JPH0226584B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a printing plate for transferring extremely thin and flat printing plates made of metal such as aluminum to a conveyor that circulates between the plate making shop and a rotary press in a plate making shop. The purpose of the plate loading device is to improve loading efficiency and performance.

The background and gist of the invention will become clearer in the following description of preferred embodiments of the invention.

In Fig. 1, 1 is a plurality of plate making machines installed in a plate making factory, and 2, 2 are printing plates installed corresponding to each of two types of rotary presses 3, 3 installed in a rotary press. Stockers 4, 4 are two chain conveyors, X
is the printing plate a after plate making sent out from plate making factory 1
This is a printing plate loading device for transferring printing plates toward a chain conveyor 4, and the present invention is directed to this printing plate loading device
This is related to. In the case of this embodiment, plate loading devices X and X are respectively provided for the two chain conveyors 4 and 4 as shown in FIGS. 2 and 3. For this reason, the action of receiving the printing plate a sent out by the horizontal conveyor 5 from the plate-making machine 1, placing it in a horizontal position, and rotating it 90 degrees in one direction from the receiving position and rotating it 90 degrees in the other direction is performed. A turntable A having a turntable A is provided at a lower position between a pair of printing plate loading devices X, X. The reason is as follows.
That is, although printing plate a has folded edges on both sides,
The two are distinguished from each other, and only one folded edge b is used for locked conveyance. When the paper is fed by the horizontal conveyor 5, the folded edge b is parallel to the feeding direction. Therefore, this folded edge b is transferred to the lifting device B.
One plate loading device X is locked by the locking bar 6 of
In order to transfer to the plate loading device X on the opposite side, it is necessary to rotate table A 90 degrees, and in order to transfer it to the plate loading device X on the opposite side, it is necessary to rotate table A 90 degrees in the opposite direction. That's true.

The above-mentioned lifting device B is also used as a pair of opposing plate loading devices X, X. That is, the lifting device B includes a pair of vertically rotating chains 7, 7 installed on both sides of the turntable A, and these chains 7, 7.
A bar 6 is provided which is suspended horizontally between the pairs and locks the folding edge b of the printing plate. Each chain 7 is constructed with a left-right symmetrical rotation path so that it can be used also as a pair of printing plate loading devices X, It is designed to receive force. The locking bars 6 are horizontally suspended at two locations that equally divide the entire length of the chain 7 into two. Chains 7 and 7 pairs are located near the upper end of the rotation path.
Once the lowering parts 10, 10 are provided.

The pair of plate loading devices X, X facing each other are composed of a group of independent devices, except that they also serve as the lifting device B. Since they are symmetrical to each other, the structure of the plate loading device X is as follows. , only one of them will be explained.

As shown in FIG. 4, the printing plate loading device There is.

The receiving device C receives the lower edge of the printing plate a when the locking bar 6 passes through the descending portion 10 formed near the upper end of the rotation path of the pair of chains 7, 7. A stopper 12 for disengaging the plate a from the locking bar 6, and a back support plate 13 for the detachable plate a, and the stopper 12 is configured to be reversibly switched to a position in which the plate a is released. , the canopy plate 13 has a stopper 12 at its upper edge.
It is configured to receive and lock the folded edge b of the sliding printing plate a after being released. 14 is stopper 1
It is a cylinder for two rotations.

This receiving device C is equipped with an air injection nozzle 15 for pressing and moving the printing plate a released from the locking bar 6 toward the support plate 13.

The transfer device D includes a mechanism d 1 for reversibly switching the support plate 13 so that its extended plate surface passes through the gripping action position of the gripper 11, and a mechanism d ₁ for reversibly switching the support plate 13 so that the extension surface of the support plate passes through the gripping action position of the gripper 11; A mechanism _d2 for pushing up the printing plate a on the gripper 11 towards the gripping action position of the gripper 11 is provided. The posture switching mechanism
d ₁ has a cylinder 17 that rotates the lower end of the canopy plate 13 around a horizontal axis 16 . The thrusting mechanism d ₂
A protruding plate 18 that is substantially flush with the canopy plate 13 and a cylinder 19 for moving this up and down along the canopy plate 13.
have.

The receiving device C is equipped with a printing plate a presence detector 20, and the lifting device B is equipped with a transfer printing plate a passage detector 21 at a midway position on its ascending path, and both of these detectors 20 and 21 detect It is equipped with a control mechanism (not shown) that automatically stops driving the lifting device B only when it is activated.

The turntable A has a phototube 22 that detects the transfer of the printing plate a, and solenoids 25 and 26 that push up the front and rear stoppers 23 and 24 upon this detection. 27 is a forward/reverse drive motor.

The gripper 11 of the chain conveyor 4 opens to a position in which it can grip the folded edge b of the printing plate by lifting the base roller 29 onto the opening/closing cam 28 provided at the loading position in the path of the chain conveyor 4, and then the cam continues. It has a claw 30 that closes with a spring and grips the folded edge b when it is separated from 28. The cam 28 is configured to be switchable between a position where the cylinder 31 acts on the roller 29 and a position away from the roller 29. A phototube-based detector 32 is provided at the top of the loading position to determine whether the gripper 11 has already gripped the printing plate a;
A cylinder 31 is used as a detector to detect that the user is grasping the object, and the cam 28 is operated to retract.When it is detected that the user is not holding the object, the cylinder 31 is operated to cause the cam 28 to protrude. There is.

Next, the operation will be sequentially explained according to FIG.

(1) When the printing plate a is fed onto the turntable A by the horizontal conveyor 5 and blocks the phototube 22, the front stopper 23 first protrudes, then the rear stopper 24 protrudes, and then the turntable A is set in advance. It rotates 90 degrees in the direction it is facing and stops [Figure 5 A to C].

(2) Immediately after the turntable A starts rotating (before it stops), the lifting motor 8, which had previously stopped the locking bars 6, 6 at the lowest and highest points, is driven, and the turntable Immediately before A stops, the locking bar 6 comes directly below the printing plate a and rises while locking the folded edge b, so the printing plate a is transferred from a horizontal position to a vertical position and then moved upward. [Figure 5 D and H]. The bar 6 temporarily holds the printing plate a while passing through the lowering part 10, and the plate 13,
It is transferred onto the stopper 12, and the motor 8 is stopped when it reaches the uppermost point. After the turntable A stops and until the lifting motor stops, the front and rear stoppers 23 and 24 of the table A are retired, and then the turntable A returns to its original position in the reverse direction. Air is injected from the nozzle 15 toward the printing plate a before and after the transfer of the printing plate a to the printing plate A (FIG. 5).

(3) The cylinder 14 operates and the stopper 12, which receives the printing plate a on the support plate 13, opens, and the printing plate a is opened.
slides down the backing plate 13, and the folded edge b is received on the upper edge of the backing plate 13. The cylinder 17 is then actuated to tilt the canopy plate 13. In this posture, it is waiting for the gripper 11 to come (Fig. 5, G and C).

(4) When the empty gripper 11 approaches, the detector 32 detects that it is empty and operates the cylinder 31 to cause the cam 28 to protrude. The pushing-up cylinder 19 is operated in synchronization with the operation of the cylinder 31, and the pushing-up plate 18 pushes up the printing plate a to the gripper 11 clamping action position and stops, and the printing plate a waits for the gripper 11 to pass. Immediately after, the roller 29 rides on the cam 28, opening the pawl 30, and then closing the pawl 30 to grasp the folded edge b of the printing plate a. During this time, the chain conveyor 4 continues to move at a constant speed. That is, the gripper 11 grabs the printing plate a while running (FIG. 5).

(5) The canopy plate 13 is raised by the cylinder 17, the raised plate 18 is lowered by the cylinder 19, the stopper 12 is closed by the cylinder 14, and the cam 28 is retracted by the cylinder 31.

In the process of step 4, the passing gripper 11 has already touched the printing plate a.
, the printing plate a is supported on the support plate 13 and stands by until the next empty gripper 11 picks up the plate. Even during this waiting period, the bar 6 is allowed to transport the next printing plate a. Only when the detector 20 on the side of the support plate 13 detects the presence of the printing plate a when the lifting printing plate a passes the detector 21, the lifting motor 8 is stopped midway at that point. Ru. When the seat is transferred to the gripper 11 and becomes an unoccupied seat, the motor 8 is driven again.

In the above example, there are two chain conveyors 4 and 4.
However, the present invention also includes a case where there is only one chain conveyor 4. Further, the present invention also includes a case where there is only one plate making machine 1.

Since the present invention has the above configuration, it has the following advantages.

The printing plate loading device of the present invention includes a lifting device that locks a printing plate positioned in a horizontal position and converts the printing plate into a vertical position by upward movement; Equipped with a receiving device that automatically detaches from the feeding device and receives the plate, and a transfer device that transfers the received printing plate toward the gripper of the chain conveyor, it is possible to receive the printing plate in a horizontal position as well as in a vertical position. Because the entire loading device is divided into a lifting device, a receiving device, and a transfer device, even when the gripper of the conveyor does not arrive or the gripper passing through is not empty, Even in a state where the receiving device is forced to leave a printing plate present, it can be configured to lift the next printing plate up to the middle of the lifting process, and during this period, the transfer from the receiving device to the gripper can be carried out. If carried out, it is also possible to carry out continuous feeding without interrupting the lifting.

As described above, according to the present invention, it has been possible to provide a printing plate loading device that has excellent overall loading efficiency and loading performance.

The printing plate loading device of the present invention has a receiving device and a transfer device respectively disposed near the upper end of the lifting device, and the lifting device vertically lifts the printing plate in a vertical position and tilts it to the receiving device. The printing plate on the receiving device is transferred diagonally upward by the transfer device in an inclined posture and then transferred to the gripper of the chain conveyor, so the installation space of the loading device itself is extremely small. .

The lifting device of the printing plate loading device of the present invention has a structure in which a plurality of locking bars are installed horizontally at regular intervals between the vertical chains, and the printing plate is locked and lifted by the locking bars. Therefore, when the printing plates on the turntable are lifted and delivered one after another to the receiving device, it is only necessary to move the locking bar from the lower limit position to the upper limit position, and the movement stroke of the locking bar is short.
It will be more efficient.

The lifting device of the printing plate loading device of the present invention is composed of a vertically rotating chain and a locking bar horizontally suspended between the chains, so that the structure is relatively simple.

The receiving device of the printing plate loading device of the present invention is equipped with an air injection nozzle that presses and moves the printing plate released from the locking bar toward the support plate, so that the printing plate released from the locking bar is moved. can be reliably and efficiently transferred onto the support plate of the receiving device.

The printing plate loading device of the present invention has a structure in which the vertical chains of the lifting device are installed on both sides of the turntable that changes the direction of the printing plate, so that they have symmetrical rotation paths. A receiving device and a transfer device can be installed on both sides of the upper end of the chain, and in this case, one lifting device can handle two
Printing plates can be loaded onto the system's chain conveyor, and printing plates can be loaded with high efficiency.

[Brief explanation of drawings]

The drawings illustrate embodiments of the printing plate loading device according to the present invention, and FIG. 1 is a schematic plan view showing a plate making factory and a rotary press, FIG. 2 is a schematic side view of the device of the present invention, and FIG.
The figure is a front view of the same, FIG. 4 is an enlarged side view of the main part, and FIGS. a...Printing plate, b...Folding edge, B...Lifting device, C...Receiving device, D...Transfer device, _d1 ...Switching mechanism, _d2 ...Uplifting mechanism, 4... Conveyor, 6...
...Locking bar, 7...Chain, 10...Descent section, 11...Gripper, 12...Stopper, 13
...Shoulder plate, 15...Nozzle, 20...Presence detector, 21...Passage detector.

Claims (1)

[Claims] 1. A printing plate a sent out from a plate-making machine 1 is received, placed in a horizontal position so that one folded edge b protrudes to the side, and its orientation is changed to a predetermined direction. A turntable A to be obtained; vertically rotating chains 7 installed on both sides of the turntable A so as to have symmetrical rotation paths, and horizontally suspended between the chains 7 at regular intervals; a lifting device B comprising a locking bar 6 that locks one folded edge b of the printing plate a and converts the printing plate a into a vertical position; a chain 7;
A stopper 12 is disposed on both sides or one side of the upper end of the rotation path of the chain 7 and automatically releases the printing plate a from the locking bar 6 when the locking bar 6 descends near the upper end of the chain 7. a receiving device c comprising a support plate 13 that receives the plate a in an inclined position; and an air injection nozzle 15 that presses and moves the detached printing plate a toward the support plate 13; a chain 7;
A transfer device D is disposed on both sides or one side of the upper end of the rotation path of and transfers the printing plate a on the support plate 13 obliquely upward in an inclined posture and transfers it toward the gripper 11 of the chain conveyor 4. A printing plate loading device characterized by comprising: 2. A switching mechanism d ₁ in which the transfer device D reversibly switches the support plate 13 toward an inclined posture in which an extended surface of the support plate passes through the gripping action position of the gripper 11; Plate a on the canopy plate 13
2. The plate loading device according to claim 1, further comprising a thrusting mechanism _d2 for pushing up the gripper 11 toward the gripping action position. 3. The receiving device C is equipped with a printing plate a presence detector 20, and the lifting device B is equipped with a transferred printing plate a passage detector 21 at a midway position on its ascending path, and both of these detectors 20 and 21 are The plate loading device according to claim 1, further comprising a control mechanism that automatically stops the driving of the lifting device B only when both of them are detected.