JPS61125A - Device for forming tearing means for unsealing to packaging bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for forming tearing means for opening a packaging bag.

Conventionally, in order to easily open a pillow-packed packaging bag, for example, a 7-shape, a U-shape, or a low-positioned linear tearing means was attached to the heat-welded bonded part (end seal part). It is proposed to form. However, with conventional opening means, it is difficult to cut the end seal in the intended direction when opening the seal, and there are problems such as the end seal being cut in an unexpected direction, spilling the contents, or damaging the seal. Ta. Therefore, as a result of repeated trial production in order to obtain a new means for easily and reliably opening the packaging bag, the applicant of the present application has found that at least one end of the pillow packaging bag has a predetermined size from the outer edge. We came up with the idea that it would be sufficient to integrally form the wide bonded part and the narrow bonded part that follows it, and provide a cut for opening in the wide bonded part, and based on this proposal we proposed a utility model. The registration application has been completed.

For example, FIG. 4 shows an embodiment of a packaging bag provided with the opening means, and FIGS. 5(b) and (a) show the packaging bag shown in FIG. FIG. 6 shows a plan view as viewed from the arrow direction, and FIG. 6 shows the VI of FIG. 5(b)
This is an enlarged view of a cross section taken along the -Vl line. In the figure, for example, a packaging bag 2 that is pillow-wrapped has a bonding portion 13 formed by bonding both longitudinal edges 12 and 12 of a cylindrical packaging material in the shape of palms together. This joined part 13 in the shape of palms is formed at a position close to the outer edge 14 of the packaging bag 2 in the longitudinal direction, and the joined part 13 is attached to the side edge of the packaging bag 2 at the joined base 15. It is designed to be folded back in the opposite direction to 14.

On the other hand, at both ends of the packaging bag 2 in the longitudinal direction, there are end bonded portions 16 and 16 in which the palm-shaped bonded portions 13 are overlapped and bonded together to the longitudinal ends of the bag body 2, respectively. It is formed. As shown in FIGS. 5(a) and 5(b), at least one end bonding portion 16 includes a palm-shaped bonding portion 13 extending from the outer edge 14 in the longitudinal direction of the packaging bag 10.
A wide bonded portion 17 of a certain size that extends across the area and a narrow bonded portion 18 that is continuous with the wide bonded portion 17 are integrally formed. An unattached portion 19 having a predetermined width is formed in the wide bonded portion 17 and extends diagonally from the outer edge 14 in the longitudinal direction of the packaging bag 2 . This unattached part 19
Discontinuous linear opening notches 20, indicated by reference numerals 20a and 20b, are formed at approximately the center of the packaging bag 2, diagonally inward from the outer edge 14 in the longitudinal direction. That is, as a part of the opening notch 20, a notch 20a is made in the longitudinal outer edge 14 of the packaging bag 2, as shown in FIG. A notch 20b is made across it. With this configuration, cutting in the lateral direction can be performed reliably and easily.

An object of the present invention is to provide an apparatus that can suitably apply the above-mentioned opening means to packaging bags, such as pillow packaging bags. That is, the device for forming an opening tearing means according to the present invention is an end sealing device for a packaging bag in which a cutting blade is disposed on one side of a pair of facing seal bodies so as to be movable forward and backward. disposing a cutting blade that moves forward and backward together with the cutting blade, and forming non-welded areas at required locations on both opposing surfaces of the pair of seal bodies;
The present invention is characterized in that the cutting blade is configured to pass through the non-welding region when the cutting blade is moved forward.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a device for forming an opening tearing means according to the present invention will be described in detail below with reference to preferred embodiments and the accompanying drawings. FIG. 1 is a front view of the apparatus according to the present invention, and FIG. 2 is a vertical sectional view taken along the line n--■ in FIG. That is, in the figure, reference numeral 30 indicates an end seal device that applies a weld seal to a predetermined position in the longitudinal direction of the packaging bag, and this device 30 is basically formed of an upper seal body 32 and a lower seal body 34 (end seal The basic structure and operating mechanism of the device itself are known). The lower seal body 34 is
It is mounted via a pair of support members 38, 38 on a lower arm 36 extending horizontally from a main body portion of the packaging device (not shown), with its sealing surface 46 oriented upward.

As shown in FIG. 2, a heater 40 is embedded in the lower seal body 34 to heat the seal body to a predetermined temperature and thermally weld the ends of the package 70. Further, a slit groove 44 of a predetermined width is formed in the sealing surface 46 to allow insertion and passage of a cutting blade 42 to be described later. Furthermore, as shown in FIGS. 3(a) and 3(b), the sealing surface 46 has a wide bonding surface 17 on the packaging bag 2 shown in FIG.
A wide seal surface 46a for forming a seal, and a narrow bonding surface 18 integrally continuous with this to form a narrow seal surface 18 on the packaging bag 2 shown in FIG.
A narrow sealing surface 46b is provided to form a narrow sealing surface 46b. A non-welding groove 48 of a predetermined width slightly inclined with respect to the slit groove 44 is bored at a predetermined position of the wide sealing surface 46a, and a cutting blade 50, which will be described later, is inserted into this groove 48 so as to be able to move forward and backward. It is now possible to do so.

In this embodiment, the non-welding groove 48 is used as a "receiver" for the cutting blade 50, but in the rotary seal mechanism described later with reference to FIG. Therefore, the term "non-weld area" is used in the claims to include any of them.

The upper seal body 32 also has a pair of buffer members 54 that house a spring mechanism in an upper arm 52 that extends horizontally from the packaging machine main body and is located directly above the lower arm 36.
．． The sealing surface 56 is mounted horizontally via the groove 4 and has its sealing surface 56 directed downward.

A heater 40 is also embedded in this upper seal body 32, and a slit groove 62 is perforated in the longitudinal direction thereof. Further, as shown in FIG. 2, a pneumatic cylinder 58 is pivotally supported on the upper arm 52 via a bracket 57 in a hanging state, and a cutting blade 42 is attached to the tip of the piston rod 60.
is fixed.

The cutting blade 42 is housed in the through slit groove 62 formed in the upper seal body 32 so as to be able to move forward and backward, and is removed from the seal surface 56 through the slit groove by biasing the cylinder 58. It is designed to be able to extend and retreat.

As shown in FIG. 3(a), the seal surface 56 of the upper seal body 32 also has the seal surface 46 of the lower seal body 34.
Similarly, the wide sealing surface 56 and the narrow sealing surface 56b
are integrally formed. Additionally, a non-welding groove 64 is similarly drilled through the lower sealing surface 46 at a position corresponding to the non-welding groove 48 bored therethrough.

1 and 2, a cutting blade 50 is fixed parallel to the cutting blade 42 at a position slightly offset from the center, and this cutting blade 50 biases the cylinder 58. The upper seal body 32 operates in synchronization with the cutting blade 42 to move forward and backward through the non-welding groove 6''4 formed through the upper seal body 32.The upper and lower seals bodies 32, 34 are close to each other,
When the seal surfaces 46, 56 are brought into contact, the cutting blade 42 enters into the slit groove 44 provided in the lower seal body 34, and the cutting blade 50 enters the non-welding groove 4 provided in the lower seal body 34.
It is designed to invade inside 8.

As shown in FIG. 7, which is a sectional view taken along the line ■-■ in FIG.
The cutting blade 42 has a length sufficient to cut the packaging bag 70 at right angles to the flow direction thereof, and the movable side attachments of the pair of buffer members 54 and 54 are formed as a pair on members 66 and 66. The cutting blade 42 is slidably inserted and held in the U-shaped groove. Note that this cutting blade 42 is provided with an intermediate member 68 having a predetermined inclined thickness.
The cutting blade 50 is attached. This intermediate member 68 has an inclination angle of the same angle, corresponding to the fact that the non-welding grooves 48 and 64 are formed with the required inclination angle relative to the slit groove 44 and 62, respectively, as shown in FIG. 3(a). It is constructed from a board material that has been given a Therefore, as shown in FIG. 8, when the non-welding groove 48 (64) is bored parallel to the slit groove 44 (62), as shown in FIG.
The intermediate member 68 inserted between the notch blade 50 and the notch blade 50 is made of a plate material with a parallel thickness and no slope. 20 is composed of notches 20a and 20b, the blade shape is made of two chevron-shaped protrusions, and the first
When forming three discontinuous opening notches 20a to 20c as shown in FIGS. 1 and 12, a blade shape consisting of three chevron-shaped protrusions is adopted.

Returning to FIGS. 1 and 2, reference numeral 70 indicates a cylindrical bag with a center seal, and this bag 70 is carried horizontally on a conveyor 72 with the packaged items stored inside. It is designed to be transported. Further, the pair of upper seal body 32 and lower seal body 34 are moved toward and away from each other by a drive mechanism (1) not shown in FIG. It is designed to be sealed.

Next, FIGS. 14 and 15 show the end seal device 30.
This shows another embodiment in which the upper seal body 3
2 and the lower seal body 34 are a so-called rotary seal mechanism rotated by a known rotation mechanism.

In this case as well, the cutting blade 42 and the cutting blade 50 are spaced apart from each other on the sealing surface of one of the upper sealing bodies 32, for example, in parallel positions. On the seal surface of the lower seal body 34, a blade holder for receiving the blade portion of the cutting blade 42 is provided as a member 7.
4 is disposed, and a non-welded zone is formed at a position corresponding to the cutting edge 50, and a blade holder is attached to the member 7 in this zone.
6 are arranged. Note that the cutting edge 5 in Fig. 14
The external shapes of the blade member 76 and the blade member 76 are schematically shown in FIG. In this case, a notch 78 is provided at the tip of the cutting blade 50.
is provided to create a discontinuous opening cut 2 when sealing the package.
0 is formed.

Note that by changing the shapes of the non-welding grooves (non-welding areas) 48.64 and the cutting blades 50 provided in the upper seal body 32 and the lower seal body 34, respectively, the shapes shown in FIGS.
Opening cuts of various shapes shown in the figures can be formed.

Next, the operation and effect of the opening tear-forming device according to the present invention configured as described above will be briefly explained. When the end seal device 30 shown in FIG. 1 is operated by a known drive mechanism (not shown), the upper and lower seal bodies 32 and 34 come close to each other and are conveyed on the conveyor 72, as shown in the trajectory of FIG. The cylindrical bag 70 that arrives is squeezed from above and below.

The end seal is applied by the thermal welding action of the sealing surfaces 46 and 56. At this time, the lower sealing surface 46 and the upper sealing surface 56 are set, for example, in the shape shown in FIG. As such, the wide bonded portion 17 and the narrow bonded portion 18 are integrally formed in a corresponding manner.

The non-welding groove 4B is provided in the wide bonded part 17 of the shell shell.
, , 64, an unbonded portion 19 of a predetermined width that is not thermally welded is formed.

Also, capturing this timing, the cylinder 58 is energized, and the cutting blade 42 and the cutting blade 50 are synchronously extended from the sealing surface 56 of the upper sealing body 32, and the slit groove provided in the sealing surface 46 of the lower sealing body 34 44 and non-welding groove 4
8 respectively. That is, when the cutting blade 42 enters the slit groove 44, the packaging bag 70 is cut at right angles to its flow direction. At this time, since the cutting blade 50 acts synchronously with the cutting blade 42, the cutting blade 50 cuts through the unbonded portion 19 of a predetermined width shown in FIG. It enters into the non-welding groove 48. That is, by this, the opening notch 20
is formed in the unbonded portion 19. Further, as shown in FIGS. 8 and 9, the slit groove 44 and the non-welding groove 48 are set parallel, and the cutting blade 42 and the cutting blade 5
By setting 0 in parallel, an opening cut 20 as shown in FIG. 10 can be obtained. Furthermore, by changing the shape of the chevron-shaped portion at the tip of the cutting blade 50, two discontinuous cuts 20 as shown in FIGS. 5 and 13 are created.
a, 20b, or three cuts 20a to 20c can be formed simultaneously as shown in FIGS. 11 and 12.

As explained in detail above, according to the device according to the present invention,
The above-mentioned opening means that can reliably and easily cut out the package can be provided at the same time as the end seal is applied to the packaging bag. Moreover, since the structure is extremely simple,
There are beneficial advantages such as lower manufacturing costs for the device.

[Brief explanation of drawings]

FIG. 1 is a front view of a device forming an opening tearing means according to the present invention, and FIG. 2 is a cross-sectional view 3 taken along the vertical line ``--'' in FIG. 1.
The figure is an explanatory diagram showing the shape of the sealing surface of the seal body used in the device of the present invention, FIG. 4 is a schematic perspective view of a pillow packaging bag, and FIG. 5 is a diagram of a packaging bag equipped with an opening means applied by the device of the present invention. Schematic diagram, FIG. 6 is a sectional view taken along the line Vl-VI in FIG. 5(b),
FIG. 7 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 8 is an explanatory diagram showing the sealing surface of a seal body according to another embodiment, and FIG. 9 is a cutting blade and a notch blade according to another embodiment. 10 to 13 are explanatory views showing opening means according to different embodiments, and FIG. 14 is a sectional view when the present invention is applied to a rotary seal mechanism. Figure 15 is the 14th
The cutting blade and its blade receiver used in the mechanism shown in the figure are schematic perspective views showing the shapes of the members. 30... End seal device 32. 34... Seal body 42... Cutting blade 48... Non-welding groove (non-welding area) 50... Cutting blade 64... Non-welding Welding groove (non-welding area) Patent applicant: Fuji Machinery Co., Ltd. FIG, I Ll. FIG, 2 FIG, 8 FIG, 10 FIG, 11 FIG, 12 FIG, 13 FIG, 14 FIG, 15

Claims (1)

[Claims] In an end sealing device for a packaging bag, in which a cutting blade is movably disposed on one side of a pair of seal bodies arranged opposite to each other, a cutting blade is disposed adjacent to the cutting blade and moves back and forth together with the cutting blade, A package characterized in that non-welded areas are formed at required locations on both opposing surfaces of the pair of seal bodies, and the cutting blade is configured to pass through the non-welded area when the cutting blade is moved forward. A device that forms tearing means for opening a bag.