JP2020063084A - Twist packaging machine for uniaxial stretched film and packaging method for twist packaging machine - Google Patents

Abstract

To prevent breakage due to twist of uniaxial stretched film stretched in a longitudinal direction in twist packaging for holding film from a side face in a feeding direction.SOLUTION: A twist packaging machine includes: a sorting device for aligning and sorting packaged objects M; a paper feed device for supplying long film F1; a rotary cutter 7 for cutting the long film F1; a transfer device for holding a film piece F2 while following the packaged object M; a sandwiching device for sandwiching the packaged object M and the film piece F2; a folding device for folding an open end part of the film piece F2; and a twist device for packing the film piece F2 by applying twist packaging to form a final packaging product P. In the twist packaging machine, a paper feed device is disposed at a side face at substantially 90 degrees with respect to in a film feeding direction c on a downstream side of the rotary cutter 7, and a twist mechanism part (arm part) 4a of the twist device is a mechanism for holding and twisting a roll cutting side Fb obtained by cutting the long film F1 of the film piece F2 by the cutter.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a twist wrapping machine for a uniaxially stretched film which covers a packaged object such as a confectionery with a uniaxially stretched film and twists both ends of the film, and a packaging method of the twist wrapping machine.

  A machine for covering a packaged object such as sweets with a film and twisting and closing the open portion of the film for packaging is widely known as a twist packaging machine. A twist wrapping machine generally cuts a long film that is rolled into a roll with a cutter, sandwiches the wrapped product with the cut film pieces, and grips both ends of the film pieces with the arms of the twisting device to twist them. This is a device for packaging packages. This twist wrapping machine includes a twist wrapping machine (hereinafter, referred to as "roll width side gripping") that grips and twists a side (hereinafter, referred to as "roll width side" (Fa in the drawing)) that constitutes a roll width of a long film. "Twist wrapping machine") and a twisting wrapping machine (hereinafter, referred to as "twist wrapping machine") that grips and twists a side of a cut surface of a film piece obtained by cutting a long film (hereinafter, referred to as "roll cutting side" (Fb in the figure)). There are two types: "roll cutting side gripping twist wrapping machine").

  Patent Document 1 is a conventional example of a roll width side gripping twist wrapping machine. As shown in FIGS. 2 to 5, the roll width side gripping and twisting wrapping machine includes a sorting device 1 for aligning and sorting the articles M such as confectionery pieces one by one in a fixed posture and at a fixed interval, and a long film F1. And a rotary cutter 7 for cutting the long film F1 fed from the paper feeding device 6 into film pieces F2 of a predetermined size, and the article M to be packed is intermittently taken out from the sorting device 1. At the same time, a transfer device 2 for holding the film piece F2 along with the object to be packaged M, and a holding device 3 for holding the object to be packaged M received from the holding hole 16 by the transfer device 2 with the film piece F2. And a folding device 5 that folds the open end of the film piece F2 held by the holding device 3 together with the object M to be packaged, and the film piece F2 is twist-wrapped while being held by the holding device 3. And a twisting device 4 for producing a packaged product P in a final packaged state.

  The conventional roll width side gripping twist wrapping machine of FIGS. 2 to 5 performs twist wrapping in the procedure shown in FIG. In the sorting apparatus 1, the articles M to be packaged are fitted and held in the holding holes 16 one by one by the intermittent rotation operation of the rotating disk 11. At the same time as the head 21a of the pushing rod 21 (of the transfer device 2) pushes up the article to be packaged M 1 in the holding hole 16 located at the position facing the holding device 3 from below, the sheet M is fed onto the upper surface of the article to be packaged M 1. The long film F1 supplied by the device 6 is attached by a film piece F2 cut into a predetermined size by the rotary cutter 7, and the pressing member 22a of the pressing rod 22 faces from above the article M to be packaged. The article to be packaged M is clamped between the head portion 21a and the pressing member 22a, and in this state, the article to be packaged M 1 is moved upward. After that, the object to be packaged M and the film piece F2 are sandwiched by the clamping device 3, and the film piece F2 is folded around the center (folding direction d) to be sandwiched by the film piece F2, and the object to be packaged M is the film. The piece F2 semi-wraps the U-shaped cross section. Further, after the article M and the film piece F2 are separated from the head portion 21a and the pressing member 22a, the article M and the film piece F2 are carried to the folding device 5 as the holding device 3 rotates. The folding device 5 folds both sides of the open part of the film piece F2 surrounded by the article M in a U shape inward. The to-be-packaged object M and the film piece F2, in which the film piece F2 is folded and temporarily wrapped, are carried to the twisting device 4, and are gripped from both end portions of the side surface with respect to the film feeding direction c, and the film is twisted to obtain the final packed state. Becomes

  The roll width side gripping twisting wrapping machine is characterized in that the sheet feeding device 6 to the twisting device 4 are packaged in parallel to the feeding direction of the long film (X (X axis direction shown in FIGS. 2 to 5)). This is the point where objects and films are transferred. Therefore, in the twisting device 4, both ends of the side surface with respect to the film feeding direction c, that is, the roll width side Fa is gripped and the film is twisted. At this time, when the packaging film is a uniaxially stretched film stretched parallel to the longitudinal direction, it is twisted in parallel with the stretching direction of the uniaxially stretched film as shown in FIG. A break occurs in the direction, causing a tear.

  On the other hand, the twist wrapping machine of Patent Document 2 is a conventional example of a roll cutting side gripping twist wrapping machine. The twisting mechanism of the roll cutting side gripping twisting wrapping machine of Patent Document 2 is conveyed to the cutting position while the long film sheet (continuous sheet) and the object to be wrapped are sandwiched, and is wrapped around the outer periphery of the object to be wrapped in a tubular shape. The continuous sheet is cut by a cutter on the downstream side of the cutting position, thereby forming a semi-wrapped product in which the packaging sheet is wrapped around the outer periphery of the packaged product in a tubular shape, and then the catcher is vertically moved 90 degrees. When it reaches the standing position by rotating and further moves to the twisting position, the upper and lower ends of the packaging sheet of the semi-packaged product are flatly pinched by the tabs of the rotary tab, and then the rotary shaft equipped with the rotary tab. Rotates, whereby the upper and lower ends of the packaging sheet are twisted.

  In the roll cutting side gripping twist wrapping machine of Patent Document 2, the roll cutting side Fb of the film piece is rotated by the rotary picking tool after the long sheet is cut and the wrapping sheet and the object to be packaged held by the catcher are rotated up and down by 90 degrees. As shown in FIG. 1B, the knurled tool is gripped on the roll and the twisting step is performed in a direction perpendicular to the stretching direction of the uniaxially stretched film, that is, the roll cutting side is gripped and twisted. do not do. However, on the other hand, this type of roll cutting side gripping twist wrapping machine wraps the wrapped film around the film sheet while running the long film, cuts the long film sandwiching the wrapped product, and cuts the semi-packaged product. There is a problem in that the line length becomes long and the machine becomes huge because a complicated process of grasping by the catcher, rotating it once, then grasping by the rotary knob and twisting is performed.

JP-A-7-101417 JP, 2008-137716, A

  An object of the present invention is to maintain a twisting mechanism of a conventional roll width side gripping and twisting packaging machine and to rotate a film piece at 90 ° without rotating the film piece, and to cut a long film side of a cut surface (roll cutting). (EN) Provided is a twist wrapping machine which grips and twists the side Fb), and prevents the uniaxially stretched film stretched in the longitudinal direction from being damaged by the twist.

  The present inventor, in a twist wrapping machine having a twist mechanism of a conventional roll width side gripping twist wrapping machine (does not rotate a film piece at 90 °), feeds a long film downstream of a rotary cutter 7. It was found that the uniaxially stretched film stretched in the lengthwise direction can be prevented from being damaged by twisting by performing from the side surface side (Y axis direction) with respect to the direction c (X axis direction).

The invention according to claim 1 is
The long film F1 is cut to produce a film piece F2, the object to be packaged M is sandwiched by the film piece F2, and the open portion of the film piece F2 is grasped and twisted by the two opposing arm portions 4a of the twisting device 4. A twist wrapping machine for wrapping the article M to be packaged,
The twist wrapping machine includes a sorting device 1 for arranging and sorting the articles M to be packaged M one by one at a constant posture and at regular intervals, a sheet feeding device 6 for feeding the long film F1, and a sheet feeding device 6 A rotary cutter 7 for cutting the formed long film F1 into a film piece F2 of a predetermined size, and a state in which the article M to be packaged is intermittently taken out from the sorting device 1 and the film piece F2 is attached to the article M to be packaged. A transfer device 2 for holding, a holding device 3 for holding the packaged object M received from the transfer device 2 with the film piece F2, and an open end of the film piece F2 held together with the packaged object M by the holding device 3. And a twisting device 4 for twist-wrapping the film piece F2 in a state of being sandwiched by the sandwiching device 3 to obtain a final packaged packaged product P.
The sheet feeding device 6 is arranged so that the long film F1 is fed from the side surface (Y-axis direction) by approximately 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the rotary cutter 7. It is arranged on the side surface (Y-axis direction) approximately 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the cutter 7,
The twist mechanism unit (arm portion) 4a of the twist device 4 is a twist packaging machine that is a mechanism for gripping and twisting a side (roll cutting side Fb) of the film piece F2 cut by the cutter.

The invention according to claim 2 is
The twist wrapping machine according to claim 1, wherein the long film according to claim 1 is a long uniaxially stretched film stretched in the long direction.

The invention according to claim 3 is
The long film F1 is cut to produce a film piece F2, the object to be packaged M is sandwiched by the film piece F2, and the open portion of the film piece F2 is grasped and twisted by the two opposing arm portions 4a of the twisting device 4. A packaging method of a twist packaging machine for packaging the article M by
The twist wrapping machine includes a sorting device 1 for arranging and sorting the objects to be packaged M one by one at a constant posture and at regular intervals, a paper feeding device 6 for feeding the long film F1, and a paper feeding device 6 A rotary cutter 7 for cutting the formed long film F1 into a film piece F2 of a predetermined size, and a state in which the article M to be packaged is intermittently taken out from the sorting device 1 and the film piece F2 is attached to the article M to be packaged. A transfer device 2 for holding, a holding device 3 for holding the packaged object M received from the transfer device 2 with the film piece F2, and an open end of the film piece F2 held together with the packaged object M by the holding device 3. And a twisting device 4 for twist-wrapping the film piece F2 in a state of being sandwiched by the sandwiching device 3 to obtain a final packaged packaged product P.
Since the sheet feeding device 6 is arranged on the side surface (Y-axis direction) of approximately 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the rotary cutter 7, the film downstream of the rotary cutter 7 is arranged. A step of feeding the long film F1 from the side surface (Y-axis direction) by approximately 90 degrees with respect to the feeding direction c (X-axis direction),
A process of cutting the long film F1 fed from the paper feeding device by the rotary cutter 7 to produce a film piece F2;
In the direction (Y-axis direction) in which the film piece F2 is perpendicular to the feeding direction of the long film F1, the side (roll width side Fa) that was the side surface portion of the long film F1 is more than the rotary cutter 7. A step of feeding the film piece F2 to a line on the downstream side of the sheet feeding device so as to be on the front side in the downstream film feeding direction c;
A twisting mechanism part (arm part) 4a of the twisting device 4, and a step of gripping and twisting a side (roll cutting side Fb) of the long film F1 of the film piece F2 cut by a cutter, The packaging method.

The invention according to claim 4 is
The long film according to claim 3 is a long uniaxially stretched film stretched in the long direction, which is a packaging method for a twist wrapping machine.

  The conventional roll width side gripping and twisting wrapping machine uses a twisting mechanism portion (arm portion) which is on the side surface approximately 90 degrees with respect to the feeding direction c (X-axis direction) of the film piece F2. The width side Fa) is gripped and the film is twisted to perform twist packaging. For this reason, when carrying out twist packaging using a uniaxially stretched film stretched in the longitudinal direction, when the long film is fed in the feeding direction c (X axis direction) of the film piece, it is twisted in the stretching direction of the uniaxially stretched film. Therefore, there is a risk that the film will tear parallel to the stretching direction. On the other hand, in the present invention, a long uniaxially stretched film is fed from the side surface (Y-axis direction) at about 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the rotary cutter 7 to form a set. The twisting mechanism portion (arm portion) grips the side (roll cutting side Fb) of the long film F1 of the film piece F2 cut by the rotary cutter 7 to perform twisting, so that a force is applied perpendicularly to the stretching direction. The film will not tear.

  According to the present invention, in a twist wrapping machine that twists and wraps a film from the side with respect to the film feeding direction c (X-axis direction), a long film is fed in a film feeding direction c (lower than the rotary cutter 7). By performing from the side direction (Y-axis direction) with respect to the (X-axis direction), it is possible to prevent breakage of the uniaxially stretched film stretched in the longitudinal direction due to twisting.

It is a conceptual perspective view of the uniaxially stretched film used for this invention. It is a perspective view of the conventional roll width side holding twist packaging machine. It is an expansion perspective view of the principal part of the conventional roll width side holding twist packaging machine. It is an expansion perspective view of the transfer device of the conventional roll width side holding twist packaging machine. It is the perspective view which illustrated notionally the operation mechanism of the conventional roll width side holding twist packaging machine. It is the perspective view which illustrated notionally the operation mechanism of the roll cutting edge holding twist packaging machine of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. Note that, in all the drawings, the same reference numerals are given to the same components, and the description thereof will be appropriately omitted. Further, the present embodiment is merely one mode for carrying out the present invention, and the present invention is not limited to the present embodiment, and various modified embodiments are possible without departing from the scope of the present invention. It is possible.

[First Embodiment]
The present invention relates to a twist wrapping machine that twists and wraps a film from the side with respect to the film feeding direction c (X-axis direction) and feeds a long film in a film feeding direction downstream of the rotary cutter 7. The gist of the invention is to prevent damage due to twisting of the uniaxially stretched film stretched in the longitudinal direction by carrying out from c in the side direction (Y-axis direction). So far unknown.

That is, the present invention is
The long film F1 is cut to produce a film piece F2, the object to be packaged M is sandwiched by the film piece F2, and the open portion of the film piece F2 is grasped and twisted by the two opposing arm portions 4a of the twisting device 4. A twist wrapping machine for wrapping the article M to be packaged,
The twist wrapping machine includes a sorting device 1 for arranging and sorting the articles M to be packaged M one by one at a constant posture and at regular intervals, a sheet feeding device 6 for feeding the long film F1, and a sheet feeding device 6 A rotary cutter 7 for cutting the formed long film F1 into a film piece F2 of a predetermined size, and a state in which the article M to be packaged is intermittently taken out from the sorting device 1 and the film piece F2 is attached to the article M to be packaged. A transfer device 2 for holding, a holding device 3 for holding the packaged object M received from the transfer device 2 with the film piece F2, and an open end of the film piece F2 held together with the packaged object M by the holding device 3. And a twisting device 4 for twist-wrapping the film piece F2 in a state of being sandwiched by the sandwiching device 3 to obtain a final packaged packaged product P.
The sheet feeding device 6 is arranged so that the long film F1 is fed from the side surface (Y-axis direction) by approximately 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the rotary cutter 7. It is arranged on the side surface (Y-axis direction) approximately 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the cutter 7,
The twist mechanism unit (arm portion) 4a of the twist device 4 is a twist packaging machine that is a mechanism for gripping and twisting a side (roll cutting side Fb) of the film piece F2 cut by the cutter.

The uniaxially stretched film used in the present invention will be described.
FIG. 1 is a conceptual perspective view of a uniaxially stretched film used in the present invention. When the film is stretched and stretched in a certain direction in the manufacturing process, a film that is very strong against the tensile force in that direction is formed. The film is formed by extruding a melted resin material into a flat shape and then cooling it. The film immediately after the extrusion is formed by entanglement of long plastic molecules. By stretching the film in a certain direction, the long molecules of the plastic stretch straight and align parallel to the pulling direction. A film that has been stretched in one direction during extrusion molding is called a uniaxially stretched film. The uniaxially stretched film is generally stretched in the extrusion direction and the forward direction at the time of forming the film, and in such a film, the polymer chains are oriented in the extrusion direction, that is, the longitudinal direction of the film.

  The uniaxially stretched film has a property that it is strong against the force from the direction perpendicular to the polymer orientation direction, but weak against the force parallel to the molecule orientation direction. That is, as shown in FIG. 1B, there is sufficient strength when twisting (b1) and (b2) so that a force is applied perpendicularly to the stretching direction a of the film, but as shown in FIG. When twisting (b1) and (b2) in parallel with the stretching direction of the film, the film may tear in a direction parallel to the stretching direction.

  2 to 4 are perspective views illustrating the structure of a conventional general roll width side gripping and twisting packaging machine described in Patent Document 1. Further, FIG. 5 is a perspective view conceptually showing an operation mechanism of a conventional roll width side gripping twist wrapping machine.

The conventional roll width side gripping twist wrapping machine, as shown in FIGS.
A sorting device 1 for arranging and sorting the objects to be packed M such as confectionery pieces one by one in a fixed posture and at a fixed interval;
A sheet feeding device 6 for feeding the long film F1,
A rotary cutter 7 for cutting the long film fed from the paper feeding device 6 into film pieces F2 of a predetermined size;
A transfer device 2 that intermittently takes out the article to be packaged M from the sorting apparatus 1 and holds the film piece F2 in a state of being attached to the article to be packaged M,
A holding device 3 for holding the to-be-packaged object M received from the holding hole 16 by the transfer device 2 with the film piece F2;
A folding device 5 for folding the open end of the wrapping paper, which is held together with the article M by the holding device 3, inwardly;
The twisting device 4 for twist-wrapping the film piece F2 in a state of being held by the holding device 3 to form a final packaged product P.

  The sorting device 1 has a structure in which a rotating disk 11 which rotates intermittently is surrounded by an annular frame 12, and a holding hole 16 which is circumferentially arranged at a constant interval on a peripheral portion of the rotating disk 11 covers the rotating disk 11. The slits that hold the package M in place and reach the peripheral edge of the rotary disk 11 from the respective holding holes 16 are used as the passages of the supporting rods of the pushing rod 21 described later.

  The sheet feeding device 6 is located above the sorting device 1 and feeds the long film F1 wound on a reel onto the transfer device 2. The supplied long film F1 is cut by a rotary cutter 7 described later to form a film piece F2. The respective devices downstream of the transfer device 2 are arranged in parallel to the feeding direction of the long film F1 by the paper feeding device 6.

  The rotary cutter 7 is located between the sorting device 1 and the transfer device 2 and has a function of cutting the long film F1 supplied from the paper feeding device 6 and creating a film piece F2.

  The transfer device 2 is composed of an extruding rod 21 having a head portion 21a that fits the holding hole 16 and a pressing rod 22 having a pressing member 22a facing the extruding rod 21 from above at the tip. The head 21a is set so as to linearly ascend in the holding hole 16 from below the holding hole 16 by each separate link mechanism that supports the rod 21 and the pressing rod 22, and at the upper part of this linear ascending section, The pressing member 22a is set to move synchronously.

  The holding device 3 is arranged near the upper portion of the peripheral edge of the rotating disk 11 and is set to have a predetermined loop-shaped locus.

  The folding device 5 includes a guide plate 51 arranged along the movement locus of the holding device 3 in the vicinity of the lowest point of the movement locus, and a swinging claw 52 that swings at a predetermined timing at a position facing the guide plate 51. It consists of and.

  The twisting device 4 is composed of a pair of twisting mechanism parts (arms) 4a on both sides of the orbit of the holding device 3 so as to correspond to each holding device 3.

  Next, the operation mechanism of the conventional roll width side gripping and twisting packaging machine will be conceptually described with reference to FIGS.

In the sorting apparatus 1, the articles M to be packaged are fitted and held in the holding holes 16 one by one by the intermittent rotation operation of the rotating disk 11.
At the same time as the head 21a of the pushing rod 21 (of the transfer device 2) pushes up the article to be packaged M 1 in the holding hole 16 located at the position facing the holding device 3 from below, the sheet M is fed onto the upper surface of the article to be packaged M 1. The long film F1 supplied by the device 6 is attached by a film piece F2 cut into a predetermined size by the rotary cutter 7, and the pressing member 22a of the pressing rod 22 faces from above the article M to be packaged. The article to be packaged M is clamped between the head portion 21a and the pressing member 22a, and in this state, the article to be packaged M 1 is moved upward.

  After that, the object to be packaged M and the film piece F2 are sandwiched by the clamping device 3, and the film piece F2 is folded around the center (folding direction d) to be sandwiched by the film piece F2, and the object to be packaged M is the film. The piece F2 semi-wraps the U-shaped cross section. Further, after the article M and the film piece F2 are separated from the head portion 21a and the pressing member 22a, the article M and the film piece F2 are carried to the folding device 5 as the holding device 3 rotates. The folding device 5 folds both sides of the open part of the film piece F2 surrounded by the article M in a U shape inward. The to-be-packaged object M and the film piece F2, in which the film piece F2 is folded and temporarily wrapped, are carried to the twisting device 4, and are gripped from both end portions of the side surface with respect to the film feeding direction c, and the film is twisted to obtain the final packed state. Becomes

  In addition, in the process of attaching the to-be-packaged object M to the film piece F2, although it is illustrated in FIGS. 2 to 6 that the film piece F2 appears to be located below the to-be-packaged object M. This is for convenience of explanation, and in actuality, the film piece F2 is positioned so as to be abutted on the article M to be packaged.

  During this twisting process, when the packaging film is a uniaxially stretched film stretched in the lengthwise direction, it is twisted in parallel with the stretching direction a of the uniaxially stretched film as shown in FIG. 1A (b1, Because of b2), a break occurs in the stretching direction, causing a break.

  In the conventional roll width side gripping twist wrapping machine, since the paper feeding device 6, the transfer device 2, the holding device 3 and the twisting device 4 are arranged in parallel to the flowing direction (X-axis direction) of the long film F1, the twisting device is provided. The twisting mechanism portion (arm portion) 4a of 4 grips the side surface (roll width side Fa) of the long film F1 and twists the film piece F2 (FIG. 1A). As a result, in the roll width side gripping twist wrapping machine, since the film is twisted in parallel with the stretching direction of the uniaxially stretched film stretched in the longitudinal direction, the film is likely to be broken. Therefore, in the twisting device 4, the twisting mechanism portion (arm portion) 4a needs to be configured so as not to grip both ends of the short side of the long film (FIG. 1B).

  FIG. 6 is a conceptual diagram illustrating the film feeding method of the twisting machine of the present invention. 5 is different from the conventional sheet feeding method shown in FIG. 5 in that the sheet feeding device 6 of the conventional roll width side gripping twist wrapping machine is arranged parallel to the film feeding direction c (X axis direction) downstream of the rotary cutter 7. On the other hand, the sheet feeding device 6 of the roll-cutting edge gripping and twisting machine of the present invention has a side surface (Y-axis direction) approximately 90 degrees to the film feeding direction c (X-axis direction) downstream of the rotary cutter 7. That is, the long film is arranged and fed.

  In the conceptual diagram shown in FIG. 6, the sheet is fed from the front side in the film feeding direction c (X-axis direction) downstream of the rotary cutter 7 which flows from left to right in the figure. The long film F1 fed from the sheet is cut by the rotary cutter 7, is then turned to the direction (Y-axis direction) perpendicular to the sheet feeding direction, and is fed to the line downstream of the sheet feeding device. That is, on the downstream side of the rotary cutter 7, the side (roll width side Fa) that was the side surface portion of the long film F1 becomes the front side in the line feeding direction, and in the twisting device 4, the twisting mechanism portion (arm portion) 4a is the film. The long film F1 of the piece F2 is gripped by the side cut by the rotary cutter 7 (roll cutting side Fb). That is, as shown in FIG. 1B, the uniaxially stretched film is twisted perpendicularly to the stretching direction a (b1, b2), so that no break occurs in the stretching direction.

  If the method of feeding the long film F1 of the present invention is used, the twisting mechanism 4 (arms) can be used in the twisting device 4 without installing a rotating mechanism for rotating the film piece F2 in the middle of the downstream line as in Patent Document 2. Part 4a can hold the side (roll cutting side Fb) obtained by cutting the long film F1 of the film piece F2 with the rotary cutter 7. If a rotating mechanism for rotating the film piece F2 is installed in the middle of the downstream line, the rotating mechanism becomes a bottleneck when increasing the line speed, which hinders efficient production. Therefore, the method for feeding a long film of the present invention, which does not have a film rotating mechanism in the downstream line, is superior to the twist packaging machine having a rotating mechanism.

  By using the twist packaging machine that feeds the long film of the present invention from the side surface side (Y axis direction) with respect to the film feeding direction c (X axis direction) downstream of the rotary cutter 7, When the twist wrapping is performed using the stretched uniaxially stretched film, tearing of the film can be prevented.

DESCRIPTION OF SYMBOLS 1 Sorting device 11 Rotating disk 12 Annular frame 16 Holding hole 2 Transfer device 21 Extrusion rod 21a Head 21b Support rod part 22 Pressing rod 22a Pressing member 3 Holding device 4 Twisting device 4a Twisting mechanism part (arm part)
5 Folding device 51 Guide plate 52 Swing claw 6 Paper feeding device 7 Rotary cutter F Film F1 Long film F2 Film piece Fa Roll width side Fb Roll cutting side
M Packaged product P Packaged product X X-axis direction Y Y-axis direction a Stretching direction b Twisting direction b1 Twisting direction (forward direction)
b2 Twist direction (reverse direction)
c Film feeding direction d Folding direction

Claims (4)

The long film F1 is cut to produce a film piece F2, the object to be packaged M is sandwiched by the film piece F2, and the open portion of the film piece F2 is grasped and twisted by the two opposing arm portions 4a of the twisting device 4. A twist wrapping machine for wrapping the article M to be packaged,
The twist wrapping machine includes a sorting device 1 for arranging and sorting the articles M to be packaged M one by one at a constant posture and at regular intervals, a sheet feeding device 6 for feeding the long film F1, and a sheet feeding device 6 A rotary cutter 7 for cutting the formed long film F1 into a film piece F2 of a predetermined size, and a state in which the article M to be packaged is intermittently taken out from the sorting device 1 and the film piece F2 is attached to the article M to be packaged. A transfer device 2 for holding, a holding device 3 for holding the packaged object M received from the transfer device 2 with the film piece F2, and an open end of the film piece F2 held together with the packaged object M by the holding device 3. And a twisting device 4 for twist-wrapping the film piece F2 in a state of being sandwiched by the sandwiching device 3 to obtain a final packaged packaged product P.
The sheet feeding device 6 is arranged so that the long film F1 is fed from the side surface (Y-axis direction) by approximately 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the rotary cutter 7. It is arranged on the side surface (Y-axis direction) approximately 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the cutter 7,
A twist packaging machine in which the twist mechanism portion (arm portion) 4a of the twist device 4 is a mechanism for gripping and twisting a side (roll cutting side Fb) of the film piece F2 obtained by cutting the long film F1 with a cutter. The twist packaging machine according to claim 1, wherein the long film according to claim 1 is a long uniaxially stretched film stretched in a long direction. The long film F1 is cut to produce a film piece F2, the object to be packaged M is sandwiched by the film piece F2, and the open portion of the film piece F2 is grasped and twisted by the two opposing arm portions 4a of the twisting device 4. A packaging method of a twist packaging machine for packaging the article M by
The twist wrapping machine includes a sorting device 1 for arranging and sorting the objects to be packaged M one by one at a constant posture and at regular intervals, a paper feeding device 6 for feeding the long film F1, and a paper feeding device 6 A rotary cutter 7 for cutting the formed long film F1 into a film piece F2 of a predetermined size, and a state in which the article M to be packaged is intermittently taken out from the sorting device 1 and the film piece F2 is attached to the article M to be packaged. A transfer device 2 for holding, a holding device 3 for holding the packaged object M received from the transfer device 2 with the film piece F2, and an open end of the film piece F2 held together with the packaged object M by the holding device 3. And a twisting device 4 for twist-wrapping the film piece F2 in a state of being sandwiched by the sandwiching device 3 to obtain a final packaged packaged product P.
Since the sheet feeding device 6 is arranged on the side surface (Y-axis direction) of approximately 90 degrees with respect to the film feeding direction c (X-axis direction) downstream of the rotary cutter 7, the film downstream of the rotary cutter 7 is arranged. A step of feeding the long film F1 from the side surface (Y-axis direction) by approximately 90 degrees with respect to the feeding direction c (X-axis direction),
A process of cutting the long film F1 fed from the paper feeding device by the rotary cutter 7 to produce a film piece F2;
In the direction (Y-axis direction) in which the film piece F2 is perpendicular to the feeding direction of the long film F1, the side (roll width side Fa) that was the side surface portion of the long film F1 is more than the rotary cutter 7. A step of feeding the film piece F2 to a line on the downstream side of the sheet feeding device so as to be on the front side in the downstream film feeding direction c;
A twisting mechanism part (arm part) 4a of the twisting device 4, and a step of gripping and twisting a side (roll cutting side Fb) of the long film F1 of the film piece F2 cut by a cutter, Packaging method. The packaging method for a twist packaging machine according to claim 3, wherein the long film according to claim 3 is a long uniaxially stretched film stretched in the long direction.