JP3130248B2 - Paper buffer and its manufacturing apparatus - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、電気製品や精密機
器その他の各種物品を梱包する際に用いる梱包物品保護
用の緩衝体に関し、詳しくは、段ボール等の紙製板材か
らなるシート状基材を折り曲げて形成する紙製緩衝体及
びその製造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cushioning material for protecting packing articles used for packing electric appliances, precision instruments and other various articles, and more particularly, to a sheet-like base made of a cardboard or the like. And a device for manufacturing the same.

【０００２】[0002]

【従来の技術】旧来、段ボール箱等に梱包した物品を保
管時の積み上げ荷重や運搬時の落下衝撃等から保護する
ための緩衝体として、ウレタンフォームや発泡スチロー
ルからなる樹脂製緩衝体が用いられている。これら樹脂
製緩衝体は、前記積み上げ荷重に対する強度や落下衝撃
の吸収等に優れているものの、廃棄後の処理が難しいた
め環境に対する悪影響が懸念され、しかもリサイクルが
困難であり、近年における地球環境保護の気運の高まり
等からその使用を制限する方向にある。2. Description of the Related Art Conventionally, resin cushions made of urethane foam or styrene foam have been used as cushions for protecting articles packed in a cardboard box or the like from a stacking load during storage or a drop impact during transportation. I have. Although these resin shock absorbers are excellent in the strength against the stacked load and the absorption of a drop impact, etc., they are difficult to dispose after disposal, so there is a concern about adverse effects on the environment, and it is difficult to recycle them. There is a tendency to limit its use due to the rise of energy.

【０００３】一方、このような樹脂製保護体の代替品と
して、特開平６−３２３７３号には、紙製板材からなる
シート状基材（ブランク）で形成した紙製緩衝体が提案
されている。この紙製緩衝体は、物品の側面又は底面に
接する中央板の周囲四辺に内側板を連設し、各内側板の
外端に第１中間板を連設した第１ブランクと、前記中央
板と略同形の中央空所の周囲に第２中間板を有し、且つ
各第２中間板の外端に外側板を連設した第２ブランクと
からなり、それら２枚のブランクを上下に重ねて要所を
折り曲げ立体に組み立てるをもって、上記中央板の周囲
に内側板を立ち上げて物品の収納凹所を形成し、且つそ
の内側板の周囲には外側板を立ち上げ、且つそれら内外
側板の間には、第１中間板と第２中間板を重ねることで
空間を設けた二重構造としたものである。On the other hand, as an alternative to such a resin-made protective body, Japanese Patent Application Laid-Open No. Hei 6-32373 proposes a paper buffer made of a sheet-like base material (blank) made of a paper-made plate material. . The paper buffer includes a first blank in which inner plates are continuously connected to four sides around a central plate in contact with a side surface or a bottom surface of an article, and a first intermediate plate is connected to an outer end of each of the inner plates; And a second blank having a second intermediate plate around a central space having substantially the same shape as the second intermediate plate, and an outer plate connected to an outer end of each second intermediate plate. With the key points folded and assembled in three dimensions, the inner plate is raised around the central plate to form a storage recess for articles, and the outer plate is raised around the inner plate, and between the inner and outer plates. Has a double structure in which a space is provided by stacking a first intermediate plate and a second intermediate plate.

【０００４】[0004]

【発明が解決しようとする課題】しかし乍ら上記従来の
紙製緩衝体は少なくとも、ほぼ同じ大きさの２枚の紙製
板材を所定形状に打ち抜いて成形した２枚のブランクを
要し、組み立て時にそれら２枚のブランクを順次型にセ
ットするようになるので、製作時の工程が増えて組み立
てに手間がかかるばかりか、組み立て作業を自動化する
上での障害になるという問題があった。また、２枚のブ
ランクを用いながら、第２ブランクはその中央部に空所
を有するので、紙製板材の使用量が多く材料の無駄が生
じるという問題があった。さらに、上記空間は内外側板
の上端に位置する第１，第２中間板のみで保持され、そ
の下端側は開放されているので、強度面に不安を残すも
のであった。However, the above-mentioned conventional paper buffer requires at least two blanks formed by stamping out two paper plates having substantially the same size into a predetermined shape. Since these two blanks are sometimes set in order in a mold, there is a problem that not only the number of manufacturing steps is increased, but also assembling is troublesome, but also an obstacle in automating the assembling work. In addition, since two blanks are used and the second blank has an empty space in the center thereof, there is a problem that a large amount of paper board material is used and waste of material occurs. Further, the space is held only by the first and second intermediate plates located at the upper ends of the inner and outer plates, and the lower ends thereof are open.

【０００５】本発明は上述したような従来事情に鑑みて
なされたもので、その目的とする処は、紙製板材からな
るシート状基材を折り曲げて組み立てる紙製緩衝材にお
いて、用いるシート状基材の数を少なくして組み立て作
業の簡素化を図ると共に、紙製板材の無駄な使用を可能
な限り無くして、容易に且つ低コストで作製することが
でき、しかも旧来の樹脂製緩衝体と同等の緩衝機能を備
えた、新規な紙製保護体とその製造装置を提供すること
にある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to provide a sheet-like base material used in a paper-made cushioning material which is formed by folding a sheet-like base material made of a paper-made plate material. In addition to simplifying the assembly work by reducing the number of materials, it can be manufactured easily and at low cost by eliminating wasteful use of paper board materials as much as possible. An object of the present invention is to provide a novel paper protector having the same buffer function and a device for manufacturing the same.

【０００６】[0006]

【課題を解決するための手段】上述の目的を達成するた
めに本願の請求項１に係る発明は、紙製板材からなる１
枚のシート状基材を折り曲げ且つ要所を接着して、上面
側に梱包物品の嵌合用凹所を備え、且つその周壁は内外
二重構造をなす大略直方体形状に成形される紙製緩衝体
であって、上記シート状基材は、平面視略四角形状をな
す底面部と、該底面部の四辺から各々立ち上がる内側面
部と、それら各内側面部の端部から外方へ折れ曲がる上
縁面部と、それら各上縁面部の端部から下方へ折れ曲が
る外側面部と、それら各外側面部の内の相対する一対の
外側面部の端部に連設され該端部から内方へ折れ曲がる
下縁面部とを有し、上記底面部と各内側面部とで梱包物
品の嵌合用凹所を形成すると共に、該凹所の周囲を上記
各外側面部で囲んで内外二重壁構造となし、さらに上記
下縁面部は、前記嵌合用凹所の外側両端に嵌合する平面
視略コ形に形成し、該下縁面部とこれに連なる外側面
部、該外側面部に連なる上縁面部、該上縁面部に連なる
内側面部によって角筒状の壁部を形成したことを要旨と
する。In order to achieve the above-mentioned object, the invention according to claim 1 of the present application is an invention comprising a paper board material.
A paper buffer which is formed by folding a sheet-like base material and bonding important points to provide a fitting recess for a packaged article on the upper surface side, and the peripheral wall of which is formed into a substantially rectangular parallelepiped shape having an inner / outer double structure. The sheet-shaped base material has a bottom surface portion having a substantially square shape in a plan view, an inner surface portion rising from each of four sides of the bottom surface portion, and an upper edge surface portion bent outward from an end of each of the inner surface portions. An outer surface that bends downward from an end of each of the upper edge surfaces, and a lower edge surface that is connected to ends of a pair of opposing outer surfaces of the respective outer surface portions and that is bent inward from the ends. The bottom portion and each inner surface portion form a recess for fitting a packaged article, and the recess is surrounded by the outer surface portions to form an inner / outer double wall structure, and further, the lower edge surface portion Is formed in a substantially U shape in plan view to be fitted to both outer ends of the fitting recess. Lower edge surface and the outer surface portion contiguous thereto, the upper edge surface portion continuous with the outer side surface portion, and summarized in that the formation of the rectangular tube-shaped wall portion by an inner surface continuous with the upper edge surface portion.

【０００７】以上の構成によれば、１枚の紙製板材を所
定形状に打ち抜いて成形した１枚のシート状基材によっ
て、梱包物品の嵌合用凹所を有すると共に、該凹所は内
側面部と外側面部とで周壁を形成し、且つその周壁にお
ける相対向する一対の壁部は角筒状をなす紙製緩衝体が
得られる。よって該紙製緩衝体は、周壁が内外二重構造
であって且つその周壁が部分的に角筒形状をなすので、
周壁部が単なる内外二重構造であって周壁下面側が開放
している従来の構造に比べ、強度、耐久性、衝撃吸収性
に優れた効果が得られる。また１枚のシート状基材によ
って作製されるので、組み立て作業の簡素化を図ると共
に、紙製板材の無駄な使用を可能な限り少なくすること
ができる。According to the above construction, a single sheet-like base material formed by punching a single sheet of paper into a predetermined shape has a recess for fitting a packaged article, and the recess has an inner surface. And the outer side surface portion, a peripheral wall is formed, and a pair of opposing wall portions on the peripheral wall form a rectangular cylinder-shaped paper cushion. Therefore, the paper buffer has a double-walled inner / outer peripheral wall, and the peripheral wall has a partially rectangular tube shape.
As compared with the conventional structure in which the peripheral wall portion has a simple inner / outer double structure and the lower surface side of the peripheral wall is open, effects excellent in strength, durability, and shock absorption can be obtained. Further, since it is made of one sheet-like base material, the assembling work can be simplified, and wasteful use of the paper plate material can be reduced as much as possible.

【０００８】また本願の請求項１に係る発明は上記構成
に加え、上記各内側面部の内の相対する一対の内側面部
の左右両側に、内側へ折れ曲がり隣合う内側面部と重な
り合う内側補強片を設けると共に、上記各外側面部の内
の相対する一対の外側面部の左右両側に、内側へ折れ曲
がり隣合う外側面部と重なり合う外側補強片を設け、且
つ上記各上縁面部の内の平行に位置する一対の上縁面部
を、嵌合用凹所の外側両端に嵌合する平面視略コ形に形
成するという構成を備えている。 The invention according to claim 1 of the present application has the above-mentioned configuration.
In addition, on both left and right sides of a pair of inner side portions facing each other among the inner side portions, an inner reinforcing piece that is bent inward and overlaps with the adjacent inner side portion is provided, and a pair of opposite outer side portions of the respective outer side portions is provided. On both left and right sides, an outer reinforcing piece that is bent inward and overlaps with an outer side surface adjacent to the outer side surface is provided, and a pair of upper edge surface portions of each of the upper edge surface portions, which are positioned in parallel, are fitted to both outer ends of the fitting recess. It is configured to be formed in a substantially U shape in plan view .

【０００９】この構成により、内側補強片によって嵌合
用凹所の内周壁が部分的に二重構造となり、外側補強片
によって嵌合用凹所の外周壁が部分的に二重構造とな
り、嵌合用凹所の外側に嵌合する略コ形の上縁面部の左
右両側部によって嵌合用凹所の上縁周面部が部分的に二
重構造になり、これらの相乗効果によって、紙製緩衝体
の強度、耐久性、衝撃吸収性がより向上する。 With this configuration , the inner peripheral wall of the fitting recess is partially double-structured by the inner reinforcing piece, and the outer peripheral wall of the fitting recess is partially double-structured by the outer reinforcing piece. The upper edge peripheral surface of the fitting recess has a partially double structure due to the left and right sides of the substantially U-shaped upper edge surface that fits outside the place. , Durability and shock absorption are further improved.

【００１０】さらに本願の請求項１に係る発明は上記構
成に加え、上記各内側面部の内の相対する一対の内側面
部の左右両側に、上記嵌合用凹所の外側に嵌合した下縁
面部の下面に係合する係合片を突設すると共に、上記下
縁面部には、下方へ折れ曲がり内側面部の外面に当接す
る支承片を設けるという構成を備えている。 Further, the invention according to claim 1 of the present application has the above structure.
In addition to the above, on both left and right sides of a pair of opposed inner side surfaces of the respective inner side surface portions, an engagement piece that engages with a lower surface of a lower edge surface portion fitted outside the fitting recess is projected and provided. The lower edge portion has a structure in which a support piece that bends downward and contacts the outer surface of the inner side surface portion is provided .

【００１１】この構成により、嵌合用凹所の外側に嵌合
した下縁面部の下方への移動を係合片で規制すると共
に、上方への移動を支承片で規制して、該下縁面部の嵌
合状態を所要の強度をもって保持し、組み立て最終工程
になる下縁面部の曲げ形成を接着剤を用いる事なく容易
且つ確実に行うことができるようになる。また支承片に
よって、嵌合用凹所の外側面が部分的に二重構造とな
り、上述した相乗効果と相俟って、紙製緩衝体の強度、
耐久性、衝撃吸収性のさらなる向上が期待できる。 With this configuration , the downward movement of the lower edge portion fitted to the outside of the fitting recess is restricted by the engagement piece, and the upward movement is restricted by the support piece. Is held with a required strength, and the lower edge portion, which is the final assembly step, can be formed easily and reliably without using an adhesive. In addition, the outer side surface of the fitting recess is partially double-structured by the bearing piece, and in combination with the above-described synergistic effect, the strength of the paper buffer,
Further improvements in durability and shock absorption can be expected.

【００１２】またこのような紙製緩衝体を製造する製造
装置としては、上面をシート状基材の底面部の支承面と
し、下端周縁にシート状基材の上縁面部を挟持するため
の鍔部を突設した中型と、前記支承面の周囲に突出した
シート状基材の内側補強片を下方へ曲げ形成する出没自
在なガイドピンと、該内側補強片の折り曲げに前後して
該内側補強片を有する内側面部を中型の外側に曲げ形成
する上下摺動可能な第一ガイド板と、前記内側補強片と
内側面部の折り曲げ後に内側補強片を備えない内側面部
を中型の外側に曲げ形成する第二ガイド板とを有し、前
記第一及び第二ガイド板の下端部には上記鍔部と共にシ
ート状基材の上縁面部を挟持する挟持面を設けた上型
と、型合せした上型と中型の周囲に突出したシート状基
材の外側面部を上型の外面に沿って曲げ形成するための
囲み枠を備えた下型とからなり、前記囲み枠内に上記中
型を上下動可能に配すると共に、該中型は弾発部材で上
方へ付勢し、且つ囲み枠の上端には、上記外側面部の折
り曲げに先立ち外側補強片を上方へ曲げ形成するガイド
凸部を設け、さらに囲み枠内面と中型の間には、上記外
側補強片とこれに重なる外側面部とを中型に向けて押圧
する押圧面を備えた押圧板を傾動可能に支持し、中型の
下降に伴い該押圧板が傾動し前記押圧面による押圧力が
働くよう構成した製造装置がある。Further, as a manufacturing apparatus for manufacturing such a paper cushion, a flange for holding an upper edge surface portion of a sheet-like base material at a lower peripheral edge thereof is used as a support surface of a bottom surface portion of a sheet-like base material. A projecting portion, a guide pin that can be bent downward to form an inner reinforcing piece of a sheet-like base material protruding around the bearing surface, and an inner reinforcing piece before and after bending of the inner reinforcing piece. A first guide plate slidable up and down for forming an inner side surface portion outside the middle die having a bent portion, and forming an inner side portion having no inner reinforcing portion after bending the inner reinforcing portion and the inner side portion outside the middle size portion. An upper mold having two guide plates, and an upper mold having a clamping surface at the lower end portions of the first and second guide plates together with the flange portion for clamping an upper edge surface portion of the sheet-like base material; And the outer surface of the sheet-like base material protruding around the middle mold A lower mold having an enclosing frame for bending and forming along the outer surface, wherein the middle die is disposed in the enclosing frame so as to be vertically movable, and the middle die is urged upward by a resilient member, and At the upper end of the enclosing frame, there is provided a guide convex portion for bending the outer reinforcing piece upward before bending the outer surface portion, and further, between the inner surface of the enclosing frame and the middle die, the outer reinforcing piece and the outer surface portion overlapping therewith There is a manufacturing apparatus configured to tiltably support a pressing plate having a pressing surface that presses the pressing member toward a middle die, and to tilt the pressing plate with the lowering of the middle die so that a pressing force by the pressing surface acts.

【００１３】該製造装置によれば、中型上面（支承面）
にてシート状基材の底面部を支承する状態で上型が下降
すると、まずガイドピンと第一ガイド板とで内側補強片
とこれを有する内側面板が曲げ形成され、次いで第二ガ
イド板で内側補強片を備えない内側面板が曲げ形成され
る。ガイドピンと第一ガイド板は中型下端周縁の鍔部に
当接すると上方へ摺動し、上型は引き続き下降する。そ
うして、第二ガイド板が前記鍔部に当接した時点で、底
面部の四辺に内側面部が各々立ち上がると共に、内側補
強片が隣合う内側面部と重なり合って、梱包物品の嵌合
用凹所が形成され、この時、第一及び第二ガイド板の下
端挟持面と前記鍔部とで、シート状基材の各上縁面部を
挟持する。この状態からさらに上型を下降させ、弾発部
材の弾性に抗して中型を囲み枠内に下降させると、型合
せした上型と中型の周囲に突出したシート状基材の外側
補強片がガイド凸部で曲げ形成され、次いで囲み枠によ
り各外側面部が曲げ形成されて、内外二重壁構造の嵌合
用凹所が形成される。さらに中型の下降に伴い、押圧板
が傾動して押圧面が外側面部を中型方向へ押圧して、外
側の周壁部の要所にもうけた接着部を強固に接着させ
る。以上の工程が終了すると上型が上昇して中型から離
型し、組み立てられた紙製緩衝体を取り出す工程に移る
が、該離型時に、ガイドピン及び第一ガイド板による付
勢力が働き、紙製緩衝体を中型上に残して迅速に取り出
せるようにする。According to the manufacturing apparatus, the upper surface of the middle mold (the bearing surface)
When the upper die is lowered while supporting the bottom portion of the sheet-like base material, the inner reinforcing plate and the inner surface plate having the same are bent and formed by the guide pins and the first guide plate, and then the inner guide plate is bent by the second guide plate. An inner surface plate without a reinforcing piece is bent and formed. When the guide pin and the first guide plate come into contact with the flange at the lower edge of the middle mold, they slide upward, and the upper mold continues to descend. Then, when the second guide plate abuts against the flange portion, the inner side surface portions rise on the four sides of the bottom surface portion, and the inner reinforcing piece overlaps with the adjacent inner side surface portion, so that the recess for fitting the packaged article is formed. At this time, the upper edge surfaces of the sheet-shaped base material are held between the lower end holding surfaces of the first and second guide plates and the flange. When the upper mold is further lowered from this state, and the middle mold is lowered into the surrounding frame against the elasticity of the resilient member, the outer reinforcing pieces of the sheet-shaped base material protruding around the upper mold and the middle mold are matched. The outer convex portion is bent by the guide convex portion, and then each outer surface portion is bent by the surrounding frame to form the fitting recess of the inner / outer double wall structure. Further, as the middle die is lowered, the pressing plate is tilted, and the pressing surface presses the outer surface portion toward the middle die, thereby firmly bonding the bonding portion formed at a key portion of the outer peripheral wall portion. When the above process is completed, the upper die is lifted and released from the middle die, and the process moves to a step of taking out the assembled paper buffer.At the time of the release, the urging force by the guide pins and the first guide plate acts, Leave the paper buffer on the medium size for quick removal.

【００１４】[0014]

【発明の実施の形態】以下、本発明の実施の形態を説明
する。図１〜図３は紙製緩衝体、図４はシート状基材、
図５〜図８は製造装置を示す。Embodiments of the present invention will be described below. 1 to 3 are paper cushions, FIG. 4 is a sheet-like base material,
5 to 8 show a manufacturing apparatus.

【００１５】紙製保護体ａは、この種技術分野において
周知な紙製板材、例えば積層段ボール等の板紙を所要形
状に型抜きし、且つ所定箇所に谷折り目、山折り目を型
押し等により施してなる１枚のシート状基材ａ’を用
い、該シート状基材ａ’を各折り目に沿って折り曲げ且
つ要所を接着して、上面側に梱包物品の嵌合用凹所ａ1
を備え且つその周壁は内外二重壁構造をなす大略直方体
形状に成形される。The paper protector a is formed by cutting a paper board material, for example, a cardboard such as a laminated corrugated cardboard, into a required shape, and applying a valley fold or a mountain fold to a predetermined portion by embossing or the like. Using a single sheet-like base material a ', the sheet-like base material a' is bent along each fold line, and key portions are bonded to each other.
And its peripheral wall is formed in a substantially rectangular parallelepiped shape having an inner / outer double wall structure.

【００１６】シート状基材ａ’は図４に示すように、梱
包物品を嵌合用凹所ａ1 に確実に収めることができる程
度の大きさに形成された平面視略矩形状をなす底面部１
と、該底面部１の外周四辺である長辺側，短辺側の谷折
り目１ａ，１ｂに連続して形成され、該谷折り目１ａ，
１ｂから立ち上がって嵌合用凹所ａ1 及びその内周壁ａ
2 を構成する長辺側と短辺側の夫々の内側面部２，３
と、それら各内側面部２，３の端部である山折り目２
ａ，３ａに連続して形成され、該山折り目２ａ，３ａか
ら外方へ折れ曲がって上周壁ａ3 を構成する長辺側と短
辺側の夫々の上縁面部４，５と、それら各上縁面部４，
５の端部である山折り目４ａ，５ａに連続して形成さ
れ、該山折り目４ａ，５ａから下方へ折れ曲がって外周
壁ａ4 を構成する長辺側と短辺側の夫々の外側面部６，
７と、前記短辺側の外側面部７の端部である山折り目７
ａに連続して形成され、該山折り目７ａから内方へ折れ
曲がる下縁面部８とを有する。As shown in FIG. 4, the sheet-like base material a 'has a bottom portion 1 having a substantially rectangular shape in a plan view and formed in such a size that the packaged article can be securely accommodated in the fitting recess a1.
And the valley folds 1a, 1b formed on the long side and the short side, which are the four sides of the outer periphery of the bottom surface part 1, are formed continuously.
1b and the fitting recess a1 and its inner peripheral wall a
2, the inner surface portions 2 and 3 on the long side and the short side, respectively.
And the mountain fold 2 which is the end of each of the inner side surfaces 2 and 3
a, 3a, which are bent outward from the mountain folds 2a, 3a to form the upper peripheral wall a3. Edge part 4,
5 are formed continuously with the mountain folds 4a, 5a which are the end portions of the outer peripheral wall a4, and are bent downward from the mountain folds 4a, 5a to form the outer peripheral wall a4.
7 and a mountain fold 7 which is an end of the outer side surface 7 on the short side.
a, and has a lower edge surface portion 8 that is bent inward from the mountain fold 7a.

【００１７】尚、図４はシート状基材ａ’の平面図を示
すが、シート状基材ａ’の平面側は、紙製緩衝体ａにお
ける嵌合用凹所ａ1 の内面側（内周壁ａ2 の内面側）、
上周壁ａ3 の上面側、外周壁ａ4 の外面側を構成するよ
うになる。FIG. 4 is a plan view of the sheet-like base material a '. The flat side of the sheet-like base material a' is located on the inner surface side (the inner peripheral wall a2) of the fitting recess a1 in the paper buffer a. Inside)
The upper peripheral wall a3 constitutes the upper surface side and the outer peripheral wall a4 constitutes the outer surface side.

【００１８】長辺側と短辺側の内側面部２，３は底面部
１の長辺，短辺とほぼ同じ長さ（幅）に形成する。また
長辺側の内側面部２の左右両端部である谷折り目２ｂに
は、該谷折り目２ｂから内側へ折れ曲がり、隣合う短辺
側の内側面部３の内側に重なる内側補強片９を設ける。The inner side surfaces 2 and 3 on the long side and the short side are formed to have substantially the same length (width) as the long side and the short side of the bottom 1. In the valley fold 2b, which is both right and left ends of the inner surface 2 on the long side, there is provided an inner reinforcing piece 9 which is bent inward from the valley fold 2b and overlaps the inside of the inner surface 3 on the adjacent short side.

【００１９】長辺側と短辺側の夫々の上縁面部４，５
は、連設される内側面部２，３よりも若干長く形成し
て、その左右両側に、隣り合う上縁面部４，５の左右両
端と上下に重なる重合片４ｂ，５ｂを備える。また短辺
側の上縁面部５には、前記重合片５ｂから内方に突出し
て長辺側の内側面部２の外側に沿う突片５ｃを設けて、
嵌合用凹所ａ1 の外側両端に嵌合可能な平面視略コ形に
形成する。Upper edge portions 4, 5 on the long side and the short side, respectively.
Is formed to be slightly longer than the inner surface portions 2 and 3 that are continuously provided, and has, on both left and right sides thereof, overlapping pieces 4b and 5b that vertically overlap the left and right ends of the adjacent upper edge surface portions 4 and 5, respectively. Further, a protruding piece 5c protruding inward from the overlapping piece 5b and extending along the outer side of the inner side face part 2 on the long side is provided on the upper edge 5 of the short side.
It is formed in a substantially U-shape in a plan view so as to be fitted to both outer ends of the fitting recess a1.

【００２０】長辺側と短辺側の外側面部６，７は、連設
される上縁面部４，５とほぼ同じ長さに形成する。また
長辺側の外側面部６の左右両側には、山折り目６ａから
内側へ折れ曲がり、隣合う短辺側の外側面部７の内側に
重なる外側補強片１０を設ける。The outer surface portions 6 and 7 on the long side and the short side are formed to have substantially the same length as the upper edge portions 4 and 5 provided continuously. Further, on both left and right sides of the outer side portion 6 on the long side, there are provided outer reinforcing pieces 10 which are bent inward from the mountain folds 6a and overlap the inside of the outer side portion 7 on the adjacent short side.

【００２１】下縁面部８は短辺側の外側面部７とほぼ同
じ長さに形成する。またその端部は、嵌合用凹所ａ1 の
外側両端に嵌合可能な凹部１１を切欠して、平面視略コ
形に形成する。前記凹部１１で囲まれた部分には、谷折
り目１１ａに連設され、該谷折り目１１ａから下方へ折
れ曲がり短辺側の内側面部３の外面に当接する支承片１
２を設ける。The lower edge 8 is formed to have substantially the same length as the outer side 7 on the short side. In addition, the end portion is formed in a substantially U-shape in plan view by cutting out a concave portion 11 that can be fitted to both outer ends of the fitting concave portion a1. A support piece 1 is provided at a portion surrounded by the concave portion 11 so as to be continuous with the valley fold 11a and bends downward from the valley fold 11a to abut on the outer surface of the inner side surface portion 3 on the short side.
2 is provided.

【００２２】また短辺側の内側面部３の左右両側には、
嵌合用凹所ａ1 の外側に嵌合した下縁面部８の下面に係
合する係合片１３を適宜高さ位置に突設する。On the left and right sides of the inner surface 3 on the short side,
An engaging piece 13 that engages with the lower surface of the lower edge 8 fitted outside the fitting recess a1 is protruded at an appropriate height.

【００２３】底面部１には、後述する製造装置にシート
状基材ａ’をセットするための位置決め孔１４を左右二
箇所に開穿する。Positioning holes 14 for setting a sheet-like base material a 'in a manufacturing apparatus to be described later are formed in the bottom portion 1 at two places on the left and right.

【００２４】上述したシート状基材ａ’は、夫々の内側
面部２，３を底面部１の四辺に沿って立ち上げると共
に、内側補強片９を内側へ折り曲げ短辺側の内側面部３
の内側に重ね合わせて、嵌合用凹所ａ1 及びその内周壁
ａ2 を構成する。さらに、短辺側の上縁面部５を嵌合用
凹所ａ1 の左右外側に嵌合させながら内側面部３の外側
に折り曲げ、長辺側の上縁面部４を内側面部２の外側に
折り曲げ、且つ重合片４ｂ，５ｂを上下に重ねて上周壁
ａ3 を構成する。さらに、夫々の外側面部６，７を上縁
面部４，５の外側に折り曲げると共に、外側補強片１０
を内側へ折り曲げ短辺側の外側面部７の内側に重ね合わ
せて、外周壁ａ4 を構成する。さらに、下縁面部８を外
側面部７の内側に折り曲げて凹部１１を嵌合用凹所ａ1
の外側両端に嵌合させ、その下面側を係合片１３に当接
係合させると共に、支承片１２を谷折り目１１ａから下
方へ折り曲げて内側面部３の外面に当接させる。In the above-mentioned sheet-shaped base material a ', the respective inner surface portions 2 and 3 are raised along the four sides of the bottom portion 1 and the inner reinforcing pieces 9 are bent inward to form the inner surface portions 3 on the short side.
To form a fitting recess a1 and its inner peripheral wall a2. Further, the upper edge 5 of the shorter side is bent outwardly of the inner side 3 while being fitted to the left and right outer sides of the fitting recess a1, and the upper edge 4 of the longer side is bent out of the inner side 2, and The superposed pieces 4b and 5b are vertically stacked to form an upper peripheral wall a3. Further, each of the outer surface portions 6 and 7 is bent outside the upper edge surface portions 4 and 5, and the outer reinforcing pieces 10
Is bent inward and overlapped with the inside of the outer side surface portion 7 on the short side side to form an outer peripheral wall a4. Further, the lower edge 8 is bent inward of the outer surface 7 to form the recess 11 with the fitting recess a1.
And the lower surface thereof is brought into contact with and engaged with the engagement piece 13, and the support piece 12 is bent downward from the valley fold line 11 a to make contact with the outer surface of the inner side surface portion 3.

【００２５】このようにして組み立てられた紙製緩衝体
ａは、梱包物品の嵌合用凹所ａ1 を有すると共に、内周
壁ａ2 と外周壁ａ4 を備えた内外二重壁構造であって、
且つその周壁の相対向する一対の部分に、内側面部３、
上縁面部５、外側面部７、下縁面部８からなる角筒形状
部ａ5 が夫々形成されるので、周壁部が単なる内外二重
構造であって周壁下面側が開放している従来の緩衝体に
比べ、強度、耐久性、衝撃吸収性に優れた効果が得られ
る。The paper buffer body a assembled in this manner has an inner / outer double wall structure having an inner peripheral wall a2 and an outer peripheral wall a4 while having a recess a1 for fitting a packaged article.
And a pair of opposing portions of the peripheral wall,
Since the rectangular tube-shaped portion a5 composed of the upper edge surface portion 5, the outer surface portion 7, and the lower edge surface portion 8 is formed respectively, the conventional shock absorber in which the peripheral wall portion has a simple inner / outer double structure and the lower surface side of the peripheral wall is open. In comparison, effects excellent in strength, durability, and shock absorption are obtained.

【００２６】また内側補強片９と内側面部３、外側補強
片１０と外側面部７、重合片４ｂと重合片５ｂ，突片
５、支承片１２と内側面部３が夫々内外若しくは上下に
重なり合うことから、内周壁ａ2 、上周壁ａ3 、外周壁
ａ4 の要所が多層構造となり、上述した効果と相俟っ
て、強度、耐久性、衝撃吸収性のさらなる向上が期待で
きる。Also, since the inner reinforcing piece 9 and the inner face 3, the outer reinforcing piece 10 and the outer face 7, the superposed piece 4 b and the superposed piece 5 b, the protruding piece 5, and the support piece 12 and the inner side face 3 are overlapped inside or outside or up and down, respectively. The essential parts of the inner peripheral wall a2, the upper peripheral wall a3, and the outer peripheral wall a4 have a multilayer structure, and together with the above-described effects, further improvement in strength, durability, and shock absorption can be expected.

【００２７】尚、上記紙製緩衝体ａはシート状基材ａ’
を折り曲げると共に要所を接着して組み立てられるが、
その接着箇所は適宜に設定され、例えば重合片４ｂと５
ｂ、外側補強片１０と外側面部７を接着することが考え
られる。The above-mentioned paper buffer body a is a sheet-like base material a '.
Can be assembled by bending and bonding the key points,
The bonding portion is appropriately set, for example, the polymer pieces 4b and 5
b, it is conceivable to bond the outer reinforcing piece 10 and the outer surface 7.

【００２８】また内側補強片９を短辺側の内側面部３に
設ける、外側補強片１０を短辺側の外側面部７に設け
る、係合片１３を長辺側の内側面部２に設ける等の変更
は、任意に選択可能であることは云うまでもない。Also, the inner reinforcing piece 9 is provided on the inner surface 3 on the shorter side, the outer reinforcing piece 10 is provided on the outer surface 7 on the shorter side, the engaging piece 13 is provided on the inner surface 2 on the longer side, and so on. It goes without saying that changes can be arbitrarily selected.

【００２９】次に、上述した紙製緩衝体ａの製造装置
を、図５〜図８を参照して説明する。図中１００は中
型、２００は上型、３００は下型を示す。Next, an apparatus for manufacturing the above-mentioned paper buffer a will be described with reference to FIGS. In the figure, 100 indicates a middle mold, 200 indicates an upper mold, and 300 indicates a lower mold.

【００３０】中型１００は、上記嵌合用凹所ａ1 を形成
可能なように略直方体形状に形成し、その上面をシート
状基材ａ’の底面部１の支承面１０１とする。また中型
１００の下端周縁には、シート状基材ａ’の上縁面部
４，５を挟持するための鍔部１０２を突設する。鍔部１
０２の外周四辺には側面板１０３、１０４を垂設し、短
辺側に設けた側面板１０３は、後述する押圧板３０７を
作動させるための作動板となす。また各側面板１０３、
１０４の外面には、中型１００の上下摺動をガイドする
ピン１０５を突設する。支承面１０１には、上記位置決
め孔１４に挿入する位置決めピン１０６を突設し、シー
ト状基材ａ’を図４に示す平面側を下にして載承する。The middle mold 100 is formed in a substantially rectangular parallelepiped shape so that the fitting recess a1 can be formed, and its upper surface is used as a bearing surface 101 of the bottom portion 1 of the sheet-like base material a '. Further, a flange portion 102 for holding the upper edge portions 4 and 5 of the sheet-shaped base material a 'is provided on the periphery of the lower end of the middle die 100 so as to protrude. Collar 1
Side plates 103 and 104 are provided on four sides of the outer periphery of 02, and the side plate 103 provided on the short side is an operation plate for operating a pressing plate 307 described later. Also, each side plate 103,
On the outer surface of 104, a pin 105 for guiding the middle die 100 up and down is projected. Positioning pins 106 to be inserted into the positioning holes 14 protrude from the bearing surface 101, and the sheet-like base material a 'is mounted with the flat side shown in FIG.

【００３１】上型２００は、不図示の昇降駆動機構によ
り昇降動自在に支持した可動盤２０１の下面に、上記支
承面１０１の周囲に突出した短辺側の内側面部３，３を
中型１００の外側に曲げ形成する第二ガイド板２０２，
２０２を移動不能に垂設する。それら第二ガイド板２０
２の対向面には第一段部２０３と第二段部２０４を夫々
設け、両第一段部２０３間に第一天板２０５を、両第二
段部２０４間に第二天板２０６を載承すると共に、それ
ら天板２０５，２０６は可動盤２０１との間に配したス
プリング２０７，２０８で下方へ付勢する。The upper die 200 has inner surfaces 3, 3 on the short side protruding around the bearing surface 101 on the lower surface of a movable plate 201 supported by a lifting drive mechanism (not shown) so as to be movable up and down. A second guide plate 202 bent outwardly,
202 is vertically immovable. Those second guide plates 20
2 are provided with a first step 203 and a second step 204, respectively. A first top plate 205 is provided between the first steps 203, and a second top 206 is provided between the second steps 204. At the same time, the top plates 205 and 206 are urged downward by springs 207 and 208 disposed between the top plate 205 and the movable plate 201.

【００３２】第二天板２０６の四角にはガイド孔２０９
を開穿すると共に、第一天板２０５の四角にはそのガイ
ド孔２０９に遊挿するガイド柱２１０を垂設して、第二
天板２０６の上下摺動をガイドするようにする。A guide hole 209 is formed in the square of the second top plate 206.
In addition, a guide column 210 which is loosely inserted into the guide hole 209 is vertically provided in a square of the first top plate 205 to guide the second top plate 206 to slide up and down.

【００３３】第二天板２０６には、上記支承面１０１の
周囲に突出した長辺側の内側面部２，２を中型１００の
外側に曲げ形成する第一ガイド板２１１，２１１を垂設
する。また第二ガイド板２０２の下面には、上記支承面
１０１の周囲に突出した内側補強片９を下方へ曲げ形成
するガイドピン２１２を出没自在に突設し、このガイド
ピン２１２は不図示のスプリングで下方へ付勢する。On the second top plate 206, first guide plates 211 and 211 are formed so as to bend the long side inner surface portions 2 and 2 protruding around the bearing surface 101 to the outside of the middle die 100. A guide pin 212 is formed on the lower surface of the second guide plate 202 so that the inner reinforcing piece 9 projecting around the bearing surface 101 is bent downward. To urge downward.

【００３４】そうして図示するように、第二ガイド板２
０２をガイドピン２１２、第一ガイド板２１１より上位
に位置させ、可動盤２０１の下降に伴いガイドピン２１
２が内側補強片９を曲げ形成し、該内側補強片９の折り
曲げ後に、第一ガイド板２１１が長辺側の内側面部２を
曲げ形成し、しかる後、第二ガイド板２０２が短辺側の
内側面部３を曲げ形成するように構成する。Then, as shown, the second guide plate 2
02 is positioned higher than the guide pin 212 and the first guide plate 211, and the movable
2 bends the inner reinforcing piece 9, and after bending the inner reinforcing piece 9, the first guide plate 211 bends the inner surface 2 on the long side, and then the second guide plate 202 is bent on the short side. Is formed so as to bend the inner surface 3.

【００３５】第一ガイド板２１１、第二ガイド板２０２
の下端部は、上記鍔部１０２と共にシート状基材ａ’の
上縁面部４，５を挟持する挟持面２１３、２１４とな
し、中型１００と上型２００が型合わせされた状態で各
内側面部２，３及び内側補強片９が曲げ形成されて内周
壁ａ2 が形成され、且つ上縁面部４，５が外側に曲げ形
成されて上周壁ａ3 が形成されるようになる。First guide plate 211, second guide plate 202
Of the sheet-shaped base material a ′ together with the flanges 102 are formed as holding surfaces 213 and 214 for holding the upper edge portions 4 and 5 of the sheet-like base material a ′. The inner peripheral wall a2 is formed by bending the inner reinforcing pieces 9 and the inner reinforcing piece 9 and the upper peripheral wall a3 is formed by bending the upper edge portions 4 and 5 outward.

【００３６】下型３００は、型合せした上型２００と中
型１００の周囲に突出したシート状基材の外側面部６，
７を、上型２００の外面、すなわち、第一ガイド板２１
１と第二ガイド板２０２の外側に沿って曲げ形成するた
めの囲み枠３０１を備える。囲み枠３０１は不図示の基
台上に設置した固定盤３０２上に固定する。The lower mold 300 is composed of a sheet-like base material protruding around the upper mold 200 and the middle mold 100 that have been combined.
7, the outer surface of the upper mold 200, that is, the first guide plate 21
An enclosing frame 301 is formed to bend along the outside of the first and second guide plates 202. The surrounding frame 301 is fixed on a fixed board 302 installed on a base (not shown).

【００３７】囲み枠３０１の内側には上記中型１００を
上下動可能に配すると共に、該中型１００は、固定盤３
０２上に設置したスプリング３０３で上方へ付勢し、鍔
部１０２が囲み枠３０１の上端部より上位に位置するよ
う支持する。The middle mold 100 is disposed inside the surrounding frame 301 so as to be able to move up and down.
The upper portion of the surrounding frame 301 is supported by the spring 303 urged upward by a spring 303 installed on the upper portion 02.

【００３８】また囲み枠３０１には、上述したピン１０
５が遊挿されるガイド孔３０４を上下方向に長く開穿す
る。また囲み枠３０１の上端所定箇所には、上記外側面
部６，７の折り曲げに先立ち各外側補強片１０を上方へ
曲げ形成するガイド凸部３０５を設ける。The above-mentioned pin 10
The guide hole 304 into which the 5 is loosely inserted is vertically long. At a predetermined position on the upper end of the surrounding frame 301, a guide convex portion 305 is formed to bend the outer reinforcing pieces 10 upward before bending the outer surface portions 6 and 7.

【００３９】囲み枠３０１における上述した側面板１０
３と対向する枠板３０６は、該側面板１０３から離間せ
しめてその内側に押圧板３０７を配する。また前記枠板
３０６の下端側には通孔３０８を貫通開穿し、該通孔３
０８にアジャスタボルト３０９を遊挿すると共に、該ボ
ルト３０９に螺嵌したナット３１０を前記枠板３０６の
外側に位置させる。The above-mentioned side plate 10 in the surrounding frame 301
The frame plate 306 facing 3 is separated from the side plate 103, and the pressing plate 307 is arranged inside the frame plate 306. At the lower end of the frame plate 306, a through hole 308 is formed.
08, the adjuster bolt 309 is loosely inserted, and the nut 310 screwed to the bolt 309 is positioned outside the frame plate 306.

【００４０】押圧板３０７は、その上端部分を、上記外
側補強片１０とこれに重なる短辺側の外側面部７とを中
型１００に向けて押圧する押圧面３１１となし、前記枠
板３０６と側面板１０３との間に起立状に配される。押
圧板３０７の下端側には、前記アジャスタボルト３０９
の内端が螺嵌するネジ孔３１２を形成すると共に、枠板
３０６との間に配したスプリング３１３により同下端側
を内方へ付勢する。The pressing plate 307 has, at its upper end portion, a pressing surface 311 for pressing the outer reinforcing piece 10 and the outer side surface portion 7 on the short side that overlaps the outer reinforcing piece 10 toward the middle mold 100, and the pressing plate 307 is in close contact with the frame plate 306. It is arranged upright between the face plate 103. At the lower end of the pressing plate 307, the adjuster bolt 309 is provided.
A screw hole 312 into which the inner end of the frame is screwed is formed, and the lower end is urged inward by a spring 313 disposed between the frame and the frame plate 306.

【００４１】さらに押圧板３０７の下端には上記側面板
１０３の下方に位置する受板３１４を突設し、中型１０
０の下降により側面板１０３下端が受板３１４に当接し
てこれを押し下げ、これに伴い押圧板３０７が傾動し、
押圧面３１１が外側補強片１０と外側面部７を中型１０
０に向けて押圧するように構成する。またアジャスタボ
ルト３０９を螺動進退させることで押圧板３０７の傾斜
角度を調整し、前記押圧面３１１による押圧力を適宜に
設定できるように構成する。At the lower end of the pressing plate 307, a receiving plate 314 located below the side plate 103 is provided so as to project therefrom.
By the lowering of 0, the lower end of the side plate 103 comes into contact with the receiving plate 314 and pushes it down, whereby the pressing plate 307 tilts,
The pressing surface 311 connects the outer reinforcing piece 10 and the outer surface
It is configured to press toward zero. Further, the tilt angle of the pressing plate 307 is adjusted by screwing the adjuster bolt 309 forward and backward, so that the pressing force by the pressing surface 311 can be appropriately set.

【００４２】以下、上述した製造装置による紙製緩衝体
ａの製造について、図９〜図１６を参照して説明する。
図９〜図１４は上記製造装置の作動を工程順に示す説明
図で、各図中（ａ）は縦断正面図、（ｂ）は縦断側面図
を表す。また図１５〜図１６は、図９〜図１４の各工程
に対応するシート状基材ａ’の曲げ形成工程を示す平面
図で、図１５中の（ａ）は図９に、（ｂ）は図１０に、
（ｃ）は図１１に、図１６中の（ａ）は図１２に、
（ｂ）は図１３に、（ｃ）は図１４に夫々対応してい
る。Hereinafter, the manufacture of the paper buffer a by the above-described manufacturing apparatus will be described with reference to FIGS.
9 to 14 are explanatory views showing the operation of the manufacturing apparatus in the order of steps, in which (a) shows a vertical front view and (b) shows a vertical side view. FIGS. 15 and 16 are plan views showing the steps of forming the sheet-like base material a 'corresponding to the steps of FIGS. 9 to 14, wherein (a) in FIG. Is shown in FIG.
(C) in FIG. 11, (a) in FIG. 16 in FIG.
(B) corresponds to FIG. 13 and (c) corresponds to FIG.

【００４３】まず図９及び図１５（ａ）に示すように、
中型１００の支承面１０１に、図４に示す平面側を下に
して、シート状基材ａ’の底面部１を支承する。First, as shown in FIG. 9 and FIG.
The bottom surface portion 1 of the sheet-shaped base material a 'is supported on the bearing surface 101 of the middle mold 100 with the flat side shown in FIG.

【００４４】この状態で上型２００が下降すると、まず
ガイドピン２１２が、支承面１０１の周囲に突出した内
側補強片９を下方へ曲げ形成する（図１０及び図１５
（ｂ））。次に第一ガイド板２１１が、長辺側の内側面
部２と内側補強片９を中型１００の外側へ曲げ形成する
（図１１及び図１５（ｃ））。次に第二ガイド板２０２
が短辺側の内側面部３を曲げ形成する（図１２及び図１
６（ａ））。さらに、第一ガイド板２１１、第二ガイド
板２０２の下端部挟持面２１３、２１４が鍔部１０２に
当接する状態で、該挟持面２１３、２１４と鍔部１０２
とで上縁面部４，５を挟持し、各内側面部２，３及び内
側補強片９が曲げ形成されて内周壁ａ2 が形成され、且
つ上縁面部４，５が外側に曲げ形成されて上周壁ａ3が
形成される。またこの時、ガイド凸部３０５が、各外側
補強片１０を上方へ曲げ形成する（図１３及び図１６
（ｂ））。When the upper die 200 descends in this state, first, the guide pin 212 bends and forms the inner reinforcing piece 9 projecting around the bearing surface 101 (FIGS. 10 and 15).
(B)). Next, the first guide plate 211 bends the inner side surface portion 2 on the long side and the inner reinforcing piece 9 to the outside of the middle mold 100 (FIGS. 11 and 15C). Next, the second guide plate 202
Bends the inner surface 3 on the short side (see FIGS. 12 and 1).
6 (a)). Further, in a state where the lower end holding surfaces 213 and 214 of the first guide plate 211 and the second guide plate 202 are in contact with the flange 102, the holding surfaces 213 and 214 and the flange 102
The inner edge portions 4, 3 and the inner reinforcing piece 9 are bent to form an inner peripheral wall a2, and the upper edge portions 4, 5 are bent outward to form an upper portion. A peripheral wall a3 is formed. At this time, the guide convex portion 305 bends the outer reinforcing pieces 10 upward (FIGS. 13 and 16).
(B)).

【００４５】この状態からさらに可動盤２０１を下降さ
せ、スプリング３０３の弾性に抗して中型１００を囲み
枠３０１内に下降させると、囲み枠３０１が各外側面部
６，７を曲げ形成する。さらに押圧板３０７が傾動して
押圧面３１１が外側面部７と外側補強片１０を中型１０
０方向へ押圧し、両者７，１０の当接面に設けた接着部
を強固に接着させる（図１４及び図１６（ｃ））。When the movable plate 201 is further lowered from this state, and the middle mold 100 is lowered into the surrounding frame 301 against the elasticity of the spring 303, the surrounding frame 301 bends the outer surface portions 6, 7. Further, the pressing plate 307 is tilted so that the pressing surface 311 connects the outer surface portion 7 and the outer
It is pressed in the 0 direction to firmly bond the bonding portions provided on the contact surfaces of the two 7, 10 (FIGS. 14 and 16 (c)).

【００４６】以上の工程が終了すると、可動盤２０１が
上昇して上型２００が中型１００から離型し、組み立て
られた紙製緩衝体ａを取り出す工程に移るが、該離型時
に、ガイドピン２１２及び第一ガイド板２１３による付
勢力が働き、紙製緩衝体ａを中型１００上に残して迅速
に取り出せるようにする。When the above steps are completed, the movable platen 201 rises, the upper die 200 is released from the middle die 100, and the process moves to the step of taking out the assembled paper buffer a. The urging force by the 212 and the first guide plate 213 acts to leave the paper buffer a on the middle mold 100 so that it can be quickly taken out.

【００４７】このようにして組み立てた紙製緩衝体ａ
は、左右の下縁面部８を曲げ形成せず、内外の周壁ａ2
，ａ4 の間の空間部ａ6 がその全周にわたり下面側を
開放する未完成の状態であるが、該開放部分を有するこ
とから紙製緩衝体ａを上下にスタック可能として、多数
の紙製緩衝体ａをできる限り嵩張らない状態で保管でき
るようになる。従って、製作現場から使用現場までの運
搬及び保管にかかるコストを低減できる。しかも使用現
場においては、下縁面部８を下方に折り曲げ嵌合用凹所
ａ1 の外側端部に嵌合させれば、係合片１３と支承片１
２とが該下縁面部８を係止保持するので、接着手段や特
別な装置、治具等を用いることなく簡単な手作業で組み
立てを完了して、即時に使用することができる。The paper cushion a thus assembled
Does not bend and form the lower edge portions 8 on the left and right, and the inner and outer peripheral walls a2
, A4 is in an unfinished state in which the lower surface side is open over its entire circumference, but since it has this open portion, the paper buffer a can be stacked up and down, so that a large number of paper buffers are provided. The body a can be stored in a state that is as small as possible. Therefore, the cost for transportation and storage from the production site to the use site can be reduced. Further, at the use site, if the lower edge 8 is bent downward and fitted to the outer end of the fitting recess a1, the engaging piece 13 and the bearing
2 locks and holds the lower edge portion 8, so that the assembly can be completed by a simple manual operation without using an adhesive means, a special device, a jig, or the like, and can be used immediately.

【００４８】次に、図１７〜図１９に示す側部補強部材
ｂと底部補強部材ｃについて説明する。これら補強部材
ｂ，ｃは、梱包物品が重量物である場合等、必要に応じ
て、上記嵌合用凹所ａ1 内に装填して用いられる。Next, the side reinforcing member b and the bottom reinforcing member c shown in FIGS. 17 to 19 will be described. These reinforcing members b and c are used by being loaded into the fitting recesses a1 as necessary, for example, when the packaged article is heavy.

【００４９】側部補強部材ｂは、嵌合用凹所ａ1 内の左
右の底部に敷設する底片ｂ1 と、この底片ｂ1 の三辺に
設けた谷折り目ｂ2 に連設され、底片ｂ1 の三辺に沿っ
て立ち上がり内周壁ａ2 の内面に沿う側片ｂ3 と、各側
片ｂ3 の端部に設けた山折り目ｂ4 に連設され、外側に
曲げ形成されて上周壁ａ3 上面に重なる上片ｂ5 とから
なる。そうして、嵌合用凹所ａ1 内の左右両側に夫々装
填し、内周壁ａ2 、上周壁ａ3 を多層構造として、紙製
緩衝体ａの強度、耐久性、衝撃吸収性をさらに向上せし
めるものである。尚、上記底片ｂ1 には上述した位置決
め孔１４に連通するガイド孔ｂ6 が開穿され、図１９に
示す展開状態でシート状基材ａ’の底面部１と共に中型
１００の支承面１０１に載承することで、紙製緩衝体ａ
と共に曲げ形成することも可能である。The side reinforcing member b is connected to a bottom piece b1 laid on the left and right bottoms of the fitting recess a1 and a valley fold b2 provided on three sides of the bottom piece b1, and is connected to three sides of the bottom piece b1. A side piece b3 that rises along the inner surface of the inner peripheral wall a2 and an upper piece b5 that is connected to a mountain fold b4 provided at the end of each side piece b3 and that is bent outward and overlaps the upper surface of the upper peripheral wall a3. Consists of Then, the inner peripheral wall a2 and the upper peripheral wall a3 have a multi-layer structure to further improve the strength, durability, and shock absorption of the paper buffer body a. It is. A guide hole b6 communicating with the positioning hole 14 is formed in the bottom piece b1. The guide hole b6 is mounted on the support surface 101 of the middle mold 100 together with the bottom surface 1 of the sheet-like base material a 'in the unfolded state shown in FIG. By doing so, the paper buffer a
It is also possible to bend and form together.

【００５０】底部補強部材ｃは、上記底面部１より若干
小さい平面視略矩形状の底面部ｃ1と、その周囲四辺に
形成した山折り目ｃ2 に連設され、該山折り目ｃ2 から
外側に曲げ形成される側面部ｃ3 とからなり、嵌合用凹
所ａ1 の内底部に装填して嵌合用凹所ａ1 の底壁を多層
構造とし、且つ両底面部１とｃ1 の間に側面部ｃ3 の高
さ分の間隙を形成して、嵌合用凹所ａ1 内の強度、耐久
性、衝撃吸収性を極めて高いものとする。The bottom reinforcing member c is connected to a substantially rectangular bottom surface portion c1 slightly smaller than the bottom surface portion 1 and a crest c2 formed on four sides around the bottom c1, and is formed to be bent outward from the crest c2. The bottom wall of the fitting recess a1 is loaded into the inner bottom of the fitting recess a1 so that the bottom wall of the fitting recess a1 has a multilayer structure, and the height of the side portion c3 is between the bottom surfaces 1 and c1. A minute gap is formed to make the strength, durability and shock absorption in the fitting recess a1 extremely high.

【００５１】[0051]

【発明の効果】本願の請求項１に係る発明は以上説明し
たように、梱包物品の嵌合用凹所を備え、該凹所の周壁
を内外二重構造となし、且つその周壁が部分的に角筒形
状である紙製緩衝体を、１枚のシート状基材を折り曲げ
且つ要所を接着して組み立てることができた。従って、
少なくとも２枚のシート状基材（ブランク）を要する従
来の紙製緩衝体に比べ、紙製板材の使用量を少なくして
材料の有効利用を図ると共に、製作工程をできる限り簡
素なものとして容易且つ迅速に組み立ることができ、自
動化も容易なことから低コストで作製可能である。しか
も、内外二重壁構造であって且つ部分的に角筒形状をな
す周壁部を備えるので、内外側板からなる単なる二重壁
構造を呈する従来の紙製緩衝体に比べ、強度、耐久性、
耐久性、衝撃吸収性により優れた新規な紙製緩衝体を得
ることができた。As described above, the invention according to claim 1 of the present application is provided with a recess for fitting a packaged article, and the peripheral wall of the recess has a dual inner / outer structure, and the peripheral wall is partially formed. The rectangular cylinder-shaped paper buffer could be assembled by bending one sheet-like base material and bonding important parts. Therefore,
Compared to a conventional paper buffer that requires at least two sheet-shaped substrates (blanks), the amount of paper board material used is reduced and the material is effectively used, and the manufacturing process is made as simple as possible. In addition, since it can be assembled quickly and can be easily automated, it can be manufactured at low cost. In addition, since the inner and outer double wall structure and the peripheral wall portion having a partially rectangular tube shape are provided, compared with a conventional paper cushion having a simple double wall structure composed of the inner and outer plates, strength, durability,
A new paper cushion having excellent durability and shock absorption was obtained.

【００５２】また請求項１記載の紙製緩衝体によれば、
内側補強片、外側補強片、略コ形の上縁面部によって要
所が多層構造となり、上記角筒形状部分を備える事との
相乗作用によって強度、耐久性、衝撃吸収性がさらに向
上し、前述の効果をより実効あるものとし得る。According to the paper buffer of the first aspect ,
The inner reinforcement piece, the outer reinforcement piece, and the substantially U-shaped upper edge surface part form a multilayer structure at the key points, and the synergistic action with the provision of the rectangular tube-shaped part further improves the strength, durability, shock absorption, and Can be made more effective.

【００５３】さらに請求項１記載の紙製緩衝体によれ
ば、組み立て最終工程において曲げ形成した下縁面部
を、接着手段を用いることなく、係合片と支承片とで係
止保持して組み立てを完了することができる。従って、
製作現場においては左右の下縁面部を曲げ形成せず、内
外二重構造をなす嵌合用凹所の周壁下面側が開放する状
態、すなわち、該開放部分を有することから紙製緩衝体
を上下にスタック可能として、多数の紙製緩衝体をでき
る限り嵩張らない状態で保管できるようにして、製作現
場から使用現場までの運搬及び保管にかかるコストを低
減できる。しかも使用現場においては、下縁面部を下方
に折り曲げ嵌合用凹所の外側端部に嵌合させれば、係合
片と支承片とが該下縁面部を係止保持するので、接着手
段や特別な装置、治具等を用いることなく簡単な手作業
で組み立てを完了して、即時に使用することができる。
さらに、支承片によって嵌合用凹所が部分的に多層構造
となり、上述した内側補強片、外側補強片、略コ形の上
縁面部、角筒形状部分を備える事と相俟って、紙製緩衝
体の強度、耐久性、衝撃吸収性のさらなる向上が期待で
きる等、多くの効果を奏する。 Further , according to the paper buffer of the first aspect, the lower edge surface portion bent and formed in the final assembly step is assembled and held by the engagement piece and the support piece without using the bonding means. Can be completed. Therefore,
At the production site, the lower edges of the left and right edges are not bent, and the lower surface side of the peripheral wall of the fitting recess forming the inner / outer double structure is open, that is, the paper buffer is stacked up and down because of the open portion. As much as possible, a large number of paper buffers can be stored in as small a volume as possible, so that the cost of transport and storage from the production site to the use site can be reduced. Moreover, at the site of use, if the lower edge is bent downward and fitted to the outer end of the fitting recess, the engagement piece and the bearing piece lock and hold the lower edge, so that the bonding means and The assembly can be completed by a simple manual operation without using any special device, jig or the like, and can be used immediately.
Further, the fitting recess is partially multilayered by the support piece, and the inner reinforcing piece, the outer reinforcing piece, the substantially U-shaped upper edge surface portion, and the rectangular tube-shaped portion are combined with the above-described paper-made. There are many effects such as further improvement in the strength, durability and shock absorption of the shock absorber.

【００５４】そして、上述した紙製緩衝体の製造装置と
して、請求項２記載の製造装置を用いることで、夫々の
内側面部と内側補強片を適時に曲げ形成した後、各上縁
面部を略水平に保持しながら、夫々の外側面部と外側補
強片を適時に曲げ形成して、上記の如く嵌合用凹所を有
し、その周壁が内外二重構造であって且つ該周壁の所要
箇所に角筒形状部分を形成可能な紙製緩衝体を、迅速且
つ容易に製造することができる。By using the manufacturing apparatus according to the second aspect of the present invention as the above-described apparatus for manufacturing a paper cushion, each inner side surface portion and the inner reinforcing piece are bent and formed at appropriate times, and then each upper edge surface portion is substantially bent. While holding horizontally, each outer side surface portion and the outer reinforcing piece are bent and formed in a timely manner to have a fitting recess as described above, and the peripheral wall has a dual inner / outer structure, and a required portion of the peripheral wall is provided. A paper buffer capable of forming a rectangular tube-shaped portion can be manufactured quickly and easily.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明に係る紙製緩衝体の実施の形態を示す斜
視図。FIG. 1 is a perspective view showing an embodiment of a paper buffer according to the present invention.

【図２】同縦断正面図。FIG. 2 is a vertical sectional front view of the same.

【図３】図２の（Ｘ）−（Ｘ）線に沿う断面図。FIG. 3 is a sectional view taken along lines (X)-(X) in FIG. 2;

【図４】図１に示す紙製緩衝体に係るシート状基材の平
面図。FIG. 4 is a plan view of a sheet-like base material according to the paper cushion shown in FIG. 1;

【図５】本発明に係る紙製緩衝体の製造装置の縦断正面
図。FIG. 5 is a vertical sectional front view of the apparatus for manufacturing a paper buffer according to the present invention.

【図６】同装置の縦断側面図。FIG. 6 is a vertical side view of the same device.

【図７】同装置の上型の底面図。FIG. 7 is a bottom view of the upper die of the same device.

【図８】同装置の中型と下型の平面図。FIG. 8 is a plan view of the middle and lower molds of the device.

【図９】シート状基材のセット工程を示す断面図。FIG. 9 is a cross-sectional view illustrating a step of setting a sheet-like substrate.

【図１０】ガイドピンによる内側補強片の曲げ工程を示
す断面図。FIG. 10 is a sectional view showing a step of bending an inner reinforcing piece by a guide pin.

【図１１】第一ガイド板による内側面部の曲げ工程を示
す断面図。FIG. 11 is a cross-sectional view showing a step of bending an inner surface portion by a first guide plate.

【図１２】第二ガイド板による内側面部の曲げ工程を示
す断面図。FIG. 12 is a cross-sectional view showing a step of bending an inner side surface portion by a second guide plate.

【図１３】ガイド凸部による外側補強片の曲げ工程を示
す断面図。FIG. 13 is a cross-sectional view showing a bending step of the outer reinforcing piece by the guide protrusion.

【図１４】囲み枠による外側面部の曲げ工程及び押圧面
による押圧工程を示す断面図。FIG. 14 is a cross-sectional view showing a bending process of the outer surface portion by the surrounding frame and a pressing process by the pressing surface.

【図１５】図９〜図１１までの工程に対応する平面説明
図。FIG. 15 is an explanatory plan view corresponding to the steps of FIGS. 9 to 11;

【図１６】図１２〜図１４までの工程に対応す平面説明
図。FIG. 16 is an explanatory plan view corresponding to the steps of FIGS. 12 to 14;

【図１７】補強部材を用いる例を示す斜視図。FIG. 17 is a perspective view showing an example using a reinforcing member.

【図１８】底部補強部材の展開平面図。FIG. 18 is a developed plan view of the bottom reinforcing member.

【図１９】側部補強部材の展開平面図。FIG. 19 is a developed plan view of a side reinforcing member.

【符号の説明】[Explanation of symbols]

ａ：紙製緩衝体 ａ1 ：嵌合用凹所 ａ2 ：内周壁 ａ3 ：上周壁 ａ4 ：外周壁 ａ5 ：角筒形状部 ａ’：シート状基材 １：底面部 ２，３：内側面部 ４，５：上縁面部 ６，７：外側面部 ８：下縁面部 ９：内側補強片 １０：外側補強片 １２：支承片 １３：係合片 １００：中型 １０１：支承面 １０２：鍔部 ２００：上型 ２０２：第一ガイド板 ２１１：第二ガイド板 ２１２：ガイドピン ２１３，２１４：挟持面 ３００：下型 ３０１：囲み枠 ３０５：ガイド凸部 ３０７：押圧板 ３１１：押圧面 a: paper buffer a1: recess for fitting a2: inner peripheral wall a3: upper peripheral wall a4: outer peripheral wall a5: rectangular tube-shaped part a ': sheet-like base material 1: bottom part 2, 3: inner side part 4, 5: Upper edge 6,7: Outer surface 8: Lower edge 9: Inside reinforcement piece 10: Outside reinforcement piece 12: Bearing piece 13: Engagement piece 100: Middle size 101: Support surface 102: Flange 200: Upper shape 202: First guide plate 211: Second guide plate 212: Guide pin 213, 214: Holding surface 300: Lower die 301: Enclosure frame 305: Guide projection 307: Press plate 311: Press surface

フロントページの続き (58)調査した分野(Int.Cl.⁷，ＤＢ名) B65D 81/113 B65D 77/26 Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 81/113 B65D 77/26

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 紙製板材からなる１枚のシート状基材を
折り曲げ且つ要所を接着して、上面側に梱包物品の嵌合
用凹所を備え且つその周壁は内外二重構造をなす大略直
方体形状に成形される紙製緩衝体であって、 上記シート状基材は、平面視略四角形状をなす底面部
と、該底面部の四辺から各々立ち上がる内側面部と、そ
れら各内側面部の端部から外方へ折れ曲がる上縁面部
と、それら各上縁面部の端部から下方へ折れ曲がる外側
面部と、相対する一対の外側面部の端部に連設され該端
部から内方へ折れ曲がる下縁面部とを有し、 上記底面部と各内側面部とで梱包物品の嵌合用凹所を形
成すると共に、該凹所の周囲を上記各外側面部で囲んで
内外二重壁構造となし、上記 下縁面部は、前記嵌合用凹所の外側両端に嵌合する
平面視略コ形に形成し、該下縁面部とこれに連なる外側
面部、上縁面部及び内側面部によって角筒状の壁部を形
成し、 さらに、相対する一対の内側面部の左右両側に、内側へ
折れ曲がり隣合う内側面部と重なり合う内側補強片を設
けると共に、相対する一対の外側面部の左右両側に、内
側へ折れ曲がり隣合う外側面部と重なり合う外側補強片
を設け、且つ平行に位置する一対の上縁面部を、嵌合用
凹所の外側両端に嵌合する平面視略コ形に形成し、 また、相対する一対の内側面部の左右両側に、上記嵌合
用凹所の外側に嵌合した下縁面部の下面に係合する係合
片を突設すると共に、上記下縁面部には、下方へ折れ曲
がり内側面部の外面に当接する支承片を設けた ことを特
徴とする紙製緩衝体。1. A sheet-like base material made of a paper board material is bent and bonded at important points, and a concave portion for fitting a packaged article is provided on an upper surface side, and a peripheral wall thereof has an inner / outer double structure. A paper cushion formed into a rectangular parallelepiped shape, wherein the sheet-shaped base material has a bottom portion having a substantially square shape in a plan view, an inner surface portion rising from each of four sides of the bottom portion, and an end of each of the inner surface portions. The upper edge surface portion bent outward from the portion, the outer surface portion bent downward from the end of each upper edge surface portion, and the lower edge continuously connected to the ends of a pair of opposed outer surface portions and bent inward from the ends. and a surface portion, to form a fitting recess packaging articles between said bottom and the inner side surface portion, surrounding the respective outer face by enclosing inner and outer double-wall structure and without the recess, the lower The edge surface portion is formed in a substantially U shape in plan view to be fitted to both outer ends of the fitting recess. , Lower edge surface and the outer surface portion contiguous thereto, the rectangular tube-shaped wall portion formed by the upper edge surface and the inner surface portion, further, on the right and left sides of the pair of opposing inner side surface portion, the inner
An inner reinforcement piece that bends and overlaps the adjacent inner surface
And a pair of inner side surfaces
Outer reinforcement piece that bends to the side and overlaps the adjacent outer surface
And a pair of upper edge surfaces located in parallel
It is formed in a substantially U-shape in plan view to be fitted to both outer ends of the recess, and the above-mentioned fitting
Engaging with the lower surface of the lower edge part fitted outside the recess
A piece is projected, and the lower edge is bent downward.
A paper shock absorber comprising a support piece that is in contact with the outer surface of the inner side surface of the beam . 【請求項２】 紙製板材からなる１枚のシート状基材を
折り曲げ且つ要所を接着して、上面側に梱包物品の嵌合
用凹所を備え且つその周壁は内外二重構造をなす大略直
方体形状に成形される紙製緩衝体の製造装置であって、 上面をシート状基材の底面部の支承面とし、下端周縁に
シート状基材の上縁面部を挟持するための鍔部を突設し
た中型と、 前記支承面の周囲に突出したシート状基材の内側補強片
を下方へ曲げ形成する出没自在なガイドピンと、該内側
補強片の折り曲げに前後して該内側補強片を有 する内側
面部を中型の外側に曲げ形成する上下摺動可能な第一ガ
イド板と、前記内側補強片と内側面部の折り曲げ後に内
側補強片を備えない内側面部を中型の外側に曲げ形成す
る第二ガイド板とを有し、前記第一及び第二ガイド板の
下端部には上記鍔部と共にシート状基材の上縁面部を挟
持する挟持面を設けた上型と、 型合せした上型と中型の周囲に突出したシート状基材の
外側面部を上型の外面に沿って曲げ形成するための囲み
枠を備えた下型とからなり、 前記囲み枠内に上記中型を上下動可能に配すると共に、
該中型は弾発部材で上方へ付勢し、且つ囲み枠の上端に
は、上記外側面部の折り曲げに先立ち外側補強片を上方
へ曲げ形成するガイド凸部を設け、 さらに囲み枠内面と中型の間には、上記外側補強片とこ
れに重なる外側面部とを中型に向けて押圧する押圧面を
備えた押圧板を傾動可能に支持し、中型の下降に伴い該
押圧板が傾動し前記押圧面による押圧力が働くよう構成
した請求項１記載の紙製緩衝体の製造装置。 2. A sheet-like base material made of a paper board material.
Bend and glue important points, fit packaged goods on top side
With a recess for use, and the peripheral wall of the
An apparatus for manufacturing a paper cushion formed into a rectangular parallelepiped, wherein the upper surface is a bearing surface of a bottom portion of a sheet-like base material, and
A flange is provided to hold the upper edge of the sheet-shaped substrate.
Medium-sized and inner reinforcing pieces of a sheet-like base material protruding around the bearing surface
Guide pins that bend downward to form
Inside to have a inner reinforcing piece back and forth in the bent reinforcing piece
The first slidable up and down slidable part that bends the surface to the outside of the middle mold
After bending the inner plate, the inner reinforcing piece and the inner side surface portion.
Bend the inner surface without the side reinforcing piece to the outside of the medium size
A second guide plate, and the first and second guide plates
At the lower end, the upper edge of the sheet-shaped substrate is sandwiched together with the flange.
An upper die with a holding surface to hold, and a sheet-like base material protruding around the upper die and the middle die
Enclosure for forming the outer surface along the outer surface of the upper mold
It consists of a lower mold with a frame, and the middle mold is arranged in the surrounding frame so as to be vertically movable,
The medium size is urged upward by a resilient member, and at the upper end of the surrounding frame.
Raise the outer reinforcing piece upward before bending the outer surface
A guide projection is formed by bending the outer reinforcement piece between the inner surface of the surrounding frame and the middle mold.
The pressing surface that presses the outer surface part overlapping with
The press plate provided is tiltably supported, and the
A configuration in which the pressing plate tilts and the pressing force by the pressing surface acts.
An apparatus for manufacturing a paper buffer according to claim 1.