DE102017130801A1 - Device for providing sanding sheets - Google Patents

Abstract

A device for providing preferably flexible abrasive sheets (8), one of which is releasably attachable to a sanding disc of a hand-held grinding tool, formed by a dimensionally stable cartridge (2) for receiving a plurality of stacked abrasive sheets (8).

Description

The invention relates to a device for providing abrasive sheets according to the preamble of claim 1.

Abrasive sheets are used to grind surfaces with orbital, rotating or vibrating motions. In this case, the abrasive sheets, which are usually formed as a circular surface, releasably secured to a sanding plate of a hand-held grinding tool, including mutually corresponding Velcro layers of the sanding sheet on the one hand and the sanding plate on the other hand serve. On the side facing away from the Velcro layer of the abrasive sheet abrasive grinding necessary for the abrasive removal is applied.

Instead of circular, the abrasive sheet may also be contoured differently, as needed and required.

A change of the abrasive sheet, for example, if this is no longer useful after use, but it is extremely time-consuming because sanding sheets must be manually removed from a package and applied to the sanding pad, with a custom-fit edition is mandatory.

In order to be able to remove this better manually from the sanding plate when the sanding sheet is changed, the sanding sheet is larger in its diameter dimension than the sanding pad, so that an edge overhang is formed.

The manual change of the sanding sheet is very time consuming, in particular, as an accurate positioning of the sanding sheet on the sanding pad is required. A cost-optimized operation of the grinding blade change is clearly contrary.

In particular, from the aspect that equipped with abrasive sheets grinding tools are used in a variety, especially in the professional field, so not in the home improvement sector, this circumstance is of particular importance.

The invention has for its object to provide a device of the generic type βen, with a faster and smoother change a sanding sheet is possible.

This object is achieved by a device having the features of claim 1.

According to the invention, a plurality of abrasive sheets of the same type are now held stacked in a dimensionally stable cartridge, wherein the individual abrasive sheets are rectified on each other, ie, the abrasive sheets are each with their abrasive grain side on the connection side, ie the Velcro side of the adjacent abrasive sheet, said Cartridge having a removal opening, which is assigned to the connecting side of the so-called first sanding sheet facing.

This dimensionally stable cartridge forms a dispenser, which is closed at one end initially with a lid and at the other end with a bottom, this dispenser is filled with the grinding sheets factory delivered prefabricated.

The stack of abrasive sheets rests on a slide, with the removal of at least one abrasive sheet of the stack can be moved so far until the next abrasive sheet is brought into a removal position.

In its simplest form, the operation of the slide takes place manually, for which purpose the cartridge has a guide opening extending in its axial direction, for example in the form of an elongated hole, in which an outwardly projecting handle of the slide is guided.

This slide is frictionally held within the cartridge against slipping, for which purpose it has an elastic edge which rests with a corresponding frictional force on the inner circumferential surface of the cartridge.

The at least one guide opening may also be formed spirally instead of an axial course. Moreover, several, for example, two guide openings may be provided, which are opposite or offset from each other, so that overall the slider is securely held.

In a manual operation of the slide, the lid remains in its position closing the cartridge, wherein, however, the lid has a center hole whose diameter is larger than that of the grinding disc, but smaller than that of the grinding sheet to be removed. After removal of the sanding sheet, so after attachment of the sanding sheet on the sanding pad, this projects laterally in a conventional manner beyond the edge of the sanding pad.

The level height can be detected by the position of the slider or through a window, if, as provided in accordance with a further idea of the invention, the slider is actuated by a Schieberautomaten. In any case, the abrasive sheets are held against rotation in the cartridge, for example by an inner contour which is adapted to the peripheral contour of the abrasive sheets.

For product identification, tracking and analysis, the lid or the bottom are provided with a bar code or QR code, which can also be shown encrypted.

The bottom as well as the lid protect the abrasive sheets during storage and transport, with the bottom and / or lid being clamped to the cartridge.

As an insertion aid for the grinding tool or the sanding pad for removing an abrasive sheet, the cover may be provided with a circumferential, opposite to the cartridge axially aligned collar.

As mentioned, an automatic slide valve is provided according to an advantageous embodiment of the invention, which is stationary installed at the site of the abrasive sheet removal and to which the dispenser can be placed.

To prepare the dispenser for a sanding sheet removal, remove the cover and put it over the bottom, also provided with a center hole. Thus, a plunger, which is pushed through the center holes, automatically move the slide axially as needed, and thus bring the respective upper abrasive sheet in a removal position.

Incidentally, the lid is inseparably connected to the floor, which, like the lid, can be designed as a cap. In addition, the floor acts as a stand security for the dispenser as well as as a receptacle in the automatic gate valve.

Preferably, the support surface of the slider on which rests the last sanding sheet is formed so that a connection with the sanding pad of the grinding tool is excluded, whereby it can be seen that the cartridge is emptied.

The bottom, the lid, the cartridge and the slide form a structural unit that can be changed virtually in one operation.

In addition to the already mentioned visual recognition of the filling level of the dispenser, the filling level can be determined by a higher-level computer system, in particular when using a Schieberautomaten, the automatic slide is designed so that a plurality of dispensers are arranged on a rotatable holder in the manner of a revolver, the itself after emptying of a dispenser cyclically twisted so that a filled dispenser is placed in the effective range of the automatic slide. The function of the plunger is preferably pneumatic or hydraulic. It is also conceivable to use a spindle drive.

Further advantageous embodiments of the invention are characterized in the subclaims.

Embodiments of the invention will be described below with reference to the accompanying drawings.

• 1-3 ein Ausführungsbeispiel einer erfindungsgemäßen Einrichtung in verschiedenen Ansichten
• 4-6 ein weiteres Ausführungsbeispiel einer Einrichtung, gleichfalls in unterschiedlichen Ansichten
• 7-9 ein weiteres Ausführungsbeispiel der Erfindung in gleichfalls unterschiedlichen Darstellungen.

Show it:

• 1-3 An embodiment of a device according to the invention in different views
• 4-6 a further embodiment of a device, also in different views
• 7-9 a further embodiment of the invention in equally different representations.

In the 1 - 3 is a device for providing abrasive sheets 8th one of which is releasably attachable to a not shown sanding plate of a hand-held grinding tool. A rod of similar sanding sheets 8th is in a dimensionally stable cartridge 2 stored, which is preferably made of plastic or cardboard or the like.

The sanding sheets 8th are provided on one side with an adhesive layer, in particular a Velcro layer, for attachment to the sanding pad, and on the other side with an abrasive grain, which forms a useful surface.

The superimposed abrasive sheets 8th are stacked so that there is always one side of the abrasive grain on one side.

End is the cartridge 2 through a lid 3 and a floor 4 closed, both being designed as a cap, each with a center hole 10 . 11 , Overall, there is a donor 1 , which is factory prefabricated as a unit and can be brought in the form shown to the site and used there.

The lid 3 is on the cartridge 2 frictionally held, with a nozzle 6 the cartouche 2 engages, which is slightly smaller in its inner diameter than the outer diameter of the cartridge 2 , resulting in a press fit, so to speak, so that the lid 3 is held captive. Concentric to the neck 6 extends in the opposite direction in a clear diameter larger collar 5 which is used in another functional variant, which will be described later.

How the particular 3 shows is the inner surface of the cartridge 2 with a peripheral contour 12 provided, the the peripheral contour of the abrasive sheets 8th equivalent.

Next is inside the cartouche 2 a slider 9 arranged with the resting stack of abrasive sheets 8th after removal of a sanding sheet 8th is moved to a removal position.

To prevent rotation of the slider 9 which rubs against the inner wall of the cartridge 2 is present that he holds in each position automatically, in the example, several, in the axial direction in the form of a slot extending guide openings 7 in the cartouche 2 provided in the at least one slide 9 fastened handle engages, by means of the slide 9 is manually displaceable.

At the same time serve the guide openings 7 the level detection of the stack of abrasive sheets 8th , The slider 9 becomes after removal of a sanding sheet 8th moved so far that the topmost sanding sheet 8th on a front side of the lid 3 comes to the plant.

This is the middle hole 10 of the lid 3 smaller in diameter than the outer diameter of the abrasive sheet 8th , The outer diameter of the sanding pad, however, is slightly smaller than the clear diameter of the center hole 10 , so that the sanding pad for connection with the sanding sheet 8th through the middle hole 10 can be performed. Because the sanding sheet 8th is flexible, it is after connecting to the sanding pad easily through the center hole 10 , undulating the edge, can be removed from the stack.

In the 4-6 is a donor 1 after preparation for use in a slider machine 13 shown.

Here is the lid 3 from the cartouche 2 pulled off and with his collar 5 ahead on the cap-shaped bottom 4 deferred, with the two center holes 10 . 11 are approximately congruent.

Through the middle openings 10 . 11 becomes a pestle 17 ( 9 ) of the automatic slide valve 13 passed on the sanding sheets 8th opposite side on the slide 9 attacks and advances this axially.

A marker identifying the donor attached to the lid 3 especially in the collar 5 defined inner wall area is now no longer recognizable.

While the 1 and 4 the donor 1 each play in a side view, the show 2 and 5 a section through the dispenser, according to the line AA in 1 or. 4 and the 3 and 6 the donor each in a perspective view.

In the 7-9 is the slider machine 13 shown in different views and in the 7 in a perspective plan view, in the 8th in a perspective bottom view and in the 9 in a cross section.

This slider machine 13 has a stationary mountable base plate 18 on, at the a pestle device 15 is attached, in which the plunger 17 held axially movable, including a compressed air line 16 connected to the supply of compressed air.

At the same distance from each other are on a rotary table 14 donor 1 positioned, the intermittently the plunger device 15 be fed until the plunger 17 with the middle holes 10 . 11 of the lid 3 and the soil 4 flees.

The drive of the rotary table 14 also takes place pneumatically in the example, with a compressed air line also for this purpose 16 is provided, which is in operative connection with a corresponding drive unit.

The round table is equipped 14 with donors 1 of which one in the 4-6 is shown. It can be seen that the lid 3 released from its closed position and on the floor 4 deferred, with the collar 5 as an insertion aid when equipping the rotary table 14 serves.

In function, the plunger contacts 17 the slider 9 and moves it so far that after removal of the upper abrasive sheet 8th the stack of abrasive sheets is nachgeschoben, to a position in which the next abrasive sheet 8th can be removed.

The level of the sanding sheets 8th in the donor 1 can, as already mentioned, be calculated by a higher-level computer system, including at the plunger device 15 corresponding sensors are provided.

LIST OF REFERENCE NUMBERS

1

donor

2

cartridge

3

cover

4

ground

5

collar

6

Support

7

guide opening

8th

sanding sheet

9

pusher

10

center hole

11

center hole

12

peripheral contour

13

slide machine

14

roundtable

15

follower means

16

Compressed air line

17

tappet

18

baseplate

Claims (20)

Device for providing preferably flexible abrasive sheets (8), one of which is releasably attachable to a sanding pad of a hand-held grinding tool, characterized by a dimensionally stable cartridge (2) for receiving a plurality stacked abrasive sheets (8). Setup after Claim 1 , characterized in that in the cartridge (2) an axially displaceable slide (9) is arranged, on which the stack of abrasive sheets (8) rests. Setup after Claim 1 or 2 , characterized in that the slide (9) is held in the displaced position frictionally in the cartridge (2). Device according to one of the preceding claims, characterized in that the slide (9) has a frictionally applied to the inner wall of the cartridge (2) edge. Device according to one of the preceding claims, characterized in that the cartridge (2) is closed at one end by a cover (3) and at the opposite end by a bottom (4). Device according to one of the preceding claims, characterized in that the lid (3) and / or the bottom (4) has a central hole (10, 11) whose cross-sectional dimension is smaller than the associated dimension of the abrasive. Device according to one of the preceding claims, characterized in that the cartridge (2) has at least one guide opening (7) extending in the direction of displacement. Device according to one of the preceding claims, characterized in that the guide opening (7) is aligned parallel to the cartridge (2) or spirally thereto. Device according to one of the preceding claims, characterized in that the slide (9) has a handle for manual displacement, wherein the handle passes through the guide opening. Device according to one of the preceding claims, characterized in that the stack of abrasive sheets (8) is held against rotation in the cartridge (2). Device according to one of the preceding claims, characterized in that the abrasive sheets (8) are stacked such that their abrasive grain side to the bottom (4) point out and their connection side to the removal opening. Device according to one of the preceding claims, characterized in that the inner surface of the cartridge (2) is provided with a profile (12) whose contour corresponds to the contour of the abrasive sheet (8). Device according to one of the preceding claims, characterized in that the cover (3) and / or the bottom (4) are frictionally held on the cartridge (2). Device according to one of the preceding claims, characterized in that the cover (3) has a protruding collar (5) whose clear diameter corresponds to the outer diameter of the bottom (4) in the region of its contact surface on the cartridge (2). Device according to one of the preceding claims, characterized in that an automatic slide (13) is provided, with a plunger (17) having plunger means (15), wherein the plunger (17) on the sanding sheets (8) facing away from the slide ( 9) is present. Device according to one of the preceding claims, characterized in that the plunger (17) through the center holes (10, 11) of the lid (3) and the bottom (4) is guided. Device according to one of the preceding claims, characterized in that a plurality of equiangularly spaced dispenser (1) on a rotary table (14) are held, which is movable in cycles. Device according to one of the preceding claims, characterized in that the plunger (17) and the rotary table (14) are pneumatically, hydraulically or by electric motor driven. Device according to one of the preceding claims, characterized in that the Level monitoring of the stack of abrasive sheets (8) in the region of the plunger device (15) sensors are provided which are in operative connection with a computer. Device according to one of the preceding claims, characterized in that the cover (3) is provided with a marking, in particular in the form of a barcode or QR code.

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