JP2011230783A - Arch structure of automatic packing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arch structure of an automatic packing machine by which even a tape using an extremely thin film can surely be loaded to an arch body while covering the full length by extremely reducing the frictional area of the tape.SOLUTION: The arch structure includes an arch rear cover 7 which is arranged by erecting, the arch body 21, and an arch rail 22 which guides the outside of a traveling tape b. On the total outer periphery of the end of a tape guiding groove 31 which is installed on the arch body 21, a protruding strip 32 is installed. and the total inner periphery of the arch rail 22 is formed into line contact sections 33a and 33a for guiding the tape b which moves in the tape guiding groove 31 in the traveling direction.

Description

  The present invention relates to an automatic packing machine in which an object to be packed is wound with a thermoplastic tape, and both ends of the tape are welded, and the fed tape is arranged around the object to be packed, and the tape is covered with the tape. The present invention relates to an arch structure capable of winding a package.

  An automatic packing machine for packing an object to be packed with a thermoplastic tape for packing is widely used for packing work, and its main part structure will be described with reference to FIG. 4 which is an embodiment of the present invention. An annular arch structure 2 that is cut off in the middle of the lower part is provided upright on the table 1 on which the article to be packed a is placed, and the tape entry side end 2a and the tape exit side of the arch structure 2 are provided in the table 1 A tape cutting and welding mechanism 3 is provided at a position between the end portions 2b, and a tape feeding / retracting mechanism 4 is provided at a position on the side of the tape-containing side end portion 2a on the side thereof, and a front position of the tape output side end portion 2b. In addition, a tape front end detection device 5 is provided for detecting the front end of the tape coming out from the tape outlet end 2b and stopping the feeding / retracting mechanism 4.

  In the automatic packing machine, the tape b fed out by the feeding / retracting mechanism 4 enters the arch structure 2 and is supplied from the side end 2a, and the leading end of the tape b coming out from the tape exit side 2b is detected by the detection device 5. When detected, the tape b feeding / returning mechanism 4 is stopped and the tape b is loaded over the entire length of the arch structure 2.

  In the automatic packing machine, when the start switch is turned on in a state where the article to be packed a is placed on the table 1 so as to pass through the arch structure 2, the tape a that has come out from the exit end 2 b of the arch structure 2 is turned on. The tip side is held by a clamp plate that moves up and down with the seal plate 6 of the cutting and welding mechanism 3, the tape b is pulled back by the feeding / retracting mechanism 4, and the arch structure 2 is moved laterally to the tape release position to tape from within the arch structure 2. b is detached, and the article to be packed a is wound with the tape b, and then the cutting and welding mechanism 3 cuts the tape b and welds both ends.

  Further, when the automatic packing machine finishes the packing operation and removes the article to be packed a, the arch structure 2 returns to the tape guiding position, and the feeding / withdrawing mechanism 4 enters the inside of the arch structure 2 at the entrance end. The tape b is supplied from 2a, and when the leading end of the tape b is detected by the detection device 5, the feeding / retracting mechanism 4 is stopped, and the tape a is loaded on the entire internal length of the arch structure 2 to prepare for the next packing. It has become.

  The arch structure in the conventional automatic packing machine is provided on the table in a standing manner so that the tape guiding arch main body separated from the lower part and the rear arch cover are opposed to each other, and the side facing the rear arch cover on the arch main body. A tape guide groove that is open at a length is formed over the entire length, and the lower portions on both sides of the arch mounting base that is formed in a frame shape that holds the arch body are supported by guide mechanisms for guiding lateral movement of the arch body. The tape runs along the tape guide groove by interlocking the platform with the lateral movement imparting mechanism of the arch body, bringing the arch body close to the back cover and closing the opening side of the tape guide groove with the back cover. And a tape opening position where the tape is exposed from the tape guiding groove by separating the arch body from the arch back cover. It has between structured as it is possible to traverse (e.g., see Patent Document 1).

  When the arch body stops at the tape guiding position, the tape is loaded to the entire length of the tape guiding groove, and at the time of packing, the tape guiding groove is separated from the tape by lateral movement of the arch body to the tape opening position. Allows for the winding of objects.

  By the way, as for the packing tape b used in the automatic packing machine, the width, thickness and material are selected according to the condition of the packaged object a. For example, when using a tape made of an extremely thin film There is.

  The tape using an ultra-thin film as described above is weak and is fed into the arch while being pushed back by the feed roller of the feed-and-retract mechanism. There is a difference.

  The tape guide groove provided on the conventional arch body is formed in a U-shaped groove with a depth that fits the width of the tape and an opening width that fits the thickness of the tape, so the tape fed into this tape guide groove is the tape The area that comes into contact with the guide groove is inevitably increased, and the generation of frictional resistance increases in proportion to the contact area, and the running tape is caused by friction when it comes into contact with the inner or outer peripheral surface of the tape guide groove. It will be charged with static electricity.

JP 2002-347706 A

  For this reason, when an ultra-thin film tape is loaded into the guide groove of the arch body, a frictional resistance occurs between the arch body or when the tape is attracted to the arch body due to static electricity due to friction. There is a problem that the running property of the tape fed in the boosted state is deteriorated and the waist is folded, and the tape is poorly loaded into the arch body.

  Therefore, an object of the present invention is to automatically reduce the friction area between the arch main body and the tape loaded on the arch main body, and can automatically load the tape using an extremely thin film on the arch main body over the entire length. It is to provide an arch structure of a packing machine.

  In order to solve the above-described problems, the present invention is configured to stand upright so as to face the one side of the arch rear cover so as to guide the inner side of the running tape and the rear arch cover that is erected. The arch main body is designed to move laterally between a tape guide position approaching the cover and a tape release position away from the cover, and is fixedly arranged by being attached to the rear cover of the arch so as to guide the outside of the running tape. The arch rail has a vertical surface that regulates the width direction of the tape with the arch body stopped at the tape guiding position at the position on the rear cover side of the arch on the outer peripheral surface of the arch. A tape guide groove for guiding the arch rail, and the arch rail surrounds the tape guide groove of the arch body that stops at the tape guide position. The outer circumference of the tape guiding groove of the arch main body and the inner circumference of the arch rail are guided in the running direction in the tape guiding groove. It is formed at the line contact portion.

  The line contact portion provided in the tape guide groove of the arch body is formed by a protrusion having a width of about 1.0 mm, and the arch rail is formed by separating an annular thin plate having a thickness of about 1.0 mm with a predetermined interval from the middle of the lower part. The two arch rails can be formed so as to be connected in parallel, and the line contact portion of the arch rail can be formed by the inner periphery of the annular thin plate.

  The ridge which becomes the line contact part of the arch body guides the central part in the width direction at the inner periphery of the moving tape, and the inner periphery of the two annular thin plates which become the line contact parts of the arch rail moves. It can be set as the structure which guide | induces the position of the both sides which pinch | interpose the center part of the width direction on the outer periphery.

  Here, the arch body is formed in an oval shape with the middle part of the lower part cut out, and is arranged upright by being fixed to a frame-shaped arch mount that can be moved laterally. The tape guide groove provided on the outer periphery of the arch body is formed into an L-shaped cross section, and the inside of the L-shaped groove becomes a vertical surface that regulates the width direction of the tape, At the end of the groove facing the rear cover of the arch, a ridge serving as a line contact portion is provided over the entire circumference.

When the arch body stops at the tape guide position close to the arch cover, it is arranged so that a gap of about half the tape width is created between the arch cover and the arch body, and the tape runs along the tape guide groove. About half of the width is exposed at the gap, and the protrusion provided in the guide groove guides the approximate center position of the tape width with respect to the inner peripheral side of the tape.
In addition, the annular thin plate forming the arch rail is formed in an oval shape using a thin plate having a thickness of about 1.0 mm, the inner diameter of which is cut off in the middle of the lower portion of the size that just fits the outer diameter of the arch body. Two annular thin plates are used, and an arch rail is formed by connecting a plurality of locations so as to be in parallel with a spacer so that the gap is slightly narrower than the tape width, and the inner circumference of the two annular thin plates is the tape It becomes a line contact part.

  The arch rail is fixedly disposed on the surface of the rear arch cover where the arch body is located so as to surround the outside of the tape guide groove with respect to the arch body stopped at the tape guide position. The circumference guides the positions of both sides sandwiching the approximate center of the tape width with respect to the outer peripheral side of the tape.

  Therefore, the tape fed into the tape guide groove is guided under the condition of three-wire contact at one inner periphery and two outer periphery, and each line contact portion has a thickness of about 1.0 mm. The contact area of the tape can be extremely reduced, and problems caused by friction can be eliminated.

  According to the present invention, the arch body for guiding the tape and the portion for guiding the tape of the arch rail in the running direction are formed in the line contact portion with respect to the tape, so that the friction area of the tape with respect to the arch body and the arch rail is extremely reduced. In the induction of ultra-thin tape, it is no longer possible for the ultra-thin tape to stick to the arch due to poor loading due to frictional resistance or static electricity due to friction, and the tape using the ultra-thin film is fed into the arch by feeding the feed roller. It can be reliably loaded over the entire length.

The exploded perspective view which shows the arch structure of this invention The expanded vertical side view of the assembly state which shows the state at the time of tape guidance which shows the arch structure of this invention The perspective view which shows the part of the tape containing side edge part in the arch structure of this invention Longitudinal front view showing the main structure of an automatic packing machine using an arch structure

  Hereinafter, embodiments of the present invention will be described on the basis of attached screens.

  As shown in FIG. 4, the main structure of the automatic packing machine using the arch structure 2 according to the present invention is arranged in an upright state on the arch structure 2 on the table 1 on which the article to be packed a is placed. 2 at the position between the tape-entry side end 2a and the tape exit-side end 2b, the seal plate 6 and the tape cutting and welding mechanism 3 located below the seal plate 6; A detecting device 5 that provides a feeding / retracting mechanism 4 for the tape b at a corresponding position and detects the tip of the tape b fed from the tape ejection end 2b at a position facing the tape ejection end 2b. Has been placed.

  The band cutting and welding mechanism 3 includes a first clamp 8 and a second clamp 9, a pressure member 10, a heater 11, a tape cutting blade (not shown), and the like below the seal plate 6. The lower surface of the seal plate 6 is between the upper surface of the entry side end portion 2a of the arch structure 2 and seals the tip of the tape b fed from the output side end portion 2b. The guide gap is led to the lower part of the plate 6.

  The feeding / withdrawing mechanism 4 includes a feed roller 12 that rotates forward and backward, and a feed arm 13 that can swing, and includes an auxiliary roller 14 that sandwiches the tape b between the feed roller 12 and a loading process of the tape b. When the feed roller 12 is rotated forward, the sandwiched tape b enters the arch structure 2 through the guide 15 and is fed from the side end 2a. At the time of the tape b tightening process, the arch structure 2 can be detached from the tape b. When moved to the open position, by pulling back the tape b by reverse rotation of the feed roller 12, the arrangement diameter of the tape b released or released from the arch structure 2 is reduced, and the outer periphery of the packaged object a is taped by the tape b. It comes to tighten.

  As shown in FIGS. 1 to 3, the arch structure 2 according to the present invention is formed by bending the belt plate into an oval shape, cutting the lower middle part, and standing horizontally on the table 1 along the front and rear of the automatic packing machine. An arch body 21 that can be moved, and an arch rail that is formed in an oval shape that is cut off in the middle of the lower part so as to surround the outside of the arch body 21 and that is arranged at a fixed position so as not to move with respect to the arch body 21 22 and a rear arch cover 7 fixedly arranged on the table 1 in a standing state so as to be located in a facing state behind the arch main body 21.

  The arch main body 21 is arranged to stand on the table 1 by the outer periphery being fixedly held by an arch mount 23 assembled in a rectangular frame shape. Supported by the provided guide mechanism, the arch mount 23 is moved by the drive mechanism, so that it moves laterally back and forth so as to approach or separate from the rear arch cover 7.

  As shown in FIG. 1, an arch entrance fitting 24, an arch end fitting 25, and an arch cover 26 are disposed in the vicinity of the separation end of the arch main body 21.

  Further, the rear arch cover 7 is provided with a window hole 27 at a portion protruding above the table 1 so that the article a can be placed on the table 1, and a seal plate 6 is provided at the lower part. An opening 29 for releasing the mechanism 28 for moving back and forth is provided.

  The arch main body 21 has a tape guide position at a stop position approaching the rear arch cover 7 as shown by a solid line in FIG. 2, and with respect to the rear arch cover 7 as shown in FIG. The separated stop position becomes the tape release position, and moves laterally between the tape guide position and the tape release position.

  On the outer peripheral surface of the arch main body 21, the arch main body 21 is provided with a vertical surface 30 that regulates the width direction of the tape b in a state where the arch main body 21 stops at the tape guiding position, and the traveling tape b A tape guide groove 31 that guides the inside is formed over the entire length.

  The tape guide groove 31 is formed into an L-shaped groove in cross section, and the inner side of the L-shaped groove serves as a vertical surface 30 that regulates the width direction of the tape b, and the end that faces the rear arch cover 7 at the groove bottom of the L-shaped groove. In addition, a protrusion 32 serving as a line contact portion of the tape b is provided over the entire circumference.

  As shown in FIG. 2, when the arch body 21 is stopped at the tape guiding position close to the rear arch cover 7, the gap between the rear arch cover 7 and the arch main body 21 is exactly half the tape width. The tape guide groove 31 is an L-shaped groove having a width that can accommodate about half of the width of the tape b and a depth that allows the tape thickness to be sufficiently accommodated, and a low and narrow protrusion 32 provided at the end of the groove bottom. The width is about 1.0 mm.

  Accordingly, about half of the width of the tape b running along the tape guide groove 31 is exposed in the gap between the tape arch cover 7 and the protrusion 32 provided in the tape guide groove 31 is formed in the tape b. The approximate center position of the width of the tape b is guided with respect to the peripheral side.

  The arch rail 22 has annular thin plates 33, 33 separated from the middle of the lower part of the tape guiding groove 31 of the arch main body 21 that stops at the tape guiding position, and can be surrounded by a spacer 34. It is formed by joining two sheets in a parallel state maintaining a slightly narrower interval, and is fixed to the rear arch cover 7.

  The annular thin plates 33 and 33 used for the arch rail 22 are approximately 1.0 mm in thickness, and are formed in an oval shape in which the inner diameter is cut off in the middle of the lower portion of a size that just fits the outer diameter of the arch body 21, The entire inner circumference of the two annular thin plates 33, 33 becomes line contact portions 33a, 33a for guiding the outer circumference of the tape b moving in the tape guiding groove 31 in the running direction. Thus, the positions on both sides sandwiching the approximate center of the width of the tape b are guided.

  Therefore, the tape b fed into the tape guide groove 31 is guided under the condition of three-wire contact between one inner circumference and two outer circumferences, and the protrusion 32 and the line contact portions 33a and 33a have a thickness of about 1.0 mm both inside and outside. Therefore, the contact area between the tape a and the arch main body 21 and the arch rail 22 can be extremely reduced, and the occurrence of problems due to friction can be eliminated.

  FIG. 3 shows the structure of the taped side ends of the arch body 21 and the arch rail 22 in a state where the arch body 21 is in the tape release position, and the lower part of the arch body 21 is placed on the lower horizontal rod 23a of the arch mount 23. The tape guide groove 31 is fixed under the condition of projecting to the rear arch cover 7 side, and the entrance end of the annular thin plate 33 in the arch rail 22 is an inclined cut surface that guides the tape b to enter.

  The arch structure 2 of the present invention is configured as described above, and when the packing process of the automatic packing machine is completed and the article to be packed a is removed from the table 1, the arch body 21 is guided by the tape shown by the solid line in FIG. Returning to the position, the tape b is sandwiched between the feed roller 12 and the auxiliary roller 14 of the delivery / retraction mechanism 4, and the feed roller 12 rotates forward so that the tape b is directed toward the tape guide groove 31 of the arch body 21. Feed from part 2a.

  The tape b fed into the tape guide groove 31 of the arch body 21 travels along the outer periphery of the tape guide groove 31 and the inner periphery of the arch rail 22, and the arch rail located outside the tape guide groove 31. 22 leads to an elliptical arrangement along the shape of the tape guide groove 31. As shown in FIG. 2, the outer circumference of the tape guide groove 31 and the inner circumference of the arch rail 22 are about 1.0 mm thick. Therefore, even if the traveling tape b contacts the outer periphery of the tape guide groove 31 or the inner periphery of the arch rail 22, the contact area can be extremely reduced. This reduces the generation of frictional resistance with respect to the running tape b, and further suppresses the generation of static electricity due to friction, so that the tape b becomes the outer periphery of the tape guide groove 31 or the arch rail. The feed of the feed roller 12 even tape b using ultrathin film can be prevented from being adsorbed to 2, it can be reliably loaded over the entire length of the arch body 21.

  When the tape b is fed over the entire length of the tape guiding groove 31 formed in the arch main body 21, the feeding and pulling mechanism 4 is stopped when the leading end of the tape b fed from the outlet side end 2b is detected by the detection device 5. In the state where the tape b is loaded on the entire inner length of the arch body 21, the next packing is prepared.

  In the packing process of the automatic packing machine, when the object to be packed a is placed on the table 1 and the start switch is pressed, the first clamp 8 of the tape cutting and welding mechanism 3 is raised, and the tape b 2, the position near the exit end 2 b is clamped, and then the arch body 21 moves to the opening position of the tape b so that the tape b moves relative to the arch body 21, as shown by the one-dot chain line in FIG. 2. The feed roller 12 of the feed and pull back mechanism 4 reverses and pulls back the tape b, and the tape b released from the tape guide groove 31 of the arch body 21 moves around the outer periphery of the packaged object a. Then, the upper and lower tapes are overlapped by raising the second clamp 9, the lower tape is cut at the entrance side end 2 a, the pressurizing member 10 is raised and the heater 11 melts the upper and lower tapes. The sealing plate 6 is sequentially removed from between the article to be packed a and the tape b, and if the article to be packed a is removed from the table 1, the packing process is completed and the process proceeds to the tape loading process to the arch body 21. Become.

DESCRIPTION OF SYMBOLS 1 Table 2 Arch structure 2a Banded side edge part 2b Band outgoing side edge part 3 Band cutting welding mechanism 4 Feeding / retracting mechanism 7 Arch cover 21 Arch body 22 Arch rail 23 Arch mounting base 24 Arch entrance fitting 25 Arch end fitting 26 Arch cover 27 Window hole 28 Mechanism 29 Opening 30 Vertical surface 31 Tape guide groove 32 Projection 33 Annular thin plate 33a Line contact portion

Claims (3)

The rear arch cover that is erected and the tape release that is arranged upright so as to face one side of the rear arch cover so as to guide the inner side of the running tape and that is separated from the tape guide position that is close to the arch cover An arch body that is laterally moved between positions, and an arch rail that is fixedly arranged by being attached to the rear cover of the arch so as to guide the outside of the traveling tape,
A tape for guiding the inner side of the running tape with a vertical surface that regulates the width direction of the tape in a state where the arch body stops at the tape guiding position at the position on the rear cover side of the arch on the outer peripheral surface of the arch. A guide groove is formed, and the arch rail is formed in an annular shape in which a part of the lower part of the arch body that can surround the outside of the tape guide groove of the arch body that stops at the tape guide position is cut off. An arch structure of an automatic packing machine in which the outer circumference of the groove and the inner circumference of the arch rail are formed in a line contact portion for guiding the tape moving in the tape guide groove in the running direction.   The line contact portion provided in the tape guide groove of the arch body is formed by a protrusion having a width of about 1.0 mm, and the arch rail is formed by separating an annular thin plate having a thickness of about 1.0 mm with a predetermined interval from the middle of the lower part. 2. The arch structure of an automatic packing machine according to claim 1, wherein the arch rails are formed by being joined in a parallel state, and a line contact portion of the arch rail is formed by an inner periphery of an annular thin plate.   The ridge which becomes the line contact part of the arch body guides the central part in the width direction at the inner periphery of the moving tape, and the inner periphery of the two annular thin plates which become the line contact parts of the arch rail moves. The arch structure of an automatic packing machine according to claim 2, wherein the positions of both sides sandwiching the central portion in the width direction on the outer periphery of the automatic packing machine are guided.

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