WO2003027513A1 - Means for fixing by interlocking and container fixed thereby - Google Patents

Means for fixing by interlocking and container fixed thereby Download PDF

Info

Publication number
WO2003027513A1
WO2003027513A1 PCT/EP2002/010619 EP0210619W WO03027513A1 WO 2003027513 A1 WO2003027513 A1 WO 2003027513A1 EP 0210619 W EP0210619 W EP 0210619W WO 03027513 A1 WO03027513 A1 WO 03027513A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
fixing
interlocking
container
aperture
Prior art date
Application number
PCT/EP2002/010619
Other languages
French (fr)
Inventor
François Cottet
Denis Menin
Original Assignee
Mark Iv Systemes Moteurs (Societe Anonyme)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mark Iv Systemes Moteurs (Societe Anonyme) filed Critical Mark Iv Systemes Moteurs (Societe Anonyme)
Publication of WO2003027513A1 publication Critical patent/WO2003027513A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/029Expansion reservoirs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00Friction-grip releasable fastenings
    • F16B2/20Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Insertion Pins And Rivets (AREA)
  • Closures For Containers (AREA)

Abstract

Means for fixing by interlocking, adapted to be fitted into an orifice or an aperture (2') in the form of a slot or oblong hole made in a wall (2), characterised in that it consists of a body (1) in the form of a ring or a link or of part of a ring or a link, produced from an at least slightly elastically deformable material and comprising, on two mutually facing ring or link portions (1' and 1'), sites for retention by interlocking (3, 3') which are intended to mesh under elastic stress in the region of the wall edges (2') defining the opposing ends of the aperture (2') in the form of a slot or oblong hole.

Description

"MEANS FOR FIXING BY INTERLOCKING AND CONTAINER FIXED THEREBY"
TECHNICAL FIELD
The present invention relates to the field of the assembly and fitting of elements, more particularly the connection of an object or article to a planar or non-planar support such as a wall, and concerns a means for fixing by interlocking and a container or casing fixed by at least one such means. BACKGROUND ART
There is currently a need for fixing means which are simple and quick to use and are limited to a single piece (not requiring a mating piece), are easy and inexpensive to produce, allow detachable fitting and do not require awkward treatment or preparation of the receiving supporting wall or tools for the handling thereof.
This need is particularly pronounced in the automotive industry for the fixing of containers or casings under the bonnet and in the environment of vehicle engines, in view in 'particular of the methods of production (assembly line) and constraints concerning size, access and cost price.
A further desired advantage concerns the possibility of manufacturing the fixing means integrally with the object or article to. be fixed. DISCLOSURE OF INVENTION
It is therefore the object of the present invention to provide a fixing means as well as a container or casing equipped with such a fixing means for meeting at least some of the aforementioned requirements while overcoming the limitations of current fixing systems.
The present invention accordingly relates to a means for fixing by interlocking, adapted to be fitted into an orifice or an aperture in the form of a slot or oblong hole made in a wall, characterised in that it consists of a body in the form of a ring or a link or of part of a ring or a link, produced from an at least slightly elastically deformable material and comprising, on two mutually facing ring or link portions, sites for retention by interlocking which are intended to mesh under elastic stress in the region of the wall edges defining the opposing ends of the aperture in the form of a slot or oblong hole. The invention also relates to a container or casing for connection to a wall, in particular to a thin wall, characterised in that it is connected to said wall via at least one means of fixing by interlocking as described hereinbefore, extending in at least one orifice or aperture of appropriate shape made in said wall. BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be understood better by means of the following description which relates to a preferred embodiment given as a non-limiting example and explained with reference to the accompanying schematic drawings, in which:
Fig. 1 is a plan view, slightly in perspective, of a fixing means according to the invention;
Fig. 2 is a lateral elevation of the fixing means of Fig. 1 as viewed in direction A;
Fig. 3 is a plan view of a fixing means according to a variation of the invention;
Fig. 4 is a partial plan view slightly in perspective and in section of a container or a casing equipped with two fixing means according to the invention;
Fig. 5 is a partial plan view of a container of the spherical reservoir type equipped with two fixing means according to Fig. 1 and 2 and with an elastic support element which also forms part of the invention;
Fig. 6 is a lateral elevation of a fixing plate according to the invention, and
Fig. 7 is a perspective view, partially in section, of a plate according to Fig. 6 provided on a container or casing shown in part in Fig. 5.
BEST MODE FOR CARRYING OPT THE INVENTION
Fig. 1 to 3 show a means for fixing by interlocking 1 adapted to be fitted in an orifice or an aperture in the form of a slot or oblong hole 2' made in a wall 2.
According to the invention, the means for fixing consists essentially of a body 1 in the form of a ring or a link or of part of a ring or a link, produced from an at least slightly elastically deformable material and comprising, on two mutually facing ring or link portions 1' and 1", sites for retention by interlocking 3, 3' which are intended to mesh under elastic stress in the region of the wall edges 2" defining the opposing ends of the aperture 2' in the form of a slot or oblong hole.
If the wall 2 is relatively thin, the retention sites 3, 3' could mesh with the thickness (actual or apparent in the region of the aperture 2') of said wall 2 itself. However, if the wall is relatively thick, said retention sites 3, 3' could also mesh with studs or similar protuberances formed in the region of the ends of the aperture 2' or in the passage following it, said aperture 2' being open or blind.
Advantageously, the body 1 will be axially dimensioned in such a way that, in the interlocking fitting position, the sites 3, 3' mesh under elastic stress generated by the deformation by compression of the branches V and 1" forming arcs or parts of an arc, on the opposing wall edges 2" of said aperture 2'.
Furthermore, the annular structure of the body 1 limits the amount of material required for production thereof while affording good fitting strength owing to the spaced supports of the branches V and 1" in the aperture 2' and their elastic adhesion in the region of the wall edges 2" of the opposing ends of the aperture 2'.
According to an advantageous embodiment of the invention, the body 1 consists of a thermoplastic material (for example polypropylene) and the sites for retention by interlocking 3 and 3' each consist oLa. local recess or contraction in section 4, 4' of the portion of ring or link 1', 1" or branch concerned, located directly adjacent to a protuberance or to a thickening in section 5, 6 in the form of a catch or wedge which precedes it in the direction of the leading end 1'" for introduction of said body 1 with an inclined ramp directed thereto.
At least one of the recesses 4, 4' could possibly consist of a return to the conventional cross- section of the appropriate branch V, 1", following the thickening in section formed by the protuberance 5, 6 preceding it. The body 1 could be wedged in the aperture 2' by exerting a permanent force of retraction on said body 1 (opposed to the force of introduction into the aperture 2') generated, for example, by a spring or elastically deformable element.
Alternatively or additionally, to achieve wedging in a total or partial position, it may be provided that at least one 4 of the recesses or contractions 4, 4' is also followed by a protuberance or a thickening in section 5' so as to form a dish with straight walls delimited on either side by a protuberance 5, 5', the bottom of said dish 4 and advantageously at least a part of its lateral edges being shaped to receive, substantially by connection or mating, the wall edge 2" defining the corresponding end of the appropriate fitting aperture or orifice 2'.
Partial wedging may be achieved by means of a double protuberance 5, 5' on one branch 1' and a single protuberance 6 on the other branch 1" (Fig. 1), whereas total wedging may be 'achieved by means of two double protuberances 5, 5' and 6, 6' on the two branches V and 1" ofthe body 1 (Fig. 3).
According to a preferred embodiment shown in Figs. 1 to 5 of the accompanying drawings, the annular or quasi-annular body 1 has a general shape which is substantially elliptical or partially inscribed in an ellipse, with a structure which is slightly tapered in the direction of the arcuate part 1'" forming the leading end for introduction of said body 1, one 1" of the longitudinal portions or branches 1', 1" of said body 1 being stiffened, for example by a rib 7, to provide laterally adjusted and wedged positioning of the body 1 in the aperture 2'.
To facilitate production thereof, to allow easy adjustment of its elastic compressive strength (deformation while bringing together the two ring branches or portions 1' and 1") and to impart good rigidity to the body 1 in a direction intersecting (in particular perpendicular) with its median plane, the body 1 advantageously has a substantially rectangular conventional cross-section with an orientation of the greatest transverse dimension perpendicular to the parallel planes containing said body 1, the body 1 being integral with an object, an article or a part 8 to be fixed to said wall 2. Referring to Fig. 3 of the accompanying drawings, the body 3 could form a complete loop corresponding to an egg-shaped contour.
According to a particularly advantageous embodiment of the invention shown in Figs. 1, 4 and 5 of the accompanying drawings, however, the body 1 extends over about three-quarters (%) of a ring or link of substantially elliptical general shape -and integral with the object or article 8 to be fixed or formed in one piece therewith and it cooperates with an elastic support element 9 which is preferably formed in one piece with the aforementioned object or article and makes spring contact with the wall 2 when the retention sites 3, 3' for the body 1 latch or interlock elastically on the opposing wall edges 2" of the appropriate aperture 2', so as to lock the assembly [body 1/support element 9/object or article 8] in position by pinching the wall 2 between said support element 9 and the protuberances or thickenings 5 and 6 of said retention sites 3 and 3'.
The support element 9 itself could possibly form a constituent functional part of the object or article 8 (wall part, for example) or constitutes a particular element formed on said body such as a deformable wing.
The present invention also relates to a container or casing for connection to a wall, in particular to a thin wall, characterised in that it is connected to said wall 2 via at least one means of fixing by interlocking 1 as described hereinbefore, extending in at least one orifice or aperture 2' of appropriate shape made in said wall 2.
Preferably, to achieve a strong rigid connection between the container or casing 8 and the wall 2, the container or casing 8 is provided with two means of fixing by interlocking 1 and with at least one elastic support element 9, for example in the form of an arcuate wing, preferably formed from thermoplastic material integrally with said container or casing 8.
To increase the force of support and attachment as well as the strength of the assembly, the bodies 1 forming the two fixing means are disposed in a mutually parallel manner, preferably in a coplanar manner, while optionally being mutually offset in the direction perpendicular to their median planes (Fig. 4 and 5). If the container or the casing 8 is too heavy and/or if it is necessary to fix it very rigidly to a wall 2, it may also comprise, as shown in Figs. 6 and 7 of the accompanying drawings, an additional fixing plate 10 for attaching said container or casing 8 to a portion of wall 11' equipped with a fixing orifice 12 and located in a plane substantially perpendicular to the plane containing the portion of wall 11 provided with said at least one aperture 2' for receiving said at least one means for fixing by interlocking 1.
Obviously the relative dispositions of the fixing means 1 and the plate 10 will be adapted to the local configurations of the portions of walls 11 and 11'.
Preferably, the means 1 will effect lateral fixing and the plate 10 lower support and fixing.
To produce an easy fixing without additional parts and tools, between the container or casing 8 and the wall 2, the plate 10 may comprise a leading arcuate wing portion 13 and a catch 14 for locking in the fitted position, optionally with profiled structures formed in one piece with said plate 10 and interacting to form complementary means for fitting by interlocking of said plate 10 in the fixing orifice 12 of the wall portion 11', said orifice 12 preferably having a rectangular shape and the plate 10 being extended by a support tongue 10'.
Preferably, the direction of fitting of the plate 10 will also be substantially perpendicular to the direction of fitting of the means 1.
In an advantageous application of the invention, shown in Figs. 4 to 7, said casing or container 8 consists of a reservoir, for example for coolant, of an automotive vehicle, the thin fixing wall 2 (wall portions 11 and 11') being formed by a sheet-metal part closing the engine compartment of said. vehicle and provided with cut-outs or indents forming the fitting and receiving orifices or apertures 2' and 12 respectively.
This reservoir 8 may therefore be fitted very easily by firstly introducing the means 1 as far as possible into its respective orifice 2' until it interlocks, then by interlocking the wing 13 in the orifice 12 abutting against the edge thereof and simultaneously by introducing the second means 1 into its adapted orifice 2' supported against the stiffened branch 1", also until its sites 3, 3' interlock in the region of said orifice 2' and of the catch 14 in the orifice 12, all these operations being carried out without tools and while manipulating said reservoir 8 directly.
Said reservoir 8 may also be easily removed by firstly raising the extension 10' until the catch 14 is disengaged, then by extracting the wing 13 and, finally, by disengaging the fixing means 1, if necessary by pinching the loops to facilitate extraction thereof.
The invention is obviously not limited to the embodiment described and illustrated in the accompanying drawings. Modifications are possible, in particular with regard to the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims

Claims
1. Means for fixing by interlocking, adapted to be fitted into an orifice or an aperture in the form of a slot or oblong hole made in a wall, characterised in that it consists of a body (1) in the form of a ring or a link or of part of a ring or a link, produced from an at least slightly elastically deformable material and comprising, on two mutually facing ring or link portions (1* and 1"), sites for retention by interlocking (3, 3') which are intended to mesh under elastic stress in the region of the wall edges (2") defining the opposing ends of the aperture (2') in the form of a slot or oblong hole.
2. Fixing means according to claim 1, characterised in that the body (1) consists of a thermoplastic material and in that the sites for retention by interlocking (3 and 3') each consist of a local recess or contraction in section (4, 4") of the portion of ring or link (1', 1") or branch concerned, located directly adjacent to a protuberance or to a thickening in section (5, 6) in the form of a catch or wedge which precedes it in the direction of the leading end (1'") for introduction of said body (1) with an inclined ramp directed thereto.
3. Fixing means according to claim 2, characterised in that at least one (4) of the recesses or contractions (4, 41) is also followed by a protuberance or a thickening in section (5) so as to form a dish with straight walls delimited on either side by a protuberance (5, 5'), the bottom of said dish (4) and advantageously at least a part of its lateral edges being shaped to receive, substantially by connection or mating, the wall edge (2") defining the corresponding end of the appropriate fitting aperture or orifice (2').
4. Fixing means according to any of claims 1 to 3, characterised in that the annular or quasi-annular body (1) has a general shape which is substantially elliptical or partially inscribed in an ellipse, with a structure which is slightly tapered in the 'direction of the arcuate part (1'") forming the leading end for introduction of said body (1), one (1") of the longitudinal portions or branches (l1, 1") of said body (1) being stiffened, for example by a rib (7).
5. Fixing means according to any of claims 1 to 4, characterised in that the body (1) has a substantially rectangular conventional cross-section with an orientation of the greatest transverse dimension perpendicular to the parallel planes containing said body (1) and in that it is integral with an object, an article or a part (8) to be fixed to said wall (2).
6. Fixing means according to any of claims 2 to 5, characterised in that the body (1) extends over about three-quarters (%) of a ring or link of substantially elliptical general shape and integral with the object or article (8) to be fixed or formed in one piece therewith and in that it cooperates with an elastic support element (9) which is preferably formed in one piece with the aforementioned object or article and makes spring contact with the wall (2) when the retention sites (3, 3') for the body (1) latch or interlock elastically on the opposing wall edges (2") of the appropriate aperture (21), so as to lock the assembly [body (l)/support element (9)/object or article (8)] in position by pinching the wall (2) between said support element (9) and the protuberances or thickenings (5 and 6) of said retention sites (3 and 3').
7. Container or casing for connection to a wall, in particular to a thin wall, characterised in that it is connected to said wall (2) via at least one means of fixing by interlocking (1) according to any of claims 1 to 6, extending in at least one orifice or aperture (2') of appropriate shape made in said wall (2).
8. Container or casing according to claim 7, characterised in that it is provided with two means of fixing by interlocking (1) and with at least one elastic support element (9), for example in the form of an arcuate wing, preferably formed from thermoplastic material integrally with said container or casing (8).
9. Container or casing according to claim 8, characterised in that the bodies (1) forming the two fixing means are disposed in a mutually parallel manner, ' preferably a coplanar manner.
10. Container or casing according to any of claims 7 to 9, characterised in that it also comprises an additional fixing plate (10) for attaching said container or casing (8) to a portion of wall (11") equipped with a fixing orifice (12) and located in a plane substantially perpendicular to the plane containing the portion of wall (11) provided with said at least one aperture (2') for receiving said at least one means for fixing by interlocking (1).
11. Container or casing according to claim 10, characterised in that the fixing plate (10) comprises a leading arcuate wing portion (13) and a catch (14) for locking in the fitted position, optionally with profiled structures formed in one piece with said plate (10) and interacting to form complementary means for fitting by interlocking of said plate (10) in the fixing orifice (12) of the wall portion (11'), said orifice (12) preferably having a rectangular shape and the plate (10) being extended by a support tongue (10').
12. Container or casing according to any of claims 7 to 11, characterised in that it consists of a reservoir, for example for coolant, of an automotive vehicle, the thin fixing wall (2) being formed by a sheet-metal part closing the engine compartment of said vehicle and provided with cut-outs or indents forming the fitting orifices or apertures (2').
PCT/EP2002/010619 2001-09-21 2002-09-20 Means for fixing by interlocking and container fixed thereby WO2003027513A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0112236A FR2830060B1 (en) 2001-09-21 2001-09-21 MEANS OF ATTACHMENT ATTACHMENT AND CONTAINER FIXED THEREWITH
FR01/12236 2001-09-21

Publications (1)

Publication Number Publication Date
WO2003027513A1 true WO2003027513A1 (en) 2003-04-03

Family

ID=8867532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/010619 WO2003027513A1 (en) 2001-09-21 2002-09-20 Means for fixing by interlocking and container fixed thereby

Country Status (2)

Country Link
FR (1) FR2830060B1 (en)
WO (1) WO2003027513A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2921019B1 (en) * 2007-09-13 2010-01-08 Renault Sas FIXING ARRANGEMENT FOR A LIQUID TANK ON A STRUCTURAL ELEMENT OF A MOTOR VEHICLE

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338689A (en) * 1965-09-13 1967-08-29 Marvin E Hetzel Chain form clip
FR2159898A5 (en) * 1971-11-03 1973-06-22 Eaton Corp
FR2187039A5 (en) * 1972-05-29 1974-01-11 Taravello Alpho Se
DE8704686U1 (en) * 1987-03-30 1987-05-27 Fritz Schaefer Gmbh, 5908 Neunkirchen, De
EP0431992A1 (en) * 1989-11-03 1991-06-12 Alcan France Connecting chip, in principal for a two profile assembly
CH684109A5 (en) * 1991-12-10 1994-07-15 Fehlbaum & Co Flexible U=shaped clip for cladding panel on building
DE29609198U1 (en) * 1996-05-23 1996-09-12 Camloc Gmbh Snap lock for the detachable connection of two components
EP1067004A1 (en) * 1999-07-08 2001-01-10 Valeo Thermique Moteur Arrangement for fastening a fluid tank in a motor vehicle

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338689A (en) * 1965-09-13 1967-08-29 Marvin E Hetzel Chain form clip
FR2159898A5 (en) * 1971-11-03 1973-06-22 Eaton Corp
FR2187039A5 (en) * 1972-05-29 1974-01-11 Taravello Alpho Se
DE8704686U1 (en) * 1987-03-30 1987-05-27 Fritz Schaefer Gmbh, 5908 Neunkirchen, De
EP0431992A1 (en) * 1989-11-03 1991-06-12 Alcan France Connecting chip, in principal for a two profile assembly
CH684109A5 (en) * 1991-12-10 1994-07-15 Fehlbaum & Co Flexible U=shaped clip for cladding panel on building
DE29609198U1 (en) * 1996-05-23 1996-09-12 Camloc Gmbh Snap lock for the detachable connection of two components
EP1067004A1 (en) * 1999-07-08 2001-01-10 Valeo Thermique Moteur Arrangement for fastening a fluid tank in a motor vehicle

Also Published As

Publication number Publication date
FR2830060A1 (en) 2003-03-28
FR2830060B1 (en) 2004-07-23

Similar Documents

Publication Publication Date Title
CN110388359B (en) Seal-coupled fastener assembly
US20200208660A1 (en) Dual material u-base fastener
US4224001A (en) Windshield wiper connecting pin adaptor
KR101332690B1 (en) Connecting apparatus for hinging a joining element rigidly connected to a wiper arm
US8438692B2 (en) Wiper blade with connector and method for making such blade
EP1192870B1 (en) Buckle
US4324019A (en) Windshield wiper connecting pin adaptor
US6415566B2 (en) Mobile partition
EP1800557A1 (en) Waterproof slide fastener
JPH07158621A (en) Coupling element made of plastic
US6322148B1 (en) Vehicle seat connection assembly
ES2416531T3 (en) Seat belt anchor set
US20100107372A1 (en) Locked base trim clip
WO2003027513A1 (en) Means for fixing by interlocking and container fixed thereby
US5981872A (en) Method and device for more firmly securing to trunking an accessory of any kind to be attached to the base thereof by nesting over it
US5906377A (en) Positive coupling structure
CN111051154A (en) Windshield wiper connector and assembly
CN109849634A (en) Water cut end head mounting structure and vehicle
EP3944987A1 (en) A cargo ring
JP3580472B2 (en) Mounting structure for box-type electrical components
KR20010034637A (en) Panel fastener and retainer device
RU2010107280A (en) WINDSHIELD WIPER
CN108463372A (en) Handrail is set to be assemblied in the configuration on Vehicular door
JPH0733930Y2 (en) Mall clip assembly
EP1300604A2 (en) Loop chain structure

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BY BZ CA CH CN CO CR CU CZ DE DM DZ EC EE ES FI GB GD GE GH HR HU ID IL IN IS JP KE KG KP KR LC LK LR LS LT LU LV MA MD MG MN MW MX MZ NO NZ OM PH PL PT RU SD SE SG SI SK SL TJ TM TN TR TZ UA UG US UZ VN YU ZA ZM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ UG ZM ZW AM AZ BY KG KZ RU TJ TM AT BE BG CH CY CZ DK EE ES FI FR GB GR IE IT LU MC PT SE SK TR BF BJ CF CG CI GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP