JP2741223B2 - Packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention fills a packaged object into a packaging bag,
The present invention relates to a packaging machine that carries out the operation of carrying the bag into a vacuum packaging apparatus and vacuum packaging the object to be packaged consistently and mechanically.

(Prior art) A packaging machine of the above-mentioned purpose has conventionally been disclosed in
As shown in Japanese Patent Publication No. 06, while the belt-shaped film is transported in the longitudinal direction, the film is rolled into a cylindrical shape around the packaged material, and a center seal and a top seal are applied to form a bag. Some products are transported together with the bag into a vacuum packaging device and vacuum-packed, but this type of bag inevitably has a different film thickness at the center seal.
There is a disadvantage that the airtightness at the time of sealing the bag mouth is impaired and the reliability as a vacuum packaging product is poor. For this reason, there is little demand for such machines to be very efficient and, ultimately, vacuum packaging using bags without a center seal is required.

Conventionally, JP-A-59-51004 discloses that, after a large number of bags are placed in a stack, the mouth of the uppermost bag is sucked and spread by a vacuum cup, and then the articles to be packaged are pushed into the bags. An apparatus for filling is provided, for example, when the articles to be unpacked from the filling apparatus are integrated with a bag, and sequentially loaded into a rotary vacuum packaging apparatus as shown in Japanese Utility Model Publication No. 56-53003. Then, following the operation of filling the package into the bag, the package can be automatically vacuum-packaged.

(Problems to be Solved by the Invention) However, in the above-mentioned filling apparatus, there is no guarantee mechanism for accurately sending the bag containing the article to be packed to a specified position in the pressure-resistant chamber for vacuum packaging. In other words, it is difficult to stop the rim of the bag along the mechanism for sealing the rim of the bag simply by sending out the bag containing the packaged object. In short, unless the bag mouth always moves along the same line during the transfer, it is difficult to stop the bag mouth aligned with the sealing mechanism of the pressure-resistant chamber.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a method for packing bags containing articles to be packaged in a plurality of vacuum packaging apparatuses arranged in parallel along the side surface of a delivery conveyor. A device supplied by the delivery conveyor, wherein a slider is moved along a guide rail provided so as to straddle the delivery conveyor, from one side of the delivery conveyor to a bag mounting table on the other side, in a constant cycle. Means for reciprocating, and four bag expanding bars provided on the slider are opened and closed in relation to the reciprocating operation of the slider, and a bag expanding bar inserted into the mouth of the bag on the bag placing table. Means for sending out the bag by friction and drawing it out onto the conveyor, a supply conveyor installed on the slider to supply articles to be packaged into the bag to be drawn out, and on a reciprocating path of the slider The bracket is swingably supported by the bracket, and the U-shaped stopper provided on the lever in association with the reciprocating movement of the slider faces the inside of the bag pulled out by the bag expanding bar, so that the packaged object is placed inside the bag. Means for pulling the bag-opening bar out of the bag with the resistance of the U-shaped stopper at the same time, means for supporting the isolated bag to descend and transfer it onto the delivery conveyor, and a screw rod engaged with the bracket. Adjusting means for displacing the bracket in parallel with the guide rail by rotation.

(Operation) The four bag-expanding bars installed on the slider that moves forward along the guide rails are inserted into the bag at the end portion and simultaneously expanded in four directions to support the bag, and at the same time, provided on the slider. A supply conveyor feeds the articles into the bag.

When the slider moves backward on the guide rail, the bag is pulled out by the bag expanding bar.At this time, the U-shaped stopper supported by the bracket in the upper area of the guide rail moves down to add resistance to the article to be packaged, Stop the movement of the package. In this case, since the blocking force of the U-shaped stopper is larger than the frictional force of the bag-expanding bar against the bag, the bag-expanding bar is automatically pulled out of the bag to isolate the bag, and the bag is automatically lifted. And then to the lower delivery conveyor.

As described above, the bag is separated from the bag expanding bar at the portion where the package receives the resistance of the U-shaped stopper, so that the bag is always isolated in the same place as long as the length of the package is constant. If the length of the packaged object changes, the bag rim can be released from the bag expanding bar at the same position by displacing the bracket by the change in the length of the packaged object by rotating the screw rod.

(Embodiment) FIG. 1 is a schematic view showing an overall plan view of the present invention, in which a plurality of vacuum packaging devices (12a) are arranged along a delivery conveyor (11) provided in a lateral direction from a filling device (10). (12b)
(12c) are provided in parallel.

FIGS. 2 and 3 show the above-mentioned filling device (10) in more detail. The slider (14) is supported on two horizontal guide rails (13) (13) having both ends fixed to the machine base. And
As shown in Fig. 4, a grooved frame (15) is placed on the slider (14).
And four air cylinders (16) (16) (17) provided in the frame (15) so as to face each other.
Bag-opening bars (18), (18), (19) and (19) each having an L-shaped cross section are fixed to the tip of the piston rod of (17). Second
As shown in FIGS. 3 and 3, each of the above-mentioned bag expanding bars (18) and (18)
(19) and (19) are provided in parallel with the guide rails (13) and (13), and in particular, are inclined so that the tips of the upper two bag expanding bars (18) and (18) are lowered. The frame (15)
A supply conveyor (21) having a number of rollers (20) (20)...
According to 1), a block-shaped packaged object (A) such as cheese or ham meat is supplied at predetermined time intervals in the direction of arrow (22). Further, a lever (25) is swingably provided on the machine base (23) via a pin (24) below the frame body, and an upper end of the lever (25) is linked to the slider (14). (26), while connecting the lever (25) and the crank arm (27) with a connecting rod (28).
Are connected via. Since the crank arm (27) rotates continuously by the power of the drive shaft (29) and swings the lever (25) in a constant cycle, the frame (15) and the four bag expanding bars (18) (19) ) Reciprocates along the guide rail (13).

On the other hand, a table (31) supported on the machine base is provided at the end of the guide rail (13) and in the direction in which the bag expanding bars (18) and (19) point, and the lower side of the table (31) is provided. A large number of bags (B), (B),... Are stacked on the mounting table (32). Each of these bags (B), (B) ... is connected by attaching a bag mouth to a narrow tape (T) coated with a pressure-sensitive adhesive, and winding the tape (T) by a shaft (33). The bag (B) is pulled out onto the table (31). The shaft (33) rotates by a predetermined angle each time the crank arm (27) makes one rotation, and pulls out the bags (B) one by one onto the table (31).

Further, a rod (35) having a lower end connected to an air cylinder (34) is vertically provided beside the table (31), and a clamp box (37) provided at the upper end of the rod via a connecting member (36) is provided. It is arranged on the table (31). As shown in FIG. 5, two claws (38) (38) protruding from under the clamp box (37) are opened and closed by the action of an air cylinder (39) provided on the side surface of the clamp box. When the bag (B) is pulled out onto the table (31), the clamp box (37) is lowered by the rod (35), and the two claws (38) and (38) repeatedly lift the bag with the bag opening therebetween. Do. Then, as shown in FIG. 6, when the mouth of the bag is lifted by the clamp box (37), the four bag expanding bars (18), (18), (19), and (19) advancing in the direction of the arrow (40) are moved. It is inserted into the bag (B). As shown in FIG. 4, the upper two cylinders (16) and (16) are provided in an inclined manner, while the lower two cylinders (17) are provided.
Since (17) is installed horizontally, at this time, four cylinders (18), (18), (19), and (19) are moved outward by the cylinders (16), (16), (17), and (17). , The opening of the bag is greatly expanded by these bag expanding bars. Next, as shown in FIG. 7, four bag-expanding bars (18) (1)
When 9) is retracted, each bag-expanding bar (18) (19) pulls the bag (B) in the direction of the arrow (41), so the bag (B) is forcibly peeled off from the tape (T). Is done.

On the other hand, a bracket (45) supporting a large hook-shaped stopper (43) via a pin (44) is disposed above the bag from which the bag is pulled out from the table (31). The stopper (43) is connected to an actuator (46) provided in the bracket through a lever (47), and as shown in FIG. 3, the tip (43a) of the stopper is lifted by the actuator (46) to open the bag expanding bar. (18) Allow the (19) to move forward in the direction of the table (31), and
By moving the stopper (43) downward as shown by the imaginary line at the same time as (19) retreats, the stopper (43) obstructs the packaged object (A) as shown in FIG. Each of the bag-opening bars (18) and (19) is retracted from the mouth of (B) so as to be pulled out. As shown in FIG. 2, the bracket (46) is supported by a block (49). The block (49) is connected to a guide rail (51) provided between two pillars (50) (50). It is engaged with the screw rod (52). The bracket (45) is moved along the guide rail (51) by rotating the screw rod (52) by the motor (53).
By adjusting the position of the bracket (45) according to the length of the bag (B), the bag (B) can always be dropped to a fixed position.

As shown in FIG. 2, the two pillars (50) (50)
Between the endless belts (55) (55) ...
Conveyor (11) formed by supporting the shaft on the shaft (56)
Are provided below the guide rails (13) and (13) so as to intersect with the guide rails, and each belt (55) (55) as shown in FIG.
, A lift (58) facing a plurality of support plates (57) (57) from below is installed, and the packaged object (A) collides with the stopper (43) as shown in FIG. By lifting the lift (58) before, the bag (B) and the packaged object (A) are left on the lift (58). Then, by lowering the lift (58), the bags (B) containing the articles to be packaged are transferred to the conveyor (11) and sent out by the conveyor. Since the bag-expanding bars (18) and (19) reciprocate along the guide rail (13) at a constant cycle to pack the packaged object (A), the bag is conveyed in the same cycle as the conveyor (11). It is sent by.

In addition, as a partially known example of the filling device, a bag is blown into a bag, or a bag is spread by using a force to push a packaged object into a bag with a rod. There is a thing which sends out and transfers it to a conveyor.

As shown in FIG. 1, direction change devices (60a) (60b) (60c)... Are provided at equal intervals in the middle of the feed-out conveyor (11).
Multiple vacuum packaging devices (12a) (12b) (12c) beside 1)
Are arranged side by side via a carry-in conveyor (61). As shown in FIG. 8, the turning device (60
a) (60b) (60c)... rotatably support the rollers (64), (64), (64), (64) on the respective comb portions of the support plate (63), and these rollers and the drive pulley (65). )
(65) and chains (66) and (66), and each roller (64) ... to each conveyor belt (55)
When the bag (B) reaches the direction change device (60a) with the switch (69), the air cylinders (67) and (67) are supported. As the board (63) is raised along the guides (68) and (68),
The bag (B) is carried into the carry-in conveyor (61) by the rollers (64) (64).

As shown in FIG. 9, the vacuum packaging device (12b) provided at the tip of the carry-in conveyor (61) includes a bowl-shaped base (71) provided on the legs (70) (70), and the base It consists of an inverted bowl-shaped lid material (72) that moves up and down on the base plate (71), a receiving conveyor (74) connected to a motor (73), and a seal base (74) connected to an actuator (75). 76) and a vacuum suction hose (77) are provided, while the lid (72) is provided with a seal bar (79) connected to the actuator (78). Then, the bags conveyed by the carry-in conveyor (61) are continuously carried onto the receiving conveyor (74), and when the shadow of the package (A) is cut off from the photoelectric switch (80), the motor (73) stops. At the same time, the lid (72) is moved down onto the base (71). When the cover (72) presses the switch (81) provided on the base plate, the air around the bag (B) starts to be sucked through the hose (77). And cover material (7
Approximate time until the inside of the 2) reaches the vacuum is accumulated by the timer, and when that time is reached, the two actuators (75) and (78) are replaced with the seal base (76) and the seal bar (79).
Are simultaneously moved to heat seal the opening edge of the bag (B). The sealing time is also accumulated by the timer, and when the set time is reached, air is sucked into the lid (72), and then the lid moves upward, and at the same time, the motor (73) moves the conveyor (74). As it is rotated, the vacuum packaged product is carried out via the roller conveyor (83).

The filling device (10) in Fig. 1 is 300 mm wide and 5 mm long.
When a 00 mm bag is used, it takes about two seconds to fill one bag with the object to be packaged, while one vacuum packing machine (12a) processes one bag. More than 10 seconds are spent on Therefore, in this case, five or more vacuum packing devices are used, and each direction changing device (60a) (60b)
(60c)… Electrically catches those with open lids among the vacuum packaging equipment (12a) (12b) (12c)… and selects the packaged items to be packed in such vacuum packaging equipment It supplies it in a way.

(Effects) According to the present invention, a plurality of vacuum packages are released via a delivery conveyor which always releases a bag containing an article to be packaged from the bag expanding bar at the same position and moves in a direction perpendicular to a guide rail for extracting the bags. With the distribution to the apparatus, the rim of the bag can be conveyed along the same line on the delivery conveyor, so that the rim of the bag can be fed in line with the sealing mechanism in the vacuum packaging device.

In addition, since the bag-expanding bar completes the packing of items to be packed during a simple one-way reciprocating movement, the packing efficiency is higher than with various devices provided conventionally, and mass production of vacuum packages is possible. become.

[Brief description of the drawings]

FIG. 1 is an overall schematic plan view of the present invention, FIG. 2 is an enlarged view of a filling device part of the previous figure, FIG. 3 is a cross-sectional view of the previous figure, and FIG. FIG. 5 is an explanatory view of a structure for expanding the bag, and FIG. 5 is a view taken along the line VV in FIG. 6, and FIGS. 6 and 7 are side views for explaining the order of expanding the bag. FIG. 9 is an enlarged sectional view taken along the line VIII-VIII in FIG. 1, and FIG.
It is an IX-IX line expanded sectional view in a figure. (10)… Filling device, (11)… Delivery conveyor,
(12a)-(12c) ... vacuum packaging equipment, (18) (19) ...
Bag expanding bar, (21) ... supply conveyor, (55) ... belt, (58) ... lift, (60a) to (60c) ... direction changing device, (63) ... support plate, (64) …… Roller, (66)
…… Chain, (80) …… Photoelectric switch, (B) ……
Bag, (T) ... tape,

Claims (1)

(57) [Claims] 1. An apparatus for supplying bags containing objects to be packaged to a plurality of vacuum packaging apparatuses arranged in parallel along the side surface of a delivery conveyor by the delivery conveyor, and straddling the delivery conveyor. Means for reciprocating the slider at a constant cycle from one side of the same conveyor to the bag placing table on the other side along the guide rail provided as described above, and four expanding means provided on the slider. Means for opening and closing the bag bar in relation to the reciprocating movement of the slider, sending out the bag by friction with the bag expanding bar inserted into the mouth of the bag on the bag mounting table, and pulling out the bag onto the conveyor; A supply conveyor installed on the slider to supply the articles to be packed therein, and a lever swingably supported by a bracket on a reciprocating track of the slider, and The U-shaped stopper provided on the lever in relation to the reciprocation of the slider is made to face the bag pulled out by the bag-expanding bar and the article to be packaged is pushed into the bag, and at the same time, the bag-expanding bar is pressed by the resistance of the U-shaped stopper. Means for removing the bag from the bag, means for supporting the isolated bag to descend and transfer it onto the delivery conveyor, and displacing the bracket parallel to the guide rail by rotation of a screw rod engaged with the bracket. A packaging machine constituted by adjusting means.