CN101888913A

CN101888913A - Table-top cutter

Info

Publication number: CN101888913A
Application number: CN2008801192961A
Authority: CN
Inventors: 小岛真也; 山村刚
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2007-12-06
Filing date: 2008-11-25
Publication date: 2010-11-17
Anticipated expiration: 2028-11-25
Also published as: CN101888913B; WO2009072410A1

Abstract

A table-top cutter having a rotation table supported by a base in a horizontally rotatable manner and also having a fence for positioning a material to be cut, the fence being supported at opposite ends thereof by the base so as to radially straddle over the rotation table. The positioning fence has increased supporting rigidity to eliminate deflection of the fence at the center thereof, and this solves problems of conventional products in which the center of the fence is prone to deflect due to the fence being supported only at opposite ends thereof in order to allow rotation of the rotation table. A center support section (22a) is provided at the center of the span of the positioning fence (20). The center support section (22a) is extended to the lower surface of the rotation table (2) through a center recess (2d) of the table and connected to a rotation support section (30) of the base (3).As a result, supporting rigidity of the positioning fence (20) particularly at the center thereof is increased.

Description

Table saw

Technical field

The present invention relates to a kind of table saw, this table saw has as inferior working method, that is, the cutting machine body that rotary cutters such as circular saw blade are installed is moved down, thereby cuts material and carry out cutting processing being fixed on quilt on the workbench.

In this manual, about cutting processing, except the processing mode that processed material is separated, also comprise the processing etc. that processed material is separated but it is left grooving processing of otch and processed material is carried out grinding.

Background technology

This table saw has workbench and cutting machine body, and this workbench is used for thereon shelving on the surface is cut material, and the cutting machine body can carry out up or down move operation with respect to this workbench.About workbench, can adopt the version of rotary table, this rotary table is supported on the pedestal and can rotates in horizontal plane.If make rotary table rotate (horizontally rotating) in horizontal plane, then this cognition of cutting machine and rotary table are that the arc track at center moves horizontally to the left or to the right along the pivot with rotary table integratedly.On table saw with such rotary table, by this rotary table is rotated a certain angle in horizontal plane, thereby can make rotary cutter and the datum level of being cut material at an angle on vertical view, rotary cutter is cut material cutting (cutting sth. askew) to quilt obliquely under this state.

Above rotary table, be provided with qualification and cut the block of using the material position (fence).The butt of the datum level by being cut material and the material bearing surface of this block can limit this quilt and cut the position of material on rotary table.This positive stop is fixed on rotary table is rotated between the both sides of pedestal of supporting, thereby be supported with state across the rotary table top, for fear of touching between the upper surface of its bottom and rotary table (for allowing the spinning movement of rotary table), be provided with small gap at the two.

In the prior art, the various technology about this positive stop have disclosed in following document.

Patent documentation 1: Japanese patent of invention open communique spy open flat 7-47502 number

Patent documentation 2: real the opening clear 63-30101 number of the open communique of Japanese Utility Model

Yet there is following problem in the positive stop of prior art.Above-mentioned existing positive stop is following structure, promptly, positive stop be fixed on the pedestal that is positioned at rotary table left and right sides side both sides, be supported with state built on stilts above the pivot of this rotary table, therefore, the size of rotary table big more (maximization), the bearing stride of the built on stilts part of this positive stop is also big more, and its result causes, and has the size (increase wall thickness) that sufficient rigidity just needs to strengthen this positive stop in order to ensure this positive stop.If can not guarantee that positive stop has sufficient rigidity, then can be subjected to via rotation torque (cutting force) effect of being cut the rotary cutter that material passes over, be cut material position user and head on and cut material or reasons such as bump take place other article for limiting in the centre of the built on stilts part of positive stop, cause positive stop to produce deflection, also can make it produce distortion when situation is serious and occur can not pinpoint problem in the table plane direction.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of table saw, even the positive stop of this table saw has the supporting rigidity higher than prior art, thereby when the rotary table miniaturization, also can not produce the problem of deflection etc. as prior art.

For achieving the above object, the present invention adopts the table saw with structure that each claim (technical scheme) is put down in writing in claims.

If adopt the positive stop in the technical scheme 1 described table saw, both sides and central part at its length direction (workbench radially) are supported at position, three places altogether, so, compare with the supporting structure that only supports of prior art at position, two places, can eliminate or reduce positive stop greatly in the particularly deflection of central part of table plane direction, thereby the exact position that can keep being cut material for a long time.

If adopt the positive stop in the technical scheme 2 described table saws, bring obstruction can not for the spinning movement of rotary table, and the central part that will make somebody a mere figurehead part firmly is bearing on the pedestal.

If adopt the positive stop in the technical scheme 3 described table saws, when firmly being bearing in the span central part on the pedestal, can guarantee the supporting rigidity of rotary table.

If adopt the anglec of rotation indicating device in the technical scheme 4 described table saws, left-handed and dextrorotation for rotary table, have corresponding pointer and corresponding graduation mark respectively, so the graduation mark of using when graduation mark of using when can be with this left-handed and dextrorotation is overlay configuration (configuration side by side) on the workbench direction of rotation, thereby, when the indicating range of the anglec of rotation that guarantees rotary table is same as the prior art, can reduce angle index required space on the workbench direction of rotation on the pedestal greatly, therefore, do not need the user to make bigger posture change, can confirm the anglec of rotation of rotary table like a cork as the prior art.

General, this table saw has thereon shelves the workbench of being cut material on the surface, and the cutting machine body that can move up and down operation with respect to this workbench.The all kinds that this table saw can be useful on cutting metal or be used to cut timber, wherein the workbench of being cut material that is used for fixing of a part of cutting machine is the rotary table that can be bearing on the pedestal with horizontally rotating.If make rotary table horizontally rotate (rotating) in horizontal plane, then this cognitions of cutting machine and rotary table are that the arc track at center moves horizontally to the left or to the right along the pivot with rotary table integratedly.On table saw with such rotary table, by this rotary table is rotated a certain angle in horizontal plane, thereby can make rotary cutter when overlooking with the datum level of being cut material at an angle, rotary cutter is cut material cutting (cutting sth. askew) to quilt obliquely under this state.

At the upper surface of rotary table, for when carrying out cutting processing, can make rotary cutter enter (by), be provided with the through hole slot part that is called cutter seam.When overlooking, this cutter seam is by the rotation centerline of this rotary table.In addition, this table saw be provided be across the state above rotary table be used to limit the block of being cut the material position, the material bearing surface of this block connects with the datum level of being cut material.Therefore, making above-mentioned cutter seam is reference position (anglec of rotation is 0 °) perpendicular to the position of the rotary table of block material bearing surface.

About the reference position and the position of rotation of this rotary table, thereby can simply easily know by reading the angle index that is arranged on the pedestal around this rotary table.In the prior art, a pointer is set,, can knows the angle that rotary table rotates to the left or to the right from the reference position by reading the numerical value of the indicated angle index of this pointer in the rotary table side.Relevant prior art for example has disclosed at patent documentation 1,2.Especially, disclosure has such technology in patent documentation 2: represent to realize carrying out simply the purpose of unit conversion with two kinds of different scales of unit.

Yet,, have following problem about the angle index of prior art.Usually, on rotary table, cut material, be provided with the extension platform that roughly is cuboid that stretches out certain-length from rotary table one side direction user one side in order to be suitable for relatively large quilt.At this moment, at this rotary table upper surface (comprise and extend the platform upper surface) the cutter seam is set, the length direction of this cutter seam is radially consistent with rotary table, thereby can guarantee to have long cutter seam, thereby can cut large-scale quilt and cut material.Even with respect to pedestal, this extension platform also is the state that stretches out laterally.Therefore, the angle index that is positioned at base side is to be arranged at the downside that extends platform, this causes, thereby extending platform for the user becomes some angle index of obstacle and is difficult to see, so, the pointer that the reading angular scale of prior art is used is arranged at the position of being read by the user easily, for example should extend the left side of the extension base portion of platform.

In such prior art, because of for example disposing the pointer that the reading angular scale is used, the indicated angle index of position reading pointer of side so the user can keep left slightly in its front in the left side of extending platform.Thereby cause,,, essentially in the wider scope on every side of rotary table left side, angle index is being set in order to ensure the angular range that has to a certain degree about the angle index of the angular range that rotates to the left from the reference position of indication rotary table.If with pointer be configured in extend platform it seems it is the sidepiece on right side from the user, the angle index of expression right side angular range then need be set in the wider scope around the rotary table right side.Therefore, if the anglec of rotation of rotary table is bigger when waiting, the user need make bigger posture change and just can read angle index, and serviceability is not good in this.

So, technical scheme 4 described the present invention, when as prior art, can guaranteeing fully to represent the anglec of rotation of rotary table, only needing in the narrower scope around the rotary table angle index to be set can meet the demands, thereby can make user's reading angular scale like a cork, and then reach the purpose of the serviceability that improves this rotary table anglec of rotation indicating device.

If adopt the anglec of rotation indicating device in the technical scheme 5 described table saws, the pointer of when the left side of extending platform disposes dextrorotation, using, dispose the pointer of using when left-handed on the right side, thereby, can be at least in the rotating range that extends platform portion, graduation mark overlay configuration on the workbench direction of rotation of using when graduation mark of using when left-handed and dextrorotation makes the rotary table with this extension platform also can have aforesaid effect.

If adopt the anglec of rotation indicating device in the technical scheme 6 described table saws, the graduation mark that the graduation mark that can use when left-handed is used during with dextrorotation is radially disposing in the compactest mode on (rotary table radially).In addition, the graduation mark of using when the pointer of using when left-handed blocks dextrorotation, the pointer of using during with dextrorotation block the graduation mark of using when left-handed, thereby do not use the mistaken graduation mark that should read of two pointers, thereby further improve the serviceability of this angle indicating device.

Description of drawings

Fig. 1 is the unitary side view of the table saw with positive stop of present embodiment;

Fig. 2 is the view of arrow (II) direction among Fig. 1, is the vertical view of rotary table;

Fig. 3 is along the cutaway view of (III)-(III) line among Fig. 2, is the longitudinal section of rotary table and pedestal;

Fig. 4 is the rotary table with positive stop and anglec of rotation indicating device of the 2nd embodiment and the vertical view of pedestal, and the state shown in this figure is that rotary table is positioned at the reference position;

Fig. 5 is the enlarged drawing at (V) position among Fig. 4, the vertical view of the pointer of using during for dextrorotation;

Fig. 6 is the enlarged drawing at (VI) position among Fig. 4, the vertical view of the pointer of using when left-handed;

Fig. 7 is the vertical view of rotary table, and the state shown in this figure is that rotary table rotates 45 ° to the left from the reference position;

The amplification plan view of anglec of rotation indicating device when Fig. 8 rotates 45 ° to the left for rotary table;

Fig. 9 is the vertical view of rotary table, and the state shown in this figure is that rotary table rotates 45 ° to the right from the reference position;

The amplification plan view of anglec of rotation indicating device when Figure 10 rotates 45 ° to the right for rotary table;

Figure 11 is the vertical view that schematically shows the 3rd embodiment anglec of rotation indicating device, and the situation shown in this figure is identical with Fig. 8 also rotates 45 ° to the left for rotary table;

Figure 12 is the vertical view that schematically shows the 3rd embodiment anglec of rotation indicating device, and the situation shown in this figure is identical with Figure 10 also rotates 45 ° to the right for rotary table.

The specific embodiment

According to Fig. 1-Figure 12 embodiments of the present invention are described below.Fig. 1 shows the integral body of the table saw with positive stop 20 1 of present embodiment.The table saw 1 of present embodiment is characterised in that the supporting structure of positive stop 20, this positive stop 20 is used on rotary table 2 position of being cut material W being positioned, and it is same as the prior art as other basic structures of cutting machine etc., this part does not need to do change in the present embodiment, thereby omits its detailed explanation.

This table saw 1 has: be used for shelving on upper surface the rotary table 2 of being cut material W; The pedestal 3 that the mode that can rotate in horizontal plane with this rotary table 2 supports this rotary table 2; Cutting machine body 10 is provided with body support 5 at the rear portion (left side among Fig. 1) of rotary table 2, and cutting machine body 10 is supported in the rear portion of rotary table 2 and can overturns up or down via body support 5.The user is arranged in the right side of Fig. 1 table saw 1.

Cutting machine body 10 is supported in the top ends of the supporting arm 5a of body support 5 by body bolster 11, and can overturn up or down.This cutting machine body 10 has with CD-ROM drive motor (omitting among the figure)) be the rotatable rotary cutter 12 of drive source.Rotary cutter 12 is installed on the axle 16.The scope of half cycle haply of rotary cutter 12 is covered by body casing 13.The roughly lower half scope of rotary cutter 12 is covered by safety guard 14, and this safety guard 14 can link to open or close with the rotation up and down of cutting machine body 10.The rear side of body casing 13 is provided with the handle portion 15 that user's grasping is used.

Be arranged in this cutting machine 1 a side (Fig. 1 right side) thus the user hold handle portion 15 operation cutting machine bodies 10 it rotated downwards, accompany therewith, thus safety guard 14 open and expose rotary cutter 12, this exposed portions serve incision is cut among the material W.

The left and right sides portion of pedestal 3 is outstanding to the side from the left and right sides portion of rotary table 2.On this left and right sides ledge, be respectively arranged with auxiliary table 3a.The upper surface of two auxiliary table 3a, 3a and the upper surface of rotary table 2 are in same plane.Cut large-scalely when being cut material W, this auxiliary table 3a has the function as the part of workbench.

As shown in Figure 3, rotary table 2 is supported by the swivel bearing portion 30 that is arranged on pedestal 3 upper surfaces, and can horizontally rotate (rotating in horizontal plane) in the certain angle scope.Be wholely set the columnar portion 31 of bearing at the upper face center place of pedestal 3.This opening that bears portion 31 up.In this center of bearing portion 31 rotating shaft 32 is installed.In the present embodiment, this rotating shaft 32 adopts hex bolts.The threaded portion 32a of this rotating shaft 32 promptly is screwed into to pedestal 3 one sides to the bottom of the portion of bearing 31.Therefore, rotating shaft 32 is fixed with the state that stretches out upward from the bottom of the portion of bearing 31.

Be inserted with the supporting protuberance 33 that is arranged at centre below the rotary table 2 in interior all sides of the portion of bearing 31, and this supporting protuberance 33 can be with respect to the portion's of bearing 31 rotations.Above-mentioned rotating shaft 32 passes the center of this supporting protuberance 33, and can produce relative rotation between the two.The center line C of this rotating shaft 32 is the pivot of rotary table 2.

Rotating shaft 32 further stretches out upward from this supporting protuberance 33.On this extension, between the head 32b of supporting protuberance 33 and rotating shaft 32, the 22a of central support portion and two

thrust bearings

34,35 of following positive stop 20 are installed, and the 22a of this central support portion is clamped between two thrust bearings 34,35.By the clamping of these two

thrust bearings

34,35, the 22a of central support portion can produce relative rotation with rotary table 2 axially can not moving of rotating shaft 32, so this rotary table 2 can be rotated action.

By this rotating shaft 32, the 22a of central support portion of the supporting protuberance 33 of rotary table 2, two

thrust bearings

34,35 and positive stop 20 is fixed in the portion of bearing 31 of pedestal 3, and these parts bear portion 31 with respect to this and can not produce axial moving.

Rotary table 2 has roughly rounded playscript with stage directions body 2a and extends platform 2b, and this extension platform 2b extends radially with certain width from the close user's of playscript with stage directions body 2a a sidepiece.The upper surface of playscript with stage directions body 2a is in the same plane with the upper surface that extends platform 2b.Cutter seam plate 6 is to be mounted across the upper surface of playscript with stage directions body 2a and state on the upper surface that extends platform 2b.These cutter seam plate 6 width central portions are provided with cutter seam 6a, and the length direction of this cutter seam 6a is radially consistent with playscript with stage directions body 2a's.Rotary cutter can enter in this cutter seam 6a.In vertical view, this cutter seam 6a is by the rotation centerline (workbench rotation centerline C) of rotary table 2.Make the confined planes 21a of this cutter seam 6a perpendicular to the positive stop 20 that the following describes, this moment, rotary table 2 residing positions were reference position S.Can carry out so-called right angle cuts (vertical cut) to being cut material W when making rotary table 2 be positioned at reference position S.

As shown in Figure 2, positive stop 20 has the quilt of the rotation centerline C left and right sides that is positioned at rotary table 2 and cuts

material abutting part

21,21, and with two connecting portions 22 of semicircular in shape in vertical view of being cut that

material abutting part

21,21 fuses.

Two are cut between the lower end of

material abutting part

21,21 and connecting portion 22 and the upper surface of rotary table 2 (cut material and shelve face) and are provided with small gap.Be supported with state across this positive stop 20 of this small gap, thereby this rotary table 2 can not touch positive stop 20 when rotary table 2 is rotated operation across the top of rotary table 2.

Two side surfaces that are positioned at user's one side of being cut

material abutting part

21,21 for respectively with confined planes 21a, the 21a of the datum level Wa butt of being cut material W.Two confined planes 21a, 21a are positioned at same plane.Being cut material W is fixed on the rotary table 2 with the state that its datum level Wa is connected on one or two confined planes 21a.

As shown in Figure 2, in the elongated surfaces of the rotation centerline C of rotary table 2 between two confined planes 21a, 21a.And two confined planes 21a, 21a (its elongated surfaces) are perpendicular with the upper surface of rotary table 2.

About cut

material abutting part

21,21 with between the two across the state configuration of certain intervals.This is used to make rotary cutter 12 to pass through at interval, and the angle of inclination of rotary cutter 12 was suitably set when its big I basis was cut sth. askew.This two is cut the zone between the

material abutting part

21,21, and the rotation centerline C of rotary table 2 is positioned on the elongated surfaces of two confined planes 21a, 21a.

Two are cut

material abutting part

21,21 connects as one by connecting portion 22 by back one side in the position with respect to the user.The positive stop 20 of present embodiment by three-point support on pedestal 3.The positive stop 20 of present embodiment about by cut

material abutting part

21,21 and central authorities connecting portion 22 these positions, three places be supported on the pedestal 3.About be separately installed with bolster 23 by being cut on the

material abutting part

21,21, this bolster 23 is the state that stretches out towards pedestal 3 one side direction below.This two bolster 23,23 passes the through-hole groove 2c that is arranged on the rotary table 2 respectively and stretches out to the lower face side of this rotary table 2, and this top ends of stretching out is fixed on the upper surface of pedestal 3.Two through hole groove 2c, 2c are the circular arc formation of center line along the rotation centerline C with this rotary table 2 respectively, and this two circular arc is positioned on the same circumference.Thereby this rotary table 2 can not touched positive stop 20 when rotary table 2 being rotated operation.In the present embodiment, bolster 23 adopts hex bolts.

Consider that the angle when rotary cutter 12 is cut sth. askew changes, connecting portion 22 forms semi-round ring shape (when overlooking), and for avoiding the touching with rotary cutter 12, all within it sides are provided with the interior all lateral incline 22b that are inclined to mortar (truncated cone-shaped of handstand) shape.The center of the circumferencial direction of all lateral incline 22b is being wholely set the above-mentioned 22a of central support portion with it in this.The 22a of this central support portion passes the 2d of medium pore portion that is arranged at rotary table 2 centre, thereby extends to lower surface one side from upper surface one side of this rotary table 2.The top ends of the 22a of central support portion is provided with through hole 22c, and the diameter of this through hole 22c is set to make rotating shaft 32 to pass.Rotating shaft 32 passes this through hole 22c, thereby the top ends of the 22a of this central support portion is fixed on the rotating shaft 32.

For fear of the touching of 2d of medium pore portion and the 22a of central support portion and allow that rotary table 2 rotates in the certain angle scope, the 2d of this medium pore portion forms the circular arc (when overlooking) around workbench rotation centerline C.

Through-hole groove 2c who is arranged in Fig. 2 right side in the two through hole groove 2c, the 2c that are arranged on the rotary table 2 is provided with angle index (scale of expression angle) 25.By reading the indicated angle index 25 of the pointer that is installed on the positive stop 20 24, can accurately set the anglec of rotation of rotary table 2 with respect to reference position S.

About be respectively arranged with 2 places columnar support holes 21b, the 21b of opening upward on the

material abutting part

21,21 by being cut.These support holes 21b～21b is used to support the clamping device (not shown), and this clamping device is used for that quilt is cut material W and is fixed on rotary table 2.

Based on above explanation, the positive stop 20 of present embodiment as can be known, be prior art on the basis that both sides (bolster 23,23) supports, its central portion (central portion at built on stilts place) also is bearing on the pedestal 3, therefore, than prior art, can improve the supporting rigidity of this positive stop 20 greatly.Particularly, because improved the supporting rigidity of the rotation torque that 20 pairs of positive stops promptly produce through the active force of being cut the rotary cutter 12 that material W transmits along the external force P of rotary table in-plane, so can avoid positive stop 20 in the deflection of rotary table in-plane or compared with prior art reduced deflection to a great extent, thereby can keep in the cutting processing left and right sides confined planes 21a, 21a with respect to the position of rotary cutter 12 reliably, and then can in long-time, carry out high-precision cutting processing operation.

Existing positive stop, in order to improve its supporting rigidity, on the basis that is provided with the bolster (bolster that is equivalent to the bolster 23 of present embodiment) that passes rotary table, the structure that also adopts every side of the auxiliary table that for example is provided with to have position, two places also positive stop 20 to be supported in side, the left and right sides, yet, the positive stop 20 of present embodiment, since at the left and right sides position and the central part at built on stilts place amount to position, 3 place and support, not only can obtain higher supporting rigidity, also make supporting structure fairly simple.

In addition, in the prior art, wall thickness that need be by increasing each position of positive stop is guaranteeing its supporting rigidity, yet compared with prior art, the positive stop 20 of present embodiment can be realized thin wall thickness, and then reduces the weight of this table saw.

Can apply various changes to it for top illustrated embodiment.For example, above-mentioned illustrated structure is, the 22a of central support portion is installed on the rotating shaft 32 of swivel bearing portion 30, yet, employing is installed in other positions outside the pedestal 3 with the 22a of central support portion, for example with thread connecting mode the mode that the 22a of central support portion is installed in the sidepiece of the portion of bearing 31 also can.At this moment, can omit thrust

bearing

34,35.

In addition, the higher sliding bearing of also available sliding replaces thrust

bearing

34,35.

Also have, in the illustrated in the above embodiment, supporting structure about the both sides of positive stop 20, illustrative is by bolster 23 positive stop 20 to be bearing in structure on the pedestal 3, bolster 23 passes through-hole groove 2c, the 2c that is arranged on the rotary table 2, yet, can also on this basis or substitute this structure, adopt the structure that on auxiliary table 3a, 3a, these both sides is supported.Adopt replacement bolster 23,23 and when the structure that support at auxiliary table 3a, 3a place, can omit through-hole groove 2c, the 2c of rotary table 2.The supporting structure of the 2nd corresponding embodiment as shown in Figure 4.

In the supporting structure of the 2nd embodiment shown in Figure 4, on workbench 50, the parts and the structure that are equivalent to above-mentioned through-hole groove 2c, 2c and pass bolster 23,23 have wherein been saved.The both ends of the positive stop 40 of the 2nd embodiment are supported on the left and right sides auxiliary table 61,61 of pedestal 60.

This positive stop 40 has the quilt of the left and right sides of the rotation centerline C that is positioned at rotary table 50 and cuts

material abutting part

41,41, and cuts the connecting portion of overlooking semicircular in shape 42 that

material abutting part

41,41 is wholely set with this quilt.About this point, identical with the positive stop 20 of the 1st embodiment.And, cut between the upper surface of the lower end of

material abutting part

41,41 and connecting portion 42 and rotary table 50 two and to be provided with small gap, with touching between the upper surface of avoiding this positive stop 40 and rotary table 50, this point is also identical with the 1st embodiment.

The positive stop 40 of the 2nd embodiment, its end of being cut

material abutting part

41,41 is fixed on the upper surface of auxiliary table 61 respectively with set bolt 43.Positive stop 40 on pedestal 60 in both ends, the left and right sides and position, central connecting portion 42 3 place be supported.The connecting portion 42 of central authorities adopts the structure identical with the 1st embodiment to meet the demands.Rotary table 50 has body 51 and extends platform 52, and is rounded when body 51 is overlooked, and extends platform 52 and is set up with the state that stretches out to user's one side (downside Fig. 4) from the face side of body 51.In addition, identical with the 1st embodiment structure parts adopt identical symbol mark.

Above-mentioned the 2nd embodiment has also applied other improvement different with the 1st embodiment form.In above-mentioned the 1st embodiment, illustration such anglec of rotation indicating device: the right side through-hole groove 2c along rotary table 2 is provided with angle index 25, the pointer 24 that utilization is arranged on the positive stop 20 reads this angle index 25 (numerical value), thereby can set the anglec of rotation of rotary table 2 with respect to reference position S.About this anglec of rotation indicating device, in the 2nd embodiment, adopt the structure different with the 1st embodiment.

The anglec of rotation indicating device 70 of the 2nd embodiment has and is arranged at two

pointers

71,72 on the rotary table 50 and is arranged at angle index 73 on the pedestal 60.Two

pointers

71,72 are positioned at the circumference place of rotary table 50, and are arranged near the left side and right side of the extension base portion that extends platform 52.In the present embodiment, this two

pointer

71,72 is set at the position of departing from 30 ° on datum line S left side and right side along the workbench direction of rotation respectively.

As shown in Figure 5, from user's one side, the pointer 71 in left side (using during dextrorotation) has the framework 71a and the pointer body 71b of rectangle.Framework 71a radially is set up towards the state that outer circumferential side stretches out with the circumference from rotary table 50.Interior all sides of this framework 71a are display window 71c.In left side pointer 71, pointer body 71b be set at display window 71c along rotary table 50 outer circumferential side (the extension tip side of pointer 71) radially, and the sharp leg-of-mutton top 71d of this pointer body 71b is towards rotary table 50 interior all sides radially.But user's transmission display window 71c confirms angle index 73 with eyes, and the indicated angle value of top 71d of reading pointer body 71b.

As shown in Figure 6, from user's one side, the pointer 72 of right side when left-handed (with) equally also has the framework 72a and the pointer body 72b of rectangle.Interior all sides of this framework 72a are similarly display window 72c.In right side pointer 72, pointer body 72b be set at display window 72c along rotary table 50 interior all sides (the extension base end side of pointer 72) radially, and the sharp leg-of-mutton top 72d of this pointer body 72b is towards rotary table 50 outer circumferential side radially.But user's transmission display window 72c confirms angle index 73 with eyes, and the indicated angle value of top 72d of reading pointer body 72b.

About left side pointer 71 and right side pointer 72,

framework

71a, 72a and

pointer body

71b, 72b in other words, the parts of the left and right sides adopt identical specification, and

pointer body

71b and 72b rotary table 50 directly make progress towards being opposite.Therefore, for the pointer 71 in left side, half zone of outer radial periphery side of display window 71c is covered by pointer body 71b, and for right side pointer 72, half zone of inside all sides, the footpath of display window 72c is covered by pointer body 72b.So, pointer 71 for the left side, half zone of inside all sides (the not zone that is covered by pointer body 71b) can see angle index 73 in the footpath of display window 71c, for right side pointer 72, can see angle index 73 in half zone of outer radial periphery side (the not zone that is covered by pointer body 72b) of display window 72c.

Angle index 73 is positioned on close user's the side of pedestal 60, and is provided with along inclined wall 60a, and this inclined wall 60a is crooked fan annular and tilts below the outer circumferential side of rotary table 50 in vertical view.In the present embodiment, the label (scale plate) of expression angle index 73 sticks on the inclined wall 60a.The angle index 73 of present embodiment has a baseline 73a who is provided with along inclined wall 60a width substantial middle, and the one group of graduation mark 73b that uses when being arranged at the dextrorotation of all sides in this baseline 73a, and the one group of graduation mark 73c that uses when being arranged at this baseline 73a outer circumferential side left-handed.Baseline 73a is the circular arc setting at center along the rotation centerline C with rotary table 50.

In the present embodiment, the number range of two groups of

graduation mark

73b, 73c is 0 °～50 °, and minimum scale is 1 °.As Fig. 7 and shown in Figure 9, align with datum line S in the position of the demonstration of two groups of

graduation mark

73b, 73c " 30 ° ", and therefore, the angle of two groups of

graduation mark

73b, 73c on the workbench direction of rotation represented most of overlaid of scope.The angle index numerical value that is arranged in the graduation mark 73b of all sides of baseline 73a counterclockwise becomes big gradually along Fig. 4,7,9, and the angle index numerical value that is positioned at the graduation mark 73c of baseline 73a outer circumferential side becomes big gradually along clockwise direction.

The graduation mark 73b that is positioned at all sides of baseline 73a is positioned at the pointer 72 of the graduation mark 73c of baseline 73a outer circumferential side corresponding to the right side corresponding to the pointer 71 that from user's one side is the left side.Radially (rotary table 50 radially) position of this angle index 73 is set with reference to the location-appropriate ground of

pointer

71b, 72b on the rotary table 50.In the present embodiment, as Fig. 5 and shown in Figure 6, top 71d, the 72d of two

pointer body

71b, 72b diametrically desired location separately makes, from user's (overlooking) this top 71d, 72d just in time consistent with baseline 73a (just in time indicate on baseline 73a on the top).As shown in Figure 5, the pointer body 71b in left side is positioned at the outer radial periphery side of baseline 73a, and as shown in Figure 6, the pointer body 72b on right side is positioned at the inside all sides in footpath of baseline 73a.Therefore, the pointer body 71b in left side has blocked the graduation mark 73c of outer circumferential side, and the pointer body 72b on right side has blocked the graduation mark 73b of interior all sides.

Thereby, when make rotary table 50 in vertical view when clockwise direction rotates (Fig. 4 → Fig. 7), the numerical value of the graduation mark 73c of the outer circumferential side that the top 72d of the pointer body 72b by reading the right side is indicated can accurately be known the anglec of rotation of this rotary table 50 with respect to reference position (datum line S).And at this moment, the graduation mark 73b of interior all sides is blocked by pointer body 72b, so can not make a mistake the graduation mark 73c that read.

Relative therewith, when make rotary table 50 in vertical view when counter clockwise direction is rotated (Fig. 4 → Fig. 9), the numerical value of graduation mark 73b by the indicated interior all sides of the top 71d of pointer body 71b that reads the left side can accurately be known the anglec of rotation of this rotary table 50 with respect to reference position (datum line S).And at this moment, the graduation mark 73c of outer circumferential side is blocked by pointer body 71b, so can not make a mistake the graduation mark 73b that read.

As mentioned above, it seems it is the pointer 71 in left side and graduation mark 73b use when making rotary table 50 to (right side) rotation counterclockwise of interior all sides from user's one side, the pointer 72 on right side uses rotary table 50 with the graduation mark 73c of outer circumferential side when clockwise direction (left side) rotates.As shown in Figure 7, when rotary table 50 was rotated to the left, the pointer 71 in left side is indicator graduation lines 73b not, and as shown in Figure 9, when rotary table 50 was rotated to the right, the pointer 72 on right side is indicator graduation lines 73c not.Therefore, in this, can not make a mistake the graduation mark 73b or the 73c that read.

Based on said structure as can be known, rotary table 50 is positioned under the state of reference position S, the angle indicating device 70 of the 2nd embodiment, as shown in Figure 6, pointer 71 indications of when user's one side is right side left-handed, using " 0 ° ", and as shown in Figure 5, the pointer of using during the dextrorotation in relative left side 72 is also indicated " 0 ° ".If make rotary table 50 be positioned at reference position S, then can carry out vertical cut to being cut material W.

If rotary cutter 12 is tilted to the left to be cut sth. askew to cutting material W, as shown in Figure 7, as long as make rotary table 50 to the left side rotation of it seems from user's one side.With the numerical value of graduation mark 73c, can accurately know the anglec of rotation of the rotary table 50 of this moment during the outer circumferential side that the pointer body 72d of the pointer 72 by reading right side as shown in Figures 7 and 8 is indicated left-handed with respect to reference position S.As shown in Figures 7 and 8, if make rotary table 50 rotate 45 ° to the left with respect to reference position S, then the top 72d of pointer body 72b indicates " 45 ° " of the graduation mark 73c of baseline 73a outer circumferential side.At this moment, because the graduation mark 73b that uses during the dextrorotation of interior all sides is blocked and cannot see by pointer body 72b, so can not make a mistake the graduation mark 73c that read.

In contrast, if rotary cutter 12 is tilted to the right to be cut sth. askew to cutting material W, as shown in Figure 7, as long as make rotary table 50 to the right side rotation of it seems from user's one side.With the numerical value of graduation mark 73b, can accurately know the anglec of rotation of the rotary table 50 of this moment when reading the dextrorotation as the indicated interior all sides of the pointer body 71d of the pointer 71 in Fig. 9 and left side shown in Figure 10 with respect to reference position S.As Fig. 9 and shown in Figure 10, if make rotary table 50 rotate 45 ° to the right with respect to reference position S, then the graduation mark 73b of all sides " 45 ° " in the top 71d of the pointer body 71b indication baseline 73a.At this moment, because the graduation mark 73c that uses during outer circumferential side left-handed is blocked and cannot see by pointer body 71b, so can not make a mistake the graduation mark 73b that read.

As shown in Figure 4, be positioned at rotary table 50 under the state of reference position S, two

pointers

71,72 are all indicated in the position of angle index 73 for " 0 ° ".If rotary table 50 is rotated to the left from this reference position S, as shown in Figure 7, the pointer of using during dextrorotation 71 leaves graduation mark 73b, the 73c of angle index 73, the pointer of using when left-handed 72 comes reading angular scale 73 only, otherwise, if rotary table 50 is rotated to the right from this reference position S, as shown in Figure 9, the pointer of using when left-handed 72 leaves graduation mark 73b, the 73c of angle index 73, and the pointer of using during only by dextrorotation 71 comes reading angular scale 73.So, except the S of reference position, can not pass through two pointers, 71,72 reading angular scales 73 simultaneously, thereby, no matter rotary table 50 which sideway swivel to the left and right, all having only a pointer 71 (or 72) is effectively, can not cause the mistaken pointer that should utilize of user.

By the angle indicating device 70 of the 2nd embodiment as can be known, on the rotation direction of rotary table 50 with respect to the reference position, the pointer of using when being provided with the pointer 72 used when left-handed 71 with dextrorotation, corresponding with two pointers 71,72, the graduation mark 73b that uses when angle index 73 is provided with the graduation mark 73c that uses when left-handed and dextrorotation, so, can be with two graduation mark 73b, 73c overlay configuration on the workbench direction of rotation, thereby, compared with prior art, can in narrower spatial dimension, represent to have angle index 73 with prior art equal angular scope.If as prior art, only extending pointer of side configuration of platform 52, indicate the angle of the left-handed and dextrorotation of rotary table 50 with this pointer, in the time of then need being positioned at reference position S with rotary table 50 indicated " 0 ° " be the center in the left side and the right side both sides 50 ° scope all is set, promptly need in 100 ° scope, indicate, therefore, needs guarantee that the inclined wall 60a of pedestal 60 has more indication and uses space (position), thereby, the angle indicating device of prior art is when reality is used, for example run into and to make auxiliary table 3a, the 3a miniaturization (reduces auxiliary table 3a, the size of 3a) time, difficulty will take place.In addition, just can confirm the angle of indicating owing to need the user to make bigger posture change to the left or to the right, so its usability is also bad.In this, if adopt the angle indicating device of the 2nd embodiment, as Fig. 7 and shown in Figure 9, the graduation mark 73c of the graduation mark 73b of all sides and outer circumferential side indicates 50 ° angular range respectively in the baseline 73a, and the two only departs from 10 ° mutually on the workbench direction of rotation, thereby, compare with above-mentioned prior art, only need to guarantee that the indication position about half degree can meet the demands.So, when making auxiliary table 3a, 3a maximization be carried out held stationary to cutting material W, make the user not need to make the anglec of rotation that bigger posture change can be confirmed rotary table 50 like a cork, improved the serviceability of this table saw 1 greatly.

Angle indicating device for top illustrated the 2nd embodiment also can apply various modification.For example, in the 2nd embodiment, about angle index 73, illustration be provided with and have the interior all sides of a baseline 73 and graduation mark 73b, the 73c of outer circumferential side, yet also can adopt the structure that the graduation mark of using when left-handed, the graduation mark of using when on the opposing party dextrorotation being set are set on a side of two baselines.At this moment, can be when left-handed with and the graduation mark used during dextrorotation be arranged on interior all sides of baseline or the same side of outer circumferential side.Therefore, though illustrative be

pointer body

71b, 72b towards opposite configuration, yet the two is left diametrically mutually and be set to identical towards.The anglec of rotation indicating device 80 of the 3rd embodiment that applies these modification is as Figure 11 and shown in Figure 12.

The pointer of using when showing left-handed in the anglec of rotation indicating device 80 of the 3rd embodiment among Figure 11 82.The pointer of using when showing the dextrorotation in the anglec of rotation indicating device 80 of the 3rd identical embodiment among Figure 12 81.The pointer 81 that the pointer of using when left-handed 82 is used during with dextrorotation is identical with the 2nd embodiment, has framework 82a, 81a respectively, pointer body 82b, 81b and display window 82c, 81c.Framework 82a, 81a are opaque or translucent synthetic resin article, and the former is in the side, right side of extending platform 52, and the latter extends radially on the circumference of rotary table 50 respectively in the side, left side.This point is identical with the 2nd embodiment.Yet pointer body 82b, 81b and display window 82c, 81c are different with the 2nd embodiment.Sharp leg-of-mutton top 82d, the 81d of the pointer body 81b that uses when pointer body 82b that uses during the 3rd embodiment left-handed and dextrorotation are all radially towards outer circumferential side.Pointer body 81b that the pointer body 82b that uses when in addition, left-handed and the position of display window 82c are used than dextrorotation and display window 81c are more near outer radial periphery one side.

Corresponding, the angle index 83 of the 3rd embodiment is different with the 1st embodiment, and two

baseline

83a, 83b are positioned at all sides and outer circumferential side diametrically opposedly.Usefulness when interior all side group line 83a are dextrorotation is used when outer circumferential side baseline 83b is left-handed.Graduation mark 83c～83c, 83d～83d are arranged at the outer circumferential side of two

baseline

83a, 83b respectively.In the angle numerical value of graduation mark 83c～83c of using during the dextrorotation of all sides along with increasing gradually near workbench direction of rotation right side.In contrast, the angle numerical value of the graduation mark 83d～83d that uses during outer circumferential side left-handed is along with increasing gradually near workbench direction of rotation left side.

As shown in figure 11, see through the display window 82c of the pointer of using when left-handed 82, the graduation mark 83d～83d that uses in the time of can confirming outer circumferential side left-handed, the graduation mark 83c～83c that uses during dextrorotation is blocked by framework 82a and can not see.Relative therewith, as shown in figure 12, the display window 81c of the pointer of using when seeing through dextrorotation 81, the graduation mark 83c～83c that uses during the dextrorotation of all sides in can confirming, the graduation mark 83d～83d that uses when left-handed is blocked by framework 81a and can not see.

As from the foregoing, the angle indicating device 80 of the 3rd embodiment, be on the circumference of rotary table 50, be provided with two pointers 81,82, corresponding, the inclined wall 60a of pedestal 60 is provided with two graduation mark 83c～83c, 83d～83d, so, can be with two graduation mark 83c～83c, 83d～83d is overlay configuration on the workbench direction of rotation, thereby, with the 2nd embodiment in the same manner, compared with prior art, can reduce this angle index 83 required space on the workbench direction of rotation, therefore, do not need the user to make bigger posture change and can accurately confirm the anglec of rotation of rotary table 50, improved the serviceability of this anglec of rotation indicating device 30 and table saw 1 greatly with posture more easily.

In addition, for a pointer 81 (or 82), have only a graduation mark 83c (or 83d) in display window 81c (or 82c), to be shown, another graduation mark 83d (or 83c) is blocked by framework 81a (or 82a) and can not see, therefore, the user can not make a mistake the graduation mark that read, in this, can guarantee to have good serviceability, and can promptly read the accurate anglec of rotation.

In addition, though it is also not shown among the figure, yet on the anglec of rotation indicating device 80 of this 3rd embodiment, also can adopt the structure in the above-mentioned embodiment, promptly, when making rotary table 50 be positioned at reference position S, two pointers 81 then, 82 all indicate " 0 ° " of angle index 83, make rotary table 50 when this reference position S rotates to the left, then the pointer of using during dextrorotation 81 leaves angle index 83, make rotary table 50 when this reference position S rotates to the right, the pointer of using when then left-handed 82 leaves angle index 83, therefore, no matter make rotary table 50 which sideway swivel to the left and right, the user can not make a mistake the pointer 81 or 82 that utilize.

Also can further apply change to top the 3rd illustrated embodiment.For example,, also can dispose pointer in the position, two places on its circumference for the rotary table that is not provided with the circle of extending platform 52, corresponding, two angle indexs of configuration on pedestal, thus also can obtain same action effect.

Claims

1. table saw comprises: can be bearing in being used for fixing on the pedestal is cut the rotary table of material with horizontally rotating, and the quilt that is fixed on this rotary table is cut the cutting machine body that material cuts, it is characterized in that,

Also comprise be positioned at above-mentioned rotary table top be used to limit the above-mentioned positive stop of being cut the material position, this positive stop is along above-mentioned rotary table radially across the state above this rotary table, and positive stop, be positioned at rotary table both sides radially and support by said base, the central support portion of the span central authorities between above-mentioned both sides passes above-mentioned rotary table and is installed in the said base side.

2. table saw according to claim 1 is characterized in that, the central support portion of above-mentioned positive stop is installed in the swivel bearing portion of said base, and above-mentioned rotary table supports in this swivel bearing portion, and rotary table can be rotated.

3. table saw according to claim 2 is characterized in that, the central support portion of above-mentioned positive stop is installed on above-mentioned swivel bearing portion by thrust bearing.

4. table saw according to claim 1, it is characterized in that, also comprise the anglec of rotation indicating device of the above-mentioned rotary table of indication with respect to the anglec of rotation of reference position, this anglec of rotation indicating device comprise when being arranged at above-mentioned rotary table left-handed with and two pointers using during dextrorotation, and the angle index with two groups of graduation marks, these two groups of graduation marks are arranged on the said base, and are corresponding with above-mentioned two pointers, when being respectively left-handed with and use during dextrorotation

Graduation mark overlay configuration on the rotary table direction of rotation of using when above-mentioned graduation mark of using when left-handed and dextrorotation.

5. table saw according to claim 4, it is characterized in that, above-mentioned rotary table comprises the extension platform that stretches out to user's one side, the pointer of using during above-mentioned anglec of rotation indicating device above-mentioned left-handed is configured in the right side of above-mentioned extension platform, the pointer of using during above-mentioned dextrorotation is configured in the left side of above-mentioned extension platform, the graduation mark of using when utilizing indicated above-mentioned left-handed of the above-mentioned pointer of using when left-handed, read above-mentioned rotary table from the said reference position anglec of rotation left, the graduation mark of using during the indicated above-mentioned dextrorotation of the pointer of using when utilizing above-mentioned dextrorotation reads above-mentioned rotary table from the said reference position anglec of rotation to the right.

6. according to claim 4 or 5 described table saws, it is characterized in that, above-mentioned angle index is provided with above-mentioned graduation mark at the interior all sides and the outer circumferential side of a baseline, can read the graduation mark of outer circumferential side in blocking with the side in above-mentioned two pointers the graduation mark of all sides the time, can read the graduation mark of interior all sides when blocking the graduation mark of outer circumferential side with the opposing party's pointer.