JPH0415732B2 - - Google Patents
Info
- Publication number
- JPH0415732B2 JPH0415732B2 JP25220084A JP25220084A JPH0415732B2 JP H0415732 B2 JPH0415732 B2 JP H0415732B2 JP 25220084 A JP25220084 A JP 25220084A JP 25220084 A JP25220084 A JP 25220084A JP H0415732 B2 JPH0415732 B2 JP H0415732B2
- Authority
- JP
- Japan
- Prior art keywords
- deck board
- legs
- pallet
- ribs
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 238000000071 blow moulding Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 229920001519 homopolymer Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 241000975357 Salangichthys microdon Species 0.000 description 1
- 101100345332 Schizosaccharomyces pombe (strain 972 / ATCC 24843) mfr1 gene Proteins 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- VXNZUUAINFGPBY-UHFFFAOYSA-N ethyl ethylene Natural products CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
- B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D24/00—Producing articles with hollow walls
- B29D24/001—Producing articles with hollow walls formed of hollow ridges or ribs, e.g. separate ridges; continuous corrugated structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7178—Pallets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pallets (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、フオークリフトやハンドリフトなど
の荷役作業用機械で使用する成樹脂製パレツトの
製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing plastic pallets for use in cargo handling machines such as forklifts and handlifts.
例えば、高密度ポリエチレン、ポリプロピレン
等の合成樹脂を材質とするパレツトは軽量で耐久
性にすぐれ、経済的に安価であることが知られて
いる。そして、パレツトは片面使用タイプと両面
使用可能タイプに分かれるが、いずれにせよ荷物
を載置するデツキボードとこれを支える脚とで構
成され、脚の周囲にはフオークを差込むべき空間
が確保されるものである。
For example, pallets made of synthetic resins such as high-density polyethylene and polypropylene are known to be lightweight, durable, and economically inexpensive. Pallets are divided into single-sided and double-sided types, but in either case, they consist of a deck board on which the cargo is placed and legs to support it, with space around the legs to insert a fork. It is something.
合成樹脂製パレツトではこのデツキボードと脚
とは一体的に成形する場合と、別々に成形して両
者を結合する場合とがあるが、前者は一定の強度
を有するものを得ようとすると、形状がかなり複
雑なものとなるのでブロー成形では不可能な場合
が多く、射出成形でも金形が複雑化し、コストの
かかるものとなつてしまう。一方、デツキボード
と脚とを別々に造りこれらを組合せる方法では、
通常結合にボルト、ナツトが用いられるが、その
頭部が突出しないように処理することなどで製作
に手数を要し、さらに、使用中にボルト、ナツト
が緩み取付けが不完全になるおそれがある。 In the case of synthetic resin pallets, the deck board and the legs are either molded integrally or molded separately and then joined together, but in the former case, if you try to obtain something with a certain level of strength, the shape will change. Since it is quite complex, blow molding is often not possible, and even injection molding results in a complicated mold and high cost. On the other hand, in the method of building the deck board and legs separately and combining them,
Bolts and nuts are usually used for connection, but manufacturing is time-consuming as the heads must be processed to prevent them from protruding.Furthermore, there is a risk that the bolts and nuts may loosen during use, resulting in incomplete installation. .
また、デツキボードに接着剤等で脚を接着する
方法や溶着する方法も考えられるが、結合部の接
合強度を充分確保するのが困難であるのと、多数
の脚を1個1個取付けていくのに時間と労力がか
かる。 Another option is to attach the legs to the deck board with adhesive or by welding them, but it is difficult to ensure sufficient joint strength at the joint, and it requires attaching a large number of legs one by one. It takes time and effort.
本発明の目的はかかる従来例の不都合を解消
し、剛性が高く軽量なパレツトを少ない工程及び
部材で製造できる合成樹脂製パレツトの製造方法
を提供することにある。 It is an object of the present invention to provide a method for manufacturing synthetic resin pallets that eliminates the disadvantages of the conventional method and can manufacture lightweight pallets with high rigidity using fewer steps and fewer members.
本発明は前記目的を達成するため、下面に結合
用の突出部を有する中空デツキボードと、柱体部
を並列させて上方へ突出した平板状の中空脚とを
それぞれブロー成形で別個に形成し、しかる後に
突出部と柱体部とを熱融着することでデツキボー
ドに脚を取付けることを要旨とするものである。
In order to achieve the above object, the present invention separately forms by blow molding a hollow deck board having a protrusion for coupling on the lower surface, and a hollow leg in the form of a flat plate that juxtaposes columnar parts and protrudes upward. The gist of this method is to attach the legs to the deck board by then heat-sealing the protrusion and the column body.
本発明によれば、デツキボードも脚も中空体な
ので軽量であり、該デツキボードと脚とは熱融着
により他の取付部材を用いずに簡単に結合でき、
しかも脚は1個1個柱体が独立したものではなく
数個が一体化された平板状のものなので一挙に取
付けができ、またしつかりと固定できる。
According to the present invention, since both the deck board and the legs are hollow bodies, they are lightweight, and the deck board and the legs can be easily connected by heat fusion without using other attachment members.
Furthermore, the legs are not individual pillars, but rather a flat plate with several pieces integrated, so they can be attached all at once and fixed securely.
以下、図面について本発明の実施例を詳細に説
明する。
Embodiments of the present invention will be described in detail below with reference to the drawings.
第1図は本発明方法で製造された合成樹脂製パ
レツトの斜視図、第2図は同上B矢視図、第3図
は同上A矢視図で、図中1はデツキボード、2は
脚、3はデツキボード1の下面に一体的に形成さ
れた突出部、4は平板状の脚2の上方へ突出した
柱体部で、これは適宜の間隔を存して複数個並列
させる。 Fig. 1 is a perspective view of a synthetic resin pallet manufactured by the method of the present invention, Fig. 2 is a view in the direction of the arrow B shown above, and Fig. 3 is a view in the direction of the arrow A of the above. In the figure, 1 is a deck board, 2 is a leg, Numeral 3 is a protrusion integrally formed on the lower surface of the deck board 1, and numeral 4 is a column protruding upward from the flat leg 2. A plurality of these are arranged in parallel at appropriate intervals.
まず、デツキボード1及び脚2を形成する材質
から説明すると、これはともにかつ別個にブロー
成形された中空体であり、大形ブロー成形が可能
なポリオレフイン樹脂、例えば高密度ポリエチレ
ン、ポリプロピレンまたは、これらの混合物が使
用される。 First, to explain the materials forming the deck board 1 and the legs 2, they are both hollow bodies that are blow-molded separately, and are made of polyolefin resin that can be blow-molded into large sizes, such as high-density polyethylene, polypropylene, or any of these. A mixture is used.
高密度ポリエチレンについてはMIが0.5〔g/
10min〕以下のホモポリマーまたは、ブテン−1
やヘキセン−1などのαオレフインとの共重合体
が使用される。 For high density polyethylene, MI is 0.5 [g/
10min] or less homopolymer or butene-1
copolymers with α-olefins such as hexene-1 and hexene-1 are used.
ポリプロピレンについては、MFR1〔g/
10min〕以下のエチレン・プロピレンブロツク共
重合体の使用が耐寒強度の面でのぞましい。また
は、ポリプロピレン(ホモポリマーを含む)に各
種のエラストマー(例えばEPM,EPDM,
EVA,EEAなど)や低密度ポリエチレンを配合
したものも使用される。また、必要に応じて各種
フイラー(例えばマイカ、タルク、ガラス繊維、
シラスバルーン炭カルなどの無機フイラーや木
粉、古紙など)を混合してもよい。なお、後述の
ようにデツキボード1と脚2の材質は熱融着する
関係上、同一材質であることが好ましいが、接合
を良好に行いうれば異材質とすることも可能であ
る。 For polypropylene, MFR1 [g/
10 min] or less, it is preferable to use an ethylene/propylene block copolymer in terms of cold resistance. Alternatively, various elastomers (such as EPM, EPDM, etc.) can be added to polypropylene (including homopolymers).
EVA, EEA, etc.) and low-density polyethylene are also used. In addition, various fillers (e.g. mica, talc, glass fiber,
Inorganic fillers such as whitebait balloon charcoal, wood flour, waste paper, etc.) may be mixed. As will be described later, it is preferable that the deck board 1 and the legs 2 are made of the same material because they are heat-sealed, but they may be made of different materials if they can be bonded well.
デツキボード1は上面が何の凹凸を持たない平
板であり、下面には一例として第10図に示すよ
うに、上面を接合面3aとした円錐台状の突出部
3が4隅とその中心とその中間というように適宜
間隔で一体的に形成される。また、同じくデツキ
ボード1の下面には第12図に示すように、成形
の際に裏面側より陥没させて形成した2面1組の
壁cからなり、その底部dはデツキボード1の上
面側の壁と融着させた凹溝からなる、長手に連続
したリブ5,6,7が格子状に設置され、これに
対し、その間で同様の構造のリブ8,9がデツキ
ボード1の中心から放射状に配設される。 The deck board 1 is a flat plate with no unevenness on the upper surface, and on the lower surface, as shown in FIG. They are integrally formed at appropriate intervals such as in the middle. Similarly, as shown in FIG. 12, the lower surface of the deck board 1 is made up of a set of two walls c that are depressed from the back side during molding, and the bottom d is a wall on the upper surface side of the deck board 1. Longitudinal continuous ribs 5, 6, and 7 consisting of concave grooves fused to the deck are installed in a lattice pattern, while ribs 8 and 9 of a similar structure are arranged radially from the center of the deck board 1 between them. will be established.
他の実施例としては、第11図に示すように前
記放射状のリブ8,9の代りに縦方向のリブ10
を加えたものとしてもよい。 In another embodiment, as shown in FIG.
It may be added.
これらリブ5〜10は接合面3aを形成するた
めの突出部3を貫通するか、またはその一部に懸
かるようにし、これによつてリブの連続性が保た
れ、また他の交叉するリブと強度上の連結がはか
られるようにしている。 These ribs 5 to 10 are arranged to pass through the protrusion 3 for forming the joint surface 3a, or to hang over a part of the protrusion 3, thereby maintaining the continuity of the ribs and also intersecting with other ribs. This ensures a strong connection.
このように多くのリブがパレツト内部に連続性
を保つて設置され、かつ、リブの端末が接合面3
aで連結されるので、パレツトの静置負荷および
リフトによる運搬時の負荷をいわゆる連続はりと
して受けることになる。 In this way, many ribs are installed inside the pallet while maintaining continuity, and the ends of the ribs are placed on the joint surface 3.
Since they are connected at point a, they receive the stationary load of the pallet and the load during transportation by lift as a so-called continuous beam.
このことは、パレツトの使用状態下で局所的に
発生する支点反力(例えばフオークの当り面周辺
や静置下での脚部とデツキボードの接合部周辺に
生ずる。)を、これらの連続リブによりスムーズ
にデツキボード全体に伝達し、応力を各所に分
散、平均化するのに役立ち、その結果デツキボー
ドに局所的変形を起こすことなく、従つて全体的
に変形を小さく抑えることができる。 This means that the fulcrum reaction force that occurs locally when the pallet is in use (for example, around the contact surface of the fork or around the joint between the legs and the deck board when the pallet is left still) is absorbed by these continuous ribs. It helps in smoothly transmitting stress to the entire deck board, dispersing and averaging stress to various parts, and as a result, local deformation of the deck board is not caused, and therefore deformation can be suppressed to a small level as a whole.
一方、脚2は第4図〜第9図に示すように、長
手方向に伸びる平板状の桁2aからなり、該桁2
aから上方に向けて柱体部4が一体に形成されそ
の上面が接合面4aとなる。 On the other hand, as shown in FIGS. 4 to 9, the leg 2 consists of a flat plate-shaped girder 2a extending in the longitudinal direction.
A columnar portion 4 is integrally formed upward from a, and its upper surface becomes a joint surface 4a.
この柱体部4は、積荷による負荷を圧縮荷重と
して受持つ部分でありこの場合、圧縮荷重e(第
5図中の矢印)は側壁4bを介して、桁2aまた
は接地面に伝わる。特にパレツトが地面に静置さ
れた場合、この壁面の耐圧縮座屈強度が搭載可能
荷重を支配する。座屈強度を向上させるのに肉厚
増加は有効ではあるが、重量増加を招き、余り好
ましくない。 This column body portion 4 is a portion that bears the load due to the cargo as a compressive load, and in this case, the compressive load e (arrow in FIG. 5) is transmitted to the girder 2a or the ground plane via the side wall 4b. In particular, when the pallet is placed on the ground, the compressive buckling strength of the wall surface controls the load that can be mounted. Although increasing the wall thickness is effective in improving the buckling strength, it causes an increase in weight, which is not very desirable.
また、側壁4bは荷重eの方向に平行、即ち直
立していることが耐座屈面でのぞまれるが、反
面、成形時の離型不良及びコーナー部分の薄肉化
を防止するためのテーパーθ(但し5゜以内)が必
要である。しかし、この角度θは荷重e負荷に際
し、曲げモメントを壁面に発生させ、座屈限界荷
重を大いに低下させるので、このような制約を解
消するため、柱体部4の内部にエムボスリブ11
を設置して2重壁構造とし、座屈強度を向上させ
た。 In addition, it is desirable for the side wall 4b to be parallel to the direction of the load e, that is, to stand upright, in terms of buckling resistance, but on the other hand, the taper θ ( However, within 5°) is required. However, this angle θ generates a bending moment on the wall surface when the load e is applied, and greatly reduces the buckling limit load. Therefore, in order to eliminate such restrictions, an embossing rib 11 is installed inside the column body 4.
A double wall structure was installed to improve buckling strength.
また、桁2aの接地面側に、長手方向に連続し
たリブ12を設け、さらに必要に応じてこの連続
リブ12を設置したのち、残つたスペースに補助
リブ13を併設することもある。 Furthermore, a rib 12 continuous in the longitudinal direction is provided on the ground surface side of the girder 2a, and if necessary, after the continuous rib 12 is installed, an auxiliary rib 13 may be provided in the remaining space.
一方、桁2aにはフオークの進入を容易にし、
フオークの出入りに伴う桁2aの損傷を軽減する
ため、面取り14を形成する。 On the other hand, girder 2a is made easier for forks to enter.
A chamfer 14 is formed to reduce damage to the girder 2a due to the fork coming in and going out.
次に製造方法を説明すると、このようなデツキ
ボード1と脚2とををブロー成形機で個別に成形
し、デツキボード1の突出部3と脚2の柱体部4
のそれぞれの接合面3a,4aを熱板溶接または
振動摩擦溶接、電磁誘導加熱等により熱融着させ
てデツキボード1に脚2を取付ける。ここで個別
とは別体として製造されるという意味であり、同
一の金型を使用し、異なるキヤビテイーで成形す
る場合と、全く異なる金型を用いる場合の両方を
含む。 Next, to explain the manufacturing method, the deck board 1 and the legs 2 are individually molded using a blow molding machine, and the protruding portion 3 of the deck board 1 and the column body portion 4 of the leg 2 are formed.
The legs 2 are attached to the deck board 1 by heat-sealing the joint surfaces 3a, 4a of each by hot plate welding, vibration friction welding, electromagnetic induction heating, or the like. Here, "separately" means to be manufactured separately, and includes both cases where the same mold is used and molded with different cavities, and cases where completely different molds are used.
柱体部4の“高さ”は、開口部b(第1図)を
形成するために一定のものが必要であるが、ブロ
ー比が桁2aの部分と異なるため、特にコーナー
部4cなどで薄肉化しやすい。このため、デツキ
ボード1側にも突出部3を設けてパレツトの高さ
及び開口部を確保しつつ、柱体部4の高さを抑え
るようにした。 The "height" of the column body 4 needs to be constant in order to form the opening b (Fig. 1), but since the blow ratio is different from that of the girder 2a, it is necessary to have a certain height, especially at the corner part 4c. Easy to make thin. For this reason, a protrusion 3 is also provided on the deck board 1 side to ensure the height and opening of the pallet while suppressing the height of the column body 4.
このように、突出部3は、溶接部分を限定、確
保すと同時に、柱体部4の高さが、不当に高くな
らないように調整する役目を有する。 In this manner, the protruding portion 3 has the role of limiting and securing the welded portion and at the same time adjusting the height of the column portion 4 so that it does not become unduly high.
このようにして、製作されたパレツトは、第1
図中開口部a及びbが確保され矢印A方向及びB
方向のいずれの方向からもフオークリフト(ハン
ドリフターも含む)を進入、荷扱することが可能
である(いわゆる四方差しタイプ)。 The pallet produced in this way is the first
Openings a and b in the figure are secured in the direction of arrow A and arrow B.
It is possible for forklifts (including hand lifters) to enter and handle cargo from any direction (so-called four-way type).
また、他の実施例として脚2を格子状に組み、
田の字に取付けることもできる。 In addition, as another embodiment, the legs 2 are assembled in a grid pattern,
It can also be installed in the shape of a field.
そして、デツキボード1の上面は平面なのでゴ
ミ等がたまりにくく洗浄が容易であり、衛生的な
ものとなる。 Since the upper surface of the deck board 1 is flat, it is difficult for dust to accumulate and is easy to clean, making it sanitary.
また、柱体部4の側壁4bが曲面で構成されて
いるので、フオークの当りを曲面上で横にそらせ
損傷を防ぐことができる。 Further, since the side wall 4b of the column body portion 4 is formed of a curved surface, the impact of the fork can be deflected laterally on the curved surface to prevent damage.
デツキボード1の裏面が第10図の場合には、
もしA方向からフオークが進入すれば、リブ5,
7,8,9がブリツジの役目をなし、リフト運搬
時のたわみを抑える。また、B方向からフオーク
が進入すれば、リブ6,8,9が同様な役目を果
たす。 If the back side of deck board 1 is as shown in Figure 10,
If the fork enters from direction A, rib 5,
7, 8, and 9 act as bridges to suppress deflection during lift transportation. Furthermore, if the fork enters from direction B, the ribs 6, 8, and 9 will perform the same role.
デツキボード1の裏面が第11図の場合には、
縦方向に重点的にリブが配置されていて、これに
対し脚2が図上では横方向に設置されるので、こ
れが補強材として働くため、横方向へのリブの設
置本数を減じても支障はない。 If the back side of deck board 1 is as shown in Figure 11,
The ribs are placed mainly in the vertical direction, whereas the leg 2 is installed in the horizontal direction in the diagram, so this acts as a reinforcing material, so even if you reduce the number of ribs installed in the horizontal direction, there will be no problem. There isn't.
また、脚2の桁2aに設けたリブ12は、パレ
ツトの曲げ(第5図の〓印のモメント)に対する
剛性向上に寄与し、パレツトが両側で支持された
ときや、フオークリフトで持ち上げられたときの
変形防止に有効である。特にリブ13を設けた場
合は主にフオークリフトの受圧面を強化するのに
役立つ。 In addition, the ribs 12 provided on the beams 2a of the legs 2 contribute to improving the rigidity of the pallet against bending (the moment marked with a cross in Figure 5), and when the pallet is supported on both sides or lifted by a forklift. It is effective in preventing deformation when In particular, when the ribs 13 are provided, they mainly serve to strengthen the pressure receiving surface of the forklift.
実例及び試験結果について述べると、石川島播
磨重工業製ブロー成形機IPB−200に当該デザイ
ンに基づく金型を取付、成形した。成形材料は、
フイリツプス法による高密度ポリエチレン〔ホモ
ポリマー、密度0.952以上、MI(高荷重法21.6Kg)
で5〕を使用し、200℃の成形温度にてデツキボ
ードと脚(3個)を成形後、両者を融着した。デ
ツキボードサイズは、1100×900mm、高さ150mmで
デツキボード重量10Kg、脚重量1.5Kg/個とした。 Regarding actual examples and test results, a mold based on the design was attached to a blow molding machine IPB-200 manufactured by Ishikawajima Harima Heavy Industries, and molding was carried out. The molding material is
High-density polyethylene made by the Phillips method [homopolymer, density 0.952 or more, MI (high load method 21.6 kg)
After molding the deck board and the legs (3 pieces) at a molding temperature of 200° C., the two were fused together. The deck board size was 1100 x 900 mm, height 150 mm, deck board weight was 10 kg, and leg weight was 1.5 kg/piece.
このパレツトにつき、JISZ0602に基づく曲げ
強度試験を行つたところ、1トン負荷で15mm、
1.5トン負荷で25mmの変形であり、積載荷重1ト
ン用パレツトのB種にランク付けられた。 When this pallet was subjected to a bending strength test based on JISZ0602, the strength was 15mm under a 1 ton load.
The deformation was 25 mm under a load of 1.5 tons, and it was ranked as a Class B pallet for a 1-ton load.
同じくJISZ0602に基づく圧縮試験を行つたと
ころ、4/3トン負荷/(1脚当り)で3mmあり、
積載荷重1トン用パレツトのA,B種基準(4mm
以内)をパスした。 When we also conducted a compression test based on JISZ0602, it was 3 mm at a 4/3 ton load/(per leg).
Class A and B standards for pallets with a carrying capacity of 1 ton (4 mm
(within)
同じくJISZ0602に基づく落下試験(1m高さ
よりコーナー部落下)を実施したが、パレツトの
対角線長さの寸法変化率は0%で、A,B種基準
±1.5%以下)をパスした。 A drop test (dropping at a corner from a height of 1 m) based on JIS Z0602 was also carried out, and the dimensional change rate of the diagonal length of the pallet was 0%, passing the A and B standards (±1.5% or less).
また、1トンの樹脂(25Kg紙袋、40袋)をの
せ、フオークリフターで運搬テストを行つたが、
フオーク昇降時の変形は、パレツトの末端で5mm
以内であり、実用上支障は認められなかつた。 In addition, we carried out a transportation test using a fork lifter carrying 1 ton of resin (25 kg paper bags, 40 bags).
The deformation when the fork goes up and down is 5mm at the end of the pallet.
within the limits, and no practical problems were observed.
以上述べたように本発明の合成樹脂製パレツト
の製造方法は、デツキボードと脚の接合は熱融着
によりボルト等他の部材を用いることなく簡単に
接合でき、しかも、比較的広い接合面が確保でき
るので、接合部の応力集中をさけることができる
ものである。
As described above, in the method for manufacturing synthetic resin pallets of the present invention, the deck board and the legs can be easily joined by heat fusion without using other members such as bolts, and a relatively wide joint surface is ensured. Therefore, stress concentration at the joint can be avoided.
さらに、デツキボードと脚は一体成形でなく、
別個の成形物として分離されたものであるので、
ブロー比の不均一に基づく肉厚分布の不均一を解
消し、デツキボードの裏面及び脚に連続したリブ
を任意の配置で設置でき、脚とデツキボードの肉
厚を要求性能に応じて任意に選べるという強度上
有利な対策を講じることができる。 Furthermore, the deck board and legs are not integrally molded,
Since it is separated as a separate molded product,
This eliminates the uneven wall thickness distribution caused by uneven blow ratios, allows continuous ribs to be placed on the back of the deck board and the legs in any desired arrangement, and allows the wall thickness of the legs and deck board to be selected according to the required performance. Measures that are advantageous in terms of strength can be taken.
第1図は本発明方法により製造された合成樹脂
製パレツトの斜視図、第2図は同上第1図のB矢
視図、第3図は第1図のA矢視図、第4図は脚の
斜視図、第5図は同上正面図、第6図は同上平面
図、第7図は同上底面図、第8図は第7図のX−
X線断面図、第9図は第7図のY−Y線断面図、
第10図はデツキボードの底面図、第11図は他
の実施例でのデツキボードの底面図、第12図は
リブを示す要部の断面図である。
1…デツキボード、2…脚、2a…桁、3…突
出部、3a…接合面、4…柱体部、4a…接合
面、4b…側壁、4c…コーナー部、5,6,
7,8,9,10,12,13…リブ、11…エ
ムボスリブ、14…面取り。
Fig. 1 is a perspective view of a synthetic resin pallet manufactured by the method of the present invention, Fig. 2 is a view taken in the direction of arrow B in Fig. 1, Fig. 3 is a view taken in the direction of arrow A in Fig. 1, and Fig. 4 is a view taken in the direction of arrow A in Fig. 1. A perspective view of the legs, FIG. 5 is a front view of the same as above, FIG. 6 is a plan view of the same as above, FIG. 7 is a bottom view of same as above, and FIG.
An X-ray cross-sectional view, Figure 9 is a Y-Y cross-sectional view of Figure 7,
FIG. 10 is a bottom view of the deck board, FIG. 11 is a bottom view of the deck board in another embodiment, and FIG. 12 is a sectional view of the main part showing the ribs. DESCRIPTION OF SYMBOLS 1...Deck board, 2...Legs, 2a...Girders, 3...Protrusions, 3a...Joint surfaces, 4...Column body parts, 4a...Joint surfaces, 4b...Side walls, 4c...Corner parts, 5, 6,
7, 8, 9, 10, 12, 13...rib, 11...embossed rib, 14...chamfer.
Claims (1)
ードと、柱体部を並列させて上方へ突出した平板
状の中空脚とをそれぞれブロー成形で別個に形成
し、しかる後に突出部と柱体部とを熱融着するこ
とでデツキボードに脚を取付けることを特徴とし
た合成樹脂製パレツトの製造方法。1. A hollow deck board having a protrusion for coupling on the lower surface and a flat hollow leg protruding upward with columnar parts arranged in parallel are formed separately by blow molding, and then the protrusion and the columnar part are bonded together. A method for manufacturing a synthetic resin pallet characterized by attaching legs to a deck board by heat-sealing the legs.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59252200A JPS61130031A (en) | 1984-11-28 | 1984-11-28 | Manufacture of synthetic resin pallet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59252200A JPS61130031A (en) | 1984-11-28 | 1984-11-28 | Manufacture of synthetic resin pallet |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61130031A JPS61130031A (en) | 1986-06-17 |
JPH0415732B2 true JPH0415732B2 (en) | 1992-03-18 |
Family
ID=17233890
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59252200A Granted JPS61130031A (en) | 1984-11-28 | 1984-11-28 | Manufacture of synthetic resin pallet |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61130031A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5470641A (en) * | 1992-12-18 | 1995-11-28 | Shuert; Lyle H. | Panel structure |
CA2215601C (en) * | 1995-04-24 | 2004-03-30 | Lyle H. Shuert | Pallet with plastic legs |
US6524426B1 (en) * | 1999-06-15 | 2003-02-25 | Edison Welding Institute | Plastic lumber pallets |
ES2251354T5 (en) * | 2000-05-15 | 2010-04-05 | Daviplast - Servicos De Consultoria, Sociedade Unipessoal Lda. | PALLET WITH PLASTIC PLATFORM. |
SE524498C2 (en) * | 2002-09-18 | 2004-08-17 | Inter Ikea Systems Bv | Load bar and system for forming loading units |
DE102008009327A1 (en) * | 2008-02-15 | 2009-08-27 | Protechna S.A. | Transport and storage container for liquids |
JP6040586B2 (en) * | 2012-06-22 | 2016-12-07 | キョーラク株式会社 | palette |
CN103508031B (en) * | 2012-06-22 | 2015-11-18 | 日本通运株式会社 | Goods pallet for conveying device |
JP6056282B2 (en) * | 2012-08-31 | 2017-01-11 | キョーラク株式会社 | Pallet and method for manufacturing pallet |
JP6117572B2 (en) * | 2013-03-04 | 2017-04-19 | 三甲株式会社 | Box pallet |
CN110979904A (en) * | 2019-11-07 | 2020-04-10 | 湖南工业大学 | Convenient dismantlement formula tray |
-
1984
- 1984-11-28 JP JP59252200A patent/JPS61130031A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS61130031A (en) | 1986-06-17 |
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