JP4501779B2 - Paper cassette of plate making machine - Google Patents

Description

  The present invention relates to a plate making machine for producing a printing original plate, and more particularly to a paper feed cassette for storing stacked master paper.

  As is well known, in an electrophotographic copying machine, a plate making machine, etc., sheets and master paper in a state of being cut in advance to a predetermined size are stored in a paper feed cassette and supplied one by one from this paper feed cassette.

  FIG. 1 shows a conventional paper feeding cassette used in a plate making machine. A master paper M placed in a cassette body A in a stacked state has a trailing edge positioned by a trailing edge positioning member B, and a right guide plate Positioned in the cassette body A in a state where the position is regulated by the RG and the left guide plate LG, the sheets are fed out one by one in the paper feeding direction X. That is, a plurality of positioning screw holes E aligned in the width direction perpendicular to the sheet feeding direction are formed on the surface of the cassette body A, and any one of these positioning holes E is selected to fix the long hole C and the fixing hole E. The right guide plate RG and the left guide plate LG are fixed to the cassette body A by the screws D.

That is, by selecting the positioning screw hole E and fixing with the long hole 6 and the fixing screw D, the orientation of the right guide plate RG and the left guide plate LG is maintained in the direction parallel to the paper feeding direction X, and the right guide plate RG The distance from the left guide plate LG is set to the width of the master paper M to be used.
JP-A-2004-210468 JP2004-217387

  By the way, in recent plate making machines, the right guide plate RG and the left guide plate LG are set by aligning the rear end portions of the right guide plate RG and the left guide plate LG with the master dimension display H. FIG. As shown in an enlarged manner, the types of master paper M to be used, that is, master papers M having different vertical and horizontal dimensions are very large, and due to a subtle difference in the width direction, a part of the positioning screw hole E is overlapped. It must be formed.

When the screw D is screwed into the wrong positioning screw hole E, the master paper M is set in a direction inclined with respect to the paper feeding direction X, and an image is formed in a state inclined on the surface of the master paper M. Problems arise.
In addition, in the case of the positioning screw hole E in a partially overlapped state, the frequency of making a mistake in the positioning screw hole E into which the positioning pin F is to be inserted becomes high, which also causes the formation of a tilt image.
An object of the present invention is to solve the problem of the paper cassette of the conventional plate making machine as described above, even if the paper cassette is loaded with various types of master papers having different dimensions. To obtain a paper feed cassette of a plate making machine that can reliably obtain the position and direction of the guide plate corresponding to the above.

  To achieve this object, according to the present invention, a pair of guide plates are positioned on both sides of a stacked master paper loaded in the cassette body, and aligned in the width direction perpendicular to the feeding direction of the master paper. A plurality of positioning screw holes are formed so as to face at least one of these guide plates, and in the width direction on the fixed ears of the guide plate where the position is indexed by matching the master dimension indication displayed on the cassette body. In a paper feeding cassette of a plate making machine that guides a master paper in a paper feeding direction by forming a long hole extending and screwing a fixing screw penetrating through the long hole into a selected one of the positioning screw holes, The long hole is formed in the width direction extension portion displaying a plurality of corresponding dimension indications adjacent to each other in the sheet feeding direction on the surface, and is positioned on the surface of the width direction extension portion so as to be movable in a direction parallel to the sheet feeding direction. A plurality of longitudinal positioning holes and longitudinal guide grooves that can engage with the positioning protrusions and the positioning protrusions that are spaced apart in the paper feeding direction provided in the positioning plate are formed in the same width direction extension portion, and the length direction A see-through window for seeing through the master dimension display corresponding to the positioning hole is formed on the positioning plate, and a plurality of pairs of corresponding dimension holes that are matched with the elongated hole are positioned according to the see-through positioning screw hole from the positioning plate. A paper cassette for a plate making machine is proposed in which a fixing screw is screwed into a positioning screw hole through the corresponding dimension hole formed at both ends in the longitudinal direction of the plate and corresponding to the long hole.

  According to the present invention, the position of the corresponding dimension hole is determined simply by aligning the see-through window of the positioning plate with the corresponding dimension display displayed on the extension in the width direction of the guide plate, and the fixing screw is accommodated through the corresponding dimension hole. Because the guide plate can be screwed in the positioning screw hole, the guide plate can be accurately set in parallel with the paper feed direction, and the distance in the width direction between the left and right guide plates can be set accurately. Can be easily accommodated.

In the description of the preferred embodiments of the invention described below,
1) The corresponding dimension display has a plurality of display dimensions adjacent to each other in the width direction, and the corresponding dimension holes are positioned at different positions in the width direction corresponding to the same display dimension positions at different positions in the width direction. Structure formed on the board,
2) The structure in which the width direction extension portions are provided on the right guide plate and the left guide plate, and the positioning plates are positioned on the width direction extension portions, respectively.

The details of the embodiment of the present invention will be described below with reference to FIGS.
FIG. 2 shows the entire sheet cassette of the plate making machine according to the present invention. The sheet cassette includes a cassette body 1 on which a master paper M in a stacked state can be loaded. The upper surface of the cassette body 1 is a removable upper lid 2. Covered. Then, the loaded master paper M is fed out in the paper feeding direction X in order from the highest one, and an image is formed on the surface.

That is, inside the cassette body 1, the rear end positioning member 3 that determines the position of the rear end edge of the master paper M and the width 2 of the master paper M (direction perpendicular to the paper feeding direction X) are aligned 2. A plurality of positioning screw holes 4F and 4B (shown in FIG. 3) are formed in the row, and the right guide plate 5 and the left guide plate 6 are selected according to the master dimension display 7 displayed on the rear surface of the cassette body 1. It is the same as in the prior art in that the fixing screws 9 and 10 fixed to one of the screw holes 4F and 4B are set at intervals corresponding to the width dimension of the loaded master paper M.
A separation claw 5b is attached to the front end of the right guide plate 5, and the uppermost master paper is separated from other master paper by the separation claw 5b. It is paid out one by one.

In the illustrated embodiment, the present invention is applied to the right guide plate 5 described above.
That is, as shown in FIG. 4, the right guide plate 5 having a “T” -shaped cross section has a width direction extension portion 5a, and fixing screws 9 and 10 can be inserted into the width direction extension portion 5a. A plurality of long holes 11 and 12 are formed. Then, a plurality of corresponding dimension displays 15 whose positions are different in the length direction (direction parallel to the paper feeding direction X) are displayed on the surface of the width direction extension portion 5a. These corresponding dimension indications 15 are in a one-to-one correspondence relationship with the master dimension indications 7 displayed on the surface of the cassette body 1, and are arranged so that the adjacent ones in the width direction are adjacent in the length direction. Is done. Also, in these corresponding dimension indications 15, those with greatly different width dimensions are devised to be arranged adjacent to each other in the width direction, and by these arrangements, a large number of dimension indications are attached in a small area. is there.

A positioning plate 16 that can be adjusted in the length direction is positioned on the surface of the width direction extension portion 5a, and a positioning plate 16 having a handle 16a that can be held by a fingertip is positioned at the rear end portion. In the positioning plate 16 shown in FIG. 5, a see-through window 17 capable of exposing a part of the corresponding dimension display 15 described above to the outside is formed at an intermediate portion in the longitudinal direction.
The positioning plate 16 is formed by projecting a pair of positioning projections 18F and positioning projections 18B whose positions are different in the length direction downward. A plurality of lengthwise positioning holes 20 and lengthwise guide grooves 21 corresponding to the positioning protrusions 18F and 18B are formed on the surface of the right guide plate 5 described above. The positioning protrusion 18F is inserted into one of the holes 20, and the positioning protrusion 18B is inserted into the slot-like length direction guide groove 21, respectively.

  That is, since the arrangement pitch of the length direction positioning holes 20 arranged in the length direction is the same as the arrangement pitch in the length direction of the corresponding dimension display 15 described above, the positioning protrusions 18F can be arranged in any length direction. When inserted into the positioning hole 20, only the corresponding dimension display 15 corresponding to the positioning hole 20 in the same length direction is exposed from the fluoroscopic window 17 to the outside from the transparent window 17 of the positioning plate 16, and the right guide is displayed by the display of the corresponding dimension display 15. It can be immediately known that the plate 5 is in a position to be designated. In this case, since the positioning projection 18B moves in the length direction along the length direction guide groove 21 regardless of which length direction positioning hole 20 the corresponding dimension display 15 is positioned in, the right guide plate 5 and the positioning plate 16 always maintains a parallel relationship with the paper feeding direction X.

The positioning plate 16 has a plurality of pairs of corresponding dimension holes 23 and 24 formed at the front end portion and the rear end portion thereof, and has the same length as the corresponding dimension display 15 and the length direction positioning hole 20. The corresponding dimension holes 23 and 24 arranged at the directional arrangement pitch constitute a plurality of sets of screw insertion holes located at positions separated by the distance between the long holes 11 and 12 in the length direction.
When the right guide plate 5 is adjusted to a position corresponding to the master paper M having a size to be used, when the corresponding dimension display 15 having a desired dimension is displayed on the transparent window 17, the corresponding dimension holes 23 and 24 are respectively inserted. The positions of the fixing screws 9 and 10 are exactly matched with the corresponding positioning screw holes 4F and 4B, and at the same time, the position of the right guide plate 5 in the width direction corresponds to the side edge position of the master paper M to be used automatically. In addition, the direction of the right guide plate 5 is parallel to the paper feeding direction X.

In the case of the illustrated embodiment, a plurality of corresponding dimension indications 15 and corresponding dimension holes 23 and 24 adjacent to each other in the width direction are provided. The reason for this is that if only the corresponding dimension display 15 and the corresponding dimension holes 23 and 24 adjacent in the length direction are used, the number of types of the master paper M to be loaded (used) increases. This is to prevent the length of the right guide plate 5 and the positioning plate 16 from becoming unnecessarily long due to the limitation of the arrangement pitch subdivision of the dimension holes 23 and 24.
In other words, the display of the master paper M having a size greatly different in the width direction is adjacent to the corresponding dimension display 15 in the width direction, and the corresponding dimension holes 23 and 24 corresponding to these dimension indications are positioned in the width direction. Thus, the right guide plate 5 and the positioning plate 16 do not need to be lengthened more than necessary, and a large number of types of master paper M can be handled in a compact manner.

Since the paper cassette of the plate making machine according to the illustrated embodiment has the above-described structure, the right guide plate 5 and the left guide plate 6 that accurately correspond to various types of master paper M having slightly different widthwise dimensions. Since the position and direction can be obtained, the tilted feeding of the master paper M can be prevented, and an image having no tilt can be formed on the surface of the master paper M.

  In order to adjust the position of the right guide plate 5 to a position accurately corresponding to the master paper M to be used, the corresponding dimension display 15 corresponding to the nominal size of the master paper M is exposed from the fluoroscopic window 17 to the outside. The positioning protrusion 18F and the positioning protrusion 18B may be dropped into the corresponding dimension holes 23 and 24 that coincide in this state. By matching the positioning projections 18F and the positioning projections 18B with respect to the corresponding dimension holes 23, 24, only the specific corresponding dimension holes 23, 24 match the positioning screw holes 4F, 4B. If the fixing screws 9 and 10 are fixed to the positioning screw holes 4F and 4B through the holes 11 and 12, a parallel relationship with respect to the position in the width direction of the right guide plate 5 and the paper feeding direction X is automatically obtained.

  In the case of the position adjustment of the right guide plate 5, when there are a plurality of corresponding dimension displays 15 seen through from the see-through window 17 in the width direction, the nominal size display of the master paper M to be used is centered in the width direction of the see-through window 17. If the right guide plate 5 is finely adjusted in the width direction along the long holes 11 and 12, the right guide plate 5 is translated in parallel with the paper feed direction X. That is, when the nominal size display of the master paper M is at the center in the width direction of the see-through window 17, the specific positioning screw holes 4F and 4B are inserted into the long holes 11 and 12 and the specific corresponding dimension holes 23 and 24 and the fixing screw 9 is inserted. 10, the right guide plate 5 and the positioning plate 16 are completely fixed to the cassette body 1 by tightening these fixing screws 9, 10 in the positioning screw holes 4F, 4B.

  In the above-described embodiment of the present invention, the example in which the present invention is applied to the right guide plate has been described. However, the present invention may be applied to the left guide plate, and the present invention is applied to both the left and right guide plates. You may apply.

It is a top view of the paper feed cassette of the conventional plate making machine. It is a disassembled perspective view of the paper feed cassette of the plate making machine by this invention. It is an enlarged plan view of the main part of the same sheet cassette. FIG. 6 is a plan view, a right side view, and a cross-sectional view taken along line AA of the right guide plate and the positioning plate of the sheet cassette. It is a top view, a right side view, and a rear view of the positioning plate. It is the top view of the right guide plate, a right view, and a BB sectional view.

Explanation of symbols

M Master paper 1 Cassette body 5 Right guide plate 5a Width direction extension 4F, 4B Positioning screw holes 9, 10 Fixing screw 11, 12 Long hole 15 Corresponding dimension display 16 Positioning plate 17 Viewing window 18F Positioning projection 18B Positioning projections 23, 24 Corresponding dimension hole

Claims (3)

  A pair of guide plates are positioned on both sides of the master paper in a stacked state to be loaded inside the cassette body, and a plurality of positioning screw holes aligned in the width direction perpendicular to the feeding direction of the master paper are provided in these guide plates. A long hole extending in the width direction is formed in the fixed ear of the guide plate which is formed so as to face at least one of the guide plate and is aligned with the master dimension display displayed on the cassette body. In a paper feeding cassette of a plate making machine that guides a master paper in a paper feeding direction by screwing a fixing screw penetrating into a selected one of the positioning screw holes, a plurality of adjacent papers in the paper feeding direction on the surface The elongated hole is formed in the width direction extension portion displaying the corresponding dimension indication, and is separated in the paper feed direction provided on the positioning plate positioned on the surface of the width direction extension portion so as to be movable in a direction parallel to the paper feed direction. A plurality of lengthwise positioning holes and lengthwise guide grooves that can be engaged with a pair of positioning protrusions formed in the same widthwise extending portion, and a see-through window for seeing through a master dimension display corresponding to the lengthwise positioning holes Are formed on the positioning plate, and a plurality of pairs of corresponding dimension holes are formed at both longitudinal ends of the positioning plate in accordance with the see-through positioning screw holes from the positioning plate. A sheet feeding cassette of a plate making machine, wherein a fixing screw is screwed into a positioning screw hole through the corresponding corresponding dimension hole.   The corresponding dimension display has a plurality of display dimensions adjacent to each other in the width direction, and the corresponding dimension hole corresponds to the same display dimension position that is different in the width direction and is positioned on the positioning plate at different positions in the width direction. 2. The paper feeding cassette of the plate making machine according to claim 1, wherein the paper feeding cassette is formed. The said width direction extension part is provided in a right guide plate and a left guide plate, and a positioning board is each positioned in these width direction extension parts, The Claim 1 or Claim 2 characterized by the above-mentioned. Paper cassette of the plate making machine.