CN85107252A - manual grinding and polishing tool - Google Patents

Abstract

Manual grinding or polishing are made by endless belt (6) with instrument.It is flat strip shaped basically by one and profile that have an arm (1) is at least come tensioning.An arm or a plurality of arm (1) are flexiblely facing to the profile setting.Therefore, polishing band or sand belt (6) are fixed under the effect of tensile force.Elastomeric material can be band steel or other elastomer.Can be provided with flexible intermediate layer between polishing band or sand belt and tool body, it is made into jointless belt (9).

Description

Manual grinding and polishing tool

The invention relates to a kind of have tensioning, non junction polishing band or the manual grinding of sand belt or the instrument of polishing usefulness.

The grinding and buffing instrument of manual usefulness is configured to by one, and tensioning thereon has a banded abrasive material, i.e. emery cloth or sand paper usually.Their other form can be file shape or abrading block shape, and wherein, abrading block can be made by rubber or cork and other elastomeric material.Polishing belt supporting frame with file shape has a flexible razor-edge liner, and polishing band or sand belt are fixed by strap by fishbolt.The shortcoming of all these instruments is: the sub-fraction that generally can only utilize abrasive material, because its whole strokes, (as file shape instrument), must go work in some unapproachable places, so can not all use, the fixing length of under any circumstance needed polishing band only is the part in the total length, so remainder have to be thrown away, thereby has caused a large amount of losses of abrasive material.

Now the shortcoming of these instruments also has, and when belt has bigger elongation later on through work, this just need be its tensioning, otherwise belt can be stuck and tear.Yet in the real work of various devices, this tensioning more afterwards promptly bothers and is time-consuming, and can only be tensioned to limited degree.

Another shortcoming of this class instrument is now, because their moulding that is to say that what use when they offer polishing or polishing can only be a convex surface, perhaps can only be a plane.

At U.S. Pat-PS 2,414, suggestion has been proposed at this point in 036, an abrading block that non junction polishing band is housed is provided for the grinding and buffing instrument.Abrading block has acute angle and obtuse angle, and endless belt can be provided with the elastic layer of being made by felt, rubber or foam rubber between endless belt and abrading block on it.Because abrading block is discerptible, so the tensile force of the polishing band on the abrading block can be realized by wedge-shaped element.That also can make spline-simulating in abrading block inside can intermeshing toothed element, and by abrading block is drawn back mutually toothed element is meshed together.

This can trace back to suggestion in 1945, fails to put into effect in real work.Because have device for fastening, i.e. the abrading block shape structure of wedge-shaped element or tooth bar does not have that optimum efficiency illustrated as the front, abrasive material on support, promptly polishing band and sand paper in use can extend, and if do not give tensioning and will be stuck at once.According to U.S. Pat-PS2, tensioning at any time in 414,036 the abrading block.Just the opposite, when being with the pressure that acts on the abrading block to reduce by polishing, device for fastening is loose, so not only is with fold owing to causing that through work certain elongation makes to polish, but also can cause when tensile force reduces the device for fastening inefficacy therefrom.Coming by the wedge shape part under the situation of tensioning, these chocks will be deviate from from abrading block; And when adopting tooth bar to fix, tooth bar is thrown off mutually, and this that is to say that abrading block no longer is to be in stable state, but is separated into single part automatically.

The objective of the invention is to produce a kind of instrument, it can make full use of polishing band or sand belt, tightens up polishing band or sand belt and need not complicated apparatus.Polishing band or sand belt automatically keep rate of tension all the time, and have a flat working face and a plurality of protruding working face with different radii at least.

This task can solve by a kind of manual grinding or polishing tool that has the endless belt of a tensioning.It has distinct feature, promptly this instrument by one be basically flat strip shaped and have at least the profile of an arm to be constituted.Wherein have at least an elastic arm to be in and profile or the position relative with another arm.The outside of profile and all arms is wrapped with a jointless polishing band or sand belt tightly.

Owing to have an elastic arm at least, thereby endless belt can be placed on this hand tools and need not the complicated process that is fixed and clamped.In addition, endless belt when promptly making the belt elongation owing to work, can have enough tensile forces by the elastic force tensioning so far.Belt is fixed on the instrument by intrinsic frictional force, and still can move along its length direction not too arduously, when being the subrange of tool using with box lunch, still can guarantee absolutely to make full use of abrasive material.

Changing the polishing band can be undertaken by one or two arm is forced together simply.This simple manual operations guarantees that polishing is with or sand belt is injury-free.

In a kind of advantageous structure of the present invention, profile is made the handle that overarches, an elastic arm is arranged, and handle is continuous therewith.Handle both can be made with timber, also can be by metal or plastic production.Be connected arm above it and have the profile of flat, and flexible.Look from the side, it is L shaped that the cross section of this instrument becomes basically, after load onto polishing band or sand belt, constituted one have an arch limit and wedge angle rounded triangle.When processing work, this protruding arch is held in the palm as handle, but it also can be used to process concave surface, and the knuckle radius little at arcuate handle upper and lower side place also can play this same purpose.The outstanding advantage of this instrument is that its leg-of-mutton limit only is made of the polishing band or the sand belt of tensioning basically.The handworker might come to process fast and correctly arcuate surface with this, because when pressurizeing to instrument, can make the polishing band of elastic tension accord with the shape of workpiece in subrange, and need not to make special radius on instrument.

Another kind of the present invention has in the detailed structure of many advantages stipulates that profile is made the arc of shallow arcuation, and has two arms to be attached thereto to connect.The radius of bow is done greatlyyer, that is to say that under any circumstance radius is approximately greater than 100 millimeters.More suitable size is between 150 millimeters to 250 millimeters.The situation of arm is then different, and it is flat.Therefore, when processing work, operational have a convex surface and two planes.

According to designed a kind of structure according to the invention, the both sides of profile are the boundary with two radiuses, and arm forms from these radiuses extensions.At the transition position from the profile to the arm certain radius is set, can makes polishing band or sand belt dog leg not occur and fracture.These radius ratios are less, and its order of magnitude is between 2 millimeters to 6 millimeters.So just can guarantee, even belt is still slyness under coarse granularity.Also be easy to mobile along its length as required belt on the other hand.Another advantage of this a kind of structure is, can utilize these radiuses to come groove in the processing work.

The present invention has in the structure of multiple advantage and stipulates that two ends are the total length of the profile length on boundary greater than all arms with the radius, and the latter end that links to each other with arm by curved section extends towards the direction of bow.Because the length overall of arm is less than profile length, thus just might make arm further to the inside motion, so just making polishing band or sand belt at an easy rate the instrument of installing to get on.Can also simplify the process of dress belt like this, promptly people can seize the latter end that is connected with arm by radius, and pressurization makes two arm rests near in opposite directions, has reduced the girth of milling tools or polishing tool thus.

It is relatively good that entire tool all uses a kind of elastomeric material to make.Can take natural rubber as elastomeric material, but also can adopt synthetic rubber to be used as elastomeric material.Adopt elastomer (for example polyurethane) that many advantages are arranged, it can form in corresponding moulding in direct pouring.Fact proved, adopt fiberglass reinforced plastics, particularly polyester, also is very suitable.The shape of instrument always adapts with employed plastics, so that reach desirable elastic reaction.

Best design regulation of the present invention, elastomeric material are the band steel.Common this band steel is a kind of spring steel, for example can buy on market, according to the trade mark CK53 of German metallargist association, CK60, CK67, MK75, MK101 etc., and for will with instrument moist or that will contact with acid, alkali in case of necessity, then should adopt steel-smelting, as can on market, buying, the trade mark 67 STCR5 according to German metallargist association, 50 CRV4,58 CRV4,12 C _rN _i17 7 etc.

For various workpiece materials, especially when polishing, all require the instrument can be mildly and be pressed on the processed workpiece in large area.Therefore the present invention's regulation in the middle of polishing band or sand belt, in subrange, is provided with a flexible intermediate layer at least.Jointless band shape can be made by sponge rubber or foam rubber in this intermediate layer.Also the intermediate layer can be bonded on the profile and arm on, or only be bonded on the arm or only and be bonded on the profile.For this situation, verified, preferably adopt cork.

The selected design according to the present invention, sand belt is made by jointless felt band or braid over braid, in other words, brings with polishing and to change after the polishing band, still can handle the surface of having polished in the front with antiscuffing paste with same hand tools.

The present invention can be illustrated in conjunction with the accompanying drawings.

Milling tools stereogram when Fig. 1 represents non junction polishing band is housed.

Fig. 2 is that this same instrument is not loaded onto the stereogram when polishing band.

Fig. 3 is the cross section of this instrument.

Fig. 4 and Fig. 5 are the design forms that geometry slightly changes.

Fig. 6 and Fig. 7 are the version of having only this instrument of an arm.

From Fig. 1 to Fig. 4, the profile that links to each other with arm forms by bow 5, and wherein, Fig. 1 to Fig. 3 makes the bow 5 of protrusion, then makes the bow 5 of spill among Fig. 4.Bow 5 links to each other with left radius 3 with right radius 2.Two radiuses 2 and 3 and arm 1 join, arm 1 links to each other with latter end 8 through curved section 7.Thumb and forefinger respectively inserted in the curved section 7 go, and latter end 8 is pressed against together, bow 5 is tightened, the overall circumference of instrument reduces, and so just can drop it off in polishing band or the sand belt 6 to go.After removing the pressure that acts on terminal 8, material rebounds, and acts on pressure on the inner surface of polishing band or sand belt 6, polishing band or sand belt is fixed on gives on the fixed position.

In Fig. 1 to Fig. 4, bow 5 and have radius 2 and 3 and the arm 1 of curved section 7 make by flexible band steel, that is to say that entire bracket is made of the same material.

Represented a kind of instrument similar to the above among Fig. 5, it also is to be made by the material of single variety.Yet be not to select steel for use in this case, but adopt elastoplast, preferably adopt Vulkollan(material) make.The crooked partition 12 identical with polishing band or sand belt 6 width is round matrix 13.Circular hole 14 is arranged on the matrix 13, they are pulled in the amount of deflection that can add longbow 5 together.

Fig. 6 and Fig. 7 have represented that at this moment profile is formed by handle 4, is connecting arm 1 on handle 4 as the L shaped structure of polishing or polishing tool.Have only an arm 1 among Fig. 6, it is the same with handle 4, is to be made by the mylar that glass fibre strengthens.Fig. 7 is then different with it, and arm 1 wherein is formed from strip steel, and handle portion is cast by thermoplastic.Also attach in Fig. 7 and represented a foam rubber band 9, it is used as the intermediate layer between polishing band or sand belt 6 and the instrument, and equally also makes jointless belt.Illustrated as the front that it is softer that foam rubber 9 can make it the pressure ratio that acts on the workpiece.With represented similar of Fig. 4, on arm 1, be provided with cork surface 10.

Claims (14)

1, have tensioning, non junction polishing band or the manual grinding of sand belt or the instrument of polishing usefulness, it is characterized by: this instrument by be basically flat strip shaped and have at least the profile of an arm to be constituted, have an elastic arm (1) in the instrument at least, it is in and profile or the relative position of another arm (1).In the outside of profile and all arm (1), wrapping up in a non junction polishing band or sand belt (6) tightly.

2, manual grinding according to claim 1 or polishing tool is characterized in that: profile is made the handle (4) that overarches, and handle is connected with an elasticity straight-arm (1).

3, manual grinding according to claim 1 or polishing tool is characterized in that: profile is made of the bow (5) of making shallow arch and linking to each other with two arms (1).

4, according to claim 1 and 2 described manual grinding or polishing tools, it is characterized in that: the profile both sides are the boundary with radius (2,3), and arm (1) extends out from these radiuses.

5, according to described manual grinding of claim 1 to 4 or polishing tool, it is characterized in that: the length of bow (5) that with radius (2,3) is boundary is greater than the total length of arm 1.

6, according to described manual grinding of claim 1 to 5 or polishing tool, it is characterized in that: the latter end (8) by curved section (7) is connected with arm (1), extend towards the direction of bow (5).

7, according to described manual grinding of claim 1 to 6 or polishing tool, it is characterized in that: entire tool is made by elastomeric material.

8, according to described manual grinding of claim 1 to 7 or polishing tool, it is characterized in that: this elastomeric material is a kind of band steel.

9, according to described manual grinding of claim 1 to 7 or polishing tool, it is characterized in that: this elastomeric material is a kind of elastomer.

10, according to described manual grinding of claim 1 to 7 or polishing tool, it is characterized in that: this elastomeric material is a kind of fiberglass reinforced plastics.

11, according to described manual grinding of claim 1 to 10 or polishing tool, it is characterized in that: in polishing band or sand belt (6), be provided with flexible intermediate layer at subrange at least.

12, according to described manual grinding of claim 1 to 11 or polishing tool, it is characterized in that: jointless belt (9) is made by sponge rubber or foam rubber in the intermediate layer.

13, according to described manual grinding of claim 1 to 11 or polishing tool, it is characterized in that: the intermediate layer be by be bonded in profile or (with) cork (10) on the arm (1) constituted.

14, according to described manual grinding of claim 1 to 13 or polishing tool, it is characterized in that: sand belt is a jointless felt band or braid over braid.

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