JP5121883B2 - Door steady rest - Google Patents

Description

The present invention relates to a door steady rest device that stops and locks a door that swings on the door end side, such as an open door or a folding door that swings in and out of the doorway even after closing the doorway. .

  Among doors, doors that do not stop when the door end is touched against the door when closing, or folding doors that do not have guide rails on the floor and ceiling upper frame, Beyond the closed position, there is a problem that it is unstable because it swings in and out of the entrance and exits and is not positioned and held in the closed position, and it fluctuates while it is half open.

  Therefore, conventionally, for doors such as hinged doors that do not stop against the door when closed, an anti-sway device is installed between the lower door end of the door and the floor to prevent the door from wobbling. (See Patent Document 1). This conventional retaining device includes, for example, a movable piece provided with a magnet on the lower door end side of the hinged door so that the movable piece can be pivotally supported and protruded from the hinged door. A concave part with a magnetic material is provided on the opposite floor surface part, and when the hinged door reaches the closed position, the movable piece is rotated and projected by the magnetic adsorption force between the magnet and the magnetic substance, and the concave part on the floor side is projected. It has a structure that fits inside to stop the swing of the door.

JP 2000-160911 A

  However, the conventional steady rest device rotates the door-side movable piece with a magnetic attraction force and inserts it into a small recess on the floor side so that the door can be prevented from swinging. A notch is provided on the lower door end side on the door side so that the rotating movable piece always fits accurately into the recess on the floor side, a case is embedded in the notch, and the movable piece is pivoted on the case. A shape that includes a locking surface that is supported by the interior and that is provided with a stopper that restricts the inclination angle of the diagonally downward direction in which the movable piece fits into the recess on the floor side, while the tip of the movable piece that assumes an obliquely downward posture is engaged. In order to form a relatively complicated structure in which a magnetic material is bent and then fitted into a recess on the floor side and fixed, there is a problem that it is cumbersome and troublesome in assembly and processing.

Therefore, in order to solve the above-described problem, the invention described in claim 1 can be rotated around the door frame 10 with the pivot as a fulcrum at the end of the fishing butt, as shown in the embodiment shown below, for example. When the door is closed, the door end on the door frame hits the door frame side when it is closed, and the door end on the door end is a free end. Assembling between the upper side of the door frame 10 and the upper frame 10a of the door frame 10 or between the lower door side of the door and the floor surface F, pulls the door that swings at the closed position where the doorway S is closed, and positions and holds the door in the closed position. In the locking device R , when the fixed adsorbent, for example, the first steady rest A for fixing the magnet 20 on one side of the door or floor F or door frame, and the fixed adsorbent on one side thereof are fixed, When the door is in the closed position, a movable adsorbent, such as a magnet, is placed on the other side facing the fixed adsorbent. Consists of a second bracing member B that vertically movable holding 30 in the height direction of the door, the first bracing member A is positioned protrusions 19a having elasticity periphery is tapered to said fixed adsorbent The second steady rest B is provided with a sound deadening material 27 having elasticity, and the sound deadening material 27 has a round cup shape that can be fitted to the positioning convex portion 19a and has an inner peripheral edge. A tapered positioning recess 32a is provided, which is normally urged by the urging spring 25 together with the movable adsorbent and held at a retracted height position separated from the positioning convex 19a, so that the fixed adsorbent and the movable adsorbent One is made of a magnet and the other is made of a magnetic material, or both are made of magnets. When the door is close to the closed position when closed, the magnetic adsorption force acting between the fixed adsorbent and the movable adsorbent The material moves against the biasing spring 25 And, against said first swing stop body A through the muffling material 27, the fitted the positioning convex portion 19a holds the suction position of the fixed adsorbent and the movable adsorbent into the positioning recess 32a It is characterized by.

  According to the first aspect of the present invention, when the door reaches the closed position and the fixed adsorbent of the first steady rest and the movable adsorbent of the second steady rest face each other, the magnetic attractive force acting between them. As a result, the movable adsorbent of the second steady rest rises or descends, and the movable adsorbent is attracted to the fixed adsorbent of the first steady rest, pulling the door end side of the door, and the door is prevented from shaking. Can be positioned and held in the closed position.

  Moreover, according to the first aspect of the present invention, when the fixed adsorbent of the first steadying member and the movable adsorbent of the second steadying member face each other, the magnetic attractive force acting between them causes the first (2) The relatively simple structure that moves the movable adsorbent of the steady rest and adsorbs it to the fixed adsorbent makes it possible to stop the swing of the door and hold it in the closed position. Processing becomes easy and the cost can be kept low.

Further, according to the first aspect of the present invention, when the movable adsorbent is adsorbed to the fixed adsorbent of the first steady rest to stop the swing of the door when closed, the second steady rest has elasticity. Since the sound deadening material hits the positioning convex portion having elasticity on the first steady rest body in the positioning concave portion, the impact sound can be buffered by the elasticity of the noise deadening material, and the occurrence of the collision noise can be suppressed. With the fitting of the positioning projections, it is possible to accurately hold the door in the closed position while suppressing the deviation of the adsorption position of the movable adsorbent and the fixed adsorbent.

It is a side view which shows the steadying apparatus for doors which is an example of this invention. (A) is the perspective view which shows the folding door structure which assembled | attached the steady rest apparatus for doors between the upper part of the door-end side panel of a folding door, and the upper frame of a door frame in the half open state of a folding door, (B) is the partial expanded perspective view. It is. (A) is a perspective view which shows a folding door structure in the closed state of a folding door, (B) is the partial expansion perspective view. It is a disassembled perspective view which shows a 1st steady rest. It is an assembly perspective view showing the 1st steady rest. It is a disassembled perspective view which shows a 2nd steady rest. It is an assembly perspective view showing the 2nd steady rest. (A-1) is a front view showing the operating state of the door steady rest device when the folding door approaches the closed position, (A-2) is a side view thereof, and (B-1) is the folding door in the closed position. The front view which shows the operating state of the steady rest apparatus for doors, (B-2) is the side view. It is a disassembled perspective view of the 1st steadying body provided in the steadying apparatus for doors which is the other example of this invention. It is an assembly perspective view showing the 1st steady rest object of other examples. It is a disassembled perspective view which shows the 2nd steady rest body of another example. It is an assembly perspective view showing the 2nd steady rest object of other examples. It is a front view which shows the 2nd steady rest body of another example in the assembly | attachment state. (A-1) is a front view showing the operating state of the door steady rest device of another example when the folding door approaches the closed position, (A-2) is a side view thereof, and (B-1) is the folding door closed. The front view which shows the operation state of the other example of the steady rest apparatus for doors in a position, (B-2) is the side view. (A) is the perspective view which shows the hinged door structure of the present invention to the hinged door, and shows the hinged door structure assembled between the door top side of the hinged door and the upper frame of the door frame in the half-open state of the hinged door, (B) ) Is a partially enlarged perspective view thereof. (A) is a perspective view which shows a hinged door structure in the closed state of a hinged door, (B) is the partial expansion perspective view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing a door steadying device as an example of the present invention, and FIG. 2 shows a folding door structure in which a door steadying device is assembled between an upper part of a door side panel of a folding door and an upper frame of a door frame. FIG. 3 is a perspective view showing the folding door structure in a closed state of the folding door. The folding door structure in the illustrated example is a door structure in which the folding door 11 is suspended from the door frame 10 as a door that opens and closes the doorway S surrounded by the door frame 10 on the floor surface F. The door frame 10 has a rectangular frame surrounding the doorway S with an upper frame 10a on the ceiling side and a pair of vertical frames 10b and 10c facing left and right in the figure. The folding door 11 is formed by connecting two panels 15 and 16 via a panel hinge 12 so as to be foldable, and attaching the door-side end of the door-side panel 16 to a vertical frame 10c on one side via a door hinge 14. . Accordingly, the folding door 11 in the illustrated example pivotally pivots on the door frame 10 so as to be pivotable as a whole with the pivot of the door hinge 14 as a fulcrum, and the door-end side panel 15 exceeds the closed position with the pivot P of the panel hinge 12 as a fulcrum. And a door structure that rotates in both the inner and outer directions X of the doorway S.

  In such a folding door structure, the steady rest device R is assembled between the top of the door tip side panel 15 of the folding door 11 and the upper frame 10a of the door frame 10 and is installed on the folding door 11 side. It is comprised with the 2nd steadying body B installed in the door frame 10 side.

  As shown in FIG. 4, the first steady rest A includes an elastic fixed plate 19 made of, for example, a resin material and a fixed adsorbent magnet 20. The fixing plate 19 is formed with a mounting hole 13 in the center and an annular positioning convex portion 19a on the periphery of the mounting hole 13 on the receiving plate surface 14 on one side. The mounting hole 13 is formed as a round hole in accordance with the outer shape of the small disk-shaped magnet 20, but the aperture 13 a on one side in the depth direction (the receiving plate surface 14 side) is formed smaller than the magnet 20. Become. Therefore, the first steady rest A is press-fitted with the magnet 20 into the mounting hole 13 and fixed to the fixing plate 19, and the magnetized surface 20a of the magnet 20 is externally slightly outside the opening 13a as shown in FIG. Assemble to face. Then, the fixing plate 19 is fixed to the upper part of the door-end side panel 15 of the folding door 11 with a set screw 18 with the positioning convex portion 19a facing upward.

  As shown in FIG. 6, the second steady rest B includes a bracket 21 and a magnet unit 22 supported by the bracket 21. The bracket 21 is formed by bending a metal plate at a right angle to form a mounting plate portion 21a and a guide plate portion 21b, and a fitting hole 23 is provided in the guide plate portion 21b. The magnet unit 22 includes a guide shaft 24, an urging spring 25 of a compression coil spring, a spring receiving cap 26, a cup-shaped sound deadening material 27, a magnet holding piece 28, and a movable adsorbing material magnet 30. Become.

  The guide shaft 24 has an annular presser bar 24a at the periphery of one end, and a one-step narrow connecting pipe portion 24b having an internal thread screwed on the inner peripheral surface thereof protruding in the axial direction at the other end. The spring receiving cap 26 has a hat shape in which a retaining collar 26b is provided on the periphery of a small cylindrical spring receiving portion 26a that can be fitted into the fitting hole 23 of the bracket 21, and a guide shaft is provided on the bottom surface of the spring receiving portion 26a. A guide hole 29 through which 24 can be inserted is provided. While the sound deadening material 27 is hard and rich in durability, it is made of, for example, an elastomer having elasticity, and one side thereof is aligned with the annular positioning convex portion 19a provided on the fixing plate 19 of the first steady rest A. It is formed in a round cup shape with a large opening, and a through hole 31 for fitting the connecting pipe portion 24b of the guide shaft 24 is provided on the bottom surface on the other side. Furthermore, the sound deadening material 27 is provided with a taper on the inner peripheral edge of the opening 32 to form a positioning concave portion 32a into which the positioning convex portion 19a of the first steady rest A is fitted. The magnet holding piece 28 is made of a magnetic material such as an iron plate piece, and has a screw insertion hole 34 through which a set screw 33 is inserted. The magnet 30 has a small round cap shape with an opening on one side, and is provided with a screw insertion hole 36 through which a set screw 33 is inserted on the bottom surface on the other side.

  Therefore, the magnet unit 22 has a spring receiving portion 26 a fitted into the fitting hole 23 of the bracket 21, the spring receiving cap 26 is attached to the bracket 21, and the urging spring 25 having one end of the spring inserted into the spring receiving cap 26 is pressed down. The guide shaft 24 is sandwiched between the flange portion 24a and the spring receiving portion 26a and wound around the guide shaft 24. The guide shaft 24 is passed through the guide hole 29, and the connecting tube portion 24b is inserted into the through hole 31 of the silencer 27. 33 is inserted through the magnet 30 and the screw insertion holes 36 and 34 of the magnet holding piece 28 in order, and is screwed into the connecting tube portion 24 b of the guide shaft 24. Then, the magnet unit 22 is assembled to the bracket 21 in a state where the magnet 30 of the movable adsorbing material is attracted to the guide plate portion 21b by the urging force of the urging spring 25 together with the silencer 27 as shown in FIG. In addition, the magnet unit 22 is assembled with the bracket 21 so that the movable adsorbent magnet 30 can be moved in the axial direction through the fitting of the guide shaft 24 and the guide hole 29 together with the silencer 27. The steady rest B is assembled.

  As shown in FIG. 1, the assembled second steady rest B is in a position where the magnet 30 faces the first steady rest A on the door-side panel 15 when the folding door 11 is in the closed position. The mounting plate portion 21a of the bracket 21 is screwed to the upper frame 10a of the door frame 10, and the first steady body A fixed to the upper portion of the door end side panel 15 of the folding door 11 is shaken. A stop device R is configured. Therefore, when the doorway S is opened and the folding door 11 is in the open position, the steady rest device R pulls the movable adsorbent magnet 30 together with the silencer 27 to the guide plate portion 21b by the biasing force of the biasing spring 25. At the retracted height position, the folding door 11 is held up and down freely in the height direction, and when closed, the folding door 11 approaches the closed position and the magnet 20 of the first steadying body A is moved to the second steadying body B. When facing the magnet 30, the movable magnet 30 on the second steadying body B side is lowered against the biasing spring 25 together with the silencer 27 by the magnetic attractive force acting between the magnets 20, 30, and the first deflection The folding door 11 is drawn and attracted to the closed position by being attracted to the fixed adsorbent magnet 20 on the stopper A side.

  Now, in the folding door structure provided with the steady rest device R having the above-described configuration, when opening the doorway S with the folding door 11, for example, holding the bar handle (not shown) and pulling the door-end side panel 15 forward, In any case, as shown in FIG. 2, the door-end side panel 15 rotates about the pivot P of the panel hinge 12 and at the same time the folding door 11 is put through the panel hinge 12. Then, the door-side panel 16 also rotates about the pivot of the door hinge 14 on the side of the one-side vertical frame 10c, and then the folding door 11 is folded and the doorway S is fully opened.

  On the other hand, when closing the doorway S with the folding door 11, when the doorside panel 15 is pulled out to the doorway side in the width direction of the doorway S, the doorside panel 15 is turned in the opposite direction with the pivot P of the panel hinge 12 as a fulcrum. At the same time, the folding door 11 gradually expands from the folded state through the panel hinge 12, and accordingly, the door bottom panel 16 also rotates in the opposite direction with the pivot of the door hinge 14 as a fulcrum. As shown in FIGS. 8A-1 and 8A-2, when the folding door 11 approaches the closed position where the doorway S is closed, the steady rest device R is activated, and the folding door 11 is stopped at the closed position and held. . At that time, when the folding door 11 reaches the closed position and the magnet 20 of the first steadying body A faces the magnet 30 of the second steadying body B, the steadying device R acts magnetically between the magnets 20 and 30. As shown in FIGS. 8 (B-1) and (B-2), the movable magnet 30 of the second steady rest B is lowered together with the silencer 27 against the biasing spring 25 by the attractive force, The movable adsorbent magnet 30 is attracted to the fixed adsorbent magnet 20 of the first steady rest A to attract the door end side of the door end side panel 15, the swing of the door end side panel 15 is stopped, and the folding door 11 is moved. Position and hold in the closed position.

  At this time, in the steady rest device R, the second steady rest B is such that the silencer 27 of the magnet unit 22 is positioned in the positioning recess 32a at the inner periphery of the opening 32, and the positioning projection 19a of the first steady rest A. Therefore, the impact of the sound is suppressed by the elasticity of the silencer 26 to suppress the generation of the collision sound, and the fitting of the positioning concave portion 32a and the positioning convex portion 19a suppresses the deviation of the attracting position of the magnets 20 and 30, thereby allowing the folding door 11 to move. It can be accurately positioned and held in the closed position.

  Therefore, when opening the folding door 11 that is now in the closed position, the magnet 20 of the first steady rest A on the side of the folding door 11 is moved toward the door frame side by pulling the door end side panel 15 toward the front or pushing it inward. 2 The magnetic attraction force does not work between the magnets 20 and 30 by moving from the position where the steady rest B is attracted to the magnet 30, while the magnet 30 is raised together with the silencer 27 by the biasing force of the biasing spring 26. The door-end side panel 15 can be turned back to the retracted height position.

  By the way, in the first illustrated embodiment described above, the first steady rest A having the fixed adsorbent magnet 20 is installed on the folding door 11 side, while the movable adsorbent magnet 30 is provided on the door frame 10 side. Although the second steady rest B is installed, the door steady rest device according to the present invention, on the other hand, has the first steady rest A installed on the door frame 10 side as shown below, for example, and the folding door 11 side. It can also be set as the structure which installs the 2nd steadying body B. In the following second embodiment, the same components as those in the first embodiment will be described with the same reference numerals.

  In the second embodiment, the first steady rest A includes a bracket 21, a mounting plate 39, and a fixed adsorbent magnet 20 as shown in FIG. 9. The mounting plate 39 is made of resin, has a thick disk shape, and has a mounting hole 41 in the center. Therefore, the first steady rest A is assembled so that the magnet 20 is press-fitted into the mounting hole 41 and fixed to the mounting plate 39, and the magnetized surface 20 a of the magnet 20 faces the outside slightly from the opening 16.

  On the other hand, as shown in FIG. 11, the second steady rest B is formed by bending the bracket 35 that supports the magnet unit 22 and bending both ends of a slightly elongated rectangular metal plate into an L shape to form a mounting plate portion 35a. A U-shaped guide plate portion 35b is formed between the plate portion 35a and the fitting hole 23 is provided at the center of the guide plate portion 35b.

  Therefore, the magnet unit 22 presses the biasing spring 25 in which the spring receiving portion 26a is fitted into the fitting hole 23 of the bracket 35, the spring receiving cap 26 is attached to the bracket 21, and one end of the spring is inserted into the spring receiving cap 26. The guide shaft 24 is sandwiched between the flange portion 24a and the spring receiving portion 26a and wound around the guide shaft 24. The guide shaft 24 is passed through the guide hole 29, and the connecting tube portion 24a is inserted into the through hole 31 of the silencer 27. 33 is inserted into the screw insertion holes 36 and 34 of the magnet 30 and the magnet holding piece 28 in order, and is screwed into the connecting pipe portion 24 b of the guide shaft 24. Then, the magnet unit 22 is assembled to the bracket 35 in a state where the magnet 30 of the movable adsorbing material is attracted to the guide plate portion 21b by the urging force of the urging spring 25 together with the silencer 27 as shown in FIG. In addition, the magnet unit 22 is assembled with the bracket 21 so that the movable adsorbent magnet 30 can be moved in the axial direction through the fitting of the guide shaft 24 and the guide hole 29 together with the silencer 27. The steady rest B is assembled.

  The assembled second steady rest B has a concave portion provided on the door-end side on the upper end surface 15a of the door-end side panel 15 of the folding door 11, as shown in FIG. The guide plate portion 35b of the bracket 35 is fitted into 15b, and the mounting plate portion 35a is fixed to the upper end surface 15a with a set screw in a state where the magnet unit 22 is accommodated in the recess 15b. On the other hand, when the folding door 11 is in the closed position, the first steady rest A is a door at a position where the magnet 20 faces the magnet 30 of the second steady rest B on the door end side panel 15 as shown in FIG. The mounting plate portion 21a of the bracket 21 is screwed to the upper frame 10a of the frame 10, so that the steadying device R is configured with the second steadying body B on the folding door 11 side. Therefore, in the other embodiment of the steady rest device R, when the doorway S is opened and the folding door 11 is in the open position, the movable adsorbent magnet 30 and the silencer 26 together with the silencer 26 are urged by the biasing spring 25 to guide the guide plate portion 35b. While the folding door 11 is held up and down in the retracted height position that is drawn to the position, when the folding door 11 is closed, the folding door 11 approaches the closed position and the magnet 30 of the second steadying body B is moved to the first steadying body A. When facing the magnet 20, the movable magnet 30 of the second steady rest B rises against the biasing spring 25 together with the silencer 27 due to the magnetic attractive force acting between the magnets 20 and 30, and the first deflection The folding door 11 is drawn and attracted to the closed position by being attracted to the fixed adsorbent magnet 20 on the stopper A side.

  Accordingly, in the second embodiment, when the doorway S is closed by the folding door 11, the folding door 11 reaches the closed position for closing the doorway S as shown in FIGS. 14 When the magnet 30 of the steady rest B faces the magnet 20 of the first steady rest A, the magnetic attractive force acting between the magnets 20 and 30 causes the magnets 20 and 30 shown in FIGS. As shown, the movable magnet 30 of the second steady rest B rises against the biasing spring 25 together with the silencer 27, and the movable adsorbent magnet 30 is moved to the fixed attractant of the first steady rest A. The door 20 is attracted to the magnet 20 and the door side of the door side panel 15 is drawn, and the swing of the door side panel 15 is stopped and the folding door 11 is positioned and held at the closed position.

  By the way, in the illustrated embodiment described above, the case where the steady rest device R is applied to a folding door that swings beyond the closed position even after the doorway S is closed and is implemented as a steady rest device for that kind of folding door. However, in the present invention, the present invention is not limited to such a type of folding door. For example, as shown below, the present invention is also applied to a hinged door that swings beyond the closed position even after the doorway is closed. Can also be implemented.

  In this third embodiment, as shown in FIGS. 15 and 16, for example, as shown in FIGS. 15 and 16, the steady rest device R has a fixed adsorbent magnet 20 on the door end side upper part of the hinged door 40. The second steady rest B provided with the movable adsorbent magnet 30 while the first steady rest A provided is provided with the magnet 30 as the first steady rest A when the hinged door 40 is in the closed position. It is installed on the upper frame 10a of the door frame 10 at a facing position.

  Therefore, in the third embodiment, when the doorway S is closed by the folding door 11, the hinge door 40 approaches the closed position where the doorway S is closed, and the magnet 20 of the first steadying body A is replaced by the magnet 30 of the second steadying body B. When facing each other, the magnetic attracting force acting between the magnets 20 and 30 lowers the movable adsorbent magnet 30 of the second steady rest body B together with the silencer 27 against the biasing spring 25, and the movable adsorbent The magnet 30 is attracted to the magnet 20 of the fixed adsorbent of the first steady rest A and the door end side of the hinged door 40 is drawn, and the swing of the hinged door 40 is stopped and the hinged door 40 is positioned and held at the closed position.

Furthermore, the anti-sway device of the present invention is not limited to the case where it is installed between the door-side upper part of the door and the upper frame of the door frame, but is installed between the door- side lower part of the door and the floor surface to keep the door steady. It can also be configured. Even in such a case, the steady rest device has a first steady rest provided with a magnet of a fixed adsorbent on the door side, and a second steady rest provided with a magnet of a movable adsorbent on the floor side. Alternatively, on the contrary, the first steady rest can be installed on the floor side and the second steady rest can be installed on the door side.

  In the illustrated embodiment described above, the steady rest device R is formed of the magnets 20 and 30 both of the fixed adsorbent provided in the first steady rest A and the movable adsorbent provided in the second steady rest B. The present invention is not limited to this, and one of them can be formed of a magnet and the other can be formed of a magnetic material such as an iron piece.

A 1st steady body B 2nd steady body F Floor surface R Stabilizer S Entrance / exit 10 Door frame 10a Upper frame 10b / 10c Vertical frame 11 Folding door 19a Positioning convex part 20 Magnet (fixed adsorbent)
25 Biasing spring 27 Silencer 30 Magnet (movable adsorbent)
32a positioning recess 40 hinged door

Claims (1)

The fishing rod is pivotally pivoted around the pivot at the door butt side end of the fishing base, and when the door is closed, the door side end hits the door frame and does not stop and rotates beyond the closed position. The door end is a door with a free end , assembled between the door top upper part of the door and the upper frame of the door frame or between the door door lower part of the door and the floor surface, and the door is closed at the closed position. in steady rest for door positioning and holding in the closed position attracts door side sway,
A first steady rest that fixes a fixed adsorbent on one side of a door, a floor surface, or a door frame, and the fixed adsorbent fixed on one side thereof, the fixed adsorbent when the door is in a closed position. A second steady rest that holds the movable adsorbent in the height direction of the door so as to be movable up and down on the other side facing the material,
The first steady rest has an annular positioning protrusion having a taper at the periphery of the fixed adsorbent, while the second steady rest has an elastic silencer, The sound deadening material has a round cup shape so as to be able to fit with the positioning convex portion, and is provided with a positioning concave portion whose inner peripheral edge is tapered, and is always biased by a biasing spring together with the movable adsorbing material and separated from the positioning convex portion. Hold in the retracted height position ,
One of the fixed adsorbent and the movable adsorbent is formed of a magnet, the other is formed of a magnetic material, or both are formed of magnets, and when the door approaches the closed position when closed, the fixed adsorbent and the movable adsorbent are disposed between the fixed adsorbent and the movable adsorbent. The movable adsorbing material is moved against the biasing spring by the acting magnetic attraction force, is applied to the first anti- rotation body via the silencer, and the positioning convex portion is fitted into the positioning concave portion. A door steadying device, wherein the movable adsorbing material and the fixed adsorbing material are held at their adsorbing positions .

Images