Adjustable bag making machine

Abstract

To provide an adjustment-type bag maker allowed to couple and decouple a moving-guide plate and a coupling member to and from each other with a simple configuration and operation.CONSTITUTION: An adjustment-type bag maker comprises a pair of right and left fixed guide plates 2 that constitute a bottom part of a bag maker, a pair of right and left moving guide plates 5 that move back and forth with respect to a center line of the bag maker, and a coupling member 10 that couples them together. The moving-guide plate has a cone-shaped hole portion 20 that is tapered at a lower end for inserting a first coupling piece 14 provided at one end of the coupling member and comprises a cut-out portion 21 in a circumferential part of the hole portion 20. By inserting an end 14a of the first coupling piece of the coupling member from below of the moving-guide plate into the hole portion in a state of matching the cut-out portion and, in the inserted state, rotating the first coupling piece in the hole portion so as to come out of a setup area of the cut-out portion, both ends of the coupling piece are prevented from being detached from the hole portion.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an adjustable bag making machine. [Background technology]

[0002] A pillow packaging machine forms a cylindrical packaging film by continuously pulling out a strip-shaped packaging film and forms the cylindrical packaging film into a cylindrical shape while pulling the film, and sequentially supplies products into the cylindrical packaging film. A bag former is used to form the strip-shaped packaging film into a cylindrical shape.

[0003] This bag making machine has various configurations for forming a strip-shaped packaging film into a cylindrical shape, and forms the cylindrical shape by passing the packaging film along the inner peripheral surface of a guide member of a predetermined shape. The dimensions and shape of the bag making machine are changed as appropriate depending on the dimensions and shape of the package, i.e., the product. Therefore, in order to provide versatility, various adjustable bag making machines have been developed that allow changes in at least one of the width direction and the height direction, such as the one disclosed in Patent Document 1.

[0004] The adjustable bag maker disclosed in Patent Document 1 is applied to a regular pillow packaging machine in which packaging film is supplied to the bag maker from above and both side edges of the packaging film are overlapped below the bag maker, and a movable guide plate is arranged to overlap a pair of fixed guide plates that are divided into two by a center line along the conveying direction and form the bottom of the bag maker, and the inclined sides of the carry-in side edges of both guide plates are positioned in the same straight line, and the movable guide plate moves forward and backward along the inclination direction of the inclined sides. The fixed guide plate is provided with a band-shaped guide hole formed along the inclined sides and the side edge on the center line side, and one end of a connecting member is rotatably connected to the movable guide plate, and the other end of the connecting member is joined to the guide hole. When the movable guide plate moves in a direction away from the center line and leaves the fixed guide plate, the side edge of the rotated connecting member is positioned on the line connecting the inclined sides of both guide plates, and the carry-in side forms a single continuous guide line portion.

[0005] In addition, the connecting member is disposed on the underside of the movable guide plate, and since the packaging film passes near the inclined edge of the movable guide plate, it is not possible to provide a portion that protrudes significantly below the underside of the movable guide plate. Therefore, the structure for rotatably connecting one end of the connecting member to the movable guide plate cannot be fixed with screws, so welding is used to prevent the rotating shaft from protruding upward or downward. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 4127894 Summary of the Invention [Problem to be solved by the invention]

[0007] When the moving guide plate wears out with use, it becomes necessary to replace the part, but because the moving guide plate and the connecting member are welded together, they cannot be disassembled, and the connecting member must be replaced together. Furthermore, because the connecting member and the fixed guide plate are also constructed in such a way that they cannot be disassembled, the three parts (moving guide, connecting member, and fixed guide) must be replaced as a whole.

[0008] And since it is the moving guide plate that wears with use, even connecting members that are not worn or have not worn much and can be used normally will have to be replaced, which is undesirable as it will result in a waste of resources.In addition, the parts to be replaced become large, a large working space is required, and it is complicated to collectively attach and detach multiple parts whose relative positions change, and tools may be required to remove parts that are screwed, which may result in poor workability and complicated storage of replacement parts.

[0009] The above-mentioned problems are described as being independent of each other, and the present invention does not necessarily have to solve all of the problems described, but it is sufficient if it can solve at least one of the problems. In addition, we intend to obtain rights to the configuration for solving this problem separately through divisional applications, amendments, etc. [Means for solving the problem]

[0010] In order to solve the above-mentioned problems, the adjustable bag making machine of the present invention has: (1) a pair of left and right fixed guide plates that are divided into two by a center line along the conveying direction of the packaging film and the product and that constitute the bottom of the bag making machine; a pair of left and right movable guide plates that move forward and backward relative to the center line; and a connecting member that connects the fixed guide plate and the movable guide plate, which are located on the same left and right side of the center line, and the entrance side edges of the fixed guide plate and the movable guide plate are inclined sides that are inclined with respect to the conveying direction, and the movable guide plate moves forward and backward along the inclination direction of the inclined sides. The fixed guide plate has a band-shaped guide hole formed along the inclined side and the side edge on the center line side, and one end of the connecting member is rotatably connected to the movable guide plate, and the other end of the connecting member is inserted into the guide hole, and the movable guide plate has a connecting member that connects the movable guide plate and the fixed guide plate to the movable guide plate. A bag making machine configured so that the other end of the connecting member moves relatively within the guide hole in response to the forward and backward movement, and the connecting member rotates around one end, wherein the one end of the connecting member has a band-shaped connecting piece formed by folding the side edge of a flat main body portion, and a hole portion is provided at a predetermined position of the moving guide plate for removably connecting the connecting piece in a freely rotatable manner, the hole portion has an inner dimension on the lower side opening that is smaller than the inner dimension of the opening on the upper side, and has a notch portion on part of the inner peripheral edge of the opening on the lower side, and the connecting piece is inserted into the hole portion with an end of the connecting piece of the connecting member aligned with the notch portion from the lower side of the moving guide plate, and when the connecting piece is rotated within the hole portion in this inserted state and moves out of the installation area of ​​the notch portion, both ends of the connecting piece are prevented from coming off the hole portion.

[0011] With this configuration, the movable guide plate and the connecting member are rotatably connected, and by rotating the connecting member and therefore the connecting piece by a predetermined angle and aligning its end with the notch of the hole provided in the movable guide plate, the connecting piece can be removed from the hole, and the movable guide plate and the connecting member can be separated. Therefore, for example, when the movable guide plate wears out with use and needs to be replaced, only the movable guide plate can be replaced by removing only the movable guide plate and attaching a new movable guide plate to the connecting member.

[0012] (2) The connecting piece may be provided at the tip of a connecting piece provided on the side edge of the main body, and the connecting piece may be folded back to form a gap between the connecting piece and the main body. In this way, the inner peripheral portion on the lower side of the hole is positioned in the gap formed between the connecting piece and the main body, resulting in a sandwiched state between the top and bottom, and a stable connected state can be maintained even if, for example, the connecting member moves vertically relative to the moving guide plate.

[0013] (3) The inner peripheral surface of the hole may be configured as an inclined surface with an inner dimension that decreases toward the bottom. In this way, even if there is variation in the dimensions of the connecting piece and / or the hole, the connecting piece can be brought into contact with the inner peripheral surface of the hole when inserted into the hole, thereby preventing separation. The inclined surface is preferably a straight line with the same inclination angle over the entire range from the top to the bottom, as in the cone-shaped in the embodiment, because this makes processing easier, but is not limited thereto, and may take various forms, such as a curved surface with a different inclination angle in the up-down direction.

[0014] (4) The notch may be provided at one location in the circumferential direction. In this way, the position at which the connecting piece is attached to and detached from the hole is limited to one location within a 360-degree range, making it possible to prevent the connecting member and the movable guide plate from accidentally coming apart.

[0015] (5) It is preferable that the end of the connecting piece is not positioned in the installation area of ​​the notch within the rotation range of the connecting member accompanying the forward and backward movement of the movable guide plate. In this way, the movable guide plate is prevented from separating during normal operation, and the movable guide plate can be replaced, for example, by stopping operation and rotating it by a predetermined angle or more. Effect of the Invention

[0016] According to the present invention, the movable guide plate and the connecting member can be connected and disconnected with a simple configuration and operation, and when the movable guide plate is damaged and needs to be replaced, only the movable guide plate can be replaced. [Brief description of the drawings]

[0017] [Figure 1] 1 is a plan view showing a preferred embodiment of an adjustable bag making device according to the present invention. FIG. [Diagram 2] This is a plan view showing a movable guide plate and a fixed guide plate on one side and the connecting member connecting them, where (a) shows the state in which the movable guide plate has been moved outward, and (b) shows the state in which the movable guide plate has been moved toward the center line. [Diagram 3] 1A is a plan view showing the movable guide plate, and FIG. 1B is a cross-sectional view taken along line BB in FIG. [Figure 4] 1A is a front view showing the movable guide plate, and FIG. 1B is an enlarged cross-sectional view taken along line AA in FIG. [Diagram 5] 1A is an oblique view showing the unfolded state of the connecting member before it is bent, FIG. 1B is an oblique view showing the connecting member, and FIG. 1C is an enlarged oblique view showing the portion of the first connecting piece and the first coupling piece that is to be bent. [Figure 6] 13 is a plan view showing a connecting portion between the connecting member and the movable guide plate. FIG. [Figure 7] 1A is a perspective view showing a state in which a first connecting piece on one end side of a connecting member is inserted into a hole provided in a horizontal portion of a moving guide plate, and FIG. 1B is an enlarged perspective view showing the connecting portion. [Figure 8]1A is an oblique view showing the state in which a first connecting piece on one end side of the connecting member is inserted into a hole provided in the horizontal portion of the movable guide plate and rotated a predetermined angle, and FIG. 1B is an enlarged cross-sectional view showing the connecting portion. [Figure 9] 13A to 13C are diagrams illustrating a process of attaching and detaching the connecting member and the movable guide plate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art without departing from the scope of the present invention.

[0019] FIG. 1 shows a preferred embodiment of an adjustable bag making machine according to the present invention. As shown in the figure, two fixed guide plates 2, 2 that constitute the bottom surface of the bag making machine 1 are arranged in parallel along the conveying direction on the same plane as the conveying surface of the packaging film and the product (not shown). These fixed guide plates 2, 2 have approximately the same shape so as to be symmetrical with respect to the center line CL in the conveying direction. Specifically, they have a film receiving surface that is the bottom surface part of the bag making machine 1 and is arranged on a horizontal plane, and a guide surface (not shown) that is continuous with the side edge on the tip edge 2a side of the film receiving surface (in the conveying direction, i.e., the center line CL side of the bag making machine) and is bent 90 degrees downward. A gap S is formed between the guide surfaces of the pair of fixed guide plates 2, 2, and both side edges of the strip-shaped packaging film are inserted into this gap S so as to be overlapped.

[0020] The entrance side of the fixed guide plate 2 (rear side in the traveling direction of the film and product) has an inclined edge 2b, and the inclined edges 2b of the two fixed guide plates 2, 2 form a V-shaped guide that juts out toward the center as it moves forward in the traveling direction. As a result, the packaging film is guided by the guide consisting of the inclined edges 2b, and both side edges of the packaging film are guided into the gap between the guide surfaces and come into contact with the film receiving surface. Furthermore, the base end side of the fixed guide plates 2, 2 (outside in the traveling direction of the film) has a protruding piece 2c that protrudes outward, and the protruding piece 2c is bolted to fix the plate to the machine frame.

[0021] A movable guide plate 5 is movably attached to each of these fixed guide plates 2. In this embodiment, the movable guide plate 5 is placed on the upper surface of the fixed guide plate 2. The movable guide plate 5 is shaped as an L-shaped plate with the outer side in the transport direction of the packaging film standing upright, and the horizontal portion 5a constitutes the transport surface of the packaging film. The vertical portion 5b standing perpendicular to the horizontal portion 5a is connected to the side wall 6. The strip-shaped packaging film supplied to the bag making machine is folded along the inner surface of the L-shaped plate of the movable guide plate 5, and is transported so as to follow the vertical portion 5b of the movable guide plate 5 and the inner surface of the side wall 6. As a result, as described above, both side edges of the packaging film are inserted in an overlapping state into the gap S between the guide surfaces of the left and right fixed guide plates 2, and are further formed so as to follow the upper surface (film receiving surface) of the fixed guide plate 2, the horizontal portion 5a and the vertical portion 5b of the movable guide plate 5, and the inner surface of the side wall 6, to make a cylindrical bag.

[0022] The side wall 6 is connected to the movable guide plate 5 and is integrated with it, and moves following the horizontal movement of the movable guide plate 5, and the distance between the opposing side walls 6, 6 also changes. Although not shown, a drive mechanism is connected to the movable guide plate 5 and the side wall 6 and moves the left and right movable guide plates 5 toward and away from each other in the space below the left and right movable guide plates 5. The drive mechanism can adjust the distance between the side walls 6, 6. The drive mechanism, for example, has a screw thread arranged so as to extend in a direction perpendicular to the conveying direction, and a movable table having a female thread that meshes with the screw thread is connected to the side wall 6 and / or the movable guide plate 5 directly or via another connecting member. As a result, the pair of movable guide plates 5 and the side wall 6 are moved toward and away from each other with respect to the center line CL by rotating the screw thread forward and backward by manual operation or motor drive. Note that a specific configuration of this type may be applied to the device disclosed in Patent Document 1, for example.

[0023] The adjustable bag maker of this embodiment uses the above-mentioned mechanism to change the distance between the left and right movable guide plates 5 and the side walls 6, making it possible to adjust the width of the product, and also has a mechanism for changing the height position of the carry-in side of the bag maker, providing a function for adjusting the height of the bag maker, i.e., the height of the packaging film. Note that the specific bag making mechanism is similar to that known in the art, so a detailed explanation will be omitted here.

[0024] The carry-in side of the movable guide plate 5 has an inclined side 5c, similar to the fixed guide plate 2, and this inclined side 5c is located on an extension of the inclined side 2b of the fixed guide plate 2. By operating the drive mechanism as described above, the movable guide plate 5 can be displaced between a state in which it is away from the center line CL, as shown in Fig. 2(a), and a state in which it is close to the center line CL, as shown in Fig. 2(b). When the movable guide plate 5 is moved toward the center of the bag making machine, the inclined side 2b of the fixed guide plate 2 and the inclined side 5c of the movable guide plate 5 overlap, as shown in Fig. 2(b).

[0025] Furthermore, the fixed guide plate 2 and the movable guide plate 5 are connected by a connecting member 10. One end 10a of the connecting member 10 is connected to the horizontal portion 5a of the movable guide plate 5 so as to be rotatable within a horizontal plane, and the other end 10b is connected so as to be movably along a guide hole 11 provided in the film receiving surface of the fixed guide plate 2. The guide hole 11 has a straight portion 11a parallel to the tip edge 2a of the fixed guide plate 2 and an inclined portion 11b parallel to the inclined side 2b, with the straight portion 11a and the inclined portion 11b being continuous.

[0026] 2(b), when the movable guide plate 5 is positioned on the center line CL side of the bag making machine, the other end 10b of the connecting member 10 is positioned within the straight portion 11a of the guide hole 11. In FIG. 2(b), the movable guide plate 5 is positioned above the guide hole 11, and the guide hole 11 is hidden. Then, as shown in FIGS. 1 and 2(a), when the movable guide plate 5 is moved in a direction away from the center line CL of the bag making machine 1 and away from the film receiving surface of the fixed guide plate 2, the other end 10b is positioned within the inclined portion 11b of the guide hole 11. In this state, the side edge 10d of the connecting member 10 is configured to be positioned on a line connecting the inclined sides 2b, 5c of the fixed guide plate 2 and the movable guide plate 5.

[0027] In this manner, even if the movable guide plate 5 moves significantly outward and a space is created between the inclined edge 2b of the fixed guide plate 2 and the inclined edge 5c of the movable guide plate 5, the connecting member 10 is positioned in that space, so the packaging film can be folded at an appropriate position along the continuous guide surface formed by the inclined edge 5c, the side edge 10d of the connecting member 10, and the inclined edge 2b, and can be inserted smoothly, without getting caught along the way, in an overlapping state into the gap S between the guide surfaces of the fixed guide plates 2, 2.

[0028] The connecting member 10 is formed by bending a flat metal plate of a predetermined shape as shown in FIG. 5(a) at an appropriate position (see FIG. 5(b)). The connecting member 10 has a strip-shaped main body 12, and one end portion 12a of the main body 12 is formed to have a narrow width with one side in the width direction cut away. One side of the narrow end portion 12a extending in the longitudinal direction of the connecting member 10 is located on a straight line continuing to one side edge of the main body 12, and the other side is located at a position one step lower toward the center from the other side edge of the main body 12. A rectangular first connection piece 13 extending in an orthogonal outward direction is provided at a predetermined position of the other side, and a narrow strip-shaped first linking piece 14 is provided at the tip side of the first connection piece 13. The main body 12, the first linking piece 13, and the first linking piece 14 may be integrally formed, for example, by punching a metal plate. The first connecting piece 14 is an elongated strip extending in a direction substantially perpendicular to the first connecting piece 13, and both ends 14a in the longitudinal direction are located outside the first connecting piece 13 and are formed in an arc shape. Then, as shown in FIG. 5(b), the first connecting piece 13 is folded back by approximately 180 degrees, and the first connecting piece 14 is configured to overlap one end portion 12a of the main body portion 12 at a predetermined distance (see FIG. 5(c)). Then, this portion of the first connecting piece 14 becomes one end 10a of the connecting member 10, and is rotatably connected to the moving guide plate 5.

[0029] On the other hand, a rectangular second connection piece 16 extending in the longitudinal direction of the main body 12 is provided at a predetermined position of the short side on the other end portion 12b side of the main body 12, and a narrow strip-shaped second linking piece 17 is provided at the tip side of the second connection piece 16. The main body 12, the second connection piece 16, and the second linking piece 17 may be integrally formed by, for example, punching a metal plate. The second linking piece 17 is a narrow strip-shaped piece extending in a direction substantially perpendicular to the second connection piece 16, and both ends 17a in the longitudinal direction are located outside the second connection piece 16 and are formed in an arc shape. Then, as shown in FIG. 5(b), the second connection piece 16 is bent so as to be inclined at a predetermined angle with respect to the main body 12, and the second linking piece 17 is configured to be located at a position one step lower than the other end portion 12b of the main body 12. Then, the portion of the second linking piece 17 becomes the other end 10b of the linking member 10 and is movably attached to the guide hole 11 of the fixed guide plate 2.

[0030] A hole 20 is formed at a predetermined position of the horizontal portion 5a of the movable guide plate 5, penetrating vertically, and allows the first connecting piece 14 of the connecting member 10 to be attached within this hole 20. The hole 20 has a cone-shaped inner peripheral surface, and is formed as an inclined surface in which the inner diameter decreases downward, and further has a notch 21 provided in a portion of the circumferential direction. The notch 21 is configured to penetrate vertically along the inner diameter and inner peripheral edge of the upper end side of the hole 20. The length A of the first connecting piece 14 is equal to the distance B from the notch 21 to the lower end edge of the hole 20 on the opposite side (see FIG. 6).

[0031] As a result, for example, when the connecting member 10 is moved upward from a state where one of the longitudinal ends 14a of the first connecting piece 14 is positioned within the notch 21 and the other end 14a is positioned at a portion facing the notch 21 at the lower edge of the hole 20 (see FIG. 9(a)), the first connecting piece 14 enters the hole 20 (see FIGS. 9(b)(c), 7, etc.). Then, when the connecting member 10 is rotated so that the first connecting piece 14 rotates within a horizontal plane parallel to the horizontal portion 5a with the first connecting piece 14 positioned within the hole 20, the end 14a of the first connecting piece 14 leaves the installation area of ​​the notch 21 and is fitted into the narrowest portion of the tip (inner peripheral edge) of the mortar shape, and is caught and does not come off downward (see FIG. 8, etc.). When the connecting member 10 and the movable guide plate 5 are to be separated from each other while they are connected to each other, the above steps can be reversed to easily remove and separate them.

[0032] When the bag maker is in use, the position of the cutout portion 21 is set so that the end portion 14a of the first connecting piece 14 does not come into contact with the installation position of the cutout portion 21, so that the first connecting piece 14 does not come out of the hole portion 20 even if the connecting member 10 rotates as the movable guide plate 5 moves.

[0033] Furthermore, taking into consideration the machining tolerance of hole 20 of movable guide plate 5, it is advisable to design and manufacture it so that dimension A is slightly larger than dimension B. In this way, when first connecting piece 14 is rotated and end 14a is shifted from notch 21, both end portions 14a are securely caught in cone-shaped hole 20, preventing separation. Even if the relationship A>B is actually established, first connecting piece 14 can be moved in and out by raising and lowering it in a position inclined obliquely relative to hole 20 (see FIG. 9(b)).

[0034] Furthermore, in this embodiment, the thickness of the metal plate constituting the connecting member 10 is made thinner than the thickness of the movable guide plate 5. As a result, when the first connecting piece 14 is in contact with the inner peripheral surface of the cone-shaped hole 20, the position of the lower surface of the first connecting piece 14 is located slightly above the lower edge of the hole 20, i.e., the lower surface of the horizontal portion 5a of the movable guide plate 5. In this embodiment, the thickness of the connecting member 10 is made thinner, so that the upper surface of the first connecting piece 14 is prevented from protruding upward from the upper surface of the horizontal portion 5a of the movable guide plate 5 (see Figs. 8(b), 9(c), etc.). That is, for example, if the plate thickness of the first connecting piece 14 of the connecting member 10 is equal to the plate thickness of the horizontal portion 5a of the movable guide plate 5, if the lower surface of the first connecting piece 14 is located slightly above the lower surface of the horizontal portion 5a, the upper surface of the first connecting piece 14 will protrude upward from the upper surface of the horizontal portion 5a of the movable guide plate 5, and there is a risk that the packaging film will be caught there and damaged. In this embodiment, the occurrence of such a situation can be suppressed by thinning the thickness of the connecting member 10. In other words, it is preferable to thin the thickness so that the first connecting piece 14 does not protrude upward.

[0035] In addition, since the thickness of the connecting member 10 is thus thinned, the lower surface side of the horizontal portion 5a of the movable guide plate 5 is simply where the thin connecting member 10 is located, and there is no portion that protrudes below the lower surface of the connecting member 10, so that the film moves smoothly without getting caught.

[0036] On the other hand, when the second connecting piece 17 is connected to the guide hole 11, the connecting member 10 is placed in an upright position with the second connecting piece 17 side facing down in the upper space relative to the fixed guide plate 2, and the second connecting piece 17 is inserted into the guide hole 11 with the longitudinal direction of the second connecting piece 17 aligned with the direction of the guide hole 11. Then, the connecting member 10 is rotated around the second connecting piece 16 by a predetermined angle, for example, about 90 degrees, with the second connecting piece 17 protruding toward the lower surface side of the fixed guide plate 2. As a result, both ends 17a of the second connecting piece 17 are removed from the formation area of ​​the guide hole 11 and positioned on the lower surface side of the fixed guide plate 2. Then, when the connecting member 10 is tilted and the main body part 12 is moved to a position parallel to the upper surface of the fixed guide plate 2, both ends 17a of the second connecting piece 17 face the lower surface of the fixed guide plate 2, and the lower surface of the main body part 12 comes into contact with the upper surface of the fixed guide plate 2. This prevents the second connecting piece 17 from coming off, and allows the other end 10b of the connecting member 10, ie, the second connecting piece 17, to move along the guide hole 11 as the movable guide plate 5 moves, as described above.

[0037] In this embodiment, the connecting member 10 and the fixed guide plate 2 are also configured to be removable, but they may be integrated and not removable. However, making them removable as in this embodiment is preferable because it simplifies the configuration and also makes it easier to attach and detach the first connecting piece 14 and the hole 20.

[0038] The inner peripheral surface of the hole 20 is configured as a linearly inclined surface in which the inner dimensions / diameter decrease as it goes downwards, but it may also be a curved inclined surface in the vertical direction, for example by increasing the rate at which the inner dimensions / diameter decrease as it goes downwards, and furthermore, it is not limited to a surface in which the dimensions decrease continuously, but may have portions in which they decrease discontinuously.

[0039] Various aspects of the present invention have been described above using embodiments, but it should be noted that these embodiments and descriptions are not intended to limit the scope of the present invention, but are provided to aid in understanding the present invention. The scope of the present invention is not limited to the configurations and manufacturing methods explicitly described in the specification, but also includes combinations of various aspects of the present invention disclosed in this specification. Although the configurations of the present invention that are sought to be patented are specified in the appended claims, it is noted for the sake of clarity that configurations disclosed in this specification that are not currently specified in the claims may be claimed in the future. [Explanation of symbols]

[0040] 1: Bag making machine 2: Fixed guide plate 5: Moving guide plate 6: Side wall 10: Connecting member 11: Guide hole 12: Main body 13: First connecting piece 14: 1st connection piece 16: Second connecting piece 17:Second connecting piece 20: Hole 21: Notch

Claims

1. A pair of left and right fixed guide plates that are divided into two at a center line along the conveying direction of the packaging film and the product and form the bottom of the bag making machine; A pair of left and right movable guide plates that move forward and backward relative to the center line; a connecting member that connects the fixed guide plate and the movable guide plate, the connecting member being disposed on the same left and right side of the center line; the fixed guide plate and the movable guide plate have inclined sides inclined with respect to the conveying direction, and the movable guide plate moves forward and backward along the inclination direction of the inclined sides; the fixed guide plate has a band-shaped guide hole formed along the inclined side and the side edge on the center line side, a bag making machine configured such that one end of the connecting member is rotatably connected to the movable guide plate, the other end of the connecting member is inserted into the guide hole, and the other end of the connecting member moves relatively within the guide hole in response to forward and backward movement of the movable guide plate, whereby the connecting member rotates around the one end, The one end of the connecting member has a band-shaped connecting piece formed by bending a side edge of a flat body portion, a hole for detachably connecting the connecting piece to the movable guide plate at a predetermined position thereof, The hole has an inner dimension at an opening on a lower surface side that is smaller than an inner dimension at an opening on an upper surface side, and has a notch portion on a part of an inner peripheral edge of the opening on the lower surface side, An adjustable bag making machine configured in such a manner that the connecting piece of the connecting member is inserted into the hole with the end of the connecting piece aligned with the notch from the lower side of the movable guide plate, and when the connecting piece is rotated within the hole in the inserted state and moves out of the installation area of ​​the notch, both ends of the connecting piece are prevented from coming off the hole.

2. The connecting piece is provided on a tip side of a connecting piece provided on a side edge side of the main body, 2. The adjustable bag making device according to claim 1, wherein the connecting piece is folded back so that a gap is formed between the connecting piece and the main body portion.

3. 2. The adjustable bag making machine according to claim 1, wherein the inner peripheral surface of the hole is configured as an inclined surface whose inner dimension decreases downward.

4. 2. The adjustable bag making device according to claim 1, wherein the cutout portion is provided at one location in the circumferential direction.

5. An adjustable bag making machine as described in any one of claims 1 to 4, wherein the end of the connecting piece is configured not to be positioned in the installation area of ​​the cutout portion within the rotation range of the connecting member accompanying the forward and backward movement of the movable guide plate.

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