JPH0230853B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and a bag manufacturing apparatus for forming a bag from a rolled band and filling the bag with desired contents. The present invention is particularly suitable as a method and apparatus for packaging granular or powdered substances such as coffee and flour with sheets made of flexible materials.

A device for forming and filling bags made of flexible material is known from French Patent No. 1281258. In this prior art device, the bag is formed by winding paper oil, for example, onto a core attached to a rotating wheel or turret head. Further, in this device, the winding core is supplied to a core horizontally arranged on a rotating wheel. At this time, since the bag formed from the flexible sheet material or the curved film is arranged horizontally, the shape of the bag tends to collapse, which in turn reduces the reliability and productivity of the apparatus. Furthermore, since the bag is formed horizontally, it has the significant disadvantage that it must be erected in a vertical position in order to be sent to the subsequent filling process. Furthermore, in this device, the device must be stopped at any time in order to remove the bag from the core and transfer the holding frame. Such periodic stoppages not only reduce the productivity of the equipment but also result in significant power penalties. Furthermore, since the bag is made of a flexible material that easily loses its shape, it is particularly difficult to transport an empty bag by raising it from a horizontal position to a vertical position.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for forming bags for filling from rolled strips. It is also an object of the present invention to provide a method and apparatus for forming a bag by winding sheet material around a vertically arranged winding core of a predetermined shape corresponding to the desired shape of the bag. There is a particular thing. Still another object of the present invention is to provide a bag forming method and apparatus in which the winding core is provided with means for removing the bag during movement. Furthermore, another object of the present invention is to provide a bag forming method and apparatus that does not require changing the orientation of the bag when the bag is vertically removed from the core and sent to a subsequent filling process. There is a particular thing.

According to the present invention, the above object is achieved by configuring the belt-shaped sheet material to be pulled out vertically downward and guided parallel to the side surface of the winding core. Furthermore, according to the invention, a large number of vertical winding cores are arranged in an annular manner so as to be able to successively oppose the free ends of the strips pulled out from the rolls and suspended by their own gravity. These winding cores are sequentially arranged in parallel and close to the free end of the strip. Therefore, the flexible strip can be attached onto the vertical core without shifting from the correct planar arrangement for forming the bag.

In a method and apparatus according to a preferred embodiment of the invention, a strip of flexible material is cut into individual sheet pieces after its ends are secured on a vertical core.

In a method and apparatus according to another preferred embodiment of the invention, the formed bag is removed from the core by means of a detachment device located inside the core. In this case, the method and device according to the invention can perform the bag removal operation with high reliability without stopping the device while the core is being moved. Furthermore, a feature of the method and apparatus according to the present invention is that it includes a step of transferring the formed empty bag to a holding frame, and in this case, in the movement of the holding frame, this holding frame is transferred to the winding core. The core body is arranged coaxially with the core body and is configured to move in synchronization with the core body.

The present invention provides a method and apparatus for forming bags from rolled strips.
This method and apparatus are characterized in that, in the initial stage of the cycle process, the strip is guided vertically downward and placed parallel to and close to the side surface of the core.

The free end of the strip pulled out from the roll has a flatness suitable for stably attaching to the core, and is parallel to the side surface of the core due to tension in the longitudinal direction due to the action of gravity due to its own weight. It becomes possible to arrange them close to each other.

The method device according to the invention may include a cutting step in which the vertically downwardly directed strip is cut into individual sheet pieces only after its ends have been firmly fixed on the core. It's advantageous. Thereby, each sheet piece obtained by cutting the strip pulled out from the roll is transferred to the final bag forming area without damaging the vertical arrangement.

Furthermore, it is advantageous for the winding core to be moved parallel to and close to the vertical sheet strips, at least in the position of mounting the sheet strips onto the core. As a result, during installation, the core can be placed parallel to and close to the hanging direction of the strip due to its gravity, and each cut piece of the strip can be properly fixed on the core. It becomes possible.

Furthermore, it is desirable that the bag formed by winding the bag around the core is held in a vertically erect state with its opening facing upward. This arrangement allows gravity filling of the contents.

Furthermore, it is desirable that the winding core is provided with a detachment device for removing the bag from the core during movement. This detachment device has a movable plug (plate) and removes the bag from the core by applying an axial force to the bottom of the bag. This detachment device preferably has a procedure rod. This has a pivot which imparts a known kinematic effect on the movable bottom of the vertical core to produce coaxial movement. This action causes the bag to be removed from the core while the core is moving. The movable plug of each vertical core is attached to this push rod and moves in the axial direction of the push rod.

In the present invention, the bag formed by winding on the surface of the vertical core is operated by a movable plug provided on the core and a push rod acting on the movable plug.
It is advantageous to design it so that it can be transferred into a number of holding frames which are arranged on the underside and are associated with the core. These holding frames are arranged coaxially with the core arranged on the upper side, at least in the transport area of the bag,
Synchronizes with the movement of the core body. The bag is removed during this movement of the core, and within this removal area:
The movement of the core coincides with the movement of the lower holding frame.

Further preferably, the plurality of vertically arranged winding cores move in a ring or annular track, and in connection therewith the interlocking holding frame arranged on the lower side also moves in a synchronous ring or annular track. move. In this case, the bag is transported through a synchronous transfer area where the core and the holding frame move in coaxial synchronization with each other, and while both are in synchronization, the bag is removed from the core and transferred into the holding frame. .

The present invention significantly increases the reliability of the device, as well as improves operability and productivity. Furthermore, according to the present invention, maximum safety and operational precision are ensured.

In the present invention, a bag is formed from a band-shaped body wound into a flexible roll, and in addition, if necessary, filling and
Weighing, adjustment (inspection) and sealing can be performed under vacuum and in a continuous process. Powdered or powdered substances such as wheat flour, sugar, and coffee are suitable as the filling substance. Furthermore, the upstream side of the device of the present invention can be equipped with various devices such as printing or extrusion devices for applying textured patterns and providing heat-sealable inner and outer layers.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows how the end of a strip 1 made of flexible material moves vertically and downward. This strip is supplied from a strip winding roll or an extrusion molding machine (not shown). Feed roller 2 is
Guide the strip 1 downward. That is, the strip 1 is
It is transported in the vertical direction indicated by the arrow.

FIG. 2 shows a state in which the free end 1' of the strip 1 pulled out from the roll hangs down in the longitudinal direction due to its own weight and is arranged parallel to and perpendicular to the surface of the winding core 3.

FIG. 3 shows a state in which the free end 1' of the vertically suspended strip 1 is fixed onto the core 3 by, for example, a plate-shaped holding member 4. As shown in FIG. The strip 1 is the core 3
During this fixing operation, the strip 1 maintains its vertically parallel state.

FIG. 4 shows that after the strip 1 is fixed on the core 3, the sheet piece 5 is fixed by a known means (not shown).
This shows the state where the connection is disconnected. As is clear from the figure,
The cut sheet piece 5 is vertically and stably fixed on the core body 3. This vertical holding/fixing arrangement is maintained during the subsequent folding (winding) process onto the core. Further, the upper edge 6 of the cut sheet piece 5 is cut horizontally so that the periphery of the upper open end becomes horizontal when formed into a bag.

In FIG. 5, the upper edge 6 of the cut sheet piece 5 is
It is shown that it is always held horizontally during the subsequent process, ie, folding into the circumferential surface of the vertical core. In FIG. 5, a large number of vertical core bodies 3 are arranged in a ring shape (or circular shape), and each of them is suspended vertically downward and rotates, for example, along a ring-shaped transfer path of a horizontal rotation track. As a mechanism for cutting, bending, and joining the cut sheet pieces 5 to form the bag body 5', any conventionally known mechanism can be employed.

FIG. 6 shows that a detachment device 7 for removing the formed bag body 5' from the core body 3 is coaxially arranged inside the core body 3. This removal operation is performed while the core body 3 is rotating in the horizontal direction. This detachment device 7 is moved up and down by a pivot 9 that passes through the core body 3. That is, a roller 10 is attached to the upper end of the pivot 9, and the roller 10 engages with a groove track (cam) 11 formed on the outer peripheral surface of a fixed drum body (cylinder) 12, and rotates as the core body 3 rotates. This roller 10 moves while being guided along the groove 11, and as a result, the pivot 9 moves up and down in the axial direction, and the release device 7 at the lower end pushes down the inner bottom of the bag body 5' and returns to its home position. Return. A rotating track is installed on a chain with a number of holding frames 8. In order to remove the bag body 5', use the holding frame 8.
is interlocked with the core body 3 disposed above in the bag body 5' removal area, and moves at a speed synchronized with the core body 3 in order to accommodate each bag body 5' removed from the core body 3. do. In this configuration, the bag 5'
are removed and transferred during the synchronous movement of the core 3 and the holding frame 8, without any need to stop the device.

FIG. 7 shows the configuration of a rotating orbit that supports the core body 3 that moves in a circular shape (ring shape). This rotating orbit is formed in a ring shape, and coincides with the moving path of the holding frame 8 which operates and moves in synchronization with the core body 3 at an arc-shaped portion. A bag 5' vertically arranged with its opening facing upward is housed in the holding frame 8, and is transported to the subsequent filling process and other processes.

FIG. 8 shows another embodiment of an annular arrangement of a large number of holding frames 8 that move in synchronization with the core body 3. FIG.
Here, similarly, the holding frame 8 moves in synchronization with the core body 3 which is suspended above and moves on an annular track having the same shape.

FIG. 9 shows another embodiment of annular orbits in which the holding frame 8 and the core body 3 are interlocked and synchronized. In FIG. 9, a pair of core body 3 and holding frame 8 adjoins another group of holding frames 8' arranged in a circular manner on the outside. In this case, the empty bag 5' is transferred from the holding frame 8 to the outer holding frame 8' in a vertical arrangement with the opening facing upward, by a known conveying device,
It is sent to the subsequent filling and sealing process.

Similar to FIG. 9, FIG. 10 shows a synchronized pair of core body 3 and holding frame 8 adjacent to another group of holding frames 8' arranged in an annular manner on the outside. in this case,
The annular orbit of the outer holding frame group has an elliptical shape.
These holding frames 8' stand up vertically, accommodate and hold empty bags 5' with their openings facing upward, and transport them to the next filling and sealing process.

Other combinations of different geometries, movement schemes, and synchronization schemes are possible within the scope of the inventive subject matter. Furthermore, the size ratios, structure, and materials can be selected according to the process speed and the physical and chemical properties of the contents. Also, all methods and devices having the essential characteristics of the invention, i.e. all methods and devices for producing bags, in which the bag is formed by guiding the free end of a rolled strip of flexible material vertically downwards; A device is encompassed by the invention. Furthermore, all packing methods and apparatus capable of straightening a plurality of vertical cores arranged in an annular manner and arranging vertically suspended strip ends parallel to and adjacent to the cores are encompassed by the present invention. Ru. This packing device is capable of fixing the ends of the strips onto the core without interfering with the vertical arrangement of the ends of the strips that hang down under their own weight. Furthermore, the invention encompasses all packing devices having a vertical core with an internal release device for removing the bags. The detachment device is installed directly inside the core and can remove the bag during movement of the core by applying pressure to the inner bottom surface of the bag formed on the core. The core body is supported on a circular rotating wheel device and moves in conjunction with and in synchronization with a number of holding frames arranged below the core body. The bag formed on the core is transferred into the holding frame during movement of the core. Furthermore, the present invention forms a bag with an upward opening by wrapping vertical sheet pieces around a large number of vertical cores, and the bags are disposed below the core and move synchronously. It includes all the equipment that can be transferred during movement within a number of holding frames.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a feeding mechanism for a strip according to the present invention, FIGS. 2 to 4 are explanatory diagrams showing a process of creating a sheet piece from a belt, and FIG. 5 is an explanatory diagram showing a process of forming a bag from a sheet piece. FIG. 6 is an explanatory diagram showing the process of removing the bag body and storing it in the holding frame, and FIGS. 7 to 10 are explanatory diagrams showing other aspects thereof. 1...Band-shaped body, 1'...Free end of the band-shaped body, 2
... Feed roller, 3 ... Core body, 4 ... Pressing plate, 5 ... Sheet piece, 5' ... Bag body, 6 ... Upper edge,
7... Detachment device, 8, 8'... Holding frame, 9... Pivot, 10... Roller, 11... Guide groove, 1
2...Fixed drum body.

Claims (1)

[Claims] 1. A method for manufacturing a bag in which a desired content is filled from a strip, comprising: (i) guiding the strip vertically downward and parallel to and close to the side surface of the core; (ii) stably fixing the strip on the core and then cutting it into sheet pieces; (iii) winding the cut sheet pieces around the core and putting them into a vertical bag with an open top. (iv) removing the bag from the core while holding it vertically and transferring it to a holding frame. 2. The cut sheet piece is transported to an adjacent bag forming area while being fixed to the core, and is wound around the core in the bag forming area and formed into a vertical bag with an open top end. Method of scope 1. 3. The method according to claim 1 or 2, wherein a large number of core bodies are arranged in a vertical direction and move along a predetermined conveyance path. 4 The bag body is removed from the core body while the core body is being transferred, and the bag body is transferred into the holding frame.
Any of the methods described in Items 1 to 4. 5. The holding frame is disposed coaxially with and below the core body at least in the transport area of the bag body, moves synchronously with the core body, and moves the bag body above the core body during this synchronous movement. The method according to claim 4, which is removed from the . 6 A large number of core bodies move in a ring shape or an annular transfer path associated with a large number of holding frames disposed below that move in conjunction with and in synchronization with the core bodies, and the bag body is The method according to claim 4, wherein the method is transferred and housed within a holding frame in a synchronous movement area. 7. Removal of the bag from the moving core,
Claims 1 to 6 are carried out by applying an axial force from the inside of the bag to the bottom surface of the bag using a bag removal device having a movable plug provided on the core. Either way. 8. Claim 7, wherein the bag removal device comprises a coaxially movable push rod having a pivot acting on the internal movable bottom of the core.
Section method. 9 In an apparatus for manufacturing a bag for filling contents from a strip, a feed roller that feeds the strip vertically downward, and a device that winds the strip fed by the feed roller and winds it into a bag. a vertically arranged core body for cutting, a pressing member for press-fixing the strip-shaped body onto the side surface of the core body, a cutting device for cutting the strip-shaped body pressed and fixed onto the core body into sheet pieces;
a mechanism for folding and joining the cut sheet press-fixed onto the core to form a bag with an open top;
A filling bag manufacturing apparatus comprising a mechanism for removing the bag from the core and a holding frame located below the core to accommodate the bag removed from the core. . 10. The apparatus of claim 9, wherein the plurality of cores move along a transfer path including a bag forming area and a bag removing area. 11. The apparatus of claim 10, wherein the plurality of holding frames are arranged coaxially with the core body, at least in the bag removal region, and move in synchronization with the movement of the core body. 12 A number of core bodies move in a ring or annular transfer path, and a number of holding frames move synchronously in a ring or annular transfer path associated with the transfer path of the core, and the transfer paths are synchronized. 11. The apparatus of claim 10, wherein the core body and the holding frame are arranged coaxially with respect to each other, and the bag body is removed from the core body and is housed vertically in the holding frame. 13. Claims 9 to 12, wherein the core body has a bag removal mechanism having a movable plug that applies an axial force from the inside of the bag to the bottom surface of the bag. any device. 14. The apparatus of claim 13, wherein said bag removal device comprises a push rod.