CN1046867A

CN1046867A - The Workpiece detecting device that the workpiece feed apparatus is used

Info

Publication number: CN1046867A
Application number: CN90102398A
Authority: CN
Inventors: 青山好高
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-04-25
Filing date: 1990-04-25
Publication date: 1990-11-14
Also published as: GB2232297A; KR900015849A; DE4012918A1; GB9009083D0

Abstract

One wherein workpiece be that a feed bar keeps and can be delivered in the workpiece feed apparatus of an intended destination, utilize incompatible connection one circuit of touching of this workpiece and feed bar.Detect in view of the above this workpiece already for this reason feed bar keep.

Description

The Workpiece detecting device that the workpiece feed apparatus is used

The present invention relates to a kind ofly be used for detecting whether firm being located in the parts feed apparatus of a workpiece, and the latter has a feed bar, can be used to keep a workpiece and can be transported to a predetermined destination to it.

In this base part feed apparatus with the feed bar that can be used for keeping a workpiece and it is transported to the destination, known needs go to check whether have workpiece on the precalculated position.Be to utilize the weight of workpiece to start a microswitch one of in the known method, another then is that phototransistor is used for this kind detection.But, owing to will be assembled to the accurate device of microswitch or the brilliant pipe of photoelectricity and so on the feed apparatus, will make structure complicated, and because the accuracy of this class device also can be subjected to the influence of foreign matter.

In order to address the above problem, but plan of the present invention detects the existing problems of a workpiece by the electric conductivity between two workpiece, and this electric conductivity then realizes when having a workpiece to remain on the feed bar.In other words, owing to have a workpiece to remain on result on the feed bar, but the fusion of this workpiece and feed bar and the electric conductivity between the two have just constituted circuit, and the signal of telecommunication that can represent a parts voltage just is provided thus.On the contrary, if this circuit is in off-state, just means that workpiece is not maintained rightly, that is have abnormal phenomena.

According to the present invention, owing to be, just can exempt the sort of accurate device that adopts in the prior art by the incompatible testing circuit of finishing of touching of a feed bar and a workpiece, so just realized the function of certainty highly reliably.Particularly owing to effectively utilize feed bar and a workpiece and directly touch mutually and close, and guaranteed to reach said effect.

One insulating part is fixed to an outer inner surface that puts of admitting this feed bar, is used for being attached to this insulating part for the slide plate of this feed bar electrical conduction with one simultaneously, make this slide plate touch with the outer surface of this feed bar all the time and close.In addition, the desirable form of sleeve of above-mentioned insulating part and make feed bar pass wherein.The form of sleeve has been improved the stability to the insulating part supporting, and allows installing next group slide plate, improves the stability to the feed bar conduction greatly.Because being attached with the insulating part of slide plate above this is to be fixed on the inner surface of aforementioned overcoat, the supporting stability of slide plate just is improved, and has been reliably usually just also and give feed bar with electrical conduction.By insulating part being taked allow feed bar pass wherein form of sleeve, but promptly improved the supporting of feed bar and a collection of slide plate can be set, so just can conduct electricity more reliably.If the pressure piece of a close fit in above-mentioned urceolus aperture is used on the former, fix aforesaid insulating part whereby, then the insulating part of this cover tubular just can be held in place satisfactorily, and makes slide plate obtain firm supporting.

Fig. 1 is the profilograph with workpiece feed apparatus of the checkout gear that embodies the present invention;

Fig. 2 is the bottom view of the equipment among Fig. 1;

Fig. 3 is the profilograph of a part;

Fig. 4 is the end-view of a feed bar;

Fig. 5 is the profilograph of a part;

Fig. 6 is the profilograph of a part;

Fig. 7 is the profile along VII among Fig. 6-VII line intercepting;

Fig. 8 is the perspective view of an overcoat;

Fig. 9 is the drawing in side sectional elevation that shows a cover tubular insulating part;

Figure 10 is the side view that installs among Fig. 9, has wherein removed pressure plare, and

Figure 11 and 12 is local profilographs.

Fig. 1 and 2 shows and understands a kind of like this parts feed apparatus, and it has a feed bar 2 that is fit to insert screwed hole in the nut 1, is used for this nut 1 of feeding.The workpiece service pipe 3 of rectangular cross section is provided with an aperture 4 at its downside, and is provided with a temporary fixed chamber 5 in one end upside.The right-hand member of this temporary fixed chamber 5 is by a baffle plate 6 sealings.The upper surface of workpiece service pipe 3 is arrived in overcoat 7 seam, and entangles feed bar 2.Feed bar 2 comprises a thin guide rod 8, and the latter can be thick mobile jib 9 than this guide rod by the screwed hole in the nut 1 and, and defines pushing surface 10 outside at the interface of these two bars 8 and 9.This feed bar 2 is advanced with returning by the power output of an air cylinder 11 of linking overcoat 7 and removes, and in this case, the piston rod of this air cylinder is a mobile jib 9.The upper surface of parts service pipe 3 has a through hole 12, and to mobile jib 9 is passed through wherein, the position of this through hole stands facing each other mutually with an insulating part 13 greatly.Be equipped with a permanent magnet 14 in the baffle plate 6, protective plate 15 and 16 are stamped in the two opposite sides of this baffle plate.Be welded with an arm 17 on the overcoat 7, the latter is screwed with a bolt 18 and promotes baffle plate 6.Mobile jib 9 is a flexibly contact of slide plate 19 dos as electric contact consistently, and this slide plate 19 is fixed on the overcoat 7 by an insulating part 20, has a lead 21 to be connected to the outwards outstanding ends of slide plate 19 on this insulating part.Other has a lead 22 to link on the baffle plate 6.

In Fig. 1, nut 1 temporarily is locked in the temporary fixed chamber 5, is magnet 14 and has attracted, and what this feed bar 1 was shown in the figure removes to the limit position for its time.Along with the action of this feed bar 2 for air cylinder 11 advances, guide rod 8 just stretches by the screwed hole of nut 1, and pushing surface 10 closely touches certain position of closing surface on the nut 1 outside arrival makes.At this moment, the electric current of lead 21 just reaches baffle plate 6 through nut 1 from feed bar 2, constituted the circuit that leads to lead 22.Such closed circuit shows and wherein has a nut 1, and this nut is to remain on rightly in the feed bar, can affirm that promptly this has been a kind of normal state.

If above-mentioned nut 1 is because of in certain cause the is not in temporary fixed chamber 5, although then feed bar 2 advances, and no current is by lead 21 and 22, and this fact promptly shows and has abnormality.Must note not starting the machine of any associated, for example projection welder this moment.

Fig. 3 and 4 shows bright a kind of remodeling, and the difference of it and a last embodiment is that nut 1 has a lid 23.In this example because it can not make guide rod pass through nut, as clearly shown in Figure 4, so the front end of feed bar 2 is got the fork form, constitute a pair of jut 24 and 25 so that nut 1 remain in therebetween.Become nut 1 blocking surface baffle plate 6 that part of 1 above with an insulating part 26.Under state shown in Figure 3, this circuit was not connected.But when feed bar 2 slightly pushes away when preceding, nut 1 promptly separates with insulating part 26 and contacts with the metal surface of baffle plate 6, makes electric current flow through between lead 21 and 22.If nut 1 fails to obtain position shown in the figure, then after embodiment advances like that as described above already, immediately abnormality can appear at feed bar 2 certainly.

In remodeling shown in Figure 5, slide plate 19 is replaced by an insulating part 27 that inserts 11 of overcoat 7 and air cylinders, and has a lead 21 to be connected on the air cylinder 11.So,, between lead 21 and 22, promptly established the conduction of electric current when feed bar 2 and nut 1 touch fashionablely.

To describe the electric current conduction below improved remodeling on the further structure arranged.

In the remodeling shown in Fig. 6 and 7, slide plate was attached on the made insulating part 23 with arc-shaped cross-section of synthetic resin in 24 years, and this insulating part 23 is fixed on the inner surface of overcoat 7 by bolt 25.The part of slide plate 24 is press-fit into or is pressed in the insulating part 23 with press moulding mode, and its evagination part then flexibly contacts with mobile jib 9.This slide plate 24 is made by all superior copper alloy of elasticity and electric conductivity, and as shown in the figure, is welded with lead 21 above.Fit into an insulation sleeve 7 in the through hole that is formed at overcoat 7, said lead 21 is then drawn in the above-mentioned insulation sleeve of process.

In the remodeling shown in Fig. 8 to 10, this insulating part 23 is the cover tubular, is fit to insert in the overcoat 7 in the formed aperture 27.Shown in Fig. 9 and 10, in this cover tubular insulating part 23, be combined with a metallic sheath 28.There is a collection of slide plate 24 integrally to extend, and does to electrically contact with mobile jib 9 from an end of metallic sheath 28.Process a breach 29 in the insulating part 23, metallic sheath 28 is exposed so that lead 21 welds thereon.This insulating part 23 inserts in the pressure piece of an aperture 27 and an arc section, this pressure piece is a pressure plare 30, and it cooperates with aperture 27 by this way, and aperture 27 is covered, subsequently, the fixed cover that is in a side 31 shown in chain-dotted line among Fig. 8 promptly moves and covers pressure plare 30.Afterwards, a bolt 32 is screwed in the fixed cover 31, promotes pressure plare 30 and make the insulating part fix in position.Can act on reliably on the insulating part 23 in order to ensure this motive force, a gap 33 should be set between overcoat 7 and pressure plare 30, franchise is provided during for pressurization.

In the remodeling shown in Figure 11, the inside of overcoat 7 is provided with one for overlapping the stage portion 34 that the tubular insulating part is cooperated, and this insulating part is with tapering part 36 fix in position of a bolt 35 from the outside.

In remodeling shown in Figure 12,23 of cover tubular insulating parts are with two bolt 37 fix in position from the outside.21 in lead is connected on the metallic sheath 28 by a bolt 39.

Though above description is at nut, by the shape of change work feed pipe, but also feeding bolt.The workpiece that can be handled is not limited by the narration here.

Claims

1, the Workpiece detecting device that is used for the workpiece feed apparatus wherein uses the following fact: as a workpiece is that feed bar keeps and the former with the latter touches fashionablely mutually, and circuit is connected, just can detect thus this workpiece already for this reason feed bar normally maintain.

2, the Workpiece detecting device that is used for the workpiece feed apparatus according to claim 1 wherein has an overcoat to cover above-mentioned feed bar, is fixed with an insulating part on the inner surface of this overcoat, then is attached with a slide plate that is used for to the feed bar conductive electric current on this insulating part.

3, as being used for the Workpiece detecting device of workpiece feed apparatus as described in the claim 2, wherein said insulating part is got form of sleeve, and feed bar is then by wherein.

4, as described in claim 3, be used for the Workpiece detecting device that workpiece feeds equipment, wherein a formed aperture in the aforementioned overcoat be combined with a pressure piece, and make said insulating part fixing by this pressure piece.