JPS61107698A - X-ray tube supporter - Google Patents

Abstract

PURPOSE:To improve the safety of an X-ray tube ramp by installing the second braking plate that is float-supported by a drop braking device of the X-ray tube ramp. CONSTITUTION:On a ramp 12 of an X-ray tube supporter that moves, while maintaining its balance, along a column 11 owing to a rope 16 linked to plural spring balancer equipped with springs, a freely revolvable braking plate 14 is installed with a supporting member at its center. When the rope 16 is cut away, the braking plate revolves through a spring 25 and, while tilting, bites into the column 11, thereby preventing the fall of the ramp 12. And the braking plate 14 float-supports the second braking plate 35, which bites into the column 11 in response to the slight rotating move of the braking plate 14 at the time when the rope 16 is not cut but some of the spring balancers are severed, and tension of the rope 16 changes somewhat, thereby preventing the fall of the ramp 12. Through such a second-stage braking arrangement, safety of the X-ray tube supporter can be further enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an X-ray tube support, and particularly to an X-ray tube support suitable for a mobile X-ray apparatus.

[Background of the invention]

In this type of X-ray tube support, a lifting platform for supporting the X-ray tube is attached to a column so as to be movable up and down, and is suspended by a rope, and the other end of the rope is balanced by a spring balancer. In order to prevent the X-ray tube from falling suddenly due to the breaking of the rope and the spring of the spring balancer, a braking plate is held on the lifting platform so that it can tilt around a fulcrum on the lifting platform, and the rope is braked around the fulcrum. It is connected to one end of the plate, and a spring pushes up the other end of the brake plate around the fulcrum, and as the rope tension decreases, the brake plate tilts, and the brake piece on the brake plate lifts the column. This is to create strong friction and prevent the platform from falling or descending rapidly. In such a case, the X-ray tube and the platform may fall a considerable distance before the platform stops, which may result in a serious accident.

[Purpose of the invention]

The present invention provides an X-ray tube support with improved safety.

[Summary of the invention]

In the X-ray tube support of the present invention, the spring balancer is equipped with a plurality of springs connected in parallel to the rope, and when the rope is cut, of course, some of the springs are cut, and the lifting platform is moved by the remaining springs. Even when supported, the brake plate and the second brake plate floatingly supported by the brake plate bite into the support column by tilting, thereby preventing the elevator platform from falling.

Embodiments of the X-ray tube support of the present invention will be described below with reference to the accompanying drawings.

[Embodiments of the invention]

In FIGS. 1 to 5, reference numeral 11 indicates a column arranged vertically, and reference numeral 12 indicates an elevator platform that supports both the X-ray tube and the collimator. The lifting platform is suspended from the support and can be moved along the support. Brake plate 14
is being played with on pillar 11.

It is connected to a fulcrum member 15 on the lifting table so as to be rotatable about the fulcrum member. The rope 16 is wound around a pulley at the upper end of the support column (not shown), and one and both ends are connected to the brake plate 14 and the spring balancer 17. A coil spring 25 is located between the brake plate and the elevator platform. The coil spring pushes up the side of the brake plate opposite to the connection side of the rope 16, with the fulcrum member 15 in the middle, so that the brake plate becomes perpendicular to the column.

When the rope tension changes, that is, when the rope breaks, the brake plate 14 is rotated clockwise by the spring 18 about the fulcrum member 15, and the brake plate bites into the column, -,!
Lifting platform. Fall or prevent, like,. , oh.
To explain in detail, the brake plate 14 has a through hole 21, and is attached to the support by allowing the through hole to play with the support. On the other hand, a receiving plate 22 is screwed to the lifting platform. The fulcrum member 15 is temporarily planted.

The brake plate has its groove 24 fitted into the fulcrum member 15, and is prevented from being pulled out upwardly by the head of the fulcrum member, while being able to move in the horizontal direction. A coil spring 25 is disposed at one end of the brake plate with the fulcrum member 15 in the middle, and between it and the lifting platform. These coil springs are inserted into pins on the platform to prevent them from tipping over and to keep them in place. The rope 16 is connected to the opposite side of the brake plate with the fulcrum member 15 in the middle. The connection is made by passing the rope through a hole in the brake plate and preventing withdrawal by a stop 26 at the end of the rope. The brake plate is positioned at right angles to the column by these,
The lobe can be tilted about the fulcrum member by changing the tension of the lobe. The screw member 27 is the coil spring 25
It is placed on a lifting platform on the side closer to the brake plate, allowing the amount of inclination of the brake plate to be adjusted.

When the tension of the rope 13 changes, for example when the rope itself breaks, the braking plate is moved by the coil spring 25 to the fulcrum member 1.
The brake piece 40a on the brake plate is tilted around 5.
, 40b can bite into the support column 12 to prevent the platform from falling. The lifting platform is stopped even if the spring in the spring balancer breaks. As mentioned above, the spring balancer is equipped with multiple springs connected in parallel to the rope, so that even if some of the springs break, the remaining springs can prevent the platform from descending suddenly. There is. The spring balancer includes a hollow loader 28. The rotor is housed in a case 29, and is attached to a shaft 30 inside the case with a bearing interposed therebetween. A spiral spring 31 is arranged parallel to the rotor and has one end attached to the shaft 30 and the other end attached to the member 3 to the rotor.
It is fixed by 2. The pulley 33 forms part of the rotor 28 and is provided with a helical rope groove. The rope 16 is wound around the rope groove of the pulley,
And the end is fixed to the pulley. The spring balancer creates a torque that is related to the diameter of the spiral spring and rope groove to balance the platform at each height. In addition,
The shaft 30 is rotatably held in the casing, and the worm 3
4a and the worm wheel 34b, and by rotating the worm, an initial deflection can be imparted to the spiral spring. In such a spring balancer, even if some of the spiral springs are cut off, the remaining spiral springs are working against the pulley, so the lifting platform 12 will not fall until the braking piece 40 bites into the support column 11. distance can be reduced.

In this X-ray tube supporter, even if some of the springs in the spring balancer break, the lifting platform can be prevented from moving up and down. In other words, even if some of the springs in the spring balancer are broken, the springs 25 that push up the brake plate 14 will not change the rope tension so much that the brake plate will not tilt to the extent that the brake piece can be fully seated in the column, and the platform will not tilt. Stopping may be incomplete or the time delay until stopping may become large. In order to prevent this, the second brake plate is attached to the brake plate 14 in a floating manner. The second brake plate is designated 35 in the drawings.

Like the brake plate 14, the brake plate 35 has a rectangular through hole 36, and by fitting a support into this hole, the brake plate 35 is fitted onto the support and placed on the brake plate 14. It is being The brake plate 35 is provided with a groove 37 parallel to the groove 24 of the brake plate 14, and the pin 38 passes through the groove 37 and connects to the brake plate 1.
4, so that the brake plate 35 can tilt on the brake plate 14 using the pin 38 as a fulcrum and can slide using the pin 38 as a guide. Brake piece 40g, 40
b is arranged on this second brake plate 35 so that its wedge-shaped side edges face each other across the pillar, and is clamped by the height adjustment plate 39 and the holding plate 39' and fixed with screws. has been done.

When the rope 16 is cut, the second brake plate 35 is tilted together with the brake plate 14, and the pa brake pieces 4° and 4°b are inserted into the seven pillars, thereby stopping the platform. Furthermore, even if some of the springs in the spring balancer break, for example, one of the three springs 31, the braking plate 35 will move around the pin 38 as a fulcrum with the slight tilting and impact of the braking plate 14 caused by this. The brake piece 40 is tilted and slides using the pin 38 as a guide.
a and 40b can be made to bite into the support column 11 to prevent the lifting platform from moving up and down.

The lifting platform itself has a pair of supports 41 and a cylinder. The support base is provided with a rectangular hole 41a, and is attached to the support column 11 by allowing the support support to pass through this hole. The cylinder 42 is also suspended in the column 11, and the support base is connected to this cylinder. Furthermore, four sets of rollers 43 are provided on the support base, corresponding to each side of the support column. Each roller is in contact with the side of the column to allow the platform to move up and down smoothly along the column and to prevent rotation of the platform about the column.

The axis of the roller is positioned in the horizontal direction by the side wall of the support and the wall of the notch (recess) of the support base 41 on the lifting platform facing it, and also by the presser plate 46 fixed to the support base 41 and the support base 4.
The vertical position is determined by the bottom of the first notch (recess). Cylinder 52 further.

It is fitted on the outside of the cylinder 42 and supported at both ends by the support base 41 with bearings 53 . The X-ray tube is adapted to be supported by this second cylinder.

FIG. 6 shows a mobile X-ray device equipped with this support. The pillar 11 is erected on a base 51.

The arm 54 is attached by a shaft 56 to a receiving plate 55 integral with the cylinder 52, and is balanced by a coil spring connected between the arm 54 and the cylinder 52.

The X-ray tube 57 and a collimator 58 are attached to the tip of the arm 54 with a rotary table 59 interposed therebetween. A capacitor type high voltage generator, a storage battery, etc. are installed on a base 51 together with a spring balancer and covered by a casing 60.

〔Effect of the invention〕

As described above, in the X-ray tube supporter of the present invention, the spring balancer has a plurality of springs connected in parallel to the rope for suspending the lifting platform, and even if the rope breaks,
Also, even if some of the springs are cut off and the remaining springs support the platform, one brake plate will be tilted due to changes in the tension of the rope, and the other brake plate will be floatingly supported by the other brake plate. The braking mechanism, which has two braking plates on which the braking pieces are suspended and supported in a floating manner, prevents the platform from falling, so safety is extremely high.

[Brief explanation of drawings]

The drawing shows an embodiment of the X-ray tube support of the present invention,
Figure 1 is a partially cutaway front view, Figure 2 is a side view,
Fig. 3 is a plan view, Fig. 4 is a sectional view taken along line IV--IV in Fig. 3, Fig. 5 is a sectional view taken along line V-■ in Fig. 2, and Fig. 6 is a sectional view taken along line IV-IV in Fig. 2. FIG. DESCRIPTION OF SYMBOLS 11... Strut, 12... Lifting platform, 14... Brake plate, 15... Fulcrum member, 16... Rope, 17...
Spring balancer, 25... Spring, 32... Spring balancer spring, 35... Second brake plate, 4
0...Second brake piece, 57...X-ray tube. Patent Applicant: Hitachi Medeico Co., Ltd. Patent Attorney Tadashi Akimoto Figure 3 Figure 6

Claims (1)

[Claims] 1. A vertical support, a lifting platform that supports the X-ray tube and is slidably attached to the support, a spring balancer, a rope connecting these in order to balance the lifting platform with the spring balancer, and a spring balancer. In order to prevent the platform from suddenly descending when the spring or the rope or both are cut, the platform has a braking mechanism disposed between the platform and the column, and the braking mechanism is loosely engaged with the column and prevents the platform from descending suddenly when the spring or the rope or both are cut. An actuating plate connected to a fulcrum member on the lifting platform so as to be tilted between a perpendicular position and an inclined position where it is inserted into the support, and between one end of the brake plate with the fulcrum member in the middle and the lifting platform. an elastic body arranged to tilt the brake plate to an inclined position, the rope being connected to the opposite side of the brake plate with the fulcrum member in the middle, and positioning the brake plate at a right angle. An X-ray tube support, characterized in that the spring balancer includes a plurality of springs connected in parallel to the rope, and the brake plate includes a second brake plate floatingly supported thereon. X-ray tube support.