JP2008149730A - Counter ejector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a counter ejector remarkably shortening cycle time by shortening operating time. <P>SOLUTION: A back stop 26 for stopping a box 3 discharged from a folder gluer 1, an elevator 29 for receiving the box 3 striking the back stop 26 and falling, and a ledge 36 moving when a stack 50 accumulated and formed on the elevator 29 reaches a set number of sheets and receiving a box for forming the next stack, are provided. Auxiliary ledges 22a and 22b for receiving the stack 50 on the ledge 36 are provided on the lower part of the back stop 26. An upper part conveyor 44 for pinching these stacks is fitted to the size of the box and is constituted so that it is coupled with the back stop 26 and moves to a definite distance from the back stop 26. A blower 32 for blowing air on the upper face of the box 3 is provided above the elevator 29, to press the box 3 by air pressure of the blower 32. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a counter ejector for accumulating and counting cardboard boxes attached to a flexo folder gluer (box making machine).

  The flexo folder gluer of the corrugated board box making machine is equipped with a counter ejector that collects and counts the boxes boxed at the end of the box and discharges it in a predetermined number of batches. Various counter ejectors have been proposed so far, and FIG. 10 to FIG. 13 show an example, which is described in Japanese Patent Laid-Open No. 5-208774. The outline will be described below. In addition, a code | symbol and a name do not necessarily correspond with the thing of the said gazette.

(1) First, a process of forming a predetermined number of stacks will be described.
As shown in FIG. 10, a sheet is boxed at the end of the folder gluer 1, and the box 3 discharged from the folder gluer 1 through a pair of upper and lower delivery rolls 2 hits a front stopper 4 and is placed on the elevator 5. Drop and accumulate. When the box 3 falls onto the elevator 5 and is stacked to form the stack 6, the upper portion of the stack 6 is pressed by the rotating cam-like pressing member 12, thereby causing the box 3 to spring back (bounce back). ) To prevent. The elevator 5 is configured to descend as the number of accumulations thereon increases.
Next, as shown in FIG. 11, when the number of stacks 6 on the elevator 5 reaches a predetermined number (for example, 10), the ledge 7 waiting on the upper side is lowered to be between the tenth and eleventh sheets. enter. Thereafter, the boxes 3 discharged from the folder gluer 1 are accumulated on the ledge 7.
Similarly to the elevator 5, the ledge 7 descends according to the number of sheets accumulated on it. While the ledge 7 receives the box 3 discharged from the folder gluer 1, the elevator 5 descends to the discharge position of the lowest stack 6. Further, as shown by a chain line in FIG. 11, the stack 6 is sent out by the pusher 8 and pushed out until it is sandwiched between the conveyor 9 and the upper conveyor 13.
Then, as shown in FIG. 12, when the stack 6 is conveyed by the delivery conveyor 9 and separated from the elevator 5 as a batch 14, the elevator 5 receives the box 3 at the upper portion of the ledge 7 forming the stack 6 a. Ascend to height and receive stack 6a on behalf of ledge 7. When the ledge 7 delivers the stack 6a to the elevator 5, the ledge 7 moves backward, rises to a standby position, further advances and waits, and is provided for the next partition. The ledge 7 is provided with a press bar 10 for pressing the stack 6 on the elevator 5 while the elevator 5 is descending.

(2) Next, main dimensional relationships will be described.
Boxes of various sizes can be made in box making machines. Therefore, the length of the elevator 5 is formed larger than the maximum length of the box 3. The stopper 4 is disposed so as to be movable between positions corresponding to the smallest sheet from the largest sheet forming the box 3. Although the ledge 7 is not specified in the above publication, it is estimated that the bottom of the box 3 is supported over the entire length. This is because the stack 6 is pressed by the cam-like pressing member 12 provided immediately after the feeding roll 2, and therefore the stack 6 may fall down unless the cam-like pressing member 12 is supported directly below. . The delivery conveyor 9 and the upper conveyor 13 are fixed in position in the flow direction of the box 3 and are provided at positions corresponding to the maximum sheet length at the tip of the elevator 5. For this reason, as shown in FIG. 13, the stroke S of the pusher 8 becomes large especially in the case of the stack 6b of the short boxes 3.
Japanese Patent Laid-Open No. 5-208774

By the way, in recent years, the speed of machines has been increased, and it is required to execute the above-described process (1) at a higher cycle than in the past. From this point of view, the following problems are expected in the case of the above-described prior art.
(1) Since the stroke S of the pusher 8 is adjusted to the maximum sheet, the movement is wasted particularly when the box has a short size.
(2) Since the ledge 7 moves by the entire length of the box 3, it takes a lot of time to take in and out.
(3) Since the stroke of the elevator 5 is large, it takes much time to rise and fall.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a counter ejector capable of greatly shortening the cycle time by shortening the operation time.

  In order to solve the above-described problems of the prior art, in the present invention, in a counter ejector that is attached to a folder gluer and collects and counts the boxes that have been made in a batch and discharges them in batches, the folder gluer is discharged. A backstop for stopping a box, an elevator for receiving a box that has fallen on the backstop, and a box that is activated when a stack formed on the elevator reaches a set number and forms a next stack. An auxiliary ledge that receives the stack on the ledge at the lower part of the backstop, and at least an upper conveyor that sandwiches the stack is adjusted to a box size and is linked to the backstop and fixed from the backstop. It is configured to move to a distance, and air is applied to the upper surface of the box above the elevator. The blower attaching can provided, so that pressing the box by air pressure of the blower.

  As described above, the counter ejector according to the present invention is provided with the folder gluer, and collects and counts the boxes that have been made in a batch and discharges them in batches, and stops the boxes discharged from the folder gluer. A backstop to be received, an elevator for receiving a box that has fallen on the backstop, and a ledge for receiving a box that is activated when a stack formed on the elevator reaches a set number of sheets to form a next stack. An auxiliary ledge that receives the stack on the ledge is provided at a lower part of the backstop, and at least an upper conveyor that sandwiches the stack is adjusted to a box size and moved to a certain distance from the backstop in conjunction with the backstop. And a blower for blowing air on the upper surface of the box above the elevator. Since the at air pressure of A to hold the said box, the cycle time by shortening the operation time can be significantly shortened, thereby making it possible to improve productivity.

  Hereinafter, the present invention will be described in detail based on illustrated embodiments. Here, FIG. 1 is a block diagram for explaining the schematic arrangement of the main components of the counter ejector according to the embodiment of the present invention, FIGS. 2 to 7 are conceptual diagrams for explaining the operation of the counter ejector of the present embodiment, and FIG. Is an explanatory view of the operation timing of the ledge, and FIG. 9 is an explanatory view showing the cycle time of the counter ejector according to the embodiment of the present invention and the conventional counter ejector.

As shown in FIG. 1, a frame 20 is erected on both sides of the counter ejector 100 according to the present embodiment, and the frame 20 has an outlet portion (the rearmost portion) of the folder gluer 1 and a pair of upper and lower portions. A delivery roll 2 is attached. Below these feed rolls 2 are provided spankers 11 that press the end of a stack 50 to be described later. The spankers 11 are connected to a rotating lever 21 and reciprocate by the rotating lever 21. It is configured.
One auxiliary ledge 22 a provided separately from a ledge 36 described later is attached to the lower portion of the spanker 11 by an air cylinder 23 so as to be able to enter and exit. A pusher 24 that pushes out the stack 50 is provided below the auxiliary ledge 22a so that the air cylinder 25 can enter and exit.

  Further, a backstop 26 for stopping the box 3 discharged from the folder gluer 1 is supported at a position facing the front of the feed roll 2 so as to be movable in the front-rear direction, although not shown in detail. That is, the upper portion of the backstop 26 is attached to a screw shaft 28 extending in the front-rear direction, and is moved through the screw shaft 28 by the rotational drive of the motor 27. Another auxiliary ledge 22b is provided at the lower portion of the backstop 26 so as to be able to enter and exit by an air cylinder 23. Both auxiliary ledges 22a and 22b are arranged to face each other and receive a stack 50 on the ledge described later. It is configured as follows.

  Below the backstop 26 is provided an elevator 29 that receives and supports the box 3 that has fallen on the backstop 26 and collects and forms a stack 50. The elevator 29 is arranged almost horizontally in front of the delivery roll 2, is connected and supported by a lever 31 that forms a link mechanism with a shaft 30 interposed therebetween, and is vertically moved by a lever 31 that is driven by the shaft 30. It is comprised so that reciprocation is possible along. Moreover, a blower 32 that blows air A onto the upper surface of the box 3 is provided above the elevator 29. For this reason, the blower 32 is disposed at a position higher than the position of the box 3 delivered by the delivery roll 2.

  On the other hand, side frames 33 are provided on both sides of the counter ejector 100, and a pair of guide plates 34 are slidably attached to the side frames 33. A beam 35 is installed between the guide plates 34, and a ledge 36 is supported on the beam 35 by a motor 37 so as to be slidable in the vertical direction. The ledge 36 is provided to receive a box 3a that forms the next stack 50a by operating when the stack 50 formed on the elevator 29 reaches a set number. A press bar 38 that presses the stack 50 is supported on the directional member 36a by an air cylinder 39 so as to be movable up and down.

A discharge conveyor 40 is provided at the lower end of the elevator 29 at the same level as the upper surface of the elevator 29, and the outlet conveyor 41 is at the same level as the discharge conveyor 40 on the downstream side. In the position. The discharge conveyor 40 and the outlet conveyor 41 are supported by rails 42 extending in the front-rear direction and are driven by a motor 46. In addition, the entrance end position of the discharge conveyor 40 is installed deeply into the elevator 29 so as to be sufficiently close to the pusher 24 so that even the box 3 having the minimum length can be received.
Further, a frame 43 is guided to the outlet conveyor 41 so as to be slidable in the front-rear direction. An upper conveyor 44 that sandwiches the stack 50 in combination with the discharge conveyor 40 and the outlet conveyor 41 is supported by the frame 43 via a rack 45 so that the position in the height direction can be adjusted. That is, the upper conveyor 44 can move in the front-rear direction and the height direction, and is configured to move from the backstop 26 to a certain distance in conjunction with the backstop 26 in accordance with the box size.

A photoelectric tube (detecting means) 51 for detecting the passage of the sheet forming the box 3 is provided in the middle of the sheet traveling path of the folder gluer 1. As shown in FIG. 8, the phototube 51 is electrically connected to a control panel (control means) 52, and a detected sheet passage signal P is sent to the control panel 52.
In addition to the sheet passing signal P, information M of the machine speed v (rotational speed of the feed roll 2) at that time is sent to the control panel 52, and the control panel 52 reaches the back stop 26 from these information. A signal (decreasing signal) N for calculating the time and commanding the operation of the ledge 36 is sent to the motor 37 of the ledge driving device. That is, after receiving the sheet passing signal P, the control panel 52 issues a lowering signal N to the motor 37 with a time delay represented by ΔT = S / v. Here, S represents the distance from the phototube 51 to the backstop 26, and v represents the machine speed.

Next, the operation of the counter ejector 100 of this embodiment will be described with reference to FIGS.
FIG. 2 shows a state in the middle of stacking before the stack 50 on the elevator 29 reaches a predetermined number. In this state, the position of the backstop 26 is adjusted according to the length of the box 3. The box 3 discharged from the delivery roll 2 hits the backstop 26 and falls on the elevator 29. At this time, air A indicated by an arrow is blown from the blower 32 above the elevator 29 on the upper surface of the box 3 in order to promote the fall of the box 3 and press the spring back of the box 3.
The elevator 29 is controlled to descend as the height of the stack 50 on the elevator 29 increases. Further, while the stack 50 is stacked on the elevator 29, the end of the stack 50 is pressed by the spanker 11, and the position is corrected and aligned at a right angle. Furthermore, the ledge 36 and the press bar 38 stand by by protruding to about 2/3 of the length of the box 3 at a position higher than the box 3 discharged from the feed roll 2.

FIG. 3 shows the moment when the stack 50 on the elevator 29 reaches the set number. At the moment when the set number of boxes 3 reach the backstop 26, the ledge 36 and the press bar 38 built in the ledge 36 are lowered to receive the first box 3a forming the next stack 50a. The lowering command of the ledge 36 is, as described above, from the position of the phototube 51 based on the sheet passing signal P that the photocell 51 has reached the leading end of the last box 3 (for example, the 10th sheet) and the information M of the machine speed at that time. The time required to reach the backstop 26 is calculated and sent to the motor 37 (see FIG. 8).
FIG. 4 shows a state where the elevator 29 is lowered to the position of the discharge conveyor 40. In FIG. 3, when the ledge 36 receives the boxes 3a forming the stack 50a, the elevator 29 immediately starts to descend to the position of the discharge conveyor 40. At this time, the press bar 38 is pushed downward from the ledge 36 so as to prevent the stack 50 from collapsing due to the spring back, and descends while sandwiching the stack 50 together with the elevator 29. When the upper surface of the stack 50 passes through the positions of the auxiliary ledges 22a and 22b, the auxiliary ledges 22a and 22b are projected in a direction facing each other and are on standby. The next stack 50 a is formed on the ledge 36.
FIG. 5 shows the pusher 24 pushed out until the stack 50 is sandwiched between the upper conveyors 44. Thereafter, the stack 50 pushed out by the pusher 24 is sent to the outside as a batch 60 described later by the discharge conveyor 40 and the outlet conveyor 41.

As shown in FIG. 6, when the batch 60 starts moving by the discharge conveyor 40, the press bar 38 slightly rises and moves away from the upper surface of the batch 60. Then, the ledge 36 moves back together with the press bar 38 to a position where it does not interfere with the stack 50a in preparation for the next rise. At this time, the stack 50a on the ledge 36 is received by the auxiliary ledges 22a and 22b. During the above process, the batch 60 leaves the elevator 29 completely.
As shown in FIG. 7, when the batch 60 leaves the elevator 29, the elevator 29 rises to the position of the auxiliary ledges 22a and 22b. The auxiliary ledges 22a, 22b are then retracted and the stack 50a thereon is received by the elevator 29. In the meantime, the press bar 38 is accommodated in the ledge 36, and the ledge 36 and the press bar 38 are raised to the height shown in FIG. 2 and then advanced to return to the state shown in FIG. Thereafter, this cycle is repeated, and the required number of batches 60 are discharged.

Since the counter ejector 100 according to the embodiment of the present invention has the above-described configuration, the counter ejector 100 has the following effects compared to the conventional example.
(1) In the conventional example, portions corresponding to the discharge conveyor 40, the exit conveyor 41, and the upper conveyor 44 of the present embodiment are fixed in the front-rear direction position and arranged according to the maximum box size. Therefore, the stroke of the pusher is large, and it takes a lot of time for its operation. On the other hand, in the present embodiment, the discharge conveyor 40 is installed sufficiently close to the pusher 24 in accordance with the minimum box size, and the position of the upper conveyor 44 can be adjusted in conjunction with the backstop 26. Therefore, the stroke of the pusher 24 The operating time can be shortened accordingly. This is particularly effective when the box size is small.
(2) In this embodiment, auxiliary ledges 22a and 22b are provided. Thus, the ledge can be retracted only after the conventional elevator returns to the position to receive the next stack, whereas in this embodiment, the stack 50 is sandwiched between the upper conveyor 44 and the press bar 38 is stacked. As soon as the role of pressing 50 is fulfilled, the ledge 36 can be moved back, so that the operation time can be reduced accordingly.
(3) In the conventional example, the ledge supported over almost the entire bottom surface of the box. The reason is as described above. That is, the stroke of the ledge is almost the entire length of the box. On the other hand, in this embodiment, the upper surface of the stack 50 is pressed widely by the air pressure of the blower 32. For this reason, if the ledge 36 supports approximately 2/3 of the box length, the stack 50 will not fall over. Therefore, the stroke of the ledge 36 can be shortened as compared with the conventional example. Accordingly, the time required for the ledge 36 to move forward and backward can be shortened. This is particularly effective when the box size is large.
(4) In this embodiment, since the photoelectric tube 51 and the control panel 52 which are not provided in the conventional example are provided, it is possible to promptly and surely issue a command to lower the ledge 36 by the photoelectric tube 51 and the control panel 52. Thus, the operating time of the ledge 36 can be further shortened.

  The effects of these embodiments of the present invention are shown in FIG. 9 in comparison with the conventional example. Although each operation of the conventional example is connected in series as shown in FIG. 9A, in this embodiment, a part can be performed in parallel as shown in FIG. 9B. It was found that the overall cycle time can be greatly reduced by reducing the operation time.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made without departing from the scope of the present invention. is there. For example, in the above-described embodiment, the discharge conveyor 40 and the outlet conveyor 41 are described as fixed in the front-rear direction. However, like the upper conveyor 44, the discharge conveyor 40 and the outlet conveyor 41 may be moved in conjunction with the backstop 26, and the effect thereof is Exactly the same.

It is a conceptual diagram which shows the structure of the counter ejector which concerns on embodiment of this invention. FIG. 6 is a conceptual diagram illustrating an operation of the counter ejector according to the present embodiment and illustrating a state in the middle of stacking before the stack on the elevator reaches a predetermined number. FIG. 5 is a conceptual diagram illustrating an operation of the counter ejector according to the present embodiment and showing a moment when a stack on the elevator reaches a predetermined number. The operation of the counter ejector of the present embodiment will be described, and is a conceptual diagram showing a state in which the elevator is lowered to the position of the discharge conveyor. It explains the operation of the counter ejector of the present embodiment, and is a conceptual diagram showing a state where the pusher is pushed out until the stack is sandwiched between upper conveyors. The operation of the counter ejector of the present embodiment will be described, and is a conceptual diagram showing a state in which the press bar is slightly raised and separated from the upper surface of the batch. The operation of the counter ejector of the present embodiment will be described, and is a conceptual diagram showing a state where the elevator has been raised to the position of the auxiliary ledge. It is a diagram explaining the operation timing of the ledge which comprises the counter ejector of this embodiment. (A) is explanatory drawing which shows the cycle time of the conventional counter ejector, (b) is explanatory drawing which shows the cycle time of the counter ejector of this embodiment. FIG. 10 is a conceptual diagram illustrating a state in which a conventional counter ejector is operated and a box is dropped and accumulated on an elevator. FIG. 10 is a conceptual diagram illustrating an operation of a conventional counter ejector, showing a state in which a ledge waiting in the upward direction is lowered and enters between the tenth and eleventh sheets of a stack. It explains the operation of a conventional counter ejector, and is a conceptual diagram showing a state in which an elevator has been raised to the height of a ledge forming a stack by receiving a box at the top. It explains the operation of the conventional counter ejector, and is a conceptual diagram showing the stroke of the pusher particularly when the box is short.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folder gluer 2 Delivery roll 3 Box 11 Spanker 20 Frame 21 Rotating lever 22a, 22b Auxiliary ledge 23 Air cylinder 24 Pusher 25 Air cylinder 26 Back stop 27 Motor 28 Screw shaft 29 Elevator 30 Shaft 31 Lever 32 Blower 33 Side frame 34 Guide plate 35 Beam 36 Ledge 37 Ledge drive motor 38 Press bar 39 Air cylinder 40 Discharge conveyor 41 Exit conveyor 42 Rail 43 Frame 44 Upper conveyor 45 Rack 46 Motor 50 Stack 51 Photoelectric tube 52 Control panel 60 Batch A Air

Claims (1)

  In a counter ejector that is attached to the folder gluer and collects and counts the boxes that have been manufactured in a batch and discharges them in batches, a backstop that stops the boxes discharged from the folder gluer, An elevator for receiving, and a ledge for receiving a box that is activated when a stack formed on the elevator reaches a set number and forms a next stack, and a stack on the ledge at a lower portion of the backstop An auxiliary ledge for receiving the stack, and at least an upper conveyor for sandwiching the stack is adapted to move to a certain distance from the backstop in conjunction with the backstop in accordance with the box size, and the upper surface of the box above the elevator A blower that blows air is provided to the box, and the box is pressed by the air pressure of the blower. Counter ejector, characterized in that the.

Images