JPH0543585B2

JPH0543585B2 -

Info

Publication number: JPH0543585B2
Application number: JP1309151A
Authority: JP
Inventors: Toshiharu Mizuno; Hiromi Tsuji
Original assignee: Mitsui Toatsu Chemicals Inc
Current assignee: Mitsui Toatsu Chemicals Inc
Priority date: 1986-12-16
Filing date: 1989-11-30
Publication date: 1993-07-02
Also published as: JPH02191141A

Description

[Detailed description of the invention]

〔産業上の利用分野〕本発明は、段ボール、フアイバー箱等の紙箱を
複数個連結して成る重量物を収容した紙箱連結体
に関する。〔従来の技術〕複数の紙箱を連結して一つの輸送単位にする方
法としては、一般的に複数の箱をバンド掛けによ
つて結束したり、粘着テープで接着したり、さら
には、箱同士を接着剤等で接着する方法が採られ
ている。しかしながら、重量物を収容した箱の場合、バ
ンド掛けによつては箱を傷めることなく固く確実
に結束することができず、また、粘着テープでは
接着強度が弱いため荷重に耐えられない等の欠点
がある。さらに、箱同士を接着剤に接着する方法
では、容易に分離できるように接着する必要があ
るが、そうすると取扱中に発生する衝撃により箱
が分離してしまう恐れがある。また、天地両面に厚紙を接着して箱を結合する
方法もあるが、この方法は、必ずしも強固な結合
ができず、傾斜した状態で床面に落下させると、
上記厚紙が剥がれ、荷崩れが生じてしまうという
問題があり、さらに、結合した紙箱連結体を一個
一個の箱に分離する際には天側の厚紙を箱の接合
線に染つて切断した後、箱を引つ繰り返して底面
の厚紙を切断しなければならず、解梱にも手間と
時間がかかるという問題点があつた。〔発明が解決しようとする課題〕本発明は、叙上の観点に立つてなされたもので
あつて、その目的とするところは、段ボール箱等
を複数個連結する際に、内容物が重量物である場
合でも充分な強度を有し、しかも外観を損ねず使
用時に個々の箱を容易に切り離すことができる紙
箱連結体を提供することにある。〔課題を解決するための手段〕本発明の目的は、引き剥がしに対して強い抵抗
力を有する連結用厚紙による連結と、剪断破壊に
対して強い抵抗力を示す接着剤による接合に、そ
れぞれ改良を加えると共に、それらを組み合わせ
て紙箱同士を連結することにより達成される。更に具体的に述べると、連結用厚紙による連結
に関する改良点は、天側連結用厚紙の紙箱同士の
対向接触面に対応する部分にカツトテープを設け
ること及び地側の連結用厚紙の紙箱同士の対向接
触面に対応する部分にミシン目を設けることであ
り、接着剤による接合に関する改良点は、接着剤の
塗布を紙箱同士の対向接触面の天側に近い部分と
地側に近い部分にそれぞれ点線状又は線状に行
い、天側に近い方の塗布面積が狭く、地側に近い
方の塗布面積が広くなるように塗布し、接着する
ことである。このようにすると、取扱中の衝撃に対し充分な
強度を有し、かつ、容易に紙箱同士を分離するこ
とができる紙箱連結体が得られる。〔作用〕叙上の如き構成であると、引き剥がしに対して
強い強度特性を有する連結用厚紙による接着と、
剪断破壊に対して強い強度特性を有する紙箱の対
向接触面同士の接着がなされており、かつ、それ
らの接着方法には前述の改良がなされているので
複数個の箱を確実に、しかも頑丈に連結すること
ができ、また、連結した紙箱を引つ繰り返さずと
もカツトテープを引いて天側連結用厚紙を切断で
き、さらに、紙箱同士の対向接触面の天側に塗布
されている接着剤の量が少ないので、連結されて
いる紙箱を天側から容易に引き離すことができる
ものである。〔実施例〕以下、図面により本発明の詳細を具体的に説明
する。第１図は、本発明に係る紙箱連結体に利用する
紙箱の組立状態を段階的に示した説明図、第２図
は、第１図に示した紙箱を複数個接着した状態を
示す斜視図、第３図は、第２図に示した紙箱連結
体に天側及び地側連結用厚紙を接着した状態を示
す透視図、第４図は天側連結用厚紙を示す平面
図、第５図は地側連結用厚紙を示す平面図、第６
ないし第８図は、本発明に係る紙箱連結体のテス
トを行つた際の状態を示す説明図である。而して、第１図ないし第３図に於いては、図面
の煩雑化を防ぐため省略してあるが、各箱の底面
も上面と同様に構成されているものである。而して、第１図ないし第３図中、１は段ボール
等で製作された紙箱、２はその内フラツプ、３は
紙箱１のつま面４に取り付けられた外フラツプ、
５は段ボール等で形成された天側連結用厚紙、６
は段ボール等で形成された地側連結用厚紙、７は
上記紙箱１同士の対向接触面の天側及び地側の稜
線に近い部分に点線状に塗布した接着剤である。而して、第１図に示した紙箱１は、段ボール箱
の形式に関する日本工業規格（JIS）Z1507に規
定されたＡ−１形（全フラツプ同一長サ、外フラ
ツプ突キ合セ切込式）と類似の形状を有する段ボ
ール箱であり、第１図Ａに示す如く、長さＬ、幅
Ｗ、深さＤ、内フラツプ長さFa、外フラツプ長
さFbを有し、上記Ａ−１形の規定に従いFa＝Fb
となつているものである。また、外フラツプ３の長さFaと紙箱１の長さ
Ｌとの関係は2Fa＜Ｌ、即ちFa＜1/2Ｌとなつて
いる。而して、通常の段ボールに於いては、つま面４
側のフラツプ３を先に折り込み（従つて、３が内
フラツプとなる。）、その上に側面側のフラツプ２
を折り重ねるものであるが、本発明に係る紙箱連
結体を製造する場合には、通常の場合とは逆に、
先ず、第１図Ｂに示す如く側面側のフラツプ２を
内フラツプとして折り込み、そのあとで第１図Ｃ
に示す如くつま面４側のフラツプ３を外フラツプ
として折り重ね、上記内フラツプと外フラツプを
ホツトメルト糊等の接着剤で接着して紙箱１を形
成するものである。次いで、上記の如く成形された紙箱１を第２図
に示す如く、たとえば、三個、各内フラツプ２が
隣接して平行に整列するように配置せしめると共
に、内容物の重量に応じて、紙箱１同士の対向接
触面の天側及び地側の稜線と適宜の距離を隔てて
平行に、点線状又は線状に、かつ、その接着面積
が天側では、地側より狭くなるように接着剤７を
塗布し、各紙箱１同士を接合する。然る後、第３図に示す如く、それらの紙箱１の
天側及び地側の外フラツプの間の間〓部にそれぞ
れ天側連結用厚紙５及び地側連結用厚紙６を接着
して固定するものである。これら天側連結用厚紙５及び地側連結用厚紙６
の幅は、紙箱１の外フラツプの間の間〓と同等又
はそれ以下であり、天側連結用厚紙５には、第４
図に示す如く、連結された紙箱１の対向接触面に
対応する部分にカツトテープ５０が設けられてい
る。また、地側連結用厚紙６には、第５図に示す如
く、連結された紙箱１の対向接触面に対応する部
分にミシン目６０が設けられている。而して、上記各箱体１同士を接合する接着剤７
による接合力は、接合面に垂直な引き剥がしに対
しては弱いが、接合面に平行な剪断破壊には強い
抵抗を示すものである。一方、上記天側連結用厚
紙５及び地側連結用厚紙６による接合力は、剪断
破壊には弱く、引き剥がしには強い抵抗を示す。
このため、この紙箱連結体は乱暴な取扱いを受
け、接合部が剪断と引き剥がしの複合外力を受け
ても破壊されることなく、強固な連結を保持し続
けるものである。また、紙箱１同士を分離したいときには、カツ
トテープ５０を引いて天側連結用厚紙５を切断
し、天側から紙箱１同士を引き剥がし、地側連結
用厚紙６をミシン目６０で切断すれば良い。この引き剥がしの作業に際しては、紙箱１同士
の対向接触面の天側の接着剤７の塗布面積が狭
く、接合力が弱いので、紙箱１同士を天側から引
き剥がせば容易に切離し得るものである。また、本発明に於いては、三箱連結した場合、
その連結体１と等しい大きさの一個の紙箱に比べ
てその紙箱の圧縮強度は、段ボールの構成原紙の
品質を落としても大幅に向上するものである。なお、本発明は叙上の実施例に限定されるもの
ではない。即ち、たとえば、連結すべき紙箱とし
ては、上記のJIS規格Z1507のＡ−１形のものに
限定されず、同Ａ−２形、Ａ−５形、Ｂ−３形、
Ｂ−４形、Ｂ−６形、Ｃ−３形等の紙箱を用いる
ことも可能であり、本発明はその目的の範囲内で
自由に設計変更できるものであり、本発明は本明
細書及び図面の記載から当業者が容易に想到し得
るすべての変更実施例を包摂するものである。次に、本発明に係る紙箱連結体の具体的な強度
試験結果について説明する。試験に用いた紙箱の寸法はａ＝280mm、ｂ＝140
mm、ｈ＝390mmである。接着剤の塗布は、第６図に示すように『線付
け』で行つた。なお、紙箱の高さｈが350mm以上の場合は、図
のように天地両側合わせて６か所線積けするが、
350mm未満の場合は、地側のみ３か所線付けする
だけでも良い。糊付け位置は、天側及び地側の稜線からｄ＝ｅ
＝40mmとし、糊付面は幅３mm×長さ約６cmで、天
側は１条、地側は２条とした。接着後の接着剤の
塗布面の形状は、天側の１条付けは幅５〜10mmと
なり、地側の２条付けは合さわつて幅10〜15mmと
なつた。なお、接着剤の塗布にはアプリケーシヨンノズ
ルを使用した。接着剤には下記のような市販のエチレン酢酸ビ
ニル共重合樹脂製のものを使用した。メーカー商品名三井東圧化学(株) エムテイメルトG131 積水化学(株) エスダイン8512JS−１溶融粘度（180℃） 1100cp 1480cp （但し、溶融粘度はJIS−Ｋ−6892に準ずる。）なお、接着剤はその接着強度が紙（段ボールの
表紙）の表面強さより大きいものならば何でも良
い。段ボールの紙質は下記の通り従来よりも薄いも
のを使用した。 [Industrial Field of Application] The present invention relates to a connected paper box body for storing heavy objects, which is formed by connecting a plurality of paper boxes such as cardboard boxes and fiber boxes. [Prior Art] Generally speaking, the methods of connecting multiple paper boxes into a single transportation unit include binding multiple boxes with bands, gluing them together with adhesive tape, and even attaching the boxes to each other. A method of bonding them with adhesive or the like is adopted. However, in the case of boxes containing heavy items, banding cannot bind the boxes firmly and reliably without damaging them, and adhesive tape has weak adhesive strength and cannot withstand the load. There is. Furthermore, in the method of bonding the boxes together with an adhesive, it is necessary to bond the boxes so that they can be easily separated, but if this is done, there is a risk that the boxes may separate due to impact generated during handling. Another method is to bond the boxes together by gluing cardboard on both the top and bottom sides, but this method does not necessarily create a strong bond, and if the box is dropped onto the floor at an angle,
There is a problem that the above-mentioned cardboard peels off, causing the cargo to collapse.Furthermore, when separating the combined paper box assembly into individual boxes, the top cardboard is dyed along the joining line of the boxes and cut. The problem was that the box had to be pulled repeatedly to cut the cardboard on the bottom, and unpacking took time and effort. [Problems to be Solved by the Invention] The present invention has been made based on the above-mentioned viewpoint, and its purpose is to prevent the contents from being heavy objects when connecting a plurality of cardboard boxes, etc. It is an object of the present invention to provide a paper box connected body which has sufficient strength even in cases where the boxes are different from each other, and which allows individual boxes to be easily separated during use without spoiling the appearance. [Means for Solving the Problems] The object of the present invention is to improve the connection using cardboard that has strong resistance to peeling and the bonding using adhesive that has strong resistance to shear failure. This is achieved by adding and combining them to connect the paper boxes. To be more specific, the improvements regarding the connection using cardboard for connection are that cut tape is provided at the part corresponding to the facing contact surfaces of the cardboard boxes for connection on the top side, and that the paper boxes for cardboard for connection on the bottom side are facing each other. The improvement in bonding with adhesive is to create perforations in the areas corresponding to the contact surfaces. It is applied in a shape or in a line, and the applied area is narrower on the side closer to the top side and wider on the side closer to the bottom side, and then bonded. In this way, a paper box assembly can be obtained that has sufficient strength against impact during handling and that allows the paper boxes to be easily separated from each other. [Function] With the structure as described above, adhesion using connecting cardboard that has strong strength characteristics against peeling,
The opposing contact surfaces of the paper boxes are bonded to each other, which has strong strength characteristics against shear failure, and the above-mentioned improvements have been made to the bonding method, making it possible to securely and sturdily bond multiple boxes. In addition, the top connecting cardboard can be cut by pulling the cutting tape without repeatedly pulling the connected paper boxes, and the amount of adhesive applied to the top side of the opposing contact surfaces of the paper boxes can be cut. Since the paper boxes are small, the connected paper boxes can be easily separated from the top side. [Example] The details of the present invention will be specifically explained below with reference to the drawings. FIG. 1 is an explanatory diagram showing step-by-step the assembled state of a paper box used in the paper box assembly according to the present invention, and FIG. 2 is a perspective view showing a state in which a plurality of paper boxes shown in FIG. 1 are glued together. , FIG. 3 is a perspective view showing the state in which the cardboard for connecting the top and bottom sides is adhered to the paper box connector shown in FIG. 2, FIG. 4 is a plan view showing the cardboard for connecting the top side, and FIG. 5 6 is a plan view showing the cardboard for connecting the base side.
8 to 8 are explanatory diagrams showing the state when the paper box connected body according to the present invention was tested. Although omitted in FIGS. 1 to 3 to avoid complicating the drawings, the bottom surface of each box is constructed in the same manner as the top surface. 1 to 3, 1 is a paper box made of cardboard or the like, 2 is an inner flap thereof, 3 is an outer flap attached to the tab surface 4 of the paper box 1,
5 is a cardboard for connecting the top side made of cardboard or the like; 6
Reference numeral 7 indicates a base connecting cardboard made of cardboard or the like, and 7 indicates an adhesive applied in a dotted line pattern to a portion close to the ridgeline on the top and bottom sides of the opposing contact surfaces of the paper boxes 1. The paper box 1 shown in FIG. ), and as shown in FIG. 1A, it has a length L, a width W, a depth D, an inner flap length Fa, and an outer flap length Fb. Fa=Fb according to the shape rules
It has become so. Further, the relationship between the length Fa of the outer flap 3 and the length L of the paper box 1 is 2Fa<L, that is, Fa<1/2L. Therefore, in normal cardboard, the toe surface 4
Fold in the side flap 3 first (therefore, 3 becomes the inner flap), then fold in the side flap 2 on top of it.
However, when manufacturing the paper box connected body according to the present invention, contrary to the usual case,
First, fold in the side flap 2 as an inner flap as shown in Figure 1B, and then fold in the flap 2 in Figure 1C.
As shown in the figure, a paper box 1 is formed by folding the flap 3 on the side of the tab 4 as an outer flap, and gluing the inner flap and outer flap together with an adhesive such as hot melt glue. Next, as shown in FIG. 2, the paper boxes 1 formed as described above are arranged so that, for example, three inner flaps 2 are arranged adjacent to each other in parallel, and the paper boxes are shaped according to the weight of the contents. Apply adhesive in a dotted or linear manner parallel to the top and bottom ridge lines of the facing contact surfaces of the two, separated by an appropriate distance, and in such a way that the adhesive area is narrower on the top side than on the bottom side. 7 and join each paper box 1 to each other. Thereafter, as shown in FIG. 3, the cardboard 5 for connecting the top side and the cardboard 6 for connecting the bottom side are glued and fixed in the space between the outer flaps of the top and bottom sides of the paper box 1, respectively. It is something to do. These cardboard 5 for connecting the top side and the cardboard 6 for connecting the bottom side
The width is equal to or less than the width between the outer flaps of the paper box 1.
As shown in the figure, a cut tape 50 is provided at a portion corresponding to the opposing contact surfaces of the connected paper boxes 1. Further, as shown in FIG. 5, perforations 60 are provided in the base-side connecting cardboard 6 at a portion corresponding to the opposing contact surfaces of the connected paper boxes 1. Thus, the adhesive 7 for joining each of the boxes 1 together
The bonding force is weak against peeling perpendicular to the bonding surface, but shows strong resistance to shear failure parallel to the bonding surface. On the other hand, the bonding force of the top-side connecting cardboard 5 and the bottom-side connecting cardboard 6 is weak against shear failure, but exhibits strong resistance to peeling.
For this reason, even if this paper box connected body is subjected to rough handling and the joint portion is subjected to a combined external force of shearing and peeling, it will not break and will continue to maintain a strong connection. If you want to separate the paper boxes 1 from each other, you can pull the cut tape 50 to cut the top connecting cardboard 5, peel off the paper boxes 1 from the top, and cut the bottom connecting cardboard 6 at the perforations 60. . During this peeling operation, since the applied area of the adhesive 7 on the top side of the opposing contact surfaces of the paper boxes 1 is small and the bonding force is weak, the paper boxes 1 can be easily separated by peeling them off from the top side. It is. In addition, in the present invention, when three boxes are connected,
Compared to a single paper box of the same size as the connector 1, the compressive strength of the paper box is significantly improved even if the quality of the base paper constituting the corrugated board is reduced. Note that the present invention is not limited to the embodiments described above. That is, for example, the paper boxes to be connected are not limited to the A-1 type of JIS standard Z1507 mentioned above, but also the A-2 type, A-5 type, B-3 type,
It is also possible to use paper boxes such as B-4 type, B-6 type, C-3 type, etc., and the design of the present invention can be freely changed within the scope of its purpose. This includes all modifications that can be easily figured out by a person skilled in the art from the description of the drawings. Next, specific strength test results of the paper box connected body according to the present invention will be explained. The dimensions of the paper box used in the test are a = 280 mm, b = 140
mm, h=390mm. The adhesive was applied by "line application" as shown in FIG. In addition, if the height h of the paper box is 350 mm or more, the paper boxes can be stacked in 6 places on both the top and bottom sides as shown in the figure.
If the length is less than 350mm, it is sufficient to mark only the ground side in 3 places. The gluing position is d=e from the top and bottom ridge lines.
= 40 mm, and the glued surface was 3 mm wide x about 6 cm long, with 1 strip on the top side and 2 strips on the bottom side. The shape of the surface to which the adhesive was applied after adhesion was such that the single strip on the top side had a width of 5 to 10 mm, and the two strips on the bottom side had a combined width of 10 to 15 mm. Note that an application nozzle was used to apply the adhesive. The adhesive used was a commercially available ethylene vinyl acetate copolymer resin as shown below. Manufacturer Product name Mitsui Toatsu Chemical Co., Ltd. MTE Melt G131 Sekisui Chemical Co., Ltd. Esdyne 8512JS-1 Melt viscosity (180℃) 1100cp 1480cp (However, the melt viscosity conforms to JIS-K-6892.) Any adhesive may be used as long as its adhesive strength is greater than the surface strength of the paper (cardboard cover). The paper used for the cardboard was thinner than the conventional one, as shown below.

【表】上記の如くして製造した紙箱三個の連結体の落
下テストを行つた。ホツトメルト噴射エアー圧は現行では2.5Kg／
cm²であるが、テストでは3.5Kg／cm²、テスト
では2.5Kg／cm²とした。また、ホツトメルト噴射
時間は３段階タイマーを用いて現行では12ms／
17ms／17msとしているが、テストでは12ms／
17ms／17ms、テストでは20ms／28ms／28ms
とした。なお、落下テスト方法は、第７図に示すように
紙箱連結体を地側縁からコンクリート床へ自然落
下（落下高さｆ）させた。また、剥離応力測定では、第８図に示すように
連結体の上面の紙箱同士の当接部分に力を加えて
引つ張つた。そのテスト結果は次頁の通りである。[Table] A drop test was conducted on a connected body of three paper boxes manufactured as described above. The current hot melt injection air pressure is 2.5Kg/
cm ² , but in the test it was 3.5Kg/cm ² and in the test it was 2.5Kg/cm ² . In addition, the current hot melt injection time is 12ms/3 using a three-stage timer.
It is said to be 17ms/17ms, but in the test it was 12ms/17ms.
17ms/17ms, 20ms/28ms/28ms in test
And so. In the drop test method, as shown in FIG. 7, the connected paper box was allowed to fall naturally (falling height f) from the ground edge onto the concrete floor. In addition, in the peel stress measurement, as shown in FIG. 8, force was applied to and pulled the contact portion of the paper boxes on the top surface of the connector. The test results are shown on the next page.

〔Effect of the invention〕

本発明は叙上の如く構成されるので、本発明に
よるときは、複数個の紙箱を確実に、しかも頑丈
に連接することができ、かつ、使用時には個々の
紙箱に容易に分離できるものである。 Since the present invention is constructed as described above, according to the present invention, a plurality of paper boxes can be reliably and robustly connected, and can be easily separated into individual paper boxes when used. .

[Brief explanation of the drawing]

第１図は、本発明に係る重量物を収容した紙箱
連結体に利用する紙箱の組立状態を段階的に示し
た説明図、第２図は、第１図に示した紙箱を複数
個接着した状態を示す斜視図、第３図は、第２図
に示した紙箱連結体に天側及び地側連結用厚紙を
接着した状態を示す透視図、第４図は天側連結用
厚紙を示す平面図、第５図は地側連結用厚紙を示
す平面図、第６図ないし第８図は、本発明に係る
紙箱連結体のテストを行つた際の状態を示す説明
図である。１……紙箱、２……内フラツプ、３……外フラ
ツプ、４……つま面、５……天側連結用厚紙、５
０……カツトテープ、６……地側連結用厚紙、６
０……ミシン目、７……接着剤。 Fig. 1 is an explanatory diagram showing step-by-step the assembly state of a paper box used in the paper box assembly for storing heavy objects according to the present invention, and Fig. 2 shows a structure in which a plurality of paper boxes shown in Fig. 1 are glued together. FIG. 3 is a perspective view showing the state in which the cardboard for connecting the top and bottom sides is glued to the paper box connector shown in FIG. 2, and FIG. 4 is a plan view showing the cardboard for connecting the top side. FIG. 5 is a plan view showing the cardboard for connecting the bottom side, and FIGS. 6 to 8 are explanatory diagrams showing the state when the paper box connected body according to the present invention was tested. 1... Paper box, 2... Inner flap, 3... Outer flap, 4... Toe surface, 5... Cardboard for top side connection, 5
0... Cutting tape, 6... Cardboard for connecting the ground side, 6
0...Perforation, 7...Adhesive.

Claims

[Claims]

1 It has an inner flap on the long side and an outer flap whose length on the short side is not more than half the length of the long side of the paper box,
A plurality of relatively small paper boxes that store a small amount of heavy items are arranged so that their long sides are in opposing contact with each other, and a part near the top ridge line and a part near the bottom ridge line of the opposing contact surfaces of the paper boxes are arranged. , the adhesive is applied in a dotted or linear pattern so that the area close to the top ridgeline is narrower and the area closer to the bottom ridgeline is wider. The space between the side outer flaps has a width equal to or less than the space between the outer flaps of the paper box, and the top side connecting cardboard has a cut tape on the part corresponding to the opposing contact surfaces of the paper boxes. The space between the outer flaps on the bottom side has a width equal to or less than the gap between the outer flaps of the paper box, and a perforation is made at the part corresponding to the opposing contact line between the paper boxes. A connected paper box for storing heavy objects, which is made by gluing cardboard for connection on the base side.