JP2005171698A - Automatic closing hinge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic closing hinge, constituted so that a hiding cover plate of bolts fixing a movable side wing plate on a door cannot be removed from the movable side wing plate, in a door closed state. <P>SOLUTION: The automatic closing hinge comprises forming a pocket part 15 on the movable side wing plate 4, forming insertion holes 18 of fixing bolts 17 to the door 3 on a bottom wall part 16 of the pocket part 15, projecting and forming a pair of support wall parts 20 and 21 on a bottom wall part 16, forming screw holes 22 in the support wall part 20 facing a fixed side wing plate 2 during closing the door, forming a jointing slit 23 on the other support wall part 21, forming joint projections 24 on one sidewall part 19a of the cover plate 19, and forming receiving holes 25, in the other sidewall part 19b of the cover plate 19. It fits the joint projection 24 of the cover plate 19 into the joint slit 23 of the support wall part 21, and fixes the cover plate 19 on the movable side wing plate 4 by screwing a fixing screw 26 into the screw hole 22 of the support wall part 20 by the receiving hole 25 of the cover plate 19. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a hinge that is used for a door of a refrigerator or the like and that automatically closes and rotates by using a slope cam and its own weight.

  A fixed side wing plate fixed to the fixed frame body, a movable side wing plate fixed to the door, a fixed cam body provided at the bottom of the vertical shaft hole of the fixed side wing plate, and having a cam slope on the upper surface, and a fixed side wing A cam follower fitted into the vertical shaft hole of the plate so as to be pivotable, and has a cam inclined surface abutting against the cam inclined surface of the fixed cam body, and a movable side wing fixedly penetrated through the central portion of the cam follower An automatic closing hinge comprising an upper shaft inserted into and fixed to the vertical shaft hole of the plate and a lower shaft pivotably inserted into the vertical shaft hole of the fixed cam body is already known (see, for example, Patent Document 1). .

In this self-closing hinge, the cam follower can be pulled out from the vertical shaft hole of the fixed side wing plate in both the door closed state and the door open state, so that the coupling between the movable side wing plate and the fixed side wing plate is released. Can be removed from the fixed frame.
However, even when the door is closed, it is possible to release the coupling between the movable wing plate and the fixed wing plate, which means that the door is fixed to the fixed frame body by the door lock handle device separately provided on the opposite side of the hinge side by the hinge. This means that the door can be opened without permission even if it is firmly locked.

In the improvement of the above self-closing hinge, the stationary wing plate is provided with a stop projection, the movable side wing plate is provided with a locking projection, and engages with the stop projection at the lower position of the stop projection when the door is closed, while it is engaged when the door is opened. The stop protrusion and the locking protrusion 14 are arranged so that the engagement between the stop protrusion and the stop protrusion is released (see Patent Document 2).
In this automatic closing type hinge, since the restraining projection and the locking projection are engaged in the closed state, the movable side blade cannot move upward along the fixed side blade. The movable side blade cannot be separated from the fixed side blade.

  As a result of preventing the separation of the movable side blade plate and the fixed side blade plate by pulling out the cam follower from the vertical shaft hole of the fixed side blade plate, this time, the sticking of the movable side blade plate and the door is released and the door is removed. Has come to be planned.

  In the conventional self-closing hinge, a pocket portion is recessed on the front side of the movable side blade, and a fixing bolt is inserted from an insertion hole formed in the bottom wall portion of the pocket portion to fix the movable side blade to the door. The head portion of the fixing bolt is concealed by a cover plate having a U-shaped cross section that is fitted into the pocket portion.

  However, the cover plate is fitted and mounted by forming a pair of left and right support wall portions on the front side of the bottom wall portion of the pocket portion, and forming a joint receiving groove portion on the outer surface of the base portion of both support wall portions. Joining hooks are formed at the ends of the left and right side wall portions of the U-shaped cover plate, and the cover plate is fitted into the pocket portion so as to cover the pair of support wall portions. Since the cover plate is simply elastically engaged with the joint receiving groove portion of the support wall portion, the cover plate can be easily removed if intended, and the head of the fixing bolt can be exposed. The joint between the movable blade and the door can be released.

Japanese Patent Publication No.52-19394 Japanese Patent No. 3356267

An object of the present invention is to provide a self-closing hinge in which a cover plate for concealing a bolt for fixing a movable side blade to a door is not removable from the movable side blade in a closed state.
Another object of the present invention is to provide a concealing shielding plate for a bolt for fixing a side bracket body to a fixed frame body in a use form in which the fixed side blade plate is fixed to the fixed frame body via a side bracket body. An object of the present invention is to provide a self-closing hinge that cannot be removed from the side bracket body in the state.

Hereinafter, the main features of the invention of claim 1 will be described using reference numerals in the accompanying drawings. The main feature of the invention of claim 1 is a fixed side blade 2 fixed to the fixed frame 1, a movable side blade 4 fixed to the door 3, A fixed cam body 6 provided at the bottom of the vertical shaft hole 5 of the fixed side blade 2 and having a cam inclined surface 7 formed on the upper surface thereof and a vertical shaft hole 5 of the fixed side blade 2 are rotatably fitted and fixed to the lower surface portion. A cam follower 8 formed with a cam slope 9 that abuts the cam slope 7 of the cam body 6, and is fixedly provided so as to penetrate through the center of the cam follower 8, and the upper portion is inserted into the vertical shaft hole 10 of the movable blade 4. The shaft rod 12 is fixed and the lower portion is pivotably inserted into the vertical shaft hole 11 of the fixed cam body 6.
A stop projection 13 is provided on the fixed wing plate 2 and an engagement projection 14 is provided on the movable wing plate 4. When the door is closed, the engagement projection 14 engages with the stop projection 13 at a lower position of the stop projection 13 while the door is opened. The stop protrusion 13 and the stop protrusion 14 are arranged so that the engagement of the stop protrusion 14 and the stop protrusion 13 is sometimes released, and a pocket portion 15 is formed in the front side of the movable wing plate 4 so that the bottom of the pocket portion 15 is formed. Wall 1
6 is a self-closing hinge in which an insertion hole 18 for a fixing bolt 17 to the door 3 is formed and a cover plate 19 for concealing the fixing bolt 17 is fitted into the pocket portion 15 and attached.
A pair of left and right support wall portions 20 and 21 are formed to protrude from the front side of the bottom wall portion 16 of the pocket portion 15,
A screw hole 22 is formed in one support wall portion 20 on the side facing the fixed side blade 2 when the door is closed, and a joining slit 23 is formed in the other support wall portion 21 on the side farther from the fixed side blade plate 2, A bonding projection 24 is formed on one side wall portion 19 a of the cover plate 19, and the other side wall portion 19 of the cover plate 19 is formed.
A receiving hole 25 is formed in b,
The cover plate 19 is fitted into the pocket portion 15 so as to cover the pair of support wall portions 20, 21, the joining protrusion 24 of the cover plate 19 is fitted into the joining slit 23 of the support wall portion 21,
The cover plate 19 is fixed to the movable blade 4 by screwing the fixing screw 26 into the screw hole 22 of the support wall portion 20 from the receiving hole 25 of the cover plate 19.

The main feature of the invention of claim 2 is that the fixed side blade 2 fixed to the fixed frame 1 via the side bracket body 27, the movable side blade 4 fixed to the door 3, and the vertical axis of the fixed side blade 2. A fixed cam body 6 provided at the bottom of the hole 5 and having a cam slope 7 formed on the upper surface thereof and a vertical shaft hole 5 of the fixed side blade 2 are pivotally fitted, and a cam slope 7 of the fixed cam body 6 is provided on the lower surface of the hole 5. A cam follower 8 having a cam slant surface 9 abutting against the cam follower 8 and a cam follower 8 penetrating through the central portion of the cam follower 8 so that the upper part is inserted and fixed in the vertical shaft hole 10 of the movable side blade 4, and the lower part is a fixed cam. A shaft rod 12 that is pivotably inserted into the vertical shaft hole 11 of the body 6;
A stop projection 13 is provided on the fixed wing plate 2 and an engagement projection 14 is provided on the movable wing plate 4. When the door is closed, the engagement projection 14 engages with the stop projection 13 at a lower position of the stop projection 13 while the door is opened. The stop protrusion 13 and the stop protrusion 14 are arranged so that the engagement of the stop protrusion 14 and the stop protrusion 13 is sometimes released, and a pocket portion 15 is formed in the front side of the movable wing plate 4 so that the bottom of the pocket portion 15 is formed. An insertion hole 18 for a fixing bolt 17 for fixing to the door 3 is formed in the wall portion 16, and a cover plate 19 for concealing the fixing bolt 17 is fitted into the pocket portion 15, and a recess portion 28 is formed on the front side of the side bracket body 27. The insertion hole 31 of the fixing bolt 30 to the fixing frame 1 is formed in the bottom wall portion 29 of the recess portion 28, and the shielding plate 32 that hides the fixing bolt 30 is fitted into the recess portion 28 and attached. On the self-closing hinge Te,
A pair of left and right support wall portions 20 and 21 are formed to protrude from the front side of the bottom wall portion 16 of the pocket portion 15,
A screw hole 22 is formed in one support wall portion 20 on the side facing the fixed side blade 2 when the door is closed, and a joining slit 23 is formed in the other support wall portion 21 on the side farther from the fixed side blade plate 2, A bonding projection 24 is formed on one side wall portion 19 a of the cover plate 19, and the other side wall portion 19 of the cover plate 19 is formed.
A receiving hole 25 is formed in b,
A connecting groove portion 33 is formed on the side wall surface portion on one side of the side bracket body 27, a screw hole 34 is formed on the side wall surface portion on the opposite side of the side bracket body 27, and the connecting groove portion is connected to the side wall portion 32 a on one side of the shielding plate 32. A projection 35 is formed, and a receiving hole 36 is formed in the side wall 32b of the shielding plate 32 on the side opposite to the side wall 32a.
The cover plate 19 is fitted into the pocket portion 15 so as to cover the pair of support wall portions 20, 21, the joining protrusion 24 of the cover plate 19 is fitted into the joining slit 23 of the support wall portion 21,
The cover plate 19 is fixed to the movable wing plate 4 by screwing the fixing screw 26 into the screw hole 22 of the support wall portion 20 from the receiving hole 25 of the cover plate 19.
The connecting projection 35 of the shielding plate 32 is fitted into the coupling groove 33 of the side bracket body 27, the shielding plate 32 is fitted into the recess 28 of the side bracket body 27, and the side surface that faces the movable side blade 4 when the door is closed. The fixing-side blade 2 and the shielding plate 32 are screwed into the screw holes 34 of the side bracket body 27 from the through holes 37 of the fixed-side blade 2 formed in the portion and the receiving holes 36 of the shielding plate 32 into the screw holes 34 of the side bracket body 27. It is fixed to the side bracket body 27.

  In the self-closing hinge according to the first aspect of the present invention, the movable side blade plate 4 is abutted against a predetermined position of the door 3 before the cover plate 19 is fitted and attached to the pocket portion 15 of the movable side blade plate 4. The movable wing plate 4 is fastened and fixed to the door 3 by fixing bolts 17 passing through the insertion holes 18 of the bottom wall portion 16, and then the joining protrusions 24 of the cover plate 19 are fitted into the joining slits 23 of the support wall portion 21. After that, the cover plate 19 is fitted and mounted in the pocket portion 15 by screwing the fixing screw 26 into the screw hole 22 of the support wall portion 20 from the receiving hole 25 of the cover plate 19. 22 is formed on the support wall portion 20 that faces the fixed-side blade 2 when the door is closed, so that access to the fixing screw 26 is surely prevented by the side wall surface portion of the fixed-side blade 2 in the close position. To be removed from the movable blade 4 the cover plate 19 in the door closed state, it is impossible to expose the head of the fastening bolt 17 of the movable blade 4.

In the self-closing hinge according to the second aspect of the invention, the movable side wing plate 4 is fixed to the door 3 at a stage before the cover plate 19 is fitted into the pocket portion 15 of the movable side wing plate 4 as in the first aspect of the invention. The movable side wing plate 4 is fastened and fixed to the door 3 by the fixing bolt 17 that is abutted at the position and passes through the insertion hole 18 of the bottom wall portion 16 of the pocket portion 15. The cover plate 19 is fitted into the pocket portion 15 by fitting the fixing screw 26 into the screw hole 22 of the support wall portion 20 from the receiving hole 25 of the cover plate 19 after fitting into the joining slit 23 of the portion 21. However, since the screw hole 22 is formed in the support wall portion 20 that faces the fixed-side blade 2 when the door is closed, the access to the fixing screw 26 is provided on the side wall of the fixed-side blade 2 at the close position. On the face Would be reliably prevented me, removed from the movable blade 4 the cover plate 19 in the door closed state, while it is impossible to expose the head of the fastening bolt 17 of the movable blade 4,
The side bracket body 27 is abutted against a predetermined position of the fixed frame body 1 at a stage before the shielding plate 32 is fitted and attached to the recess portion 28 of the side bracket body 27, and the insertion hole 31 of the bottom wall portion 29 of the recess portion 28 is formed. The side bracket body 27 is fastened and fixed to the fixed frame body 1 by the fixing bolts 30 that pass therethrough, and then the connection projection 35 of the shielding plate 32 is fitted into the connection groove portion 33 of the side bracket body 27, and then the fixed side blade plate 2. Is fixed to the side bracket body 27, and the fixing screw 38 is screwed into the screw hole 34 of the side bracket body 27 from the through hole 37 of the fixed side blade plate 2 and the receiving hole 36 of the shielding plate 32. Since it is formed on the side surface facing the movable side wing plate 4 at the time of closing, access to the fixing screw 38 is reliably prevented by the side surface portion of the movable side wing plate 4 in the close position. It becomes Rukoto, detached from the side bracket member 27 in the door closed state shield plate 32, can not even be exposed to the head of the fastening bolt 30 of the side bracket member 27.

The embodiment shown in FIGS. 1 to 4 relates to the invention of claim 1, and the fixed side blade 2 is directly clamped and fixed to the fixed frame 1 without a side bracket. .
The fixed cam body 6 is manufactured separately from the fixed side blade 2, and is fitted and fixed to the bottom of the vertical shaft hole 5 of the fixed side blade 2 so as not to be relatively rotatable. The fixed cam body 6 and each driven body 8 are made of a plastic material having a high wear resistance. The upper portion of the shaft rod 12 is fixed to the movable side blade 4, and the cam follower 8 is integrally connected to the movable side blade 4. The fixed cam body 6 can be formed integrally with the fixed side blade 2, and the cam follower 8 can also be formed integrally with the shaft rod 12.

  The fixed-side blade 2 is fastened and fixed to the fixed frame 1 by fixing bolts 39 that pass through the three insertion holes 40. Since the fixed cam body 6 is formed with a flat surface portion at the end portion of the cam slope 7 and the cam follower 8 is formed with a flat surface portion at the end portion of the cam slope 9, the flat surface portion of the cam follower 8 is fixed. When the door 3 is additionally rotated to the position where it rides on the flat surface portion of the cam body 6, the door 3 is held in the open position. When the door is closed, the door 3 is pushed by hand, and the flat surface portion of the cam follower 8 is dropped from the flat surface portion of the fixed cam body 6. This initiates automatic closure.

As shown in FIGS. 1 and 4, when the door is closed, the locking protrusion 14 engages with the stopping protrusion 13 at the lower position of the stopping protrusion 13, so that the shaft rod 12 of the cam follower 8 is fixed to the fixed side blade. The movable side blade 4 cannot be separated from the fixed side blade 2 by being extracted from the vertical shaft hole 11 of the second fixed cam body 6.
When the movable blade 4 is spirally rotated by the cooperative action of the cam follower 8 and the fixed cam member 5 and the door 3 reaches a predetermined open position, the locking projection 14 of the movable blade 4 and the fixed blade are fixed. Since the engagement of the plate 2 with the stop projection 13 is released, the shaft 12 of the cam follower 8 is removed from the vertical shaft hole 11 of the fixed cam body 6 as necessary, and the door 3 is fixed to the fixed frame body 1. Can be removed from.

  Two joining protrusions 24 of the cover plate 19 are formed inwardly in a claw plate shape. The restraining projection 13 of the fixed side wing plate 2, the locking projection 14 of the movable side wing plate 4, the joining slit 23 of the movable side wing plate 4, and the screw hole 22 of the movable side wing plate 4 are left and right reversed from the self-closing hinge. It is formed in a pair of left and right so that it can be used as both a right door and a right door. One receiving hole 25 of the cover plate 19 is formed at the center. An insertion hole communicating with the insertion hole 18 is formed in the washer plate 41 abutted against the bottom wall portion 16 of the pocket portion 15.

  The embodiment shown in FIGS. 5 to 8 relates to the invention of claim 2, and the fixed side blade 2 is fixed to the fixed frame body 1 via the side bracket body 27. The rest of the configuration is the same as that of the embodiment shown in FIGS. The fixed side blades 2 are not butted against the fixed frame body 1, and are butted against the side surface portion of the side bracket body 27. As the fixed side blade 2, the same one as the fixed side blade 2 in the embodiment of FIGS. 1 to 4 is used by changing the direction by 90 degrees, and the insertion hole 40 of the fixing bolt 39 in the embodiment is provided. In this embodiment, the fixing hole 38 is inserted into the through hole 37.

  Two connecting projections 35 of the shielding plate 32 are formed inwardly in a claw plate shape. The restraining projection 13 of the fixed side wing plate 2, the locking projection 14 of the movable side wing plate 4, the joining slit 23 of the movable side wing plate 4, and the screw hole 22 of the movable side wing plate 4 are left and right reversed from the self-closing hinge. It is formed in a pair of left and right so that it can be used as both a right door and a right door. Further, three through-holes 37 of the fixed side blade 2 are formed, while six screw holes 34 of the side bracket body 27 are formed. Therefore, the side bracket body 27 is turned upside down and can be used as both a left-hand door and a right-hand door.

It is a front view of the self-closing type hinge which concerns on one Example of invention of Claim 1. It is a top view of the self-closing type hinge of FIG. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a front view of the self-closing type hinge which concerns on one Example of invention of Claim 2. FIG. 6 is a plan view of the self-closing hinge of FIG. 5. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed frame body 2 Fixed side blade 3 Door 4 Movable blade 5 Vertical shaft hole of fixed blade 6 Fixed cam body 7 Cam slope of fixed cam body 8 Cam follower 9 Cam slope of cam follower 10 Vertical of movable side blade Shaft hole 11 Vertical shaft hole of fixed cam body 12 Shaft bar 13 Stop projection 14 Locking projection 15 Pocket part 16 Bottom wall part of pocket part 17 Bolt for fixing the movable side blade 18 Insertion hole 19 Cover plate 20 Support wall of the pocket part Part 21 Support wall part of pocket part 22 Screw hole 23 Slit for joining 24 Protrusion for joining 25 Receiving hole 26 Screw for fixing cover plate 27 Side bracket body 28 Depressed part 29 Bottom wall part of recessed part 30 Adherence of side bracket body Bolt 31 Insertion hole 32 Shielding plate 33 Connecting groove 34 Screw hole 35 Connecting projection 36 Receiving hole 37 Through hole of fixed blade plate 38 Fixing screw

Claims (2)

A fixed side wing plate 2 fixed to the fixed frame 1, a movable side wing plate 4 fixed to the door 3, and a bottom surface of the vertical shaft hole 5 of the fixed side wing plate 2, and a cam slope 7 is formed on the upper surface portion. A cam follower 8 that is pivotally fitted into the fixed cam body 6 and the vertical shaft hole 5 of the fixed side blade 2 and has a cam slope 9 that abuts the cam slope 7 of the fixed cam body 6 on the lower surface portion; A shaft rod 12 that is fixedly penetrated through the center of the body 8, has an upper portion inserted and fixed in the vertical shaft hole 10 of the movable wing plate 4, and a lower portion that is rotatably inserted into the vertical shaft hole 11 of the fixed cam body 6. And consist of
A stop projection 13 is provided on the fixed wing plate 2 and an engagement projection 14 is provided on the movable wing plate 4. When the door is closed, the engagement projection 14 engages with the stop projection 13 at a lower position of the stop projection 13 while the door is opened. The stop protrusion 13 and the stop protrusion 14 are arranged so that the engagement of the stop protrusion 14 and the stop protrusion 13 is sometimes released, and a pocket portion 15 is formed in the front side of the movable wing plate 4 so that the bottom of the pocket portion 15 is formed. Wall 1
6 is a self-closing hinge in which an insertion hole 18 for a fixing bolt 17 to the door 3 is formed and a cover plate 19 for concealing the fixing bolt 17 is fitted into the pocket portion 15 and attached.
A pair of left and right support wall portions 20 and 21 are formed to protrude from the front side of the bottom wall portion 16 of the pocket portion 15,
A screw hole 22 is formed in one support wall portion 20 on the side facing the fixed side blade 2 when the door is closed, and a joining slit 23 is formed in the other support wall portion 21 on the side farther from the fixed side blade plate 2, A bonding projection 24 is formed on one side wall portion 19 a of the cover plate 19, and the other side wall portion 19 of the cover plate 19 is formed.
A receiving hole 25 is formed in b,
The cover plate 19 is fitted into the pocket portion 15 so as to cover the pair of support wall portions 20, 21, the joining protrusion 24 of the cover plate 19 is fitted into the joining slit 23 of the support wall portion 21,
An automatic closing hinge characterized in that the cover plate 19 is fixed to the movable side blade plate 4 by screwing a fixing screw 26 into the screw hole 22 of the support wall portion 20 from the receiving hole 25 of the cover plate 19. A fixed side wing plate 2 fixed to the fixed frame body 1 via the side bracket body 27, a movable side wing plate 4 fixed to the door 3, and a bottom portion of the vertical shaft hole 5 of the fixed side wing plate 2 are provided. On the cam slope 7
And a cam follower 8 that is pivotally fitted in the vertical shaft hole 5 of the fixed side blade 2 and has a cam inclined surface 9 that abuts against the cam inclined surface 7 of the fixed cam body 6 on the lower surface portion. The cam follower 8 is fixed to penetrate through the center of the cam follower 8, and the upper part is inserted and fixed in the vertical shaft hole 10 of the movable side blade 4.
The lower part is composed of a shaft rod 12 inserted into the vertical shaft hole 11 of the fixed cam body 6 so as to be rotatable,
A stop projection 13 is provided on the fixed wing plate 2 and an engagement projection 14 is provided on the movable wing plate 4. When the door is closed, the engagement projection 14 engages with the stop projection 13 at a lower position of the stop projection 13 while the door is opened. The stop protrusion 13 and the stop protrusion 14 are arranged so that the engagement of the stop protrusion 14 and the stop protrusion 13 is sometimes released, and a pocket portion 15 is formed in the front side of the movable wing plate 4 so that the bottom of the pocket portion 15 is formed. Wall 1
6 is formed with an insertion hole 18 for fixing the bolt 17 for fixing to the door 3, and a cover plate 19 for concealing the fixing bolt 17 is fitted into the pocket portion 15 and attached to the front side of the side bracket body 27.
8 is formed, an insertion hole 31 for a fixing bolt 30 to the fixing frame 1 is formed in the bottom wall portion 29 of the recess 28, and a shielding plate 32 for concealing the fixing bolt 30 is fitted into the recess 28. In the self-closing hinge that is designed to be worn,
A pair of left and right support wall portions 20 and 21 are formed to protrude from the front side of the bottom wall portion 16 of the pocket portion 15,
A screw hole 22 is formed in one support wall portion 20 on the side facing the fixed side blade 2 when the door is closed, and a joining slit 23 is formed in the other support wall portion 21 on the side farther from the fixed side blade plate 2, A bonding projection 24 is formed on one side wall portion 19 a of the cover plate 19, and the other side wall portion 19 of the cover plate 19 is formed.
A receiving hole 25 is formed in b,
A connecting groove portion 33 is formed on the side wall surface portion on one side of the side bracket body 27, a screw hole 34 is formed on the side wall surface portion on the opposite side of the side bracket body 27, and the connecting groove portion is connected to the side wall portion 32 a on one side of the shielding plate 32. A projection 35 is formed, and a receiving hole 36 is formed in the side wall 32b of the shielding plate 32 on the side opposite to the side wall 32a.
The cover plate 19 is fitted into the pocket portion 15 so as to cover the pair of support wall portions 20, 21, the joining protrusion 24 of the cover plate 19 is fitted into the joining slit 23 of the support wall portion 21,
The cover plate 19 is fixed to the movable wing plate 4 by screwing the fixing screw 26 into the screw hole 22 of the support wall portion 20 from the receiving hole 25 of the cover plate 19.
The connecting projection 35 of the shielding plate 32 is fitted into the coupling groove 33 of the side bracket body 27, the shielding plate 32 is fitted into the recess 28 of the side bracket body 27, and the side surface that faces the movable side blade 4 when the door is closed. The fixing-side blade 2 and the shielding plate 32 are screwed into the screw holes 34 of the side bracket body 27 from the through holes 37 of the fixed-side blade 2 formed in the portion and the receiving holes 36 of the shielding plate 32 into the screw holes 34 of the side bracket body 27. A self-closing hinge that is fixed to the side bracket body 27.

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