WO2016015733A1 - Scie à onglets à main - Google Patents

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Publication number
WO2016015733A1
WO2016015733A1 PCT/DK2015/050227 DK2015050227W WO2016015733A1 WO 2016015733 A1 WO2016015733 A1 WO 2016015733A1 DK 2015050227 W DK2015050227 W DK 2015050227W WO 2016015733 A1 WO2016015733 A1 WO 2016015733A1
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WO
WIPO (PCT)
Prior art keywords
miter
saw
hand
lever
held
Prior art date
Application number
PCT/DK2015/050227
Other languages
English (en)
Inventor
Silas Ohm SAUER
Original Assignee
Silas List Cutter Aps
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 Silas List Cutter Aps filed Critical Silas List Cutter Aps
Publication of WO2016015733A1 publication Critical patent/WO2016015733A1/fr

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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
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/16—Hand-held sawing devices with circular saw blades
    • 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
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/006—Sawing machines or sawing devices with circular saw blades or with friction saw discs with means to attach the sawing device to the workpiece
    • 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
    • B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/04—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever
    • B23D45/042—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever with the saw blade carried by a pivoted lever
    • B23D45/044—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock carried by a pivoted lever with the saw blade carried by a pivoted lever the saw blade being adjustable according to angle of cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • B27G19/04—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws for manually-operated power-driven circular saws

Definitions

  • the present invention relates to a hand-held miter saw, comprising
  • An electrically powered miter saw makes cuts through workpieces by pulling a spinning circular saw blade down onto the workpiece in a short, controlled motion. During cutting the workpiece is held flat against the fence and the vertical saw blade is moved vertically through the workpiece by guiding the saw blade towards said workpiece by pushing the cutter head.
  • the conventional miter saw is a stationary power tool placed firmly on a support surface so that the table can turn in a turning plane parallel to the plane of the support surface, which the miter saw is placed on.
  • a species among miter saws is a compound miter saw, which also is a stationary miter saw.
  • the compound miter saw allows the cutter head with the saw blade to be tilted sideways in addition to the table being able to be turned in the horisontal plane. This allows both vertical and horizontal angled cuts as well as cuts angled in both planes.
  • Conventional handheld miter saws have no table. Instead the workpiece must be held by the hand or be placed against another object during cutting. As a consequence the final angle of the cut inevitably becomes very unprecise.
  • Danish patent application no. PA 2012 00664 and International patent application no. PCT/DK2013/050419 recently introduced a revolutionary new miter saw technology in form of a hand-held miter saw with an integral table.
  • the table but not the cutter head can turn to arrange a workpiece at a miter angle with the saw blade.
  • the table has a guideway for the workpiece and because the table can turn the guideway can be moved clockwise and counter-clockwise to form an angle with the axis of rotation of the saw blade.
  • Two pivotable connected levers serve like a tong or a scissor to be operated by one hand while the other hand is used to hold the workpiece firmly against the guideway of the table. As the first hand closes the gap between the levers the saw blade cuts through the workpiece on the table.
  • the present invention relates to yet an improvement of applicants aforementioned innovative hand-held miter saw known from the above Danish patent application no. PA 2012 00664 and International patent application no. PCT/DK2013/050419.
  • the disclosures of these applications are incorporated in full in the present patent application.
  • the toggle mechanism, the cutter head, the motor and the levers described in these patent publications are implemented in the present invention and all features relating to their structure and operation forms part of the present application.
  • hand-held means in the present application that the miter saw is held solely by the hands of an operator when cutting a workpiece, such as a rod or list, and the term “miter angle” means that the cut forms an angle with the longitudinal direction of said workpiece either crosswise og lengthwise.
  • the miter saw has a miter angle adjusting mechanism adapted to tilt the table in relation to the rotation plane of the saw blade.
  • the miter angle adjusting mechanism can be operated to set the angle between the table plane and the rotation plane to an angle different from 90° by tilting the table, and thus tilting the table plane.
  • the table is tilted about a tilting axis, which is defined as being
  • a hand-held power tool can be used in many orientations based on what is convenient or preferred for and by a specific user. So when the user operates a hand-held miter saw as described in Danish patent application no. PA 2012 00664 and International patent application no. PCT/DK2013/050419 or of the present invention he/she needs not hold the table flush with e.g. the ground on which he/she stands as is the situation for conventional stationary miter saws, nor need the rotation plane of the saw blade be perpendicular to the ground or surface on which he/she stands. The operator has a high degree of freedom to select his best working position because the hand-held miter saw is always immediately at hand and needs no support face to be placed on.
  • the table When the table is described in the present invention to be positioned “horizontal” it means that the saw blade cuts substantially perpendicular to the table plane, irrespective of where and how the miter saw in itself and otherwise is arranged in the working space.
  • the miter angle is adjusted by turning the table clockwise or counter clockwise in the "horizontal plane” of the table, but the attack angle of the saw blade towards the table is perpendicular. So the rotation plane of the saw blade and the table plane of the table intersect substantially perpendicular.
  • the term “turning” is used in relation to altering the miter angle in the horizontal plane.
  • the table When the table is “horizontal” the pivot axis of the pivot axle of the levers is in the same plane as the table plane or parallel to said plane and the table can be turned into a miter angle by turning a "turning angle".
  • the table When in the present invention the table is said to be “vertical”, in the “vertical plane” or is “tilted into a vertical position” it means that the table is pivoted out of the horizontal arrangement defined by the above defined horizontal table plane.
  • the table is tilted out of the position wherein the saw blade cuts substantially perpendicular to the table plane.
  • one end of the table is brought closer to the saw blade and the opposite end of the table is brought farther away from the saw blade compared to when the table is in the horizontal plane.
  • the saw blade can intersect the table plane at an angle less than 90°.
  • the term “vertical plane” includes any plane, which the table can be tilted into and not being the “horizontal plane”.
  • the pivot axis of the lever pivot axle is not in the same plane as the table plane nor parallel to said plane, and the miter angle is obtained by tilting the table a "tilt angle".
  • the miter angle adjusting mechanism can expediently be operated to arrange the table in any of the above positions. It is e.g. possible first to arrange the table horizontal and turn the guideway into a set first miter angle, e.g. of about 45°, to cut a workpiece, such as a list, in two pieces at that set first miter angle. If the pieces need more processing by cutting, secondly, the miter angle adjusting mechanism can be switched to arrange the table in a vertical position where the rotation plane of the saw blade intersects the table plane at a set second miter angle, e.g. an acute angle of 30°, to e.g. provide the already cut tip of the list with a further cutting face. This way any imaginable choice and combination of miter angles can be achieved, and workpieces be designed and made with more than one cut face in consecutive process steps with minimum manipulation of the one and same miter saw.
  • a set first miter angle e.g. of about 45°
  • the miter angle adjusting mechanism can be switched to arrange the table in
  • the operator may chose to use a miter saw of the present invention adapted to just turn the table horizontally.
  • the operator can use another miter saw of the present invention adapted to just turn the table vertically.
  • a miter saw of the present invention provided with a miter angle adjusting mechanism that allows switching between a vertical cutting step and a horizontal cutting step however constitutes a very versatile power tool, and the operator needs not carry several tools along or erect stationary conventional miter saws side by side.
  • the hand-held miter saw of the present invention can be both used and adjusted at the work site with minimum manipulations and within few seconds.
  • a primary distinguishing feature of the miter saw according to the invention is that the saw blade is not turned nor tilted relative to the fence, thus not turned nor tilted relative to the guideway.
  • the miter saw advantageously may comprise a lower safety guard provided below the front part of the first lever to protect the operator from contact with the saw blade when the levers are operated. Because the miter saw is held by one hand and the other hand holds the workpiece the hands are not at risk of getting cut by the saw blade to any other degree than for conventional miter saws, but the lower safeguard shields the saw blade and prevents accidents such as cutting the leg. Even if the miter saw contacts a body part the lower safety guard prevents contact between the rotating saw blade and such other body part .
  • the front part of the first lever may have an elongate slit to guide and receive the saw blade at least at the end of the cut. So when the miter saw of the present invention is in a non-using mode, the gap between the levers are closed, thus the first lever and the second lever are in a position closest to flush, and the saw blade is made inaccessible to accidental cuts by being located inside the elongate slit of the front part of the first lever.
  • the lower safety guard may be connected to the table to turn together with the table. So when the workpiece is to be given a crosswise cut the miter angle can be set by loosening the first adjuster component, turning the table, which is joined in the horizontal position to the safety guard, the desired miter angle and tightening the first adjuster component again.
  • the first adjuster component can e.g. be a first screw component, first tightening screw or a clamping component.
  • the lower safety guard is bowl-shaped or dome-shaped. This shape conveniently substantially follows the curvature of a body of revolution of the saw blade.
  • the radius of the bowl-shaped lower safety guard is larger than the radius of the saw blade to leave at least a small clearance that allows the lower safety guard to turn and/or tilt without touching the saw blade.
  • the miter angle adjusting means of the hand-held miter saw according to the present invention may have a second adjuster component for enabling the tilting of the table about a tilting axis parallel to or in the rotation plane of the saw blade.
  • the second adjuster component can e.g. be a second screw component, second tightening screw or a clamping component.
  • the lower safety guard may conveniently have first opposite openings or cut-out sections that allow passage of the table when tilted.
  • first opposite openings or cut-out sections that allow passage of the table when tilted.
  • the upper edge of the lower safety guard does not bar the table from being tilted vertically at the first opposite openings, as well as the first opposite openings or cut-out sections allows tilting of the table into highly acute angles without other components of the miter saw are in the way for the tilting.
  • the first opposite openings serve to help guiding the table into vertical positions and serve as a further means to prevent the lowest table end from moving sideways once the table has been locked by the second adjuster component in the selected miter angle.
  • the lower safety guard can have any of a guide groove, a slot, or spaced apart stops to delimit and define the maximum possible horizontal clockwise and counter-clockwise turning angle of the table.
  • a guide groove or slot may serve for receiving the front part of the first lever.
  • the guide groove or slot when the front part hits the end of the guide groove the table cannot be turned further, so in this case it is the length of said guide groove or slot that defines the maximum possible horizontal turning angle of the table to both sides to set the miter angle.
  • the guide groove or slot also can serve to keep the front part from moving up and down .
  • the table may comprise an annular frame that supports the table.
  • the frame may be a ring-shaped body arranged congruent with the upper edge of the lower safety guard, which frame may have two table parts with respective guideways disposed diametrically opposite each other to allow the front part and the saw blade to be located, operated and protected in between these opposite table parts.
  • the two spaced apart table parts provide the sufficient free space for unobstructed passage of the severing saw blade which allows a full miter cut through the workpiece to divide it into two separate pieces.
  • the second adjuster component is a second tightening screw having a threaded shaft and a knob for fastening and loosening the second tightening screw.
  • the threaded shaft extends through the lower safety guard and into the front part of the first lever to allow the table to turn when the tightening screw is unscrewed and to set the table in a selected miter angle by tightening the second tightening screw .
  • the miter angle adjusting mechanism of the miter saw may be configured as a separate tilting device for vertical tilting of the table or as a combined device for vertical tilting of the table and horizontal turning of the table.
  • the miter angle adjusting mechanism may be configured to set the miter angle in predetermined fixed miter angles, or be configured to set an arbitrary miter angle. Precise one-degree incremental changes to the miter index and the miter angle is possible but the miter angle may also be controlled by stops that allows the miter index and the miter angle to be quickly set to common angles, such as 15°, 22.5°, 30°, and 45°, which angles are common for many structures assembled of lists and rods into e.g. a square design or other polygonal design.
  • the possibility of cutting at an arbitrary miter angle is however very beneficial in e.g. old houses where old wood has warped, and where if can be difficult to obtain a nice fit between two lists at a skew corner.
  • the pivot axle of the levers and the table can be placed at such a distance from the axis of the circular saw blade that the pivot axle is always out of reach of the saw blade for thereby securing an unobstructed operation of the miter saw.
  • the zero position of the table is where the guideway forms an angle of zero degrees with the axis of rotation of the saw blade .
  • An upper safety guard may be placed on the cutter head close to at least one side of the circular saw blade. Thereby is advantageously achieved that the operator is guarded from contacting the teeth of the rotating saw blade from above when operating the miter saw.
  • the first lever can be equipped with a protruding arm connected to the arm of the cutter head with a first pivot.
  • a first toggle lever of a toggle joint may simultaneously be connected to the arm of the cutter head with a second pivot placed closer to the cutter head than the first pivot while the second toggle lever of the toggle joint is connected to the lever pivot axle of the bearing .
  • the saw blade in its start position can have such a distance to the underlying table that a workpiece with a predetermined large thickness can be cut even if the angle between the first and second lever is relatively small and that the saw blade during operation anyhow can be advanced through the workpiece with a suitable power and rate of motion.
  • the circular saw blade can according to the invention be rotated by means of an electric motor mounted on the cutter head with its axis of rotation placed parallel with and at a distance from the spindle of the circular saw blade whereby the electric motor advantageously can be supplied with current via an electric circuit in which an electric battery on e.g. the miter saw is inserted. Rotating of the circular saw blade can advantageously be carried out via a toothed gearing.
  • the saw can be controlled by means of two or more switches associated with the electric circuit so that the miter saw only can run when the operator actually activates the switches.
  • the electric motor can be a brake motor so that when the motor stops the rotation of the saw blade stops immediately as soon as at least one of the switches is deactivated. The saw blade therefore is without any danger for the operator when performing the cutting operation.
  • the miter saw can be used by performing the following steps:
  • Fig. 1 shows a hand-held miter saw according to the invention seen from the side
  • Fig. 2 is a longitudinal sectional view of the miter saw seen in fig. 1,
  • Fig. 3 is a perspective front view of a miter saw with open levers
  • Fig. 4 shows the same with closed levers
  • Fig. 5 shows planes and axis of the miter saw in horizontal mode
  • Fig. 6 and 7 are exploded perspective views of the table and the lower safety guard seen from the front and slightly from above, respectively,
  • Fig. 8 shows the same in assembled state seen slightly from above
  • Fig. 9 is a perspective side view of the miter saw table in the horizontal mode turned a miter angle, and illustrating the mutual relationship between planes and axis when the miter angle is chosen by turning the table, Fig. 10 shows the same from the opposite side but with the table turned in the opposite direction,
  • Fig. 11 is a perspective side view of the miter saw in the vertical mode tilted a miter angle and illustrating mutual relationship between planes and axis, and
  • Fig. 12 is a front view of the same.
  • the main components of the miter saw 1 are a first lever 2 pivotable connected to a second lever 3 at a pivot axle 4 to function as a tong or a scissors.
  • the first lever 2 has a first handle 5 that extends into a front part 6.
  • the front part 6 protrudes beyond and through a table 7, as seen best in figs. 3 and 4.
  • the second lever 3 has a second handle 8 that extends into the cutter head 9 with the motor 10 that drives the rotating saw blade 11.
  • the motor 10 receives electric power from a battery 12 mounted on the second handle 8.
  • the battery 12 is preferably detachable and chargeable.
  • the battery 12 also provides power to an electric circuit (not shown) that controls at least a first handle switch 13 on the first handle 5 and a second handle switch 14 on the second handle 8.
  • the table 7 has two separate table parts 7a, 7b, and each table part 7a, 7b has a separate table switch 15a, 15b that also are powered by the battery 12 and controlled by the electric circuit .
  • the operator grasps the first handle 5 and the second handle 8 by e.g. the right hand. Then he/she places a workpiece (not shown) on the table 7 using his/her left hand, holds onto the workpiece with the left hands fingers and moves the first handle 5 and the second handle 8 towards each other so that the saw blade 11 contacts the workpiece.
  • the first handle switch 13 and the second handle switch 14 is then activated with the right hands fingers or palm, and the accessible table switch 15a or 15b is activated with the left hand, e.g. with the thumb, when convenient to start the rotation of the saw blade 11 to cut the workpiece in two.
  • the saw blade 11 can rotate. Once the cutting is done all finger or hand contact with the switches 13 , 14 , 15a, 15b are released. The rotation of the saw blade 11 stops immediately. When the right hand loosens its closing grip at the handles 5,8 the cutter head 9 is lifted free of the table 7 again, and the miter saw 1 is ready for a new cutting operation. Electric wiring and connections between battery 12, motor 10 and switches 13, 14, 15a, 15b are not shown in the drawing. The circuit can be accommodated in any available space or cavity of the miter saw 1, and appropriate wiring be more or less hidden behind exterior shell parts and/or be guided by such .
  • a lower safety guard 16 is connected to the bottom of the front part 6 of the first lever 2 by means of a first adjuster component 17 of a miter angle adjusting mechanism 18.
  • the lower safety guard 16 effectively prevents unintentional contact with the lowered rotating or not rotating saw blade 11.
  • the lower safety guard 16 has diametrically opposite wall openings 19a, 19b that fit the width of the table parts 7a, 7b when the table 7 is tilted.
  • the table parts 7a, 7b are disposed diametrically opposite each other on an annular ring-shaped frame 20, and positioned and spaced apart on this annular ring- shaped frame 20 to pass into the wall openings 19a, 19b in the wall 21 of the lower safety guide 16.
  • the table parts 7a, 7b have respective upright fence parts 22a, 22b that also serve as respective convenient guideways for the workpiece held on the table 7 when cutting takes place.
  • the first adjuster component 17 is in the present exemplary embodiment a first tightening screw 23 having a spring-biased 24 threaded shaft 25 screwed into the front part 6 of the first lever 2 from below the lower safety guard 16.
  • a first head 26 in form of a knob of the first tightening screw 23 serve to screw the lower safety guard more or less tight together with the front part 6 of said first lever to prevent mutual unintentional rotation of table 7 in relation to the front part 6 when the miter angle is fixed in the horizontal table plane H, as will be more clear from the subsequent figures.
  • the second adjuster component 27 of the miter angle adjusting mechanism 18 comprises a first upright web 28 on the upper edge 29 of the lower safety guard 16 above the front part 6 of the first lever 2, which front part 6 protrudes and spans above the top opening of the lower safety guard 16 and has a free end 30 facing towards the interior wall 31 of said safety guard 16, optionally to help control and guide turning of the table 7.
  • the annular frame 20 with the table 7 has a second upright web 32 aligned with the first upright web 28.
  • a second tightening screw 34 of the second adjuster component 27 serves to lock the table 7 in the selected vertically tilted angle.
  • a gasket, O-ring 35 or other resilient member between e.g. the second tightening screw 34 and the first upright web 28 may provide a resilient, firm securing of the table 7 in tilted miter angle when tightening the second tightening screw 34.
  • Further resilient members may be used on any axle, as well as the second adjuster component 27 also can be spring-biased. Diametrically opposite the first table pivot 33a the annular ring-shaped frame 20 is pivotally connected at the upper edge
  • the miter saw 1 comprises a bearing 36 for the lever pivot axle 4 of the first lever 2 and the second lever 3.
  • the bearing 36 accommodates the lever pivot axle 4.
  • the first lever 2 and the second lever 3 serve like the levers of a tong to operate the miter saw 1 by means of a hand (not shown) of an operator (not shown) .
  • the lever pivot axle 4 may have a spring-biased arresting knob 37, which arresting knob 37 has a lock pin 38 engaging a lock groove 39 on the front part 6 when the miter saw 1 is not used.
  • the bearing 36 may be realized by a forged bearing end of the front part 6 opposite the free end 30 of said front part 6. The forged bearing end may extend into the first handle.
  • the bearing 36 may be realized by a hole 40 in the first lever 2 at the transition between the front part 6 and the first handle 5.
  • the lever pivot axle 4 is mounted traverse in the hole 40 and spans the hole 40.
  • the transition between the second handle 8 and the cutter head 9 of the second lever 3 is arranged pivotally about the pivot axle 4 in the hole 40.
  • Alternative ways of making the first lever 2 and the second lever 3 pivotable in relation to each other are contemplated within the scope of the present invention.
  • the cutter head 9 has a protruding arm 41 to a.o. hold and operate the cutter head.
  • the protruding arm 41 is pivotally moveable up and down towards the table 7a, 7b by means of a toggle mechanism 42.
  • the table 7 may in addition be pivotally moveable up and down towards the cutter head 9 by means of a second toggle mechanism or a pivot 43 on the protruding arm 41.
  • the front part 6 of the first lever 2 has an elongate slit 44 below the saw blade 11 to receive said saw blade 11 at the end of a cut, and to allow the saw blade 11 to cut completely through the workpiece supported on the table parts 7a, 7b.
  • An upper safety guard 45 covers the upper part of the saw blade 11, optionally the upper safety guard 45 is part of the protruding arm 41, or is a shell part that also accommodates other parts of the miter saw, such as e.g. toggle mechanisms, gearing for rotation the saw blade, and motor.
  • the switches 13, 14, 15a, 15b are placed at a distance from the saw blade 11 so that the operator cannot reach the rotating saw blade 11 with his/hers hands when activating said switches with said hands.
  • the electric circuit may be adapted in such way that the current to the motor is switched on only when both of the switches are activated and switched off when at least one of the switches is deactivated.
  • fig. 3 the miter saw is seen at the beginning of a cut and in fig. 4 the miter saw is seen at the end of the cut, where the gap between the front part 6 and the protruding arm 41 has become closed and the lower part of the saw blade is located in the elongate slit 44 of the front part 6 of the first lever 2.
  • the table 7 is shown in a horizontal plane H.
  • Fig. 5 corresponds to fig. 3 but serves to illustrate the relevant axis and planes in the horizontal mode of the miter saw 1.
  • Other reference numbers have been left out for clarity purposes.
  • the table 7 has a horizontal table plane H
  • the saw blade 11 has a rotation plane S and a rotation axis R
  • the lever pivot axle 4 has a pivot axis P
  • the front part of the first lever 2 has an elongate axis L parallel with the elongate slot 44.
  • the miter angle is in fig. 1 set to zero degree and the attack angle ⁇ of the saw blade 11 on the workpiece is defined by the intersection angle between the rotation plane S and the table plane H, which in the horizontal mode is substantially perpendicular.
  • Figs. 6 and 7 are perspective, exploded views of the lower safety guard 16 and the table 7 with its opposite table parts 7a, 7b positioned on the annular ring-shaped frame 20 above the openings 19a, 19b in the lower safety guard 16.
  • Fig. 8 shows the same in assembled state.
  • the lower safety guard 16 has a guide groove 46 for receiving the front part 6 of the first lever 2.
  • the guide groove 46 allows the lower safety guard 16 with the table 7 to be moved laterally but not vertically until the front part 6 of the first lever hits on one of the ends of the guide groove 46, depending on whether the table is turned clockwise or counter clockwise, thus to turn the table into different horizontal miter angles a .
  • the table pivots 33a, 33b define a tilting axis T for tilting the table 7 into any desired vertical plane V, as seen in figs. 10 and 11.
  • the tilting axis T is parallel to the longitudinal axis L of the front part 6 of the first lever 2.
  • the second adjuster component 27 of the miter angle adjusting mechanism 18 serves on the one hand to adjust the table 7 vertically, and on the other hand to lock the table 7 and the lower safety guard 16 together when the table 7 is to be turned in the horizontal plane H.
  • the second adjuster component 27 is realized by aligning the protruding first upright web 28 of the lower safety guard 16 and the second upright protruding web 32, and screwing them pivotally together by means of the second tightening screw 34.
  • the second tightening screw 34 has a shaft 49 passing through shaft hole 50 in the second upright protruding web 32 and having a tip positioned in bend guide slot 51 in the protruding first upright web 28.
  • the curvature of the bend guide slot 51 defines and controls the curvature of the vertical tilting.
  • a spacer 52 protrudes radially from the second upright protruding web 32 to keep the protruding first upright web 28 and the protruding second upright web 32 substantially parallel when tilting takes place.
  • a head 53 on the shaft 49 of the second tightening screw 34 serves for tightening and loosening the tension between the protruding first upright web 28 and the protruding second upright web 32 when the table 7 is tilted in the vertical mode to secure the desired tilted miter angle.
  • a resilient first stop plug 54 is mounted through an index hole 55 in the spacer 52. The first stop plug 54 fits to engage one or more first stop holes 56 provided spaced apart on the second upright protruding web 32 when tilting the table 7, and to guide the table 7 during the vertical tilting movements towards selected common miter angles.
  • first stops holes 56 are seen, where the center first stop hole 56 is the first stop hole used for fixing the table 7 to the lower safety guard 16 when the miter saw 1 is to be used and turned, locked together by means of the second tightening screw 34, in the horizontal mode.
  • Screw holes 57 in the table parts 7a, 7b serve to mount housings 58a, 58b for the table switches 15a, 15b.
  • the first adjuster component 17 is more clearly understood from figs. 6 and 7 seen together.
  • the bottom wall 59 of the lower safety guard 16 has a bottom hole 60, through which the spring-biased threaded shaft 25 of the first tightening screw 23 is screwed together with the front part 6 of the first lever 2 from below. When the first tightening screw 23 is firmly tightened the position of the table 7 in the horizontal mode is secured.
  • first adjuster component 27 some common miter angles can be indexed by an a resilient second stop plug (not shown) provided at the lower side of the front part 6 of the first lever 2 to engage second plug holes 61 at the bottom wall of the lower safety guard 16.
  • Figs. 9 and 10 show an open miter saw 1 in the horizontal mode turned a miter angle and illustrating that the rotation plane S of the saw blade 11 attacks the table plane H of the table 7 at right angles irrespective of the orientation of the miter saw 1 and how it is held itself in space.
  • the miter angle is obtained by turning the table parts 7a, 7b, locked to the lower safety guard 16, in the horizontal plane H inside the openings 19a, 19b into an angle in relation to the longitudinal axis L of the front part 6 of the first lever, whereby the table 7 also is turned in relation to the rotation axis R of the saw blade 11.
  • the first step of setting a horizontal miter angle it to ensure that the second adjuster component 27 firmly locks the table 7 and the lower safety guard 16 together in a horizontal plane H, this way bringing the table 7 in its horizontal mode.
  • the first adjuster component 17 can be operated.
  • Figs. 11 and 12 show an open miter saw 1 in the vertical mode and tilted a miter angle a. Contrary to the horizontal mode the attack angle from the saw blade 11 on the table 7 is not perpendicular but the attack angle is also the miter angle irrespective of the orientation of the miter saw 1 and how it is held itself in space.
  • the miter angle is obtained by tilting the table parts 7a, 7b from the horizontal plane H into the vertical plane V inside the openings 19a, 19b. In this vertical position the table 7 is at a tilt angle in relation to the longitudinal axis L of front part 6 and tilted in relation to the rotation axis R of the saw blade 11.
  • the first step of setting a vertical miter angle it to ensure that the first tightening screw 23 of the first adjuster component 17 is completely tightened so that the table 7 cannot turn in the horizontal plane H.
  • the second adjuster component 27 can be operated.
  • First the second tightening screw 34 is loosened to allow the table parts 7a, 7b to tilt in relation to the lower safety guard 16 until the desired miter angle is set.
  • the bottom edge of the openings 19a, 19b defines the maximum tilt angle and thus the maximum miter angle in the vertical mode.
  • the second tightening screw 34 is then fastened again. Now the levers 2,3 of the miter saw 1 can be moved towards each other to make the cut in the workpiece (not shown) while holding on to the different switches.
  • the means for rotation of the saw blade is generally known and features such as gearings and spindle are not elaborated.
  • the maneuverable guideway can be adjusted in any imaginable angle including horizontal but also in vertical angles by means of the same guideway.
  • the adjustable guideway can also be locked in fixed selected positional degrees but also in any other degrees by manual locking.
  • the adjustable guideway can have a separate horizontal tilting-turning device, and a separate vertical tilting-turning device or a combined tilting- turning device. So the present application specifies that the table of the miter saw can be set at an angle which is vertical as well as horizontal, or that a miter saw can be made with either a vertically pivotably or horizontally pivotably table.
  • a hand-held miter saw is useful as a list cutter and is formed as a tong which cut using a rotating electrically driven saw blade, and which can be operated by one hand, while the other hand is holding the workpiece, such as a list, to be cut in a predetermined desired angle, which angle is set by means of the list cutter's adjustable table and guideway.
  • the list cutter of the present invention can be tilted vertically as the fixed miter saw.

Landscapes

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

Abstract

Selon l'invention, une scie à onglets à main (1) comprend une lame de scie (11) définissant un plan de rotation (R), une table (7 ; 7a, 7b) définissant un plan de table (H, V), une rainure de guidage située sur la table (7 ; 7a, 7b) permettant de maîtriser la position d'une pièce de travail pendant la coupe, ledit plan de table (H, V) étant en intersection avec le plan de rotation (R), un premier levier (2) qui comporte une première poignée (5) s'étendant dans une partie avant opposée (6), un deuxième levier (3) raccordé en pivotement au premier levier (2) par un axe de pivotement de levier (4), ledit premier levier (2) fait pivoter la table (7 ; 7a, 7b) et ledit deuxième levier (3) fait pivoter la lame de scie (11) entre un mode de démarrage dans lequel la lame de scie (11) n'est pas associée à la table (7 ; 7a, 7b) et un mode de coupe où la lame de scie (11) est déplacée vers la table (7 ; 7a, 7b) pour effectuer une coupe au travers de la pièce de travail. La scie à onglets (1) comporte un mécanisme de réglage d'angle d'onglet (18) conçu pour incliner la table (7 ; 7a, 7b) par rapport au plan de rotation (R) de la lame de scie (11).
PCT/DK2015/050227 2014-08-01 2015-07-27 Scie à onglets à main WO2016015733A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DKPA201400433 2014-08-01
DKPA201400433 2014-08-01
DKPA201570439 2015-07-03
DKPA201570439 2015-07-03

Publications (1)

Publication Number Publication Date
WO2016015733A1 true WO2016015733A1 (fr) 2016-02-04

Family

ID=54062595

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2015/050227 WO2016015733A1 (fr) 2014-08-01 2015-07-27 Scie à onglets à main

Country Status (1)

Country Link
WO (1) WO2016015733A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI577475B (zh) * 2016-07-15 2017-04-11 力山工業股份有限公司 具有安全裝置的可折收鋸切機及鋸切機的安全收折方法
CN110961723A (zh) * 2019-11-25 2020-04-07 东台市高科技术创业园有限公司 一种电子器件加工用转向切割设备
TWI745199B (zh) * 2020-12-21 2021-11-01 力山工業股份有限公司 具安全裝置的可收合鋸切機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2204252A1 (fr) * 2008-12-31 2010-07-07 Techtronic Power Tools Technology Limited Outil électrique portable
WO2014086376A2 (fr) * 2012-12-06 2014-06-12 Silas List Cutter Aps Scie à onglets portable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2204252A1 (fr) * 2008-12-31 2010-07-07 Techtronic Power Tools Technology Limited Outil électrique portable
WO2014086376A2 (fr) * 2012-12-06 2014-06-12 Silas List Cutter Aps Scie à onglets portable

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI577475B (zh) * 2016-07-15 2017-04-11 力山工業股份有限公司 具有安全裝置的可折收鋸切機及鋸切機的安全收折方法
CN110961723A (zh) * 2019-11-25 2020-04-07 东台市高科技术创业园有限公司 一种电子器件加工用转向切割设备
CN110961723B (zh) * 2019-11-25 2021-03-09 东台市高科技术创业园有限公司 一种电子器件加工用转向切割设备
TWI745199B (zh) * 2020-12-21 2021-11-01 力山工業股份有限公司 具安全裝置的可收合鋸切機

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