JP6288771B2 - Web material intermittent feeding device - Google Patents

Description

  The present invention relates to a web material intermittent feeding device that intermittently feeds at least three web materials such as plastic films.

  When a plastic bag is manufactured using a web material, the two web materials are often overlapped and sent intermittently. For example, in the apparatus of Patent Document 1, one web material is continuously fed, guided to a slit blade, slit along a longitudinal slit line, and divided into two web materials. Thereafter, the two web materials are overlapped with each other and are intermittently fed. Therefore, when a plastic film is used as the web material, and each web material is heat-sealed and cross-cut by a heat sealing device and a cross cutter every time the web material is intermittently fed, a plastic bag can be produced from the web material.

  Furthermore, in the apparatus of Patent Document 1, two swing arms are arranged in parallel with a distance from each other and supported by a swing fulcrum. The peristaltic arms have the same length. Further, a peristaltic dancer roller is supported at the tip of each peristaltic arm, a link is provided between each peristaltic arm, each peristaltic arm is connected to each other, and a pair of parallelogram link mechanisms is constituted by both ends of the link and peristaltic fulcrums. Each swing arm swings around a swing fulcrum. The web materials are separated from each other, the separated web materials are engaged with the peristaltic dancer rollers, and the tension fluctuations of the web material are alleviated by the peristaltic dancer rollers. Therefore, when the swing dancer rollers are synchronized with each other and swing with the same swing amount, and a pattern is printed on the web material, the positional relationship between the web materials does not shift, and the pattern can be accurately matched.

  On the other hand, as described in Patent Document 2, one web material may be divided into three web materials, and the three web materials may be overlapped and sent intermittently. And a plastic bag is manufactured with the web material. Further web materials may be superimposed on each other and sent intermittently to produce a plastic bag. Therefore, when at least three web materials are intermittently fed, it is desired that the fluctuations in the tension of the web materials are accurately mitigated so that the positional relationship between the web materials does not shift.

  Accordingly, an object of the present invention is to alleviate fluctuations in the tension of the web material accurately when at least three web materials are intermittently fed, so that the positional relationship between the web materials does not shift.

Japanese Examined Patent Publication No. 61-58382 Japanese Patent No. 4466912

  According to this invention, the reference arm is supported on the reference fulcrum, the reference dancer roller is supported on the tip of the reference arm, and the reference arm swings around the reference fulcrum. Further, in the swinging direction of the reference arm, at least two secondary arms are arranged parallel to the reference arm at a distance and parallel to each other and supported by the secondary fulcrum, and each secondary arm A secondary dancer roller is supported at the tip of the. The secondary arm has the same length as the reference arm. In addition, at least two links are combined with this, and the link is provided between each secondary arm and the reference arm, each secondary arm is individually connected to the reference arm, both ends of the link, the reference fulcrum and the secondary At least two sets of parallelogram linkages are formed by the fulcrum, and each secondary arm individually follows the reference arm and swings around the secondary fulcrum. Further, the web materials are separated from each other, the separated web materials are engaged with the reference dancer roller and the secondary dancer roller, and the tension variation of the web material is alleviated by the reference dancer roller and the secondary dancer roller.

  In a preferred embodiment, a cylinder is connected to the reference arm, the cylinder acts on the reference arm, the link and the secondary arm, and tension is applied to each web material.

A is an explanatory view showing an embodiment of the present invention, B is an explanatory view showing a state in which a reference arm and a secondary arm of A are rocked, and C is an enlarged view of the reference arm and the secondary arm of A. FIG. A is an explanatory view showing another embodiment, and B is an explanatory view showing another embodiment. A is an explanatory view showing a reference example for the embodiment of FIG. 1, and B is an explanatory view showing a reference example for the embodiment of FIG.

  Examples of the present invention will be described below.

  FIG. 1 shows a web material intermittent feeding apparatus according to the present invention. This device is an accessory device of the bag making machine. In the bag making machine, as in Patent Document 2, a single web material is continuously fed, guided to a slit blade, slit along a longitudinal slit line, and then into three web materials 1. Divided. Thereafter, the three web materials 1 are overlapped with each other and fed intermittently. The web material 1 is made of a plastic film. Further, each time the web material 1 is intermittently fed, each web material 1 is heat-sealed and cross-cut by a heat sealing device and a cross cutter, and a plastic bag is manufactured by the web material 1.

  In this apparatus, the reference arm 2 is supported by the reference fulcrum 3, the reference dancer roller 4 is supported at the tip of the reference arm 2, and the reference arm 2 swings around the reference fulcrum 3. Further, in the swinging direction of the reference arm 2, the two secondary arms 5a and 5b are arranged parallel to the reference arm 2 with a space therebetween and in parallel with each other. The secondary dancer rollers 7a and 7b are supported at the tips of the secondary arms 5a and 5b. For example, the reference arm 2 swings in the vertical direction, and the secondary arms 5a and 5b are arranged on the upper side and the lower side thereof, and the secondary arms 5a and 5b are parallel to the reference arm 2 at intervals in the vertical direction. And spaced apart from each other in parallel. Further, the reference arm 2 and the secondary arms 5a and 5b are supported by the reference fulcrum 3 and the secondary fulcrums 6a and 6b, and the reference dancer roller 4 and the secondary dancer rollers 7a and 7b are supported at the tips thereof. The secondary arms 5a and 5b have the same length as the reference arm 2.

  Further, two links 8a and 8b are combined therewith, the links 8a and 8b are provided between the secondary arms 5a and 5b and the reference arm 2, and the secondary arms 5a and 5b are individually connected to the reference arm 2. The two ends of the links 8a and 8b, the reference fulcrum 3 and the secondary fulcrum 6a and 6b constitute two sets of parallelogram linkages, and each secondary arm 5a and 5b individually follows the reference arm 2. Oscillate around the secondary fulcrums 6a and 6b. In this embodiment, the pin 9 is provided between the links 8a and 8b and the secondary arms 5a and 5b, and is provided between the links 8a and 8b and the reference arm 2, and the secondary arm 5a and the reference arm 2 are provided by one link 8a. And the secondary arm 5b and the reference arm 2 are connected by the other link 8b at the close position. The link 8a has the same length L1 as the distance D1 between the secondary fulcrum 6a and the reference fulcrum 3, and both ends thereof are arranged at the same distance D2 from the reference fulcrum 3 and the secondary fulcrum 6a. The link 8b also has the same length L1 as the distance D1 between the secondary fulcrum 6b and the reference fulcrum 3, and both ends thereof are arranged at the same distance D3 from the reference fulcrum 3 and the secondary fulcrum 6b. Therefore, two sets of parallelogram link mechanisms are constituted by both ends of the links 8a and 8b, the reference fulcrum 3 and the secondary fulcrums 6a and 6b (FIG. 1C). The secondary arms 5a and 5b individually follow the reference arm 2 and swing around the secondary fulcrums 6a and 6b.

  Further, one web material is continuously fed and divided into three web materials 1, each web material 1 is guided to the guide roller 10 and separated from each other, and the separated web material 1 becomes the reference dancer roller 4 and Engages with the secondary dancer rollers 7a and 7b. Furthermore, each web material 1 passes through the guide roller 11, is superposed on each other, is intermittently fed, and is guided to the heat sealing device and the cross cutter.

  Each web material 1 is intermittently fed and temporarily stopped. When the web material 1 is temporarily stopped, each web material 1 passes through the guide roller 10 and is supplied to the reference dancer roller 4 and the secondary dancer rollers 7a and 7b. The reference arm 2 and the secondary arms 5a and 5b swing around the reference fulcrum 3 and the secondary fulcrums 6a and 6b and descend (FIG. 1B), and between the guide rollers 10 and 11, the reference dancer roller 4 and the secondary dancer roller Each web material 1 is stored by 7a and 7b, and the tension | tensile_strength fluctuation | variation is relieve | moderated. Thereafter, when each web material 1 is fed again, the reference dancer roller 4 and the secondary dancer rollers 7a and 7b are pulled up by the web material 1, and the reference arm 2 and the secondary arms 5a and 5b are moved to the reference fulcrum 3 and the secondary fulcrum 6a, Swing around 6b and ascend (Figure 1A). Accordingly, the stored web material 1 passes through the guide roller 11 and is supplied to the heat seal device and the cross cutter, and the tension fluctuation of the web material 1 is alleviated by the reference dancer roller 4 and the secondary dancer rollers 7a and 7b.

  Further, in this embodiment, a cylinder 12 is connected to the reference arm 2, and the cylinder 12 acts on the reference arm 2, the links 8a and 8b and the secondary arms 5a and 5b, and tension is applied to each web material 1. The cylinder 12 is an air cylinder.

  In the case of this device, two sets of parallelogram link mechanisms are constituted by both ends of the links 8a and 8b, the reference fulcrum 3 and the secondary fulcrums 6a and 6b. Therefore, when the reference dancer roller 4 and the secondary dancer rollers 7a and 7b are synchronized with each other, and are oscillated with the same swinging amount, and a pattern is printed on the web material 1, there is no deviation in the positional relationship between the web materials 1. Can be matched exactly.

  Further, in the case of this apparatus, the links 8a and 8b are provided between the secondary arms 5a and 5b and the reference arm 2, and the secondary arms 5a and 5b are individually connected to the reference arm 2 and individually connected to the reference arm 2. And swing around the secondary fulcrum 6a, 6b. As a result, the reference arm 2 and the secondary arms 5a and 5b can be smoothly swung and the tension fluctuation of the web material 1 can be mitigated accurately.

  FIG. 2 shows another embodiment. In this embodiment, for example, one web material is continuously fed, slit along the longitudinal slit line, and divided into four web materials. Thereafter, the web materials are superposed on each other and are intermittently fed, and a plastic bag is manufactured by each web material. Therefore, in the swinging direction of the reference arm 2, the three secondary arms 5a, 5b, 5c are arranged parallel to the reference arm 2 with a space therebetween and in parallel with each other, and the secondary fulcrum 6a, The secondary dancer rollers 7a, 7b, and 7c are supported by the tips of the secondary arms 5a, 5b, and 5c (FIG. 2A). The secondary arms 5a, 5b, and 5c have the same length as the reference arm 2. Further, three links 8a, 8b, and 8c are combined therewith, and the links 8a, 8b, and 8c are provided between the secondary arms 5a, 5b, and 5c and the reference arm 2, and each of the secondary arms 5a and 5b. , 5c are individually connected to the reference arm 2, and three sets of parallelogram link mechanisms are constituted by both ends of the links 8a, 8b, 8c, the reference fulcrum 3 and the secondary fulcrums 6a, 6b, 6c. 5a, 5b and 5c individually follow the reference arm 2 and swing around the secondary fulcrums 6a, 6b and 6c.

  Further, the web materials are separated from each other, and the separated web materials are engaged with the reference dancer roller 4 and the secondary dancer rollers 7a, 7b, and 7c. Further, each web material is intermittently fed so that the reference arm 2 and the secondary arms 5a, 5b, 5c swing around the reference fulcrum 3 and the secondary fulcrum 6a, 6b, 6c, and the reference dancer roller 4 and the secondary dancer roller. 7a, 7b and 7c alleviate the tension fluctuation of the web material.

  In the case of this apparatus, when the reference dancer roller 4 and the secondary dancer rollers 7a, 7b, 7c are synchronized with each other, and are oscillated with the same amount of swinging, and a pattern is printed on the web material, there is no deviation in the positional relationship between the web materials. The pattern can be matched exactly. The reference arm 2 and the secondary arms 5a, 5b, 5c can be smoothly swung, and the tension of the web material can be relaxed accurately.

  One web material may be divided into five web materials, and each web material may be intermittently sent to produce a plastic bag. In this case, in the swinging direction of the reference arm 2, the four secondary arms 5a, 5b, 5c, and 5d are arranged parallel to the reference arm 2 with a space therebetween and in parallel with each other. Secondary dancer rollers 7a, 7b, 7c, 7d are supported at the tips of the next arms 5a, 5b, 5c, 5d (FIG. 2B). Further, four links 8a, 8b, 8c, 8d are combined with this, each secondary arm 5a, 5b, 5c, 5d is individually connected to the reference arm 2, and both ends of the links 8a, 8b, 8c, 8d, The reference fulcrum 3 and the secondary fulcrums 6a, 6b, 6c, 6d constitute four sets of parallelogram link mechanisms, and each secondary arm 5a, 5b, 5c, 5d individually follows the reference arm 2, What is necessary is just to rock around the fulcrum 6a, 6b, 6c, 6d.

  Then, when the separated web material is engaged with the reference dancer roller 4 and the secondary dancer rollers 7a, 7b, 7c, 7d, the tension variation of the web material is relieved by the reference dancer roller 4 and the secondary dancer rollers 7a, 7b, 7c, 7d. The There is no deviation in the positional relationship between the web materials, and the patterns can be matched exactly. Furthermore, the reference arm 2 and the secondary arms 5a, 5b, 5c, 5d can be smoothly swung.

  In short, when intermittently feeding at least three webs, at least two secondary arms are spaced parallel to the reference arm and parallel to each other in the swing direction of the reference arm. The secondary dancer roller is supported at the tip of each secondary fulcrum. Furthermore, at least two links are combined with this, each secondary arm is individually connected to the reference arm, and at least two sets of parallelogram link mechanisms are constituted by both ends of the link, the reference fulcrum and the secondary fulcrum, The secondary arm may individually follow the reference arm and swing around the secondary fulcrum.

  A supplementary explanation will be given of the configuration and operational effects of the present invention. As shown in FIG. 3, in the apparatus shown in FIG. Provided at the point, the arms 2, 5a, 5b are connected by one link 13 (FIG. 3A). And, it is conceivable to form two sets of parallelogram link mechanisms by the pins 9 and the respective fulcrums 3, 6a, 6b. In this case, the problem is the processing accuracy of the pins 9 and the pin holes. It is possible to smoothly swing each arm 2, 5a, 5b unless the processing accuracy of the pin 9 and the pin hole is increased and the shape of the two sets of parallelogram link mechanisms is kept completely the same. Can not.

  On the other hand, in the apparatus of FIG. 1, links 8 a and 8 b are provided between the secondary arms 5 a and 5 b and the reference arm 2, and the secondary arms 5 a and 5 b are individually connected to the reference arm 2. Follow individually and swing around the secondary fulcrum 6a, 6b. Therefore, in the two sets of parallelogram link mechanisms, the reference arm 2 and the secondary arms 5a and 5b can be smoothly swung even if their shapes are not completely the same. There is no need to increase the processing accuracy of the pins 9 and the pin holes.

  In the apparatus of FIG. 2, for example, the adjacent arms 2 and 5a are connected by three links 14, the adjacent arms 2 and 5b are connected, and the adjacent arms 5b and 5c are connected (FIG. 3B). And, it is conceivable that three sets of parallelogram link mechanisms are constituted by the pins 9 and the respective fulcrums 3, 6a, 6b, 6c. A backlash occurs, and the backlash accumulates for each of the arms 2, 5a, 5b, and 5C. In particular, play is accumulated by the three links 14 between the outermost arms 5a and 5c. Furthermore, when the adjacent arms are connected by the four links in the five adjacent arms instead of the four adjacent arms 2, 5a, 5b, and 5c, the backlash is accumulated by the four links between the outermost arms. To do. When the adjacent arms are connected by the further links in the further adjacent arms, the backlash is accumulated by the further links between the outermost arms. For this reason, each arm 2, 5a, 5b, 5c cannot be smoothly swung.

  On the other hand, in the apparatus of FIG. 2, each secondary arm 5a, 5b, 5c is individually connected to the reference arm 2, and individually follows the reference arm 2, and swings around the secondary fulcrums 6a, 6b, 6c. Therefore, even if play occurs in the pin 9 and the pin hole, it does not accumulate for each arm, and the reference arm 2 and the secondary arms 5a and 5b can be smoothly swung.

  In the present invention, first, a reference arm is arbitrarily selected. Each secondary arm is individually connected to the reference arm so that each secondary arm individually follows the reference arm. It is obvious that this point is important. It can also be said that this is a feature of the present invention.

1 Web material 2 Reference arm 3 Reference fulcrum 4 Reference dancer rollers 5a, 5b, 5c, 5d Secondary arms 6a, 6b, 6c, 6d Secondary fulcrum 7a, 7b, 7c, 7d Secondary dancer rollers 8a, 8b, 8c, 8d Link

Claims (2)

A web material intermittent feeding device for intermittently feeding at least three web materials,
A reference arm supported by a reference fulcrum, a reference dancer roller supported at the tip, and swinging around the reference fulcrum;
It has the same length as the reference arm, and is arranged parallel to the reference arm in parallel and spaced apart from each other in the swing direction of the reference arm. At least two secondary arms on which secondary dancer rollers are supported;
Both ends, provided between each secondary arm and a reference arm, each secondary arm is individually connected to the reference arm, and at least two sets of parallelograms by the both ends, the reference fulcrum and the secondary fulcrum Comprising a link mechanism, each secondary arm individually following the reference arm, and comprising at least two links that swing around the secondary fulcrum;
The web materials are separated from each other, the separated web materials are engaged with the reference dancer roller and the secondary dancer roller, and the tension fluctuation of the web material is alleviated by the reference dancer roller and the secondary dancer roller. Web material intermittent feeding device.   2. The web material intermittent feed device according to claim 1, wherein a cylinder is connected to the reference arm, and the cylinder is caused to act on the reference arm, the link and the secondary arm to apply tension to the web material.

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