JP2011073778A - Locking mechanism for sheet material and packaging material having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking mechanism for a sheet material, the mechanism being configured to securely lock sheet materials together and is stably assembled, and to provide a packaging material having the same. <P>SOLUTION: The width W2 of the leading end 3b of an insertion flap 3 is shorter than the opening length L2 of the guide 4b of an insertion hole 4, and the opening width H2 of a part forming the guide 4b is thicker than the insertion flap 3. This makes it possible to easily insert the leading end 3b of the insertion flap 3 into the guide 4b of the insertion hole 4. In this state, the insertion flap 3 is pushed into the insertion hole 4, thereby causing the insertion flap 3 to enter the insertion hole 4 while moving to a fixing portion 4a greater in opening length than the guide 4b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lock mechanism for detachably connecting a sheet material such as a corrugated cardboard sheet, and a packaging material such as a corrugated cardboard spacer and a packaging box.

  Conventionally, packaging materials such as packaging boxes made of cardboard sheets and spacers for packaging, which are inexpensive, have high strength, can be recycled, and are excellent in workability, have been widely used. Such a packaging material made of a corrugated cardboard sheet is formed by folding a corrugated cardboard sheet into a predetermined shape, but it is necessary to fix the end portion in order to maintain the shape of the folded packaging material.

  However, when a fixing member such as an adhesive tape is used, the fixing operation becomes complicated and there is a problem that the cost is increased by the amount of the fixing member. Therefore, a method of easily locking the end portion of the cardboard has been proposed. For example, in Patent Document 1, an insertion piece is provided at one end of an openable / closable lid portion, and a locking piece provided on the main body side is inserted. A packaging box is disclosed in which a lid portion is locked by being inserted into an insertion hole (slit) formed in a piece.

JP 2002-37343 A

  By the way, normally, the opening width and the opening length of the insertion hole are formed slightly smaller than the thickness and length of the insertion piece so that the engagement between the insertion piece and the insertion hole is not easily disengaged. However, a paper packaging material such as a corrugated cardboard sheet has a problem in that it tends to be broken or deformed when the insertion piece is inserted into the insertion hole, resulting in a decrease in yield. In particular, when multiple insertion pieces are provided at the same edge of the sheet material, it is difficult to insert simultaneously into multiple insertion holes provided in other sheet materials to be connected. As a result, the workability became worse.

  In view of the above problems, an object of the present invention is to provide a sheet material locking mechanism that reliably locks sheet materials and has stable assembly workability, and a packaging material including the same.

  In order to achieve the above object, the present invention is a sheet material locking mechanism that connects a first sheet material in which an insertion piece is formed and a second sheet material in which an insertion hole into which the insertion piece is inserted is formed. The insertion piece has a shape that becomes narrower from the proximal end portion toward the distal end portion, and the insertion hole has an opening width that is substantially the same as the thickness of the insertion piece, and a maximum width of the insertion piece. A fixed portion having a short opening length, and a guide portion formed continuously along the longitudinal direction of the fixed portion and having an opening length shorter than the opening length of the fixing portion and longer than the minimum width of the insertion piece. It is characterized by comprising.

  Further, according to the present invention, in the locking mechanism for the sheet material having the above-described configuration, an engagement concave portion that engages with an opening edge of the fixing portion is provided between the first sheet material and the base end portion of the insertion piece. It is characterized by.

  According to the present invention, in the locking mechanism for the sheet material having the above-described configuration, a notch is provided in an end edge in the longitudinal direction of the fixed portion.

  According to the present invention, in the sheet material locking mechanism configured as described above, the insertion piece and the insertion hole have a symmetrical shape when viewed from the insertion direction.

  According to the present invention, in the sheet material locking mechanism having the above-described configuration, a plurality of the insertion pieces are formed at the same edge of the first sheet material, and the same number of insertion holes as the insertion pieces are provided in the second sheet. It is characterized by being formed at a corresponding position of the material.

  Moreover, this invention is a packaging material provided with the locking mechanism of the sheet | seat material of the said structure.

  According to the first configuration of the present invention, when the insertion piece of the first sheet material is inserted into the insertion hole of the second sheet material, the tip of the insertion piece can be easily temporarily fixed to the guide portion of the insertion hole. Since the insertion piece can be smoothly inserted into the insertion hole and the insertion piece is prevented from being bent or torn, it becomes a sheet material locking mechanism that can easily and reliably perform the fixing operation between the sheet materials. .

  According to the second configuration of the present invention, in the locking mechanism for the sheet material of the first configuration, the opening edge of the fixing portion is engaged between the first sheet material and the base end portion of the insertion piece. By providing the engaging concave portion to be removed, it is possible to reliably prevent the insertion piece from coming out of the insertion hole. In addition, since the feel when the engaging recess engages with the opening edge of the fixed portion is transmitted to the hand of the assembly operator, the operator can easily recognize that the insertion piece has been completely inserted into the insertion hole.

  Further, according to the third configuration of the present invention, in the locking mechanism of the sheet material of the first or second configuration, the fixing portion is fixed when the insertion piece is inserted by providing a cut in the longitudinal edge of the fixing portion. Since the portion is pushed and expanded along the cut, the insertion of the insertion piece into the insertion hole becomes smoother, and the breakage of the insertion hole and the deformation of the insertion piece can be effectively prevented.

  According to the fourth configuration of the present invention, in the sheet material locking mechanism according to any one of the first to third configurations, the insertion piece and the insertion hole are formed symmetrically when viewed from the insertion direction. Thus, the pressure at the time of insertion of the insertion piece is evenly applied in the longitudinal direction of the insertion hole, so that the insertion piece can be smoothly inserted.

  According to the fifth configuration of the present invention, in the sheet material locking mechanism according to any one of the first to fourth configurations, a plurality of insertion pieces are formed on the same edge of the first sheet material, and the insertion is performed. By forming the same number of insertion holes as the pieces at corresponding positions of the second sheet material, the bonding between the first sheet material and the second sheet material becomes stronger. Moreover, the front-end | tip part of several insertion piece can be inserted simultaneously in the state fixed by inserting in the guide part of an insertion hole, and the fixing operation | work of a sheet | seat material can be performed efficiently.

  Further, according to the sixth configuration of the present invention, by including the sheet material locking mechanism of any one of the first to fifth configurations, the assembly workability is excellent, and the shape can be easily retained. It becomes the packaging material of composition.

Development view of corrugated board spacer of the present invention Enlarged view of the insertion hole in FIG. The perspective view which shows the state which bent the side surface from the state of FIG. 1, and inserted the front-end | tip part of the insertion piece in the guide part of the insertion hole. Partial enlarged view around the insertion piece and insertion hole in FIG. The perspective view which shows the state which assembled the cardboard spacer Side sectional view showing the assembled state of cardboard spacer Top view showing other shapes of insertion piece and insertion hole

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a development view of a cardboard spacer according to the present invention. In FIG. 1, the cut is indicated by a solid line, and the fold line (mountain fold line) is indicated by a two-dot chain line. The corrugated cardboard spacer 1 is disposed in the gap between the packaging container and the product (packaged object), thereby restricting the movement of the product in the container and protecting it from damage or damage due to impact or vibration. The cardboard spacer 1 of the present invention is formed by assembling a single sheet material punched into a predetermined shape as shown in FIG. 1, and is roughly continuous in series via parallel folding lines L1 to L5. It is comprised from six side surfaces 2a-2f.

  Three insertion pieces 3 are formed at the edge of the side surface 2a, and a pair of flaps 5 are formed near the corners of the side surface 2a. Further, three insertion holes 4 into which the insertion pieces 3 are inserted are formed on the side surface 2f. The insertion piece 3 and the insertion hole 4 constitute a locking mechanism for the side surface 2a (first sheet material) and the side surface 2f (second sheet material). A support surface 2g is connected to the edge of the side surface 2f via a fold line L6, and L-shaped cut lines 6 are formed at both ends of the fold line L6.

  FIG. 2 is an enlarged view of the insertion hole 4. The insertion hole 4 is a projection in plan view that includes an elongated rectangular fixed portion 4a into which the insertion piece 3 is inserted and fixed, and a guide portion 4b (hatched portion) continuous along the substantially central portion in the longitudinal direction of the fixed portion 4a. It has a shape, and cuts 4c are provided at both ends of the fixed portion 4a.

  Next, the assembly procedure of the cardboard spacer 1 of the present invention will be described. First, the side surfaces 2a to 2f and the support piece 2g are bent along the folding lines L1 to L6 from the state of FIG. Next, as shown in FIG. 3, the three insertion pieces 3 formed on the side surface 2a are inserted into the three insertion holes 4 formed on the side surface 2f. When the support surface 2g is bent, a cutout is formed in the side face 2f along the cut line 6, and the flap 5 is inserted into the cutout.

  FIG. 4 is an enlarged view showing the relationship between the insertion piece 3 and the insertion hole 4 in FIG. 3. As shown in FIG. 4, the width W <b> 2 of the distal end portion 3 b of the insertion piece 3 is shorter than the opening length L <b> 2 of the guide portion 4 b of the insertion hole 4. Further, since the thickness of the insertion piece 3 is substantially the same as the opening width H1 of the fixed portion 4a, the opening width H2 of the insertion hole 4 where the guide portion 4b is formed is wider than the thickness of the insertion piece 3. . Thereby, the front-end | tip part 3b of the insertion piece 3 can be easily inserted in the guide part 4b of the insertion hole 4. FIG. Near the edge of the side surface 2a where the insertion piece 3 is formed, a finger hooking hole 8 is formed for pulling out the insertion piece 3 from the insertion hole 4 when the cardboard spacer 1 is disassembled.

  Then, the side surface 2a is pushed in the direction of the arrow in FIG. 3 from the state of FIG. 3 in which the tip portions 3b of the three insertion pieces 3 are inserted into the guide portions 4b of the corresponding insertion holes 4. At this time, since the width of the insertion piece 3 gradually increases from the distal end portion 3b toward the base end portion 3a, both ends of the insertion piece 3 interfere with the opening edge of the guide portion 4b. Accordingly, the insertion piece 3 enters the insertion hole 4 while moving to the fixing portion 4a having an opening length larger than that of the guide portion 4b.

  As shown in FIG. 4, the maximum width W <b> 1 of the base end portion 3 a of the insertion piece 3 is longer than the opening length L <b> 1 of the fixing portion 4 a of the insertion hole 4. Therefore, when the insertion piece 3 is inserted to the vicinity of the base end portion 3a, the insertion piece 3 is further inserted into the insertion hole 4 while pushing the notches 4c at both ends of the fixing portion 4a.

  Then, as shown in FIG. 5, the insertion piece 3 is completely inserted up to the base end portion 3a, and the engaging recess 7 provided adjacent to the base end portion 3a is engaged with the opening edge of the insertion hole 4 to corrugate the cardboard. The assembly of the spacer 1 is completed. At this time, the side surfaces 2 a and 2 f intersecting substantially vertically form the product holding portion 9. The corrugated cardboard spacer 1 bent in this way is arranged along the inner surface of the outer box 100 as shown in FIG. 6, and the corner of the article to be packed is placed on the product holding part 9.

  According to the above configuration, the three insertion pieces 3 on the side surface 2a are inserted into the three insertion holes 4 on the side surface 2f in a state where the distal end portion 3b of the insertion piece 3 is inserted into the guide portion 4b of the insertion hole 4 and temporarily fixed. By inserting them at the same time, the assembly work can be performed efficiently. In addition, since stable assembly work is possible and deformation of the insertion piece 3 and breakage of the insertion hole 4 can be prevented, the yield of the cardboard spacer 1 is also improved.

  Furthermore, the engagement recess 7 of the insertion piece 3 engages with the opening edge of the fixing portion 4a, so that the insertion piece 3 can be reliably prevented from coming out of the insertion hole 4, and the side surfaces 2a to 2f and the support surface Since 2g is held in a bent state, the corrugated cardboard spacer 1 can maintain a substantially L-shape when viewed from the side. Further, the feel when the engaging recess 7 is engaged with the opening edge of the fixed portion 4 a is transmitted to the assembly operator's hand, so that the operator can easily insert the insertion piece 3 into the insertion hole 4. Can be recognized.

  The shape and arrangement of the insertion piece 3 and the insertion hole 4 are not particularly limited as long as the tip 3b of the insertion piece 3 can be temporarily fixed to the guide portion of the insertion hole 4, as shown in FIG. The insertion piece 3 having a shape or the insertion hole 4 having a shape as shown in FIG. 7B can also be used. Also in this case, the widths W1 and W2 of the base end portion 3a and the distal end portion 3b of the insertion piece 3 and the opening lengths L1 and L2 of the fixing portion 4a and the guide portion 4b of the insertion hole 4 are W1> L1, W2 < It is necessary to satisfy the relationship of L2.

  However, in the shape of the insertion piece 3 and the insertion hole 4 shown in FIG. 7, the pressure when inserting the insertion piece 3 is not evenly applied in the longitudinal direction of the insertion hole 4, and the insertion piece 3 may not be inserted smoothly. . Therefore, as shown in FIG. 4, it is preferable that the insertion piece 3 and the insertion hole 4 have a symmetrical shape when viewed from the insertion direction.

  In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, a corrugated cardboard spacer formed from a corrugated cardboard sheet is illustrated, but other material may be used as long as it is a sheet material such as a corrugated cardboard sheet.

  In the above embodiment, an example in which the sheet material locking mechanism of the present invention is applied to the assembly of a corrugated cardboard spacer is shown, but the present invention can be applied to other packaging materials such as a packaging case assembled from a corrugated cardboard sheet or a plastic corrugated sheet material. Is equally applicable.

  The present invention can be used for a locking mechanism for a sheet material such as a corrugated cardboard sheet or a plastic sheet. By using the present invention, the insertion piece can be smoothly inserted into the insertion hole, and the insertion piece can be prevented from being bent or torn. Therefore, the sheet material can be fixed easily and reliably. It becomes a locking mechanism of the material.

  Further, by using the sheet material locking mechanism of the present invention, it is possible to reliably hold the shape and to provide a packaging material excellent in assembly workability with a simple configuration.

1. Corrugated cardboard spacer (packaging material)
2a-2f Side surface 2g Support surface 3 Insertion piece 3a Base end part 3b Tip part 4 Insertion hole 4a Fixing part 4b Guide part 4c Cutting 7 Engaging recess 8 Finger hook 9 Product holding part 100 Outer box

Claims (6)

A locking mechanism for a sheet material that connects a first sheet material in which an insertion piece is formed and a second sheet material in which an insertion hole into which the insertion piece is inserted is formed,
The insertion piece has a shape that becomes narrower from the proximal end portion toward the distal end portion, and the insertion hole has an opening width that is substantially the same as the thickness of the insertion piece and an opening that is shorter than the maximum width of the insertion piece. A fixed portion having a length, and a guide portion formed continuously along the longitudinal direction of the fixed portion and having an opening length shorter than the opening length of the fixing portion and longer than the minimum width of the insertion piece. The sheet material locking mechanism is characterized in that:   2. The sheet material locking mechanism according to claim 1, wherein an engagement concave portion that engages with an opening edge of the fixed portion is provided between the first sheet material and a base end portion of the insertion piece. .   The sheet material locking mechanism according to claim 1, wherein a notch is provided in an end edge in a longitudinal direction of the fixing portion.   4. The sheet material locking mechanism according to claim 1, wherein the insertion piece and the insertion hole have a symmetrical shape when viewed from the insertion direction. 5.   A plurality of the insertion pieces are formed at the same edge of the first sheet material, and the same number of the insertion holes as the insertion pieces are formed at corresponding positions of the second sheet material. The sheet material locking mechanism according to any one of claims 1 to 4.   The packaging material provided with the locking mechanism of the sheet | seat material in any one of Claims 1 thru | or 5.

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