JP2748022B2 - Packaging method and apparatus for bag-and-tied type - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention fills an object to be packaged into a bag while transporting the bag in a hanging manner, and then closes the bag with a binding material. The present invention relates to a packaging method and apparatus of a bag mouth bundling type in which the bags are sealed in a bound state.

(Prior Art) As shown in FIG. 8, after heat-sealing an opening edge (3) of a thermoplastic bag (2) filled with an object to be packaged (1), in order to obtain a sense of weight of the object to be packaged, Although a package is provided in which the binding material (4) is further bound below the opening edge, there are countless micro gaps inside the folds of the bag squeezed by the binding material (4). The liquid contained in the article to be packaged (1) oozes out above the binding material (4), and the transparency of the bag above the binding material is impaired. Therefore, conventionally, as shown in FIG. 9, after the object to be packaged (1) is filled, seals (6) and (7) are applied to the bag mouth in two stages, and the lower seal (7).
Is bound with a binding material so that the liquid does not seep out from the bound portion.

(Problems to be Solved by the Invention) However, as shown in FIG. 10, a bag (2) filled with an article to be packaged (1) is surrounded by an airtight chamber (9), and the air in the chamber is pumped by a vacuum pump. Pull out and bag opening is ninth
When the two-stage seals (6) and (7) are applied and the lower seal (7) is tied with a tying material as shown in FIG. Since a myriad of water droplets (10) (10) are attached in advance due to the boiling of the liquid, there is no point in applying the two-stage seal (7) to the vacuum package.

(Means for Solving the Problems) In the present invention, in order to form a vacuum package in which water droplets do not adhere between the two-stage seal of the bag mouth, a large number of sets of one-to-one sets of clampers are intermittently arranged one pitch at a time. The bag is transported by supporting the two side edges of the bag with the two-stage seal on the bottom edge and slightly above the bottom edge by the pair of clampers. While fixing the center of the bottom edge of the suspended bag from both sides, narrow the bottom edge of the bag slightly from both sides, wrap the binding material around the narrowed portion, and further clamp the pair at the rear stop position After narrowing the gap to widen the bag mouth and filling the bag with the object to be packaged, the bag is carried into an airtight chamber to reduce the air inside the bag, and heat seal the bag mouth. It was done You.

(Effect) Both sides of the bag with a two-stage seal at the bottom edge and a little upper portion are transported by being supported by a pair of clampers, and the center of the bottom edge of the bag suspended by the clamper at the position where the clamper stops. While fixing the part from both sides and stabilizing the bag,
Squeeze the upper part of the bag slightly narrower, wrap the binding material around the narrowed part, open the bag mouth when the clamper stops further, fill the package, and carry the bag into the airtight chamber. To reduce the air inside the bag and heat seal the bag mouth. As a result, when the bag carried out of the chamber is turned upside down, a vacuum package is formed in which the bag mouth is sealed in two steps and the binding material is applied.

(Embodiment) FIG. 1 shows a radial arrangement of eight sets of clampers (12) (12).. The transportation means of the clamper which rotates the rotor (11) intermittently by 45 degrees is shown. As shown in FIG. 6, the clamper (12) is provided with a spring (16) between a slider (15) provided in a pipe-made arm (14) and an end surface of the arm, and the slider (15) and a movable claw. (17) connected via a rod (18).
Normally movable claw (1) with tension in the direction of arrow (19) of 6)
7) is in close contact with the arm end surface (20), but the slider (1
5) When the pushing force of the cam acts on the pulley (21) provided on the lower side in the direction of the arrow (22), the movable claw (17) separates from the end surface (20) as shown in the figure. First, in the bag supply section (A) in FIG. 1, a bag is supplied to the clamper (12), and as shown in FIG.
2) (12) Hang the bag by clamping both sides of the bag (100).

When the clamper (12) moves to the seal section (B) and stops by the rotation of the rotor (11) in FIG. 1, a pair of seal bars (24) provided in the section is provided.
In (25), a seal (27) is applied slightly above the bottom edge seal (26) of the bag (100) supported by the clampers (12) and (12) as shown in FIG. In the case of supplying a bag which has been subjected to two-stage sealing in advance in the bag supply section (A), there is no need to provide the seal section (B).

Next, when the bag (100) is carried to the binding section (C), the bag is bound. As shown in FIG.
In this section, a pair of holding plates (29) (29) are rotatably supported on the block (30) via shafts (31) and (31), and a pair of gears (32) fixed to the shaft. (32)
Are engaged with each other so that the two holding plates (29) and (29) are interlocked with each other, and the rack teeth (34) are engaged with one of the gears via the intermediate pinion (33). Then, when the rack pin (34) is moved linearly by the air cylinder (35) and the intermediate pinion (33) is rotated, the two clamping plates approach as shown by the phantom lines (29a) and (29a) and are provided on the clamping plate. The protrusions (36) and (36) sandwich the bag (100), and the lower center portion of the bag (100) is first fixed by the protrusion (36) as shown in FIG. As shown in FIG. 4, bosses (38) (38) at both ends of the block (30) are engaged with two screw rods (40) (40) rotatably supported on a machine base (39), respectively. A bevel gear (43), an intermediate shaft (44), and a chain wheel (45) that connect the chain (41) and the operating shaft (42) that link the two threaded rods
When the length of the bag (100) changes in the vertical direction, the block (30) is moved up and down by rotating the two screw rods (40) (40), The pinching position by the projection (36) can be changed according to the length.

As shown in FIG. 5, the binding section (C) is provided with a pair of binding arms (47) and (48). Notches (49) (49)
When the bag (100) is fixed with the projections (36) and (36) of the holding plate, the binding arms (47) and (48) approach and the depression (49)
In (49), just above the fixing part by the protrusion (36) is the seventh.
The diaphragm (50) is narrowed as shown in Fig. IV. In this case, since the actual length (51) of the center of the bag does not change, the bottom edge (52) is formed in a sector shape. Further, as shown in FIG. 5, a large number of U-shaped binding members are provided in a row on a groove-shaped guide (53) provided on the upper surface of the binding arm (47) on one side. While the thing protrudes downward from the U-shaped gap hole (54), the press die connected to the air cylinder (55) is arranged,
When the bag is squeezed finely, the press die is pushed out by the air cylinder (55). As a result, the lowermost binding material is separated and pressed against the receiving mold (56) provided on the other binding arm (48), and as a result, the binding material is bound to the narrowed portion of the bag (100) as shown in FIG. 7V. The material (57) is wound.

In FIG. 1, the clamper is the bag expanding station (D).
7, the bag is inflated by the air pressure blown out from the air nozzle (53) inserted into the bag (100) as shown in FIG. 7 VI. In this case, as shown in FIG.
By operating the lever (60) and rotating the arm (14) on one side with the pin (61) as the axis, the arm (14) on the other side also interlocks with the sector gears (62) (63) meshing with each other The distance between the pair of clampers (12) (12) is narrowed to facilitate opening of the bag.

When the clamper stops at the filling section (E) in FIG. 1, the bag (66) is filled with the filling nozzle (65) inserted into the bag (100) as shown in FIG. 7 (VII).

After the distance between the pair of clampers is widened near the section (F) in FIG. 1 and the bag mouth is tightened, the bag is suspended in the airtight chamber (68) of the vacuum section (G) while being suspended by the clamper. It is carried in. Although not shown in the drawings, as shown in Japanese Patent Application Laid-Open No. 57-133819, each clamper (12) is provided on a vertical board, each board and each clamper are transported integrally, and a vacuum section (G ), A lid is placed on the board to form a chamber (68). Moreover, the chamber (68) reciprocates between the two sections (G) and (H), and the bag (10) as shown in FIG.
0) and remove the air inside the bag (10) as shown in Fig. IX.
The opening edge of 0) is heat-sealed with a seal bar (69), or the margin at the top of the seal is cut. The chamber (68) is then split and the package is removed from the clamper in the release section (H). Removed package 7
When the bag is turned upside down as shown in FIG. X, the upper part of the bag is formed of the binding material (57) to form a vacuum package.

FIG. 2 shows that the lower part of the bag is tied with a tying material while the bag is supported and transported by the transporting device (71) on one side, and then the bag is filled with articles to be packaged. With the transfer device (73) swinging right and left, the vacuum packaging device (7) that rotates while supporting a large number of chambers (74) (74).
This is another embodiment in which the bag is sealed after the vacuum is applied to the bag in the chamber (74) while the device (75) rotates while the device (75) rotates.

(Effect) According to the present invention, the lower central portion of the bag supported by the pair of clampers is fixed to stabilize the entire bag, and then the upper seal portion of the lower portion of the bag is squeezed finely, and a binding material is wound around this portion and wrapped. The mouth of the bag was widened and the inside was filled with the object to be packaged, and the bag was carried into an airtight chamber to reduce the air inside the bag and heat seal the bag mouth. The returned package has an effect of forming a bound vacuum package in which the space between the upper two-stage seals is not contaminated with the liquid contained in the package.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an apparatus for carrying out the present invention, FIG. 2 is an explanatory view of an embodiment different from the previous figure, and FIG. 3 is II in FIG.
FIG. 4 is a front view of the preceding figure, FIG. 5 is a plan view of the preceding figure, FIG. 6 is a partial sectional view of the clamper, FIG.
The figure is an explanatory view of a packaging order, and FIGS. 8 to 10 are explanatory views of a conventional example. (11) ... rotor, (12) ... clamper, (17) ...
… Movable claws, (24) (25)… seal bar, (29)… clamping plate, (36)… projection, (47) (48)… binding arm, (5
7) Binding material, (68) Chamber, (100) Bag

Claims (4)

(57) [Claims] 1. A large number of clampers each having one pair as one set
When the bag is moved intermittently by pitch, the upper side edges of the bag with the bottom edge provided with the upper and lower two-stage seals are supported and transported by the pair of clampers, and when the clamper stops at the binding operation position behind the same, While fixing the center of the bottom edge of the bag suspended from the clamper from both sides, narrow the upper seal portion of the bag bottom edge narrowly from both sides, wrap the binding material around the narrowed portion, and further stop position behind After narrowing the interval between the pair of clampers and widening the bag mouth, and after filling the bag with the article to be packaged, the bag is carried into an airtight chamber to reduce the air inside the bag, and the bag mouth is opened. A packaging method that is heat sealed. 2. A large number of clampers, one pair being one set,
Means for transporting intermittently by pitch, means for supplying a bag with a lower seal on the bottom edge to a stationary clamper, and means for supporting the upper side edges of the bag with a pair of clampers Means for applying an upper seal on the lower seal of the bag when the clamper is stopped at the rear, and fixing means for clamping the center of the bottom edge of the bag supported by the clamper at the rear stop position from both sides And squeezing the upper seal portion finely with a pair of rotating arms,
Means for winding the binding material around the narrowed portion, and means for opening the bag mouth by narrowing the gap between the clampers when the clamper stops behind, and means for filling the bag with the article to be packaged, Vacuum packing means for carrying the clamper into a hermetically sealed chamber while supporting the bag and heating and sealing the bag opening while reducing the pressure in the chamber. 3. A large number of clampers each having one pair as one set.
Means for transporting intermittently by pitch, means for supplying a bag with a two-stage seal on the bottom edge to a stopped clamper, and upper side edges of the bag supported by a pair of clampers And a fixing means for holding the center of the bottom edge of the bag supported by the clamper at a rear stop position from both sides, and the upper seal portion is squeezed finely with a pair of rotating arms, and the squeezed portion is squeezed. Means for winding the binding material, means for opening the bag mouth by narrowing the gap between the clampers when the clamper is stopped rearward, means for filling the bag with the object to be packaged, and further, A packaging apparatus comprising: a vacuum packaging unit that carries the product into an airtight chamber while supporting the same, and heat seals a bag opening while reducing the pressure in the chamber. 4. A number of sets of clampers, one set being one set,
Means for transporting intermittently by pitch, means for supplying a bag with a two-stage seal on the bottom edge to a stopped clamper, and upper side edges of the bag supported by a pair of clampers And a fixing means for holding the center of the bottom edge of the bag supported by the clamper at a rear stop position from both sides, and the upper seal portion is squeezed finely with a pair of rotating arms, and the squeezed portion is squeezed. Means for winding the binding material, and means for opening the bag mouth by narrowing the gap of the clamper when the clamper stops behind, means for filling the bag with the article to be packed, and a stop position behind the means. A packaging apparatus comprising a vacuum packaging means and a sealing means for a bag mouth arranged opposite to each other, and a means for delivering a bag from a clamper to the vacuum packaging means.