JP5875104B2 - Packing object filling method and apparatus - Google Patents

Description

  The present invention relates to a package in which the side edges are held in a suspended manner by a pair of left and right grippers, and the package is filled at a predetermined intermittent stop position with respect to a bag that is intermittently transferred along a predetermined track. The present invention relates to an object filling method and apparatus. More specifically, the present invention relates to a packing material filling method and apparatus for filling using an auger type filling apparatus.

  When filling a bag with powder or the like to be packaged using an auger type filling device, various problems have arisen due to a filling drop between the discharge port of the auger type filling device and the bag bottom. Specifically, when the packaged item is powder, the powder rises due to the drop pressure, and thus the sealing operation cannot be performed until the floating state is settled. Further, when the packaged item is a viscous material, rebounding may occur, and when the packaged item is a solid material such as boiled, an impact is generated when landing on the bag bottom.

  To solve such a problem, the bag is first raised and the discharge port of the auger type filling device is arranged in the bag near the bottom of the bag, and filling is started from this state to match the filling amount of the package. The structure which suppresses the filling drop by gradually lowering is already known (see Patent Document 1 below).

  On the other hand, for the purpose of improving the filling accuracy by the auger type filling device, the bag sandwiched by the gripper is re-gripped with the chuck connected to the measuring device, and the packed material is filled while measuring the filling amount with the measuring device. The structure which performs is also well-known (refer the following patent document 2).

  Therefore, by combining the above two configurations, that is, the chuck connected to the measuring instrument can be moved up and down together with the measuring instrument, and the bag is lowered in accordance with the filling of the package, the problem caused by the filling drop is solved. However, it can be easily imagined that the filling accuracy can be improved.

  However, the use of such a configuration causes the following problems. That is, the bag opening of the bag is opened in the filling process of the packaged items, and as shown in FIG. 1, a pair of left and right grippers 84 holding the bag 86 are brought close to each other (hereinafter referred to as an approach position). (FIG. 1 shows the gripper 84 in the approach position and the bag 86 held between the grippers 84). For example, when the bag 86 is a flat bag, the width (W1) in the vicinity of the bag mouth is the narrowest because the gripper 84 is in the approaching position, and the width gradually increases downward from there. Is equal to the original bag width W of the flat bag at the bottom and is the maximum. As is apparent from the figure, the lateral width of the portion of the bag 86 located below the gripper 84 is wider than the distance between the pair of left and right grippers 84 at the approach position.

  If the bag 86 is grasped by the chuck connected to the measuring instrument and is lifted in the vertical direction from this state, a portion below the gripper 84 of the bag 86 is caught by the gripper 84 and a pinhole or the like is generated. Further, when the bag 86 is lowered while filling, the bag 86 interferes with the gripper 84, so that a pinhole or the like is generated, and it is difficult to grip the gripper 84 back to the gripper 84.

  The above problem will occur if the above two configurations are simply combined. Therefore, in order to solve such a problem, for example, it is conceivable that the chuck connected to the measuring instrument can be moved in the front-rear direction. If such a configuration is adopted, interference between the bag and the gripper at the time of raising and lowering can be avoided by retreating the bag from the radial direction of the rotary table and then raising and lowering after holding the bag with the chuck. It becomes possible. However, in this case, since a time for moving the chuck in the front-rear direction is required, a reduction in productivity is inevitable. In addition, the bag mouth may be closed due to air resistance when the chuck is retracted radially outward, or the bag may be shaken when the chuck moves forward, causing a problem in the gripping and returning process to the gripper.

  Further, a configuration is known in which a gripper is detachably provided on the rotary table so that the gripper itself is held when the gripper is replaced, and the filling amount of the package is measured while raising and lowering the bag together with the gripper. (See Patent Document 3 below). Although this configuration makes it possible to avoid interference between the bag and the gripper during lifting, all the multiple sets of grippers provided around the rotary table must be detachable from the rotary table, and the structure is complicated. Increase in cost and cost is inevitable.

JP 52-29393 A Japanese Patent Publication No. 6-29043 Japanese Patent No. 3559483

  The present invention has been made in view of the above-described problems of the prior art, and has a simple structure, but does not cause problems such as a decrease in productivity and the occurrence of pinholes, and the discharge port and bag of the auger type filling device. It is an object of the present invention to provide a packaged filling method and apparatus that can solve problems caused by a filling drop between the bottom and the packaged object and can improve the filling accuracy.

In order to solve the above-mentioned problem, a plurality of pairs of left and right grippers for holding the bag in a suspended state with both side edges open upward and intermittently transferring the bag along a predetermined trajectory in a horizontal plane are provided. In the method of filling an object to be packaged in an intermittent transfer type vertical bag filling and packaging machine that sequentially performs a predetermined packaging process in the transfer process, both side edges of the bag that has been transferred to a predetermined intermittent stop position by the gripper and stopped The gripper is held by a pair of left and right chucks arranged at the predetermined intermittent stop position at a position above the gripper, and the gripper is opened and the bag is gripped from the gripper to the chuck. A gripping step for separating the pair of grippers until the distance between them becomes wider than the maximum width portion of the bag, and raising the chuck by a predetermined distance, A bag raising step of inserting a discharge port of an auger type filling device arranged at a fixed intermittent stop position into the bag and positioning a tip of the discharge port at a position spaced apart from a bottom of the bag; While discharging the package from the outlet, the chuck is gradually lowered by the predetermined distance, and the weight of the package in the bag is measured, and when the measured value reaches the target filling amount, the auger is measured. A filling step for ending filling by the type filling device, and the pair of left and right grippers are brought close to each other to sandwich the side edges of the bag again, then the chuck is opened, and the bag is removed from the chuck to the gripper. And a grabbing and returning step. The method of filling an article to be packaged is provided. According to the present invention, when the bag is raised and lowered, the pair of left and right grippers are separated from each other, so that interference between the bag and the gripper can be avoided and pinholes can be prevented from being generated. The return can also be performed reliably and stably. The pair of left and right grippers are generally provided so as to be able to contact and separate from each other in relation to opening and tensioning the bag mouth. Therefore, it is only necessary to perform the contact / separation operation at a station for filling an object to be packaged, the structure can be simplified, and the cost can be reduced.
In order to solve the above problem, a plurality of left and right grippers for intermittently transferring the bag along a predetermined trajectory in a horizontal plane while holding the side edges of the bag open upward and holding the bag in a suspended manner. In the method of filling an article to be packaged in an intermittent transfer type vertical bag filling and packaging machine in which a predetermined packaging process is sequentially performed in the transfer process, both side edges of the bag stopped by being transferred to a predetermined intermittent stop position by the gripper The gripper is gripped by the pair of left and right chucks disposed at the predetermined intermittent stop position at a position above the gripper, and the gripper is opened to grip the bag from the gripper to the chuck. The pair of left and right bag body forming members are moved closer to each other than the distance between the pair of left and right grippers to hold the body of the bag in a state of being pressed from both sides in the width direction. A step of simultaneously raising the chuck and the bag body forming member by a predetermined distance, and inserting the discharge port of the auger type filling device disposed at the predetermined intermittent stop position into the bag, A bag raising step for positioning the tip at a position spaced from the bottom of the bag by a predetermined distance, and gradually discharging the chuck and the bag body forming member by the predetermined distance while discharging the object to be packaged from the discharge port. And lowering the weight of the object to be packaged in the bag. When the measured value reaches a target filling amount, the filling by the auger type filling device is terminated, and the bag body forming member is separated from the bag. A filling step for releasing the narrow pressure on the body portion, and after holding the both side edges of the bag after filling with the pair of left and right grippers again, opening the chuck, and From the chuck It provides the packed material filling method, characterized in that it comprises a step back gripping back gripping the path. According to the present invention, the bag body part forming member is moved closer to the gap between the pair of left and right grippers to hold the bag body part with a narrow pressure, so that interference between the bag and the gripper can be avoided, pinholes are generated, etc. Of course, the gripping can be reliably and stably performed without lowering the productivity. Moreover, in this invention, since it is only necessary to provide a pair of bag trunk | drum shaping | molding member in a re-holding measuring device so that contact / separation is possible, simplification of a structure and reduction of cost can be achieved compared with a prior art.
In the packaging material filling method, at least in the filling step, a bag width at the bottom of the bag is formed by the bag bottom portion molding member from a predetermined timing to completion of filling with respect to the start of filling of the packaging material. The vicinity of the center of the direction may be recessed upward. Accordingly, the bottom portion of the bag is pushed up by the bag bottom portion molding member, and the vicinity of the center in the width direction of the bag is recessed upward, thereby assisting in holding the narrow pressure of the bag by the bag trunk portion molding member. Even if the narrow pressure is not set so high, the narrow pressure can be reliably held, and damage to the bag by the bag body forming member can be suppressed.
In order to solve the above problem, a plurality of left and right grippers for intermittently transferring the bag along a predetermined trajectory in a horizontal plane while holding the side edges of the bag open upward and holding the bag in a suspended manner. In a package filling apparatus in an intermittent transfer type vertical bag filling and packaging machine that sequentially performs a predetermined packaging process in the transfer process, an auger type filling apparatus disposed at a predetermined intermittent stop position, and freely movable up and down A provided measuring instrument, a chuck that is integrally connected to the measuring instrument and that holds both side edges of the bag at a position above the gripper, and is integrally connected to the measuring instrument and is connected to and separated from each other. A pair of left and right bag body forming members, and a gripping and weighing device disposed at the predetermined intermittent stop position, the pair of left and right bag body forming members of the gripping and weighing device, The body of the bag Provided is an article filling device characterized in that the bag is held in a state in which the bag is narrowed by approaching until the distance between the pair of left and right grippers becomes narrower in a state of being sandwiched from both sides in the width direction. .
In the packaged filling apparatus, the re-grabing weighing device further includes a bag bottom forming member that is integrally connected to the weighing device and narrower than the bottom of the bag, and the bag bottom forming member is The bag may be movable between a molding position where the substantially center of the bottom portion of the bag in the width direction is pressed upward and a retracted position where the bag does not interfere with the bag.

  According to the present invention, by simply adding a simple configuration, interference between the bag and the gripper can be avoided, and problems such as pinholes can be prevented. It can be performed reliably and stably.

1A and 1B show a gripper at an approach position of a conventional packaging machine and a bag sandwiched between the grippers. FIG. 1A is a front view and FIG. 1B is a plan view. FIG. 2 is a schematic configuration diagram of a packaging machine including a packaged material filling apparatus showing the first embodiment of the present invention. FIG. 3 is a perspective view of the article filling device 16 at the station IV, and shows a state immediately after the bag 6 has been transferred to the station IV. FIG. 4 is a perspective view of the to-be-packaged filling device 16 in the station IV, and shows a state in which the grip 6 is replaced by the chuck 38 and the pair of grippers 4 are moved to the separation positions. FIG. 5 is a perspective view of the to-be-packaged filling device 16 at the station IV, and shows a state in which the chuck 38 is raised to the raised end position. FIG. 6 is a perspective view of the article filling apparatus 16 at the station IV, and shows a state in which the pair of chucks 38 are being lowered. FIG. 7 is a perspective view of the article filling device 16 at the station IV, and shows a state where the chuck 38 is lowered to the lower end position. FIG. 8 shows the bag 6 when the chuck 38 is lowered, where (a) is a front view and (b) is a plan view. FIG. 9 is a perspective view of the packaging material filling apparatus 16 at the station IV, showing a state where the bag 6 is gripped back, the gripper 4 holds the bag 6 in the approach position, and the chuck 38 is opened. . FIG. 10 is a perspective view at the station IV of the to-be-packaged filling device 116 showing the second embodiment of the present invention, and shows a state immediately after the bag 6 has been transferred to the station IV. FIG. 11 is a perspective view of the to-be-packaged filling device 116 at the station IV, and shows a state in which the chuck 38 is moved to the lowered end position and the bag body forming member 160 is in the approach position. FIG. 12 is a perspective view of the to-be-packaged filling device 116 at the station IV, and shows a state where the chuck 38 is raised to the rising end position. FIG. 13 is a perspective view of the to-be-packaged filling device 116 at the station IV, and shows a state where the chuck 38 is being lowered. FIG. 14 is a perspective view of the article filling apparatus 116 at the station IV, and shows a state where the chuck 38 is lowered to the lower end position. FIG. 15 shows the relationship between the bag 6 and the gripper 4 when the chuck 38 is lowered, where (a) is a front view and (b) is a plan view. FIG. 16 is a perspective view of the to-be-packaged filling device 116 at the station IV, and shows a state where the gripper 4 sandwiches the bag 6 and the chuck 38 has moved to the rising end position.

  Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  First, with reference to FIG. 2, an overall configuration of an intermittent transfer type vertical bag filling and packaging machine (hereinafter simply referred to as a packaging machine) 1 including an article filling device 16 according to the present invention and an outline of each packaging process will be described. FIG. 2 is a schematic configuration diagram of the packaging machine 1 including the package filling device 16.

  The packaging machine 1 includes a circular turntable 2 and a pair of left and right grippers 4 attached to the outer periphery of the rotary table 2 at predetermined intervals in the circumferential direction. Grip both side edges of the hanger. The turntable 2 is connected to an index unit (not shown) and a main motor, and the bag 6 is intermittently transferred as the turntable 2 rotates. Further, the pair of grippers 4 are configured so as to be able to contact and separate from each other, and the bag mouth of the bag 6 can be opened by being brought close to each other, and the bag mouth can be tensioned by being separated from each other. In the present embodiment, the transfer track of the bag 6 has an arc shape, but may have other shapes such as a straight line or a race track.

  The packaging process process by the packaging machine 1 is demonstrated. In the figure, Roman numerals attached along the outer periphery of the turntable 2 indicate stations for performing various packaging processes. At the station I, the upper side of both side edges of the bags 6 sequentially supplied from the conveyor magazine 8 is gripped by the gripper 4 and held in a vertical state. On the outer surface of the bag 6 transferred in this state, the date of manufacture is printed by the printer 10 at the station II. At the station III, the bag mouth of the bag 6 is opened by the suction cup pair 12 while the pair of grippers 4 are brought close to each other, and the opened state is held by the opening guide 14. In the station IV, an article filling device 16 is disposed, and an article to be packaged is filled into the opened bag 6 by an auger filling device 18. The to-be-packaged filling device 16 includes the above-described auger-type filling device 18 and a gripping and weighing device 28 (see FIG. 3) for gripping and weighing the transferred bag 6 from the gripper 4. 40. The package filling device 16 will be described later.

  In the station V, the planned sealing portion on the inner surface of the bag mouth is cleaned by the air jet nozzle 42 that can be raised and lowered. In the station VI, after inserting a gas blowing nozzle 44 connected to an inert gas source (not shown) into the bag 6, the pair of left and right grippers 4 are separated from each other to tension the bag mouth, and the inert gas is discharged from the gas blowing nozzle 44. Is injected to replace the air in the bag 6 with gas. In the stations VII and VIII, the first sealing step and the second sealing step of the bag mouth are performed using the pair of hot plates 46 and 48, respectively, and in the station IX, the bag mouth is cooled using the pair of cooling plates 50, The bag 6 is discharged to the chute 52 as a finished product containing the package. Station X is spare.

  With reference to FIG. 3, the to-be-packaged article filling apparatus 16 is demonstrated in detail. FIG. 3 is a perspective view of the article filling device 16 at the station IV, and shows a state immediately after the bag 6 has been transferred to the station IV. In FIG. 3 and other drawings, a part of the internal structure is indicated by a broken line.

  As described above, the to-be-packaged filling device 16 includes the auger-type filling device 18 and the refill weighing device 28. The auger-type filling device 18 has a funnel-shaped tank 20 for storing powder (not shown) as an object to be packaged, and a nozzle 22 having a discharge port 24 is provided at the lower end of the tank 20. . An auger screw 26 driven by a servo motor (not shown) is disposed in the tank 20 so as to reach the discharge port 24. By rotating the auger screw 26, the object to be packaged stored in the tank 20 is rotated according to the rotated angle. An amount is discharged from the discharge port 24.

  The gripping and weighing device 28 is a device for gripping the bag 6 from the gripper 4, and includes a support member 30, an elevating member 32, a metering device 34, and a chuck 38. The support member 30 is a columnar member that is erected on a base (not shown) of the packaging machine 1 and extends in the vertical direction, and an elevating member 32 is provided on a side surface of the support member 30 so as to be movable up and down. A measuring instrument 34 for measuring the weight of an object to be packaged in the bag 6 is provided at the end of the elevating member 32 opposite to the support member 30, and a plate is provided at the end of the measuring instrument 34 opposite to the elevating member 32. A pair of left and right open type chucks 38 is attached via a chuck-like chuck support member 36, and the weighing device 34 and the chuck 38 are moved up and down integrally with the lifting member 32. In FIG. 3, the elevating member 32 (and the measuring device 34, chuck 38) is located at the lowest position (lower end position), and the chuck 38 is above the gripper 4 of the bag 6 that has been transferred to the station IV. It arrange | positions in the position which can clamp both the side edge parts. With this as the initial position, the re-holding weighing device 28 waits for the bag 6 to be transferred with the chuck 38 opened (open state).

  With reference to FIGS. 3 to 9, description will be given of a gripping change process, a bag lifting process, a filling process, and a gripping return process of the bag 6 by the package filling device 16. FIG. First, the re-holding process will be described with reference to FIGS. FIG. 4 is a perspective view of the to-be-packaged filling device 16 in the station IV as in FIG. 3, and shows a state in which the grip 6 is replaced by the chuck 38 and the pair of grippers 4 are moved to the separation positions.

  As described above, the chuck 38 stands by in an open state. When the bag 6 is transferred to the station IV, the chuck 38 is closed, and the side edges on both sides of the bag 6 above the gripper 4 are held by the chuck 38 as described above. When the bag 6 is clamped by the chuck 38, the gripper 4 is then released, and the bag 6 is gripped from the gripper 4 to the chuck 38. Then, after gripping, the pair of left and right grippers 4 are separated from each other as shown in FIG. 4 and moved to a position (separation position) that does not interfere with the bag 6 in the width direction of the bag 6. Note that the bag 6 is kept open by the chuck 38 after the gripping.

  Next, the bag raising process will be described with reference to FIG. FIG. 5 is a perspective view of the to-be-packaged filling device 16 at the station IV, and shows a state in which the chuck 38 is raised to the raised end position.

  When the gripping / replacement process of the bag 6 is completed, the chuck 38 is moved up together with the elevating member 32. Since the bag 6 is in an open state, when the bag 6 is raised, the nozzle 22 of the tank 20 disposed just above the bag 6 enters the bag 6. The ascending operation of the chuck 38 stops when the discharge port 24 of the nozzle 22 reaches a position away from the bottom of the bag 6 by a predetermined distance, and the position of the chuck 38 at this time is referred to as an ascending end position.

  At the completion of the gripping / replacement operation of the bag 6, as in the prior art shown in FIG. 1, the gripper 4 is in the approach position, the lateral width gradually increases downward from the bag mouth, and the lateral width is maximum at the bottom. (Maximum width). Therefore, although the lateral width of the portion of the bag 6 located below the gripper 4 is wider than the interval between the pair of grippers 4, the gripper 4 is not lifted when the bag 6 is raised as in the state shown in FIG. Since it has moved to the separation position, the gripper 4 and the side edge of the bag 6 do not interfere with each other.

  Subsequently, the filling process will be described with reference to FIGS. FIGS. 6 and 7 are perspective views of the package filling device 16 at the station IV. The former shows a state in which the pair of chucks 38 are lowered, and the latter shows the state in which the chucks 38 are lowered to the lowered end position. . 8A and 8B show the relationship between the bag 6 and the gripper 4 when the chuck 38 is lowered, where FIG. 8A is a front view and FIG. 8B is a plan view.

  When the chuck 38 reaches the ascending end position, the auger screw 26 is rotated to start filling the bag 6 with the article to be packaged (powder). As described above, since the discharge port 24 of the nozzle 22 of the tank 20 is located near the bottom of the bag 6 at this time, the powder does not rise due to the filling drop. When the filling is started, the chuck 38 starts to descend (FIG. 6). The lowering of the chuck 38 is performed so as to correspond to the filling amount (per unit time) of the object to be packaged, and the distance between the discharge port 24 of the nozzle 22 and the uppermost part of the object to be filled in the bag 6 is substantially constant. Is desirable. This can prevent the powder from rising all the time during filling. In this embodiment, the packaged material is powder, but it may be a viscous material or a solid material. In these cases as well, there are problems caused by filling heads such as rebound and impact at the time of landing on the bag bottom. Can be solved.

  As described above, the chuck 38 is connected to the measuring device 34, and the filling is completed when the measured value by the measuring device 34 reaches the target filling amount. After completion of filling, the chuck 38 is lowered to the lower end position, and the lowering operation is completed (FIG. 7). As shown in FIG. 8, the gripper 4 is located at the separation position during the filling process, as in the bag raising process, and the interval W2 is larger than the width W (see FIG. 1) of the bottom, which is the maximum width part of the bag 6. It is set large. Therefore, the bag 6 and the gripper 4 do not interfere even when the bag 6 is lowered to the lowered end position. In the present embodiment, the powder filling is finished before the chuck 38 reaches the lowered end position. However, the filling may be finished at the same time or after the arrival.

  Finally, with reference to FIG. 9, the process of gripping and returning the bag 6 will be described. FIG. 9 is a perspective view of the packaging material filling apparatus 16 at the station IV, showing a state where the bag 6 is gripped back, the gripper 4 holds the bag 6 in the approach position, and the chuck 38 is opened. .

  The process of returning the bag 6 is the reverse of the process of changing the grip. That is, after the bag 6 filled with the article to be packaged is lowered to the lower end position, the pair of opened grippers 4 are moved to the approach position, and the both side edges of the bag 6 are sandwiched again, and then the chuck 38 is opened, and the bag 6 is gripped back from the chuck 38 to the gripper 4. After the grip-back process is completed, the bag 6 filled with the article to be packaged is intermittently transferred to the next process by the gripper 4, and a new bag 6 is transferred from the previous process. Thereafter, the same process is performed.

  According to the present embodiment, the bag 6 can be gripped by the gripper 4 without performing an additional operation such as retracting to the outside in the radial direction of the rotary table 2 until the gripper 4 grips the gripper 4 after the gripping is changed. Can be moved up and down without interference. Therefore, in order to suppress the filling drop, the bag 6 is lowered in accordance with the filling amount of the object to be packaged, and the bag 6 re-gripped by the chuck 38 is filled while being measured by the measuring device 34 in order to improve the filling accuracy. It is possible to combine the configurations to be performed without reducing productivity. Further, the gripper 4 is generally configured so as to be freely contacted and separated because of opening and tensioning the bag 6. Therefore, the above effect can be easily obtained by adjusting the timing of movement of the pair of grippers 4 without adding a special configuration.

  In the present embodiment, the chuck 38 is a double-open type in order to avoid interference between the bag 6 and the chuck 38 which are transferred to the station IV with the bag mouth inflated. However, for example, the chuck 38 can be moved in the front-rear direction (the radial direction of the turntable 2), and the chuck 38 can be retracted to a position where it does not interfere with the bag 6 to adopt the other configuration. The interference between the bag 38 and the bag 6 may be avoided.

  In this embodiment, the bag 6 is moved up after the pair of left and right grippers 4 are moved to the separation position. However, if the gripper 4 and the bag 6 do not interfere with each other, after the bag 6 starts moving up. It is also possible to constitute the gripper 4 so as to be separated at (especially at the initial rise). Further, the gripper 4 is moved to the approach position after the bag 6 is lowered to the lower end position. However, if the gripper 4 and the bag 6 do not interfere with each other, before the bag 6 finishes the lowering movement (especially at the end of the lowering). It is also possible to configure the gripper 4 so as to be close. With this configuration, the processing capacity can be improved.

  A second embodiment of the present invention will be described with reference to FIG.

  The configuration of the packaging machine 101 (not shown) including the package filling device 116 according to the second embodiment is substantially the same as that of the packaging machine 1 according to the first embodiment. The difference is that a body forming member 160 and a bag bottom forming member 166 are provided. In addition, since there are also differences in various processes related to filling by the packaged filling device 116, only the differences from the first embodiment will be described below.

  First, the configuration of the bag body forming member 160 and the bag bottom forming member 166 will be described with reference to FIG. FIG. 10 is a perspective view of the to-be-packaged filling device 116 in the station IV, and shows a state immediately after the bag 6 has been transferred to the station IV. In addition, the same code | symbol is demonstrated about the member similar to the packaging machine 1 which concerns on 1st Embodiment among the structures of the packaging machine 101 which concerns on 2nd Embodiment. In the present embodiment, the chuck 38 is a single-open type composed of a fixed piece and a movable piece.

  The bag body forming member 160 is a pair of members extending downward from both end portions of the chuck support member 36. More specifically, the bag body portion molding member 160 is attached to the rotary shaft 162 extending downward from both ends of the chuck support member 36 and having a plate-like connecting portion 163 attached to the tip thereof, and to the end portion of the connecting portion 163. The plate-shaped narrow pressure member 164 having a substantially U-shaped cross section is formed. The pair of bag body forming members 160 rotate the rotating shaft 162 so that each narrow pressure member 164 has an approach position where the U-shaped inner surfaces face each other and are closer than the gap between the grippers 4. They can be freely contacted and separated from each other at a separation position where they are separated from each other and opened approximately 180 °. On the other hand, the bag bottom portion molding member 166 is connected to the measuring instrument 34 and extends vertically downward, and is supported at the tip of the support portion 168 and is attached to the rod-shaped molding portion 170 so as to be rotatable in the vertical plane. It consists of. As shown in the figure, the molding portion 170 is substantially between the retracted position that is substantially parallel to the bag 6 so as to be in a straight line with the support portion 168 and the molding position that is substantially horizontal to the bag 6. It can be rotated over a range of 90 °. This will be described later.

  Next, with reference to FIGS. 10 to 16, the bag 6 grasping process, the bag raising process, the filling process, and the grasping return process by the package filling device 116 according to the second embodiment will be described. First, the process of changing the bag 6 will be described with reference to FIGS. FIG. 11 is a perspective view of the to-be-packaged filling device 116 at the station IV, as in FIG. 10, and shows a state in which the chuck 38 is moved to the lowered end position and the bag body forming member 160 is in the approach position.

  As shown in FIG. 10, in the standby state, the elevating member 32 of the re-holding and measuring device 128 is located at the ascending end position, the chuck 38 is in the open state, the bag body forming member 160 is in the separating position, and the bag bottom forming member 166. Is in the retracted position. When the bag 6 is transferred to the station IV, as shown in FIG. 11, after the chuck 38 of the gripping and weighing device 128 is lowered to the lower end position, the chuck 38 is closed and the gripper 4 of the bag 6 is held by the chuck 38. The both side edges on the upper side are sandwiched. Thereafter, the gripper 4 is opened, so that the bag 6 can be gripped from the gripper 4 to the chuck 38 in an open state. At the same time that the bag 6 is clamped by the chuck 38, the pair of bag body portion molding members 160 are moved to the approaching position to narrow the body portion of the bag 6 (the lower portion than the gripper 4) and The lateral width of the part is made narrower than the distance between the pair of grippers 4 (see FIG. 11). This completes the gripping process. As described above, the bag 6 and the opening guide 14 interfere with the chuck 38 at the time of transfer by transferring the bag 6 to the station IV in a state where the chuck 38, the elevating member 32, and the measuring device 34 are kept at the rising end position. Can be surely prevented.

  Next, the bag raising process will be described with reference to FIG. FIG. 12 is a perspective view of the to-be-packaged filling device 116 at the station IV, and shows a state where the chuck 38 is raised to the rising end position.

  Waiting for completion of the gripping of the bag 6, the ascending movement of the chuck 38 is started. At this time, since the bag 6 is in an open state, when the bag 6 is raised, the nozzle 22 of the tank 20 disposed immediately above the bag 6 enters the open bag 6. When the chuck 38 reaches the rising end position, the raising operation is stopped and the bag raising process is completed.

  By adopting the above-described configuration, when the bag 6 is lifted, the pair of bag body forming members 160 are in the approaching position. Therefore, as in the state shown in FIG. There is no interference with the body portion of 6, and there is no problem such as the occurrence of pinholes due to the gripper 4 being caught on the bag 6. In this embodiment, the bag body forming member 160 is brought closer to the approaching position at the same time when the chuck 38 holds the bag 6, but the bag body forming member 160 is not necessarily moved to the approaching position. It is not limited to timing. The movement only needs to be completed before the body of the bag 6 passes between the pair of grippers 4, and may be performed after gripping by the chuck 38 is completed.

  Subsequently, the filling process will be described with reference to FIGS. FIGS. 13 and 14 are both perspective views of the article filling device 116 at the station IV. The former shows a state in which the chuck 38 is lowered, and the latter shows a state in which the chuck 38 is lowered to the lower end position. FIG. 15 shows the relationship between the bag 6 and the gripper 4 when the chuck 38 is lowered, where (a) is a front view and (b) is a plan view.

  When the chuck 38 reaches the rising end position, the auger screw 26 is rotated to start filling the bag 6 with the article to be packaged (powder), and the bag bottom molding member 166 is moved to the molding position. The bottom is pressed from below, and the vicinity of the center in the width direction of the bottom is recessed upward. Further, as in the first embodiment, the lowering of the chuck 38 is started in accordance with the start of filling (FIG. 13).

  As described above, the chuck 38, the bag body forming member 160, and the bag bottom forming member 166 are all integrally attached to the measuring instrument 34, and the amount of filling by the measuring instrument 34 can be managed. When the measured value reaches the target filling amount, the filling is finished, the chuck 38 is lowered to the lower end position, and the filling process is completed (FIG. 14). As shown in FIG. 15, as in the bag raising process, the bag body forming member 160 is located in the approaching position during the filling process, and the distance between the pair of bag body forming members 160 is greater than the distance W3 between the pair of grippers 4. Since it is set small, the bag 6 does not interfere with the gripper 4 during the lowering operation. Further, by denting the bag bottom upward by the bag bottom portion molding member 166, the bottom portion of the bag 6 is folded so that the lateral width is narrowed, and the bag body portion molding member 160 holds the bag 6 at a narrow pressure. There is an assisting action. Therefore, the body of the bag 6 can be held narrower than the distance W3 between the pair of grippers 4 without setting the narrow pressure by the bag body forming member 160 so high. Further, since the narrow pressure can be suppressed, damage to the bag 6 by the bag body forming member 160 can be suppressed.

  Finally, with reference to FIG. 16, the step of gripping and returning the bag 6 will be described. FIG. 16 is a perspective view of the to-be-packaged filling device 116 at the station IV, and shows a state where the gripper 4 sandwiches the bag 6 and the chuck 38 has moved to the rising end position.

  In the step of gripping and returning the bag 6, first, the bag 6 filled with the powder is moved back and forth until the bag 6 reaches the lower end position, and the pair of bag body forming members 160 are moved away from each other and moved to the separated position. The forming member 166 is moved to the retracted position. As a result, the bag 6 is released from the narrowed state, and the bag 6 returns to the normal filling state as shown in the figure. Then, the grippers 4 that have been waiting in the open state are held between the side edges of the bag 6 again, the chuck 38 is opened, and the bag 6 is gripped back from the chuck 38 to the gripper 4. Finally, the raising / lowering member 32 of the grasping and weighing device 128 is raised to the ascending end position, and the grasping and returning process of the bag 6 is completed. After completion of the grip-back process, the bag 6 filled with the article to be packaged is intermittently transferred to the next process by the gripper 4, and a new bag 6 is transferred from the previous process, and thereafter the same process is performed.

  In the present embodiment, only by adding a simple configuration such as a pair of bag body forming members 160 that can be brought into and out of contact with each other, for example, without performing an additional operation such as retracting to the outside in the radial direction of the turntable 2. The bag 6 can be raised and lowered without interfering with the gripper 4. In this way, the bag 6 is lowered in accordance with the filling amount of the article to be packed in order to suppress the filling drop, and the bag 6 re-gripped by the chuck 38 is measured by the measuring instrument 34 in order to improve the filling accuracy. It is possible to combine the structures to be filled without reducing the productivity.

  In the present embodiment, in the filling process, the filling of the article to be packaged is started, and the bag bottom portion forming member 166 is moved to the forming position to press the bag bottom. However, after the filling starts or prior to filling. The bag bottom may be pressed and deformed. For example, it can be set at various timings with respect to the start of filling, such as immediately after the start of filling, immediately before the bag 6 is raised, or while the bag 6 is being raised.

  As shown in the drawing, the chuck 38 is configured to be opened in a downward state, but may be configured to be opened in a sideways state. Accordingly, by adjusting the position of the chuck 38 in the height direction, any portion of the bag 6 above the gripper 4 can be clamped.

  As shown in FIG. 15B, the gripper 4 and the chuck 38 are arranged such that the position of the clamping surface for clamping the bag is slightly shifted from each other in the radial direction of the rotary table 2 (up and down direction on the paper surface). Accordingly, it is possible to avoid the lower end portion of the fixed piece of the chuck 38 from colliding with the upper portion of the bag 6 when the chuck 38 is lowered in the gripping replacement process.

  In this embodiment, when the bag 6 is transferred to the station IV, the chuck 38 waits in a state where it moves to the rising end position, but is positioned at the lower end position as shown in the first embodiment. You may make it wait for the bag 6 as it is. On the other hand, in the first embodiment, the transfer of the bag 6 may be waited with the chuck 38 moved to the raised end position.

  Further, the configuration of moving the gripper 4 shown in the first embodiment to the separation position and the configuration of the bag trunk portion molding member 160 and the bag bottom portion molding member 166 shown in the second embodiment may be used in combination. Is possible.

1: Packing machine 2: Rotary table 4: Gripper 6: Bag 16: Package filling device 18: Auger type filling device 20: Tank 22: Nozzle 24: Discharge port 28: Refilling weighing device 32: Lifting member 34: Weighing Device 38: chuck 160: bag body forming member 166: bag bottom forming member

Claims (5)

A pair of left and right grippers for holding the bag in a suspended state with both side edges open upward and intermittently transporting the bag along a predetermined trajectory in a horizontal plane are provided. In the method of filling an article to be packaged in an intermittent transfer type vertical bagging and packaging machine that sequentially performs the packaging process,
While sandwiching the side edges of the bag that has been transferred to a predetermined intermittent stop position by the gripper and stopped at a position above the gripper with a pair of left and right chucks disposed at the predetermined intermittent stop position, A gripping step of opening the gripper and gripping the bag from the gripper to the chuck, and separating the pair of left and right grippers from each other until the gap is wider than the maximum width portion of the bag;
The chuck is lifted by a predetermined distance, and the discharge port of the auger type filling device arranged at the predetermined intermittent stop position is inserted into the bag, and the tip of the discharge port is separated from the bottom of the bag by a predetermined interval. A bag raising process to be located at a position;
While discharging the object to be packaged from the discharge port, the chuck is gradually lowered by the predetermined distance, and the weight of the object to be packaged in the bag is measured, and when the measured value reaches the target filling amount A filling step for ending filling by the auger filling device;
A gripping back step of bringing the pair of left and right grippers close to each other and holding the both side edges of the bag again, then opening the chuck and gripping the bag from the chuck to the gripper. A method for filling a package. A pair of left and right grippers for holding the bag in a suspended state with both side edges open upward and intermittently transporting the bag along a predetermined trajectory in a horizontal plane are provided. In the method of filling an article to be packaged in an intermittent transfer type vertical bagging and packaging machine that sequentially performs the packaging process,
While sandwiching the side edges of the bag that has been transferred to a predetermined intermittent stop position by the gripper and stopped at a position above the gripper with a pair of left and right chucks disposed at the predetermined intermittent stop position, The gripper is opened, the bag is gripped from the gripper to the chuck, the pair of left and right bag body forming members are brought closer to each other than the distance between the pair of left and right grippers, and the bag body is moved in the width direction. A re-holding process that holds the pressure tightly from both sides;
The chuck and the bag body forming member are simultaneously lifted by a predetermined distance, and the discharge port of the auger type filling device arranged at the predetermined intermittent stop position is inserted into the bag, and the tip of the discharge port is inserted into the bag. A bag raising step to be positioned at a predetermined distance from the bottom of the bag;
While discharging the object to be packaged from the discharge port, the chuck and the bag body forming member are gradually lowered by the predetermined distance, and the weight of the object to be packaged in the bag is measured, and the measured value is the target. When the filling amount is reached, filling by the auger type filling device is terminated, and the bag body part forming member is separated to release the narrow pressure to the body part, and
A gripping step of re-holding the both side edges of the bag after filling the package with the pair of left and right grippers, then opening the chuck and gripping the bag from the chuck to the gripper. A method for filling an article to be packaged. In the method for filling an article to be packed according to claim 2,
At least in the filling step, the bag bottom portion forming member dents the vicinity of the center in the width direction of the bag at the bottom from the predetermined timing with respect to the start of filling of the article to be packed. A method for filling an article to be packaged. A pair of left and right grippers for holding the bag in a suspended state with both side edges open upward and intermittently transporting the bag along a predetermined trajectory in a horizontal plane are provided. In the package filling device in the intermittent transfer type vertical bagging and packaging machine that sequentially performs the packaging process,
An auger-type filling device disposed at a predetermined intermittent stop position;
A weighing instrument provided so as to be movable up and down, a chuck integrally connected to the weighing instrument and sandwiching both side edges of the bag at a position above the gripper, and integrally connected to the weighing instrument; A pair of left and right bag body forming members that can be brought into contact with and separated from each other, and a gripping and weighing device disposed at the predetermined intermittent stop position,
The pair of left and right bag body forming members of the gripping and weighing device approach each other until the distance between the pair of left and right grippers is narrower than the distance between the pair of left and right grippers while sandwiching the body of the bag from both sides in the width direction. An apparatus for filling an article to be packaged, wherein the bag is held in a narrow pressure state. In the packing object filling apparatus according to claim 4,
The gripping and weighing device further includes a bag bottom molding member that is integrally connected to the meter and is narrower than the bottom of the bag,
The bag bottom portion molding member is movable between a molding position that presses substantially the center in the width direction of the bottom portion of the bag upward and a retracted position that does not interfere with the bag. apparatus.

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