JP2003050216A - X-ray inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray inspection device capable of providing a good operation rate being applied to an inspection line of food or the like while keeping the device clean with simple work and excellent cleaning performance of a conveyor and a peripheral region of the conveyor for conveying an inspected object between an X-ray source and an X-ray detector. SOLUTION: A conveyor chamber 1 wherein the conveyor 4 for conveying the inspected object is arranged, is watertightly partitioned from a conveyor lower chamber 3 below, and a driving motor 41 for the conveyor 4 is arranged in the conveyor lower chamber 3. A belt 42c for transmitting power is wound around a pulley 42b at the end part of the conveyor 4, and the conveyor 4 is detachable from the conveyor chamber 1 by attaching and detaching mechanisms 61, 62. A door 11 of the conveyor chamber 1 is integrally provided with a belt cover 15 for covering the belt 42c. The conveyor chamber 1 can thereby be washed in water in the removed state of the conveyor 4 while facilitating the attaching and detaching work of the conveyor 4.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-destructive inspection apparatus using X-rays, and more particularly, to an X-ray source and an X-ray source by transporting an object to be inspected by a conveyor. The present invention relates to an X-ray inspection apparatus suitable for use in, for example, a food manufacturing factory line or the like, which allows passage between detectors and allows the conveyor to be washed with water. 2. Description of the Related Art Generally, in an X-ray inspection apparatus, the presence or absence of foreign matter is determined from an X-ray fluoroscopic image of an object to be inspected. A conveyor is arranged between the X-ray source and the X-ray detector, and the inspected objects are sequentially conveyed by the conveyor, and the presence or absence of foreign matter is sequentially determined from the X-ray fluoroscopic images of the inspected objects. It is often used in structures that go down. In this type of X-ray inspection apparatus, X-rays from an X-ray source are output vertically downward as a fan-like beam that spreads only in a one-dimensional direction by a slit or the like, and the X-ray source is below the X-ray source. , A conveyor for transporting an inspection object in a direction orthogonal to the X-ray spread direction is arranged, and a one-dimensional X-ray detector in which detection elements are arranged in the X-ray spread direction is arranged below the conveyor. Take. [0004] By the way, when an X-ray inspection apparatus provided with a conveyor for transporting an object to be inspected as described above is used in a food inspection line, at least an object to be inspected has conventionally been used. There is a demand to wash the conveyor for transporting the water and its surroundings with water. Therefore, it is conceivable that the area where the conveyor is arranged is made water-tight so that the area can be washed with water. However, when the area is washed with water while the conveyor is arranged, the workability is poor. There is a problem that the cleaning is bad and the cleaning cannot be performed efficiently. It is an object of the present invention to provide an X-ray source and an X-ray source.
The conveyor that transports the object to be inspected between the line detectors and the surrounding area are easy to clean, and by applying it to inspection lines for food etc., the operation rate can be maintained while keeping the equipment clean by simple work. An object of the present invention is to provide an X-ray inspection apparatus that can be improved. In order to achieve the above object, an X-ray inspection apparatus according to the present invention is provided with a conveyor for transporting an inspection object between an X-ray source and an X-ray detector. In the X-ray inspection apparatus, a conveyor lower chamber partitioned from the conveyor chamber in a watertight manner is provided below the conveyor chamber in which the conveyor is provided, and the X-ray detector and the drive of the conveyor are provided. The driving motor is housed in a lower chamber of the conveyor, and the power of the driving motor is transmitted to a pulley mounted on an end of the conveyor by a belt, and the conveyor is driven by a detaching mechanism. It is characterized in that a cover that covers the belt is provided integrally with a door that is detachably provided in the room and that opens and closes the conveyor room. According to the present invention, there is provided an X-ray detector which requires a waterproof inside thereof, provided below the conveyor room provided with the conveyor, a lower conveyor room which is watertightly partitioned from the conveyor room. By arranging the motor for driving the conveyor, and making the conveyor detachable from the conveyor room, it is possible to wash the conveyor room with the conveyor removed, and to remove the conveyor, The intended purpose is achieved by facilitating attachment and detachment of a belt cover that connects the conveyor driving motor and the conveyor. That is, in the present invention, a conveyor for transporting an object to be inspected is removably disposed by a detachable mechanism in a conveyor room provided between an X-ray source and an X-ray detector, and its driving is performed. The motor is arranged together with the X-ray detector in a lower chamber of the conveyor which is partitioned watertight below the conveyor chamber, and its power is transmitted by a belt via a pulley attached to the end of the conveyor. Then, the cover of the belt is provided integrally with a door that opens and closes the conveyor chamber. With this configuration, the conveyor chamber and the conveyor itself can be easily washed with water by opening the door of the conveyor chamber and operating the attachment / detachment mechanism to remove the conveyor. In addition, when attaching and detaching the conveyor, it is necessary to attach and detach the power transmission belt when attaching and detaching the conveyor. It will be easier. Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a right side view thereof.
FIG. 3 is a front view showing the internal structure with the front door or cover removed, and FIG. 4 is a right side view showing the internal structure with the right side cover seen through. The apparatus comprises a middle conveyor room 1, an electric equipment room 2 provided above and below the conveyor room 1, and a lower conveyor room 3.
It is constituted by. A display device 21 for monitoring is provided above the electrical equipment room 2. The conveyor chamber 1 has both left and right sides open, and a door 11 which can be opened and closed by operating a handle 11a at the front, and a hinge 11 provided at a lower side thereof. Open and close around the center.
A conveyor 4 for transporting an object to be inspected is arranged in the conveyor chamber 1. The structure of the conveyor 4 and its support structure will be described later in detail. Reference numeral 13 denotes a strip-shaped rubber curtain. The electrical equipment room 2 accommodates most electrical components including the X-ray source 7 and peripheral components such as a cooling fan. The X-ray source 7 is provided with a slit 71,
The X-rays from the radiation source 7 pass through the slits 71 and are radiated vertically downward as fan-shaped beams that spread only in a one-dimensional direction perpendicular to the plane of FIG. The lower conveyor 3 is provided with a belt conveyor 4.
And the X-ray detector 8 are accommodated. The motor 41 and the X-ray detector 8 are mounted on a housing 32 provided in the lower conveyor chamber 3. The X-ray detector 8 is a one-dimensional detector in which a plurality of detection elements are linearly arranged. The slit 71 is opposed to the X-ray source 7 with its light receiving surface directed vertically upward. The detection elements are arranged so as to line up in the direction in which the transmitted X-rays spread. The conveyor chamber 1 and the lower conveyor chamber 3 are separated by a bottom plate 12 of the conveyor chamber 1. As shown in a plan view of FIG. 5A and a front view of the vicinity of the bottom plate 12 in FIG. Conveyor lower room 3
Is fixed to the upper end of the peripheral wall in a sealed state using a filler. The bottom plate 12 is formed with a slit-shaped small window 12a corresponding to the light receiving surface of the X-ray detector 8, and the small window 12a is made of a plate material 12b made of a nonmetallic material such as a carbon plate. Covered by
The entire periphery of the plate 12b is adhered to the surface of the bottom plate 12 with an adhesive 1
By sealing with 2c, a watertight structure is formed. Next, the structure of the conveyor 4 and its support structure will be described in detail below. 6A and 6B are explanatory views of the conveyor 4, in which FIG. 6A is a partial cross-sectional plan view showing a state where the conveyor belt 4d is removed, and FIG. FIG. 7 is a perspective view of the vicinity of the drive roller 4b of the conveyor 4, and shows a state where the door 11 of the conveyor chamber 1 is removed. Further, FIG. 8 is a perspective view of the conveyor chamber 1 in a state where the conveyor 4 is removed and the support rollers 5a and 5b are left. The conveyor 4 is a belt conveyor in this example, and has a structure in which a conveyor belt 4d is looped between a driving roller 4b rotatably supported at both ends of a frame 4a and a driven roller 4c. At the same time, a plate 4e, which is located inside the loop of the conveyor belt 4d and supports the conveyor belt 4d above the loop, is attached to the frame 4a. The conveyor belt d does not bend because the upper surface of the loop abuts against the upper surface of the plate 4e during traveling, so that the support height of the inspection object transported on the conveyor belt 4d is always constant. Is kept. In addition,
L in the figure is a conveyor belt 4d and a plate 4e at the time of washing with water.
Are protrusions for preventing close contact via a water layer therebetween, and S is a slit corresponding to the light receiving surface of the X-ray detector 8. The above-described conveyor 4 is supported by a pair of support rollers 5a and 5b provided on the bottom plate 12 of the conveyor chamber 1. The supporting structure of the conveyor 4 is shown in FIGS.
Referring to FIG. 8 and FIG. 8, the conveyor 4 is configured such that the lower surface of the lower side of the loop of the conveyor belt 4d is supported by the support rollers 5a and 5b,
a, 5b, a total of four buckles 61 provided on both sides in the axial direction of the frames 51a, 51b.
Is fixed by locking a total of four locking pieces 62 fixed to the frame 4a. Further, separate buckles 63 are provided on both sides of the frames 51a, 51b of the support rollers 5a, 5b in the axial direction, respectively. The buckles 63 are attached to the front wall 31 and the rear wall of the lower conveyor chamber 3 respectively. By locking the locking pieces 64 fixed to the body (not shown), each support roller 5a, 5b
Are fixed in the conveyor chamber 1. The buckles 61 and 63 have the same structure, respectively. The buckle bodies 61a and 63a rotatably support one ends of the operation pieces 61b and 63b, and the operation pieces 61b and 63b have It has a structure in which the angular rings 61c and 63c are swingably supported at a position at a predetermined distance from the rotation center to the other end, and the operation pieces 61b and 63b
Are rotated to the rotation center side, and the angular rings 61c and 63 are rotated.
c is hooked on the locking pieces 62, 64, which are mating members, and the operating pieces 61b, 63b are rotated to the other end side in this state, whereby the angular rings 61c, 63c are locked.
, So that the members to which the buckles 61 and 63 are attached and the locking pieces 6
The members to which the members 2 and 64 are attached are attached to each other, and the members are detached from each other by the opposite operation. The above-described conveyor 4 operates by driving a motor 41 disposed in the above-described lower conveyor chamber 3, and the motor 41 is a motor with a speed reducer, and its output shaft is connected to the lower conveyor chamber 3. 3 front wall 31
A timing pulley 42a is fixed to the tip of the projection, as shown in FIG. Then, a timing belt 42c is wrapped around the timing pulley 42a and the timing pulley 42b fixed to one end of the drive roller 4b of the conveyor 4, so that the conveyor 4 operates by the driving of the motor 41. It is configured. The power of the motor 41 is transferred to the conveyor 4.
The timing belt 42c to be transmitted to the conveyor chamber 1 is disposed at a position protruding right forward of the conveyor chamber 1 in the front view shown in FIG. 11 are integrally attached. According to the above embodiment of the present invention, the conveyor 4 can be removed simply by opening the door 11 of the conveyor chamber 1 and operating the operating pieces 61b of the four buckles 61. Accordingly, the two support rollers 5a and 5b can be removed only by operating the operation pieces 63b of the four buckles 63. Then, the conveyor chamber 4 can be washed with water while the conveyor 4 or the supporting rollers 5a and 5b in addition thereto are removed. That is, the conveyer chamber 1 uses a bottom plate 12 made of a single metal plate, so that it is watertight below the conveyer lower chamber 3 that houses the X-ray detector 8 and the conveyor drive motor 41. Therefore, even if the conveyor chamber 4 is washed with water, water does not enter the lower conveyor chamber 3. When the conveyor 4 and the support rollers 5a and 5b are removed, the inside of the conveyor chamber 1 is surrounded by a substantially flat wall having no protrusions, so that the washing operation is extremely easy. Also, the conveyor 4 and the supporting rollers 5a and 5b can be freely washed with water at an appropriate place by removing them from the conveyor chamber 1, so that the washing operation is also facilitated. Further, when removing the conveyor 4 and attaching it after cleaning, the belt cover 15 covering the power transmission timing belt 42c is integrally attached to the door 11 of the conveyor chamber 1. The timing belt 42c appears when the door is opened, and the timing belt 42c is covered with the belt cover 15 when the door 11 is closed. In the above embodiment, the conveyor 4 and, in addition, the support rollers 5a and 5b are removably arranged in the conveyor chamber 1 by an attachment / detachment mechanism including buckles 61 and 63 and locking pieces 62 and 64. Although the above-described example has been described, the attachment / detachment mechanism is not limited to this, and other known mechanisms can be adopted. Further, in the above embodiment, the structure in which the conveyor 4 is supported by the supporting rollers 5a and 5b is adopted, but the supporting structure of the conveyor 4 is not limited to this, and the conveyor 4 may be mounted in the conveyor chamber. Other support structures can be adopted as long as they are detachably mounted to the device 1 via a detachable mechanism. As described above, according to the present invention, a conveyor chamber for transporting an object to be inspected is arranged between an X-ray source and an X-ray detector, and a conveyor lower chamber below the conveyor chamber. A conveyor drive motor is housed in the lower chamber of the conveyor, the power is transmitted to the pulley at the end of the conveyor by a belt, and the conveyor is detachably mounted to the conveyor chamber by a detachable mechanism. In addition, since the power transmission belt cover is provided integrally with the conveyor room door, the conveyor room can be washed with water while the conveyor is removed from the conveyor room. In the necessary belt attaching / detaching work, the cover covering the belt is automatically attached / detached by opening / closing the door of the conveyor chamber, and the inspection object is conveyed. The conveyor and its surrounding area can be washed with very good workability, and by applying it to the inspection line of food etc., the operation rate is good while keeping the equipment clean by simple work. It becomes possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an embodiment of the present invention. FIG. 2 is a right side view of FIG. FIG. 3 is a front view showing the internal structure of the embodiment of the present invention with the front door or cover removed. FIG. 4 is a right side view showing the internal structure of the embodiment of the present invention in a state where the right side cover is seen through; 5A and 5B are explanatory views of a bottom plate 12 of the conveyor chamber 4 according to the embodiment of the present invention, wherein FIG. 5A is a plan view and FIG. 5B is a front view near the bottom plate 12. FIG. 6 shows a belt conveyor 4 according to the embodiment of the present invention.
(A) is a partial cross-sectional plan view showing a state in which a conveyor belt is removed, and (B) is a view on arrow B. FIG. 7 shows a belt conveyor 4 according to the embodiment of the present invention.
FIG. 3 is a perspective view of the vicinity of a driving roller 4b of the conveyor chamber 1;
FIG. 3 is a view showing a state in which a door 11 is removed. FIG. 8 is a perspective view of the conveyor chamber 1 according to the embodiment of the present invention.
It is a figure showing in the state where a and 5b were left. [Description of Signs] 11 Conveyor room 11 Door 12 Bottom plate 12a Small window 12b Plate material 12c made of nonmetallic material Adhesive 15 Belt cover 2 Electrical installation room 3 Conveyor lower room 4 Belt conveyor 4a Frame 4b Drive roller 4c Follower roller 4d Conveyor belt 4e Plate 41 Conveyor drive motors 42a, 42b Timing pulley 42c Timing belts 5a, 5b Support rollers 61, 63 Buckles 61a, 63a Buckle bodies 61b, 63b Operating pieces 61c, 63c Square rings 62, 64 Locking pieces 7 X-ray source 71 Slit 8 X-ray detector

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Claims (1)

Claims: 1. An X-ray inspection apparatus comprising a conveyor for transporting an object to be inspected between an X-ray source and an X-ray detector, wherein the conveyor is provided with the conveyor. A conveyor lower chamber partitioned from the conveyor chamber in a watertight manner is provided below the X-ray detector and the drive motor for the conveyor are housed in the conveyor lower chamber. Is configured to be transmitted to a pulley attached to the end of the conveyor by a belt, and the conveyor is detachably provided in a conveyor chamber by a detachment mechanism, and a door that opens and closes the conveyor chamber. An X-ray inspection apparatus, wherein a cover for covering the belt is provided integrally.