KR0164232B1 - Synthetic resin grommet of pallet - Google Patents

Synthetic resin grommet of pallet Download PDF

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Publication number
KR0164232B1
KR0164232B1 KR1019930006616A KR930006616A KR0164232B1 KR 0164232 B1 KR0164232 B1 KR 0164232B1 KR 1019930006616 A KR1019930006616 A KR 1019930006616A KR 930006616 A KR930006616 A KR 930006616A KR 0164232 B1 KR0164232 B1 KR 0164232B1
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KR
South Korea
Prior art keywords
grommet
press
pallet
hole
diameter portion
Prior art date
Application number
KR1019930006616A
Other languages
Korean (ko)
Other versions
KR940002138A (en
Inventor
마사히로 사메지마
Original Assignee
마쯔무라 아쯔시
가부시키가이샤 메이지고무가세이
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Publication of KR940002138A publication Critical patent/KR940002138A/en
Application granted granted Critical
Publication of KR0164232B1 publication Critical patent/KR0164232B1/en

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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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D19/38—Details or accessories
    • 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
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D19/0004—Rigid pallets without side walls
    • B65D19/0006—Rigid pallets without side walls the load supporting surface being made of a single element
    • B65D19/0008—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface
    • B65D19/001—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface the base surface being made of a single element
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5324—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially annular, i.e. of finite length
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • 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
    • B29L2031/737—Articles provided with holes, e.g. grids, sieves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00014—Materials for the load supporting surface
    • B65D2519/00034—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00049—Materials for the base surface
    • B65D2519/00069—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00736—Details
    • B65D2519/00825—Finishing of the external surfaces
    • B65D2519/0083—Anti-slip means
    • B65D2519/0084—Separated elements, e.g. including in-moulded elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pallets (AREA)
  • Dowels (AREA)

Abstract

본발명은 작은 압압력으로 용이하게 압입할 수 있는 동시에, 발거력이 큰 합성수지제 팰릿용 그로메트를 제공하고자 하는 것이다.The present invention is to provide a grommet for a synthetic resin pallet that can be easily indented at a small pressing pressure and has a large holding force.

팰릿에 삽입되는 몸통부의 양단부 원주면에 플랜지부를 설치하고, 상기 몸통부에는 양단면에 관통하는 관통공을 형성하여 이루어진 그로메트에 있어서, 상기 관통공은 대경부와 소경부로 이루어지고, 대경부와 소경부는 단부를 통해 연속된 것을 특징으로 한다.In the grommet formed by installing a flange on the circumferential surface of the both ends of the body portion inserted into the pallet, the through portion penetrating through the both ends surface, the through hole is made of a large diameter portion and a small diameter portion, And the small diameter portion is continuous through the end.

Description

합성수지제 팰릿용 그로메트Grommet for plastic pallet

제1도는 본 발명에 의한 그로메트의 우측부분을 단면현상으로 나타낸 측면도.1 is a side view showing the right side of the grommet according to the present invention in cross-section.

제2도는 제1도의 단면에 대한 사시도.2 is a perspective view of the cross section of FIG.

제3도는 압입시험에 있어서의 종래품에 대한 압입방법을 나타낸 설명도.3 is an explanatory diagram showing a press-fit method for a conventional product in the press-fit test.

제4도는 압입시험에 있어서의 실시예의 압입방법을 나타낸 설명도.4 is an explanatory diagram showing the indentation method of the embodiment in the indentation test.

제5도는 발거(拔去)시험에 있어서의 종래품의 발거방법을 나타낸 설명도.5 is an explanatory diagram showing a method of extracting a conventional product in an extraction test.

제6도는 발거시험에 있어서 실시예의 발거방법을 나타낸 설명도.6 is an explanatory diagram showing a method of extracting the embodiment in the extraction test.

제7도는 그로메트를 부착한 팰릿의 설명용 사시도.7 is an explanatory perspective view of a pallet to which grommet is attached.

제8도는 제7도에 있어서의 일부분에 대한 확대 단면도.FIG. 8 is an enlarged sectional view of a portion in FIG. 7. FIG.

제9도는 종래의 그로메트의 압입방법을 나타낸 설명을 휘한 단면도.9 is a cross-sectional view showing a conventional Grommet indentation method.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

40 : 그로메트 41 : 몸통부40: Grommet 41: the body

43 : 외부 플랜지부 45 : 내부 플랜지부43: outer flange portion 45: inner flange portion

47 : 관통공 49 : 대경부47: through hole 49: large diameter part

50 : 소경부 51 : 단부50: small diameter portion 51: the end

본 발명은 각종 적하물을 운반 및 보관할 때 사용하는 포크리프트(forklift)용 팰릿에 부착하는 미끄럼 방지재에 관한 것이며, 특히 삽입해서 사용되는 합성수지제 팰릿(pallet)용 그로메트(grommet)에 관한 것이다.BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an anti-skid material attached to a forklift pallet used for transporting and storing various cargoes, and more particularly to a grommet for a pallet made of synthetic resin used for insertion. .

최근에, 적하물의 운반 및 보관시에 사용되는 팰릿에는 목제 팰릿에 비해 내구성 및 위생상 등에 있어서 뛰어난 합성수지제 팰릿이 다수 사용되고 있지만 합성수지제 팰릿은 미끄러지기 쉽다고 하는 문제가 있다. 미끄러지기 쉬운 것은 합성수지제 팰릿의 장점인 동시에 단점이기도 하다. 그래서, 종래 이런 단점인 미끄럼을 방지하기 위해 합성수지제 팰릿의 표면에 마찰계수가 큰 미끄럼 방지제를 부착하고 있다. 미끄럼 방지제로서는 열가소성 수지 또는 합성고무 등의 테이프 또는 그로메트가 사용된다.In recent years, many pallets made of synthetic resin which are superior in durability and hygiene, etc. are used in pallets used for transporting and storing cargo, but synthetic pallets have a problem of being slippery. Sliding is an advantage as well as a disadvantage of synthetic pallets. Thus, in order to prevent slippage, which is a disadvantage in the related art, a slippering agent having a large friction coefficient is attached to a surface of a synthetic resin pallet. As the anti-slip agent, a tape or grommet such as thermoplastic resin or synthetic rubber is used.

제7도는 그로메트를 부착한 합성수지제 팰릿의 일례를 나타낸 설명을 위한 사시도이고, 제8도는 일부 확대 단면도이며, 제9도는 그로메트의 압입방법을 나타낸 설명을 위한 단면도이다. 제7도에 나타낸 합성수지제 팰릿(10)은 상부 데크보드(deck board)(11)과 하부 데크보드(13)을 네구석과 그 중간 및 중심부에 각기 설치한 지주(15),(17) 및 (19)로 연결하고, 상기 지주 및 상하 데크보드로 둘러싸인 틈새를 포크삽입공(20)으로 한 4방면 삽입 팰릿이다. 팰릿(10)의 표면에는 그로메트(21)이 적절한 위치에 부착되어 있다. 그로메트(21)은 팰릿에 파묻히는 몸통부(23)의 상하 양단부에 각기 플랜지부(25),(27)를 설치하고, 몸통부(23)에는 양단으로 관통하는 관통공(29)가 천공되어 있다. 상기 플랜지부(27)은 상기 관통공(29)에의 삽입이 용이하도록 플랜지부(25) 보다도 약간 소경으로 하고, 표면이 몸통부(23)의 단면으로 부터 연속한 아르면으로 되어 있다. 그리고 상기 그로메트(21)은 미리 팰릿(10)에 성형된 그로메트 부착공(30)에 해머로 때려 넣거나 압입핀을 갖는 그로메트 압입장치에 의해 압입된다. 압입핀(31)은 그로메트(21)의 몸통부(23)의 단면을 압압하는 압압부(33)에 그로메트(21)의 관통공(29)에 삽입하는 삽입부(35)를 돌출시켜 설치해서 이루어진다. 그리고, 그로메트 부착공(30)에 압입할 때는 상기 삽입부(35)를 그로메트(21)의 관통공(29)에 삽입함으로써 유지하고, 소경의 플랜지부(27)측에서 팰릿의 그로메트 부착공(30)에 삽입하고, 상면을 압압부(33)에 의해 압압함으로써 압입한다. 압입후는 플랜지부(25) 및 플랜지부(27)이 걸리는 것에 의해 빠짐을 방지하게 되고, 표면측의 플랜지부(25)가 팰릿 표면에서 약간 돌출하는 것에 의해 마찰부재로서 역할을 하도록 구성되어 있다.FIG. 7 is a perspective view for explaining an example of a pallet made of synthetic resin with grommet, FIG. 8 is a partially enlarged cross-sectional view, and FIG. 9 is a cross-sectional view for explaining a method of pressing the grommet. The synthetic resin pallet 10 shown in FIG. 7 includes pillars 15, 17 having upper deck boards 11 and lower deck boards 13 installed at four corners, in the middle and in the center thereof, respectively. It is connected to (19), and is a four-sided insertion pallet which used the fork insertion hole 20 for the gap surrounded by the said support | pillar and the upper and lower deck boards. The grommet 21 is attached to the surface of the pallet 10 in an appropriate position. The grommet 21 is provided with flanges 25 and 27 respectively at upper and lower ends of the trunk portion 23 buried in the pallet, and through holes 29 penetrating at both ends are drilled in the trunk portion 23. It is. The flange portion 27 has a slightly smaller diameter than the flange portion 25 so that the flange portion 27 can be easily inserted into the through hole 29, and the surface has a continuous ar surface from the end face of the trunk portion 23. As shown in FIG. In addition, the grommet 21 is hammered into the grommet attachment hole 30 formed in the pallet 10 in advance or press-fitted by a grommet indentation apparatus having a indentation pin. The press-fit pin 31 protrudes the insertion part 35 inserted into the through-hole 29 of the grommet 21 to the press part 33 which presses the cross section of the trunk | drum 23 of the grommet 21, It is done by installation. And when press-fitting into the grommet attachment hole 30, it hold | maintains by inserting the said insertion part 35 in the through-hole 29 of the grommet 21, and the pallet grommet on the flange part 27 side of a small diameter It inserts into the attachment hole 30, and press-fits by pressing the upper surface by the press part 33. After the press-fitting, the flange portion 25 and the flange portion 27 are prevented from being pulled out, and the flange portion 25 on the surface side is configured to serve as a friction member by slightly protruding from the pallet surface. .

그러나, 압입장치에 의해 압입하는 방법에는 다음과 같은 문제가 있었다. 즉, 압입할 때 그러메트(21)를 유지하기 위해 그로메트(21)에는 압입핀(31)을 삽입하는 관통공(29)가 천공되어 있지만, 상기 관통공(29)에는 삽입부(35)가 삽입되므로 압입시에 플랜지부(27) 측의 변형량이 적어진다. 이 때문에 압입할 때 커다란 압압력이 필요했었다. 또 압입할 때는 그러메트(21)의 단면을 압압하기 위해 몸통부(23)이 압축되어 부풀게 되어 더욱 커다란 압압력을 필요로 했다.However, the method of press-fitting with the press-fitting device has the following problem. That is, although the through-hole 29 for inserting the press-fit pin 31 is drilled in the grommet 21 to maintain the grommet 21 when press-fitting, the insertion part 35 is provided in the through-hole 29. Since is inserted, the amount of deformation on the flange portion 27 side at the time of press fitting becomes small. This required a large pressing force when indenting. Moreover, when press-fitting, in order to pressurize the cross section of the grommet 21, the trunk | drum 23 was compressed and it swelled and needed a larger press force.

플랜지부(27)을 팰릿의 부착공(30)의 단면에 걸기 위해서는, 플랜지부(27)은 그로메트 부착공(30)에 삽입할 때 몸통부(23)측으로 꺽여진 상태로 되므로 선단부를 일단 충분히 돌출시켜 플랜지(27)를 노출시키지 않으면 안된다. 이를 위해서도 커다란 압압력이 필요하다. 한편 그로메트(21)의 발거력(拔去力)은 플랜지(27)의 걸리는 힘에 의하지만, 플랜지(27)측의 단면을 누르면 압입시와는 반대로 몸통부(23)이 관통부(29)내에 삽입되므로 걸리는 힘이 약해져서 발거력은 작어진다. 플랜지(27)을 크게 하면 발거력은 커지지만, 그만큼 압입이 곤란해진다. 또, 관통공(29)를 작게하면 발거력은 커지지만, 압입핀(31)이 가늘게 되어 파손되기 쉽다고 하는 문제가 있다.In order to hook the flange portion 27 to the end face of the pallet attachment hole 30, the flange portion 27 is bent toward the trunk portion 23 side when the flange portion 27 is inserted into the grommet attachment hole 30. It is necessary to protrude sufficiently to expose the flange 27. This also requires a large pressing force. On the other hand, the gripping force of the grommet 21 depends on the force of the flange 27, but when the end face of the flange 27 is pressed, the trunk portion 23 is reversed from the press-fitting portion. ), The force applied is weakened, and the extraction force becomes small. When the flange 27 is enlarged, the extraction force increases, but the press-fitting becomes difficult. In addition, when the through-hole 29 is made small, the extraction force increases, but there is a problem that the press-fit pin 31 becomes thin and easily breaks.

본 발명은 이러한 현황을 감안하여 이루어진 것으로서, 작은 압압력으로 용이하게 압입할 수 있는 동시에, 발거력이 큰 합성수지제 팰릿용 그로메트를 제공하고자 하는 것이다.SUMMARY OF THE INVENTION The present invention has been made in view of the present situation, and an object of the present invention is to provide a grommet for pellets made of synthetic resin that can be easily press-fitted with a small pressing pressure and has a high extraction force.

본 발명은 상기 목적을 달성하기 위해 다음과 같은 구성으로 되어 있다. 즉, 팰릿에 삽입되는 몸통부의 양단부 원주면에 플랜지부를 설치하고, 상기 몸통부에는 양단면을 관통하는 관통공을 설치해서 이루어진 그로메트에 있어서, 상기 관통공은 대경부와 소경부로 이루어지며, 대경부와 소경부는 단부를 통해 연속시킨 것을 특징으로 한다.The present invention has the following configuration to achieve the above object. That is, in the grommet formed by installing the flanges on the circumferential surface of both ends of the body portion to be inserted into the pallet, and through holes penetrating both end surfaces on the body portion, the through hole is made of a large diameter portion and a small diameter portion, The large diameter portion and the small diameter portion are characterized in that the continuous through the end.

압입핀의 선단면이 관통공내의 단부에 접하여 압압하므로 그로메트에 대해서는 압압력이 외측에 작용하는 일이 없고 오히려 축심방향으로 작용하도록 작용한다. 따라서 압입핀은 그로메트의 몸통부를 압축하는 일 없이 낮은 압입력으로 용이하게 압입할 수 있다.Since the front end face of the press-fit pin is pressed against the end in the through hole, the press force does not act on the outside of the grommet, but rather acts in the axial direction. Therefore, the press-fit pin can be easily pushed in at a low press force without compressing the trunk portion of the grommet.

실시예Example

본 발명은 실시예에 의거하여 상세히 설명한다. 제1도는 본 발명에 의한 합성수지제 팰릿용 그로메트의 우측부분을 단면 형상으로 도시한 측면도이고, 제 2도는 설명을 위한 단면사시도 이다. 그로메트(40)의 외형 및 크기는 종래의 그로메트와 같으며, 몸통부(41)의 한쪽단부에 플랜지(43)을 설치하고 타단부에 플랜지(45)를 설치해서 이루어지고, 플랜지(45)는 팰릿의 그로메트 부착공으로의 삽입을 용이하게 하기 위해 플랜지(43) 보다도 약간 작으며, 표면은 몸통부(41)의 단면으로부터 연속된 아르면으로 되어 있다. 본 발명의 특징은 관통공내에 단부를 설치한 점에 있다. 즉, 관통공(47)은 동축의 대경부(49)와 소경부(50)로 이루어지며, 상기 대경부(49)와 소경부(50)사이에는 단부(51)가 형성되어 있다. 상기 대경부(49)는 플랜지(43)측에 천공되어 있고, 그 직경 및 깊이치수는 각기 소경부(50)의 대략 2배의 크기로 형성되어 있다.The present invention will be described in detail based on the examples. 1 is a side view showing the right side of the grommette for synthetic resin pellets according to the present invention in a cross-sectional shape, and FIG. 2 is a cross-sectional perspective view for explanation. The appearance and size of the grommet 40 are the same as those of the conventional grommet, and are formed by installing the flange 43 on one end of the trunk portion 41 and the flange 45 on the other end, and the flange 45. ) Is slightly smaller than the flange 43 in order to facilitate the insertion of the pallet into the grommet attachment hole, and the surface has an ar surface continuous from the cross section of the trunk portion 41. A feature of the present invention lies in that an end portion is provided in the through hole. That is, the through hole 47 is composed of a coaxial large diameter portion 49 and a small diameter portion 50, and an end 51 is formed between the large diameter portion 49 and the small diameter portion 50. The large diameter portion 49 is perforated on the flange 43 side, and its diameter and depth dimension are each formed approximately twice the size of the small diameter portion 50.

다음에, 그로메트(40)의 부착방법에 대해 설명한다. 본 발명에 의한 그로메트(40)은 관통공(47)내에 단부(51)를 설치했으므로 팰릿의 그로메트 부착고에 압입할 때는 대경부(49)에 압입핀을 삽입하여 선단면을 단부(51)에 당접시켜, 압입핀의 선단면으로 누르거나 선단면과 함께 압입핀의 압압부에 의해 누르면 낮은 압입력으로 압입할 수 있다. 즉, 본 발명에 의하면 최소한 단부(51)을 압입핀의 선단면에 의해 누르기 때문에 그로메트(40)는 압축되는 일없이 삽입되게 된다. 더구나, 선단부에는 소경부(50)가 천공되어 있으므로 그로메트 부착공에 삽입할 때 전체가 축경(縮經)되는 것과, 아울러서 더욱 삽입이 용이해진다. 종래에는, 몸통부(41)의 상단면을 누르게 되므로 몸통부(41)가 압축되어 부푸르는 압압력이 외측으로 분산하게 되지만 본 발명에서는 압압력이 분산되는 일이 없고 오히려 축심방향으로 집중시키게 되므로 작은 압입력으로 용이하게 압입할 수 있는 것이다.Next, the attaching method of the grommet 40 is demonstrated. In the grommet 40 according to the present invention, since the end 51 is provided in the through hole 47, the press-fit pin is inserted into the large diameter portion 49 when the end portion 51 is inserted into the grommet attachment of the pallet. ) By pressing against the tip end face of the press-fit pin or by the press part of the press-fit pin together with the tip end face. That is, according to the present invention, at least the end 51 is pressed by the tip end surface of the press-fit pin so that the grommet 40 is inserted without being compressed. Moreover, since the small diameter part 50 is perforated by the front end part, when the whole diameter is inserted into a grommet attachment hole, the whole shaft diameter becomes easy, and also insertion becomes easy. Conventionally, since the upper portion of the body portion 41 is pressed, the body portion 41 is compressed so that the pusher pressure is distributed outward, but in the present invention, the pressure force is not dispersed but rather concentrated in the axial direction. Therefore, it can be easily pressed in with a small pressing.

이어서, 실시예와 종래품과의 압입력 및 발거력을 비교한 시험결과에 대해 나타낸다. 그로메트의 형상은 다음과 같다. 몸통부(41)의 치수는 길이가 32mm이고 직경이 21mm인 원통체로 하고, 플랜지부(43)의 치수는 두께를 5mm로하고 직경을 30mm로 하며, 플랜지부(45)의 치수는 두께를 3.5mm로하고 직경을 26mm로 했다. 그리고, 관통공은 비교예에서는 직경 8mm로 하고, 실시예에서는 대경부(49)를 8.6mm, 소경부(50)를 4mm로 하고, 소경부(50)의 길이를 10mm로 했다. 한편, 상기 그로메트를 압입하는 팰릿의 그로메트 부착공은 몸통부(41)과 동일하게 직경을 21mm로 했다.Next, it shows about the test result which compared the pressing force and the extraction force of an Example and a conventional product. The shape of the grommet is as follows. The body portion 41 has a length of 32 mm and a diameter of 21 mm. The flange portion 43 has a thickness of 5 mm and a diameter of 30 mm. The flange portion 45 has a thickness of 3.5 mm. The diameter was 26 mm. In the comparative example, the through hole was 8 mm in diameter, the large diameter part 49 was 8.6 mm, the small diameter part 50 was 4 mm, and the length of the small diameter part 50 was 10 mm. On the other hand, the grommet attachment hole of the pallet which presses the grommet was 21 mm in diameter similarly to the trunk | drum 41. As shown in FIG.

그리고 압입시험 및 발거시험은 다음과 같이 했다. 먼저 압입시험 방법은, 비교예는 종래의 압입방법과 같이 그로메트의 관통공에 압입핀(31)의 삽입부(35)를 삽입하고, 단면에 직경 17mm의 압압부(33)을 당접시켜 압압하여 삽입하는 방법(제3도 참조)으로 하고, 실시예는 압입핀(31)의 삽입부(35)의 선단면을 단부(51)에 당접시켜 압압하여 삽입하는 방법(제4도 참조)으로 했다. 또, 발거시험의 방법은, 삽입방향과는 반대측의 단면에 직경 15mm의 지그(jig)(37)에 의해 압압하는 방법(제5도 및 제6도 참조)으로 했다. 그리고, 시험조건은 텐시론 시험기를 사용하며, 로드셀은 500kgf로 하고, 압입 및 발거속도는 50mm/분으로 하여, 압입시의 그로메트에 비누물(1%)를 묻혔다. 상기에 의한 시험결과는 표 1에 나타낸 바와 같다.Indentation test and extraction test were as follows. First, in the indentation test method, as in the conventional indentation method, the insertion part 35 of the indentation pin 31 is inserted into the through hole of the grommet, and the pressing part 33 having a diameter of 17 mm is abutted on the end face. (See Fig. 3), and the embodiment is a method of pressing and inserting the tip end surface of the inserting portion 35 of the press-fit pin 31 into the end portion 51 and pressing it (see Fig. 4). did. In addition, the method of the extraction test was made to press by the jig 37 of diameter 15mm in the cross section on the opposite side to the insertion direction (refer FIG. 5 and FIG. 6). In addition, the test conditions were a tensilon tester, the load cell was 500kgf, the indentation and extraction speed was set to 50mm / min, soaked with soapy water (1%) in the grommet during the indentation. Test results according to the above are shown in Table 1.

상기 시험결과에서 명백하게 나타난 바와 같이, 실시예는 비교예에 비해 압입력은 평균적으로 종래의 약 40%정도로 감소하고, 발거력은 평균적으로 종래의 약 70%정도로 증대했다. 따라서, 실시예에서는 낮은 압입력으로 그로메트를 압입할 수 있으므로 압입장치의 소형화를 도모할 수 있는 동시에, 압입시에 그로메트를 손상시키는 일이 없다. 또 발거력이 증대한 것에 의해 포크리프트의 포크가 접해도 뜻하지 않게 탈락하는 일이 없다. 그리고, 본 발명에 의한 그로메트의 형상은 통형상체에 한정되는 것은 아니며, 단면이 타원형이나 다각형이라도 좋다.As is apparent from the above test results, in the Examples, the pressing force was reduced to about 40% of the conventional average, and the extraction force increased to about 70% of the conventional average compared with the comparative example. Therefore, in the embodiment, the grommet can be press-fitted with a low pressing force, so that the press-fitting apparatus can be miniaturized and the grommet is not damaged during the press-fitting. In addition, the forklift's fork does not accidentally fall off due to the increase in the pulling force. The shape of the grommet according to the present invention is not limited to the cylindrical body, and the cross section may be elliptical or polygonal.

본 발명의 그로메트는 관통공을 대경부와 소경부에 의해 형성하고, 대경부와 소경부는 단부를 통해 연속시켰으므로 낮은 압입력으로 용이하게 압입할 수 있는 동시에, 큰 발거력으로도 좀처럼 빠지지 않아 미끄럼 방지부재로서 큰 효과가 얻어진다.In the grommet of the present invention, the through hole is formed by the large diameter portion and the small diameter portion, and the large diameter portion and the small diameter portion are continuous through the end, so that they can be easily press-fitted with a low pressing force and hardly fall out even with a large pulling force. A large effect can be obtained as an anti-slip member.

Claims (1)

팰릿에 삽입되는 몸통부의 양단부 원주면에 플랜지부를 설치하고, 상기 몸통부에는 양단면에 관통하는 관통공을 형성하여 이루어진 그로메트에 있어서, 상기 관통공은 대경부와 소경부로 이루어지며, 대경부와 소경부는 단부를 통하여 연결된 것을 특징으로 하는 합성수지제 팰릿용 그로메트.In the grommet formed by installing a flange on the circumferential surface of both ends of the body portion to be inserted into the pallet, and the through-hole penetrating the both end surface on the body portion, the through hole is composed of a large diameter portion and a small diameter portion, large diameter portion Grommets for plastic pallets, characterized in that and the small diameter portion is connected through the end.
KR1019930006616A 1992-07-20 1993-04-20 Synthetic resin grommet of pallet KR0164232B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP92-214637 1992-07-20
JP4214637A JP2572700B2 (en) 1992-07-20 1992-07-20 Grommets for plastic pallets

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KR940002138A KR940002138A (en) 1994-02-16
KR0164232B1 true KR0164232B1 (en) 1998-12-01

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JP2013070949A (en) * 2011-09-29 2013-04-22 Key Tranding Co Ltd Method for fitting squeezer rubber
US10562666B2 (en) * 2018-05-31 2020-02-18 Chep Technology Pty Limited Repairable plastic pallet with grommets in the top deck and associated methods
US11111053B2 (en) 2018-11-13 2021-09-07 Chep Technology Pty Limited Stackable half-size reconfigurable pallet/dolly platform

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DE8310685U1 (en) * 1983-04-12 1983-07-28 Paul Craemer GmbH, 4836 Herzebrock Plastic pallet with rubber stopper
DE3725160C1 (en) * 1987-07-29 1989-03-02 Reinhold Dipl-Ing Klowski Flat pallet

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DE4324216C2 (en) 1995-08-10
DE4324216A1 (en) 1994-01-27

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