JPH0110332Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention supports a packaging bag containing an object to be packaged in a vacuum box, and after changing the inside of the vacuum box to a vacuum environment, The present invention relates to a bag support mechanism for supporting the bag in a hanging manner in the vacuum box in a vacuum packaging apparatus which heat-seals the opening of the bag.

(Prior art) A conventional rotary vacuum packaging device rotates multiple sets of two purely mechanical clips at equal intervals on a circular orbit, and sequentially supplies packaging bags to each set of clips. After opening the clamped bag and filling it with the item to be packaged, the bag is sent together with the clips into a vacuum box for vacuum packaging. On the other hand, when packaging bags are supplied, since each bag has a different distortion, clamping errors occur when repeatedly clamping the bags that are supplied one after another. With these automatic machines, a 2-3% error rate is unavoidable. On this point, Utsukai 51-
Publication No. 106670 discloses that multiple sets of two clamping bars are rotated in a circular orbit, and the two clamping bars are brought close to each other by the guidance of a grooved cam provided at the center of the circular orbit to hold a packaging bag. At the same time as the bag is clamped, the bag is attracted by the vacuum suction force that acts on the suction holes formed on the opposing surfaces of the two clamping bars, and when the gap between the two clamping bars is widened, the opening of the bag is also automatically expanded. Such a mechanism is disclosed, and since this mechanism clamps the entire bag with two clamping bars, it has the advantage of being able to reliably clamp the bag even if the bag is slightly distorted.

(Problems to be solved by the invention, etc.) However, even if the bag support mechanism that uses vacuum suction power as described above is used as it is in a vacuum packaging device, there will be no differential pressure inside the vacuum box, and the vacuum suction power will not function at all. As a result, the bag supported by the clamping bar would slide down due to the weight of the packaged items, making it useless.

In view of the above points, the present invention has been developed to create a bag that does not lose its clamping force even if the differential pressure that attracts the bag to the clamping bar in the vacuum box disappears, and that does not impede the removal of air within the bag. The purpose is to provide a support mechanism.

(Means for solving the problem) In order to achieve the above object, the present invention is formed by a board installed vertically or approximately vertically, and a lid material that airtightly covers the board. After suctioning the air inside the vacuum box and applying a vacuum to the packaging bag placed inside the vacuum box,
In the vacuum packaging apparatus in which the opening edge of the bag is pressed and welded between a seal bar and a seal stand in the vacuum box, a suction bar on one side that is long in the transverse direction is disposed on the inner surface of the disk; A suction bar on the other side, which is also long in the lateral direction, is arranged in front of the vacuum box, and the suction bar on the other side is supported on the disk via a member penetrating the disk, and the outer end of the member is connected to the vacuum box. The suction bars are engaged with guide rails that are concentric with the circular orbit to be rotated, and suction holes for suctioning and holding the bag are provided on the opposing surfaces of both suction bars. A plurality of elastic members formed of a frictional material are connected to the pump, and a plurality of elastic members made of a frictional material are protruded from at least one side of the suction bar in a dotted manner, and when the lid member is brought into close contact with the disc. A pressure element is provided on the back surface of the suction bar so as to push out the suction bar on one side of the suction bars on the other side.

(Function) A pair of suction bars provided oppositely in the vacuum box have suction holes formed on their respective opposing surfaces, and these suction holes are communicated with a vacuum pump outside the vacuum box. The bag is supported on both suction bars by the applied vacuum suction force. The suction bar is supported via a member that passes through the vacuum box, and is operated by engaging the member with a guide rail provided outside the vacuum box, so the movement of the suction bar does not cause the opening of the bag to open. Close it.

In addition, since a plurality of elastic members made of friction material are protruded from at least one side of the suction bar in a scattered manner, when a bag is held between a pair of suction bars, a gap is created at the mouth of the bag between each elastic member. It becomes possible to suck the air inside the bag through this gap. In particular, when the vacuum box is closed, the suction bar on one side of the pair of suction bars is pushed out from the back side by the pressure element, so this, combined with the anti-slip function of the elastic material, prevents the bag from slipping. firmly support.

(Example) Embodiments of the present invention will be described below based on the drawings.

In the drawing, the vacuum box is composed of a plate 2 fixed to an arm 1 in a vertical or approximately vertical state, and a lid member 3 that contacts the front surface of the plate 2 and forms an airtight chamber with the plate. are doing. The end of the arm 1 is supported on a vertical axis (not shown), and the board 2 moves circularly around the axis, while the lid 3 is opened and closed via a link 4 parallel to the board 2. They are freely connected. In addition, the board 2 has a suction bar 5 on its front.
is fixed in a horizontally elongated shape, and a seal bar 6 provided on the upper part of the fixed side suction bar 5 is fixed and supported at the inner end of a rod 7 protruding to the outside of the board. As shown in FIG. 3, the fixed side suction bar 5 has two suction holes 8, 8 formed on the front side, and these suction holes are opened on the back side of the board 2 through a hollow part 9, and a tube 10 is formed on the front side of the suction bar 5. It is connected to a vacuum pump via. Further, elastic members 11, 11, 11 made of rubber are arranged in front of the stationary suction bar 5 and on both sides of the suction holes 8, 8, respectively. It is fixed to the bar so that it protrudes a predetermined amount in front of the bar. In addition, a movable suction bar 1 is attached to the front of the fixed suction bar 5.
3 are arranged, and rods 14, 14 fixed to both ends of the movable suction bar 13 are connected to a shaft 15 rotatably provided at the lower part of the board 2. A lever 16 is provided at the end of the shaft 15 on the outside of the board 2, and a roller 17 bearing at the end of the lever 16 is attached to a guide rail 18 concentric with the circular track of the board, and a groove 19 formed in the guide rail is attached. The movable suction bar 13 is configured to move toward and away from the fixed suction bar 5 due to the curve. As shown in FIG. 3, the movable suction bar 13 has two
suction holes 20, 20 are formed, and these suction holes 2
0,20 as suction bar 13, rod 14, shaft 1
5. The lever 16 is connected to a vacuum pump via a hollow portion 21 and a tube 22 formed in series inside each lever.

On the other hand, as shown in FIG. 1, inside the lid material 3,
A sealing base 23 is provided at the upper part, a pedestal 24 is disposed at the lower part, and a spring 25 is provided between the pedestal 24 and the inner surface of the lid member 3. When the lid 3 is placed on the panel 2, the seal stand 23 is attached to the seal bar 6.
Furthermore, the pedestals 24 are installed on the back side of the movable suction bar 13 at opposing positions.

The illustrated embodiment is configured as described above,
The action will be explained below.

The board 2 and the lid 3 are supported by the arm 1 and are intermittently rotated horizontally at equal pitches. When the mouth of bag A is fed into the gap between two suction bars 5 and 13 facing each other at a predetermined stop position, bag A is sucked and supported by either suction bar. When the plate 2 starts to rotate, the movable suction bar 1 moves according to the curve of the groove 19 of the guide rail.
3 comes into contact with the stationary suction bar 5 and then separates, so that the bag A is attracted to both of these suction bars and opened. At the next stop position, the bag is fed with the article to be packaged. When the plate 2 starts rotating again, the movable suction bar 13 moves to the fixed suction bar 5.
approach. When the lid 3 is pushed from the outside and covers the board 2, the air inside the vacuum box is removed from the main hose 27. When the vacuum value of the vacuum box increases, the suction force of the suction bar stops working. Although the lever 16 is pushed down by the guide rail 18 and the suction bars 5 and 13 are pressed together, the bag A
The bag is not able to withstand the load of the packaged items and tends to fall off due to the vibration of the machine. However, as the differential pressure between the inside and outside of the vacuum box increases, the lid material 3
At the same time, the tension of the spring 25 acts on the movable suction bar 13 via the pedestal 24, and as a result, the bag A is attached to the two suction bars 5 and 1.
It is supported by being clamped between the two. The air inside the bag A is removed from the parts other than the parts clamped by the elastic members 11, 11, 11. Thereafter, the opening of the bag is pressed between the seal bar 6 and the seal stand 23 and melt-sealed. When the atmosphere is introduced into the vacuum box again and the lid 3 is opened, the bag is dropped from between the two suction bars to the outside of the box.

(Effects) This invention works on the back side of a pair of suction bars that are installed to support bags with vacuum suction force in a vacuum box, so as to push out the suction bar on one side of the suction bar on the other side. A pressure element is provided so that even if the suction bar loses its suction function due to a drop in pressure within the vacuum box, the bag is held by the force of the pressure element. In particular, one atmosphere of pressure acts on the outside of the lid 3, and this pressure becomes a force multiplied by the area of the lid 3, which clamps the bag. Coupled with the frictional force of the provided discontinuous elastic material 11..., even in the vacuum box, the suction bar can sufficiently support even heavily loaded items, making it easy to adapt to changes in bag width, and reducing bag catch errors. This has the effect that the advantages of suction bars can be utilized in vacuum packaging equipment.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view in side view showing an embodiment of the present invention, Fig. 2 is a - line view of the previous figure, and Fig.
The figure is a sectional view taken along the - line in FIG. 1. 2...Panel, 3...Lid material, 5...Fixed side suction bar, 6...Seal bar, 8...Suction hole, 11
...Elastic material, 13...Movable side suction bar, 2
0... Suction hole, 23... Seal stand, 24... Pedestal, 25... Spring, 27... Main hose, A... Bag.

Claims (1)

[Scope of utility model registration request] The air in a vacuum box formed by a wall installed vertically or approximately vertically and a lid material that airtightly covers the wall is sucked, and the air is sucked into a packaging bag placed inside the vacuum box. In the vacuum packaging apparatus, the opening edge of the bag is pressed and welded between a sealing bar and a sealing stand in the vacuum box after a vacuum is applied to the bag. A suction bar 5 is arranged, and in front of the suction bar, the other suction bar 13, which is also long in the lateral direction, is arranged,
The suction bar 13 on the other side is supported on the disk via a member 15 penetrating the disk, and the member 15
suction holes 8, 20 for engaging the outer ends of the bags with a guide rail 18 concentric with the circular orbit for rotating the vacuum box, and suction holes 8, 20 for suctioning and holding the bags on the opposing surfaces of the suction bars 5, 13, respectively. The suction holes 8 and 20 are connected to a vacuum pump outside the vacuum box through passages 9 and 21, and at least one of the suction bars 5 and 13 is made of a frictional material. A plurality of elastic members 11, 11 are protruded in a dotted manner, and when the lid material is brought into close contact with the disk, the suction bar on one side of the two suction bars is pushed out against the suction bar on the other side. A bag support device in a vacuum box is provided with a pressure element 25 between the suction bar and the back panel or cover material.