JP6511670B2 - Automatic feeding device for pouch - Google Patents

Description

  The present invention relates to an automatic feeding apparatus for pouches which separates and feeds pouches one by one from a stacker on which a large number of pouches are loaded.

  As a conventional automatic feeding device for pouches of this type, for example, a bag feeding device as described in Patent Document 1 is known. In this bag feeding apparatus, a large number of packaging bags (pouches) are loaded in a horizontal posture in a vertically extending stacker, and the peripheral edge of the lowermost pouch is a receiving piece provided around the bottom end of the stacker. It is supported. Then, the lower surface of the lowermost pouch is suctioned by a suction cup disposed below the stacker, and moved to the transfer position by the lever, so that the periphery of the lowermost pouch is removed from the receiving piece and separated from the upper pouch It is designed to be transported to the lower transport position.

  However, in such a bag feeding apparatus, since the loading pressure of a large number of stacked pouches is applied to the lowermost packaging bag, depending on the number of sheets loaded, the packaging bags are in close contact and the lower pouch is separated. The upper pouch may also fall off the receiving piece. In addition, since the lower surface of the lowermost pouch is not constant, there is also a problem in that the suction can not be performed and an empty swing occurs.

  In addition, since the portion of the pouch adsorbed by the suction cups has variations, the tip position of the transferred pouch is unknown, and if it is necessary to determine the tip position in a later step, the step of defining the tip position is essential. there were. In addition, the suction cups wear quickly, requiring replacement work in a short period, and there is a problem that the productivity is reduced.

  On the other hand, according to Patent Document 2, an eccentric cam is brought into sliding contact with the lowermost pouch of a large number of synthetic resin bags (pouches) stacked in a bag magazine without using a suction cup, and the sliding friction force An apparatus for separating and feeding pouches is described which separates the lower pouches and discharges them one by one from a feed port provided near the bottom of the bag magazine.

  In particular, in order to disperse the stack pressure of stacked pouches, the bag magazine is inclined at a predetermined angle with respect to the horizontal plane, and when separating the lowermost pouch, compression is made from the outside of the bag magazine toward the supply port. The air is blown to lift the upper pouch.

  And in such a separate feeding apparatus, if an eccentric cam is used, the pouch can be delivered at high speed, which is advantageous in productivity, but the upper pouch is lifted by compressed air at the time of separation. However, the variation in the friction force between the pouch and the eccentric cam is large, and also it is easy to cause idle feeding and double sheet feeding.

  In addition, since the tip position of the pouch becomes unclear because the friction is caused by the eccentric cam and the pouch, and when the timing to send the pouch in the next step is matched, a mechanism is needed separately to adjust the tip position in accordance with the next step operation. Become.

Japanese Patent Application Laid-Open No. 8-72822 Japanese Patent Laid-Open No. 5-58458

  The present invention has been made to solve the above-mentioned problems of the prior art, and its object is to reduce the load pressure when loading a large amount of pouches, and to reliably separate the pouches one by one. Another object of the present invention is to provide an automatic feeding device for pouches capable of feeding out the tip position of the separated pouch at a fixed position.

In order to achieve the above object, the present invention is
It has a lower guide for guiding the lower end of the stacked pouches, a side guide for guiding the left and right side edges of the pouch, and a reference plate for supporting the front of the leading pouch in the vertical position to be in a predetermined standing posture. A pouch stopper for determining the position of the lower end of the leading pouch at the front end of the lower guide, and a stacker provided with an outlet which exposes a lower region including the lower end of the leading pouch below the reference plate;
A feed roll disposed facing the take-out port, the peripheral surface facing the take-out port rotating upward from below, and an upper nip roll pressed against the upper part of the feed roll;
The feed roll is provided with a small diameter step at a position corresponding to the lower guide, and the pouch stopper enters the small diameter step in a free state, and the contact surface facing the leading pouch of the pouch stopper is the feed It has an arc shape that is flush with the outer peripheral surface of the roll,
An outer peripheral surface of the feed roll, the engaging projection projecting radially outward to engage from below the lower end of the top pouch positioned by said pouch stopper, the rotation direction downstream side with respect to the engaging projections And an engaging groove formed adjacent to the opening.
According to the present invention, the stack pressure applied to the leading pouch can be significantly reduced by vertically laying the leading pouch of the overlapped pouch in the stacker. Further, by rotating the feed roll and engaging the engagement protrusion with the lower end portion of the leading pouch, it can be reliably separated, and the pouch can be taken out at high speed. Furthermore, the lower end portion of the pouch is engaged with the engagement groove adjacent to the engagement projection, and is fed to the nip portion with the upper nip roll, so that the front end position of the separated pouch can be fixed without deviation.

Further, the present invention can be configured as follows.
1) The upper surface of the lower guide is curved in an arc shape in which the inclination angle gradually increases from the front end toward the upstream side.
In this way, the lower end and the upper end of the pouch come in close contact with each other, and even if the pouch is a self-supporting pouch having a double-folded bottom gusset, the thin upper end side becomes sparse and falls back and forth It can prevent.
2) A pair of transport rolls whose circumferential speed rotates faster than the feed roll is disposed downstream of the feed roll in the transport direction, and the upper nip roll is a roll relative to the roll axis to which the driving force is transmitted. It is mounted via a one-way clutch that allows rotation in the direction of rotation faster than the shaft and prevents rotation in the opposite direction.
In this way, the pouch can be fed downstream at high speed.
3) The feed roll is mounted on a roll shaft to which a driving force is transmitted, and is partially in pressure contact with the upper nip roll, and the roll shaft has the same diameter as the feed roll and the upper nip roll. A lower nip roll to be press-contacted is coaxially mounted via a one-way clutch, and the one-way clutch allows rotation in a direction rotating at a higher speed than the roll shaft and prevents rotation in the opposite direction.
In this way, the lower end portion of the leading pouch sent in a state engaged with the engagement groove is not only the nip between the feed roll and the upper nip roll but also the nip between the upper nip roll and the lower nip roll. It can be gripped reliably, and the conveying power can be increased.
4) The lower part of the lower guide of the stacker is pivoted about the rotation axis orthogonal to the arrangement direction of the pouch, and the tip part enters from the lower side of the lower guide to the upper side of the upper surface of the lower guide, There is provided a forward feeding mechanism provided with a feeding member which rotates in the direction of sequentially moving the pouch loaded on the lower guide to the downstream side.
In this manner, after the leading pouch is separated and fed, the pouch which is to be the leading pouch next can be sequentially pressed against the reference plate and the stopper for positioning.
5) A return restricting mechanism comprising a restricting member engaged with the side guide of the stacker with the side edge of the overlapped pouch to allow the pouch to move downstream and block the upstream movement. It is provided.
In this way, it is possible to suppress the return of the sequentially fed pouch to the upstream side.
6) An eccentric assist roller having a maximum diameter and a minimum diameter symmetrically with respect to the rotation center is disposed on the reference plate, and the maximum diameter rotates in a direction to push downward on the front surface of the leading pouch. Do.
In this way, when the leading pouch in the vertical position is separated by the feed roll, it can be separated more surely and the pouch can be taken out at high speed.

  According to the present invention, the loading pressure can be reduced when a large amount of pouches are loaded, moreover, the pouches can be reliably separated one by one, and the tip position of the separated pouches can be delivered at a fixed position.

BRIEF DESCRIPTION OF THE DRAWINGS (A) is a side view which shows typically the whole structure of the automatic feed apparatus of the pouch which concerns on embodiment of this invention, (B) is a top view of a pouch. (A) is a top view of FIG. 1, (B) is a bottom view of FIG. (A) is a front view of the feed roll and upper and lower nip rolls of FIG. 1, (B) is a B-B line cutting end view of (A), (C) is C- of (A). C line cut end view. The figure which shows a separation conveyance, (A) is an origin position, (B) is in rotation conveyance, (C) shows a nip completion position. The figure which shows a speed-up conveyance mechanism. The figure which shows the other structural example of a push-up force relaxation mechanism.

Below, the automatic feed device for pouches of the present invention will be described in detail based on the illustrated embodiment.
1 and 2 schematically show the automatic feed device for pouches of the present invention.
In FIG. 1A, reference numeral 1 denotes the entire pouch automatic feeding apparatus, and the pouch automatic feeding apparatus 1 includes a stacker 10 that stores a large number of pouches P in an overlapping manner, and a top pouch placed vertically from the stacker 10 A feed roll 30 for separating and taking out P1 one by one and a separation feeding mechanism 20 provided with an upper nip roll 40 are provided.

The stacker 10 supports a plurality of lower guides 12 for guiding the lower end portion of the stacked pouches P, a pair of left and right side guides 14 for guiding the left and right side edges of the pouches P, and a front surface of the leading pouch P1 in a vertically placed state. And a reference plate 16 for setting the front pouch P1 in a predetermined standing posture, and the lower portion including the front end of each lower guide 12 and the lower end of the front pouch P1 is exposed below the reference plate 16 18 are provided.
The pouch P loaded on the stacker 10 is, for example, an empty pouch obtained by planarly folding a so-called freestanding pouch provided with a double-folded bottom gusset portion 103 as shown in FIG. 1 (B). The left and right side edges of the films 101, 101 are sealed by the side seal portion 102, the bottom gusset portion 103 in the form of a fold at the lower end is sealed by the bottom seal portion 104, and the upper end is an opening for filling. Then, the lower guide 12 is loaded with the end portion on the bottom gusset portion 103 side as the lower end.

As shown in FIG. 2, three lower guides 12 are arranged between the left and right side guides 14 and 14 at a predetermined interval, and the side guides 14 are connected by connecting bars 124 at appropriate places in the length direction. Is integrally connected to the The upper surface 12a of each lower guide 12 is a smooth surface on which the lower end of the pouch P slides, and is curved in an arc shape in which the inclination angle gradually increases from the front end toward the lower back upstream side.
The curved shape is an arc shape that matches the shape of the lower end of the pouch group PA formed into a fan-shaped bundle by bringing the lower end portion and the upper end portion of the front and rear pouches P into close contact. That is, since the pouch P has the bottom gusset portion 103, the thickness of the lower end portion is thicker than the thickness of the upper end portion, and when the lower end portion and the upper end portion of the plurality of pouches P are closely stacked, it has a fan shape. By bending according to the curvature of the lower end portion of the pouch group PA, when the pouch P is loaded, the lower end portion and the upper end portion are in close contact at an even density, and the pouch P does not fall down due to the difference in density.

At the front end of each lower guide 12, a pouch stopper 13 for determining the position of the lower end of the leading pouch P1 is provided. The pouch stopper 13 has a shape projecting in an L shape from the upper surface 12a of the lower guide 12, and the contact surface with which the lower end of the leading pouch P1 abuts has an arc shape flush with the outer peripheral surface of the feed roll 30. There is.
The side guide 14 has a fan shape supporting half the height from the lower end of the pouch P, and the lower end edge has an arc shape following the lower guide 12 and the upper end edge has a concentric small diameter arc shape. In addition, on the outer side surface of the side guide 14, a plurality of support columns 122 for supporting the entire stacker 10 is appropriately provided.

The reference plate 16 is fixed so as to connect the front end portions of the side guides 14, and the upper end side is an inclined surface which is inclined to the upstream side, and the front surface of the leading pouch P1 abuts on the reference plate 16 The position and posture of the leading pouch P1 are determined.
At the upper end of the reference plate 16, an upper guide 17 for guiding the upper end portion of the pouch P aligned near the front end of the loaded pouch group PA is provided. The upper guide 17 holds the upper end of the leading pouch P1 so that the leading pouch P1 does not float up, and the lower surface 17a thereof is an inclined surface which is gradually inclined downward toward the leading end. The leading pouch P1 is guided along the lower surface 17a of the upper guide 17 to the far end. The upper guides 17 are provided at two left and right ends of the upper edge of the reference plate 16, and the upper ends of the highly rigid side seal portion 102 of the leading pouch P1 and the subsequent pouch are guided.

In addition, the midway portion of the upper end of the reference plate 16 and the lower end on the side of the takeout opening 18 absorbs the push-up force and relieves when lifting the leading pouch P1 in the vertically placed state to be described later. A relief opening 19 for releasing the flexure W of the pouch P1 is provided as a push-up force relief mechanism.
Further, an eccentric assist roller 15 is provided between the lower end of the reference plate 16 and the escape opening 19. The eccentric assist roller 15 symmetrically includes the maximum diameter portion 15a and the minimum diameter portion 15b with respect to the center of rotation, and the engaging projection 31 of the feed roll 30 engages with the lower end portion of the leading pouch P1 and ascends In this case, the largest diameter portion 15a enters the front side of the front pouch P1 from the notch 15c provided in the reference plate 16, and pushes the center portion of the front surface of the front pouch P1 upstream while feeding it downward Rotate.

Next, the configuration of the separating and feeding mechanism 20 will be described with reference to FIGS. 2 and 3.
The separating and feeding mechanism 20 includes a feed roll 30 whose circumferential surface facing the takeout port 18 rotates upward from below and an upper nip roll 40 in pressure contact with the upper portion of the feed roll 30.
The feed roll 30 is a cylindrical body formed of metal, hard resin or the like, and its outer peripheral surface is in a positional relationship in which the lower end of the leading pouch P1 positioned by the pouch stopper 13 is in contact. In this embodiment, the rotation center of the roll shaft 32 is disposed on the horizontal line of the lower end of the leading pouch P1.

The feed roll 30 is not in contact with the lower end full width of the leading pouch P1, but is partially attached to the central area in the width direction (see FIG. 2A) and mounted on the roll shaft 32 to which the driving force is transmitted. It is done. Although the roll shaft 32 is not particularly illustrated, the drive force of the motor is transmitted by a drive transmission mechanism such as a gear.
A small diameter step 35 is provided at the center of the feed roll 30 at a position corresponding to the lower guide 12 at the center, and the pouch stopper 13 at the tip of the lower guide 12 does not interfere with the small diameter step 35. The contact surface of the pouch stopper 13 facing the front pouch P1 of the pouch stopper 13 is flush with the outer peripheral surface of the feed roll 30.

In addition, on the circumferential surface of the feed roll 30, a finger head shaped engagement protrusion 31 which protrudes radially outward and engages with the lower end portion of the leading pouch P1 positioned by the pouch stopper 13; A notch-shaped engaging groove 33 is provided adjacent to the downstream side in the rotational direction with respect to 31 and with which the lower end portion of the leading pouch P1 is engaged.
The engaging projections 31 are provided at two positions in the range not reaching the full length in the axial direction from both axial end portions of the feed roll 30 to the small diameter step portion 35, and the protruding height from the feed roll 30 is the leading pouch The height is set so as to engage with the lower end portion of P1.
The engaging projection 31 may be provided at one position from the end of the feed roll 30, the entire axial length of the feed roll 30, or a gap from both the end of the feed roll 30 and the small diameter step 35 .
On the other hand, the engagement groove 33 is formed linearly over the entire axial length of the feed roll 30 so that the lower end portion of the leading pouch P1 is inserted and engaged.

Next, the lower nip roll 50 will be described.
The lower nip roll 50 is an elastic roll such as a rubber roll having the same diameter as the feed roll 30, and is provided at two places on the left and right sides of the feed roll 30. The lower nip roll 50 is coaxially attached to the roll shaft 32 of the feed roll 30 that transmits the driving force via the one-way clutch 51. The one-way clutch 51 is configured to allow rotation in a direction rotating at a higher speed than the roll shaft 32 and to prevent rotation in the opposite direction.
The feed roll 30 and the left and right lower nip rolls 50 are axially separated by a predetermined distance, and the leading end portions of the pair of lower guides 12 on both sides of the central lower guide 12 are opposed to this separated space. In this space, the pouch stopper 13 at the front end of the lower guide 12 is disposed so as not to interfere.

Next, the upper nip roll 40 will be described.
The upper nip roll 40 is also an elastic roll such as a rubber roll, and is disposed such that its roll axis 42 is positioned directly above the roll axis 32 of the feed roll 30. The upper nip rolls 40 are also provided as a pair on the left and right, and allow rotation of the roll shaft 42 to which the driving force is transmitted in a direction rotating at a higher speed than the roll shaft 42 and restrict one-way clutch 41 It is attached via.
The left and right upper nip rolls 40 are in partial contact with each other so as to straddle the feed roll 30 and the left and right lower nip rolls 50, respectively. The contact area with the feed roll 30 is in pressure contact with the area of the engagement protrusions 31 on both the left and right sides, and with respect to the lower nip roll 50, an area around half of the center.

  A pair of transport rolls 60 is disposed downstream of the separating and feeding mechanism 20. The peripheral speed V2 of the transport roll 60 is faster than the peripheral speed V1 (transport speed) of the feed roll 30, and accelerates and transports the pouch sent from the separating and feeding mechanism 20.

Next, the attachment mechanism of the stacker 10 will be described with reference to FIG.
As the attachment mechanism, there are provided a forward feeding mechanism 70 for sequentially feeding the pouch bundle to the downstream side, a pouch return regulation mechanism 80, and a posture assist mechanism 90 for setting the leading pouch P1 in a predetermined posture.
First, the forward feed mechanism 70 will be described. The forward feed mechanism 70 is disposed below the lower guide 12, and its tip end portion is advanced above the upper surface 12 a of the lower guide 12 from below the lower guide 12 and loaded onto the lower guide 12. The first to third feed pins 71, 72, 73 are provided as feed members that rotate in the direction of sequentially moving the pouches P to the downstream side.
The first to third feed pins 71, 72, 73 are elastically deformable wires radially extending with respect to the respective rotation shafts 71a, 72a, 73a, and their base ends are bosses 71b on the rotation shafts 71a, 72a, 73a. , 72b, 73b, and extends in a direction orthogonal to the rotation shafts 71a, 72a, 73a.

The rotation shafts 71a, 72a, 73a are rotatably supported by a pair of side walls (not shown) disposed outside the side guides 14 of the stacker 10, and are rotationally driven in the same rotation direction via the drive gear train 75. . By rotating the rotary shafts 71a, 72a, 73a (in the illustrated example, counterclockwise), the tip end portions of the first to third feed pins 71, 72, 73 become the upper surface 12a of the lower guide 12 from below the lower guide 12. , And abut on the pouch P to be sequentially moved downstream.
The first feed pin 71 on the upstream side is disposed at a position where the lower guide 12 has the largest inclination, and the second feed pin 72 and the third feed pin 73 are such that the slope of the lower guide 12 near the front end becomes near horizontal. The third feed pin 73 is disposed at the most downstream side. The amount of protrusion of the lower guide 12 from the upper surface 12 a is appropriately set so that the pouch P can be smoothly moved downstream sequentially by entering from the lower side of the lower guide 12. Further, one first feed pin 71 and one third feed pin 73 and two second feed pins 72 are symmetrically provided via the rotation shaft 72a.

Next, the return restriction mechanism 80 will be described.
The return restricting mechanism 80 is provided on the side guide 14 of the stacker 10, engages with the side edges of the stacked plurality of pouches P, and allows the pouches P to move downstream, to the upstream side. The rotary brush 81 is provided as a restricting member that prevents the movement of the lens. The rotating brushes 81 are provided at three locations in the same manner as the first to third feed pins 71, 72, 73 of the forward feeding mechanism 70.
The rotating brush 81 has a disk shape in which the brushes are radially formed, and a rotating shaft 83 is fixed at the center thereof. The rotation shaft 83 is disposed along the normal direction orthogonal to the tangential direction of the upper surface 12a of the lower guide 12, and is rotatable in one direction through the one-way clutch 84 to the bracket 85 fixed to the side guide 14. It is supported.
About half of the rotating brush 81 enters the space on the pouch storage side through the side opening 14 a of the side guide 14 and engages with the side edge of the pouch P.
The rotating brush 81 is allowed to move together with the downstream movement of the forward-fed pouch P, but reverse rotation is prevented, and the return of the pouch P to the upstream is restricted, and the reference plate 16 and the pouch The position of the leading pouch P1 in contact with the stopper 13 can be held.

As shown in FIG. 2A, the posture assist mechanism 90 pushes the pouch P near the front pouch P1 downstream in synchronization with the timing at which the maximum diameter portion 15a of the eccentric assist roller 15 pushes the front pouch P1. In this example, it is configured by the link mechanism.
That is, it comprises an action rod 91, a swing lever 92 whose free end is rotatably supported at the middle of the action rod 91, and a drive wheel 93 the other end of the action rod 91 is rotatably coupled. The connecting portion between the working rod 91 and the drive wheel 93 is at a position eccentric from the center of the drive wheel 93 by a predetermined distance.
When the driving wheel 93 rotates, the free end of the working rod 91 enters the pouch storage side from the side guide 14 and moves toward the downstream side from the front end of the pushing step f, and from the front end of the pushing step f to the outside of the side guide 14 It moves in a circulating manner with the return step b which moves to move to the upstream side, and the pouch P is pushed in in the pushing step f.

Next, the separation and conveyance of the automatic feeding device of the pouch of the present embodiment will be described with reference to FIG.
FIG. 4A shows the feed origin position.
At this origin position, the engagement projection 31 of the feed roll 30 is on the horizontal line H passing through the rotation center axis O of the feed roll 30, and the lower end of the leading pouch P1 in the vertically placed state regulated by the pouch stopper 13 is the engagement projection 31 is engaged. From this state, when the feed roll 30 is rotated, only the leading pouch P1 is lifted upward, and the lower end thereof is fitted into the adjacent engaging groove 33, and is raised with the rotation while being fitted. By this upward movement, as shown in FIG. 4B, the front pouch P1 is curved, and the reaction force acts in the direction of pushing the lower end portion into the engagement groove 33, and the upper portion is not removed from the engagement groove 33. The sheet is conveyed toward the nip portion N1 with the nip roll 40.
In the raising step, the upper end is pressed against the upper guide 17 by the amount by which the lower end of the leading pouch P1 is pushed up, and the leading pouch P1 is compressed from above and below. Due to this push-up force, the leading pouch P1 is buckled and deformed, and the buckling-deformed flexible portion protrudes outward from the relief opening 19 and the push-up force is relaxed.

Then, as shown in FIG. 4C, when the lower end portion of the leading pouch P1 reaches the nip portion N1, it is sandwiched by the nip portion N1 and the nip is completed. This position is the home position nip completion position. This position is located on the vertical line V passing through the rotation center axis O of the feed roll 30 in the illustrated example, but varies depending on the position of the nip portion N1. In the nip portion N1, the upper nip roll 40 having rubbery elasticity is recessed in the portion of the engagement protrusion 31, and the engagement protrusion 31 does not bite.
After the leading pouch P1 is gripped by the nip portion N1, the leading pouch P1 is conveyed downstream by being pinched by the feed roll 30 and the upper nip roll 40 with the lower end side as the tip. Therefore, the position to be fed downstream is determined by the phase of the engagement groove 33 of the feed roll 30 to a fixed position.

Next, the speed-up conveying mechanism in the process after the leading pouch P1 is fed out from the nip portion N1 will be described with reference to FIG.
As shown in FIG. 5A, the leading pouch P1 is conveyed at a conveyance speed according to the peripheral speed V1 of the feed roll 30 until it leaves the nip portion N1 and reaches the conveyance roll 60 on the downstream side. Ru. The lower nip roll 50 and the upper nip roll 40 also rotate at the same peripheral speed as the peripheral speed V1.
After the leading end of the leading pouch P1 reaches the nip portion N2 of the conveyance roll 60, as shown in FIG. 5B, the conveyance speed is switched to follow the peripheral speed V2 of the conveyance roll 60, and the leading pouch P1 is a feed roll It is transported at a speed higher than the circumferential velocity V1 of 30.
On the other hand, since the upper nip roll 40 and the lower nip roll 50 are respectively attached to the drive side roll shafts 32, 42 via the one-way clutches 41, 51, the upper nip roll 40 and the lower nip roll 50 are The idle rotation with respect to 32 and 42 does not prevent the speed-up transport by the transport roll 60.

On the other hand, the feed roll 30 rotates with the circumferential speed V1 and the difference between the speed of the feed roll 60 and the circumferential speed V2 of the transfer roll 60 accelerated is absorbed by the slip between the feed roll 30 and the pouch P. The feed roll 30 itself is made of metal or resin, has small sliding friction, and moves smoothly.
As described above, according to the present invention, the stack pressure applied to the leading pouch P1 can be significantly reduced by vertically arranging the leading pouch P1 of the stacked pouches on the stacker 10. Also, only by rotating the feed roll 30, the engagement protrusion 31 can be engaged with the lower end portion of the front pouch P1 and separated reliably, and the lower end portion of the front pouch P1 is engaged with the engagement groove 33 Since the sheet is fed to the nip portion N1 with the upper nip roll 40, the leading end position of the separated front pouch P1 can be held at a fixed position without dispersion.

[Modification of push-up force relaxation mechanism]
Next, with reference to FIG. 6, another configuration example of the push-up force reducing mechanism of the reference plate 16 will be described.
In the embodiment described above, the relief plate 19 is provided in the reference plate 16 to relieve the push-up force, but in this example, the relief plate 19 is not provided in the reference plate 16 and adjacent to the lower surface 17a of the upper guide 17. The top end of the leading pouch P1 is provided with a release groove 17b capable of entering a predetermined amount.
By providing the relief groove 17b in this manner, the upper end of the front pouch P1 enters the escape groove 17b when the front pouch P1 in the vertically placed state is lifted upward, and absorbs the lifting force and relaxes. it can.

In the above embodiment, the upper surface of the lower guide is curved corresponding to the pouch having the gusset at one end, but there is no difference in the thickness of the upper and lower ends, such as a flat pouch having no gusset The pouch may be configured to be linearly inclined or may be configured to extend horizontally.
In the above embodiment, although a plurality of rail-shaped lower guides are provided, they may be configured by a single plate-like member, and the shape thereof is not particularly limited. In the case of a plate-like member, an opening capable of moving in and out of the feed pin of the above-described sequential feeding mechanism may be appropriately provided.

DESCRIPTION OF SYMBOLS 1 Automatic feeder for pouches 10 Stacker 12 Lower guide, 12a Upper surface 13 Pouch stopper 14 Side guide, 14a Side opening 15 Eccentric assist roller, 15a Maximum diameter, 15b Minimum diameter 16 Reference plate, 17 Upper guide, 18 Outlet , 19 relief opening 20 separate feeding mechanism 30 feed roll, 31 engagement protrusion, 32 roll shaft, 33 engagement groove,
35 small diameter step portion 40 upper nip roll, 41 one way clutch, 42 roll shaft 50 lower nip roll, 51 one way clutch 60 transport roll 70 forward feed mechanism 71, 72, 73 first, second and third feed pins 71a, 72a, 73a rotation shaft 71b, 72b, 73b Boss 75 Drive gear train 80 Return regulation mechanism 81 Rotating brush, 83 Rotating shaft, 84 One-way clutch 85 Bracket 90 Posture assist mechanism 91 Working rod, 92 Swing lever, 93 Drive wheel 122 Strut, 124 Connecting bar O rotation center axis, H horizontal line, V vertical line PA pouch group, P pouch, P1 top pouch

Claims (7)

It has a lower guide for guiding the lower end of the stacked pouches, a side guide for guiding the left and right side edges of the pouch, and a reference plate for supporting the front of the leading pouch in the vertical position to be in a predetermined standing posture. A pouch stopper for determining the position of the lower end of the leading pouch at the front end of the lower guide, and a stacker provided with an outlet which exposes a lower region including the lower end of the leading pouch below the reference plate;
Wherein is disposed facing the outlet includes a feed roll having an outer peripheral surface of the side facing the outlet is rotated upward from below, the upper nip roll pressed against the top of the feed roll,
The feed roll is provided with a small diameter step at a position corresponding to the lower guide, and the pouch stopper enters the small diameter step in a free state, and the contact surface facing the leading pouch of the pouch stopper is the feed It has an arc shape that is flush with the outer peripheral surface of the roll,
An outer peripheral surface of the feed roll, the engaging projection projecting radially outward to engage from below the lower end of the top pouch positioned by said pouch stopper, the rotation direction downstream side with respect to the engaging projections An automatic feeding device for a pouch, comprising an engaging groove formed adjacent to the above.   The automatic feeding device of the pouch according to claim 1, wherein the upper surface of the lower guide is curved in an arc shape in which the inclination angle gradually increases from the front end toward the upstream side.   On the downstream side of the feed roll in the transport direction, a pair of transport rolls whose circumferential speed rotates at a higher speed than the feed roll is disposed, and the upper nip roll is closer to the roll axis relative to the roll axis to which the driving force is transmitted. The automatic feeding device for pouches according to claim 1 or 2, wherein the automatic feeding device for pouches according to claim 1 or 2 is mounted via a one-way clutch that allows rotation in a high speed rotation direction and prevents rotation in the opposite direction.   The feed roll is mounted on a roll shaft to which driving force is transmitted, and is in partial pressure contact with the upper nip roll, and is in partial pressure contact with the upper nip roll with the same diameter as the feed roll. 4. The lower nip roll according to claim 1, wherein said lower nip roll is coaxially mounted via a one-way clutch, said one-way clutch allowing rotation in a direction rotating at a higher speed than said roll shaft and preventing rotation in the opposite direction. The automatic feed device for pouches according to the above item.   The lower part of the lower guide of the stacker is pivoted about the rotation axis orthogonal to the arrangement direction of the pouch, and the leading end part enters the upper part of the lower guide from the lower side of the lower guide to the lower guide The automatic feeding device for pouches according to any one of claims 1 to 4, further comprising a forward feeding mechanism provided with a feeding member that rotates in a direction to sequentially move the loaded pouches downstream.   The side guide of the stacker is provided with a return restricting mechanism provided with a restricting member engaged with the side edge of the overlapped pouch to allow the movement of the pouch to the downstream side and blocking the movement to the upstream side. The automatic feeding device for pouches according to any one of claims 1 to 5.   An eccentric assist roller having a maximum diameter portion and a minimum diameter portion symmetrically with respect to the center of rotation is disposed on the reference plate, and the maximum diameter portion rotates in the direction of pushing downward while pushing the front surface of the leading pouch. An automatic feeder for a pouch according to any one of Items 1 to 6.

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