JP2016074460A - Deaeration device in bag on mouth part sealer of bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deaeration device in a bag on a mouth part sealer of the bag which expands a mouth part of the bag held by a vertical holding belt and conveyed to the seal means side such that the mouth part has a fixed opening area on this side of the seal means, concentrates a deaeration force into the mouth part of the bag through the opening part and smoothly and efficiently deaerates the interior of the bag.SOLUTION: Passage ways 7 of holding belts 2, 3 which narrow gate ways 7a, 7b for causing the holding belts 2, 3 to pass therethrough and expand upper and lower opposed surfaces in the vertical direction from the gate ways 7a, 7b are formed between the upper and lower opposed surfaces of upper and lower suction boxes 12, 13 causing a mouth part of a bag held by the vertical holding belts 2, 3, a suction force is actuated to the interior of the passages 7 from the vertical direction, thereby, the mouth part B1 of the bag B during passage through the passage way 7 is expanded in the vertical direction within the passage way 7 with the gate ways 7a, 7b as fulcrum and an inner part of the bag is deaerated through the interior of the expanded mouth part B1.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a deaeration device in a bag that performs deaeration in the bag before sealing the bag in a sealing machine that automatically seals the mouth of the bag containing articles such as food.

  Conventionally, in a sealing machine that seals the mouth of the bag after storing the article in a flat bag, in order to prevent the article from being altered by air in the bag, In order to prevent the bag from becoming bulky, a device for degassing the inside of the bag is provided, and the bag mouth is sealed after the bag is degassed.

  As such a deaeration device in a bag, for example, as described in Patent Document 1 or Patent Document 2, a pair of upper and lower clamping belts that clamp the mouth portion of the bag and feed it to the sealing device side are running. In addition, a pair of upper and lower suction boxes whose opposing surfaces are parallel to each other are arranged so as to sandwich the belt portion that sandwiches the mouth portion of the bag in these sandwiching belts, and between the opposing surfaces of these upper and lower suction boxes is a passage of the sandwiching belt There is known a deaeration device which is formed and has a suction hole on its opposite surface, and faces the inlet port of the intake pipe toward the passage between the upper and lower suction boxes through which the clamping belt passes. Yes.

  According to this deaeration device, a bag containing articles is fed into the sealing machine from the conveyance start end side of the sealing machine, the mouth of the bag is inserted between the opposing surfaces of the upper and lower clamping belts, and the vertical suction box is moved according to the running of the clamping belt The upper and lower clamping belts are sucked toward the opposite surfaces of the upper and lower suction boxes by the suction force from the suction holes of the upper and lower suction boxes while passing through this passage, and the holding surfaces are separated in the vertical direction. The bag mouth is also widened in the vertical direction while being in close contact with the opposing surfaces of the upper and lower clamping belts, and the inside of the bag can be deaerated by the air suction action from the intake port of the intake pipe facing the opening. it can.

Japanese Utility Model Publication No. 1-444408 JP-A-6-278720

  According to the deaeration device described above, deaeration can be performed while holding the mouth of the bag at a certain opening degree by the suction force from the suction holes of the upper and lower suction boxes, but the opposing surfaces of the upper and lower suction boxes are parallel to each other. Thus, the passage formed between these opposing surfaces extends over the entire length from the entrance provided on one side end portion of this passage into which the clamping belt enters to the exit provided on the other end portion side. Therefore, the doorway has a large opening toward the traveling path of the holding belt with the same vertical opening width as the vertical width of the passage.

  For this reason, when an intake force is generated in the passage from the tip intake port of the intake pipe, the exhaust force also works outside through the entrance and exits into the mouth of the bag that is opened by the intake force from the suction hole of the suction box. The intake force from the intake pipe cannot be concentrated, the deaeration force in the bag is weakened, the flow of air sucked from the bag to the intake pipe side becomes slow, and it is pinched by the holding belt There is a problem in that the amount of deaeration from the bag passing through the bag becomes insufficient and air remains in the bag.

  Further, when the upper and lower clamping belts traveling in the passage between the opposing surfaces of the upper and lower suction boxes are separated by the suction force from the suction holes of the upper and lower suction boxes and are expanded until they are in sliding contact with the opposing surfaces of the upper and lower suction boxes, respectively. In addition, the bag mouth is also expanded together with the upper and lower clamping belts with the front and back outer surfaces of the mouth being in close contact with the opposing surfaces of the upper and lower clamping belts. As described above, since the opening is large with the same vertical width as the vertical width of the middle part of the passage, it is possible to regulate the expansion of the mouth portion of the bag toward the entrance / exit side of the passage by the suction force from the suction hole. However, there is a problem in that the expansion of the bag changes, the opening area of the bag changes, and the deaeration action becomes unstable.

  The present invention has been made in view of such problems, and the object of the present invention is to always maintain a constant opening degree before the bag mouth held by a pair of upper and lower clamping belts is sent to the sealing means. An object of the present invention is to provide a degassing device for a bag in a bag mouth sealing machine that can degas the bag smoothly and efficiently by concentrating the degassing force in the bag mouth while being held.

  In order to achieve the above object, the bag deaerator in the bag mouth sealing machine according to the present invention has a bag mouth sandwiched between a pair of upper and lower clamping belts as described in claim 1. In a sealing machine provided with a sealing device for sealing a mouth portion, a passage through which a sandwiching belt passes is formed between upper and lower opposing surfaces during traveling of the sandwiching belt traveling toward the sealing device, and the upper and lower opposing surfaces thereof The upper and lower suction boxes each provided with an upper and lower suction opening that opens toward the passage are disposed, and the intake air at the tip of the intake pipe is directed toward the mouth portion of the bag that is sandwiched by the sandwiching belt and passes through the passage. Furthermore, the upper and lower opening widths at both end portions of the passage are narrowed and formed at the entrance / exit of the sandwich belt, and the sandwich belt passing through the passage is connected to the suction port of the upper / lower suction box. Characterized in that it is configured to spread apart in the vertical direction the entrance as a fulcrum together with the mouth portion of the bag by energy.

  In the bag deaerator in the bag mouth sealing machine configured as described above, the invention according to claim 2 is that the suction ports provided on the opposing surfaces of the upper and lower suction boxes have the same size and the same shape. The other half of one suction port and the other half of the other suction port are overlapped with a sandwich belt sandwiching the mouth of the bag, and the other suction port is centered on the overlapping suction port. The half portion and one half portion of the other suction port are shifted from each other in the length direction of the holding belt.

  According to a third aspect of the present invention, a main suction box is integrally provided on the rear surface of the upper and lower suction box, and a vent hole communicating with the upper and lower suction box is provided on the upper and lower portions of the front surface of the main suction box. A deaeration port facing the passage formed between the opposing surfaces of the upper and lower suction boxes is drilled in the center of the front of the box, and the tip of the intake pipe is opened at the center of the rear surface of the main suction box. It is characterized by.

  Further, the invention according to claim 4 is a plane formed on the front surface of the upper and lower suction box so that the front and rear width reaches the vicinity of the article stored in the bag sandwiched by the sandwich belt from the front surface of the upper and lower suction box. A degassing guide consisting of a pair of upper and lower degassing guide pieces in a rectangular shape is detachably mounted, and communicates with a passage between the facing surfaces of the upper and lower suction boxes between the facing surfaces of the pair of upper and lower degassing guiding pieces. A degassing guide passage is formed, and a bag guide inlet / outlet having a narrow vertical width through which the bag can pass is formed between opposing surfaces of both side ends of the degassing guide piece.

  In the invention according to claim 5, a plate-like magnet piece is fixed to the front surface of the upper and lower suction box, and a metal piece to be magnetized to the magnet piece is attached to the rear end face of the pair of upper and lower deaeration guide pieces. And a positioning piece for attaching the deaeration guide piece to a predetermined position on the front surface of the upper and lower intake box by contacting the end surface of the metal piece to the front surface of the upper and lower intake box. .

  In the invention according to claim 6, a bag mouth positioning plate that receives the mouth end face of the bag and guides the bag to the pair of upper and lower clamping belts is provided on the bag feeding side with respect to the sealing machine. It is characterized by.

  According to the first aspect of the present invention, the pair of upper and lower sandwiching belts sandwiching the mouth portion of the bag passes through the passage between the opposing surfaces of the suction box disposed facing each other in the vertical direction. With the suction force from the suction port provided on the opposing surface, it can be opened with the mouth of the bag apart from each other in the vertical direction, and from the tip suction port of the suction pipe facing the passage through this opening. The inside of the bag can be deaerated by the suction force.

  At this time, the upper and lower opening widths of the entrance and exit of the holding belt formed at both end portions of the passage are narrowed in the vertical direction so that the opposing surface becomes the guide surface of the holding belt that holds the mouth of the bag. Since the width of the opening is narrower than the vertical opening width on the center side of the passage, the entrance / exit of the passage is supported by the suction force from the suction port of the upper / lower suction box when the holding belt that holds the bag mouth passes through this passage. As shown in FIG. It is formed in a degassing opening having a constant opening area in the shape of a tapered long hole, and the bag mouth while passing through the passage always maintains a certain opening area consisting of this degassing opening. The air can be deaerated quantitatively and smoothly. Can.

  Further, since the entrance / exit of the sandwiching belt in the passage is narrowed, the intake force from the intake pipe facing the passage toward the mouth end side of the mouth of the bag sandwiched by the sandwiching belt is reduced. It can be made to act intensively in the mouth part of the bag opened in the above-mentioned shape while preventing it from acting outside by the doorway, generating a strong deaeration force in the mouth part of the bag, and Increase the flow rate, and in combination with the bag mouth holding a constant opening area as described above, the bag mouth smoothly and reliably deaerates the air in the bag while passing through the passage. Can do.

  According to the second aspect of the present invention, the suction ports provided on the opposing surfaces of the upper and lower suction boxes are formed in the same size and shape, and one half of one suction port and the other half of the other suction port. With the sandwiching belt that sandwiches the mouth of the bag, the other half of one suction port and the other half of the other suction port with the overlapping suction port in the middle Since they are shifted from each other in the vertical direction, the suction force that acts on the upper holding belt and the upper surface of the mouth of the bag from the upper suction port, and the suction that acts on the lower holding belt and the lower surface of the mouth of the bag from the lower suction port It is possible to cause the mouth to act on a portion shifted in the length direction of the sandwiching belt, that is, the width direction of the mouth of the bag, and therefore the mouth of the bag that is in contact is smoothly and reliably opened. The intake port of the intake pipe that faces the passage while holding this opening It is possible to perform deaeration of the bag efficiently and reliably by the intake of et.

  According to the invention of claim 3, a main suction box is integrally provided on the rear surface of the upper and lower suction box, and a vent hole communicating with the upper and lower suction box is provided in the upper and lower portions of the front surface of the main suction box. A deaeration port facing the passage formed between the opposing surfaces of the upper and lower suction boxes is formed in the center of the front surface of the main suction box, and the front intake port of the intake pipe is opened in the center of the rear surface. Because of the intake force from the intake port at the tip of the intake pipe, the intake force going from the lower side to the upper side in the upper suction box through the inside of the main suction box, and the intake force going from the upper side to the lower side in the lower suction box, respectively. The suction force provided on the opposing surfaces of these upper and lower suction boxes can surely generate an intake force for expanding the mouth of the bag together with the clamping belt in the vertical direction, Deaeration in the bag from the mouth portion of the bag passing through the passage by the action of suction force from the suction pipe to the degassing port that is formed in the front center of the box can be smoothly carried out.

  According to the invention of claim 4, the front and rear widths are formed on the front surface of the upper and lower suction box so that the front and rear width reaches the vicinity of the article stored in the bag sandwiched by the sandwich belt from the front surface of the upper and lower suction box, and A deaeration inducing tool comprising a pair of upper and lower deaeration guide pieces in a rectangular plane that forms a deaeration guide passage communicating with the passage between the opposing surfaces of the upper and lower intake boxes between the opposing surfaces is detachably mounted. When the article is stored in the bag, the unstored part of the article changes depending on the quantity, size, shape, etc. of the article, and when the unstored part becomes large, the article is stored from the mouth end of the bag. The opening end of the deaeration guide passage is inserted into the bag by attaching a deaeration guide having a front and rear width that reaches the storage position of the article to the front of the upper and lower intake boxes. Match the items stored in Can be positioned so on purpose made, it can be an article in the bag the passage of the clamping belt between the opposed surfaces of the upper and lower air intake box through the degassing induction passage communicates to a position accommodated.

  Further, both end portions of the deaeration guide passage communicating with the entrance / exit of the passage of the sandwiching belt are formed as a bag guide entrance / exit having a narrow vertical width through which the mouth portion in close contact with the flat shape of the bag can be passed. Therefore, the upper end of the trunk of the bag that is passing through the deaeration guide passage is sandwiched by opening and closing in the vertical direction using the bag guide entrance as a fulcrum in the same manner as the mouth of the bag passing through the passage of the holding belt. It can be formed in a deaeration passage having a constant opening area that is substantially the same size and the same shape as the belt passage, and the intake force from the intake pipe facing the passage of the sandwiching belt is drawn from this passage of the sandwiching belt. It can be made to act intensively on the position of the article stored in the bag through the deaeration passage, and air is passed into the bag while passing through the passage from the mouth of the bag to the upper end of the trunk. Degas the bag efficiently and smoothly with almost no residual Rukoto can.

  According to the invention which concerns on Claim 5, while fixing the plate-shaped magnet piece to the front surface of an up-and-down attraction box, the metal piece magnetized by the said magnet piece is attached to the rear end surface of a pair of upper and lower deaeration induction pieces Therefore, a pair of upper and lower deaeration guide pieces can be attached to the front surface of the upper and lower intake boxes with a single touch, and the end face of the metal piece is brought into contact with the front surface of the upper and lower intake boxes. Since a positioning piece for mounting the guide piece at a predetermined position on the front surface of the upper and lower intake box is provided, the deaeration guide passage formed between the opposing surfaces of the upper and lower degassing guide pieces is provided between the opposing surfaces of the upper and lower intake boxes. It is possible to communicate easily and accurately with the passage of the sandwiching belt.

  According to the invention of claim 6, the bag mouth positioning plate for receiving the mouth end face of the bag and guiding the bag to the pair of upper and lower clamping belts is provided on the bag feeding side with respect to the sealing machine. Therefore, the position of the mouth portion of the bag held by the holding belt can be set to a predetermined position, and the deaeration by the deaeration device and the heat fusion of the mouth portion by the sealing device are accurately performed. Can do.

The simplified perspective view of the whole sealing machine provided with the deaeration apparatus. FIG. 3 is a partially cutaway perspective view showing a passage of a clamping belt formed between opposing surfaces of upper and lower intake boxes constituting a part of the deaeration device. The vertical side view of a deaeration apparatus. The vertical side view of the state which has deaerated the inside of a bag. The longitudinal cross-sectional front view which shows the opening part of the bag opening part in the channel | path part of the clamping belt. The simplified perspective view of the whole sealing machine which equipped the deaeration apparatus with the deaeration induction tool. The front view of the deaeration apparatus part which carried out the cross section of the channel | path part of a clamping belt. The perspective view of an up-and-down intake box and a deaeration guide. The vertical side view of the deaeration apparatus part equipped with the deaeration guide. The perspective view of the state which has sent the opening | mouth part of the bag into the deaeration apparatus. The vertical side view of the state which has deaerated the inside of a bag. FIG. The longitudinal cross-sectional front view which shows the opening part opening state of the bag in the channel | path part of a clamping belt. The longitudinal cross-sectional front view which shows the expansion state of the trunk | drum upper part of the bag in a deaeration guide. The longitudinal cross-sectional side view of the state which equips the upper and lower intake box with the deaeration induction tool with a wide front and back width, and deaerates the inside of a bag.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, the thickness is about 0.8 mm along the front surface of the machine base 1 and between both end portions of the machine base 1. A pair of upper and lower sandwiching belts 2 and 3 made of steel or glass fiber are disposed, close to these sandwiching belts 2 and 3, and parallel to the sandwiching belts 2 and 3 in front of the machine base 1. A conveyor 4 comprising a belt conveyor that travels horizontally from one side end to the other end of the machine base 1 is disposed, and further, a machine base 1 that is a conveyance start end side of the bag by the sandwiching belts 2 and 3. A deaerator A for opening the mouth of the bag B sandwiched by the sandwiching belts 2 and 3 to deaerate the inside of the bag is disposed on the front surface of the one side end. Further, a sealing device 5 comprising a pair of upper and lower heaters 5a and 5b for sealing the mouth of the bag B deaerated along the traveling direction of the sandwich belts 2 and 3 from the deaeration device A, and a cooling device 6 are provided. They are sequentially arranged on the front surface of the machine base 1.

  Note that, as is well known, the bag B has a rectangular or rectangular front and back sheet b1, b2 overlapped so that both long side edges and one short side opposite edge are integrally connected. After the article C is stored in the bag B, it is placed on the transport conveyor 4 with either the front or back sheet, for example, the front-side sheet b1 facing upward. It is configured to be conveyed to the sealing device 5 side while being held between the holding belts 2 and 3.

  As shown in FIGS. 2 and 3, the deaerator A includes a hollow main suction box 11 fixed to the front surface at one end of the machine base 1, and an upper half portion of the front surface of the main suction box 11. The upper and lower suction boxes 12 and 13 are provided with a pair of upper and lower rectangular suction boxes 12 and 13 provided integrally with the lower half, and the opposite surfaces of the upper and lower suction boxes 12 and 13, that is, the lower surface and the lower suction of the upper suction box 12 Between the upper surface of the box 13, a passage having an upper and lower interval of about 7 mm for passing the belt portions 2a and 3a that overlap each other in the holding belts 2 and 3 holding the mouth B1 of the bag B in the horizontal direction. 7 and the upper and lower opposing surfaces of both end portions of the passage 7 which become the entrances 7a and 7b of the sandwiching belts 2 and 3 are narrowed in the direction approaching each other, and the vertical opening width of the entrances 7a and 7b is reduced. The holding belts 2 and 3 holding the mouth B1 of the bag B are connected to the entrances 7a and 7b. While sliding in contact with the facing surfaces, or to form a narrow opening width can pass while through a slight gap.

  Further, suction ports 14 and 15 having the same size and the same shape communicating with the passage 7 are formed in front portions of the opposing surfaces of the upper and lower suction boxes 12 and 13, respectively. The width in the front-rear direction of these suction ports 14 and 15, that is, the width corresponding to the width direction of the sandwiching belts 2 and 3, is formed to be substantially the same width as the sandwiching belts 2 and 3. Are formed in planar rectangular inlets 14 and 15 which are longer than the width in the front-rear direction. These suction ports 14 and 15 are connected to the clamping belts 2 and 3 as shown in FIG. A state in which one half of the upper intake port 14 and the other half of the lower intake port 15 that are shifted in the length direction of the holding belts 2 and 3 are overlapped with the holding belts 2 and 3 therebetween. Is arranged.

  Further, as shown in FIG. 3, the rear half of the upper and lower intake ports 14 and 15 in the front-rear width direction is opened toward the front half of the upper and lower clamping belts 2 and 3 and the front half is exposed from the clamping belts 2 and 3. The bag B is configured to open toward the mouth B1 of the bag B.

  The passage 7 may be formed by the bottom plate of the upper suction box 12 and the top plate of the lower suction box 13 that form the opposing surfaces of the upper and lower suction boxes 12, 13, but in this embodiment, A pair of upper and lower passage forming pieces 17a and 17b made of a rectangular metal plate having a width approximately twice the width of the sandwiching belts 2 and 3 and long in the length direction of the sandwiching belts 2 and 3 are connected to the upper and lower suction boxes 12, The passage 7 is formed between the opposing surfaces of the passage-forming pieces 17a and 17b, which are fixed to the opposing surfaces of the passage 13, and both end portions in the longitudinal direction of the passage-forming pieces 17a and 17b which are vertically opposed to each other. Are bent in a V-shape in a direction approaching each other, thereby forming the above-described entrances 7a and 7b whose narrower opening width is narrower than the passage width, and further, the bottom plate and the upper passage of the upper suction box 12 overlapping each other The upper suction port 14 is connected to the formed piece 17a. The top plate and the lower passage forming member 17b and the lower suction opening 15 to the lower suction box 13 are respectively bored.

  In addition, by extending one end portion in the length direction of the upper and lower passage-forming pieces 17a and 17b and refracting the extended portion in a direction away from each other, the guide port expanded in a trumpet shape communicating with the passage 7 Formed in 16.

  On the other hand, the upper and lower portions of the front surface of the main suction box 11 are respectively provided with vent holes 18a and 18b communicating with the upper and lower suction boxes 12 and 13, respectively, as shown in FIG. A deaeration port 8 facing the rear end side opening of the passage 7 formed between the opposed surfaces of the upper and lower suction boxes 12 and 13 is formed in the center, and further, the main suction box 11 is provided with an intake port 9 at the center of the rear surface, and an exhaust pipe 10 is connected to an exhaust blower 19 installed below the machine base 1, and the tip of the intake pipe 10 is connected to the intake port 9. As a result of the operation, exhaust power is generated in the main intake box 11 through the intake pipe 10. The deaeration port 8 has an upper and lower opening width equal to the upper and lower opening width of the passage 7 and a horizontal width substantially equal to the width between both side ends of the passage 7. Is formed.

  As shown in FIG. 1, the pair of upper and lower clamping belts 2 and 3 are endlessly formed between drive pulleys 20 and 21 and driven pulleys 22 and 23 that are rotatably supported at both end portions on the front surface of the machine base 1. One side end side of the machine base 1 with the belt portions 2a and 3a being superposed and in close contact with each other by rotating the drive pulleys 20 and 21 by a drive motor (not shown). It is made to travel horizontally from the bag conveyance start end side toward the bag conveyance termination side on the other end side of the machine base 1, and the passage 7, the sealing means 5, and the cooling means 6 of the deaeration device A provided in the course of traveling are provided. It is configured to pass through sequentially. Further, the conveyor 4 disposed in front of the sandwiching belts 2 and 3 is also stretched endlessly between the driving pulley 24 and the driven pulley 25, and is attached to the belt portions 2a and 3a of the sandwiching belts 2 and 3. In parallel, the belts 2a and 3a are configured to travel in the same direction at the same speed.

  In the figure, reference numeral 26 denotes an elongated positioning plate having an L-shaped cross section disposed on the feeding side of the bag B which is one end side of the machine base 1, and the mouth end of the mouth B1 of the bag B is perpendicular to the mouth. The bag B is received by the surface and guided between the pair of upper and lower suction ports 14, 15, the end surface of the mouth is slidably contacted with the front surface of the main suction box 11, and the air is sucked from the suction ports 14, 15 in the passage 7. As shown in FIG. 4, the opening end of the opening B1 that is expanded is configured to directly communicate with the deaeration port 8 entirely.

  The operation of the deaeration device in the bag in the bag mouth sealing machine constructed in this way will be described. The machine is operated at the same conveying speed by operating the sealing machine and the pair of upper and lower clamping belts 2 and 3 at the same conveying speed. The bag which is made to travel from one side end side to the other side end side and operates the exhaust blower 19 in this state, and stores the article C inside the transfer start end of the transfer conveyor 4 in this state. B is placed in a state where the mouth end of the mouth part B1 is in contact with the vertical surface of the positioning plate 26.

  The bag B placed on the conveyor 2 is sent to the upper and lower clamping belts 2 and 3 side with its mouth end in sliding contact with the vertical surface of the positioning plate 26, and the mouth part overlaps with the sandwiching belts 2 and 3. It is sandwiched between the upper and lower belt portions 2 a and 3 a and introduced into the passage 7 through the guide port 16.

  On the other hand, in the main suction box 11 of the deaeration device A, exhaust force is generated through the intake pipe 10 by the operation of the exhaust blower 19, and this exhaust force is drilled in the upper and lower parts of the front surface of the main suction box 11. The suction ports 14 and 15 provided on the opposing surfaces of the upper and lower suction boxes 12 and 13 generate an intake force while acting in the upper and lower suction boxes 12 and 13 through the vent holes 18a and 18b. Due to the generated exhaust force, a deaeration action is generated in the passage 7 through the deaeration port 8 provided at the front center portion of the main suction box 11.

  The belts of the holding belts 2 and 3 holding the mouth B1 of the bag B passing through the passage 7 by the suction force from the suction ports 14 and 15 provided on the opposing surfaces of the upper and lower suction boxes 12 and 13. The parts 2a and 3a are pulled up and down as shown in FIG. 5 with the narrowed entrances 7a and 7b at both ends of the passage 7 together with the mouth part B1 of the bag B.

  At this time, the suction ports 14 and 15 provided on the opposing surfaces of the upper and lower suction boxes 12 and 13 are shifted from each other in the length direction of the sandwich belts 2 and 3 so that a part of them is overlapped when viewed from the plane. The suction force that acts on the belt portion 2a of the upper clamping belt 2 by the suction force from the upper suction port 14 and the suction force that acts on the belt portion 3a of the lower clamping belt 3 by the suction force from the lower suction port 15 The belt portions 2a and 3a of the upper and lower clamping belts 2 and 3 can be reliably separated in the vertical direction together with the mouth portion B1 of the bag B by acting on the positions shifted in the length direction of 2 and 3.

  Thus, when the belt portions 2a and 3a of the holding belts 2 and 3 are pulled up and down by the suction force from the upper and lower suction ports 14 and 15, the upper belt portion 2a is gradually inclined upward from the entrances 7a and 7b. The lower belt portion 3a is gradually moved from the entrances 7a and 7b while being in sliding contact with the entire lower surface of the flat upper wall surface of the passage 7 along the lower surface of the upper wall surface (upper passage forming piece 17a) at both ends of the passage 7. A bag that slidably contacts the entire upper surface of the flat lower wall surface of the passage 7 along the upper surface of the lower wall surface (lower passage forming piece 17a) at both end portions of the passage 7 inclined downward, and passes through the passage 7. B opening B1 is sandwiched between clamping belts 2 and 3 at the entrances 7a and 7b of passage 7, and the front and back sheets b1 and b2 are in close contact with each other. It becomes a state.

  Accordingly, the deaeration port 8 of the main suction box 11 faces the opening end of the mouth B1 of the bag B that is open with both ends closed in the passage 7 in this way, The intake portion acting on the opening B1 of the bag B through the deaeration opening 8 from the intake pipe 10 is prevented from acting on the outside of the opening of the bag B by the closed portions overlapping on the entrances 7a and 7b. The mouth B1 of the bag B passes through the passage 7 while acting intensively in the opening and generating a strong deaeration force in the mouth B1 of the bag B to increase the flow rate of air from the inside of the bag. The air in the bag B can be smoothly and reliably deaerated inside.

  Thus, when the inside of the bag B is evacuated while the mouth portion B1 is expanded while passing through the passage 7, and the mouth portion B1 of the bag B passes through the passage 7, the mouth portion B1 becomes the upper and lower clamping belt 2 again. 3 is sandwiched by 3 and closed, sent from the degassing device A to the sealing device 5, sealed by the upper and lower sealing heaters 5 a and 5 b, and then cooled by the cooling device 7, and the conveyance terminal portion of the conveyor 4 It is carried out from.

  Next, when the article C is stored in the bag B, the uncontained portion of the article C in the bag changes depending on the amount, size, shape, etc. of the article C. If an unaccommodated portion of the article C is also generated in the upper part B2 connected to the mouth B1 of the bag B and the unaccommodated upper part B2 protruding forward from the passage 7 is long, the deaerator A When the inside of the bag B is evacuated, the upper part B2 of the body C where the article C does not exist protrudes forward from the front end surface where the passage 7 is opened, and the suction force of the upper and lower suction ports 14 and 15 in the passage 7 Even if the mouth portion B1 of the bag B is opened by this, the deaeration port acting in the bag through this opening portion acts so as to diffuse from the inside of the trunk B2 of the bag B in the width direction of the bag B. As the deaeration force against the air becomes weaker, the front and back sheets b1 and b2 of the upper trunk B2 become narrower in the direction in which they are in close contact with each other, and smooth deaeration cannot be performed.

  In order to eliminate the occurrence of such a situation, as shown in FIG. 6 to FIG. 9, the deaerator A in the bag mouth sealing machine configured as described above, the mouth B 1 of the bag B A degassing induction tool 30 for degassing the upper trunk B2 is attached.

  The deaeration guide 30 is composed of a pair of flat rectangular upper and lower deaeration guide pieces 30a and 30b whose rear end surfaces are detachably attached to the front surfaces of the upper and lower suction boxes 12 and 13 in the deaeration device A. When mounted on the front surface of 12, 13, the front end surface protruding from the upper and lower suction boxes 12, 13 is arranged so that it reaches the vicinity of the stored article in the bag B with the mouth B1 sandwiched by the sandwiching belt. A width is set, and a deaeration guide passage 31 is formed between the opposing surfaces of the upper and lower deaeration guide pieces 30a and 30b.

  The opposing surfaces of the pair of upper and lower deaeration guide pieces 30a, 30b are formed in substantially the same shape as the opposing surfaces of the pair of upper and lower passage forming pieces 17a, 17b forming the passage 7 of the sandwich belts 2, 3. Yes. That is, the opposing surfaces are formed in parallel with each other except for the end portions on both sides, and the opposing surfaces are gradually inclined in a direction approaching each other from the parallel surfaces toward the both end portions, and the opposing surfaces on the both end portions are formed. The bag guide entrances 32a and 32b are formed in parallel with each other so that the upper and lower widths through which the upper part B2 of the bag B can pass are formed between these opposing surfaces.

  A pair of upper and lower deaeration guide pieces 30a and 30b are provided on the front surface of the upper and lower suction boxes 12 and 13, and a deaeration guide passage formed between the opposing surfaces in the passage 7 between the opposing surfaces of the upper and lower suction boxes 12 and 13 When installed so that 31 communicates, the vertical opening width of the deaeration guide passage 31 is the same width as the vertical opening width of the passage 7 between the opposing surfaces of the vertical suction boxes 12, 13 or the thickness of the clamping belts 2, 3. The bag guide inlet / outlet 32a communicating with the inlet / outlet 7a, 7b formed at both side ends of the passage 7 between the opposing surfaces of the upper / lower suction boxes 12, 13; 32b is formed to be narrower than the entrances 7a, 7b of the passage 7 by the same width as the width between the upper and lower opposing surfaces of the entrances 7a, 7b or the thickness of the sandwich belts 2, 3.

  Further, one side end portion in the length direction of the pair of upper and lower deaeration guide pieces 30a, 30b is further extended, and the opposite surface of the extension portion is set as one side end portion in the length direction of the passage forming pieces 17a, 17b. In the same way as the guide port 16 formed on the bag B, the bag B is expanded toward the feeding side of the bag B and formed in the guide port 33 of the bag B. The pair of upper and lower degassing guide pieces 30a and 30b are connected to the upper and lower suction boxes 12, When mounted on the front surface of 13, the guide port 33 overlaps the front side of the guide port 16 of the passage.

  The pair of deaeration guide pieces 30a and 30b may be attached to the front surfaces of the upper and lower suction boxes 12 and 13 by screws or the like, but in this embodiment, the magnet pieces and the metal plates can be attached and detached with one touch. It is configured to be possible.

  That is, as shown in FIGS. 7 to 10, horizontally long rectangular plate-like magnet pieces 34a and 34b are fixed to the opposing surfaces sandwiching the opening ends of the passages 7 on the front surfaces of a pair of upper and lower suction boxes. On the rear end surfaces of the pair of deaeration guide pieces 30a and 30b, horizontally long rectangular metal pieces 35a and 35b that are detachably attached to the magnet pieces 34a and 34b are respectively attached. The metal piece 35a attached to the rear end protrudes upward from the upper surface of the deaeration guide piece 30a to form a wide U-shaped engaging recess 36a opening upward on the protruding end face. A metal piece 35b attached to the rear end of the deaeration guide piece 30b is protruded downward from the lower surface of the deaeration guide piece 30b to form a wide U-shaped engagement recess 36b opened downward on the protruding end face. Yes.

  Further, a horizontally-long rectangular upper positioning piece 37a is fixed to the front surface of the upper suction box 12 so that the lower end surface thereof is in contact with the upper end surface of the magnet piece 34a fixed to the front surface of the upper suction box 12. Similarly, the lower rectangular positioning piece 37b is attached to the front surface of the lower suction box 13 so that the upper end surface is in contact with the lower end surface of the magnet piece 34b fixed to the front surface of the lower suction box 13. It is stuck to.

  The horizontal widths of these vertical positioning pieces 37a and 37b are made equal to the opening widths of the engaging recesses 36a and 36b provided on the protruding end surfaces of the metal pieces 35a and 35b attached to the rear end surfaces of the vertical deaeration guiding pieces 30a and 30b. Thus, the engagement recess 36a of the upper metal piece 35a is fitted to the lower half of the upper positioning piece 37a, and the engagement recess 36b of the lower metal piece 35b is fitted to the upper half of the lower positioning piece 37b. The upper and lower deaeration guide pieces 30a and 30b are configured so that the deaeration guide passage 31 between the opposing surfaces thereof accurately communicates with the passage 7 formed between the opposing surfaces of the upper and lower suction boxes 12 and 13. .

  As the deaeration guide 30 comprising the pair of upper and lower deaeration guide pieces 30a and 30b, a plurality of deaeration guides having different front and rear widths are prepared, and the amount and size of the article C stored in the bag B are prepared. As shown in FIGS. 6 to 9, the deaeration guide 30 having a front-rear width corresponding to the length of the upper part B2 of the bag B of the bag B in the unaccommodated portion of the article C generated by the shape or the like is selected. The metal pieces 35a and 35b attached to the rear ends of the upper and lower deaeration guide pieces 30a and 30b of the guide tool 30 are magnetically attached to the magnet pieces 34a and 34b fixed to the front surfaces of the upper and lower suction boxes 12 and 13, respectively.

  At this time, the upper end engaging recess 36a of the metal piece 35a attached to the rear end surface of the upper deaeration guide piece 30a is brought into contact with the lower half of the upper positioning piece 37a fixed to the front surface of the upper suction box 12. The lower half engagement piece 36b of the metal piece 35b attached to the rear end face of the lower deaeration guide piece 30b is fixed to the front surface of the lower suction box 13 and the upper half of the lower positioning piece 37b. The deaeration guide passage 31 formed between the opposing surfaces of the upper and lower degassing guide pieces 30a and 30b is formed between the opposing surfaces of the upper and lower suction boxes 12 and 13 by being fitted to each other. It is possible to accurately communicate with the existing passage 7.

  Thus, the upper and lower degassing guide pieces 30a and 30b are arranged so that the degassing guide passage 31 communicates with the passage 7 formed between the opposing surfaces of the upper and lower suction boxes 12 and 13 on the front surface of the upper and lower suction boxes 12 and 13. After the degassing guide tool 30 is mounted, the sealing machine is operated, and the conveyor 4 and the pair of upper and lower clamping belts 2 and 3 are moved from one side end side to the other side end at the same transport speed. And the exhaust blower 19 is operated to position the bag B containing the article C therein on the transfer start end of the transfer conveyor 4 and to position the end of the mouth B1. When the belt 26 is placed in contact with the vertical surface of the plate 26 and fed to the upper and lower clamping belts 2 and 3 side, between the belt portions 2a and 3a of the clamping belts 2 and 3 where the mouth portions B1 of the bag B overlap each other And is conveyed to the deaerator A side, and the mouth B1 and the upper trunk B2 of the bag B are connected to the guide ports 16, 33, respectively. Through the mouth passage 7 and the deaeration guide passage 31.

  In the upper and lower suction boxes 12 and 13 of the deaeration device A, exhaust force is generated through the intake pipe 10, the main suction box 11, and the upper and lower ventilation holes 18a and 18b as described above by the operation of the exhaust blower 19. The exhaust force generates an intake force in the passage 7 at the suction ports 14 and 15 provided on the opposing surfaces of the suction boxes 12 and 13, and the main suction by the exhaust force generated in the main suction box 11. A deaeration action is generated in the passage 7 through a deaeration port 8 provided in the front center portion of the box 11.

  The belt portions 2a of the sandwiching belts 2 and 3 that sandwich the mouth B1 of the bag B passing through the passage 7 by the suction force from the suction ports 14 and 15 provided on the opposing surfaces of the upper and lower suction boxes 12 and 13. , 3a is pulled up and down as shown in FIG. 13 with the narrowed entrances 7a and 7b at both ends of the passage 7 together with the mouth B1 of the bag B. At this time, the suction ports 14 and 15 provided on the opposing surfaces of the upper and lower suction boxes 12 and 13 are shifted in the length direction of the sandwiching belts 2 and 3 with a part of them overlapped. As described above, the belt portions 2a and 3a of the upper and lower clamping belts 2 and 3 can be reliably pulled up and down together with the mouth portion B1 of the bag B by the suction force from these suction ports 14 and 15, and the upper clamping belt 2 The belt 2a is in contact with the lower surface of the upper wall surface of the passage 7 together with the front sheet b1 of the mouth B1 of the bag B that is in contact with the lower surface of the belt 2a. The passage B is in contact with the upper surface of the lower side wall surface of the passage 7 together with the back sheet b2 of the mouth portion B1 of the bag B in contact with the upper surface of the portion 3a, and the mouth B1 of the bag B is closed at the entrances 7a and 7b of the passage. 7 is expanded.

  In this way, the deaeration force from the deaeration port 8 provided at the center of the front surface of the main suction box 11 acts intensively in the mouth B1 of the bag B that is expanded along the passage 7, and is shown in FIG. As described above, the front end opening portion communicates with the passage 7 and is brought close to the article C stored in the bag B so as to come into contact with the article C and escapes through the upper portion B2 of the bag B in the degassing guide passage 31. The aerodynamic force acts in the bag B containing the article C.

  At this time, when the mouth B1 of the bag B is expanded in the vertical direction in the passage 7 by the suction force from the upper and lower suction ports 14 and 15, the rear end in the deaeration guide passage 31 communicating with the passage 7 is provided. The suction force of the upper and lower suction ports 14 and 15 also acts in the opening, and the upper end of the body of the bag B in at least the rear end in the deaeration guide passage 31 is expanded in the vertical direction.

  On the other hand, on the front end opening side of the deaeration guide passage 31, the front and back sheets b1 and b2 of the body of the bag B covering the article C facing the opening end are opened from the article C to the front end opening of the deaeration guide passage 31. It is in a state of being inserted while being gradually narrowed toward the inside of the part, and the deaeration guide passage 31 is caused by the air flow from the article storage side in the bag B generated during the deaeration toward the front end opening of the deaeration guide passage 31. The front and back sheets b1 and b2 of the trunk portion of the bag B inserted into the front end opening are expanded in the vertical direction, and the front side of the trunk upper portion B2 of the bag B in the deaeration guide passage 31 as well as in the passage 7 As shown in FIG. 14, the sheet b1 is in contact with the lower surface of the upper deaeration guide piece 30a, while the back sheet b2 of the trunk upper portion B2 of the bag B is in contact with the lower surface of the lower degassing guide piece 30b. On the side of 32b, it is expanded in the deaeration guide passage 31 so as to be closed, and the upper part B2 of the bag B is raised. Mouth B1 substantially university bag was expanded in passage 7 B, expanding the same shape cross-sectional shape.

  Accordingly, the intake force acting in the opening of the mouth B1 of the bag B from the intake pipe 10 through the deaeration port 8 hardly leaks out of the bag B, and the passage 7 and the deaeration guide passage 31 communicate with each other. It acts intensively on the storage space of the article C where the opening end of the deaeration guide passage 31 faces from the opening B1 of the opened bag B through the upper part B2 to generate a strong deaeration action. The air in the bag can be rapidly deaerated through the passages 7 and 31 by the deaeration force. Thus, when the mouth B1 of the deaerated bag B passes through the passage 7, the mouth B1 is again sandwiched by the upper and lower clamping belts 2 and 3 and is sent from the deaerator A to the seal device 5. After being sealed, it is cooled by the cooling device 7 and is carried out from the conveyance end portion of the conveyance conveyor 4.

  Next, a bag in which the width of the unstored part (the length from the opening end of the bag to the article storage part) differs depending on the amount or size of the article C stored therein, for example, the storage amount, etc. When the inside of the bag B ′ having a long length from the mouth opening end to the article storage position is degassed, as shown in FIG. 15, the front end of the deaeration guide passage 31 is stored in the bag B ′. It replaces with the deaeration induction tool 30 which consists of a pair of upper and lower deaeration induction pieces 30a, 30b having the front-rear width reaching the position of the bag B. The magnet pieces 34a and 24b fixed to the front surfaces of the upper and lower suction boxes 12 and 13 are attached to the rear ends of the deaeration guide pieces 30a and 30b so as to communicate with the passage 7 between the upper and lower opposing surfaces of the boxes 12 and 13. After the metal pieces 35a and 35b are attached by magnetizing, the bag is deaerated by the deaerator A. It is. Since other configurations and deaeration methods are the same as those in the above embodiment, detailed description thereof is omitted.

A Deaerator B Bag
B1 bag mouth
B2 Upper body of bag 2, 3 Upper and lower clamping belt 4 Conveyor 5 Sealing device 7 Passage
7a, 7b Entrance / Exit 8 Deaeration
10 Intake pipe
11 Main suction box
12, 13 Vertical suction box
14, 15 Upper and lower suction ports
26 Positioning plate
30 Deaeration guide
30a, 30b Deaeration guide piece
31 Deaeration guide passage
32a, 32b bag guide doorway
34a, 34b Magnet piece
35a, 35b metal pieces

Claims (6)

  In a sealing machine provided with a sealing device that seals the mouth portion of a bag while sandwiching the mouth portion of the bag with a pair of upper and lower sandwiching belts, the upper and lower opposing surfaces are sandwiched while the sandwiching belt traveling toward the sealing device is running An upper and lower suction box formed in a passage for allowing the belt to pass therethrough and provided with upper and lower suction ports opened toward the passage on the upper and lower opposing surfaces of the belt, and is sandwiched by the sandwiching belt and placed in the passage The air inlet end of the air intake pipe faces the mouth of the bag that passes through the bag. The sandwiching belt is configured to expand in the vertical direction with the mouth of the bag as a fulcrum together with the mouth of the bag by the suction force from the suction port of the vertical suction box. Degassing device in the bag in the mouth sealing machine.   A holding belt that forms suction ports provided on opposite surfaces of the upper and lower suction boxes in the same size and shape, and sandwiches one mouth portion of the suction port and the other half portion of the other suction port between the mouth portions of the bag And the other suction port portion and the other suction port half are shifted from each other in the length direction of the sandwich belt. The deaeration apparatus in a bag in the bag mouth sealing machine according to claim 1.   A main suction box is integrally provided on the rear surface of the upper and lower suction boxes, and a vent hole is provided in the upper and lower front portions of the main suction box so as to communicate with the upper and lower suction boxes. It has a deaeration port facing the passage formed between the opposing surfaces of the box, and a front intake port of the intake pipe is opened at the center of the rear surface of the main suction box The deaeration apparatus in a bag in the bag mouth sealing machine according to claim 1 or 2.   A pair of upper and lower deaeration guide pieces in the shape of a plane rectangle formed on the front surface of the upper and lower suction box so that the front and rear width reaches the vicinity of the article stored in the bag sandwiched by the sandwich belt from the front surface of the upper and lower suction box A deaeration guide path is formed between the opposed surfaces of the pair of upper and lower deaeration guide pieces and communicates with the passage between the opposed surfaces of the upper and lower suction boxes. The bag mouth sealing machine according to claim 1, wherein a bag guide inlet / outlet having a narrow vertical width through which the bag can pass is formed between opposing surfaces of both side end portions of the deaeration guide piece. Degassing device in the bag.   While a plate-like magnet piece is fixed to the front surface of the upper and lower suction box, a metal piece that is magnetically attached to the magnet piece is attached to the rear end surfaces of the pair of upper and lower deaeration guide pieces. 5. A positioning piece for mounting the deaeration guide piece at a predetermined position on the front face of the upper and lower intake boxes by bringing the end face of the metal piece into contact with the front face of the upper and lower intake boxes is provided. The deaeration apparatus in the bag in the bag mouth sealing machine according to the description.   The bag mouth positioning plate for receiving the mouth end face of the bag and guiding the bag to the pair of upper and lower clamping belts is disposed on the bag feeding side with respect to the sealing machine. The deaeration apparatus in the bag in the bag mouth sealing machine according to the description.

Images