JPH07145808A - Sealing device - Google Patents

Abstract

PURPOSE:To provide a sealing device which is difficult to duplicate and easy to automatically mount and demount with a robot or the like without using a power supply. CONSTITUTION:A cap seal 3 for which an aluminum plate with an impossible-to- duplicate design given to the surface is used has a protrusion 5 at the center. A special screw 2 is the one that a fitting portion 7 is provided on the head of an ordinary screw 6 and an engagement portion 8 is provided on the top of the fitting portion 7. Materials to be stored 12 are stored in a storage container 11, a cover is arranged, the storage container 11 and the cover 13 are fastened together with the special screw 2 and the special screw 2 is covered with the cap seal 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device used for sealing a lid of a container, an opening / closing part of a measuring instrument and the like.

[0002]

2. Description of the Related Art As is well known, the opening / closing portion of a power meter for measuring the amount of electric power used and the rear license plate mounting portion of an automobile are sealed by various sealing devices. This sealing device is designed to prevent unauthorized opening of the opening / closing part, mounting part, etc.
By deforming or destroying the sealing member of the device, it is possible to know an unauthorized opening after the fact.

Heretofore, as a sealing device of this type, a cap made of lead or a seal wire has been generally used as a sealing member, but in recent years, the reliability of sealing a storage container for a nuclear material or the like is high. An optical fiber cable is used as the obtained product. The sealing device using this optical fiber cable is to wind the optical fiber cable around the lid fixing part of the storage container and constantly send and receive optical signals with this cable, so that the signal is emitted when the cable is cut. The opening is detected and the opening is known. In addition, a sealing device using a multi-core optical fiber cable has also been proposed.This device removes the cable without cutting it, takes away stored items, or replaces it, and the cable is used as before. Even if it is wound around the lid fixing part, the cross section of the multi-core optical fiber cable is easily deformed, so it is detected that the container lid is opened by someone other than the administrator from the deformation of the cable cross section. Is.

[0004]

However, the above sealing device has the following problems. That is, a sealing member such as a lead cap or a seal wire can be easily duplicated, and the sealing member can be removed using a general tool and then the duplicated sealing member can be attached. On the other hand, when the optical fiber cable is used as the sealing device, a power source is always required to send and receive signals, and it is difficult for the robot or the like to automatically attach and detach the optical fiber cable.

The present invention has been made in view of the above circumstances, and provides a sealing device that is difficult to duplicate, does not require a power supply, and can be easily attached and detached automatically by a robot or the like. The purpose is to

[0006]

A sealing device according to claim 1, wherein the sealing device has a sealing member which is attached to an object to be sealed and which is deformed or destroyed when the object to be sealed is opened. It is characterized in that the sealing member is made of a member having a non-reproducible pattern whose appearance is visually recognizable.

According to a second aspect of the present invention, there is provided the sealing device according to the first aspect, wherein the sealing member is made of a metallic material, and the pattern is a pattern based on a property of the metallic material obtained by surface treatment. Characterize.

[0008]

According to the sealing device of the present invention, when the object to be sealed is opened, the member having a non-reproducible pattern which is visible on the outside is destroyed.

[0009]

EXAMPLES Examples of the sealing device of the present invention will be described below. First, an example of a method of applying a pattern that is difficult to copy to the components that form the sealing device will be described. As is well known, when anodizing the surface of high-purity aluminum, it melts,
The structure naturally generated in the molding process appears as a pattern. This pattern cannot be duplicated because the surface texture cannot be artificially processed during the generation process.

Although the above-mentioned anodizing is widely and generally performed, its specific procedure will be briefly described. A high-purity aluminum plate is first subjected to general cleaning and degreasing, and then emulsion degreasing. After that, a neutralization treatment is performed for 20 to 60 seconds at room temperature using a solution (nitric acid (1 + 3)) prepared by diluting 1 volume of nitric acid with 3 volumes of water. Then, using a solution prepared by mixing sodium gluconate 1% with caustic soda 23 ± 2%, the temperature is set to 75 ± 3 ° C. and etching is performed for 15 to 60 seconds. Then, use nitric acid (1 + 3) at room temperature for 30
Desmutting is performed for about 180 seconds, and then a stabilizing treatment is performed at room temperature for an appropriate time using a solution containing a chromic acid-based material and an additive in order to obtain an anticorrosive effect during the subsequent anodization. After the above pretreatment, anodization is performed. Sulfuric acid 15 ± 2 as a solution
%, 20 to 6 under the conditions of current density of 0.8 to 1.5 A / dm ² , bath voltage of 12 to 17 V and bath temperature of 20 to 23 ° C.
Process for 0 minutes. At this time, the aluminum content dissolved in the solution is 2
-8g / l. Then, using a solution of nickel acetate-based pore-sealing agent at 7 ± 1.5 g / l, the temperature was set to 85 ° C., the pore-sealing treatment was performed for 20 to 30 minutes, and finally hot air at 55 to 60 ° C. was used for 30 minutes or more. dry.

By the above treatment, the aluminum structure produced in the melting / forming step appears as a pattern on the plate surface and is fixed. As described above, it is impossible to duplicate this pattern, and the aluminum plate that has been subjected to the above treatment can be used as a material for a part having a pattern that cannot be duplicated.

Next, a first embodiment of the sealing device of the present invention will be described with reference to FIGS. The sealing device 1 shown in FIG. 1 includes a special screw 2 and a cap seal 3.

The manufacturing process of the cap seal 3 is shown in FIGS. In FIG. 2, reference numeral 4 denotes an aluminum plate (hereinafter abbreviated as an aluminum plate) whose surface is made non-reproducible by the above-mentioned method, and a protrusion 5 is attached to the center thereof. The protrusion 5 includes a truncated cone-shaped head portion 5a having a small tip diameter and a gradually increasing diameter, and a leg portion 5b having a small diameter for connecting the head portion 5a to the aluminum plate 4. The aluminum plate 4 has a thickness of, for example, about 0.8 mm, and the protrusions 5 are made of a relatively hard material such as steel. This aluminum plate 4 is pressed to produce a bottomed cylindrical cap seal 3 shown in FIGS. 3 and 4.

As shown in FIG. 5, the special screw 2 has a fitting portion 7 at the head of a normal screw 6, and an engaging portion 8 provided at the top of the fitting portion 7. Is.

An example of use of the sealing device 1 is shown in FIGS.
It will be described with reference to FIGS. First, a storage container 11 shown in FIG. 1 stores a substance 12 to be preserved (a precious metal such as jewelry, a dangerous substance such as a nuclear material, and the like) 12 and arranges a lid 13. Then, the lid 13 is fixed to the storage container 11 with the ordinary screw 6, and at this time, the special screw 2 is used at one or more places.

After fastening the screw 6 and the special screw 2, the special screw 2 is covered with the cap seal 3. The transition of the positional relationship between the protrusion 5 of the cap seal 3 and the engaging portion 8 and the fitting portion 7 of the special screw 2 at this time is shown in FIGS.
Shown in. As shown in FIG. 7, the head portion 5a of the protrusion 5 pressed against the engaging portion 8 (in the direction of arrow A) in FIG. 6 gradually expands the engaging portion 8 and finally the head portion 5a Fitting part 7
And the end portion of the head portion 5a is engaged with the engaging portion 8 to
The state becomes as shown in.

In this state, only the cap seal 3 can be rotated (direction of arrow B or C) without deforming or breaking the cap seal 3,
The cap seal 3 cannot be removed (arrow D direction), and the special screw 2 cannot be rotated (arrow C direction), that is, it cannot be removed. Therefore, special screw 2
By recording the pattern and shape of the cap seal 3 which is capped on the photograph, it is possible to verify when necessary and confirm that the seal has not been broken. The special screw 2 cannot be removed unless the authorized administrator himself deforms or destroys the cap seal 3, so that the cap seal 3 is disposable.

Next, a second embodiment of the sealing device of the present invention will be described with reference to FIGS. 9 and 10
As shown in FIG. 11, the sealing device 20 shown in FIG. 11 has an aluminum plate 21 having a non-reproducible pattern on its surface, a case 22 for mounting the aluminum plate 21, and a screw ( Seal bolt) 23 and head 2 of screw 23
Striker 2 placed in hole 24 drilled in 3a
5, a coil spring 26 that pushes up the striker 25, a leaf spring 27 that pushes up the screw 23, and a bottom support plate 28 that supports the coil spring 26 and the leaf spring 27.
And a C-shaped ring 29 that supports the bottom support plate 28.

The case 22 is a tubular member having an upper plate portion 22a, and the outer circumference of the tubular body portion 22b is hexagonal and the inner circumference is circular. In addition, the upper plate portion 22a has a crimp portion 30.
However, a groove 31 (see FIGS. 9 and 10) that fits with the outer periphery of the C-shaped ring 29 is provided on the inner surface near the lower end of the tubular portion 22b.

FIG. 12 shows the bottom surface of the case 22 (a view seen in the direction of arrow E in FIG. 11). Here, 41a and 41b are convex portions (convex downward in FIG. 11) provided on the lower surface of the upper plate portion 22a of the case 22, 42a and 42b.
Is a recess (upper recess in FIG. 11), and 43 is a perforated hole.

The upper surface of the head 23a of the screw 23 (see FIG.
13 is a view seen in the direction of arrow F in FIG. 1). Here, 51a and 51b are concave portions (recessed downward in FIG. 11) provided on the upper surface of the head 23a of the screw 23, 52a and 52b are convex portions (convex upward in FIG. 11), and 24 is a perforated hole. is there.

The procedure for assembling the sealing device 20 will be described below. First, as shown in FIG.
a and 41b are fitted into the recesses 51a and 51b of the screw 23, respectively, and the projections 52a and 52b of the screw 23 are fitted into the recesses 42a and 42b of the case 22, respectively.
The screw 23 is housed in the case 22.

Next, the striker 25 is inserted into the hole 24 of the screw 23.
Insert. At this time, as shown in FIG.
Since the holes 43 formed in the upper plate portion 22a of the case 22 are arranged at different positions in the circumferential direction, the striker 25
The tip of the abuts on the lower surface of the upper plate portion 22a of the case 22.

In this state, the leaf spring 27 is pressed against the lower surface of the head portion 23a of the screw 23, the coil spring 26 is pressed against the lower end of the striker 25 by the bottom support plate 28, and the bottom support plate 28 is reduced in diameter from below. It is pushed up by the C-shaped ring 29 in the opened state. By fitting the C-shaped ring 29 into the groove 31 provided on the inner surface of the cylindrical portion 22b of the case 22, the case 22, the screw 23, the striker 25, the coil spring 26, the leaf spring 27, and the bottom receiving plate 2
The 8 and C-shaped ring 29 are integrated.

Finally, the aluminum plate 21 is placed on the upper plate portion 22a of the case 22, and the aluminum plate 21 is fixed by the caulking portion 30 provided in advance on the upper plate portion 22a of the case 22 to form the sealing device 20. To be done.

In the following, a procedure for sealing using the sealing device 20 is shown in FIGS. 9, 10 and 14 to 16. Here, the case where the lid 13 is fixed and sealed to the storage container 11 as in the first embodiment will be described as an example. First, as shown in FIG. 9, the tip of the leg portion 23b of the screw 23 of the sealing device 20 is pressed against the position to be sealed, and the case 22 is rotated by a spanner or the like (direction of arrow B), so that the leg portion 23b.
Is screwed in the direction of arrow A.

After the lower end of the cylindrical body portion 22b of the case 22 contacts the upper surface of the lid 13, the vertical position of the case 22 remains the same, but the convex portions and the concave portions (41a, 41b) of the case 22 and the screw 23 are retained. 51a, 51b and 52a,
While the case 22 is rotated, the screw 23 is also rotated while 42a, 42b for 52b are fitted, so that the leg portion 23b is screwed in the direction of arrow A.
As a result, the screw 23 moves in the same direction against the action of the leaf spring 27.

At this time, the case 22 and the convex portion and the concave portion of the screw 23 which are fitted to each other gradually decrease the fitting depth, and eventually the fitting is released. After that, the screw 23 does not rotate while the case 22 rotates about a quarter turn, and the leg portion 23b does not rotate.
However, when the side surfaces of the convex portions 41a and 41b of the case 22 and the side surfaces of the convex portions 52a and 52b of the screw 23 come into contact with each other, the case 22 is rotated again to rotate the screw 23 and the leg portion. 23b can be screwed in.

The length of contact between the side surfaces of the convex portions 41a and 41b of the case 22 and the side surfaces of the convex portions 52a and 52b of the screw 23 gradually decreases, and finally, as shown in FIG. Even if the screw 23 is rotated in the B direction, the screw 23 does not rotate and the leg portion 23b cannot be screwed in the arrow A direction. Further, in this state, the case 22 cannot be removed, that is, it cannot be moved in the direction of the arrow D.

At this time, as shown in FIG. 15, the hole 24 of the screw 23 and the hole 43 of the case 22 are at different positions in the circumferential direction, and the tip of the striker 25 is the upper plate portion 22 of the case 22.
a It is in contact with the lower surface. When the case 22 is rotated in the direction of arrow C in FIG. 14 to remove the sealing device 20, the screw 23 cannot be rotated. Therefore, as shown in FIG.
When the circumferential position of the striker 25 coincides with that of the hole 24, the striker 25 moves the aluminum plate 2 by the action of the coil spring 26.
Break through 1. Therefore, by recording the pattern of the aluminum plate 21 placed on the case 22 in a photograph, it is possible to check it when necessary and confirm that the seal is not broken.

Also in this second embodiment, when the legitimate administrator himself removes the sealing device 20, the aluminum plate 21 is pierced by the striker 25, and the striker 25 is used, or instead of the striker 25. The case 22 and the screw 2 are inserted by a procedure such as inserting a rod-shaped member.
It is necessary to integrate 3 and the aluminum plate 21 is also disposable.

As described above, the sealing devices described as the first and second embodiments each have a simple structure, and the attachment / detachment can be automated by a robot or the like. In the first and second embodiments, an anodized aluminum plate was used as a part having a pattern whose surface cannot be duplicated.
It is also possible to use parts made of other materials that are patterned by an appropriate method according to the sealing device to be manufactured. In addition, as a verification method, a method of taking a photograph using a general camera and performing a visual verification has been described as an example, but a CCTV camera or a floppy disk camera is used for recording, and image processing technology is used for verification. An appropriate method such as application may be adopted.
Further, although the case where the container and the lid thereof are sealed has been described as an example, the sealing device of the present invention can be widely applied to sealing the opening / closing part of the measuring instrument, the parts of the machine and the like.

[0033]

As described above, according to the sealing device of the present invention, the following effects can be obtained. According to the sealing device of the present invention, at least one or more of the components forming the sealing device can be visually recognized from the outside, and a component having a non-reproducible pattern is applied. Has a structure in which the non-reproducible parts with a pattern are destroyed. Therefore, by recording the pattern with a suitable method after sealing, whether the sealing device has been replaced or not. Can be easily confirmed. In addition, since the sealing device can have a simple structure, the attachment / detachment can be automated by a robot or the like.

[Brief description of drawings]

FIG. 1 is a sectional view showing a sealing device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a protrusion is fixed to a plate (aluminum plate) having a non-reproducible pattern on the surface of the embodiment.

FIG. 3 is a perspective view of a cap seal of the same embodiment.

FIG. 4 is a sectional view of the same.

5A and 5B are a front view and a cross-sectional view of a special screw of the embodiment.

FIG. 6 is a cross-sectional view when the cap seal is capped on the special screw of the embodiment.

FIG. 7 is a cross-sectional view when the protrusion of the cap seal expands the fitting portion of the special screw.

FIG. 8 is a cross-sectional view when a special screw is capped by a cap seal.

FIG. 9 is a sectional view showing a sealing device according to a second embodiment of the present invention.

10 is a cross-sectional view at a position different from that in FIG. 9 in the circumferential direction.

FIG. 11 is a configuration diagram of a sealing device.

FIG. 12 is a bottom view of the case.

FIG. 13 is a top view of the seal bolt.

FIG. 14 is a cross-sectional view showing a state in which mounting of the sealing device is completed.

15 is a cross-sectional view at a position different from that in FIG. 14 in the circumferential direction.

FIG. 16 is a cross-sectional view showing a state where the striker protrudes.

[Explanation of symbols]

1 Sealing device 2 Special screw 3 Cap seal 4 Plate (aluminum plate) with a non-reproducible pattern on the surface 5 Projection part 5a Head part 5b Leg part 6 Screw 7 Fitting part 8 Engaging part 11 Storage container 13 Lid 20 Sealing device 21 Plate (aluminum plate) with a non-reproducible pattern on the surface 22 Case 23 Screw (seal bolt) 24 hole 25 Striker 26 Coil spring 43 hole

Claims (2)

[Claims] 1. A sealing device having a sealing member which is attached to a sealing object and which is deformed or destroyed when the sealing object is opened, wherein the sealing member is visually invisible and cannot be duplicated. A sealing device comprising a member on which a pattern is formed. 2. The sealing device according to claim 1, wherein the sealing member is made of a metal material, and the pattern is a pattern based on a property of the metal material subjected to surface treatment.