JPH02159264A - Operation safety apparatus of boom in x-ray imaging apparatus - Google Patents

Abstract

PURPOSE:To prevent an accident at the time of the cutting of a wire by constituting a safety apparatus of the operation member fixed to the leading end part of the wire, an energizing means for energizing the operation member downwardly and an operation detection means for detecting that the operation member is moved downwardly. CONSTITUTION:A safety apparatus 60 consists of the operation members 61 fixed to the leading end parts of wires 52, 56, photosensors 62 detecting the operation of the operation members 61 and springs 65 energizing the operation members 61 downwardly. When the wire 52 or 56 is cut, the operation member 61 connected to the cut wire is rapidly moved downwardly by the spring 65 and a shield member 68 is also moved downwardly and the light from a light emitting part is received by a light detection part. The photosensor 62 detects that the wire is cut to output a detection signal to a control apparatus. In the control apparatus, a stop signal is outputted to each winch 50 to stop the winch 50 and the extending/contracting operation of the boom 16 is stopped. The boom 16 is held at the stop position by the non-cut wire and the accident due to the cutting of the wires 52, 56 is prevented.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an operation safety device for a boom equipped with an X-ray tube or an X-ray processing section at the tip of an X-ray imaging apparatus.
In particular, it is used as an X-ray imaging device to examine the health condition of animals such as racehorses.

(Prior Art) Conventionally, in this type of X-ray imaging apparatus, a cart is disposed on the ceiling so as to be movable on a horizontal plane, and an X-ray tube or an An X-ray tube or an X-ray processing section has been provided which is arranged in a suspended manner and is configured to be movable three-dimensionally by the movement of a cart and the extension and contraction of a multi-stage boom. By the way, for example, a winch for driving the multi-stage boom extension and retraction is provided on the truck, and the tip of the wire wound around this winch is fixed to the tip of the multi-stage boom, and the winch drives the rewire. The multi-stage boom is extended and contracted by hoisting it up to the side or letting it out from the winch side.

(Problem B to be solved by the invention) However, in the above-mentioned conventional multi-stage boom configuration, if the wire is cut, the tip of the multi-stage boom will drop all at once, resulting in injury to the object to be inspected, such as a racehorse. There is a problem in that the X-ray tube and the X-ray processing section provided at the tip of the multi-stage boom are damaged.Therefore, there has been a need for a safety device that can prevent such accidents when cutting the wire.

(Means for Solving the Problems) The boom operation safety device in the X-ray imaging apparatus of the present invention includes a boom operation safety device in which a trolley is provided so as to be freely transportable by a transport means provided on the ceiling.
A telescopic boom is provided at the bottom of the cart, an X-ray tube or an X-ray processing unit is provided at the tip of the boom, a winch is provided on the cart, and a In an X-ray imaging apparatus, the tip portions of the wire are fixed at appropriate positions on the boom, and the boom is extended and retracted by driving a drive source connected to the winch via a power transmission device, wherein the tip portion of the wire The safety device interposed in the boom includes an actuating member fixed to the tip of the wire and supported movably in the vertical direction by a support member provided on the boom, and an actuating member interposed between the actuating member and the support member. The actuating member is equipped with an urging means for urging the actuating member downward, and an actuation detecting means for detecting that the actuating member has moved downward.

(Function) When the wire is cut, the actuating member fixed to the wire quickly moves downward due to the biasing force of the spring.
This movement is detected by the operation detection means. As a result, the drive of each winch is stopped, and the boom extension and contraction operation is stopped.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In this example, an X-ray imaging apparatus for inspecting the health condition of racehorses will be explained.

FIG. 3 shows a schematic configuration of the entire X-ray imaging apparatus.

The X-ray imaging apparatus is the same as the first unit A which is disposed on the ceiling and has a first X-ray tube 11 (the third unit C is disposed on the ceiling and has an X-ray processing section 31, and the third unit C is disposed on the floor). 2nd X
and a second unit B having a wire tube 21.

The first unit A has a pair of guide rails 12 laid across the ceiling in an appropriate direction, is arranged below the guide rails 12 in a direction perpendicular to the guide rails 12, and is moved along the guide rails 12. A pair of movable guide rails 13, a truck 15 movably disposed along the guide rails 13, a boom 16 provided at the bottom of the truck 15 and extendable in the vertical direction, and a boom 16 provided at the tip of the boom 16. It is composed of a first X-ray tube 11.

The guide rail 13 is movable along the guide rail 12 by an appropriate drive device such as a motor. Further, the trolley 15 is movable along the guide rail 13 by an appropriate drive device such as a motor.

The boom 16 is, for example, a conventionally known multi-stage boom, and is extendable and retractable by an appropriate drive device. A holding part 17 is provided at the tip of the boom 16, and the first X-ray tube is held in the holding part 17 so as to be rotatable in the horizontal direction and the vertical direction. First X-ray tube 11
is for irradiating the object to be inspected with XvA, and is configured to be movable three-dimensionally by the movement of the guide rail 13 and the trolley 15 and the extension and contraction movement of the boom 16.

The second unit B includes a pair of guide rails 22 laid in a recess formed in a part of the floor in the same direction as the guide rails 12 on the ceiling, and a pair of guide rails 22 placed above the guide rails 22 orthogonal to the guide rails 22. a guide rail 23 that is disposed in a direction (same direction as the guide rail 13 on the ceiling) and is movable along the guide rail 22;
The device guide rail 23, which is composed of a cart 25 movably arranged along the dolly 25 and a second X-ray tube 21 provided on the upper surface of the cart 25, is moved along the guide rail 22 by a driving means such as a motor. It is done freely. Further, the trolley 25 is driven by the guide rail 23 by a driving means such as a motor.
It is made to be able to move freely along. A second X-ray tube holder 26 is placed on the cart 25, and the second X-ray tube 21 is held in the second X-ray tube holder 26 so as to be rotatable around the X-axis and the Y-axis. This second Xm tube 21 is rotatable by a drive device such as a motor.

The third unit C includes a pair of guide rails 32 laid on the ceiling in the same direction as the guide rails 12, and a direction perpendicular to the guide rails 32 below the guide rails 32 (in the same direction as the guide rails 3). ) and is movable along the guide rail 32; and a cart 3 is disposed movably along the guide rail 33.
5, a boom 36 provided at the bottom of the trolley 35 and extendable in the vertical direction, and an X-ray processing section 31 provided at the tip of the boom 36.

X-axis guide rail 32, Y-axis guide rail 33, trolley 3
5, and the boom 36 are constructed similarly to those of the first unit A.

A holding part 37 is provided at the tip of the boom 36 so as to be rotatable in the horizontal direction, and the X-ray processing part 31 is held in the holding part 37 so as to be rotatable in the vertical and horizontal directions. A cassette film for X-ray photography is stored in and out of the X-ray processing section 31, and the film receives the X-rays emitted from the first X-ray tube 11 and the second X-ray tube 21. The film is exposed.

The X-ray imaging apparatus configured in this manner includes the first X-ray tube 11
Alternatively, after arranging the second X-ray tube 21 at an appropriate position and arranging the X-ray processing unit 31 at a position facing the first X-ray tube 11 or the second XW tube 21 via the object to be inspected, 11 or the second X-ray tube 21. After the irradiated X-rays pass through the X-ray inspection object,
X-ray photography is performed by exposing the film in the XvA processing section 3°1 to the radiation processing section.

1 and 2 show the configuration of a boom operation safety device in an X-ray imaging apparatus. This operating safety device is provided on each boom 16.36, and only boom 16 will be described here.

A winch 50 is provided on the truck 15, and the tip of a wire 52 wound around a drum portion 51 of the winch 50 and the tip 16a of the boom 16 are connected via a safety device 60. Furthermore, a balancer 55 is provided on the trolley 15, and the tip of the wire 56 fed out from the balancer 55 and the tip 16 of the boom 16
a are connected via a safety device 60. The balancer 55 is provided to reduce the burden on the winch 50 when the boom 16 is retracted by winding the wire 52 around the extended boom 16.

That is, as the boom 16 extends and the wire 56 is unwound from the balancer 55 by an amount, the force used to unwind the wire 56 also increases.

Two of these winches 50 and two balancers 55 are each provided on the truck 15 for safety reasons, and the boom 16 is connected to the boom 16 by four wires 52 and 56 that are wound around the drum portion 51 of each winch 50 and suspended. This means that the tip is suspended.

As shown in FIG. 1, the safety device 60 includes an actuation member 61 fixed to the tip of the wire 52 (and the wire 56), and a photosensor (operation detection means) 62 that detects the operation of the actuation member 61. and a spring (biasing means) 6 that is interposed between the operating member 61 and a support member 63 provided at the upper part of the tip 16a of the boom 16 and urges the operating member 61 downward.
It consists of 5.

The actuating member 61 is formed into an inverted T shape when viewed from the side, and is slidably fitted into the support member 63. and,
The wire 52 is fixed to the upper end of the vertical portion 61a of the actuating member 61 via a connecting member 66. The operating member 61 suspends the tip 16a of the boom 16 by having both ends of its horizontal portion 61b abut against contact portions 64 formed at the lower portion of the support member 63.

An appropriate gap 67 is provided below the horizontal portion 61a of the actuating member 61.
is provided, and when the wire 52 suspending the tip 16a of the boom 16 is cut, the actuating member 61 is allowed to move downward due to the biasing force of the spring 65.

The photosensor 62 is provided near the support member 61.

This photosensor 62 detects that the actuating member 61 has moved downward, that is, that the wire 52 has been cut. Specifically, during normal operation, a shielding member 68 provided on the actuating member 61 is provided between the light emitting part and the light receiving part in the photosensor 62.
When the operating member 61 operates downward, that is, when the wire 52 is cut, the interrupting member 6
It is configured such that the light receiving section receives the light from the light emitting section after being blocked by the sun.

Next, the operation of the safety device 60 will be explained.

First, when the wires 52 and 56 are normal, both ends of the horizontal portions 61b of each actuating member 61 are connected to the abutting portion 64 of each support member 63 and the tip of the boom 16. Due to its own weight, it contacts against the urging force of the spring 65,
This suspends the tip 16a of the boom 16. At this time, a blocking member 68 connected to the actuating member 61 is placed between the light emitting part and the light receiving part of the photosensor 62 to block the light emitted from the light emitting part.

Then, any one wire 52 (or wire 5
6) is broken, the actuating member 61 connected to the broken wire 52 quickly moves downward due to the biasing force of the spring 65, and accordingly the blocking member 68 also moves downward, causing the light emitting section to close. The light is received by the light receiving section. As a result, the photosensor 62 detects that the wire 52 has been cut, and outputs this detection signal to a control device (not shown).

Based on this, the control device outputs a stop signal to each winch 50, and when the winch 50 is stopped by this stop signal, the extension and contraction operation of the boom 16 is stopped.

At this time, the boom 16 will be held in this stop position by the other unbroken wire 52.

In this manner, each winch 50 is stopped when even one of the safety devices 60 is activated, so that accidents caused by cutting the wires 52 and 56 can be prevented reliably.

Further, in the event that the wire 52 is cut, the boom 16 may be locked by simply inspecting it.

Note that the actuation detection means is not limited to the photosensor 62 of this example, and may be any other device that can detect that the actuation member 61 has moved downward, such as a limit switch.

(Effects of the Invention) As described above, according to the present invention, accidents caused by wire cutting can be prevented reliably, and a highly safe X-ray imaging apparatus can be provided.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the configuration of a boom operation safety device in an X-ray imaging device according to the present invention, FIG. 2 is an enlarged side view of the same, and FIG. 3 is a perspective view showing the overall configuration of the X-ray imaging device. be. 11... X-ray tube 15.25... Cart 16.26... Boom 31... X-ray processing section 50... Winch 51... Drum section 52.56... Wire 60... - Safety device 61... Actuation member 62... Photo sensor (operation detection means) 63... Support member 65... Spring (biasing means)

Claims (1)

[Scope of Claims] 1) A cart is provided so as to be freely transportable by a transfer means provided on the ceiling, a telescopic boom is provided at the bottom of the cart, and an X-ray tube or an X-ray processing unit is provided at the tip of the boom. , the truck is provided with a winch, the tips of wires wound around the drum of the winch are fixed to appropriate positions on the boom, and a drive source connected to the winch via a power transmission device is connected to the boom. In an X-ray imaging apparatus configured to extend and retract a boom by driving, a safety device interposed between the tip of the wire and the boom is fixed to the tip of the wire and attached to a support member provided on the boom. an actuating member supported to be movable in the vertical direction; a biasing means interposed between the actuating member and the supporting member to urge the actuating member downward; and an actuation detector for detecting that the actuating member has moved downward. 1. A boom operation safety device in an X-ray imaging apparatus, comprising: means.