CN85107252B - Manual grinding or polishing tool - Google Patents

Abstract

The present invention relates to a manual grinding or polishing tool made of a seamless tape, and the manual grinding or polishing tool is tensioned by a moulding surface with basically at least one flat-bar shape arm (1). One arm or a plurality of arms (1) are elastically arranged at the opposite side of the moulding surface. Thus, a grinding tape or a polishing tape (6) are fixed under the action of tensioning force, and an elastic material can be a strip steel or other elastic bodies. A middle layer with elasticity can be arranged between the grinding tape or the polishing tape and a tool body, and the middle layer is prepared into a seamless tape(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.

The shortcoming of these instruments also has now, 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 not only bothers but also 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.

U.S. Pat-PS3,699729 show and set forth a kind of flat strip shaped, by the elastic support that elastomeric material is made, be with non junction polishing band in its outside.It can process convex surface, but can not processing plane and concave surface.The polishing belt supporting frame does not constitute the flat region.Under stress state not, be smooth unique plane and form, but as shown in its Fig. 5 and 6, this plane has just become shape when contacting with the polishing object by polishing band itself, and the formation concave surface.In this sanding apparatus, though very little convex region being arranged, can not utilize.Because do not have on the one hand the handle of controlling usefulness is set,, then only hold the polishing band if will polish with convex surface; Its handle 10 hinders the carrying out of polishing work again on the other hand.

Another weak point of this invention is a quite difficulty of dismounting polishing band.At this moment at first polishing band to be put into handle 10, then bow is clamped to the polishing band is enclosed within above it.Fig. 3 and Fig. 4 have represented that the polishing band on support is irregular, and it must pass through on the cup head of attachment screw 18.When the polishing Tape movement, will cause and damage the polishing band, or make the polishing band distortion in this area at least, thereby can not utilize the polishing band fully.

At U.S. Pat-PS2, suggestion has been proposed at this point in 414,036, 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 that felt, rubber or foam rubber are made 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, promptly the abrading block shape structure of wedge-shaped element or tooth bar does not have optimum efficiency.As having illustrated the front, the 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.

Shown a kind of wooden sanding block among U.S. Pat-PS3106806, wherein two wooden bodies that separate of making the abrading block form are connected to each other with pilot pin by spring and are in the same place.Tape swapping inconvenience under this structure situation is pressed to these two wooden bodies together because must overcome spring force, and must shut down old band simultaneously and put new band.In addition, be with in the purpose that moves on the support owing between timber and band, there being bigger frictional force to be difficult to realize.Also have, the just profile of a rigidity that this device had, thus the polishing that can not be used to wet, because exist the danger that tensioning apparatus is choked in the hole of wooden body under wetness action.

U.S. Pat-PS2493852 has also introduced a kind of by two kinds of abrading blocks of forming that separate, they by spring catch promptly the taper bush of the mutual support by being in relative position come tensioning.These two solid outsides are surrounded by rubber sleeve, so little or nothing moves belt on this solid possibility.And tape swapping is also very bothersome herein.This device is made up of many parts, and a rigid body profile is arranged, and needs the quite processing of trouble, and weight ratio is big thereby be not easy to operation.

U.S. Pat-PS3063208 has introduced a kind of abrading block, and it is with to press the abrading block shown in the US-PS3106806 quite similar.But it is not to use tensioned, but by the tension element with screw work.Here related device also is made up of many parts, at first must assemble them, so also be relatively more bothersome.

Patent GB-OS2114028 introduced is a kind of abrasive material to be placed triangular supports below it, abrasive material by being coated in the abrasive material back side binding agent and the contact zone on the abrasive material support be bonded together.This district can bend to protruding or recessed arc by the adjusting of adjusting rod, but when making this bending operation, throws off in the partial zones of support by means of the polishing band that binding agent covers up, and this is because because bending has changed the girth that is bent the location.

By the polishing of patent FR-PS830733 bow basically with the feature similarity of existing United States Patent (USP), just additionally will polishing by a handle, band utilization penetrates screw and metal tension force bow is fixed together, so the polishing band can not move, and can only utilize the part of polishing band under this structure situation.As US-PS3699729, can not polish equally here plane and concave surface.

The objective of the invention is to make a kind of instrument, in this instrument, polishing band or sand belt can automatically keep rate of tension all the time, and this instrument can not only be processed convex surface, and can processing plane and concave surface, and polishing or sand belt are easy to remove and install easy.

This task can solve by a kind of manual grinding or polishing tool.This instrument includes a flat strip shaped, an arc elastic support of making by elastomeric material and a tensioning, wrapping up in the non junction polishing or the sand belt of arc elastic support.This instrument has distinct feature, and is that promptly arc elastic support is linked to each other with elastic arm with one by an elastic arm and become the arcuate handle of L shaped structure to be formed with this elastic arm.Perhaps adopt another kind of structure, be arc elastic support by two elastic arms link to each other with two elastic arms with one and be in two elastic arm relative positions on bow constitute, the two ends of this bow are the boundary with the radius, arm extends out from these radiuses, the end that is connected with arm by curved section extends towards the direction of bow, so that can laminating arms when tape swapping.

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 by the elastic force tensioning so far, promptly make when being with elongation owing to working, enough tensile forces can be arranged, with being 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, still can guarantee absolutely to make full use of abrasive material with box lunch.

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

In a kind of advantageous structure of the present invention, support 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 loading onto polishing band or sand belt, constituted one have 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, its leg-of-mutton limit only is made of the polishing band or the sand belt of anxiety basically, the handworker might come to process fast and correctly arcuate surface with this, because when pressurizeing to instrument, can make the tight polishing band of elasticity in subrange, accord with the shape of workpiece, and need not on instrument, to make special radius.

Another kind of the present invention has in the detailed structure of many advantages stipulates that support 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, and the situation of arm is then different, and it is flat, and therefore, when processing work, operational have a convex surface and two planes.

According to meeting the designed a kind of structure of the present invention, the both sides of support are the boundary with two radiuses, and arm forms from these radiuses extensions.At the transition position from the support 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 stent 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 stent 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 adopt 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 contact with acid, alkali in case of necessity, then should adopt steel-smelting, as can on market, buying, trade mark 167STCR5 according to Germany metallurgical work association, 50 CRV4,58 CRV4,12 CrNi177 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 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 handles the surface of having polished in the front with same hand tools with antiscuffing paste.

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 transversal 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 support that links to each other with arm is by 5 meters formation of bow, and wherein, Fig. 1 to Fig. 3 makes the bow 5 of protrusion, and 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, so just, can drop it off in polishing band or the sand belt 6 and going, remove the pressure that acts on terminal 8 after, material rebounds, and act on pressure on the inner surface of polishing band or sand belt 6, polishing band or sand belt are fixed on the preposition.

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 support 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 (9)

1, a kind of manual grinding or polishing tool, has an arc elastic support flat strip shaped, that make by elastomeric material, with a tensioning, wrapping up in the non junction polishing or the sand belt of arc elastic support, it is characterized in that: this arc elastic support is by an elastic arm (1), and the arcuate handle (4) that links to each other with elastic arm (1) with and become L shaped structure with elastic arm (1) is formed.

2, a kind of manual grinding or polishing tool, has flat strip shaped, the arc elastic support of making by elastomeric material, with a tensioning, wrapping up in the non junction polishing or the sand belt of arc elastic support, it is characterized in that: this arc elastic support is by two elastic arms (1), the bow (5) that links to each other with two elastic arms (1) with one and locate on two elastic arms (1) relative position constitutes, the two ends of bow are with radius (2,3) be the boundary, elastic arm (1) is from these radiuses (2,3) extend out, the latter end (8) that is connected with arm (1) by curved section (7) extends towards the direction of bow (5).

3, manual grinding according to claim 1 or polishing tool is characterized in that: the elastic support two ends are the boundary with radius (2,3), and elastic arm (1) is extended out by a radius (2).

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

5, manual grinding according to claim 1 and 2 or polishing tool is characterized in that: arc elastic support is by making with a kind of elastomeric material.

6, manual grinding according to claim 5 or polishing tool is characterized in that: this elastomeric material is a kind of fiberglass reinforced plastics.

7, according to claim 1 or 3 described manual grinding or polishing tools, it is characterized in that: elastic arm (1) is formed from strip steel, and handle (4) is made by thermoplastic.

8, manual grinding according to claim 5 or polishing tool is characterized in that: this elastomeric material is a kind of band steel.

9, manual grinding according to claim 5 or polishing tool is characterized in that: this elastomeric material is a kind of elastomer.

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