JPS6218409B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides flat tubes made by an inflation method or other methods, which are welded at regular intervals in the width direction to form bags. The film on one side near the bottom is cut parallel to the bottom 1 to form the opening edge 2 of the bag portion 4, and the film on the other side corresponding to this opening edge is made with discontinuous cuts 3 in the transverse direction. Using a continuous bag A equipped with This relates to a packaging device that impregnates the packaged product, inserts the packaged item into the package, seals the rim, and separates the package through discontinuous cuts to form individual packages (see Figures 1 and 2). .

[Prior art]

However, when this type of continuous bag A is sent out by a transfer roller and the hanging bag part is impregnated by a blowing wind,
As shown in FIG. 3, its front shape is such that the center portion of the bottom 1 of the bag portion 4 is raised and its corner portions 5 protrude obliquely downward (see FIG. 3).

Therefore, if the bag 1 is supported on a horizontal pedestal in this state, the corners will bend upward (see Figure 4), reducing the actual storage capacity of the bag, and the granules and When inserting a large number of small mechanical parts, electronic devices, etc., there is a risk that the bag may overflow, the edges of the bag may not be fully welded, and the items to be packaged may be damaged. Part 4
However, this is not desirable from the standpoint of effective use of materials.

In addition, if the object to be packaged is scattered objects, especially heavy machine parts, for example, metal products such as machine screws, rivets, washers, etc., the bag section 4 may be
The film on the side of the opening edge 2 swells significantly, causing the bag to lose its shape (see Figure 5), and when welding along the opening edge with a pair of welding jaws, the center part of the opening edge 2 hangs down. Therefore, there was a risk that the welding would be incomplete.

Moreover, the products packaged using such conventional devices were not in good shape after packaging and were unsightly.

[Problem to be solved]

This invention improves the shortcomings of the conventional device as described above, and is intended to reliably support the bag portion without damaging its shape from just before loading the packaged items until during loading and when sealing the opening edge. It is.

[Means for solving problems]

In this invention, one side of the film has an opening edge, and the other side of the film has discontinuous cuts to intermittently transport continuous bags connected in the vertical direction, one bag at a time. sent out from
A blower outlet is provided downward to impregnate the most hanging bag portion with blowing air, and a pair of welding jaws with a horizontally long welded portion are located directly below the transfer roller. In the packaging device, the continuous bag is mounted on the machine frame below the pair of welding jaws, and the packaging device is installed so that the article to be packaged comes into pressure contact with the bag portion after being put into the bag portion and then separates from the bag portion. A sloped guide plate is provided for guiding, and a pedestal with a mountain-shaped surface is provided on the front surface of the sloped guide plate, and the center is high and both sides are low. A presser guide plate that comes into contact with the film surface on the opening edge side is arranged on the upper part of the pedestal opposite to the slanted guide plate, and the pedestal is placed in a support position that supports the bottom of the bag part and in a position that supports the bottom of the bag part. A drive means is provided to swing the pedestal between the constant standby position and the constant standby position, which is retracted from the bottom, and the pedestal is oscillated from the constant standby position to the support position only from just before the packaged items are loaded until the welding jaws are pressed together. This packaging device is characterized in that it is provided with a braking device for driving and controlling the driving means.

[Effect]

The operation of the present invention configured as described above is as follows.

The continuous bag A is intermittently transferred by the length of one bag by the transfer roller in the same manner as in a known packaging device of this type, and after passing the bag portion at the tip between the pair of welding jaws, it is suspended between the inclined guide plates, Wind is blown down toward the bag portion from the downward blowing outlet to impregnate the bag portion.

Next, based on a command signal from the control device, the driving means is driven to swing the pedestal, which is always in the standby position, to a supporting position at the bottom of the bag, and to move the bottom of the impregnated bag into this pedestal. Place it on the surface of a table and support it from below.

Next, when scatterings to be packaged are thrown into the bag from the hopper, the scatterings fill the bag up to the corners and close to the opening edge. At this time, the bottom of the bag part is supported by a pedestal, and the center part of the bag part is held down by the inclined guide plate and presser guide plate from both the front and back sides, and the shape of the impregnated bag part remains almost the same. The state of ゝ is maintained.

With the pedestal 22 in the supporting position, the pair of welding jaws are pressed against each other, and the opening edge of the bag portion is pressed against the film on the opposite side and heat sealed. During this heat sealing, a cutting member protrudes from outside the transfer path of the continuous bag into the transfer path, cuts the discontinuous cut portion, and returns to its original position to form a package, similar to known packaging devices.

Next, the pair of welding jaws separate from each other, and
By restarting the driving means, automatically rotating the pedestal from the support position to the constant standby position, and releasing the supporting force of the package, the package can:
It falls downward under its own weight from between the inclined guide plate and the presser guide plate.

While the package is falling, the transfer roller is driven intermittently to send out the next bag in the same way as before, and after the next bag is impregnated by the blowing wind, the driving device moves the transfer roller to the pedestal. It rotates from the standby position to the support position and supports the bag from its bottom.

Thereafter, this operation is repeated successively to perform packaging in sequence.

The control device sequentially controls the driving of the pair of welding jaws and the transfer roller, similar to the known packaging device. It may be purely mechanical, electromagnetic, pneumatic, or a combination thereof.

〔effect〕

The effects of the present invention configured and operated as described above are as follows.

The pedestal is oscillated in the supporting position from just before the packaged item is introduced until it is pressed by the welding jaws, and the surface of the pedestal is formed in the shape of a mountain with a high central portion, so that the pedestal does not become pregnant. The corners of the bag are folded up, so that the volume of the bag does not decrease when the packaged items are put in, and the packaged items do not overflow or bulge up between the pair of welded jaws, allowing for mutual pressure welding. The mouth of the bag can be reliably sealed without fear of the packaged items being pinched and destroyed by these welding jaws, and without making heat sealing impossible.

With this pedestal supporting the bottom of the bag from below, the inclined guide plate and presser guide plate allow
Since the loaded bag is pressed from both the front and back sides, it is possible to prevent the bag from expanding unnecessarily due to the weight of the loaded items, and it is possible to maintain the shape of the bag in a state where it is almost impregnated by the wind. By working together with the stand, no load is applied to the discontinuous cut portion of the continuous bag.
This eliminates the possibility of the bag part being separated from this discontinuous cut during loading of the packaged items, eliminates the deformation of the opening edge, allows the opening edge to be reliably heat-sealed, and makes the shape of the sealed package more attractive. can.

[Embodiment]

Next, typical embodiments of the present invention will be described based on FIGS. 6 to 9.

In FIG. 6, 10 is a packaging device of the present invention. This packaging device 10 has a support member 12 for supporting continuous bags A wound in a roll built-in in a machine frame, and is equipped with a pair of clamping transfer rollers 11 for transferring the continuous bags A.

There is no difference in this invention even if instead of the above-mentioned roll-shaped continuous bag, a rolled flat tube is supported and processed during transportation to form the continuous bag A.

A blower outlet 13 is opened near the transfer roller 11, usually above the transfer roller 11, and downward. Below the transfer roller 11, there is a fixed welding jaw 14 and a movable welding jaw 15 in the direction across the continuous bag A.
A pair of welding jaws made of The opening edge of the bag portion 4 of the continuous bag A is sealed between the jaws 14 and 15.

Reference numeral 16 denotes a cutting member, which cuts the pair of welding jaws 1.
4, 15, and the welding jaws 14,
15 is in pressure contact with each other, it enters into the transfer path from outside the transfer path of the continuous bag A, cuts the continuous bag A from the discontinuous cut 3, and retreats to the outside of the transfer path again. . Up to this point, there is no difference from known packaging devices.

Furthermore, in FIGS. 6 to 8, reference numeral 17 denotes an inclined guide plate having a width approximately equal to the length of the transfer roller 11, and is attached to the machine frame of the packaging device 10 immediately below the pair of welding jaws 14, 15. The upper end of the inclined guide plate is pivoted by a pivot shaft 18 parallel to the transfer roller 11, and the lower end of the inclined guide plate moves forward (to the left in FIG. 6) from a substantially vertical position, by about 30 degrees. It is connected to a reciprocating mechanism so as to be tiltable up to 100 degrees, and guides the continuous bags A sent out from the transfer roller 11.

On the front side of this inclined guide plate 17, both side plates 1
At part 9, a pedestal support member 20 is provided that can be slid vertically and fixedly, and this pedestal support member 20
A pedestal 22 supported by a pivot 21 parallel to the pivot 18 is provided inside, and the surface shape of this pedestal 22 is chevron-shaped or ladder-shaped as shown in FIGS. 9 and 10. There is, and the central part is smaller than both sides,
The height of the pedestal 22 is about 1/10 to 1/3 of the width.

Further, on the upper surface of the pedestal support member 20, a side surface L is provided.
A letter-shaped presser guide plate support member 27 is provided so as to be able to move toward and away from the inclined guide plate 17, and the upright piece 28 of this presser guide plate support member 27 has a continuous portion that hangs down from the inclined guide plate 17. A presser guide plate 29 that comes into contact with the opening edge 2 side of the bag portion 4 of the bag is provided so as to be movable and fixed in the vertical direction, and the presser guide plate 29 and the inclined guide plate 17 are in a state facing each other, and The gap size is slightly narrower in the upper part than in the lower part.

The packaging device 10 is provided with a driving means for swinging the pedestal 22 between a support position where it supports the bottom of the bag portion 4 and a constant standby position where it is retracted from the bottom of the bag portion 4. , the driving means is driven and controlled to swing and set the pedestal 22 from the standby position to the support position only from immediately before the article to be packaged is put into the bag section 4 until the welding jaws 14 and 15 are brought into pressure contact with each other. A control device (not shown) controls this packaging device 10.
This control device, like the known device, sequentially controls the movement of the pair of welding jaws 14, 15 toward and away from each other, and the movement of the transfer roller 11, the blower, and the cutting member 16 in and out, together with this drive means. It may be purely mechanical or electrical, or a combination thereof.

The driving means includes a rotary solenoid 23 fixed to a part of the pedestal support member 20, and a rotary solenoid 23 fixed to a shaft 25 of the rotary solenoid 23, whose tip can move toward and away from the back surface of the pedestal 22. It consists of an operating rod 26 and a spring that biases the pedestal 22 to the substantially horizontal support position via the operating rod 26 when the rotary solenoid 23 is demagnetized;
The solenoid 2 is activated by a command signal from the control device.
3 is energized, the operating rod 26 separates from the back surface of the pedestal 22, and the pedestal 22, which has lost its support, rotates by its own weight around the pivot 21 and swings to the standby position. .

The operation of the embodiment of the above configuration is as follows.

The position of the support member 20 of the pedestal with respect to the inclined guide plate 17 is adjusted, and the pedestal support member 20 is fixedly set in a position where the receiving surface of the pedestal 22 can support the bottom of the bag portion 4 at the supporting position.

Next, the height of the presser guide plate 29 is adjusted so that the upper end of the presser guide plate 29 does not hit the pair of welding jaws, and the presser foot is adjusted so that the upper end of the presser guide plate 29 does not touch the pair of welding jaws, and the presser foot is adjusted so that the bag portion 4 that is filled with the blowing wind is slightly crushed. The interval between the guide plate 29 and the inclined guide plate 17 is adjusted so that when the inclined guide plate 17 is inclined, the opening edge 2 and the discontinuous cut 3 are at substantially the same height.

Then, start driving. First, the bag section 4 of the continuous bag A that has been fed out to the state shown in FIG. The pedestal 22 is swung from the standby position to the support position via the operating rod 26 by the spring force of the drive device;
This pedestal 22 supports and raises the bottom of the swollen bag portion 4.

Next, when the scattered materials to be packaged are thrown into the hopper 30, the scattered materials reach the corner portion 5 in the bag portion 4.
It fills up to near the edge of the opening. At this time,
The bottom of the bag portion 4 is supported by a pedestal 22, and the bottom of the bag portion 4 is
The center portion of the bag is held down from both sides by the inclined guide plate 17 and the presser guide plate 29, and the shape of the bag portion remains almost unchanged.

Next, the pair of welding jaws 14 and 15 are pressed against each other to press the opening edge 2 of the bag and the film on the opposite side, and the bag is sealed by heat. During this time, the cutting member 16 protrudes from outside the continuous bag transfer path into the transfer path, cuts the two discontinuous cuts, and returns to its original state.

Next, the pair of welding jaws 14 and 15 separate, and based on the command from the control device, the rotary solenoid 23 is energized and the operating rod 26 is rotated, and the pedestal 22 loses support and its pivot 21 The package and the pedestal 22 rotate around it due to their own weight, and the package falls downward, and the inclined guide plate 17 returns to the vertical state, and the pedestal support member 20, the pedestal 22, and the presser, which are integrated therewith, The guide plate 29 also moves slightly.

During this time, the transfer roller 11 is driven by a command from the control device, and the continuous bag A is sent out for the length of the next bag portion as before, and after the bag portion 4 is impregnated by the blowing wind, In response to the command, the rotary solenoid 23 of the drive device is demagnetized, the pedestal 22 is returned to the substantially horizontal support position by the spring force of the operating rod 26, and the inclined guide plate 17 is placed in the inclined state. Become.

This operation is then repeated to sequentially wrap the product.

[Effects specific to embodiments]

In an embodiment in which the pedestal 20 is supported by the pivot 21 and is swingably provided between the support position and the constant standby position by a rotary solenoid 23, the pedestal 20 can be smoothly oscillated; In addition, in the case where the solenoid 23 is energized only when the pedestal 20 is normally returned to the standby position, the solenoid energization time is shortened, its lifespan can be extended, and power consumption is also reduced. can.

When the height of the chevron on the pedestal is 1/6 to 1/3 of the width of the bag, the pedestal 22 hits the bottom of the bag on average, and this part is wrinkled. There is no risk of crushing the part into which the packaged item is placed.

In the case where the presser guide plate 29 is movable back and forth, up and down, and can be fixed, it is adjusted to press the most suitable place for the bag portion 4 according to the dimensions of the bag portion 4, and the flatness of the bag portion 4 is also adjusted. It is possible to create a state that is most suitable for the item to be packaged.

In addition, in the case where the distance between the inclined guide plate 17 and the presser guide plate 29 is narrower toward the top, there is an effect that the package sandwiched therebetween will easily fall if the pedestal 22 is removed.

[Brief explanation of the drawing]

The figure shows something related to this invention,
Fig. 1 is a perspective view of a continuous bag A used in this device, Fig. 2 is a partially vertical side view of the continuous bag, and Fig. 3 is a front view of the continuous bag in a state where the bag part is impregnated by a blowing wind. figure,
Figure 4 is a front view of the bag shown in Figure 3 supported on a flat pedestal, Figure 5 is a vertical side view of the bag without the presser guide plate, and Figure 6 is a side view of the bag shown in Figure 3. FIG. 7 is a vertical sectional side view of the apparatus of the invention, FIG. 7 is a perspective view of the main part of the invention separated from the packaging apparatus, and FIG.
Figure 9 is a longitudinal side view of the pedestal;
Front view of another embodiment of the pedestal of FIG. 10, No. 11
The figure is a schematic cross-sectional view showing an example of a reciprocating mechanism for tilting an inclined guide plate. Explanation of the main symbols in the diagram, A... Continuous bag, 2...
Opening edge, 3...Discontinuous cut, 4...Bag portion, 22...
...cradle, 29...presser guide.

Claims (1)

[Claims] 1. In the vicinity of a pair of sandwiching type transfer rollers that intermittently transfer continuous bags that are longitudinally connected in the vertical direction with discontinuous cuts on one side of the film and discontinuous cuts on the other side of the film, there are: A blower outlet is provided downward to impregnate the most hanging bag part sent out from the transfer roller with blowing air, and a pair of welded parts having a horizontally long welded part are provided immediately below the transfer roller. In the packaging device, the welding jaws are arranged so that the welding jaws are in pressure contact with each other and separated after the transfer roller is stopped and the article to be packaged is placed in the bag portion, and the welding jaws are attached to the machine frame below the pair of welding jaws. is provided with an inclined guide plate that guides the continuous bag, and on the front surface of this inclined guide plate is provided a pedestal with a mountain-shaped surface that is high in the center and low on both sides. A presser guide plate that comes into contact with the film surface on the opening edge side of the bag portion of the continuous bag is disposed on the upper part of the pedestal opposite to the front surface of the inclined guide plate,
A driving means is provided for swinging the pedestal between a support position supporting the bottom of the bag and a constant standby position where it is retracted from the bottom of the bag. 1. A packaging device characterized by being provided with a control device for driving and controlling a driving means so that the pedestal is always oscillatedly set from a standby position to a support position only until press contact.