JP2006070686A - Speed adjustment device for sliding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speed adjustment device for a sliding door, which can shut the sliding door at the time of closing, without catching a piston rod in an air cylinder when an air damper including a relatively long piston rod is used. <P>SOLUTION: The speed adjustment device 1a, 1b, 1c for the sliding door 2 is composed in such a way that the sliding door 2 has the air damper 11 and the air damper 11 includes the air cylinder 11c and the piston rod 11b retractable from the air cylinder 11c while an attraction part 10 for contacting a tip end 11a of the piston rod 11b is provided on the door frame. Furthermore, the tip end 11a of the piston rod 11b has a cylindrical magnet while the attraction part 10 has another cylindrical magnet having an almost same diameter and a different magnetism from the said cylindrical magnet, so that connecting surfaces of cylindrical magnets roughly coincide with and contact to each other when closing the sliding door 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sliding door speed adjusting device for closing a sliding door.

  Various sliding door speed control devices have been developed for sliding doors that require safety and noise reduction, and air dampers are used as part of the devices. The air in the air cylinder, which is the outer cylinder of this air damper, is compressed when the sliding door closes, and the speed is reduced by the sliding door receiving the air resistance and decelerating. Improves silence. Patent Document 1 proposes an air damper for a sliding door in which an air cylinder is fixed to the sliding door, and a magnet is provided on at least one of the tip of the piston rod and the door frame that is pulled out from the air cylinder. With this magnet, it is possible to join the tip of the piston rod and the door frame to pull out the piston rod from the air cylinder when the sliding door is opened, and the function as an air damper is continued.

JP 2002-349129 A

  However, in recent years, in places where safety is particularly required, such as hospitals and nursing homes, when an air damper with a short piston rod is used, the moving speed of the sliding door at the beginning of closing is not adjusted, and the elderly and children There was a problem with safety. Therefore, there is a need for a sliding door that can be closed slowly over a relatively long time even if it is opened once, and an air damper that can adjust the closing speed of the sliding door over a long distance, especially with a long piston rod Is required.

  On the other hand, there is a small gap (not shown) between the air cylinder 22 and the piston rod 23 of the conventional air damper 21 shown in FIG. Yes. For this reason, when the air damper 21 having the long piston rod 23 is used, the piston rod 23 tilts due to the lower end of the piston rod 23 being lowered due to the influence of its own weight when the sliding door is opened, and the piston rod 23 and the air cylinder 22 is shifted by a distance A. As a result, when the sliding door is closed and the piston rod 23 is tilted and moved while eliminating the deviation of the distance A, friction due to catching occurs between the piston rod 23 and the air cylinder 22, and the sliding door is difficult to close. There is a problem that it also causes a failure of the device.

  In the case of the air damper of Patent Document 1, as shown in the front sectional view of FIG. 6, the tip of the piston rod 31 has a magnet cover 33 and a magnet 32 provided therein, and is fixed to the piston rod 31 with a set screw 34. ing. For this reason, there is a cavity in the magnet 32, where the magnetic force is weak and the joint surface is not a magnet. Further, if it is sufficient that the attracting piece 41 has a magnetic force enough to pull out the piston rod 31, the attracting piece 41 provided on the bracket 40 is a thin plate, and if it can be attracted to the magnet 32, it is limited to the magnet. Not done. For this reason, the force by which the magnet 32 and the attracting piece 41 are attracted by the magnetic force is weak, and the magnetic flux density is not uniform.

  Here, a case where the magnet 32 of Patent Document 1 is used in the case where the length is the above-described relatively long piston rod will be described. As shown in FIG. 6 (a), the tip of the piston rod 31 and the adsorbing piece 41 immediately before contact with each other are displaced vertically as described above. When the magnet 32 and the attracting piece 41 are instantaneously brought into contact with each other with the center position of the magnet 32 being shifted, a force attracting each other works by the magnetic force, but the magnetic force is weak and the magnetic flux density is uniform in the central portion of the magnet 32. Therefore, it cannot be attracted to the center position as shown in FIG. Therefore, when the sliding door is closed, the piston rod is accommodated in the air cylinder while being tilted, and the piston rod is caught in the air cylinder, so that the sliding door is difficult to close.

  Then, this invention was made in order to solve the above subject, and when using an air damper which has a comparatively long piston rod, when a sliding door closes, a piston rod is stored in an air cylinder without inclining, An object of the present invention is to provide a sliding door speed adjusting device capable of closing the sliding door without the piston rod being caught in the air cylinder.

  In order to solve the above-described problems, the present invention provides an air damper provided in a sliding door, the air damper having an air cylinder and a piston rod that can be projected and retracted from the air cylinder, and abutting against a tip portion of the piston rod. In a sliding door speed control device in which a stopper having an adsorbing portion is provided on the door frame, a cylindrical magnet is provided at the tip of the piston rod, and the adsorbing portion is substantially the same diameter and magnetic as the cylindrical magnet. It is the speed adjustment apparatus of the sliding door characterized by providing the cylindrical magnet from which this differs.

  By adopting such a configuration, the columnar magnet provided at the tip of the piston rod and the columnar magnet provided at the adsorption portion can attract each other with a strong magnetic force, and when closing the sliding door, Even if the positions of the magnets deviate in the vertical direction, the cylindrical magnets have the same diameter, so that the bonded surfaces of the magnets are substantially in contact with each other. For this reason, the displacement of the piston rod can be eliminated, and when the sliding door is closed, the piston rod is accommodated in the air cylinder without tilting, and the piston rod can be closed smoothly without being caught in the air cylinder. it can. Here, the same diameter means that the diameter of the joint surface (circle) of the cylindrical magnet is the same length.

  Further, according to the present invention, an air damper is provided in a door frame, the air damper has an air cylinder and a piston rod that can be retracted and retracted from the air cylinder, and is provided with a suction portion for contacting the tip of the piston rod. In the sliding door speed control device having a portion provided at the sliding door, a cylindrical magnet is provided at the tip of the piston rod, and a cylindrical magnet having substantially the same diameter and different magnetism as the cylindrical magnet is provided at the attracting portion. A speed adjusting device for a sliding door, which is provided.

  By adopting such a configuration, the columnar magnet provided at the adsorption portion and the columnar magnet provided at the tip of the piston rod can attract each other with a strong magnetic force, and when closing the sliding door, Even if the positions of the magnets deviate in the vertical direction, the cylindrical magnets have the same diameter, so that the bonded surfaces of the magnets are substantially in contact with each other. For this reason, a sliding door can be smoothly closed by the same effect, without a piston rod being caught in an air cylinder.

  Here, if the suction portion is provided in the stopper or the fixed portion with a play that can be tilted, even if the piston rod is tilted and the tip portion is shifted downward when the sliding door is closed, the suction portion is Since it has the play which can incline, it becomes easy to join so that the joint surface with the said stopper or the said fixing | fixed part may not shift | deviate. Further, when the piston rod is accommodated in the air cylinder, the position of the adsorption portion can be adjusted by the play of the adsorption portion, and the piston rod is easily accommodated in the air cylinder without causing an axial shift.

  Furthermore, if the tip of the piston rod is provided on the piston rod so as to have a play that can be tilted, the same effect as when the suction part has a play that can be tilted can be obtained. The rod is easy to be accommodated in the air cylinder without causing an axis shift.

  According to the present invention, when the sliding door is closed, the piston rod is accommodated in the air cylinder without being inclined, so that the piston rod can be closed without being caught in the air cylinder.

Hereinafter, the present invention will be described based on the embodiments.
FIG. 1 is a front view showing the movement of a sliding door provided with a speed adjusting device according to an embodiment of the present invention when opened and closed, (a) is in a state where the sliding door is closed, and (b) is in the middle of opening the sliding door or A state in the middle of closing, (c) shows a state in which the sliding door is opened.

  The speed adjusting device 1a in a state when the sliding door 2 is closed will be described with reference to FIG. The sliding door 2 is in contact with the door butt 3a which is a door frame. Above the sliding door 2, a fixed portion 6 to which the wheel 5 is fixed is provided, and the sliding door 2 moves as the wheel 5 rotates on the rail 7. Moreover, the stopper 4 is provided in the upper end of the rail 7, and is being fixed to the door butt 3a (door frame). An air damper 11 is fixed to the fixed portion 6, and a cylindrical magnet (not shown) is provided at the tip end portion 11 a of the air damper 11. Further, the suction portion 10 provided in the stopper 4 is provided with a columnar magnet having a magnetic property different from that of the columnar magnet of the tip portion 11 a, and the tip portion 11 a is joined to the suction portion 10.

  Next, the speed adjusting device 1b when the sliding door 2 is opened will be described. A person who wants to open the sliding door 2 moves the sliding door 2 to the right side of FIG. At this time, the sliding door 2 is opened by rotating the wheel 5 fixed above the sliding door 2. At this time, since the tip portion 11a and the suction portion 10 are joined by magnetic force, the sliding door 2 moves while the piston rod 11b extends from the air cylinder 11c of the air damper 11. Here, the sliding door 2 is not limited to what is opened manually, and may be opened automatically.

  FIG. 1B shows a state in which the length of the piston rod 11b has reached the maximum length. When the sliding door 2 is further opened, the distal end portion 11a and the suction portion 10 are separated from each other. When the sliding door 2 continues to be opened, the piston rod 11b is opened while maintaining its length, and the sliding door 2 is fully opened by abutting against the door tip 3b as shown in the speed adjusting device 1c of FIG. 1 (c). Become. At this time, the tip end portion 11a of the piston rod 11b is affected by gravity and falls downward due to its weight, and the piston rod 11b is tilted.

  When the sliding door 2 is closed, the sliding door 2 is closed while being automatically pulled toward the door butt 3a from the state shown in FIG. At this time, as shown in the speed adjusting device 1b of FIG. 1B, a columnar magnet (not shown) provided at the tip 11a of the piston rod 11b and a columnar magnet (not shown) provided at the suction portion 10 are provided. The tip portion 11a of the piston rod 11b comes into contact with the suction portion 10 by being attracted by the mutual magnetic force. In this case, even if the piston rod 11b is tilted downward and the position of the tip end portion 11a is shifted downward, the attracting forces act on each other, so that the bonded surfaces of the magnets are substantially in contact with each other. For this reason, the inclination of the piston rod 11b can be corrected to eliminate the positional deviation of the tip portion 11a of the piston rod 11b.

  Therefore, when the sliding door 2 is closed, the piston rod 11b is not tilted and is accommodated in the air cylinder 11c, so that the piston rod 11b can be smoothly closed without being caught in the air cylinder 11c. The speed adjusting device 1a of a) is obtained.

  FIG. 2 shows an enlarged cross-sectional view in which the tip end portion 11a of the piston rod is in contact with the suction portion 10. The attracting portion 10 is composed of a magnet cover 12 and a magnet 15 fixed therein. Similarly, the tip portion 11a of the piston rod 11b is composed of a magnet cover 13 and a magnet 16 fixed therein. Here, one of the magnets 15 and 16 is an N pole, and the other of the magnets 15 and 16 is an S pole, and the magnetism is different from each other. The magnets 15 and 16 are permanent magnets and can be used semipermanently.

  The magnets 15 and 16 are substantially the same diameter cylinders, and the diameters B and C of the joint surfaces 15 ′ and 16 ′ are substantially the same, so the areas of the magnet joint surfaces 15 ′ and 16 ′ are substantially the same. For this reason, a uniform magnetic field is formed in a region where the magnet 15 and the magnet 16 face each other immediately before the joining surfaces 15 ′ and 16 ′ come into contact with each other. Accordingly, the magnet 15 and the magnet 16 are bonded so that the bonding surface 15 ′ and the bonding surface 16 ′ do not shift. As a result, the piston rod 11b is accommodated in the air cylinder 11c without causing an axis shift.

  While the tip end portion 11a of the piston rod 11b is separated from the adsorption portion 10, the position is shifted downward due to the influence of the weight, and therefore it is not good if the weight is excessive. For this reason, in order to ensure a uniform strong magnetic force, it is necessary to enlarge the magnet 15 of the adsorption | suction part 10, and it is preferable to enlarge the depth D. FIG. Further, as a relationship between the depths D and E of the magnets 15 and 16, it is desirable that D is E or more. However, the distance D may be approximately equal to the distance E as long as it can exhibit a magnetic force strong enough to eliminate the displacement of the piston rod 11b. In the present embodiment, the depth E is about the same as the thickness F of the piston rod 11b, and the diameters B and C are about twice the thickness F of the piston rod 11b.

  Here, if the diameters of the columnar magnets 15 and 16 are different from each other, the tip end portion 11a and the attracting portion 10 may come into contact with each other while the piston rod 11b is inclined and the tip end portion 11a is shifted downward. It is not preferable because it cannot be corrected. Further, if the magnets 15 and 16 are prisms, the joint surface is displaced when they abut, that is, when the sides of the prism column surface do not coincide with each other at the joint surface, the tip part and the attracting part attract each other. The magnetic force is not uniform, and the deviation between the piston rod 11b and the air cylinder 11c may not be corrected. However, as long as the joining surfaces of the prisms of the tip portion and the adsorption portion are completely coincident with each other and abut, they may be used because the magnetic forces attracting each other become uniform.

  In FIG. 2, a buffer piece can be provided on at least one of the joint surfaces 15 ′ and 16 ′ of the magnets 15 and 16. The buffer piece is preferably made of rubber, and can be expected to have a silencing effect and a breakage prevention effect when the magnets 15 and 16 come into contact with each other. Here, the total thickness of the buffer pieces is preferably about 1 to 2 mm, and if the thickness exceeds 2 mm, the magnetic force attracting each other at the joint surfaces 15 ′ and 16 ′ is weakened by interposing the buffer pieces, and the magnet is liable to be displaced. Therefore, if the thickness is less than 1 mm, effects such as silencing and preventing damage cannot be expected. Further, the material is not limited to this, and may be made of plastic or other materials as long as these effects can be expected.

  Further, in FIG. 2, the suction portion 10 is directly fixed to the stopper 4, but play can also be provided and fixed as shown in FIG. FIG. 3 is a front sectional view showing that the suction portion 10 is provided on the stopper 4a with play. As shown in FIG. 3, the suction portion 10 is fixed to the stopper 4 a with a screw 21 and a nut 22, and the screw 21 is provided with a spring 23. The spring 23 separates the suction portion 10 and the stopper 4a, so that a gap 25 is generated. Further, the stopper 4a is provided with a through hole 24 through which the screw 21 is passed. By making the diameter β of the through hole 24 larger than the thickness α of the screw 21, the through hole 24 and the screw 21 are connected to each other. There is a gap between them. As a result, the screw 21 is movable in the vertical direction or the horizontal direction within a predetermined range, and the above structure functions as play, and the adsorbing portion 10 has a structure provided on the stopper 4a with play that can be tilted. Become.

  As described above, the screw 21 can be inclined with the through hole 24 as a fulcrum within the range of the through hole 24, so that the suction portion 10 moves slightly within the gap 25 with the screw 21 as a support shaft. Can be tilted vertically and horizontally. Here, as the shape of the stopper 4 a, it is desirable that the suction portion 10 is hollow because the suction portion 10 is fixed by the screw 21 and the nut 22.

  According to the above structure, when the sliding door is closed, even if the piston rod 11b is inclined and the tip end portion 11a is shifted downward, the adsorbing portion 10 has a play that can be inclined. It is easy for the magnet 15 and the magnet 16 to be joined so that the surface 16 'does not deviate. Further, when the piston rod 11b is accommodated in the air cylinder 11c, the position of the adsorption portion 10 can be adjusted by the play of the adsorption portion 10, and the piston rod 11b is accommodated in the air cylinder 11c without causing an axis shift. It becomes easy to be done.

  In the present embodiment, the suction portion 10 has a structure that can be tilted, but the tip portion 11a of the piston rod 11b may have a play that can tilt with respect to the piston rod 11b. Thereby, the same effect can be acquired. Furthermore, the same effect can be obtained even if both the suction part 10 and the tip part 11a are provided with play that can be inclined.

Next, another embodiment of the present invention will be described.
FIGS. 4A and 4B are front views showing the movement of the sliding door provided with the speed adjusting device according to another embodiment of the present invention when the sliding door is opened and closed. FIG. 4A is a state where the sliding door is closed, and FIG. A state in the middle or in the middle of closing, (c) shows a state in which the sliding door is opened.

  In FIG. 4A, the speed adjusting device 101a in a state where the sliding door 2 is closed will be described. An air damper 111 is fixed to the door bottom 3a (door frame) by a fixing means (not shown), and a cylindrical magnet (not shown) is provided at the tip 111a of the air damper 111. Further, a fixed portion 6 to which the wheel 5 is fixed is provided above the sliding door 2, and the suction portion 110 is fixed to the fixed portion 6, and the wheel 5 rotates on the rail 7 so that the sliding door 2 is moved. Moving. The adsorption part 110 is provided with a cylindrical magnet having a magnetic property different from that of the cylindrical magnet of the tip part 111a, and the tip part 111a and the adsorption part 110 are joined.

  Next, speed adjusting devices 101b and 101c at the time of opening and closing the sliding door 2 are shown in FIGS. 4B and 4C, and the relationship between the suction portion 110 and the tip portion 111a of the piston rod 111b is as follows. The same as FIG. Therefore, when the sliding door 2 is closed, the sliding door 2 is automatically closed while being pulled toward the door bottom 3a. At this time, a columnar magnet (not shown) provided in the attracting part 110 and a columnar magnet (not shown) provided in the tip part 111a of the piston rod 111b attract each other by the magnetic force, so that the attracting part 110 becomes a piston rod. It abuts on the tip 111a of 111b. In this case, even if the piston rod 111b is inclined downward and the position of the tip end portion 111a is shifted downward, the attracting forces act on each other, so that the bonded surfaces of the magnets are almost in contact with each other. For this reason, the inclination of the piston rod 111b can be corrected to eliminate the positional deviation of the tip end portion 111a of the piston rod 111b. Therefore, when the sliding door 2 is closed, the sliding door 2 can be smoothly closed without the piston rod 111b being caught in the air cylinder 111c.

  Here, like the suction part 10 and the tip part 11a of the piston rod 11b described above, the suction part 110 is provided on the fixed part 6 with a play capable of tilting, or the tip part 111a of the piston rod 111b is attached to the piston rod. 111b may be provided with play that can be tilted. Accordingly, when the sliding door is closed, even if the piston rod 111b is tilted and the tip portion 111a is displaced downward, the suction portion 110 or the tip portion 111a has a play that can be tilted. It becomes easy to join each other's magnets so that the joint surface with part 111a does not shift. Further, when the piston rod 111b is accommodated in the air cylinder 111c, the position of the suction portion 110 can be adjusted by the play of the suction portion 110 or the tip portion 111a, and the piston rod 111b can be operated without causing an axis shift. It becomes easy to be accommodated in the cylinder 111c. Furthermore, the same effect can be obtained even if both the adsorbing part 110 and the tip part 111a are provided with play that can be inclined.

  A plurality of air dampers 11 and 111 may be provided, and durability can be improved by dispersing the impact of the sliding door on the air damper. Moreover, although the case where it applies about what closes a sliding door automatically was shown in the above description, it can apply similarly when it closes manually.

  In the speed adjusting device for the sliding door 2 according to the present invention, when the sliding door 2 is closed, the piston rods 11b and 111b are not tilted and are accommodated in the air cylinders 11c and 111c, so that the piston rods 11b and 111b are in the air cylinders 11c and 111c. The sliding door 2 can be closed without being caught. This makes it possible to use long air dampers 11 and 111 having long piston rods 11b and 111b. Therefore, in places where safety is particularly required, such as hospitals and nursing homes, the speed of the sliding door is adjusted over a long distance to prevent the elderly and children from hitting the sliding door even when walking slowly. Can be safe.

  INDUSTRIAL APPLICABILITY The present invention can be widely used as a speed adjusting device for sliding doors, and is particularly effective when safety is required in places such as hospitals and nursing homes.

It is a front view which shows the movement at the time of opening and closing of the sliding door provided with the speed control apparatus which concerns on embodiment of this invention, (a) is the state in which the sliding door closed, (b) is the state in the middle of opening or in the middle of closing the sliding door (C) is a state where the sliding door is opened. It is an expanded sectional view which shows that the front-end | tip part of a piston rod is contact | abutting to the adsorption | suction part. It is front sectional drawing which shows that the adsorption | suction part was provided in the stopper with play. It is a front view which shows the movement at the time of opening and closing of the sliding door provided with the speed control apparatus which concerns on other embodiment of this invention, (a) is in the state which the sliding door closed, (b) is in the middle of opening or closing the sliding door. (C) shows a state in which the sliding door is open. It is a figure which shows the conventional air damper. It is a figure which shows the conventional air damper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a, 1b, 1c, 101a, 101b, 101c Sliding door speed adjustment device 2 Sliding door 3a Door bottom 3b Door tip 4, 4a Stopper 5 Wheel 6 Fixing part 7 Rail 10, 110 Adsorption part 11, 111 Air damper 11a, 111a Tip part 11b , 111b Piston rod 11c, 111c Air cylinder 12, 13 Magnet cover 15, 16 Magnet 15 ', 16' Joint surface 21 Screw 22 Nut 23 Spring 24 Through hole 25 Clearance A Distance B, C Diameter D, E Depth F of piston rod Thickness α Thread thickness β Diameter of through hole

Claims (5)

An air damper is provided on the sliding door, the air damper has an air cylinder and a piston rod that can be moved in and out of the air cylinder, and a stopper provided with a suction portion for contacting the tip of the piston rod is provided on the door frame. In the sliding door speed control device,
A speed adjusting device for a sliding door, characterized in that a cylindrical magnet is provided at the tip of the piston rod, and a cylindrical magnet having substantially the same diameter and different magnetism as the cylindrical magnet is provided in the attraction portion. .   The sliding door speed adjusting device according to claim 1, wherein the suction portion is provided on the stopper with a slantable play. An air damper is provided on the door frame, and the air damper has an air cylinder and a piston rod that can be projected and retracted from the air cylinder, and a fixed portion having an adsorption portion for contacting the tip of the piston rod is provided on the sliding door. In the sliding door speed control device,
A speed adjusting device for a sliding door, characterized in that a cylindrical magnet is provided at the tip of the piston rod, and a cylindrical magnet having substantially the same diameter and different magnetism as the cylindrical magnet is provided in the attraction portion. .   The speed adjusting device for a sliding door according to claim 3, wherein the adsorbing portion is provided in the fixed portion with play that can be inclined.   The speed adjusting device for a sliding door according to any one of claims 1 to 4, wherein a tip end portion of the piston rod is provided on the piston rod with a slantable play.

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