JP5081703B2 - Sheet workpiece feeding method and feeding apparatus - Google Patents

Description

  The present invention relates to a feeding method and a feeding device for a sheet-like workpiece such as cardboard.

  A sheet-like work printing device such as a corrugated cardboard is a sheet-feeding device that feeds the lowermost sheet-like workpiece of the stacked sheet-like workpieces to a feed roller, a feed roller that sends the sheet-like workpiece to the printing unit, and a sheet-like workpiece And a printing unit that prints on the work, and prints the sheet-like work accurately and at high speed. Therefore, the sheet workpiece feeding device is required to quickly feed the sheet workpiece from the preset reference position toward the feed roller. Sheet-like workpieces such as corrugated cardboard have various sizes and various different materials depending on applications.

  2. Description of the Related Art Conventionally, a sheet-like workpiece (corrugated cardboard sheet) feeding device includes a plurality of sheet feeding rollers that feed a lowermost sheet-like workpiece among the stacked sheet-like workpieces to the feed roller side, and a protruding amount with respect to the plurality of sheet feeding rollers Is adjusted by moving up and down to form a grate that adjusts the contact and separation between the feed roller and the lowermost sheet-like workpiece, and a gate (gap) for feeding only the lowermost sheet-like workpiece to the feed roller side. Front gauge.

The sheet-like workpiece feeding device described in Patent Documents 1 and 2 has a grate that adjusts the contact and separation between the lowermost sheet-like workpiece of the stacked sheet-like workpieces and the sheet feeding roller. As a result, the lowermost sheet-like workpiece and the paper feed roller are brought into contact with each other, the paper feed roller rotates, and the lowermost sheet-like workpiece and the paper feed roller are brought into contact with each other by the frictional force between the lowermost sheet-like workpiece and the paper feed roller. It is structured to feed to the feed roller side (hereinafter referred to as the “grate method”). In this great sheet-type workpiece feeding device, intermittent driving is performed to stop the driving of the paper feed roller each time the lowermost sheet-like workpiece is fed. The sheet-like workpiece feeding device described in Patent Documents 1 and 2 has a structure in which a paper feed roller is intermittently driven by a mechanical mechanism using a combination of gears. In the sheet-like workpiece feeding device described in Patent Documents 3 and 6, the outer periphery of the paper feed roller has a contact portion that can contact the lowermost sheet-like workpiece and a notch that cannot contact the lowermost sheet-like workpiece. A sheet-like workpiece feeding device is disclosed in which the lowermost sheet-like workpiece is fed to the printing unit side by rotating the paper feed roller while the lowermost sheet-like workpiece is sucked by the suction means. Yes. The applicant of the present application has already filed an application for feeding a sheet-like workpiece that controls the front gauge while arranging independent drive motors for a plurality of paper feed rollers (Patent Documents 4 and 5).
US Pat. No. 5,184,811 Japanese Patent No. 3784506 JP-A-9-156785 Japanese Patent Application No. 2007-193857 Japanese Patent Application No. 2007-278456 US Pat. No. 4,045,015

  In the great-type feeding device described in Patent Documents 1 and 2, in order to feed the lowermost sheet-like workpiece by bringing the sheet feeding roller into contact with the lowermost sheet-like workpiece, the lowermost sheet-like workpiece is placed on the great side. In the vacuum suction state, the grate must be lowered from the upper surface of the paper feed roller, but when the lowermost sheet-like workpiece is delivered, the sheet-like workpiece to be sent next (hereinafter referred to as the lower workpiece) The second sheet-shaped workpiece from the bottom and the second sheet-shaped workpiece from the bottom are continuously fed to the feed roller side. Trouble phenomenon (hereinafter referred to as “bringing phenomenon”) may occur. This entrainment phenomenon is remarkable when the laminated sheet-like workpieces are thin and soft. In order to prevent this entrainment phenomenon, it is necessary to raise the grate and separate the second sheet-like workpiece from the bottom from the paper feed roller. That is, in order to realize a high speed of feeding the sheet-like workpiece, in addition to shortening the feeding acceleration time per sheet-like workpiece, it is necessary to speed up the raising timing for raising the great.

  However, if the rising timing of the grate is accelerated, the grate starts to rise before the lowermost sheet-like workpiece is pulled out of the sheet-like workpiece feeding device by the feed roller. The sheet-like workpiece is pulled out while being bent for a long period between the rising grate and the lower end of the front gauge. At this time, the pressure applied by the remaining sheet is applied to the lowermost sheet-like workpiece. That is, the load of the stacked sheet-like workpieces is applied from above, and the vacuum suction force from the suction means is applied from below. As a result, a defect phenomenon (hereinafter referred to as choke phenomenon) occurs in which the tip of the lowermost sheet-like workpiece is bent and is sandwiched between the front gauges. When this choke phenomenon occurs, the resistance value for pulling out the lowermost sheet-like workpiece increases, and the feeding of the lowermost sheet-like workpiece is braked just before the lowermost sheet-like workpiece is delivered, There is a delay in the delivery timing of the lowermost sheet-like workpiece. The amount of delay (shift amount) in the feeding timing of the lowermost sheet-like workpiece due to the choke phenomenon is affected by the load of the sheet-like workpiece loaded thereon. That is, when the remaining number of the stacked sheet-like workpieces decreases, the resistance value for pulling out the lowermost sheet-like workpiece decreases, and the delay amount of the sending timing of the lowermost sheet-like workpiece tends to be reduced. Therefore, the feeding timing of the lowermost sheet-like workpiece becomes unstable.

  In the above Patent Documents 3 and 6, the disadvantage of the above-described conventional great-type feeding device is eliminated, and a shape in which a part of the cross-section is cut out as a feeding device that intermittently feeds a sheet-like workpiece without using a grate. A sheet workpiece feeding apparatus using a sheet feeding roller is disclosed. On the outer periphery of the paper feed roller, there are provided a contact portion (convex portion) that can contact the sheet-like workpiece and a notch portion (recess portion) that cannot contact the sheet-like workpiece.

  However, as the type of the sheet-like workpiece, there is a difference between at least the length in the feeding direction, and in order to correspond to each of the sheet-like workpieces having different lengths, in the apparatus described in Patent Document 3, each time, All the paper feed rollers must be replaced with paper feed rollers having dimensions (abutting portion lengths) corresponding to the respective sheet-like workpieces of each length. If, for example, a sheet-like workpiece shorter than the set sheet-like workpiece is to be sent out without changing the length of the contact portion corresponding to the sheet-like workpiece having a predetermined length, The feed roller on the feed roller side and the second sheet-like workpiece from the bottom come into contact with each other, and the above-mentioned phenomenon of bringing in the sheet-like workpiece occurs. In the apparatus described in Patent Document 3, a plurality of paper feed rollers rotate at a constant speed, and a plurality of paper feed rollers and a printing cylinder rotate at a constant speed. And the outer diameter of the printing cylinder must be equal. For this reason, the outer diameter of the sheet feeding roller becomes large, and the plurality of sheet feeding rollers cannot be disposed physically close to the conveying direction of the sheet-like workpiece, and a plurality of rollers are located near the front end of the sheet-like workpiece. The sheet-like workpiece cannot be sent out by concentrating the driving force of the paper feed roller. Therefore, it is difficult to feed the sheet-like workpiece stably. In addition, since a plurality of paper feed rollers having a large outer diameter are arranged, a large sheet-like workpiece feeding device is formed. On the other hand, the apparatus described in Patent Document 6 has an acceleration / deceleration pattern in which a plurality of paper feed rollers accelerate at the start of feeding of a sheet-shaped workpiece and decelerate immediately before the start of feeding of the next sheet-shaped workpiece. Although it is possible to make the outer diameter of the paper feed roller slightly smaller than that of the apparatus, it is still possible to make it less than 20% (see FIG. 12 and FIG. 13), and near the front end of the sheet-like workpiece. Concentrating the driving force of a plurality of paper feed rollers to send out a sheet-like work is hardly improved. Therefore, it is difficult to feed the sheet-like workpiece stably. In the devices described in Patent Documents 3 and 6, a load from the stacked sheet-like work is applied from above the stacked sheet-like work, and a vacuum suction force from the suction means is applied from below, so that the lowermost layer work There is a problem that the resistance value for pulling out the sheet-like workpiece increases.

  Accordingly, an object of the present invention is to provide a sheet-like workpiece feeding method and a feeding device capable of feeding the lowermost sheet-like workpiece at an accurate timing even if the dimensions and materials of the sheet-like workpiece are different. Objective.

The sheet-like workpiece feeding method according to the present invention includes a sheet feeding roller that feeds the lowermost sheet-like workpiece among the stacked sheet-like workpieces to the feed roller side, a roller driving unit that rotates the sheet feeding roller, and a sheet feeding roller. A table having an opening for exposing the upper surface side of the sheet, a lifter for holding the stacked sheet-like workpieces at a predetermined height for a predetermined period, and a lifter driving means for raising and lowering the lifter. the paper feed roller and the lifter in the conveying direction of the workpiece by using a delivery device of a sheet-like workpiece which is arrayed alternately, each was independently drive the lifter driving means you drive the lifter, lowermost fed The rear end of the sheet-like workpiece is raised from the upper surface of the table in order from the lifter.

  According to the present invention, a plurality of the lifters are arranged in the conveying direction of the lowermost sheet-like workpiece, and the plurality of lifter driving means for driving these lifters are independently driven, respectively. By sequentially raising the lifted sheet from the lifter (upstream lifter) from which the end is removed, the descent of the stacked remaining sheets is restricted so that the pressure applied by the remaining sheets is not applied in the vicinity of the rear end of the sheet-like workpiece to be fed. Further, since the sheet-like workpiece in the middle of feeding is not pushed up from the lower side like the conventional great method, the situation where the lowermost sheet-like workpiece is bent does not occur, and the feed roller is lowermost. The pull-out resistance when pulling out the sheet-like workpiece does not increase. Therefore, the feeding timing of the lowermost sheet-like workpiece is always stable. Further, the lifter does not lift the lowermost sheet-like workpiece in the middle of feeding, and the above-mentioned choke phenomenon of the sheet-like workpiece is prevented.

The sheet-like workpiece feeding method according to the present invention includes a sheet feeding roller that feeds the lowermost sheet-like workpiece among the stacked sheet-like workpieces to the feed roller side, a roller driving unit that rotates the sheet feeding roller, and a sheet feeding roller. A table having an opening for exposing the upper surface side of the sheet, a lifter for holding the stacked sheet-like workpieces at a predetermined height for a predetermined period, and a lifter driving means for raising and lowering the lifter. the paper feed roller and the lifter in the conveying direction of the workpiece by using a delivery device of a sheet-like workpiece which is arrayed alternately, each was independently driving the roller driving means Ru is intermittently rotating said feed roller, it is fed The sheet feeding roller is stopped in order from the sheet feeding roller from which the rear end of the lowermost sheet-like workpiece is removed.

  According to the present invention, a plurality of the sheet feeding rollers are arranged in the conveying direction of the lowermost sheet-like workpiece, and the plurality of roller driving means for intermittently rotating the sheet feeding rollers are independently driven, respectively, so that the lowermost sheet is fed out. Even if the sheet feed roller comes into contact with the second sheet work from the bottom by stopping sequentially from the paper feed roller where the rear end of the sheet work is removed, the above-mentioned sheet work is brought in The phenomenon does not occur.

The sheet-like workpiece feeding method according to the present invention includes a sheet feeding roller that feeds the lowermost sheet-like workpiece among the stacked sheet-like workpieces to the feed roller side, a roller driving unit that rotates the sheet feeding roller, and a sheet feeding roller. A table having an opening for exposing the upper surface side of the sheet, a lifter for holding the stacked sheet-like workpieces at a predetermined height for a predetermined period, and lifter driving means for raising and lowering the lifter , periphery consists cut edge does not project from the opening of the tread surface and the table in contact with the lowermost sheet workpiece protruding from the opening of the table, the said lifter to the conveying direction of the lowermost sheet-shaped workpiece with the feed roller dispensing apparatus alternately arranging a plurality sheet-like workpiece, said lifter the sheet workpiece in which the control means are stacked Accordingly, the initial contact phase of the paper feed roller that first makes contact with the tread surface on the outer periphery of the paper feed roller and the lowermost sheet-like workpiece while being held at a position higher than the upper surface of the table is adjusted, and the lifter is adjusted. In a state where the tread surface on the outer periphery of the paper feed roller is brought into contact with the lowermost sheet-like workpiece in a state where the paper is lowered to a position lower than the upper surface of the table, The sheet feed roller is not brought into contact with the lowermost sheet-like workpiece that moves on the table by setting the outer peripheral notch surface to the upper surface side. Here, the tread surface on the outer periphery of the paper feed roller is arranged at a position that protrudes from the opening of the table and contacts the lowermost sheet-like workpiece in a state where the tread surface on the outer periphery of the paper feed roller is on the upper surface side. Means contact surface. Further, the notch surface on the outer periphery of the paper feed roller means that even if the notch surface on the outer periphery of the paper feed roller is in the state of the upper surface side, it does not protrude from the opening of the table, This means a non-contact surface arranged at a position where it does not come into contact with the sheet-like workpiece.

  According to the present invention, the sheet-like workpiece on which the control means is stacked is held at a position higher than the upper surface of the table by the lifter, and the tread surface on the outer periphery of the paper feed roller and the lowermost sheet-like workpiece are The initial contact phase of the paper feed roller to be contacted first is adjusted, and the tread surface on the outer periphery of the paper feed roller is used as the lowermost sheet-like workpiece in a state where the lifter is lowered to a position lower than the upper surface of the table. After completing the operation of feeding to the feed roller side, the feed roller is brought into contact with the lowermost sheet-like workpiece moving on the table by setting the notch surface on the outer periphery of the feed roller to the upper surface side. Therefore, the initial contact phase of the sheet feeding roller with respect to the sheet-like workpiece can be matched with the length of the sheet-like workpiece in the conveying direction (sheet length).

  The sheet-like workpiece feeding method according to the present invention is characterized in that the initial contact phases of the sheet feeding rollers that first contact the sheet feeding roller and the lowermost sheet-like workpiece are different from each other.

  According to the present invention, the initial contact phases of the paper feed rollers that first contact the plurality of paper feed rollers and the lowermost sheet-like work are different from each other, so that the feeding can be performed according to the sheet length of the sheet-like work. The rotation of the paper roller can be controlled. In other words, the optimum feeding timing of the sheet-like workpiece can be set by appropriately adjusting the contact phases of the plurality of paper feed rollers.

The sheet-like workpiece feeding device according to the present invention includes a sheet feeding roller that feeds the lowermost sheet-shaped workpiece among the stacked sheet-like workpieces to the feed roller side, a roller driving unit that rotates the sheet feeding roller, and a sheet feeding roller. A table having an opening for exposing the upper surface side of the sheet, a lifter for holding the stacked sheet-like workpieces at a predetermined height for a predetermined period, a lifter driving means for raising and lowering the lifter, and controlling the roller driving means Control means for intermittently rotating the paper feed roller, and control means for controlling the lifter driving means to move the lifter up and down, and the lifter and the paper feed in the conveying direction of the lowermost sheet-like workpiece rollers are arrayed alternately, with the lifter driving means that drive the said lifter is independently driven, Ru is intermittently rotating the feed roller roller Wherein the motion means is configured to independently drive.

  According to the present invention, a plurality of the lifters and the sheet feeding rollers are alternately arranged in the conveyance direction of the lowermost sheet-like workpiece, thereby supporting the length of the sheet-like workpiece in the feeding direction (sheet length). Thus, it is easy to set an optimum feed timing of the sheet-like workpiece by matching the initial contact phase of the sheet feed roller with respect to the sheet-like workpiece or by matching the lift timing of the lifter.

The sheet-like workpiece feeding device according to the present invention includes a tread surface in which the outer periphery of the sheet feeding roller projects from the opening of the table and contacts the lowermost sheet-shaped workpiece, and a notch surface that does not project from the opening of the table. and wherein the Do that.

  According to the present invention, for example, when the sheet length of the sheet-like workpiece is long, the tread surface on the outer periphery of the feed roller on the downstream side (feed roller side) can be prevented from contacting the sheet-like workpiece being fed.

  In the sheet workpiece feeding device according to the present invention, the section of the lifter is formed in a substantially triangular prism structure having a substantially triangular shape, and is arranged so that one surface of the substantially triangular prism is an upper surface. It is characterized by being.

  According to the present invention, the section of the lifter is formed in a substantially triangular prism structure having a substantially triangular shape, arranged so that one surface of the substantially triangular prism is an upper surface, and the lower surface side of the substantially triangular prism is connected to the lifter driving means. Thus, a small and highly rigid lifter is formed, and a sheet-like workpiece feeding device having a compact structure in which the lifter is attached using the space between the paper feed roller and the paper feed roller to the maximum.

  In the sheet workpiece feeding device of the present invention, the upper surface of the table has a shape or material having a small friction coefficient with the sheet workpiece, and the upper surface of the lifter has a shape or material with a large friction coefficient with the sheet workpiece. It is characterized by being.

  According to the present invention, the table and the lifter can select an optimum shape or material according to their roles, and the feeding posture of the sheet-like workpiece is stabilized, as well as the upper surfaces of the table and the lifter ( Each surface) is less likely to wear, and durability is improved. Here, in the case of a sheet-like workpiece whose surface is flat and smooth like a corrugated cardboard sheet, the shape having a small friction coefficient with the sheet-shaped workpiece (corrugated cardboard sheet) is, for example, wear-resistant The contact area with the sheet-like workpiece is reduced by applying a satin finish to the metal surface, forming dimple shapes as seen on the surface of golf balls, or forming a large number of hemispherical small protrusions evenly on the surface. Shape. Examples of the material having a small coefficient of friction with the sheet-like workpiece include hard metal, plastic having high lubricity such as polyacetal, and metal coated with fluororesin. And as a material with a large friction coefficient with the said sheet-like workpiece | work, a rubber material, the metal etc. which were coated with the soft urethane resin are mentioned, for example.

  In the sheet workpiece feeding device according to the present invention, it is preferable that the tread surface on the outer periphery of the sheet feeding roller has a shape or material having a large friction coefficient with the sheet workpiece. Since the tread surface on the outer periphery of the sheet feed roller has a shape or material having a large friction coefficient with the sheet-like work, the sheet-feed roller is fed out without slipping between the sheet-like work. In the present invention, it is preferable that a slip line (groove) that shows the degree of wear is formed on the tread surface on the outer periphery of the paper feed roller. By forming a slip line (groove) on the outer tread surface of the paper feed roller, it is possible to easily determine the part replacement time due to wear. In the present invention, it is preferable that an inner peripheral portion of the shaft of the paper feed roller is formed to be hollow. Since the inner periphery of the shaft of the paper feed roller is formed hollow, the inertia (moment of inertia) of the paper feed roller is reduced, and the paper feed roller can be immediately rotated or stopped.

  In the sheet-like workpiece feeding method and feeding device according to the present invention, suction means for bringing the lowermost sheet-like workpiece into contact with the tread surface of the outer periphery of the sheet feeding roller by sucking from the opening of the table is provided below the table. The lowermost sheet-like workpiece is fed to the feed roller side by the paper feed roller, and then the suction force to the lowermost sheet-like workpiece moving on the table is weakened.

  According to the present invention, after the lowermost sheet-like work is fed to the feed roller side by the paper feed roller, the lowermost sheet-like work moves on the table and is drawn to the feed roller side by the feed roller. During this time, by weakening the suction force to the lowermost sheet-like workpiece, the lowermost sheet-like workpiece is not attracted to the table and the sliding resistance is reduced. Will be.

  The sheet-like workpiece feeding method and feeding device according to the present invention includes a front gauge that forms a gate for feeding only the lowermost sheet-like workpiece to the feed roller side, and a gate that opens and closes the gate by raising and lowering the gate. A plate and a gate plate driving means for raising and lowering the gate plate, and before the feeding of the lowermost sheet-like work starts, the feeding of first contacting the tread surface on the outer periphery of the paper feed roller and the lowermost sheet-like work. After adjusting the initial contact phase of the paper roller and positioning it to a predetermined phase, the sheet-like work in the lowermost layer is advanced by rotating the paper feed roller by a minute angle while controlling the gate plate, lifter and vacuum suction machine. Open the gate after bringing the side tip into contact with the gate plate, and move the lowermost sheet-like workpiece to the feed roller side. It is preferable to feed. According to the present invention, the lowermost sheet-shaped workpiece is accurately aligned with the position of the gate plate, which is a preset reference position, and then the lowermost sheet-shaped workpiece is fed to the feed roller side. Can do.

  According to the sheet-like workpiece feeding method and feeding device of the present invention, after the feeding of the lowermost sheet-like workpiece is completed, the feeding roller is decelerated, and the outer periphery of the feeding roller is set until the next sheet-like workpiece is prepared for feeding. It is preferable that the tread surface of this stands by under the table. According to the present invention, since the paper feed roller does not contact the next sheet-like workpiece until the next sheet-like workpiece is prepared for feeding, the reference position of the next sheet-like workpiece is difficult to shift.

  According to the present invention, a plurality of the lifters are arranged in the conveying direction of the lowermost sheet-like workpiece, and the plurality of lifter driving means for driving these lifters are independently driven, respectively. By sequentially raising the lifted sheet from the lifter (upstream lifter) from which the end is removed, the descent of the stacked remaining sheets is restricted so that the pressure applied by the remaining sheets is not applied in the vicinity of the rear end of the sheet-like workpiece to be fed. Further, since the sheet-like workpiece in the middle of feeding is not pushed up from the lower side like the conventional great method, the situation where the lowermost sheet-like workpiece is bent does not occur, and the feed roller is lowermost. The pull-out resistance when pulling out the sheet-like workpiece does not increase. Therefore, the feeding timing of the lowermost sheet-like workpiece is always stable. Further, the lifter does not lift the lowermost sheet-like workpiece in the middle of feeding, and the above-mentioned choke phenomenon of the sheet-like workpiece is prevented. Further, according to the present invention, a plurality of the sheet feeding rollers are arranged in the conveying direction of the lowermost sheet-like workpiece, and a plurality of roller driving means for intermittently rotating these sheet feeding rollers are independently driven to be sent out. Even if the sheet feeding roller comes into contact with the second sheet-shaped workpiece from the bottom by stopping the sheet-shaped workpiece sequentially from the sheet feeding roller from which the rear end of the sheet-shaped workpiece comes off, No entrainment phenomenon occurs.

  According to the present invention, the sheet-like workpiece on which the control means is stacked is held at a position higher than the upper surface of the table by the lifter, and the tread surface on the outer periphery of the paper feed roller and the lowermost sheet-like workpiece are The initial contact phase of the paper feed roller to be contacted first is adjusted, and the tread surface on the outer periphery of the paper feed roller is used as the lowermost sheet-like workpiece in a state where the lifter is lowered to a position lower than the upper surface of the table. After completing the operation of feeding to the feed roller side, the feed roller is brought into contact with the lowermost sheet-like workpiece moving on the table by setting the notch surface on the outer periphery of the feed roller to the upper surface side. Therefore, the initial contact phase of the sheet feeding roller with respect to the sheet-like workpiece can be matched with the length of the sheet-like workpiece in the conveying direction (sheet length).Further, according to the present invention, by varying the initial contact phase of the paper feed roller that first contacts the plurality of paper feed rollers and the lowermost sheet-like work, according to the sheet length of the sheet-like work, The rotation of the paper feed roller can be controlled. In other words, the optimum feeding timing of the sheet-like workpiece can be set by appropriately adjusting the contact phases of the plurality of paper feed rollers.

  According to the present invention, a plurality of the lifters and the sheet feeding rollers are alternately arranged in the conveyance direction of the lowermost sheet-like workpiece, thereby supporting the length of the sheet-like workpiece in the feeding direction (sheet length). Thus, it is easy to set an optimum feed timing of the sheet-like workpiece by matching the initial contact phase of the sheet feed roller with respect to the sheet-like workpiece or by matching the lift timing of the lifter. Further, according to the present invention, for example, when the sheet length of the sheet-like workpiece is long, the tread surface on the outer periphery of the sheet feeding roller on the downstream side (feed roller side) can be prevented from contacting the sheet-like workpiece being fed.

  Since it is not a system in which the grate moves up and down as in the past, according to the present invention, there is less air leakage from the fixed table, and the lowermost sheet-like workpiece can be adsorbed efficiently. A suction machine is sufficient. Further, according to the present invention, the lifter is formed in a substantially triangular prism structure in which the cross section of the lifter is substantially triangular, so that the lifter is small and highly rigid. A sheet-like workpiece feeding device having a compact structure in which the lifter is attached using the space between them to the maximum. In addition, since the feeding timing of the lowermost sheet-like workpiece is determined only by the rotation timing of the paper feed roller, both the great height and the great rising timing are finely adjusted, as in the conventional great method, There is no need to look at the state of the apparatus while performing a trial run to check whether the sheet-like workpiece is delivered properly, and it is freed from the troublesome routine adjustments.

  Furthermore, in the case of the conventional great method, when the sheet thickness of the sheet-like workpiece is thin and flexible, the leading edge of the sheet is likely to hang downward, and the second sheet-like workpiece is likely to be brought in from the bottom. According to the present invention, the lifter is lifted immediately after passing through the lowermost sheet-like workpiece to prevent the second sheet-like workpiece from the bottom from overlapping the lowermost sheet-like workpiece, and the control means is provided for the gate plate. By controlling the elevation, even if the sheet thickness is thin and flexible, it is possible to prevent the sheet tip of the second sheet-like work from the bottom from entering the gate port. Further, in the conventional great method, since the lowermost sheet-like workpiece and the paper feed roller are in contact with each other, the feeding of the lowermost sheet-like workpiece should not be braked. Until then, the paper feed roller could not be decelerated, which caused a reduction in the deceleration period during which the paper feed roller was decelerated. On the other hand, according to the present invention, when the paper feed roller rotates past the contact angle region between the outer tread surface and the sheet-like workpiece, the non-contact angle region of the outer notch surface becomes The sheet feeding roller can be decelerated without being affected by the ascending operation. Further, according to the present invention, since the inner peripheral portion of the shaft of the paper feed roller is formed hollow, the inertia (moment of inertia) of the paper feed roller can be reduced, and the paper feed roller is immediately rotated. Can be stopped. Therefore, even if the sheet length and material of the sheet-like workpiece are different, a sheet-like workpiece feeding device capable of feeding the lowermost sheet-like workpiece at high speed at an accurate timing is realized.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

(Embodiment of the present invention)
A specific embodiment to which the present invention is applied is that the present invention is applied to a box making machine (Flexo Folder Gluer) that produces a cardboard box by performing processing such as printing, cutting and gluing on a sheet-like work (corrugated cardboard sheet). This is an example. The sheet-like workpiece is not limited to a corrugated cardboard sheet, and may be any type such as paperboard or synthetic resin sheet. In the box making machine, the sheet-like workpiece feeding device is connected to the upstream side, and then the downstream side is connected in the order of a feed roller, a printing unit, a slotter unit, a die cutter unit, a folding unit, and a delivery unit. Hereinafter, in this specification, the feeding device side of the sheet-like workpiece is referred to as an upstream side, and the feed roller side is referred to as a downstream side.

(First embodiment of the present invention)
FIG. 1 is a perspective view schematically showing a sheet-like workpiece feeding device 1a according to the first embodiment of the present invention, and FIG. 2 is a schematic view of the sheet-like workpiece feeding device 1a according to the above embodiment from the side. FIG. An arrow Xa in FIG. 1 indicates the traveling direction (conveying direction) of the lowermost sheet-like workpiece 2 and is directed from the upstream side to the downstream side. The sheet-like workpiece feeding device 1a of the present embodiment includes four sheet feeding rollers 30 (31, 31) that feed the lowermost sheet-like workpiece 2 of the stacked sheet-like workpieces 12 toward the feed roller 101 and the belt roller 102. 32, 33, 34) and roller driving means 30M (31M, 32M, 33M, 34M) for independently rotating the four paper feed rollers 30.

  The four paper feed rollers 30 are arranged in the order of the paper feed rollers 34, 33, 32, and 31 in order from the upstream side in the conveyance direction Xa of the lowermost sheet-like work 2. The paper feed roller 30 has a hollow tube roller as a hub 30e. This is to reduce the inertia (moment of inertia) of the paper feed roller 30 so that the paper feed roller 30 can be immediately rotated or stopped. A plurality of wheels 30d are detachably fixed to the hub 30e on the outer periphery of the hub 30e. In FIG. 1, nine wheels 30 d are fixed to one paper feed roller 30. The wheels 30d of the paper feed rollers 30 are staggered in a staggered manner by shifting their positions so as not to contact each other (FIG. 1). This is because the contact density of the contact area with the lowermost sheet-like workpiece 2 is increased so that the wrinkle is less likely to move toward the lowermost sheet-like workpiece 2 when the driving force is transmitted to the lowermost sheet-like workpiece 2. In addition, the space around the paper feed roller 30 is saved. Therefore, the openings 4h of the table 4 on which the lowermost sheet-like work 2 is placed are arranged in the checkered pattern (FIG. 1).

  A plurality of wheels 30d fixed to the outer periphery of the hub 30e of each paper feed roller 30 protrude from the opening 4h of the table 4 and come into contact with the lowermost sheet-like work 2 and the opening of the table 4 A notch surface 30b that does not protrude from 4h is provided. Although the outer peripheral length of the tread surface 30a is arbitrary, the outer peripheral length is appropriately set so as to be applicable to the length of the sheet-like workpiece 2. When the tread surface 30 a of the wheel 30 d protrudes from the opening 4 h of the table 4, the lowermost sheet-like work 2 is slightly lifted from the upper surface 4 a of the table 4. At this time, the gap s between the lowermost sheet-like workpiece 2 and the upper surface 4a of the table 4 has a sufficiently small remaining sheet weight of the laminated sheet-like workpiece 12, and is due to the suction means 70 to the lowermost sheet-like workpiece 2. When the suction force is sufficiently small, the amount of protrusion of the tread surface 30a protruding from the opening 4h of the table 4 is substantially equal. Therefore, by increasing the suction force by the suction means 70 to the lowermost sheet-like workpiece 2, the contact pressure with respect to the tread surface 30a of the lowermost sheet-like workpiece 2 is increased, and the lowermost sheet-like workpiece 2 is quickly moved. The operation can be shifted to sending out.

  The tread portion provided with the tread surface 30a formed on each wheel 30d fixed to the outer periphery of the hub 30e of the paper feed roller 30 is attached to the notch portion provided with the notch surface 30b. The tread surface 30a is made of a resin having a flat shape without unevenness in order to increase the coefficient of friction with the sheet-like workpiece, and the notch portion provided with the notch surface 30b has a low specific gravity and a high rigidity to reduce the weight. Is used. In the center of the tread surface 30a, a slip line (groove) that shows the degree of wear is formed along the rotation direction of the paper feed roller 30 (not shown). The shape of the slip line (groove) and the presence / absence of slip line formation are arbitrary.

  Roller driving means 30M (31M, 32M, 33M, 34M) for independently rotating the four paper feed rollers 30 is a servo motor. The roller driving means 31M and 33M are arranged at the near side position shown in FIG. 1, and the roller driving means 32M and 34M are arranged at the far side position shown in FIG. In this way, it is not necessary to attach the driving means 30M between the adjacent shafts to the same side surface, so that the spacing between the driving means 30M is increased, and the large-sized high-output driving means 30M is attached accordingly. Is possible.

  At a position between the sheet feeding roller 30 and the feed roller 101, a front gauge 8 for forming a gate (gap) i for feeding only the lowermost sheet-like workpiece 2 to the feed roller 101 side, and the gate i are provided. A gate plate 9 that opens and closes by the raising and lowering movement and a gate plate driving means 9M that raises and lowers the gate plate 9 are provided (FIG. 1). The gate plate driving means 9M is a servo motor. Then, by the sheet-like workpiece feeding method described later, the tip 2c of the lowermost sheet-like workpiece 2 is brought into contact with the upstream side surface 9d of the gate plate 9 which is a preset reference position and is accurately on the reference position 9p-9p line. After being aligned, the lowermost sheet-like workpiece 2 is fed to the feed roller 101 side. The gate plate 9 is disposed at a position between the bridge plate 103 and the table 4, and the upper surface 103 a of the bridge plate 103 and the upper surface 4 a of the table 4 are set to the same height. The gate (gap) i is a gap between the upper surface 4a of the table 4 and the lower end of the front gauge 8. When the gate plate 9 is lowered below the upper surface 4a of the table 4, the size of the gate i is the maximum. The size is set such that only the lower sheet-like workpiece 2 can pass through (FIG. 2).

  The rotation center shafts 31c, 32c, 33c, and 34c of the paper feed roller 30 are all on a parallel plane including horizontal lines 30q-30q parallel to the upper surface 4a of the table 4, and are orthogonal to the transport direction Xa. Each sheet feeding roller 30 rotates counterclockwise (counterclockwise) in FIG. 2 in order to feed the lowermost sheet-like work 2 toward the feed roller 101 side.

  Here, the starting end 30 a 1 of the outer tread surface 30 a of the paper feed roller 30 is set as a reference position in the rotation direction of the paper feed roller 30. The angle at which the start end 30a1 of the tread surface 30a overlaps the vertical line 30p-30p is defined as the phase (angle) 30K of the paper feed roller 30 being 0 [°] (30K = 0 [°]). For example, in FIG. 2, the contact phase 31K1 of the first paper feed roller 31 with the lowermost sheet-like workpiece 2 is advanced by 5 [°] from the 0 [°] position indicated by the vertical line 31p-31p. The position is indicated (31K1 = 5 [°]). On the other hand, separately from the phase 30K of the sheet feeding roller 30, the control means 6 controls the sheet-like workpiece feeding device 1a of the present embodiment to periodically repeat the feeding operation of the lowermost sheet-like workpiece 2. The starting phase of the sheet-like workpiece 2 in the lowermost layer is defined as the initial phase θ1 of the apparatus 1a being 0 [°] (θ1 = 0 [°]).

  The sheet-like workpiece feeding device 1a of the present embodiment includes a fixed table 4 on which the sheet-like workpiece 2 is placed. The table 4 is provided with a plurality of openings 4 h, and the role of these openings 4 h is an opening 4 h for exposing the upper surface side of the paper feed roller 30, and the opening 4 h is provided by the suction means 70. This is an opening 4h for bringing the lowermost sheet-like work 2 into contact with the tread surface on the outer periphery of the paper feed roller. In the sheet-like workpiece feeding device 1a of the present embodiment, the table 4 is fixed at a predetermined position, unlike the conventional great method. This is to prevent the above-described choke phenomenon of the sheet-like workpiece 2. A suction means 70 is disposed below the table 4. The suction means 70 includes a suction box 72 that contains the paper feed roller 30 and is fixed to the lower side of the table 4, and a vacuum suction device 71 that sucks air from the opening 4 h of the table 4 through the suction box 72 ( FIG. 1, FIG. 2). Since there is no gap on the side surface of the fixed table 4, there is less air leakage compared to the conventional great method, and a vacuum suction machine 71 with a small capacity is sufficient. The arrow Yb in FIG. 2 represents the direction of air when the vacuum suction device 71 is operated. The table 4 is made of wear-resistant metal, and the upper surface 4a of the table 4 is subjected to a satin finish on the surface. This is to reduce the friction coefficient by uniformly reducing the contact points per unit contact area with the sheet-like workpiece 2.

  The sheet-like workpiece feeding device 1a according to the present embodiment has a lifter 50 (51, 52, 53, 54) for holding the laminated sheet-like workpiece 12 at a predetermined height above the upper surface 4a of the table 4 for a predetermined period. ) And lifter driving means 50M (51M, 52M, 53M, 54M) for raising and lowering the lifter 50 independently. The lifter 50 is made of a plate-like member, and is disposed so as to be housed (can be incorporated) in the apparatus 1 a at a position below the upper surface 4 a of the table 4. The lifter driving means 50M is a servo motor. The upper surface 50a of the lifter 50 is subjected to wear-resistant soft urethane coating in order to increase the coefficient of friction with the sheet-like workpiece (corrugated cardboard sheet) 2. In the sheet-like workpiece feeding device 1a according to this embodiment, four lifters 50 and four feeding rollers 30 are alternately arranged in the conveying direction Xa of the lowermost sheet-like workpiece 2.

  The sheet workpiece feeding device 1a according to the present embodiment controls the roller driving unit 30M to rotate the sheet feeding roller 30 intermittently or controls the lifter driving unit 50M to move the lifter 50 up and down (control). Circuit) 6. The control means 6 includes roller driving means 31M, 32M, 33M, 34M for rotating the paper feed roller 30, lifter driving means 51M, 52M, 53M, 54M for raising and lowering the lifter 50, a vacuum suction device 71 for sucking air, and a gate. The gate plate driving means 9M for raising and lowering the plate 9 and the driving means 101M for rotating the feed roller 101 are controlled to be driven independently or synchronously. The driving means 30M, 50M, 71, 9M, 101M and the like are interconnected by parallel signal lines such as a high-speed serial communication line and an abnormality detection signal line. The control means 6 controls the initial stage of the paper feed roller that first contacts the paper feed rollers 31, 32, 33, 34 and the lowermost sheet-like work 2 in accordance with the sheet length 2 f in the conveying direction of the sheet work 2. The contact phases 31K1, 32K1, 33K1, and 34K1 are made different or matched. For example, in FIG. 4, the contact phase 31K1 of the first paper feed roller 31 with the lowermost sheet-like workpiece 2 is advanced by 5 [°] from the 0 [°] position indicated by the vertical line 31p-31p. The position is indicated (31K1 = 5 [°]). The contact phase 32K1 of the second paper feed roller 32 with the lowermost sheet-like workpiece 2 is shown at a position advanced by 5 [°] from the 0 [°] position indicated by the vertical lines 32p-32p. (32K1 = 5 [°]). The contact phase 33K1 of the third paper feed roller 33 with the lowermost sheet-like work 2 is shown at a position advanced by 122 [°] from the 0 [°] position indicated by the vertical lines 33p-33p. (33K1 = 122 [°]). The contact phase 34K1 of the fourth paper feed roller 34 with the lowermost sheet-like workpiece 2 is a position (or 15 [] which is advanced 345 [°] from the 0 [°] position indicated by the vertical lines 34p-34p. (°] delayed position) (33K1 = 345 [°]).

  Then, the sheet-feeding roller 30 is brought into contact with the outermost tread surface 30a of the sheet-feeding roller 30 and the lowermost sheet-shaped workpiece 2 before starting the feeding of the lowermost sheet-like workpiece 2 by the sheet-like workpiece feeding method described later. After adjusting the contact phase 30K and positioning at a predetermined angle, the sheet feed roller 30 is rotated by a minute angle (minute rotation amount) δ1 while controlling the gate plate 9 and the vacuum suction device 71, so that the lowermost sheet After the advancing side tip 2c of the sheet-like workpiece 2 is brought into contact with the gate plate 9, the lowermost sheet-like workpiece 2 is fed to the feed roller 101 side.

(Second embodiment of the present invention)
FIG. 5 is a perspective view schematically showing a sheet-like workpiece feeding device 1b according to the second embodiment of the present invention. FIG. 6 shows a lifter 50 arranged in the sheet-like workpiece feeding device 1b according to the above embodiment. 2 is a perspective view schematically showing a drive system of the lifter drive means 50M. FIG. 7 is a cross-sectional view schematically showing the sheet-like workpiece feeding device 1b of the above embodiment from the side surface side. The sheet-like workpiece feeding device 1b according to the present embodiment includes four sheet feeding rollers 30 (31, 31) for feeding the lowermost sheet-like workpiece 2 of the stacked sheet-like workpieces 12 to the feed roller 101 and the belt roller 102 side. 32, 33, 34), roller driving means 30M (31M, 32M, 33M, 34M) for independently rotating the four paper feed rollers 30, and an opening for exposing the upper surface side of the paper feed roller 30. 4h for holding the lowermost sheet-like workpiece 2 and the laminated sheet-like workpiece 12 at a predetermined height P2 above the upper surface 4a of the table 4 for a predetermined period. Lifters 50 (501, 502, 503, 504) and two sets of lifters 50 (501 and 502, 503 and 504) connected by a link mechanism. The lifter driving means 50M (51M, 53M) that moves up and down independently and the roller driving means 30M are controlled to intermittently rotate the paper feed roller 30, or the lifter driving means 50M is controlled to move the lifter 50 up and down. Control means (control circuit) 6 is provided.

  The lifter 50 has a substantially triangular prism structure with a substantially triangular cross section, and the interior thereof is hollow (FIG. 6). More specifically, the cross section has a shape in which three apex portions of a triangle are chamfered, and is made of hard metal. Then, one surface of the substantially triangular prism is arranged to be the upper surface 50a, and the lowermost end 50e on the lower surface side of the approximately triangular prism is lifter driving means via the crank rod 50f, the crank 50g, the crankshaft 50i, the crank 50h, and the crankshaft 50j. (Lifter drive motor) It is connected to 50M. This is because the lifter 50 has a substantially triangular prism structure in cross section, and a driving force is transmitted to the lowermost end portion 50e on the lower surface side of the substantially triangular shape, which is a contact point resistant to external force, so that the lifter is small and highly rigid. Because. In the example shown in FIG. 6, the lifters 501 and 502 on the downstream side are lifted and lowered simultaneously by the lifter driving means 51M, and the lifters 503 and 504 on the upstream side are lifted and lowered simultaneously by the lifter driving means 53M. It is said. This is particularly effective when the space for arranging the lifter driving means 50M is limited (when the space is small). In order to increase the friction coefficient between the upper surface 50a of the lifter 50 and the sheet-like workpiece 2, a rubber-like plate-like member is bonded.

  The lifter 50 is disposed so as to be housed (can be built in) in a recessed portion 4 k of the table 4 formed below the upper surface 4 a of the table 4. A buffer member 41 is disposed between the lower surface side of the lifter 50 and the upper surface side of the recessed portion 4 k of the table 4. This is to prevent vibration from being transmitted to the table 4 during the lifting / lowering operation of the lifter 50 and to stabilize the lifter 50 when the lifter 50 is housed in the recess 4k of the table 4. The lifter 50 is disposed between the paper feed roller 30 and the paper feed roller 30 so that the space between the paper feed roller 30 and the paper feed roller 30 is maximized. It becomes the sheet | seat workpiece | work delivery apparatus 1b.

  At a position between the sheet feeding roller 30 and the feed roller 101, a front gauge 8 for forming a gate (gap) i for feeding only the lowermost sheet-like workpiece 2 to the feed roller 101 side, and the gate i are provided. A gate plate 9 that opens and closes by the raising and lowering movement and a gate plate driving means 9M that raises and lowers the gate plate 9 are provided (FIG. 5). The gate plate 9 is arranged so as to be housed (can be incorporated) in a recess 72k of a suction box 72 formed below the upper surface 4a of the table 4.

  FIG. 8A is a plan view schematically showing the sheet-like workpiece feeding device 1b according to the above embodiment, and FIG. 8B and FIG. 8C are different in size of the sheet-like workpiece 2 respectively. It is a partial cross section arrow view of FIG. On the upstream side of the front gauge 8 in the traveling direction Xa of the lowermost sheet-like workpiece 2, after the laminated sheet-like workpiece (the remaining laminated sheets) 12 on the lowermost sheet-like workpiece 2. A back stopper 104 is provided for receiving the end (FIG. 8). The back stopper 104 separates the lowermost sheet-like work 2 from the rear end of the stacked remaining sheets 12 to reduce the weight load on the lowermost sheet-like work 2 from above. A pair of side guides 105 are provided on the upstream side 8d of the front gauge 8 so as to guide the positions of both sides of the laminated sheet-like workpiece 12 so as not to shift. The pair of side guides 105 is widened to the left and right as shown in FIG. 8 (b) or left and right as shown in FIG. 8 (c) in accordance with the width 2w of the sheet-like workpiece 2. The interval is narrowed.

  A shutter 75 that can be drawn out and extended in a bellows shape is attached to the outside of the pair of side guides 105 arranged with the stacked sheet-like workpieces 12 interposed therebetween (FIG. 8). The shutter 75 partially covers or exposes the table 4 having the opening 4 h, thereby restricting air from entering the duct 73 from the outside of the apparatus 1 c through the opening 4 h of the table 4. A table 4 on which the lowermost sheet-like workpiece 2 is placed is disposed below the stacked sheet-like workpiece 12 and the shutters 75 on both sides thereof. A suction box 72 is attached to the lower side of the table 4 so that the lowermost sheet-like work 2 is sucked into the upper surface of the paper feed roller 30 (FIGS. 8B and 8C). The suction box 72 is composed of three independent rooms 721, 722, 723, and the respective suction boxes 72 (721, 722, 723) and the vacuum suction device 71 are connected by ducts 73 (731, 732, 734). The

  A movable valve 74 that opens and closes the air passage is disposed inside the duct 73 (FIGS. 8B and 8C). The control means (control circuit) 6 controls the opening / closing operation of the shutter 75 and the opening / closing operation of the movable valve 74. The width 2w1 of the sheet-like workpiece 2 shown in FIG. 8B is larger than the width (suction area) of the central suction box 722 and larger than the total width (suction area) of the three suction boxes 721, 722, and 723. small. In this case, the shutter 75 is closed to restrict air from entering the duct 74 from the outside. This is to reduce the air leakage so that the vacuum suction machine 71 having a small capacity can be used for suction. Further, the width 2w2 of the sheet-like workpiece 2 shown in FIG. 8C is smaller than the width (suction area) of the central suction box 722. In this case, the movable valve 7412 on the side close to the vacuum suction device 71 of the duct 731 that connects the outer suction box 721 and the vacuum suction device 71 is closed, and the outer suction box 723 and the vacuum suction device 71 are connected. The movable valve 7432 on the side close to the vacuum suction device 71 of the duct 733 to be closed is closed. This is to close the movable valves 7412 and 7432 on the side closer to the vacuum suction device 71 to suppress the air volume and to reduce the power consumption of the vacuum suction device 71. When the lowermost sheet-like workpiece 2 is fed to the feed roller 101 side, or when the tip of the lowermost sheet-like workpiece 2 is aligned, the control means 6 has movable valves 7411 and 7421 on the side closer to the suction box 72. , 7431 are controlled to increase or decrease the suction force (arrow Yb) to the lowermost sheet-like workpiece 2. This is to speed up the reaction of the air suction operation by controlling the movable valves 7411, 7421, 7431 on the side close to the suction box 72.

  The major difference in the apparatus configuration between the sheet-like workpiece feeding device 1b of the present embodiment and the sheet-like workpiece feeding device 1a already described is that, in the sheet-like workpiece feeding device 1b of the present embodiment, the lifter 50 has a cross section. Is formed in a substantially triangular prism structure having a substantially triangular shape, and the suction box 72 is composed of three independent chambers 721, 722, and 723, and a movable valve 74 and a shutter 75 are disposed. It is a point. In addition, the device configuration of the device 1b not described above is the same as that of the device 1a.

(Sheet workpiece feeding method)
The sheet-like workpiece feeding method by the sheet-like workpiece feeding devices 1a and 1b according to one embodiment of the present invention will be described below.

(Sheet workpiece feeding method 1)
A sheet-like workpiece feeding method 1 by the sheet-like workpiece feeding device 1a according to the first embodiment of the present invention will be described below. FIG. 3 is a timing chart showing the operation of the sheet-like workpiece feeding device 1a according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view schematically showing the operation of the sheet-like workpiece feeding device 1a according to the first embodiment of the present invention from the side surface side.

  Hereinafter, in order to specifically describe the operation, the following setting conditions are used. The sheet length 2f in the conveying direction of the sheet-like workpiece 2 is set to 255 [mm] (2f = 255 [mm]), and the outer diameter of the tread surface 30a on the outer periphery of the paper feed roller 30 (the tread surface 30a is arranged on the entire circumference. In this case, the outer diameter 30D is set to 76.2 [mm] (30D = 76.2 [mm]). The printing speed Qp is 350 sheets / minute. The control means 6 controls the first paper feed roller 31 and the second paper feed roller 32 so that the phases of the first paper feed roller 31 and the second paper feed roller 32 always coincide with each other, and controls the third paper feed roller 33 to have a different phase. And the control means 6 controls the raising / lowering operation of the first lifter 51 and the second lifter 52 so as to always coincide, and controls the raising / lowering operation of the third lifter 53 differently. Since the sheet length 2f is short, the fourth paper feed roller 34 and the fourth lifter 54 are not involved in sheet feeding and are stopped.

  FIG. 3A shows a timing chart when the vertical axis is the rotational speed V of the paper feed roller 30 and the horizontal axis is the apparatus phase θ. FIG. 3B shows a timing chart when the vertical axis is the rotation amount δ of the paper feed roller 30 and the horizontal axis is the apparatus phase θ. FIG. 3C shows a timing chart when the vertical axis is the amount L of the sheet-like workpiece 2 fed by the paper feed roller 30 and the horizontal axis is the apparatus phase θ. The lowermost sheet-like workpiece 2 of the laminated sheet-like workpieces 12 is in contact with the upstream side surface 9d of the gate plate 9 whose tip 2c is a preset reference position, as in the alignment method described later. It is assumed that the position is accurately aligned on the position 9p-9p line (see FIG. 4A).

  FIG. 4A shows the initial phase θ1 = 0 [°] of the apparatus 1b, the contact phase 31K1 = 5 [°] between the first paper feed roller 31 and the lowermost sheet-like workpiece 2, and the same. The contact phase 32K1 between the second paper feed roller 32 and the lowermost sheet-like work 2 is 5 [°]. The contact phase 33K1 = 122 [°] between the third paper feed roller 33 and the lowermost sheet-like work 2 is set. The contact phase 33K1 of the third paper feed roller 33 is larger than the contact phase 32K1 of the second paper feed roller (33K1> 32K1). This is because the sheet length upstream of the third paper feed roller 33 out of the sheet length 2f in the conveying direction of the sheet-like workpiece 2 is the circumference of the tread surface 33a on the outer periphery of the third paper feed roller 33. Therefore, when the lowermost sheet-like workpiece 2 is fed out, the rear end 33a2 of the outer tread surface 33a of the third paper feed roller 33 and the rear end 2d of the lowermost sheet-like workpiece 2 are substantially coincident with each other. Thus, even when the next sheet is lowered, it is prevented from contacting the tread surface 33a. The contact phase 34K1 between the fourth paper feed roller 34 and the lowermost sheet-like workpiece 2 is 345 [°]. This is because the upper surface side of the fourth paper feed roller 34 is a notch surface 34 b that does not protrude from the opening 4 h of the table 4, and is stopped at a position where it does not contact the stacked sheet-like workpieces 12. The four lifters 51, 52, 53, and 54 are all incorporated in the apparatus 1a at a predetermined height P1 below the upper surface 4a of the table 4.

  The gate plate 9 is lowered below the upper surface 4a of the table 4, and the gate i is opened to a size that allows only the lowermost sheet-like workpiece 2 to pass through. The upper surface side of the paper feed rollers 31, 32, 33 is a tread surface 30 a and protrudes from the opening 4 h of the table 4. The control means 6 controls the vacuum suction machine 71 to increase the suction force (arrow Yb) to the lowermost sheet-like workpiece 2 and controls the roller driving means 31M, 32M, 33M to feed the feed rollers 31, 32, 33 is rotated, the tread surface 30a outside the sheet feed rollers 31, 32, 33 is brought into contact with the lowermost sheet-like workpiece 2 and the lowermost sheet-like workpiece 2 is fed by the frictional force acting between them. The feeding starts to the roller 101 side.

  The rotational speed V of the sheet feed rollers 31, 32, 33 is gradually accelerated from the start of feeding of the lowermost sheet-like workpiece 2, and the phase θ4 of the apparatus 1a = 59 [°], the feeding amount L of the sheet-like workpiece 2. At the time of = 86 [mm], the rotation speed Vk is reached and the rotation speed is constant (FIG. 3A). At the time of the phase θ4 = 59 [°] of the apparatus 1a, the contact phase 33K4 = 250 [°] of the third paper feed roller 33, and the upper surface side of the third paper feed roller 33 becomes the notch surface 3b. The rear end 33a2 of the tread surface 33a on the outer periphery of the third paper feed roller 33 and the rear end 2d of the lowermost sheet-like workpiece 2 substantially coincide with each other. On the other hand, the control means 6 controls the third lifter driving means 53M, and when the lowermost sheet-like work 2 is conveyed downstream from the position of the third paper feed roller 33 (apparatus phase θ3 = 40). [°]), the third lifter 53 is raised to a position of a predetermined height P2 above the upper surface 4a of the table 4 (see FIG. 4B). This is because the lowering of the stacked remaining sheets is restricted by raising the third lifter 53 so that the pressure applied by the remaining sheets is not applied in the vicinity of the rear end 2d of the sheet-like workpiece 2 to be fed out. is there.

  Then, the phase θ5 of the apparatus 1a = 81 [°], the contact phase 31K5 = 235 [°] of the paper feed roller 31, the contact phase 32K5 = 235 [°] of the paper feed roller 32, and the feed amount L = of the sheet-like workpiece 2 At the time of 153 [mm], the feeding operation of the lowermost sheet-like work 2 by the paper feed roller 30 is completed (FIG. 3B). The control means 6 controls the vacuum suction machine 71 to weaken the suction force (arrow Yb) to the lowermost sheet-like workpiece 2 and controls the roller driving means 30M to decelerate and stop the paper feed roller 30 (FIG. 3). (A)). At this time, the lowermost sheet-like workpiece 2 is transferred to the feed roller 101, and the feed roller 101 pulls out the lowermost sheet-like workpiece 2.

  When the feeding operation of the lowermost sheet-like workpiece 2 is completed, the upper surfaces of the paper feed rollers 31 and 32 become the notched surfaces 30b and do not protrude from the opening 4h of the table 4. When the lowermost sheet-like workpiece 2 is conveyed downstream from the positions of the first paper feed roller 31 and the second paper feed roller 32 (device phase θ6 = 91 °), the control means 6 The lifter driving means 51M and the second lifter driving means 52M are controlled to raise the first lifter 51 and the second lifter 52 above the upper surface 4a of the table 4, and the device phase θ7 = 111 [°]. Thus, the first lifter 51, the second lifter 52, and the third lifter 53 are positioned at a predetermined height P2 above the upper surface 4a of the table 4 (FIG. 4C). The control means 6 independently drives a plurality of lifter driving means 51M, 52M, 53M for driving the lifters, and the plurality of lifters 51, 52, 53 arranged in the lowermost layer corresponding to the stacking load of the sheet-like workpiece. Are lifted in order from the lifter (upstream lifter) that is removed from the sheet-like workpiece 2, so that the lowering of the stacked remaining sheets 12 is limited, and the pressure applied by the remaining sheets is near the rear end 2 d of the sheet-like workpiece 2 to be sent out. Try not to join.

  Then, the paper feed roller 30 stops at the phase θ10 = 140 [°] of the apparatus 1a (FIG. 3A). When the lowermost sheet-like workpiece 2 is transferred to the feed roller 101 and the rear end 2d of the lowermost sheet-like workpiece 2 is conveyed to the downstream side of the gate plate 9, the control means 6 is a gate plate driving means. The gate plate 9 is raised by controlling 9M, and the gate i is closed (FIG. 4D). The phase θ12 of the apparatus 1a = 324 [°], the contact phase 31K12 = 360 [°] of the paper feed roller 31, the contact phase 32K12 = 360 [°] of the paper feed roller 32, and the contact phase 33K12 = 477 of the paper feed roller 33. [°], and the upper surfaces of the paper feed rollers 31, 32, and 33 are all tread surfaces 30a.

  On the other hand, the control means 6 controls the lifter driving means 51M, 52M, 53M to lower the lifters 51, 52, 53 downward from the upper surface 4a of the table 4, and all the device phases θ11 = 160 [°]. The lifter 50 is positioned at a predetermined height P <b> 1 below the upper surface 4 a of the table 4. Then, the control means 6 controls the vacuum suction machine 71 to increase the suction force (arrow Yb) to the lowermost sheet-like workpiece 2, and the tread surface 30 a and the lowermost layer of each of the feed rollers 31, 32 and 33. The sheet-like workpiece 2 is brought into close contact, and the roller driving means 31M, 32M and 33M are controlled to rotate the sheet feeding rollers 31, 32 and 33 by a minute angle (minute rotation amount) δ1, thereby The advancing side tip 2c is brought into contact with the gate plate 9 (the guideline for δ1 is about 20 °). That is, the tip 2c of the lowermost sheet-like workpiece 2 is brought into contact with the upstream side surface 9d of the gate plate 9 which is a preset reference position and is accurately aligned on the reference position 9p-9p line (FIG. 4A )).

  According to the sheet feeding method 1 of the present invention, the control unit 6 controls the roller driving unit 30M (31M, 32M, 33M, 34M) to control the sheet feeding roller 30 (31, 32, 33, 34). The sheet-like workpiece 12 on which the lifter 50 is stacked is provided by intermittently rotating or controlling the lifter driving means 50M (51M, 52M, 53M, 54M) to move the lifter 50 (51, 52, 53, 54) up and down. The initial contact of the sheet feed roller 30 that makes the tread surface 30a on the outer periphery of the sheet feed roller 30 and the lowermost sheet-like workpiece 2 first contact with each other in a state where the position is raised to the position P2 higher than the upper surface 4a of the table 4 The phase 30K1 (31K1, 32K1, 33K1, 34K1) is adjusted to lower the lifter 50 to a position P1 lower than the upper surface 4a of the table 4, After starting the operation of feeding the lowermost sheet-like workpiece 2 to the feed roller 101 side with the tread surface 30a on the outer periphery of the roller 30 being on the upper surface side, the notch surface 30b on the outer periphery of the feed roller 30 is on the upper surface side and on the table 4 Is not in contact with the lowermost sheet-like work 2 that moves.

(Sheet workpiece delivery method 2)
A sheet-like workpiece feeding method 2 by the sheet-like workpiece feeding device 1b according to the second embodiment of the present invention will be described below. FIG. 9 is a timing chart showing the operation of the sheet-like workpiece feeding device 1b according to the second embodiment of the present invention. FIG. 10: is sectional drawing which shows typically operation | movement of the sheet | seat workpiece | work delivery apparatus 1b of the 2nd Embodiment of this invention from the side surface side.

  Hereinafter, in order to specifically describe the operation, the following setting conditions are used. The sheet length 2f in the conveying direction of the sheet-like workpiece 2 is set to 741 [mm] (2f = 741 [mm]), and the outer diameter of the tread surface 30a on the outer periphery of the paper feed roller 30 (the tread surface 30a is arranged on the entire circumference. In this case, the outer diameter 30D is set to 76.2 [mm] (30D = 76.2 [mm]). The printing speed Qp is 350 sheets / minute. The control means 6 controls the four paper feed rollers 30 (31, 32, 33, 34) so that their phases are always matched. The control means 6 controls the up / down movement of the downstream lifters 501 and 502 and the up / down movement of the upstream lifters 503 and 504 differently.

  FIG. 9A shows a timing chart when the vertical axis is the rotation speed V of the paper feed roller 30 and the horizontal axis is the apparatus phase θ. FIG. 9B shows a timing chart when the vertical axis is the rotation amount δ of the paper feed roller 30 and the horizontal axis is the apparatus phase θ. FIG. 9C shows a timing chart when the vertical axis is the amount L of the sheet-like workpiece 2 fed by the paper feed roller 30 and the horizontal axis is the apparatus phase θ. The lowermost sheet-like workpiece 2 of the laminated sheet-like workpieces 12 is in contact with the upstream side surface 9d of the gate plate 9 whose tip 2c is a preset reference position, as in the alignment method described later. It is assumed that the position is accurately aligned on the position 9p-9p line (see FIG. 10A).

  FIG. 10A shows a state in which the initial phase θ1 = 0 [°] of the apparatus 1c and the contact phase 30K1 = 5 [°] between the sheet feeding roller 30 and the lowermost sheet-like workpiece 2 are illustrated. The gate plate 9 is lowered below the upper surface 4a of the table 4, and the gate i is opened to such a size that only the lowermost sheet-like workpiece 2 can pass through. Both the downstream lifters 501 and 502 and the upstream lifters 503 and 504 are incorporated in the table 4 at a predetermined height P1 below the upper surface 4a of the table 4. The upper surface side of the paper feed roller 30 is a tread surface 30 a and protrudes from the opening 4 h of the table 4. The control means 6 controls the vacuum suction machine 71 and the movable valve 74 to strengthen the suction force (arrow Yb) to the lowermost sheet-like workpiece 2 and controls the four roller driving means 30M to provide four paper feed rollers. 30 is rotated synchronously, the outer tread surface 30a of the four paper feed rollers 30 and the lowermost sheet-like workpiece 2 are brought into contact with each other, and the lowermost sheet-like workpiece 2 is fed by the frictional force acting between them. The transmission starts on the 101 side.

  The rotational speed V of the sheet feeding roller 30 is gradually accelerated from the start of feeding of the lowermost sheet-like workpiece 2, and the phase θ3 = 59 [°] of the apparatus 1 b and the feeding amount L of the sheet-like workpiece 2 = 86 [mm]. ], The rotation speed Vk is reached and the rotation speed is constant (FIG. 9 (a)). When the phase θ4 of the apparatus 1b = 81 [°], the contact phase 30K4 = 235 [°] of the paper feed roller 30, and the feeding amount L of the sheet-like work 2 L = 153 [mm], The feeding operation of the lower sheet-like workpiece 2 is completed. When the feeding operation of the lowermost sheet-like workpiece 2 by the paper feed roller 30 is completed, the upper surface side of the paper feed roller 30 becomes a notch surface 30b and does not protrude from the opening 4h of the table 4. Then, the control means 6 controls the vacuum suction machine 71 and the movable valve 74 to weaken the suction force (arrow Yb) to the lowermost sheet-like workpiece 2 and controls the four roller driving means 30M to provide the four feeds. The paper roller 30 is decelerated and stopped (FIG. 9A). At this time, the lowermost sheet-like workpiece 2 is transferred to the feed roller 101, and the lowermost sheet-like workpiece 2 is pulled out by the feed roller 101. Then, the paper feed roller 30 stops at the phase θ6 = 140 [°] of the apparatus 1b and the contact phase 30K6 = 345 [°] of the paper feed roller 30 (FIG. 10A).

  When the lowermost sheet-like workpiece 2 is conveyed downstream from the position of the third paper feed roller 33 (device phase θ6 = 209 °), the control means 6 controls the upstream lifter drive means 53M. The upstream lifters 503 and 504 are raised above the upper surface 4 a of the table 4, and the upstream lifters 503 and 504 are at a predetermined height above the upper surface 4 a of the table 4 at the apparatus phase θ7 = 256 °. It becomes the position of P2 (FIG. 10B). This is because the lifters 503 and 504 on the upstream side are raised to limit the lowering of the stacked remaining sheets so that the pressure applied by the remaining sheets is not applied in the vicinity of the rear end 2d of the sheet-like workpiece 2 to be delivered. Because.

  When the lowermost sheet-like work 2 is conveyed downstream from the position of the first paper feed roller 31 (apparatus phase θ7 = 256 [°]), the control means 6 causes the downstream lifter drive means 51M. And the downstream lifters 501 and 502 are raised above the upper surface 4 a of the table 4, and the downstream lifters 501 and 502 are moved from the upper surface 4 a of the table 4 at the apparatus phase θ8 = 276 [°]. Is also a position of a predetermined height P2 above (FIG. 10C).

  When the lowermost sheet-like workpiece 2 is transferred to the feed roller 101 and the rear end 2d of the lowermost sheet-like workpiece 2 is conveyed to the downstream side of the gate plate 9, the control means 6 is a gate plate driving means. The gate plate 9 is raised by controlling 9M, and the gate i is closed (FIG. 10 (d)).

  When all the lifters 50 are located at a predetermined height P2 above the upper surface 4a of the table 4 and the stacked sheet-like workpieces 12 are separated from the tread surface 30a on the outer periphery of all the paper feed rollers 30 (device phase θ8 = 276 [°]), the control means 6 controls all the roller driving means 30M to rotate the paper feed roller 30 by a minute angle (minute rotation amount) δ2 and feed the paper at the apparatus phase θ10 = 304 [°]. The contact phase 30K10 of the roller 30 is set to 360 [°] (FIG. 10A). This is a preparatory operation for bringing the advancing side tip 2c of the lowermost sheet-like workpiece 2 described later into contact with the gate plate 9.

  Then, the control means 6 controls the lifter driving means 51M and 53M to lower all the lifters 50 below the upper surface 4a of the table 4, and all the lifters 50 are moved at the apparatus phase θ11 = 324 [°]. It becomes the position of the predetermined height P1 below the upper surface 4a of the table 4 (FIG.14 (d)). The control means 6 controls the vacuum suction machine 71 and the movable valve 74 to increase the suction force (arrow Yb) to the lowermost sheet-like workpiece 2, and the tread surface 30 a and the lowermost layer of all the paper feed rollers 30. The sheet-like workpiece 2 is brought into close contact with each other, and all the roller driving means 30M are controlled to rotate the paper feed roller 30 by a minute angle (minute rotation amount) δ1, thereby moving the leading end 2c of the lowermost sheet-like workpiece 2 to the advancing side. Contact with the gate plate 9 (estimated value of δ1 is about 20 [°]). That is, the tip 2c of the lowermost sheet-like workpiece 2 is brought into contact with the upstream side surface 9d of the gate plate 9 which is a preset reference position and is accurately aligned on the reference position 9p-9p line (FIG. 10A )).

  According to the sheet work feeding method 2 of the present invention, the control means 6 controls all the roller driving means 30M to rotate the paper feed roller 30 by a minute angle (minute rotation amount) δ1, so that the lowermost layer is fed. The front end 2c of the sheet-like workpiece 2 can be brought into contact with the gate plate 9.

(Difference in outer diameter of paper feed roller)
By comparing the sheet-like workpiece 2 feeding operation by the sheet-like workpiece feeding device 1 of the present invention with the sheet-like workpiece 2 feeding operation by the conventional device, the sheet-like workpiece feeding device 1 of the present embodiment is compared. The difference in outer diameter between the paper feed roller 30 and the conventional paper feed roller will be described below. FIG. 11 is a timing chart illustrating the operation of the paper feed roller 30 in the sheet-like workpiece feeding apparatus 1 according to the embodiment of the invention. FIG. 12 is a timing chart showing the operation of the conventional paper feed roller in the conventional device (the device described in Patent Document 3) in which the conventional paper feed roller rotates at a constant speed. FIG. 13 shows a conventional device that shows an acceleration / deceleration pattern in which the conventional paper feed roller accelerates at the start of feeding of the sheet-like workpiece 2 and decelerates immediately before the start of feeding of the next sheet-like workpiece (device described in Patent Document 6). 10 is a timing chart showing the operation of the conventional paper feed roller in FIG. The hatched areas in FIGS. 11 to 13 indicate the circumferential lengths of the paper feed rollers of the respective apparatuses. Each of the vertical axes in FIGS. 11 to 13 represents the rotation speed V of the paper feed roller, and each of the horizontal axes in FIGS. 11 to 13 represents the apparatus phase θ.

  The apparatus described in Patent Document 3 is a mechanism in which a plurality of paper feed rollers rotate at a constant speed. In the section where the apparatus phase θ shown in FIG. 12 is 0 [°] to 360 [°], a plurality of paper feed rollers are always present. It rotates at the same speed Vk as the printing cylinder. In the area indicated by hatching in FIG. 12, the feed roller always rotates at the same speed Vk as the printing cylinder, so the outer diameters of the plurality of feed rollers and the printing cylinder must be equal. For this reason, the outer diameter of the paper feed roller becomes large, and a plurality of paper feed rollers cannot be disposed physically close to the conveying direction of the sheet-like workpiece 2, and is near the front end of the sheet-like workpiece 2. The sheet-like workpiece 2 cannot be fed out by concentrating the driving force of a plurality of paper feed rollers. Further, it is impossible to instantaneously accelerate the stationary sheet-like work 2 at the same speed as the printing cylinder, and slip occurs. Positional accuracy cannot be ensured due to variations in this slip. That is, it is difficult for the sheet-like workpiece 2 to be fed out stably. In addition, since a plurality of paper feed rollers having a large outer diameter are arranged, a large sheet-like workpiece feeding device is formed.

  In the apparatus described in Patent Document 6, the acceleration / deceleration pattern is such that a plurality of paper feed rollers accelerate at the start of feeding of the sheet-like workpiece 2 and decelerate immediately before the start of feeding of the next sheet-like workpiece 2, and therefore are shown in FIG. Among the sections where the apparatus phase θ is 0 [°] to 360 [°], it is possible to slightly shorten the section where the plurality of paper feed rollers rotate at the same speed Vk as the printing cylinder. The area shown is only about 20% smaller than the area shown by hatching in FIG.

  In the sheet-like workpiece feeding apparatus 1 according to the present embodiment, the sheet feeding roller 30 is accelerated at the start of feeding of the sheet-like workpiece 2, decelerated and stopped immediately after the feeding of the sheet-like workpiece 2 is completed, and the next sheet-like workpiece 2 is fed. Since it is possible to wait arbitrarily until the start, the section in which the plurality of paper feed rollers 30 rotate at the same speed Vk as the printing cylinder in the section where the apparatus phase θ shown in FIG. 11 is 0 [°] to 360 [°]. The area shown by hatching in FIG. 11 is about 80% smaller than the area shown by hatching in FIG. Therefore, the outer diameter of the paper feed roller 30 of the present invention can be set to about 1/5 or less of the outer diameter of the paper feed roller of the apparatus described in Patent Document 3, and the paper feed of the apparatus described in Patent Document 6 can be reduced. The outer diameter of the roller can be reduced to about 1/4 or less. Therefore, by arranging the plurality of sheet feeding rollers 30 so as to be physically close to the conveying direction of the sheet-like workpiece 2, the driving force of the plurality of sheet feeding rollers 30 is concentrated near the front end of the sheet-like workpiece 2. Since the sheet-like workpiece 2 is fed out, the sheet-like workpiece 2 is sent out in a small sheet-like workpiece feeding device 1 with a stable feeding, and even a sheet-like workpiece having a short sheet length 2f can be fed out stably.

  As described above, the present invention is not limited to the embodiment described above. When the sheet length 2f of the sheet-like workpiece 2 is longer than a predetermined range (for example, 2f = 970 [mm]), the gate plate 9 is accommodated and only the downstream side feed roller 31 is controlled. The tip 2c of the lowermost sheet-like workpiece 2 can be finely adjusted to the reference position. In addition, it is naturally applicable that the sheet-like workpiece feeding method 1 is performed by the sheet-like workpiece feeding device 1b. Naturally, it is also possible to apply mechanisms such as the movable valve 74 and the shutter 75 provided in the sheet-like workpiece feeding device 1b to the sheet-like workpiece feeding device 1a. Thus, it goes without saying that the present invention can be modified as appropriate without departing from the spirit of the present invention.

It is a perspective view which shows typically the delivery apparatus of the sheet-like workpiece | work of one Embodiment to which this invention is applied. It is sectional drawing which shows typically the delivery apparatus of the sheet-like workpiece | work of the said embodiment from the side surface side. It is a timing chart which shows operation | movement of the delivery apparatus of the sheet-like workpiece | work of the said embodiment. It is sectional drawing which shows typically operation | movement of the delivery apparatus of the sheet-like workpiece of the said embodiment from the side surface side. It is a perspective view which shows typically the delivery apparatus of the sheet-like workpiece | work of other embodiment to which this invention is applied. It is a perspective view which shows typically the lifter drive system of the delivery apparatus of the sheet-like workpiece | work of the said embodiment. It is sectional drawing which shows typically the delivery apparatus of the sheet-like workpiece | work of the said embodiment from the side surface side. FIG. 8A is a plan view schematically showing the sheet-like workpiece feeding device according to the above embodiment, and FIGS. 8B and 8C are diagrams in which the sizes of the sheet-like workpieces are different. It is a partial cross section arrow view of (a). It is a timing chart which shows operation | movement of the delivery apparatus of the sheet-like workpiece | work of the said embodiment. It is sectional drawing which shows typically operation | movement of the delivery apparatus of the sheet-like workpiece of the said embodiment from the side surface side. 6 is a timing chart illustrating the operation of a sheet feeding roller in the sheet workpiece feeding device of the embodiment. It is a timing chart which illustrates operation of a paper feed roller in a conventional sheet-like work sending device. It is a timing chart which illustrates operation of a paper feed roller in a conventional sheet-like work sending device.

Explanation of symbols

1, 1a, 1b Sheet-like workpiece feeding device,
2 sheet-like workpiece (the lowermost sheet-like workpiece),
12 laminated sheet-like workpieces,
30, 31, 32, 33, 34 Paper feed roller,
30a tread surface,
30b Notched surface,
30M roller drive means (roller drive motor),
4 tables,
4a The top surface of the table,
50, 51, 52, 53, 54 Lifter,
50M lifter drive means (roller drive motor),
6 Control means (control circuit),
70 suction means (vacuum suction device),
8 Front gauge,
9 Gate plate,
9M gate plate driving means,
θ device phase,
Contact phase with the lowermost sheet-like workpiece of the 30K paper feed roller,
30K1 initial contact phase of paper feed roller,
δ angle (rotation)

Claims (10)

Among the stacked sheet-like workpieces, there are provided a sheet feeding roller for feeding the lowermost sheet-like workpiece to the feed roller side, a roller driving means for rotating the sheet feeding roller, and an opening for exposing the upper surface side of the sheet feeding roller. And a lifter driving means for moving the lifter up and down, and the lifter and the paper feed in the transport direction of the lowermost sheet work roller using dispensing apparatus arrayed sheets like work alternately, the lifter driving means you drive the lifter by independently driven, from the lifter rear end of the lowermost sheet-shaped workpiece to be fed is out A method for feeding a sheet-like work, wherein the sheet-like work is raised in order from the upper surface of the table . Among the stacked sheet-like workpieces, there are provided a sheet feeding roller for feeding the lowermost sheet-like workpiece to the feed roller side, a roller driving means for rotating the sheet feeding roller, and an opening for exposing the upper surface side of the sheet feeding roller. And a lifter driving means for moving the lifter up and down, and the lifter and the paper feed in the transport direction of the lowermost sheet work roller with feeding of a sheet workpiece which are arrayed alternately, each was independently driving the roller driving means Ru is intermittently rotating the feed roller, the trailing edge of the lowermost sheet-shaped workpiece is outside fed A sheet-like work feeding method, wherein the sheet-like work is stopped in order from the paper feed roller. Among the stacked sheet-like workpieces, there are provided a sheet feeding roller for feeding the lowermost sheet-like workpiece to the feed roller side, a roller driving means for rotating the sheet feeding roller, and an opening for exposing the upper surface side of the sheet feeding roller. And a lifter for lifting and lowering the lifter, and the outer periphery of the paper feed roller protrudes from the opening of the table to the uppermost position. A sheet comprising a tread surface that comes into contact with a lower sheet-like workpiece and a notch surface that does not protrude from the opening of the table, and a plurality of the lifters and the feed rollers are alternately arranged in the conveying direction of the lowermost sheet-like workpiece. with Jo workpiece feeding device, a position higher than the upper surface of the table a sheet workpiece which the control unit is stacked by the lifter The initial contact phase of the paper feed roller that first contacts the tread surface on the outer periphery of the paper feed roller and the lowermost sheet-like workpiece in the held state is adjusted, so that the lifter is positioned lower than the upper surface of the table. After completing the operation of bringing the tread surface on the outer periphery of the paper feed roller into contact with the lowermost sheet-like workpiece in the lowered state and feeding it to the feed roller side, the notch surface on the outer periphery of the paper feed roller is set to the upper surface side. Thus, the sheet-like workpiece feeding method is characterized in that the sheet feeding roller is not brought into contact with the lowermost sheet-like workpiece moving on the table. 4. The sheet workpiece feeding method according to claim 3, wherein the initial contact phase of the sheet feeding roller that makes the sheet feeding roller and the lowermost sheet workpiece first contact each other is varied. The sheet-like workpiece feeding device is provided with suction means below the table to bring the lowermost sheet-like workpiece into contact with the tread surface on the outer periphery of the sheet feeding roller by sucking from the opening of the table. after the lowermost sheet-shaped workpiece is fed to the feed roller side by the feed roller, from claim 1, characterized in that weaken the suction force to the lowermost sheet-shaped workpiece to be displaced on the table 4 The sheet-like workpiece feeding method according to any one of the above. Among the stacked sheet-like workpieces, there are provided a sheet feeding roller for feeding the lowermost sheet-like workpiece to the feed roller side, a roller driving means for rotating the sheet feeding roller, and an opening for exposing the upper surface side of the sheet feeding roller. A table having a lift, a lifter for lifting and lowering the lifter, and a control for controlling the roller drive to rotate the paper feed roller intermittently. And a control means for moving the lifter up and down by controlling the lifter driving means, and a plurality of the lifters and the feed rollers are alternately arranged in the conveying direction of the lowermost sheet-like workpiece, with you drive lifter driving means for independently driving, the configuration of the roller driving means Ru is intermittently rotating the feed roller is independently driven DOO sheet workpiece delivery device according to claim. Claim 6, wherein the outer periphery of the paper feed roller ing from cut edge does not project from the opening of the tread surface and the table in contact with the lowermost sheet workpiece protruding from the opening of said table Sheet-like workpiece feeding device.   The upper surface of the table is a shape or material having a small friction coefficient with the sheet-like workpiece, and the upper surface of the lifter is a shape or material having a large friction coefficient with the sheet-like workpiece. 7. A sheet-like workpiece feeding device according to item 7.   The cross section of the lifter is formed in a substantially triangular prism structure having a substantially triangular shape, and is arranged so that one surface of the substantially triangular prism is an upper surface, and a lower surface side of the substantially triangular prism is connected to the lifter driving means. The sheet-like workpiece feeding device according to any one of claims 1 to 8. From claim 6, characterized in that the suction means for contacting the lowermost sheet workpiece on the tread surface of the feed roller periphery by sucking through the opening of the table that are equipped below the table 9 The sheet-like workpiece feeding device according to any one of the preceding claims.

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