreats using a solenoid 56 is arranged on the back side of the paper.
100 is pressed against the back surface of the paper mask 20. 200 is the optical path. The paper mask device constructed as described above is used by being installed in a dark box 70 of a printer as shown in FIG.

Therefore, when the feed screw 38 is rotated forward or backward by the motor 53, the vertical mask fixing base 36 is moved up and down along the vertical guide members 39, 39 through the nut 37 screwed into the feed screw 38, and horizontally The L-shaped mask piece 22 moves up and down via the mask pins 35, 35. At the same time, an interlocking arm 40 is provided at both ends with a pin 46 that engages with the groove 44 at the lower end of the vertical mask fixing base 36 and a pin 45 that engages with the elongated hole 43 of the L-shaped mask piece 23. swings, and the L-shaped mask piece 23 moves up and down in the opposite direction to the L-shaped mask piece 22. As described above, the L-shaped mask pieces 22 and 23 move up and down in opposite directions at the same time, so that the opening 21 of the paper mask 20 changes smoothly in the length direction of the paper 100. The protrusion 32 of the connecting plate 30 fixed to the mask piece 22 is engaged with the guide groove 29 of the mask piece 23, so that the mask piece 2
The engagement between the protrusion 24 of No. 2 and the groove 27 of the mask piece 23 does not come off. Similarly, since the protrusion 33 of the connecting plate 31 is engaged with the guide groove 28, the protrusion 25 and the groove 26 are not disengaged from each other. paper mask 20
Connect the nodaruma holes 34, 34 with horizontal mask pins 35, 3.
5, and then by locking the small diameter portions of the bellow holes 34, 34 to the necks 35'35' of the horizontal mask pins 35, 35, the paper mask 20 can be easily mounted on the vertical mask fixing base 36. It is. The paper mask 20 has fixed guide pieces 47, 47 on both sides of the long side without the pothole holes 34, 34.
is guided by the hook portions 51, 51 of the guide claws 50, 50, and the guide claws 50, 50 are guided by the biasing springs 52, 5.
2 in the direction of the fixed guide pieces 47, 47, the paper mask 20 is pressed, and the small diameter portions of the potbellied holes 34, 34 are pushed into the neck portions 35', 35' of the horizontal mask pins 35, 35. The material is pressed into contact with the material, and there is no wobbling.

[Effect of idea]

According to the present invention, the opening can be changed smoothly in the length direction of the paper. A paper mask can be easily attached to a vertical mask fixing stand. The paper mask does not rattle during use, and furthermore, it does not disassemble or fall off the vertical mask fixing base.

[Brief explanation of the drawing]

Drawings 1 to 5 show an embodiment of the present invention, in which Fig. 1 is a front view and Fig. 2 is a front view.
Figure 3 is a cross-sectional plan view taken along the - line in Figure 1, Figure 4 is an exploded perspective view of the main parts seen from the back, Figure 5 is the arrangement showing the state of use. 6 are exploded perspective views of the main parts of a conventional paper mask device. 20...paper mask, 21...opening, 2
2, 23... L-shaped mask piece, 24, 25... Convex strip, 26, 27... Groove, 28, 29... Guide groove,
30, 31... Connection plate, 32, 33... Protrusion, 3
4...Dharma hole, 35...Horizontal mask pin, 3
5'... Neck, 36... Vertical mask fixing stand, 38
...Feed screw, 39...Vertical guide member, 40...
Interlocking arm, 47... Fixed guide piece, 50... Guide claw, 52... Biasing spring, 60... Easel frame.

Claims (1)

[Scope of utility model registration request] A pair of L-shaped mask pieces are each configured such that a convex strip formed at the tip of a short piece of one mask piece is slidably engaged with a groove formed on an inner surface of a long side of the other mask piece, and one A guide groove is formed along the longitudinal direction on the surface of the distal end of the long side of the mask piece, and the proximal end of the connecting plate, which has a protrusion at the distal end that slidably engages with the guide groove, is attached to the other side. A paper mask is formed by adhering to the surface of the tip of the short side of the mask piece to form a paper mask whose opening can be changed in the length direction of the paper, and a pair of potholes are attached to the long side of one mask piece at intervals in the longitudinal direction. Drilling holes and engaging the necks of a pair of horizontal mask pins protruding from the vertical mask fixing base to attach the paper mask to the vertical mask fixing base;
The mask fixing base is raised and lowered by a vertical guide member and a feed screw rotatably installed on the easel frame, and the lower end of the vertical mask fixing base and the short side of the other mask piece are connected to the easel frame. A fixed guide piece is connected to the body by an interlocking arm swingably supported on the body, and a fixed guide piece is attached to the easel frame on both sides of the long side of the other mask piece, and a biasing spring is pivotally attached to the fixed guide piece. A paper mask device characterized in that the paper mask device is guided by a guide claw that is biased in the direction of the fixed guide piece.