JP2013000546A - Sealing screw with identification code - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that it is impossible to determine whether sealing has been continuous even if sealed by a sealing screw, since sealing screws can be unsealed by means of the method of destroying the screw head and pulling out the screw section, and then it is possible to re-seal with a different screw of the same type.SOLUTION: Insert molding or the like by resin or the like is performed at a screw body, the screw head is sealed, and a screw is used having a breaking plane to be broken at fixed tightening torque at the outer peripheral side of the sealed section. An identifying code, for which a different code is allocated to each user group, is attached to the sealed section. It is possible to determine that another group has not performed unsealing if sealed by a sealing screw with an identifying code that is the same as when sealing has been performed with the sealing screw.

Description

  The present invention relates to a sealing screw.

  There are screws that are restricted in removal, and there are various types of anti-tampering screws that protect the state inside, protection of information, and screws that seal tightly with respect to sealing.

  JP 2010-078145 A

There is a tamper-proof screw in the screw for the purpose of restricting removal for a prank.
The tamper-proof screw has a structure in which the screw cannot be removed with a tool that is generally available with a special shape of the engaging portion. However, there is a drawback that if a tool that can be engaged by a mischievous person is obtained, it can be freely detached.

  In addition, the sealing screw patent document 1 can surely perform sealing. However, a person trying to open the seal breaks the head part of the screw and pulls out the screw part using a screw pulling tool such as a remover. If it is sealed again with the screw of the same document mentioned above, it cannot be judged whether or not it has been sealed.

  In addition, there is a drawback that the structure for sealing becomes complicated.

  Realized by performing insert molding with resin etc. on the screw body, sealing the screw head, attaching an identification symbol to the sealed part, and using a screw with a fracture surface that breaks with a constant tightening torque on the outer periphery of the sealed part To do.

When tightening the screw, it is tightened with a tool that engages the outer periphery of the fracture surface. When completely tightened, a constant tightening torque is transmitted and the fracture surface is broken.
The shape of the sealed portion after the breakage is such that a tool or the like cannot be engaged.
Opening is performed by removing the sealing resin portion with a cutter or the like with a tool that engages the screw head of the metal portion.

  About the identification symbol, the symbol is decided for each user organization and distribution management is performed. As a result, it can be determined that the sealing is continued if the sealing screw remains attached.

  In addition, it is easy to produce the screw body, insert injection molding with resin, and identification symbol printing.

  If the sealing screw is attached in the same state as when it was sealed, it can be determined that it has not been opened.

Overall view of sealing screw of the present invention Screw shape of metal part Illustration with seal screw attached

Description of FIGS. 1 to 3 First, the metal part of the screw body shown in FIG. 2 is produced. The metal portion includes a thread groove portion 1, a resin weld portion 5, and a tool engaging portion 6 at the time of removal.

The metal part is insert-molded with resin or an equivalent material.
In the above molding, the sealing portion 2, the fracture surface 3, and the tool engaging portion 4 at the time of tightening are molded.
The fracture surface is designed to have a cross-sectional area considering the resin shear stress so that it breaks at a constant torque. The shape of the tool engaging portion at the time of tightening can be selected for any reason as long as it can transmit the necessary torque at the time of tightening. When tightening by hand, there is no problem with a handle that can transmit the necessary torque.
An identification number 2A is added to the sealed portion.

The attachment is performed by engaging the tool with the attachment tool engaging portion. When the torque exceeds a certain level, the fracture surface 3 is broken and the installation is completed. The completed state diagram is FIG. The sealing is completed by the above operation.

  Opening is performed with a removal tool by cutting off the sealed portion with a cutter or the like, exposing the tool engaging portion 6 during removal. At this time, since the sealing portion is cut off with a cutter or the like, it cannot be restored to the original state. In addition, when sealing with another sealing screw, it becomes an identification number for each organization used, so when it is performed by an external organization, it can only be performed using a different symbol from the old symbol.

  From the above, it can be determined that if the sealing screw is attached in the same state as when it is sealed, it has not been opened.

DESCRIPTION OF SYMBOLS 1 Thread groove part 2 Sealing part 2A Identification symbol 3 attached to sealing part 3 Fracture surface 4 Tightening tool engaging part 5 Resin welding part 6 Removing tool engaging part 7 Sealed box 7A Sealed box cover

Claims (2)

  A screw having a fracture surface that breaks when a constant torque is applied to the outer periphery of the screw body made of metal, a sealing portion made of resin or an equivalent material welded to the screw head, and the outer periphery of the sealing portion.   A sealing screw that can identify a sealed organization by adding an identification symbol to the sealing portion and managing the identification symbol for each user organization.

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