JP2003107015A - X-ray foreign matter detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change an apparatus length in conformity with a line arrangement or the like and to stably deliver objects to be inspected between a front and a rear stage devices. SOLUTION: A front end 3a and a rear end 3b of a transfer 3 are made to freely project forward and rearward of a transfer direction with respect to a housing 5 respectively. A front part slide supporting part 11 is set to the side of the front end 3a, and a rear part slide supporting part 12 is set to the side of the rear end 3b. These are constituted of fixing parts 11a, 12a fixed to a storage unit 6 for the housing 5 and slides 11b, 12b slidable along the transfer direction on the fixing parts 11a, 12a respectively. End parts 8a and 8d can be projected from the housing 5 by sliding the slides 11b and 12b, so that the front end 3a of the transfer 3 can be arranged to be superposed by a rear end 60b of the front stage device 60, and the rear end 3b can be arranged to superpose over a front end 61a of the rear stage device 61. Delivering the viscous objects to be inspected can be stabilized accordingly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray foreign matter detecting apparatus for detecting foreign matter inside while transporting an object to be inspected, and more particularly to an X-ray foreign matter detecting apparatus whose transport length is easily variable.

[0002]

2. Description of the Related Art FIG. 6 is a front view showing a conventional X-ray foreign matter detecting apparatus. The X-ray foreign matter detection device 50 has a conveyor 51 that conveys an object to be inspected at the center, irradiates the object to be inspected with X-rays from the X-ray generation unit 52, and X-rays that have passed through the object to be inspected are X-rays. The detection unit 53 detects foreign matter in the inspection object. The X-ray foreign matter detection apparatus 50 is provided with a cover 55 formed of an X-ray shielding metal material that covers the entire length of the conveyor 51 so that the X-rays emitted from the X-ray generation unit 52 do not leak to the outside. Has been.

The X-ray foreign matter detection device 50 may be used in place of the conventionally used metal foreign matter detection device, and by using X-rays, in addition to the metal in the inspection object such as food. Various foreign substances (bone, wood, synthetic resin, etc.) can be detected. For example, the foreign matter detection device is
For example, a packaging machine is provided in the upstream device and a sorting machine is provided in the downstream device, and the device 50 is arranged at an intermediate position, and the machine length (conveyor 51 transport length) of the predetermined length that connects the upstream and downstream devices is used. .

[0004]

The above-mentioned line is used when the arrangement position of the front and rear devices is changed, when the X-ray foreign matter detecting device 50 is arranged in place of the metal foreign matter detecting device as described above, or in other models. When replacing with the X-ray foreign matter detection device 50,
It is necessary to adapt the captain of the newly arranged X-ray foreign matter detection device 50 to the space between the pre-stage device and the post-stage device.

However, the conventional X-ray foreign matter detection device 5
No. 0 could not be easily installed because the machine length (conveyance length of the conveyor 51) was fixed. For example, when the length of the new device 50 is short, the object to be inspected cannot be delivered between the former device and the latter device. On the other hand, if the length of the new device 50 is long, it cannot be installed between the pre-stage device and the post-stage device.

As described above, the conventional X-ray foreign matter detection device 5
The 0 could not easily change the captain. Accordingly, in order to obtain a device matching the required captain on the line, the entire device is replaced with the device 50 corresponding to the required captain, or the device 50 having a specially required captain is created. It took time. On the other hand, when the front and rear devices of the X-ray foreign matter detection device 50 are replaced or the arrangement position is changed, similarly, the captain of the installed device 50 cannot be easily changed.

Further, in the conventional X-ray foreign matter detecting device 50, the front end and the rear end of the conveyor 51 are located inside the housing of the device 50, and the inspection object is stably delivered between the front and rear devices. In some cases, it could not be done. For example, when the object to be inspected has adhesiveness, it is difficult to perform the delivery from the pre-stage device 60 at the same height, so that a predetermined head is provided and the rear end 60b of the pre-stage device 60 is connected to the conveyor 51. It is necessary to overlap the front end 51a. However, as shown in the figure, the end portion 60a of the pre-stage device 60 cannot be inserted into the housing even if they are arranged in an overlapping manner.
It was not possible to deliver with a drop, and the gap was large so that delivery could not be performed stably.

In addition, even when the roller diameter of the rear stage device 61 is large, the gap between the rear end 51b of the conveyor 51 and the roller is large. Also in this case, a predetermined head is provided for delivery to the rear device 61, and the front end 61a of the rear device 61 is
Although it is necessary to arrange it on the rear end 51b of the conveyor 51, this cannot be done for the same reason as above.

The present invention has been made in order to solve the above-mentioned problems, and the machine length can be easily changed according to the line arrangement and the like, and the object to be inspected is connected between the front and rear devices. It is an object of the present invention to provide an X-ray foreign matter detection device that can be delivered stably.

[0010]

In order to achieve the above object, an X-ray foreign matter detecting apparatus of the present invention irradiates an object to be inspected with X-rays while conveying the object to be inspected to remove foreign matter inside. In an X-ray foreign matter detection device for detecting, at least one of a front end for receiving the object to be inspected from a front-stage device and a rear end for delivering it to a rear-stage device is in a transport direction with respect to a casing of the device to be exposed to the X-rays. The present invention is characterized in that it is provided with a carrying section that is formed to project forward or backward.

Further, the transport section is provided with a slide support section which is slidable in the transport direction on a front side or a rear side of the transport section, and the slide support section is a roller for tensioning a transport belt. The interval may be varied by the slide, and the transport length may be variable.

Further, the slide supporting portion is fixed to a housing unit that houses the X-ray detecting portion fixed in the housing, and the slide supporting portion projects forward or backward in the transport direction with respect to the stationary portion. Slide freely to
The roller can be configured by a slide portion that rotatably supports the roller at an end portion.

Further, the fixed portion of the slide support portion may be detachably attached to the accommodating unit of the X-ray detection portion fixed in the housing.

Further, the slide portion of the slide support portion is provided with a support means for rotatably supporting a pair of rollers up and down corresponding to the height of the accommodating unit. It may be formed so as to project from the lower side to the end side.

According to the above construction, the housing unit for housing the X-ray detection unit is provided in the housing, and the slide supporting unit for pivotally supporting the roller is detachably attached to the housing unit. While being conveyed, the conveyor belt wound around each roller causes the X-ray detection unit to inspect the object to be inspected. When the machine length is changed, the slide portion of the slide support portion is slid in accordance with the desired transport length and is projected from the housing in the transport direction (or the opposite direction).

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing an example of the X-ray foreign matter detection device of the present invention, and FIG. 2 is a front view thereof.
The X-ray foreign matter detection device mainly includes an X-ray generation unit 1 that generates X-rays and an X-ray detection unit 2 that receives X-rays from the X-ray generation unit 1.
And a transport unit 3 that transports an inspection object (not shown) between the X-ray generation unit 1 and the X-ray detection unit 2.

The X-ray generator 1 is an X-ray tube 4 for generating X-rays.
It is configured to prevent the leakage of X-rays by covering the surroundings with a shielding plate. The shielding plate is formed by internally shielding a shielding material such as lead. The X-ray generation unit 1 is arranged on an upper part of a casing 5 which is a main body of the X-ray foreign matter detection device, and radiates X-rays downward. The X-rays are radiated from the X-ray tube 4 in a substantially conical shape that spreads downward, and then the elongated hole formed in the bottom of the X-ray generation unit 1 and the side of the casing 5 supporting the X-ray generation unit 1 are exposed. As shown by the alternate long and short dash line in FIG. 1, irradiation is performed through a long hole provided on the bottom plate in the form of a plane that spreads downward.

The X-ray detection unit 2 is arranged at the lower part of the casing 5 which is the main body of the X-ray foreign matter detection device, and is configured to receive the X-rays emitted from the X-ray generation unit 1. This X
The line detector 2 is housed in a housing unit 6 made of metal. The accommodating unit 6 has an upper surface 6a formed to be substantially flat.
Has a slit 7. The slit 7 is formed by attaching a resin material that transmits X-rays to the slit 6 formed in the upper surface 6a so as to extend in a direction orthogonal to the transport direction, the resin material being transparent to silicon and the like. The slits 7 pass the planar X-rays emitted from the X-ray generation unit 1. The X-rays that have passed through the slits 7 of the accommodation unit 6 are received by the X-ray detection unit 2 arranged in the accommodation unit 6. In the X-ray detection unit 2, this X
The rays are converted into light and output to an X-ray processing unit (not shown).

The accommodating unit 6 is fixed at one side surface (back side) in the width direction to the side of the casing 5 which is the main body of the X-ray foreign matter detecting apparatus. In the present embodiment, the accommodation unit 6 is fixed by welding. Other than welding, bolting or the like may be used.

The carrying section 3 has a predetermined carrying length and carries an object to be inspected. The object to be inspected is passed through the planar X-rays emitted from the X-ray generation unit 1 toward the X-ray detection unit 2 during the transportation. As shown in FIG. 1, the transport length of the transport unit 3 (machine length of the X-ray detection device) is longer than the width of the housing 5, and the transport unit 3 projects from the housing 5 in the front-back direction in the transport direction. The transport unit 3 mainly includes a roller 8, a motor unit 9, and
It consists of a conveyor belt 10.

The rollers 8 and the conveyor belt 10 constituting the conveyor 3 are attached to the accommodating unit 6 in which the X-ray detector 2 is arranged. As shown in FIG. 2, the front surface 6 of the accommodation unit 6 positioned before and after the transport unit 3 in the transport direction.
A front slide support 11 and a rear slide support 12 are provided on the b and the rear surface 6c.

The front slide support portion 11 includes a fixed portion 11a.
And a slide portion 11b slidable forward with respect to the fixed portion 11a in the transport direction. Similarly, for the rear slide support portion 12, the fixed portion 12a and the fixed portion 12a
Sliding part 12b that is slidable rearward in the transport direction with respect to
Have. These fixed parts 11a and 12a, slide part 1
1b and 12b are formed by bending a plate.

FIG. 3 is a perspective view showing the configuration of the rear slide support portion 12 portion. Hereinafter, the rear slide support portion 12
Will be described in detail with reference to FIG. The fixed portion 12a is provided with a plurality (five in total) of Dharma type holes 15 having a small diameter and a large diameter continuous on the surface 12aa facing the accommodation unit 6. On the other hand, the rear surface 6c of the accommodation unit 6 is provided with a locking portion 16 including a collar that engages with the small diameter of the dharma-shaped hole 15 of the fixing portion 12a and a bolt and washer that penetrates with the large diameter. .

That is, the fixing portion 12a is hooked on the rear surface 6c of the accommodating unit 6 by passing the dharma-shaped hole 15 through the bolt and washer of the locking portion 16 and engaging with the collar of the locking portion 16. As a result, the rear slide support portion 12 is detachably installed on the rear surface 6c of the accommodation unit 6.

As shown in FIG. 2, the front slide support portion 11 also has a dharma-shaped hole 15 and is attachable to and detachable from the front surface 6b of the metal plate 6.

The fixed portion 12a is composed of a surface 12aa contacting the accommodating unit 6, an upper surface 12ab, and side surfaces 12ac, 12ad, and has a predetermined length in the carrying direction. On the upper surface 12ab of the fixed portion 12a, a slide portion 12b having a predetermined length extending rearward in the transport direction is provided in an overlapping manner.

The slide portion 12b has an upper surface 12bb that overlaps the upper surface 12ab of the fixed portion 12a and side surfaces 12ac and 12c.
It has side surfaces 12bc and 12bd overlapping with ad. One or a plurality of screw insertion holes 13 are formed on the side surfaces 12bc and 12bd of the slide portion 12b along the slide direction, and a plurality of screw grooves 14 are formed on the fixed portion 12a side at the same pitch. Are formed. Screw insertion hole 1
3. By fixing the screw grooves 14 with each other with the screws 17, the slide position of the slide portion 12b can be variably fixed to the fixed portion 21a.

A total of four rollers 8 are provided in the transport section 3 (see FIG. 2). Of these, three rollers 8a, 8b, 8c form a driven roller, and the remaining one roller 8d forms a driving roller. Rollers 8a, 8b, 8c as driven rollers
Is rotatable about roller shafts 20 projecting at both ends via bearings (not shown) installed inside.

A roller 8d, which is provided on the rear slide support portion 12 and serves as a drive roller, has a rotary shaft 21 protruding at both ends.
Are rotatably supported by bearings 22 each having a bearing (not shown) therein. Each bearing 22
Are fixed to the fixed shaft 23 with screws. Further, one bearing portion 22 constitutes a tubular coupling portion 24 that exposes the end portion of the rotary shaft 21. One of the male and female couplings 25, which is connected to the output shaft side of a motor unit 9 described later, is fixed to the exposed end of the rotary shaft 21. The drive roller 8d, the bearing portion 22, the fixed shaft 23, the connecting portion 24, and the coupling 25 constitute an integrated drive roller unit 8U.

Of the rollers 8, the roller 8c (driven roller) and the roller 8d (driving roller) are rear rollers and are supported between the side surfaces 12bc and 12bd of the slide portion 12b. Notches 28 are formed at the lower edges of the side surfaces 12bc and 12bd. The roller 8c has a cutout 28
The roller shaft 20 is inserted through the side surface 12bc,
It is supported between 12 bd.

The roller 8c extends from the cutout 28 to the roller shaft 2
It can be easily removed by removing 0.
In this way, the roller 8c is detachable from the slide portion 12b.

A roller 8 is provided on the upper edge of the slide portion 12b.
A bearing portion 22 of d (driving roller) and a support portion 29 that supports the end portion of the fixed shaft 23 are formed. Further, the support member 12c has a fixed shaft 23 mounted in the support recess 29a.
A fixture 30 such as a catch clip for locking and fixing one end of the is provided. The roller 8 d positions and mounts one end of the fixed shaft 23 in the support recess 29 a, and the same end is fixed to the fixture 30 to support the support member 12.
It is supported between b and the support member 12c.

The roller 8d is a fixed shaft 2 formed by a fixture 30.
3 is unlocked and the end of the rotary shaft 21 is connected to the motor unit 9
It can be easily removed by removing it from the connection with the output shaft side. In this way, the roller 8d is detachable from the rear slide support portion 12.

Of the above rollers 8, the roller 8a
The (driven roller) and the roller 8b (driven roller) form a front roller and are supported by the front slide support portion 11.
The front slide support portion 11 has substantially the same structure as the rear slide support portion 12 and is on the driven side, and thus detailed description thereof will be omitted. Incidentally, the roller 8a and the roller 8b
By removing the roller shaft from the notch not shown,
Like the rollers 8c and 8d, it is detachable from the front slide support portion 11.

As described above, the rollers 8 (8a, 8a, 8a, 8b) supported by the front slide supporting portion 11 and the rear slide supporting portion 12 respectively.
8b, 8c, 8d) are supported so as to have a parallel relationship. The rollers 8a and 8b (front rollers) supported by the front slide support portion 11 are such that the upper roller 8a is located on the front side and the lower roller 8b is located on the rear side. Further, of the rollers 8c and 8d (rear rollers) supported by the rear slide support portion 12, the roller 8d on the upper side is located on the rear side, and the roller 8c on the lower side is located on the front side.

FIG. 4 is a perspective view showing a state where the rear slide support portion 12 is assembled and attached to the accommodation unit 6. The motor unit 9 is fixed to the slide plate 12b of the rear slide support portion 12. The motor unit 9 is composed of a drive motor and a speed reducer. On the output shaft side of the motor unit 9, a roller 8d forming a driving roller is provided.
A connecting portion 31 that connects the rotating shaft 21 and the output shaft to the coaxial position is provided by being connected to the connecting portion 24 (see FIG. 1). Further, the output shaft of the motor unit 9 has a roller 8d.
The other of the male and female couplings 25 that are connected to the end of the rotary shaft 21 is fixed.

By connecting the connecting portion 24 of the roller 8d and the connecting portion 31 of the motor unit 9, the rotary shaft 21 of the roller 8d and the output shaft of the motor unit 9 are coaxial with each other. The coupling 25 is connected. As a result, the rotation of the output shaft of the motor unit 9 is transmitted to the rotary shaft 21.

Further, the connection between the connecting portion 24 of the roller 8d and the connecting portion 31 of the motor unit 9 not only makes the rotary shaft 21 and the output shaft coaxial, but also positions the roller 8d. That is, in the roller 8d, one end of the fixed shaft 23 for fixing the bearing portion 22 is positioned and fixed on the support member 12c side of the rear slide support portion 12, and the connecting portion 24 and the motor unit 9 on opposite sides are connected. By being connected to the portion 31, it is positioned and supported between the side surfaces 12bc and 12bd.

The conveyor belt 10 is an endless belt,
The rollers 8a, 8 are formed in an endless shape along the transport direction.
It is wound around b, 8c and 8d. Conveyor belt 10
Is slid between the rollers 8a, 8b, 8c and 8d by sliding the front slide support portion 11.
A tension adjusting mechanism (not shown) is provided on the slide plate 11b that supports the roller 8b, and the tension of the stretched conveyor belt 10 can be adjusted.
The width of the conveyor belt 10 is substantially the same as or larger than the lateral length of the slit 7 of the accommodation unit 6.

Then, as shown in FIG. 1, the conveying section 3 starts from the middle position and is provided with a front cover 32, a rear cover 33, and a front cover 3.
It is covered by 4 to prevent leakage of X-rays. Openings 35 are formed in the front cover 32 and the rear cover 33. The carry-in / carry-out portions of the pre-stage device and the post-stage device are arranged close to the pair of openings 35, respectively. For example, the former device is provided with a packaging machine for accommodating an object to be inspected in a tray or the like, and the latter device is provided with a sorter for selecting acceptability according to an X-ray inspection result. The pre-stage device delivers the inspection object from the opening 35 of the front cover 32 to the conveyor belt 10, conveys the inside of the device, and delivers it to the post-stage device from the opening 35 portion of the rear cover 33.

The front cover 34 is provided on the front side of the housing 5 and covers the front side of the transport section 3. This front cover 34 is
Both side portions are formed into a substantially trapezoidal shape that conforms to the shapes of the front cover 32 and the rear cover 33, and are pivotally supported by a hinge 36 provided in the lower portion so as to be openable to the front side.

The housing 5 is opened by opening the front cover 34.
The transfer section 3 provided inside is a fixed side to the housing 5 1
Except for the surfaces, the top, bottom, front, back, front, and front can be exposed for a total of five surfaces, and maintenance and cleaning can be easily performed.
The front cover 32, the rear cover 33, and the front cover 34 can prevent leakage of internal X-rays.
Although not shown, X-ray shielding members are provided at a plurality of positions in the conveyance direction of the conveyance belt 10 to prevent leakage of X-rays from the opening 35 to the outside. This X
The line shielding member is made of, for example, rubber containing lead, and is configured to be suspended above the conveyor belt 10.

In the transport unit 3 having the above-described structure, the roller 8d is rotated by the driving of the motor unit 9, and each roller 8a,
The conveyor belt 10 stretched between 8b, 8c, and 8d is circulated in a predetermined direction (forward or reverse). Circulation of the transport belt 10 is in the vertical direction (front-back direction) orthogonal to the slit 7 of the accommodation unit 6 that receives the X-rays that are planarly emitted from the X-ray generation unit 1. In addition, the conveyor belt 10 includes the accommodation unit 6
It circulates along the upper surface 6a, the front slide support portion 11, and the rear slide support portion 12. As a result, the inspection object sent onto the conveyor belt 10 passes between the planar X-rays extending from the X-ray generator 1 to the X-ray detector 2.

As described above, the structure of the transport unit 3 is integrated with the storage unit 6 that stores the X-ray detection unit 2 that detects X-rays. Then, the integrated X-ray detection unit 2
The transport unit 3 transports the object to be inspected and constitutes an X-ray detection unit that detects X-rays transmitted through the object to be inspected.

In the X-ray foreign matter detecting apparatus constructed as described above, the X-ray detecting unit 2 is housed in the housing unit 6, and the transport unit 3 is detachably attached to the housing unit 6. As a result, the X-ray detection unit 2 and the transport unit 3 which are in close proximity to each other for detecting foreign matter contained in the transported inspection object are detachably assembled through the housing unit 6, so that they are independently assembled. Maintenance such as inspection, repair, and cleaning of each part can be facilitated.

The accommodating unit 6 has a waterproof structure over the entire circumference, and detects the X-rays passing through the slit 7 from the X-ray detecting section 2
Since it is configured so as to receive the water, it is possible to shield the moisture and the like leaked from the inspected object being conveyed from the X-ray detection unit 2 and wash the dirt.

Next, the change of the captain of the X-ray foreign matter detecting device will be described. The machine length of the apparatus is determined by the transport length of the transport unit 3, but the transport unit 3 having the unit configuration as described above can easily change the transport length. On this occasion,
The accommodating unit 6 of the transport unit 3 and the X accommodated inside
The line detector 2 may remain fixed to the housing 5.

Specifically, the slide portions 11b and 1b of the front slide support portion 11 and the rear slide support portion 12, respectively.
It can be done by sliding 2b. Rear slide support 12
The side will be described as an example.
Slide 2b to the position where the desired captain is reached.

With the slide portion 12b slid, the screw insertion hole 13 of the slide portion 12b and the fixing portion 12
The screw grooves 14 of a are positioned with respect to each other, and fixed with screws 17. As a result, the slide portion 12b is fixed to the fixed portion 12a. Since the plurality of screw grooves 14 are formed at a predetermined pitch, the slide portion 12b can change the machine length at this pitch interval. Similarly, with respect to the front slide support portion 11, the machine length can be changed by sliding the slide portion 11b.

At this time, the driven roller 8 attached to the front slide support portion 11 and the rear slide support portion 12 is attached.
The machine length can be changed without changing the a, 8b, 8c and the drive roller unit 8U.

To remove the driven rollers 8a, 8b and 8c, the front cover 34 is opened, the screw 17 of the front slide support portion 11 is removed, and the slide portion 12b is slid in the direction in which the machine length is shortened. Can be loosened and the conveyor belt 10 can be removed. Also, the drive roller unit 8U can be detached only by releasing the fixing tool 30, and at the same time, the coupling with the motor unit 9 can be detached by the coupling 25 of the coupling portion 24.

To remove the front slide supporting portion 11 and the rear slide supporting portion 12 from the accommodating unit 6, the fixing portions 11a and 12a are lifted up and the Dharma type hole 15 is removed.
This can be easily done by simply disengaging the engaging portion 16 (bolts and washers) on the metal plate 6 side.

As described above, the machine length can be changed without attaching / detaching the accommodating unit 6 accommodating the X-ray detecting unit 2, that is, the main part of the X-ray detecting unit. Along with this, since the position of the X-ray detection unit 2 is not changed, the relative position with respect to the X-ray generation unit 1 does not change, and adjustment of the irradiation position or the like can be unnecessary. Further, the captain can be changed while the installation position of the housing 5 is fixed, and even when the arrangement interval between the front stage and the rear stage device side is changed, the captain can be changed by the above-mentioned simple procedure. The object to be inspected can be stably delivered to and from the subsequent device. The captain is changed, for example, when the X-ray foreign matter detection device is installed in an existing production line so as to match the empty space at the installation location.

FIG. 5 is a front view for explaining another example of changing the captain. As described above, in the transport unit 3, the roller 8a at the front end and the roller 8d at the rear end can project forward and backward in the transport direction with respect to the housing 5, and the length in the transport direction can be changed. It is located in. Therefore, for example, when the object to be inspected has adhesiveness, it is necessary to provide a predetermined drop in delivery from the pre-stage device 60. At this time, the rear end 60b of the front-stage device 60 can be arranged so as to overlap with the upper position of the front end 3a of the transport unit 3, and stable delivery can be performed.

When the roller diameter of the rear stage device 61 is large, the roller 8d at the rear end 3b of the conveying section 3 and the rear stage device 61 are used.
Since the gap between the front end 61a and the front end 61a becomes large, in this case as well, a predetermined drop is provided for delivery to the rear device 61.
At this time, the front end 61a of the rear device 61 is connected to the rear end 3 of the transport unit 3.
It can be placed over the lower position of b, and stable delivery can be performed.

Not limited to the above description, when the object to be inspected has an adhesive property, it can be provided in the vicinity of the rear end 3b of the conveying section 3 regardless of the roller diameter of the rear device 61. Even when the roller diameter of the pre-stage device 60 is large, the front end 3 of the transport unit 3 is
They can be arranged in a lower position of a so as to overlap each other, and both of them can stably receive the object to be inspected.

At the front end 3a of the transport unit 3, the upper roller 8a projects forward with respect to the lower roller 8b in the transport direction, and at the rear end 3b, the upper roller 8d faces the lower roller 8c. It projects rearward in the transport direction. The conveyor belt 10 in this portion is inclined. As a result, the roller diameters at the front end 3a and the rear end 3b of the transport unit 3 can be reduced, and the front-stage device 60 and the rear-stage device 6 can be correspondingly reduced.
It is possible to reduce the distance from 1 and stabilize the delivery. In addition, the rear end 60b of the pre-stage device 60 can be arranged as close as possible to the lower part of the front end 3a of the transport unit 3, superimposition is possible, and the gap can be minimized. Similarly, the front end 61a of the post-stage device 61 can be superposed on the lower part of the rear end 3b of the transport unit 3 and can be arranged as close as possible.

In the above-described embodiment, the configuration in which the machine length can be changed by the pitch of the screw insertion hole 13 and the screw groove 14 has been described, but the present invention is not limited to this. Front slide support 11
And the fixed portions 11a, 12a of the rear slide support portion 12,
Alternatively, if a long groove extending in the sliding direction is formed instead of the screw groove in either of the slide portions 11b and 12b, the sliding amount can be continuously changed within the range of the long groove, and the machine length can be finely changed correspondingly. Become.

Further, the carrier unit 3 can change the captain according to the arrangement of the pre-stage device 60 and the post-stage device 61 and the configuration of delivery, so that, for example, the pre-stage device 60 has a normal configuration and the feeding unit 3 is provided. If it is the same as the transport surface of the front side, the front slide support portion 11 slides zero and the front end 3a (roller 8a) is housed inside the housing 5 (front cover 32).
It is also possible to detect lines. Similarly, the rear end 3b of the transport unit 3 can be housed inside the housing 5.

[0060]

According to the present invention, the roller at the front end or the rear end is projected from the housing, and when the object to be inspected has adhesiveness, or the roller at the conveyor end of the pre-stage device or the post-stage device. When the diameter is large, the end of the device of the present invention can be vertically arranged so that the end of the pre-stage device or the post-stage device can be shifted in the vertical direction so that the inspection object can be smoothly delivered. Become.

Further, the slide support portion can be slid so that the roller interval can be varied to easily change the machine length. This allows the captain to be changed without replacing the entire device. Further, in the case of exchanging the old device installed between the front-stage device and the rear-stage device of the line, the length required for the new device can be easily obtained. The slide support portion can be easily configured such that the slide portion can slide forward or backward in the transport direction with respect to the fixed portion. Further, the fixing portion is configured to be attachable to and detachable from the housing-side accommodation unit, so that the cleaning performance and the exchangeability can be improved.

Further, by providing a pair of rollers above and below the end of the slide portion and disposing the upper roller so as to project toward the end more than the lower roller, the roller diameter of the transfer portion can be made smaller, and the front stage device and the rear stage device can be made smaller. The gap between the device and the device can be reduced, and the object to be inspected can be delivered stably. Further, the front end of the rear stage device can be partially overlapped with the lower part of the rear end of the conveying section, and the transfer can be stably performed even if the roller diameter of the rear stage device is large.

[Brief description of drawings]

FIG. 1 is a perspective view showing an X-ray foreign matter detection device of the present invention.

FIG. 2 is a front view showing the X-ray foreign matter detection device.

FIG. 3 is an exploded perspective view showing a rear slide support portion.

FIG. 4 is a perspective view after assembly showing a rear slide support portion.

FIG. 5 is a diagram showing a layout configuration of a former device and a latter device.

FIG. 6 is a diagram showing a conventional X-ray foreign matter detection device.

[Explanation of symbols]

1 ... X-ray generation part, 2 ... X-ray detection part, 3 ... Transport part, 3a ...
Front end, 3b ... Rear end, 6 ... Housing unit, 8a-8d ... Roller, 10 ... Conveyor belt, 11 ... Front slide support part,
12 ... Rear slide support part, 11a, 12a ... Fixed part,
11b, 12b ... slide part, 13 ... screw insertion hole, 14
... screw groove, 32 ... front cover, 33 ... rear cover, 34 ... front cover, 60 ... front device, 60a ... rear end, 61 ... rear device, 61a ... front end.

Claims (5)

[Claims] 1. An X-ray foreign matter detection device for detecting foreign matter inside by irradiating X-rays to the object to be inspected while transporting the object to be inspected, a front end for receiving the object to be inspected from a preceding-stage device, and An X-ray, characterized in that at least one of the rear ends to be transferred to the latter-stage device is provided with a carrying section formed so as to project forward or backward in the carrying direction with respect to the housing of the device to which the X-ray is irradiated. Foreign object detection device. 2. The transport section is provided with a slide support section that is slidable in the transport direction on the side of the front or rear that is formed to project, and the slide support section is a roller for tensioning a transport belt. The X-ray foreign matter detection device according to claim 1, wherein the slide length is variable by changing the interval by the slide. 3. The slide support portion includes a fixing portion fixed to an accommodation unit that accommodates an X-ray detecting portion fixed in the housing, and a front portion or a rear portion in the transport direction with respect to the fixing portion. 3. The X-ray foreign matter detection device according to claim 2, further comprising a slide portion that is slidable so as to rotatably support the roller at an end portion thereof. 4. The X-ray foreign matter detection device according to claim 3, wherein the fixed portion of the slide support portion is configured to be attachable / detachable to / from the housing unit of the X-ray detection portion fixed in the housing. 5. The slide portion of the slide support portion includes support means for rotatably supporting a pair of rollers vertically corresponding to the height of the accommodating unit, and the pair of support means has an upper side. The X-ray foreign matter detection device according to claim 3, wherein the X-ray foreign matter detection device is formed so as to project from the lower side toward the end side.