JP3139589B2 - Vertical sealing mechanism in bag making and packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical sealing mechanism in a bag making and packaging machine.

[0002]

2. Description of the Related Art A thermoplastic band-shaped packaging material is transported along a peripheral surface of a filling cylinder while being bent into a cylindrical shape by a homer.
The vertical edges overlapped during this time are sealed by a heater for vertical sealing, and a portion that hits the top of the bag and a portion that hits the ground of the next bag by a heater for horizontal sealing arranged below the filling cylinder. A bag-making and packaging machine that seals simultaneously, that is, a packaging machine called a vertical pillow packaging machine, usually uses a belt-type vertical sealing mechanism to continuously fill and pack contents. It is constituted so that it may be performed.

[0003] This type of packaging machine is provided with a function of forming various kinds of bags having different sizes according to the contents and the filling amount. Since it is necessary to be able to paste, every time the bag to be formed changes, it is necessary to remove the vertical seal belt to replace the filling cylinder or adjust the position of the belt, etc. In particular, when the number of lots of bags is small, there is a problem that much time is required for these operations and the operation rate of the apparatus is significantly reduced.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
An object of the present invention is to provide a new vertical sealing mechanism of a bag making and packaging machine that can easily and quickly respond to the specifications and sizes of bags to be made.

[0005]

That is, the present invention provides a vertical sealing mechanism in a bag making and packaging machine for achieving the above object, in which one end of the filling cylinder is swingably mounted on a machine frame so as to open a front surface of the filling cylinder. Means for moving the vertical seal member in the axial direction of the filling cylinder via a support member so as to correspond to the loaded filling cylinder to the pivotally supported arm member, and pressing and separating the vertical seal member from the packaging material s. Means are provided, respectively, while the support member is provided with means for moving and adjusting the vertical seal member in the tangential direction of the filling cylinder and means for tilting with respect to the axis of the filling cylinder.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The drawings show one embodiment of the present invention,
In the drawing, reference numeral 1 denotes a vertical sealing mechanism which is disposed on the side of the filling cylinder 30 and which fuses the vertical edges of the packaging material s bent into a cylindrical shape by the former 33. The vertical sealing mechanism 1 is a machine. A swing arm 2 pivotally supported by a frame 31 is slidably attached to the front and rear.

This will be described in more detail.
In addition, a swing arm 2 that supports a vertical seal mechanism 1 is swingably supported by a fulcrum pin 3 that is inserted in a direction parallel to the axis of the filling cylinder 30, and is provided in the longitudinal direction of the arm 2. A z-shaped support block 5 that supports the vertical seal unit 20 is slidably mounted in the guide groove 4.

On the other hand, the swing arm 2 is provided with a size-dependent position changing motor 6 which rotates according to the diameter of the filling cylinder 30, and a screw shaft 7 of the motor 6
A support base 8 for supporting a heater contact / separation cylinder 9 is screwed, and the support block 5 is driven by a size-dependent position changing motor 6 to be positioned in the axial direction according to the diameter of the filling cylinder 30. It is configured to be adjusted and to be displaced so as to separate the seal heater 28 and the packaging material s when the apparatus is stopped by being driven by the heater contact / separation cylinder 9. The support block 5 also has, at its tip, a holding portion 1 for changing the contact angle of the seal heater 28.
1, a sleeve 13 that supports a spline shaft 14 slidably in the axial direction is laterally clamped and held by bolts 12.

The spline shaft 14 is provided with a head 15 for supporting the unit at the end thereof, and a fulcrum pin 16 inserted through the head 15 has a unit base 21 extending in the axial direction of the filling cylinder 30. Are supported via a U-shaped bracket 22.

A knob 17 for changing the seal position is screwed to the end of the spline shaft 14, and a spring 18 is interposed between the sleeve 4 and the head 14. The vertical seal unit 2 supporting the spline shaft 14 by moving the spline shaft 14 forward and backward
0 is correctly set to the sealing position.

On the other hand, one end of the unit base 21 is
As shown in the figure, a belt driving motor 23 is mounted on the back surface thereof, and a pulley 25 coupled to a shaft of the driving motor 23 via a coupling 24 and a rotatable rotation at the other end of the unit base 21. A seal belt 27 is stretched between the driven pulley 26 and the driven pulley 26, and a seal heater 28 is mounted between the pulleys 25 and 26. By transmitting heat to the packaging material s, the vertical edges of the overlapping packaging material s are sealed. In the drawing, reference numeral 29 denotes a heater supporting bolt, and 32 denotes a hopper.

In the apparatus configured as described above, first, a packaging material roll and a filling cylinder 30 corresponding to a bag to be formed are loaded, and then the size and the like of the bag are designated on an operation panel. The motor 6 rotates in response to the specified signal, and moves the heater block 11 on the support base 8 via the screw shaft 7 and the support block 5 connected to the rod 10 to a position corresponding to the diameter of the filling cylinder 30. Position to.

On the other hand, the heater contact / separation cylinder 9 keeps a standby state by extending the rod 10 to separate the vertical seal unit 20 on the support block 5 from the packaging material s. When the operation is started, the support block 5 is pulled in the direction of the arrow Y in the drawing at the stage where the packaging material s has been sent to the vertical sealing mechanism 1 along the filling cylinder 30, and the seal heater at the tip of the vertical sealing unit 20 is drawn. 28 is pressed against the vertical edge of the overlapping packaging material s to perform the required heat welding action, and when the device stops operating, the support block 5 is moved in the direction indicated by the arrow Y and the sealing is performed. The heater 28 is separated from the packaging material s to prevent the melting accident thereof.

On the other hand, when a bag whose vertical seal is shifted from the position A on the center line to the position B on the center line is formed depending on the specification, the knob 17 provided at the end of the sleeve 13 is turned to rotate the spline shaft 14. In order to align the seal heater 28 at the front end with the new vertical seal position B, the seal heater 28 is displaced in the direction of arrow X in the figure, that is, in the tangential direction of the filling cylinder 30, to the position indicated by the two-dot chain line in FIG.

On the other hand, if the material of the packaging material s becomes slack at the upper end of the vertical sealing position, the bolt 12 provided on the contact angle changing hugging portion 11 of the support block 5 is loosened. The sleeve 13 is slightly rotated in the counterclockwise direction in FIG.
0 is also rotated in the counterclockwise direction in FIG.
The belt 27 on the side is slightly raised from the surface of the packaging material s, and the pressing force on the packaging material s is gradually increased in the feeding direction so as to minimize the occurrence of bending.

By the way, when the packing operation of the required number of lots is completed and the filling cylinder 30 needs to be replaced to form a bag of a different size, the lock mechanism (not shown) is released. Then, the swing arm 2 is pivoted largely counterclockwise in the drawing with the fulcrum pin 3 as a fulcrum, and the front surface of the filling cylinder 30 is released to facilitate the attaching / detaching operation.

[0017]

As described above, according to the present invention, the arm member for supporting the vertical seal member is pivotally supported so as to be largely separated from the filling cylinder, and the arm member is provided with the vertical seal member. Means for moving and adjusting the member according to the diameter of the filling cylinder and means for moving the vertical sealing member to and away from the packaging material are provided, making it easy to replace the filling cylinder according to the size of the bag to be molded. In addition to this, it is possible to position the vertical seal member in accordance with the cylinder, and furthermore, when the operation of the device is stopped, the vertical seal member is separated from the packaging material to prevent accidents such as melting. it can.

In addition, a means for moving the vertical seal member in the tangential direction of the filling cylinder and a means for tilting the longitudinal seal member with respect to the axis of the filling cylinder are provided on the member for supporting the vertical sealing member. It is possible to provide an appropriate vertical seal corresponding to the vertical seal position of the bag and the material of the packaging material.

[Brief description of the drawings]

FIG. 1 is a plan view of an apparatus showing one embodiment of the present invention.

FIG. 2 is a side view of the same device.

FIG. 3 is a perspective view of the same device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vertical seal mechanism 2 swing arm 3 fulcrum pin 5 support block 6 motor for changing position by size 9 cylinder for heater contact / separation 11 fastening part for changing contact angle 13 sleeve 14 spline shaft 17 knob for changing seal position 20 vertical seal unit 27 Vertical seal belt 28 Seal heater 30 Filling cylinder s Packaging material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65B 51/10 B65B 51/26 B65B 43/04 B65B 9/20

Claims (1)

(57) [Claims] 1. A vertical sealing member is attached to an arm member pivotally supported at one end to a machine frame to open a front surface of a filling cylinder via a supporting member to correspond to the loaded cylinder. Means for moving and adjusting in the axial direction;
Means for press-contacting and separating the vertical sealing member from the packaging material s, respectively, are provided. On the supporting member, means for moving and adjusting the vertical sealing member in the tangential direction of the filling cylinder; A vertical sealing mechanism in a bag making and packaging machine provided with means for tilting with respect to the axis of a filling cylinder.