WO1999064212A1 - Portable sawmill - Google Patents

Portable sawmill Download PDF

Info

Publication number
WO1999064212A1
WO1999064212A1 PCT/FI1999/000497 FI9900497W WO9964212A1 WO 1999064212 A1 WO1999064212 A1 WO 1999064212A1 FI 9900497 W FI9900497 W FI 9900497W WO 9964212 A1 WO9964212 A1 WO 9964212A1
Authority
WO
WIPO (PCT)
Prior art keywords
tables
sliding surfaces
frame structure
portable sawmill
saw blade
Prior art date
Application number
PCT/FI1999/000497
Other languages
French (fr)
Inventor
Pasi Tammi
Original Assignee
Tommi Laine Trading Oy
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8551965&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1999064212(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Tommi Laine Trading Oy filed Critical Tommi Laine Trading Oy
Priority to AU47829/99A priority Critical patent/AU4782999A/en
Priority to DE19983283T priority patent/DE19983283T1/en
Priority to CA002334309A priority patent/CA2334309C/en
Priority to EEP200000718A priority patent/EE04267B1/en
Publication of WO1999064212A1 publication Critical patent/WO1999064212A1/en
Priority to SE0004529A priority patent/SE516875C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D53/00—Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting
    • B23D53/06—Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting with shiftable or swinging work-table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/02—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier
    • B23D47/025—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier of tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/04—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
    • B23D47/045—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work feeding work into engagement with the saw blade
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines

Definitions

  • the present invention relates to a portable sawmill and particularly such a portable sawmill which has a saw blade, such as a band or circular saw blade extending essentially vertically upwards in relation to its frame structure, with tables cooperating on both sides of the saw line of the saw blade and reciprocating on the frame structure parallel with the saw blade, wherein friction reducing means are provided on the path of the tables by means of which the tables are movable to and from in the direction of the saw line by the saw blade.
  • a saw blade such as a band or circular saw blade extending essentially vertically upwards in relation to its frame structure
  • a disadvantage of these portable sawmills of prior art is e.g. the high noise level when the tables hit the rolls in front of them when moving.
  • Another disadvantage is the jumping movement of the tables when they are transferred from one roll to another, which, with time, bends the tables and makes the use of the portable saw more difficult.
  • the heavy tables moving on the rolls constitute a safety risk, as the user's hand may be displaced between a roll and the end of a table and authorities demand the safety risk to be eliminated.
  • the rolls with their bearings and bearing supports increase the production costs and weight of the portable sawmill.
  • the sliding surfaces can be composed of slide rails substantially parallel to the path of the tables, or several separate sliding bodies arranged one after the other substantially in the direction of the path of the tables. Sliding surfaces can be provided on the upper surface of the frame structure or on the lower surface of the tables or on both, substantially on the whole length.
  • the portable sawmill can be equipped with channels entering into the sliding surfaces and con- nected to a source of lubricant for lubricating the sliding surfaces or to a source of pressurized air in order to create a friction reducing air cushion on the sliding surfaces.
  • a source of lubricant for lubricating the sliding surfaces
  • a source of pressurized air in order to create a friction reducing air cushion on the sliding surfaces.
  • magnets which push each other away to create a magnetic buoyancy for the tables.
  • the sliding surfaces can be equipped with recesses, protrusions or brackets extending on the table paths, wherein on the upper surface of the frame structure or on the lower surface of the tables there are at corresponding places protrusions, brackets or recesses compatible therewith.
  • the sliding surfaces are preferably of some slippery plastic, such as Nylon, Teflon, polyethylene or the like.
  • some slippery plastic such as Nylon, Teflon, polyethylene or the like.
  • the frame structure of a portable sawmill is generally indicated with reference numeral 1 , tables movable above the frame structure 1 in its longitudinal direction with reference numeral 2, and a saw blade arranged between the tables 2, vertically in relation to the frame structure 1 , with reference numeral 3, the saw line of the saw blade indicated with a broken line between the tables 2, wherein the tables 2 move in alignment with the saw blade 3 on both sides of the saw line.
  • the mechanism for movement of the tables 2 is not shown in the drawing, because it has a conventional construction.
  • the lower surface of the tables 2 and, correspondingly, the upper surface of the frame structure 1 are provided with superimposed streamline tubes 6 at a transverse distance from each other, the streamline tubes 6 extending in the longitudinal direction of the frame structure 1 , i.e. in the direction of the path of the tables 2.
  • the upper surface of the lower streamline tubes 6 fixed to the frame structure 1 is provided with sliding bodies 5 of equal width, arranged sequentially in the longitudinal direction of the lower streamline tubes 6 at a short distance from each other along the whole length of the path of the tables 2.
  • the sliding bodies 5 closest to the saw line of the saw blade 3 have a cross-section of an upside down T, the abutment extending over the whole width of the inner pairs of streamline tubes and the upwards directed branch 8 extending between the corresponding upper pairs of streamline tubes 6.
  • both of the opposite sides of the frame structure 1 are provided with a metal profile 9, whose upper surface that is higher than the frame structure 1 is provided with a sliding body 5 with an L- shaped cross-section, the abutment of the sliding body 5 being fixed to the upper surface of the metal profile 9 and the inner leg extending downwards along the outer surface of the inner wall of the metal profile 9.
  • the lower surface of the outer streamline tube 6 in both tables 2 is provided with an angle iron 4 which has a corresponding shape and direction and, together with the upwards directed branches 8 of the sliding bodies 5 closest to the saw line of the saw blade 3, guides the tables 2 during their movement.
  • the frame structure 1 is provided with channels 7 for a lubricant or pressurized air, the channels 7 entering into the upper surface of each sliding body to reduce friction between the sliding bodies 5 and the upper streamline tubes 6 as well as the angle irons 4.
  • the sliding surfaces are preferably of some slipper plastic, such as Nylon, Teflon, polyethylene or the like. Instead of the sliding bodies, it is equally possible to use slide rails extending in the path of the tables and having the length of the path. Sliding surfaces can also be provided on the lower surfaces of the upper streamline tubes, but it is structurally simpler to supply a lubricant or pressurized air into sliding surfaces in the lower streamline tubes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Abstract

The present invention relates to a portable sawmill with a frame structure (1) and a saw blade (3) extending essentially vertically upwards in relation to the frame structure, tables (2) cooperating on both sides of the saw line of the saw blade and reciprocating on the frame structure (1) parallel with the saw blade (3), wherein there are friction reducing means on the path of the tables (2) by means of which the tables are movable to and from in the direction of the saw line by the saw blade (3). According to the invention, the friction reducing means used are fixed sliding surfaces (5), such as slide rails or sliding bodies arranged sequentially on the table path.

Description

Portable sawmill
The present invention relates to a portable sawmill and particularly such a portable sawmill which has a saw blade, such as a band or circular saw blade extending essentially vertically upwards in relation to its frame structure, with tables cooperating on both sides of the saw line of the saw blade and reciprocating on the frame structure parallel with the saw blade, wherein friction reducing means are provided on the path of the tables by means of which the tables are movable to and from in the direction of the saw line by the saw blade.
There are previously known portable sawmills of the type mentioned in the introduction, in which the tables are movable with rolls mounted on bearings transversely in relation to the path of the tables, the rolls being provided substantially on the whole length of the path of the tables. By means of the rolls, even a heavy timber can be easily moved on the tables by means of a hydraulic traction motor coupled to the tables.
A disadvantage of these portable sawmills of prior art is e.g. the high noise level when the tables hit the rolls in front of them when moving. Another disadvantage is the jumping movement of the tables when they are transferred from one roll to another, which, with time, bends the tables and makes the use of the portable saw more difficult. Furthermore, the heavy tables moving on the rolls constitute a safety risk, as the user's hand may be displaced between a roll and the end of a table and authorities demand the safety risk to be eliminated. Also, the rolls with their bearings and bearing supports increase the production costs and weight of the portable sawmill.
It is an aim of the present invention to eliminate the above-mentioned disadvantages, and this is achieved according to the present invention by replacing the above-mentioned rolls with their bearings and bearing supports primarily with fixed sliding surfaces. On fixed sliding surfaces, tables are moved lightly and without noise. The risk that the user's hand could be displaced between the end of a table and the sliding surfaces no longer exists. Furthermore, the sliding rails are cheaper than the rolls with their bearings and bearing supports and also considerably lighter in weight. The tables are moved on the sliding surfaces smoothly without jumping, wherein the tables remain in their original straight shape. Moreover, the sliding surfaces facilitate the mounting of various additional devices in the portable sawmill and make it possible to develop them further.
The sliding surfaces can be composed of slide rails substantially parallel to the path of the tables, or several separate sliding bodies arranged one after the other substantially in the direction of the path of the tables. Sliding surfaces can be provided on the upper surface of the frame structure or on the lower surface of the tables or on both, substantially on the whole length.
To reduce the friction of the sliding surfaces, the portable sawmill can be equipped with channels entering into the sliding surfaces and con- nected to a source of lubricant for lubricating the sliding surfaces or to a source of pressurized air in order to create a friction reducing air cushion on the sliding surfaces. Alternatively, or in addition, it is possible to use magnets which push each other away to create a magnetic buoyancy for the tables.
To guide the tables during their reciprocating movement, the sliding surfaces can be equipped with recesses, protrusions or brackets extending on the table paths, wherein on the upper surface of the frame structure or on the lower surface of the tables there are at corresponding places protrusions, brackets or recesses compatible therewith.
The sliding surfaces are preferably of some slippery plastic, such as Nylon, Teflon, polyethylene or the like. In the following, the invention will be described in more detail with reference to the appended drawing which shows a cross-section on a preferred embodiment of the invention.
In the drawing, the frame structure of a portable sawmill is generally indicated with reference numeral 1 , tables movable above the frame structure 1 in its longitudinal direction with reference numeral 2, and a saw blade arranged between the tables 2, vertically in relation to the frame structure 1 , with reference numeral 3, the saw line of the saw blade indicated with a broken line between the tables 2, wherein the tables 2 move in alignment with the saw blade 3 on both sides of the saw line. The mechanism for movement of the tables 2 is not shown in the drawing, because it has a conventional construction.
The lower surface of the tables 2 and, correspondingly, the upper surface of the frame structure 1 are provided with superimposed streamline tubes 6 at a transverse distance from each other, the streamline tubes 6 extending in the longitudinal direction of the frame structure 1 , i.e. in the direction of the path of the tables 2.
The upper surface of the lower streamline tubes 6 fixed to the frame structure 1 is provided with sliding bodies 5 of equal width, arranged sequentially in the longitudinal direction of the lower streamline tubes 6 at a short distance from each other along the whole length of the path of the tables 2. The sliding bodies 5 closest to the saw line of the saw blade 3 have a cross-section of an upside down T, the abutment extending over the whole width of the inner pairs of streamline tubes and the upwards directed branch 8 extending between the corresponding upper pairs of streamline tubes 6.
Furthermore, both of the opposite sides of the frame structure 1 are provided with a metal profile 9, whose upper surface that is higher than the frame structure 1 is provided with a sliding body 5 with an L- shaped cross-section, the abutment of the sliding body 5 being fixed to the upper surface of the metal profile 9 and the inner leg extending downwards along the outer surface of the inner wall of the metal profile 9. Moreover, the lower surface of the outer streamline tube 6 in both tables 2 is provided with an angle iron 4 which has a corresponding shape and direction and, together with the upwards directed branches 8 of the sliding bodies 5 closest to the saw line of the saw blade 3, guides the tables 2 during their movement.
In addition, the frame structure 1 is provided with channels 7 for a lubricant or pressurized air, the channels 7 entering into the upper surface of each sliding body to reduce friction between the sliding bodies 5 and the upper streamline tubes 6 as well as the angle irons 4.
The sliding surfaces are preferably of some slipper plastic, such as Nylon, Teflon, polyethylene or the like. Instead of the sliding bodies, it is equally possible to use slide rails extending in the path of the tables and having the length of the path. Sliding surfaces can also be provided on the lower surfaces of the upper streamline tubes, but it is structurally simpler to supply a lubricant or pressurized air into sliding surfaces in the lower streamline tubes.
It is obvious for anyone skilled in the art that the present invention can also be modified in other ways within the scope of the appended claims. Consequently, it is also possible to use conventional rolls in addition to sliding bodies or rails.

Claims

Claims
1. Portable sawmill comprising:
- a frame structure (1),
- a saw blade (3) extending essentially vertically upwards in relation to the frame structure,
- tables (2) cooperating on both sides of the saw line of the saw blade and reciprocating on the frame structure (1) parallel with the saw blade (3), and
- friction reducing means on the path of the tables (2) by means of which the tables are movable to and from in the direction of the saw line by the saw blade (3), characterized in that the friction reducing means are fixed sliding surfaces (5).
2. The portable sawmill of claim 1 , characterized in that the sliding surfaces (5) are slide rails extending substantially in the same direction as the path of the tables.
3. The portable sawmill of claim 1 , characterized in that the sliding surfaces (5) comprise several sliding bodies arranged sequentially on the table path.
4. The portable sawmill of any of the preceding claims, characterized by sliding surfaces (5) on the upper surface of the frame structure (1) and/or the lower surface of the tables (2) essentially over its whole length.
5. The portable sawmill of claim 4 and preferably one wherein the upper surface of the frame structure (1) comprises sliding surfaces
(5), characterized by channels (7) entering into the sliding surfaces and connected to a source of lubricant for lubricating the sliding surfaces (5).
6. The portable sawmill of claim 4 and preferably one wherein the upper surface of the frame structure (1) comprises sliding surfaces
(5), characterized by channels (7) entering into the sliding surfaces and connected to a source of pressurized air in order to create a friction reducing air cushion on the sliding surfaces (5).
7. The portable sawmill of any of the preceding claims, characterized in that the sliding surfaces (5) comprise recesses and/or protrusions/brackets (8) extending on the table (2) paths and on the upper surface of the frame structure (1) or the lower surface of the tables (2) there are at corresponding places protrusions/brackets and/or recesses compatible therewith for guiding the tables (2) during their reciprocating movement.
8. The portable sawmill of any of the preceding claims, characterized in that the sliding surfaces (5) are of some slippery plastic, preferably Nylon, Teflon, polyethylene or the like.
PCT/FI1999/000497 1998-06-11 1999-06-09 Portable sawmill WO1999064212A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU47829/99A AU4782999A (en) 1998-06-11 1999-06-09 Portable sawmill
DE19983283T DE19983283T1 (en) 1998-06-11 1999-06-09 Portable sawing machine
CA002334309A CA2334309C (en) 1998-06-11 1999-06-09 Portable sawmill
EEP200000718A EE04267B1 (en) 1998-06-11 1999-06-09 Mobile sawmill
SE0004529A SE516875C2 (en) 1998-06-11 2000-12-08 Removable saw

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI981341A FI102877B (en) 1998-06-11 1998-06-11 Removable saw
FI981341 1998-06-11

Publications (1)

Publication Number Publication Date
WO1999064212A1 true WO1999064212A1 (en) 1999-12-16

Family

ID=8551965

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1999/000497 WO1999064212A1 (en) 1998-06-11 1999-06-09 Portable sawmill

Country Status (8)

Country Link
AU (1) AU4782999A (en)
CA (1) CA2334309C (en)
DE (1) DE19983283T1 (en)
EE (1) EE04267B1 (en)
FI (1) FI102877B (en)
RU (1) RU2283756C2 (en)
SE (1) SE516875C2 (en)
WO (1) WO1999064212A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264035B (en) * 1959-01-15 1968-03-21 Commergnat Guilliet & Cie Device for holding rinds and boards while sawing on the block cart of a log saw
WO1992015432A1 (en) * 1991-03-05 1992-09-17 Roennberg Oswald Saw mill
WO1995007798A1 (en) * 1993-09-15 1995-03-23 Aasander Jan Staffan A sealing and holding arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264035B (en) * 1959-01-15 1968-03-21 Commergnat Guilliet & Cie Device for holding rinds and boards while sawing on the block cart of a log saw
WO1992015432A1 (en) * 1991-03-05 1992-09-17 Roennberg Oswald Saw mill
WO1995007798A1 (en) * 1993-09-15 1995-03-23 Aasander Jan Staffan A sealing and holding arrangement

Also Published As

Publication number Publication date
AU4782999A (en) 1999-12-30
FI102877B1 (en) 1999-03-15
CA2334309C (en) 2008-08-05
CA2334309A1 (en) 1999-12-16
EE04267B1 (en) 2004-04-15
SE516875C2 (en) 2002-03-19
FI981341A (en) 1999-03-15
FI102877B (en) 1999-03-15
RU2283756C2 (en) 2006-09-20
FI981341A0 (en) 1998-06-11
EE200000718A (en) 2002-04-15
DE19983283T1 (en) 2001-05-17
SE0004529L (en) 2000-12-08
SE0004529D0 (en) 2000-12-08

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