JP2005206367A - Bag unloader/loader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To takeout a retort pouch placed on a tray out of the tray by means of an unloader of a pin lift type without causing position deflection or fall of a bag due to unstable support to the bag at a tip of a pin. <P>SOLUTION: This bag unloader comprises a tray carrying device 7 to carry the tray 1 forward to be positioned, a bag takeout device 10 of a pin lift type installed under a tray carrying passage, and a bag receiving conveyor 11 installed ahead of it above the tray carrying passage. The bag takeout device comprises a group of pins 9 that can be moved up and down, so that a plurality of lines of bags Ws are taken out of the tray 1 upward by the group of pins. The bag receiving conveyor comprises a conveyor belt 12 disposed like comb teeth on the rear end side to reciprocate in a tray carrying direction. When it is moved rearward, the conveyor belt advances in between the pins, and when the group of pins move down, the lines of bags Ws are left on the conveyor belt. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an unloader for taking out a bag such as a retort pouch mounted thereon from a rectangular tray with a large number of holes regularly formed on the bottom surface, and a loader for loading the bag into the tray. .

  In Patent Document 1 below, a transport unit that transports a tray having a large number of holes regularly formed on the bottom surface by a predetermined distance, a plurality of rollers that are parallel to the transport direction, and can be moved up and down and transport the tray. A pin lift type transfer device comprising a group of pins capable of reciprocating in the same direction as the direction is described. When taking out the bag from the tray on which the bag is placed by using this transfer device, the pin group is positioned under the tray, the pin group is raised, and protrudes upward through the hole of the tray. At the tip, the bag is supported higher than the position of the roller, then the pin group and tray are moved below the roller, the pin group is lowered and the bag is left on the roller, and this bag is rotated. And then carry it out.

Japanese Patent Laid-Open No. 10-279064

In the above transfer device, the bag is placed on the tip of the pin group protruding upward from the hole of the tray, and in that state, the pin group is moved horizontally from the position of the tray to the position between the rollers. There is.
(1) If the size of the bag is small, the support of the bag by the pin group becomes unstable, and when the pin group is moved horizontally, the bag may be displaced or may fall from the tip of the pin. The higher the horizontal movement of the pin group, the easier it is for the bag to shift or drop due to inertia, particularly at the start and stop of forward movement. Further, in the case of a tray having no inner partition wall, the direction of the bag in the tray is disturbed during the conveyance of the tray, and the risk becomes more serious.
(2) When moving the pin group horizontally, if the number of pins increases, the inertia weight of the movement increases, and it becomes difficult to operate the transfer device at high speed.
(3) Since the pin group and the tray are moved horizontally together with the pin in the tray hole, the relative position shifts during the movement, and the pin rubs the edge of the hole in the tray. The burrs may damage the bag.

Moreover, in the said transfer apparatus, since the bag supported with the pin group is carried out by a roller, there exists the following problems.
(4) If the contents of the bag are liquid or contain a lot of liquid, the rigidity of the bag W is lost, so that the shape of the bag W conforms to the surface shape of the roller R as shown in FIG. Even if the roller R is rotated, slipping occurs, resulting in poor conveyance and disordered alignment. This becomes more prominent as the roller diameter is reduced. In particular, in the case of a retort pouch, a large amount of water tends to adhere to the surface of the bag W and slip easily. In order to reliably carry the roller conveyor, it is effective to increase the roller diameter and reduce the gap between the rollers, but this reduces the diameter of the pin P, and the number of pins supporting one bag. Therefore, the bag support by the pin group becomes more unstable.

(5) Since the conveyance direction of the roller is perpendicular to the conveyance direction of the bag by the pin group, the next bag cannot be conveyed onto the roller unless the bag is completely unloaded from the region where the pin group enters. In the transport device, one bag is transported onto a roller at a time, but in the case of a retort pouch, usually, a plurality of rows of bags are placed on the tray both vertically and horizontally. Therefore, one row (or a plurality of rows) of bags is sequentially conveyed onto the rollers at a time, and in this case as well, the previously conveyed bag row is completely unloaded from the region where the pin group on the roller enters. Until the next bag row cannot be transported onto the roller. Therefore, in any case, the conveyance speed cannot be increased.

(6) As described in (5) above, the next bag row cannot be transported onto the roller until the bag row transported last time is completely unloaded from the area where the pin group on the roller enters. In the rows, the spacing between the bags is constant, but the spacing between the rows is increased. It is difficult to eliminate this periodic gap and transport it at regular intervals. On the other hand, in the case of a retort pouch, the bags carried out from the tray are continuously sent to the draining device in a row and drained, and then sent to the boxing device and packed in a box. Therefore, in order to increase the number of treatments per unit time, it is necessary to increase the conveyance speed. As a result, it is necessary to set the total length of the draining device to be long and to install a boxing device having a high processing capacity.

In addition, the said transfer apparatus can be utilized also when charging a bag to a tray, and also in this case, there are the same problems as pointed out in the above (1) to (5).
The present invention has been made in view of the problems of such a conventional pin lift type transfer device, and prevents the bag from being displaced or dropped due to unstable support of the bag at the pin tip. At the same time, the main purpose is to prevent the pins from rubbing against the holes in the tray and creating burrs at the edges of the holes, thereby scratching the bag. Another object of the present invention is to suppress poor bag conveyance by the conveyor and disorder in the alignment state.

  An unloader for a bag according to the present invention includes a tray transport device that transports a rectangular tray with a plurality of holes regularly formed on a bottom surface to forward and positions the tray at a predetermined position, and a lower portion of the tray transport path. It has a group of pins that can be moved up and down and arranged in a plurality of rows in parallel along the tray transport direction and at predetermined intervals, and is perpendicular to the tray transport direction by the pin group. A bag take-out device for picking up one or more rows of bags from the tray upward, and installed above the tray transport path on the front side of the bag take-out device, and in parallel along the tray transport direction. And a plurality of conveyor belts arranged at predetermined intervals from each other, including a bag receiving conveyor for receiving bags from the pin group and transporting the bags forward, and the pin group can place a bag on the tip thereof. In the lowered position, the leading end is located below the tray, and in the raised position, it penetrates the hole in the tray and protrudes above the tray. The conveyor belt can reciprocate along the tray conveying direction. And when it moves rearward, it enters between the rows of pins. In the present invention, the upstream side in the tray conveyance direction is the rear side, and the downstream side is the front side.

  Another unloader according to the present invention includes a bag delivery device that receives a bag from the pin group and delivers it to the conveyor belt between the bag take-out device and the bag receiving conveyor instead of the reciprocating movement of the conveyor belt. . This bag delivery device has a plurality of mounting members that are installed above the tray transport path and are arranged in parallel along the transport direction of the tray and at a predetermined interval from each other. Is capable of reciprocating and elevating along the tray conveying direction, and a bag can be placed on the upper surface thereof. When moved rearward, it entered between the rows of the pin groups and moved forward. Sometimes it enters between the conveyor belts.

  A loader according to the present invention includes a tray transport device that transports a rectangular tray in plan view, in which a large number of holes are regularly formed on the bottom surface, and positions the tray in a predetermined position, and a predetermined position below the tray transport path. And a group of pins that can be moved up and down in parallel along the transport direction of the tray and arranged in a plurality of rows at predetermined intervals, and is perpendicular to the transport direction of the tray by the pin group. A bag loading device for loading a row or a plurality of rows of bags into the tray from above, and a rear side of the bag loading device, disposed above the tray conveyance path, along the tray conveyance direction. It has a plurality of conveyor belts arranged in parallel and spaced apart from each other, and includes a bag supply conveyor that conveys the bags forward and supplies them to the pin group, and the pin group carries a bag at its tip. Can be placed, descending position The front end of the conveyor belt is located below the tray, protrudes upward from the tray through the hole in the tray at the raised position, and the conveyor belt is capable of reciprocating along the transport direction of the tray. It moves to the position between the rows of the pin group when moved to.

  In another loader according to the present invention, a conveyor belt does not reciprocate. Instead, a bag delivery device that receives a bag from the conveyor belt and delivers it to the pin group between the bag charging device and a bag supply conveyor is provided. Prepare. This bag delivery device has a plurality of mounting members that are installed above the tray transport path and are arranged in parallel along the transport direction of the tray and at a predetermined interval from each other. Is capable of reciprocating along the transport direction of the tray and can be moved up and down, and a bag can be placed on the upper surface thereof. When moved forward, it enters a position between the rows of the pins, and the rear side When it moves to, it will enter between the said conveyor belts.

In the unloader or loader, in order to more stably support the bag on the upper surface of the placement member (bag support surface), a suction hole for sucking the bag is formed on the upper surface of the placement member, and the suction hole A vacuum source can be connected. Further, in order to more stably support the bag on the tip of the pin (bag support surface), a suction hole for sucking the bag can be formed at the tip of the pin, and a vacuum source can be connected to the suction hole. .
Furthermore, in the unloader or loader, in order to more stably support the bag at the tip of the pin, a bag pressing member can be arranged on the pin group so as to be movable up and down. In the unloader, the bag holding member is raised as the pin group is raised, and in the loader, the bag holding member is lowered as the pin group is lowered.

In the unloader and loader, the hole formed in the tray includes a slit-like hole that is long along the tray transport direction, and the pin includes a plate-like pin that penetrates the slit-like hole. The slit-like hole and the plate-like pin are also described in Patent Document 1.
Also, in the unloader or loader, a tray supply for supplying the tray (a real tray on which a bag is placed in the case of an unloader or an empty tray in the case of a loader) to a predetermined position of the tray transporter in the upstream side of the tray transporter. An apparatus can be installed, and a tray take-out apparatus for taking out the tray (an empty tray in the case of an unloader and an actual tray in the case of a loader) can be installed on the downstream side of the tray conveying apparatus.

  According to the unloader and the loader according to the present invention, in the bag take-out device or the bag loading device, the pin group does not move in the horizontal direction only by raising and lowering, and therefore, the bag support compared to the case where these move horizontally (conventional example). It is possible to prevent the bag from being displaced or falling from the tip of the pin. In addition, since it is not necessary to move the pin group horizontally, it is easy to increase the number of pins to make the support more stable. In addition, since the pins only move up and down at a fixed position, a relative positional deviation occurs with the tray during horizontal movement as in the past, and the pins rub against the edges of the holes in the tray to form burrs. The burr prevents the bag from being damaged.

According to the unloader and loader according to the present invention, each of the bag receiving conveyor and the bag supply conveyor has a plurality of conveyor belts arranged in parallel at a predetermined interval, or the bag delivery device has a predetermined interval. Since there are a plurality of mounting members arranged in parallel and these are moved to receive the bag from the pin group that moves up and down at a fixed position or to supply the bag to the pin group, the bag moves in the front-rear direction. Is performed stably. This is a state in which the bag is in surface contact with the conveyor belt or the mounting member during movement, and the contact area is much larger than conventional (contact during movement is point contact with the pin tip or line contact with the roller). This is because it can be greatly increased. As a result, the entire apparatus can be moved at high speed.
The support of the bag is further stabilized by forming a suction hole at the tip of the pin or the upper surface of the mounting member and reducing the pressure to suck the bag, or by providing a bag pressing member on the pin group. If the support of the bag is stable, the number of pins and the number of mounting members can be reduced. Moreover, the speed at the time of movement of a mounting member is also attained.

  According to the unloader and loader according to the present invention, the transport direction of the tray and the bag is the same direction, so that the speed of the transport cycle can be improved. That is, when the bag on the belt conveyor is still in the region where the bag enters between the pin groups, the belt conveyor can be started to enter between the pin groups, or the placing member can be moved to the belt conveyor. The entry can be started during this period, and the speed of the transfer cycle can be increased accordingly. And it is also possible to carry out the bag at equal intervals by adjusting the moving speed and conveying speed of the belt conveyor, the timing of raising and lowering the pin group, and the like.

The bag unloader and loader according to the present invention will be described below with reference to FIGS.
First, the tray 1 to be used is a rectangular tray comprising a front wall 2, a rear wall 3, a side wall 4 (one side wall not shown) and a bottom wall 5 as shown in FIG. A total of 36 bags (retort pouches) 6 are arranged in a row, 6 in the longitudinal and lateral directions (there are 6 rows of bags arranged in the front-rear direction, and 6 rows of bags Ws arranged in the vertical direction). ). A large number of holes 6 are formed in a grid pattern in the entire bottom wall 5. In addition, when distinguishing a real tray and an empty tray especially, it is set as the real tray 1a and the empty tray 1b.
The unloader shown in FIGS. 1 to 9 transports the tray 1 forward (leftward in FIG. 1) by one pitch (almost half the length of the tray 1) and positions the tray 1 at a predetermined position (conveyance). And a plurality of rows (in this example, 29 rows) arranged in parallel along the transport direction (front-rear direction) of the tray 1 and at a predetermined interval from each other. A bag take-out device 10 having a group of pins 9 that can be moved up and down arranged in each row (18 in each row), and a bag receiving conveyor 11 (rear side) installed on the front side of the bag take-out device 10 and above the transport path of the tray 1 Only the end-side conveyor belt 12 is shown).

In the bag take-out device 10, each pin 9 a constituting the pin group 9 is arranged corresponding to the position of the hole 6 of the tray 1 positioned at a predetermined position, and has a smaller diameter than the hole 6. Can mount the bag W. The pin group 9 can be moved up and down, and its tip (tip of the pin 9a) is located below the tray 1 at the lowered position, and protrudes above the tray 1 through the hole 6 of the tray 1 at the raised position. Of the six bag rows Ws placed in the tray 1 (bag rows arranged in a direction perpendicular to the tray conveying direction), the bag rows are within the range of one pitch (three rows in this example). Can be taken out at a time above the tray 1.
The bag receiving conveyor 11 has a number of conveyor belts 12 arranged in parallel along the conveying direction of the tray 1 and at predetermined intervals from each other on the rear end side. Therefore, as shown in FIG. 9, the rear end portion of the bag receiving conveyor 11 is comb-shaped, and the interval between the adjacent conveyor belts 12 is wider than the diameter of the pins 9a, and the width of the conveyor belt 12 is a group of pins. It is set to be smaller than the interval between 9 adjacent columns. The bag receiving conveyor 11 (and the conveyor belt 12 at the same time) can reciprocate in the horizontal plane along the transport direction of the tray 1, and when the bag receiving conveyor 11 moves rearward, the conveyor belt 12 moves to the pin group 9. Enter between the rows. At this time, the upper end position of the conveyor belt 12 (the position of the transport surface 12a) is located below the position of the tip of the pin group 9 in the raised position. The approach length is approximately one pitch of the transport distance of the tray 1 and substantially corresponds to the length in the front-rear direction of the rows constituting the pin group 9 (the length of the pin group 9 as viewed in the transport direction of the tray 1). The bag receiving conveyor 11 is not reciprocally movable as a whole, and only the rear end portion may be reciprocally movable, for example, as a slide conveyor described in JP-A-9-272626. Moreover, even if it is not comprised from the belt conveyor 12 arrange | positioned at the comb-tooth shape as a whole, the rear-end part should just be formed in the comb-tooth shape by the belt conveyor 12. FIG.

With reference to FIGS. 1-8, the action | operation and effect | action of this unloader are demonstrated in order of a process.
(1) As shown in FIG. 1, the actual tray 1a is sent forward by the tray transfer device 7, stopped at a predetermined position, and positioned. At this time, the pin group 9 is lowered, and its tip is located below the bottom wall 5 of the actual tray 1a. Therefore, the pin group 9 and the actual tray 1a do not interfere with each other. Further, each hole 6 of the positioned actual tray 1 a is located immediately above each pin 9 a of the pin group 9. At this time, the bag row Ws taken out from the previous empty tray 1b exists on the conveyor belt 12.
(2) As shown in FIG. 2, the pin group 9 rises, passes through the hole 6 of the actual tray 1a, protrudes above the tray 1, and the bag row Ws within the range of one pitch in the tray 1 Remove upward. The tip position of the protruding pin group 9 (the lower end position of the bag W taken out) is higher than the upper end position of the conveyor belt 12 (the position of the conveying surface 12a) with a margin.

(3) As shown in FIG. 3, the conveyor belt 12 horizontally moves rearward and enters between the rows of the pin groups 9, and the bag rows for one pitch lifted above the tray 1 by the pin groups 9. Stop at a position below Ws. As shown in this example, the bag row Ws received by the belt conveyor 12 last time is transported outside the area (indicated by “d” in FIG. 3) entering between the pin groups 9, that is, the front side of the area. The belt conveyor 12 can be started to enter between the pin groups 9, but can also be started when the previous bag row Ws still exists in the region. In that case, the speed of the conveyance cycle can be increased, but it is necessary to set the timing so that the bag row Ws on the belt conveyor 12 does not interfere with the pin group 9.
(4) As shown in FIG. 4, the pin group 9 is lowered, and the bag row Ws supported at the tip of the pin group 9 is left on the conveyor belt 12.
(5) As shown in FIG. 5, the actual tray 1a is sent forward by one pitch by the tray transport device 7 and stopped at a predetermined position, while the conveyor belt 12 moves forward and stops. In this example, since the bag row Ws is transferred from the pin group 9 to the conveyor belt 12 (see FIG. 4), the conveyor belt 12 is moved forward until the conveyor belt 12 moves forward. Although the rotation is stopped, the rotation may be continued in the meantime, or the rotation may be started at the same time as the transfer is performed, for example.
(6) As shown in FIGS. 6-8, the same process is repeated with respect to the bag row Ws within the range of the next one pitch.

  Although a detailed description is omitted, the unloader shown in FIGS. 1 to 9 can function as a loader by operating in reverse.

10 to 16 show another unloader. 1 to 9, the unloader shown in FIGS. 1 to 9 is installed above the conveying path of the tray 1 and receives the bag W from the pin group 9 in that the bag receiving conveyor 11 (and the conveyor belt 12) does not reciprocate. Although it differs in that it includes a bag delivery device 13 that is delivered to the conveyor belt 12 and a bag pressing member 14 that is disposed on the pin group 9 so as to be movable up and down, there is no change in other respects.
The bag delivery device 13 has a large number of placement members 15 arranged in parallel along the transport direction of the tray 1 and at predetermined intervals. The mounting member 15 can be moved back and forth along the conveying direction of the tray 1 and can be moved up and down, and the bag row Ws for one pitch lifted by the pin group 9 can be mounted on the upper surface thereof, as shown in FIG. When moving to the rear side, it enters between the rows of the pin groups 9 and when it moves to the front side, it enters between the rows of the conveyor belts 12. The width of each mounting member 15 is set to be smaller than the interval between adjacent conveyor belts 12 and smaller than the interval between adjacent rows of the pin group 9, and the length in the front-rear direction is approximately one pitch of the transport distance of the tray 1. And substantially corresponds to the length in the front-rear direction of the rows constituting the pin group 9 (the length of the pin group 9 in the transport direction of the tray 1).

Link connecting portions 16 are fixed to the front ends of the mounting member 15, and the rear ends of the links 17 and 18 are pin-connected to the link connecting portions 16, respectively, and the front ends of the links 17 and 18 are on a common connecting plate 19. The pin is connected to the link connecting portion 21 fixed to the base, and a parallel link mechanism is formed here. Of the parallel link mechanism, the link connecting portions 16 and 21 and the links 17 and 18 are located between the rows of the conveyor belts 12.
The connecting plate 19 is located below the conveyor belt 12 and is supported by a supporting means (not shown) so as to be able to reciprocate along the transport direction of the tray 1 and is reciprocated in a horizontal plane by a driving source (not shown). The placement member 15 reciprocates along the transport direction of the tray 1. Further, the front ends of all the links 18 are fixed to a common pin 22 (extending in the axial direction), and the pins 22 can be rotated by a drive source (not shown), thereby operating the parallel link mechanism. The mounting member 15 moves up and down.
The upper surface of the mounting member 15 is flat, and a number of suction holes 23 for bag suction are formed along the length direction. Each suction hole 23 is connected to a vacuum source (blower) 25 through a common vacuum pipe 24. Always connected.
The bag pressing member 14 has an elastic member 26 attached to the entire surface thereof, and can hold the bag row Ws of one pitch lifted by the pin group 9 with its lower surface.

With reference to FIGS. 10 to 15, the operation and action of the unloader will be described in the order of steps.
(1) As shown in FIG. 10, the actual tray 1a is fed forward by the tray transport device 7, stopped at a predetermined position, and positioned. Subsequently, the bag pressing member 14 descends and presses the bag row Ws within the range corresponding to one pitch in the tray 1 from above. On the other hand, the mounting member 15 is in the raised position on the front side and is positioned between the conveyor belts 12. On top of that, there is a bag row Ws taken out from the previous empty tray 1b, and each bag W is sucked through the suction holes 23, so that it is stably supported on the mounting member 15.

(2) As shown in FIG. 11, the pin group 9 rises, passes through the hole 6 of the actual tray 1a, protrudes above the tray 1, and the bag row Ws within the range of one pitch in the tray 1 Remove upward. As the pin group 9 rises, the bag pressing member 14 rises, and the bag row Ws is stably lifted while being pinched by the bag pressing member 14. On the other hand, the placing member 15 descends between the conveyor belts 12 and leaves the bag row Ws on the conveyor belt 12. Since the suction force by the suction hole 23 is not set so large (it is not necessary), the bag W is easily separated from the placement member 15 at this time. When the mounting member 15 is in the lowered position, its upper surface has more margin than the upper end position of the conveyor belt 12 (position of the conveying surface 12a) and the tip position of the protruding pin group 9 (lower end position of the taken out bag W). Low.
In this example, when the bag row Ws is transferred from the placing member 15 to the conveyor belt 12, the rotation of the conveyor belt 12 is stopped, but the rotation may be continued during that time.

(3) As shown in FIG. 12, the placement member 15 horizontally moves rearward, enters between the rows of the pin groups 9, and is lifted above the tray 1 by the pin groups 9. Stops at a position below the row Ws.
(4) As shown in FIG. 13, the mounting member 15 is raised, the bag pressing member 14 is raised at the same time, the pin group 9 is lowered, and the bag row Ws supported at the tip of the pin group 9 is It is left behind on the mounting member 15. At this time, the bag W is sucked through the suction holes 23 and is stably supported on the mounting member 15.
(5) As shown in FIG. 14, the placing member 15 moves forward while remaining in the raised position and enters between the conveyor belts 12. Since the bag W is sucked through the suction hole 23, the bag W is stably supported on the mounting member 15 during this movement. On the other hand, the actual tray 1a is sent forward by the tray conveying device 7, stopped and positioned at a predetermined position, and then the bag pressing member 14 is lowered, and the bag row within the range corresponding to the remaining one pitch in the tray 1 is reached. Hold Ws from above.
(6) Thereafter, the same steps are repeated as shown in FIG.

Although detailed description is omitted, the unloader shown in FIGS. 10 to 16 can function as a loader by operating in reverse.
In the above example, the suction hole is not provided at the tip of the pin 9, but if the suction hole is provided at the tip of the pin 9 and connected to a vacuum source, the lifting and lowering of the bag W by the pin group 9 is more stable. You can do it. This effect obtained by providing a suction hole at the tip of the pin and connecting it to a vacuum source is also achieved in the apparatus of Patent Document 1.
In the above example, the bag pressing member 14 is only moved up and down on the pin group 9. However, the bag holding member 14 can be reciprocated along the tray conveying direction to move the conveyor belt 12 forward. It can also be moved forward following the example of FIGS. 1 to 9 or following the movement of the mounting member 15 forward (example of FIGS. 10 to 16).

It is a side view which shows one of the operation | movement stages of the unloader which concerns on this invention. It is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. FIG. 2 is a plan view corresponding to FIG. 1. It is a side view which shows one of the operation | movement stages of the other unloader which concerns on this invention. It is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. Furthermore, it is a side view which shows the continuation. It is a top view corresponding to FIG. It is a side view explaining the problem of the conventional pin lift type unloader or loader.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tray 6 Tray hole 7 Tray conveyance apparatus 9 Pin group 10 Bag taking-out apparatus 11 Bag receiving conveyor 12 Conveyor belt 13 Bag delivery apparatus 14 Bag holding member 15 Mounting member 23 Adsorption hole
W bag Ws bag row (row perpendicular to the tray transport direction)

Claims (8)

A tray transport device that transports forward a rectangular tray with a large number of holes regularly formed on the bottom and positions the tray in a predetermined position, and is installed at a predetermined position below the transport path of the tray. A group of pins that can be moved up and down arranged in parallel in a direction and at a predetermined interval in a plurality of rows, and the rows of pins that are perpendicular to the transport direction of the tray by the pin groups. A bag take-out device for taking out from the inside of the tray, and a front side of the bag take-out device, which is installed above the transport route of the tray, and is arranged in parallel along the tray transport direction and at a predetermined interval from each other. A plurality of conveyor belts, and a bag receiving conveyor for receiving bags from the pin group and transporting them forward, the pin group being capable of placing a bag at the tip thereof, and at the lowered position Is located below the tray, passes through the hole in the tray in the raised position, protrudes above the tray, and the conveyor belt can be reciprocated along the tray conveying direction and moved to the rear side. Sometimes the bag unloader is inserted between the rows of pins. A tray transport device that transports forward a rectangular tray with a large number of holes regularly formed on the bottom and positions the tray in a predetermined position, and is installed at a predetermined position below the transport path of the tray. A group of pins that can be moved up and down arranged in parallel in a direction and at a predetermined interval in a plurality of rows, and the rows of pins that are perpendicular to the transport direction of the tray by the pin groups. A bag take-out device for taking out from the inside of the tray, and a front side of the bag take-out device, installed at a predetermined position above the transport path of the tray, in parallel along the tray transport direction and spaced apart from each other by a predetermined distance; A bag receiving conveyor having a plurality of conveyor belts arranged above and above the tray transport path, arranged in parallel along the tray transport direction and spaced apart from each other by a predetermined distance. A plurality of placement members disposed; and a bag delivery device for receiving a bag from the pin group and delivering the bag to the conveyor belt, wherein the pin group is capable of placing the bag at a tip thereof, and the tip at a lowered position Is located below the tray, protrudes upward from the tray through the hole in the tray in the raised position, and the mounting member can be reciprocated and raised and lowered along the transport direction of the tray. An unloader for a bag, wherein the bag can be placed on the bag and enters between the rows of the pin groups when moved to the rear side and enters between the conveyor belts when moved to the front side. A tray transport device that transports forward a rectangular tray with a large number of holes regularly formed on the bottom and positions the tray in a predetermined position, and is installed at a predetermined position below the transport path of the tray. A group of pins that can be moved up and down arranged in parallel in the direction and spaced apart from each other in a plurality of rows, and one or more rows of bags perpendicular to the tray conveying direction are moved upward by the pin groups. And a bag charging device that is loaded into the tray, and is disposed above the tray conveyance path on the rear side of the bag loading device, in parallel along the tray conveyance direction and at a predetermined interval from each other. A plurality of conveyor belts arranged and arranged, comprising a bag supply conveyor that forwards bags and supplies them to the pin group, wherein the pin group can place a bag at its tip, and in a lowered position Its tip is said Located below the lay, passes through the hole in the tray at the raised position, protrudes above the tray, and the conveyor belt can be reciprocated along the transport direction of the tray. A bag loader characterized by entering a position between rows of pins. A tray transport device that transports forward a rectangular tray with a large number of holes regularly formed on the bottom and positions the tray in a predetermined position, and is installed at a predetermined position below the transport path of the tray. A group of pins that can be moved up and down arranged in parallel in the direction and spaced apart from each other in a plurality of rows, and one or more rows of bags perpendicular to the tray conveying direction are moved upward by the pin groups. And a bag loading device to be loaded into the tray, and at a predetermined position above the tray conveyance path on the rear side of the bag loading device, in parallel along the tray conveyance direction and predetermined to each other. A bag supply conveyor having a plurality of conveyor belts arranged at intervals, and installed above the tray conveyance path, arranged in parallel along the tray conveyance direction and at a predetermined interval from each other Provided with a bag delivery device that receives a bag from the conveyor belt and delivers it to the pin group, and the pin group is capable of placing the bag at a tip thereof, and the tip is at a lowered position. Located below the tray, passes through the hole in the tray in the raised position, protrudes above the tray, and the placing member can be reciprocated and raised and lowered along the transport direction of the tray. A bag loader which is capable of placing a bag and enters a position between rows of the pin group when moved to the front side and enters between the conveyor belts when moved to the rear side. The bag unloader according to claim 2, wherein a suction hole for sucking a bag is formed on an upper surface of the mounting member, and a vacuum source is connected to the suction hole. The bag loader according to claim 4, wherein a suction hole for sucking a bag is formed on the upper surface of the mounting member, and a vacuum source is connected to the suction hole. The bag unloader according to claim 1 or 2, further comprising a bag pressing member that is disposed on the pin group so as to be movable up and down, and that rises as the pin group rises. 5. The bag loader according to claim 3, further comprising a bag pressing member that is disposed on the pin group so as to be movable up and down and descends as the pin group descends.

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