JPH0371339B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field to which the Invention Pertains] This invention relates to a corrugated box making machine in which a corrugated board that has been glued and folded in advance as a box-formed body is
This invention relates to a counter ejector configured to stack a predetermined number of sheets while counting them one by one, correct them, and then quantitatively discharge them.

[Prior art and its problems] Conventionally, various types of counter ejectors of this type have been implemented. The structure of a typical conventional counter ejector is shown in FIG. That is, in FIG. 1, reference numeral 10 indicates a hopper for stacking and holding folded cardboard boxes. A conveyor belt conveyor 12 is disposed at the bottom of the hopper 10, and above the conveyor belt 12, a stopper 14 and a spanker 16 are arranged at a predetermined distance in the direction of movement of the belt.
and are placed opposite each other. However, the spanker 16
A photoelectric counter 18 for counting the number of corrugated cardboards to be supplied is provided on the corrugated cardboard supply side of the belt 12 on which the corrugated cardboards are disposed. Further, a feeding belt conveyor 20 is disposed adjacent to the cardboard supply side of the belt 12 for feeding cardboard boxes that have been glued and folded into box-formed bodies one by one. Note that a delivery and conveyance means 22 is appropriately provided between the feed belt conveyor 20 and the conveyor belt 12. On the other hand, stopper 14
A carry-out belt conveyor 24 is disposed adjacent to the carry-out belt conveyor 24, and a pressing transfer means 26 is provided above the spanker 16 for intermittently carrying out the cardboard stacked in the hopper 10 onto the carry-out belt conveyor 24. Furthermore, the hopper 10 and the delivery belt conveyor 2
A stabilizing means 28 is provided above the container 4 to prevent a predetermined number of stacked cardboard boxes from collapsing when being carried out.

The counter ejector configured in this way is
Cardboards are fed one by one from the feeding belt conveyor 20 and are supplied to the conveying belt conveyor 12 via the delivery and conveying means 22. At this time, the cardboard boxes are counted by the counter 18 and are sequentially inserted into the bottom of the hopper 10 formed between the stopper 14 and the spanker 16. At this time, the spanker 16 performs a rocking motion by a driving means such as an eccentric crank,
Corrugated cardboard stacked in a hopper 10 is corrected so that it is stacked regularly. In this way, when a predetermined number of cardboard boxes are stacked above the upper end of the stopper 14, the pressing transfer means 26
is operated to carry out a certain amount of cardboard to the carry-out belt conveyor 24.

Therefore, since the conventional counter ejector shown in FIG. Good correction can be achieved. However, in this type of counter ejector, the stacked cardboard boxes in the hopper 10 are pushed out by the pressing transfer means 26 located above the stopper 14 according to the stacking height, so the stacked state of the cardboard boxes changes. However, the number of cardboard boxes carried out is not necessarily constant, and there is a problem in that it is not possible to accurately determine the number of cardboard boxes carried out. In addition, since the stopper 14 that forms the hopper 10 is fixed, it is not only impossible to carry out the required number of cardboard boxes located below the height of the stopper 14, but also it is impossible to straighten the final two or three cardboard boxes. There are drawbacks.

In order to overcome these problems, a counter ejector having two hoppers arranged side by side as shown in FIG. 2 has been proposed and put into practice. That is, the counter ejector shown in FIG. 2 is constructed separately from a hopper 10a that stacks and straightens a predetermined number of corrugated cardboards, and a hopper 10b that is provided with a pressure transfer means for carrying out a predetermined number of stacked corrugated cardboards. .
For convenience of explanation, components having the same functions as those shown in FIG. 1 are given the same reference numerals, and detailed explanation thereof will be omitted. The counter ejector shown in FIG. 2 has a spanker 16 separated from the counter ejector shown in FIG. A conveyor belt conveyor 30 that sequentially conveys the cardboard to 10
and fixed stopper 1 to the rear hopper 10b.
4 and a movable stopper 32 are arranged side by side. Note that the cardboard boxes are supplied one by one to the preceding hopper 10a from above via a feeding belt conveyor 20 and a delivery conveyance means 22. Moreover, a pressing means 34 such as a blower for pressing the cardboard downward is provided above the hopper 10a at the front stage.

The counter ejector configured in this way is
A predetermined number of stacked cardboard boxes are corrected in the hopper 10a at the front stage, and the cardboard boxes are conveyed one by one from the bottom of the hopper 10a to the hopper 10b at the rear stage by a conveyor belt 30. At this time, the cardboard boxes sequentially inserted into the hopper 10b are counted by the counter 18. When a predetermined number of cardboard boxes have been counted, the movable stopper 32 installed in parallel with the fixed stopper 14 is moved upward to align the upper ends of the fixed stopper 14 and the movable stopper 32, thereby counting one end of the predetermined number of stacked cardboard boxes. is positioned above the upper end of the fixed stopper 14. Next, the pressing transfer means 26
By operating the hopper 10b, all the cardboard stacked in the hopper 10b can be smoothly transported to the transport belt conveyor 24.

Therefore, the counter ejector shown in FIG.
This has the advantage that the number of stacked cardboard boxes to be carried out from the hopper can be accurately counted, and furthermore, the number of stacked cardboard boxes to be carried out from the hopper can be surely carried out to the last one. However, since the cardboard is fed from above to the hopper that performs correction,
Since there is insufficient pressure on the corrugated cardboard from above, it is not possible to correct the right angle sufficiently, and furthermore, the corrugated cardboard is easily jammed during conveyance in the hopper at the previous stage.

[Purpose of the invention]

An object of the present invention is to provide a corrugated box making machine that is capable of accurately counting the number of cardboard boxes to be stacked and carried out by stacking a predetermined number of them as a single hopper, and that can properly straighten all the supplied cardboard boxes and smoothly carry them out. To provide a counter ejector.

[Key points of the invention]

The present invention involves feeding cardboard boxes that have been glued and folded into box bodies one by one while counting them, stacking and storing them one after another in a hopper configured to be held between a stopper and a spanker, and correcting them with the spanners. In a counter ejector of a corrugated box making machine configured to intermittently transport a predetermined number of stacked cardboard boxes using a pressing moving means, the stopper has a fixed stopper and a stopper that contacts the fixed stopper to transport a predetermined number of stacked cardboard boxes. a movable stopper that moves upward to push up the cardboard, and an inner spanker that faces the fixed stopper and moves upward together with the movable stopper when a predetermined number of cardboard is stacked between them; The structure comprises a double spanker including an outer spanker for stacking and storing corrugated cardboard newly fed when moving up, and the movable stopper and inner spanker further move up to a predetermined position. The present invention is characterized in that a rocking movement driving means is provided which is connected to the outer spanker via a link mechanism in order to retract the double spanker when the double spanker is moved.

That is, in the present invention, a hopper for stacking and storing corrugated cardboards while sequentially counting them is provided with a fixed stopper and a movable stopper on one side and a double spanker on the other side, so that each time a predetermined number of corrugated cardboards are stacked, By moving the movable stopper and the inner spanner of the double spanker upward to separate and carry out the cardboard boxes, and by stacking and storing newly fed cardboard boxes between the movable stopper and the outer spanker, the number of stacked cardboard boxes to be carried out can be reduced. can be counted with high precision, and smooth stacking and correction of cardboard can be easily realized.

In the above-mentioned counter ejector, it is preferable that the movable stopper is configured to move upward intermittently in three stages using a three-position switching valve.

In addition, when the movable stopper and the inner spanker move upward to a predetermined position, the double spanker is moved back under the action of the link mechanism, and the pressing moving means is advanced. It is preferable to configure it so that it can be carried out.

Furthermore, by providing a vertically movable lifting plate for straightening the final corrugated cardboard at the bottom of the receding corrugated cardboard stacked and stored between the stopper and the double spanker, it is possible to easily , the final corrugated cardboard in the hopper can be smoothly and easily straightened when all the corrugated cardboards are carried out.

[Embodiments of the invention]

Next, embodiments of a counter ejector for a corrugated box making machine according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 3 is an explanatory diagram showing the basic structure of the counter ejector according to the present invention. That is, in the present invention, the configuration of the hopper is significantly changed and improved from the conventional configuration. Note that the means for feeding and conveying the cardboard to the hopper is the same as the conventional structure shown in FIG. 1, so the same reference numerals are given to the same components and detailed explanation will be omitted. The hopper 40 of the counter ejector in the present invention has a conveyor belt conveyor 12 at its bottom, a fixed stopper 42 and a movable stopper 44 arranged side by side at one end, and an inner spanker 46 and an outer spanker 48 at the other end. A double spanker is installed,
Furthermore, a pressing transfer means 50 is provided parallel to the inner spanker 46. Note that above the hopper 40 there is a pressing means 52 that applies an appropriate pressing force to the top surface of the corrugated cardboard that is successively stacked.
will be provided.

However, the movable stopper 44 is arranged in parallel inside the fixed stopper 42, and the three-position cylinder 5
4, it is configured to be vertically movable. Also, on the opposite side of these stoppers 42 and 44, the hopper 4
A bottom lifting plate 56 made of corrugated cardboard is provided at the bottom of 0 so as to be movable up and down. On the other hand, the double spanker located opposite the fixed stopper 42 is configured such that the inner spanker 46 is movable upward relative to the outer spanker 48, and the outer spanker 48 and the inner spanker 46 are movable relative to the fixed stopper 42. It is connected to a drive means 60 such as an eccentric crank via a link mechanism 58 that moves in the direction of separation.

The other configuration is basically the same as that of the conventional counter ejector shown in FIG. Therefore, a specific example of the structure of the counter ejector according to the present invention having the above-mentioned structure is shown in FIG.

Next, the feeding, stacking, and unloading operations of cardboard boxes in the hopper 40 of the counter ejector according to the present invention constructed as described above will be explained below with reference to FIGS. 5a to 5g.

First, the fixed stopper 42 and the double spanker 46,
48 are positioned at a predetermined interval, and during this time, the cardboard boxes are stacked one by one while being counted by the counter 18 (see FIG. 5a). In this way, Hoppa 4
When a predetermined number of cardboard boxes are stacked in 0 and the counter 18 counts out, the movable stopper 4
2 is raised to the first position under the action of the three-position cylinder 54 (see FIG. 5b). At the same time, low-pressure compressed air is introduced into the cylinder connected to the inner spanker 46 so as to cancel out the weight of the spanker. Next, as the cardboard continues to be inserted, the cardboard itself raises the inner spanker 46, and the first proximity switch 62 provided on the outer spanker 48 detects that the inner spanker 46 rises to the first position relative to the outer spanker 48. , the movable stopper 44 is raised to the second position under the action of the three-position cylinder 54 (see FIG. 5c). As the cardboard continues to be inserted, the cardboard itself further raises the inner spanker 46 and the outer spanker 48.
The second proximity switch 64 detects that the movable stopper 44 is raised to the second position, and the movable stopper 44 is raised to the third position (ascent limit) under the action of the three-position cylinder 54 (see Fig. 5d). ). At this point, the front end bottom of the raised predetermined number of stacked cardboard boxes is positioned above the upper end of the fixed stopper 42, and the press transfer means 50 comes into contact with the topmost cardboard box that has been corrected by the outer spanker. . Then, the pressing transfer means 50 is advanced along the upper surface of the cardboard to transport a predetermined number of stacked cardboard to the delivery belt conveyor 24 (see FIG. 5e). After that, double spanker 46,
48 is moved back a predetermined distance via the link mechanism 58 by cylinder operation.

After carrying out a predetermined number of stacked cardboard boxes to the carrying-out belt conveyor 24 in this way, the pressing transfer means 50 is returned to its original position, and the movable stopper 44 and the inner spanker 46 are returned to their original positions. See figure f]. At this time, the continuously fed corrugated cardboard boxes are already stored and stacked at the bottom of the hopper 40. Therefore, when the double spankers 46 and 48 are returned to their original positions via the link mechanism 58 by cylinder operation, the already stacked cardboard also moves together, and its front end hits the fixed stopper 42. contact [see Figure 5g]. In addition, at this time, double spanker 4
The cardboard boxes located below the lower ends of the paperboards 6 and 48 are moved toward the fixed stopper 42 by the operation of the transport belt conveyor 12.

If the above cycle operation is performed continuously and the number of corrugated cardboards supplied does not reach the predetermined number, for example, the final cardboard is supplied in the state shown in Figure 5g, and then the supply of cardboard is finished, At that point, all cardboard boxes will be removed. In this case, the bottom cardboard will not be straightened, so
The lifting plate 56 is raised and positioned so that the lowermost corrugated cardboard is corrected by the inner spanker 46 as shown in FIG. 5c.

The control operation of the movable stopper 44 of the hopper 40 and the double spankers 46, 48 in the present invention described above can generally be realized by a pneumatic control system. One embodiment of this pneumatic control system is shown in FIG. 6. That is, FIG. 6 shows a pneumatic control system in which a pair of cylinders are provided for operating the movable stopper 44, the inner spanker 46, and the link mechanism 58. Therefore, the movable stopper operating cylinders 54, 54 have three-position switching valves 66, 54, respectively.
The inner spanker operating cylinders 68, 68 are connected to an air pressure source via switching valves 70, 70, and the link mechanism operating cylinders 72, 72 are connected to a switching valve 74. connected to a pneumatic source via. However, these switching valves 66,
The operation timings of 70 and 74 are as shown in FIG.

〔Effect of the invention〕

As is clear from the above-mentioned embodiments, according to the present invention, the hopper that counts and stacks the corrugated cardboards that are fed sequentially and stores them is of a single configuration, and the movable stopper and the spanner of the double spanner are moved every predetermined count. The structure is such that the cardboard boxes are lifted up, separated from a predetermined number of stacked cardboard boxes, and transferred to the unloading operation, and the cardboard boxes that are sequentially fed after a predetermined count are straightened between the raised movable stopper and the outer spanner of the double spanner. However, by configuring the containers to be stacked and stored, the number of stacked cardboard boxes to be carried out can be counted with high precision, and the final fed cardboard boxes can be reliably corrected.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of drawings]

FIG. 1 is a mechanism explanatory diagram showing one configuration example of a counter ejector of a conventional corrugated box making machine, FIG. 2 is a mechanism explanatory diagram showing another configuration example of a conventional counter ejector, and FIG. 3 is a mechanism explanatory diagram showing the present invention. FIG. 4 is an explanatory diagram showing the basic structure of the counter ejector of the corrugated box making machine according to the invention; FIG. 4 is an explanatory diagram showing the specific arrangement of the counter ejector shown in FIG. 3; FIGS. Figure 3 is an explanatory diagram of the operating state of the hopper's cardboard unloading function, Figure 6 is a system diagram of the control mechanism of the hopper shown in Figure 3, and Figure 7 is a time chart showing the operation of the control system shown in Figure 6. It is a diagram. 10...Hopper, 12...Transport belt conveyor, 14...Stopper, 16...Spanker, 18
. . . Photoelectric counter, 20 . . . Feeding belt conveyor, 22 . 32...
...Movable stopper, 34...Press means, 40...Hopper, 42...Fixed stopper, 44...Movable stopper, 46...Inner spanker, 48...Outer spanker, 50...Press transfer means, 52...Press means,
54...3 position cylinder, 56...lifting plate, 58...link mechanism, 60...driving means, 6
2...First proximity switch, 64...Second proximity switch, 66...3 position cylinder, 68...
Cylinder for operating the inner spanker, 70...Switching valve, 7
2...Cylinder for link mechanism operation, 74...Switching valve.

Claims (1)

[Scope of Claims] 1. Cardboards glued and folded as a box-formed product are fed while being counted one by one, sequentially stacked and stored in a hopper configured to be held by a stopper and a spanker, and corrected by a spanker. In a counter ejector of a corrugated box making machine configured to intermittently transport a predetermined number of stacked cardboard boxes using a pressing moving means, the stopper is a fixed stopper and the stopper contacts the fixed stopper to transport a predetermined number of stacked cardboard boxes. a movable stopper that moves upward to push up the cardboard when the cardboard is stacked; the spanker faces the fixed stopper; The structure comprises a double spanker including an outer spanker for stacking and storing newly fed cardboard boxes between the movable stopper and the movable stopper when the spanker moves upward, and the movable stopper and the inner spanker are moved until the movable stopper and the inner spanker reach a predetermined position. A counter ejector for a corrugated box making machine, characterized in that a swing movement drive means is provided which is connected to the outer spanker via a link mechanism to move the double spanker backward when the double spanker moves upward. 2. A counter ejector for a corrugated box making machine according to claim 1, wherein the movable stopper is configured to move upward intermittently in three stages by a three-position switching valve. 3. In the counter ejector according to claim 1, when the movable stopper and the inner spanker move upward to a predetermined position, the double spanker is retreated under the action of the link mechanism and the pressing moving means is advanced;
A counter ejector for a corrugated box making machine configured to be held at the upper part of a movable stopper and to carry out a predetermined number of stacked cardboard boxes. 4. In the counter ejector according to claim 1, the final corrugated cardboard is placed at the retreating bottom of the corrugated cardboard stacked and stored between the stopper and the double spanker when all the corrugated cardboards are carried out after the supply of corrugated cardboards is finished. A counter ejector for a corrugated box making machine, which is equipped with a lifting plate that can be moved up and down to correct the problem.