CN1096335C - Abrasive machine - Google Patents

Abstract

A fixing member is provided for fixing a front end section to the rest of a base plate. The fixing member is provided with a surface fastener which is integrally molded with the fixing member.

Description

Abrasive machine

The present invention relates to the improvement of sanding apparatus.Specifically, the present invention relates to a fixed component that two parts of the base plate of hand-held sander can be interfixed, and the base plate that combines a kind of like this fixed component.

At present, can obtain a variety of hand-held sanders that are used to carry out different operating.In such equipment, sand paper, glassine paper etc. are attached on the base plate, and base plate or be connected in one handle so that use hand-drive, perhaps can be connected in a motor.

A kind of base plate of hand electric Reciprocatory sander is made up of two-layer, the one, can be fixed in the rigidity upper strata of motor etc., the one, compressible bottom has a surface fastener material on the lower surface of bottom, thus can be easily suitable sand paper attached on this surface.

A kind of sander of particularly suitable has a shape and is similar to the family expenses sole plate.The major part of base plate is rectangular basically oval-shaped, and comes to a point gradually to the tip of its front portion.A defective of this type base plate is that it is very hot that the tip of base plate can become, and this tip portion of base plate weares and teares sooner than other parts.

In the past, in order to overcome this problem, be that bottom is arranged to two parts, the one, for good and all be fixed on the bottom rear portion on the base plate remainder basically, the 2nd, removable bottom front tip part.

The bottom front tip partly is to be made by the dense foam material, and rigidly fixes member by one and be attached to base plate.Fixed component is the plate of rhombus, and is connected in base plate by a screw.The hook portion of having gluedd joint a hook and eye fitting on this fixed component has a complementary with it snapping part so that interfix with fixed component, and has snapping part so that connect polishing sheet on another surface on the surface of bottom front tip part.

This its weak point that disposes.The manufacturing of fixed component relates to a lot of steps, specifically, needs molded rigid plate, and hook type material is cut to required form, subsequently hook type material is glued onto on the rigid plate.Because fixed component is quite little, so it is cumbersome and time-consuming to operate.

Secondly, as mentioned above, when work, it is very hot that the tip of the base plate of sander can become.The thermal cycle meeting that adhesive continues causes the intensity of base plate to reduce greatly, and may cause fixed component to break away from.In addition, when adhesive when being heated deliquescing, the dust that produces in the sanding process can accumulate on the adhesive.Therefore produced the Another reason that base plate quality is descended.

The present invention is intended to overcome the problems referred to above, it is characterized in that, fixed component of the present invention has the surface fastener spare that forms one with it.Therefore, in first aspect, the invention provides a kind of fixed component, the first that is used for forming a sander base plate lower surface part combines with the second portion of sander base plate, fixed component be rigidity and be flat basically, be provided with a surface fastener device so that first is attached to described fixed component on a surface of fixed component, described surface fastener device and fixed component form one.

In the sander of some type, if a base plate part is worn and torn quite terriblely, fixed component also needs to be replaced so.Therefore, be comparatively ideal if fixed component can removably be attached to the second portion of described sander base plate.

When the sanding operation, compare with remainder, the a part of part that forms the first of sander base plate lower surface can become very hot, thus be arranged on surface fastener spare on fixed component one appropriate section be easy to be subjected to it to influence (described fixed component is a part that first is fixed in the base plate lower surface) thus make it useless.

Particularly, when fixed component is to make with the thermoplastic synthetic resin material, and when being of similar shape with the part of base plate lower surface, a part that does not have surface fastener spare preferably is set, so that at base plate with there is not to form between the part of surface fastener spare a gap, can distribute heat by this gap, thus make this part can heating.

Yet, be to make if there is not the part of surface fastener spare by the single plane that does not form surface fastener spare, protruding rank should be arranged between part that does not have surface fastener spare and remainder, this will cause the sanding out-of-flatness.Therefore, preferably on the part that does not have the surface fastener device of fixed component, be provided with the projection of a height less than the surface fastener device.By such projection, just can and not have still to keep under the gapped situation between the part of surface fastener spare at the base plate lower surface, can there be protruding rank simultaneously, prevent the parts heating so can realize effectively heat radiation.

Above discussion mainly is to carry out at the base plate with a front end wedge angle.Certainly, the present invention can be applied to any base plate, as long as the fixed point thermal source that has a meeting that the performance of a base plate part is reduced on the base plate.Yet the present invention particularly describes at above-mentioned base plate.Therefore, preferably, fixed component can be incorporated into second portion with first, makes first form at least a portion at base plate tip.

Mentioned above, in a kind of useful especially back-plane design, have two-layer, i.e. a rigidity upper strata and a compressible bottom.Sand paper can be attached to the whole lower surface of bottom.In a variety of operation process, sander must be adapted to a narrow space, or want in sanding to a corner always.Therefore, preferably, on the direction that is parallel to the base plate bottom, the upper strata is extended not above bottom.Also have,, preferably make bottom be parallel to extension far away as far as possible on any direction of base plate lower surface for rigidity is provided.

When first and second parts mutually combined, preferably, the sidepiece of fixed component did not extend to such an extent that surpass the sidepiece of bottom.More preferably, fixed component is arranged to flush with the lateral edges of base plate basically.

Form in described first under the situation of a part at tip, front side of base plate, preferably, fixed component has an end points that can be attachable to the base plate front side.More preferably, fixed component being affixed to the sidewall of base plate flushes.

Fixed component can wear and tear after long-time the use, and because the relation of being heated more may the at first most advanced and sophisticated place wearing and tearing in its front side.Therefore, it is desirable to very much, fixed component can be inserted in more than one mode.For example, fixed component can have two wedge angles, and its shape is that any one all can place forward terminal in these two wedge angles.So just can extend the service life of fixed component.Therefore, preferably, fixed component comprises two or more wedge angles.

Have found that a kind of good especially design is a rhombus, wherein any one is all attachable and flush in the most advanced and sophisticated point in the front side of base plate in two wedge angles.

The most advanced and sophisticated point in the front side of two wedge angles of fixed component is the part that can become the hottest.Therefore, tip portion can be made into the plane that does not have fastening device.Perhaps, the short projection of specific surface fastening device can be set on the part that does not have the surface fastener device.

Fixed component has a surface fastener device that is overmolded in it.More preferably, the surface fastener device comprises a plurality of a plurality of molded hooks that upwards protrude out from the plane of fixed component.These molded hooks can mesh with the ring that is arranged in the described first.

Fixed component removably is attached to described base plate.Preferably, be used for the device of removably attached fixed component fixed component can be affixed to make that the surface of its upper surface near base plate, the upper surface of fixed component be positioned fixed component with surface fastener device facing surfaces on.Thereby this can but a screwed hole makes the fixed component spiral be incorporated into base plate on the fixed component by being arranged on.

Perhaps, fixed component can comprise a chuck, thereby fixed component can be attached to base plate, or dismantles from base plate.Preferably, chuck comprises at least two spaces and the slender member that protrudes out from that surface relative with the surface fastener device of fixed component.Described slender member is provided with several lugs, so that match with a complementary member of a standing part of sander base plate.

Second aspect, the invention provides a kind of base plate that is used for sander, described base plate has a lower surface, comprise on the lower surface and being used for the attached device on it of sand paper, base plate comprises that one forms dismountable bottom of a base plate lower surface part, and this bottom can be attached to base plate by a flat basically fixed component.Fixed component comprises the surface fastener device that is used for described bottom is attached to fixed component, and surface fastener device and fixed component form one.

As mentioned above, preferably, base plate has a front side tip portion, and the described bottom of dismounting down is the part at base plate tip.More preferably, fixed component is dismountable.This fixed component can be fixed in base plate by a screw.Yet preferably, fixed component can be attached to described base plate by the chuck of foregoing chuck and so on.

Mentioned above, the tip point of base plate can bear very big heat.Therefore, the fastening device at the place, tip may melt and ooze out the sidepiece of base plate.For avoiding this problem, preferably, the surface fastener spare of fixture does not extend the same far with the tip point of base plate.

Preferably, base plate according to second aspect present invention comprises that a bottom and that forms a described base plate lower surface part is fixed in the upper strata of bottom, described upper strata extends beyond a side of bottom, to provide one with the attached surface on it of described fixed component.

More preferably, fixed component has the upper and lower surface of being separated by sidewall, and at least a portion of fixed component sidewall has formed the part of sidewall of the bottom plate.

In some cases, may wish the second portion formation one of fixed component and base plate.Therefore, according to a third aspect of the invention we, the invention provides a kind of base plate that is used for sander, this base plate comprises that one forms the removable front section of a base plate lower surface part, wherein, removable front section is attached to the remainder of base plate by the surface fastener device, the surface fastener device is set is for the upper surface with removable front section is buckled on the surface of remainder of base plate, and the surface fastener spare on the base plate remainder forms one with base plate.

Below in conjunction with each embodiment the present invention is described.

Fig. 1 shows the lower surface of a sander base plate;

Fig. 2 shows the sander base plate according to second aspect present invention;

Fig. 3 shows the fixed component according to first aspect present invention;

Fig. 4 shows the situation after the base plate assembling among Fig. 2;

Fig. 5 shows the sander with base plate shown in Figure 4;

Fig. 6 is the underside view of sander shown in Figure 5 and base plate;

Fig. 7 is the complete underside perspective view of sander according to another embodiment of the present invention;

Fig. 8 lock is the bottom plan view according to the fixed component of Fig. 7 embodiment;

Fig. 9 is the side view of fixed component shown in Figure 8;

Figure 10 is the partial perspective view of amplification of configuration example of lower surface of the most advanced and sophisticated wedge angle of fixed component;

Figure 11 is the partial perspective view of amplification of the modified structure of wedge angle lower surface shown in Figure 10;

Figure 12 is the partial perspective view of amplification of another modified structure of wedge angle lower surface shown in Figure 10;

Figure 13 is the partial perspective view of amplification of the another modified structure of wedge angle lower surface shown in Figure 10;

Figure 14 is the partial perspective view of amplification of the another modified structure of wedge angle lower surface shown in Figure 10.

Fig. 1 shows the lower surface of a sander base plate, and it has a removable front portion.In Fig. 1, the front portion of base plate 1 is removed.Described front portion is assemblied in the space 3.The lower surface remainder of base plate 1 is covered by a hook type material, thereby can be with attached on it through the sand paper of suitable processing.

Fig. 2 is the side view of base plate 1.The main part of base plate is made up of two-layer, and they are one can be fixed in the rigidity upper strata 7 and a lower floor 9 of motor.The lower surface 11 of lower floor 9 is provided with hook type material, thereby can sand paper is attached on it.The two parts 6 and 8 that form one are each other arranged on the upper strata 7.Part 8 is extended to such an extent that surpass the end of lower floor 9.

As shown in Figure 4, a fixed component 15 is fixed in upper strata 7 by chuck 17.Chuck 17 comprises two slender members 19 with lug.With two slender member 19 mutual extrusion, just can be with member 15 7 releases from the upper strata.The lower surface 21 of member 15 is provided with the hook that forms one with member 15.As we can see from the figure, the hook that do not distribute at the tip of member 15.This is that the hook at this place may melt because the tip of base plate can become very hot.The hook material of fusing may be oozed out the base plate both sides, thereby reduces the performance of base plate.

In case member 15 is attached to upper strata 7, mutually combine by the hook of the ring 25 on anterior 23 upper surfaces of bottom with fixed component 15, just bottom front portion 23 can be attached to member 15.Bottom front portion 23 is provided with one and glueds joint hook layer 26 on the throne.Therefore, a series of hooks that sand paper can be attached to lower surface 27 are arranged on the lower surface of bottom front portion 23.

Fig. 4 shows the base plate that has the bottom front portion at tip 29.As we can see from the figure, lower surface 11 and 27 is aimed at mutually and is flushed, thereby forms a continuous surface.

Fig. 3 shows the details of fixed component 15, wherein shows the lower surface of fixed component.On the lower surface of fixed component 15, be provided with a plurality of integrally moulded hooks 31.Fixed component 15 is rhombuses, has wedge angle 33 and 35.Being used for the chuck 17 (Fig. 2) that this member is fixed in base plate is design like this, that is, it can make the wedge angle 33 or 35 of member 15 be fixed on most advanced and sophisticated 29 the summit.

Hook does not appear on wedge angle 33 and 35.This is because the hook on these wedge angles can not bear very big heat, otherwise just may melt.The hook of fusing can ooze out the both sides of base plate 1, thereby reduces the performance of sander.

Fig. 5 shows the situation that base plate is pulled down from a sander.Sander 50 is sanders of a hand-held, and is electronic.Sander 50 has a following buck plate 52, and it can connect the base plate 1 of sander.

Sander base plate 1 is by buck plate 52 and connector 54 are connected in sander 50 down.Connector 54 is on the upper surface 56 of base plate.Upper surface 56 has formed the part on the rigidity upper strata 7 of base plate 1.

Fig. 6 shows after base plate 1 is attached to sander 50, the bottom situation of base plate.Dismountable anterior 23 are positioned at the tip 29 of base plate 1.

Fig. 7 shows the structure of a portable sander according to another embodiment of the present invention.In Fig. 7, label 101 expressions one portable sander.The portable sander 101 of this embodiment has one handle 103 on its body 102, and operation fully manually under the situation of vibration machine can be set in body 102.

One flat metal base plate 104 is attached on the lower surface of body 102 firmly.Base plate 104 can be made by artificial resin.As shown in Figure 7, the shape of base plate 104 is such, that is, stretch out by a rectangle part 104a and from the one end and to be formed until the isosceles triangle of a wedge angle 104b.One emery cloth 106 removably is attached on the lower surface of base plate 104 by a compressible intermediate member 105, is the end except base plate 104.The shape of emery cloth 106 is identical with member 105.Compressible intermediate member 105 is to be made by heat-resisting synthetic rubber or heat-resistant synthetic resin foam.The male joggle piece 107 of surface fastener spare is to be made by woven or knitting sheet material or synthetic resin sheet material, and has a plurality of hook 107a, and this joggle piece is attached to the lower surface of member 105 integratedly by adhesive.On the other hand, on the rear surface of emery cloth 106 by adhesive attached integratedly the female joggle piece of surface fastener spare, they can be meshed with male joggle piece.

Compressible intermediate member 105 have one with the terminal corresponding breach 105a of base plate 104, its shape is such, that is, is made up of two isosceles triangles of vertically arranging, they and acute angle 104b are of similar shape, and the coincidence of their base.Fixed component 108 of the present invention is applied on the breach 105a.Certainly, to be not limited to be rhombus to the shape of breach 105a.

According to this embodiment, the fixed structure of sand paper or emery cloth is made up of these parts: one is assemblied in the interior fixed component 108 of breach 105a of compressible intermediate member 105, as shown in Figure 7, this member has the rhombus identical with breach 105, and is removably to be attached to base plate 104; Piece 109 in the middle of identical compressible of one material and shape and compressible intermediate member 105, it removably is attached to fixed component 108; And the emery cloth 110 of a rhombus, it removably is attached on the lower surface of compressible middle piece 109.

Fixed component 108 is by very high molded the forming of thermoplasticity synthetic resin of rigidity.On the shape sheet form base member 108a identical,, be equipped with integrally moulded a plurality of hook 108b except wedge angle 108a ' sentences with breach 105a.In this embodiment, be provided with a screwed hole 108c at the center of basal component 108, so that fixed component 108 is fixed on the lower surface of metal base plate 104 by a screw.Screwed hole 108c is that the axis of the columnar projections 108d that outwards protrudes out along the center from basal component 108a is provided with, described projection be assemblied in be formed at compressible in the middle of in the pilot hole 109b in the piece 109.But columnar projections 108d has the function of strengthened thread hole 108c.

Each hook 108 among this embodiment is to be arranged in each row of columnar projections 108d both sides.According to this layout shown in the figure, be provided with four groups of hook 108b in the both sides of columnar projections 108d, every group two row, 5 of every row, and on each side, be provided with two groups.Direction along perpendicular to these hook groups in the both sides of these hook groups and columnar projections 108d, is provided with two groups of hooks, every group of four lines, 19 of every row.In addition, aforementioned along being parallel to than outside hook group and towards wedge angle 108a " direction also be provided with two groups of hooks, every group of triplex row, 15 of every row.Owing to hook 108b is arranged to like this, should not be had what directional problems with the ring that matches, thereby improved joggled strength and contact-ratio.

As Fig. 8 of amplifying and shown in Figure 9, locate to be provided with bossing 111 at the wedge angle 108a ' of basal component 108, this is the exclusive feature of the present invention.Bossing 111 is made up of a plurality of protruding 111a.In the embodiment shown, on a wedge angle, have 6 * 3, altogether 18 protruding 111a.The protruding 111a of among this embodiment each can be molded on the surface of basal component 108a by the multiple template that does not illustrate (they have constituted the mould of retaining element 108).Usually, at this mould of molded hooks integratedly that is used for, because the shape bending of hook can not directly be provided with the hook forming cavity on a member.Therefore, need to form a plurality of templates with required breach always constituting the shape of whole hook, and these template layers must be gathered into folds to have the hook forming cavity by discharge processes.

Shown in Figure 10 as what amplify, hook 108b has the ribs 108b that is integrally moulded in hook body 108b ' both sides ".Ribs 108b " and hook body 108b ' be molded respectively in stacked and the die cavity that separates.In described embodiment, can be by being used for ribs 108b " die cavity come molded protruding 111a.That is to say, at two ribs 108b " between hook body be not molded.So, only need molded ribs 108b " come as protruding 111a.Therefore, the height of protruding 111a is less than hook 108b.

Fixed component 108 can engage with chuck and replace screw to be attached to metal base plate 104.Specifically, be provided with an engagement head that protrudes out basal component 108a with center, surperficial upper edge that surface opposite that is formed with hook 108b, this engagement head is separated into two parts vertically, and can be inserted in the conjugate foramen that is arranged on the base plate 104 and basal component 108a is fixed in base plate 104.

The quantity of projection 111a should be not limited to the situation of this embodiment.Perhaps, for example shown in Figure 11, can be only six protruding 111a partly be set in the outermost edges of wedge angle 108a ', all the other all omit.Also have, bossing should be not limited to one group of projection 111a.Perhaps, shown in Figure 12-14, can form a flat bossing 111 or a plurality of its length are set and equal the width of three hooks or the convex ridge 111b of length along the capable vertical or bearing of trend of hook.

Piece 109 is to use with compressible intermediate member 106 identical materials to make in the middle of compressible, and has the shape identical with fixed component 108.A plurality of ring 109a that are used for the hook 108b of fixed component 108 engagement are arranged on the surface of piece 109.In this embodiment, ring 109a is the pile loop of pile loop fabric, and the pile loop fabric is then by adhesive etc. firmly on the face attached to piece 109 in the middle of compressible, and pile loop outwardly.On another face of compressible middle piece 109, be formed with a plurality of hook 109b.These hooks are by in a fabric substrate monofilament being woven into ring, and each pile loop cutting is formed.Certainly, hook 109b can be as fixed component 108 and compressible intermediate member 109 molded forming simultaneously integratedly.Yet, because the relation of intensity normally adopts braiding to make hook.Center at compressible middle piece 109 is formed with a pilot hole 109c, so that the columnar projections 108d of fixed component 108 is assembled wherein.

On the rear surface of emery cloth 110, be formed with a plurality of ring 110a, so that be meshed with the hook 109b of compressible middle piece 109.With compressible in the middle of the ring 109a of piece 109 the same, ring 110a also is that the pile loop by a pile loop fabric obtains.Therefore, in this embodiment, the pile loop fabric sticks on the surface of emery cloth 110, and each pile loop outwardly.

For example shown in Figure 7, by above fixed structure, can fixed component 108 be fixed in the wedge angle 104b of base plate 104 ends by screw etc., described base plate is attached to the lower surface of portable sander body 102 firmly.The 109a that respectively encircles of piece 109 in the middle of compressible is propped up the fixed component 108 that is formed with hook 108b, just can be fixed in fixed component 108 to the 109 engagement ground of piece in the middle of compressible.The 110a that respectively encircles of emery cloth 110 is propped up the lower surface that is formed with piece 109 in the middle of hook 109b compressible, just can be meshing with each other them firmly.

Utilization is attached with the portable sander 101 of the present embodiment of emery cloth 110, just can carry out sanding in common mode and handle.Usually, the terminal wedge angle of base plate just can become very hot, thereby makes the end of the fixed component that is attached to base plate be subjected to hot influence.On the contrary, in the sander 101 of this embodiment,, between the wedge angle 108a ' of base plate 104 and fixed component 108 ends, formed a gap by bossing 111.Therefore, base plate 104 and wedge angle 108a ' are difficult to heating, and hook 108b on every side can not melt, thereby has improved service life.

In addition, owing to there is bossing 111,, so just can prevent to form protruding rank at sharp corner so the wedge angle of piece 109 does not contact with the wedge angle 108a ' of fixed component 108 in the middle of compressible.Therefore, can carry out level and smooth and uniform sanding operation, the sanding surface that is obtained should be as wishing polishing.

Should be appreciated that though toply described general embodiment of the present invention, the present invention is not limited to these embodiment, still can make various modification within the scope of the present invention.

Claims (23)

1. fixed component, be used for formation one sander base plate (1, the first (6 of a lower surface part 104), 109) with sander base plate (1,104) second portion (8,104b) combine, fixed component (15,108) be rigidity and be flat basically, at fixed component (15,108) a surface is provided with a surface fastener device so that with first (6,109) be attached to described fixed component (15,108), it is characterized in that, described surface fastener device and fixed component (15,108) form one.

2. fixed component as claimed in claim 1 is characterized in that, described fixed component (15,108) removably be attached to described base plate (1,104) second portion (8,104b).

3. fixed component as claimed in claim 1 or 2, it is characterized in that, described fixed component (15,108) be to make with the thermoplastic synthetic resin material, and with described base plate (1, the described part of described lower surface 104) is of similar shape, and described surface fastener device is not set on the part that becomes the hottest of described fixed component (15,108).

4. fixed component as claimed in claim 2 is characterized in that, is provided with the bossing (111) of a height less than described surface fastener device on the described part that does not have described surface fastener device of described fixed component (108).

5. fixed component as claimed in claim 1, it is characterized in that, described fixed component (15,108) with described first (6,109) be incorporated into described second portion (8,104b), make described first (6,109) formed at least a portion at the tip, front side of described base plate (1,104).

6. fixed component as claimed in claim 1 is characterized in that, described fixed component (15,108) can with more than one orientation be attached to described second portion (8,104b).

7. as claim 3 or 4 described fixed components, it is characterized in that, described fixed component (15,108) be rhombus, and be connected in the second portion (8 of described base plate (1,104) with one of two orientations, 104b), make one of two wedge angles of fixed component (15,108) can be attached on the point at tip, front side of described base plate (1,104).

8. fixed component as claimed in claim 7 is characterized in that, the most advanced and sophisticated point in the front side of described two wedge angles of described fixed component (15,108) is the part that can become the hottest.

9. as each described fixed component in the claim 1 to 3, it is characterized in that, described surface fastener device comprise a plurality of molded hooks (31,108b) so that be arranged on a plurality of rings in the first (6,109) (25,109a) engagement.

10. fixed component as claimed in claim 1 is characterized in that described fixed component is attached to described second portion, the upper surface of fixed component (15,108) be adjacent to second portion (8, surface 104b); The upper surface of fixed component (15,108) be positioned at fixed component (15,108) with surface fastener device facing surfaces on.

11. fixed component as claimed in claim 10 is characterized in that, described fixed component (108) also comprises a screwed hole (108c), makes described fixed component (108) to be attached to second portion (104b) by a screw.

12. fixed component as claimed in claim 10 is characterized in that, described fixed component (15) comprises that one is used for described fixed component (15) is attached to the chuck (17) of described second portion (8).

13. fixed component as claimed in claim 12, it is characterized in that, described chuck (17) comprises at least two spaces and the slender member (19) that protrudes out from that surface relative with the surface fastener device of fixed component (15), described slender member (19) is provided with several lugs, so that match with a complementary member of described second portion (8).

14. base plate that is used for sander, described base plate (1,104) has a lower surface, comprise on the lower surface and being used for the attached device on it of sand paper, described base plate (1,104) comprise that one forms the detachable first (6,109) of described base plate (1, a 104) lower surface part, first (6,109) flat basically rigidly fix the second portion (8 that member (15,108) is attached to base plate (1,104) by one, 104b), described fixed component (15,108) comprises and is used for described first (6,109) is attached to described fixed component (15,108) surface fastener device, it is characterized in that described surface fastener device and described fixed component (15,108) form one.

15. base plate as claimed in claim 14 is characterized in that, described base plate (1, second portion 104) (8,104b) comprise that one forms the bottom (9 of described base plate (1, a 104) lower surface part, 105) and a upper strata (7,104) of being fixed in described bottom (9,105), described upper strata (7,104) on the direction that is parallel to described base plate (1,104), extend above described bottom (9,105), so that provide one to allow the attached surface on it of described fixed component (15,108).

16. base plate as claimed in claim 15 is characterized in that, described fixed component (15,108) has the upper and lower surface that separates by sidewall, at least a portion of the sidewall of described fixed component (15,108) has formed the part of the sidewall of described base plate (1,104).

17., it is characterized in that described first (6,109) has formed the part at the tip, front side of described base plate (1,104) as each described base plate in the claim 14 to 16.

18. base plate as claimed in claim 16 is characterized in that, described fixed component (15,108) has two sidewalls that intersect at a cusp, and it has formed the part of two sides at the tip, front side of described base plate (1,104).

19., it is characterized in that described fixed component (15,108) is dismountable as each described base plate in the claim 14 to 18.

20. base plate as claimed in claim 19 is characterized in that, described fixed component (108) is fixed in described second portion (104b) by a screw.

21. base plate as claimed in claim 19 is characterized in that, described fixed component (15) is attached to described second portion (8) by a chuck (17).

22. base plate as claimed in claim 14 is characterized in that, described fixed component (15,108) be with the second portion of described base plate (1,104) (8,104b) form one.

23. base plate as claimed in claim 1 is characterized in that, the surface fastener device of described fixed component (15,108) extends the summit at the tip, front side that can not get base plate (1,104).

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