JP2840886B2 - Rotary vacuum packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention conveys a bag having an open top along a circular orbit and, while the bag moves along the circular orbit, fills the bag with an object to be packaged. The present invention relates to a device for moving the object to be packaged in a pressure-resistant chamber and vacuum-packing the object to be packaged in the chamber.

[0002]

2. Description of the Related Art A conventional device of this type is disclosed in
102302, a rotor (2) having four sets of clamps (1) and four chambers (3) as shown in FIG.
When the bag (5) is supported at the position (6) by the clamp (1), the bag (4) is rotated intermittently by 90 degrees each and the bag (5) is rotated at the positions (7) and (8). The package is stopped and the package is supplied, and the bag is moved into the chamber (3) by the swinging transfer mechanism (10) as shown by the arrow (11), while the chamber (3) rotates once. Discloses an apparatus for vacuum packaging an article to be packaged in the chamber.

[0003]

In FIG. 6, however, the bag held by the clamp 1 is sandwiched by the clamp of the transfer mechanism 10, and the bag is further sandwiched by the clamp in the chamber 3. In this case, the bag is changed. Since it is necessary to walk between a plurality of clamps, it is impossible to prevent pinching mistakes that occur in about 2 to 3 bags out of 100 bags for delivery of bags. However, there are drawbacks that result in defective vacuum packaging products.

[0004]

SUMMARY OF THE INVENTION According to the present invention, in order to reduce bag delivery mistakes and perform vacuum packaging without failure, a pair of two clamps for clamping both side edges of one bag is provided. Are rotated intermittently at the same pitch as the arrangement interval of these clamps, and after supporting the bag with the clamp at the first stop position, filling the bag with the packaged object at the rear stop position. A bag filling machine for releasing the bag from the clamp at a further rear stop position,
A plurality of sets of airtight pressure-resistant chambers composed of individual members were intermittently rotated along a circular orbit different from the rotation orbit of the clamp, and bags released from the clamps were successively received in each pressure-resistant chamber. Then, a vacuum is applied to each of the airtight pressure-resistant chambers,
The bag packing machine and each of the pressure-resistant chambers are installed with a difference in height so that the clamps rotate on the upper surface of the pressure-resistant chamber, and the bags supported by the clamps are directly separated by the divided pressure-resistant chambers. In the pressure chamber, a punching knife for forming a ventilation hole in the bag and a sealing mechanism for pressing and welding the bag mouth below the punching knife are provided in the pressure-resistant chamber.

[0005]

A bag filling machine for rotating a bag suspended by a clamp along a circular orbit fills a bag to be packaged in the middle of the bag, and then conveys the bag toward a release position.

On the other hand, in a vacuum packaging machine that rotates the pressure-resistant chamber at a position slightly lower than the clamp, the chamber is divided into two parts before coming into contact with the bagging machine, and then the two members of the pressure-resistant chamber are brought into close contact with each other. Therefore, most of the bag is secured in the airtight room of the chamber while the mouth of the bag is sandwiched between the upper surface of the pressure-resistant chamber. Then, when the pressure-resistant chamber starts to rotate, a hole is punched in the surface of the bag with a punching knife, and the air in the bag is sucked from the hole, and the upper portion of the hole is sealed by a sealing mechanism. is there.

[0007]

FIG. 1 shows four sets of clamps (20) each having two sets.
Shows a bag filling machine (22) attached to a rotor (21).
The rotor (21) rotates intermittently by 90 degrees in the direction of the arrow (23) integrally with each clamp (20), and supplies the bag (24) to the clamp (20) stopped at the position A, At the B position, the bag (24) is filled with the to-be-packaged material, and at the C position, the bag is filled with the seasoning liquid.
The clamp moves toward the bag release position D.

On the other hand, next to the bag packing machine 22, a vacuum packing machine 2 formed by providing four sets of pressure-resistant chambers 27 each composed of two dividable members 25 and 26 around a rotor 28.
9 are installed. As shown in detail in FIG. 2, the vacuum packaging machine includes a main shaft 3 mounted on a bearing 31 provided on an upper surface of a machine base 30.
In addition to supporting the two axes vertically, a circular table-shaped rotor 33 is fixed to the upper end of the main shaft, and a movable disk 34 is fixed on the rotor with screws 35. A driven shaft 38 connected to a driving shaft 36 in the machine base via a chain 37 is engaged with the main shaft 32 via a Geneva mechanism 39. Therefore, the power of the driving shaft 36 causes the main shaft 32 to move with the movable disk 34. Rotate intermittently by 90 degrees. Four cylindrical arms 40 radially provided on the peripheral surface of the movable disk 34
Each of the pressure-resistant chambers 27 is provided at the front end of each of the pressure-resistant chambers.
Therefore, each pressure-resistant chamber 27 is integrated with the movable disk 34 to 9
Rotate by 0 degree angle.

The chamber 27 is composed of a main body 25 and a lid member 26 pivotally supported by a pin 43 so as to be openable and closable, and is fixed to a bell crank 46 supported by a bracket 45 on the back of the main body and to the lid member. The lever 47 is connected to the lever 47 via a link 48, and a roller 49 provided at the end of the bell crank is pressed against a cam 50 rotatably provided around the bearing 31 by the pulling force of a spring 51. Further, a donut-shaped control plate 52 is disposed around the main shaft 32 below the machine base 30, and the cam 50 and the control plate 52 are connected to each other via a rod 54 passing through a long hole 53 on the upper surface of the machine base. A bell crank 56 supported on the underside of the machine
And the control plate 52 via a link 57, and furthermore, a roller 58 provided at one end of the bell crank is connected to a driving shaft 36.
Of the cam 59.

FIG. 4 shows the four chambers (27) described above,
The relationship with a cam (50) for opening and closing each chamber is shown in a plan view. As described above, when the four chambers (27) rotate by 90 degrees in the direction of the arrow (61) by the power of the driving shaft (36), the small cam (59) makes one rotation at this time. When the cam (59) makes one rotation, the first bell crank (5
6) swings only once about the pin (62), and transmits this swinging motion to the large cam (50) via the link (57). As a result, the chamber (27) moves in the direction of the arrow (61) by 90 degrees, and the large cam (50) advances in the same direction (63) by 90 degrees, and the chamber (27) stops. During this time, the large cam (50) retreats (64) by 90 degrees in the opposite direction. Therefore, as shown in FIG. 1, the two divided members (25) and (26) of the chamber stop in such a manner as to embrace the stopped bag (24), and then the rotation of the large cam (50) is reversed. Due to the movement of the cam bulging portion (65), the bell crank (46) rotates at the position A to divide the chamber (27), and the chamber (25) divided at the position B by rotation of the bell crank (46). (26) closed again and bag (24)
Pinch. FIGS. 2 and 3 illustrate such a condition, after which the clamp (20) releases the bag (24).

As shown in FIGS. 2 and 3, the chamber (2)
Lever (6) with the air cylinder (66) provided outside of (7)
7) is rotated, and the perforating knife (68) in the chamber is swung to form a large number of tear holes on the surface of the bag (27) as shown in FIG.
(69) is formed. On the other hand, connecting material (70) on movable disk (34)
A fixed disk (72) supported on a machine base (71) is provided through a port, and a port (73) formed in the fixed disk is connected to a vacuum pump via a hose (74). For this reason, the chamber is provided only while the passage (75) of the rotating movable disc is in communication with the port (73).
A vacuum is created in (27). For this reason, the air in the bag is sucked through the tear hole (69) of the bag shown in FIG. (The structure as described above and the structure below the structure are evident from Japanese Patent Application Laid-Open No. Sho 62-182014.) Then, the second cylinder 76 outside the main body.
The seal bar (77) in the chamber by the seal base (78)
And then heat sealed the bag mouth,
By pushing the blade (80) with the cylinder (79), the bag is cut (8) between the seal (81) and the tear hole (69) as shown in FIG.
2) You can.

[0012]

According to the present invention, immediately after the bag hung by the clamp is released from the clamp after receiving the filling of the object to be packaged, the bag opening is directly clamped in the split pressure-resistant chamber, and then the received bag is removed. The air inside the bag is removed from the hole of the piercing knife while covering with the pressure-resistant chamber, and the bag mouth is sealed with a sealing mechanism. As compared with the device with many pinching mistakes in which the bag walks through the clamp of the vacuum packaging machine, mistakes such as dropping of the bag or hanging of the bag can be reduced.In particular, the pressure-resistant chamber sandwiches the entire width of the bag , The distortion of the bag caused by the weight of the packaged object inside is small. In other words, in the case of partial clamping by the clamp, the load on the packaged object causes a vertical tensile wrinkle at the bag mouth and a seal is applied on the wrinkle, so there was a problem with the vacuum density of the bag. Since the entire width of the bag is sandwiched between the pressure-resistant chambers to prevent the generation of vertical wrinkles, there is a synergistic effect that the vacuum tightness of the bag is also improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view of the vacuum packaging machine in the preceding figure.

FIG. 3 is an explanatory view of a state in which a bag is clamped by a pressure-resistant chamber.

FIG. 4 is a plan view of a mechanism for opening and closing each pressure-resistant chamber.

FIG. 5 is an explanatory diagram of a packaged product.

FIG. 6 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 (20) ... Clamp (21) ... Rotor (22) ... Bagging machine (24) ... Bag (25) (26) ... Member (27) ... Pressure chamber (28) ... Rotor (29) ... Vacuum packaging machine (34 )… Movable disk (36)… Drive shaft (39)… Vineva mechanism (68)… Punching knife (72)… Fixed disk (74)… Hose (77)… Seal bar

Claims (1)

(57) [Claims] 1. A pair of clamps for clamping both side edges of one bag are intermittently rotated at a pitch equal to an interval between the clamps, and at a first stop position thereof. A bag filling machine that supports the bag with the clamp, fills the bag into the bag at the rear stop position, and releases the bag from the clamp at the rear stop position; A plurality of hermetically sealed pressure-resistant chambers composed of a plurality of members were intermittently rotated along a circular orbit different from the rotation orbit of the clamp, and bags released from the clamp were successively received in each pressure-resistant chamber. after,
A vacuum is applied to each of the pressure-tight chambers, so that the bag packing machine and each of the pressure-resistant chambers have a difference in height so that the clamp rotates on the upper surface of the pressure-resistant chamber. Attached and installed, and configured so that the bag supported by each clamp is directly clamped in the divided pressure chamber, and in the pressure chamber,
A rotary vacuum packaging apparatus comprising: a punching knife for forming a vent hole in the bag; and a sealing mechanism for pressing and welding the bag mouth below the punching knife.