CN1024493C - Cripping device for nappy materials - Google Patents

Abstract

A gripping device (10) for gripping nappy work-pieces in textiles operations comprises a base body (12), one or more gripper means (38) of elongate body form carried by the base body (12), and a slidable part (20) slidable relative to the base body (12) and provided with squeeze means (36) serving to actuate the gripper means (38) on movement of the part (20) whereby one end of the gripper means (38) grips the work-piece, the other end of the gripper neans (38) serving to attach the means to the base body (12). More specifically, each gripper means (38) is slotted longitudinally (50) and is surrounded by the relevant squeeze means (36) whereby the gripper means (38) is laterally compressed when the slidable part (20) moves towards the workpiece. Between the base body (12) and the slidable part (20) there is a hollow zone (62) which is supplied with pressurised gas from the base body (12), and the arrangement is such that pressurised gas is discharged from the hollow zone (62) mainly via the slot portions of the gripper neans (38) closest to the hollow zone (62), the gas leaving the gripper means (38) through slot portions at said one (outer) end of the gripper means (38).

Description

Cripping device for nappy materials

The present invention relates to a kind of clamp device of villous workpiece, this device comprises a body, one or more jaws and a relative body are slidably and be provided with the parts of a jam-packed element for each jaw, jaw is processed into slender bodies, in place near first end, for be suitable for contact workpiece by the jam-packed element round, and have the slit along the jaw longitudinal axis, the jaw other end is then fixing stoping jaw with respect to body translational motion longitudinally, and the slit on the jaw can be by sliding part towards the motion of workpiece direction and jam-packed.With regard to its original idea, the villous object is meant yarn fabric, is also included within this definition but the surface can produce other flexible material of hair, fine fleece, fiber or filament.

This clamp device can be known from the prospectus A1 No. 3433725 (Ao Ruici people such as (Aurich)) of West Germany.Its specification has been described a kind of method and apparatus of the yarn fabric that separately stacks.But this clamp device of being known just constitutes a kind of building block of large-scale gripping equipment, and this main equipment takes up space bigger, and design is also complicated.This equipment has spring-loaded presser feet, and in the phase I of grasping manipulation, presser feet contacts with the part surface that yarn fabric stacks top layer spare, and clamp device has also contacted that of said top simultaneously.The presser feet applied pressure makes the whole distortion that stacks, thereby has produced relative displacement between each layer of top.Simultaneously the jam-packed device is to downslide, and jaw is clamped fine hair, and clamp device is with regard to the part of pull-up top layer workpiece and the other parts of top layer workpiece are still being pressed for presser feet like this.Promote whole device then, also lift from stacking up to presser feet.Separating of the weaving object of top layer below it, then be another separate air nozzle with compressed air between two-layer up and down the direction winding-up and produce.Said apparatus is used for big article originally, and is particularly suitable for having elongated fibers, is tending towards the workpiece of adhesion between aspect.This in addition known devices stays visible vestige for processed workpiece, and various types of yarn fabrics do not need to adjust jaw by gripping the time simultaneously.Use above-mentioned gripping equipment can not handle for example badge of smallclothes textile, pocket cut-parts etc., and complicated design has hindered some places that this device is applied in height-limited system, for example automatic sewing machine.

Can learn that from the expansion specification of West Germany No. 2108401 (Si Dun (Stone)) a kind of clamp device and above-mentioned clamp device have some common trait.Each chuck has one group of folder and refers to that the part that has the slit with aforementioned jaw is corresponding, and can be slidably mounted in the casing.The piston that is used in the casing promotes, and folder refers to treat the workpiece passing of gripping downwards, and the shape of casing inside can make folder refer to towards mutual passing, makes the weaving object that presss from both sides between referring to play pleat.Clamp device as disclosed above can be linked on the compressed air source, and compressed air leads to into and refers to so that allow textile be separated from folder in the final stage of operating in the casing.Because so folder refers to down towards workpiece motion s, there is following danger: folder refers to understand to leaving a trace on the workpiece, and then may pierce through workpiece.In addition, these clamp device complex structures improve processing charges.

The purpose of this invention is to provide a kind of as described clamp device, this device no longer is subjected to the anxiety of the disadvantage of known devices, promptly this device can be handled smallclothes and also can handle big part yarn fabric, simultaneously less, more cheap, design compactlyer than original device, it is more reliable to grab folder, can also handle the material of numerous species, be particularly suitable for single-piece being grasped from stack and separating.

According to the present invention, above-mentioned purpose is achieved in that by aforesaid a kind of clamp device, between its body and sliding part, there is one to be the hollow area of sealing basically, gas-pressurized feeds this hollow area via body, stretch on the edge in slit, the processing and relative arrangement of jam-packed element and/or sliding part, be following a kind of mode, make the gas-pressurized of hollow area preferably pass and emit near the slotted section of hollow area, so that leave the slit from first end of jaw.

Because hollow area is arranged, supply with compressed air or similar gas that clamp device is used, can feed hollow area from single air inlet, be assigned in several jaws from there.Sliding part moves in such a way, and the slit is crowded together, and jaw just can be clamped the fine hair on the workpiece of upper strata like this.Carve at this moment, gas-pressurized can automatically import and pass body, enters into hollow area, passes jaw by the slit again from there and discharges.This blows to regard to making gas-pressurized penetrate the workpiece on upper strata from the second layer that pushes up number, and it is fallen at once.This has just guaranteed that the upper strata workpiece effectively separates with the workpiece that is close to below, thereby has avoided each gripping above the situation more than.

According to clamp device of the present invention, in its preferred embodiment, a skirt or annular cocked bead are arranged on the body round sliding part.

For the ease of changing jaw, preferably this device is designed to the end that jaw is fixed on body and has the shape that groove, grooving or certain other section dwindle, and with latch that body is connected on a kerf is arranged, place locked position, the locking that is used for latch cooperates.Here, latch and body link in such a way: after latch unclamps, can do the motion perpendicular to the longitudinal axis of each jaw between locked position and release position, so that jaw is taken off from clamp device.

In order to divide the replacing jaw that comes, this clamp device is designed to: each jaw respectively is with a latch, and with an axle latch is rigidly connected on the control lever, this control lever be contained on the clamp device with the jaw facing surfaces on.

Further describe one embodiment of the present of invention referring now to accompanying drawing, among the figure:

Fig. 1 is the workbench of application by the clamp device of the present invention's design,

Fig. 2 is the side view and the phantom of a preferred embodiment of the invention,

Fig. 3 is the bottom view of Fig. 2,

Fig. 4 is the local section of clamp device, demonstrates the jaw with a complete set of locking device,

Fig. 5 is identical with Fig. 3, and just sliding part and jaw are taken away,

Fig. 6 is the enlarged section of jaw and jam-packed element.

A kind of preferred embodiment according to clamp device of the present invention is shown in Fig. 1, wherein, be arranged on the rotatable table top 5 by stacking 3 and the various weaving objects that come are supplied with the sewing work platform of band automatic sewing machines 1.Stack 3 and put along the periphery of table top 5, table top rotates around a vertical axis, takes the place that catching robot 7 with cantilever 8 gets to stacking 3, and the end of cantilever 8 is installed with clamp device 10.

The preferred embodiment of clamp device 10 comprises a body 12, for example is formed from aluminium, and cylinder 14 and a threaded piston rod 18 that is screwed on the sliding part 20 of having a piston 16 are installed on it, 22 lockings of sliding part 20 usefulness one locking nut.The compressed air of driven plunger motion infeeds from arm 24, is drawn towards cylinder through passage 26, and the lid 27 of band filler has sealed cylinder 14.Lid 27 can be locked by a retaining ring.

Body 12 can be established a screwed hole 28 and be used for being installed on the mechanical arm 8, and this just can make the height of contour of clamp device reduce to minimum.Also can use other installation method, for example, install with the top board that does not show, top board is installed on the body with some screws, and top board has centre bore, and a countersunk bolt stretches out from this hole, and its threaded portion upwards.For a kind of situation in back, the bolt with the center is installed in top board on the mechanical arm earlier, with remaining some screws body is fastened on the top board more afterwards.

Body 12 has an annular seamed edge 30, and it is with the edge 32 of so a kind of mode round sliding part 20, even the gap 34 between seamed edge 30 and the sliding part 20 is very little, thereby airtight relatively.On sliding part 20-and roughly be one square in the present embodiment, keeping to the side each angle of 32, a lining 36 is installed, press fit in the through hole of sliding part 20.Grasping element or jaw 38 are installed in each lining 36, block by latch 40.Otch 42 in each latch 40 can match with the grooving that is called neck 44 on each jaw 38, and nationality helps at the control lever 46 on body top can free cooperating of latch 40 and neck 44, and axle 48 couples together latch 40 and control lever 46.

The most handy brass bar of each jaw 38(is made), 4 slits 50 and a centre bore 52 are arranged.Certainly slit 50 also can be other number, especially from 2 to 6.Slit 50 and hole 52 almost arrive neck 44 places.Free end near jaw 38 has a taper seat 54, by the motion of sliding part 20, makes the inner face of the lining 36 that is installed on the part 20 or lower edge 56 promote the conical surface 54.Preferably widen gradually to reduce the wearing and tearing of lower edge 56 with the inside of the conical surface 54 immediate linings 36.For reducing friction and improving abrasion resistance, lining 36 and jaw 38 have all plated nickel dam (chemical nickel plating) with the method for chemistry.Be noted that jaw 38 is by sawing or grinds processing slit 50 and deflection becomes illustrated open configuration, so be tending towards piston 16 promotion upper positions, as seen in Figure 2.

The termination 58 best chamferings of each jaw 38, so that introduce in the pilot hole 60, to ensure jaw 38 not lateral movements.

Design by this way, will form between body 12 and sliding part 20 is the hollow area 62 of sealing substantially.Gas-pressurized such as the compressed air passage 64 in body 12 feeds hollow area 62.The another one effect of passage 64 is for hollow area 62 provides vacuum, so that through jaw 38 suction airs, the fine hair of workpiece is sucked up.

The action function of clamp device is as follows: be installed on the mechanical arm 8 clamp device 10 by band come with table top 5 on workpiece stack 3 and contact.Provide vacuum through passage 64 like that by the front is said subsequently.The compressed air that comes from the source of the gas of automatic control charges into the cylinder 14 then, promoting piston 16, and promotes sliding part 20 and moves down as shown in Figure 2, thereby make lining 36 close jaw 38.So just clamped the fine hair on the workpiece, and then charged into compressed air to hollow area 62 through passage 64.Owing to total hydrodynamic drag ratio of the slit 50 of passing close hollow area 62 and centre bore 52 is little around the slit 34 corresponding resistances of sliding part 20, so compressed-air actuated major part arranging from jaw 38 by centre bore 52 and slit 50 by the lower part.When jaw 38 clamped pile up in during the top layer workpiece, have some air to pass the top layer workpiece and blow to be sprayed onto and (stacking on 3) on the workpiece of its bottom, thereby these two are separated.At the same time, mechanical arm 8 is mentioned the clamp device 10 with workpiece, and workpiece is placed on sewing machine 1 time.Clamp device 10 moves upward by piston 16 and unclamps workpiece, and as shown in Figure 2, then, jaw 38 returns to its open configuration.As previously mentioned, by jaw 38 air of jetting, also can assist and carry out this operation.

According to this device of the present invention, also can adopt other form, for example, when handling than big article, several clamp devices are arranged along a rod member, can from clot, be pulled out material, or according to the difformity of pending weaving object and clamp device is arranged into different geometries.

The present invention can have other embodiment certainly, and for example clamp device can be columniform, and corresponding locking device can be the flat circle ring of band chucking otch, has the hole bigger than incision size, so that allow chuck pass through.

Claims (4)

1, the clamp device that is used for the villous workpiece, comprise a body, one or more jaws, the parts that slide of body relatively, the element that has each jaw of jam-packed on it, jaw are the elongated bodily form, near the zone of jaw first end, for adapt to contacted with workpiece the jam-packed element around, and have the slit along the jaw y direction; And jaw second end is fixed, to stop jaw with respect to body translational motion longitudinally, slit on the jaw because of sliding part towards workpiece motion s by jam-packed, it is characterized in that: between body and sliding part, have one to be the hollow area of sealing basically, the gas of pressurization feeds this hollow area through body, and stretch on the edge in slit, jam-packed element and/or sliding part are processed as follows and are arranged: mainly pass the slit of close hollow area at the gas-pressurized of hollow area and discharge, leave the slit from first end of jaw.

2, clamp device according to claim 1 is characterized in that: body has a skirt or annular cocked bead round sliding part.

3, clamp device according to claim 1, it is characterized in that: the end place that jaw is fixed in body processes the shape that groove, grooving or certain other section dwindle, and be connected on the latch on the body a kerf is arranged, be used for latch and lock cooperation, latch and body link in such a way, after latch unclamps, can between locked position and release position, do motion, from clamp device so that jaw is taken off perpendicular to the longitudinal axis of each jaw.

4, clamping device according to claim 1 and 2, it is characterized in that: each jaw respectively has a latch, and nationality helps an axle latch and a control lever is rigidly connected, control lever then be placed on this clamp device with the jaw facing surfaces on.

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