Stretch film packaging device

Abstract

The present invention provides a stretch film packaging device that attaches a roll support rod to an annular body that rotates circumferentially around a central axis of rotation, mounts a stretch film roll to the roll support rod, and rotates the annular body so that the stretch film unwound from the stretch film roll is wrapped around the outer circumference of the packaged item located in the radially inward space of the annular body. [Solution] A stretch film packaging device comprising a C-shaped annular body that rotates circumferentially around a central axis of rotation, with a predetermined region in the circumferential direction being a circumferential gap where the circumferential direction is not continuous; a drive unit that provides a driving force to the annular body to cause it to rotate circumferentially; and a roll support rod supported by the annular body, wherein the annular body is rotated circumferentially, and a stretch film attached to the roll support rod is wrapped around the outer circumference of the packaged item located in the annular body's inner space, which is a space formed radially inward of the annular body.

Description

Technical Field

[0001] This invention relates to a stretch film packaging device.

Background Art

[0002] Regarding a stretch film packaging device that attaches a roll support rod to an annular body that rotates in a circumferential direction around a rotation center axis, mounts a stretch film roll on the roll support rod, and rotates the annular body to wind the stretch film fed out from the stretch film roll around the outer periphery of a package located in the space inside the radius direction of the annular body, various proposals have been made conventionally. For example, Patent Documents 1 and 2.

[0003] The applicant of this application has also proposed a manual stretch film packaging device (Patent Document 3).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of this invention is to propose a stretch film packaging device that attaches a roll support rod to an annular body that rotates in a circumferential direction around a rotation center axis, mounts a stretch film roll on the roll support rod, applies a rotational driving force to the annular body to rotate it, and winds the stretch film fed out from the stretch film roll around the outer periphery of a package located in the space inside the radius direction of the annular body. [Means for solving the problem]

[0006] The present invention can be illustrated as follows: [1] A C-shaped annular body that rotates in a circular motion about a central axis of rotation, wherein a predetermined region in the circumferential direction is a circumferential gap where the region is not continuous, A drive unit that provides a driving force to the annular body to cause the annular body to perform the rotational motion in the circumferential direction, The roll support rod supported by the annular body and It is equipped with, By rotating the annular body in the circumferential direction, the stretch film unwound from the stretch film roll mounted on the roll support rod is wrapped around the outer circumference of the packaged item located in the annular body's inner space, which is a space formed radially inward of the annular body. Stretch film packaging machine.

[0007] [2] The annular body is rotatably supported by an annular body support. The stretch film packaging apparatus comprising an annular support having an annular support space at a position corresponding to the annular inner space and having an annular support space of a size corresponding to the annular inner space, and an annular circumferential void having an annular void having a size in the circumferential direction corresponding to the circumferential size of the circumferential void [1].

[0008] [3] A stretch film packaging apparatus comprising a plurality of outer rotating guide rollers, each rotatably supported with respect to the annular body support and each in contact with the outer circumference of the annular body to guide the rotational motion, the rollers being arranged at a predetermined circumferential distance from each other in the circumferential direction.[2]

[0009] [4] A stretch film packaging apparatus comprising a plurality of inner rotating guide rollers, each rotatably supported with respect to the annular support, and each roller contacting the inner circumference of the annular body to guide the rotational motion, the rollers being arranged at a predetermined circumferential distance from each other in the circumferential direction.[2] or [3]

[0010] [5] A stretch film packaging device according to [2], [3] or [4], wherein a support base for a packaged object, which supports the portion of the packaged object to be wrapped around the outer circumference of the packaged object in a floating state within the inner space of the annular body, is positioned in front of and / or behind the annular body support in the front-to-back direction, which is the direction in which the rotational axis extends, with the annular body support in between. [Effects of the Invention]

[0011] According to this invention, a stretch film packaging device is provided in which a roll support rod is attached to an annular body that rotates in the circumferential direction about a rotational axis, a stretch film roll is mounted on the roll support rod, and a rotational driving force is applied to the annular body to rotate, thereby winding the stretch film unwound from the stretch film roll around the outer circumference of an object to be packaged located in the space on the radially inner side of the annular body. [Brief explanation of the drawing]

[0012] [Figure 1] A perspective view showing an example of a stretch film packaging apparatus according to one embodiment of the present invention. [Figure 2] A front view of the stretch film packaging apparatus shown in Figure 1, with some parts omitted. [Figure 3] A rear view of the stretch film packaging apparatus shown in Figure 1, with some parts omitted. [Figure 4] A perspective view of the stretch film packaging device shown in Figure 1, with a portion omitted, as seen from the rear. [Figure 5] A partially omitted perspective view illustrating an example of the drive mechanism of the stretch film packaging device shown in Figure 1. [Figure 6] A perspective view with a part omitted showing an example of a preparation process when wrapping a stretch film around the outer periphery of an object to be packaged using the stretch film packaging device shown in FIG. 1. [Figure 7] A front view with a part omitted explaining the state where a stretch film is being wound around the outer periphery of an object to be packaged using the stretch film packaging device shown in FIG. 1.

Embodiments for Carrying out the Invention

[0013] The stretch film packaging device 1 of this embodiment includes an annular body 2, a drive unit 4, and a roll support rod 5.

[0014] The annular body 2 rotates in the circumferential direction about a rotation center axis whose position is indicated by the reference symbol R in FIG. 2. For example, in the illustrated example, it rotates in the circumferential direction indicated by the arrow 100.

[0015] This annular body 2 is a C-shaped annular body having a circumferential gap 2b (FIGS. 1 and 2). The circumferential gap 2b is a predetermined region that is not continuous in the circumferential direction of the annular body 2, that is, a portion that is discontinuous in the circumferential direction of the annular body 2.

[0016] The space formed inside the annular body 2 in the radial direction, that is, the inner annular space 2a (FIGS. 1 and 2), becomes the space where the object to be packaged 15 around which the stretch film 16a is wound is located, as will be described later.

[0017] The drive unit 4 (FIGS. 3 and 4) composed of an electric motor or the like applies a driving force to the annular body 2 to cause the annular body 2 to perform the above-described rotational movement in the circumferential direction. It can be configured by a known motor or the like.

[0018] The roll support rod 5 is supported by the annular body 2 as shown in Figures 1 and 6. A stretch film roll 16 (Figures 6 and 7) of stretch film 16a, which will be wrapped around the outer circumference of the packaged item 15, is attached to the roll support rod 5, as will be described later.

[0019] The stretch film packaging device 1 of this embodiment, having the configuration described above, rotates the C-shaped annular body 2 described above in the circumferential direction, for example in the circumferential direction indicated by arrow 100, by receiving a driving force from the drive unit 4, thereby wrapping the stretch film 16a unwound from the stretch film roll 16 mounted on the roll support rod 5 around the outer circumference of the packaged item 15 located in the inner space 2a of the annular body (Figure 7).

[0020] Such a stretch film packaging device 1 can be configured to include an annular support body 3.

[0021] In this case, the C-shaped annular body 2 described above is supported by the annular body support 3 so that it can rotate. For example, as shown in Figures 1 and 2, the C-shaped annular body 2 can be supported by the annular body support 3 so that it can rotate in the circumferential direction indicated by the arrow 100 about the rotational axis indicated by the symbol R in Figure 2.

[0022] In such embodiments, the annular support 3 can be configured to include an annular support space 3a and an annular circumferential void 3b (Figures 1 and 2). For example, as shown in Figures 1 to 3, the annular support space 3a can be configured to have a size corresponding to the annular inner space 2a and to be located at a position corresponding to the annular inner space 2a. The annular circumferential void 3b can also be configured to have a circumferential size corresponding to the circumferential size of the circumferential void 2b and to be located at a position communicating with the annular support space 3a (Figures 1 to 3).

[0023] Furthermore, the annular body support 3 can be configured to include a plurality of external rotation guide rollers. Here, the external rotation guide rollers are rotatably supported on the annular body support 3 about their respective rotational axes, and each abuts against the outer circumference 2c of the annular body 2, guiding the rotational motion of the annular body 2 in the direction indicated by the arrow 100 described above. A plurality of such external rotation guide rollers can be arranged on the annular body support 3 in the circumferential direction of the annular body 2 with a predetermined circumferential spacing between them.

[0024] In the embodiments shown in Figures 1 and 2, four outer rotating guide rollers 6a, 6b, 6c, and 6d, which are spaced equally apart in the circumferential direction of the annular body 2, are arranged on the annular body support 3 so as to be rotatable about their respective rotational axes.

[0025] The annular support 3 described above can be further configured to include a plurality of internal rotating guide rollers. Here, each internal rotating guide roller is rotatably supported on the annular support 3 about its own rotational axis, and each roller contacts the inner circumference 2d of the annular body 2 to guide the rotational motion of the annular body 2 in the direction indicated by the arrow 100.

[0026] Multiple internal rotating guide rollers are arranged on the annular body support 3 with a predetermined circumferential spacing between them in the circumferential direction of the annular body 2. In the embodiment shown in Figures 1 and 2, two internal rotating guide rollers 11a and 11b are arranged on the annular body support 3 with equal circumferential spacing between them in the circumferential direction of the annular body 2.

[0027] An example of such an embodiment of the stretch film packaging apparatus 1 will be described below with reference to Figures 1 to 7.

[0028] Figures 1 to 7 illustrate a stretch film packaging device 1 in which a roll support rod 5 is attached to an annular body 2 that rotates in the circumferential direction indicated by arrow 100 about a rotational axis indicated by symbol R in Figure 2, a stretch film roll 16 is attached to the roll support rod 5, and a rotational driving force is applied to the annular body 2 to cause the aforementioned rotational motion, thereby wrapping the stretch film 16a unwound from the stretch film roll 16 around the outer circumference of the packaged item 15 located in the space radially inward of the annular body 2 (Figure 7).

[0029] In the illustrated embodiment, the annular body 2 is supported by the annular body support 3 in a manner that allows for the rotational movement described above.

[0030] In the illustrated embodiment, the annular support 3 is formed from a plate-like body erected vertically (perpendicular to) the floor surface, and is erected vertically (perpendicular to) the floor surface by a base 20.

[0031] In the illustrated embodiment, the base frame 22 of the base 20 supports the support rods 23a and 23b that extend vertically (perpendicularly) to the floor surface.

[0032] The support rods 23a and 23b support the packaged item support base 30b, which extends parallel to the floor surface, at their upper ends (Figure 1).

[0033] Furthermore, support rods 24a and 24b extend from an intermediate height between support rods 23a and 23b, parallel to the floor surface (Figure 1).

[0034] Support rods 24a and 24b support support rods 26a and 26b extending vertically (perpendicular to the floor) at their tip ends, and support support rods 25a and 25b extending vertically (perpendicular to the floor) at their intermediate ends (Figure 1).

[0035] In the illustrated embodiment, the support rods 25a and 25b support the annular support body 3, which is made of a plate-like material, at their respective upper ends so that it extends vertically (perpendicularly) to the floor surface.

[0036] Furthermore, the support rods 26a and 26b support the packaged item support base 30a, which extends parallel to the floor surface, at their respective upper ends (Figure 1).

[0037] As a result, the annular support body 3, which is a plate-like body erected to extend vertically (perpendicularly) to the floor surface, is sandwiched between the packaged item support base 30a, which is positioned in the front-to-back direction, which is the direction in which the rotational axis extends, and the packaged item support base 30b, which is positioned in the rear (Figure 1).

[0038] Furthermore, the upper side of the packaged item support base 30a, which extends parallel to the floor surface, and the upper side of the packaged item support base 30b, which extends parallel to the floor surface, are supported by support rods 26a, 26b and support rods 23a, 23b so that they are at the same height level from the floor surface.

[0039] The annular body 2 is rotatably supported by an annular body support 3, which is made of a plate-like material, in the circumferential direction indicated by arrow 100, or in the opposite circumferential direction, with respect to the rotational axis whose position is indicated by the symbol R in Figure 2.

[0040] Figure 2 is a partially omitted front view showing the annular body 2 in the stretch film packaging device 1 shown in Figure 1, rotated approximately 300 degrees clockwise (in the direction indicated by arrow 100) from the state shown in Figure 1. In Figure 2, the illustration of the packaged item support base 30a on the front side of Figure 1 and the structure supporting the packaged item support base 30a, which were shown in Figure 1, are omitted, and the state in which the annular body 2 rotates in the direction indicated by arrow 100 due to the driving force applied from the driving means 4 (Figure 3) is explained.

[0041] The annular body 2 is provided with a circumferential void 2b (Figures 1 and 2). The circumferential void 2b is a region in which the annular body 2 is not continuous in a predetermined area in the circumferential direction, and the annular body 2 is a C-shaped annular body provided with such a circumferential void 2b (Figures 1 and 2).

[0042] The annular body 2 is provided with an annular body inner space 2a (Figures 1 and 2) located radially inward. The annular body inner space 2a (Figures 1 and 2) is a space formed radially inward of the annular body 2.

[0043] The inner space 2a of the annular body (Figures 1 and 2) becomes the space where the packaged object 15, around which the stretch film 16a is wrapped, is located, as will be described later (Figure 7).

[0044] Since the annular body inner space 2a (Figures 1 and 2) exists radially inside the annular body 2, the circumferential void 2b described above is continuous with the annular body inner space 2a (Figures 1 and 2).

[0045] In the illustrated embodiment, the roll support rod 5 attached to the annular body 2 is arranged to extend parallel to the rotational axis, which is indicated by the symbol R in Figure 2 (Figure 1).

[0046] A stretch film roll 16 is attached to the roll support rod 5, and a driving force is applied to the annular body 2 that causes it to rotate in the circumferential direction indicated by arrow 100 around the rotational axis, so that the stretch film 16a unwound from the stretch film roll 16 is wrapped around the outer circumference of the packaged item 15 located in the annular body's inner space 2a, which is radially inside the annular body 2 (Figure 7).

[0047] The packaged object 15, on which the stretch film 16a is wrapped around its outer circumference, is placed on, for example, the packaged object support bases 30a and 30b as shown in Figure 6, and is moved as indicated by the arrow 103 in Figure 6 so that it is positioned within the annular inner space 2a.

[0048] As described above, the package support base 30a and the package support base 30b are positioned in front of the annular support 3 and behind the annular support 3, with the annular support 3 in between. Therefore, the portion of the package 15 that is supported by the package support base 30a and the package support base 30b, and on which the stretch film 16a is wrapped around its outer circumference within the annular inner space 2a, is positioned within the annular inner space 2a in a state of, so to speak, floating.

[0049] In this state, the stretch film 16a is wrapped around the outer circumference of the packaged item 15, as shown in Figure 7. Note that, as with Figure 2, Figure 7 omits the illustration of the packaged item support base 30a on the front side in Figure 1 and the structure supporting the packaged item support base 30a, which were shown in Figure 1.

[0050] In Figure 7, the packaged object 15, around which the stretch film 16a is wrapped, is shown to be supported by the rear packaged object support base 30b. The packaged object support base 30b is located behind the annular support body 3 in the front-to-back direction, which is the direction in which the rotational axis extends. Therefore, in Figure 7, the portion of the packaged object 15 around which the stretch film 16a is wrapped exists in a floating state within the annular inner space 2a, as described above.

[0051] In the illustrated embodiment, a ring-shaped support 3, which is erected vertically with respect to the floor surface, is sandwiched between the packaged item support base 30a, which is positioned in the front-to-back direction, which is the direction in which the rotational axis extends, and the packaged item support base 30b, which is positioned in the rear (Figure 1).

[0052] As described above, the package support bases 30a and 30b support the portion of the package 15 to which the stretch film 16a is wrapped around the outer circumference of the package 15 in a floating state within the annular inner space 2a, so that the stretch film 16a is wrapped around the portion of the package 15 that is located within the annular inner space 2a.

[0053] Therefore, if this is possible, it is also possible to have a configuration in which only one of the front package support base 30a or the rear package support base 30b exists.

[0054] Using either the front object support base 30a or the rear object support base 30b, or both, is advantageous in the stretch film packaging process for moving and adjusting the position of objects to be wrapped with stretch film 16a using the stretch film packaging device 1, such as annular objects like tires or long objects like building materials, so that the wrapping target position is always located within the annular inner space 2a.

[0055] In the embodiment shown in Figure 6, the packaged object 15, placed on the packaged object support bases 30a and 30b, is moved as indicated by arrow 103 to be positioned within the inner space 2a of the annular body. Therefore, the circumferential size of the circumferential gap 2b in the annular body 2 can be set to any size as long as it is possible to move the packaged object 15 into the inner space 2a of the annular body, as indicated by arrow 103 in Figure 6, and to remove the packaged object 15 from the inner space 2a of the annular body by moving it in the opposite direction to the direction indicated by arrow 103 in Figure 6 after the wrapping of the stretch film 16a is complete.

[0056] For example, the circumferential size of the circumferential void 2b in the annular body 2 can be in the range of 10% to 40% of the circumference of the annular body 2.

[0057] As described above, in the embodiment shown in Figure 6, the packaged object 15 is moved into the annular inner space 2a via the circumferential gap 2b, as indicated by the arrow 103, and a packaging process is performed in which a stretch film 16a is wrapped around the outer circumference of the portion of the packaged object 15 that is located within the annular inner space 2a.

[0058] Therefore, as described above, the annular body support 3, which is made of a plate-like body that supports the annular body 2 so that it can rotate in the direction of arrow 100, comprises an annular body support space 3a and an annular body circumferential gap 3b in the illustrated embodiment.

[0059] In the illustrated embodiment, the annular support space 3a is the same size as the annular inner space 2a and is located at the same position as the annular inner space 2a. The annular circumferential gap 3b has a circumferential size corresponding to the circumferential size of the circumferential gap 2b and is located at a position that communicates with the annular support space 3a (Figures 1 to 3).

[0060] The position and form in which the annular support space 3a and the annular circumferential gap 3b are arranged on the annular support 3, which is made of a plate-like material, are not limited to these. The packaged object 15, placed on the packaged object support bases 30a and 30b, is moved as shown by arrow 103 in Figure 6, into the annular support space 3a and the annular inner space 2a via the annular circumferential gap 3b and the circumferential gap 2b, and the stretch film 16a is wrapped around the outer circumference of the portion of the packaged object 15 located within the annular support space 3a and the annular inner space 2a. After the wrapping is complete, the wrapped packaged object 15 can be moved on the packaged object support bases 30a and 30b in the opposite direction to the direction shown by arrow 103, and removed to the outside via the annular circumferential gap 3b and the circumferential gap 2b. Various arrangement positions and forms are possible.

[0061] As described above, in the illustrated embodiment, the annular body 2 is supported by an annular body support 3 made of a plate-like material so as to be rotatable in the circumferential direction indicated by arrow 100 with respect to the rotational axis indicated by symbol R in Figure 2. In this embodiment, the annular body support 3 is equipped with a plurality of outer rotation guide rollers 6a, 6b, 6c, and 6d.

[0062] The outer rotation guide rollers 6a, 6b, 6c, and 6d, which are rotatably supported on the annular body support 3 around their respective rotational axes, each contact the outer circumference 2c of the annular body 2 and act as rollers that guide the rotational motion of the annular body 2 in the direction indicated by the arrow 100 described above.

[0063] The outer rotation guide rollers 6a, 6b, 6c, and 6d can be arranged on the annular body support 3 with a predetermined circumferential spacing between them in the circumferential direction of the annular body 2, from the viewpoint of smoothly guiding the rotational motion of the annular body 2 in the direction indicated by the arrow 100.

[0064] For example, when the C-shaped annular body 2 rotates in the direction indicated by the arrow 100, the arrangement of the multiple outer rotating guide rollers can be such that at least three points on the outer circumference 2c of the annular body 2 are always in contact with the outer rotating guide rollers in the circumferential direction of the annular body 2. The multiple outer rotating guide rollers can be arranged on the annular body support 3 with a predetermined circumferential spacing between them in the circumferential direction of the annular body 2.

[0065] In the embodiments shown in Figures 1 and 2, four outer rotating guide rollers 6a, 6b, 6c, and 6d, which are spaced equally apart in the circumferential direction of the annular body 2, are arranged on the annular body support 3 so as to be rotatable about their respective rotational axes.

[0066] Furthermore, in the case where a C-shaped annular body 2 is supported vertically on an annular body support 3 made of a plate-like body erected vertically, as shown in the figure, so as to be rotatable in the circumferential direction indicated by arrow 100, two outer rotation guide rollers 6a and 6b can be arranged vertically below the position of the rotation center axis indicated by the symbol R in Figure 2, on both sides (right and left in Figure 2) of the vertical line passing through the rotation center axis indicated by the symbol R in Figure 2, at a predetermined distance in the circumferential direction of the annular body 2.

[0067] In this embodiment, the drive unit 4, which provides the driving force to cause the C-shaped annular body 2 to perform the rotational motion described above, is located on the lower side of the annular body support 3 (Figure 3).

[0068] A support plate 9 is fixed to the lower side of the annular support body 3 (Figure 2), and a drive unit 4 consisting of an electric motor or the like is mounted on the support plate 9 on the rear side of the annular support body 3, which is the rear side in Figure 2 (Figure 3).

[0069] A large drive pulley 7a is fixed to the front side of the support plate 9 on a drive shaft that extends forward from the drive unit 4, which consists of an electric motor and the like, in Figure 2 (Figure 2). In the illustrated embodiment, a small pulley 7b is positioned above the large drive pulley 7a on the front side of the support plate 9, and an endless drive belt 8 is stretched between the large drive pulley 7a, the outer rotating guide roller 6b, the small pulley 7b, and the outer rotating guide roller 6a (Figures 4 and 5).

[0070] When the drive unit 4, consisting of an electric motor and the like, is driven and the large drive pulley 7a rotates in the direction of arrow 101, the endless drive belt 8 moves in the direction of arrow 102, and in response, the outer rotating guide rollers 6b and 6a rotate in the directions of arrows 104 and 105 around their respective rotation support axes (Figure 2).

[0071] Furthermore, the endless drive belt 8, which is stretched between the outer rotating guide rollers 6b and 6a, contacts the outer circumference 2c of the annular body 2 at the positions of the outer rotating guide rollers 6b and 6a, causing the annular body 2 to rotate in the direction indicated by arrow 100 (Figure 2).

[0072] Furthermore, any drive unit capable of providing the driving force to cause the C-shaped annular body 2 to perform the aforementioned rotational motion is not limited to the form and structure shown above, but can be of various forms and structures. For example, the drive unit 4 can be positioned at a location other than the underside of the annular body support 3.

[0073] In the illustrated embodiment, the annular body support 3 is equipped with inner rotation guide rollers 11a and 11b. The inner rotation guide rollers 11a and 11b are supported by the annular body support 3 so as to be rotatable about their respective rotational axes. They also contact the inner circumference 2d of the annular body 2 and guide the rotational motion of the annular body 2 in the direction indicated by the arrow 100.

[0074] The presence of these internal rotation guide rollers 11a and 11b is advantageous in ensuring more stable rotational motion of the annular body 2 in the direction indicated by the arrow 100.

[0075] In the illustrated embodiment, the C-shaped annular body 2 is supported vertically on an annular body support 3, which is made of a plate-like body erected vertically, so as to be rotatable in the direction indicated by the arrow 100. Therefore, one inner rotation guide roller 11a is positioned below the position of the rotation center axis indicated by the symbol R in Figure 2, and another inner rotation guide roller 11b is positioned above it in the vertical direction.

[0076] In the illustrated embodiment, the inner rotating guide roller 11a is rotatably supported about its rotational axis by the lower support plate 10a fixed to the annular support 3 at a position diametrically symmetric in the vertical direction, and the inner rotating guide roller 11b is rotatably supported about its rotational axis by the upper support plate 10b fixed to the annular support 3 (Figures 1 and 4).

[0077] <Stretch film packaging using stretch film packaging device 1> When performing stretch packaging with the stretch film packaging apparatus 1 of the above-described embodiment, first, the stretch film roll 16 is attached to the roll support rod 5. Next, the portion of the packaged item 15 to be wrapped in stretch film is supported in a floating state within the annular inner space 2a using the packaged item support base 30a or packaged item support base 30b, etc.

[0078] The leading edge of the stretch film 16a unwound from the stretch film roll 16 is brought into contact with the outer circumference of the item to be packaged 15, and the driving force applied by the driving means 4 is initiated to cause the annular body 2 to rotate in the circumferential direction indicated by the arrow 100. This allows the stretch film 16a unwound from the stretch film roll 16 mounted on the roll support rod 5 to be wrapped around the outer circumference of the item to be packaged 15, thereby performing stretch packaging.

[0079] If necessary, the packaged object 15 can be moved in the front-to-back direction or other directions within the annular inner space 2a to change the position to which the stretch film 16a is wrapped.

[0080] Once the wrapping of the stretch film 16a is complete, the application of driving force by the driving means 4 is stopped, the stretch film 16a is cut, and the packaged item with the stretch film wrapped around it is removed from the annular inner space 2a.

[0081] A stretch film roll 16 is a roll in which stretch film 16a is wound around a hollow, cylindrical core, and has been conventionally available on the market in this field. The size of the stretch film roll 16 used can be changed in various ways depending on the packaged item to which the stretch film is wound. For example, a roll in which a long stretch film 16a with a wall thickness of about 4μ to 25μ and a width (size in the direction in which the roll support rod 5 extends longitudinally in Figure 1) of about 50mm to 1000mm is wound around a hollow, cylindrical core with an inner diameter of about 1 to 3 inches (25.4mm to 76.2mm) can be used as the stretch film roll 16 described above.

[0082] Although an example of an embodiment of the present invention has been described above with reference to the attached drawings, the present invention is not limited to the embodiments described above, and can be modified in various ways within the technical scope as understood from the claims.

[0083] For example, in the above, an endless drive belt 8 is stretched between the large drive pulley 7a and the outer rotating guide rollers 6b, 6a. At the positions of the outer rotating guide rollers 6b, 6a, the drive belt 8 contacts the outer circumference 2c of the annular body 2, causing the annular body 2 to rotate in the direction indicated by arrow 100.

[0084] Alternatively, an endless drive belt 8 can be stretched between the large drive pulley 7a and the outer rotating guide rollers 6b, 6a, 6d, and 6c, so that the drive belt 8 contacts the outer circumference 2c of the annular body 2 at each of the positions of the outer rotating guide rollers 6b, 6a, 6d, and 6c, thereby providing a driving force that causes the annular body 2 to rotate in the direction indicated by the arrow 100 at each of the positions of the outer rotating guide rollers 6b, 6a, 6d, and 6c.

[0085] Furthermore, the above describes the process of placing the packaged object 15 on the packaged object support bases 30a and 30b as shown in Figure 6, moving it as indicated by the arrow 103 in Figure 6 to position it within the annular inner space 2a, and then, as shown in Figure 7, wrapping the stretch film 16a around the outer circumference of the portion of the packaged object 15 that is located within the annular inner space 2a.

[0086] In this process, by moving the packaged object 15 in a direction perpendicular to the direction in which the packaged object support bases 30a and 30b extend, that is, in the direction in which the rotational axis indicated by the symbol R in Figure 2 extends, the stretch film 16a can be wrapped around the entire length of the long packaged object 15.

[0087] Furthermore, by performing the process illustrated in Figure 7 while moving the object to be packaged, which is initially placed on the object support base 30b, toward the object support base 30a, that is, toward the direction in which the rotational axis indicated by the symbol R in Figure 2 extends, the stretch film 16a can be wrapped around the entire length of the long object to be packaged 15.

[0088] In this way, the stretch film can be wrapped around the outer circumference of various packaged objects, as long as they are of a size that can be located within the inner space 2a of the annular body 2 in the radial direction. Examples of packaged objects to which the stretch film 16a is wrapped around the outer circumference include annular objects such as tires, electric wires, hoses, and belts, as well as long objects such as building materials, lumber, pipes, and bolts.

[0089] In the example described above, the annular body 2 and the annular body support 3, as well as the packaged item support bases 30a and 30b, were supported by a common base 20.

[0090] Furthermore, the base 20 is placed on the floor so as to be movable by casters 21a, 21b, 21c, and 21d. This embodiment involves moving the base 20 to a predetermined position and, at that position where the stretch film packaging process is to be performed, fixing the position of the casters 21a to 21d with stoppers (not shown) to perform the stretch film packaging process.

[0091] Alternatively, the support that supports the annular body 2 and the annular body support 3 and the support that supports the packaged item support bases 30a and 30b can be made into separate components. The support that supports the packaged item support bases 30a and 30b can be moved to the position of the support that supports the annular body 2 and the annular body support 3 as needed, thereby creating a configuration that supports the packaged item.

Claims

1. A C-shaped annular body that rotates in a circular motion around a central axis of rotation, wherein a predetermined region in the circumferential direction is a circumferential gap where the region is not continuous, A drive unit that provides a driving force to the annular body to cause the annular body to perform the rotational motion in the circumferential direction, The roll support rod supported by the annular body and It is equipped with, By rotating the annular body in the circumferential direction, the stretch film unwound from the stretch film roll mounted on the roll support rod is wrapped around the outer circumference of the packaged item located in the annular body's inner space, which is a space formed radially inward of the annular body. Stretch film packaging device.

2. The annular body is rotatably supported by an annular body support. The annular support body has an annular support body space at a position corresponding to the annular inner space, and an annular support body space having a size corresponding to the annular inner space, and also has an annular circumferential void that communicates with the annular support body space and has a size in the circumferential direction corresponding to the size in the circumferential direction of the circumferential void. The stretch film packaging apparatus according to claim 1.

3. The stretch film packaging apparatus according to claim 2, wherein the annular support is rotatably supported with respect to the annular support, and each of the annular support is a roller that contacts the outer circumference of the annular body and guides the rotational motion, and comprises a plurality of outer rotating guide rollers arranged at a predetermined circumferential distance from each other in the circumferential direction.

4. The stretch film packaging apparatus according to claim 2 or 3, wherein the annular support body comprises a plurality of inner rotating guide rollers, each rotatably supported with respect to the annular support body and each roller contacting the inner circumference of the annular body to guide the rotational motion, and arranged at a predetermined circumferential distance from each other in the circumferential direction.

5. The stretch film packaging apparatus according to claim 2, wherein the packaged object support base, which supports the portion of the packaged object to be wrapped around the outer circumference of the stretch film in a floating state within the inner space of the annular body, is positioned in front of and / or behind the annular body support in the front-to-back direction, which is the direction in which the rotational axis extends, with the annular body support in between.

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