JPH0526005Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a horizontal sealing device for a container, and more specifically, the invention relates to a horizontal sealing device for containers, and more specifically, the present invention relates to a horizontal sealing device for containers, and more specifically, when a continuous tube body is filled with a filler such as drinking water, The present invention relates to a transverse sealing device for a container, in which a transverse seal is applied in a transverse direction intersecting the direction of the transverse direction, and a sealed container is formed by mutually adjacent transverse seal parts.

"Prior Art" Conventionally, this type of sealing device has a rotating body that is continuously driven to rotate, an inner mold provided at multiple locations around the rotating body, and a direction substantially parallel to the rotational direction of the rotating body. a swinging member that is swingably connected to the inner mold or rotating body with the rotation center at the center of rotation; an outer mold and a horizontal seal member that are sequentially provided on the swinging member from the front side to the rear side in the rotational direction; A driving means for swinging the member to move the outer mold to an opposing position facing the inner mold and an open position separated from the opposing position, and filling the inside with a filling material when the outer mold is in the open position. Supply the tube body into the inner mold,
Further, the tube body is held between the outer mold and the inner mold located at opposing positions, and the tube body is horizontally sealed in a direction intersecting the conveyance direction by the horizontal seal member. What has been done is known.

In this type of lateral sealing device, when the outer mold and the lateral sealing member are integrally provided on the swinging member, the swinging member rotates within the above-mentioned inner part with the rotation center being approximately parallel to the direction of rotation of the rotating body. Since they are swingably connected to the mold or the rotating body, the outer mold and the horizontal seal member are pressed into contact with the inner mold while drawing an arc. Therefore, the sealing surface of the horizontal sealing member is brought into pressure contact with the sealing surface of the inner mold so that it gradually becomes parallel to the sealing surface of the inner mold from an inclined state.

As a result, the tube body, which is sandwiched and sealed between the pair of horizontal seal members, is pushed out toward the open side of the horizontal seal members in the process where the sealing surfaces change from an inclined state to parallel, and the tube body Depending on conditions such as the material of the filler and the contents of the filler, the seal may be incomplete.

In order to improve such drawbacks, conventionally, the outer mold and the horizontal seal member are movably provided on the swinging member, and when the outer mold and the horizontal seal member are located at the opposing positions, they and the inner mold It is proposed that the outer mold and the horizontal seal member, which are opposed to the inner mold with a required spacing, are arranged to face each other with a required spacing, and are provided with a pressing means that presses the outer mold and the horizontal seal member, which face the inner mold with a required spacing, toward the inner mold almost parallel to each other. (Japanese Unexamined Patent Publication No. 62-28324).

According to such a horizontal sealing device, the outer mold and the horizontal sealing member are pressed substantially parallel to each other toward the inner molding, so that the tube body is not pushed out toward the open side of the horizontal sealing member, as in the former horizontal sealing device. It is possible to provide a relatively good horizontal seal without any problems.

``Problem to be solved by the invention'' However, since the tube body expands from the last horizontal seal part into a flat conical shape and becomes a cylindrical shape, when pressing the outer mold and the horizontal seal member toward the inner mold, In this case, the amount of pressure deformation of the tube body is greatest at the portion of the horizontal seal member on the rear side in the conveyance direction. Since the horizontal seal was applied at the part where the amount of pressure deformation was the largest, when the tube body was press deformed, the front side and the back side of the tube body were placed either in the left or right direction with respect to the deformation direction. As a result, it has been difficult to stably and accurately bond the front side and the back side at predetermined positions.

"Means for Solving the Problem" In view of such circumstances, the present invention consists of the above-mentioned outer mold consisting of a first outer mold on the front side in the direction of rotation and a second outer mold on the rear side, and the first outer mold is The second outer mold and the horizontal seal member are integrally provided on the swinging member, and the second outer mold and the horizontal seal member are movably attached to the swinging member, and the second outer mold and the horizontal seal member are mounted on the swinging member so as to be movable. A pressing means is provided for pressing the sealing member substantially parallel to the inner mold.

"Operation" According to the above structure, by positioning the first outer mold provided on the swinging member at the opposing position, the first outer mold gradually becomes parallel to the inner mold from an inclined state. Since it is brought close to the inner mold while being rotated, a light twisting force in a certain direction can be applied to the tube body by the rotation, and at the same time,
The amount of expansion of the tube body behind the first outer mold can be reduced. The above twisting force is the first
This can be achieved by adjusting the amount of pressing deformation of the tube body by the outer mold, that is, by setting the length of the first outer mold in the rotational direction to an appropriate length.

When the first outer mold is located at the opposing position to reduce the amount of expansion of the tube body following it, the second outer mold and the horizontal seal member are moved substantially parallel to the inner mold. Becomes under pressure. At this time, since the amount of pressure deformation of the tube body is reduced by the first outer mold and a light twisting force in a certain direction is applied to the tube body, the tube body is moved in a certain direction. It is now possible to press and deform in a stable state,
Therefore, it becomes possible to provide a more stable lateral seal than in the past.

"Example" The present invention will be explained below with reference to the illustrated example.
In FIG. 1, the horizontal sealing device according to the present invention is
It is equipped with a rotating shaft 1 arranged in the horizontal direction and a rotating body 2 attached to the rotating shaft 1.
is continuously driven to rotate by a drive motor (not shown).

Inner molds 3 are arranged at regular intervals on the outer circumference of the rotating body 2.
As shown in FIG. 3, a swinging member is provided on one side of each inner mold 3 via a shaft 4 disposed in a direction substantially parallel to the rotational direction of the rotating body 2. 5 are rotatably connected. The swinging member 5 is moved around the shaft 4 by a driving means 6, which will be described in detail later, into an opposing position facing the inner mold 3 (the position indicated by the solid line in FIG. 3) and an open position (a third
It is designed so that it can be swung to the position shown by the imaginary line in the figure.

As shown in FIGS. 2 to 4, the inner mold 3 has a flat support surface 10 that supports the radially inner portion of the tube body 7, and a pair of left and right support members 11 that support both sides of the flat support surface 10. , an inclined surface 12 extending diagonally outward in the radial direction from the rear side in the rotational direction of the support surface 10, and a horizontal seal member 13 disposed further behind the inclined surface 12 with its surface facing outward in the radial direction.
It is equipped with

Therefore, the support surface 10, the support member 11, and the inclined surface 12 form a recess 14 whose front side in the rotational direction is open, and the tube body 7 can be accommodated therein. The tube body 7 is made of a material coated with a thermoplastic film, and is filled with a liquid or a filler such as powder or granules.

The swinging member 5 is provided with a first outer mold 17, a second outer mold 18, and a horizontal seal member 19 in that order from the front side in the rotational direction to the rear side, and the first outer mold 17 located at the front in the rotational direction is provided integrally with the swinging member 5. When the swinging member 5 is located at the opposing position, the first outer mold 17 is located at a height that corresponds to the upper surface of the support member 11,
Moreover, the first outer mold 17 can cover approximately the front half of the recess 14.

Further, the second outer mold 18 and the horizontal seal member 19 are each fixed to a movable frame 20, and the movable frame 20 connects the swinging member 5 to the front side of the rotating body 2 in the rotational direction via a shaft 21. It is pivoted so that it can swing. And this movable frame 20 is
A torque spring 22 wound around the shaft 21 normally positions the swinging member 5 at a distance, and from this state a pressing means 23 (described in detail later)
As a result, the second
The inner mold 3 together with the outer mold 18 and the horizontal seal member 19
, thereby making it possible to press both lateral seal members 13 and 19 parallel to each other.

A heater (not shown) is incorporated in at least one of the horizontal seal members 13 and 19, and when the tube body 7 is held between both the horizontal seal members 13 and 19, the heat of the heater The clamping portion of the tube body 7 is glued so that a lateral seal can be applied to that portion.

Furthermore, when the horizontal seal member 19 is pressed against the horizontal seal member 13, the second outer mold 18 is located close to and at the same height as the first outer mold 17,
Moreover, the rear half of the recess 14 is covered. Further, the groove sealing member 19 is formed with an inclined surface 24 that faces the inclined surface 12 of the inner mold 3 and is inclined in the opposite direction.

In this embodiment, the driving means 6 for swinging the swinging member 5 about the shaft 4 includes a cam follower 30 provided on one side of each swinging member 5 and a torsion guide with which each cam follower 30 engages. It is composed of a groove 31. The torsion guide groove 31 is formed in an annular shape as a whole along the outer periphery of the rotating body 2 and is fixed therein. This non-twisted portion allows the swinging member 5 and the first outer mold 17 to be positioned at opposing positions facing the inner mold 3.

On the other hand, the remaining upper half of the torsion guide groove 31 is a twisted part that is twisted around the shaft 4 from the direction along the outer circumference of the rotating body 2, and this twisted part allows the swinging member 5 and the second outer The mold 18 can be placed in an open position separated from the inner mold 3 (see imaginary line in FIG. 3).

Furthermore, the second outer die 18 positioned at the above-mentioned opposing position
The pressing means 23 for pressing the second outer mold 1 against the inner mold 3 is
8, and a pressing cam member 33 with which the cam follower 32 engages. The pressing cam member 33 is disposed and fixed over substantially the entire range in which the non-twisted portion is formed, so that when the cam follower 32 engages with the pressing cam member 33, the second outer die 18 can be pressed against the inner die 3.

In the above configuration, as shown in FIG. 19 is located in the open position away from the inner mold 3, that is, the inner mold 3
It is inserted between the opening position in the lateral direction with respect to the rotational direction from the opposing position.

When the swinging member 5 is swung to the opposing position by the driving means 6 as the rotating body 2 rotates, the first outer mold 17 provided on the swiveling member 5 first moves into the recess of the inner mold 3. The tube body 7 is now pushed into the tube 14. At this time, the surface of the first outer mold 17 is
Since the tube body 7 is brought closer to the support surface 10 constituting the tube body 7 from an inclined state to gradually become parallel to the support surface 10, a light twisting force is applied to the tube body 7.

By the way, since the tube body 7 expands into a flat conical shape and becomes a columnar shape from the last preceding horizontal seal portion 7a, it is necessary to set the length of the first outer mold 17 in the rotational direction to an appropriate length. Accordingly, the first outer mold 1
The amount of pressing deformation of the tube body 7 by the tube body 7 can be set appropriately, and therefore, the above-mentioned twisting force can be set to a suitable magnitude.

Note that at this time, the second outer mold 18 and the horizontal seal member 19 provided on the movable frame 20 are urged in a direction away from the inner mold 3 by the torque spring 22, so that they are pressed against the tube body 7. are prevented from coming into contact with.

Next, in this state, the second outer mold 18 and the horizontal seal member 19 are pressed toward the inner mold 3 by the pressing cam member 33 of the pressing means 23, and the tube body 7 is pressed by both the horizontal seal members 13 and 19. It is clamped and sealed horizontally. At this time, the horizontal seal member 19 is pressed in parallel with the horizontal seal member 13, and the amount of pressure deformation of the tube body 7 by the horizontal seal member 19 is due to the pressure deformation of the tube body 7 by the first outer mold 17. There are relatively fewer people.

In addition, since a light twisting force in a certain direction is applied to the tube body 7 by the first outer mold 17, when the tube body 7 is pressed and deformed by the horizontal seal member 19, In this case, it is sufficient to deform the tube body 7 by a relatively small amount while keeping it stable in a certain direction. Therefore, it becomes easy to accurately bond the front side and the back side of the tube body 7 at predetermined positions, and it becomes possible to provide a more stable horizontal seal than in the past.

Furthermore, when the horizontal sealing member 19 clamps the tube member 7, the second outer mold 18 also comes to be in the normal position, and the tube member 7 is molded into almost the required shape. will be done.

Since the tube body 7 is held between the horizontal seal members 13 and 19 while the second outer mold 18 passes through the pressing cam member 33, a reliable horizontal seal is provided between them, and the tube body 7 is adjacent to each other. A sealed container containing a filling material is formed between the pair of horizontal seal parts. After this, the swinging member 5 is driven by the drive means 6.
is rotated and the first outer mold 17 etc. are separated from the inner mold 3, the tube body 7 with the horizontal seal applied is carried out from inside the recess 14 of the inner mold 3, and then cut by a cutting device (not shown). The middle portion of each transverse seal is cut to allow separation into individual containers.

Note that instead of providing the above-mentioned torsion guide groove 31,
The rotating body 2 may be provided with a cylinder device or the like that swings the swinging member 5, and similarly, instead of providing the pressing cam member 33, the second outer mold 18 is pressed against each swinging member 5. A cylinder device or the like may be provided.

Further, in the above embodiment, the second outer mold 18 is provided on the swinging member 5 so as to be swingable about the shaft 21, but it is of course possible to move the second outer mold 18 back and forth in a straight line. The lower part of the moving member 5 may be pivotally supported by the rotating body 2.

Furthermore, the second outer mold 18 and the horizontal seal member 19 are made separate members, and the first outer mold 17 and the second outer mold 1
After pressing and deforming the tube body 7 in order with 8 and 8,
The tube body 7 may be held between the horizontal seal members 19.

"Effects of the Invention" As described above, according to the present invention, it is possible to obtain a more stable horizontal seal than in the past.

[Brief explanation of the drawing]

Fig. 1 is an overall front view showing one embodiment of the present invention, Fig. 2 is an enlarged view of the main parts of Fig. 1, Fig. 3 is a right side view of Fig. 2, and Fig. 4 is a view of Fig. 2. It is a sectional view along the - line of. 1...Rotating shaft, 2...Rotating body, 3...Inner mold, 1
3, 19... Horizontal seal member, 5... Swinging member, 6
...Driving means, 7...Tube body, 7a...Horizontal seal portion, 17...First outer mold, 18...Second outer mold,
20...Movable frame, 23...Press means, 3
0, 32...Cam follower, 31...Torsion guide groove, 33...Press cam member.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotating body that is driven to rotate continuously, an inner mold provided at multiple locations around the rotating body, and the inner mold with the center of rotation approximately parallel to the direction of rotation of the rotating body. a swinging member swingably connected to the mold or the rotating body;
An outer mold and a horizontal seal member are provided on this swinging member in order from the front side to the rear side in the rotational direction, and further, an opposing position where the swinging member is swung so that the outer mold faces the inner mold, and this opposing position. and a driving means for moving the tube body filled with the filler into the inner mold in the open position of the outer mold, and a driving means for moving the tube body filled with the filler inside the inner mold to the inner mold located at the opposite position. In the lateral sealing device for a container, the tube body is held between the molds and the tube body is horizontally sealed in a direction perpendicular to the transport direction by the horizontal sealing member, It is composed of a first outer mold on the front side in the rotational direction and a second outer mold on the rear side, the first outer mold is integrally provided on the swinging member, and the second outer mold and the horizontal seal member are attached to the swinging member. A pressing means is provided that is movably attached and presses the second outer mold and the horizontal seal member toward the inner mold substantially in parallel with the first outer mold located at the opposing position. Horizontal sealing device for containers.