JPH0140807Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a packaging adhesive device suitable for use in medical packaging, food packaging, liquid-filled packaging, and the like.

[Prior Art] Conventionally, as a packaging adhesive device, as shown in FIG. 4, a pair of upper and lower heat-sealable seal bars 1A,
Straight engaging portions 2A, 2B on each of 1B
are provided, and the meshing portion 2A of both seal bars 1A, 1B,
2B are interlocked with each other, and the overlapped portions of a plurality of heat-sealable plastic sheets are pressed between the meshing portions 2A and 2B to heat-seal them.

[Problems to be solved by the invention] However, since the packaging adhesive device described above repeatedly moves the upper and lower seal bars 1A and 1B facing each other or rotates, the movable parts may wear out due to long-term use. As a result, the upper and lower meshing parts 2A and 2B are shifted from each other, and the meshing parts 2
It becomes difficult for A and 2B to mesh reliably and smoothly,
Seal failure may occur. Therefore, in the packaging adhesive device, periodic maintenance and inspection of movable parts and the like is required in order to prevent seal failures from occurring due to the causes described above.

The present invention aims to make it possible to always form a perfect seal under conditions that reduce maintenance and inspection work.

[Means for Solving the Problems] The present invention provides a pair of upper and lower heat-sealable seal bars each with an engaging portion, and when the engaging portions of both seal bars are engaged with each other, a plurality of seal bars are In a packaging adhesive device that heat-seals the overlapping portions of heat-sealable sheets by pressing them between the interlocking portions,
An upper engaging portion is provided at each end of the upper seal bar, a lower engaging portion is provided at each end of the lower seal bar, and the upper engaging portion and the upper engaging portion are provided at each end of the lower seal bar before the engaging portions of both seal bars engage. The lower engaging portion is engaged, and the engaging portions of both seal bars can be engaged in a fixed position under a state in which both engaging portions are engaged.

Examples of heat-sealable seal bars include heat silver and high-frequency seal bars.

[Operation] According to the present invention, the upper and lower seal bars are in a state in which the engaging portions provided on the seal bars engage with each other and the engaging portions of the seal bars are aligned at appropriate relative positions. This makes it possible to always ensure that these meshing portions mesh in a fixed position. Therefore, even if the operating parts that move the upper and lower seal bars oppositely or rotationally become worn out due to long-term use, the upper and lower engaging parts can be reliably and smoothly engaged to maintain a perfect seal at all times. It is possible to form. That is, it is possible to always form a perfect seal under conditions that reduce maintenance and inspection work.

[Example] FIG. 1 shows an adhesive device 10 according to an example of the present invention.
FIG. 2 is a side view showing the upper and lower heat seal bars, and FIG. 3 is a perspective view showing the upper and lower heat seal bars, with the arrow direction indicating the longitudinal direction of the seal bars.

The bonding device 10 includes an upper base 12A and a lower base 12B above and below a frame 11. Upper base 12
A is connected to the frame 1 via the lifting cylinder device 13.
1, the lower base 12B is suspended from the frame 11
is directly fixed to. That is, the upper base 1
2A is raised and lowered by the operation of the raising and lowering cylinder device 13, and can repeatedly move in opposition to or rotate relative to the lower base 12B.

FIG. 5 shows an example in which the upper base 12A and the lower base 12B rotate in the A direction and the B direction, respectively, about their rotation centers C1 and C2 shown in FIG. 1, respectively. In the example shown in Fig. 5, each of the upper and lower bases 1
Upper and lower heat seal bars 14A, 1, which will be described later, are installed at four positions in the circumferential direction of 2A, 12B, respectively.
4B is provided. In Figure 5, P1, P2
is a plastic sheet.

The upper base 12A has an upper heat seal bar 14A.
is retained. Upper heat seal bar 14A
In the holes 15A provided at both outermost ends,
A support bolt 16A integrated with the upper base 12A is inserted loosely and can be supported by a head 17A of the support bolt 16A. Also, the support bolt 16 between the upper base 12A and the upper heat seal bar 14A is
A compression spring 18A is interposed around A.
That is, the support bolt 16A and the compression spring 18A constitute floating means, and the upper heat seal bar 14A can be floated with respect to the upper base 12A, that is, in the opposing movement direction of the upper base 12A and the lower base 12B, and It is held so as to be relatively movable in either direction orthogonal to the direction of opposing movement or in the direction of rotational movement.

A lower heat seal bar 14B is attached to the lower base 12B.
is retained. Lower heat seal bar 14B
Loosely insert the support bolts 16B, which are integrated with the lower base 12B, into the holes 15B provided at both outermost ends,
It can be supported by the head 17B of the support bolt 16B. Further, a compression spring 18B is interposed around the support bolt 16B between the lower base 12B and the lower heat seal bar 14B. That is, the support bolt 16B and the compression spring 18B constitute floating means, and the lower heat seal bar 14B can be floated relative to the lower base 12B, that is, the upper base 1
The lower base 12A and the lower base 12B are held so as to be relatively movable in either direction of opposing movement, a direction orthogonal to the opposing movement direction, or a rotational movement direction.

The upper and lower heat seal bars 14A, 14B incorporate heating means such as an electric heater (not shown), and are provided with engaging portions 19A, 19B, respectively. As shown in FIGS. 2 and 3, both of the engaging portions 19A and 19B have a straight shape in which the uneven portions are continuous in the longitudinal direction.

That is, the upper and lower heat seal bars 14A, 1
4B is connected to each of the upper base 12A and lower base 12B, which move toward each other or rotate, through floating means, and the upper base 12A and the lower base 1
Along with the opposing movement or rotational movement with 2B,
The meshing portions 19A and 19B can be brought into and out of contact with each other. As a result, each meshing portion 19A, 19B of the upper and lower heat seal bars 14A, 14B,
For example, two heat-sealable plastic sheets constituting the packaging container are pressed together at their overlapping portions in a mutually meshed state to be heat-sealable.

In addition, both heat seal bars 14A, 14B are
After the compression springs 18A and 18B are deflected and deformed as the meshing parts 19A and 19B start to mesh, they are supported in contact with the back support parts 20A and 20B provided on the corresponding bases 12A and 12B. It is possible to strongly engage the meshing parts 19A and 19B.

Thus, the upper heat seal bar 14A is provided with a concave upper engaging portion 21A at each of its both ends, and the lower heat seal bar 14B is provided with a convex lower engaging portion 21B at each of its both ends. It is being Both engaging portions 21A and 21B are connected to the engaging portion 1.
Compared to the uneven state of the heat seal bars 9A and 19B, the heat seal bars 14A and 14B are largely retracted or protruded in the direction of contact and separation. As a result, the adhesive device 1
0, both the engaging portions 21A, 19B are engaged with each other before the engaging portions 19A, 19B start engaging with each other when the upper base 12A and the lower base 12B move toward each other or rotate.
21B are engaged with each other, and both engaging portions 21A, 21B are engaged with each other.
This makes it possible to engage both the engaging portions 19A and 19B in a proper fixed position under a state in which they engage.

According to the above embodiment, the upper and lower heat seal bars 14A, 14B are
Engagement parts 21A, 21 provided in A, 14B
B are engaged with each other and the heat seal bars 1
With the engaging parts 19A, 19B of 4A, 14B aligned at appropriate relative positions, it is possible to always reliably engage the engaging parts 19A, 19B in a fixed position.

Therefore, the upper and lower heat seal bars 14A,
Even if the movable parts that move 14B oppositely or rotationally are worn out due to long-term use, the upper and lower engaging parts 19A and 19B can be reliably and smoothly engaged to always form a perfect seal. . That is, according to the adhesive device 10, it is possible to always form a perfect seal on the packaging container under conditions that reduce maintenance and inspection work.

Further, in the above embodiment, each of the heat seal bars 14A, 14B is connected to the corresponding base 12A, 12B via the floating means, so that when the bases 12A, 12B move toward each other or rotate, both of the heat seal bars 14A, 14B It is possible to easily start engaging the engaging portions 21A and 21B.

The engaging portion of the present invention may be a combination of a pin-like engaging portion and a hole-like engaging portion.

In addition, as another example, a sealing property test was conducted using the same apparatus as in the previous example except that a seal bar for high frequency welding was used instead of the heat seal bar, and similar effects were observed.

[Effects of the invention] As described above, the present invention provides a pair of upper and lower heat-sealable seal bars each with an engaging portion, and when the engaging portions of both seal bars are engaged with each other,
In a packaging adhesive device that heat-seals the overlapping parts of heat-sealable sheets by pressing them between their engaging parts, an upper engaging part is provided at each end of the upper seal bar, and an upper engaging part is provided at each end of the upper seal bar. A lower engaging portion is provided at each of both ends, and the upper engaging portion and the lower engaging portion are engaged before the engaging portions of both seal bars are engaged, and under a state in which both engaging portions are engaged. The meshing portions of both seal bars can be meshed in a fixed position. Therefore, it is possible to always form a perfect seal on the packaging container under conditions that reduce maintenance and inspection work.

Further, in the present invention, both the seal bars are connected to the upper base and the lower base, which move toward each other, via floating means such as springs. Therefore, it is possible to easily start engaging the two engaging portions.

[Brief explanation of drawings]

FIG. 1 is a side view showing an adhesive device according to an embodiment of the present invention, FIG. 2 is a side view showing upper and lower heat seal bars, FIG. 3 is a perspective view showing upper and lower heat seal bars, and FIG. 4 5 is a front view showing a conventional heat seal bar, and FIG. 5 is a schematic diagram showing a modification of the bonding device. 10... Adhesive device, 12A... Upper base, 12B
...Lower base, 14A...Upper heat seal bar, 1
4B...Lower heat seal bar, 16A, 16B...
...Support bolt, 18A, 18B...Compression spring, 1
9A, 19B...meshing part, 21A...upper engagement part,
21B...Lower engagement part.

Claims (1)

[Claims for Utility Model Registration] (1) A sheet that can be heat-sealed by providing an engaging portion in each of a pair of upper and lower seal bars that can be heat-sealed, and in a state in which the meshing portions of both seal bars are engaged with each other. In a packaging adhesive device that presses and heat-seals the overlapping parts of the upper seal bar between the engaging parts, an upper engaging part is provided at each end of the upper seal bar, and a lower engaging part is provided at each end of the lower seal bar. An engaging portion is provided, and the upper engaging portion and the lower engaging portion are engaged before the engaging portions of both seal bars are engaged, and both seal bars are engaged in a state in which both engaging portions are engaged. A packaging adhesive device characterized in that parts can be interlocked at fixed positions. (2) The above-mentioned seal bars each have an upper base and a lower base that move toward each other or rotate.
The packaging adhesive device according to claim 1, which is bonded via floating means. (3) The packaging adhesive device according to claim 2, wherein the floating means includes a spring.