JP3731188B2 - Wristband ground wiring - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a wristband grounding wiring for removing static electricity charged on a human body through a wristband.
[0002]
[Prior art]
To protect against damage, deterioration, and deterioration caused by static electricity accumulated in the body of workers when manufacturing / assembling / inspecting static-sensitive semiconductor devices or repairing / inspecting equipment that incorporates semiconductor devices, etc. A wrist strap is used. The wrist strap consists of a wristband with a conductor piece that comes into direct contact with a part of the human body and a grounding wire for the conductor piece. Normally, the grounding wire and the conductor piece can be attached and detached using a snap. Yes.
[0003]
On the other hand, a conductive mat is placed as a conductive sheet on the work table or floor surface that handles semiconductor devices, etc., and this conductive mat is grounded with ground wiring, and the semiconductor device is placed on the top surface for work. Done. By using a conductive mat, the generation of static electricity due to frictional charging and induction charging can be prevented, and semiconductor devices and the like can be protected.
[0004]
Conventionally, the problems of wristband grounding and conductive mat grounding have been considered separately, and dedicated ground wiring facilities have been used for grounding the wristband and the conductive mat.
[0005]
[Problems to be solved by the invention]
However, such safety measures are not always perfect. Normally, the wristband grounding wiring stands on the floor and is connected to the wristband. However, since the wristband is attached to the wrist, the grounding wiring is greatly shaken by the movement of the hand during work. A large force may be applied to the wiring terminal and the grounding of the human body may be released. Of course, if the grounding of the human body is released, even if the conductive mat is grounded, there is an unavoidable risk that the charge will move to the semiconductor device or the like when the finger of the charged operator touches it. In addition, it is cumbersome to provide dedicated ground wiring facilities for the wristband and the conductive mat in the workplace.
[0006]
An object of the present invention is to provide a wristband grounding wiring that can also be used as a grounding wiring for a conductive mat.
[0007]
[Means for Solving the Problems]
To achieve the above object, the wristband grounding wiring according to the present invention is a wristband grounding wiring having a holder,
It consists of wristband side wiring and ground side wiring,
The wristband side wiring is the wiring to connect to the wristband,
Ground side wiring is grounding to the ground,
The wristband side wiring and the ground side wiring are connected so as to be removable with a holder.
The holder is attached to the ground side wiring, and has a wiring coupler and a hook,
The wiring coupler is to connect the wristband side wiring and the ground side wiring in an electrically removable manner,
The hook is detachably coupled to a mating hook provided at a fixed position of the conductive sheet, and the holder is connected to the conductive sheet to be fixed at the fixed position.
[0008]
Also, the hook of the holder is to be coupled to the mating hook attached to the conductive mat laid on the work table or on the floor for grounding.
[0009]
Moreover, the ground side wiring has a resistor,
Resistors are intended to ensure the safety of the human body by limiting the externally applied current to the human body.
The wiring coupler and the hook are connected in series with a resistor.
[0010]
The holder has two or more wiring couplers, and each wiring coupler is connected in parallel to the hook.
[0011]
[Action]
The ground side wiring is appropriately connected to the ground terminal, and the holder hook is joined to the hook of the laid conductive mat to fix the holder in place. The wristband side wiring is coupled to the wiring coupling tool of the holder, and the wristband is attached to the wrist for work. Static electricity of the human body is leaked from the wristband side wiring to the ground through the grounding side wiring, and external static electricity applied from other than the human body to the semiconductor device etc. is leaked from the conductive mat to the ground through the grounding side wiring and is external to the human body. The current applied from is limited by a resistor to ensure the safety of the human body.
[0012]
The wiring connector is a plug and a socket. Normally, a socket is attached to the holder and a plug is attached to the wristband wiring side, and the plug is inserted into the socket to electrically connect the wristband to the ground terminal.
[0013]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the wristband ground wiring according to the present invention is for grounding the wristband 1 and is divided into a wristband side wiring 2 and a ground side wiring 3. The wristband 1 is attached to the wrist of a human body, has a conductor piece 4, and the conductor piece 4 and one end of the wristband side wiring 2 are detachably connected by a snap 5. A plug 6 is attached to the other end as a wiring coupler.
[0014]
The wristband side wiring 2 is for electrically connecting the wristband 1 and the ground side wiring 3. The ground side wiring 3 has a holder 7 at one end and a clip 8 at the other end. The clip 8 attaches the ground side wiring 3 to the ground terminal 9 on the floor.
[0015]
As shown in FIG. 2, the holder 7 is obtained by incorporating a socket 11 as a wiring coupler and a hook 12 into a molded body 10 made of synthetic resin. The hook 12 is made of a metal material and is detachably coupled to a mating hook 14 mounted at a fixed position on the work table 13 side shown in FIG. 3 and is attached to the bottom surface of the holder 7. Yes.
[0016]
The socket 11 is used to insert the plug 6 of the wristband side wiring 2 and is mounted so as to face one side of the holder 7. The socket 11 and the hook 12 of the holder 7 are connected in series to the ground side wiring 3 via the resistor 15. The resistor 15 is normally a 1 MΩ current limiting resistor. The hook 14 to be connected to the hook 12 of the holder 7 is attached to a conductive mat 16 laid on the work table 13, for example. The conductive mat 16 is obtained by processing a conductive material made of rubber, synthetic resin or the like into a sheet shape, and is a rug for placing a semiconductor device or the like to be handled during work.
[0017]
In the embodiment, the hook 12 of the holder 7 is coupled to the hook 14 of the conductive mat 16 placed on the work table 13, and the clip 8 of the ground side wiring 3 extending from the holder 7 is locked to the ground terminal 9 on the floor. . Depending on the shape of the ground terminal 9, various clips 8 corresponding to the clip 8 can be adopted. During the work, the plug 6 of the wristband side wiring 2 is inserted into the socket 11 of the holder, and the wristband 1 is wound around the wrist of the worker to perform work such as production / assembly or inspection of the semiconductor device on the work table 13. Do.
[0018]
In the present invention, the worker's body is grounded to the ground through the wristband side wiring 2 and the ground side wiring 3, and the conductive mat 16 on the work table 13 is grounded to the ground through the ground side wiring 3. Are not affected by static electricity from the human body or other than the human body during the handling, and even if the power line touches the conductive mat 16, the semiconductor device or the like is not affected. Even if the human body touches the power line, the current flowing through the human body is limited by the resistor, and the safety of the human body is ensured.
[0019]
The holder 7 may be provided with two or more sockets 11, 11,... As shown in FIG. The two or more sockets 11 are connected in parallel to the hook 12 of the ground side wiring 3, face the part of the outer surface of the holder 7, and are integrally molded with the molded body 10. The ground-side wiring 3 may be connected to the hook 12 through the resistor 15, but a resistor 15 may be provided between the hook 12 and the socket 11 in consideration of the safety of a plurality of workers. desirable. In use, the holder 7 is attached to the conductive mat 16, and the plug 6 of the wristband side wiring 2 is inserted into each socket 11, 11,..., And one holder is shared by two or more wristbands. .
[0020]
Further, the ground side wiring 3 can be connected via the socket 11 similarly to the wristband side wiring 2 without being directly connected to the hook 12. In this case, the resistor 15 is arranged in series. If the current limiting resistance of the entire wristband grounding wiring from the wristband to the ground terminal is 1 to 10 MΩ, preferably about 1 to 5 MΩ, There is no problem with the power line.
[0021]
In the embodiment, the conductive mat 16 placed on the work table 13 as the conductive sheet has been described as an example. However, when repairing or inspecting a device incorporating a semiconductor device or the like, the worker carries it and lays it on the floor surface. Thus, the present invention can be applied to a conductive floor material fixedly laid on the floor surface even if the conductive mat is used.
[0022]
In the present invention, the holder 7 is not limited to the case where the holder 7 is fixed to the conductive mat 16, and the counterpart hook 14 is provided at an appropriate place near the work base, frame, column, and other work positions. If 7 is locked, it can be stored neatly without scattering the wiring after the work is completed.
[0023]
【The invention's effect】
As described above, according to the present invention, the wristband grounding wiring can also be used as the grounding wiring for the conductive mat to simplify the grounding wiring equipment. For grounding the conductive mat, the hook of the holder is coupled to the hook of the conductive mat. The holder is fixed to the conductive mat, the ground side wiring is not shaken during the work, and an excessive force is not applied to the clip coupled to the ground terminal.
[0024]
In addition, since a resistor is connected to the ground side wiring, even if a current flows through the human body, the current is limited, and the safety of the human body is ensured. Furthermore, by providing two or more sockets as wiring couplers in the holder, one ground side wiring can be shared by two or more wristbands, and the wiring facility can be further simplified.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a wristband wiring according to the present invention.
FIG. 2 is a view showing a structure of a holder.
FIG. 3 is a diagram showing an example of use of the present invention.
FIG. 4 is a diagram showing another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Wristband 2 Wristband side wiring 3 Ground side wiring 4 Conductor piece 5 Snap 6 Plug 7 Holder 8 Clip 9 Ground terminal 10 Molded body 11 Socket 12 Hook 13 Work table 14 Hook (mating side)
15 Resistor 16 Conductive mat

Claims (4)

Wristband grounding wiring having a holder,
It consists of wristband side wiring and ground side wiring,
Wristband side wiring is wiring connected to the wristband,
Ground side wiring is grounding to the ground,
The wristband side wiring and the ground side wiring are connected so as to be removable with a holder,
The holder is attached to the ground side wiring and has a wiring coupler and a hook,
The wiring coupler is to connect the wristband side wiring and the ground side wiring in an electrically removable manner,
Hook is a wristband that is detachably coupled to a hook on the other side of the conductive sheet, and the holder is connected to the conductive sheet and fixed in place. Grounding wiring. 2. The wristband grounding wiring according to claim 1, wherein the hook of the holder is connected to a mating hook attached to a conductive mat laid on a work table or on a floor surface for grounding. The ground side wiring has a resistor,
Resistors are intended to ensure the safety of the human body by limiting the externally applied current to the human body.
The wristband grounding wiring according to claim 2, wherein the wiring coupler and the hook are connected in series with a resistor. 4. The wristband ground wiring according to claim 1, wherein the holder has two or more wiring couplers, and each of the wiring couplers is connected in parallel to the hook. .

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