JP5657934B2 - Underlay supply equipment - Google Patents

Description

  The present invention relates to an underlay supply device that automatically supplies a required number of panel-like underlays on a lift table of a sheet stacker.

  In general, in a corrugator that manufactures a corrugated cardboard sheet, trimming the ears on both sides of a continuous double-sided cardboard or double-sided cardboard sent out from a double facer and cutting it into a required width dimension with a slitter. A continuous corrugated board is formed, and the plurality of continuous corrugated boards are cut in the width direction by a rotary cutter to form a plurality of rectangular corrugated cardboard sheets to a predetermined length, and the corrugated board sheets are provided downstream of the rotary cutter. Wrapped in a tile shape in the transport direction on the transport conveyor and transported to the downstream side. During the transport, the wrap-shaped corrugated cardboard sheet is divided for each set number of sheets, and the sorted corrugated cardboard sheet is downstream from the carry-out end of the transport conveyor. They are stacked by a sheet stacker provided on the side.

  8F and 8G show the sheet stacker 1 provided on the downstream side of the transport conveyor 60. FIG. This sheet stacker 1 has a lifting table 2 and a front guide 3 and a back guide 4 disposed on the lifting table 2 and facing each other, and is a rectangular corrugated cardboard unloaded from the unloading end of the transfer conveyor 60. By colliding the front end of the sheet S with the front guide 3, the sheet S is dropped between the front guide 3 and the back guide 4 and supported by the elevating table 2, and the elevating table 2 is unloaded from the conveyor 60. The cardboard sheets S are sequentially stacked by being lowered according to the number of carry-outs.

Here, the lifting table 2 has a plurality of rollers 5 arranged in parallel in a direction orthogonal to the carrying-out direction of the cardboard sheet S on the conveyor 60, and supports the cardboard sheet S with the plurality of rollers 5. When the elevating table 2 is stopped lowered to the lower limit position, discharge conveyor connected to pile sheet S ₀ stacked by rotating a plurality of rollers 5 in one direction in a direction perpendicular to the transport conveyor 60 to the elevating table 2 61 is sent out.

  When stacking the corrugated cardboard sheets S by the sheet stacker 1 as described above, usually a relatively rigid base P made of a panel such as plywood is placed on the roller 5 of the lifting table 2, and the corrugated cardboard sheet is placed on the base P. S is stacked.

  In this case, the underlay P has an optimum size according to the length and width dimension of the corrugated cardboard sheet S, and, by a corrugator, for example, six cardboards in the width direction as shown in FIG. When the sheets S are formed in close contact with each other at the same time, the six underlays P are placed on the elevating table 2 with the side edges in contact with each other, and the corrugated cardboard sheet S is placed on each underlay P. Are stacked.

  Here, if the underlay P is manually arranged on the lifting table 2, workability is poor and the lifting table 2 moves up and down, which is extremely dangerous. In order to eliminate such inconvenience, Patent Document 1 proposes a supply device that automatically supplies the underlay P to the lifting table 2 of the sheet stacker 1.

  In the supply device for the underlay described in the above-mentioned Patent Document 1, an underlay assembly made up of a large number of underlays is fed onto the lift table of the lift device by the underlay transport device, and the underlay assembly supported by the lift table is sent to the underlay assembly. The pusher device feeds them one by one from the top to the upper part of the elevator conveyor. The elevator conveyor transports the basement downward for a fixed stroke intermittently, and delivers the basement to and from the receive conveyor arranged below. Each time the above-mentioned underlay is delivered, the receiving conveyor is moved intermittently with the distance corresponding to the width of the underlay as the movement amount to align the required number of underlays, and the aligned underlays are placed on the lift table of the sheet stacker. To send it to.

  Here, as mentioned above, several types of cardboard sheets with different lengths and width dimensions are stacked on the lift table of the sheet stacker. Therefore, several types of underlays with different lengths and width dimensions are prepared. Has been. At this time, the elevator conveyor supports and lowers both ends of the underlay. Therefore, if the length of the underlay is greatly different, the underlay cannot be supported and lowered.

  Therefore, in the supply device of the underlay described in Patent Document 1, an elevator conveyor that supplies the underlay on the receive conveyor and a pusher device that supplies the underlay one by one to the upper part of the elevator conveyor are paired. A plurality of underlay feeding devices to be configured are arranged in parallel, and one of the plurality of underlay feeding devices is selected, and an underlay of an appropriate size is sent onto the receive conveyor.

JP 2005-239331 A

  By the way, in the underlay supply device described in Patent Document 1, the pusher device and the elevator conveyor constituting the underlay feeding device are set so that the transport direction of the underlay by the pusher device is the same as the transport direction of the receive conveyor. Because of the parallel arrangement, when installing multiple underlay feeding devices, a very long receive conveyor is required, and a large installation space must be secured, which improves the space saving. There was a point left to do.

  In addition, since the elevator conveyor supports and lowers both ends of the underlay, when the length of the underlay becomes long, the underlay bends downward at the center in the length direction, and the support becomes unstable and is driven intermittently. There is a possibility that the elevator conveyor may fall due to an impact at the time of starting or stopping, and there is still a point to be improved in order to move the underlay stably and surely.

  An object of the present invention is to provide an underlay supply device that can reduce the installation space.

In order to solve the above-described problems, in the present invention, a receive conveyor that feeds a rectangular underlay toward a lifting / lowering table of a sheet stacker that stacks sheets, and a parallel arrangement that sends the underlay one by one on the transport surface of the receive conveyor Each of the plurality of underlay feeding devices, each of the plurality of underlay feeding devices has an unloading end facing one side portion above the conveying path of the receive conveyor, and the underlays one by one toward the unloading end. The underlay supply conveyor to be transported and the serial arrangement aligned in a straight line with respect to the underlay supply conveyor, receiving the underlay sent out from the underlay supply conveyor sequentially, and intermittently downward for a fixed stroke toward the transport surface of the receive conveyor and a underlying transfer device for transferring the said underlying transfer device, the length in the direction perpendicular to the underlying conveying direction of the receive conveyor A pair of rotating members provided with a receiving plate that supports the lower surface side of the underlay on the extending rotating shaft is provided so as to face each other in the front and rear direction of the underlay of the receive conveyor, and the pair of front and rear rotating members are equally spaced in the vertical direction. The underlay that is disposed and transferred downward from the upper pair of front and rear receiving plates by rotation of the pair of front and rear rotating members in opposite directions is supported by the lower plate of the pair of front and rear rotating members. It is configured to have a rotation drive device that synchronizes a pair of front and rear rotating members of each stage and rotates a set angle, and each time the underlay transferred downward by the underlay transfer device is supplied onto the conveying surface of the receive conveyor A configuration is adopted in which the required number of underlays are aligned on the transport surface of the receive conveyor with the distance corresponding to the width dimension of the sheets stacked on the lift table of the sheet stacker as a movement amount. It was was.

  In the underlay supply device having the above-described configuration, the underlay is sent from the underlay supply conveyor to the upper portion of the underlay transfer device, and the underlay transfer device is used to move the underlay intermittently downward for a certain stroke on the transport surface of the receive conveyor. Supply the underlay.

  When the next stack of corrugated cardboard sheets by the sheet stacker is supplied and placed on the receive conveyor from the underlay transport device, the distance corresponding to the width dimension of the next stack on which the receive conveyor is stacked is used as the movement amount. Move to the sheet stacker intermittently, and place the necessary number of underlays according to the number of stacked cardboard sheets on the receiving surface of the receive conveyor in a state corresponding to the width of the stacked cardboard sheets and wait. .

  Then, one lot of cardboard sheets are stacked by the sheet stacker, and when the piled sheets are discharged from the lifting table, the receive conveyor is driven and aligned on the transport surface for the next lot of stacked sheets. The necessary number of underlays are conveyed and supplied onto the lift table of the sheet stacker in an aligned state.

  Here, as the underlay used for stacking the corrugated cardboard sheets, the one whose width dimension is equal to the width dimension between both side edges of the corrugated cardboard sheets or smaller than the width dimension of the corrugated cardboard sheets is adopted. At this time, there are many types of corrugated cardboard sheets sent to the sheet stacker that have different width dimensions for each lot. It is necessary to sequentially arrange the underlays on the receive conveyor in the order of lots based on the corrugated sheet stacking process table, which is very laborious. For this reason, it is preferable to prepare several types of underlays having different width dimensions, and to support a corrugated cardboard sheet having several types of width dimensions that are the same as or larger than the width dimensions of the underlay.

  As described above, when a corrugated sheet having several types of widths that are the same as or larger than the width of the underlay is supported by one underlay, a plurality of underlay feeding devices for supplying the underlay to the receive conveyor may be provided.

  In the underlay supply device according to the present invention, the underlay feeding device for feeding the underlay one by one onto the transport surface of the receive conveyor is arranged with the underlay transfer device disposed downstream of the carry-out end of the underlay supply conveyor, Since the conveyor and the underlay transfer device are arranged in series in a line perpendicular to the conveying direction of the receive conveyor, the underlay supply conveyor and the underlay transfer device are arranged in parallel on the receiving surface of the receive conveyor. In comparison, a large number of underlay feeding devices can be arranged in an installation space of the same size.

  As a result, many different sizes of underlays can be supplied on the lift table of the sheet stacker, and conversely, when the number of underlays of different sizes is the same, the installation space can be reduced. it can.

  Here, as the underlay transfer device, a receiving plate for supporting both sides of the underlay was attached between a pair of left and right chains provided with inversion portions at both upper and lower ends of the carrier side chain moving downward and the return side chain moving upward. It is possible to employ a pair of receiving plate conveying devices provided before and after the receiving conveyor in the conveying direction so that the carrier side chains face each other.

As the above-mentioned underlay transfer device, a pair of rotating members provided with a receiving plate for supporting the lower side of the underlay on a rotating shaft extending in a direction orthogonal to the underlay conveying direction of the receive conveyor are opposed in the front and rear of the underlay conveying direction of the receive conveyor. The pair of front and rear rotating members are arranged at equal intervals in the up and down direction, and are transferred downward from the pair of front and rear receiving plates by rotation of the pair of front and rear rotating members in opposite directions. underlayment is, a rotary drive device for setting the angle rotated by tuning the pair of front and rear rotary members of each stage to be supported by the receiving plate of the pair of front and rear rotary member of the lower stage is provided, a pair of rotation before and after each stage Of the member receiving plates, at least the uppermost pair of front and rear rotating member receiving plates having a belt-like configuration extending in the length direction of the rotating shaft is used to attach the receiving plate to the chain. It was compared to the underlay transfer device, amount which can eliminate the need for sprockets for reversing the movement of the chain, it is possible to reduce the size of the width of the underlying transfer device.

  As described above, in the present invention, the underlay supply conveyor and the underlay transfer device constituting the underlay feeding device are arranged on the downstream side of the carry-out end of the underlay supply conveyor, and the underlay supply conveyor and the underlay are provided. Compared to the case where the underlay supply conveyor and the underlay transport device are arranged in parallel in the transport direction of the receive conveyor by arranging the transfer device in a straight line in the direction orthogonal to the transport direction of the receive conveyor. Many underlay feeding devices can be arranged in the installation space of the same size, and many underlays of different sizes can be sent to the receive conveyor. On the contrary, when the same number of underlay feeding devices are installed, the installation space can be reduced.

Schematic plan view showing an embodiment of an underlay supply device according to the present invention Top view of the underlay feeding device Sectional view along line III-III in FIG. Sectional view along line IV-IV in FIG. Sectional view along line VV in FIG. (A), (B) are cross-sectional views showing the operating state of the underlay transfer device shown in FIG. 5 in stages. Sectional drawing which shows the other example of an underlay transfer apparatus, (c) thru | or (e) show the operation state in steps (F) is a plan view showing a conventional sheet stacker, and (g) is a front view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, an underlay supply device according to the present invention includes a receive conveyor 10 that feeds an alignment body of rectangular underlays P toward an elevating table 2 of a sheet stacker 1, and a conveyor surface of the receive conveyor 10. It consists of a first underlay feeding device 20a and a second underlay feeding device 20b arranged in parallel to feed the underlay P one by one.

  As shown in FIGS. 2 to 4, the receive conveyor 10 includes a plurality of belt conveyors 11 arranged in parallel. The plurality of belt conveyors 11 are configured to convey the underlay P, which is aligned so that a pair of opposed long sides are opposed to each other on the conveyance surface, toward the lift table 2.

  2 to 5 show the first underlay feeding device 20a. The second underlay feeding device 20b has the same configuration as the first underlay feeding device 20a, and is different in that an underlay P having a different length and width is fed into the receive conveyor 10. Therefore, here, the configuration of the first underlay feeding device 20a will be described below, and the second underlay feeding device 20b will be described by attaching the same reference numerals to the same parts as the first underlay feeding device 20a. Omitted.

  The first underlay feeding device 20a receives the underlay supply conveyor 30 provided on the upper side of the conveyance path of the receive conveyor 10 and the underlay P fed from the underlay supply conveyor 30, and lowers the underlay P downward. The underlay transporting device 31 is configured to intermittently move toward the transporting surface of the receive conveyor 10 and send it onto the transport surface of the receive conveyor 10. The underlay supply conveyor 30 and the underlay transporting device 31 correspond to the underlay transport direction of the receive conveyor 10. A series arrangement is arranged in a straight line in an orthogonal direction.

  The underlay supply conveyor 30 is a roller conveyor. The underlay supply conveyor 30 is arranged so that its carry-out end faces one side of the carry path of the receive conveyor 10 and conveys the underlay P one by one toward the carry-out end one by one with its opposing short sides being front and rear. Thus, it is fed from the carry-out end to the upper part of the underlay transfer device 31.

  The underlay transfer device 31 is provided with a pair of front and rear rotating members 32 facing each other in the front-rear direction in the transport direction of the receive conveyor 10 at equal intervals in the vertical direction, and is fed from the underlay supply conveyor 30 by the pair of front and rear rotating members 32. The underlay P, which receives the coming underlay P and is transferred downward by the opposite inward rotations so that the pair of front and rear rotating members 32 face each other, is supported by the lower front and rear pair of rotating members 32. The pair of front and rear rotating members 32 at each stage are synchronized by the rotation drive device 40 and rotated by a set angle, and the underlay P transferred downward from the pair of front and rear rotating members 32 at the lowermost stage is placed on the transport surface of the receive conveyor 10. It is made to send in order.

  Here, the rotating member 32 includes four receiving plates 34 that support the lower surface side portion of the underlay P on the outer periphery of the rotary shaft 33 that extends long in a direction orthogonal to the underlay conveyance direction of the receive conveyor 10 in the circumferential direction. The both ends of the rotary shaft 33 are rotatably supported by the opposing side frames 36 of the portal frame 35 provided above the receive conveyor 10.

  The cross-sectional shape around the rotation shaft 33 that is rotatably supported by the side frames 36 at both ends is circular, and the cross-sectional shape of the other intermediate portion is a regular square. Each of the four receiving plates 34 is attached to each side of the regular quadrangular rotating shaft 33 so as to protrude in parallel therewith.

  Of the pair of front and rear rotating members 32 at each stage, the receiving plate 34 of the pair of front and rear rotating members 32 at the uppermost stage protrudes from the vicinity of the regular quadrangular portion of the rotating shaft 33 and has a length equal to that of the underlay P. It is short enough to receive and support the part, and its width is a strip shape extending in the axial direction of the rotating shaft 33. On the other hand, the receiving plates 34 of the remaining pair of front and rear rotating members 32 other than the pair of front and rear rotating members 32 at the uppermost stage can receive and support part of the side portions extending in the long side direction of the underlay P in both length and width. A plurality of short plates are provided at intervals in the axial direction of the rotating shaft 33, and the plurality of receiving plates 34 are positioned in the axial direction with the receiving plate 34 of the adjacent lower rotating member 32. It is a staggered arrangement.

  Furthermore, each of the both sides of the strip-shaped receiving plate 34 in the pair of front and rear rotating members 32 at the uppermost stage is located inside the inner side of the short-shaped receiving plate 34 of the pair of rotating members 32 on the lowermost side, Further, the strip-shaped receiving plate 34 is formed with a notch 37 at a position facing the short-shaped receiving plate 34 of the pair of front and rear rotating members 32 at the lower stage, and the short-shaped receiving plate 34 is rotated when the rotating member 32 rotates. It does not interfere with the belt-shaped receiving plate 34.

  The four sides of the square-shaped portion of the rotating shaft 33 in each stage are structured so as to be located at the same rotational position, and the receiving plate 34 is attached so as to protrude in parallel with the sides from these sides. It has been. The protruding length and the width of the receiving plate 34 may be large enough to stably support the underlay P. When the width is long as shown in FIG. 3, the uppermost receiving plate 34 is provided. Thus, it is only necessary to attach a single receiving plate 34 in the width direction of the rotating shaft 33. When the width is short, it extends in the long side direction of the underlay P like the receiving plate 34 in the second stage or lower. It is only necessary to attach at least a pair of front and rear receiving plates 34 that support both ends of the side portion.

  As described above, the pair of rotating members 32 are arranged so as to face each other with a space capable of supporting the lower surfaces of both sides of the long side portion of the underlay P fed by the receiving plate 34 of the rotating member 32. ing.

  As shown in FIGS. 3 and 4, the rotational drive device 40 supports a motor 41 with a speed reducer on one side frame 36 of the portal frame 35 and bevel gears that mesh with each other the rotation of the output shaft 42 of the motor 41. 43 is transmitted to the rotation shaft 33 of the pair of front and rear rotation members 32, and the rotation of the rotation shaft 33 of the pair of front and rear rotation members 32 is transmitted via the transmission device 44 to the pair of front and rear pairs of each stage. The rotation is transmitted to the rotation shaft 33 of the rotation member 32.

  Here, as the transmission device 44, a pair of toothed pulleys 45 are attached to the rotating shafts 33 of the pair of front and rear rotating members 32 at each stage, and the timing belt 46 is stretched between the toothed pulleys 45 opposed vertically to move up and down. Although the belt transmission that sequentially transmits is shown, the transmission 44 is not limited to this. For example, a chain transmission device that spans a chain between sprockets may be used.

  In the rotary drive device 40 having the above-described configuration, the rotary shafts 33 of the pair of front and rear rotary members 32 in each stage are received in the direction in which the underlay P supported by the receiving plate 34 is dropped and discharged, that is, the receiving members facing each other. Each of the plates 34 is tuned symmetrically and rotated 90 ° in the opposite inner direction.

  As shown in FIG. 3 and FIG. 4, the upper surface of the pair of front and rear rotary members 32 from the underlay supply conveyor 30 is in a horizontal state between the front ends of the rotary members 32 of the pair of underlay transfer devices 31. A pair of front and rear positioning members 50 for positioning the front end in the moving direction to the front side of the underlay P that is fed onto the receiving plate 34 that is maintained in a standby state are provided.

  Each of the pair of front and rear positioning members 50 is formed of a belt plate and extends in the vertical direction, and guides the falling movement of the underlay P transferred downward from the uppermost pair of front and rear rotation members 32. ing.

  Also, a pair of front and rear guide members 51 are provided so as to face each other between the front and rear end portions of the respective rotation members 32 of the pair of underlay transfer devices 31. Each of the pair of front and rear guide members 51 is also formed of a band plate and extends in the up-down direction, and is provided on both side ends of the long side portion of the underlay P that is transferred downward from the pair of front and rear rotation members 32. Each of them is moved while being guided back and forth.

The underlay supply device shown in the embodiment has the above-described structure. In this supply device, when the cardboard sheets S are stacked on the underlay P on the lifting table 2 of the sheet stacker 1, the first underlay feeding device. The required number of underlays P required for stacking the cardboard sheets S of the next lot is fed onto the transport surface of the receive conveyor 10 by the 20a or second underlay feeding device 20b. same allowed to stand in a state of being aligned on the conveying surface, pile sheet S ₀ of the previous on the lifting table 2 which is lowered to the lower limit position where the same height as the transporting surface from above the lifting table 2 with underlayment P When it was sent out onto the discharge conveyor which is the height conveying surface, it was waiting on the conveying surface by driving the receive conveyor 10 The aligned underlay P is fed onto the lift table 2.

  When sending and transferring the underlay P to the receive conveyor 10, the underlay P of the required size is opposed to the conveying surface of the underlay feed device 30 a or 20 b suitable for feeding the underlay P. A pair of short sides are fed continuously and intermittently one by one.

  Now, when the underlay P is intermittently continuously supplied one by one onto the transport surface of the underlay supply conveyor 30 of the first underlay feeding device 20a, the underlay P is transferred to the underlay transport device 31 by the underlay supply conveyor 30. It is fed between the pair of front and rear rotating members 32 at the uppermost stage.

  At this time, the underlay P is an upper surface of the receiving plate 34 that protrudes inward horizontally and stands by so as to face each other from the upper sides of the regular rectangular shape of the pair of rotating shafts 33 of the pair of front and rear rotating members 32 facing each other. In the state where a part of both sides of the long side portion of the lower surface is supported, it is fed between the pair of front and rear rotating members 32, and the short side on the front side in the moving direction comes into contact with the positioning member 50 and the underlay P stops. Then, the motor 41 is driven, and the pair of front and rear rotating members 32 of each stage are simultaneously synchronized with each other as indicated by arrows in FIG.

  Here, since the uppermost receiving plate 34 has a belt-like shape extending in the axial direction of the rotary shaft 33 that is the conveying direction of the underlay P, a pair of long side portions of the underlay P conveyed by the underlay supply conveyor 30 Each side of the can be supported smoothly.

  In addition, when the short side on the front side in the movement direction of the underlay P is shockedly contacted with the positioning member 50, the underlay P moves in the direction opposite to the conveyance direction due to the reaction force at the time of collision, and the short side on the front side in the movement direction. May not be able to be positioned. Therefore, in the embodiment, the speed is gradually decreased from a position slightly before the short side on the front side of the underlay P in contact with the positioning member 50 so that the underlay P stops at the same time as it comes into contact with the positioning member 50. The speed of the supply conveyor 30 is controlled.

  The underlay P on which both sides of the long side portion of the lower surface are supported by the receiving plate 34 of the pair of front and rear rotating members 32 by 90 ° inward rotation of the pair of front and rear rotating members 32 at the uppermost stage. Is attached to the same rotational position as the uppermost receiving plate 34 of the lower pair of rotating members 32 that are transferred downward by the rotation of the receiving plate 34 and rotate in the same manner by 90 °. The innermost receiving plate 34 faces the falling path of the underlay P, and the underlay P is transferred between the lower plate and the receiving plate 34 of the pair of front and rear rotating members 32. FIGS. 6A and 6B show the delivery state of the underlay P in stages.

  The underlay P delivered to the receiving plate 34 of the pair of front and rear rotating members 32 at the lower stage is held in a horizontal state by 90 ° synchronous rotation of the pair of front and rear rotating members 32 at each stage. Further, when the underlay P moves downward, the underlay P is guided by the positioning member 50 and the guide member 51. For this reason, the underlay P is supported at a predetermined position of the receiving plate 34 of the pair of front and rear rotating members 32 at the lower stage.

  When the underlay P is delivered from the pair of front and rear rotating members 32 to the lower pair of front and rear rotating members 32 and the pair of front and rear rotating members 32 stops, the upper and lower pair of front and rear rotating members 32 rotate. When the next underlay P is fed between the members 32 and the next underlay P comes into contact with the positioning member 50 and stops, the motor 41 is driven to simultaneously rotate the pair of front and rear rotating members 32 at 90 °. Rotate in sync with.

  For this reason, the base P sent in first is supported by the pair of front and rear rotating members 32 at the third stage from the top, and the second base P supported by the pair of front and rear rotating members 32 at the top is the upper part. Are supported sequentially by a pair of front and rear rotating members 32 in the second stage.

  The underlay supply conveyor 30 is driven each time the motor 41 stops to feed the underlay P between the uppermost pair of front and rear rotating members 32, and the underlay P is fed into the motor 41 by the uppermost pair of front and rear rotating members 32. When it stops, it is driven and the pair of front and rear rotating members 32 at each stage are rotated synchronously at 90 ° intervals.

  For this reason, as shown in FIG. 5, the underlay P sequentially fed into the upper portion of the underlay transfer device 31 is supported by a pair of front and rear rotating members 32. When the rotating member 32 is simultaneously rotated by 90 ° by driving the motor 41, the underlay P supported by the pair of rotating members 32 at the lowermost stage moves downward and is supported by the transport surface of the receive conveyor 10. Is done.

Here, when stacking the cardboard sheets S of the next lot by the sheet stacker 1, a rectangular cardboard sheet S is manufactured from one continuous cardboard and conveyed to the sheet stacker 1, and one sheet P is required. In the case where it is to be done, it waits in a state in which one underlay P is supported by the receive conveyor 10. When the pile sheet S ₀ of the previous lot in the lifting table 2 of the sheet stacker 1 is discharged to the discharge conveyor, drives the receive conveyor 10, a standby state for the underlay of stacking corrugated sheet S of the next lot 1 sheet of underlay P held on the lift table 2 is conveyed.

  On the other hand, when the next lot is manufactured from a plurality of continuous cardboards to a plurality of rows of rectangular cardboard sheets S and conveyed to the sheet stacker 1, the underlay P is provided for each row of the rectangular cardboard sheets S. Therefore, a plurality of underlays P are necessary.

  In such a case, the operation of supplying and placing the underlay P supported by the pair of front and rear rotating members 32 at the bottom of the underlay transfer device 31 on the transport surface of the receive conveyor 10, and the receive conveyor 10 By alternately repeating the operation of transporting the underlay P toward the lifting table 2 of the sheet stacker 1 using the distance corresponding to the width dimension between the both side edges of the rectangular corrugated cardboard sheet S as the movement amount, Arrange the necessary number of underlays P and wait.

  At this time, when the underlay P having the same width as that of the corrugated cardboard sheet S is used, the long sides of the underlays P are aligned and waited. In addition, when using a base P having a small width, it is preferable that the base P is aligned and waited so as to be positioned below the central portion of the corrugated cardboard sheet S to be stacked.

When the pile sheet S ₀ of the previous batch stacked on the lifting table 2 of the sheet stacker 1 is the height of the conveying surface is discharged to the discharge conveyor have the same from the lifting table 2, high conveyance surface The receiving conveyor 10 having the same length is driven and conveyed and placed on the lifting table 2 in a state in which the required number of underlays P according to the number of rows of the corrugated cardboard sheets S are aligned. The cardboard sheets S are stacked on the underlay P for each row.

  In the underlay supply device shown in the embodiment, an underlay transport device 31 is arranged downstream of the carry-out end of the underlay supply conveyor 30, and the underlay supply conveyor 30 and the underlay transport device 31 are orthogonal to the conveying direction of the receive conveyor 10. As compared with the case where the underlay supply conveyor 30 and the underlay transport device 31 are arranged in parallel in the conveying direction of the receive conveyor 10, there are many in the installation space of the same size. Underlay feeding devices can be arranged, and many underlays of different sizes can be fed into the receive conveyor 10. On the contrary, when the same number of underlay feeding devices are installed, the installation space can be reduced.

  In FIG. 5, as the rotating member 32, the rotating shaft 33 is provided with four receiving plates 34 projecting from the rotating shaft 33 at intervals of 90 ° in the rotating direction, but the receiving plate attached to the rotating shaft 33 is shown. The number of 34 is not limited to four. For example, as shown in FIG. 7, three receiving plates 34 may be provided on the equilateral triangular portion of the rotating shaft 33 so as to protrude from each side at intervals of 120 ° in the rotation direction. .

  As shown in FIG. 7, the number of the receiving plates 34 is three, and the rotating member 32 attached to the same rotational position in each step is rotated by 120 ° in synchronism with the rotating member 32 of each step by the motor 41. As shown by (c) to (e) in the figure, the underlay P is delivered between a pair of front and rear rotating members 32 on the upper and lower sides adjacent to each other.

  The underlay transfer device 31 is not limited to the illustrated example. For example, a pair of receiving plate conveying devices in which receiving plates that support both sides of the underlay are attached between a pair of left and right chains provided with inversion portions at both upper and lower ends of a carrier side chain that moves downward and a return side chain that moves upward May be provided before and after the receiving conveyor in the conveying direction so that the carrier side chains face each other.

DESCRIPTION OF SYMBOLS 1 Sheet stacker 2 Lifting table 10 Receive conveyor 20a 1st underlay feeding apparatus 20b 2nd underlay feeding apparatus 30 Underlay supply conveyor 31 Underlay transfer apparatus 32 Rotating member 33 Rotating shaft 34 Receptacle 40 Rotation drive apparatus

Claims (2)

A receiving conveyor that feeds a rectangular underlayment toward a lifting / lowering table of a sheet stacker that stacks sheets, and a plurality of underlay feeding devices that are arranged in parallel to send the underlay one by one onto the conveying surface of the receive conveyor, Each of the underlay feeding devices has an unloading end facing one side part above the conveying path of the receive conveyor, and conveys the underlay one by one toward the unloading end, and the underlay supply conveyor It is a serial arrangement arranged in a straight line, and has an underlay transfer device that sequentially receives the underlay sent from the underlay supply conveyor and transfers it downwardly on the transport surface of the receive conveyor intermittently for a certain stroke,
The underlay transfer device faces a pair of rotating members provided with a receiving plate for supporting the lower side of the underlay on a rotating shaft extending in a direction orthogonal to the underlay conveyance direction of the receive conveyor, in front and rear in the underlay conveyance direction of the receive conveyor. The pair of front and rear rotating members are arranged at equal intervals in the up and down direction, and are transferred downward from the pair of front and rear receiving plates by rotation of the pair of front and rear rotating members in opposite directions. The underlay is configured to be provided with a rotation drive device that synchronizes the pair of front and rear rotating members of each stage so as to be supported by the receiving plates of the pair of front and rear rotating members of the lower stage, and rotates a set angle.
Each time the underlay transported downward by the underlay transport device is supplied onto the conveying surface of the receive conveyor, the distance corresponding to the width dimension of the sheets stacked on the elevating table of the sheet stacker is used as the required number of underlays. An underlay supply device that aligns the conveyor on the transport surface of the receive conveyor. The at least one pair of front and rear rotation members of the upper and lower pair of rotation members in the underlay transfer device has a belt-like configuration extending in the length direction of the rotation shaft. Underlay feeding device as described in.

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