JP4115565B2 - Packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging machine, and more particularly to a packaging machine that can form a large-sized package without hindrance.
[0002]
[Prior art]
The packaging machine disclosed in Japanese Patent Application Laid-Open No. 9-175514 by the present applicant is deformed to the tip ends of a pair of swivel arms by moving the pair of swivel arms inward and moving these support shafts closer to and away from each other. A D-shaped trajectory is drawn, and a lateral seal is applied while squeezing the packaging material bent into a cylindrical shape by a lateral seal jaw or squeaker plate provided in this part. It is excellent in that it can be applied to various packages by changing the turning speed or the timing of approaching / separating of the support shaft according to the size of the package to be packaged, the material of the packaging material or the package.
[0003]
However, on the other hand, this type of packaging machine has a structure in which the swivel arm is rotated to perform horizontal sealing, so that the size of the bag is extremely large, for example, a package called “restaurant size”. When making, the swivel arms that have finished the horizontal seal come into contact with the lower end of the package that has descended in the process of retreating and swiveling away from each other, causing jamming or the like in the packaging material at this part. Inconvenience occurs.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of such problems, and the object of the present invention is to make it possible to deal with this type of large-sized package without any trouble without making any changes to the packaging machine itself. It is to provide a new packaging machine.
[0005]
[Means for Solving the Problems]
That is, the present invention achieves such a problem by wrapping a pair of swivel arms carrying a transverse seal jaw so that the transverse seal jaw has a substantially D-shaped trajectory and is formed into a cylindrical shape. In the packaging machine of the type that horizontally seals , the descent speed of the packaging material during the period in which the swivel arm pivots away from the lateral seal end position is the area of the squeezing operation and lateral seal processing according to the bag size to be formed control means for slower than the lowering speed of the packaging material in provided, also the rotation speed of the rotary arm at the period of the turning in the detaching direction the swivel arm from the transverse sealing end position, depending on the to be formed bag size was ironing provided control means for faster than the rotation speed of the rotary arm in the area of operation and the transverse sealing processing, with the pivot arm on the bottom of the packaging material which the packaging material is filled is prevented from contact with Than is.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Therefore, examples of the present invention will be described below.
FIG. 1 shows a first embodiment of the present invention.
[0007]
In the figure, reference numeral 1 denotes a pair of swivel arms disposed immediately below the pull-down belt 7. The swivel arms 1 rotate while being driven by the drive motor 3 at a speed according to a preset program, and these The horizontal seal jaw 4 and the squeeze plate 5 provided on the tip end of the spindle are displaced in the approaching / separating direction at a required timing while the substantially D-shaped shaft trace set in advance is drawn on these tips. A wrapping action and a lateral seal are applied to the packaging material S that has been bent into a cylindrical shape and has been fed into the seal region.
[0008]
On the other hand, the pull-down belt 7 is rotated at a required speed by the belt drive motor 8 controlled via the motor drive means 14 and pulls the packaging material S bent in a cylindrical shape to the lateral seal portion. It is configured.
[0009]
Reference numeral 10 in the figure denotes belt control means for controlling the belt drive motor 8. This belt control means 10 receives a bag size signal from a bag size input means 11 such as a touch panel and responds from the stored data. The data storage means 12 for outputting data to the operation setting means 13, and the operation signal as shown in FIG. The belt so that the lowering speed of the wrapping material S is slower than the turning speed of the swivel arms 1 and 1 during the period of separation from the end d of the horizontal seal region to the start end e of the constant velocity region after finishing the transverse seal operation. While reducing the number of rotations of the drive motor 8, the motor driving hand increases the number of rotations of the belt drive motor 8 by the amount decelerated in the acceleration / deceleration regions de throughout the constant speed regions ef. It is constituted by the operation setting unit 13 for outputting an operation control signal 14.
[0010]
Next, the operation of the apparatus configured as described above will be described with reference to FIG.
Now, when making a large package called “restaurant size”, first, the name or code number of the package corresponding to the size is input to the data storage unit 12 by the bag size input unit 11 such as a touch panel. When the size signal is input, the data storage means 12 reads the designated data from the stored data and outputs it to the operation setting means 13.
[0011]
As a result, the belt drive motor 8 operates during the turning operation in which the swivel arms 1 and 1 finish the squeezing operation and the lateral sealing process on the packaging material S and move away from each other, that is, the swivel operation in the acceleration / deceleration regions de. The rotation speed is lowered, the lowering speed of the packaging material S is lowered to the rotation speed of the swivel arms 1 and 1 through the pull-down belts 7 and 7, and then the constant speed area after passing through the areas de In order to make up for this delay in e to a, the speed of the packaging material S is made faster than the normal speed, and the lower end of the packaging material S and the swivel arms 1 and 1 are prevented from contacting each other during one cycle of packaging material feeding. The required feeding time of the packaging material S is made constant.
[0012]
FIGS. 3 and 4 show a second embodiment of the present invention. In this embodiment, the data storage means 22 that receives the signal from the bag size input means 21 operates based on the corresponding data signal. The program operation required for the motor drive means 24 via the setting means 23, that is, as shown in FIG. 4, the swing arms 1 and 1 after passing through the sections 3c to 3d are moved from the normal angular velocity in the sections 4d to 4e. Is provided with a control circuit 20 that is operated so as to rotate at a higher angular velocity and then to rotate at an angular velocity that is smaller than the normal angular velocity in the subsequent sections 5e to 5a.
[0013]
Therefore, in this embodiment, the swivel arms 1 and 1 that have undergone the transverse sealing process are moved in the separating direction at a speed higher than usual, thereby allowing the large bottom portion of the “restaurant size” package and the swivel arms 1 and 1 to On the other hand, the time required for one rotation of the swivel arms 1 and 1 is made constant by decreasing the rotation speed correspondingly in the subsequent sections 5e to 5a.
[0014]
【The invention's effect】
According to the present invention described above, by obviating contact between the bottom of the hull Sobutsu the pivot arm, the suppress a reduction in equipment utilization to prevent jamming of the packaging material in advance at the same time, It is possible to form a package with a size exceeding the limit in a packaging machine that can form a normal-size package, and the scope of application of the apparatus can be greatly expanded.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an apparatus showing an embodiment of the present invention.
FIG. 2 is a diagram showing an operation timing of the apparatus.
FIG. 3 is a block diagram of an apparatus showing another embodiment of the present invention.
FIG. 4 is a diagram showing an operation timing of the apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Revolving arm 3 Arm drive motor 4 Horizontal seal jaw 7 Pull-down belt 8 Belt drive motors 10 and 20 Control circuit

Claims (2)

In a packaging machine in which a pair of swivel arms carrying a transverse seal jaw is pivoted to form a substantially D-shaped trajectory in the transverse seal jaw and transversely sealed into a cylindrically shaped packaging material,
The lowering speed of the packaging material during the period in which the swivel arm pivots away from the lateral seal end position is slower than the descending speed of the packaging material in the area of the ironing operation and the lateral sealing process according to the bag size to be formed. A packaging machine comprising a control means for preventing the swivel arm from contacting the bottom of the packaging material filled with the packaging material. In a packaging machine in which a pair of swivel arms carrying a transverse seal jaw is pivoted to form a substantially D-shaped trajectory in the transverse seal jaw and transversely sealed into a cylindrically shaped packaging material,
Turning speed of the rotary arm in the region of the pivot arm is a rotation speed of the rotary arm at the period of turning from the transverse sealing end position in the detaching direction, the squeezing operation in accordance with the bag size to be formed, and the transverse sealing processing A wrapping machine characterized in that a control means for speeding up the operation is provided to prevent the swivel arm from coming into contact with the bottom of the packaging material filled with the packaging material.

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