CN1342898A - Foreign body testing device using x-ray - Google Patents

Foreign body testing device using x-ray Download PDF

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Publication number
CN1342898A
CN1342898A CN01132552A CN01132552A CN1342898A CN 1342898 A CN1342898 A CN 1342898A CN 01132552 A CN01132552 A CN 01132552A CN 01132552 A CN01132552 A CN 01132552A CN 1342898 A CN1342898 A CN 1342898A
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CN
China
Prior art keywords
ray
detecting
conveyor
article
foreign
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CN01132552A
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Chinese (zh)
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CN1193223C (en
Inventor
宇野正幸
株本隆司
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株式会社石田
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Priority to JP266525/00 priority Critical
Priority to JP2000266525A priority patent/JP2002071588A/en
Priority to JP266525/2000 priority
Application filed by 株式会社石田 filed Critical 株式会社石田
Publication of CN1342898A publication Critical patent/CN1342898A/en
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Publication of CN1193223C publication Critical patent/CN1193223C/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material

Abstract

The invention provides an X-ray foreign-matter inspection device which can prevent the leakage of X rays to the outside from the inspection device caused by the misoperation of an X-ray source 3 when the inspection device is partially opened and, accordingly, the X rays are unshielded. This X-ray foreign-matter inspection device inspects an article M with X rays from the X-ray source 2 for foreign matters contained in the article M while the article M is carried on a transportation conveyor 2. The device is provided with an open detector 4 which detects that the inspection device is partially opened and X rays are externally unshielded, and a projection stopping means 6 which stops the projection of the X rays from the X-ray source 3 based on the unshielded state of the X rays detected by means of the detector 4.

Description

The X ray foreign body detecting device

Technical field

The present invention relates to not only can be to the metallic foreign body that contained in the article and the X ray foreign body detecting device that can detect non-metal foreign body.

Background technology

Existing X ray foreign body detecting device is that conveyor and x-ray source are set in device body, utilizes the x-ray bombardment of this x-ray source emission to carry out inspection of foreign substance with the article of conveyor delivery.In addition, when conveyor is dirty, externally carry out clean-out operation after whole or belt is pulled down with it.

But, forget after carrying out clean-out operation conveyor or belt reinstalled and to be under the state that the part of device opens wide that if maloperation and x-ray source is connected, then X ray might leak into the outside from the unlimited position of device.

Summary of the invention

For this reason, the purpose of this invention is to provide a kind of X ray foreign body detecting device that can prevent the X ray in the locking apparatus to external leakage effectively.

For achieving the above object, the of the present invention the 1st to constitute related X ray foreign body detecting device be the X ray foreign body detecting device that a kind of X ray that utilizes the x-ray source emission when article are carried with conveyor is checked the foreign matter in the article, possess: can open wide and X ray externally is in the unlimited detecting device that non-shielding state detects the part of device, and make the irradiation shut-down mechanism that stops to shine from said x-ray source X ray according to the detection that said X ray non-shielding state is carried out.

As this testing fixture, when the part of device is opened wide and when being in the X ray non-shielding state, unlimited detecting device just detects non-shielding state, and the irradiation shut-down mechanism is exported in view of the above and x-ray source is quit work automatically, also can not launch X ray even mistake is connected the operation of x-ray source.Its result can avoid X ray externally to leak from the unlimited position of device.

Preferably, the power switch that can make it to disconnect by said irradiation shut-down mechanism is installed between said x-ray source and power supply.According to such formation, can be according to the detection of said detecting device output by the irradiation shut-down mechanism power switch is disconnected, directly cut off power supply automatically to x-ray source, therefore, can prevent the leakage of X ray more effectively and make the reliability raising.

The of the present invention the 2nd to constitute related X ray foreign body detecting device be the X ray foreign body detecting device that a kind of X ray that utilizes the x-ray source emission when article are carried with conveyor is checked the foreign matter in the article, possess: device body with the 1st and the 2nd peristome, open wide detecting device, and X ray shielding slide; The front and back that the said the 1st and the 2nd peristome is arranged on the throughput direction of conveyor delivery article also can make two ends of the conveyor that freely carries out dismounting stretch out, said unlimited detecting device is in said peristome opening-wide state detecting to predict when said conveyor is pulled down state, and said X ray shielding slide is according to predicting of said opening-wide state and with said peristome sealing.

According to this testing fixture, when said peristome was in opening-wide state, unlimited detecting device promptly predicted this opening-wide state, X ray shielding slide seals peristome in view of the above, therefore, even the action that mistake is connected x-ray source can prevent that also the reflected ray of X ray and diffusion ray are to external leaks.And, as X ray shielding slide, not X ray that x-ray source is launched but to shielding at the faint X ray that device is inner after reflecting, therefore, constitute with thin and simple structure and to get final product.

Said unlimited detecting device for example is to detect the non-existent status detection device of said conveyor.Thus, forget that when conveyor is pulled down when it is reinstalled, x-ray source will quit work automatically and can not launch X ray after carrying out clean-out operation, therefore, can prevent that X ray is via space that conveyor uses being installed to external leaks.

In addition, said unlimited detecting device also can be to be in the detecting device that the omission article outside the x-ray bombardment scope on the Width on the said conveying machine side detect at least a portion, at this moment, be provided with the alarm mechanism of reporting to the police based on predicting said omission article.According to this formation, said unlimited detecting device not only can be used for preventing the leakage of X ray, and, in the conveyor delivery article, carry out in the process of X-ray examination, when at least a portion that article occur outside the x-ray bombardment scope of conveyor when failing to carry out the omission article of X-ray examination, can also detect this omission article.When detecting these omission article, report to the police by alarm mechanism, therefore, can prevent from that omission article and good article from mixing to dispatch from the factory.

The detecting device that said unlimited detecting device can also detect as the change of the agreement when changing working routine.In view of the above, approximately regularly for example change as the occasions such as article of checking object, when agreement request button is operated, x-ray source is quit work automatically in change.Therefore, not only can avoid x-ray source to carry out meaningless irradiation, and the problem that does not have X ray to leak.That is, in change approximately regularly, do not carry out the conveying of article, nor carry out the X-ray examination of article, therefore x-ray source is quit work at this moment, can avoid the meaningless irradiation of X ray and external leakage.

The related X ray foreign body detecting device of the 3rd invention of the present invention is the X ray foreign body detecting device that a kind of X ray that utilizes the x-ray source emission when article are carried with conveyor is checked the foreign matter in the article, possess: have the device body of the 1st and the 2nd peristome, and X ray shielding slide; The the said the 1st and the 2nd peristome be arranged on the conveyor delivery article throughput direction front and back and two ends of the conveyor that freely carries out dismounting are stretched out, said X ray shielding slide produces mechanical interlock along with the dismounting of said conveyor and with said peristome sealing.

According to this testing fixture, when conveyor is pulled down and said peristome when opening wide from device, X ray shielding slide produces mechanical interlock along with this dismounting and peristome is sealed, therefore, even the action that mistake is connected x-ray source, also can prevent the reflected ray of X ray and diffusion ray from the peristome of device to external leaks.And, as X ray shielding slide, not X ray that x-ray source is launched but to shielding at the faint X ray that device is inner after reflecting, therefore, constitute with thin and simple structure and to get final product.

As best form of implementation of the present invention, be provided with in the front and back of the throughput direction of said conveyor or said x-ray bombardment position thereunder and prevent the X ray shield member that leaks of direction forwards, backwards.Constitute according to this, when the foreign matter in the article being checked, utilize the shield member of the front and back that are arranged on the x-ray bombardment position can prevent X ray direction leakage forwards, backwards on irradiation X ray limit, limit.

As other best form of implementation of the present invention, below said conveyor, be provided with the water receiving parts that are inclined relative to horizontal, above the freeing port of the outside draining on the said water receiving parts, be provided with the barricade that this freeing port is shielded with respect to X ray.According to this formation, when carrying out such as operations such as conveyor cleanings, rinse water concentrates in the water receiving parts back and focuses on outside both allocations and discharge from freeing port.Though and the external opening of this freeing port because the freeing port place is provided with the X ray barricade, therefore, by this barricade can prevent X ray from freeing port to external leaks.

The simple declaration of accompanying drawing

In the accompanying drawing, the same component part numbers in a plurality of accompanying drawings is represented with a part.

Fig. 1 is a stereographic map of showing the X ray foreign body detecting device of the present invention's the 1st form of implementation.

Fig. 2 is the front view of this testing fixture.

Fig. 3 is a block diagram of showing the control part of x-ray source being controlled with detecting device.

Fig. 4 is the side view of employed conveyor in this testing fixture.

Fig. 5 is the vertical view of this conveyor.

Fig. 6 is arranged on the stereographic map of X ray shielding curtain at the peristome place of device body.

Fig. 7 (A) is a side view of showing the X ray foreign body detecting device of the 2nd form of implementation, (B) is its front view, (C) is the side view of major part that principle of work is described.

Fig. 8 (A) is a side view of showing the X ray foreign body detecting device of the 3rd form of implementation, (B) is the side view of major part that principle of work is described.

Fig. 9 is a front view of showing the modified example of opening wide detecting device.

Figure 10 is a front view of showing other modified example of opening wide detecting device.

The detailed description of form of implementation

Below, to form of implementation of the present invention in conjunction with the accompanying drawings.

Fig. 1 is the stereographic map that the one-piece construction summary of the related X ray foreign body detecting device of form of implementation of the present invention is showed.This testing fixture has: in the inside of device body 1 at a conveyor 2 of the flexible that the centre disposed of above-below direction, the central part of the Width of the conveyor 2 in device body 1 top disposed, to the article M irradiation X ray that is transferred with to being included in the x-ray source 3 that metal among the article M or non-metal foreign body are checked.Said conveyor 2, be used for article M is carried to throughput direction (the place ahead) F, the length of fore-and-aft direction RF that is designed to ratio device body 1 is long, with the state as the peristome 11 protruding parts of 1st and 2nd opening of its two ends from the two sides, front and back that is formed at device body 1, be installed in removably in the device body 1.

On a sidepiece of the left and right directions of said device body 1, be formed with and be used for being taken to outside conveying ends 12 with conveyor 2 is whole, articulated X ray shield door 13 to be opened/closed is installed on this conveying end 12.Among the figure, the 5th, the controller of whole device, the 16th, the touching-type monitor of display operation during inspection of foreign substance, the 17th, the display of the fluoroscopy images of demonstration X ray.The 18th, the leaded banded X ray that falls in the softness at peristome 11 places down shields curtain, is made of a plurality of curtain sheet 18a.

Fig. 2 is the front view of device body 1.When said conveyor 2 is not installed, that is, for safeguard or change and with conveyor 2 when the set installation site of device body 1 disassembles, the part of device body 1, for example the part of conveyor 2 belows will be opened wide, and X ray externally is in non-shielding state.For this reason.Be provided with on the top of conveyor 2 can predict this non-shielding state, unlimited detecting device 4 such as for example range finding type infrared ray sensor or laser sensor.As this unlimited detecting device 4, detection distance (to the distance between the below of conveyor 2) when the detection distance (distance between conveyor 2) when existing with conveyor is compared conveyor 2 and do not existed will be grown and predict said non-shielding state, and forcibly makes said x-ray source 3 stop to shine X ray automatically according to this detection signal.In this form of implementation, be provided with two unlimited detecting devices 4 outside the x-ray bombardment scope A of said x-ray source 3 with on two end upper positions in opposite directions of the Width of conveyor 2, the said non-shielding state when predicting conveyor 2 and do not exist by these unlimited detecting devices 4,4.X-ray bombardment scope A sees past tense from fore-and-aft direction FR, is that the upper surface of summit, conveyor 2 is the triangle scope on base with x-ray source 3.

Said each unlimited detecting device 4, for the article M that carries on the said conveyor 2, can also detect than conveyor 2 that distance is short to predict that at least a portion that whether is in article M is positioned at outside the x-ray bombardment scope A and the omission state that is not subjected to X-ray examination according to the detection of article M distance.Be provided with the test section 20 that the X ray from x-ray source 3 is detected below the said conveyor 2 with on x-ray source 3 position in opposite directions.

Fig. 3 is the block diagram of the control section controlled with 4 pairs of x-ray sources 3 of said unlimited detecting device.Among this figure, be provided with x-ray bombardment shut-down mechanism 6 in the controller 5, the input end of this controller 5 is connected with said unlimited detecting device 4, and output terminal is connected with the alarm mechanisms such as hummer 7 of reporting to the police when unlimited detecting device 4 detects the omission article.As this alarm mechanism 7, also can make said radioscopy image glittering to report to the police with display 17.In addition, between said x-ray source 3 and its power supply E power switch SW1 is housed, the break-make of this power switch SW1 is by x-ray bombardment shut-down mechanism 6 controls of said controller 5.

Like this, when said unlimited detecting device 4 detected the non-shielding state of device body 1, the x-ray bombardment shut-down mechanism 6 by said controller 5 cut off power switch SW1, automatically power supply E is directly cut off to the power supply of x-ray source 3.Promptly, under with the state of x-ray source 3 with other manual or automatic main switch SW0 cut-out, pull down and forget after the operations such as conveyor 2 cleans when it is installed again, even closed main switch SW0, the output of carrying out based on the detection of said unlimited detecting device 4 owing to x-ray bombardment shut-down mechanism 6 quits work x-ray source 3, therefore, X ray can not take place from peristome 11 grades of device body 1 situation to external leaks.

In addition, carry out in the process of X-ray examination with said conveyor 2 articles conveyed M limits on the limit, when at least a portion that article M occurs outside the x-ray bombardment scope A of conveyor 2 when failing to carry out the omission article of X-ray examination, these omission article can be detected by said unlimited detecting device 4.When this unlimited detecting device 4 detects the omission article, under the control of the output of controller 5, report to the police by alarm mechanism 7, therefore, can prevent from that omission article and certified products from mixing to dispatch from the factory.Except this alarm mechanism 7, can also be provided with and to inform other alarm mechanism that detects the omission article.

In the form of implementation of this figure, between said x-ray source 3 and its power supply E than the more close power supply E of power switch SW1 place, be provided with the door switch SW2 that can predict X ray shield door 13 opening and closing movements, when said door 13 is opened, can automatically power supply E directly be cut off to the power supply of x-ray source 3 with door switch SW2 without said controller 5.

In addition, said unlimited detecting device 4 also can be the occasion of change agreement when changing working routine when action button is operated, and can predict the detecting device of this operation.Like this, for example change the occasion that the commodity of object are checked in conduct in the change agreement, x-ray source 3 will quit work automatically.Specifically, by pressing agreement request button, x-ray source 3 is quit work.And by pressing the operation button that is arranged on the display 16 (Fig. 1), x-ray source 3 can shine once more.Therefore, not only can prevent that x-ray source 3 from carrying out meaningless irradiation, and not have the problem of X ray external leakage.That is, change is not approximately regularly carried out the conveying of article M, does not carry out the X-ray examination of article M yet, therefore, x-ray source 3 is quit work at this moment, can prevent the meaningless irradiation of X ray and to external leakage.

Fig. 4 is the side view of said conveyor 2, and Fig. 5 is its vertical view.Conveyor 2 has: conveyor frame 21, driven roller of supporting with driving shaft 22a at the two ends of its fore-and-aft direction 22 and the driven voller of supporting with driven shaft 23a 23, and the conveying that is made of the ring-shaped flat belt on the periphery that is hung around these rollers 22,23 is with belt 24.Said conveyor frame 21 is made of the frame body 21a of longer dimension and the short small frame 21b of size that is arranged on its rear end one side, and the warpage fulcrum 25 that this small frame 21b can extend with direction to the left and right be that the center is supported with respect to frame body 21a easy on and off warpage ground.In addition, front portion one side below said flat belt 24, be provided with the driver element 30 that has such as the such power source 30a of motor, driving wheel 30b in being arranged at this driver element 30 and being located between the driving wheel 22b on the said driving shaft 22a around hanging with endless-belt 30c advances flat belt 24 rotations by driving shaft 23a.In this form of implementation, be provided with inner face top board 21c in opposite directions with flat belt 24 in the top of said frame body 21a and small frame 21b one side.

In addition, in this form of implementation, axle 23a to said driven voller 23 supports with respect to small frame 21b movably forward and backward enabling, and, the screw rod 27 that can rotate freely is installed on this small frame 21b, screwing between plate on this screw rod 27 28 and said axle 23a, be provided with the spring 29 that driven voller 23 is pushed to foreign side's side (rear side).Like this, when when the said screw rod 27 of operation plate 28 being moved forward and backward with respect to small frame 21b, driven voller 23 moves forward and backward under the effect of spring 29, can adjust the length between driven voller 23 and the driven roller 22 thus.Its result, dispersed even the length of flat belt 24 exists, the tension force that this belt 23 can obtain being fit to and articles conveyed well M.

Below the connection straight line L between the axis of rotation of said warpage fulcrum 25 each roller 22,23 when frame body 21a shown in Figure 4 and small frame 21b are linearly.Like this, when small frame 21b was in line shape with respect to frame body 21a, under the effect of the elastic recovering force of flat belt 24, it was axial top warpage that small frame 21b always trends towards with warpage fulcrum 25.At this moment, small frame 21b contacts with the top board 21c of frame body 21a side, makes said small frame 21b warpage upward be prevented from.In addition, because said warpage fulcrum 25 is positioned at the below of said axis of rotation, so said small frame 21b warpage downwards not.Its result, under the effect of the elastic recovering force of said flat belt 24, frame body 21a and small frame 21b support to be in line attitude with being stabilized, can with article M reliably forwards F carry.

When carrying out inspection of foreign substance, shown in the solid line of Fig. 4, make frame body 21a and small frame 21b linearly, and make drive and driven voller 22,23 on also linearly around the flat belt 24 of extension, and be installed in as illustrated in fig. 1 in the device body 1.Afterwards, the article M that said flat belt 24 is carried is subjected to the irradiation from the X ray of x-ray source 3, and the foreign matter among the article M is checked.In addition, when carrying out clean-out operation in that conveyor 2 is taken out, shown in the double dot dash line of Fig. 4, making said small frame 21b serves as axial below warpage with respect to frame body 21a with warpage fulcrum 25, makes the entire length of conveyor 2 shorten to the front and back width weak point of conveying end set on the ratio device body 1 12 (Fig. 1).Afterwards, the mobile limit of adjustment that carry out on the fore-and-aft direction on conveyor 2 whole limits is taken out from said conveying end 12, just can at an easy rate conveyor 2 be taken out from device body 1.Similarly, the conveyor 2 that cleans up also can be installed in the device body 1 at an easy rate.That is, the conveyor 2 that will shorten through warpage is put into device body 1 from conveying end 12, small frame 21b is rotated upward and return to and frame body 21a between be in line on the original position of shape.

In Fig. 4 and Fig. 5, in the middle part of the length direction of the frame body 21a of said conveyor 2, be positioned at the front and back position of X ray by the 2a of portion of the X ray institute irradiation position of x-ray source 3 emissions, there are two to prevent that X ray and diffusion ray thereof to the 1st shield member 81,81 of the fore-and-aft direction leakage of device body 1, are installed on the said frame body 21a with the state that transversely extends along whole width at conveyor 2.In addition, position, the front and back top of set X ray test section 20, the x-ray bombardment position below said conveyor 2, have with install at the state that transversely extends of conveyor 2 generally along whole width, prevent two the 2nd shield members 82,82 that X ray and diffusion ray leak to the fore-and-aft direction FR of conveyor 26.

And, between said X ray test section 20 and drive source 30, be equipped with support that double as supports with said frame body 21a the rearward end of this drive source 30, L-shaped the 3rd shield member 83 roughly, utilize the 3rd shield member 83 to prevent that X ray and diffusion ray from leaking from fore-and-aft direction FR.The sheet material that said the 1st~the 3rd shield member 81~83 is made by for example stainless steel that X ray is had good shield effectiveness forms.Like this, when the foreign matter among the article M is checked, can pass through each shield member 81~83, prevent that effectively the diffusion ray shoots of generation is to all the winds leaked with the peripheral part collision for the X ray of coming from x-ray source 3 irradiation and this X ray.

In addition, as shown in Figure 2, the lower portion of the conveyor 2 in said device body 1, be provided with upwardly extending with the perpendicular right and left of its throughput direction, be inclined to the lower water receiving parts 9 in left side, above the freeing port 91 of the formed opening downwards in bottom position of the diapire of these water receiving parts 9, the barricade 92 that tilts to the lower right that this freeing port 91 is carried out the X ray shielding is installed.When device body 1 is cleaned, rinse water focus in the water receiving parts 9 back from freeing port 91 to outside drain.Freeing port 91 is only externally opened wide when cleaning usually, and owing to be provided with barricade 92 near this freeing port 91, leaks into the outside so can prevent X ray and diffusion ray from freeing port 91.

The three-dimensional icon of the mounting portion of the X ray shielding curtain 18 of Fig. 1 is in Fig. 6.Shielding curtain 18 is made of the strip-shaped parts of a plurality of leaded softnesses, they are installed on the framework 19 that the broad ways of constituent apparatus body 1 extends by securing member 18a such as mounting screws, between the rising wood (Fig. 1) of this framework 19 and said peristome 11, be provided with and predict shielding curtain 18 and break away from and be used for this curtain 18 is installed in unlimited detecting device 40 on the peristome 11.In illustrated form of implementation, used the limit switch that constitutes by male and female switch 41,42 as said unlimited detecting device 40, female switch 41 wherein is configured on front and back two walls of device body 1, and male switch 42 is configured on the framework 19, by these two kinds of switches 41,42 said curtain 18 is installed on the peristome 11 removably.That is, this limit switch 40 is gone back double as and will be shielded curtain 18 and be supported in parts on the device body 1.

Said unlimited detecting device 40 and aforementioned field contract sample are connected on the power switch SW1 through the irradiation shut-down mechanism 6 of the controller 5 of Fig. 3.Like this, when said curtain 18 was separated from oral area 11, therefore x-ray bombardment shut-down mechanism 6, can not take place from the situation of said peristome 11 to the external leaks X ray based on the detection of said unlimited detecting device 40 and the output of carrying out quits work x-ray source 3 automatically.

Fig. 7 (A)~(C) illustrates the 2nd form of implementation.In this form of implementation, when conveyor 2 is pulled down from device body 1, be arranged on the two sides, front and back of device body 1 and be positioned at peristome 11,11 on the transport path that forms by conveyor 2 by 51 sealings of X ray shielding slide.That is, in Fig. 7 (A), on the two sides, front and back of device body 1, be equipped with and be used for the X ray shielding slide 51 of closed peristome 11, and drive these slide 51 foldings such as the such slide driving machine 52 of cylinder.After conveyor 2 was pulled down from device body 1, the zone below peristome 11 places shield curtain 18 was at least opened wide, and is in the state of the external non-shielding of X ray.According to the unlimited detection signal that predicts the unlimited detecting device 4 of this state, the drive controlling mechanism 53 in the controller 5 makes slide driving machine 52 make closing motion, makes X ray shielding slide 51 drop to detent position with peristome 11 sealings.X ray shielding slide 51 shown in Fig. 7 (B), be subjected to being fixed on the left and right sides on the device body 1 guiding parts 54 guiding and above-below direction moves.

According to this formation, shown in Fig. 7 (C), conveyor 2 pulled down and peristome 11 when being in opening-wide state, open wide detecting device 4 and predict this opening-wide state, X ray shielding slide 51 is in view of the above with peristome 11 sealings, therefore, though the action that mistake is connected x-ray source 3, also can prevent X ray that x-ray source 3 launched at the X ray of device internal reflection or diffusion from peristome 11 to external leaks.And, as X ray shielding slide 51, not to from the X ray of x-ray source 3 but to shielding at the inner faint X ray that reflects of device, therefore make thin and simple structure gets final product.

Fig. 8 illustrates the 3rd form of implementation.In this form of implementation, after conveyor 2 is pulled down from device body 1, peristome 11 is sealed with the X ray shielding slide 61 that produces mechanical interlock along with this dismounting.Promptly, in Fig. 8 (A), two sides, front and back at device body 1, be provided with and be used for the X ray shielding slide 61 of closed peristome 11, simultaneously, the anterior guiding parts 62 that the slide 61 that is used for to the front portion is led up and down is installed on the driver element 30 of below of conveyor 2, and the rear portion guiding parts 63 that the slide 61 that is used for to the rear portion is led up and down is installed on the X ray test section 20.On each guiding parts 62,63, be formed with the guide part 64,65 that constitutes by gathering sill, anterior gathering sill 64 have horizontal component and from its rear end towards the vertical component of top opening, the gathering sill 65 at rear portion has horizontal component and from the vertical component of its front end towards the top opening.

The horizontal component that on the X ray of front and back shielding slide 61, can be attached thereto the holding section 71,72 of another end of rod member 67,68 of knot and gathering sill 64,65 with an end with rotating freely fasten and forwards, backwards direction FR move, and, front and rear part in the conveyor frame 21 of conveyor 2 is provided with the portion of hanging tag 73,74, the rear side of the anterior portion that hangs tag 73 fore holding sections 71 hangs tag on gathering sill 64, and the front side of the portion that the hangs tag 74 fore holding sections 72 at rear portion hangs tag on gathering sill 65.Therefore, as X ray shielding slide 61, along with holding section 71,72 hung tag portion 73,74 respectively forwards with the rear pushing and by on push away, remain on the open position that peristome 11 is opened wide.

When from this state following shown in double dot dash line Fig. 8 (B) with conveyor 2 warpages, the limit with the said portion 73,74 that hangs tag when the vertical component of gathering sill 64,65 is extracted out upward, holding section 71,72 rearward reaches the place ahead respectively under the effect of the deadweight of X ray shielding slide 61 and rod member 67,68 move in, X ray shielding slide 61 drops to detent position, with peristome 11 sealings.

According to this formation, conveyor 2 pulled down from device body 1 and peristome 11 when opening wide, the X ray shielding slide 61 that produces mechanical interlock along with this dismounting is with peristome 11 sealings, therefore, even the action that mistake is connected x-ray source 3, also can prevent the reflected ray of the X ray that x-ray source 3 is launched and diffusion ray from peristome 11 to external leaks.And, as X ray shielding slide 61, be not to from the X ray of x-ray source 3 but the faint X ray of device internal reflection is shielded, thus make thin and simply structure get final product.

In above-mentioned the 3rd form of implementation, make X ray shielding slide 61 carry out closing motion mutually linkedly with the dismounting of conveyor 2, but also can be therewith differently, make shielding curtain 18 dismountings that X ray shielding slide covers along with the top with the conveyor 2 at peristome 11 places and carry out closing motion linkedly.Under this occasion, will be arranged near the peristome 11 with the same X ray of Fig. 8 shielding slide 61.And, the gathering sill same with the gathering sill 64,65 of Fig. 8 is set above peristome 11, to plug together mouth is configured in said gathering sill towards the inner posture of device along fore-and-aft direction FR depth portion with it to shielding curtain 18 same unlimited detecting devices 40 that support and shown in Figure 6, on this unlimited detecting device 40, the male and female switch 41,42 that is arranged on the curtain framework 19 that shielding curtain 18 is supported is made it and can install at fore-and-aft direction FR with plugging together.And then, on shielding curtain 18, link an end having with the same rod member 67,68 of Fig. 8, the holding section 71,72 of its another end engages with said gathering sill, with the form that holding section 71,72 is clipped in the middle the portion that hangs tag that is located on the curtain framework 19 73,74 is engaged with gathering sill, male and female switch 41,42 is installed in opens wide on the detecting device 40 in this state.According to this formation, when shielding curtain 18 when peristome 11 is pulled down, X ray shielding slide 61 descends by deadweight and peristome 11 is sealed, therefore, even will shield the action that mistake is connected x-ray source 3 under the situation that curtain 18 pulls down, also can prevent X ray from peristome 11 to external leaks.

In the aforementioned the 1st and the 2nd form of implementation, be to open wide the top that detecting device 4 is arranged on conveyor 2, but also can be as shown in Figure 9, the photocell pickoff 45 that optical axis is set in the reflection-type on the fore-and-aft direction FR is a plurality of along the leg-of-mutton limit configuration of x-ray bombardment scope A.Wherein, the most the next sensor 45 is configured in the place ahead of conveyor 2 or rear and becomes and predicts the unlimited detecting device 4 whether conveyor 2 exists.Other sensor 45 can detect the omission article M that at least a portion is passed through from the outside of x-ray bombardment scope A reliably.

In addition, also can be as shown in figure 10, as unlimited detecting device 4, with the both sides of reflection type optical fulgurite sensor configuration in the vertex of a triangle of x-ray bombardment scope A, the reflecting plate 47 that will reflect towards photocell pickoff 4 from the detection light of photocell pickoff 4 is configured in the both sides on leg-of-mutton base, makes that detecting light advances along leg-of-mutton limit.According to this formation, also can whether exist and omission article M detects reliably conveyor 2.

In addition, the display 16 of Fig. 1 is touching-type monitors, but this display 16 is only shown, and operating key is provided with in addition.In addition, also can on display 16, show the fluoroscopy images of the X ray that reason display 17 shows, and omit display 17.

In above form of implementation, be illustrated with regard to the occasion that a conveyor 2 is set in the device body 1, but the present invention also is applicable to the occasion that two conveyors are set at the inside of device body 1 one-tenth one row.

Claims (9)

1. X ray foreign body detecting device that the X ray that utilizes the x-ray source emission when article are carried with conveyor is checked the foreign matter in the article, it is characterized in that, possess: can open wide and X ray externally is in the unlimited detecting device that the state of non-shielding detects the part of said device
And, the irradiation shut-down mechanism that makes the X ray from said x-ray source stop to shine according to the detection that said X ray non-shielding state is carried out.
2. X ray foreign body detecting device as claimed in claim 1 is characterized in that, the power switch that can make it to disconnect by said irradiation shut-down mechanism is installed between said x-ray source and its power supply.
3. X ray foreign body detecting device that the X ray that utilizes the x-ray source emission when article are carried with conveyor is checked the foreign matter in the article, it is characterized in that, possess: have the front and back of the throughput direction that is arranged on the conveyor delivery article and can make the device body of the 1st and the 2nd peristome that two ends of the conveyor that freely carries out dismounting stretch out, detect and predict the unlimited detecting device that is in the unlimited state of said peristome when said conveyor is pulled down state, and according to predicting of said opening-wide state shielded slide with the X ray that said peristome seals.
4. as the described X ray foreign body detecting device of one of claim 1 to 3, it is characterized in that said unlimited detecting device is to detect the non-existent status detection device of said conveyor.
5. X ray foreign body detecting device as claimed in claim 4, it is characterized in that, said unlimited detecting device, be to be in the detecting device that the omission article outside the x-ray bombardment scope on the Width detect on the said conveying machine side at least a portion, and, be provided with the alarm mechanism of reporting to the police based on predicting said omission article.
6. as the described X ray foreign body detecting device of one of claim 1 to 5, it is characterized in that said unlimited detecting device is the detecting device that detects of the agreement change when changing working routine still.
7. X ray foreign body detecting device that the X ray that utilizes the x-ray source emission when article are carried with conveyor is checked the foreign matter in the article, it is characterized in that, possess: have the front and back of the throughput direction that is arranged on the conveyor delivery article and can make the device body of the 1st and the 2nd peristome that two ends of the conveyor that freely carries out dismounting stretch out, and along with the dismounting of said conveyor produces mechanical interlock and with the X ray shielding slide of said peristome sealing.
8. as the described X ray foreign body detecting device of one of claim 1 to 7, it is characterized in that, be provided with in the front and back of the throughput direction of said conveyor or said x-ray bombardment position thereunder and prevent the X ray shield member that leaks of direction forwards, backwards.
9. as the described X ray foreign body detecting device of one of claim 1 to 8, it is characterized in that, below said conveyor, be provided with the water receiving parts that are inclined relative to horizontal, above the freeing port of the outside draining on the said water receiving parts, the barricade of the inclination that this freeing port is shielded with respect to X ray is set.
CNB011325526A 2000-09-04 2001-09-03 Foreign body testing device using x-ray CN1193223C (en)

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JP266525/00 2000-09-04
JP2000266525A JP2002071588A (en) 2000-09-04 2000-09-04 X-ray foreign-matter inspection device
JP266525/2000 2000-09-04

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CN103064126B (en) * 2012-11-06 2017-05-17 惠安盛泽建材有限公司 Security check device with rotating shielded gate

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GB2370634A (en) 2002-07-03

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