JPH0343127Y2 - - 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 supporting device for supporting the bag in a hanging form 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. While holding the bag, the bag is attracted by the vacuum suction force that acts on the suction holes formed on the opposing surfaces of the two holding bars, and when the gap between the two holding bars is widened, the opening of the bag is 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 unusable.

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 consists of a board installed vertically or approximately vertically, and a cover material that airtightly covers the board. After suctioning the air in the vacuum box and applying a vacuum to the packaging bag placed in the vacuum box, the opening edge of the bag is compressed between a seal bar and a seal stand in the vacuum box. In a vacuum packaging apparatus designed for welding, a suction bar 5 on one side that is long in the horizontal direction is arranged on the inner surface of the board, and a suction bar 13 on the movable side that is also long in the horizontal direction is arranged in front of the suction bar. The movable suction bar 13 is engaged with an operating element 18 outside the vacuum box via the connecting member 15, and the movable suction bar 13 is moved by the action of this operating element 18.
suction holes 8 for attracting and separating the bags from the fixed side suction bar 5, and for suctioning and holding the bags on the opposing surfaces of the suction bars 5 and 13, respectively;
20, and these suction holes 8, 20 are connected to passages 9, 20.
21 to a vacuum pump outside the vacuum box, and a plurality of elastic members 11, 11 made of a frictional material protrude in a dotted manner from at least one side of the suction bars 5, 13. On the other hand, the total width of both suction bars 5, 13 taking into account the amount of compression of the elastic material 11 is formed to be approximately the same as the width of the inside of the vacuum box.

(Function) A pair of suction bars arranged oppositely in the vacuum box form suction holes on their respective opposing surfaces.
Since these suction holes are communicated with a vacuum pump outside the vacuum box, the bag is suctioned and supported by both suction bars by the vacuum suction force acting on the suction holes. The suction bar is engaged with a connecting member outside the vacuum box, and the suction bars are moved toward and away from each other by operation of the connecting member, so that the mouth of the bag is opened and closed by the movement of the suction bar.

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, since the total width of both suction bars and the inner width of the vacuum box are approximately the same, when the vacuum box is closed by pressing the lid material against the wall, the movable suction bar is pushed by the lid material and the fixed side The elastic material is compressed by being pressed in the direction of the suction bar, and the bag is supported between the pair of suction bars by the repulsive force of the elastic material accompanying this compression.

(Example) In the drawings, the vacuum box includes a board 2 fixed to an arm 1 in a vertical or approximately vertical state, and the board 2.
The lid member 3 is in contact with the front surface of the disc and forms an airtight chamber with the disc. The end of the arm 1 is supported on a vertical axis (not shown), and the board 2 moves circularly about the axis, while the lid 3 is attached to the board 2 via a parallel link 4. Connected so they can be opened and closed. Further, the board 2 has a suction bar 5 fixed in a horizontally elongated manner on the front thereof, and a seal bar 6 provided at the upper part of the fixed suction bar 5 is fixed and supported by the inner end of a rod 7 protruding to the outside of the board. ing. As shown in FIG. 3, the fixed suction bar 5 has two suction holes 8, 8 formed on its front surface, and these suction holes are opened on the back surface of the board 2 through a hollow portion 9, and a tube is formed on the suction bar 5. It is connected via 10 to a vacuum pump. Further, in front of the fixed side suction bar 5 and at each suction hole 8, 8.
Rubber elastic members 11, 11, 1 are placed on both sides of the
1 are arranged and fixed to the stationary suction bar 5 so that each of these elastic members 11, 11, 11 protrudes in front of the stationary suction bar 5 by a predetermined amount. Furthermore, a movable suction bar 13 is disposed in front of the fixed suction bar 5, and the movable suction bar 1
Rods 14, 14 fixed to both ends of the board 3 are connected to a shaft 15 rotatably provided at the bottom 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 orbit of the board,
The curve of the groove 19 formed in the guide rail allows the movable suction bar 13 to move toward and away from the fixed suction bar 5. Third
As shown in the figure, the movable suction bar 1
3 has two suction holes 20, 20 formed inside, and a hollow part 21 and a tube 22 in which these suction holes 20, 20 are formed in series inside each of the suction bar 13, the rod 14, the shaft 15, and the lever 16. It is connected to a vacuum pump via.

On the other hand, as shown in FIG. 1, a sealing base 23 is provided at the upper part of the inside of the lid 3, and a pedestal 24 is disposed at the lower part thereof, and a spring 25 is provided between the pedestal 24 and the inside of the lid 3. has been established. 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 board 2 and the lid 3 are supported by the arm 1 and rotate intermittently in equal pitches in the horizontal direction, and at a predetermined stop position, the bag A
When the bag A is fed into the gap between the two suction bars 5 and 13 facing each other, the bag A is sucked and supported by one of the suction bars. 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 disk 2 starts rotating again, the movable suction bar 13 approaches the fixed suction bar 5 by the guide rail 18. When the cover material 3 is pushed from the outside and covers the panel 2, the main hose 27
The air inside the vacuum box is removed. 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 cannot resist the load of the packaged items contained in the bag A and the bag tends to fall off due to machine vibration. However, as the differential pressure between the inside and outside of the vacuum box increases, the lid material 3 is forcefully pressed against the panel 2, and at the same time, the movable suction bar 13 is pressed against the fixed suction bar 5 via the spring 25, so the elastic materials 11, 11 are compressed. And bag A is elastic material 1
1 and the movable suction bar 13. The air inside bag A is filled with elastic material 11,
11, 11, and then the opening of the bag is pressed between the seal bar 6 and the sealing 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) The present invention arranges a pair of suction bars in a vacuum box formed by a plate and a lid, fixes one suction bar to the plate, and operates the movable suction bar on the other side outside the vacuum box. hand,
While allowing both suction bars to be brought into contact and separated,
Suction holes are formed on the opposing surfaces of both suction bars, and the bag can be opened and closed by attracting the bag to the suction holes and moving the suction bars toward and away from each other.

Moreover, elastic materials are provided at intervals between the two suction bars so as not to impede the removal of air within the bag, and the total width of the two suction bars is adjusted to accommodate the amount of compression of the elastic materials. When the vacuum box is closed, both suction bars are compressed by the lid and the lid material forming the vacuum box, supporting the bag between the two suction bars, and also supporting the bag inside the vacuum box. Due to the differential pressure created when the bag is evacuated, the disc and lid material come into closer contact with each other, and the bag is compressed between both suction bars. Therefore, a suction bar that suspends the bag using only differential pressure can be used in the vacuum area of the vacuum box, which has the effect of preventing the bag containing the object to be packaged from slipping down and supporting the bag reliably.

[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 board installed vertically or approximately vertically and a lid material that airtightly covers the board is sucked, and 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 disposed, and a movable suction bar 13 which is also long in the lateral direction is disposed in front of the suction bar, and this movable suction bar 13 is connected to an operating element 18 outside the vacuum box via a connecting member 15. The operation element 18 causes the movable suction bar 13 to approach and separate from the stationary suction bar 5, and both suction bars 5,
13 are provided with suction holes 8 and 20 for holding the bag by suction, and these suction holes 8 and 2
0 is communicated with a vacuum pump outside the vacuum box through passages 9, 21, and a plurality of elastic members 11, 11 made of a frictional material are connected to at least one side of the suction bars 5, 13. A bag supporting device in a vacuum box, in which the total width of both suction bars 5, 13, taking into account the amount of compression of the elastic material 11, and the width of the inside of the vacuum box are formed to be approximately the same.