JPH07100493B2 - Packaging equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a packaging apparatus for expanding a packaging bag with a pressure difference acting on the entire bag in order to fill an object to be packaged.

(Prior Art) Japanese Patent Application Laid-Open No. 63-162437 discloses this type of packaging device. The two walls face each other in the vertical direction at a fixed interval,
The bag is inserted between the two walls. Numerous suction holes are formed in each of the two walls, and by applying a vacuum suction force to each suction hole, the space between both walls becomes negative pressure,
The bag is pulled by negative pressure and adsorbs to both walls, and as a result, the bag is unfolded due to the separation of both walls.

(Problems to be Solved by the Invention) The device is said to have few opening mistakes in the bag because the bag is unfolded by the negative pressure acting on the majority of the surface of the bag, but both walls exist only under atmospheric environment. At the same time, a vacuum suction force is applied to the suction hole of the wall, and at the same time, the atmosphere is drawn between the two walls from above, which hinders the formation of a pressure difference. Especially when a bag having a large area is used, the gap between both walls is set to be large, so that there is a problem that a negative pressure enough to attract the bag cannot be formed.

(Means for Solving the Problem) In order to ensure that a pressure difference acts on the bag, the present invention supports a pair of flat support plates that are supported on the peripheral portion of the rotor and face each other in the longitudinal direction. Means for moving the rotor along a circular orbit by 1 pitch by intermittent rotation of the rotor, and a large number of suctions formed on both support plates by vacuum acting on a hollow chamber formed on the back surface of the both support plates. A means for applying a vacuum suction force to the hole and a vacuum suction force acting inside the bag inserted from the bag mouth to suck and move the bag to the bag and supply the bag between the support plates in the middle of the movement. A means, a means for advancing the support plates from both sides of the bag supplied by the cord, adsorbing the bags by suction holes of both support plates, and expanding and supporting the bag by separating the support plates; and a circular orbit. Unfolded during movement and supported by both support plates And a means for filling the drawn bag into the bag.

(Operation) When a pair of support plates that move intermittently on a circular orbit stop at a position where the bag is supplied, the bag adsorbed on the bag is supplied between both support plates, and both support plates face toward the bag. Approach from both sides. Then, the vacuum suction force acting on the suction holes of both support plates creates a negative pressure between the two support plates that are close to each other, so that a large pressure difference is formed between the inside and the outside of the bag. The bag inserted in the mouth of the bag serves to form a ventilation gap in the mouth of the bag, so that the bag is surely attracted to both of the supporting plates that are close to each other and is spread by the separating action of both supporting plates.

(Example) As shown in FIG. 1, a pipe type main shaft (103) is rotatably supported inside a bearing (102) fixed by a bolt nut (101) on an upper surface of a machine base (100), and the main shaft is rotated. A disc-shaped rotor (104) provided on the upper end of (103) has eight arms (10
5) are arranged radially, and box-shaped chambers (106) are fixed to the tips of the arms. A donut-shaped member (108) fixed on the flange (107) at the upper end of the bearing (102) and another donut-shaped member (109) fixed on the lower surface of the rotor (104) serve as a rotary valve ( 110), the driving shaft (111) arranged in the machine base and the lower end of the main shaft (103) are connected via the Genebus top (112), and the rotational power of the driving shaft (111) is generated by the Genebus top (112). By transmitting to the main shaft (103) with 112, the rotor (104) slides between the two members (108) (109) of the rotary valve and the chamber (106) ...
It can be rotated intermittently in 45 degree increments.

Figure 2 shows the detailed structure inside the chamber.
The chamber (106) has a lid (115) that can be opened and closed centered on the pin (114) in the upper opening and a pin (1) in the lower opening.
The bottom plates (117) that can be freely opened and closed are provided around the shaft (16). A length formed by forming a pin (120) protruding from an upper end side surface of a lever (119) supported by an arm (105) through a support shaft (118) on a piece (121) provided on the upper surface of the lid member (115). A ball type roller (123) rotatably supported on the lower end of the lever (119) is engaged with the hole (122) and a groove type cam (124). As shown in FIG. 1, since the cam (124) is fixed to the machine base (100) through the member (125), when the chamber (106) rotates integrally with the rotor (104), the ball type roller (123 ) Moves along the groove-shaped cam (124), the meandering of the cam (124) causes the lid member (115) to be released from the chamber (106) about the pin (114) only when necessary. . Further, as shown in FIG. 2, a pair of support plates (1
26) and (127) are arranged to face each other. As shown in FIG. 3, the support plates (126) and (127) are provided with 2 on each side.
Links (128) (129) are arranged for each book, and the support plates (126) (127) are supported by the chamber (106) via these links. That is, two crossing links (12
8) The central part of (129) is supported by the chamber (106) via the pivot (130), and each link (12) is supported as shown in FIG.
8) Slotted holes (131) (132) are formed at both ends of (129), and pins (133) (134) on the side surfaces of the support plates (126) (127) are engaged with these slotted holes. The support plates (126) (127) are supported by the links (128) (129), while the support plates (12) on one side are supported.
The rod (135) fixed to 6) is projected out of the chamber through the hole (137) at the center of the support block (136). As shown in FIG. 1, the roller (138) rotatably supported on the end of the rod (135) is engaged with the cam (140) fixed to the member (139), and the chamber (106) rotates the rotor (104). ), The rod (135) is pushed or pulled by the meandering of the cam (140). Therefore, in FIG. 2, the support plate (126) on one side is moved by the rod (135) to rotate the links (128) and (129) with the pivot shaft (130) as a support shaft. The support plate (127) is also moved. As a result 2
The support plates (126) (127) are moved symmetrically toward and away from each other. As shown in FIG. 3, the support plates gently support the pins (134) and (134) on the guide rails (142) and (142) on both sides. It is kept and displaced. In addition, a large number of air suction holes (143) are formed on the upper facing surfaces of both support plates (126) and (127), and a small room (145) is formed on the back side of the suction holes (143) with a member (144). A tube (14
A vacuum suction force is applied via 6) so that the bag for packaging is sucked by the suction hole (143). Therefore, when the support plates (126) and (127) are brought close to each other and then the support plates are separated from each other, the mouth of the bag existing between them can be greatly opened.

On the other hand, as shown in FIG. 4 and FIG. 5, two rods (149) standing on the upper surface of the laterally long lift member (148) are vertically slidably passed through the support block (136). , And pins (15) formed on both ends of the lift member (148) respectively.
0) supports a frame (151) rotatably in the vertical direction, and four support rods (152) fixed in parallel to the front surface of the frame (151) are connected to the support plate (152) as shown in FIG. 126) (127)
It is arranged in a gap (153) formed at the lower edge of the. Further, a link (155) is fixed to the inner end of a pin (154) rotatably penetrating the back surface of the chamber (106), and a pin on the back surface of the lift member (148) is fixed to a slit (156) at the end of the link. While engaging (157), the shaft of the link (154)
A roller (159) provided at the end of a lever (158) fixed to the outer end of the is engaged with an annular cam (160). As shown in FIG. 1, the cam (160) is annularly provided around the shaft of the rotor, and the end of the lever (158) is engaged with the horizontal cam (160). ) Is always held at a constant height. When the entire cam (160) is adjusted to move up and down, the lever (158) causes the link (155) to rotate up and down in FIG. 4, and the lift member (148) moves up and down. 4 support rods (152)
The height of is adjusted. As shown in Fig. 16, it is a support rod (15
The installation position of the support rod (152) can be set as necessary according to the length from the rim of the bag (300) supported by 2) to the bottom surface. In FIG. 2, the mechanism for moving the above-mentioned four support rods up and down is omitted, but a rod (163) for fixing the guide block (162) to the inside is penetrated through the rear surface of the chamber (106) and a spring is provided. (164) urges the rod (163) outward, and at the end of the rod (16)
5) is engaged with the cam groove (166). As shown in FIGS. 4 and 5, longitudinal guide grooves (167) (168) are formed on both side surfaces of the guide block (162), and the frame (151) is formed in the guide groove (167) on one side. While engaging the pin (169) provided at one end, the pin (17) at the end of the lever (171) rotatably supported on the side surface of the chamber (106) via the pin (170).
2) is engaged with the guide groove (168) on the other side, and the pin (173) at the tip of the lever (171) is engaged with the oblong hole (175) of the bracket (174) on the bottom plate (117). The groove (166) pulls the rod (163) to hold the bottom plate (117) in a closed state. However, the annular cam groove (166) in FIG.
When the bulges outward, the bottom plate (117) will
6) rotates about the axis to open the bottom surface of the chamber (106), and at the same time, the four support rods (152) also rotate downward. That is, as shown in FIG. 19, the support bar (152) and the bottom plate (117) rotate simultaneously, allowing the packaged product (301) to be removed downward.

When the chamber that rotates the circular orbit intermittently stops at a specified position, the bag (300) is supplied from above the chamber (106) to between the support plates (126) and (127) as shown in FIG. . In this case, a special cord (178) is used to supply the bag. As shown in FIG. 14, the cauldron (178) has a hollow inside, and has a large number of suction holes (179) (179) ... Formed on its surface and a hole (180) for connecting to a vacuum pump. When the bag (178) is inserted into the bag (300), the bag sticks to the bag, so the bag is integrated with the bag (10).
6) Can be supplied within. When the support plates (126) and (127) are brought close to each other from both sides of the bag (300) and then the support plates (126) and (127) are separated, the bag (300) as shown in FIG.
Are adsorbed to the support plates (126) (127) and opened.

When the chamber (106) rotates again and stops at the next stop position, the nozzle (1) is inserted into the bag (300) from above as shown in FIG.
81) is inserted, and the bag (300) is filled with the article to be packaged (182) through the nozzle. In this case, since the angulation (183) provided on the outside of the nozzle presses the surface of the bag (300) against the upper surfaces of both support plates (126) (127), the bag is filled with the weight of the packed object (182). (300) is prevented from sliding down, and the support rod (152) also supports the bottom surface of the bag (300).

The seal bar (184) and the seal base (185) provided at the inlet of the chamber (106) usually keep a large distance so as not to interfere with the movement of the nozzle (181) into which the bag is inserted, and as necessary. approach. That is, as shown in FIG. 6, the base material (187) is rotatably supported between a pair of blocks (186) fixed to the inner surface of the chamber (106), and the seal bar (184) is attached to the base material (187). While supporting, the pins (189) at both ends of the seal base (185) are engaged with the groove (188) formed in the block. As shown in FIG. 8, the groove (188) is formed on a circle centered on the support shaft (190), and is sealed along the arc-shaped groove (188) by the connected rod (191). It is designed to operate the platform (185). As shown in FIG. 6, there is a deviation (192) between the center line of the mounting shaft of the rod (191) and the center line of the pin (189), and as shown in FIG. When pin (191) is pulled as indicated by arrow (193), pin (189) moves along groove (188), and as a result, seal base (185) rises, and conversely, as shown in FIG. 194) and then press the seal stand (18
5) falls sideways. The crank bar (195) is attached to the support shaft (190) described above, and the pin (189) is engaged with the straight elongated hole (196) formed in the crank bar, and at the same time, the crank bar (195). The other end of the link (197)
Via a lever (198) provided on the base material (187). Therefore, when the pin (189) is moved along the circular arc groove (188) as shown in FIG. 9, the crank bar (195) is rotated by the pin (189), and this rotational movement is caused by the link (197) and the lever ( 198), the seal base (185) and the seal bar (184) rise together, and when the seal base (185) falls down as shown in FIG. 8, the seal bar (184) also falls down sideways. That is, FIG. 6 shows a state in which the seal base (185) and the seal bar (184) are laid sideways, and FIG. 7 shows the seal base (185) and the seal bar (184).
And are up. Further, as shown in FIG. 10, a plate (200) having a plurality of rubber holding members (199) attached to its tip is arranged on the surface corresponding to the lower side of the seal base (185) and fixed to the plate. The rod (201) is slidably supported in the holes of the upper and lower guides (203), and is urged by the spring (204) so as to push the plate (200) forward. For this reason, when the seal base (185) is laid down sideways as shown in FIG. 6, the holding members (199) ... Form gap holes (205) between them and press-contact the seal bar (184).

As described above, as shown in FIG. 16, when the chamber (106) in which the bag is filled with the objects to be packed starts moving again and stops at the next position, the shaft (208) is moved to the lifting block (208) as shown in FIG. The claw pieces (210) supported via the 209) are inserted into the bag (300), and the mouths of the bag (300) are stretched flat on both sides by these claw pieces (210). Immediately after that, as shown in FIG. 18, the seal base (185) and the seal bar (184) are laid down, and the bag (300) is made up of the elastic plate (200) and the receiving base (211).
Has a flat mouth.

As shown in FIG. 1, inside the main shaft (103) of the rotor, a pipe pole (21
2) is arranged and a cam plate (213) is fixed to the upper end of the pole like an umbrella, while a shaft rod (214) is rotatably installed inside the pole. The tip of a swing rod (216) having one end as a support shaft (215) is connected to a lever (217) fixed to the lower end of the shaft rod (214), and the swing rod (216) is a driving shaft (111).
It is arranged on the peripheral surface of a cam (218) fixed to the. Therefore, each time the drive shaft (111) makes one rotation, the swing rod (216) swings only once by the cam (218), and the shaft rod (214) at the center of the machine base is inverted by a predetermined angle. As shown in FIG. 12, a crank arm (219) fixed to the upper end of the shaft rod (214).
And a hammer (223) slidably installed in the guides (220) (221) are connected via a link (224), and the shaft rod (214) rotates clockwise within a range of about 30 degrees. Then, the hammer (223) is pushed outward. First
When the chamber (106) stops at a position facing the hammer (223) as shown in the figure, the rod (191) is pushed into the chamber (106) by the hammer (223),
As shown in the figure, the seal base (185) and the seal bar (184) are laid down sideways. When the chamber moves around the cam plate (213) in FIG. 12, the roller (225) provided at the tip of the rod (191) comes into contact with the cam plate (213). The bar (184) is prevented from standing up naturally.

Eventually, the lid on the upper part of the chamber is closed, and a vacuum is applied inside the chamber. That is, as shown in FIG. 1, a vacuum is constantly acting on the lower member (108) of the rotary valve via the pipe (226), and the arm (105) above the rotor communicates with the pipe (226). Hollow arms (10
A vacuum acts in the chamber (106) via 5). There are gap holes (205) between the sandwiching members (199) in FIG. 6, and a vacuum also acts on the inside of the bag from these gap holes (205).

As shown in FIG. 12, a sealing cam (228) is installed on a part of the cam plate (213) so as to be projected outward by the force of a spring (229), and a rod (191) is provided on this cam. When the position of (228) is reached, the rod (191) is pushed further by the cam. Therefore, in FIG. 8, the seal base (185) is further pushed in the direction of the arrow (194),
At the same time, an impulse current flows through the heater wire (242) and the mouth of the bag is heat-sealed. As shown in FIG. 11, a passage (230) is formed inside the seal bar (184), and this passage (230) has shaft members (231) (232) at both ends of the base material (187) and holes ( Since the cooling water always flows through the passages 233) and (234), the mouth of the heat-sealed bag is cooled quickly. The seal bar (184) has two nozzles (23
5) The portion of (235) is inserted into the base material (187), and the seal bar (184) is separated from the base material (187) from this nozzle (235) portion. As shown in FIG. 10, the pin (236) protruding from the seal bar (184) and the base metal (18
The seal bar (184) is engaged with the base material (1) by engaging with the small hole (238) of the spring plate (237) screwed to 7).
87) to prevent the heater wire (24
The terminal (239) at the end of 2) and the terminal plate (240) provided on the base material are in surface contact with each other so that electricity flows to the heater wire.

As shown in FIG. 12, a groove cam (241) is installed from the upper side behind the sealing cam, and the rod (191) is connected to the groove cam (24).
By 1) being pulled toward the center of the rotor, the seal base and seal bar stand upright in the chamber,
At the same time, air flows into the chamber from the rotary valve. At the same time, the bottom plate of the chamber is opened, and as a result, the vacuum packaged product (301) is discharged to the outside of the chamber as shown in FIG. 19, as described above.

Although the bag is sucked and opened by the two support plates (126) and (127) in FIG. 2, the suction hole (143) is formed on one side surface (106a) of the chamber (106) as shown in FIG. ) Is formed so as to adsorb the bag, and the bag can be opened by one support plate (126) moved by the rod (137) and the chamber wall surface (106a).

(Effect) According to the present invention, a pair of support plates are brought close to each other from both sides of a bag that is supported and supplied in a straight manner, suction bags are sucked into suction holes formed in both support plates, and the bags are spread by separating the support plates. Since the gap between the two support plates is small due to the proximity of the two support plates to restrict the inflow of air, it is possible to form a sufficient pressure difference between the inside and outside of the bag in combination with the ventilation gap formed in the bag mouth by the insertion of the cord. There is an effect that the bag can be surely expanded by the pair of support plates that set the finished thickness of the packaged product.

[Brief description of drawings]

FIG. 1 is a sectional view of an apparatus according to one embodiment of the present invention, FIG. 2 is a side sectional view showing a structure inside a chamber, FIG. 3 is a front sectional view inside the chamber, and FIG. 4 is a perspective view inside the chamber. Fig. 5 is a plan view of the inside of the bottom of the chamber,
6 and 7 are plan views of the upper part of the chamber, FIGS. 8 and 9 are side views of the sealing mechanism, FIG. 10 is a partial perspective view of the sealing mechanism, and FIG. 11 is a sectional view of the sealing. FIG. 12 is a plan view of the apparatus, FIGS. 13 to 19 are explanatory views of the work order of packaging, and FIG. 20 is an explanatory view of another embodiment. (103) …… spindle, (104) …… rotor, (105) ……
Arm, (106) …… Chamber, (110) …… Rotary valve, (112) …… Geneva top, (115) …… Lid,
(117) …… Bottom plate, (126) (127) …… Support plate, (143)
…… Suction hole, (178) …… 碦, (181) …… Nozzle, (18
4) …… Seal bar, (185) …… Seal base, (300)…
…bag,

Claims (3)

[Claims] 1. A means for moving a pair of flat support plates, which are supported on the peripheral portion of the rotor and have their longitudinal surfaces opposed to each other, along a circular orbit by one pitch by intermittent rotation of the rotor, A means for applying a vacuum suction force to a large number of suction holes formed in both support plates by a vacuum acting on a hollow chamber formed on the back surface of the both support plates, and an inside of a basket inserted from the bag mouth inside. A means for sucking and moving the bag by vacuum suction to supply the bag between the support plates in the middle of moving, and a means for bringing the support plates close to each other from both sides of the bag supplied by the bag. A means for adsorbing the bag in the suction hole of and for expanding and supporting the bag by separating the support plates from each other,
A packaging device comprising means for filling a bag to be packaged into a bag which is expanded while moving on a circular path and which is supported by both support plates. 2. The inside of the closed chamber is changed to a vacuum environment,
A vacuum packaging device configured to seal the opening edge of a bag accommodating an object to be packaged under this vacuum environment, wherein the chamber provided with a lid plate open on the upper surface and openable and closable on the opening surface has a circular orbit. Means for intermittently moving along the pitch by 1 pitch, means for opening the lid plate from the chamber in a specific range in the circular orbit and closing the lid plate in the other range, and a hollow member installed in the chamber. Formed two support plates facing each other in the longitudinal direction, and the vacuum suction force acting inside the bag inserted from the bag mouth causes the bag to be adsorbed to the bag and moved, and the lid plate is released from the chamber. Means for supplying a bag between the support plates in a certain area, and a vacuum acting on suction holes formed on the opposite surfaces of the support plates by bringing the support plates close to each other from both sides of the bag supplied by the cord. Suction the bag on both support plates with suction force And composing means for and support spread the bag by separating the two support plates, by means for filling the object to be packaged into the bag which is supported on and support plate spread during movement the circular path. 3. The vacuum according to claim 2, further comprising means for sealing the opening edge of the bag containing the article to be packaged in a vacuum environment and then removing the vacuum packaged product downward by opening the bottom plate of the chamber. Packaging equipment.