JP4392535B2 - Blank sheet feeder - Google Patents

Description

  The present invention relates to a supply device for taking out, one by one, blank sheets stacked in a sheet magazine and supplying them to a lower conveyor in a wrap-around type caser.

In the wrap-around type caser, there are devices disclosed in Patent Documents 1 and 2, for example, as devices for sucking and taking out the blank sheets stacked on the sheet magazine one by one. This device adsorbs and holds one blank sheet located at the head by adsorbing the adsorbing means from the lower side to a sheet magazine in which a large number of blank sheets are stacked and stored in an inclined posture, and lowers the adsorbing means By doing so, it is delivered to the lower conveyor. Moreover, the taken-out blank sheet is bent into a U-shape with the upper part opened along the folding line attached to the sheet by bringing it into contact with the folding guide before being transferred to the lower conveyor. It is made semi-boxed. Thereafter, the blank sheet is delivered to a conveyor, and the blank sheet is held in a U shape by the front and rear holding claws disposed on the conveyor, and is transferred.
JP 2001-171617 A Japanese Patent Publication No. 8-9832

  According to the above-described method, when the blank sheet folded in a U-shape is transferred between the holding claws of the lower conveyor, it is necessary to temporarily stop the traveling of the conveyor. However, the blank sheet could not be delivered and could not cope with high speed.

  That is, the present invention has been proposed to solve the above-mentioned problems inherent in the prior art, and it is proposed that the blank sheets taken out from the sheet magazine are continuously delivered to the conveyor. An object of the present invention is to provide a blank sheet supply device capable of high-speed processing.

In order to overcome the above-mentioned problems and achieve the intended purpose suitably, the blank sheet supply apparatus according to the present invention comprises:
A blank sheet supply device that takes out the blank sheets stacked in the sheet magazine and folds them into a semi-boxed state,
Sheet transfer means for sucking the blank sheets taken out from the sheet magazine one by one with suction means and transferring them to a lower conveyor;
Adsorbs bottom wall in the blank sheet placed by said sheet transport means, the transfer conveyor continuously conveys the front bent portion of the conveyance direction forward in L-shape is bent upward to continuously provided to the bottom wall A transfer conveyor,
And a fold member bending upward a blank sheet before you placed conveyor, along the fold lines of the front bent portion abuts against the blank sheet by the sheet transport means,
Each of the transfer conveyor is connected in series to the conveyor, and includes a transfer conveyor that continuously conveys the blank sheet held in a U shape with the upper opening between the support members before and after moving continuously in the conveying direction.
The transport surface of the transport conveyor is disposed in an inclined manner so that its upstream portion is located above the transport surface of the transfer conveyor and intersects the transport surface of the transfer conveyor on the downstream side,
When you transfer a blank sheet at the inclined intersections of the conveyor and the transfer conveyor, adsorbed in a conveyor front bent portion which is bent to the upward it is brought into contact with the preceding support member of the transfer conveyor blank The rear folding portion is folded upward along the folding line with the subsequent support member while the sheet is transferred, and the blank sheet is configured to be held and conveyed in a U-shape with the upper opening between the support members. It is characterized by that.

According to the blank sheet supply apparatus of the first aspect of the present invention, the blank sheet can be continuously delivered without stopping the transfer conveyor, and the blank sheet can be connected to the transfer conveyor connected in series with the continuously running transfer conveyor. An apparatus capable of achieving high-speed processing can be obtained with a simple configuration that only feeds the. In addition, since the upstream portion of the conveyor is located at the upper side and is arranged in an inclined shape so as to intersect the transfer conveyor on the downstream side, the blank sheet rear folding portion is provided when the blank sheet is delivered to the transfer conveyor. When folding with a subsequent support member, the timing of starting folding by the support member can be delayed to reduce the conveyance speed of the blank sheet. Therefore, it is possible to stably transfer the blank sheet and transfer the blank sheet from the transfer conveyor to the transfer conveyor even during high-speed processing. Further, according to the supply device according to claim 2, since the bottom wall is sucked and held when the blank sheet is semi-boxed at the suction port of the transport conveyor, the delivery and transfer from the transport conveyor to the transfer conveyor are performed. It is possible to reliably fold the rear folding portion of the sheet on the conveyor.

According to the supply apparatus which concerns on Claim 3 , a blank sheet can be firmly hold | maintained and conveyed at 3 points | pieces by the 1st and 2nd adsorption conveyor. In addition, since the transfer speed of the first suction conveyor in the transfer conveyor is set higher than the transfer speed of the transfer conveyor, the front bent portion is pressed against the preceding support member when the blank sheet is transferred from the transfer conveyor to the transfer conveyor. And can be suitably folded. Furthermore, when folding the rear folded portion of the blank sheet, two points in the left-right direction of the blank sheet are sucked by the second suction conveyor, so that good folding is achieved.

According to the supply device of the fourth aspect , since a plurality of suction means of the sheet transfer means are provided, it is possible to cope with high speed processing. Further, according to the supply device according to the fifth aspect , the blank sheet stacked in an upright state is taken out and converted by the posture changing mechanism into a posture in which the inner inner surface is directed upward at the time of box making, and thus added during the transfer. The blank sheet is prevented from being displaced or peeled off by the wind pressure.

Further, according to the supply device according to claim 6 , by releasing the suction holding of the blank sheet before it is delivered to the transport conveyor, it is possible to prevent a delivery failure due to a delay in releasing the holding of the blank sheet due to the residual pressure at the time of delivery. . Further, at that time, the blank sheet is pressed against the transport surface of the transport conveyor by the suction means, so that good delivery to the conveyor is achieved.

According to the supply device of the seventh aspect , when the blank sheet separated from the suction means is delivered to the transport conveyor, the restriction member can prevent the sheet from moving to the upstream side due to inertia, and can always be A blank sheet can be placed at a predetermined position. Moreover, according to the supply apparatus which concerns on Claim 8 , since the auxiliary | assistant bending member which presses a blank sheet with respect to the conveyance surface of a conveyance conveyor was provided in the case of delivery to a conveyance conveyor, an adsorption | suction means is taken from the pressed blank sheet. The blank sheet can be satisfactorily separated and transferred successfully to the conveyor.

  Next, the blank sheet supply apparatus according to the present invention will be described below with reference to the accompanying drawings by citing preferred embodiments. For convenience of explanation, “left and right” refers to a direction that intersects the feeding direction of the blank sheet in the sheet magazine.

  As shown in FIG. 1, a wraparound type caser 10 (hereinafter referred to as a caser) employing a supply device according to an embodiment includes a sheet magazine 12 in which a plurality of blank sheets 11 made of cardboard are stacked in an upright posture. Prepare. The sheet magazine 12 is provided with a sheet feeding means 17 provided with two conveying shafts 16 and 16 (only one of which is shown) placed on the blank sheet 11 in an upright posture and spaced in parallel in the left-right direction. The transport shafts 16 and 16 are continuously rotated in one direction by corresponding drive motors 18 and 18 (only one is shown). Each conveyance shaft 16 is formed with a spiral groove in a direction for propelling the blank sheet 11 placed by the rotation toward the take-out port of the sheet magazine 12. The sheet group is sent to the downstream side, and the leading blank sheet 11 is taken out at the outlet.

  The blank sheet 11 is stacked on the sheet magazine 12 in such a posture that the inner inner surface when facing the box is directed to the take-out port side, and the inner surface is sucked and held by a sheet transfer means 23 described later and taken out from the take-out port. It has become so. In addition, as shown in FIG. 4, the blank sheet 11 has a bottom wall 11 a serving as a bottom surface when semi-boxed into a U shape with an open top surface, and a front side (downstream side) in the transport direction on the transport conveyor 14. ) And the rear bent portion 11c located on the rear side are connected to each other, and are defined by a front bent line 11d and a rear bent line 11e extending in the left and right width directions, respectively. The sheet magazine 12 is laminated so that the front bent portion 11b is positioned on the upper side (see FIG. 3).

  A shutter 19 for separating the leading blank sheet 11 and the succeeding blank sheet 11 taken out from the take-out port is arranged at the front end facing the take-out port in each transport shaft 16 so as to rotate integrally with each other. It is installed. Each shutter 19 is formed in a disk shape having a diameter larger than that of the conveying shaft 16 and is configured to support a lower end side corner portion of the leading blank sheet 11 facing the takeout port at a portion protruding in the radial direction from the shaft 16. The Each shutter 19 is formed with a not-shown notch, and when the notch comes to a separation position corresponding to the lower edge of the blank sheet 11, the sheet 11 is allowed to pass (take out). Configured to do. The shutter 19 is set to rotate once in correspondence with the operation of taking out the blank sheets 11 one by one by the sheet transfer means 23.

  A support tool 20 (only the upper support tool is shown) is provided at the upper and left and right sides of the take-out port of the sheet magazine 12, and is placed on the transport shafts 16 and 16 and has a lower corner portion. The upper end portion and the left and right end portions of the leading blank sheet 11 that are supported by the shutters 19 and 19 are supported by these supporting tools 20, and the leading blank sheet 11 facing the take-out port has the upper end thereof. It is set to be in a state tilted forward in the feed direction. The left and right ends of the blank sheet group fed by the sheet feeding means 17 are guided and aligned by guides (not shown) disposed in the sheet magazine 12 and extending along the feeding direction. Yes.

  An auxiliary separating device 21 for separating the upper end portion of the leading blank sheet 11 from the succeeding blank sheet 11 is disposed above the take-out opening in the sheet magazine 12. The auxiliary separation device 21 includes a suction cup 21a connected in communication with a vacuum suction means (not shown), and moves the suction cup 21a forward and backward with respect to the blank sheet 11, so that the leading blank sheet 11 sucked and held at the time of advancement. Is configured to be separated from the subsequent blank sheet 11 when retreating.

  As shown in FIG. 1 and FIG. 3A, the sheet transfer means 23 is attached to a plurality of suction members via attachment members 27 at both ends in the longitudinal direction of an arm 26 as a rotating body that is turned by a posture changing mechanism 24. Each of the suction heads 22 as a suction means provided with a cup 28 is provided, and each suction head 22 is configured to suck and take out the blank sheets 11 one by one from the sheet magazine 12. As shown in FIG. 3 (b), the suction head 22 has two suctions for sucking the rear bent portion 11 c at two positions separated in the left-right direction in a posture for sucking the blank sheet 11 as shown in FIG. Three suction cups 28 including a cup 28, 28 and a suction cup 28 disposed at a position where the bottom wall 11 a can be sucked at the center in the left-right direction are disposed, and the blank sheet 11 is moved by these three suction cups 28. It comes to adsorb. Each suction cup 28 provided at each end of the arm 26 is disposed on the mounting member 27 with the suction hole 28a facing outward from each end of the arm 26. The leading blank sheet 11 located at the take-out port of the sheet magazine 12 is configured to be able to suck and hold the substantially central portion in the left-right direction. Each suction cup 28 is connected to a vacuum suction means (not shown), and the suction means is set to perform suction holding and suction release of the blank sheet 11 by each suction cup 28 by ON-OFF control at an appropriate timing. It is. In the embodiment, the vacuum suction unit is turned off at the timing before the blank sheet 11 taken out from the sheet magazine 12 by the sheet transfer unit 23 reaches the delivery position to be delivered to the transport conveyor 14, the suction is released, and the transport is performed. The delivery to the conveyor 14 can be performed smoothly. Further, the vacuum suction means is turned ON at an appropriate timing until the suction head 22 returns from the delivery position to the position where the blank sheet 11 is taken out from the sheet magazine 12, and the blank sheet 11 is reliably sucked and held when the sheet is taken out. To get. Note that the number of suction heads 22 disposed on the arm 26 is not limited to two depending on the size of the blank sheet 11 to be used. A suction head 22 may be provided. Further, the number and position of the suction cups 28 constituting the suction head 22 are not limited to three, and can be appropriately changed according to the shape and size of the blank sheet 11.

  As shown in FIG. 3, the posture changing mechanism 24 is disposed on one side (right side in FIG. 3) of the machine frames 29 and 29 spaced apart from each other and extends inward (the side facing the other machine frame side). The first holder 30 is provided with a rotary shaft 31 that is rotatably arranged. The second holder 32 that is fixed to the inner shaft end of the rotary shaft 31 and rotates is eccentric to the rotary shaft 31. A support shaft 33 extending parallel to the position is pivotally supported. Further, a toothed belt 36 is wound between a first toothed pulley 34 which is a fixed pulley disposed in the first holder 30 and a second toothed pulley 35 which is a planetary pulley fixed to the support shaft 33. A variable speed motor 37 such as a servo motor disposed outside the machine frame 29 is connected to the rotary shaft 31 via a transmission means 38 such as a belt-pulley. The support shaft 33 is configured to revolve while rotating around the rotation shaft 31 by rotating the rotation shaft 31 in a predetermined direction by the variable speed motor 37. That is, in the embodiment, the posture changing mechanism 24 is constituted by the rotating shaft 31, the support shaft 33, the first toothed pulley 34, the second toothed pulley 35, the toothed belt 36, the variable speed motor 37, and the transmission means 38.

  The arm 26 is fixed to the inner shaft end of the support shaft 33 at a substantially middle portion in the longitudinal direction so as to rotate integrally. The suction heads 22 of the arms 26 swung by the posture changing mechanism 24 are arranged so that the suction holes 28a of the suction cups 28 are in the substantially horizontal posture when the sheets are taken out, and the heads facing the take-out ports in the sheet magazine 12 are exposed. After the bottom wall 11a and the rear bent portion 11c of the inner surface of the blank sheet 11 are sucked (see FIG. 3B), the suction cup 28 is gradually changed in posture so that the suction hole 28a faces downward. The blank sheet 11 that is sucked and held by the suction head 22 and taken out from the sheet magazine 12 is traced so that the lower end side thereof is lifted slightly upward to be rolled up. After being removed from the lower end of the sheet and taken out from the take-out port, the suction sucking the blank sheet 11 as it is moved downward. The suction hole 28a of the landing cup 28 is gradually lowered to change its posture so that the inner surface (surface to be sucked by the suction cup 28) of the blank sheet 11 faces upward and is moved downward. Yes.

  Further, when the blank sheet 11 is sucked and held by the suction head 22 and transferred from the upper downstream side to the upstream side of the transport conveyor 14 and arrives at the delivery position and is placed on the transport conveyor 14, suction is performed. The movement trajectory of the suction head 22 moved by the posture changing mechanism 24 is set so that the suction cup 28 of the head 22 presses the blank sheet 11 toward the transport surface of the transport conveyor 14.

  As shown in FIG. 3A, the arm 26 is provided with a pair of auxiliary bending members 39, 39 that are spaced apart from each other in parallel to the suction heads 22. , 39 are configured to pivot integrally with the arm 26. The auxiliary folding members 39, 39 are arranged so that the outer surface of the blank sheet 11 sucked and held by the suction head 22 (the outer surface when boxed) comes into contact with the bending member 25. 11 is positioned so as to support the suction portion side by the suction head 22 in the vicinity of the front fold line 11d formed between the bottom wall 11a of the head 11 and the front fold portion 11b, and the blank sheet 11 is bent. It works to make it work well. Further, when the blank sheet 11 is delivered to the transport conveyor 14, by pressing the suction site side near the fold line 11d in the blank sheet 11 from the inner surface to the conveyor transport surface by the auxiliary folding members 39, 39, Thereafter, the suction cup 28 is pulled away from the pressed blank sheet 11 by turning the arm 26, and the blank sheet 11 is reliably separated from the suction head 22. In addition, the front-end | tip which supports the blank sheet 11 in the auxiliary bending member 39 is formed in circular arc shape, and it is comprised so that the blank sheet 11 may not be damaged.

  Between the machine frames 29 and 29 that are separated from each other on the left and right, below the sheet magazine 12, to the downstream side in the conveying direction by the conveying conveyor 14 from the arrangement position of the sheet transfer means 23, to the upstream side in the conveying direction. A pair of endless chains (endless cords) 40 that are wound around a first sprocket 40a located downstream and a second sprocket 40b located above the first sprocket 40a on the downstream side and travel along the conveying direction; 40 (only one is shown) is spaced apart in the left-right direction. The both endless chains 40, 40 travel downward toward the first sprocket 40a on the upper travel path by a variable speed motor 41 such as a servo motor disposed in one machine casing 29, Is circulated at a speed synchronized with the sheet transfer means 23 and the conveyor 14 so as to travel upward toward the second sprocket 40b. Between the endless chains 40, 40, a plurality of rod-like bending members 25 (four in the embodiment, but may be any other number) spaced apart from each other by a predetermined distance in the running direction, It is constructed so as to extend in parallel with the left-right width direction of the blank sheet 11 transferred by the sheet transfer means 23, and the folding member 25 moves in a predetermined direction by the travel of the endless chains 40, 40. .

  That is, the bending member 25 is set so that the upper straight portion moves downward so as to be close to the sheet transfer means 23 and the lower straight portion moves upward so as to be separated from the sheet transfer means 23. A part of the movement trajectory of the folding member 25 is set so as to be positioned within the transfer trajectory of the blank sheet 11 that is sucked and held by the sheet transfer means 23 and transferred. An outer surface (surface facing downward) corresponding to the portion 11 b is configured to abut on the bending member 25. Further, when the bending member 25 supporting the front bent portion 11b of the blank sheet 11 moves on the lower straight portion, the bending member 25 moves downstream from the support position with respect to the front bent portion 11b. By gradually moving upward while changing to the side, when the blank sheet 11 delivered to the transport conveyor 14 is transported to the downstream side by a predetermined distance, the support is released away from the front bent portion 11b. It is configured as follows. The folding member 25 moving on the lower straight portion is synchronized with the speed of the conveyor 14 so that the folding angle of the front folding portion 11b of the blank sheet 11 with respect to the bottom wall 11a is small. It is set to move downstream.

  As shown in FIGS. 1 and 2, the front bent portion 11 b is bent upward by the bending member 25 at a predetermined position upstream of the conveying conveyor 14 disposed below the sheet transfer means 23. The blank sheet 11 having a substantially L-shape is delivered from the transfer means 23. The transport direction of the transport conveyor 14 is set to be opposite to the feed direction of the blank sheet 11 in the sheet magazine 12.

  As shown in FIG. 4, the transport conveyor 14 includes a first suction conveyor 42 and a pair of second suction conveyors 43, 43 arranged in parallel on both the left and right sides of the first suction conveyor 42. The first suction conveyor 42 is configured by winding a first suction belt 45 between a pair of first pulleys 44, 44 that are separated from each other in the transport direction. The first suction belt 45 is provided with a plurality of first suction ports (suction ports) 45a each having a plurality of openings at a predetermined interval in the running direction, and an upper runway (blank sheet) in the first suction belt 45 is provided. The first suction chamber 46 connected to a suction source (not shown) is in contact with the lower surface side of the transport surface (11 transport surface), and through a through hole (not shown) on the upper surface of the first suction chamber 46 and the first suction port 45a. The central portion in the width direction of the outer surface of the blank sheet 11 is sucked and held on the belt upper surface (conveying surface) by the acting suction force. In addition, the area | region where each 1st suction port 45a is formed is set shorter than the length of the conveyance direction in the bottom wall 11a of the said blank sheet 11, and conveyance of the blank sheet 11 delivered from the said sheet | seat conveyance means 23 is carried out. The first suction belt 45 of the first suction conveyor 42 is a blank sheet formed by the sheet transfer means 23 so that the bottom wall 11a that is a part of the placement surface for the conveyor 14 is placed on the first suction port 45a. 11 is set to run at a predetermined speed by a drive motor (not shown) in synchronization with the delivery cycle of No. 11, and the first suction conveyor 42 sucks and holds the bottom wall 11a of the blank sheet 11 and conveys it downstream. .

  The upper runway for transporting the blank sheet 11 in the first suction belt 45 extends downstream from the delivery position of the blank sheet 11 from the sheet transfer means 23 by a predetermined length, and as shown in FIG. The blank sheet 11 is inclined so that the upstream portion is upward, and the blank sheet 11 transferred from the upper side on the downstream side in the conveying direction is shifted to the upstream side by the turning of the arm 26 when the blank sheet 11 is transferred from the sheet transfer means 23. Can be suppressed. In addition, a regulating member 47 formed in an inverted L shape at the upstream end of the first suction conveyor 42 has a receiving portion 47a extending in the transport direction at substantially the same level as the upper runway in the first suction belt 45. The restricting piece 47b extending in the vertical direction from the upstream end thereof is arranged in a posture to rise upward. And it is comprised so that the upstream edge part of the blank sheet 11 delivered to the conveyance conveyor 14 from the sheet | seat conveyance means 23 may be controlled by the control pieces 47b and 47b from shifting to the upstream side by inertia. A notch 47c is formed in the center of the receiving portion 47a in the width direction so as not to interfere with the first suction belt 45.

  Each of the second suction conveyors 43 is spaced apart from the first suction conveyor 42 by a predetermined distance in the width direction, and a second suction belt 49 is wound between a pair of second pulleys 48 and 48 that are spaced forward and backward in the transport direction. The second suction belt 49 is continuously driven by a drive motor (not shown) so that the second suction belt 49 circulates in parallel with the first suction belt 45 at a predetermined speed. That is, the upper runway (the conveyance surface of the blank sheet 11) in the second suction belt 49 is inclined so that the upstream portion is upward, like the first suction belt 45. The upstream end serving as the transport start end of the second suction conveyor 43 is set upstream from the upstream end of the transfer conveyor 15 and downstream from the delivery position of the blank sheet 11 to the transport conveyor 14. First, it is sucked and held on the first suction conveyor 42 and conveyed. The upper runway in the second suction belt 49 is set at the same level as the upper runway of the first suction belt 45, and the bottom wall 11 a and the rear bent portion of the blank sheet 11 conveyed by the first suction conveyor 42. The vicinity of the end in the width direction of 11c is placed. The second suction belt 49 is provided with a plurality of second suction ports (suction ports) 49a each having a plurality of openings at a predetermined interval in the running direction, and on the lower surface side of the upper runway in the second suction belt 49. The second suction chamber 50 connected to a suction source (not shown) is in contact with the upper surface of the belt (conveyance) by a suction force acting via a through hole (not shown) on the upper surface of the second suction chamber 50 and the second suction port 49a. Surface) is configured to suck and hold one end portion in the width direction on the outer surface of the blank sheet 11. The area | region where each 2nd suction port 49a in the 2nd suction belt 49 is formed is set shorter than the length of the conveyance direction in the bottom wall 11a of the blank sheet 11 similarly to the said 1st suction port 45a. The second suction belt 49 of the second suction conveyor 43 is the first suction conveyor 42 so that the bottom wall 11a of the blank sheet 11 conveyed by the first suction conveyor 42 is placed on the second suction port 49a. It is set to run in synchronization with the suction belt 45, and the second suction conveyor 43 sucks and holds the bottom wall 11a of the blank sheet 11 and conveys it to the downstream side.

  The downstream part of the upper runway of the first and second suction belts 45 and 49 is set to be located downstream from the upstream end of the transfer conveyor 15 and below the transfer surface of the transfer conveyor 15, and will be described later. In the region where the rear bent portion 11 c of the blank sheet 11 is bent upward by the members 53 and 54, the conveyance surface of the second suction belt 49 is positioned above the conveyance surface of the transfer conveyor 15. . That is, when the rear bent portion 11c of the blank sheet 11 is bent upward by the support members 53, 54, the bottom wall 11a of the blank sheet 11 is moved by the first and second suction belts 45, 49, 49. Adsorption is held at a total of three points, that is, the center and the position separated in the left-right direction, so that the bending can be performed satisfactorily. Note that the through hole on the upper surface of the first suction chamber 46 is not provided on the downstream side of the region where the rear bent portion 11c is bent upward, and the blank sheet 11 is located downstream of the second suction belt. 49, 49 is configured to be sucked and held and transported.

  Between the first suction conveyor 42 and each second suction conveyor 43, a transfer conveyor 15 comprising a pair of conveyors 15a and 15b that receive the blank sheet 11 from the transfer conveyor 14 and transfer it further downstream is disposed. Yes. The transfer conveyor 15 includes a pair of endless chains (endless cords) 52 and 52 that run in parallel, and a plurality of support members 53 and 54 that are disposed at predetermined intervals in the running direction (conveying direction) of each endless chain 52. The endless chains 52, 52 traveling on the upper travel path (the conveyance surface of the blank sheet 11) are guided by a guide plate 55 disposed horizontally below the endless chains 52, 52 and travel horizontally. Yes. The support members 53, 54 disposed on the endless chains 52, 52 are disposed in a staggered relationship with respect to the traveling direction, and the interval is upward from the bottom wall 11 a of the blank sheet 11. The size is set such that the bent front and rear bent portions 11b and 11c can be supported and transported from the front and rear. And in the transfer conveyor 15 of an Example, as shown in FIG. 4, both the left and right sides of the blank sheet 11 in a folded state are supported by inner support members 53, 15 by both conveyors 15a, 15b continuously driven by a drive motor (not shown). 53 and the outer support members 54, 54 are configured so as to be held in front and rear in a U-shape that opens upward and horizontally transferred downstream.

  The upstream end of the transfer conveyor 15 is located upstream from the downstream end of the second suction conveyor 43, and the upper travel path is a transport surface (suction belt 45) of the transport conveyor 14 as shown in FIG. , 49 is set to be located below the upper runway), and the support members 53, 54 that move the upstream turning portion of the transfer conveyor 15 from the lower side to the upper side are transported by the transfer conveyor 14 to the blank sheet 11 It is comprised so that it may contact | abut from the lower side with respect to the back bending part 11c, and this may be bent upward along the said back bending line 11e.

  Here, the transport speed of the first suction conveyor 42 in the transport conveyor 14 is set to be higher than the transport speed of the transfer conveyor 15, and the blank sheet 11 is being transported while being suction-held by the first suction conveyor 42. The front bent portion 11b is configured to be pressed upward from the rear side against the preceding support members 53 and 54 of the transfer conveyor 11 so as to be bent further upward. The transport speed of the second suction conveyors 43 and 43 is set to be lower than the transport speed of the first suction conveyor 42 and substantially the same as or slightly higher than the transport speed of the transfer conveyor 15. The delivery of the blank sheet 11 can be performed smoothly.

(Effects of Example)
Next, the operation of the blank sheet supply apparatus according to the above-described embodiment will be described.

  The sheet transfer means 23 that adsorbs the leading blank sheet 11 stacked in a posture in which the plurality of blank sheets 11 are placed so that the inner surface that is the inner side when the box is formed is directed to the take-out side. As shown in FIG. 1, the suction head 22 moves away from the take-out port and moves away from the lower end of the subsequent blank sheet 11 so that the lower end of the leading blank sheet 11 is rolled upward. Is done.

  Thereafter, the suction head 22 of the sheet transfer means 23 moves downward, and accordingly, the blank sheet 11 taken out from the sheet magazine 12 is transferred downward. At this time, the postures of the suction cups 28 of the suction head 22 are changed by the posture changing mechanism 24 so that the suction holes 28a gradually become downward from a substantially horizontal posture while being separated from the sheet magazine 12. . That is, the blank sheet 11 sucked and held on the suction head 22 by the suction cup 28 is transferred downward with the inner surface facing upward. Accordingly, the wind pressure when being sucked and held by each suction cup 28 of the suction head 22 and transferred downward is applied upward to the outer surface opposite to the inner surface of the blank sheet 11, and the sheet 11 is moved to each suction cup. It acts to press toward the suction direction of the 28 suction holes 28a, and the blank sheet 11 is prevented from being displaced or separated from the suction holes 28a during transfer.

  While the posture of the blank sheet 11 sucked and held by the suction head 22 is gradually changed downward and transferred toward the transport conveyor 14 (until placed on the transport conveyor 14), The outer surface of the front bent portion 11b located on the front side in the transport direction across the front bend line 11d with the bottom wall 11a sucked and held by the suction head 22 has a full length in the left-right width direction on the bending member 25. As the blank sheet 11 is further moved downward, the front bent portion 11b is bent upward along the front folding line 11d (see FIGS. 1 and 2). At this time, the suction portion side of the suction head 22 in the vicinity of the front fold line 11d formed between the bottom wall 11a of the blank sheet 11 and the front fold portion 11b is the inner surface of the auxiliary fold members 39, 39. Even if the suction cup 28 is deformed, the blank sheet 11 is bent well. At this time, the bottom wall 11a serving as a suction portion of the blank sheet 11 is pressed toward the suction direction at the suction hole 28a in the suction cup 28 of the suction head 22, so that the blank sheet 11 is displaced from the suction head 22. The blank sheet 11 can be reliably transferred and bent without being peeled off.

  When the suction head 22 comes to a position before the delivery position of the blank sheet 11 to the conveyor 14, the vacuum suction means is turned off and the suction of the blank sheet 11 by the suction cup 28 is released. Thereby, when the blank sheet 11 arrives at the delivery position, the front folded portion 11b is bent upward at the upstream portion of the first suction conveyor 42 in the transport conveyor 14 in a non-suction state. It is delivered after being bent into a substantially L shape with the inner surface facing upward. That is, it is possible to prevent the holding release from being delayed due to the action of the residual pressure of the suction cup 28 and the blank sheet 11 from being transferred beyond a predetermined position of the conveyor 14. At this time, the auxiliary bending members 39, 39 are pressed against the transport surface of the transport conveyor 14 from the inner surface corresponding to the bottom wall 11 a of the blank sheet 11, so that the suction cup 28 is rotated by the subsequent turning of the arm 26. Is separated from the pressed blank sheet 11, and even if there is a slight residual pressure, the blank sheet 11 is reliably separated from the suction head 22, and the position of the transport conveyor 14 is shifted to a predetermined position. I can deliver it.

  Moreover, since the first suction conveyor 42 to which the blank sheet 11 is delivered on the transport conveyor 14 is inclined so that the upstream portion thereof is upward, the suction head 22 is moved by the rotation of the arm 26 in the sheet transfer means 23. When the blank sheet 11 is moved from above the downstream side of the conveyor 14 and delivered to the conveyor 14, the sheet 11 is moved upstream due to inertia when the blank sheet 11 is separated from the suction cup 28 of the suction head 22. Misalignment can be suppressed. Further, since the restriction member 47 is disposed on the upstream end side of the first suction conveyor 42, the position of the movement of the blank sheet 11 to the upstream side due to the inertia is reliably restricted by the restriction piece 47b of the restriction member 47. can do.

  The bottom wall 11a on the mounting surface of the blank sheet 11 delivered to the first suction conveyor 42 is attracted to the suction belt 45 by a suction force acting through the first suction port 45a of the first suction belt 45. Retained. At the time of delivery of the blank sheet 11 to the transport conveyor 14, the suction cup 28 of the suction head 22 presses the bottom wall 11a of the blank sheet 11 against the transport surface of the first suction belt 45 in the first suction conveyor 42. A suction force acts reliably on the bottom wall 11a through the first suction port 45a, and the central portion in the width direction of the bottom wall 11a is reliably sucked and held by the first suction belt 45.

  In the blank sheet 11 conveyed downstream with the bottom wall 11a adsorbed and held on the first adsorption conveyor 42, the blank sheet 11 is positioned at the front side in the conveyance direction and rises at a required folding angle with respect to the bottom wall 11a. The front bending portion 11b supported by the bending member 25 is configured so that the bending angle with the bottom wall 11a gradually increases as the bending member 25 moves downstream in synchronization with the transport conveyor 14. It is bent upwards to be smaller.

  In addition, the bottom wall 11a of the blank sheet 11 that is transported while the placement surface is sucked and held by the first suction conveyor 42 of the transport conveyor 14 travels on the upper runway in the second suction conveyors 43 and 43. 2 The outer surfaces of both end portions in the width direction corresponding to the bottom wall 11a are sucked and held by the second suction belts 49 and 49 by the suction force acting on the suction belts 49 and 49 through the second suction ports 49a and 49a. In the state, it is conveyed further downstream. That is, the mounting surface of the L-shaped blank sheet 11 delivered to the conveyor 14 is firmly held at three points by the first and second suction conveyors 42, 43, 43 on the bottom wall 11a, Stable conveyance is achieved.

  The bending member 25 supporting the front bent portion 11b of the blank sheet 11 conveyed by the conveyor 14 moves gradually from the front bent portion 11b while moving to the downstream side. Release support at a distance. In addition, the front bent portion 11b of the blank sheet 11 on the way of being conveyed by the conveyor 14 is the preceding inner support member 53, 53 or outer support that is continuously moving on the upper traveling path in the transfer conveyor 15. Supported by the members 54, 54, the blank sheet 11 is maintained in an L-shaped bent state. As described above, the transport speed of the first suction conveyor 42 in the transport conveyor 14 is set to be higher than the transport speed of the transfer conveyor 15, so that the front folding of the blank sheet 11 sucked and transported by the first suction conveyor 42 is performed. The bent portion 11b is pressed against the preceding support members 53 and 53 or the support members 54 and 54, and is bent to a position where it rises substantially vertically upward from the transport surface of the transfer conveyor 15 (see FIG. 2). At this time, since the bottom wall 11a of the blank sheet 11 is firmly adsorbed and held at three points as described above, the bottom wall 11a is misaligned to cause a bending failure of the front bent portion 11b. Absent.

  The front bent portion 11b moves continuously with respect to the blank sheet 11 supported by the preceding support members 53, 53 or the support members 54, 54 so as to rise from the lower side to the upper side at the upstream turning portion. Subsequent supporting members 54 and 54 or supporting members 53 and 53 abut against the rear bent portion 11c located on the rear side of the bottom wall 11a from below and bend it upward along the rear folding line 11e. . At this time, the central portion of the bottom wall 11a of the blank sheet 11 is sucked and held by the first suction port 45a of the first suction conveyor 42, and left and right by the second suction ports 49a and 49a of the second suction conveyors 43 and 43. Since the two places separated in the direction are sucked and held, the rear bent portion 11c is reliably bent along the rear folding line 11e without the bottom wall 11a being displaced. When the subsequent support members 54 and 54 or the support members 53 and 53 completely move to the upper traveling path, the blank sheet 11 is moved to the preceding support member 53 or 53 or the support members 54 and 54 and the subsequent support member 54. , 54 or the support members 53, 53 are held in a U-shaped bent state opening upward. Further, the suction and holding of the bottom wall 11a of the blank sheet 11 by the first suction conveyor 42 is released, and the sheet 11 is in a state where the left and right ends of the bottom wall 11a are suctioned and held by the second suction conveyors 43 and 43. Be transported. After the bottom wall 11a of the blank sheet 11 is separated from the second suction conveyors 43, 43, the U-shaped semi-boxes in which the sheet 11 is opened upward by the support members 53, 54 before and after the transfer conveyor 15. It is held in a state and conveyed downstream. In addition, since the conveyance speed of the second suction conveyors 43 and 43 is set to be substantially the same as or slightly higher than the conveyance speed of the transfer conveyor 15 as described above, the blank sheet 11 is placed between the support members of the transfer conveyor 15. It can be smoothly transferred while maintaining a U-shaped state without slipping upward.

  That is, in the supply device of the embodiment, the blank sheet 11 taken out from the sheet magazine 12 and made into a semi-boxed state is once delivered to the transport conveyor 14 that is continuously driven, and is sucked and transported by the transport conveyor 14. Since the blank sheet 11 is delivered to the transfer conveyor 15, continuous sheet delivery can be performed without stopping the transfer conveyor 15, and high-speed processing can be handled. Further, since the upstream portion of the transfer conveyor 14 is inclined with respect to the transfer conveyor 15, the rear bent portion 11 c of the blank sheet 11 is folded by the subsequent support members 53 and 54. When bending, the timing at which the support members 53 and 54 protrude from the conveying surface and start bending can be delayed, so the conveying speed of the blank sheet 11 on the conveying conveyor 14 can be decreased. Accordingly, it is possible to stably deliver the blank sheet 11 from the sheet transfer means 23 to the transport conveyor 14 and transport the blank sheet 11 on the transport conveyor 14.

  Furthermore, in the embodiment, since the two suction heads 22 are provided on the swivel arm 26 of the sheet transport means 23 at a predetermined angle in the swivel direction, the blank sheet 11 is supplied from the sheet magazine 12 to the transport conveyor 14. The speed can be increased.

[Example of change]
The present application is not limited to the configuration of the above-described embodiment, and other configurations can be appropriately employed.
1. In the embodiment, the blank sheet 11 is sucked and taken out from the sheet magazine 12 by the suction cup 28 of the suction head 22 disposed on the swiveling arm 26 of the sheet transfer means 23. A configuration in which the blank sheet 11 is taken out by the suction cup 28 of the suction head 22 disposed on a swinging member that swings between the delivery position to the delivery position 14 can be adopted.
2. A toothed belt wound around a fixed pulley 34, a planetary pulley 35, and pulleys 34, 35 as a posture changing mechanism 24 for changing the posture of the suction head 22 as a suction means including the suction cup 28 in the embodiment. Although the planetary mechanism consisting of 36 is adopted, instead of a configuration in which a plurality of suction means are fixedly arranged at the end of the rotating body consisting of the other planetary gear mechanism or the arm 26 shown in the embodiment, for example, the suction means is provided on the rotating plate. A blank sheet is arranged when the blank sheet 11 is taken out, such as a plurality of the suction means arranged at predetermined intervals in the circumferential direction of the rotating plate so as to change the posture by rotating each suction means. As long as the suction hole 28a directed to the attracted surface 11 can be changed to a posture capable of delivering the blank sheet 11 to the transport conveyor 14, other mechanisms are employed. That.
3. In the embodiment, the bending member 25 is described as a movable type provided in the middle of the sheet transfer by the sheet transfer means 23. However, the folding member 25 is arranged in the transfer of the blank sheet 11 to the conveyor 14 by the sheet transfer means 23. The blank sheet 11 may be bent along the pre-bending line 11d by a fixed bending member provided, and the arrangement position is not particularly limited as long as it can be brought into contact with the sheet 11.
4. In the embodiment, a case has been described in which the transport conveyor 14 is configured by a plurality of suction conveyors 42, 43, 43. However, the number may be one or four or more. The second suction conveyors 43 and 43 may not be displaced in the transport direction .
5. In the embodiment, the holding conveyor 51 constituting the transfer conveyor 15 is composed of a pair of endless chains 52 and 52 in which support members 53 and 54 are disposed, but 1 in which the support members 53 and 54 are disposed. An endless chain may be used, and an endless belt or the like may be employed instead of the endless chain.

It is a front view which shows schematic structure of the wraparound type | mold caser which employ | adopted the supply apparatus which concerns on an Example. It is a schematic front view which shows the principal part of the supply apparatus which concerns on an Example. (a) is a schematic side view which shows the sheet | seat conveyance means based on an Example, (b) is explanatory drawing which shows the relationship between a blank sheet and the suction cup of a suction head. It is a schematic plan view which shows the conveyance conveyor and transfer conveyor which concern on an Example.

Explanation of symbols

11 Blank sheet, 11a Bottom wall (bottom surface), 11b Front fold part 11c Back fold part, 11d Front fold line (fold line), 11e Back fold line (bend line)
12 sheet magazine, 14 transport conveyor, 15 transfer conveyor, 15a conveyor 15b conveyor, 22 suction head (suction means), 23 sheet transfer means 25 folding member, 26 arm (rotating body), 28a suction hole, 39 auxiliary folding member 42 first suction conveyor, 43 second suction conveyor, 45 first suction belt 45a first suction port (suction port), 47 regulating member, 49 second suction belt 49a second suction port (suction port), 51 holding conveyor, 53 Support member, 54 Support member

Claims (8)

A blank sheet (11) supply device for taking out a blank sheet (11) laminated on a sheet magazine (12) and folding it into a semi-boxed state,
A sheet transfer means (23) for sucking the blank sheets (11) picked up one by one from the sheet magazine (12) by the suction means (22) and transferring them to the lower conveyor (14);
Adsorbing bottom wall (11a) in placed on blank sheet (11) by said sheet transport means (23), the front bent portion of the conveyance direction forward to continuously provided in the bottom wall (11a) and (11b) above Conveying conveyor (14) that is continuously conveyed in an L-shape bent into a transfer conveyor (15) ;
Said sheet transport means (23) blank sheet (11) in until you placed conveyor (14), the front bent portion abuts against the blank sheet (11) (11b) of the fold line (11d ) Bending member (25) bent upward along
The blank sheet (11) is connected in series to the transport conveyor (14) and continuously moved while being separated in the transport direction before and after the support member (53, 54). Each with a transfer conveyor (15)
The transport surface of the transport conveyor (14) is disposed in an inclined manner so that its upstream portion is located above the transport surface of the transfer conveyor (15) and intersects the transport surface of the transfer conveyor (15) on the downstream side. And
When you transfer a blank sheet (11) in the inclined intersections of the conveyor (14) and the transfer conveyor (15), the front bent portion which is bent to the upper (11b) of the transfer conveyor (15) While the blank sheet (11) adhering to the preceding support member (53, 54) and adsorbed by the conveyor (14) is transported, the rear bent portion (11c) is folded by the subsequent support member (54, 53). The blank sheet (11) is folded upward along the bend line (11e), and is configured to be conveyed while being held in a U-shape with the upper opening between the support members (53, 54). Blank sheet feeder. The transport conveyor (14) includes a suction belt (45, 49) having a plurality of suction ports (45a, 49a) arranged at predetermined intervals in the running direction, and a blank at each suction port (45a, 49a). Each of the bottom walls when the sheet (11) is semi-boxed in a U-shape is adsorbed, and the blank sheet (11) is held at predetermined intervals and conveyed toward the transfer conveyor (15). The blank sheet supply device according to claim 1. It is located between a pair of transfer conveyors (15a, 15b) that constitute the transfer conveyor (15) apart in a direction crossing the transfer direction, and adsorbs the blank sheet (11) received at the transfer position to transfer the transfer conveyor ( 15) The first suction conveyor (42) to be transported to the left and the left and right sides sandwiching both transfer conveyors (15a, 15b), the first suction conveyor (42) has its transport start set downstream and is blank sheet The transport conveyor (14) is composed of a pair of second suction conveyors (43, 43) that suck and transport (11) to the transfer conveyor (15),
Together with the conveying speed of the first adsorption conveyor (42) is set faster than the conveying speed of the transfer conveyor (15), the conveying speed of the second adsorption conveyor (43) than the conveying speed of the first adsorption conveyor (42) Set at a low speed and substantially the same as or slightly higher than the transfer speed of the transfer conveyor (15) ,
The front folding portion (11b) that comes into contact with the folding member (25) during the conveyance of the blank sheet (11) on the conveyance conveyor (14) is configured to be bent into an L shape,
The second adsorption conveyor (43, 43) is a blank sheet (11) according to claim 1 or 2 configured so as to extend from the folding is located in an L-shape to the blank sheet transfer position to the transfer conveyor (15) The blank sheet supply apparatus described. A plurality of the suction means (22) are arranged at a predetermined angle toward the turning direction of the rotating body (26), and each suction means (22) is turned into a sheet magazine (12) along with the turning of the rotating body (26). The blank sheet supply device according to any one of claims 1 to 3 , wherein the posture is changed so that the blank sheet (11) taken out can be placed on the conveyor (14). In the sheet magazine (12), the blank sheet (11) is stacked in a posture in which the inner surface which is the inner side during the box making stands up toward the take-out port side, and the sheet transfer means (23) is a leading blank sheet After the inner surface in (11) is sucked and taken out from the sheet magazine (12), the posture is changed so that the posture is gradually changed so that the inner surface is placed on the transport conveyor (14) in a posture in which the inner surface faces upward. The blank sheet supply apparatus according to any one of claims 1 to 4 , further comprising (24). At the timing before the blank sheet (11) reaches the delivery position to the conveyor (14), the suction of the blank sheet (11) by the suction means (22) is released, and the blank sheet (11) is transferred to the conveyor (14). 6) The blank sheet supply device according to claim 5 , wherein the blank sheet (11) is pressed against the transport surface of the transport conveyor (14) by the adsorbing means (22) when the sheet is delivered. The blank sheet (11) is transported so as to descend from the upstream side toward the upstream side in the transport direction of the transport conveyor (14) and is configured to reach the delivery position, and is placed on the transport conveyor (14) at the delivery position. The blank sheet supply apparatus according to claim 5 or 6, further comprising a regulating member (47) for regulating the upstream movement of the blank sheet (11) to be moved. When transferring the blank sheet (11) to the transport conveyor (14), the sheet transfer means (23) has an inner surface on the suction site side in the suction means (22) in the vicinity of the fold line (11d). The apparatus for supplying a blank sheet according to any one of claims 5 to 7 , further comprising an auxiliary bending member (39, 39) that presses against a conveying surface of the conveying conveyor (14).

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