JP3149426U - Roll product protector and packing material using it - Google Patents

Abstract

A protector and packaging material for roll product packaging that can prevent vertical vibrations of the roll product, are lightweight, have high strength, can be made of a single material, and are easy to manufacture. A rectangular cutout 18a formed in an upper half and a bottom portion of the cutout are formed between front and rear panels 11 and 12 each having a substantially U-shaped cutout groove 15 opening upward. An intermediate panel 19 having a semicircular cutout 19 that opens upward is formed to form a support member, and a gap between the front and rear panels 11 and 12 is formed in a rectangular cutout 18a of the intermediate panel. A protector 10 into which a holding panel 14 having a semicircular cutout 20 that opens downward is inserted. The front and rear panels 11 and 12 and the intermediate panel 19 are made of cardboard made of the same material. [Selection] Figure 1

Description

  The present invention relates to a protector that is attached to an end of a core tube to protect the end and the surface of the roll product when packing the roll product into a case, and a packing material using the protector. In the present specification, unless otherwise specified, the “end portion of the core tube” includes a “cap” inserted into the end portion of the core tube when the core tube does not protrude from the end portion of the roll. In addition, “cardboard” in the present specification includes not only paper cardboard but also synthetic resin cardboard (plastic cardboard) unless otherwise specified. In addition, paper corrugated cardboard is usually a laminated type with two or more intermediate layers bonded to each other through two corrugated intermediate layers (corrugated layers) between two flat paper surface layers. In addition to the corrugated cardboard, a so-called “honeycomb corrugated cardboard” in which corrugated intermediate layers are arranged at right angles to the surface layer is also included (see Patent Document 3). In addition to paper-made honeycomb cardboard, the same shape of synthetic resin-made honeycomb cardboard is also included.

  Synthetic resin films used for large liquid crystal panels and the like are shipped as roll products wound around a core tube. In this case, as shown in FIG. 9, a cylindrical member (cap) 103 made of synthetic resin is inserted into both ends of the core tube 102 so as not to damage the surface of the roll product 101, and a wire rope is passed through the core tube 102. Transport. At that time, a rectangular protector 105 having a circular hole 104 formed in the center is set on the core tube 102 or the cap 103. The protector 105 is fixed to the roll product 101 with a band made of synthetic resin such as polypropylene, and is accommodated in a cardboard case (see reference numeral 107 in FIG. 10) in this state. In this state, the protector 105 supports the weight of the roll product 101, so that the periphery and both ends of the roll product 101 do not touch the inner surface of the case 107 and are not damaged.

  As such a protector 105, as shown in the lower right of FIG. 9, a wooden or synthetic resin panel main body 108 having a circular opening 104a formed at the center, and the inner surface of the panel main body (the side in contact with the roll product) And a pad (pad) 109 made of corrugated cardboard (made of paper or synthetic resin) is used. A circular opening 104 b is also formed at the center of the pad 109. A plywood or medium density fiber board is used for the wooden panel main body 108. For example, two pieces of plywood having a thickness of 15 mm cut to a predetermined size are bonded together, and the central opening 104a is punched. In the case of a synthetic resin, it is molded into a shape having a central opening. The pad 109 is similarly formed by cutting and punching cardboard.

  On the other hand, a packaging material composed of a bottom member that also serves as a pallet that is conveyed by a forklift and left and right support plates that store the roll product in a suspended state has been proposed (Patent Document 1). In this device, a support plate having a substantially U-shaped cutout at the upper end is connected to the bottom member in a foldable manner, and the left and right support plates are connected by side walls. The entire packing material is composed of cardboard provided with a water-resistant coat. A plurality of cardboards are stacked and bonded with a water-resistant adhesive.

  Further, Patent Document 2 discloses a frame-structured roll accommodation box in which left and right side walls are engaged with a bottom member and upper ends of the side walls are connected by a cover. This is formed with a substantially U-shaped notch groove that opens upward from the upper end of the side wall to a substantially central portion, and the side wall also serves as a support plate. This product has a large opening on the front and back due to the structure of production and assembly, and lacks sealing performance. Also, the inside and outside communicate with each other through a notch groove on the side wall. Patent Document 3 discloses a honeycomb corrugated cardboard.

JP 2002-104412 A JP 2003-54557 A Japanese Patent Laid-Open No. 10-230938

  Since the protector 105 shown in FIG. 9 uses the wooden panel main body 108, the strength is sufficient. In addition, since the core tube 102 is supported by the central circular opening 104 via the cap 103, it is possible to prevent vertical vibration of the roll product 101 during transportation or transportation. However, if the core tube 102 is lifted by a wire rope, the protector 105 cannot be inserted into the core tube 102. Therefore, for example, as shown in FIG. 10, a steel pipe 110 or the like is inserted into the core tube 102, and both ends of the pipe 110 are lifted by the wire rope 111 (hanging step S1), and then the core tube 102 is grounded or floored. The protector 105 is attached to the core tube 102 (attachment step S3). Further, both ends of the steel pipe 110 or the core tube 102 are lifted by the wire rope 111 and accommodated in the cardboard case 107 (accommodating step S4). After storage, the pipe 110 is removed and the lid 107a is closed. The lid 107a and the side wall 107b of the cardboard case 107 are provided with a notch or an opening / closing door so that the pipe 110 can be passed therethrough.

  Thus, in the conventional protector 105, since the roll product 101 is once mounted on the support member 112 and then the protector 105 is mounted on the core tube 102, handling is extremely complicated. The same applies when the roll 101 is removed from the cardboard case 107. Furthermore, the conventional protector 105 is heavier than corrugated cardboard and the like, and the manufacturing process such as drilling and bonding is complicated. Further, since a plurality of materials of the panel main body 108 and the cardboard pad 109 are combined, it is necessary to separate them at the time of disposal, which is complicated.

  On the other hand, the pallet-use box of Patent Documents 1 and 2 is entirely cardboard, so it is lightweight and does not need to be disposed of separately. Anxiety remains. Also, it is not easy to attach and assemble a large number of cardboards.

  The present invention provides a protector and packaging material for roll product packaging that can prevent vertical vibration of the roll product, is easy to attach to and detach from the core tube, has high strength, and is lightweight and easy to manufacture. Is a technical issue.

  A protector according to the present invention (Claim 1) is a protector attached to an end of a core tube of a roll product, and has a rectangular shape when viewed from the front, and a flat cylindrical shape that opens at the upper end. A support member having an arc-shaped receiving portion that fits into the core tube at a substantially central portion of the front surface, and a guide groove that passes the core tube from the upper end to the receiving portion; and an opening at the upper end of the support member It is characterized by comprising a holding panel that is slidably inserted and closes the guide groove in a state where a substantially circular opening is left in the receiving portion.

  In such a protector, it is preferable that the guide groove linearly extends downward from the center of the upper end to the receiving portion (claim 2). Further, the guide groove may extend downward from a position near the left or right of the upper end, and may extend from the middle to the receiving portion by changing its direction obliquely downward or laterally toward the receiving portion. (Claim 3).

  Further, the support member has front and rear panels arranged through a gap, and an intermediate panel provided with a notch that opens upward so that a substantially lower half of the gap matches the receiving part or the guide groove. The left and right sides of the upper half of the gap are further filled with a substantially rectangular upward projecting portion of the intermediate panel, and the presser panel is the upper half of the gap, and the upper and lower sides between the upward projecting portions. It is preferably slidably accommodated, and is preferably configured such that the front and rear panels and the left and right upward projecting portions form a flat cylindrical shape in the front and rear. In that case, it is preferable to further include a cylindrical sleeve that integrally fastens the front and rear panels and the intermediate panel, and the sleeve is formed with a notch groove that matches the receiving portion and the guide groove. Item 5).

  On the other hand, the support member has front and rear panels arranged through a gap, and a substantially lower half of the gap has a semicircular notch that opens upward to match the receiving part or the guide groove. A cylindrical sleeve for integrally fastening the front and rear panels and the intermediate panel, and the sleeve is formed with a notch groove that matches the receiving portion and the guide groove. The holding panel is slidably accommodated between a substantially upper half of the gap between the front and rear panels and the left and right portions of the sleeve, and the front and rear panels and the left and right portions of the sleeve A flat cylindrical form may be constituted (claim 6).

  In any of the protectors, it is preferable that the support member and the pressing panel are made of paper or synthetic resin cardboard, and each member is made of the same material. In the case of a protector having a sleeve, it is preferable that the support member, the pressing panel, and the sleeve are made of paper or synthetic resin cardboard, and each member is made of the same material. 8). The roll material packaging material of the present invention (Claim 9) is characterized by comprising a rectangular parallelepiped case and any one of the protectors disposed on the opposing inner surfaces of the case.

  In the protector of the present invention (Claim 1), since the guide groove of the support member is opened upward before the pressing panel is inserted, the end portion of the core tube is opposed to the guide groove of the support member previously installed in the case. Can be inserted from above. The entire protector can be attached to the end portion of the core tube by inserting the pressing panel into the gap between the flat cylindrical support members from above. Therefore, the end portion of the core tube of the roll product can be supported by the receiving portion of the support member and the pressing panel so that vertical vibration does not occur.

  Further, since the gap between the support panels is filled with the pressing panel, the whole is reinforced. In other words, the support member and the pressing panel as a whole have the advantage of exhibiting substantially the same function as a conventional protector (see FIG. 9) having a circular hole at the center, and being easy to attach to the core tube.

  When the guide groove extends downward from the center of the upper end to the vicinity of the center (Claim 2), it is easy to insert the end portion of the core tube of the rolled product into the guide groove and guide it to the receiving portion. is there. On the other hand, when the notch groove extends downward from a position on either the left or right of the upper end and extends to the receiving portion while changing its direction from diagonally downward or laterally toward the receiving portion (Claim 3). ), The vertical vibration applied to the roll product is partially supported not only by the pressing panel but also by the upper edge of the guide groove. Therefore, the roll product can be protected more safely.

  Further, the support member has front and rear panels arranged through a gap, and an intermediate panel provided with a notch that opens upward so that a substantially lower half of the gap matches the receiving part or the guide groove. The left and right sides of the upper half of the gap are further filled with a substantially rectangular upward projecting portion of the intermediate panel, and the presser panel is the upper half of the gap, and the upper and lower sides between the upward projecting portions. In the case where the front and rear panels and the left and right upward projecting parts form a cylindrical shape that is flat in the front and rear (Claim 4), the weight of the roll product is substantially supported. Since the gap in the lower half of the support member is filled in advance and solid, the strength is high. Further, the left and right of the upper half are also solid because the upward projections of the intermediate panel and the pressing panel are substantially solid.

  In the case where a cylindrical sleeve that integrally fastens the front and rear panels and the intermediate panel is further provided, and a notch groove that matches the receiving portion and the guide groove is formed in the sleeve (Claim 5), It is not necessary to previously join the front and rear panels and the intermediate panel with an adhesive or the like, and manufacturing is easy. In addition, the disposal process is easy.

  On the other hand, the support member has front and rear panels arranged through a gap, and an intermediate panel provided with a notch that opens upward so that a substantially lower half of the gap matches the receiving part or the guide groove. The sleeve further includes a cylindrical sleeve that integrally fastens the front and rear panels and the intermediate panel. The sleeve is formed with a notch groove that matches the receiving portion and the guide groove. The panel is slidably accommodated between a substantially upper half of the gap between the front and rear panels and the left and right parts of the sleeve. (6), the front and rear panels and the intermediate panel can be integrally fastened by the sleeve, so that the front and rear panels and the intermediate panel are preliminarily bonded with an adhesive. In no need to be joined, it is easy to manufacture. In addition, the disposal process is easy.

  When the support member and the pressing panel are made of paper or synthetic resin cardboard and each member is made of the same material (Claim 7), it is lightweight and needs to be separated at the time of disposal. There is no. Further, in the case of a protector having a sleeve, it is preferable that the sleeve is also made of cardboard made of paper or synthetic resin and made of the same material (Claim 8). No need to separate.

  The packing material of the present invention (Claim 9) is a roll product core pipe or a steel pipe inserted into the core pipe, and the left and right ends of the pipe are hoisted with a wire and accommodated in a case in which a support member is mounted in advance. By mounting on the support member, the roll product can be stably stored and transported. Moreover, the operation | work which accommodates the picked-up roll product in a case, and takes out is easy.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a protector according to the present invention before assembly, FIG. 2 is a perspective view showing the protector after assembly, and FIG. 3 is a perspective view showing an embodiment of a sleeve according to the present invention. 4 is a perspective view showing an embodiment of a protector having the sleeve, FIG. 5 is a perspective view showing a procedure for packing a roll product using the protector of FIG. 4, and FIGS. 6 and 7 are views of the protector of the present invention. The perspective view which shows other embodiment, FIG. 8a and FIG. 8b are front views which show further another embodiment of the protector of this invention, respectively.

  A protector 10 shown in FIG. 1 includes an inner panel (front panel) 11, an outer panel (rear panel) 12, an intermediate panel 13 interposed therebetween, and a gap between the inner panel 11 and the outer panel 12. The presser panel 14 is inserted. The inner panel 11 and the outer panel 12 have the same shape, have a generally rectangular outline, and are formed with a substantially U-shaped cutout groove 15 that opens upward from the center of the upper end toward the center. The notch groove 15 includes a rectangular portion (guide groove) 16 and a semicircular portion (receiving portion) 17 continuous with the rectangular portion. The left and right inner edges of the rectangular portion 16 are usually parallel to each other, but may be tapered so as to expand somewhat upward.

  As the inner panel 11 and the outer panel 12, cardboard having a thickness of about 3 to 15 mm is used. For thicker ones, corrugated cardboard having two or more intermediate layers (corrugated layers) is used. Further, a plurality of, for example, two, cardboards having a thickness of 3 to 8 mm can be stacked. The stacked cardboards do not need to be bonded, but may be temporarily attached with a double-sided tape or an adhesive tape. However, it can also be glued. In the case of corrugated cardboard with strength against bending, such as corrugated cardboard with a corrugated layer sandwiched between two surface layers or plastic cardboard with many ribs interposed between two surface layers, The support strength in the vertical direction is increased so that the rib is in the vertical direction. The honeycomb corrugated cardboard does not have any strength in bending strength, so any direction is acceptable.

  The intermediate panel 13 has contours at the lower end and the left and right ends that substantially match the contours of the inner panel 11 and the outer panel 12, and has a wide width from the upper end to the substantial center, leaving a rectangular upward projection 18 on the left and right. A rectangular cutout 18a is formed, and a semicircular cutout (receiving portion) 19 having the same shape as the semicircular portion 17 of the inner panel 11 and the outer panel 12 is formed at the center of the bottom of the rectangular cutout 18a. Has been. Note that the rectangular cutout 18 a of the intermediate panel 13 can be regarded as an expansion of the width of the rectangular portion 16 in the U-shaped cutout groove 15 of the inner panel 11. The intermediate panel 13 can be formed by stacking a plurality of, for example, three of the above-mentioned cardboards.

  The pressing panel 14 has a left-right width and a height inserted into the rectangular cutout 18 of the intermediate panel 13, and a semicircular cutout 20 that opens downward is formed in the center of the lower end. . The thickness is the same as that of the intermediate panel 13. The pressing panel 14 can be formed of a rectangular panel material obtained when the rectangular notch 18 is punched when the intermediate panel 13 is manufactured.

  The pressing panel 14 can be formed by stacking the same number of, for example, three cardboards as the intermediate panel 13. The outlines of the rectangular cutout 18 of the intermediate panel 13 and the presser panel 14 fitted thereto are usually parallel to the left and right side edges, but may be somewhat expanded upward.

  As shown in FIG. 2, the inner panel 11, the outer panel 12, and the intermediate panel 13 configured as described above are overlapped with the intermediate panel 13 interposed therebetween, and temporarily attached with double-sided tape or the like. Thereby, there is a gap 21 corresponding to the thickness of the intermediate panel 13 in the upper half between the inner panel 11 and the outer panel 12, and a support member 23 having a U groove 22 penetrating in the front-rear direction is obtained. The support member 23 has a large number of corrugated cardboards on the lower half and on the left and right sides (in the above example, each layer is composed of two, three, two, three layers, seven cardboards as a whole). Because of its shape, the strength is high. The semicircular cutout 24 formed at the center of the upper end of the lower half also has a large number of panels closely stacked, so that even if the core tube 26 of the roll product 25 is placed on that part, it can sufficiently withstand the weight. be able to. Since the upper side of the U groove 22 is opened, the rolled product 25 can be easily mounted on the support member 23 installed in the case.

  The size of the gap 21 of the support member 23 obtained as described above is the same as the thickness of the pressing panel 14, and the left and right widths and depths of the gap 21 are the same as the width and height of the pressing panel 14. . Therefore, when the pressing panel 14 is inserted into the gap 21 after the roll product 25 is mounted, the front and rear surfaces of the pressing panel 14 are sandwiched between the corresponding surfaces of the inner panel 11 and the outer panel 12 and are held by friction. You may fix with an adhesive tape. Further, as described above, the left and right side edges of the pressing panel 14 are fitted into the inner edges of the rectangular cutout 18 of the intermediate panel 13. Therefore, the roll product 25 can be firmly held by the support member 23 and the pressing panel 14 so as not to vibrate.

  The support member 23 in FIG. 2 can be used as a support member having a flat cylindrical shape by itself. However, by winding the sleeve 27 shown in FIG. 3, the strength is further increased and the handling is facilitated. The sleeve 27 is provided at the free end (side edge) of the inner sheet 28 and outer sheet 29 having substantially the same shape as the inner panel 11, the flange sheet 30 interposed between the side edges of the inner panel 11, and the inner sheet 28 and outer sheet 29. Each of the flaps 31 and 32 is continuous. The sleeve 27 can also be manufactured by forming a U-shaped notch groove 33 in the same corrugated cardboard as described above and inserting a ruled line 34 for bending. This can be assembled into a flat cylindrical shape by overlapping the flaps 31, 32. It is preferable to join the flaps 31 and 32 together, for example, by joining the overlapping surfaces of the flaps 31 and 32 with a double-sided tape.

  For example, as shown in FIG. 4, the sleeve 27 is wound around the support member 23 of FIG. 2, and the flaps 31, 32 can be overlapped and stuck together, so that the whole can be integrated. The support member 35 having high strength is obtained. In this case, the outer panel 12, the intermediate panel 13, and the inner panel 11 do not need to be bonded with an adhesive and are easy to manufacture. Also, it is possible to save time when playing cardboard. By combining the support member 35 thus obtained with the pressing panel 14, the protector 36 having high strength is obtained.

  The sleeve 27 may be formed in a cylindrical shape in advance, and then the bundle of the outer panel 12, the intermediate panel 13, and the inner panel 11 may be pushed into the sleeve 27. Such a sleeve 27 not only integrates the stacked panels, but also serves as a part of the support structure and supports the roll product. The direction of corrugated corrugations and ribs constituting the sleeve 27 is also the vertical direction.

  FIG. 5 shows a procedure for packing the roll product 25 using the protector 10 of FIG. 1 or the protector 36 of FIG. First, a core material 37 such as a steel pipe is passed through the core tube 26 of the roll product 25, and a wire rope 38 is hooked on the core material 37 to lift the roll product 25. It can also be hung on the core tube 26 through a wire rope 38.

  On the other hand, the support member 35 of the protector 36 in FIG. 4 is mounted in advance along the inner surfaces of the left and right side walls 39a of the case 39 such as a cardboard box. The left and right side walls 39a of the case 39 are formed with notches 39b through which the core material 37 for lifting is passed from the upper end to the vicinity of the center, and the lid 40a continuous with the side wall 39a has a core material for lifting. A notch 40b for avoiding interference with the lens 37 is formed. When the cutouts 39b and 40b are formed, it is preferable that the cutouts 39b and 40b are not completely removed but can be opened and closed by lid pieces 39c and 40c that can be opened and closed by a crease line formed on the side edge.

  Then, with the lid pieces 39c and 40c opened, the roll product 25 lifted by the wire rope 38 as described above is placed in the case 39 as it is, and the core tube 26 is inserted into the U groove (reference numeral in FIG. 2). 22 and the notch groove 33) of FIG. 3 and the roll product 25 is supported by the support member 35. Next, a pressing panel (reference numeral 14 in FIG. 2) is attached to the support member 35 from above. Since the support member 35 is put in the case 39 in advance as described above, it is not necessary to insert a protector in the middle of the rolled product 25 that has been lifted, and it is necessary to temporarily place it on the Y-shaped support member 112 as shown in FIG. There is no. Since both ends of the roll product 25 are covered with the protector 36 in the case 39, the case 39 is prevented from being damaged by hitting the end portion of the roll product 25. Note that the packaging material including the pair of left and right protectors 36 and the case 39 is an embodiment of the packaging material of the present invention. As the protector, the protector 10 of FIG. 1 having no sleeve can be used.

  After the roll product 25 is accommodated in the case 39 and the pressing panel is mounted, the wire rope 38 is removed and the core material 37 is extracted. Then, the lids 40a and 40d of the case 39 are closed, the door pieces 39c and 40c are closed and the notches 39b and 40b are closed, and the lids 40a and 40d are fixed with tape to complete the packaging. After the storage, the protector supports the core tube 26 as in the case of the conventional protector, so that the roll product 25 does not contact the inner surface of the case 39. Therefore, the roll product 25 is not damaged. Furthermore, since the pressing panel of the protector presses the core tube 26 from above, the vibration of the roll product 25, particularly the vertical vibration, is suppressed during conveyance.

  When unpacking, reverse the above. That is, the holding panel 14 is pulled upward, the door pieces 39 c and 40 c are opened, the core material 37 is passed through the core tube 26, and the wire rope 38 is lifted.

  In the protector 36 of FIG. 4, rectangular cutouts (reference numeral 18 in FIG. 1) are formed so as to leave side edges of a predetermined width on the left and right upper portions of the intermediate panel (reference numeral 13 in FIG. 1). As in the case of the protector 42 shown in FIG. 6, the intermediate panel 44 of the support member 43 can be formed with only the lower half without leaving the left and right upper side edges. The left and right widths of the pressing panel 45 are set to be the same as the left and right inner widths of the sleeve 27, that is, the left and right widths of the intermediate panel 44. Other parts are substantially the same as the protector 36 of FIG. 4, and the packaging method is also the same (see FIG. 5). The protector 42 in FIG. 6 is formed in a flat cylindrical shape including the sleeve 27 as a whole. This also has the same effect as described above, and the intermediate panel 44 and the pressing panel 45 can be easily manufactured.

  The support member 48 of the protector 47 shown in FIG. 7 includes a pair of left and right intermediate panels 49 each having a predetermined width extending vertically. The pressing panel 50 has the same height as the inner panel (reference numeral 11 in FIG. 1) and the outer panel (reference numeral 13 in FIG. 1), and extends downward from the center of the left and right, and has a U-shaped notch that opens at the lower end. A groove 51 is formed. In this protector 47, a roll is formed in a circular hole formed by the semicircular portion (receiving portion) 17 of the U-shaped cutout groove 15 of the support member 48 and the semicircular portion 52 of the cutout groove 51 of the holding panel 50. The core tube of the product can be installed. The packing method is the same as that of the protector shown in FIG. 1 (see FIG. 5).

  The protector 54 shown in FIG. 8A extends downward from a position where the U-shaped cutout groove 15 formed in the support member 55 is not located at the center of the support member 55 but to the left of the upper end, and is further bent or bent. It is curved and extends obliquely downward toward the central portion (receiving portion) 56. In addition, you may make it extend sideways like FIG. 8b. The gap formed between the front and rear panels of the support member 55 is provided only on the left side, and the pressing panel 57 is also only on the left side. Therefore, the notch 58 at the lower end of the presser panel 57 has a fan shape of approximately ¼ circle. The other structure is substantially the same as the protector 10 of FIG. 1, and the packaging method is also the same (see FIG. 5). When the core tube of the roll product is sandwiched from above and below by the support member 55 and the pressing panel 57, the protector 54 can be pressed not only by the pressing panel 57 but also by the upper edge 59 of an obliquely extending portion of the cutout groove 15. . Therefore, the protector 54 can further prevent vertical vibration.

  In the protector 60 of FIG. 8b, the lower part of the notch groove 15 extends sideways. And the clearance gap formed between the panels before and behind the supporting member 55 is provided left-right symmetrically similarly to the case of FIG. 1, and the pressing panel 56 is also left-right symmetrical. The notch 58 of the pressing panel 56 is provided in a semicircular shape at the center as in the case of FIG. In this protector 60, since the lower part of the notch groove 15 extends sideways, vertical vibrations can be further prevented when a roll product is stored.

  The protector of the present invention can use not only paper cardboard but also plastic cardboard. In addition to the corrugated intermediate layer, honeycomb cardboard (made of paper and synthetic resin) can also be used. When honeycomb cardboard is used, the strength against bending is increased. In any case, it is preferable that the sheets are made of the same material. As a result, there is no need for separate disposal, and it is easy to reuse and recycle materials.

It is a perspective view before the assembly which shows one Embodiment of the protector of this invention. It is a perspective view which shows the assembly after the protector of FIG. It is a perspective view which shows one Embodiment of the sleeve concerning this invention. It is a perspective view which shows one Embodiment of a protector provided with the sleeve of FIG. It is a perspective view which shows the procedure which packs roll products using the protector of FIG. It is a perspective view which shows other embodiment of the protector of this invention. It is a perspective view which shows other embodiment of the protector of this invention. 8a and 8b are front views showing still other embodiments of the protector according to the present invention. It is a perspective view which shows an example of the conventional protector. It is process drawing which shows the packing procedure of the roll product using the protector.

DESCRIPTION OF SYMBOLS 10 Protector 11 Inner panel 12 Outer panel 13 Intermediate panel 14 Press panel 15 Notch groove 16 Rectangular part 17 Semicircle part 18 Upward projecting part 18a Rectangular notch 19 Semicircular notch 20 Semicircular notch 21 Gap 22 U-groove 23 Support member 24 Semicircular cutout 25 Roll product 26 Core tube 27 Sleeve 28 Inner sheet 29 Outer sheet 30 Saddle sheet 31, 32 Flap 33 U-shaped cutout groove 34 Ruled line 35 Support member 36 Protector 37 Core material 38 Wire rope 39 Case 39a Side wall 39b Notch 39c Lid piece 40a Lid 40b Notch 40c Lid piece 40d Lid 42 Protector 43 Support member 44 Intermediate panel 45 Press panel 47 Protector 48 Support member 49 Intermediate panel 50 Press panel 51 U-shape Shaped cutout groove 52 Semicircular part 54 Protector 55 supporting member 56 the central portion 57 pressing the panel 58 cutout 59 cutout on the groove edge 60 protector

Claims (9)

A protector attached to the end of a core tube of a roll product,
The shape seen from the front is rectangular, has a flat cylindrical shape that opens at the upper end, an arc-shaped receiving portion that fits into the core tube is formed at the substantially central portion of the front, and the receiving portion from the upper end A support member having a guide groove through which the core tube passes,
A protector comprising a pressing panel that is slidably inserted from the opening at the upper end of the support member and closes the guide groove while leaving a substantially circular opening in the receiving portion.   The protector according to claim 1, wherein the guide groove extends linearly downward from the center of the upper end to the receiving portion.   2. The protector according to claim 1, wherein the guide groove extends downward from a position on either of the left and right sides of the upper end, and extends to the receiving portion while changing its direction obliquely downward or laterally toward the receiving portion from the middle. The support member has front and rear panels arranged via a gap,
A substantially lower half of the gap is filled with an intermediate panel having a notch that opens upward to match the receiving part or guide groove,
The left and right of the substantially upper half of the gap are further filled with a substantially rectangular upward projection of the intermediate panel,
The pressing panel is accommodated in a substantially upper half of the gap and is slidable up and down between the upward projecting portions,
The protector according to claim 1, 2, or 3, wherein the front and rear panels and the left and right upward projecting portions form a flat cylindrical shape in the front and rear.   The protector according to claim 4, further comprising a cylindrical sleeve that integrally fastens the front and rear panels and the intermediate panel, and the sleeve is formed with a notch groove that matches the receiving portion and the guide groove. The support member has front and rear panels arranged via a gap,
A substantially lower half of the gap is filled with an intermediate panel having a notch that opens upward to match the receiving part or guide groove,
It further comprises a cylindrical sleeve that integrally fastens the front and rear panels and the intermediate panel;
The sleeve is formed with a notch groove that matches the receiving portion and the guide groove,
The presser panel is accommodated so as to be slidable up and down between the substantially upper half of the gap between the front and rear panels and the left and right parts of the sleeve,
The protector according to claim 1, 2 or 3, wherein the front and rear panels and the left and right portions of the sleeve form a flat cylindrical shape in the front and rear.   The protector according to any one of claims 1 to 6, wherein the support member and the pressing panel are made of cardboard made of paper or synthetic resin, and each member is made of the same material.   The protector according to claim 5 or 6, wherein the support member, the pressing panel and the sleeve are made of paper or synthetic resin cardboard, and each member is made of the same material.   A roll product packaging material comprising a rectangular parallelepiped case and a pair of protectors according to any one of claims 1 to 8 arranged on the opposing inner surfaces of the case.

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