JP2000335511A - Flat bottom forming device for vertical bag forming, filling and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely bend a lateral seal section of a packaging member toward a bottom face side to form a flat bottom face and realize a high speed operation of a vertical bag forming, filling and packaging machine. SOLUTION: There is provided a bending member 100 moved in a lateral direction just above heater blocks 5A, 5B so as to bend the lateral seal section formed at the bottom section of the packaging member toward the bottom face of the packaging member. Since the bending member 100 folds the lateral seal section at a position just above the heater blocks 5A, 5B, the folding operation can be carried out just after the lateral sealing operation. Further, there are provided an intermediate cooling means 200 for cooling a bottom section 11 of a packaging member 10 transported from the lateral seal positions attained by the lateral heater blocks 5A, 5B in a downward direction, and transporting means 300 for transporting the dropped packaged member 10, and the transporting means 300 is formed with a flow passage 310 for the cooling medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical bag making / filling and packing machine for forming a band-shaped wrapping film into a bag and filling and packing an object to be wrapped therein, and more particularly, to a flat bottom packing body. The present invention relates to a flat-bottom forming apparatus for a vertical bag making and filling machine having a structure for folding a formed horizontal seal portion (also referred to as a flap).

[0002]

2. Description of the Related Art As shown in FIG. 15, a vertical bag making and filling machine is provided with a forming tube 1 for forming a packaging film F into a tubular shape, and a belt-like shape drawn out from a winding drum 2. While the packaging film F is wound around the outer peripheral surface of the forming tube 1 in a tubular shape, the feeding belt 3
The packaging film F wound around the forming tube 1 is vertically sealed using a vertical heater block 4 to form a cylindrical shape.

Further, a packaging film F formed into a cylindrical shape is fed out below the forming tube 1, and is sandwiched from a lateral direction by a pair of horizontal heater blocks 5A and 5B to form a laterally sealed package 10. rear,
The inside of the package 10 is filled with the article to be packaged via the forming tube 1. The package body 10 filled with the article to be packaged is further conveyed downward by the feeding belt 3, and is then horizontally sealed at the upper end by the tip sealing heaters 5A and 5B to be sealed.

As shown in FIG. 14 (a), there has been conventionally proposed a packaging form (flat bottom packaging body) in which the bottom 11 of a bag 10 formed into a bag shape is made flat and can be placed vertically. In the case of forming a flat bottom package of this type, in the vertical bag making and filling machine described above, a triangular plate-like member called a bottom folding plate is attached to the lower side of the package 10 when the packaging film F is horizontally sealed. Is added.

However, the bottom portion 11 of the flat bottom package 10 formed by the bottom folding plate is provided with a horizontal seal portion 12.
Extend downward and remain (see FIG. 14A).
The horizontal seal portion 12 hindered the flat-bottom package 10 from standing upright.

[0006]

Therefore, in the bag making, filling and packaging machine described in Japanese Patent Application Laid-Open No. Hei 10-35603 previously proposed by the present applicant, a pair of heater blocks 5A, 5 are used.
After the packaging film F is horizontally sealed by B, the other horizontal heater block 5A is further advanced in a direction in which one of the horizontal heater blocks 5B is retracted, and the horizontal heater block 5A is moved to the bottom 11 of the flat bottom package 10 by the horizontal heater block 5A. A configuration in which the formed horizontal seal portion 12 is folded toward the bottom surface is incorporated.

According to this configuration, the horizontal seal portion 12 formed on the bottom portion 11 can be securely folded to form the flat bottom package 10 having the form shown in FIG. 14B. Since the operation must be performed in multiple stages, the operation mechanism of the horizontal heater block is complicated. In addition, the operation time of the horizontal heater block is prolonged, which is an obstacle to speeding up the operation cycle of the apparatus.

Further, the conventional vertical bag making and filling machine is provided with folding means for the horizontal seal portion 12 below the horizontal heater blocks 5A and 5B, and the horizontal seal portion 12 is folded in the next packaging cycle. There is also a horizontal heater block 5
After the horizontal sealing by A and 5B, the horizontal sealing portion 12 is naturally cooled before folding in the next cycle, so that the horizontal sealing portion 12 may be hardened and may not be fully folded. In particular, when the apparatus is stopped immediately after opening the horizontal seal blocks 5A and 5B due to a supply failure of the articles to be packaged, the horizontal seal portion 12 is cooled and solidified, so that folding can be performed in the next cycle. Disappears.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and ensures that the horizontal seal existing at the bottom of the flat-bottomed package is folded and that the speed of the vertical bag-making and filling machine is increased. The purpose is to realize.

[0010]

In order to achieve the above-mentioned object, the present invention provides a method for winding a band-shaped wrapping film around an outer peripheral surface of a forming tube for supplying an object to be wrapped, and forming the wrapping film on both sides of the wrapping film. The packaging film is formed into a cylindrical shape by vertically sealing the ends, and the packaging film is sandwiched between a pair of heater blocks from the horizontal direction to form a bag-like package. In a vertical bag making and filling machine equipped with a function of filling the packaged object inside the body through a forming tube and transferring it downward, it moves horizontally at the position directly above the heater block and forms it at the bottom of the package. And a folding member for folding the horizontal seal portion to the bottom surface side of the package.

Since the folding member folds the horizontal seal portion at a position immediately above the heater block, the folding operation can be performed immediately after the horizontal sealing operation. Can be formed. Moreover, the operation of the heater block is simplified by assigning the folding member to the folding of the horizontal seal portion,
It is possible to realize a high-speed vertical bag making and filling machine.

Preferably, the folding member is moved laterally by the power transmission means in conjunction with the opening / closing operation of the heater block. Thereby, it is not necessary to add a power source for driving the folding member, and the operation timing between the heater block and the folding member can be surely matched.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram showing the entire configuration of a vertical bag making and filling machine according to an embodiment of the present invention.

As shown in FIG. 1, the vertical bag making and filling machine according to this embodiment includes a forming tube 1 for forming a packaging film F into a cylindrical shape, and is drawn out from a winding drum (not shown). Stripped packaging film F
Is transported downward by the feeding belt 3 while being wound in a tubular shape around the outer peripheral surface of the forming tube 1, and the packaging film F wound around the forming tube 1 is vertically sealed using a vertical heater block 4. Mold into a shape.

Subsequently, the cylindrically formed packaging film F is fed out below the forming tube 1, and is sandwiched from the lateral direction by a pair of lateral heater blocks 5A and 5B to form a laterally sealed package 10, thereby forming a bag-like package 10. After doing
An object to be packaged is filled into the package 10 via the forming tube 1. When the packaging film F is horizontally sealed, the bottom folding plate 6 is inserted into the lower part of the side surface of the packaging body 10 (see FIG. 13), so that the bottom of the packaging body 10 is formed to have a flat bottom.

Further, the vertical bag making and filling machine according to this embodiment moves in the horizontal direction at a position directly above the horizontal heater block 5A to form a horizontal seal portion 12 formed on the bottom of the package 10.
A folding member 100 for folding the package, intermediate cooling means 200 for cooling the bottom 11 of the package 10 transferred downward from the horizontal sealing position by the horizontal heater blocks 5A and 5B, and transporting the package 10 which has fallen. A flat-bottom forming apparatus including the conveying means 300 is provided.

FIGS. 2 to 6 are views for explaining the folding member 100 and the components provided around it.
(A) of each figure is a plan view, (b) is a schematic front view. First, the folding member 100 and its peripheral structure will be described with reference to FIG. Each horizontal heater block 5A, 5B
Opposite to each other, they are fixed to the block supports 7A and 7B, respectively. The block supports 7A and 7B are movable in the left and right directions in the drawing to open and close the horizontal heater blocks 5A and 5B, respectively.

A folding holder 101 is mounted on the upper surface of one of the block supports 7A (hereinafter referred to as left block support 7A). A guide rod 102 extends. These folding guide rods 10
2, a folding member main body 104 is slidably supported via a guide bush 103. The folding member body 104 is constantly urged leftward in the figure via an urging member such as a coil spring (not shown).

At the center of the folding member main body 104, a plate-like folding member 100 is mounted via a support shaft 105 shown in FIG. 2B, and this folding member 100 is integrated with the folding member main body 104. It is freely movable in the left and right directions in the figure. As shown in FIG. 2B, the folding member 100 is disposed at a position directly above the horizontal heater block 5A, and moves along the upper surface of the horizontal heater block 5A.

The folding member 100 includes a support shaft 105.
And a cam roller 106 for rotation is provided at both ends on the rear side. On the main body of the vertical bag making and filling machine, a fixed cam 107 for rotation is arranged on a moving path of the cam roller 106 for rotation (see FIG. 2B). The rotating cam roller 106 provided on the folding member 100 is engaged with the rotating fixed cam 107 and moves counterclockwise in FIG. Further, latch pins 108 are provided at both ends of the folding member main body 104.
Is provided.

A latch member 111 is rotatably mounted on the other block support 7B (hereinafter referred to as right block support 7B) via a support shaft 110. The latch member 111 has a claw 111a at its tip and is constantly urged in the direction a (closed direction) by an urging member such as a coil spring (not shown). An opening / closing cam roller 112 is provided at the base end of the latch member 111. On the other hand, the main body of the vertical bag making and filling machine has a fixed cam 1 for opening and closing.
The opening / closing cam roller 112 is engaged with the opening / closing fixed cam 113. Fixed cam for opening and closing 1
In FIG. 13, a closed area 113a for maintaining the latch member 111 in a closed state and an open area 113b for maintaining the member 111 in an open state are formed (for example, FIG. 3A).
reference).

Next, the operation of the above-mentioned folding member 100 and its peripheral structure will be described. As shown in FIG.
With each heater block support 7A, 7B stopped at the open position, between each horizontal heater block 5A, 5B,
The package body 10 whose bottom is horizontally sealed comes down. Then, as shown in FIG. 3, when the package 10 is lowered to a predetermined position, the respective heater block supports 7A and 7B are moved in the direction of arrow b in the drawing, and the respective horizontal heater blocks 5 are moved.
A and 5B are closed, and the package 10 is sealed horizontally. At this time, the opening / closing cam roller 112 is
13, the latch member 111 is closed, and the claw 111a of the member 111 moves beyond the latch pin 108 to the rear position.
Here, the latch pin 108 and the claw 1 of the latch member 111
A fixed interval is left between the first and the second electrodes 11a. In addition, the bottom folding plate 6 is inserted into the lower part of the side surface of the package 10 in synchronization with the horizontal sealing operation.

When the horizontal sealing is completed, as shown in FIG. 4, each of the heater block supports 7A and 7B moves in the direction of arrow c in the drawing, and each of the horizontal heater blocks 5A and 5B.
To release. As the heater block supports 7A and 7B move, the claw 1 of the latch member 111 in the closed state is moved.
11 a engages with the latch pin 108.

Further, each heater block support 7A, 7B
As shown in FIG. 5, the folding member main body 104 is pulled by the right heater block supports 7A and 7B via the latch member 111 and the latch pin 108, and the main body 104 is moved. Moves rightward in the figure. Along with this movement, the folding member 100 bends the horizontal seal portion 12 formed on the bottom portion 11 of the package 10 toward the bottom surface. At this time, the bottom folding plate 6 inserted into the lower part of the side surface of the package 10 is
1 (see FIG. 13). This folding operation
Since it is performed immediately after the end of the horizontal sealing operation by the horizontal heater blocks 5A and 5B, the horizontal seal portion 12 softened by preheating at the time of sealing can be reliably bent.

The surface of the packaging film F constituting the packaging body 10 is coated with a hot-melt agent, and this film on the surface of the horizontal seal portion 12 is melted by heat at the time of sealing. When the horizontal seal portion 12 is bent, the melted film surface serves as an adhesive, and the horizontal seal portion 12 is attached to the bottom.

Subsequently, the turning cam roller 106 engages with the turning fixed cam 107 to turn the folding member main body 104 counterclockwise in FIG. 5B. By this rotation, the folding member 100 slightly raises the bottom of the package 10, and the bending of the horizontal seal portion 12 and the adhesion to the bottom 11 are further ensured.

Further, each heater block support 7A, 7B
As shown in FIG. 6, the opening / closing cam roller 112 engages with the open area 113b of the opening / closing fixed cam 113 to move the latch member 111 as shown in FIG.
Is opened, and the claw portion 111a of the member 111 and the latch pin 10 are opened.
8 is released. At that moment, the folding member main body 104 is retracted by being pulled leftward in the figure by urging means (not shown). A buffer member (not shown) including a hydraulic damper or the like is provided on the back surface of the folding member main body 104, so that the collision with the fixed holder due to the retreat operation of the folding member main body 104 is reduced. At this time, the bottom folding plate 6 also comes out from the lower side of the package 10.

Next, the intermediate cooling means 200 for cooling the bottom of the package 10 will be described. 7 to 10 are diagrams for explaining the intermediate cooling means 200. FIG. As shown in FIG. 8, the intermediate cooling means 200 is
The bottom 11 of the package 10 transferred downward from the horizontal sealing position by A and 5B is cooled. This intermediate cooling means 2
00 is provided with a cooling block 201 having a chevron-shaped surface. The cooling block 201 is moved to a transfer position at the bottom of the package 10 to cool the bottom of the package 10 (see FIG. 8), and the cooling block 201 is packaged. It is configured to retreat from the transfer position of the body bottom 11 (see FIG. 7).

That is, in the main body of the vertical bag making and filling machine,
A slider 202 that can move vertically along a guide rail (not shown) is provided, and a mounting arm 204 of the cooling block 201 is fixed to the slider 202 via a rotatable support shaft 203. One end of a link member 205 is also fixed to the support shaft 203.
The other end of 5 is connected to a drive rod of an air cylinder 206 disposed on the main body of the vertical bag making and filling machine.

The driving force of the air cylinder 206 is transmitted to the support shaft 203 via the link member 205, and rotates the mounting arm 204 of the cooling block 201 together with the support shaft 203. By this rotation, the cooling block 201 moves to the transfer position of the package body bottom 11 and retreats from the same position.

The main body of the vertical bag making and filling machine is provided with a rotatable support shaft 210, and an elevating arm 211 is fixed to the support shaft 210. This lifting arm 2
The tip of 11 is engaged with the slider 202. An arm member 213 for supporting the elevating cam roller 212 is fixed to the support shaft 210 to which the elevating arm 211 is fixed. The arm member 213 and the elevating arm 211 are fixed.
Rotates integrally with the support shaft 210.

An elevating cam block 2 having an oblique cam groove 214 formed on the lower surface of the right block support 7B.
The lifting cam roller 212 is engaged with the cam groove 214.

Next, the operation of the above-described intermediate cooling means 200 will be described. As shown in FIG. 7, when the bag making / filling / packaging operation in the previous cycle is completed and the sealed package 10 is dropped downward, the air cylinder 206 is operated, and the mounting arm 204 of the cooling block 201 is moved. Rotate counterclockwise as shown.

By this rotation, the cooling block 201 moves to the transfer position of the horizontally sealed package bottom 11 (see FIG. 8). At this position, the cooling block 201 comes into contact with the bottom 11 of the package 10 that has descended, and cools the bottom 11.

Next, each of the heater block supports 7A, 7
B moves in the direction of the arrow b in the drawing to close the horizontal heater blocks 5A and 5B, and the horizontal sealing of the package 10 is performed (see FIG. 9). The horizontal seal seals the upper end of the package 10 at the lowered position. At this time, the package 10 is pulled by each of the horizontal heater blocks 5A and 5B and the bottom 11 rises slightly. Therefore, when the cooling block 201 is stationary at the position of FIG. The cooling action is lost by separating from the base 201.

Therefore, in this embodiment, the elevating cam block 215 is moved in the direction of the arrow b in the figure integrally with the right heater block support 7B. Along with this movement, the elevating cam roller 212 slightly moves up along the cam groove 214, and rotates the arm member 213 and the elevating arm 211 clockwise in the drawing. As a result, the slider 202 is lifted, so that the cooling block 201 slightly rises from the position shown in FIG. 8 to maintain the state of contact with the package body bottom portion 11 and maintain the cooling action.

Thereafter, the air cylinder is operated to rotate the mounting arm 204 of the cooling block 201 in the counterclockwise direction in the drawing to retract the cooling block 201. Note that one of the heater blocks 5A or 5B has a built-in cutter at the center, and cuts the horizontal seal portion 12 of the package 10 at an intermediate portion. Therefore, each horizontal heater block 5A,
As soon as 5B is opened, the package 10 placed at the lowered position falls. As described above, during the lowering of the package 10 (that is, during the packaging cycle), the package bottom 11
Is cooled, so that the folded horizontal seal portion 12 can be prevented from returning.

Next, the transporting means 300 for transporting the dropped package 10 will be described. FIG. 11 is a front sectional view of the conveying means 300, and FIG.
FIG. 3 is a sectional view taken along line A. Below the horizontal heater blocks 5A and 5B, a conveying means 300 for conveying the package 10 is provided. The transport means 300 includes a table 301 on which the package 10 is placed. A transport air cylinder 302 is mounted on one end of the table 301. The drive rod of the transfer air cylinder 302 includes a support block 3.
A guide rod 304 extends from both sides of the support block 303. Each guide rod 3
A pusher 306 is slidably mounted on 04 via a bush 305. On both sides of the support block 303, an opening / closing air cylinder 307 for driving the bush 305 along the guide rod 304 is mounted.

When the package 10 falls on the front of the table 301, the air cylinder 302 for conveyance is driven to push the pusher 306 leftward in FIG.
0 is conveyed in the same direction. At this time, the pusher 306
As shown by a solid line in FIG. 12, the package 10 on the table 301 is arranged at a closed position where the package 10 can be pressed.

When the operation of transporting the package 10 is completed, the opening / closing air cylinder 307 is operated, and the pusher 306 is moved to a position retracted from the transport path of the package 10 as shown by a virtual line in FIG. In this state, the transfer air cylinder 3
02 is driven to move the pusher 306 backward to the right in FIG. When operating the vertical bag making and filling machine at high speed,
It is conceivable that the next package 10 falls onto the table 301 before one cycle of the transport operation by the pusher 306 ends. However, according to the transporting means 300 of this embodiment, since the pusher 306 retreats at the position retracted from the transport path of the package 10, there is no possibility that the pusher 306 will interfere with the package 10 that has dropped next.

Further, the transport means 300 of the present embodiment
A cooling medium flow path 310 (cooling means) is formed inside the table 301, and the cooling medium flowing through the flow path 310 absorbs preheating remaining in the package body bottom 11, and quickly forms the package body bottom 11. Cooling is realized.

According to the flat bottom forming apparatus of the vertical bag making and filling machine according to the present invention described above, as shown in FIG. 14 (b), the horizontal seal portion 12 (formed on the bottom 11 of the flat bottom package 10). Flap) can be reliably bent and adhered to the bottom portion 11 to form a flat bottom shape. A vertical seal portion 13 is formed on one side surface of the flat bottom package 10 by the vertical heater block 4. With respect to the side surface on which the vertical seal portion 13 is formed, it can be arbitrarily set to which side the horizontal seal portion 12 of the bottom portion 11 is bent, that is, whether it is bent to the vertical seal portion side or to the opposite side. .

[0043]

As described above, according to the present invention, since the folding member folds the horizontal seal portion just above the heater block, the folding operation can be performed immediately after the horizontal sealing operation. Then, the horizontal seal portion can be bent to the bottom surface side to form a flat bottom surface. Moreover, the operation of the heater block is simplified by having the folding member handle the folding of the horizontal seal portion, and it is possible to realize a high-speed vertical bag making and filling machine.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing the entire configuration of a vertical bag making, filling and packaging machine according to an embodiment of the present invention.

FIGS. 2A and 2B are diagrams for explaining a folding member and components provided around the folding member, wherein FIG. 2A is a plan view and FIG. 2B is a schematic front view.

3A and 3B are diagrams showing the operation of the folding member following FIG. 2, wherein FIG. 3A is a plan view and FIG. 3B is a schematic front view. .

4A and 4B are diagrams showing the operation of the folding member following FIG. 3, wherein FIG. 4A is a plan view and FIG. 4B is a schematic front view.

5A and 5B are diagrams showing the operation of the folding member continued from FIG. 4, wherein FIG. 5A is a plan view and FIG. 5B is a schematic front view.

6A and 6B are diagrams showing the operation of the folding member continued from FIG. 5, wherein FIG. 6A is a plan view and FIG. 6B is a schematic front view.

FIG. 7 is a diagram for explaining an intermediate cooling unit.

FIG. 8 is a view showing the operation of the intermediate cooling means following FIG. 7;

FIG. 9 is a view showing the operation of the intermediate cooling means following FIG. 8;

FIG. 10 is a view showing the operation of the intermediate cooling means following FIG. 9;

FIG. 11 is a front sectional view of a conveying unit.

FIG. 12 is a sectional view taken along line AA in FIG. 11;

FIG. 13 is a perspective view showing the operation of the bottom folding plate and the folding member with respect to the package.

FIG. 14 is a perspective view showing the appearance of a flat bottom packaging container.

FIG. 15 is a perspective view showing a general structure of a vertical bag making and filling machine.

[Explanation of symbols]

1: forming tube 4: vertical heater block 5A, 5B: horizontal heater block 6: bottom folding plate 7A, 7B: block support 10: package 11: bottom 12: horizontal sealing portion 100: folding member 200: intermediate cooling means 201 : Cooling block 300: transport means 301: table 310: flow path (cooling means)

Claims (5)

[Claims] 1. A band-shaped wrapping film is wrapped around an outer peripheral surface of a forming tube for supplying an article to be packaged, and both side ends of the wrapping film are vertically sealed to form the wrapping film into a cylindrical shape. At the same time, the packaging film is sandwiched between a pair of heater blocks in the lateral direction and laterally sealed to form a bag-like packaging body, and the inside of the packaging body is filled with the packaged object through the forming tube, and In a vertical type bag making and filling machine having a function of transferring to a horizontal position, a horizontal seal portion formed at the bottom of the package is bent to the bottom side of the package by moving laterally at a position directly above the heater block. A flat bottom forming device comprising a folding member. 2. A flat bottom forming apparatus for a vertical bag making and filling machine according to claim 1, further comprising a power transmission means for moving said folding member in a horizontal direction in conjunction with an opening and closing operation of said heater block. Characterized flat bottom forming device. 3. The flat bottom forming apparatus of a vertical bag making and filling machine according to claim 1, wherein the intermediate cooling means cools a bottom of the package which has been transferred downward from a horizontal sealing position by the heater block. A flat-bottom forming apparatus comprising: 4. The flat bottom forming apparatus for a vertical bag making / filling and packaging machine according to claim 3, wherein the intermediate cooling means has a cooling block, and moves the cooling block to a transfer position of the package bottom. A flat-bottom forming apparatus comprising a structure for cooling a bottom of a package and retracting the cooling block from a transfer position of the bottom of the package. 5. The flat-bottom forming apparatus for a vertical bag making and filling machine according to claim 1, further comprising: a conveying means for conveying a package below the heater block; A flat-bottom forming apparatus, wherein a cooling means for cooling the bottom of the package is provided in the conveying means.