CN100384577C

CN100384577C - Flip over saw

Info

Publication number: CN100384577C
Application number: CNB2005100850825A
Authority: CN
Inventors: 伊藤胜康; 宇津野敦士
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2004-08-04
Filing date: 2005-07-20
Publication date: 2008-04-30
Anticipated expiration: 2025-07-20
Also published as: EP1623802A1; JP2006044070A; CN1733406A; DE202005021523U1; EP1623802B1; ATE410278T1; DE602005010158D1

Abstract

A flip over saw which prevents an accidental rotation of a table (3) while facilitating the rotating operation is provided. In a flip over saw (1), a motor (13) is located adjacent to the upper side of the rotating shafts (5, 5) of the table (3) with the main body (11) being at the top dead center in a miter saw mode where the main body (11) is positioned above the table (3). More specifically, when the main body (11) is at the top dead center, the center O1 of the motor (13) is positioned at the area slightly forward from the vertical surface S penetrating the center of axle 0 of the rotating shafts (5, 5) of the table (3). Then, the horizontal distance H between the center O1 and the vertical surface S is set to be smaller.

Description

Flip over saw

Technical field

The present invention relates to flip over saw, described flip over saw can be used as mitre saw and bench saw uses.The saw body of described flip over saw has the saw blade that is driven in rotation, its stage support the saw body that can move up and down and have saw blade, turning 180 ° of ground are supporting this workbench on pedestal, and make the operating position of saw body above being in, flip over saw uses as mitre saw, make saw body be in below and operating position that saw blade is highlighted from workbench, this flip over saw then uses as bench saw.

Background technology

The structure of flip over saw is: on the pedestal of square shape, middle part with workbench is that fulcrum comes the horizontal supporting workbench, and can make 180 ° of working platform overturnings by this fulcrum, no matter can be towards the top with stationary table with in two surfaces of workbench which, the saw body that will have the saw blade that rotates by Motor Drive hinged at workbench a side and make this saw body about state that can move up and down, and when workbench is in saw body and is the position of top, to be placed on the workbench by sawed-off material, saw body is descended and to being undertaken sawed-off by sawed-off material, thereby flip over saw is used as mitre saw, run through workbench and saw body is fixed on the workbench at saw blade at the bottom dead centre state that downside highlights, and when keeping this state and make workbench be in the position of saw body below being, if make by sawed-off material with respect to exposing that saw blade on workbench slides and will be sawed-off, then flip over saw be used as bench saw by sawed-off material.Record and narrate to some extent in patent documentation 1 (referring to No. 5787779 specification of United States Patent (USP)) as such flip over saw.

Summary of the invention

In above-mentioned flip over saw, under the mitre saw state, the heavier motor of weight is positioned at leaning on the position of rear end of workbench.Therefore, the balance of workbench is bad, and workbench becomes the state of easy rotation, and the rotation of the workbench that causes because of maloperation damages workbench and saw body probably.In addition, because the center of gravity of workbench is away from the center of rotation of workbench, so the centrifugal force when making working platform overturning is bigger, thereby the turning operation of workbench difficulty relatively, and also cause operability to descend.

Therefore, the objective of the invention is to, provide a kind of and can prevent that occurrent workbench from rotating, and when working platform overturning, can also guarantee the flip over saw of good operability.

To achieve these goals, flip over saw of the present invention is, at saw body is the operating position of upside, be positioned at saw body under the state of top dead-centre, with motor configurations near above the center of rotation that is positioned at workbench, carrying out on the direction that the front side that makes above-mentioned workbench takeoffs upward from the mitre saw state to the flip over saw of bench saw state turnover, in order more effectively to prevent from the rotation of the occurrent workbench of mitre saw state, the upper dead center position of the saw body under the mitre saw state, make the place ahead of the center of rotation that is centered close to workbench of motor, saw body can be hinged on supporting arm with saw body rotationally up and down by bolster, better in order to make from the operability of mitre saw state when the bench saw state turnover workbench, saw body lower dead point position under the mitre saw state will be set shortlyer than the distance of the center of rotation from the workbench center of rotation to bolster to the distance at the center of motor from the center of rotation of workbench.

In addition, in the present invention, near the top of so-called center of rotation, comprise certainly motor be centered close to center of rotation directly over situation, but also comprise directly over this position forwards with stagger slightly some situation of rear.

According to flip over saw of the present invention, because under the mitre saw state, workbench obtains the good supporting of balance, so, even workbench is fixing because of maloperation is disengaged, workbench can not overturn yet, thereby prevents the workbench that causes because of occurrent rotation or the damage of saw body.In addition, because the center of gravity of workbench near center of rotation, so can carry out the rotating operation of workbench like a cork, has also improved operability simultaneously.

Because the front side at workbench is carried out on the workbench of the operation of takeofing upward, the center of gravity of motor is positioned near on the position in the place ahead, so, will prevent more effectively that workbench is from the occurrent rotation of mitre saw state.

Because motor is nearer from the center of rotation of workbench,, and can make working platform overturning simply with less power so the rotary inertia that produces during working platform overturning is less.Therefore, workbench improves from the operability of mitre saw state when the bench saw state turnover.

Description of drawings

Fig. 1 is the overall diagram (mitre saw state) of flip over saw.

Fig. 2 is the vertical view of flip over saw.

Fig. 3 is the key diagram that is illustrated in the lock-out state of bottom dead centre.

Fig. 4 is the key diagram of expression bench saw state.

Fig. 5 is the key diagram of the position relation between expression motor and the turning cylinder.

The specific embodiment

Embodiments of the present invention are described below with reference to the accompanying drawings.

Fig. 1 is the overall diagram of expression one of flip over saw example, and Fig. 2 is its vertical view, flip over saw 1 by as the pedestal 2 of the platform of planar rectangular shape, be arranged on the workbench 3 on pedestal 2 tops, the saw blade unit 4 that is arranged on the workbench 3 constitutes.Workbench 3 can be that 180 ° of ground of upset, center are supported on the pedestal 2 with the turning

cylinder

5,5 of left and right directions (is the place ahead with the right side among Fig. 1,2), and be upper surface with which surface in two surfaces of workbench 3 no matter, workbench 3 can be fixed on level by stop component 6.In addition, on workbench 3, be provided with circular horizontally rotate turn to workbench 7, and set up the fence 8 that leads abreast with turning

cylinder

5,5 with the form that turns to workbench 7 across this.

Saw blade unit 4 has supporting arm 9 and saw body 11, supporting arm 9 is by the upright rear that turns to workbench 7 that is located at, upper end at this supporting arm 9, supporting the saw body 11 that can move up and down by bolster 10, the left side side as the saw blade cover 12 of housing at saw body 11 is provided with motor 13 and handle 14, is provided with by motor 13 in the inside of saw blade cover 12 to drive and the discoid saw blade 15 of rotation.In addition, saw body 11 is loaded to the top dead-centre of Fig. 1 by the not shown torque spring that is arranged on the bolster 10, and control and keep handle 14 and it is pushed downwards, as shown in Figure 3, make saw body 11 drop to the bottom dead centre that saw blade 15 passes the not shown slit that is arranged on the central authorities that turn to workbench 7, by the rotation saw blade 15 can sawed-offly turn on the workbench 7 by sawed-off material.Aforesaid is the state that flip over saw uses as mitre saw.Label 16 is safety guards, and at the top dead-centre of saw body 11, it is positioned at the position that covers saw blade 15, and rotates along with the decline of saw body 11, and saw blade 15 is exposed.

In addition, supporting arm 9 is turning on the workbench 7 and can topple over to right-hand (below of Fig. 2) together with saw body 11, and can be fixed on arbitrary dump position by action bars 17, thus, can make saw blade 15 become different angles with vertical direction.By toppling over this saw body 11, can be tilted sawed-off by sawed-off material on the workbench 7 to turning to.In addition, carry out rotating operation, turn to workbench 7 to horizontally rotate with saw body 11 by gripping handle 14.By selecting this angle that horizontally rotates that turns to workbench 7, can carry out saw blade 15 and the right cutting of fence 8 quadratures that lead and sawed-off from this angle that is in the enterprising line tilt of horizontal direction.

On the other hand, saw body 11 can be fixed on the bottom dead centre of Fig. 3 by fixed mechanism 18, this fixed mechanism 18 is set between supporting arm 9 and the saw body 11, and as long as under this stationary state, make workbench 3 upsets, as shown in Figure 4, just can be used as bench saw and use, promptly, saw blade 15 is highlighted to the top of workbench 3, and on workbench 3, make and slided by sawed-off material and carry out sawed-off.

At this moment, from as the axle center O of the turning cylinder 5 of the center of rotation of workbench 3 distance L 1, set for shorter to the distance L 2 of the center O 2 of bolster 10 than center O from turning cylinder 5 to the center O 1 of motor 13.

Here, since the turning

cylinder

5,5 of workbench 3 be set under the mitre saw state workbench 3 above, so, on Fig. 1～first turned position (mitre saw state) shown in Figure 3 and second turned position (bench saw state) shown in Figure 4, the height of workbench 3 dissimilate (bench saw one side becomes higher).In addition, in order to allow the rotation of workbench 3, on the peristome 19 that forms along fore-and-aft direction of pedestal 2 central authorities, and be provided with a pair of first

stop rubber parts

20,20 on the front side of the inner edge about it highlightedly, they are at the lower surface of the first turned position supporting table 3; On the other hand, at the rear side of its left and right sides inner edge, be provided with a pair of second

stop rubber parts

21,21 highlightedly above the workbench 3 of first turned position, they are at the lower surface of the second turned position supporting table 3.

Thus, with workbench 3 when the mitre saw state switches to the bench saw state, its front side only can be rotated on the direction of takeofing upward (Fig. 3 direction of arrow), when the bench saw state switches to the mitre saw state, its rear side only can be rotated on the direction of takeofing upward (direction of arrow of Fig. 4).In addition, because turning

cylinder

5,5 is not the center of the fore-and-aft direction of workbench 3, but on the position that is configured under the state of first turned position after leaning on slightly, so, when the mitre saw state switches to the bench saw state, workbench 3 can not interfere with the first

stop rubber parts

20,20.

And, as shown in Figure 5, in flip over saw 1, the operating position of the mitre saw above saw body 11 is, and be positioned at saw body 11 under the state of top dead-centre, motor 13 is configured near the top of the turning

cylinder

5,5 that is positioned at workbench 3.In the present embodiment, be meant near the so-called top: at the upper dead center position of saw body 11, center O 1 with motor 13, be set in than on the forward slightly position of vertical the S of the axle center O of the turning

cylinder

5,5 by workbench 3, and the distance H of the horizontal direction between center O 1 and vertical the S is diminished.

In the flip over saw 1 that constitutes as mentioned above, at first, when using, as Fig. 1～shown in Figure 3, under the state above being, with stop mechanism 6 stationary work-tables 3 with saw blade unit 4 as mitre saw.As long as gripping handle 14 rotates saw blade 15 on one side under this state, saw body 11 is descended, just can sawed-offly be arranged on turn on the workbench 7 by sawed-off material, and the inclination by saw body 11 is rotated and is turned to horizontally rotating of workbench 7, can tilt sawed-off respectively and angle sawed-off.

Here, because the center of gravity of saw body 11 is positioned near the substantial middle (turning cylinder 5) of the fore-and-aft direction of workbench 3 because of the set positions of motor 13, so,, do not have the workbench 3 accidental danger that rotate even stop mechanism 6 is disengaged because of maloperation etc. yet.

And, when state uses to the switching of bench saw state and as bench saw thus, as long as make saw body 11 drop to bottom dead centre, with fixed mechanism 18 that saw body 11 is fixing then, and under this state, stop mechanism 6 is removed operation, make workbench 3 rotate 180 ° on the direction that is upwards takeoff in its place ahead, workbench 3 just stops on the upturned position of its butt second stop rubber parts 21,21.Equally, when the bench saw state switches to the mitre saw state, as long as make workbench 3 rotate 180 ° making on the direction of takeofing above the direction thereafter, workbench 3 just stops on the upturned position of its butt first stop rubber parts 20,20.When carrying out the turning operation of these states, because motor 13 is on the basis of above-mentioned set positions, also because of saw body 11 fixing at bottom dead centre more near turning cylinder 5, so, the rotary inertia that produces during upset is less, and can make working platform overturning simply with lighter power.

Like this, revolve the flip over saw 1 of mode according to above-mentioned reality, because the position of the workbench 3 above saw body 11 is, and be positioned at saw body 11 under the state of top dead-centre, motor 13 is configured near the top of the center of rotation that is positioned at workbench 3, so under the state of mitre saw, workbench 3 has obtained the good supporting of balance.Therefore, even stop mechanism 6 is because of maloperation is disengaged, workbench 3 can not overturn yet, thereby has prevented the workbench 3 that causes because of occurrent rotation and the damage of saw body 11.In addition, because center of gravity is near center of rotation, so, can carry out the rotating operation of workbench 3 like a cork, and also improve operability.

In addition, upper dead center position at the saw body 11 of mitre saw state, owing to make the center O 1 of motor 13 be positioned at the place ahead of the center of rotation O of workbench 3, so, the center of gravity of motor is positioned near on the position in the place ahead, thus with more effective workbench 3 that prevented from the occurrent rotation of mitre saw state.

On the other hand, lower dead point position at the saw body 11 of mitre saw state, owing to made distance be shorter than from center of rotation O to bolster the distance of 10 center O 2 from the center of rotation O of workbench 3 to the center O 1 of motor 13, so, the centrifugal force that produces when workbench 3 upsets is less, and can make workbench 3 upsets simply with lighter power.Therefore, workbench 3 improves from the operability of mitre saw state when the bench saw state turnover.

In addition, it is such that the position of motor is not limited to above-mentioned embodiment, is configured in the front side more forward than turning cylinder, also can be configured in the rear side after leaning on than turning cylinder, and also can make motor be centered close to turning cylinder directly over.In addition, the direction that is provided with of motor also is not limited to above-mentioned embodiment like that for left and right directions, in the front and back, edge or above-below direction when being provided with, by motor being arranged near the top of center of rotation the operability in the time of also can obtaining good balance and upset.

In addition, the structure of flip over saw itself also is not limited to above-mentioned embodiment, the saw body two directions rotation of can tilting to the left and right, and the structure sawed-off or that angle is sawed-off that perhaps can not tilt on the contrary also is suitable for the present invention.

Claims

1. flip over saw, workbench, saw body and fixed mechanism with pedestal, level, the stage support of described level and can be overturn 180 ° on this pedestal on this pedestal; Described saw body has the saw blade that rotated by Motor Drive and is bearing on the supporting arm in the mode that can move up and down, and described supporting arm is arranged on the face side of above-mentioned workbench; Described fixed mechanism is arranged between this saw trisome and the above-mentioned supporting arm, and can fix above-mentioned saw body at the bottom dead centre that above-mentioned saw blade runs through the above-mentioned saw trisome of above-mentioned workbench,

Be in the turned position that above-mentioned saw body is a upside at above-mentioned workbench, by the step-down operation of above-mentioned saw body use above-mentioned saw blade come on the sawed-off above-mentioned workbench by sawed-off material, thereby this flip over saw uses as mitre saw; On the other hand, be fixed under the state of bottom dead centre by said fixing mechanism at above-mentioned saw body, and be in the turned position that above-mentioned saw body is a downside at above-mentioned workbench, above-mentioned saw blade exposes on this workbench after running through above-mentioned workbench, make and slided with respect to the above-mentioned saw blade that exposes by sawed-off material and carry out sawed-off, thereby this flip over saw uses as bench saw, it is characterized in that:

At described saw body is the position of the described workbench of upside, be positioned at described saw body under the state of top dead-centre, with described motor configurations near above the center of rotation that is positioned at described workbench;

On the direction that the front side that makes described workbench takeoffs upward, carry out workbench from the mitre saw state to the flip over saw of bench saw state turnover, the upper dead center position of the saw body under described mitre saw state makes the place ahead of the center of rotation that is centered close to workbench of motor;

Saw body by bolster carry out on the above-below direction hinged rotationally on supporting arm, the lower dead point position of the described saw body under the mitre saw state, distance that will be from the center of rotation of workbench to the center of motor is set shortlyer than the distance of the center of rotation from described workbench center of rotation to described bolster.