JPH0683660U - Cardboard sheet stacker loading control device - Google Patents

Abstract

(57) [Summary] [Purpose] It is an object of the present invention to provide a stacking control device for a stacker, which can improve the production by performing a loading process following the production even in an ultra-small order such as making a prototype or supplementing an accident. [Structure] In a corrugated sheet stacker in which corrugated sheets having different cutting lengths are collectively processed and stacked on the same stacker, the top surface of the corrugated sheets stacked on the stacker is detected by the front stopper set by the cutting length. A fixed position detection means composed of a plurality of sensors,
A stacking position detecting means for detecting the uppermost surface of the stacked corrugated cardboard sheets having a short cutting length by a plurality of sensors other than the plurality of sensors in the fixed position detecting means; and a fixed position detecting means and a stacking position detecting means. A loading control device for a corrugated cardboard sheet stacker, comprising a switching means that can be used together or switched by logic.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a loading control device for a corrugated board stacker that controls a stacking operation for a plurality of orders with different cutting lengths when sequentially stacking corrugated board sheets on a stacker in the final step of a corrugated board manufacturing machine.

[0002]

[Prior art]

 Generally, in a corrugated board manufacturing machine, a liner paper is attached to a corrugated core paper to manufacture a continuous sheet, which is then cut to a desired length. Next, as shown in FIGS. 7 and 8, the corrugated sheet having a predetermined length is separated from the sandwich conveyor 51 by controlling the conveying speed of the separating conveyor 52, and the corrugated corrugated sheets are successively separated from each other by a predetermined number. The so-called roofing-shaped corrugated sheet 1 that partially overlaps between each other is controlled by controlling the speeds of the conveyors 52, 53, 54 to separate the corrugated-corrugated sheet 1 into a bundle, and a feeding conveyor. The cardboard sheets 1 can be loaded cleanly and easily from 55 to the pallet 57 on the down stacker 56.

In the stacker section, for example, as shown in FIGS. 3 and 4, the front stopper 58 is positioned slightly longer than the cut length of the corrugated cardboard sheets 1 to be loaded, and the upper and lower two-stage sheet level sensors 5, 6 controls the descending speed of the down stacker 56. However, in recent years, in response to diversifying consumer needs, the production of products has tended to become a large variety of small lots, and along with this, the corrugated cardboard cases that store those products are also becoming smaller lots. became. On the other hand, the operation of the stacker 56 is normally separated for each order, but it took about 25 seconds for the stacker 56 to carry out the order stacker. Therefore, when a subsequent order of a small lot of 25 seconds or less arrives within this required time, there was no choice but to use a batch processing (badge system) that performs stacking on the previous order as a convenience.

[0004]

[Problems to be solved by the device]

 However, there is a tendency that the number of small orders that cannot follow the processing even in the combined stacking mode with separating operation, which is the current stacking operation, increases, and the production time Tp related to this small order is the separating operation as the maximum performance of stacker processing. The production speed had to be reduced so that the combined cycle time (about three times Tc) was reached. In addition, there is a situation in which production of one to several sheets is indispensable for corrugator production due to the production of prototypes and replenishment due to the occurrence of unexpected defective products in the factory operations. In the case of such an ultra-small lot order, the slowdown of the production speed must be greatly reduced, and it may not be possible to produce a good product sheet.

That is, FIG. 4 shows the performance limit situation of the stacking cycle with separation operation, but in the conveyor and stacker after the cut-off knife, the separation transition of small orders 0-1, 0-2, 0-3 and the stacker section. Stacking is taking place. At this time, time point A indicates that the trailing edge 1E of the last sheet of the order 0-1 has been sent to the stacker section and is completed, and the following order 0-2 is also being separated into islands by the conveyor section. -3 continues to be produced. Therefore, the front stopper 58 of the stacker section starts the order changing cycle operation to the cutting length position of order 0-2. The required time Tc is Tc (S), though it depends on the change in cutting length. When the maximum speed Vs = 80 m / min, the average speed Vr = 50 m / min, and the average cutting length L = 1.3 m, the above required time Tc is Vs L Tc≉ (1- ───) Tp− ─── → 3Tc.apprxeq.Tp Vr Vr After Tc (S), the performance is maximized when the leading 0-2S of the order 0-2 arrives at the stacker section entrance at the end of the order changing operation of the front stopper 58. .

The present invention has been made in view of the above points, and it is possible to perform follow-up processing even if the performance exceeds the stacking performance with the ultra-small edge separating operation such as prototyping or repairing accidents. An object of the present invention is to provide a stacker loading control device that can be improved.

[0007]

[Means for Solving the Problems]

 In a corrugated sheet stacker that processes cardboard sheets with different cutting lengths together on the same stacker and stacks them, a plurality of cardboard sheets stacked on the stacker with the front stopper set by the cutting length are used to detect the top surface. A fixed position detecting means including a sensor, a combined position detecting means for detecting the uppermost surface of the stacked corrugated cardboard sheets having a short cutting length by a plurality of sensors other than the plurality of sensors in the fixed position detecting means, A loading control device for a corrugated board sheet stacker is characterized in that the position detection means and the stacking position detection means are composed of switching means that can be used together or switched by logistics.

[0008]

[Action]

 The corrugated board sheet is cut by a corrugated board manufacturing machine (not shown) into a desired length of corrugated corrugated core paper liner paper, and then a predetermined length of corrugated board is removed from the sandwich conveyor. By controlling the transport speed on the detaching conveyor, for example, the corrugated corrugated sheets that overlap each other are overlapped with each other for each specified number of sheets. By controlling the, normally, corrugated cardboard sheets for each small lot are separated into one bundle, and in the case of ultra-small lot orders, these ultra-small lot orders are separated into multiple bundles and separated from the feeding conveyor. Load on a pallet on the down stacker.

At this time, the descending speed of the down stacker is based on the information by the first detecting means by the plurality of level sensors that detect the uppermost surface of the long-cut corrugated cardboard sheets stacked on the down stacker. It is controlled at a moderate speed by a sequence controller. When changing the lot to a short cut length corrugated cardboard sheet, as shown in FIG. 1, the short cut length corrugated cardboard sheet is not front-aligned by the front stopper 58, so that the long cut length corrugated cardboard sheet 1a is not aligned. At the appropriate place, the tips are misaligned and stopped and then stacked. At this time, the means for detecting the uppermost surface of the corrugated cardboard sheet on the down stacker in accordance with the arrival of the first one of the corrugated board sheets 1b having a short cutting length is a fixed position detecting means by a plurality of level sensors, and a corrugated cardboard sheet having a short cutting length. 1b is switched to the stacking position detecting means capable of detecting the uppermost surface.

Then, the sequence controller as the sequence means, based on the detection information signal from the distance sensors arranged in parallel, the low speed solenoid valve LV as the valve opening / closing means, the medium speed downward solenoid valve MV, and the high speed downward solenoid valve HV. Opening / closing operation command of etc. is transmitted to the stacker lifting drive means by ON / OFF signal. Each speed lowering solenoid valve V and each speed governing valve L are interlocked. When the signals detected by both distance sensors are “OFF” and “OFF”, it means that there is no corrugated board sheet in the area of the down stacker, and the down stacker is in a state where it can descend. That is, since it means that the corrugated board sheets are stacked in the area between the level sensors, the down stacker is lowered at a medium speed after 0.5 seconds. Furthermore, when both the distance sensors are both "ON" and "ON" and the middle speed descent continues for a certain time (for example, after 1 or 2 seconds), the down stacker is lowered at a high speed.

When the down stacker descends at a high speed and the distance sensor corresponding to the lower level sensor in the first detecting means is “ON” and the other distance sensors are “OFF”, the detection information signal is sent to the sequence controller. Is entered. This state means that the uppermost surface of the corrugated board sheets stacked on the down stacker is located between the upper level sensor and the lower level sensor in the first detecting means. Then, the combination of the logic of the sequence controller and the timer closes the high-speed lowering solenoid valve HV and the high-speed regulating valve HR 0.5 seconds later, and simultaneously opens the low-speed lowering solenoid valve LV and the low-speed regulating valve LR. A command is issued and the low speed lowering solenoid valve LV and the low speed regulating valve LR are opened.

Then, the pressure oil in the hydraulic cylinder is returned to the tank at a low speed through the tube, the low speed lowering solenoid valve LV and the low speed speed adjusting valve LR. When the pressure oil in the hydraulic cylinder is returned to the oil tank at a low speed, the rod of the hydraulic cylinder rises and the down stacker descends at a low speed via the chain. In this way, while the down stacker is descending, the top surface of the corrugated cardboard sheet on the down stacker is placed between the upper and lower level sensors on the basis of the level detection information constantly detected by the distance sensors arranged in parallel. Control the descending speed.

[0013]

【Example】

 Hereinafter, one example of the implementation of the stacker loading control device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic side view showing an example of implementation of a stacker loading control device according to the present invention. 2 and 3 are functional block diagrams of a loading control device for a corrugated board sheet stacker according to the present invention. In FIG. 1, a corrugated board sheet 1 is cut by a corrugated board manufacturing machine (not shown) into a continuous sheet in which a liner paper is attached to a corrugated corrugated core paper, and then cut into a desired length. By separating the corrugated board sheet 1 from the sandwich conveyor (see Fig. 4) and controlling the conveying speed on the conveyor, for example, a certain number of corrugated corrugated sheets 1 and 1 are overlapped with each other to form a so-called tiled roof. By controlling the speed of the conveyors 52, 53 and 54, the corrugated cardboard sheets 1 are separated into bundles, and the cardboard sheets 1 are stacked on the pallet 4 on the down stacker 3 from the feeding conveyor 2.

At this time, the pallet 4 on the down stacker 3 is already loaded with the cardboard sheet 1a having a long preceding order. The distance of the front stopper 9 is set according to the corrugated cardboard sheet 1a having a long preceding order. In the stacker section S in which the down stacker 3 is vertically movable, for example, level sensors 5 and 6 as first detecting means are arranged on the side surface in two steps, and a second sensor is provided on the top surface on the tip side. Distance sensors 7 and 8 as detection means are arranged in parallel. The distance sensors 7 and 8 are suspended by, for example, a bracket 10 attached to the upper part of the front stopper 9.

In the stacker having such a configuration, as shown in FIG. 1, when the preceding order is the corrugated cardboard sheet 1a having a long cutting length and the succeeding order is the corrugated cardboard sheet 1b having a short cutting length, the switching is performed. The fixed position detecting means is switched to the stacking position detecting means by means to detect the uppermost surface of the corrugated board sheet 1.

That is, in the case of loading the corrugated cardboard sheets 1 a having a long cut length, the fixed position detecting means detects the uppermost surface of the corrugated cardboard sheets 1 and controls the descending speed of the down stacker 3. The upper level sensor 5 in the first detecting means is disposed slightly below the extension of the conveying surface of the feeding conveyor 2. Then, an area (a) is formed between the surface extended from the conveying surface of the feeding conveyor 2 and the surface extended horizontally from the upper level sensor 5. Further, the lower level sensor 6 is arranged below the upper level sensor 5 by several corrugated cardboard sheets. An area (b) is formed between the surfaces of the upper and lower corrugated cardboard sheets that are horizontally extended from the level sensors 5 and 6, and an area (c) is formed on the lower surface that is horizontally extended from the lower level sensor 6. .

The upper and lower level sensors 5 and 6 are connected to the sequence controller 12. Then, based on the information read by the level sensors 5 and 6, the down stacker 3 is moved up and down by operating the corrugated board sheet stacker lifting drive means.

The sequence controller 12 as the sequence means, for example, based on the detection information signals from the upper and lower two-stage level sensors 5 and 6, for example, a low speed solenoid valve LV and a medium speed solenoid valve which are not shown as valve opening / closing means. MV, high-speed solenoid valve HV, etc. open / close operation command is sent to the stacker lifting drive means by ON / OFF signal. Each speed lowering solenoid valve V and each speed regulating valve L are interlocked.

When the signals detected by the level sensors 5 and 6 are “OFF” and “OFF”, it means that the corrugated cardboard sheet 1 does not exist in the area of the down stacker 3, and the down stacker 3 can descend. It is in a state. When the upper level sensor 5 is "OFF" and the lower level sensor 6 is "ON", the down stacker 3 is lowered at a low speed after 0.5 seconds, for example.

Further, when the upper and lower level sensors 5 and 6 are both “ON” and “ON”, it means that the corrugated cardboard sheets 1 are stacked in the area between the level sensors 5 and 6. Therefore, the down stacker 3 is lowered at a medium speed after 0.5 seconds. Furthermore, if the middle speed descent continues for a certain time (for example, after 1 or 2 seconds) while the upper and lower level sensors 5 and 6 are both "ON" and "ON", the down stacker 3 is lowered at a high speed.

When the down stacker 3 descends at a high speed, the lower level sensor 5 is “ON” and the upper level sensor 6 is “OFF”, the detection information signal is input to the sequence controller 12. This state means that the uppermost surface of the cardboard sheets 1 stacked on the down stacker 3 is between the upper level sensor 5 and the lower level sensor 6. Then, depending on the combination of the logic of the sequence controller 12 and the timer, 0. After 5 seconds, the high speed descending solenoid valve HV and the high speed regulating valve HR are closed, and at the same time an opening operation command is issued to the low speed descending solenoid valve LV and the low speed regulating valve LR, and the low speed descending electromagnetic valve LV and the low speed The speed control valve LR is opened.

Then, the pressure oil in the hydraulic cylinder 11 is returned to the tank at a low speed through the tube, the low speed lowering solenoid valve LV, and the low speed regulating valve LR. When the pressure oil of the hydraulic cylinder 11 is returned to the oil tank 13 at a low speed, the rod 11a of the hydraulic cylinder 11 rises and the down stacker 3 descends at a low speed via the chain 14. As described above, while the down stacker 3 is descending, the uppermost surface of the corrugated board sheet 1 on the down stacker 3 is constantly detected based on the level detection information detected by the upper and lower level sensors 5, 6. Control the descending speed so that it is between 5 and 6. The above operation is shown in Table 1.

[0023]

[Table 1]

When stacking the short-cut corrugated sheet 1b on the long-cut corrugated sheet 1a on the stacker 3 by changing the order, as shown in FIGS. Since the corrugated cardboard sheets having a short cutting length are not front-aligned by the front stopper 58, the corrugated sheets 1a having a long cutting length are temporarily stopped and piled up at an appropriate position due to misalignment. At this time, the means for detecting the uppermost surface of the corrugated board sheet on the down stacker in accordance with the arrival of the first one of the corrugated board sheet 1b having a short cutting length is the fixed position detecting means by the plurality of level sensors, and the corrugated board sheet having a short cutting length. The stacking position detection means capable of detecting the uppermost surface of 1b is switched. The means for detecting the top surface of the corrugated board sheet on the stacker 3 is switched from the localization position detecting means to the stacking position detecting means by the switching means. The distance sensor 7 of the combined position detection means detects the same position as the level sensor 5 of the fixed position detection means. The distance sensor 8 detects the same position as the level sensor 6 of the fixed position detecting means.

Therefore, the areas (a), (b) and (c) formed by the level sensors 5 and 6 of the fixed position detecting means are formed. Further, the sequence controller 12 as the sequence means, based on the detection information signals from the distance sensors 7 and 8 arranged in parallel, similarly to the fixed position detecting means, the low speed solenoid valve LV as the valve opening / closing means and the medium speed descent. An opening / closing operation command for the solenoid valve MV, the high-speed lowering solenoid valve HV, etc. is transmitted to the stacker lifting drive means by an ON / OFF signal. Each speed down solenoid valve V and each speed regulating valve L are interlocked. When the signals detected by the distance sensors 7 and 8 are “OFF” and “OFF”, it means that the corrugated board sheet 1 does not exist in the area of the down stacker 3, and the down stacker 3 can be lowered. is there.

When the distance sensor 7 is “OFF” and the distance sensor 8 is “ON”, the down stacker 3 is lowered at a low speed after 0.5 seconds, for example. Further, when the distance sensors 7 and 8 are both “ON” and “ON”, it means that the corrugated cardboard sheets 1 are stacked in the area between the level sensors 6 and 7 in the first detecting means. Therefore, the down stacker 3 is lowered at a medium speed after 0.5 seconds. Furthermore, when the distance sensors 7 and 8 are both "ON" and "ON", and the middle speed descent continues for a certain time (for example, after 1 or 2 seconds), the down stacker 3 is lowered at a high speed.

When the down stacker 3 descends at a high speed, and the distance sensor 8 corresponding to the lower level sensor in the fixed position detecting means is “ON” and the distance sensor 7 is “OFF”, the detection information signal is sequenced. It is input to the controller 12. This state means that the uppermost surface of the corrugated cardboard sheets 1 stacked on the down stacker 3 is located between the upper level sensor 6 and the lower level sensor 7 in the first detecting means. Then, depending on the combination of the logic of the sequence controller 12 and the timer, 0. After 5 seconds, the high speed descending solenoid valve HV and the high speed regulating valve HR are closed, and at the same time an opening operation command is issued to the low speed descending solenoid valve LV and the low speed regulating valve LR, and the low speed descending electromagnetic valve LV and the low speed The speed control valve LR is opened.

Then, the pressure oil in the hydraulic cylinder 11 is returned to the tank at a low speed through the tube, the low speed lowering solenoid valve LV, and the low speed adjusting valve LR. When the pressure oil of the hydraulic cylinder 11 is returned to the oil tank 13 at a low speed, the rod 11a of the hydraulic cylinder 11 rises and the down stacker 3 descends at a low speed via the chain 14. As described above, while the down stacker 3 is descending, the uppermost surface of the corrugated board sheet 1 on the down stacker 3 is leveled up and down based on the level detection information continuously detected by the distance sensors 7 and 8. Control the descending speed so that it is between the sensors 7 and 8. The above operation is the same as that of the fixed position detecting means.

In the above-described embodiment, level sensors 5 and 6 as fixed position detecting means are arranged in two upper and lower stages on the side surface on the upstream side of the stacker S, and the combined position is detected on the upper surface on the downstream side. Although the distance sensors 7 and 8 as means are arranged side by side, the number and installation positions of the detecting means are not limited to those in the above embodiment. For example, a notch may be provided in the center of a fixed shaft that rotatably supports rolls on the downstream side of the feeding conveyor 2, and level sensors 5 and 6 may be arranged above and below the notch, or the side surface of the center may be substantially the same. Level sensors 5 and 6 are arranged vertically, or the distance sensors 7 and 8 are arranged side by side on the substantially central upper surface, or one analog sensor detects the top surface of the corrugated board sheet, or Providing the position detecting means at another position is included in the technical idea of the present invention. Further, although the down stacker has been described in the above embodiment, the present invention can be applied to an up stacker or an up down stacker in which the feeding conveyor moves up and down at the most downstream side. Further, the time setting in the embodiment can be freely selected.

FIG. 5 is a schematic explanatory view showing an embodiment in which three distance sensors A, B and C are arranged at the same level on the upper surface of the stacker. In FIG. 5, the front stopper 58 is set according to the corrugated cardboard sheet 1a having a long cut length, and the distance sensors A, B and C for detecting the uppermost corrugated cardboard sheet are arranged on the upper surface of the down stacker at substantially equal intervals. It is set up. Then, a corrugated ball sheet 1b having a short cutting length is stacked substantially at the center of the corrugated cardboard sheet 1a having a long cutting length. The uppermost surface of the stacked short corrugated cardboard sheets 1b is detected by the central distance sensor B as shown in FIG. 6 (c).

The plurality of distance sensors A, B, C arranged at the same level as described above detect various states as shown in FIG. FIG. 6A shows a state in which the position of the front stopper 58 is set according to the cut length of the long-cut corrugated cardboard sheets 1a, and the long-cut corrugated cardboard sheets 1a are stacked on the down stacker. . In this state, the plurality of distance sensors A, B, C arranged at the same level detect the uppermost corrugated cardboard sheet 1a. FIG. 6B shows a state in which a corrugated sheet 1b having a short cutting length is stacked on the front side on a corrugated cardboard sheet 1a having a long cutting length. In this state, only the distance sensor A detects the uppermost corrugated cardboard sheet 1b. As described above, the corrugated cardboard sheets 1b having short cut lengths are stacked on the front side when the corrugated cardboard sheets 1b are conveyed at a slow speed.

FIG. 6C is as described above. FIG. 6D shows a state in which the corrugated sheet 1b having a short cutting length is stacked on the front stopper 58 side on the corrugated cardboard sheet 1a having a long cutting length. In this state, only the distance sensor C detects the uppermost corrugated cardboard sheet 1b. As described above, the corrugated cardboard sheets 1b having short cut lengths are stacked on the front stopper 58 side when the transportation speed of the corrugated cardboard sheets 1b is high.

FIG. 6 (e) shows a state in which the corrugated sheet 1c having an intermediate cut length is unevenly stacked on the front side as a reference on the corrugated cardboard sheet 1a having a long cut length. In this state, the distance sensors A and B detect the uppermost surface of the corrugated cardboard sheet 1c having the intermediate cut length. In this way, the corrugated cardboard sheets 1c having the intermediate cut length are stacked in the front and rear sides when the transport speed of the corrugated cardboard sheets 1c having the intermediate cut length is relatively slow or heavy. In FIG. 6 (f), the front stopper 58 is set according to the length of the intermediate cut length corrugated board sheet 1c, the intermediate cut length corrugated board sheets 1c are stacked on the down stacker, and the intermediate cut length is further cut. It shows a state in which short corrugated cardboard sheets 1b are stacked on a long corrugated cardboard sheet 1c. In this state, the distance sensor B detects the uppermost object of the corrugated cardboard sheet 1b having a short cutting length. As described above, the corrugated cardboard sheets 1b having short cut lengths are stacked on the front side when the corrugated cardboard sheets 1b are transported at a slow speed or heavy.

[0034]

[Effect of device]

 As described above, the loading control device for the corrugated cardboard sheet stacker according to the present invention is a fixed position detection device including a plurality of sensors for detecting the uppermost surface of the corrugated cardboard sheets stacked on the stacker at the front stopper set by the cutting length. And a stacking position detection unit that detects the top surface of the stacked short corrugated cardboard sheets by a plurality of sensors other than the plurality of sensors in the fixed position detection unit, and a stacking position detection unit. It is equipped with switching means that can be used in combination with position detection means or logistically, and corrugated cardboard sheets with different cutting lengths are stacked on the same stacker with long cutting length corrugated cardboard sheets. can do. In addition, even in the case of ultra-small orders such as making prototypes and replenishing accidents, the production is improved by separating and performing follow-up processing.

[Submission date] August 8, 1994

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

[Means to be solved by the device]

 However, there is a tendency that the number of small orders that cannot follow the processing even in the combined stacking mode with separating operation, which is the current stacking operation, increases, and the production time Tp related to this small order is the separating operation as the maximum performance of stacker processing. The production speed had to be reduced so that it was about three times the combined cycle time Tc. In addition, there is a situation in which production of one to several sheets is indispensable for corrugator production due to the production of prototypes and replenishment due to the occurrence of unexpected defective products in the factory operations. In the case of such an ultra-small lot order, the slowdown of the production speed must be greatly reduced, and it may not be possible to produce a good product sheet.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

That is, FIG. 4 shows the performance limit situation of the stacking cycle with separation operation, but in the conveyor and stacker after the cut-off knife, the separation transition of small orders 0-1, 0-2, 0-3 and the stacker section. Stacking is taking place. At this time, time point A indicates that the trailing edge 1E of the last sheet of the order 0-1 has been sent to the stacker section and is completed, and the following order 0-2 is also being separated into islands by the conveyor section. -3 continues to be produced. Therefore, the front stopper 58 of the stacker section starts the order changing cycle operation to the cutting length position of order 0-2. The required time Tc is Tc (S), though it depends on the change in cutting length. The above required time Tc is Vs L Tc ≈ (1 ------) Tp- --- when the maximum shingling speed Vs = 80 m / min, the average separation speed Vr = 50 m / min, and the average cutting length L = 1.3 m. → 3Tc≅Tp Vr Vr After Tc (S), the maximum performance is the case where the leading 0-2S of the order 0-2 arrives at the stacker section entrance at the end of the order changing operation of the front stopper 58. Become.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of implementation of a loading control device for a corrugated board sheet stacker according to the present invention.

FIG. 2 is a functional block diagram of a loading control device for a corrugated board sheet stacker according to the present invention.

FIG. 3 is a schematic explanatory view of a fixed position detecting means in a loading control device for a corrugated board sheet stacker according to the present invention.

FIG. 4 is an explanatory diagram showing a state of separation on a conveyor.

FIG. 5 is a schematic explanatory view showing a second example of implementation in which three distance sensors A, B, and C are arranged at the same level on the upper surface of the stacker.

FIG. 6A is a schematic explanatory view showing a state in which the position of a front stopper is set according to the cutting length of a long-cut corrugated cardboard sheet and the long-cut corrugated cardboard sheets are stacked on the down stacker. Is. (B) is
It is a schematic explanatory drawing which shows the state which the corrugated board with a short cutting length was piled up on the front side on the stacked corrugated board with a long cutting length of (a). (C) is (a)
FIG. 3 is a schematic explanatory view showing a state where short cut corrugated cardboard sheets are stacked in the approximate center of the stacked long cut corrugated cardboard sheets. (D) is a schematic explanatory view showing a state in which corrugated sheets having a short cutting length are stacked on the front stopper side on the stacked corrugated sheets having a long cutting length in (a). (E) is a schematic explanatory view showing a state in which corrugated cardboard sheets of intermediate cut length are unevenly stacked on the front side as a reference on the stacked corrugated cardboard sheets of long cut length shown in (a). (F)
, The front stopper is set according to the length of the intermediate cutting length, the intermediate cutting length corrugated sheets are stacked on the down stacker, and the short cutting length corrugated sheets are stacked on the front side. It is a schematic explanatory drawing which shows a state.

FIG. 7 is a schematic side view showing an example of a conventional corrugated board manufacturing machine.

8 is a schematic plan view of the corrugated board manufacturing machine of FIG.

[Explanation of symbols]

 S Stacker LV Low speed solenoid valve LR Low speed governor valve MV Medium speed solenoid valve MR Medium speed governor valve HV High speed solenoid valve HR High speed governor valve 1 Corrugated cardboard sheet 1a Long corrugated cardboard sheet 1b Short corrugated cardboard sheet 2 Feeding conveyor 3 Down stacker 4 Pallet 5,6 Level sensor 7,8 Distance sensor 9 Front stopper 10 Bracket 11 Hydraulic cylinder 11a Rod 12 Sequence controller 13 Oil tank 14 Chain

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[Procedure amendment]

[Submission date] August 8, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Submission date] August 8, 1994

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Complementary target item name] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (1)

[Scope of utility model registration request] 1. A cardboard sheet stacker for collectively processing and stacking corrugated cardboard sheets having different cutting lengths on the same stacker, wherein the top surface of the corrugated cardboard sheets stacked on the stacker at the front stopper set by the cutting length is A fixed position detecting means composed of a sensor for detecting, a combined position detecting means for detecting the uppermost surface of the stacked short corrugated cardboard sheets by a sensor other than the plurality of sensors in the fixed position detecting means, and a fixed position detecting means A loading control device for a corrugated cardboard sheet stacker, which comprises a switching means capable of logistically combining or switching the means and the stacking position detecting means.