Shimadzu Corporation

Toshio Kadowaki

Hajime Takemoto

Toshiaki Nakamura

Shojiro Yamaguchi

Masahiro Kawano

Kimihiro Takahama

Goroh Hirata

Tatsuya Araki

Koji Akutsu

A mobile X-ray apparatus for a circuit examination, which includes an X-ray tube with a collimator, a mobile base having a pair of driven wheels, a holder attached and movable to the base, the holder holds the X-ray tube. A motor driver is disposed in the base which drives the wheels. An operation handle bar is disposed in the base providing a signal for driving the motor driver. An input means, separated from the handle bar, provides a signal for driving the motor driver slightly. A controller controls the motor driver according to the signal from the handle bar or the input means.

Mobile X-ray apparatus

In a mobile type X-ray apparatus, an input shaft of a cyclo-decelerator is connected to one end of a rotational shaft of a motor, and the other end of the rotational shaft is connected to an encoder and an electromagnetic brake. The cyclo-decelerator is attached to a frame. Also, a bearing is fitted in the frame, and a wheel hub is fitted between the bearing and a motor output shaft. A wheel is fixed to the wheel hub. By the cyclo-decelerating mechanism, a transmission of power is carried out among contact surfaces of an eccentric cam, epitrochoid teeth and rollers, so that the apparatus has a compact structure with a low noise and no backlash.

Mobile type X-ray apparatus

In a cassette tray for radiography, a positioning plate is provided on a rear surface of a tray, and the positioning plate includes grooves corresponding to cassette sizes. A stopper for holding a cassette has a spring, and engaging pieces which engage the groove and formed at a lower end of a slider moving vertically between a front plate of the tray and the positioning plate. When the engaging pieces of the stopper engage the grooves, the stopper projects from the front surface of the tray to hold the cassette at the position. When the engaging pieces of the stopper do not engage the grooves, the stopper is located on the same plane as the front plate surface of the tray. If the stopper is pressed and moved along the surface of the tray, the position for the cassette to be used can be selected. Accordingly, the cassette tray can securely hold various-sized cassettes, and the attaching operation therefor can be carried out easily in a short period of time.

Cassette tray for radiography

A mobile device for an X-ray apparatus is formed of a freely rotatable hollow column disposed on a mobile base, a holding section for holding an X-ray tube in a vertical direction along the column, and a counter weight connected through a wire to the holding section to be suspended inside the column. A column rotating section formed of a bearing portion and a rotational shaft with a hollow part is disposed in the mobile base. A lower part of the counter weight is provided with a convex portion which enters into the hollow part of the rotational shaft. When the holding section for the X-ray tube is elevated to the highest point, the counter weight is lowered to the lowest point, wherein the convex portion of the counter weight enters into the hollow part of the rotational shaft. Thus, a volume of the hollow part can be utilized as a part of the volume of the counter weight to allow the counter weight to be made of iron and the like, other than lead.

Mobile device for X-ray apparatus

A mobile medical X-ray apparatus has the entire weight of its X-ray source and X-ray detector as well as their supporting arm supported by a vertically movable support column on a mobile table. A lever and a member for supporting a normally compressed spring are attached to the table rotatably, and they are also connected to each other rotatably with respect to each other around a connector shaft such that the force of the spring tends to rotate the lever in the direction of causing the support column to move upward. The spring constant of the spring and the relative positions of the lever and the spring-supporting member are determined such that the support column can be moved manually upward or downward.

Mobile medical X-ray apparatus

A radiographic apparatus includes a C-shaped arm for supporting an X-ray tube at one end thereof and an image receiving unit at the other end, and an arm holder for slidably supporting the C-shaped arm for rotation about a center of an arc thereof. The arm holder has a hollow shaft supported therein to extend substantially parallel to an axis of the center of the arc, and a take-up drum supported on the hollow shaft. A drum drive device is operable in response to rotation of the C-shaped arm to rotate the take-up drum. A plurality of cables are connected to the X-ray tube and the image receiving unit, respectively. The cables are gathered into a bundle adjacent the X-ray tube or the image receiving unit, the bundle being guided by an outer periphery of the C-shaped arm to be wound on the take-up drum. The bundle further extends through the take-up drum and the hollow shaft into and then out of the hollow shaft.

Radiographic apparatus having a C-shaped arm for supporting an x-ray

A mobile X-ray apparatus having a carriage driven in a direction in which forces are applied to a pair of right and left control bars operable without influencing each other. The right and left control bars are arranged symmetrically with respect to the direction of movement of the carriage. Each control bar is supported to be pivotable independently of the other in a substantially horizontal or vertical plane. A neutralizing mechanism is provided for maintaining each control bar in a neutral position when the control bar is free from an external force. Position detectors are disposed adjacent a forward position and a rearward position of each control bar, respectively, to detect displacement thereof. Each control bar has an equivalent capacitor structure having an electrostatic capacity variable when the operator grips the control bar. This structure provides a safety mechanism for allowing the carriage to move only when the operator grips the control bar.

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Kyoto, Japan

Toshio Kadowaki