JP4930859B2 - Electromagnetic shielding door - Google Patents

Description

  The present invention relates to an electromagnetic wave shielding door in which an electromagnetic wave shielding door body and an electromagnetic wave shielding door frame are conductively connected by an electromagnetic wave shielding material when the electromagnetic wave shielding door body and the electromagnetic wave shielding door frame are closed.

There exists a thing disclosed by patent document 1 as a conventional electromagnetic shielding door. In Patent Document 1, a long metal member is provided on the lower end surface portion of the electromagnetic shielding door main body, and the housing groove portion (the dovetail groove) having an insertion opening on the lateral end surface of the electromagnetic shielding door main body is provided on the lower end side of the electromagnetic shielding door main body. It is formed along. A plate material (long member) is removably attached to the housing groove portion from the fitting opening. An electromagnetic wave shielding material is provided on the lower side of the plate material. Further, an urging member such as a leaf spring is interposed between the housing groove and the plate material, and the plate material is always urged toward the lower frame of the electromagnetic shielding door frame to open the opening of the metal member. Conductive connection is made to the heel portion. When the electromagnetic shielding door main body is closed, the electromagnetic shielding material of the plate material urged by the urging member is conductively connected to the lower frame of the electromagnetic shielding door frame. As a result, the electromagnetic shielding door body and the electromagnetic shielding door frame are electrically conductively connected to prevent electromagnetic waves from entering and leaking.
JP 2002-70440 A

In the thing of patent document 1, the biasing member is provided between the accommodation groove part of a metal member, and plate material, and it is urging | biasing toward the lower frame of the electromagnetic wave shielding door frame, and plate material is stored in the accommodation groove part. Although it is connected to the flange part of the opening, since the plate material and the metal member are long members, the plate material and the receiving groove must be manufactured with high precision in order for both members to contact over the entire length. I must. If the accuracy between the plate material and the receiving groove is low, there is a possibility that there is a non-contact part and there is a possibility that the entire surface does not come into contact with the surface, the contact area becomes small, a gap is formed, and the electromagnetic wave shielding performance is lowered. is there. In addition, since the urging member is provided between the housing groove portion of the metal member and the plate material, it is difficult to insert and remove the plate material by the urging force of the urging member when the plate material is inserted and removed from the housing groove portion. There is a problem that the work of replacing the material cannot be performed quickly and easily and the workability is poor.
Therefore, the present invention has been made in view of the above-described problems, and can easily and easily replace the electromagnetic shielding material. The conductive mohair material is provided on the upper surface of the plate material, and the plate material and the electromagnetic shielding door main body are provided. An electromagnetic wave shielding door having a high electromagnetic wave shielding performance by increasing the contact area is provided.

In order to achieve the above object, according to the first aspect of the present invention, in the lower door body mounting member attached to the lower edge of the electromagnetic shielding door body, an accommodation groove extending along the lateral direction of the door is formed. A conductive plate material having a conductive mohair material fixed to the upper surface and the lower surface of the attachment groove so as to open to the door end side of the accommodation groove portion is mounted so as to be movable up and down in the vertical direction. When the shielding door body is closed, the mohair material on the lower surface of the plate material comes into contact with the lower frame of the electromagnetic shielding door frame, so that the plate material is pushed upward. The electromagnetic wave shielding door main body and the electromagnetic wave shielding door frame body are conductively connected in contact with the bottom surface of the electromagnetic wave .

According to the second aspect of the present invention, when the electromagnetic shielding door main body is opened, the top of the mohair material on the top surface of the plate material is separated from the bottom surface of the receiving groove portion by the plate material descending by its own weight. Features.

In the invention of claim 1 of the present application, the lower door body side mounting member attached to the lower edge of the electromagnetic shielding door body is formed with a housing groove extending along the lateral direction of the door, and the door end side of the housing groove In a state where the conductive plate material having the conductive mohair material fixed on the upper surface and the lower surface is mounted so as to be able to be moved up and down , and the electromagnetic shielding door body is closed , from the attachment / detachment opening provided so as to open The mohair material on the lower surface of the plate material comes into contact with the lower frame of the electromagnetic shielding door frame, so that the plate material is pushed upward, and the mohair material on the upper surface of the plate material comes into contact with the bottom surface of the receiving groove to shield the electromagnetic wave. Since the door body and the electromagnetic shielding door frame are conductively connected, the plate material and the electromagnetic shielding door body are conductively connected via the mohair material on the upper surface of the plate material, so that the plate material and the electromagnetic shielding door body are highly accurate. Made Can not be a gap in contact throughout the electromagnetic shielding door body by mohair material is deformed without, it is possible to increase the contact area can be made higher electromagnetic wave shielding performance.

Further, in the invention of claim 2 of the present application, when the electromagnetic shielding door body is opened, the tip of the mohair material on the top surface of the plate material is separated from the bottom surface of the housing groove portion by the plate material descending by its own weight . Therefore, when the door is opened, the mohair material is separated from the bottom surface of the receiving groove portion, so that a biasing member is interposed between the plate material and the receiving groove portion so that the receiving groove portion and the plate material are connected to each other. Since it is not relatively biased, there is an advantage that the resistance when the plate material is attached to and detached from the housing groove is small and can be replaced quickly and easily.

  Next, an embodiment of the present invention will be described with reference to FIGS. The electromagnetic shielding door 1 includes an electromagnetic shielding door body 2 and an electromagnetic shielding door frame 3. The electromagnetic shielding door body 2 is hinged so as to be openable and closable with respect to the electromagnetic shielding door frame body 3 by a hinge 4 provided between the electromagnetic shielding door body 2 and the suspending side of the electromagnetic shielding door frame body 3. . The electromagnetic shielding door frame 3 is made of a steel frame 5, a door end side frame 6, an upper frame 7, an upper frame 7, and a hull 8 as a lower frame. The electromagnetic shielding door frame 3 is attached to the opening of the finishing material 14.

The electromagnetic shielding door body 2 is configured by providing a plurality of force bones (not shown) at equal intervals inside the steel surface plates 9. As shown in FIGS. 2 and 3, the electromagnetic shielding door main body 2 is made of an aluminum door main body on the door end side edge portion (free end side edge portion) 10, the suspension side edge portion 11, and the upper edge portion 12. The mounting member 13 is screwed. The door main body side mounting member 13 is formed with a plurality of concave and convex portions 16 along the longitudinal direction, with the electromagnetic wave absorbing material 15 engaged therewith .

  As shown in FIG. 2 and FIG. 3, the suspension side side frame 5, the door end side side frame 6, and the upper frame 7 of the electromagnetic shielding door frame body 3 are respectively provided on the surfaces facing the electromagnetic shielding door body 2. The door frame body side mounting member 17 made of aluminum is screwed so as to face the door body side mounting member 13 when the electromagnetic wave shielding door body 2 is closed. The door frame side mounting member 17 is provided with an electromagnetic wave absorber 15 facing the electromagnetic wave absorber 15 of the electromagnetic wave shielding door body 2 along the longitudinal direction. The electromagnetic wave absorber 15 facing the electromagnetic wave shielding door body 2 and the electromagnetic wave absorbing material 15 on the electromagnetic wave shielding door frame 3 side absorb and attenuate the electromagnetic wave while reflecting each other. Further, the door frame body side mounting member 17 of the electromagnetic shielding door frame body 3 is a plate material having conductivity by a fitting portion 18 formed so as to protrude and a retaining member 20 screwed by a mounting bolt 19. 21 is attached so as to be detachable from the door opening / closing direction of the electromagnetic shielding door frame 3. A conductive mohair material 22 is fixed to the side surface of the door frame body and the side surface of the door body of the plate material 21 as an electromagnetic wave shielding material. The conductive mohair material 22 includes a conductive metal filler, a metal film, etc., resin fibers, and a conductive adhesive layer for fixing to the plate material 21. The conductive mohair material 22 on the side surface of the door body is restored (elastic) due to the bending of the tip in the mounted state of the plate material 21, and the door frame body side mounting member 17 is not manufactured with high accuracy. The mounting member 17 is uniformly contacted over the entire length, and the contact area is increased.

  Further, as shown in FIG. 3, the electromagnetic shielding door main body 2 is provided with a lower door main body side mounting member 24 facing the huller 8 at the lower edge 23. The lower door body side mounting member 24 is formed with a housing groove 25 extending along the door lateral direction. As shown in FIG. 5, the accommodation groove portion 25 is provided with an attachment / detachment opening 26 that opens to the free end side of the electromagnetic shielding door body 2, that is, the door end side. The attachment / detachment port 26 is normally closed by an inspection lid 27 that can be attached / detached by a screw (not shown). A conductive plate material 28 is detachably attached to the accommodation groove 25 from the attachment / detachment opening 26.

  Further, mohair materials 29 and 30 having conductivity are fixed to the upper surface 28a and the lower surface 28b of the plate material 28, respectively. As shown in FIG. 4, the plate material 28 to which the conductive mohair materials 29 and 30 are fixed can be moved up and down by a predetermined amount L with respect to the housing groove portion 25. The conductive mohair material 30 on the lower surface 28b of the plate material 28 constitutes an electromagnetic wave shielding material, and comes into contact with the hull 8 in the state where the electromagnetic wave shielding door body 2 is closed to the closed position A. As described above, the huller 8 is made of steel, and functions as an electromagnetic wave shielding material that shields electromagnetic waves by being conductively connected to the electromagnetic wave shielding door body 2 by contacting the conductive mohair material 30 on the lower surface 28b of the plate material. Further, as shown in FIGS. 3 and 4, the huller 8 is higher than the floor surface 32 and has an inclined upper surface 8 a.

The length of the bristle of the conductive mohair material 29 on the upper surface 28a of the plate material 28 is such that the conductive mohair material 30 on the lower surface 28b of the plate material 28 contacts the hull 8 in the state where the electromagnetic shielding door body 2 is in the closed position A. When the plate material 28 is pushed up in contact, the tip of the conductive mohair material 29 comes into contact with the bottom surface 25a of the receiving groove 25 and the electromagnetic shielding door body 2 is opened to the open position B. The contact between the conductive mohair material 30 on the lower surface 28b and the pallet 8 is released, and the plate material 28 descends so that the front end of the conductive mohair material 29 on the upper surface 28a of the plate material 28 accommodates the electromagnetic shielding door body 2. It is set to the length of the bristles that descends from the bottom surface 25a of the groove 25 and separates. That is, a predetermined amount L that can be moved up and down with respect to the receiving groove 25 of the plate material 28 is pushed up by the conductive mohair material 30 on the lower surface 28b of the plate material 28 when the door is closed , and the conductive mohair material on the upper surface 28a of the plate material 28. The top surface of the plate material 29 can be brought into contact with the bottom surface 25a of the receiving groove portion 25, and the front end of the conductive mohair material 30 on the top surface 28a of the plate material 28 can be separated from the bottom surface 25a of the receiving groove portion 25 when the door is opened. It is set to the distance between 28a and the accommodation groove part bottom face 25a.

  Reference numeral 31 denotes a door operation unit provided with a door knob 33 and a lock 34. As shown in FIG. 6, the door operation portion 31 has a door knob conductive cylinder member 35 welded thereto. A conductive annular member 36 having a conductive mohair material 22 attached to its outer peripheral surface is rotatably inserted into the door knob conductive cylindrical member 35, and is electrically connected to the door knob conductive cylindrical member 35. Yes. A handle shaft 37 of the door knob 33 is inserted into the conductive annular body 36 and can be rotated integrally. Moreover, as shown in FIG. 7, the door operation part 31 is welded at the other end of the lockable conductive cylinder member 38 having a closing member having an insertion hole formed at one end. A conductive mohair material 22 is attached to the inner peripheral surface of the lock conductive cylinder member 38 and is conductively connected to the outer peripheral surface of the inner cylinder 39 of the lock 34 attached to the door operation unit 31. In the door operation unit 31, the door knob 33 and the lock 34 are conductively connected to the door operation unit 31 via the conductive mohair material 22, the door knob conductive cylinder member 35, and the lock conductive cylinder member 38, respectively. The leakage and entry of electromagnetic waves from the operation unit 31 are prevented.

Next, the operation will be described. As shown in FIG. 2 and FIG. 3, when the electromagnetic shielding door main body 2 is in the closed position A, the hanging side side frame 5, the door end side side frame 6, and the upper side The conductive mohair material 22 of the plate material 21 of the frame 7 is in pressure contact. When the conductive mohair material 22 on the door frame side of the plate material 21 is in pressure contact with the door body side mounting member 13 , the contact area is increased and the electromagnetic wave shielding performance is improved. Further, the conductive mohair material 30 on the lower surface 28b of the plate material 28 attached to the lower edge 23 of the electromagnetic shielding door body 2 is pressed against the hull 8, so that the electromagnetic shielding door body 2 and the electromagnetic shielding door frame 3 are connected. Conductive connection is made to shield electromagnetic waves.

At this time, in the state where the electromagnetic shielding door main body 2 is in the closed position A, the conductive mohair material 30 on the lower surface 28b of the plate material 28 is pressed against the hull 8 as shown in FIG. When the conductive mohair material 30 on the plate material lower surface 28b is pushed up by the upper surface 8a and the plate material 28 is also pushed up, the conductive mohair material 29 on the upper surface 28a of the plate material 28 is bent at the tip of the conductive mohair material 29. Thus, the lower edge 23 of the electromagnetic shielding door main body 2 and the huller 8 are conductively connected via the plate material 28 in contact with or pressed against the bottom surface 25a of the receiving groove 25 .

  The tip of the conductive mohair material 29 on the plate material upper surface 28a is bent and abutted over the entire length to the bottom surface 25a of the receiving groove 25, so that the contact area can be increased, no gap is formed, and the conductivity is high. Become. Further, since the plate material 28 and the receiving groove portion 25 are conductively connected via the conductive mohair material 29, the plate material 28 and the receiving groove portion 25 do not need to be manufactured with high accuracy, and between the plate material 28 and the receiving groove portion 25. There is no gap when the door is closed. Further, when the electromagnetic shielding door main body 2 is set to the open position B, the floor surface 32 is lower than the sash 8 so that the push-up of the conductive mohair material 30 on the plate material lower surface 28b by the sash 8 is released and the plate material 28 is self-weighted. As a result, the mohair material 29 on the plate material upper surface 28a is separated from the bottom surface 25a of the receiving groove 25, so that the press contact is released.

  When the conductive mohair material 30 on the plate material lower surface 28b is deteriorated by repeatedly opening and closing the electromagnetic shielding door main body 2, the conductive mohair material 30 is replaced because the electromagnetic shielding performance is deteriorated. When the conductive mohair material 30 is replaced, the electromagnetic shielding door body 2 is set to the open position B in the opened state. At this open position B, the inspection lid 27 attached to the lower edge 23 of the door-end side frame 6 of the electromagnetic shielding door body 2 is removed, and the plate material 28 is directed from the attachment / detachment opening 26 toward the door laterally. Pulled out. At this time, the plate material 28 is lowered by a predetermined amount L and is not urged by the receiving groove portion 25, so that it can be smoothly pulled out without receiving a large resistance from the receiving groove portion 25. The extracted plate material 28 is replaced with the plate material 28 to which a new conductive mohair material 30 is attached and inserted into the receiving groove 25, and the attachment / detachment opening 26 is closed by the inspection lid 27.

  In this way, the plate material 28 in which the conductive mohair materials 29 and 30 are attached to the upper surface 28a and the lower surface 28b from the door side in the lateral direction of the door of the electromagnetic shielding door body 2 to the lower edge 23 of the electromagnetic shielding door body 2. Since the electromagnetic wave shielding door body 2 can be exchanged without removing it from the electromagnetic wave shielding door frame 3, the urging force does not act between the plate material 28 and the storage groove portion 25, and the conventional plate material can be replaced with the storage groove portion. Compared to those energized inside, the replacement work of the conductive mohair material can be performed quickly and easily. The plate material 28 to which the replaced conductive mohair materials 29, 30 are fixed is peeled off from the deteriorated conductive mohair materials 29, 30 and replaced with new conductive mohair materials 29, 30 for reuse. In the present embodiment, when the electromagnetic shielding door body 2 is opened, the conductive mohair material 30 on the lower surface 28b of the plate material has a length of hair that does not come into contact with the floor surface 32. Even if the conductive mohair material 30 is in contact with the floor surface 32, the length of the hair may be set such that the contact between the conductive mohair material 29 on the plate material upper surface 28a and the housing groove bottom surface 25a is released.

It is a front view of the electromagnetic wave shielding door of the present invention. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is explanatory drawing which shows the raising / lowering movement of the plate material at the time of opening and closing of an electromagnetic shielding door main body. It is a perspective view which shows insertion / extraction of the plate material from an electromagnetic wave shielding door main body. It is explanatory drawing which shows the electromagnetic wave shielding structure of a doorknob. It is explanatory drawing which shows the electromagnetic wave shielding structure of a lock.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic shielding door 2 Electromagnetic shielding door main body 3 Electromagnetic shielding door frame 23 Lower edge part 25 Housing groove part 25a Housing groove part bottom face 28 Plate material 28a Plate material upper surface 28b Plate material lower surface 29, 30 Conductive mohair material L Predetermined amount

Claims (2)

The electromagnetic shielding door body is provided so as to be openable and closable with respect to the electromagnetic shielding door frame body, and the electromagnetic shielding material provided at the lower edge of the electromagnetic shielding door body with the electromagnetic shielding door body closed and under the electromagnetic shielding door frame body In the electromagnetic shielding door that is electrically conductively connected to the electromagnetic shielding material provided on the frame, the lower door body side mounting member attached to the lower edge of the electromagnetic shielding door body has a door lateral direction. A conductive plate material is formed by attaching a conductive mohair material to the upper surface and the lower surface from an attachment / detachment opening provided so as to open to the door end side of the storage groove portion. When the electromagnetic wave shielding door body is closed , the plate is pushed upward by the mohair material on the lower surface of the plate material coming into contact with the lower frame of the electromagnetic shielding door frame. Mohair on top of the material Electromagnetic shielding door, characterized in that but to contact a conductive connection between the electromagnetic wave shielding door body and an electromagnetic wave shielding door frame body on the bottom of the housing groove. 2. The electromagnetic wave according to claim 1 , wherein in a state in which the electromagnetic shielding door body is opened, the tip of the mohair material on the upper surface of the plate material is separated from the bottom surface of the receiving groove portion by lowering the plate material by its own weight. Shield door.

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