EP0878280B1 - Electro-manual smoothing planer - Google Patents

Electro-manual smoothing planer Download PDF

Info

Publication number: EP0878280B1
Authority: EP; European Patent Office
Prior art keywords: roll; tool; plane; smoothing; resting
Prior art date: 1997-05-12
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

Application number

EP98108380A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP0878280A3 (en

EP0878280A2 (en

Inventor

Ezio Trevisiol

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Trevisiol Ezio

Original Assignee

Individual

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.)

1997-05-12

Filing date

1998-05-08

Publication date

2006-11-15

1998-05-08 Application filed by Individual filed Critical Individual

1998-11-18 Publication of EP0878280A2 publication Critical patent/EP0878280A2/en

2003-09-24 Publication of EP0878280A3 publication Critical patent/EP0878280A3/en

2006-11-15 Application granted granted Critical

2006-11-15 Publication of EP0878280B1 publication Critical patent/EP0878280B1/en

2018-05-08 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
- B27C1/10—Hand planes equipped with power-driven cutter blocks
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
- B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor

Definitions

the present invention concerns a portable electro-manual smoothing planer according to the preamble of claim 1.
the essential elements of the present portable electric planer remain: the resting planes and the blade-holder roll endowed with knives which by its vertical revolving action carries out a removal of the wood, still in chips.
the action remains a cutting one carried out by blades or chisels.
the material which is interesting to work by using the electric planer is the foam polystyrene or other similar foam plastic material, having a low density and a poor consistency.
planer blades also known as jack plane
jack plane were not able, to carry out the desired cutting action, but instead tended to strip and disjoin irregularly the worked material in small pieces giving a poorly finished and rough product.
Purpose of the invention is solving this problem by obviating the above mentioned drawbacks.
this tool should preferably be light and compact for easing the handling (length 30-65 cm. - width and height about 15 cm.).
the machine frame or supporting body will be made up of two shells (6 , 5) in plastic material joined along the middle longitudinal line of the tool by self-threading screws.
Such shells will determine the same machine aesthetical shape and will have to support, contain and join all the manufacturing details.
Both motor (19) and smoothing roll (13) are housed inside of the shells transversally respect to the tool's longitudinal axis, both rest by means of pins on the relative bearings which in turn have their seat on the frame walls. Except for the bearing opposite to the roll transmission side which for practical reasons may be contained by the same roll or, in alternative, by the access flange (14) to the roll, also present on the side opposite to that of transmission.
the motors used in the tested prototypes had rather low power such as 300 and 500 watt and allowed roll speeds respectively of 17.000 revolutions a minute for the first one, and 14.500 revolutions a minute for the second one. In the first case the abrasive roll had a diameter of 3,5 cm., in the second case of 5 cm. The motors anyway in no case showed any kind of lacks or problems resulting very suitable for the use.
the two respectively resting and sliding planes are fixed to the shells: the fixed rear one (3) and the movable front one (4)
the second one moves in height at a certain extent.
the front handgrip, knob-like shaped, (1) may further have the function of carrying out by a joining screw (18) the lifting or lowering of said front resting plane also known as tool front resting plane.
the external carter on the left side (6) contains and protects the transmission pulleys (7, 9) respectively fixed in the roll and motor pins, protruding from the shell.
the motor pulley has a diameter of about half the roll's.
the coupling and transmission will be ensured by a toothed belt (8).
the carter (21) covers and gives access to the motor main bearing and besides allows to carry out the brushes replacement (20) of the same.
the smoothing planer comprises the roll (13) interchangeable with a roll having cutting blades or with a roll having an abrasive surface (13, 22).
a particular roll shape for receiving alternatively either the cutting blade or the abrasive coating, with a normal design solution may be provided.
a typical and necessary detail of the new tool, found on the right side in correspondence of the smoothing roll seat is the flange or removable carter (14) which allows an easy access to the roll for replacing the abrasive material.
Said flange will preferably be of metal material requiring a good stiffness, will support the right bearing which in turn will house the roll pin or support a pin in case the bearing was included on the roll itself.
a series of holes along its perimeter in correspondence of threaded pins fixed on the frame (15) of the smoothing planer which will ease its fixing by means of self-locking bolts or fixing ring nut and the centring respect to the roll axis is provided. Once closed, the flange hermetically matches with the shell for avoiding the dusts coming out from possible slits during the working.
the machine rear handgrip (2) contains the electrical or electronical switch (12) and is made up of the same extension of the two shells forming the bearing frame. For handling reasons it would be desirable if this handgrip had an inclination of about 45° respect to the sliding planes.
the rear wall of the smoothing roll seat obtained inside of the shell (27) follows the shape of this same at a distance between about 3-5 mm, the front part (28) starting at the same distance from the roll in the contact point with the front resting plane it is progressively spaced for creating the exit channel (17) and the necessary hollow for the dust discharge, a typical functional scheme of the centrifugal fans.
the dust discharging channel (17-11) is commonly placed above the smoothing roll and its exit hole may be located in the most suitable position, in the specific and suitable case, the lateral one.
the smoothing roll (13) is with no doubt the essential most important and typical member of the smoothing planer, that is the part which combined with the other ones gives the innovative and special performances which distinguish this tool for effectiveness and purpose of usage.
the roll will meet the material to be worked by rotating in opposite direction respect to the tool advancement direction.
the roll (13) will have in particular the ability to support the abrasive (22) which will be interplaced on the same, both in case of wear, and if a change of the grain or quality is desired.
the abrasive will therefore be shaped like sleeves (22) which will be inserted over the smoothing rotating cylinder (13).
the essential characteristics for the abrasive-holder roll when in working position on the roll (13) are:
metal materials such as aluminium and steel which may supply the needed requisites and guarantee a better heat absorption and dissipation will be therefore preferable.
the abrasive spares will be shaped as sleeves (22) with a length equal to the one of the roll which will support them (13) and shall have such a stiffness that will allow them to be inserted on it with a certain pressure without bending or becoming flabby. It is important that between roll and sleeve there is the least possible tolerance being though able to guarantee the insertion and extraction of this latter by a thrust of about 10 kg. This for guaranteeing the maximum integration and functionality between the two elements.
the tested sleeves prototypes are made up of some fibreglass layers impregnated with epoxidic resin on which later some strong abrasive canvas with a grain of 60 was fixed.
some tubes having a thickness of about one millimetre (but we could use also higher thicknesses), which once inserted in the abrasive-holder roll will be integral with it guaranteeing regularity and homogeneity of yield.
two small protrusions (25) or guides in diametrically opposed position may be provided and will have the function of avoiding the rotation between roll and sleeve.
Two fissures (26) in a corresponding position are provided on the roll having both the function of housing the sleeve guides, and of allowing the extraction of this latter by using a simple extractor (24).
a simple extractor 24
the extractor (24) will be made up of a steel fork at whose outwards turned ends there will be two small protrusions (fins).
the extractor By using the fissures (26) provided in the roll, the extractor will penetrate up to its base and hook the sleeve on the lower edge by the fins. Gripping the fork with two fingers and laying the hand palm on a small counter-thrust small rod (23) directed against the roll in the pin area, by an easy traction it will be possible to extract the sleeve without an excessive effort.
This operation together with that of opening and closing the pin holder flange (14) of the roll by acting on the suitable bolts or spring ring nut will be the actions necessary to replace the abrasive, even if this possibility is not as frequent as in other types of smoothing machine.
the materials to be worked are the most different ones and they may be treated also when coupled and with different or opposite characteristics.
the new smoothing planer offers optimal solutions for the planes grinding; for the joining of wide radius curved lines; for low density materials working; for fibrous and strong materials working; for removing surfacing or protrusions from flat surfaces also in very soft materials without touching or marking them; it is ideal for plastic laminates where chipping must be avoided; for fibreglass or the like; for wood when small shape corrections are necessary. It has a good working economy and use facility which make it suitable for any user.

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Wood Science & Technology (AREA)
Forests & Forestry (AREA)
Milling, Drilling, And Turning Of Wood (AREA)
Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Soil Working Implements (AREA)
Finger-Pressure Massage (AREA)
Liquid Crystal (AREA)
Eye Examination Apparatus (AREA)
Steroid Compounds (AREA)
Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

EP98108380A 1997-05-12 1998-05-08 Electro-manual smoothing planer Expired - Lifetime EP0878280B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
IT97TV000063A IT1293358B1 (it)	1997-05-12	1997-05-12	Pialla levigatrice elettromanuale
ITTV970063		1997-05-12

Publications (3)

Publication Number	Publication Date
EP0878280A2 EP0878280A2 (en)	1998-11-18
EP0878280A3 EP0878280A3 (en)	2003-09-24
EP0878280B1 true EP0878280B1 (en)	2006-11-15

Family

ID=11420172

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98108380A Expired - Lifetime EP0878280B1 (en)	1997-05-12	1998-05-08	Electro-manual smoothing planer

Country Status (5)

Country	Link
EP (1)	EP0878280B1 (it)
AT (1)	ATE345203T1 (it)
DE (1)	DE69836397T2 (it)
ES (1)	ES2276438T3 (it)
IT (1)	IT1293358B1 (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
ITTV20030122A1 (it) *	2003-09-03	2003-12-02	Ezio Trevisiol	Pialla abrasiva evoluzione
RU2286246C2 (ru) *	2004-11-26	2006-10-27	Лев Александрович Пономарев	Механический рубанок
GB0722107D0 (en) *	2007-11-10	2007-12-19	Exakt Prec Tools Ltd	Improvements in adn relating to power tools
GB2460415A (en) *	2008-05-28	2009-12-02	Black & Decker Inc	Hand held powered planer with handle attached at one end to housing

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1980056A (en) *	1933-02-08	1934-11-06	Hans U Hedeby	Power actuated hand plane
US2540258A (en) *	1945-08-14	1951-02-06	Thomas J Harris	Hand-operated electric powered dresser
US4363343A (en) *	1980-09-24	1982-12-14	Black & Decker Inc.	Combination guard and rabbeting depth gauge associated with power planer
DE3406728A1 (de) *	1984-02-24	1985-08-29	Karl M. Reich Maschinenfabrik GmbH, 7440 Nürtingen	Handhobelmaschine
DE3541728A1 (de) *	1985-11-26	1987-05-27	Festo Kg	Handhobelmaschine
DE8708512U1 (de) *	1987-06-19	1987-08-06	Festo KG, 7300 Esslingen	Handhobelmaschine
CH678032A5 (it) *	1989-03-21	1991-07-31	Andre Casal
FR2670421B1 (fr) *	1990-12-17	1995-03-31	Meffre Olivier	Ponceuse electrique portative.

1997
- 1997-05-12 IT IT97TV000063A patent/IT1293358B1/it active IP Right Grant
1998
- 1998-05-08 DE DE69836397T patent/DE69836397T2/de not_active Expired - Lifetime
- 1998-05-08 ES ES98108380T patent/ES2276438T3/es not_active Expired - Lifetime
- 1998-05-08 EP EP98108380A patent/EP0878280B1/en not_active Expired - Lifetime
- 1998-05-08 AT AT98108380T patent/ATE345203T1/de not_active IP Right Cessation

Also Published As

Publication number	Publication date
EP0878280A3 (en)	2003-09-24
DE69836397D1 (de)	2006-12-28
EP0878280A2 (en)	1998-11-18
ITTV970063A1 (it)	1998-11-12
IT1293358B1 (it)	1999-02-25
DE69836397T2 (de)	2007-09-27
ES2276438T3 (es)	2007-06-16
ATE345203T1 (de)	2006-12-15
ITTV970063A0 (it)	1997-05-12

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