JP3206955U - Stretch film winding operation tool - Google Patents

Abstract

Disclosed is a stretch film winding operation tool that prevents the roll body of a stretch film from falling off and can be easily operated. A stretch film winding operation tool that is inserted into a hollow portion of a stretch film to support a stretch film having a cylindrical shape, and a portion that a user grips when the user supports the stretch film A gripping portion having an outer dimension that can be stored in the palm, and an insertion portion that protrudes from the gripping portion and is inserted into a hollow portion of the stretch film to fix the stretch film. The insertion portion is a hollow portion of the stretch film. If the direction of insertion into the axial direction is a positive direction, the cross section perpendicular to the axial direction at the tip is divided into a plurality of parts, and it has a cracked structure that can be elastically deformed radially inward, and the outer peripheral surface of the insertion part Stretch film winding operation tool characterized in that it has at least one projecting portion projecting in the radial direction and annular in the circumferential direction. To provide. [Selection] Figure 1

Description

  This invention relates to the stretch film winding operation tool which uses the synthetic resin film used for a to-be-packaged object for a manual winding use.

  Conventionally, many stretch film wrapping operation tools for manually winding and wrapping a stretch film have been disclosed, and are provided as commercial products or sales promotion articles for stretch films (for example, Patent Document 1 (paragraph (0005) to (0007)) Fixing of the packing material by the stretch film is performed by grasping both ends of the roll body R of the stretch film with both hands and winding the film around the packing material in a state in which the film is set substantially vertically. Therefore, it is desirable to be lightweight and easy to handle.In addition, if an accident occurs in which the roll body R of the stretch film comes off and falls from the stretch film winding operation tool, the stretch film F may be damaged. This can cause problems such as contamination from floor dust and sewage. It is necessary to prevent the cause.

  FIG. 7 shows a conventional stretch film winding operation tool 1. The stretch film winding operation tool 1 is inserted along the inner peripheral surface of the paper tube P on the central axis of the roll body R of the stretch film. At this time, the stretch film winding operation tool 1 includes an inner cylinder 120 and an outer cylinder 130 that are rotatable with respect to each other. The user operates the stretch film roll body R by inserting a finger into the handle slot 140.

Japanese Patent Laid-Open No. 08-119242

National Institute of Advanced Industrial Science and Technology, [online], AIST Japanese hand dimension data> statistics, [searched July 22, 2016], Internet (URL: https: //www.dh.aist. go.jp/database/hand/data/list.html)

  However, since the inner diameter dimension of the paper tube P and the dimension of the outer cylinder 130 in the stretch film winding operation tool 1 shown in FIG. 7 vary, when the stretch film winding operation tool 1 is inserted into the paper tube P, On the contrary to the tight case, it may be loose and the fitting condition is not constant. When the fitting condition is tight, it is difficult to mount the stretch film winding operation tool 1 on the paper tube P, and the mounting property is deteriorated. Further, it is difficult to rotate the paper tube P around the stretch film winding operation tool 1 for use, and even if it is rotated, the paper tube P is shaved and dust is generated. On the other hand, when the degree of fitting is loose, the stretch film winding operation tool 1 falls out of the paper tube P during the winding work, and the workability is lowered, for example, the roll body R of the stretch film falls.

  In view of such circumstances, the present invention is intended to provide a stretch film winding operation tool that prevents the roll body R of the stretch film from falling off and can be easily operated.

  (1) The present invention is a stretch film winding operation tool that is inserted into a hollow portion of the stretch film in order to support a stretch film having a cylindrical shape, and when the user supports the stretch film. A grip portion having an outer dimension that can be held in the palm of the user, and an insertion portion that protrudes from the grip portion and is inserted into the hollow portion of the stretch film to fix the stretch film. When the insertion portion is inserted in the hollow portion of the stretch film as a positive direction in the axial direction, a cross section perpendicular to the axial direction at the tip end in the positive direction in the axial direction is divided into a plurality of portions, It has a tip crack structure that can be elastically deformed radially inward, and the outer peripheral surface of the insertion portion has few protrusions that protrude in the radial direction and form an annular shape in the circumferential direction. Providing stretch film winding operation member, characterized in that it comprises one Kutomo.

  If the hollow part of the stretch film winding operation tool and the stretch film roll body are completely fixed, it is inconvenient when the film is unwound, and conversely, the stretch film winding operation tool is used for the stretch film roll body. If it is easy to fall off from the hollow portion, it will cause damage to the film and contamination as described above. According to the device described in (1) above, since the distal end of the insertion portion that is inserted into the hollow portion of the stretch film and fixes the stretch film has a tip crack structure that can be elastically deformed radially inward, the insertion portion By exerting a force radially inward on 20 to reduce the outer diameter of the tip, the stretch film winding operation tool 1 can be easily inserted into the hollow portion of the stretch film.

  In addition, by realizing a state in which the protrusions provided on the outer peripheral surface of the insertion portion are mainly in contact with the inner peripheral surface of the roll body of the stretch film, the roll body of the stretch film can be freely moved when the film is fed out by reducing friction. There is an effect that it is easy to rotate around the stretch film winding operation tool. At the same time, the projecting part pushes in or slightly cuts the paper tube that forms the hollow part of the stretch film to create an annular groove, and the projecting part fits into it, so that the stretch film winding operation tool is stretched. There is a remarkable effect of making it difficult to drop off from the roll body of the film.

  (2) In the present invention, the grip portion has a recess having an inner diameter that extends in the axial direction and has at least one finger inserted therein, and the edge of the opening edge in the negative direction in the axial direction inside the recess. The stretch film winding operation tool according to the above (1) is provided, wherein the portion is provided with an inclined surface that expands radially outward as it proceeds in the negative direction in the axial direction.

  The roll body of the stretch film is often operated by putting fingers in the hollow portions at both ends. If the stretch film wrapping operation tool is not devised, the user's fingers rub against the ridges on the inner surface of the roll, causing injury. According to the device described in the above (2), the inclined surface that expands radially outward as it proceeds in the negative direction in the axial direction is formed on the ridge portion of the opening edge in the negative direction in the axial direction inside the concave portion inside the grip portion. By providing, it prevents the fingers from rubbing and has the effect of improving operability.

  (3) The stretch film winding according to (1) or (2), wherein the insertion portion is hollow, and the concave portion continues to the inner circumference of the insertion portion without a step. A hanging operation tool is provided.

  According to the device described in the above (3), since the insertion portion is hollow, there is an effect that it is lightweight and easy to handle. In addition, since the concave portion into which the finger is inserted continues to the inner periphery of the insertion portion without a step, there is an effect that the possibility of damaging the finger due to friction or the like is reduced.

  (4) In the present invention, the insertion portion has a plurality of sections arranged in the axial direction, each having a different gradient of the outer peripheral surface with respect to a positive direction in the axial direction. The stretch film winding operation tool according to any one of the above (1) to (3), wherein the gradient of the section including the tip of the section is smaller than the gradient of the other sections. .

  According to the device described in (4) above, the section including the distal end of the insertion portion has a gradient between the outer peripheral surface and the positive axial direction between the outer peripheral surface of the other section and the positive axial direction. Since it is smaller than the gradient, there is an effect that the insertion portion can be easily inserted into the hollow portion of the stretch film.

  (5) In the present invention, at least one of the plurality of sections of the insertion portion has a positive gradient between the outer peripheral surface and the positive direction in the axial direction, and the tip crack structure is radially inward. By pressing, it is possible to make the outer diameter of the insertion portion smaller than the inner diameter of the hollow portion of the stretch film and release the force inward in the radial direction with respect to the cracked structure, the insertion portion When the insertion portion is inserted into the stretch film hollow portion, the outer peripheral surface of the insertion portion is the inner periphery of the stretch film hollow portion. The stretch film winding operation tool according to (4) above, wherein the surface is pushed outward in the radial direction.

  According to the device described in (5) above, at least one of the plurality of sections of the insertion portion has a positive gradient between the outer peripheral surface and the positive axial direction, and the outer diameter is the gripping portion. It has a structure that expands from the side toward the tip. Since the outer diameter of the insertion portion can be made smaller than the inner diameter of the hollow portion of the stretch film by pressing the cracked structure radially inward, the insertion portion can be easily inserted into the hollow portion of the stretch film. . Further, when the force inward in the radial direction against the cracked structure is released, the outer diameter of the insertion portion tends to be larger than the inner diameter of the hollow portion of the stretch film, so that the insertion portion is inserted into the stretch film hollow portion. Since the outer peripheral surface of the insertion portion pushes the inner peripheral surface of the stretch film hollow portion radially outward, a frictional force is generated between the inner peripheral surface of the hollow portion of the stretch film and the outer peripheral surface of the insertion portion. There is an effect that the film is difficult to fall from the stretch film winding operation tool.

  (6) The stretch according to (4) or (5) above, wherein the gradient between the outer peripheral surface of the section including the tip of the insertion portion and the positive axial direction is zero degrees. A film winding operation tool is provided.

  According to the device described in (6) above, when the tip crack structure is pressed inward in the radial direction, the angle formed by the outer peripheral surface of the tip portion with the axis becomes negative. There is an effect that it can be easily inserted when inserted into the cable.

  (7) In the invention, any one of the above (1) to (6) is characterized in that an axial length of a section including a tip of the insertion portion is 1 mm or more and 2 cm or less. The stretch film winding operation tool described above is provided.

  According to the device described in the above (7), it is easy to insert into the hollow portion of the stretch film. In addition, the angle formed by the outer peripheral surface of the tip is smaller than the other sections, and the part where the force to push the hollow part of the stretch film from the inside is not too wide. There is an effect that it is difficult to come off the part.

  (8) The present invention provides the stretch film winding operation tool according to any one of the above (1) to (7), wherein the thickness of the insertion portion is approximately 2 mm.

  According to the device described in (8) above, it is easy to insert the insertion portion into the hollow portion of the stretch film by shrinking the outer diameter of the insertion portion with fingers, and the insertion portion is made of the stretch film. There exists an effect that the stretch film winding operation tool which becomes difficult to come off by expanding radially outside in the hollow part can be realized.

  According to the stretch film winding operation tool according to claims 1 to 8 of the present invention, there is provided a stretch film winding operation tool that can be easily inserted into the hollow portion of the roll body of the stretch film and is not easily dropped from the roll body of the stretch film. Realized and can achieve an extremely excellent effect of improving operability.

(A) It is a perspective view of the stretch film winding operation tool which concerns on 1st embodiment of this invention. (B) It is sectional drawing of a stretch film winding operation tool. (A) It is a side view of a stretch film winding operation tool. (B) It is the enlarged view to which the cross section of the insertion part was expanded partially. (C) It is the rear view which looked at the stretch film winding operation tool from the holding part side. It is explanatory drawing explaining the procedure which inserts a stretch film winding operation tool in the hollow part of the roll body of a stretch film. It is explanatory drawing explaining the effect | action of the projection part provided in the insertion part. It is explanatory drawing explaining the usage condition of the stretch film winding operation tool which concerns on 1st embodiment of this invention. (A) It is a perspective view of the stretch film winding operation tool which concerns on 2nd embodiment of this invention. (B) It is the front view which looked at the stretch film winding operation tool from the front end side of the insertion part. It is sectional drawing of the conventional stretch film winding operation tool.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1-6 is an example of the form which implements invention, In the figure, the part which attached | subjected the same code | symbol represents the same thing.

  FIG. 1A shows a perspective view of a stretch film winding operation tool 1 according to the first embodiment of the present invention. The stretch film winding operation tool 1 is a stretch film winding operation tool 1 that is inserted into the hollow portion of the stretch film F in order to support the roll body R of the stretch film F that has a tubular shape. Therefore, when the user supports the stretch film F, the grip portion 10 is gripped by the user and has an outer dimension that can be stored in the palm of the hand. The hollow portion of the stretch film F is formed by protruding from the grip portion 10. And an insertion portion 20 for fixing the stretch film F. The insertion portion 20 is hollow and has a cylindrical shape with a length protruding from the gripping portion 10 of 20 cm or less. Since the roll body R of the stretch film is usually about 50 cm in length, when the stretch film winding operation tool 1 is inserted from both ends thereof, a length that does not interfere with each other is desirable. The material of the stretch film wrapping operation tool 1 is preferably a synthetic resin that is light, has good workability, and has excellent wear resistance, such as polyethylene, polyethylene terephthalate, and ABS resin.

  The outer periphery of the gripping part 10 is, for example, a rounded rectangle, the length in the major axis direction is 50 mm or more and 100 m or less, and the length in the minor axis direction is preferably 20 mm or more and 75 mm or less. According to Non-Patent Document 1, the width of the Japanese hand, that is, the fingers and palms are stretched, the second to fifth fingers are aligned, and the thumb is placed on the most thumb side of the second metacarpal head. The average of the straight line distance from the protruding point to the point protruding to the little finger side of the fifth metacarpal head is 79.8 mm on average for both men and women. It can be seen that the length of 10 in the long axis direction is preferably 50 mm or more and 100 m or less. According to the above database, the third finger of the palm length of the Japanese hand, that is, the finger and palm are extended, the thumb is abducted, and the other four fingers are aligned. Since the average length measured up to the wrinkle of the middle finger parallel to the long axis of the hand is 102.1 mm, the length of the gripping part 10 in the short axis direction is required to grip the gripping part 10 with the palm. It is understood that 20 mm or more and 75 mm or less are desirable.

  When the insertion portion 20 defines the direction of insertion into the hollow portion of the stretch film F as a positive direction in the axial direction (see the direction of the straight arrow in FIG. 1A), the cross section perpendicular to the axial direction at the distal end portion 40 is The slit 50 is divided into a plurality of parts, that is, divided into two parts in the first embodiment, thereby forming a tip crack structure that can be elastically deformed radially inward.

  The outer peripheral surface of the insertion portion 20 has at least one projecting portion 100 that protrudes in the radial direction and has an annular shape in the circumferential direction, in the first embodiment, three.

  FIG. 1B shows a cross-sectional view of the stretch film winding operation tool 1 in the plane S of FIG. The grip 10 has a strain avoidance hole 70 for reducing the amount of resin and avoiding molding strain. Further, the end is rounded so that the palm does not hurt when grasped by hand.

  The gripping portion 10 has a recess 60 that extends in the axial direction and has an inner diameter that allows at least one finger to enter. The ridge portion of the opening edge in the axially negative direction inside the recess 60 has an axial direction. An inclined surface 90 is provided that expands radially outward as it proceeds in the negative direction. Although the hollow part 80 is continuously formed in the recessed part 60, the internal peripheral surface of the hollow part 80 is also made into the shape which prevents the injury by friction. That is, the recess 60 continues to the inner periphery of the insertion portion 20 without a step. It is desirable that the surface continuous from the inclined surface 90 to the inner peripheral surface of the hollow portion 80 is formed smoothly.

  The protrusion portion 100 is provided on the outer peripheral surface of the insertion portion 20, and there is an effect that the insertion portion 20 is not easily dropped from the paper tube P as will be described later.

  FIG. 2A is a side view of the stretch film winding operation tool 1. The insertion portion 20 of the stretch film wrapping operation tool 1 includes a base portion 25 that is a plurality of sections having different gradients between the outer peripheral surface and the positive axial direction, a main body portion 30 and a distal end portion 40 in the axial direction. Of the plurality of compartments, the slope of the compartment including the tip 40 is smaller than the slope of the other compartments. Specifically, the main body 30 forms a section with a large gradient, and the root portion 25 and the tip section 40 form a section with a small gradient.

  In addition, the insertion portion 20 is provided with a slit 50 that widens from the grip portion 10 side to the distal end portion 40 side. As for the size of the slit, the width D1 of the tip open portion of the tip portion 40 is, for example, approximately 5 mm, and the width D2 on the gripping portion side is, for example, approximately 1 mm. By providing the slit 50 having such a shape, when the distal end portion 40 side is pushed inward with a finger, the elastic deformation can be greatly performed, and the insertion portion 20 can be easily inserted into the stretch film hollow portion 7. Play.

  FIG. 2B is an enlarged view of a part of the section of the insertion portion 20. The insertion portion 20 includes a root portion 25, a main body portion 30, and a distal end portion 40. In the root portion 25, the gradient between the outer peripheral surface and the positive axial direction is zero degrees. The main body portion 30 has a positive gradient between the outer peripheral surface and the positive axial direction (angle θ in FIG. 2A), and presses the tip-breaking structure radially inward, so It is possible to make the diameter smaller than the inner diameter of the stretch film hollow portion 7. Moreover, when the force toward the radially inner side with respect to the cracked structure is released, the outer diameter of the insertion portion 20 tends to be larger than the inner diameter of the stretch film hollow portion 7, so that the outer peripheral surface of the insertion portion 20 is the stretch film hollow portion 7. The inner peripheral surface is pushed outward in the radial direction. Then, the frictional force between the outer peripheral surface of the insertion portion 20 and the inner peripheral surface of the stretch film hollow portion 7 is generated, and the stretch film 5 has an effect of making it difficult for the stretch film winding operation tool 1 to come off.

  The gradient between the outer peripheral surface of the section including the tip 40 and the positive axial direction is zero degrees. By adopting such a structure, when the cracked structure is pressed radially inward, the angle formed by the outer peripheral surface of the tip portion 40 and the axis becomes negative, so the tip portion 40 is formed of the stretch film hollow portion 7. Compared to the inner diameter, the insertion portion 20 is easily reduced when the insertion portion 20 is inserted into the stretch film hollow portion 7. The length in the axial direction of the distal end portion 40 of the insertion portion is desirably 1 mm or more and 2 cm or less.

  Note that the thickness of the insertion portion 20 is desirably about 2 mm. With such a thickness, it is easy to insert the insertion portion 20 into the stretch film hollow portion 7 by pushing the outer diameter of the insertion portion 20 with a finger and shrinking it radially inward, and the force of the finger can be reduced. After the release, the stretch film wrapping operation tool 1 that is difficult to come off from the stretch film 5 can be realized by expanding the insertion part 20 radially outward in the stretch film hollow part 7.

  FIG. 2C is a rear view of the gripping unit 10 viewed from the side opposite to the side where the insertion unit 20 is located. The outer edge portion 55 is rounded so as not to damage the palm. On the inner side of the grip portion 10, there is a recess 60 that is thinned about 5 mm from the outer edge portion 55 in the thickness direction of the grip portion 10. The concave portion 60 is provided with an inclined surface 90 connected to the hollow portion 80 and a strain avoidance hole 70. An inclined surface 90 is provided on the inner side of the concave portion 60, that is, on the ridge portion of the inner peripheral edge connected to the hollow portion 80 so as not to damage the finger. A strain avoidance hole 70 is provided on the radially outer side of the inclined surface 90. In FIG. 2B, the strain avoidance hole 70 is provided so as to form four arc-shaped grooves, but it may be a single annular groove. By providing such a strain avoidance hole 70, it becomes possible to reduce the amount of resin for molding the stretch film winding operation tool 1, and it is possible to reduce the weight, and to avoid distortion during molding. it can.

  Next, how to attach the stretch film winding operation tool 1 to the stretch film winding operation tool 1 will be described.

  FIG. 3 is an explanatory diagram for explaining a procedure for inserting the insertion portion 20 of the stretch film winding operation tool 1 into the stretch film hollow portion 7. FIG. 3 (A) shows the relationship between the stretch film winding operation tool 1 before mounting and the roll body R of the stretch film. The insertion part 20 of the stretch film winding operation tool 1 includes a root part 25, a main body part 30, and a tip part 40 in order from the gripping part 10 side. As for the main-body part 30, the gradient between the outer peripheral surface of the insertion part 20 and an axial direction positive direction is positive. Therefore, the outer diameter at the distal end portion 40 of the insertion portion 20 is larger than the inner diameter of the paper tube 9 in the stretch film hollow portion 7. In addition, as for the front-end | tip part 40, the gradient between an outer peripheral surface and an axial direction positive direction is zero degree. The insertion portion 20 has a tip crack structure in which a cross section of a plane perpendicular to the axial direction at the distal end portion 40 is divided into two portions and can be elastically deformed radially inward.

  Now, it is assumed that force is applied to the insertion portion 20 with fingers or the like as indicated by an arrow. FIG. 3B illustrates a state in which the distal end portion 40 of the insertion portion 20 is elastically deformed radially inward with fingers or the like. After the elastic deformation, the tip 40 has a negative gradient between the outer peripheral surface and the positive axial direction, so the outer diameter of the tip 40 is smaller than the inner diameter of the stretch film hollow part 7, and the insertion part is When inserting into the hollow part of a stretch film, there exists an effect that it can insert easily. In this state, the insertion portion 20 is inserted into the stretch film hollow portion 7 in the direction of the arrow.

  FIG. 3C illustrates a state after the insertion portion 20 is inserted into the stretch film hollow portion 7. The main body portion 30 and the distal end portion 40 of the insertion portion 20 are released from the force that has been elastically deformed radially inward. Then, the outer diameter of the insertion portion 20 tends to be larger than the inner diameter of the stretch film hollow portion 7 so that the outer peripheral surface of the insertion portion 20 pushes the inner peripheral surface of the stretch film hollow portion 7 radially outward. A frictional force is generated between 20 and the stretch film hollow portion 7. Therefore, there is an effect that the stretch film 5 is difficult to drop from the stretch film winding operation tool 1.

  FIG. 4 is an explanatory diagram for explaining the action of the protrusion provided on the insertion portion. FIG. 4A shows a state immediately after the insertion portion 20 is inserted into the stretch film hollow portion 7. Since the protrusion 100 protrudes outward in the radial direction, the protrusion 100 mainly contacts the inner peripheral surface 155 of the paper tube in the outer peripheral surface of the insertion portion 20. In that case, since the area of the protrusion 100 is smaller than the entire outer peripheral surface of the insertion portion 20, the frictional force is smaller than that without the protrusion 100. Therefore, there is an effect that the work of rotating the roll body R of the stretch film together with the paper tube 9 can be easily performed while the stretch film winding operation tool 1 is fixed with fingers.

  FIG. 4B shows a state after the insertion portion 20 is inserted into the stretch film hollow portion 7 and the operation is performed for a while. It is assumed that the operation of rotating the roll body R of the stretch film together with the paper tube 9 is repeated while the stretch film winding operation tool 1 is fixed with fingers. Then, a portion corresponding to the protruding portion 100 of the inner peripheral surface 155 of the paper tube is pushed, and a groove 160 formed in the paper tube is formed. Then, the roll body R of the stretch film is less likely to be detached from the stretch film winding operation tool 1, and a state in which a frictional force between the insertion portion 20 and the paper tube P is obtained is obtained, and work efficiency is further increased. Has a remarkable effect.

  FIG. 5 is an explanatory diagram for explaining a usage mode of the stretch film winding operation tool 1. As shown in FIG. 5A, two stretch film wrapping operation tools 1 are prepared, inserted into both ends of the stretch film hollow portion 7 in the direction of the arrow, and fixed as shown in FIG. 5B. As shown in FIG. 5 (C), the operator holds each of the gripping portions 10 fixed to both ends of the roll body R of the stretch film with the palm and stretches the stretch film 5 to thereby stretch the stretch film for the work target. 5 is wound. At this time, since the outer edge portion 55 of the grip portion 10 is rounded, there is an effect of reducing the possibility that the operator will be injured. In FIG. 5C, the fingers are not inserted into the hollow portion 80 of the stretch film winding operation tool 1. However, in the case of using a method of inserting the fingers into the hollow portion 80 and rotating the roll body R of the stretch film together with the paper tube 9, since the inclined surface 90 of the hollow portion 80 exists, the fingers of the operator are rubbed. The possibility of hurting is reduced.

  2, 3, and 5, the illustration of the protrusion 100 is omitted for explanation.

  In FIG. 6, 2nd embodiment of the stretch film winding operation tool 1 which concerns on this invention is shown. FIG. 6A is a perspective view of the stretch film winding operation tool 1. The stretch film winding operation tool 1 includes a gripping part 10 and an insertion part 20, and the insertion part 20 has a root part 25, a main body part 30, and a tip part 40. Assuming that the insertion portion 20 is inserted in the stretch film hollow portion 7 in a positive direction in the axial direction, the cross section of the plane perpendicular to the axial direction at the distal end portion 40 is divided into four portions, and is directed radially inward. It has a cracked structure that can be elastically deformed. That is, the insertion part 20 has four pressing pieces 110 and four slits 50 between them. Since each of the pressing pieces 110 becomes thin, there is an advantage that less force is required to reduce the outer diameter of the distal end portion 40 by pushing inward in the radial direction.

  FIG. 6B shows a front view of the stretch film winding operation tool 1 as viewed from the distal end portion 40 side of the insertion portion 20. The insertion part 20 has four pressing pieces 110 and includes four slits 50 between them, and is formed continuously from the grip part 10.

  In addition, about the tip crack structure of the insertion part 20, the division | segmentation number, ie, the number of the press pieces 110, may be three and may be five or more. Moreover, when the insertion part 20 is provided with only one slit and the insertion part 20 is pushed in so as to wrap from the radially outer side to the inner side, the outer diameter of the distal end part 40 may be made smaller than the inner diameter of the stretch film hollow part 7. A possible structure may be adopted.

  In addition, the stretch film winding operation tool of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Stretch film winding operation tool 5 Stretch film 7 Stretch film hollow part 9 Paper tube 10 Holding part 20 Insertion part 25 Root part 30 Main body part 40 Tip part 50 Slit 55 Outer edge part 60 Recessed part 70 Strain avoidance hole 80 Hollow part 90 Chamfer part DESCRIPTION OF SYMBOLS 100 Protrusion part 110 Pressing piece 120 Inner cylinder 130 Outer cylinder 140 Long hole for handle 150 Bottom face of inner cylinder 155 Inner peripheral surface of paper tube 160 Groove formed in paper tube R Stretch film roll body P Paper tube

Claims (8)

A stretch film wrapping operation tool inserted into a hollow portion of the stretch film in order to support a stretch film having a cylindrical shape,
When the user supports the stretch film, the gripping part is a part gripped by the user and has an outer dimension that can be stored in the palm,
It is formed to protrude from the grip part, and includes an insertion part that is inserted into a hollow portion of the stretch film and fixes the stretch film,
When the insertion direction of the insertion portion into the hollow portion of the stretch film is a positive direction in the axial direction, a cross section perpendicular to the axial direction at the tip end in the positive direction in the axial direction is divided into a plurality of portions, It is a cracked structure that can be elastically deformed inward.
A stretch film wrapping operation tool characterized in that the outer peripheral surface of the insertion portion has at least one protrusion that protrudes in the radial direction and forms an annular shape in the circumferential direction.   The gripping portion has a concave portion that extends in the axial direction and has an inner diameter that allows at least one finger to enter. The ridge portion of the opening edge in the negative axial direction on the inner side of the concave portion has a negative axial direction. The stretch film winding operation tool according to claim 1, further comprising an inclined surface that expands radially outward as it proceeds in the direction.   The stretch film winding operation tool according to claim 1, wherein the insertion portion is hollow, and the concave portion continues without a step to an inner periphery of the insertion portion.   The insertion portion has a plurality of sections in which the gradients of the outer peripheral surfaces are different from each other with respect to the positive direction in the axial direction, arranged in the axial direction, and the section including the tip of the insertion section among the plurality of sections. The said gradient is smaller than the said gradient of another division, The stretch film winding operation tool as described in any one of Claims 1-3 characterized by the above-mentioned. At least one of the plurality of sections of the insertion portion has a positive gradient between the outer peripheral surface and the positive direction in the axial direction, and the insertion is performed by pressing the tip crack structure radially inward. It is possible to make the outer diameter of the part smaller than the inner diameter of the hollow part of the stretch film,
and,
When the force toward the inner side in the radial direction with respect to the cracked structure is released, the outer diameter of the insertion portion tends to be larger than the inner diameter of the hollow portion of the stretch film, so that the insertion portion is inserted into the stretch film hollow portion. The stretch film winding operation tool according to claim 4, wherein the outer peripheral surface of the insertion portion pushes the inner peripheral surface of the stretch film hollow portion radially outward.   The stretch film winding operation tool according to claim 4 or 5, wherein the gradient between the outer peripheral surface of the section including the distal end of the insertion portion and the positive direction in the axial direction is zero degrees.   The stretch film winding according to any one of claims 4 to 6, wherein an axial length of a section including a tip of the insertion portion is 1 mm or more and 2 cm or less. Operation tool.   The stretch film winding operation tool according to any one of claims 1 to 7, wherein a thickness of the insertion portion is approximately 2 mm.

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