JPS60123309A - Film molding device - 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 Technical Field The present invention relates to a film forming apparatus for forming a packaging film into a cylindrical shape. A former used in a bag-forming-fill-sealing machine that seals the bag after filling the bag with articles, the former being configured so that the opening diameter of the cylindrical bag formed by the former can be adjusted steplessly. It is.

Conventional technology Vertical pillow packaging machine, horizontal pillow packaging machine, etc. A colored film is formed into a cylindrical bag, various articles are filled into the bag, and then three-sided sealing and four-sided sealing are applied to automatically package the articles. A film forming machine called a former is generally used in a bag making, filling and packaging machine that performs packaging. This film forming machine is used to form packaging film unwound from a roll of raw material into a cylindrical bag, and various structures have been proposed in the past regarding its mechanism. . This film forming machine is generally a fixed type in which the diameter of the bag formed by the machine cannot be changed, and when the diameter of the packaging bag is changed in the bag making, filling and packaging machine. According to the dimensions of the desired cylindrical packaging bag, molding tools of various sizes prepared in advance can be used as appropriate. However, replacing this film forming tool requires extremely complicated work, and the operation of the bag-forming-fill-sealing machine must be temporarily stopped for the replacement work, which causes a decrease in work efficiency.

Therefore, in view of the need to change the dimensions of cylindrical packaging bags according to various factors such as the shape, dimensions, and capacity of the packaged items, we developed a system that allows for variable adjustment of the bag-making width. Several proposals have already been made regarding film forming machines that enable the production of packaging bags. For example, Jikko Sho 53-5069
In Publication No. 7, as a proposed "film forming machine", an overhanging part having an opening is provided on the main body of an automatic packaging machine, and 1. A film forming machine with mold fittings is attached, and the gap between the backs of the pair of film forming machines can be adjusted by loosening and moving the first screw of the mold fitting, and any bag making width can be set. The technical idea behind this is disclosed. However, with the device according to this invention, the range of opening width that can be adjusted is small, and the structure is extremely complicated and operation is troublesome, so it is actually difficult to manufacture cylindrical packaging bags of arbitrary dimensions. Have difficulty.

Further, in Japanese Utility Model Application Publication No. 55-66906, a cylindrical forming tool 2 is formed by combining two half-cylinder divided bodies 21 and 22.
0, and this divided body 21.22 is pol h 24a,
24b and nuts 25a, 25b, a technical idea is disclosed in which the spacing can be adjusted.

However, in this invention, a chute 4 which also serves as a forming cylinder is fitted into the inner periphery of the forming tool 2o, and the chute 1-
Since the outer circumferential dimension of No. 4 is fixed, it must be said that the range of variable adjustment of the bag making width is extremely limited, as in the above invention.

Purpose The present invention was devised to solve the above-mentioned drawbacks inherent in formers used in bag-forming-fill-sealing machines and the like according to the prior art. The opening diameter of the packaging bag consists of the shape of the contents,
It is an object of the present invention to provide a novel film forming apparatus that can manufacture cylindrical packages with stable shapes and various opening sizes by freely adjusting the filling amount and other user needs.

Solution: In order to achieve the above object, a film forming apparatus according to the present invention fixes and holds one end of an elastic plate made of a long material with high flexibility, and loops the plate obliquely upward from the fixed part as a starting end. The other end of the return side crosses the front of the fixed part and extends diagonally downward, and is attached to the advancing and retracting mechanism, and as the advancing and retracting mechanism moves forward and backward, Freely converge/converge formed loops
The fact that it is configured so that it can expand is considered a vj sign.

EXAMPLES Next, the film forming apparatus according to the present invention will be described in detail by way of preferred examples with reference to the accompanying drawings. FIG. 1 is a partially cutaway front view showing a schematic structure of a film forming apparatus according to the present invention, FIG. 2 is a plan view showing the overall structure of the apparatus according to the present invention, and FIG. 3 is a side view of the apparatus according to the present invention. It is a diagram. In the figure, reference numeral 1o indicates a long elastic plate material with high flexibility, such as a stainless steel plate, and this plate material 1o
One end of the support member 14 is fixed via a bolt 16 on the fixed side of a support member 14 which is relatively movably arranged on the rectangular frame 12 shown in FIG. It is attached to the forward and backward movement mechanism 18 shown so that it can move forward and backward. That is, as shown in FIGS. 1 and 2, one end of the long elastic plate 1o is attached to a fixed member 22 having a predetermined shape attached to the support member 14 via a support shaft 2o of a guide roller, which will be described later. On the other hand, it is fixedly held via the bolt 16. The other end of the plate material 10 starts from the side fixedly held by the fixing member 22, and extends obliquely upward as shown in FIG. It extends in a clockwise loop with an inclination and returns toward the fixed portion. The return end crosses the front of the fixed part without contact, then extends diagonally downward, and connects to a sliding piece 52 provided in the advance/retreat mechanism 18 (described later) via the bolt 26. installed. Note that the support member 14 is moved under the action of a relative movement mechanism to be described later.
Within the rectangular frame 12, it can be moved relatively close to or separated from another support member 28.

Furthermore, since the advancing/retracting mechanism 18 is attached to this support member I4, this advancing/retracting mechanism 18 will be explained first. As shown in FIGS. 1 and 4, the elastic plate 1 extends clockwise in a loop and then returns.
As described above, the other end of the elastic plate 10 crosses the front of the fixing member 22 without contacting it and extends diagonally downward. In this embodiment, this is guided and supported by three guide rollers. That is, a support plate 32 of an appropriate shape is attached to an extension portion 30 integrally extending from the support member 14 via bolts 34, and a plurality of support shafts 20 are fixed to this support plate 32 with bolts. ing. This support shaft 2
As shown in FIG. 1 and FIG.
6c is rotatably attached, two guide rollers 36a and 36b guide and hold the upper end surface of the elastic plate 10 in the longitudinal direction, and the guide roller 36c supports the elastic plate 10.
The elastic plate member 10 is slidably held by a plurality of guide roller groups while guiding and supporting the lower end surface of the elastic plate member 10 in the longitudinal direction. As shown in FIG. 4, the fixing member 22 is attached to the other end of the support shaft 20.

The support plate 32 is arranged so as to extend diagonally downward with respect to the support member 14, and the advance/retreat mechanism 18 is attached to an end thereof. This advancing/retracting mechanism has a configuration as shown in FIGS. 1 and 4, and includes a pair of support blocks 38 to 40, a screw shaft 46, and a sliding piece 52 screwed onto the screw shaft 46. and a handle 50. That is, a pair of support blocks 38 and 40 are fixed to one side of the support plate 32 by bolts 42 and 44 at a predetermined interval S, and a screw shaft 46 is attached to the one support block 38.
A shank portion 48 is rotatably inserted therethrough. Further, the open end of the screw shaft 46 is rotatably inserted into and supported by the other support block 40 . A shank portion 48 inserted through the support block 38 projects outward, and a handle 50 is fixed to this projection.

A sliding piece 52 is inserted and screwed into the threaded portion of the screw shaft 46 interposed between the pair of support blocks 38, 4.0, and the handle 5o can be rotated in any direction. This allows the sliding top 52 to move forward and backward along the screw shaft 46 in the directions of arrows A and B. In order to prevent the sliding top 52 from rotating and to guide its smooth sliding, a guide bar 54 made of a round bar is inserted and fixed into the surface support blocks 38 and 40. It is freely inserted and supported. As shown in FIG. 4, this sliding top 52 has
The other end of the elastic plate 1o is fixed via a bolt 56. Therefore, the handle 5 provided on the advancing/retracting mechanism 18
If the sliding top 52 is moved forward and backward in the direction of the arrow by rotating 0, the elastic plate 1o whose other end is fixed to the sliding top 52 is moved forward in the direction of the arrow in FIG. It will be understood that if the loop is converged in the direction of contraction and conversely retreated in the direction of arrow B, the loop will expand in the direction of increasing its diameter.

Next, in FIG. 2, the first and second support members 14
．． A mechanism for relatively moving 28 will be explained. This relative movement mechanism is provided so that when the elastic plate material 10 converges and expands as described later in the film forming apparatus, a substantially uniform circular loop is formed without moving its center point. In this embodiment, a pair of screw shafts 5B and 60 each having a reverse thread are rotatably inserted and supported at both ends in the longitudinal direction of the rectangular frame 12, and one screw shaft 60 is inserted from the frame 12. A handle 62 is fixed to the protruding end of the handle, and a bevel gear 64 is fixed to the other end. A bevel gear 66 is also fixed to the other end of the other threaded shaft 58 that protrudes outside the frame, and these bevel gears 64 and 66 are shafts that are rotatably inserted into two bearings 68 and 68 that are attached to the frame 12. As shown, they mesh with bevel gears 72 and 74 provided at both ends of the supported rotating shaft 70, respectively. and the pair of screw shafts 58
Guide nuts 76 and 78 are screwed onto the guide nanos 1-76 and 78, respectively, and the support member 28 is fixed to these guide nuts 76 and 78. Further, one screw shaft 58 has the support member 1
The supporting member 14 and the supporting member 28 are slidably inserted and guided through a guide bar 80 which is inserted and screwed into the guide bar 80 and which is commonly inserted and fixed to the frame 12. The threading direction of the screw shaft 58 screwed onto the support member 14 and the threading direction of the portion onto which the support member 28 is screwed are set in opposite directions. Therefore, the second
In the figure, when the handle 62 is rotated in a predetermined direction, the screw shafts 58 and 60 connected by bevel gears are rotated in opposite directions, and thereby the support members 14 and 28 are moved relatively closer to each other or separated. become.

Next, as shown in FIG. 3, the support member 28 is provided with a height-adjustable holding member 82, and the rear lower end of the elastic member 10 is inserted into a slit-like groove formed in the holding member 82. It is adapted to be slidably latched. That is, an upright base 84 is fixed to the support member 28 via bolts 86, as shown in FIGS. 2 and 3, and projects vertically from the support member. And this upright base 8
A holding member 82 having the shape shown in FIG. 82 is held at the desired height, and the pole]-
An arbitrary height can be set by loosening the handle 90 and moving the holding member 82 up and down. As described above, a slit-shaped groove is bored at the tip of this holding member 82, and the lower end surface of the elastic plate 10 falls into this groove, allowing the plate 10 to slide freely and stably into a predetermined position. It is designed to be held at a certain height.

Note that in FIGS. 2 and 3, reference numeral 92 indicates a roller. This roller 92 has the function of contacting and guiding a band-shaped film 94 coming from a film supply source (not shown) and smoothly feeding the film 94 into a loop-shaped film forming machine formed by the elastic plate 10.

Functions and Effects Next, the functions and effects of the film forming apparatus according to the present invention will be explained. In FIG. 2, the diameter of the film forming device formed by the loop of the elastic plate material 10 is 130 mm.
Assume that there are +n+n. If a cylindrical film packaging bag with an opening diameter of 90 mm is required depending on various requirements such as the shape of the packaged item and the filling capacity,
The operator will follow the operating procedure below. First, the handle 5o provided on the advancing/retracting mechanism 18 shown in FIGS. 1 and 4
is rotated in a predetermined direction to rotate the screw shaft 46 connected thereto, and the sliding top 52 is moved along the guide bar 54 in the direction of arrow A.
move forward in a direction. As a result, Pol 1 is placed on the sliding top 52.
The elastic plate 10 attached through ~56 is also shown by arrow A.
One end of the elastic plate 1o is fixedly held by the fixing member 22, and the lower end of the loop formed by the elastic plate 1o is connected to the holding member 8.
2, as the sliding top 52 moves forward in the direction of arrow A, the elastic plate 10 gradually converges and its diameter decreases.

When the diameter of the loop in the planar state reaches 90 mm, the rotation operation of the handle 50 is stopped. As a result, the dimensions of the film forming machine made of the elastic plate material 10 are set such that a cylindrical film packaging bag having a desired opening diameter can be formed.

By the way, since the distance between the fixing member 22 that fixes and holds one end of the elastic plate 10 and the support member 28 to which the holding member 82 that guides and holds the lower end surface of the loop is attached is constant, If the handle 50 is only rotated, the convergent loop obtained as shown in FIG.
It takes on an elliptical shape with the long axis as its long axis, and is no longer able to maintain a nearly perfect circle. Therefore, the pan provided in the relative movement mechanism mentioned above. By rotating the dollar 62 and rotating the threaded shaft 58.60 having a reverse thread, the pair of support members 14 and 28 are moved relatively closer to each other, and the long axis in the X-axis direction is moved. The rotation may be adjusted so that it substantially coincides with the short axis in the y-axis direction. At this time, as shown in FIG. 2, point C, which is approximately at the center of the loop formed by the elastic plate material 10, is at the branch points Q and C1 where the reverse threads are threaded, respectively, on the double threaded shafts 58 and 60. By setting the center point C to be located on a straight line connecting the loops, the center point C of the loop will not shift even if the support members 14 and 28 are relatively approached or separated.

Conversely, the loop diameter in the initial setting state is 130 m.
If it is desired to obtain an opening diameter of a cylindrical film packaging bag larger than m, for example 150 mm, the above-mentioned operation may be reversed. In other words, the handle 5 provided on the advancing/retracting mechanism 18
0 in the direction in which the sliding top 52 retreats in the direction of arrow B, the other end of the elastic plate 10 attached to the sliding top 52 is pushed back and gradually expands the loop. This will increase the diameter. Then, the handle operation may be stopped at the position where the diameter reaches the desired 150 mm. At this time, the loop is y in FIG.
It will be formed into an ellipse with the long axis being the axis. Therefore, by rotating the handle 62 provided on the relative movement mechanism to separate both the support members 14.28, a nearly perfect circle is formed in which the short axis in the x@force direction substantially coincides with the long axis in the y-axis direction. can be obtained. In this case as well, the center point of the loop formed by the elastic plate material 0 hardly moves for the same reason as mentioned above, which is preferable.

A film 94 is supplied via the roller 92 to a film forming machine made of the elastic plate material 10 formed into a loop of a desired diameter, and is fed into the film forming machine as shown in FIGS. 3 and 1. As a result of the squeezing, a packaging bag of the desired diameter will be produced. Note that the degree of the diameter of the loop and the film 9 fed through the roller 92
It is preferable that the height of the holding member 82 is set to the most appropriate value depending on the approach angle of No. 4.

As explained in detail above, according to the film forming apparatus according to the present invention, one end of the elastic plate made of a long material with high flexibility is fixed, the elastic plate is wound in a loop shape, and the other end is moved forward and backward. By connecting the loop to the film forming machine and operating the advancing/retracting mechanism, the loop can be converged and expanded to arbitrarily set its diameter within a predetermined range. The opening diameter of the cylindrical film packaging bag can be set arbitrarily.

Moreover, the diameter of this film forming tool can be easily changed, and it is possible to easily change the diameter of this film forming tool.
'18 Even IU replacement work is not required, and the time required to interrupt the 8ml+ bag-forming-fill-sealing machine is short, which can significantly improve work efficiency.

Although the case where a stainless steel plate is used as the elastic plate material has been described, various other materials can be suitably used as long as they are flexible and elastic and have the same effect. As long as it satisfies the above requirements, even a plate made of synthetic resin can be used satisfactorily. In addition, although we have explained an example in which the advance/retreat mechanism is operated by rotating the handle, it can also be operated in forward and reverse directions! The advancing and retracting mechanism may be operated using a hydraulic power source, pneumatic source, or other electric motor as an actuator.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing a schematic structure of a film forming apparatus according to the present invention, FIG. 2 is a plan view showing the overall structure of the apparatus according to the present invention, and FIG. 3 is a side view of the apparatus according to the present invention. figure,
FIG. 4 is a plan view of the advancing/retracting mechanism suitably used in the device according to the present invention, viewed from the direction of line N-IV in FIG. 1. 10...Elastic plate material 18...Advancing/retracting mechanism patent applicant Fuji Machinery Co., Ltd.

Claims (1)

[Claims] One end of an elastic plate made of a long material with high flexibility is fixed and held, and the plate is extended diagonally upward in a loop from the fixed part as the starting end, and then returned, and the other end on the return side. The portion is configured to intersect in front of the fixed portion and extend diagonally downward so that it can be accessed by the advancing and retracting mechanism, and the loop formed in the plate material can be freely converged and expanded by the advancing and retracting movement of the advancing and retracting mechanism. A film forming device characterized by the following.