JPS5910639Y2 - Source container equipped with a dual-operated shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radiation source container equipped with a shirt lid, and more particularly to a radiation source container equipped with a shirt lid with a dual operation mechanism.

As shown in Figure 1, a radiation source container with a shield used in a radiation thickness meter using a radiation source such as cesium has a radiation source container 1
The rotary solenoid 3 rotates the rotary shutter 2 by 90 degrees to allow the radiation emitted from the radiation source 4 stored in the radiation source 4 to flow out by connecting the radiation passing hole 6 of the radiation source to the hole 5 containing the radiation source. As shown in the figure, a hole 6 through which radiation passes is made perpendicular to the hole 5 to block it.

Some also have a handle H so that the shirt can be opened and closed manually.

If the shirt flap opens and closes only electrically, it will not be possible to close the shirt flap to prevent radiation from being emitted in the event of a power outage or failure of the rotary solenoid while the shirt flap is open. However, operating near the radiation source was extremely dangerous as there was a risk of exposure.

An object of the present invention is to provide a radiation source container that eliminates the drawbacks of the conventional radiation source containers as described above.

An embodiment of the present invention will be described below with reference to the drawings.

Figures 2 to 4 all show one embodiment of a radiation source container equipped with a shirt shirt with a dual operation mechanism according to the present invention.
The figure is a front view showing a cross section of the container, FIG. 3 is a side view taken in the direction of arrow A in FIG. 2, and FIG. 4 is a schematic diagram showing the case where the container is attached to a radiation thickness meter.

In the figure, a bottomed hole 5 for storing a radiation source 4 is provided inside a radiation source container 1, and a rotary shutter 2 is supported by the radiation source container 1 with its supporting shafts 2a and 2b on both sides. It is rotatably provided.

Further, the rotary shirt shutter 2 is provided with a hole 6 that is concentric with the bottomed hole 5 and that allows radiation to pass therethrough.

A support shaft 2a of the rotary shutter is connected to an electric drive source 3 such as a rotary solenoid or an electric motor via a coupling 7 outside the container.

Further, an arm 8 having a retaining pin 9 is attached to the outer end of the container of the spindle 2b of the rotary shutter. At this time, the arm 8 is fixed at an angle of 45 degrees counterclockwise with respect to the vertical line, as shown in FIG.

Below the arm 8, an operating rod 10 having a lever 11 that engages with the engagement pin 9 of the arm 8 is supported by a support fitting provided outside the radiation source container 1 so as to be slidable in the axial direction.

The other end of a spring 12, one end of which is fixed to the container, is connected to the right end of the operating rod 10 in the drawing, and applies a tensile force to the operating rod 10 in the right direction in the drawing.

Furthermore, when the arm 8 is rotated 90 degrees clockwise by sliding the operating rod 10 to the left in the drawing and being pushed by the lever 11, that is, when the rotary shutter 2 is closed, the position occupied by the lower end of the lever 11 is The limit switch 13 is attached to the container via the support plate 14 so that its position can be adjusted so as to be activated by this.

An operating lever 16 is provided on the operating rod 10 and separated from the radiation source container 1 via a connecting fitting 15 for remotely and manually closing the rotary shutter 2 .

In FIG. 4, which shows the case where the radiation source container of the present invention is attached to a radiation thickness meter, the detector 22 and the radiation source container 1 are attached to the detection unit cart 21 with the object to be measured 23 sandwiched therebetween.

An operating lever 16 for manual operation is provided on the detection unit cart 21 at a position spaced apart from the radiation source container, and is connected to the operating rod 10 with a connecting fitting 15.

The operating lever 16 is lockable at positions E and M shown in the figure, and at position E it is "electrically operated".
, M positions are each provided with a "manual close" display.

When the operating lever 16 is in position E, lever 1
1 moves to the right in FIG. 3 and occupies a position P away from the engagement pin 9 of the arm 8, and when it is in the position M,
Move the lever 11 to the left and rotate the arm 8 clockwise 90
Adjust the connecting fitting 15 and the operating lever 16 so that they occupy the rotated position S (indicated by the two-dot chain line in FIG. 3).

In addition, at the M position, the drive power of the rotary shutter is cut off by the contact signal of the limit switch 13, and the "manual closing" is performed.
An electric circuit equipped with a power outage compensation power supply is provided to display the information.

Next, the functions and effects of the embodiment configured as described above will be explained.

First, under normal conditions, the operating lever 16 is placed in position E.

Then, the operating rod 10 is pulled by the spring 12 and moves to the right, and the lever 11 occupies a position P away from the arm 8.

The rotary shirt shutter 2 is opened and closed electrically.

At this time, the arm 8 rotates, but since the lever 11 is at the distant position P, they do not interfere with each other.

Power outage or electric drive source 3 occurs while rotary shutter 2 is open.
If the operating lever 16 is pulled to the M position, the operating rod 10 will move to the left in the figure via the connecting fitting 15, and the lever 11 fixed to the operating rod will be released from the engagement of the arm 8. While pressing the dowel pin 9, rotate the arm 8 90 degrees clockwise to move to the S position.

This action causes the rotary shutter 2 to rotate 90 degrees, and the hole 6 through which the radiation passes comes to be orthogonal to the bottomed hole 5 that houses the radiation source, completely blocking the radiation emitted from the radiation source 4. It becomes closed.

In addition, the limit switch 13 is also activated by the lever 11 at the same time, and its contact signal opens the power switch of the electric drive source via an electric circuit equipped with a power outage compensation power source, and remotely monitors the electrical display of "manual close". Place it on the board or other desired location.

Therefore, it is possible to completely prevent unexpected radiation exposure due to the rotary shirt starter opening when the power is restored, and damage to the device due to interference between the arm 8 and the lever 11. You can check.

When the failure or power outage of the electric drive source 3 is restored and the normal state is restored, the operating lever 16 is returned to the "electric" position E.

As a result, the operating rod 10 is moved to the right in the figure by the tensile force of the spring 12, and the lever 11 is also moved to the P position, so that the arm 8 becomes rotatable without interference.

At this point, the power switch of the electric drive source is closed, and normal operation is resumed in which the rotary shutter is opened and closed electrically.

As described in detail above, according to the radiation source container equipped with the dual-operation shutter of the present invention, the shutter can be closed remotely and manually in the event of an abnormality such as a malfunction of the shutter drive source or a power outage, so that radiation Radiation exposure is completely prevented.

Further, it is possible to confirm whether the shirt lid is closed by manual operation with a mechanical display at the operating lever, and it is also possible to remotely display that the shirt lid is in the "manual closed" state electrically by means of a limit switch.

Furthermore, the contact signal of the limit switch is used to cut off the power to the shutter drive source when it is set to "manual close," completely preventing the shutter from opening and closing electrically and from damaging the device in this state. can do.

Furthermore, when set to the "electric" state, the lever 11 for manual operation does not interfere with the shaft of the rotary shirt starter, so no load is applied to the rotation of the shirt starter, and no load is applied to the manual operation mechanism. There is no.

Note that the operation lever 16 is not limited to the embodiment described above, for example.
An electric remote display is attached to the "electric" position display, and the power switch of the shutter drive source, which is opened in conjunction with the "manual close" operation, is linked to the switching of the operating lever 16 to "electric". This can be implemented by, for example, causing the circuit to close.

In addition, it goes without saying that the radiation source container equipped with the shirt shirt with the dual operation mechanism of the present invention can be applied not only to radiation thickness gauges but also to devices that use radiation sources such as irradiation equipment.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional example of a radiation source container with a shirt shutter, and FIGS. 2 to 4 are views showing an example of a radiation source container equipped with a shirt lid with a dual operation mechanism according to the present invention. , FIG. 2 is a front view showing the container in cross section, FIG. 3 is a side view taken in the direction of arrow A in FIG. 2, and FIG. 4 is a schematic diagram showing the case where the container is attached to a radiation thickness meter. DESCRIPTION OF SYMBOLS 1... Radiation source container, 2... Rotating shutter, 3... Electric drive source, 4... Radiation source, 5... Bottomed hole, 6... Hole through which radiation passes, 8...・Arm, 10...Operating rod, 1
1...Lever, 13...Nomit switch, 15.
・Connection fittings, 16...Operation Leno〈ー

Claims (1)

[Scope of utility model registration request] a radiation source container having a bottomed hole for storing a radiation source therein; a rotary shutter that is pivotally supported within the radiation source container and has a hole through which radiation passes; and an electric drive source provided on the shaft of the rotary shirt shutter, one end of which is fixed to the other end outside the container of the shaft of the rotary shirt shirt, and an engagement pin is provided protruding from the other end extending in the radial direction, and rotates integrally with the shaft. a movable arm; a lever disposed at a position that allows the arm to be secured to its retaining pin over a rotational range from opening to closing of the rotary shirt; and a lever to which the lever is fixed and located outside the radiation source container; an operating rod that is supported substantially horizontally so as to be slidable in an axial direction and has a spring connected to one end thereof that applies a tensile force to move the lever to a position separated from the engaging pin force of the arm in the open state of the rotary shirt shutter; When the operating rod is moved by a lever fixed thereto by a stroke that rotates the arm to the closed position of the rotary shirt stopper, the control rod is provided in a position where it engages and operates the lever, and a contact signal thereof causes the rotary shirt stopper to be activated. a limit switch for shutting off the power to the electric drive source; and a limit switch provided at a position apart from the radiation source container and connected to the operation via a connecting fitting, and for manually moving an operation rod to place the rotary shutter in the closed state. A shirt collar with a dual operation mechanism is provided, comprising an operation lever capable of locking the arm and the lever in an engaged position and locking the arm and the lever in a separated position when the rotary shirt shirt is in an open state. Source container.