JP2015067306A - Steam replacement deaeration method and device in bag filling packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steam replacement deaeration method and device capable of reliably capturing injected steam even when a bag is empty, and preventing occurrence of various problems such as deterioration of a work environment, contamination of a packaging machine, and failure of a peripheral equipment.SOLUTION: A sensor 15 is provided to detect whether or not a packed object is packed in a bag B. When it is packed, a nozzle 33 is moved from a standby position to a descent end position, a discharge port at a nozzle lower end is inserted into the bag, and steam is blown thereinto. At that time, the steam flowing upward from a hood disposed in the upper part of the nozzle is collected. When the packed object is not packed, the nozzle is moved to a retreat position, a steam receiving container 45 is made to enter between the nozzle and bag, the nozzle is moved to a steam disposal position, and the steam is injected toward the inside of the container. The steam flowing upward from the container is collected through the hood.

Description

  The present invention relates to a steam replacement deaeration method and apparatus in bagging and packaging. More specifically, the left and right edge portions of the bag are clamped by a pair of left and right grippers that can be separated from each other, the bag is held in a suspended state in a vertical posture with the bag mouth facing upward, and the bag is placed in a horizontal plane. In particular, the present invention relates to a steam replacement deaeration method and apparatus in bag-packing packaging in which predetermined packaging processing such as opening of a bag mouth, filling of an object to be packaged, sealing of the bag mouth, etc. is sequentially performed while being transferred along a predetermined movement trajectory.

  When bagging food or the like, the air in the bag may be replaced with steam after the packaged material is filled, and deaerated. Japanese Patent No. 515996 discloses an example of such a steam replacement deaeration device. In the apparatus, the sensor 26 is used to detect whether or not the packaged item is normally filled in the bag 20. If normal filling is not performed, the steam blowing nozzle 30 is swung in the vertical plane when the bag is transferred to the steam replacement deaeration process position, and the nozzle outlet is set in the bag. After being directed toward the intake cylinder 50 from the position with respect to the mouth, steam injected from the nozzle at a predetermined timing is sucked by the intake cylinder.

  As a result, since steam is not blown into the empty bag, control is performed to stop all the operations such as sealing the bag mouth in the subsequent process, and the empty bag is used again for packaging processing. It can be performed. Thereby, generation | occurrence | production of a defective bag can be prevented and efficient packaging is attained. However, the steam replacement deaerator disclosed in Japanese Patent No. 515996 has the following problems.

  That is, even though the steam blown from the steam blowing nozzle is sucked by the intake cylinder, the amount of the steam that is blown is the same as the amount that is blown into the bag in which the package is normally filled. There is a considerable amount. For this reason, it is impossible to inhale all of them, and it is inevitable that steam will scatter to the surrounding area. In addition, since steam has a specific gravity lighter than air, even if steam is jetted downward, it immediately flows upward. Therefore, when the steam is sucked downward as in this example, the steam recovery efficiency is deteriorated. Therefore, problems such as deterioration of the working environment, contamination of the packaging machine, and failure of peripheral devices arise.

Japanese Patent No. 515996

The present invention has been made in view of the above-described problems of the prior art, and is capable of performing reliable and stable steam replacement deaeration with a simple configuration and solving the above-described conventional problems. Let it be an issue.

In order to solve the above problems, the present invention provides a steam replacement deaeration method having the following configuration. In this method, a pair of left and right grippers hold the side edges of the bag, hold the bag in a vertical posture with the bag mouth facing upward, and move the bag along a predetermined movement trajectory in a horizontal plane. It is a steam replacement deaeration method in bagging and wrapping for bagging the packaged items,
A detection step of detecting whether the package is filled in the bag by detection means;
When it is detected in the detection step that the package is filled with the article to be packaged, a steam replacement deaeration step is performed, and in the steam replacement deaeration step,
A nozzle insertion step of lowering the steam blowing nozzle waiting at a standby position set at a height position not interfering with the bag to be transferred and allowing the lower discharge port to enter the bag;
A steam blowing step for blowing steam into the bag before and after the steam blowing nozzle reaches a predetermined lower end position;
A steam recovery step for recovering steam via a steam recovery hood disposed above the steam blowing nozzle and connected to a suction source;
A nozzle returning step for returning the steam blowing nozzle from the lowered position to the standby position;
A steam blowing stop step for stopping the blowing of steam before the start of the nozzle return step or immediately before the discharge port of the steam nozzle comes out of the bag mouth of the bag at the latest in the nozzle return step;
Carried out
If it is not detected in the detection step that the bag is filled with an article to be packaged, a steam recovery step is performed, and in the steam recovery step,
A nozzle retracting step for moving the steam blowing nozzle from the predetermined standby position to a predetermined retracted position;
A container placement step of moving the steam receiving container whose upper end is opened from the container standby position to a steam receiving position located between the steam blowing nozzle located at the retracted position and the bag mouth of the bag;
A disposal preparation step of positioning the steam blowing nozzle at a disposal position, the discharge port of which is located in the steam receiving container or above the steam receiving container,
A steam disposal step for blowing and discarding steam into the steam receiving container;
A waste steam recovery step of recovering the steam discarded via the steam recovery hood;
A post-discard nozzle return step for returning the steam blowing nozzle from the predetermined discard position to the predetermined standby position;
A container return step for returning the steam receiving container to a container standby position after the discharge port of the steam blowing nozzle is positioned above the upper opening end of the steam receiving container in the process of returning the nozzle after the disposal. It is supposed to be implemented.
In the above method, the standby position can be set to the same position as the retracted position, and the discard position can be set to the same position as the retracted position.
Further, in the above method, the standby position is set to a position lower than the retracted position, and in the nozzle retracting step of the steam collecting step, the steam blowing nozzle is raised from the standby position to the retracted position. Can be configured.
In order to solve the above problems, the present invention provides a steam replacement deaerator having the following configuration. The device sandwiches both side edges of the bag with a pair of left and right grippers, holds the bag in a vertical posture with the bag mouth facing upward, and moves the bag along a predetermined movement trajectory in a horizontal plane. It is a steam replacement deaeration device in bagging and wrapping that performs bagging of packages.
A detection device for detecting whether or not a bag is filled with an article to be packaged;
A steam blowing nozzle having a discharge port formed at a lower end and connected to a steam supply source via a steam supply pipe, connected to a first lifting drive source, and having a predetermined standby position, a lowered end position, and a retreat A steam blowing nozzle configured to be movable up and down between a position and a disposal position;
A switching valve for opening and closing the supply of steam from the steam supply source to the steam blowing nozzle;
A steam container that is open at the top and is connected to a drive source and is located between the steam standby nozzle and the bag mouth of the bag. A steam receiving container that is movable between the receiving position and
A steam collection hood disposed above the steam blowing nozzle and connected to a suction source;
Based on a signal from the detection device, the elevating movement of the steam blowing nozzle, and a control means for controlling the drive source of the steam recovery container,
The predetermined standby position is set as a position where the discharge port of the steam blowing nozzle is located above the bag port of the bag, and the predetermined lower end position is the position where the discharge port of the steam blowing nozzle is the bag. The predetermined retraction position is set as a position where the discharge port of the steam blowing nozzle is positioned above the upper opening end of the steam receiving container, and the predetermined retraction position is set to the predetermined retraction position. The disposal position is set as a position where the discharge port of the steam blowing nozzle is located in or above the steam receiving container.
In the above apparatus, the elevating drive source includes a cam, and the steam replacement deaeration device is further connected to the drive source and moves between a lowered position and an elevated position, and when moved to the elevated position, It can be set as the structure provided with the stopper which can prevent that a steam blowing nozzle moves below from the said retracted position.
Furthermore, in the above apparatus, the nozzle is connected to the lifting drive source and is attached to a vertically movable lifting shaft, and the stopper prevents the lifting shaft from being lowered when positioned at the raised position. Can be configured to prevent downward movement from the retracted position.
Further, in the above apparatus, the steam replacement deaeration device further includes a second lifting drive source attached to a lifting member of the first lifting drive source, and the steam blowing nozzle is the second lifting drive source. And when the second elevating drive source is not activated, the first elevating drive source is activated and the steam blowing nozzle is moved up and down between the standby position and the lowered end position, When the second raising / lowering driving source is operating, the first raising / lowering driving source is activated, and the steam blowing nozzle moves up and down between the retracted position and the discarding position, and the control device detects the detection The second lifting drive source can be controlled based on a signal from the apparatus.
Furthermore, in the above apparatus, a waste pipe can be attached to the bottom of the steam receiving container.

According to the first and fourth aspects of the present invention, when the bag is not filled with an article to be packaged, the steam receiving container is inserted between the steam blowing nozzle and the bag mouth of the bag, and the steam receiving container Steam was blown toward the top, and the steam flowing upward from the inside of the container was collected through a steam collection hood installed above the steam blowing nozzle. Since the steam receiving container is located above the bag, it is possible to reliably prevent the intrusion of steam into the bag and reduce the scattering of the steam, thereby deteriorating the working environment, contamination of the packaging machine, and failure of peripheral equipment. Can be prevented. Further, since the steam collection hood is disposed above the steam blowing nozzle, the steam can be reliably and stably collected.
According to the third and seventh aspects of the present invention, when the bag is filled with an article to be packaged, the distance between the bag mouth and the lower end outlet of the steam blowing nozzle can be minimized. The ratio of the steam blowing time (for one step) can be increased, and steam replacement deaeration can be performed more reliably.
According to the fifth and sixth aspects of the present invention, since the lifting shaft is separated from the lifting drive source and the nozzle is held at the retracted position by the operation of the stopper, the ascending drive for raising the standby position to the retracted position. A source is not required, and the number of parts from the lifting shaft to the steam blowing nozzle can be reduced and the weight can be reduced. Therefore, when the packaging capacity is increased, vibration of the steam blowing nozzle hardly occurs, and a more stable packaging machine can be operated.
According to the eighth aspect of the present invention, water generated by liquefying steam in the steam receiving container is immediately recovered into the drain recovery container through the pipe connected to the bottom of the container. Therefore, the water remaining in the container is not sprayed to the outside of the container by the steam that is blown in, and the bag is not polluted, the packaging machine is contaminated, and peripheral devices are not broken.

It is a schematic block diagram of the bagging and packaging machine provided with the steam substitution deaeration device of the present invention. It is a figure explaining the schematic structure of the steam piping used with the steam substitution deaerator of the present invention. It is a figure which shows a part of steam substitution deaeration process in 1st Embodiment. It is a figure which shows a part of steam substitution deaeration process in 1st Embodiment. It is a figure which shows a part of steam substitution deaeration process in 1st Embodiment. It is a figure which shows a part of steam substitution deaeration process in 1st Embodiment. It is a figure which shows a part of steam collection process in 1st Embodiment. It is a figure which shows a part of steam collection process in 1st Embodiment. It is a figure which shows a part of steam collection process in 1st Embodiment. It is a figure which shows a part of steam collection process in 1st Embodiment. It is a figure which shows a part of steam collection process in 1st Embodiment. It is a figure which shows a part of steam collection process in 1st Embodiment. It is a figure which shows a part of steam substitution deaeration process in 2nd Embodiment. It is a figure which shows a part of steam substitution deaeration process in 2nd Embodiment. It is a figure which shows a part of steam substitution deaeration process in 2nd Embodiment. It is a figure which shows a part of steam substitution deaeration process in 2nd Embodiment. It is a figure which shows a part of steam collection process in 2nd Embodiment. It is a figure which shows a part of steam collection process in 2nd Embodiment. It is a figure which shows a part of steam collection process in 2nd Embodiment. It is a figure which shows a part of steam collection process in 2nd Embodiment. It is a figure which shows a part of steam collection process in 2nd Embodiment. It is a figure which shows a part of steam collection process in 2nd Embodiment.

Hereinafter, a steam replacement degassing method and apparatus according to an embodiment of the present invention will be described with reference to the drawings. First, with reference to FIG. 1, the structure of the bagging and packaging machine 1 which uses the steam substitution deaeration apparatus of this invention is demonstrated.

  A bag filling and packaging machine (hereinafter simply referred to as “packing machine”) 1 includes a known rotary table 3 that rotates intermittently, and the rotary table 3 holds bags B at equal intervals along the circumferential direction. A plurality of pairs of left and right grippers 5 and 5 for mounting are attached and moved intermittently along a predetermined track. In the present invention, the moving track of the grippers 5 and 5 is not limited to the circular track shown in the figure, and may be a straight line, a race track shape, or the like.

At the station I, a bag feeding process is carried out, where a conveyor magazine 7 is installed, and a pair of take-out suction cups 8 and 8 take out the bags B one by one, convert the posture into a vertical state, and gripper 5 , 5 delivered. As shown in the figure, the grippers 5 and 5 hold both side edges of the bag B, and hold the bag mouth (opening) in a suspended state in a vertical posture with the top facing upward. In the station II, a printing process is performed, and a printer 9 is provided to print the date of manufacture on the bag B. In the station III, an opening process is performed, and a pair of suction cups 11 for opening the bag mouth are provided here, and the bag mouth of the bag B is opened by contacting and separating from each other. In the station IV, a filling process is performed, and the package B is filled into the bag B through the hopper 13. Reference numeral 15 is a sensor for detecting an object to be packaged in the bag B, and is installed between the station IV and the station V. The sensor 15 determines that there is no packaged object not only whether the package B exists in the bag B but also when the bag B itself does not exist. Note that the sensor 15 for detecting an object to be packaged is not limited to the object to be filled in the bag B or directly detecting the presence of the bag B as in this example. For example, it is possible to adopt a configuration in which the sensor 15 is installed in the station IV to detect whether or not an article to be packaged has passed through the hopper 13. In the present specification and claims, the bag B is actually used. The presence of the packaged item in the bag B, including the detection of the presence of the packaged item in the bag, the absence of the bag B, the detection of the filling of the packaged item in the bag B, etc. Include in the concept of detecting. The sensor 15 constitutes a part of a steam replacement deaerator 31 (hereinafter referred to as “deaerator”) described later.

  In the station V, a steam replacement deaeration process is performed, and a deaeration device 31 including a steam blowing nozzle 33, a steam receiving container 45, and the like, which will be described later, is disposed. This will be described later. In the station VI, a pair of hot plates 17 and 17 are used for primary sealing of the bag mouth, and in the station VII, a pair of hot plates 19 and 19 are also used for secondary sealing of the bag mouth. In the last station VIII, the bag mouth is cooled using the pair of cooling plates 21 and 21, and then the bag B as a finished product is discharged to the chute 22. Reference numeral 23 is a control device that controls the operation of the packaging machine 1 including a deaeration device 31 described later.

  Next, a schematic configuration of the steam pipe used in the deaeration device 31 of the present embodiment will be described with reference to FIG. In the figure, reference numeral 33 denotes a steam blowing nozzle (hereinafter referred to as “nozzle”) having a discharge port 34 at its lower end, and is connected via a steam supply pipe 41 provided with a switching valve 37 and a flow rate adjusting valve 39 on the way. Connected to the steam source 35. Although not shown, when the packaging bag B moves to the station V where the steam replacement deaeration process is performed and stops, the packaging bag B is positioned below the nozzle 33. The switching valve 37 is connected to the control device 23 as indicated by a two-dot chain line in the figure. A steam collection hood 42 (hereinafter referred to as “hood”) is disposed above the nozzle 33 and is connected to a steam suction source 43 via a steam collection pipe 44. Reference numeral 45 denotes a steam receiving container, which will be described later. When the sensor 15 detects that the bag B is not filled with an article to be packaged, it is controlled by the control device 23 to start from a container standby position (not shown). , To the position shown in the drawing, that is, to the steam receiving position between the nozzle 33 and the bag B (not shown). The steam receiving container 45 is connected to a drain collector 46 via a drain recovery pipe 47 at the bottom thereof. In this figure, the steam receiving container 45 (hereinafter referred to as “container”) is located between the nozzle 33 and the bag B (not shown in FIG. 2), that is, at the steam receiving position. As shown, the air cylinder 45a is movable between the container standby position.

  Next, the operation of the deaeration device 31 according to the first embodiment will be described. First, the case where it is detected by the sensor 15 that the package B has been normally filled in the bag B will be described. The detection signal indicating the normal filling is sent to the control device 23. FIG. 3 shows a state in which the bag B, which is normally filled with the package, is transferred to the station V and stopped.

  Here, the structure which has not been demonstrated so far by the structure of the deaeration apparatus 31 is demonstrated. Reference numeral 49 denotes a hollow stand erected on the gantry 48, and an elevating shaft 51 is inserted therein so as to be movable up and down. A nozzle mounting member 53 extending in the horizontal direction is fixed to the upper end portion of the elevating shaft 51, and the nozzle 33 is held vertically by the nozzle mounting member 53. The bag B that has been moved to the station V stops just below the nozzle 33. The nozzle 33 is located at a predetermined standby position at this time, and the predetermined standby position is set such that the discharge port 34 of the nozzle 33 is positioned above the bag port of the bag B in the vertical direction. At this time, the container 45 is located at a container standby position located laterally between the discharge port 34 of the nozzle 33 and the bag B in the height direction, which will be described later.

  A lifting block 55 is fixedly attached to one end side of the lower end portion of the lifting shaft 51 extending below the frame 48, and the other end side of the lifting block 55 extending in the horizontal direction is connected to the base 57 and the frame 48. Are slidably attached to a guide shaft 59 erected between them via a bearing 61. The guide shaft 59 also serves as a detent for the lifting block 55. An air cylinder 63 is installed next to the guide shaft 59, and a block receiving member 65 is fixedly attached to the end of the rod 64 extending upward. These will be described later. Reference numeral 67 is an eccentric cam attached to a cam shaft 68 extending horizontally so as to be rotatable in a vertical plane. On the outer periphery of the eccentric cam 67, there are provided a non-displacement part 67a which is equidistant from the axis of the cam shaft 68 and a non-displacement part 67b which is equidistant R2 as shown in the figure, and the other parts are cams The displacement portion 67c changes in distance from the axis of the shaft 68. Reference numeral 70 denotes a lever that is swingably attached to a pillow block 69 erected on a base 57 via a shaft 71, and a cam follower 72 is attached to one end thereof. One end of a connecting rod 73 is rotatably attached to the other end side of the lever 70, and the other end side of the connecting rod 73 is rotatably attached to the lifting block 55 as shown. A biasing member such as a spring (not shown) is attached to the lever 70, and the lever 70 is constantly subjected to a force to rotate clockwise in the figure, so that the cam follower 72 contacts the eccentric cam 67. It touches.

  Based on the signal from the sensor 15, the control device 23 controls the deaeration device 31 to perform steam replacement deaeration as follows. That is, when it is detected that the bag B is filled with an article to be packaged, an operation of blowing steam into the bag B is performed. First, the eccentric cam 67 continuously rotating in the clockwise direction in the state shown in FIG. 3 is at the position shown in the figure, the cam follower 72 is rolling on the non-displacement portion 67a, and the lifting shaft 51 is at the rising end position. is there. When the eccentric cam 67 rotates to the position shown in FIG. 4, the cam follower 72 rolls over the displacement portion 67c and starts rolling over the non-displacement portion 67b. During this time, the elevating shaft 51 is lowered to the lower end position, whereby the nozzle 33 is inserted into the bag B from the discharge port 34 side, and the nozzle 33 is lowered to the lower end position shown in the figure. Then, before and after reaching the descending end position, the switching valve 37 is switched and steam is blown into the bag B. The nozzle 33 remains at this lowered end position while the cam follower 72 rolls on the non-displaceable portion 67b (FIG. 5). At this time, the suction source 43 of the hood 42 is also operated to suck the steam flowing upward. Continue to blow steam for a predetermined time. The eccentric cam 67 rolls on the displacement part 67c on the opposite side, passes the non-displacement part 67a again, and rolls thereon. Accordingly, the nozzle 33 returns to the standby position (FIG. 6). In this case, the injection of steam from the nozzle 33 is stopped by switching the switching valve 37 in the opposite direction, but the injection may be stopped simultaneously with or slightly before the upward movement of the nozzle 33 starts, or The discharge port 34 of the nozzle 33 may be continued until just before it comes out of the bag B. The suction of steam by the hood 42 may be continued at least while the nozzle 33 is injecting steam, or may be started slightly before the start of injection and stopped slightly after the end of injection. With the above operation, the steam replacement deaeration work is completed. The bag mouth of the bag B is closed when the grippers 5 and 5 move away from each other. The operation timing for closing the bag mouth is appropriately determined at the same time or slightly before the nozzle 33 is removed from the bag mouth. The bag B whose bag mouth is closed is transferred to the next station VI. In addition, when performing the above-mentioned deaeration operation | movement, the container 45 is located in a container standby position, and does not move.

  With reference to FIG. 7 and subsequent figures, a case will be described in which it is detected by the sensor 15 that the bag B is not properly filled with an object to be packaged, or the bag B itself is not detected. FIG. 7 shows a state in which the bag B is transferred to the station V and stopped. The cam follower 72 rolls on the non-displacement portion 67a of the rotating eccentric cam 67, and the lifting shaft 51 is raised. Located at the end position. While the eccentric cam 67 is still rolling on the non-displacement portion 67a, as shown in FIG. 8, the rod 64 of the air cylinder 63 described above is extended by a predetermined length, and the block receiving member 65 is moved up and down. The state comes into contact with the block 55 from the lower side and prevents the lifting block 55 from moving downward (FIG. 8).

The eccentric cam 67 continues to rotate. However, since the elevating block 55 is prevented from moving downward by the block receiving member 65, the eccentric cam 67 is not lowered and is held in that position (FIG. 9). The cam follower 72 is separated from the rotating eccentric cam 67. The container 45 described above moves forward by a predetermined distance when the air cylinder 45a operates, and stops at the steam receiving position. In this case, the bag B and the nozzle 33 are positioned so as not to interfere with the entering container 45. In particular, the nozzle 33 has a minimum distance between the lower end portion of the discharge port 34 of the nozzle 33 and the upper end surface of the container 45 in order to minimize the subsequent entry time into the container 45. This position of the nozzle 33 is defined as a retracted position. That is, in the example described, the above-described standby position is set to the same position as the retracted position. However, for example, the standby position can be set below the retracted position. In this case, the stroke of the air cylinder 63 is set to be longer and, for example, the air cylinder 63 is operated in FIG. Prior to this, the rod 64 of the air cylinder 63 is extended so that the nozzle 33 can be moved from the standby position to the retracted position.

  Next, the switching valve 37 is switched to inject steam from the nozzle 33 into the container 45 (FIG. 10). The distance between the discharge port 34 of the nozzle 33 and the container 45 and the size of the container 45 are set so that the injected steam is completely injected into the container 45. The position of the nozzle 33 at this time is defined as a discard position. In the example described here, the discard position is set to the same position as the above-described retraction position. However, for example, the discard position can be set to a position where the discharge port of the nozzle enters a distance within the container 45. In this case, a two-stage air cylinder 63 is used, and the rod 64 is retracted from the state shown in FIG. 10 prior to the steam injection, and the nozzle 33 is moved from the retracted position to the discarding position. The steam is stopped after spraying for a predetermined time, but at least while the steam is being sprayed, the aforementioned suction source 43 is operated to collect the steam rising from the hood 42.

When the steam injection is stopped, the container 45 is first returned to the container standby position, and the bag mouth of the bag B is closed by the operation of the grippers 5 and 5. On the other hand, the cam follower 72 comes into contact with the non-displacement portion 67a of the eccentric cam 67 and rolls thereon (FIG. 11). Next, the rod 64 of the air cylinder 63 is contracted, and the bag B is transferred to the next station VI (FIG. 12). The bag B is not subjected to a sealing process thereafter, and the bag B is collected and used again for packaging.

  Next, a second embodiment will be described with reference to FIG. Reference is first made to FIG. The deaerator 81 uses the same steam pipe shown in FIG. 2 as in the first embodiment, but the configuration for raising and lowering the nozzle 33 is different. An air cylinder 83 that moves up and down integrally with the shaft 51 is provided. That is, the air cylinder mounting plate 85 is horizontally mounted on the upper end portion of the lifting shaft 51, and the air cylinder 83 is mounted on the plate 85. A nozzle mounting plate 53 is attached to one end of the rod 84 at its one end, and a nozzle 33 is attached to the other end as shown in the figure. That is, the nozzle 33 moves up and down by moving the lifting shaft 51 and moves up and down by operating the air cylinder 83. In addition, although the raising / lowering apparatus which raises / lowers the raising / lowering axis | shaft 51 is not shown in figure, the eccentric cam 67 used in 1st Embodiment is used. However, the present invention is not limited to this, and various other known lifting drive devices can be used.

  First, the operation when it is detected by the sensor 15 that the package B is filled in the bag B will be described. FIG. 13 shows a state where the bag B has been transferred to the station V and stopped. At this time, the elevating shaft 51 is at the lower end position, the air cylinder 83 is in a state where the rod 84 is contracted, and the nozzle 33 is located at the standby position above the bag B. As can be seen from the drawing, the nozzle 33 located at the standby position interferes with the container 45 when it enters the steam receiving position.

  If the package is normally filled, the process proceeds from the state shown in FIG. 13 to the state shown in FIG. That is, the elevating shaft 51 is lowered to the lower end, and the nozzle 33 is located at the lower end position where the discharge port 34 at the tip of the nozzle 33 enters the bag B by a predetermined distance. Next, the switching valve 37 is switched, and steam is injected from the nozzle 33 (FIG. 15). The timing of injection may be the same as the timing described in the first embodiment. It is the same as in the first embodiment that the steam rising upward is sucked and collected using the hood 42 disposed above the nozzle 33. When steam is injected for a predetermined time, the switching valve 37 is switched to stop the injection, the lifting shaft 51 returns to the rising end, and the nozzle 33 returns to the standby position (FIG. 16). During the above operation, the container 45 does not operate at all as in the first embodiment.

Next, the case where it is detected by the sensor 15 that the package B is not filled in the bag B will be described with reference to FIG. FIG. 17 shows a state where the bag B has not yet moved below the nozzle 33. From this state, the air cylinder 83 is first operated, the rod 84 extends upward by a predetermined distance, and the nozzle 33 is moved to the retracted position above the standby position (FIG. 18). At this position, as can be seen from the figure, the nozzle 33 does not interfere with the entry of the container 45. In this state, the air cylinder 45a is operated, and the container 45 moves forward and stops at the steam receiving position (FIG. 19).

Next, when the elevating shaft 51 is lowered to the lower end, the nozzle 33 is also lowered to the disposal position, and the discharge port 34 enters the container 45 to a predetermined depth position. Then, steam is injected from the nozzle 33 (FIG. 20). The steam flowing upward is sucked and collected from the hood 42. After the steam is injected for a predetermined time, the switching valve 37 is switched to stop the steam injection, and the lift shaft 51 moves to the rising end, so that the nozzle moves to the retracted position (FIG. 21), and then the air cylinder 45a The receiving container 45 is operated to return to the container standby position, and the air cylinder 83 is operated to return the nozzle to the standby position (FIG. 22).

In any of the above-described embodiments, water generated by liquefying steam in the container 45 is recovered to the drain recovery unit 46 via the drain recovery pipe 47. In the above description, the table is described as being intermittently rotated. However, when the table is continuously rotated, the nozzle 33 is moved following the transfer of the bag B over a predetermined steam replacement deaeration process section, and the deaeration is performed. After the processing is completed, the original position is restored.

Claims (8)

A pair of left and right grippers sandwich the side edges of the bag, hold the bag in a vertical position with the bag mouth facing upward, and move the bag along a predetermined movement trajectory in a horizontal plane while In the steam replacement degassing method in bagging and packaging,
A detection step of detecting whether the package is filled in the bag by detection means;
When it is detected in the detection step that the package is filled with the article to be packaged, a steam replacement deaeration step is performed, and in the steam replacement deaeration step,
A nozzle insertion step of lowering the steam blowing nozzle waiting at a standby position set at a height position not interfering with the bag to be transferred and allowing the lower discharge port to enter the bag;
A steam blowing step for blowing steam into the bag before and after the steam blowing nozzle reaches a predetermined lower end position;
A steam recovery step for recovering steam via a steam recovery hood disposed above the steam blowing nozzle and connected to a suction source;
A nozzle returning step for returning the steam blowing nozzle from the lowered position to the standby position;
A steam blowing stop step for stopping the blowing of steam before the start of the nozzle return step or immediately before the discharge port of the steam nozzle comes out of the bag mouth of the bag at the latest in the nozzle return step;
Carried out
If it is not detected in the detection step that the bag is filled with an article to be packaged, a steam recovery step is performed, and in the steam recovery step,
A nozzle retracting step for moving the steam blowing nozzle from the predetermined standby position to a predetermined retracted position;
A container placement step of moving the steam receiving container whose upper end is opened from the container standby position to a steam receiving position located between the steam blowing nozzle located at the retracted position and the bag mouth of the bag;
A disposal preparation step of positioning the steam blowing nozzle at a disposal position, the discharge port of which is located in the steam receiving container or above the steam container,
A steam disposal step for blowing and discarding steam into the steam receiving container;
A waste steam recovery step of recovering the steam discarded via the steam recovery hood;
A post-discard nozzle return step for returning the steam blowing nozzle from the predetermined discard position to the predetermined standby position;
A container return step of moving the steam receiving container to a container standby position after the discharge port of the steam blowing nozzle is positioned above the upper opening end of the steam receiving container in the process of returning the nozzle after the disposal. carry out,
A steam replacement degassing method characterized by the above. 2. The steam replacement deaeration method according to claim 1, wherein the standby position is set to the same position as the retracted position, and the discard position is set to the same position as the retracted position. Deaeration method. 2. The steam replacement deaeration method according to claim 1, wherein the standby position is set to a position lower than the retracted position, and the nozzle is raised from the standby position to the retracted position in the nozzle retracting step of the steam collecting step. A steam replacement degassing method, characterized in that: A pair of left and right grippers sandwich the side edges of the bag, hold the bag in a vertical position with the bag mouth facing upward, and move the bag along a predetermined movement trajectory in a horizontal plane while In the steam replacement deaeration device for bagging and packaging,
A detection device for detecting whether or not a bag is filled with an article to be packaged;
A steam blowing nozzle having a discharge port formed at a lower end and connected to a steam supply source via a steam supply pipe, connected to a first lifting drive source, and having a predetermined standby position, a lowered end position, and a retreat A steam blowing nozzle configured to be movable up and down between a position and a disposal position;
A switching valve for opening and closing the supply of steam from the steam supply source to the steam blowing nozzle;
A steam container that is open at the top and is connected to a drive source and is located between the steam standby nozzle and the bag mouth of the bag. A steam receiving container that is movable between the receiving position and
A steam collection hood disposed above the steam blowing nozzle and connected to a suction source;
Based on a signal from the detection device, the elevating movement of the steam blowing nozzle, and a control means for controlling the drive source of the steam recovery container,
The predetermined standby position is set as a position where the discharge port of the steam blowing nozzle is located above the bag port of the bag, and the predetermined lower end position is the position where the discharge port of the steam blowing nozzle is the bag. The predetermined retraction position is set as a position where the discharge port of the steam blowing nozzle is positioned above the upper opening end of the steam receiving container, and the predetermined retraction position is set to the predetermined retraction position. The disposal position is set as a position where the discharge port of the steam blowing nozzle is located in or on the steam receiving container,
A steam replacement deaeration device characterized by the above. 5. The steam replacement deaeration device according to claim 4, wherein the elevating drive source includes a cam, and the steam replacement deaeration device further includes a stopper connected to the drive source and moved between a retracted position and an entry position. And the stopper does not hinder the movement of the steam blowing nozzle when the stopper is located at the retracted position, and the stopper is disposed at the retracted position when the stopper is located at the entering position. Steam displacement deaeration device, characterized in that it prevents movement from 6. The steam replacement deaerator according to claim 5, wherein the stopper is configured to move between a retracted position set relatively below and an approach position set relatively above, The stopper is connected to the lift drive source and is attached to a lift shaft that can freely move up and down, and the stopper prevents the lift shaft from descending when positioned at the entry position, thereby lowering the nozzle from the retracted position downward. A steam replacement deaeration device, characterized in that it prevents movement. 5. The steam replacement deaeration device according to claim 4, wherein the steam replacement deaeration device further includes a second lift drive source attached to a lift member of the first lift drive source, and the steam blowing nozzle is The steam raising nozzle is connected to the second raising / lowering driving source and the first raising / lowering driving source is activated when the second raising / lowering driving source is not activated, and the steam blowing nozzle has the standby position and the lower end position. When the second raising / lowering driving source is operating, the first raising / lowering driving source is activated and the steam blowing nozzle is raised / lowered between the retracted position and the discarding position. The steam replacement deaerator is characterized in that the control device controls the second lifting drive source based on a signal from the detection device. The steam replacement degassing apparatus according to any one of claims 4 to 7, wherein a waste pipe is connected to a bottom portion of the steam receiving container.

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