JPH09226223A - Printing plate discharge unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to reduce the occupying space except a printing plate discharge case and to decrease in size an apparatus by integrating and incorporating a compressing plate for compressing the printing plate contained in the case and a compressing mechanism in the case of a printing plate discharge unit for containing the used plate used in a printer. SOLUTION: A compressing plate 8 for compressing a printing plate 8 and its compressing mechanism 9 are integrally disposed at the upper side of a printing plate discharge case 7. The mechanism 9 has a rotary shaft 9a fixed to the one end of the plate 8, and a gear 9b fixed to the shaft end of the shaft 9a. The gear 9b is engaged with a bear 10a as driving means 10 driven by a reversibly rotatable motor in the state that the case 7 is mounted in the body of a stencil printer 1 to transmit the drive of the means 10 to the plate 8. Thus, when the conveyance of the plate 3 to the case 7 is completed, the gear 10a is rotated counterclockwise, and the plate 8 is rotated clockwise to a two-dotted chain line position via the gear 9b and shaft 9a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate discharge unit of a printing apparatus which stores a used plate (master) used in a printing apparatus such as a stencil printing apparatus.

[0002]

2. Description of the Related Art A stencil printing machine prints a plate (master) by heat-sensitive punching, winding it around a printing drum, supplying ink into the printing drum, and transferring the ink passing through the holes of the master to the printing paper. Print the image on. After the printing is completed, the master wound around the print drum is usually peeled off from the print drum, discharged onto the plate discharge tray, and discarded by the operator. However, in the stencil printing apparatus of the type that manually discards the used master, the operator's hands and clothes are often soiled by the ink adhering to the plate. Therefore, conventionally, a plate discharge device for accommodating a used master separated from the printing drum and conveyed in a plate discharge box has been proposed and is generally used.

[0003] Here, if the used masters are simply stacked in the discharge box in a state of being naturally dropped, the plates become bulky, and the plates cannot be stored efficiently. For this reason, in this type of plate discharge device
No. 5, JP-A-59-11281, and Japanese Patent Application No. 7-161697, an elevating mechanism including an arm and a rotating shaft, a pantograph-shaped arm, or an eccentrically rotating cam. The compression mechanism is configured to move the compression plate up and down in the stencil box by a driving unit including a gear or a disc and a motor to compress and store the used master.

[0004]

However, in the above-mentioned conventional plate discharging apparatus, a compression plate for compressing the plate accommodated in the plate discharging box and a compression plate for moving the compression plate up and down in the plate discharging box. Since the mechanism and the drive means of the compression mechanism are disposed on the apparatus main body side, in order to be able to attach / detach the plate ejection box to / from the apparatus main body, a plate ejection unit is attached / detached when attaching / detaching the plate ejection box to / from the apparatus main body. It is necessary to retract the compression plate and the compression mechanism to the position where they do not interfere with the plate discharge box that is attached and detached.

Therefore, in the conventional plate discharge unit, the space occupied by the compression plate and the compression mechanism in the upper and side portions of the plate discharge box is large, and the volume occupied by the plate discharge box is limited. There is a problem that the plate discharge unit becomes large in size when the plate discharge box has a small capacity and the plate discharge box has a large capacity.

Further, in the conventional plate discharging unit, since the compression plate is on the side of the apparatus main body, the plate is placed on the top or side of the plate discharging box.
It is necessary to provide an opening large enough for the compression plate to move back and forth. For this reason, in the conventional plate discharge unit, when the plate discharge box is taken out from the apparatus main body, there is a high possibility that the plate that rebounds due to the retracting of the compression plate and sticks out of the opening of the plate discharge box may stain or jam inside the apparatus. In order to solve this problem, the operator may operate while pressing the plate protruding from the opening of the stencil box, but such an operation causes the operator's clothes and hands to be soiled.

[0007]

In order to solve the above-mentioned problems, the present invention has a compression plate and its compression mechanism built into a plate discharge box, and the plate is compressed by the plate and the plate discharge box. It is configured so that it can be taken out together with the mechanism. This allows
The occupying space of the plate discharge unit other than the plate discharge box can be reduced, and the device can be downsized. Furthermore, by incorporating the compression plate and its compression mechanism into the stencil box, it is possible to take out the stencil box with a larger amount of hermetically sealed inside the box. It can be operated without the need for soiling the operator's hands and clothes when the plate is discarded.

Further, drive means of a compression mechanism for raising and lowering the compression plate is installed on the apparatus main body side, and when the plate discharge box is housed in the apparatus main body, the drive force of the drive means can be transmitted to the compression mechanism. It is configured to be combined with. With this, the driving means of the compression mechanism can be installed on the upper part of the stencil box, so that the compression box can be taken out in the front direction with respect to the apparatus main body.
The operability when attaching and detaching the stencil box is improved.

When the stencil box is taken out from the apparatus body, the compression plate is locked by the stopper mechanism at the non-compressed position in the stencil box. As a result, the compression plate does not move when the plate in the plate discharge box taken out from the device body is discarded,
It is easy to discard the plate.

Further, the stopper mechanism is provided with a lock releasing mechanism for releasing the lock with respect to the compression plate when the plate discharge box is housed in the apparatus body. As a result, the drive mechanism does not drive the compression plate and its compression mechanism while the compression plate remains locked at the non-compression position in the stencil box by the stopper mechanism, and the drive system and the stopper mechanism are damaged. Is avoided.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

In FIG. 11, after printing is completed by the stencil printing machine 1, in the used plate 3 wound around the printing drum 2, the peeling roller 4 is located on the printing drum 2 side (the position shown by the dotted line in FIG. 11). ) To rotate in the counterclockwise direction and the printing drum 2 rotates in the counterclockwise direction, so that the printing drum 2 is separated from the printing drum 2. Then, the plate 3 separated from the printing drum 2 is sandwiched and conveyed by the nip between the separation roller 4 and the plate discharge roller 5 which are returned to the position shown by the solid line in FIG. Through the opening 7a of the plate discharge box 7 of the plate discharge unit 6 arranged in
It is housed in the stencil box 7.

A compression plate 8 for compressing the plate 3 accommodated in the plate discharge box 7 and a compression mechanism 9 are integrally provided at an upper portion inside the plate discharge box 7. The compression mechanism 9 in this embodiment includes a rotary shaft 9a fixed to one end of the compression plate 8 and a gear 9b fixed to the shaft end of the rotary shaft 9a. With the stencil box 7 mounted inside the main body, the gear 9a meshes with the gear 10a as the driving means 10 driven by a motor (not shown) capable of rotating in the normal and reverse directions.
The drive of the drive means 10 is transmitted to the compression plate 8. As a result, in FIG. 11, when the conveyance of the plate 3 into the plate discharge box 7 is completed, the gear 10a is rotated counterclockwise and the gear 9b is rotated.
Also, the compression plate 8 is rotated clockwise through the rotary shaft 9a (compression mechanism 9) until it reaches the position indicated by the chain double-dashed line. Version 3 is
By the rotation of the compression plate 8, the plate is compressed and accommodated in the plate discharge box 7. Thereafter, via the gear 9b and the rotary shaft 9a (compression mechanism 9), the gear 10a is rotated in the clockwise direction until the compression plate 8 is returned to the original solid line position, and the next plate 3 is placed in the discharge box 7. It waits until it is transported.

When the above-described operation is repeated and the plate 3 stored in the plate discharge box 7 becomes full, a not-shown full sensor is activated to notify the operator of the fact. In response to this, when the operator pulls out the plate discharge box 7 toward the front side of the apparatus main body, the gear 10a as the driving means 10 and the gear 9b as the compression mechanism 9 are disengaged from each other, and the plate discharge box 7 and the compression plate 8 are removed. Together with the compression mechanism 9, it is separated from the apparatus main body. Then, the operator discards the plate 3 in the plate discharge box 7 and returns the empty plate discharge box 7 to the inside of the apparatus main body, whereby the plate discharge operation is restarted.

However, in the plate discharge unit of this embodiment, since the compression plate 8 rotates about the rotary shaft 9a, the plate 3 conveyed to the area A shown by hatching in FIG.
On the other hand, there is a problem that the compression force of the compression plate 8 is hard to act.

The plate discharge unit shown in FIG. 12 is an example in which the problem of the above embodiment is solved, and the plate 3 accommodated in the plate discharge box 7 is compressed in the upper part inside the plate discharge box 7 of this embodiment. Compression plate 8 and a rack 9 as the compression mechanism 9
and c are arranged as an integral member. The rack 9c as the compression mechanism 9 in this embodiment is provided with the stencil printing apparatus 1
Drive means 10 driven by a motor (not shown) capable of rotating in the reverse direction in a state where the plate discharge box 7 is mounted in the apparatus main body.
The drive of the drive means 10 is transmitted to the compression plate 8 by meshing with the pinion 10b. As a result, FIG.
2, when the transport of the plate 3 into the plate discharge box 7 is completed,
The pinion 10b is rotated counterclockwise and the rack 9c
The compression plate 8 is lowered via the (compression mechanism 9). Edition 3
Is compressed and accommodated in the plate discharge box 7 by the lowering of the compression plate 8. After that, the pinion 10b is rotated in the clockwise direction through the rack 9c until the compression plate 8 is returned to the original position, and the next plate is waited for being conveyed into the plate discharge box 7.

When the amount of the plate 3 accommodated in the plate discharge box 7 becomes full by repeating the above-described operation, a not-shown full sensor is activated to notify the operator of that fact. In response to this, when the operator pulls out the plate discharge box 7 to the front side of the apparatus main body, the pinion 10b as the driving means 10 and the rack 9c as the compression mechanism 9 are disengaged, and the plate discharge box 7 is compressed by the compression plate 8 and the plate. Together with the compression mechanism 9, it is separated from the apparatus main body. Then, the operator discards the plate 3 in the plate discharge box 7 and returns the empty plate discharge box 7 to the inside of the apparatus main body, whereby the plate discharge operation is restarted.

However, in the plate discharge unit of this embodiment, the rack 9 as the compression mechanism 9 is provided above the plate discharge box 7.
Since it is necessary to secure a space for moving c up and down, there is a problem that the volume occupied by the plate discharge box 7 becomes smaller accordingly.

The plate discharge unit shown in FIG. 13 is an example in which the problems of the above-described embodiments are eliminated, and the plate 3 accommodated in the plate discharge box 7 is compressed in the upper portion inside the plate discharge box 7 of this embodiment. The compression plate 8 and the links 9d and 9e as the compression mechanism 9 are integrally arranged to form a four-bar parallel link. The link 9d as the compression mechanism 9 in this embodiment rotates the rotary plate 10r as the drive means 10 driven by a motor (not shown) in a state where the plate discharge box 7 is mounted in the main body of the stencil printing machine 1. The drive of the drive means 10 is transmitted to the compression plate 8 by being swung by the lever 10c that reciprocates in conjunction with each other. As a result, in FIG. 13, when the conveyance of the plate 3 into the plate discharge box 7 is completed, the lever 10c is moved upward and the link 9
The compression plate 8 is translated downward via the d and 9e (compression mechanism 9). The plate 3 is compressed and accommodated in the plate discharge box 7 by the movement of the compression plate 8. After that, link 9d,
The lever 10c is moved in the opposite direction until the compression plate 8 is returned to its original position via the 9e, and the next plate is waited for being conveyed into the plate discharge box 7.

When the amount of the plate 3 accommodated in the plate discharge box 7 becomes full by repeating the above-described operation, a full sensor (not shown) is activated to notify the operator to that effect. In response to this, when the operator pulls out the plate discharge box 7 toward the front side of the apparatus main body, the lever 10c as the driving means 10 and the link 9d as the compression mechanism 9 are disengaged, and the plate discharge box 7 is compressed by the compression plate 8 and Together with the compression mechanism 9, it is separated from the apparatus main body. Then, the operator discards the plate 3 in the plate discharge box 7 and returns the empty plate discharge box 7 to the inside of the apparatus main body, whereby the plate discharge operation is restarted.

In the plate discharge unit of this embodiment, the plate discharge box 7
Although the space occupied by the compression mechanism 9 above can be reduced, if the compression stroke of the compression plate 8 (the amount of vertical displacement of the compression plate 8) is increased, the length of the plate discharge box 7 in the plate discharge direction becomes large and the unit size becomes large. Induce. Also, the compression plate 8
Since it cannot be made too large, there is a problem that the compression efficiency is also reduced.

FIG. 1 to FIG. 8 show an embodiment of a plate discharge unit which solves the problems of the above embodiments. In FIG.
A compression plate 8 for compressing the plate 3 accommodated in the plate discharge box 7 is provided at an upper portion inside the plate discharge box 7 of the plate discharge unit 6.
The compression links 9f and 9g as the compression mechanism 9 are integrally arranged.

Compression links 9f and 9g in this embodiment
As shown in FIG. 1, they are arranged in pairs so as to support the front side and the back side of the compression plate 8. The lower ends of the pair of compression links 9f are pivotally supported on the upstream side of the compression plate 8 (on the side of the opening 7a of the plate discharge box 7), and the upper ends of the pair of compression links 9f pass through the slits 7b provided on the upper surface of the plate discharge box 7. Movable shafts 9h that extend above the plate discharge box 7 and are in sliding contact with the upper surface of the plate discharge box 7 are planted at the extending portions at the upper ends thereof.

On the other hand, as shown in FIG. 2, the lower ends of the pair of compression links 9g are slidably fitted in the elongated holes 8a provided on the downstream side of the compression plate 8, and the upper ends of the compression links 9g are respectively compressed. Similar to 9f, it extends above the plate discharge box 7 through the slit 7b, and the extending portion of this upper end is rotatably supported by a fixed shaft 9i and a bearing 9j.

The compression link 9f as the compression mechanism 9,
9 g is the stencil printer 1 main body of the stencil printing machine 1
With the plate discharge box 7 mounted therein, the movable shafts 9h at the upper ends of the compression links 9f engage with the fork portions 10f of the pair of drive racks 10e as the drive means 10 driven by the drive motor 10d. The movement of the drive rack 10e displaces the movable shaft 9h to the upstream side, thereby transmitting the drive of the drive means 10 to the compression plate 8.

That is, as shown in FIG. 1, each drive rack 10e is provided with a slot 10h in the abdomen of the drive rack 10e by means of a stepped pin 10i screwed to a side plate (not shown) of the apparatus main body so that the plate 3 is discharged in the discharging direction. Are rotatably supported along the respective shafts, and the forward and reverse rotation drive of the drive motor 10d is fixed to the worm 10j, the worm wheel 10k meshing with the worm 10j, and the worm wheel 10k coaxially integrated. By being transmitted to the drive pinion 10p that meshes with the drive rack 10e, they are reciprocated.

At the home position of each drive rack 10e, the fork portion 10f displaces the movable shaft 9h at the upper end of each compression link 9f to the most downstream side as shown in FIG. Is set to a position for raising the compression plate 8 to the uppermost position of the drive racks 10e and the fork portions 10f of the drive racks 10e and the compression links 9f of the drive racks 10e are in the home position. Engagement with the movable shaft 9h at the upper end, that is, attachment / detachment operation of the plate discharge box 7 with respect to the plate discharge box storage portion 1a of the apparatus body is performed.

As a result, in FIG. 2, when the transport of the plate 3 into the plate discharge box 7 through the opening 7a is completed, the drive racks 10e are moved forward, and the compression links 9f and 9g (compression mechanism 9) are used. , The compression plate 8 is moved downward substantially in parallel. The plate 3 is compressed and accommodated in the plate discharge box 7 as shown in FIG. 3 by the lowering of the compression plate 8. After that, each drive rack 10e is moved back through the compression links 9f and 9g until the compression plate 8 is returned to its original position.
The home position is waited until the next plate 3 is conveyed into the plate discharge box 7.

When the above-described operation is repeated and the plate 3 stored in the plate discharge box 7 becomes full, a full sensor (not shown) is activated to notify the operator of the fact. In response to this, when the operator pulls out the plate discharge box 7 to the front side of the apparatus main body, as shown in FIG. 1, the forks 10f of the drive racks 10e as the drive means 10 and the upper ends of the links 9f as the compression mechanism 9 are provided. Is disengaged from the movable shaft 9h, and the plate discharge box 7 is separated from the apparatus main body together with the compression plate 8 and its compression mechanism 9. Then, the operator discards the plate 3 in the plate discharge box 7 and returns the empty plate discharge box 7 to the inside of the apparatus main body, whereby the plate discharge operation is restarted. The plate 3 is discarded through a discarding port provided on the back side of the plate discharge box 7. The waste port of the plate discharge box 7 is
It is plain and closed by a lid (not shown) that is openable / closable or detachably arranged. As a result, the plate discharge box 7 is in a hermetically sealed state, so that when the plate discharge box 7 is taken out of the apparatus main body, the problem that the plate 3 accommodated from the discard port is accidentally dropped is solved.

By the way, in the plate discharge unit of this embodiment,
Since the compression plate 8 and the compression mechanism 9 thereof are built in the plate discharge box 7 side, the compression mechanism 9 and its driving means 10 are disengaged when the plate discharge box 7 is attached or detached as described above. Therefore, when the plate discharge box 7 is detached from the apparatus main body, the movable shaft 9h at the upper end of the compression link 9f as the compression mechanism 9 and each drive rack 10e as the drive unit 10 are provided.
The relative position with respect to the fork portion 10f must always be matched.

As a method for satisfying this condition, for example,
A coil spring is provided between the plate discharge box 7 and the compression plate 8 to give the compression plate 8 a rising habit, and the upper limit position of the compression plate 8 (that is, the movable shaft 9h is fixed by the stopper pin implanted in the plate discharge box 7). It can be achieved by restricting the position).
However, in this method, since the coil spring expands and contracts each time the compression plate 8 moves up and down, its elasticity may change over time, and the relative movement between the movable shaft 9h and the fork portion 10f of each drive rack 10e. There is a high possibility that the position will shift.

Therefore, in this embodiment, as shown in FIGS. 4 to 8, a stopper mechanism 11 for locking the compression plate 8 at the non-compression position when the plate discharge box 7 is taken out from the apparatus main body is provided. . Further, in the stopper mechanism 11 of the present embodiment, when the operator grips the handle 12 provided on the plate discharge box 7 to perform the attachment / detachment operation of the plate discharge box 7, the locking claw 11a is disengaged from the compression plate 8 ( It is configured to turn on / off).

1 to 5, the handle 12 is rotatably supported by a bracket 7c provided on the front side of the plate discharge box 7. An engaging / disengaging lever 11b is integrated with the handle 12 between the handle 12 and the front surface of the plate discharge box 7,
It is supported by the bracket 7c. In addition, the engagement / disengagement step portion 11c is provided on the downstream side of the engagement / disengagement lever 11b on the downstream side.
As shown in FIG. 4, the engagement / disengagement step portion 11c is formed with the engagement / disengagement portion of the lock release arm 11d in a state where the stencil sheet discharge box 7 is stored in the stencil sheet storage box storage portion 1a. 11e is engaged.

On the other hand, on the upper side of the upstream side of the engagement / disengagement lever 11b, as shown in FIGS. 1 to 7, a locking claw rotating arm 11f formed in a U-shape is connected to the engagement / disengagement lever 11b. It is fixed together. Locking claw rotating pins 11g are planted at the upper and lower arm ends of the locking claw rotating arm 11f, respectively.
Also, as shown in FIG. 7, they are fitted to the cam surfaces of the locking claw rotating cams 11h, respectively. This locking claw rotating cam 11h
Is fixed to the front end of a locking claw rotating shaft 11i that is laid across the opening 7a at the upstream side of the stencil box 7. The locking claw rotating shaft 11i extends in the longitudinal direction. A locking claw 11a is fixed at a substantially intermediate position. This locking claw 11a
As shown in FIGS. 3 and 4, when the plate discharge box 7 is stored in the plate discharge box storage portion 1a, the arm 11j provided on the locking claw rotating cam 11h and the front face of the plate discharge box 7 are. By the elastic force of the coil spring 11k suspended between the protrusion 7d provided on the upper portion, the locking claw rotating shaft 1 in FIG.
By imparting the counterclockwise habit of turning to 1i, the posture of the compression plate 8 is held in a position retracted from the ascending / descending path.

In the stopper mechanism 11 in this embodiment, when the handle 12 is pulled toward the front side of the apparatus (right side in FIG. 4) in order to pull out the plate discharge box 7 from the plate discharge box storage portion 1a in FIG. Together with the engagement / disengagement lever 11b, the spindle 1
It swings clockwise around 2a, and as shown in FIG. 5, the engagement / disengagement step portion 11c and the engagement / disengagement portion 11e of the lock release arm 11d are disengaged. When the engagement / disengagement step portion 11c of the engagement / disengagement lever 11b and the engagement / disengagement portion 11e of the lock release arm 11d are disengaged from each other, as shown in FIG. The lock release arm 11d is supported by the support shaft 11r by the elastic force of the engaged and disengaged spring 11p.
Is rotated clockwise around the lock lever 11b is locked at a position inclined toward the front side, and a lock release pin 1b is planted on the side plate of the plate discharge box storage section 1a on the apparatus body side. The engagement with the engagement / disengagement recess 11s formed in the lower part of the unlocking arm 11d is released.

On the other hand, in FIG. 4, when the handle 12 is pulled toward the front side of the apparatus (right side in FIG. 4), as shown in FIG.
When it is swung clockwise about 2a, the locking claw rotating arm 11f fixed to the engaging / disengaging lever 11b is displaced toward the front side of the apparatus body. This locking claw rotating arm 11
The displacement of f is the displacement of the contact position between the cam surface of the locking claw rotating cam 11h and the locking claw rotating pin 11g in FIG.
The locking claw rotating cam 11h is converted into rotation, and the locking claw rotating cam 11h is rotated clockwise in FIG.

As a result, the locking claw rotating shaft 11i substantially integrated with the locking claw rotating cam 11h is rotated clockwise, and the locking claw 11a fixed to the locking claw rotating shaft 11i.
However, as shown by the chain line in FIG. 8, in a state of being wrapped around the lower part of the compression plate 8, as shown in FIG. 5, the engagement / disengagement lever 11b is locked at the position inclined toward the front side, and The compression plate 8 is locked at the upper limit position (non-compression position) where the relative position of the movable shaft 9h at the upper end of the compression link 9f and the fork portion 10f of each drive rack 10e as the drive means 10 coincides.

According to this stopper mechanism 11, the compression plate 8
Since a spring or the like whose operation is uncertain is not directly used as the locking means (holding means) of the above, the movable shaft at the upper end of the compression link 9f as the compression mechanism 9 in the state where the plate discharge box 7 is taken out from the apparatus main body. The compression plate 8 can be locked at a position where the relative position between 9h and the fork portion 10f of each drive rack 10e as the drive means 10 is always matched.

Further, in this stopper mechanism 11, the locking release mechanism described below interlocks with the operation of storing the plate discharge box 7 in the apparatus main body and retracts the locking claw 11a from the locking position of the compression plate 8 ( The lock can be released). That is, as shown in FIG. 5, when the plate discharge box 7 stored in the plate discharge box storage portion 1a of the apparatus body is further pushed to the storage completion position shown in FIG. 4, the plate discharge box 7 is interlocked with the movement operation of the plate discharge box 7. The hanging piece 11u of the lock releasing arm 11d as the lock releasing mechanism collides with the lock releasing pin 1b on the apparatus body side. As a result, the unlocking arm 11d is rotated counterclockwise against the elastic force of the engaging / disengaging spring 11p, and the unlocking arm 1d is attached to the engaging / disengaging step portion 11c of the engaging / disengaging lever 11b.
The engagement / disengagement portion 11e of 1d is engaged, and substantially at the same time, the engagement / disengagement recess 11s at the lower portion of the engagement release arm 11d is engaged with the engagement release pin 1b.

Further, by rotating the lock release arm 11d in the counterclockwise direction, the engagement / disengagement lever 11b (and the handle 1) is released.
The lock of 2) is released, and the engagement / disengagement lever 11b (and the handle 12) is returned to the original position shown in FIG. 4 by the elastic force of the coil spring 11k, and the locking claw rotating cam 11h.
Is returned to the original position shown in FIG.
1i rotates counterclockwise in FIG. 7 and, as shown by the solid line in FIG. 8, the locking claw 1 fixed to the locking claw rotation shaft 11i.
1a is retracted from the locking position of the compression plate 8 to the outside of the lifting path.

The stopper mechanism 11 has a handle 1
2 is interlocked with the operation of the locking plate 11a to the compression plate 8
The engaging claw 11a is disengaged with respect to the compression plate 8 by operating the engaging / disengaging lever 11b independently, regardless of the operation of the handle 12. You may. With this configuration, even when the handle 12 is accidentally pulled during the lifting / lowering operation of the compression plate 8, the locking claw 11a does not project into the lifting / lowering path of the compression plate 8, and thus the compression plate 8 It is possible to avoid an unintended collision between the locking claw 11a and the locking claw 11a.

As described above, in the plate discharge unit of this embodiment, the compression mechanism 9 of the compression plate 8 can be constituted by the link mechanism with one point fixed, so that a stable locus of the compression pressure of the compression plate 8 can be drawn.

Further, in the plate discharge unit of this embodiment, since the compression mechanism 9 composed of the link mechanism is arranged on both sides of the compression plate 8, the plate discharge box 7 is placed in the plate discharge box storage section 1a of the apparatus main body.
The compression mechanism 9 consisting of this link mechanism when the
Does not take up much space, and the space occupied by the compression mechanism 9 does not significantly reduce the volume of the plate 3 accommodated in the plate discharge box 7.

Further, in the plate discharge unit of this embodiment, since the link mechanism is used as the compression mechanism 9, the maximum compression force can be generated at the lower fulcrum of the compression links 9f, 9g, and the plate by the compression plate 8 can be generated. 3 is advantageous for compression.

Further, in the plate discharging unit of this embodiment,
When the stencil box 7 is taken out from the stencil box storage section 1a of the apparatus main body, the stopper mechanism 11 operates in conjunction with the handle 12 (or the engagement / disengagement lever 11b) to prevent the compression plate 8 from falling due to its own weight. Since the compression plate 8 is always located above the plate discharge box 7, the plate 3 compressed and stored in the plate discharge box 7 can be easily discarded.

By the way, in the compression mechanism 9 of the embodiment shown in FIGS. 1 to 3, the compression force urged from the driving means 10 of the movable shaft 9h of the one compression link 9f causes the other through the compression plate 8. Since the compression link 9g is transmitted to the compression plate 9g, the transmission efficiency of the compression force of the compression link 9g to the compression plate 8 tends to be lower than the transmission efficiency of the compression force of the one compression link 9f to the compression plate 8. .

In order to make up for this drawback, therefore, in the embodiment shown in FIGS. 9 and 10, it is possible to rotate with respect to the compression link 9f with the fulcrum 13 where the compression link 9f and the compression link 9g intersect as the center of rotation. The first gear 14 is fixedly disposed integrally with the compression link 9g so that the first gear 14 does not rotate with respect to the compression link 9g.
The second gear 15 meshing with the gear 14 of the
The second gear 15 is integrally fixed to the compression link 9f so as not to rotate with respect to f.

In the compression mechanism 9 of this embodiment, the movable shaft 9h of the compression link 9f receives a driving force from the drive means 10, and in FIG. 9, one compression link 9f rotates clockwise with the movable shaft 9h as a movable fulcrum. Then, this compression link 9f
Is transmitted to the first gear 14 that meshes with the second gear 15 through the second gear 15, so that the rotation of the first gear 14 causes the same displacement amount as the rotation amount of the compression link 9f on the other hand. The compression link 9g is rotated counterclockwise.

Therefore, according to the compression mechanism 9 of this embodiment, both of the compression links 9f and 9g transmit substantially equal compression forces to the compression plate 8 and push down the compression plate 8, so that each compression link 9f. , 9g, the transmission efficiency of the compression force to the compression plate 8 is substantially equalized, and the transmission efficiency of the compression force of the compression link 9g to the compression plate 8 is improved.

[0050]

As described above, according to the present invention, the compression plate and the compression mechanism thereof are built in the plate discharge box, and the plate discharge box can be taken out from the apparatus main body together with the compression plate and the compression mechanism thereof. The occupied space other than the stencil box can be reduced, and the device can be downsized. further,
By incorporating a compression plate and its compression mechanism into the stencil box, it is possible to take out the stencil box while keeping a larger amount of the stencil in the box, so you can operate the stencil without removing it from the outside. It is possible to prevent the operator's hands and clothes from being damaged when the plate is discarded.

Further, drive means of a compression mechanism for raising and lowering the compression plate is installed on the apparatus body side, and when the plate discharge box is housed in the apparatus body, the drive force of the drive means can be transmitted to the compression mechanism. By connecting it to the drive mechanism of the compression mechanism, it is possible to install it on the upper part of the stencil box, and the compression box can be taken out in the front direction with respect to the apparatus body. .

Further, when the stencil box is taken out from the apparatus main body, when the plate in the stencil box taken out from the apparatus main body is discarded by locking the compression plate at the non-compressed position in the stencil box by the stopper mechanism. Since the compression plate does not move, the plate can be easily discarded.

Further, the stopper mechanism is provided with a lock release mechanism for releasing the lock with respect to the compression plate when the plate discharge box is housed in the apparatus body. The drive means does not drive the compression plate and its compression mechanism in the state of being locked at the compression position, and damage to the drive system and the stopper mechanism can be avoided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an overall configuration of a plate discharge unit according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a compression plate and a compression mechanism of the plate discharge unit in the above embodiment.

FIG. 3 is a cross-sectional view showing an operation mode of a compression plate and a compression mechanism in the above embodiment.

FIG. 4 is a partial side view showing the configuration of the handle portion of the stopper mechanism of the compression plate of the plate discharge unit in the above embodiment.

FIG. 5 is a partial side view showing an operation mode of the handle portion of the stopper mechanism of the compression plate of the plate discharge unit in the above embodiment.

FIG. 6 is a partial plan view showing a configuration of a cam portion of a stopper mechanism of a compression plate of the plate discharge unit in the above embodiment.

FIG. 7 is a partial front view showing the configuration of the cam portion of the stopper mechanism of the compression plate of the plate discharge unit in the above embodiment.

FIG. 8 is a partial front view showing the configuration of the locking claw portion of the stopper mechanism of the compression plate of the plate discharge unit in the above embodiment.

FIG. 9 is a schematic front view showing the configuration of a compression mechanism of a compression plate according to another embodiment of the present invention.

FIG. 10 is a schematic front view showing an operation mode of the compression mechanism of the compression plate according to another embodiment of the present invention.

FIG. 11 is a cross-sectional view of an essential part showing a schematic configuration of a plate discharge unit embodying the present invention.

FIG. 12 is a cross-sectional view of an essential part showing another schematic configuration of a plate discharge unit embodying the present invention.

FIG. 13 is a cross-sectional view of a main part showing still another schematic configuration of a plate discharge unit embodying the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stencil printer 1a Stencil box storage 3 Used plate 6 Scrap unit 7 Scrap box 8 Compression plate 9 Compression mechanism 9f, 9g Compression link 10 Driving means 10e Driving rack 11 Stopper mechanism 11a Locking claw 12 Handle

Claims (6)

[Claims] 1. A compression plate and a compression mechanism for compressing the plate accommodated in the plate discharge box are integrated in a plate discharge box of a plate discharge unit which stores a used plate used in a printing apparatus. A stencil sheet discharging unit, wherein the stencil sheet discharging box can be taken out together with the compression plate and its compression mechanism from the apparatus main body by storing the stencil sheet. 2. A drive means of the compression mechanism for raising and lowering the compression plate is installed on the apparatus body side, and when the plate discharge box is housed in the apparatus body, the drive force of the drive means is compressed. The plate discharge unit according to claim 1, wherein the plate discharge unit is communicatively coupled to the mechanism. 3. The plate discharge plate according to claim 1, further comprising a stopper mechanism for locking the compression plate at a non-compressed position when the plate discharge box is taken out from the apparatus main body. unit. 4. The plate discharge plate according to claim 3, wherein the stopper mechanism has a lock release mechanism that releases a lock with respect to the compression plate when the plate discharge box is housed in the apparatus body. unit. 5. The compression mechanism for raising and lowering the compression plate is provided on the front side and the rear side of the compression plate so as to be rotatably intersected with each other. The plate discharge unit according to claim 1 or 2, wherein the plate discharge unit comprises a pair of link mechanisms configured by a set of compression links. 6. Two compression mechanisms for raising and lowering the compression plate are provided so as to rotatably intersect with each other on both front and rear sides of the compression plate. It consists of a pair of link mechanisms consisting of a set of compression links,
And, with the fulcrum where each compression link intersects as the center of rotation,
A first gear rotatable with respect to one of the first compression links is fixedly disposed on the other second compression link side, and a second gear meshing with the first gear is The plate discharge unit according to claim 1 or 2, wherein the plate discharge unit is fixedly provided on the side of the first compression link.