JP3526263B2 - X-ray foreign matter inspection device - Google Patents

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 inspection apparatus capable of irradiating an article conveyed by a conveyer with X-rays to detect not only metallic foreign matter contained in the article but also non-metallic foreign matter. is there.

[0002]

2. Description of the Related Art Conventionally, in this type of inspection apparatus, only the conveyor belt of the conveyor has been detached for cleaning, but this alone is insufficient for cleaning. In other words, when carrying out foreign material inspections while carrying articles, dirt may adhere to rollers, frames, etc. that suspend the belts in addition to the carrying belts. It is preferable to perform the entire cleaning operation. Therefore, an inspection apparatus has been proposed in which two transfer conveyors are arranged in series in the apparatus main body and are detachably attached so that the entire conveyors can be taken in and out in the left-right direction orthogonal to the transfer direction (special feature). Kaihei 9-250992).

[0003]

When two conveyors are used as described above, since the lengths of these conveyors are short, they can be easily taken in and out of the apparatus main body, but a gap is generated between the conveyors. Therefore, dust and the like are likely to be accumulated in this gap, and the internal structure of the apparatus body is complicated. For this reason, it is preferable that one transport conveyor be used and the whole of the transport conveyor can be put in and taken out from the apparatus main body. However, when one transport conveyor is used, it is necessary to set the length of the transport conveyor longer than the length of the apparatus main body in the transport direction in order to interlock with the front and rear transport lines. In addition, in order to be able to put in and take out the transfer conveyor, an opening is provided in the front and rear walls of the main body of the apparatus in the transfer direction so that both the front and rear sides of the transfer conveyor are partially projected, and the opening is continuous with the opening and is orthogonal to the transfer direction. It is necessary to form an outlet for taking out the conveyor in the left-right direction on one side of the left and right side walls. Therefore, the device body has a cantilever structure in which the opening is supported only on the other side in the left-right direction, and the strength is reduced.

Although the object of the present invention is to use a conveyor which is longer than the length of the apparatus main body in the conveying direction, the opening of the apparatus main body through which the conveyor conveys is supported on both sides to increase the strength of the conveyor. An object of the present invention is to provide an X-ray foreign matter inspection device that can be easily put in and taken out of the main body of the device.

[0005]

In order to achieve the above object, an X-ray foreign matter inspection apparatus according to the invention of claim 1 carries out an X-ray foreign matter inspection in an article while conveying the article by a conveyor. The transport conveyor is an inspection device that can be attached to and detached from the device body, and the transport conveyor is set such that its length is longer than the length of the device body in the transport direction, and one end of the frame of the transport conveyor is used. The part is set to be bendable around a bending fulcrum shaft extending in the left-right direction orthogonal to the transport direction with respect to the other part of the frame.

When the whole of the conveyor is to be taken out during cleaning of the conveyor, one end of the frame is bent with respect to the other part of the frame around the bending fulcrum shaft,
Make the entire length of the transfer conveyor shorter than the length of the device body in the transfer direction. Since the length of the transfer conveyor is shortened in this way, the entire transfer conveyor can be easily taken out from the outlet provided on one side of the left and right side walls of the apparatus main body that is orthogonal to the transfer direction of the transfer conveyor. Further, similarly, it is possible to easily mount the transfer conveyor in the apparatus main body in a bent state. Further, since it is not necessary to open one side of the opening through which the conveyer conveys in the main body of the apparatus in order to enable the takeout to the side of the conveyer, it is possible to increase the strength of the opening by supporting it on both sides. it can.

[0007]

[0008]

In a preferred embodiment of the present invention, a first engaging portion is provided on the frame of the conveyer, and the first engaging portion is engaged with the apparatus main body in a direction parallel to the conveying direction, The 1st receiving part which regulates displacement of the 1st engaging part in the up-and-down direction is provided.

According to this structure, the operation of attaching / detaching the conveyor to / from the apparatus main body can be easily performed via the first engaging portion and the first receiving portion. Further, when the transfer conveyor is set, by engaging the engaging portion with the receiving portion, the transfer conveyor travels without vertical displacement. As a result, when an article on the transport conveyor is irradiated with X-rays from above and the X-ray receiving unit below the transport conveyor receives the X-rays, and the foreign matter is inspected by image processing of the foreign matter, the article transported by the transport conveyor. Since the vertical displacement of the object is suppressed, the accuracy of detecting the foreign matter by the image processing is improved.

Further, in a preferred embodiment, a second engaging portion is further provided on the frame of the conveyor, and the second engaging portion is engaged with the apparatus main body from above the conveying surface, The 2nd receiving part which regulates the displacement of this 2nd engaging part in the direction of order is provided.

According to this structure, the conveyor is attached to the main body of the apparatus through the first and second engaging portions and the first and second receiving portions without any displacement in the vertical and front-back directions. Since the vehicle travels, X-ray inspection of the article is more stable and accurate. Also, when taking out the conveyor, for example,
The first engaging portion is disengaged from the first receiving portion by bending the transport conveyor around the bending fulcrum shaft, and then the second engaging portion is released.
The engaging portion is lifted and disengaged from the second receiving portion. In this way, the engagement of the conveyor with the apparatus main body is released, and the entire length thereof is made shorter than the length of the apparatus main body in the conveying direction, so that the apparatus can be easily taken out from the outlet provided in the apparatus main body. Further, in the same manner, the transfer conveyor can be easily installed in the main body of the apparatus.

In another preferred embodiment, in addition to the first engaging portion and the first receiving portion, a third engaging portion is provided on the frame of the conveyor, and the apparatus main body is provided with the third engaging portion. A third receiving portion is provided, which is engaged with the mating portion in a direction parallel to the transport direction and opposite to the first engaging portion to regulate the displacement of the third engaging portion in the vertical direction.

According to this structure, the vertical displacement of the conveyor is restricted at the two locations of the first and third engaging portions and the first and third receiving portions, so that the accuracy of X-ray inspection of conveyed articles is further improved. improves. Further, the transfer conveyor can be easily put in and taken out of the apparatus main body. For example, at the time of taking out the conveyor, by shortening the conveyor, the first and third engaging portions are pulled out from the first and third receiving portions in directions opposite to each other to disengage them. , Can be easily taken out from, for example, an outlet provided on the side surface of the apparatus main body. Further, in the same manner, the transfer conveyor can be easily installed in the main body of the apparatus.

According to the X-ray foreign matter inspection apparatus of the fifth aspect of the present invention, the foreign matter in the article is inspected by X-ray while the article is being conveyed by the conveyer, and the conveyer is detachable from the main body of the apparatus. In the inspection device, the transport conveyor, the length of which is set longer than the length in the transport direction of the device body, the frame of the transport conveyor is provided with a first engaging portion, the device body, A first receiving portion is provided, which is engaged with the first engaging portion in a direction parallel to the transport direction, and regulates the displacement of the first engaging portion in the vertical direction.
A second engaging portion is provided on the frame of the conveyor,
The apparatus main body is provided with a second receiving portion that engages the second engaging portion from above the transport surface and restricts the displacement of the second engaging portion in the front-rear direction.

According to this X-ray foreign matter inspection apparatus, the conveyer conveyor is displaced in the vertical and front-back directions with respect to the apparatus main body through the first and second engaging portions and the first and second receiving portions. It is installed without running and runs. Therefore, in particular, since the vertical displacement of the article is suppressed, the article on the conveyor is irradiated with X-rays from above and the X-ray receiving unit below the conveyor receives the X-rays, and the foreign matter is subjected to image processing of the foreign matter. In the case of inspection, the vertical displacement of the article conveyed by the conveyor is suppressed, so that the accuracy of detecting foreign matter by image processing is improved. Further, even if the transfer conveyor is not bendable, the transfer conveyor can be easily taken in and out of the apparatus main body. For example, when taking out the conveyor,
By rotating one end of the transport conveyor upward to disengage the second engaging portion from the second receiving portion, and by horizontally moving the transport conveyor to disengage the first engaging portion from the first receiving portion. The engagement of the transfer conveyor can be easily released. After releasing the engagement of the transfer conveyor in this way, from the opening provided in the front and rear of the device main body in order to protrude a part of the transfer conveyor to the outside, while greatly projecting one end of the transfer conveyor of the device main body , For example, from the outlet provided on the side,
By pulling outward with the other end at the beginning or pulling out the transport conveyor from one of the front and rear openings, the transport conveyor can be easily taken out without hitting the front and rear transport lines. Further, similarly, the setting of the transfer conveyor in the apparatus main body can be easily performed.

In a preferred embodiment of the present invention,
An X-ray generation unit that irradiates the X-rays from above the transport conveyor, and an X-ray reception unit that receives the X-rays that are emitted from the X-ray generation unit and have passed through the X-ray passing unit, below the transport conveyor. An X-ray shielding member that extends in the left-right direction and shields X-rays is provided in front of and behind the X-ray passing portion of the conveyor. According to this configuration, the X-rays emitted from the X-ray generation unit are received by the X cotton receiving unit via the passing unit, and the foreign matter is inspected in the article conveyed by the conveyer conveyor by the X-rays. At this time, the X-rays and their scattered rays from the X-ray generation unit to the X-ray reception unit are prevented from leaking to the outside from the front-back direction of the X-ray passage unit by the X-ray shielding member, so that the shielding effect is enhanced. .

Further, it is preferable that the apparatus main body is provided with apparatus frames which are erected on the left and right in the carrying direction of the carrying conveyor. According to this structure, the opening portion of the apparatus main body that projects the transport conveyor back and forth has a double-sided support structure by the apparatus frame, and the strength of the apparatus main body increases.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an outline of the entire structure of an X-ray foreign matter inspection apparatus according to the present invention. This inspection apparatus includes one bendable conveyor 2 arranged in the middle of the apparatus main body 1 in the vertical direction, an X-ray generator 3 arranged above the conveyor 2 in the apparatus main body 1, and The X-ray receiving unit 20 is provided below the transport conveyor 2 to receive the X-rays that have been irradiated and have passed through the X-ray passing unit 2a of the transport conveyor 2. The X-rays from the X-ray generating unit 3 are received by the X-ray receiving unit 20 via the X-ray passing unit 3a, and foreign matter in the article M conveyed by the conveyor 2 is inspected by the X-rays. The conveyor 2 conveys the article M to the front F, is set to be longer than the length of the apparatus main body 1 in the front-rear direction FR, and has both ends thereof from the openings 11 formed on both front and rear sides of the apparatus main body 1. It is detachably attached to the inside of the apparatus main body 1 in a state of partially protruding outward. Further, an outlet 12 for taking out the entire conveyor 2 to the outside is formed on one side of the apparatus body 1 in the left-right direction, and an X-ray shielding door 13 is attached to the outlet 12 so as to be openable and closable. ing.

More specifically, the apparatus main body 1 is provided with four apparatus frames 14 standing vertically on the front, rear, left and right sides of the entire apparatus main body 1 in the vertical direction, and arranged around the four apparatus frames 14. The front and rear walls 15a and 15b, the left and right walls 15c and 15d, and the ceiling wall 15e are formed into a substantially rectangular parallelepiped shape. And the front and rear walls 15a, 15
The openings 11 are formed at the center of the b in the height direction, and the outlets 12 are formed at the center of the right side wall 15c in the height direction, that is, at a position facing the side of the conveyor 2.
By doing so, the front and rear sides of the left and right sides of each of the openings 11,
A structure in which parts of the rear walls 15a and 15b and the device frame 14 are left, and parts of the left side wall 15c are left in front of and behind the outlet 12 so that both sides of the opening 11 are supported (double-sided structure). Therefore, the strength of the apparatus body 1 is improved.
In the figure, 16 is a display for displaying an operation at the time of inspecting a foreign matter, and 17 is a display for displaying a transmission image of a foreign matter by X-ray. Reference numeral 18 is a strip-shaped flexible X-ray shielding curtain containing lead suspended in the opening 11.

FIG. 2 is a side view of the entire transfer conveyor 2, and FIG. 3 is a plan view thereof. The conveyor 2 includes a conveyor frame 21, a drive roller 22 supported via drive shafts 22a on both sides in the front-rear direction, and a driven roller 23 supported via driven shafts 23a.
A conveyor belt 24, which is an endless flat belt suspended around the rollers 22 and 23, is provided. The conveyor frame 21 includes a long frame body 21a,
It is composed of a short frame small piece 21b provided on the rear end side of the frame main body 2b.
As shown by the chain double-dashed line in FIG. 2, the bending fulcrum shaft 25 extending in the left-right direction is centered around the bending la of FIG. 1a. A drive unit 3 including a power source 30 such as a motor is provided on the lower front side of the transport belt 24.
0 is provided, and the endless belt 30c is provided between the drive wheel 30b provided on the drive shaft 22a and the driven wheel 22b provided on the drive shaft 22a.
And the transport belt 24 is rotated by the drive shaft 23a. In this embodiment, a ceiling member 21c facing the inner surface of the conveyor belt 24 is integrally provided on the upper side of the frame body 21a and the frame small piece 21b.

In FIGS. 2 and 3, the frame main body 21a provided on the transfer conveyor 2 has X in the middle in the longitudinal direction.
Two shield members 81, 81 are provided at the front and rear portions of the line passing portion 2a.
Is attached to the frame main body 21a while extending in the left-right direction (lateral direction) over the entire width of the conveyor 2. With this configuration, when the foreign matter is inspected in the article M, the shielding member 81 suppresses leakage of X-rays and scattered rays emitted from the X-ray generation unit 3 in the front-back direction of the apparatus body 1.

4 and 5 show the conveyor frame 2
2 is a vertical cross-sectional view and a plan view showing a frame small piece 21b in FIG. Frame piece 2 shown in FIG.
A rectangular elongated hole 26 extending in the front-rear direction FR is formed on the front end side (rear side) of the bracket 31 attached to 1b, while the elongated hole 26 is formed at the end of the shaft 23a of the driven roller 23. A rectangular sliding portion 23b to be inserted is formed so as to project. As shown in FIG. 5, the bracket 31, the long hole 26, and the sliding portion 23b are provided as a left and right pair. Then, by inserting the sliding portion 23b of FIG. 4 into the long hole 26, the frame small piece 21b is inserted.
The shaft 23a is supported so as to be movable back and forth along the elongated hole 26 and not relatively rotatable. At this time, the driven roller 23 is rotatably supported by the shaft 23a, and the transport belt 24 runs while the roller 23 rotates.

On the bending base end side (front side) of the frame small piece 21b, a bent portion 33 is formed by bending a part of the small piece 21b at a right angle.
Is formed, and the screw rod 27 is rotatably supported by the bent portion 33. The plate member 2 is attached to the screw rod 27.
8 is screwed, and a spring 29 for pressing the driven roller 23 outward is provided between the plate member 28 and the sliding portion 23b. In this manner, when the plate member 28 is moved back and forth with respect to the frame small piece 21b by screwing the screw rod 27, the driven roller 23 is moved back and forth along the elongated hole 26 via the spring 29, Driven roller 23 and drive roller 2
The length between the two is adjusted. As a result, the transport belt 24
Even if the lengths of the articles M are not uniform, proper tension is always applied to the conveyor belt 24, and the article M can be satisfactorily conveyed.

In this embodiment, the frame piece 21 is
A ceiling member 34 facing the inner surface of the transport belt 24 is integrally provided on the upper part of b, and the left and right end portions of the ceiling member 34 are provided at both left and right edge portions of the back surface of the transport belt 24. A step portion 35 is formed to avoid the protruding edge portion. A ceiling member 34 is similarly provided on the frame body 21a side, and step portions 35 are formed on both side edges thereof. By arranging the projecting edges of the transport belt 24 along these step portions 35, the lateral displacement of the transport belt 24 is prevented.

The bending fulcrum shaft 25 is located below a straight line L connecting the rotational axes of the rollers 22 and 23 when the frame body 21a and the frame piece 21b shown in FIG. 2 are linear. . With this configuration, when the frame piece 21b is linear with respect to the frame body 21a, the frame piece 21b always tries to bend upward about the bending fulcrum shaft 25 due to the elastic restoring force of the transport belt 24. At this time, the frame small piece 21b comes into contact with the ceiling member 34 on the frame main body 21a side, and the upward bending of the frame small piece 21b is prevented. Further, since the bending fulcrum shaft 25 is located below the rotation axis, the bending of the frame small piece 21b to the lower side does not occur. As a result, the frame body 21a and the frame piece 21b are stably supported in a linear posture by the elastic restoring force of the transport belt 24, and the article M can be reliably transported to the front F.

FIG. 6 is a side view showing a structure for supporting the conveyor 2 on the apparatus main body 1. A first engaging portion 41 projecting outward on the left and right sides at the front part (right end in FIG. 6) of the frame main body 21a of the transport conveyor 2, and projecting outward on the left and right sides at the rear part of the frame piece 21b. The 2nd engaging part 42 is provided, respectively. On the other hand, a support member 3 is provided below the drive unit 30 supported by the apparatus body 1.
0d is provided, and on the left and right sides of this support member 30d,
First and second arms 51, 52 extending in a V shape in side view
The arm member 5 provided with is attached. This first
The first receiving portion 53 is formed on the upper end of the tip of the arm 51.
A second receiving portion 54 is formed on the upper end of the tip of the arm 52. The conveyor 2 has a first and a second engaging portion 4 thereof.
1, 42 are engaged with the first and second receiving portions 53, 54 of the arm member 5 which is a member on the apparatus main body 1 side,
It is attached to the apparatus main body 1 via the arm member 5.

The first and second engaging portions 41 are cylindrical protrusions protruding laterally of the conveyor frame 21. The first receiving portion 53 disengages the first engaging portion 41 from a direction substantially parallel to the transport direction F, and the first engaging portion 41 is engaged and disengaged.
Is formed in a laterally-opened U-shape that is open to the rear and regulates the displacement in the vertical direction. The second receiving portion 54 is the second engaging portion 4
2 is formed in a vertically-oriented U shape that is open upward and restricts the displacement of the second engaging portion 42 in the front-rear direction by engaging and disengaging from the upper side of the transport surface of the transport conveyor 2.

Next, the operation of the inspection apparatus having the above configuration will be described. First, when performing the foreign matter inspection,
As shown by the solid line, the frame main body 21a and the frame small piece 21b are linear, and the drive and driven rollers 2
The conveyor belt 24 suspended between the Nos. 2 and 23 is also linear and is set in the apparatus main body 1 as shown in FIG. Then, the article M transported by the transport belt 24 is irradiated with X-rays from the upper X-ray generation unit 3, and the foreign matter in the article M is displayed on the display 17 as a transmission image and detected.

Next, when the entire transfer conveyor 2 including the transfer belt 24 and the conveyor frame 21 is taken out and the cleaning operation is performed, the transfer conveyor 2 is engaged with the arm member 5 as shown by the phantom line in FIG. In the combined state,
The frame piece 21b of the conveyor 2 is attached to the frame body 2
By forcibly bending the 1a downward around the bending fulcrum shaft 25, the first engaging portion 41 at the front portion of the transport conveyor 2 is moved in the horizontal direction to be disengaged from the first receiving portion 53. Then, the second engaging portion 42 is moved upward by lifting the rear portion of the transport conveyor 2 to move the second receiving portion 5
Remove from 4. The conveyor 2 thus removed has an outlet 12 provided on the side portion of the apparatus main body 1 in the entire length.
Is shorter than the front-rear length, that is, the length is such that the conveyor 2 can be taken out to the side of the apparatus main body 1. In this state, the transfer conveyor 2 is taken out sideways from the outlet 12, so that the transfer conveyor 2 can be easily removed from the apparatus main body 1. Further, due to the bending, the distance between the driving roller 22 and the driven roller 23 is shortened, so that the conveyor belt 24 can be easily removed in the lateral direction.

The procedure for removing the conveyor 2 is as follows:
The rear side (left side in FIG. 6) of the transfer conveyor 2 is provided with the first engaging portion 4
1 is rotated upward, and the second engaging portion 42 is first rotated.
Is removed from the second receiving portion 54, and thereafter, the conveyor 2
By moving the first engaging portion 41 from the first receiving portion 53 by moving the first rear portion substantially horizontally, the engagement of the conveyor 2 with the apparatus main body 1 is released, and then the frame. The small piece 21b may be forcibly bent downward with respect to the frame body 21a about the bending fulcrum shaft 25.

Similarly, it is possible to easily set the washed conveyor 2 in the apparatus main body 1. In other words, the transport conveyor 2 that has been bent and shortened is transferred from the outlet 12 to the main body 1 of the apparatus.
It is put in the inside, and the frame small piece 21b is rotated upward and returned to the original position where it is linear with the frame main body 21a.

By thus reducing the overall length of the conveyer conveyor 2 to a length that allows it to be taken out from the outlet 12, as described above, the entire opening of the apparatus main body 1 has a double-sided support structure. The strength of the device body 1 can be improved.

Further, the conveyor 2 is displaced in the vertical direction and the front-back direction with respect to the apparatus main body 1 side through the first and second engaging portions 41 and 42 and the first and second receiving portions 53 and 54. The article M is mounted without any trouble, and the article M is stably conveyed without rattling of the conveyor 2. In particular, since the vertical displacement of the article M is suppressed, image processing is performed based on the X-rays received by the X-ray receiving unit 20, and the display 17 is displayed.
When it is displayed on the display screen, the display screen is stable and the detection accuracy of foreign matter is improved.

FIG. 7 is a side view showing the second embodiment.
In the figure, unlike the case described above, the frame 21 of the conveyor 2 is replaced with the frame body 21a and the frame small pieces 21.
One linear frame 21 is used without being divided into b. Then, as in FIG. 6, the frame 21
First engaging portion 41 that protrudes outward on the left and right sides at the front of the
Further, second engaging portions 42 projecting outward are provided on the left and right sides of the rear portion of the frame 21, respectively. On the other hand, arm members 5 having first and second arms 51 and 52 extending in a V shape in a side view are attached to both left and right sides of a support member 30d provided below the drive unit 30.
The first engaging portion 4 is provided on the upper end of the first arm 51.
1 is engaged and disengaged from a direction substantially parallel to the transport direction F, and a laterally-opened first U-shaped first receiving portion 53 that restricts the displacement of the first engaging portion 41 in the vertical direction by engagement is formed. .
The second engaging portion 4 is provided on the upper end of the second arm 52.
2 is engaged with and disengaged from the upper side of the transport surface of the transport conveyor 2 to form a second U-shaped vertical receiving portion 54 with an upper opening that restricts the displacement of the second engaging portion 42 in the front-rear direction FR by engagement. Has been done.

According to this inspection apparatus, the conveyer conveyor 2 is arranged in the vertical and front-back directions with respect to the apparatus main body 1 via the first and second engaging portions 41 and 42 and the first and second receiving portions 53 and 54. The X-ray inspection of the conveyed article M is performed stably and accurately without being displaced. Even if the conveyor 2 is not bendable, the conveyor 2 can be easily taken in and out of the apparatus body 1. For example, at the time of taking out the transport conveyor 2, as shown by the phantom line in FIG. 7, the rear side of the transport conveyor 2 (the left side in FIG. 7) is rotated upward about the first engaging portion 41 to move the first portion. 2 engaging part 4
2 is separated from the second receiving portion 54, and then the conveyor 2
The first engaging portion 41 is disengaged from the first receiving portion 53 by moving the to the rear side substantially horizontally.

After releasing the engagement of the transport conveyor 2 with the apparatus main body 1 in this manner, one end of the front and rear of the transport conveyor 2 is connected to one of the openings 11 provided in the front and rear of the apparatus main body 1, for example, a rear opening. While largely projecting to the rear side from the portion 11, the transport conveyor 2 is pulled out from the outlet 12 (FIG. 1) of the apparatus main body 1 with the front end portion as the head, or the transport conveyor 2 is slanted in the vertical direction. Alternatively, the conveyor 2 is pulled out in the front-rear direction from one of the front and rear openings 11. In this way, the conveyor 2 can be easily taken out.
Further, similarly, the setting of the transfer conveyor 2 in the apparatus main body 1 can be easily performed.

FIG. 8 shows the third embodiment, and is a side view showing a state where the conveyor 2 is mounted on the arm member 5, and FIG. 9 is a side view showing a state when the conveyor 2 is removed from the arm member 5. . In these figures, as in the case of FIG. 2, the conveyor frame 21 of the conveyor 2 is formed by a frame body 21a and a frame small piece 21b, and the frame small piece 21b extends in the left-right direction with respect to the frame main body 21a. It is bendable up and down around 25. As a result, the length of the transport conveyor 2 in the transport direction F can be shortened.

A first engaging portion 41 projecting outwardly on the left and right sides at the front part of the frame body 21a, and a third engaging portion 43 projecting outward on the left and right sides at the rear part of the frame piece 21b. Each is provided. On the other hand, on the front side of the pair of left and right arm members 5, the first engaging portion 41 is engaged and disengaged from the direction substantially parallel to the transport direction F, and the first engaging portion 41 is vertically moved by the engagement. A rearwardly-opening first U-shaped first receiving portion 53 that restricts displacement is formed. Further, on the rear side of the arm member 5, the third engaging portion 43 is engaged and disengaged from the direction opposite to the first engaging portion 41, and the third engaging portion 43 is vertically moved by the engagement. A third U-shaped third receiving portion 55 that is open forward and restricts the displacement of the first receiving portion 53 is formed to face the first receiving portion 53.

According to this inspection apparatus, as shown in FIG. 9, the frame main body 21a and the frame small piece 21b are lifted in the direction of the arrow U from the bending fulcrum shaft 25 thereof.
When 1 is bent into an inverted V shape, the conveyor 2 is shortened, the first and third engaging portions 41 and 43 are disengaged from the first and third receiving portions 53 and 55, and the engagement is released. The conveyor 2 can be easily removed from the arm member 5 on the apparatus body 1 side. In this way, by taking out the conveyor 2 laterally from the outlet 12 (FIG. 1), the conveyor 2 can be taken out easily. Further, when the transport conveyor 2 is mounted in the apparatus main body 1, the frame 2 is inserted into the inside through the outlet 12 while being bent into an inverted V shape, and then the frame main body 21a and the frame small piece 21b are inserted in the direction of arrow D. The first and third engaging portions 41 and 43 are engaged with the first and third receiving portions 53 and 55 as shown in FIG. 8 while being pushed down.
As a result, the conveyor 2 is linear and easily set on the arm member 5. Further, like the first embodiment, the conveyor belt 24 can be easily removed in the lateral direction.

In this inspection apparatus, as described above,
The conveyor frame 21 is formed of a frame body 21a and a frame piece 21b, and the frame piece 21b and the frame body 21a are bendable around a bending fulcrum shaft 25. The frame piece 21b may be slidably connected to the frame body 21a, which is the other part, in the front-rear direction FR so that the length of the transport conveyor 2 in the transport direction F can be shortened. In that case, the first and third engaging portions 41, 43 are engaged with and disengaged from the first and third receiving portions 53, 55 in a state where the conveyor 2 is shortened by sliding.

Further, in the first and second embodiments, a locking tool for fixing the conveyor 2 to the arm member 5 may be provided. Specifically, the locking tool includes a locking operation body and a hook, the locking operation body is attached to the arm member 5, and a hook that engages with the locking operation body from above is provided on the conveyor frame 21. The conveyor frame 21 is fixed to the arm member 5 by pulling down the locking operation body while being engaged with the hook. When removing the transport conveyor 2,
The locking operation body is operated to lock and release the locking tool. By this locking tool, the vertical displacement of the conveyor 2 is suppressed more reliably, and the accuracy of X-ray inspection is improved.

[0043]

As described above, according to the present invention,
Despite using a conveyor that is longer than the length of the apparatus body in the conveying direction, while strengthening the strength of the opening through which the conveyor conveys in the apparatus body as a support structure on both sides,
The entire transport conveyor can be easily put in and taken out of the device body.

[Brief description of drawings]

FIG. 1 is a perspective view showing an X-ray foreign matter inspection apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view of a transfer conveyor used in the apparatus.

FIG. 3 is a plan view of a transfer conveyor used in the apparatus.

FIG. 4 is an enlarged side view showing a main part of the transfer conveyor.

FIG. 5 is a plan view showing a main part of the transfer conveyor.

FIG. 6 is a side view showing a support structure of the transfer conveyor.

FIG. 7 is a side view showing a conveyor according to a second embodiment.

FIG. 8 is a side view showing a state in which the transfer conveyor according to the third embodiment is mounted.

FIG. 9 is a side view showing a state when the transfer conveyor according to the third embodiment is removed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Device main body, 14 ... Device frame, 2 ... Conveyor, 2a ... X-ray passage part, 21 ... Frame, 21a ... Other part of frame (frame main body), 21b ... One end part (frame piece) of frame, 25 ... Bending fulcrum axis, 3 ... X-ray generation part, 20 ... X-ray receiving part, 41 ... First engaging part, 42 ... Second
Engaging portion, 43 ... Third engaging portion, 53 ... First receiving portion, 54 ... Second receiving portion, 55 ... Third receiving portion, 81 ... X-ray shielding member, F ... Conveying direction, FR ... Front-rear direction, M ... Article

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-11-194104 (JP, A) JP-A-9-250992 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01N 23/00-23/227

Claims (7)

(57) [Claims] 1. X is carried while carrying an article by a carrying conveyor.
Performing foreign matter inspection in the article with a line, the transport conveyor is an inspection device that is detachable from the apparatus body, the transport conveyor, the length is longer than the length of the device body in the transport direction. An X-ray foreign matter inspection apparatus in which one end of the frame of the conveyor is set to be bendable around a bending fulcrum axis extending in the left-right direction orthogonal to the conveyance direction with respect to the other part of the frame. 2. The frame according to claim 1 , wherein the frame of the conveyor is provided with a first engaging portion, and the first engaging portion is engaged with the apparatus main body in a direction parallel to the conveying direction, An X-ray foreign matter inspection apparatus provided with a first receiving portion for restricting the vertical displacement of the first engaging portion. 3. According to claim 2, further the second engaging portion is provided in the frame of the conveyor, the apparatus main body, the second engagement portion is engaged with the upper direction of the conveying surface, the second engagement An X-ray foreign matter inspection apparatus provided with a second receiving portion that regulates displacement of the joining portion in the front-rear direction. 4. The third engagement portion according to claim 2 , further comprising a third engagement portion provided on the frame of the conveyor, wherein the third engagement portion is parallel to the conveyance direction on the apparatus body. The X-ray foreign matter inspection apparatus is provided with a third receiving portion that is engaged from the opposite direction to the portion and that regulates the vertical displacement of the third engaging portion. 5. An inspection apparatus in which foreign matter in an article is inspected by X-rays while the article is being conveyed by a conveyor, and the conveyor is detachable from the main body of the apparatus. The length is longer than the length of the device body in the transport direction, the frame of the transport conveyor is provided with a first engaging portion, and the device body is provided with the first engaging portion from a direction parallel to the transport direction. A first receiving portion that is engaged and regulates the displacement of the first engaging portion in the vertical direction is provided, and further, a second engaging portion is provided on the frame of the transport conveyor, and the device main body has: An X-ray foreign matter inspection apparatus in which the second engaging portion is engaged from above in the conveying surface, and a second receiving portion is provided for restricting displacement of the second engaging portion in the front-rear direction. 6. In any one of claims 1 to 5, and X-ray generating unit for irradiating the X-rays from above the conveyor, the X-ray passing portion of the conveyor is irradiated from the X-ray generator An X-ray receiving unit that receives the X-rays that have passed therethrough is provided below the transport conveyor, and an X-ray shielding member that extends in the left-right direction before and after the X-ray passage unit of the transport conveyor to shield the X-rays. Wire foreign matter inspection device. 7. The X-ray foreign matter inspection apparatus according to claim 1 , wherein the apparatus main body includes apparatus frames that are provided upright on the left and right sides in the carrying direction of the carrying conveyor.