JP5526177B2 - Packaging method and packaging device - Google Patents

Description

  The present invention relates to a packaging method and a packaging apparatus.

  For example, a candy with a stick is packaged such that the candy part is contained and the tip part of the stick protrudes to the outside. More specifically, in this type of package, a sheet body made of a resin film is folded, an edge portion excluding one side of the folding side is welded, and a workpiece (for example, candy) is accommodated therein. A part (for example, the front-end | tip part of a stick | rod) protrudes from the edge except the one side of the said folding side.

  Conventionally, the following technique is known as a method for obtaining such a package (see, for example, Patent Document 1). That is, the sheet body is folded in two, and the edges of the remaining three sides except the folding side of the folded sheet body are trimmed by the cutter to shape the shape (so-called trimming is performed). ) Further, the sheet body is once opened after trimming. Then, the workpiece is set on the opened sheet body so that a part thereof protrudes, and the sheet body is folded again. Thereafter, the edges of the remaining three sides excluding the folding side are heat-welded.

JP 2004-303563 A

  However, in the technique of the above-mentioned Patent Document 1, the edges of the three sides must be trimmed one by one, and this requires trimming equipment, which increases man-hours, increases the size of the apparatus, and increases the cost. It was to be invited.

  Moreover, in the package which a part of workpiece | work protrudes, trimming cannot be performed after setting a workpiece | work. That is, trimming must be performed in the stage before setting the workpiece. For this reason, it is necessary to open the sheet body after trimming to set the workpiece, and there is a concern that the positional deviation may occur in the process of opening the sheet body after trimming or in the process of setting the workpiece.

  The present invention has been made in view of the above circumstances and the like, a packaging method capable of suppressing an increase in man-hours, an increase in size of the apparatus, and the like by eliminating trimming, and preventing a problem due to misalignment, and One of the main purposes is to provide packaging equipment.

  In the following, each means suitable for solving the above-described object will be described in terms of items. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1. A package in which a sheet body is folded, at least a part of an edge excluding one side of the folding side is welded, a work is accommodated therein, and a part of the work protrudes from an end edge excluding the one side of the folding side A packaging method for obtaining a body,
Obtaining a sheet body having a line-symmetric shape and having a positioning hole at a line-symmetric position;
In a state where a work is placed at a predetermined position on the sheet body, a folding step of folding the sheet body at a center line thereof;
A welding step of welding at least a part of an edge excluding one side of the folding side,
In the folding process and the welding process, the positioning method is such that the positioning holes at the line-symmetric positions are aligned.

  In addition, in the welding process, it is not always necessary to weld all the edges except for one side of the folding side, for example, as welding in a bag shape so that an opening is formed in part. Also good.

  According to the means 1, a sheet body having a line-symmetric shape and having a positioning hole at a line-symmetric position can be obtained. Next, the work is placed at a predetermined position on the sheet body, and in this state, the sheet body is folded at the center line. Furthermore, at least a part of the edge excluding one side of the folding side is welded. By passing through the above steps, at least a part of the edge excluding one side of the folding side is welded, and the work is accommodated therein, and a part of the work protrudes from the end edge excluding the one side of the folding side. A package is obtained. Now, in the means 1, in the folding step and the welding step, the positioning holes at the line symmetrical positions are aligned. For this reason, the edge part of the sheet | seat body of the obtained package does not shift. Therefore, it is not necessary to perform so-called trimming, in which the edge is cut and aligned after folding once, and the work and equipment for trimming can be omitted. As a result, man-hours can be reduced, and the size of the apparatus can be increased. The increase in cost can be prevented.

Mean 2. Prior to the folding step, comprising a crease applying step of crease the center line of the sheet body,
The packaging method according to means 1, wherein the sheet body is aligned at a predetermined position based on the positioning hole during the folding application process.

  According to the means 2, the folding line is attached to the center line of the sheet body prior to the folding step. In addition, in the folding crease applying step, the sheet body is aligned with a predetermined position based on the positioning holes. Therefore, the crease is accurately placed along the center line. Further, folding in the subsequent folding step is performed accurately. As a result, misalignment can be prevented more reliably.

  Means 3. The crease imparting step includes holding the both sides of the sheet body and sandwiching the central portion of the sheet body with a pair of clamping means in a state where the central portion of the sheet body is slackened. The packaging method according to means 2, characterized in that a crease is attached to the center line of the package.

  According to the means 3, in the folding crease applying step, both sides of the sheet body are held, and the central portion of the sheet body is clamped by the pair of clamping means while the central portion of the sheet body is slackened. Thereby, a crease is attached to the center line of the sheet body. Therefore, the crease is more accurately applied along the center line. As a result, misalignment can be prevented more reliably.

  Means 4. 4. The packaging method according to claim 1, wherein the sheet body has a rectangular shape, and the positioning holes are formed corresponding to the four corners of the sheet body.

  According to the means 4, the positioning holes are formed corresponding to the four corners of the rectangular sheet body. For this reason, since the position shift does not occur particularly at the four corners of the sheet body, the position shift of the entire sheet body can be suppressed to the minimum. As a result, more reliable prevention of misalignment can be realized efficiently.

  Moreover, the above-mentioned technical idea can also be embodied in a packaging device such as the means 5 described below.

Means 5. A package in which a sheet body is folded, at least a part of an edge excluding one side of the folding side is welded, a work is accommodated therein, and a part of the work protrudes from an end edge excluding the one side of the folding side A packaging device for obtaining a body,
Positioning hole forming means for forming a positioning hole at a line-symmetric position with respect to the continuous belt-like sheet material
A cutting means for obtaining a sheet body having a line-symmetric shape by cutting or punching the strip-shaped sheet material and having a positioning hole at the line-symmetric position;
In a state where a work is placed at a predetermined position on the sheet body, folding means for folding the sheet body at a center line thereof;
Welding means for welding at least a part of an edge excluding one side of the folding side;
A packaging apparatus characterized in that the positioning holes at the line-symmetrical positions are aligned with each other by positioning pins during folding by the folding means and welding by the welding means.

  According to the means 5, when the folding and welding are performed, the positioning holes at the line symmetrical positions are aligned with each other by the positioning pins, so that the same effect as that of the means 1 can be realized.

  In addition, in the means 5, a positioning hole is formed at a line-symmetrical position with respect to the continuous strip-shaped sheet material by the positioning hole forming means, and then the strip-shaped sheet material is cut or punched by the cutting means. A sheet body having a symmetrical shape and having positioning holes at line symmetrical positions is obtained. For this reason, it is possible to form a positioning hole by transferring a continuous belt-like sheet material by a predetermined length. Therefore, after obtaining a sheet body having a predetermined dimension, a sheet body having positioning holes can be obtained more efficiently than in the case of forming positioning holes, and as a result, further cost reduction can be achieved. .

Means 6. While having a crease imparting means for making a crease in the center line of the sheet body,
6. The packaging apparatus according to claim 5, wherein the crease imparting means has a positioning pin that is fitted in the positioning hole so as to align the sheet body with a predetermined position.

  According to the means 6, the same effect as the means 2 described above can be achieved.

  Mean 7 The crease imparting means holds both sides of the sheet body with a pair of holding means, and clamps the central part of the sheet body with a pair of clamping means in a state where the central part of the sheet body is slackened. The packaging device according to claim 6, wherein the sheet body is creased at the center line.

  According to the means 7, the same effect as the means 3 described above can be achieved.

Means 8. The sandwiching means includes a pair of rollers for applying a relatively weak crease by squeezing a central portion of the sheet body,
The means 7 according to claim 7, further comprising: a pair of blocks for applying relatively strong creases by pressing a central portion of the sheet body with the relatively weak creases with a predetermined pressure. Packaging equipment.

  According to the means 8, a relatively weak crease is applied by first squeezing the central portion of the sheet member with a pair of rollers. And the relatively strong crease is attached by pressing the center part of the sheet body with the relatively weak crease with a predetermined pressure by a pair of blocks. For this reason, when applying a relatively weak crease, it is possible to place a crease at a more accurate position than when suddenly pressing with a block or the like. Moreover, by attaching a crease through a plurality of stages, the subsequent folding by the folding means can be performed more accurately.

Means 9. The sheet body has a rectangular shape, and
The packaging device according to any one of means 5 to 7, wherein the positioning hole forming means forms the positioning holes corresponding to four corners of the sheet body.

  According to the means 9, the same effect as the means 4 described above can be achieved.

(A)-(f) is the schematic which shows the procedure of the packaging method in one Embodiment. It is a block diagram which shows the concept of each means which comprises a packaging apparatus. It is a schematic block diagram which shows a positioning hole formation means. It is a schematic block diagram which shows a cutting means. (A)-(d) is the schematic which shows a crease providing means and its operation | movement procedure. It is the schematic explaining the operation | movement at the time of delivering a sheet | seat body from a crease provision means to a folding means. (A), (b) is a figure equivalent to the A direction arrow view of FIG. 6, Comprising: It is a partial explanatory view which shows the operation | movement at the time of delivering a sheet | seat body from a folding fold imparting means to a folding means. (A), (b) is a figure equivalent to the B direction arrow view of FIG. 6, Comprising: It is a partial explanatory view which shows the operation | movement at the time of delivering a sheet | seat body from a folding fold imparting means to a folding means. (A) is a schematic block diagram of a folding means, (b) is the schematic which shows operation | movement of a folding means. (A), (b) is a figure equivalent to the B direction arrow view of FIG.9 (b), Comprising: It is a partial explanatory view which shows the delivery operation | movement of a sheet | seat body. It is a schematic block diagram which shows a welding means.

  Hereinafter, an embodiment will be described with reference to the drawings.

  As shown in FIG.1 (f), the package 11 has the sheet | seat body 12 which consists of a laminate film which comprises a thermoplastic resin layer in the surface layer, and the workpiece | work 13 in which most of itself is included in the sheet | seat body 12. As shown in FIG. I have. The sheet body 12 is folded by a center line, and is configured by welding (sealing) edge portions of three sides excluding one side of the folding side. The workpiece 13 includes a workpiece main body 14 and an extending portion 15 extending from the workpiece main body 14. The package body 11 has a work body 14 accommodated inside the sheet body 12, and a part of the work 13 (in this example, the leading end portion of the extending portion 15) has a side opposite to one side of the folding side. It is configured to protrude from the edge.

  Next, the packaging device 21 for realizing the packaging described above, that is, for obtaining the package 11 will be described. As shown in FIG. 2, the packaging device 21 in the present embodiment includes a positioning hole forming unit 22, a cutting unit 23, a crease applying unit 24, a folding unit 25, and a welding unit 26.

  As shown in FIGS. 3 and 4, positioning hole forming means 22 and cutting means 23 are provided corresponding to the transporting process of the strip-shaped sheet material 12 </ b> A that is the raw material of the sheet body 12. More specifically, the raw material of the strip-shaped sheet material 12A wound in a roll shape is supported on the most upstream side in the conveying process. 12 A of strip | belt-shaped sheet materials consist of a laminate film which comprises a thermoplastic resin layer in a surface layer. A plurality of rollers are provided in the process of transporting the belt-like sheet material 12A. Further, the belt-like sheet material 12A is configured to be intermittently conveyed by a predetermined length by being pulled out by a chuck or the like (not illustrated) (or by being pulled by rotation of a roller).

  As shown in FIG. 3, the positioning hole forming means 22 is provided in the middle of the conveying path of the belt-like sheet material 12 </ b> A, and includes a punching punch 31 and a die 32 facing the punching punch 31. . The punching punch 31 and the die 32 are provided at a total of four locations, two each corresponding to the widthwise end of the strip-shaped sheet material 12A. The punching punch 31 is actuated all at once (up and down movement) every time the belt-like sheet material 12A is intermittently conveyed, and the four positioning holes 41, 42, 43, 44 is formed. Moreover, in this embodiment, the positioning holes 41A to 44A and 41B to 44B are formed at 8 places in total, 2 places at four corners for one sheet body 12 (FIGS. 1A and 1B). b) etc.).

  The cutting means 23 is also provided in the middle of the conveyance path of the strip-shaped sheet material 12A. The cutting means 23 is activated each time the belt-like sheet material 12A is pulled out by a predetermined length by the chuck or the like, whereby the belt-like sheet material 12A is cut, and the sheet body 12 as shown in FIG. It has come to be obtained.

  The crease imparting means 24 is for attaching a crease CL to the center line of the sheet body 12 (see FIG. 1C). As shown in FIG. 5 (a), the crease imparting means 24 is connected to the chucks 51, 52 that can sandwich both sides of the sheet body 12, and moves together with the chucks 51, 52. Possible positioning pins 53, 54, a pair of left and right guide rollers 55, 56, a round bar 57 provided at the center in the width direction and supported so as to be movable up and down, and a pair of nip rollers 58 supported so as to be movable up and down. , 59 and a pair of blocks 61, 62.

  Two positioning pins 53 (54) are provided along the depth direction of the sheet with respect to one sheet body 12, and include a housing 63, a pin body 64, a coil spring 65, and a nut 66. Yes. The housing 63 has a bottomed cylindrical shape, and an insertion hole 67 is formed in the bottom (ceiling). The pin body 64 is inserted through the insertion hole 67. The distal end of the pin body 64 has a tapered shape, an enlarged diameter portion 68 is provided in the middle, and a male screw is formed at the proximal end portion. Further, both ends of the pin main body 64 are always in a state of protruding from the housing 63, and nuts 66 are screwed onto the male threads at the base end portion of the pin main body 64. Further, a coil spring 65 is provided on the outer periphery of the pin main body 64 and between the bottom of the housing 63 and the enlarged diameter portion 68 of the pin main body 64. Each chuck 51 (, 52) is connected to the housing 63 of the corresponding positioning pin 53 (, 54) via a connecting means (not shown).

  As shown in FIG. 6, the folding means 25 includes a support base 71 and a movable base (not shown). The support base 71 has a flat plate shape and is always in a fixed state. The support base 71 is provided with fixing pins 72 projecting upward at two locations along the depth direction of the drawing. Further, the movable table extends along the depth direction in FIG. 6, and movable pins 73 are connected to the movable table at two locations separated in the longitudinal direction. Similar to the positioning pins 53 (54), the movable pin 73 is provided on a housing 75 having an insertion hole 74 formed in the bottom, a pin main body 77 having an enlarged diameter portion 76 at an intermediate position, and an outer periphery of the pin main body 77. The coil spring 78 and a nut 79 screwed to the base end side of the pin body 77 are provided. However, a constricted portion 81 is provided at the tip of the pin body 77 of the movable pin 73. Due to the presence of the constricted portion 81, the positioning holes 41 to 44 are easily caught, and the sheet body 12 into which the pin main body 77 is inserted does not easily fall into the positioning holes 41 to 44 simply by turning the movable pin 73 upside down. It is configured. Further, the movable base and the movable pin 73 are supported so as to be able to reciprocate (rotate) between the receiving position P1 shown in FIG. 6 (or FIG. 9A) and the folding position P2 shown in FIG. 9B. Has been. Incidentally, a stopper 82 is provided below the movable pin 73 corresponding to the receiving position P1, thereby restricting the downward movement of the pin body 77.

  As shown in FIG. 11, the welding means 26 is provided corresponding to the folding means 25. The welding means 26 is provided so as to be movable up and down with respect to the support base 71 so that three edge portions (three side portions) excluding one side of the folding side of the folded sheet body 12 can be welded. Yes.

  Now, although the schematic structure of the packaging apparatus 21 is as above, the procedure at the time of obtaining the said package 11 using the said packaging apparatus 21, ie, the packaging method, is demonstrated below.

  First, as shown in FIG. 1 (a) and FIG. 3, each time the belt-like sheet material 12A is intermittently conveyed by a predetermined length, the positioning hole forming means 22 is actuated. Four positioning holes 41A to 44A (41B to 44B) are formed in the width direction. In this example, four positioning holes 41A to 44A (41B to 44B) are formed in one operation, but eight positioning holes 41A to 44A and 41B to 44B are formed at a time. It is good.

  Further, the cutting means 23 is operated at the front end portion of the belt-like sheet material 12A every time the belt-like sheet material 12A is pulled out by a predetermined length by a chuck or the like. Thereby, the sheet body 12 in which a total of eight positioning holes 41A to 44A and 41B to 44B are formed at two positions at four corners as shown in FIG. 1B is obtained.

  Next, the sheet body 12 is supplied to the crease applying means 24. In the folded paper supply means 24, as shown in FIG. 5A, both sides of the sheet body 12 are clamped by chucks 51 and 52, and positioning by positioning pins 53 and 54 is performed. More specifically, the distal ends of the pin bodies 64 of the positioning pins 53 and 54 provided corresponding to the four corners are positioned in the positioning holes 42A, 44A, 42B, and 44B of the sheet body 12 (however, these holes are only 5 to 11, the positioning holes 41A to 44A and 41B to 44B are not shown for the sake of convenience.

  Further, after the positioning is performed, as shown in FIG. 5B, the chucks 51 and 52 (and the positioning pins 53 and 54) are evenly moved to the center. As a result, the center portion of the sheet body 12 hangs down due to the gravity of the round bar 57.

  Further, when the central portion of the sheet body 12 hangs down by a predetermined amount, the suspending portion is sandwiched between a pair of nip rollers 58 and 59 as shown in FIG. Further, the round bar 57 is pulled out during the clamping. Then, the pair of nip rollers 58 and 59 are moved downward. Then, the central portion of the sheet body 12 is squeezed by the nip rollers 58 and 59, and a relatively weak crease is applied.

  Thereafter, the central portion of the sheet body 12 with relatively weak creases is pressed by a pair of blocks 61 and 62 with a predetermined pressure. Thereby, as shown in FIG.1 (c), the comparatively strong crease | fold CL is attached to the center of the sheet | seat body 12. FIG.

  Next, the sheet body 12 with the folding crease CL is supplied to the folding means 25. More specifically, as shown in FIG. 6, the sheet body 12 is supported by the chucks 51, 52 and the positioning pins 53, 54 of the folding fold imparting means 24 and is moved to a position above the folding means 25. Is guided and moved down. As shown in FIGS. 7 and 8, the sheet body 12 is transferred from the positioning pins 53 and 54 to the fixed pin 72 and the movable pin 73 of the folding means 25.

  More specifically, on the left side of FIG. 6, as shown in FIGS. 7A and 7B, the tip of the pin body 64 of the positioning pin 54 is aligned with the tip of the pin body 77 of the movable pin 73. Abut. In this state, when the chuck 52 and the like are further moved downward, the movable pin 73 is already restricted by the stopper 82, whereas the chuck 52 and the housing 63 resist the biasing force of the coil spring 65. The sheet body 12 also moves downward. Then, the pin body 64 of the positioning pin 54 is relatively removed from the positioning holes 42B and 44B of the sheet body 12, and the pin body 77 of the movable pin 73 is fitted into the positioning holes 42B and 44B. Thereby, the delivery from the positioning pin 54 to the movable pin 73 is completed. Since the pin main body 77 is formed with the constricted portion 88, the positioning holes 42 </ b> B and 44 </ b> B are configured to be caught by the constricted portion 88. Further, the pin body 77 of the positioning pin 54 that has once come out of the positioning holes 42B and 44B does not enter the positioning holes 42B and 44B again.

  On the other hand, on the right side of FIG. 6, as shown in FIGS. 8A and 8B, the positioning pin 53 and the fixing pin 72 are offset from each other, and the tip of the pin body 64 of the positioning pin 53 is It abuts on the support base 71 without hitting the fixing pin 72. In this state, when the chuck 51 and the like are further moved downward, the housing 63 (and the chuck 51) moves downward against the urging force of the coil spring 65, and the sheet body 12 also moves downward. Then, the pin body 64 of the positioning pin 53 is relatively removed from the positioning holes 42A and 44A of the sheet body 12, and the fixing pin 72 is fitted into the positioning holes 41A and 43A (holes adjacent to the positioning holes 42A and 44A). . Thereby, the delivery from the positioning pin 53 to the fixed pin 72 is completed. Since the pin main body 77 is formed with the constricted portion 88, the positioning holes 42B and 44B are hooked on the constricted portion 88, and the pin main body 77 of the positioning pin 54 once removed from the positioning holes 42B and 44B. It will not enter again.

  After the delivery of the sheet body 12 is completed, the workpiece 13 is placed at a predetermined position of the sheet body 12 on the support base 71 as shown in FIG. Next, as shown in FIG. 9B, the movable base and the movable pin 73 are rotated from the previous receiving position P1 to the folding position P2. At this time, since the constricted portion 81 is provided in the pin main body 77 of the movable pin 73, the pin main body 77 does not come out of the positioning holes 42B and 44B simply by turning the movable pin 73 upside down. As shown in FIGS. 10A and 10B, at the folding position P2, the movable pin 73 and the fixed pin 72 are offset from each other, and the tip of the pin body 77 of the movable pin 73 is fixed. It abuts on the support base 71 without hitting the pin 72. In this state, when the movable table is further moved downward, the housing 75 (and the movable table) moves downward against the urging force of the coil spring 78, and the sheet body 12 also moves downward. Then, the pin body 77 of the movable pin 73 is relatively removed from the positioning holes 42B and 44B of the sheet body 12, and the fixed pin 72 is fitted into the positioning holes 41B and 43B (holes adjacent to the positioning holes 42B and 44B). . Thereby, the delivery from the movable pin 73 to the fixed pin 72 is completed, and the positioning hole 41A and the positioning hole 41B of the sheet body 12 and the positioning hole 43A and the positioning hole 43B are aligned with each other, and the sheet body 12 Is just folded at the crease CL given earlier.

  Thereafter, as shown in FIG. 11, in the folded sheet body 12, three edge portions (three side portions) excluding one side on the folding side are welded by the welding means 26. And by removing from the support stand 71 by a separate detaching means, the packaging body 11 mentioned above, that is, the sheet body 12 is folded, three sides excluding one side of the folding side are welded, and the work 13 is accommodated inside. At the same time, a package 11 is obtained in which the extended portion 15 of the workpiece 13 protrudes from the end edge.

  As described above in detail, according to the present embodiment, in the folding process and the welding process, the positioning holes 41A to 44A and 41B to 44B at the line-symmetric positions are aligned. For this reason, the edge part of the sheet | seat body of the obtained package does not shift. Therefore, it is not necessary to perform so-called trimming, in which the edge is cut and aligned after folding once, and the work and equipment for trimming can be omitted. As a result, man-hours can be reduced, and the size of the apparatus can be increased. The increase in cost can be prevented.

  In the present embodiment, the crease CL is attached to the center line of the sheet body 12 prior to the folding step. Moreover, the positioning holes 41 </ b> A to 44 </ b> A and 41 </ b> B to 44 </ b> B are aligned with each other even when the crease CL is applied. Therefore, the crease CL is accurately attached along the center line, and the folding in the subsequent folding process is accurately performed. As a result, misalignment can be prevented more reliably.

  Furthermore, when applying the crease CL, a relatively weak crease is applied by first squeezing the central portion of the sheet body 12 with a pair of nip rollers 58 and 59. Then, a relatively strong crease CL is attached by pressing the center portion of the sheet body 12 with a relatively weak crease with a pair of blocks 61 and 62. For this reason, when applying a relatively weak crease, it is possible to place a crease at a more accurate position than when suddenly pressing with a block or the like. Further, by attaching the crease CL through a plurality of stages, the subsequent folding by the folding means can be performed more accurately.

  In addition, the sheet body 12 in the present embodiment has a rectangular shape, and the positioning holes 41 </ b> A to 44 </ b> A and 41 </ b> B to 44 </ b> B are formed corresponding to the four corners of the sheet body 12. For this reason, since the position shift does not occur particularly at the four corners of the sheet body 12, the position shift of the sheet body 12 as a whole can be minimized. As a result, more reliable prevention of misalignment can be realized efficiently.

  In addition, in the present embodiment, the positioning holes 41 </ b> A to 44 </ b> A and 41 </ b> B to 44 </ b> B are also used when the sheet body 12 is transferred from the folding fold imparting means 24 to the folding means 25. For this reason, while improving the convenience in delivery, the positioning holes 41A to 44A and 41B to 44B can be used more effectively. When shipped as a final product, the positions where the positioning holes 41A to 44A and 41B to 44B are formed may be cut off or left as they are. In the latter case, the positioning holes 41A to 44A and 41B to 44B can be used as locking holes when hooking the hooks or the like.

  In addition, you may implement as follows, for example, without being limited to the description content of embodiment mentioned above.

  (A) In the said embodiment, although details are not mentioned in particular about the package 11, the workpiece | work 13, etc., it can apply to the package 11 of the various workpiece | work 13. FIG. For example, as an example of the package 11, a candy with a stick wrapped with an electric component, an electronic component, or a film as exemplified in the background art can be exemplified. Accordingly, the sheet body 12 may be a simple resin film, an aluminum laminate film, or the like as long as the material can be thermally welded. Further, the shape of the sheet body 12 is not limited to a plain rectangular shape, and may be a planar hexagonal shape or an octagonal shape, or may be a circular shape or an oval shape depending on circumstances.

  (B) In the above-described embodiment, eight positioning holes 41A to 44A and 41B to 44B are formed on one sheet body 12, but two positioning holes may be provided at least in a line-symmetric position. The shape and size of the hole are not particularly limited, and may be a long hole, for example. However, in consideration of realizing folding with higher accuracy, it is desirable to provide at least four corners.

  (C) In the above-described embodiment, all the sides except for the one side of the folding side are welded. However, not all the sides may be welded. For example, it can be embodied when a bag-like package is obtained by welding two opposite sides that are adjacent to one side of the folding side. It is good also as not welding a part.

  (D) In the above embodiment, the positioning holes 41A to 44A and 41B to 44B are formed on the belt-like sheet material 12A, and then cut to obtain the sheet body 12. After obtaining the sheet body, the positioning hole may be formed.

  DESCRIPTION OF SYMBOLS 11 ... Packaging body, 12 sheet body, 13 ... Work, 14 ... Work main body, 15 ... Extension part, 21 ... Packaging apparatus, 22 ... Positioning hole formation means, 23 ... Cutting means, 24 ... Folding wrinkle provision means, 25 ... Folding means, 26 ... welding means, 41A to 44A, 41B to 44B ... positioning holes, 53, 54 ... positioning pins, 72 ... fixed pins, 73 movable pins.

Claims (9)

A package in which a sheet body is folded, at least a part of an edge excluding one side of the folding side is welded, a work is accommodated therein, and a part of the work protrudes from an end edge excluding the one side of the folding side A packaging method for obtaining a body,
Obtaining a sheet body having a line-symmetric shape and having a positioning hole at a line-symmetric position;
In a state where a work is placed at a predetermined position on the sheet body, a folding step of folding the sheet body at a center line thereof;
A welding step of welding at least a part of an edge excluding one side of the folding side,
In the folding process and the welding process, the positioning method is such that the positioning holes at the line-symmetric positions are aligned. Prior to the folding step, comprising a crease applying step of crease the center line of the sheet body,
2. The packaging method according to claim 1, wherein, in the crease applying step, the sheet body is aligned at a predetermined position based on the positioning hole.   The crease imparting step includes holding the both sides of the sheet body and sandwiching the central portion of the sheet body with a pair of clamping means in a state where the central portion of the sheet body is slackened. The packaging method according to claim 2, wherein a crease is attached to the center line.   The packaging method according to claim 1, wherein the sheet body has a rectangular shape, and the positioning holes are formed corresponding to four corners of the sheet body. A package in which a sheet body is folded, at least a part of an edge excluding one side of the folding side is welded, a work is accommodated therein, and a part of the work protrudes from an end edge excluding the one side of the folding side A packaging device for obtaining a body,
Positioning hole forming means for forming a positioning hole at a line-symmetric position with respect to the continuous belt-like sheet material
A cutting means for obtaining a sheet body having a line-symmetric shape by cutting or punching the strip-shaped sheet material and having a positioning hole at the line-symmetric position;
In a state where a work is placed at a predetermined position on the sheet body, folding means for folding the sheet body at a center line thereof;
Welding means for welding at least a part of an edge excluding one side of the folding side;
A packaging apparatus characterized in that the positioning holes at the line-symmetrical positions are aligned with each other by positioning pins during folding by the folding means and welding by the welding means. While having a crease imparting means for making a crease in the center line of the sheet body,
6. The packaging apparatus according to claim 5, wherein the crease imparting means has a positioning pin that is fitted in the positioning hole so as to align the sheet body with a predetermined position.   The crease imparting means holds both sides of the sheet body with a pair of holding means, and clamps the central part of the sheet body with a pair of clamping means in a state where the central part of the sheet body is slackened. The wrapping apparatus according to claim 6, wherein a folding line is attached to a center line of the sheet body. The sandwiching means includes a pair of rollers for applying a relatively weak crease by squeezing a central portion of the sheet body,
8. A pair of blocks for attaching a relatively strong crease by pressing a central portion of the sheet body with the relatively weak crease at a predetermined pressure. Packaging equipment. The sheet body has a rectangular shape, and
The packaging device according to any one of claims 5 to 7, wherein the positioning hole forming means forms the positioning holes corresponding to four corners of the sheet body.

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