JP2011203668A - X-ray photographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray photographing device having a simple structure, and settable horizontally at the highest level near a top board only by pushing manually a cassette tray loaded with a cassette into a case from an inclined state.SOLUTION: The X-ray photographing device is described as follows: slide rail bases 10 are arranged in parallel on both sides of an image reception part case 2; the end of each slide rail base 10 is supported rotatively on the deep side; the slide rail base 10 is supported by a spring 12 and energized to the upside; a slide rail is engaged with the slide rail base 10 slidably; the cassette tray 1 is engaged with the slide rail slidably; the cassette tray 1 has a guide member 15 projected along a moving direction; and on the guide member 15, a horizontal part 16, and a tilt part 17 tilted toward the downside in succession to the horizontal part are formed continuously on the front side of the cassette tray 1, and an upper roller 18 and a lower roller 19 for sandwiching the guide member 15 from the upper side and the lower side to support it are arranged.

Description

  The present invention relates to an X-ray imaging apparatus that can be reliably set by manually pushing a cassette into a case.

In general, an X-ray imaging apparatus has an X-ray irradiation device disposed above a top plate on which a subject is lying, and an X-ray image receiving device disposed on the back side of the top plate. The X-ray image receiving apparatus includes a tray on which a cassette containing a film is placed and a tray storage unit (case) into which the tray is pushed into the back of the top plate. In an X-ray imaging apparatus, a method of reducing the distance between the top plate and the film surface has been proposed in order to obtain a clear image with a small blur while preventing an increase in magnification (see Patent Document 1).

As shown in FIG. 9, the saddle-type cassette positioning device of Patent Document 1 includes a gondola 31, a cassette tray 32, and a gondola rotating device 33 in a case body 30, and the gondola 31 has a rear end portion of the case body. 30 is pivotally attached to the upper rear end of the case 30 so that the front end can be rotated in the case body. The cassette tray 32 accommodates the cassette inwardly and slides back and forth on the upper surface of the gondola. The gondola rotating device 33 has a drive rod 34 provided at the rear of the bottom of the case body and an operating rod 35 provided below the front side of the gondola 31 so as to be raised and lowered. The drive rod 34 and the operating rod 35 are connected by a wire 36 so that the gondola 31 can be rotated from an inclined position to a horizontal position by winding the wire 36 around the drive rod 34. . Reference numeral 37 denotes a bellows material that prevents foreign matter from being inserted.

In the above-mentioned vertical cassette positioning device, the cassette tray 32 is pulled out from the entrance / exit 39 of the case body 30 by holding the handle 38, and the cassette is placed on the cassette tray 32, and then the cassette tray 32 is pushed into the case body. Is loaded.

When the cassette is loaded, the motor 40 is driven to wind the wire 36 around the drive rod 34, and both the rotating wheels 41 stand while pushing up the bottom of the gondola 31. When the microswitch senses that the gondola 31 has become horizontal, the motor 40 stops.

When the X-ray imaging is completed, when the motor 40 rotates in the reverse direction and the wire 36 is rewound, the gondola 31 gradually tilts downward, and when the bottom of the gondola 31 hits both holding pieces 41, the micro provided on the holding piece 41 The switch is activated to stop the motor 40. Thereafter, the cassette tray 32 is pulled out from the case body 30.

Japanese Patent Laid-Open No. 10-097016

  In the saddle type cassette positioning device described in Patent Document 1, the gondola cannot be brought into a horizontal state only by pushing the cassette tray. Therefore, after pushing the cassette tray, the motor is further driven to move the wire. It is necessary to stand up while rolling up and pushing up the bottom of the gondola with a rotating wheel. Further, after the X-ray imaging is completed, it is necessary to reversely rotate the motor to rewind the wire 38, tilt the gondola downward, operate the microswitch, and stop the motor.

  Therefore, the lying-down type cassette positioning device described in Patent Document 1 has the following problems.

(1) Since the cassette cannot be leveled only by manually pushing in the cassette tray, the cassette cannot be set quickly.

(2) Gondola rotating device composed of a motor, driving rod, operating rod, wire, etc., and electric drive means and control means such as motor start, stop, reverse rotation circuit, etc. are required for standing and tilting the gondola. The number of points increases and the structure becomes complicated.

(3) Since the motor is used, if the supply of electricity is stopped, the gondola cannot be raised and tilted and cannot be used.

  Therefore, the present invention is an X-ray having a simple structure that can be set horizontally to the top level near the top plate by simply pushing the cassette tray on which the cassette is placed into the case from an inclined state without using electrical means. An imaging apparatus is provided.

According to the first aspect of the present invention, a top plate support frame for supporting a top plate on which a subject is placed is fixed on a top plate support base, and the top plate support base is placed between the top plate support frame and the top plate support base. In an X-ray imaging apparatus comprising an image receiving unit case in which an image receiving unit is supported so as to be movable left and right, and the image receiving unit is a rectangular frame, and a cassette tray on and off the image receiving unit case is mounted on the cassette. A cassette tray doorway for the cassette tray to enter and exit is formed on the front side of the upper case, and slide rail bases are arranged in parallel in the width direction of the top support frame on both sides of the image receiving unit case. The part is rotatably supported at the back side opposite to the cassette tray entrance, and the slide rail base is supported by a spring and biased upward, and slides on the slide rail base. The cassette is slidably engaged, the cassette tray is slidably engaged with the slide rail, and a guide member protrudes along the direction of movement of the cassette tray, and the guide members are arranged horizontally on both sides of the cassette tray. The upper and lower rollers that support the guide member from above and below are formed on the front side of the cassette tray. It is arranged on the side.

The invention according to claim 2 is characterized in that a cushioning material is provided for the image receiving case when the cassette tray is raised deeper.

The invention according to claim 3 is characterized in that a resin roller for preventing the top plate from being bent is disposed on a lateral member provided in the width direction of the top plate support frame.

  In the present invention, the cassette is automatically set horizontally to the uppermost level of the case by a continuous operation of manually pushing the cassette tray into the case, so after setting in an inclined state as in Patent Document 1, Furthermore, it is not necessary to rotate it horizontally.

The present invention does not require a means for using electricity such as an electric drive means or a control means, so that it cannot be used due to a power failure. Further, since no rotation mechanism is required, the structure is simple and there is little risk of failure.

According to the present invention, a cassette having a simple structure can be set horizontally on the top level close to the top plate, and an increase in the enlargement ratio can be prevented and a clear image with small blur can be obtained.

In the present invention, the distance between the cassette tray and the top plate can be shortened by providing a resin roller for preventing the top plate from being bent on the cross member of the top plate support frame, and a clear image can be obtained.

1 is a perspective view showing the entire X-ray imaging apparatus of the present invention. It is a top view of the X-ray imaging apparatus of this invention. It is a side view of the X-ray imaging apparatus of this invention. It is a front view of the X-ray imaging apparatus of this invention. It is a perspective view which shows the whole image receiving part of the X-ray imaging apparatus of this invention. It is a perspective view which shows the state which pushed the tray in the middle in the image receiving part of the X-ray imaging apparatus of this invention. It is a perspective view which shows the state which pushed in and set the tray in the image receiving part of the X-ray imaging apparatus of this invention. FIG. 3 is a cross-sectional view of an image receiving unit of the X-ray imaging apparatus of the present invention, where (a) shows a state in which the tray is pulled out, (b) shows a state immediately before the tray is pushed in, and (c) shows that the tray is pushed in It is a figure which shows the state of. 1 shows a conventional saddle-type cassette positioning device, (a) a sectional view showing a state where the gondola is inclined, and (b) is a sectional view showing a state where the gondola is leveled.

  Embodiments of the present invention will be described with reference to the drawings.

1 to 4 show a state in which a cassette tray 1 on which a cassette C is placed is pulled out from the image receiving case 2, and a top plate support frame 3 that supports a top plate (acrylic plate) on which a subject (not shown) is placed. Is fixed on the top plate support 4. The top plate support 4 can normally be moved up and down by a link mechanism or the like (not shown).

An image receiving unit 5 is disposed between the top plate support frame 3 and the top plate support table 4, and the image receiving unit 5 is supported on the top plate support table 4 so as to be movable in the longitudinal direction of the top plate support frame 3. . The image receiving unit 5 includes an image receiving unit case 2 formed of a rectangular frame, and a cassette tray 1 on which a cassette C that enters and exits the image receiving unit case 2 is placed.

Resin rollers 7 that prevent the top plate from bending are disposed on the cross member 6 that is provided across the image receiving portion in the width direction of the top plate support frame 3. In order to prevent the top plate from being damaged when the top plate comes into contact with the resin roller 7, the resin roller 7 is made not to be rubbed by a rotating roller and uses a softer material than the top plate, for example, urethane or silicon as a resin. . By supporting the top plate with the resin roller 7 to prevent the top plate from being bent, the top plate does not touch the upper surface of the image receiving unit case 2, so that the distance between the cassette tray 1 and the top plate can be shortened. A clear image can be obtained.

  5 to 8, a cassette tray entrance 9 through which the cassette tray 1 enters and exits is formed on the front side of the image receiving unit case 2. On both sides in the image receiving unit case 2, slide rail bases 10 are arranged in parallel in the width direction of the top plate support frame 3. The end of the slide rail base 10 is supported by a blanket 11 so as to be rotatable on the back side opposite to the cassette tray inlet / outlet 9, and the other end of the cassette tray inlet / outlet 9 of the slide rail base 10 is moved up and down to be in a horizontal state or inclined. It will be in the state. The slide rail base 10 is supported from below by a spring 12 and biased upward. The slide rail base 10 prevents rolling by the rail presser 13.

A slide rail 14 is slidably engaged with the slide rail base 10, and the cassette tray 1 is slidably engaged with the slide rail 14. When the cassette tray 1 slides back and forth on the slide rail 14, the slide rail 14 also slides on the slide rail base 10, and the cassette tray 1 can be smoothly inserted and removed from the image receiving case 2.

  On both side surfaces of the cassette tray 1, guide plates 15 that serve as guide members protrude in the entire length along the moving direction. The guide plates 15 are provided on a horizontal portion 16 provided on the side surface of the cassette tray 1 and on the horizontal portion 16. Subsequently, an inclined portion 17 inclined downward is formed continuously on the front side of the cassette tray 1. When the cassette tray 1 is pushed in, the guide plate 15 of the cassette tray 1 is sandwiched and supported by an upper roller 18 and a lower roller 19 disposed at the end of the image receiving unit case 2 on the cassette tray inlet / outlet 9 side. Be guided.

A handle 20 that is gripped when the cassette tray 1 is moved is provided on the front surface of the cassette tray 1. Further, when the cassette tray 1 is lifted by the spring 12 on the upper surface of the cassette tray 1 or a part thereof, the cushion rubber 21 prevents a collision sound from being generated with other members such as the image receiving case 2. Is provided.

  Next, the operation of the X-ray imaging apparatus of the present invention will be described.

  After the image receiving case 2 is positioned and fixed on the top support 4 by moving in the longitudinal direction, the cassette tray 1 is moved from the image receiving case 2 by grasping the handle 20 as shown in FIG. Pull it out toward you and place the cassette on the cassette tray 1 you pulled out.

The cassette tray 1 on which the cassette is placed is pushed into the image receiving case 2 by grasping the handle 20. As shown in FIG. 8 (b), when the horizontal portion 16 of the guide plate 15 passes between the upper and lower rollers 18 and 19, the cassette tray 1 is inclined along the slide rail base 10 in an inclined state. When the inclined portion 17 passes through the upper and lower rollers 18 and 19, the inclined portion 17 is guided by the rollers 18 and 19, and the handle side of the cassette tray 1 is attached by the spring 12 of the slide rail base 10. While rising by force, it becomes horizontal as shown in FIG. In this way, it becomes possible to set the cassette tray 1 horizontally by simply pushing the cassette tray 1 into the image receiving case 2.

1: cassette tray 2: image receiving unit case 3: top plate support frame 4: top plate support base 5: image receiving unit 6: cross member 7: resin roller
9: Cassette tray entrance 10: Slide rail base 11: Blanket 12: Spring 13: Rail presser 14: Slide rail 15: Guide member 16: Horizontal portion 17: Inclined portion 18: Upper roller 19: Lower roller 20: Handle 21: Cushion Rubber 30: Case body 31: Gondola 32: Cassette tray 33: Gondola rotating device 34: Drive rod 35: Actuator rod 36: Wire 37: Bellows material 38: Handle 39: Entrance / exit 40: Motor 41: Holding piece C: Cassette

Claims (3)

A top plate support frame for supporting the top plate on which the subject is placed is fixed on the top plate support base,
An image receiving unit case in which an image receiving unit supported so as to be movable left and right on the top plate supporting table is disposed between the top plate supporting frame and the top plate supporting table, and the image receiving unit is a rectangular frame, and the image receiving unit case In an X-ray imaging apparatus consisting of a cassette tray on which a cassette is placed
A cassette tray entrance is formed on the front side of the image receiving unit case.
A slide rail base is arranged in parallel in the width direction of the top plate support frame on both sides in the image receiving unit case, and the end of the slide rail base is rotatably supported at the back side opposite to the cassette tray entrance and exit. The slide rail base is supported by a spring and biased upward,
The slide rail is slidably engaged with the slide rail base, and the cassette tray is slidably engaged with the slide rail.
The cassette tray has a guide member protruding along the direction of movement. The guide member has a horizontal portion on both side surfaces of the cassette tray and an inclined portion inclined downward toward the front side of the cassette tray. Formed continuously,
An X-ray imaging apparatus, wherein an upper roller and a lower roller that support a guide member sandwiched from above and below are disposed on an opening side of an image receiving unit case. The X-ray imaging apparatus according to claim 1, further comprising: a cushioning material for the image receiving case when the cassette tray is raised. 3. The X-ray imaging apparatus according to claim 1, wherein a resin roller for preventing the top plate from being bent is disposed on a lateral member provided in the width direction of the top plate support frame.

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