JPH0247599Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] This invention relates to a mobile X-ray device, and more specifically to a mobile It concerns line equipment.

[Background of the idea]

The braking mechanism of a mobile X-ray device is a mechanical brake, such as an internal expansion type installed on the drive wheel, connected to the operating handle via a link mechanism, and operates only when force is applied to the operating handle by hand. It usually consists of a so-called deadman type brake. When the vehicle is running, the operator can release the brakes by pushing the handlebars, and when braking, the operator can release the brakes by taking his hands off the handlebars. However, the operator must keep pushing the steering wheel while driving, and must do this while driving from the rear of the X-ray machine with poor visibility, which requires considerable effort. .

[Purpose of invention]

The present invention provides an improved mobile X-ray device that can perform braking operations with minimal effort and can run in a semi-braked state when going downhill.

[Summary of the idea]

This mobile X-ray device consists of an electric motor, drive wheels, and an electric motor supported on a trolley equipped with an X-ray tube, an X-ray tube supporter, an X-ray generator that generates X-rays in the X-ray tube, etc. Therefore, the vehicle includes a traveling mechanism including a transmission unit disposed between the wheels to rotate the wheels, and a braking mechanism to prevent rotation of the wheels.

In the mobile X-ray device of the present invention, the braking mechanism includes a member fixed to the trolley, a floating member that moves on a rotating shaft located between wheels, an electric motor, or the like, and surfaces of each member that face each other. a friction plate provided on the fixed member, a spring on the fixed member loaded on the floating member to press the free member to the fixed member, and a spring provided on the fixed member to separate the free member from the fixed member against the spring. The movable member is moved by the excitation of the electromagnetic coil to separate the two members.
That is, the above configuration provides a non-excitation operated electromagnetic brake. Furthermore, it includes a pin held by the fixed member and a cam plate on the fixed member that moves the pin so that the floating member can be manually released from the fixed member, and movement of the pin causes the floating member to be released from the fixed member. It is designed so that it can be crimped or separated as desired.

According to the invention, the braking mechanism can be released by operating a switch located between the electromagnetic coil and the storage battery on the trolley that supplies current to the power source, e.g. the X-ray tube, By doing so, the brake can be released with an extremely small operating force, and the labor burden on the operator can be significantly reduced. Furthermore, even if a problem occurs with the electromagnetic coil, the brake can be applied and released, so that even if a problem occurs while the vehicle is running, the vehicle can continue to run safely. Furthermore, the release of braking by the electromagnetic coil can be interrupted at will, and the braking force can be controlled by the amount of movement of the pin, so even when semi-braking is required, such as when driving on a slope, it is smooth and easy. It can be run on.

Examples of the mobile X-ray device of the present invention are as follows:
This will be explained with reference to the attached drawings.

[Example of idea]

Fig. 1 shows the traveling mechanism of this mobile X-ray device, where 1 is an electric motor, 2 is a transmission unit including a differential gear, and 3 is a drive wheel.The rotation of the drive wheel 3 is caused by the electric motor. This is done by transmitting the rotation of 1 to the axle of the drive wheel via the transmission unit 2.

The braking mechanism 4 is built into the traveling mechanism, and prevents the rotation of the output shaft of the electric motor 4 to prevent the driving wheels 3 from rotating.
I am trying to stop the rotation of. The braking mechanism itself consists of fixing members 11 and 12, as shown in FIG.
and floating members 13a and 13b.

The fixing member 11 is disc-shaped with a center hole,
It is loosely connected to the output shaft 14 of the electric motor 1 and bolted to the casing 15 of the transmission unit 2. The other fixing member 12 has a hollow cylindrical shape and is fixed to the fixing member 11 with a bolt 16 with a gap formed therebetween.

The floating members 13a and 13b are also disc-shaped and are arranged in the gap between the fixed members 11 and 12. The floating member 13a is spline-coupled to the output shaft 14 of the electric motor, and is in contact with the fixed member 11 or You can distance yourself from this. Also,
The floating member 13b is positioned and guided by the bolt 16. Friction plates 17 and 18 are fixed member 1
1 and the floating member 13b, respectively, on mutually facing surfaces thereof.

A coil spring 19 is held in a groove around the central hole in the fixed member 12 and is attached to the floating member 1.
3b is moved toward the fixed member 11, and the friction plates 17 and 18 are constantly pressed together via the floating member 13a. The electromagnetic coil 20 is housed in a ring-shaped space formed in the fixing member 12, and forms an electromagnet together with the fixing member 12. By exciting the electromagnet 20, the floating member 13b can be moved away from the floating member 13a against the coil spring 19, and by stopping the action of the electromagnet, the floating member 1 can be moved away from the floating member 13a by the coil spring 19.
3a can be crimped onto the fixing member 11 via the friction plates 17 and 18.

In this braking mechanism, the movable member 13b can be pressed against and separated from the fixed member 11 not only electrically or electromagnetically, but also mechanically. The means for this purpose are the cam plate 21 and the pin 22. Pin 22 is
It is loosely inserted into a through hole provided near the outer peripheral surface of the fixing member 12. The cam plate 21 is ring-shaped and is loosely engaged with the circular protrusion 23 of the fixing member 12. As shown in FIG. 3, the cam plate 21 is provided with a long groove 24 located on a circle centered on its rotation center axis. A portion of these long grooves protrudes from the surface of the cam plate 21, as shown in FIG. Further, the pin 22 is slidably fitted in the through hole provided in the fixed member 12 through each long groove of the cam plate 21 in the axial direction,
The tip is screwed into the floating member 13b. When the cam plate 21 is rotated and the pin 22 is positioned in the protruding part of the groove 24, the pin 22 is moved against the coil spring 19.
Pull the floating member 13b against the
b is separated from the fixed member 11 and the floating member 13a, and when the cam plate 21 is reversed, the pin 22 pushes the floating member 13b, and the floating member 13a is pressed against the fixed member 11 via the friction plates 17 and 18. It will be done. The cam plate 21 always has the pin 22 positioned in the groove 24 in a non-protruding portion by a coil spring 26 connected between the arm 25 fixed to the cam plate 21 and the fixing member 12.

As shown in Figure 5, this traveling device includes an X-ray tube, a supporter for the X-ray tube, an X-ray generator that generates X-rays in the X-ray tube, and supplies current to the X-ray tube and the X-ray generator. The steering wheel 3 is attached to a truck 31 on which a storage battery is installed, and the steering wheel 3 is also attached to the truck 31.
2 and a cart 31 are supported on the floor or the like. For installation, the axle bearing 27 shown in FIG.
The arm 25 on the cam plate 21 of the braking mechanism is connected by a cable 33 to a lever 34 on the truck.
The lever 34 is arranged near a handrail 35 on the truck 31 on which an operator places his hand, and has a shaft 36 rotatably held by the truck 31. Electric motor 1 that rotates drive wheel 3 and electromagnetic coil 20 of braking mechanism 4
Current is supplied to the storage battery 31 by a storage battery mounted on the truck 31, and control is performed by operating a switch located between these batteries. A brake switch for the electromagnetic coil is designated by the reference numeral 37 in FIG. 5 and is mounted, for example, on a handrail 35.

The mobile X-ray apparatus is moved by an electric motor 1 rotating drive wheels 3 via a transmission unit 2. To start running, the operator can grasp the switch 37 together with the handrail 35, and to brake during running, by releasing the switch 37. That is, when the switch 37 is pressed, current is supplied to the electromagnetic coil 20, the floating member 13 is pulled away from the fixed member 11 against the coil spring 19, and the electric motor 1 becomes free, and the trolley 3
1 can be run. Also, switch 3
By removing your finger from 7, the power supply to the electromagnetic coil 20 is cut off, and the floating member 13 moves to the coil spring 1.
9 is crimped to the fixing member 11 to prevent rotation of the output shaft 14 of the electric motor 1, thereby stopping the traveling of the truck 31.

Furthermore, in this mobile X-ray device, braking and releasing can also be done by moving the lever 34. In other words, when the operator presses the handrail 35
By extending your finger and pulling the lever 34, the cable 33 and the cam plate 21 are rotated, and the pin 22 separates the floating member 13 from the fixed member 11, allowing the trolley 31 to travel, and the lever 34 By loosening the cam plate 21, the cam plate 21 rotates in the reverse direction, and the floating member 13 is pressed against the fixed member 11, so that the traveling of the truck 31 can be stopped. Since braking is done mechanically in this way, and the magnitude of the braking force can be changed by changing the force with which the lever 34 is pulled, even if a problem occurs in the braking system using the electromagnetic coil, it will not occur during driving, for example. even when driving safely and reliably,
It is also possible to travel on slopes easily and safely. The latter will be explained in detail.

If only the braking is done by the electromagnetic coil, the braking will be instantaneous when descending a slope where the inertia increases, making the vehicle unstable and difficult to drive.
The shock generated by sudden braking will have an adverse effect on the X-ray tube and the like. However, in the mobile X-ray device according to the present invention, the operator can mechanically brake and release the brake by rotating the lever 34, and the magnitude of the braking force can be changed. For example, by keeping the vehicle in a semi-braked state, it is possible to run smoothly and easily on a slope. Even if something that impedes driving suddenly appears while descending a slope, sudden braking can be performed by releasing the lever 34 or by pulling the lever 34 further. It is extremely safe.

[Effect of idea]

As mentioned above, the mobile X-ray device of the present invention is not only capable of electrically releasing the brakes during normal driving, so that driving can be performed without causing physical pain to the operator. Since braking can also be achieved manually, the vehicle can be driven safely even if trouble occurs with the braking by the electromagnetic coil, and it is also possible to easily travel on slopes.

[Brief explanation of the drawing]

The drawings show an embodiment of the mobile X-ray device of the present invention, and FIG. 1 is a plan view of its traveling device, and FIG.
The figure is an enlarged sectional view of the braking mechanism taken along the line in Figure 1, Figure 3 is a side view of the cam plate of the brake mechanism taken along the line in Figure 2, and Figure 4 is a side view of the cam plate taken along the line in Figure 3. FIG. 5 is an enlarged cross-sectional view of the cam groove and a perspective view showing a state in which the braking mechanism is assembled into the truck. DESCRIPTION OF SYMBOLS 1... Electric motor, 2... Transmission mechanism, 3... Driving wheel, 4... Braking mechanism, 11, 12... Fixed member,
13...Floating member, 17, 18...Friction plate, 19
... Spring, 20 ... Electromagnetic coil, 21 ... Pin,
22...Cam plate, 31...Dolly.

Claims (1)

[Scope of utility model registration request] An electric motor supported on a cart equipped with an X-ray tube, an X-ray tube supporter, an X-ray generator that generates X-rays in the X-ray tube, etc., a drive wheel, and a motor to rotate the wheels. It consists of a traveling mechanism including a transmission unit disposed between these, and a braking mechanism that prevents rotation of the wheels. a plurality of floating members that move on the floating member; a friction plate provided on mutually facing surfaces of one of the fixed member and the floating member; and a fixed member that is loaded on the floating member to press the floating member against the fixed member. A non-excited electromagnetic brake consisting of a spring on a member and an electromagnetic coil provided on the fixed member to separate the floating member from the fixed member against the spring; A mobile X-ray device comprising: a pin guided by a fixed member; and a cam plate provided on the fixed member for moving the pin.