JP4384872B2 - Horizontal seal mechanism of multi-row automatic packaging machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lateral seal mechanism suitable for use in a multi-row automatic packaging machine.
[0002]
[Prior art]
Conventionally, as disclosed in, for example, Patent Documents 1 and 2, an ultrasonic seal device is an ultrasonic wave composed of a horn that causes ultrasonic vibration and an anvil (base) that receives the ultrasonic vibration of the horn. Sealing devices are known.
[0003]
[Patent Document 1]
JP 62-121040 A [Patent Document 2]
Japanese Patent Laid-Open No. 6-297608
This type of ultrasonic sealing device converts ultrasonic energy with a frequency of 20 KHz or more into mechanical vibration energy, transmits ultrasonic vibration from a resonator called a horn to the seal, and concentrates the boundary surface and stress. A strong frictional heat is generated and melted by heat, and then sealed by pressurization.
[0005]
The amplitude of the vibration is about 50 to 100 μm, and the vibration generates heat in a very short time at 2 to 30,000 times per second. Since heat is generated inside the seal portion, uniform heating can be achieved, and seals of different materials can be made. Since the welding surface vibrates ultrasonically, it can be welded while dissipating dust and contents (liquid, powder, etc.) present at the welding interface.
[0006]
And the area of a seal part can be made small (a seal part can be made linear), and the part can also be cut. Therefore, the greatest advantage is that the packaging material can be saved and the cutting machine can be omitted.
[0007]
[Problems to be solved by the invention]
When such an ultrasonic sealing device is used in a multi-row vertical automatic packaging machine (a packaging machine that automatically fills and wraps a packaging material from above), the horn and anvil can be moved up and down. It is conceivable that this also serves as the packaging material pulling means.
[0008]
However, the biggest advantage in the first place is to reduce the area of the seal, and the horn and anvil also function as a cutter that cuts the packaging material, so the packaging material can be pulled out reliably and accurately with only the horn and the anvil. There is no problem.
[0009]
Such a problem can be solved by providing a separate drawing means, but the drive system of the ultrasonic sealing device and the drive system of the drawing means must be separated, and the control system for controlling each drive system is complicated. There is a problem of becoming.
[0010]
In addition, in a multi-row vertical automatic packaging machine, the horn and anvil are directly clamped and cut from the top of the packaging material filled with the packaging material. There is a problem that the horizontal seal is uncertain due to the influence of the above, or the packaging speed is lowered.
[0011]
The present invention has been made to solve such a technical problem. The drive system of the ultrasonic sealing device and the drive system of the drawing means are not separated, and the control system for controlling each drive system can be simplified. Another object of the present invention is to provide a lateral seal mechanism of a multi-row automatic packaging machine devised so that it can be accurately and promptly performed from above a packaging material filled with an ultrasonic seal packaging material.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the horizontal sealing mechanism of the multi-row automatic packaging machine according to the present invention slits a wide raw film into a plurality of packaging films as described in claim 1 and then A forming mechanism for forming a plurality of wrapping films into a cylindrical shape, a vertical sealing mechanism for vertically sealing the formed wrapping films to form a cylindrical wrapping film, and conveying the cylindrical wrapping film downward A multi-row automatic wrapping machine comprising a horizontal sealing mechanism for separating and separating the cylindrical packaging film into a packaging bag, and a filling mechanism for filling the packaging bag with a material to be packaged. The horizontal seal mechanism includes a clamp that holds a plurality of strip-shaped packaging films and conveys them downward, and an ultrasonic shield that moves the ultrasonic horn and anvil to the position where the clamps are clamped to apply a horizontal seal. Is composed of a Le device, said clamp and ultrasonic sealing apparatus is characterized in that it is mounted on the same frame.
[0013]
In the present invention, as described in claim 2, the clamp is composed of a pair of clamp pieces, and the pair of clamp pieces pulls downward while sandwiching a plurality of cylindrical packaging films, and then a pair of clamp pieces. The clamp piece is opened to release the clamping, and the ultrasonic horn and the anvil are controlled to move to the position where the pair of clamping pieces are clamped, and the transverse sealing and cutting are performed. To do.
[0014]
According to the horizontal sealing mechanism of the multi-row automatic packaging machine according to the present invention, the clamp and the ultrasonic sealing device are mounted on the same frame. Therefore, since the clamp and the distance between the horn and the anvil constituting the ultrasonic sealing apparatus Ru structure to constant der, it can be a common driving means for the vertical movement of the frame, also a control system Can be simple.
[0015]
Furthermore, according to the horizontal sealing mechanism of the multi-row automatic packaging machine according to the present invention, the clamp composed of a pair of clamp pieces sandwiches the plurality of cylindrical packaging materials and draws the cylindrical packaging material downward. The wrapping material can be fed very smoothly, and the part of the cylindrical wrapping material sandwiched between the pair of clamp pieces, i.e. the side seal and the planned cutting site, is sandwiched again by the horn and the anvil. Since the horizontal sealing and cutting are performed by ultrasonic waves, the horizontal sealing and cutting can be performed smoothly and accurately in a stable state without being affected by the biting of the packaging material.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a horizontal sealing mechanism of a multi-row automatic packaging machine according to the present invention will be described below with reference to the drawings. FIG. 5 is a side view showing a multi-row automatic wrapping machine embodying the present invention, and FIG. 6 is a front view of the same. The multi-row automatic wrapping machine 1 includes a main body frame 1F. A hopper 2 that accommodates the material to be packaged is provided on the upper portion of the main body frame 1F. At the lower part of the hopper 2, there is provided a quantitative supply device 2 </ b> A that distributes and supplies the material to be packaged supplied from the hopper 2 to, for example, 10 supply pipes 3 arranged in parallel in a downward direction. .
[0017]
At the lower end portion of the supply pipe 3, a former 5 is provided as a forming means for forming a packaging film that is slit into a plurality of strips by slit means described later. Each former 5 is attached to the holder 6 side by side. A vertical sealer 7 is provided below the former 5. An ultrasonic sealing device 8 as a horizontal sealer is provided below the vertical sealer 7. Below the ultrasonic sealing device 8, a guide 9 and a discharging device 10 are provided for discharging the individual package 13 (see FIG. 7) cut simultaneously with the horizontal sealing by the ultrasonic sealing device 8.
[0018]
An operation panel box 11 is provided on the front left side of the main body frame 1F. The operation panel box 11 incorporates a CPU for electrically controlling the drive system of the multi-row automatic packaging machine 1. A patrol light 12 that is turned on when the operation is abnormal is provided on the upper portion of the operation panel box 11. A monitor screen 70 is attached to the front surface of the operation panel box 11.
[0019]
In FIG. 7, reference numeral FH denotes a winding roll around which a wide sheet-shaped packaging material is wound, and is pivotally supported on the side of the main body frame 1F so as to be rotatable and detachable. The packaging material F fed out from the take-up roll FH is passed over a guide roll and a tension roll and guided to a slitter FX. The slitter FX slits the packaging material F into a plurality of packaging films F ′ along the feeding direction.
[0020]
The slitter FX is comprised from the upper roller 52 provided with the some cutter blade 51, and the lower roller 53 which rolls with this upper roller. Each packaging film F ′ slit by the slitter FX is passed over two guide rolls 54 and 55 and then guided to the former 5. Each packaging film F ′ (packaging material F) is pulled out by the reciprocating vertical movement of the ultrasonic sealing device 8. This reciprocating vertical movement will be described later.
[0021]
The packaging film F ′ slit by the slitter FX is formed into a cylindrical shape by the former 5 and is formed into a bag shape by the vertical sealer 7 and the ultrasonic sealing device 8. And the to-be-packaged material is filled through the supply pipe 3 in the bag which consists of each packaging film F '.
[0022]
After the material to be packaged is filled, the opening on the bag is sealed and cut by the ultrasonic sealing device 8, separated into a plurality of individual packages 13, and discharged by the discharging device 10.
[0023]
As shown in FIG. 1, the ultrasonic sealing device 8 is built in a frame 101 as a whole. In the upper half of the frame 101 as viewed from the side, a horn 203 that is a resonance body that converts electrical energy generated from an ultrasonic oscillator into mechanical vibration energy, and the ultrasonic vibration is applied to a position facing the horn 203. A receiving anvil 202 is attached with a certain interval. The portions where the horn 203 and the anvil 202 are opposed to each other are linear.
[0024]
The horn 203 and the anvil 202 can be separated from each other along a substantially horizontal plane by air cylinders 205 and 204. The air cylinders 205 and 204 are both attached to the frame 101 as first drive means.
[0025]
In the half of the frame 101 as viewed from the side, a clamp 301 for pulling out a plurality of tubular packaging materials F ′ sandwiched between the horn 203 and the anvil 202 substantially vertically downward is positioned below the horn 203 and the anvil 202. Attached to the frame.
[0026]
As shown in FIG. 3, the clamp 301 includes a pair of clamp pieces 302 and 303. The opposing portions of the clamp pieces 302 and 303 have a linear shape with a length capable of sandwiching all (ten) of the plurality of tubular packaging materials F ′.
[0027]
An air cylinder 304 is attached to the frame 101 as a second driving means for bringing the clamp pieces 302 and 303 into contact with each other along a substantially horizontal plane. The frame 101 moves up and down at a fixed operation interval with respect to the main body frame 1F by third driving means for vertical driving such as a driving belt, a driving chain, a driving rack, or a cylinder (not shown). .
[0028]
The frame 101 repeats a series of vertical movements as shown in FIG. That is,
(1) From the stop state (origin) where the horn 203 and the anvil 202 are open and the clamp 301 is open,
(2) The clamp 301 is closed, and the tubular packaging material F ′ filled with the material to be packaged is in a closed state that sandwiches the horizontal seal and the planned cutting site. Next,
(3) Maintaining this state, the frame 101 is lowered by the vertical dimension (one pitch) of one individual package. And at the position where the descent stops,
(4) The clamp 301 releases the tubular packaging material F ′. The position where this clamping is released, that is, the place where the horizontal sealing and cutting are planned becomes the sealing position by the horn 203 and the anvil 202.
(5) The horn 203 and the anvil 202 descend to the sealing position. And
(6) The horn 203 and the anvil 202 sandwich the above-mentioned lateral seal and the scheduled cutting site of the tubular packaging material F ′, and perform ultrasonic sealing and cutting.
(7) After ultrasonic sealing, the horn 203 and the anvil 202 are further lowered by about 2 to 5 mm in order to completely cut the individual package 13. Thereby, the individual package 13 is separated (cut). This step (7) is an effective means when the material of the cylindrical packaging material F ′ has variations, and can be omitted.
(8) The sandwiched state between the horn 203 and the anvil 202 is released at the position where the individual package 13 is separated.
(9) Then, the frame 101 returns to the origin of (1). Thereafter, the same up and down movement is repeated at regular intervals according to a program stored in the CPU.
[0029]
【The invention's effect】
As described above , according to the horizontal seal mechanism of the multi-row automatic packaging machine according to the present invention, the distance between the horn, the anvil and the clamp is structurally constant, and the driving means for the vertical movement of the frame is In common, the control system can be simplified, and an excellent effect can be achieved. In addition, the lateral seal and cutting by the horn and the anvil are accurately and smoothly performed to increase the packaging speed. be able to.
[Brief description of the drawings]
FIG. 1 is a side view of a lateral seal mechanism of a multi-row automatic packaging machine according to the present invention.
FIG. 2 is a plan view of a horizontal sealing mechanism of the multi-row automatic packaging machine according to the present invention.
FIG. 3 is a plan view of a clamp of a horizontal seal mechanism of a multi-row automatic packaging machine according to the present invention.
FIG. 4 is an explanatory view showing the vertical movement of the ultrasonic sealing device according to the present invention.
FIG. 5 is a side view of a multi-row automatic packaging machine that employs a horizontal sealing mechanism according to the present invention.
FIG. 6 is a front view of the same.
FIG. 7 is a perspective view showing a slitter of a multi-row automatic packaging machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Multi-row automatic packaging machine 8 Ultrasonic sealing device 13 Individual packaging 101 Frame 202 Anvil 203 Horn 204, 205 Air cylinder (first drive means)
301 Clamps 302, 303 A pair of clamp pieces 304 Second drive means F 'Cylindrical packaging material

Claims (2)

After forming a wide raw film into a plurality of wrapping films, a forming mechanism for forming the plurality of wrapping films into a cylindrical shape, and a cylindrical packaging film by vertically sealing the formed wrapping film A vertical sealing mechanism for transporting the cylindrical packaging film downward, a lateral sealing mechanism for separating and separating the cylindrical packaging film into a packaging bag, and a packaging material in the packaging bag. A multi-row automatic packaging machine having a filling mechanism for filling,
  The lateral seal mechanism is composed of a clamp that sandwiches a plurality of strip-shaped packaging films and conveys them downward, and an ultrasonic seal device that moves the ultrasonic horn and anvil to a position sandwiched by the clamps and applies a lateral seal. And
  The horizontal sealing mechanism of a multi-row automatic packaging machine, wherein the clamp and the ultrasonic sealing device are mounted on the same frame. The clamp is composed of a pair of clamp pieces, and the pair of clamp pieces pulls downward while sandwiching a plurality of cylindrical packaging films, then opens the pair of clamp pieces to release the sandwich, and the pair 2. The horizontal seal of the multi-row automatic packaging machine according to claim 1, wherein the ultrasonic horn and the anvil are controlled to move to a position where the clamp piece is clamped and the horizontal seal is cut and cut. mechanism.

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