JP4000849B2 - Jam handling mechanism of plate making machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate making machine that creates a master sheet as a printing original plate, and more particularly to a jam handling mechanism of a plate making machine.
[0002]
[Background]
As is well known, a large number of guide rollers are arranged along a guide plate that guides the master sheet in the master sheet path in the plate making machine, and the master sheet is moved along the guide plate by these guide rollers that are brought into rolling contact with the guide plate. Will be guided.
[0003]
By the way, in such a master sheet path, the conveyed master sheet may be in a “jammed” state in the middle. Therefore, a part of the guide roller described above is supported by a support frame that can be forcibly operated by hand. The support frame is provided with a lock member that can lock the support frame in the open position.
That is, in such a jam processing mechanism, the jammed master sheet is exposed to the outside only by manually operating the support frame to the open position, and the support frame can be locked to the open position by the lock member. The master sheet jammed in the same part can be removed.
[0004]
Therefore, according to such a jam processing mechanism, not only does the structure become complicated and the manufacturing cost becomes high, but also after the jam processing, to return the guide roller and the support frame to the normal state, the lock member is moved with one hand. It is necessary to return the support frame to the normal position with the other hand while forcibly moving and maintaining the same moving state.
[0005]
[Problems to be solved by the invention]
However, in the case of a paper-based master sheet, it can be broken in the middle and removed in order, so there is no problem. However, in the case of an aluminum foil-based sheet, it cannot be broken in the middle. There are many.
In other words, in the “jam” state of the aluminum foil-based master sheet, it is necessary to open and restore the support frames at multiple locations and to take out the master sheet. Therefore, a mechanism that requires operation with both hands requires maintenance. Work becomes complicated and time consuming.
[0006]
Recently, a digital plate making machine having a feed roll that scans a digital image from a laser scanning unit and an exposure table device that optically projects a document image is planned. Since the distance between the feed roll and the exposure table device approaches, the master sheet is likely to be jammed between the two, and there is a risk that it takes time to clear the jam at the same location.
The object of the present invention is to solve the problem of the jam processing mechanism of the conventional plate making machine as described above, and it is possible to easily remove the master sheet in a jam state by exposing it to the outside by a simple manual operation, and easily with one hand. It is to obtain a jam handling mechanism that can be recovered.
[0007]
[Means for achieving the object]
In order to achieve this object, the present invention comprises a guide plate positioned along the path of the master sheet, and a plurality of guide rollers attached to the surface of the guide plate so as to be adjacent to the feed direction of the master sheet. In the master sheet guide part of the plate making machine provided, a support frame that is rotatably attached to the apparatus fixing part by a pivot shaft while supporting at least one of the guide rollers, and is supported so that it can be forcibly turned from the outside. A first handle fixed to the frame; a locking lever that is pivotally supported on the device fixing portion by a fulcrum shaft facing the lock pin of the support frame and is urged in one direction by an urging spring; and the urging spring and a second handle that can forcibly rotate the same locking lever against the locking lever, the locking pin may lock-guide-locking Kusarijomizo, cam surface, the locking Has, in the normal state the lock pin is locked in Kusarijomizo, the lock pin by forced operation of the second handle is removed from the locking groove against the biasing spring, the first handle The present invention proposes a jam handling mechanism of a plate making machine, wherein the lock pin is locked to the locking surface by manual operation and the support frame is held in an open position.
[0008]
In the description of the preferred embodiments of the invention described below,
1) The jam handling mechanism of the plate making machine is an intermediate guide unit positioned between a feed roll that scans a digital image from a laser scanning unit and an exposure table device that optically projects a document image. The structure is described.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a plate making machine to which the present invention is applied shown in the drawings will be described below.
FIG. 1 shows an overall cross section of a digital plate making machine capable of processing a digital image or an original image as required. First, master sheet rolls of different sizes can be mounted on the lower right portion of the machine body 1 capable of shielding external light. A paper feeding device 2A and a second paper feeding device 2B are incorporated.
[0010]
The first sheet feeding device 2A and the second sheet feeding device 2B are designated as a detachable mounting drum 2a to which a master sheet roll can be attached, a feeding roller 2b for pulling out the leading end of the master sheet X, and the master sheet X. A cutter 2c that cuts into length and a sheet feed roller 2d are provided, and the cut master sheet X passes through the first path 3a and the second path 3b, and is located above the first sheet feeder 2A. 3 is sent out.
A charging electrode unit 4 for charging the master sheet X is provided in the middle of the paper feed path 3, and the master sheet X that has passed through the charging electrode unit 4 is centered at the upper part of the machine body 1 that is driven at a sub-scanning speed. The feed roll 5 is supplied.
A laser scanning unit 6 that scans an original image in a main operation direction perpendicular to the paper surface of FIG. 1 is positioned above the paper feed path 3, and a digital image from a computer (not shown) is displayed on the laser scanning unit. The surface of the feed roll 5 is scanned from 6.
[0011]
The original image is beam-scanned from the laser scanning unit 6 on the surface of the master sheet X positioned on the feed roll 5 while the feed roll 5 is rotating at a controlled speed. However, the latent image forming master sheet X passes through the intermediate guide unit 7 and is supplied to the exposure table device 8 arranged in a substantially vertical direction at a substantially central portion of the machine unit 1. It is delivered to the wet developing device 9 at the lower left.
A document table 10 for optically capturing a document image is provided in the upper left part of the machine body 1, and an image of the document on the document table 10 is exposed to an exposure table 8 a of the exposure table device 8 using an exposure optical system 11. Projected on the surface. That is, the illustrated exposure optical system 11 includes an illumination lamp 11a that illuminates a document table 10 on which a document is set, a projection lens 11b that forms a document image on the surface of the exposure table 8a, and a mirror 11c.
[0012]
The above-described wet developing device 9 has a developer nozzle 13 for ejecting a developer onto the developing pallet 12 through which the master sheet X passes, and is below the developing pallet 12 inclined downward in the conveying direction of the master sheet X. Has a developer tank 14 for collecting the developer.
Further, a squeezing roller device 15 is located at the rear end of the developing pallet 12, and excess developer on the surface of the master sheet X is removed by the rotational movement of the squeezing roller described later of the squeezing roller device 15. .
[0013]
The master sheet X on which the original image has been developed is dried by the heat fixing device 16 adjacent to the outlet side of the wet developing device 7 to fix the toner image, and is discharged by a discharge roller 17 provided at the lower left portion of the machine body 1. It will be collected on the collection tray 18 outside the body 1.
[0014]
FIG. 2 shows the details of the intermediate guide unit 7 to which the present invention is applied. The master sheet X that has passed through the feed roll 5 described above is guided by a guide plate 21 fixed to the machine body 1, and on the surface of the guide plate 21. The master sheet X is placed along the surface of the guide plate 21 by the plurality of guide rollers 22 placed in the rolling contact state.
That is, these guide rollers 22 are rotatably supported by a support frame 24 that can tilt with respect to a device fixing portion (not shown) with the pivot shaft 23 of the first handle 25 as a fulcrum. Further, a first handle 25 that can be held and rotated by hand is fixed to the support frame 24 urged counterclockwise by gravity. Therefore, the first handle 25 is used to pivot. When the first handle 25 is rotated clockwise about the support shaft 23, the support frame 24 fixed to the first handle 25 is forcibly rotated in the direction of the arrow and supported by the support frame 24. The guide roller 22 is separated from the guide plate 21, and the master sheet X sandwiched between the guide plate 21 and the guide roller 22 is exposed to the outside, and at the same time, the free state is achieved.
[0015]
A lock pin 26 is planted on the surface of the support frame 24 near the free end, and a locking lever 28 biased by a biasing spring 27 is attached to the device fixing portion adjacent to the lock pin 26. is there.
That is, the locking lever 28 can be rotated around a fulcrum shaft 29 that is rotatably supported by the device fixing portion, and an urging spring 27 comprising a coil spring spanned between the device fixing portion. Is urged counterclockwise with the fulcrum shaft 29 as a fulcrum. A second handle 31 having the fulcrum shaft 29 as a base is fixed to the lock pin 26, and the lock lever 28 is moved clockwise against the biasing spring 27 by holding the second handle 31. Can be forcibly rotated.
[0016]
A locking groove 32 and a cam surface 33 that can be engaged with the lock pin 26 of the support frame 24 are formed at an intermediate portion of the locking lever 28, and a support frame 24 is formed at the tip of the locking lever 28 as shown in FIG. When in the open position, a locking surface 34 is formed that engages the lock pin 26 to prevent the support frame 24 from returning to the normal position.
Therefore, when the lock pin 26 is removed from the lock groove 32 and the lock pin 26 is forcibly operated to the open position in FIG. 3, the lock pin 26 of the support frame 24 is received by the locking surface 34 of the lock lever 28. Therefore, the recovery of the support frame 24 to the normal position is prevented, and the support frame 24 and the guide roller 22 are held in the open position, so that the jammed master sheet X can be taken out with both hands.
[0017]
Next, the jam handling procedure of the intermediate guide unit 7 described above with reference to FIGS. 4 to 7 will be described.
First, during operation of the plate making machine, the support frame 24, the guide roller 22, and the locking lever 28 of the intermediate guide unit 7 are in the normal positions shown by the solid lines in FIG. 25 and the second handle 31 are also in the positions indicated by the solid lines.
In order to find and remove the jammed master sheet X, as shown by the arrow A in FIG. 4, the second handle 31 is first rotated and the locking lever 28 is rotated to lock the support frame 24. The locking groove 32 is removed from the pin 26.
Next, the first handle 25 is rotated as shown by an arrow B in FIG. 4 to rotate the support frame 24 about the pivot shaft 23 as shown in FIG.
[0018]
Thereafter, as shown in FIG. 5, when the hand is released from the second handle 31 and subsequently released from the first handle 25, the lock pin 26 is finally engaged with the locking surface 34, and the locking surface 34. The support frame 24 and the guide roller 22 are maintained in the open position of FIG.
Therefore, since this open state is maintained even if the hand is released from the first handle 25 and the second handle 31, as shown in FIG. Can be extracted from both spaces with both hands.
[0019]
After the jam processing is finished, as shown in FIG. 7, if the second handle 31 is temporarily rotated in the direction of arrow A, the lock pin 26 is detached from the locking surface 34 and the support frame 24 is in the normal position. However, when the hand is released from the second handle 31, the lock lever 28 is returned by the force of the biasing spring 27, and the lock pin 26 is engaged again with the lock groove 32 of the lock lever 28 to support the support frame. 24 is locked in the normal position.
[0020]
In the description of the above embodiment, the example in which the present invention is applied to the intermediate guide unit 7 has been described. However, the present invention can be applied to other sheet feeding path portions of the plate making machine until it is pointed out again. Nor.
[0021]
【The invention's effect】
As apparent from the above description, according to the present invention, it can be easily and reliably operated with one hand scanning, and since the open state is automatically maintained, and the master sheet jam state is externally exposed in both hands removed In addition, a jam handling mechanism that can be restored to a normal state by a simple operation can be obtained.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a digital plate making machine to which the present invention is applied.
FIG. 2 is an enlarged front view of an intermediate guide unit of the digital plate making machine.
FIG. 3 is a view corresponding to FIG. 2 of the intermediate guide unit in a jam processing position.
FIG. 4 is an operation explanatory diagram of the intermediate guide unit at a normal operation position.
FIG. 5 is an operation explanatory diagram of the intermediate guide unit when the second handle is returned.
FIG. 6 is an operation explanatory view of the intermediate guide unit during jam processing of a master sheet.
FIG. 7 is an operation explanatory diagram of the intermediate guide unit at the time of restoration.
[Explanation of symbols]
X Master sheet 5 Feed roll 8 Exposure table device 21 Guide plate 22 Guide roller 23 Pivot shaft 24 Support frame 25 First handle 26 Lock pin 27 Energizing spring 28 Locking lever 29 Support point shaft 31 Second handle 32 Locking groove 33 Cam surface 34 Locking surface

Claims (2)

In a master sheet guide part of a plate making machine comprising a guide plate positioned along the path of the master sheet and a plurality of guide rollers attached to the surface of the guide plate so as to be adjacent to the feed direction of the master sheet, A support frame rotatably attached to the device fixing portion by a pivot shaft while supporting at least one of the guide rollers, a first handle fixed to the support frame so as to be forcibly rotated from the outside, Facing the lock pin of the support frame, the locking lever is pivotally supported by the device fixing portion by the fulcrum shaft and urged in one direction by the urging spring, and the locking lever is forced against the urging spring and a second handle which can be pivoted in, the locking lever, the locking pin may lock-guide-locking Kusarijomizo, cam surfaces, has a locking surface, said under normal conditions Rokkupi Is locked in Kusarijomizo, the lock pin by forced operation of the second handle is removed from the locking groove against the biasing spring, the locking pin the locking by a manual operation of the first handle A jam handling mechanism of a plate making machine, wherein the support frame is held in an open position by being locked to a surface .   The jam processing mechanism of the plate making machine is an intermediate guide unit positioned between a feed roll that scans a digital image from a laser scanning unit and an exposure table device that optically projects a current image. The jam handling mechanism of a plate making machine according to claim 1.

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