JP4838082B2 - Door closer - Google Patents

Description

  The present invention relates to a door closer that automatically closes door plates such as folding doors and hinged doors.

  The door closer is an auxiliary device having a function of automatically closing a door plate such as a folding door or a hinged door, that is, a closing door function. A recent door closer does not simply close the door plate automatically, but has a function of slowly closing the door plate, that is, a “buffer function for closing the door plate (hereinafter abbreviated as a buffer function)”. Desired. As a result, the door plate does not close suddenly, and the safety of the door plate that attempts to close automatically is ensured. Further, recent door closers have a function of keeping the door panel open when the door panel is opened to a certain degree of opening, that is, a “maintenance function of the opened door panel (hereinafter abbreviated as maintenance function)”. Desired. The doorboard closes automatically no matter how open it is because it is inconvenient when trying to put in and out of luggage with the doorboard open.

  The door closer (automatic closing device) of Patent Document 1 uses a torsion coil spring (torsion spring) to close a door plate (door) via a link that is pivotally attached to an automatic closing mechanism that realizes a closing function. It is the structure biased in the direction. This door closer incorporates a guide rod that moves forward and backward in accordance with the posture of the link in a closer body (guide) attached to an opening of a building. The buffering function is realized by the tip of the guide rod moving forward according to the change in the posture of the link caused by closing the door plate pulling the tension spring (the tension spring). The maintenance function is realized by engaging the stopper piece attached to the rear end of the guide rod with a stopper device that is separately fixed to the closer body when the guide rod retracts according to the change in the link posture caused by the door plate opening. ing.

  Similarly to Patent Document 1, the door closer (automatic closing device) of Patent Document 2 uses a torsion coil spring (torsion spring) to provide a door plate via a link pivotally attached at one end to an automatic door mechanism that realizes a closing function. The door is biased in the closing direction. The buffer function is different in that it is realized by using a damper member instead of the torsion coil spring (torsion spring) used in Patent Document 1. The damper member opposes the tensile force of the torsion coil spring (torsion spring) due to the resistance when oil flows in and out through the piston. Further, the maintenance function is realized by the engagement of the stopper movable body and the stopper fixed body similar to Patent Document 1. In addition, Patent Document 2 discloses a door closer in which a closer body (guide) is attached to a door plate and a link extending from the closer body is pivotally attached to an opening of a building.

JP 09-177425 A ([0013] to [0027], [FIG. 1] and [FIG. 2]) JP-A-10-131602 ([0012], [0032], [FIG. 1], [FIG. 3], [FIG. 4] and [FIG. 11])

  In the door closers of Patent Document 1 and Patent Document 2, both ends of the link are pivotally attached to an automatic closing mechanism that realizes a closing function, and the other end of the link is attached to a closer body that realizes a buffer function and a maintenance function. It is the structure which is axially attached. For this reason, the door closer of patent document 1 and patent document 2 requires the process which assembles the closer main body which implement | achieves a closing mechanism, a buffer function, and a maintenance function to a doorplate or an opening part for both the said doorplate and an opening part. This particularly hinders the degree of freedom in construction, and causes a problem that requires labor and labor for installing the door closer. From this, the door closer has a structure that can be easily retrofitted to the door plate and the opening, preferably the closing function is realized in the closer main body together with the closing function, the buffer function and the maintenance function, and one end of the link is attached to one of the door plate or the opening It is desirable to have a simple configuration in which the closer main body, which is directly attached to the shaft and the other end of the link is attached, is simply attached to the other side of the door plate or the remaining opening.

  Further, the door closer of Patent Document 1 realizes a maintenance function by engaging the stopper piece and the stopper device, and the door closer of Patent Document 2 realizes the maintenance function by engaging the stopper movable body and the stopper fixed body. The maintenance function based on the engagement is merely to maintain the door plate at a specific opening, and the opening of the door cannot be arbitrarily set. Certainly, it can be considered that it is sufficient to maintain the doorboard at a specific opening, but with such a maintenance function, for example, when the opened doorboard is pushed a little, the door closing function works immediately and the doorboard starts to close. It is inconvenient. From this, it is desirable that the door closer functions when the door plate is opened at a certain degree of opening or more. For example, it is desirable to have a configuration that realizes a maintenance function in which the door closing function does not work immediately even when the fully opened door plate is pressed a little. .

  In addition, in recent years, there has been an increasing demand to install door closers on narrow folding doors and hinged doors, but it is difficult to install closers on the opening side where folding doors are installed. It is not preferable that the closer body is large. From now on, it is possible to attach to the door plate of narrow folding doors and hinged doors while realizing the closing function, cushioning function and maintenance function in the closer body. It is desirable to construct a closer body (which can be attached to either).

  Therefore, in the door closer, (1) the closer main body is combined with a closing function, a buffer function and a maintenance function, one end of the link is directly attached to one of the door plate or the opening, and the other end of the link is A simple construction that only requires attaching the closed closer body to the remaining one of the door plate or the opening. (2) It functions when the door plate is opened at a certain degree of opening or more. A structure that realizes a maintenance function that does not immediately function even when pressed, and (3) a folding door that is still narrow while realizing a closing function, a buffer function, and a maintenance function in the closer body. As a challenge, we investigated the construction of a small and highly flexible closer that can be attached to door panels such as doors.

  As a result of the study, it is composed of a slewing bearing that pivotally mounts one end of the link so as to be pivotable horizontally, and a closer body that pivotally pivots and pivotally supports the other end of the link. The closer body is in a fully closed state of the door plate. A link slider that is movable between the track start end where the other end of the link is located and the track end where the other end of the link is positioned in the fully open state of the door plate, and an interlocking slider that is movable in conjunction with the link slider. The link slider is pivotally attached to the other end of the link and is movable between the track start end and the track end according to the other end of the link that rotates horizontally according to the opening and closing of the door plate. A link lever that swings toward the slider is provided, and the link lever is urged toward the track start end along a regulation guide that regulates the swing away from the link slider. The link slider forms a notch for connection toward the connection lever, and the restriction guide is released toward the connection lever at a position close to the track start end side from the track end of the link slider. A connection notch is formed, and the connecting lever is controlled by swinging in a direction approaching the link slider and by engaging in a connecting engagement portion engaging with the connection notch of the link slider and moving away from the link slider. We have developed a door closer with a retracting engagement part that engages with the guide notch.

  Here, the “trajectory start end” that defines the movement range of the link slider is the link travel end corresponding to the position where the door plate fits in the opening and does not close further in the closing direction. It means the moving end of the link corresponding to a position that does not open further in the opening direction. The case constituting the closer body may be at least as long as the distance connecting the track start end and track end of the link slider. For example, the caps attached to both ends of the case of the closer main body that contacts the link slider or the interlocking slider that interlocks with the link slider and restricts the movement of the link slider need only be separated from the distance connecting the track start end and track end. . Further, since the interlock slider is fixed in position by engaging the release engaging portion of the connecting lever with the release notch of the restriction guide, the movement range is narrower than that of the link slider, and the link slider starts from the track start end of the link slider. Move within the range of fixed positions. The link slider is movable independently from the position fixed position to the end of the track after the interlocking slider is fixed in position and the connection engaging portion of the connection lever is detached from the connection notch. At this time, if the movable link slider presses the connecting lever other than the connecting notch in the moving range so as to restrict the swinging of the connecting lever, the connecting lever is also swung freely by vibration or the like. The fixed slider position can be maintained without moving. The link slider is restricted by the link slider by extending the track slider's track start end side to hold the link lever, or conversely, forming a connecting engagement portion having a size that covers the range in which the link slider moves independently. .

  The door closer according to the present invention is a closer main body in which one end of a link is pivotally attached to one of the door plate and the opening, and the other end of the link is pivotally attached to be horizontally pivotable and movable. Is attached to the other remaining door plate or opening. As will be described later, the door closer of the present invention is a small size that can be attached to a door plate such as a narrow folding door or a hinged door while realizing a closing function, a buffer function and a maintenance function in the closer body. Since the closer main body having a high degree of attachment freedom can be configured, the closer main body can also be attached to the door plate (solution of the problem (3)). In this case, specifically, the swivel bearing is screwed to the opening, and the closer body is screwed to the upper part of the back surface of the door plate. This means that the door closer of the present invention has a configuration that can be easily retrofitted, and the labor and labor required for installing the door closer are reduced (solution of the problem (1)).

  In the door closer according to the present invention, when the link slider starts to open from the fully closed state where the link slider is at the track start end, the connecting lever whose swing in the direction away from the link slider is restricted by the restricting guide links the connecting engaging portion. The link slider and the interlocking slider are integrally moved toward the end of the track against the bias of the interlocking slider while being engaged with the connecting notch of the slider and horizontally turning the other end of the link. The biasing of the interlocking slider is, for example, by a compression spring interposed between the interlocking slider and the end of the closer main body on the track end side. When the connecting lever reaches the release notch of the restricting guide, the connecting lever is swung away from the link slider to disengage the connecting engagement portion from the link notch of the link slider, and the release notch The retracting engaging portion is engaged with the interlock slider to fix the position against the bias. The link slider can be freely moved in a range from the position of the interlocking slider whose position is fixed to the end of the track. Thereby, it functions when the door plate is opened at a certain opening or more, and for example, a maintenance function is realized in which the door closing function is not immediately activated even when the fully opened door plate is pressed a little (solution of problem (2)).

  In the door closer according to the present invention, when the door slider starts to be closed from the fully open state where the link slider is at the end of the track, the link slider is moved toward the end of the track while horizontally rotating the other end of the link. Then, the link slider abuts on the connecting lever and swings the connecting lever in a direction approaching the link slider to disengage the retracting engaging portion from the release notch of the restriction guide, and the connecting engaging portion is connected to the link. When engaged with the connecting notch of the slider, the link slider and the interlocking slider can be integrally moved to the track start end according to the biasing of the interlocking slider. As described above, the door closer according to the present invention is configured such that when the interlocking slider urged toward the track start end side exhibits a closing door function and the connection with the interlocking slider via the connecting lever is released, A link slider that can move freely up to and including the maintenance function.

  To swing the connecting lever and engage the release engaging part with the release notch of the regulation guide, the connecting lever is urged away from the link slider toward the release notch or pushed by the link slider. In addition, a link slider, an interlocking slider, and a regulation guide are stacked in the order described above from the top, and the connecting lever is swung according to gravity. On the other hand, the link slider is tangent to the swinging track drawn by the pressed portion of the connecting lever in order to securely engage the connecting engaging portion with the connecting notch of the link slider again by swinging the connecting lever. A pressing member may be provided projecting in the direction. The pressing member is preferably a compression spring. Since the link slider moves linearly while the link lever swings, simply pressing the appropriate part of the link slider against the link lever does not cause the link lever to swing toward the link slider. There may occur a case where the joint portion does not sufficiently engage with the connection notch. The pressing member protruding from the link slider toward the tangential direction of the swinging track drawn by the pressed part of the connecting lever converts the linear movement of the link slider into the tangential direction of the swinging track drawn by the pressed part of the connecting lever. Thus, it has a function of reliably swinging the connecting lever toward the link slider. The pressing member made of a compression spring has a function of preventing a sudden swing of the connecting lever due to the pressing of the connecting lever.

  The interlocking slider projects a cylinder on the end of the track and urges it toward the start of the track by inserting a compression spring between the cylinder and the end of the closer on the end of the track. A piston attached to a rod extending through the interlocking slider from the track start end side may be inserted into the cylinder. The compression spring biases the interlocking slider toward the track start end side through the cylinder. The cylinder moves relative to the piston in accordance with the interlocking slider, and suppresses the movement of the cylinder by allowing air to flow in and out through the gap between the piston and the cylinder, so that the rapid movement of the interlocking slider by the compression spring is prevented. To prevent. As a result, the movement of the link slider connected to the interlocking slider becomes slow, and the link that moves horizontally by the movement of the link slider is also restricted. As a result, sudden opening and closing of the door plate can be suppressed. Thus, the present invention realizes a buffer function of the door board (solution of problem (1) and problem (3)).

  The interlocking slider externally fits a movable spring receiver to the cylinder, a pair of compressions between the spring receiver and the end of the closer body at the end of the track, and between the spring receiver and the interlocking slider that projects the cylinder. It is more preferable that the spring is biased toward the track start end side by interposing springs. The compression spring that realizes the closed door function has a large compressibility, the center portion swells, the direction of load generation tends to deviate from the axial direction, is easily decentered, and the load is easily applied and is easily damaged. Therefore, the range of movement of the interlock slider is divided by a movable spring receiver that is externally fitted to the cylinder, and a compression spring corresponding to each of the divided ranges is used in a pair of relations, thereby reducing the amount of compression of each compression spring. As a result of suppressing the expansion of the central portion of each compression spring and reducing the gap for avoiding interference with the cylinder and other components, a closer main body with a high degree of freedom of mounting can be configured (solution for problem (3)). ).

  As described above, the door closer of the present invention (1) allows the closer main body to realize a closing function, a buffer function and a maintenance function, and one end of the link is directly attached to one of the door plate or the opening, The closer body with the other end of the link pivoted is simply attached to the door plate or the other remaining opening, and (2) functions when the door plate is opened at a certain opening or more. For example, a structure that realizes a maintenance function in which the door closing function does not work immediately even when the fully opened door panel is pressed a little, and (3) while realizing a closing function, a buffer function and a maintenance function in the closer body. In addition, the present invention solves the respective problems by configuring a closer body that is small and can be attached to a door plate such as a narrow folding door or a hinged door and has a high degree of freedom of attachment.

  By solving the problem (1), the door closer according to the present invention provides a degree of freedom in construction that can be easily retrofitted, and an effect of reducing labor and labor for installing the door closer can be obtained. In addition, by solving the problem (2), play is ensured until the closing function works on the opened doorboard, and the maintenance function is more stably exhibited within the range of the play. It is done. And by solving the problem of (3), a closer main body can be attached now to a narrow doorboard, and the effect which raises the freedom degree of construction in a problem (1) more can be acquired.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an outer set type folding door 6 using a stationary side door plate 61 to which a door closer is attached, FIG. 2 is a plan view showing a state in which the folding door 6 is opened, and FIG. 3 is an attachment of the door closer to the folding door 6. 4 is an exploded perspective view of the closer body 2, FIG. 5 is a partially exploded perspective view of the closer body 2, FIG. 6 is a plan view of the closer body 2 with the folding door 6 closed, and FIG. 6 is a cross-sectional view of the closer body 2 taken along line CC in FIG. 6 when the folding door 6 is closed, FIG. 8 is a sectional view taken along line DD of FIG. 7 of the closer body 2 when the folding door 6 is closed, and FIG. FIG. 10 is a cross-sectional view of the closer body 2 taken along the line AA in FIG. 9 when the folding door 6 is opened, and FIG. 11 is a sectional view of the closer body 2 when the folding door 6 is being closed. It is a plan view Figure 12 is a diagram 11 in section B-B of closer main body 2 in the middle of the closed state of the folding door 6 Te.

  As shown in FIGS. 1 and 2, the door closer of this example is configured with respect to the fixed side door 61 of the outer set type folding door 6 composed of a fixed side door 61 and a moving side door 62 connected in a bending relationship. is doing. The fixed door 61 is pivotally attached to one side edge 71 of the opening 7 by means of hinge members 5 provided at two upper and lower positions. For example, when the door closer of this example starts to close from the state where the folding door 6 is opened (see FIG. 2) by operating the moving side door 61, the stationary side door 61 is automatically turned horizontally in the closing direction, and the fixed side The movable door 6 connected to the door 61 is also turned horizontally to automatically close the folding door 6 as a whole.

  The moving door plate 62 is configured to move along the guide rail 8 by moving the horizontally swingable moving guide 4 to the guide rail 8 attached to the upper edge (not shown) of the opening 7 so as to move. It turns horizontally while being guided by the guide 4. The guide rail 8 is made of a C-type channel material having an opening 82 sandwiched between a pair of vertical flanges 81, 81, and is attached to the upper edge of the opening 7 with the opening 82 facing downward. The moving guide 4 provided on the moving side door plate 62 engages the guide groove 41 with one of the flanges 81 from below. As described above, the folding door 6 of the present example is configured so that the fixed side door 61 is horizontally swiveled around the hinge member 5 while the hinge member 5 integrally supports the fixed side door 61 and the moving side door 62 in a cantilevered manner. The door plate 62 is opened and closed by horizontally turning it while being guided by the guide rail 8 according to the movement guide 4.

  As shown in FIG. 3, the door closer includes a closer body 2 that is fixed to the back side of the fixed door 61 with screws, a swing bearing 11 that is fixed to the flange 81 of the guide rail 8, the closer body 2, and the swing bearing 11. It is comprised from the link 1 spanned between. The slewing bearing 11 is fixed to a positioning member 83 (see FIGS. 1 and 2) attached to the inside of the flange 81 of the guide rail 8 by screwing. One end of the link 1 is inserted from the lower surface side of the slewing bearing 11 and is pivotally attached, and the other end is inserted from the upper surface side into the mounting hole 211 of the link slider 21 that appears on the upper surface of the closer body 2 and is axially attached. Yes. When the folding door 6 is opened and closed, the link 1 moves the link slider 21 pivotally attached to the other end along the longitudinal direction of the closer body 2 while turning horizontally with respect to both the swing bearing 11 and the closer body 2. .

  As shown in FIGS. 4 and 5, the closer body 2 includes a casing 22 attached to the fixed side door plate 61, a track starting end where the other end of the link 1 is positioned in the door plate fully closed state, and a link 1 in the door plate fully open state. A link slider 21 that is movable between the end of the track where the other end is located and an interlocking slider 26 that is movable in conjunction with the link slider 21 are provided. The turning trajectory drawn by the other end of the link 1 is restricted because one end of the link 1 is attached to the turning bearing 11. For this reason, the track start end and track end of the link slider 21 determined by the turning track drawn by the other end of the link 1 can be set regardless of the structure of the casing 22. In this example, as will be described later, fitting blocks 241 and 251 are fitted to both ends of the casing 22, and the position where the interlocking slider 26 connected to the link slider 21 contacts the fitting block 241 of the start end side cap 24 is set to the link slider. 21 is the track start end, and the position where the link slider 21 contacts the fitting block 251 of the end cap 25 is the track end.

  The link slider 21 and the interlocking slider 26 are in a vertical relationship, and the link slider 21 appears from the upper surface of the casing 22, but the interlocking slider 26 is hidden in the casing 22. The casing 22 is made of a C-shaped channel member having a rectangular cross section with its upper surface and both ends in the extending direction open, and guide pieces 221 and 221 facing the upper edges of the left and right side surfaces, respectively, and engagements facing the inner sides of the side surfaces. Convex ridges 222 and 222 are provided. The guide pieces 221 and 221 constitute a track for engaging engagement grooves 212 and 212 provided on both side surfaces of the link slider 21. The engaging ridges 222 and 222 engage the engaging grooves 231 and 231 provided on both side surfaces of the regulation guide 23 that constitutes the track of the interlocking slider 26, as well as the cap grooves 242 and 242 provided on both side surfaces of the start end side cap 24. Cap concave grooves 252 and 252 provided on both side surfaces of the end side cap 25 are engaged.

  The start end side cap 24 is provided with cap concave grooves 242 and 242 on the side surface of the fitting block 241 fitted into the open end of the casing 22, and further provided with pin holes 243 communicating with the connecting holes 224 and 224 of the casing 22 between the side surfaces. Yes. The end-side cap 25 is also provided with cap concave grooves 252 and 252 and pin holes 253 in the fitting block 251 similarly to the start-end side cap 24. The start end cap 24 and the end cap 25 are fixed to the casing 22 by spring pins 223 and 223 inserted into the pin holes 243 and 253 from the connection holes 224 and 224 of the casing 22, respectively. The regulation guide 23 is sandwiched between the start end side cap 24 and the end end side cap 25 and is fixed in position inside the casing 22.

  The link slider 21 is composed of a substantially rectangular parallelepiped resin block, has an attachment hole 211 for axially attaching the other end of the link 1 on the upper surface, and engaging grooves 212 and 212 extending in the moving direction on both side surfaces, and a connection notch on the lower surface. Each of 214 is formed, and a pressing member 213 made of a compression spring protrudes from the front surface (right side in FIG. 4) on the track start end side. The pressing member 213 protrudes slightly upward so as to coincide with the tangential direction of the swinging track drawn by the pressed protrusion 273 (pressed portion) of the connecting lever 27 described later. The link slider 21 is not restricted in movement other than being affected by the bias of the interlocking slider 26 when it is connected to the interlocking slider 26 biased toward the track start end side via the connecting lever 27. First, as described above, the link slider 21 has the interlocking slider 26 in contact with the fitting block 241 of the starting end cap 24 that closes one end of the casing 22, and the fitting block of the end cap 25 that closes the other end of the casing 22. It can move within the range where it contacts 251.

  The interlocking slider 26 is made of a resin block having an I-shaped cross section provided with concave grooves 261 and 261 that are largely recessed on the side surface, and the connecting lever 27 is moved up and down on the track end side of the upper block 262 corresponding to the upper half across the concave groove 261. It is pivotally attached so that it can swing in the direction. The interlocking slider 26 moves along a regulation guide 23 built in the casing 22. The regulation guide 23 is configured to track a pair of clamping rails 232 and 232 that regulate the swinging of the connecting lever 27 pivotally attached to the interlocking slider 26 in the direction away from the link slider 21 from the substantially rectangular parallelepiped stopper block 234 that contacts the terminal cap 25. It extends in parallel toward the start side. The restriction guide 23 of this example is provided with a release notch 233 at the boundary with the stopper block 234 that is the end of the holding rails 232 and 232. Then, the regulation guide 23 of the present example engages the engagement grooves 231 and 231 formed on the side surface with the engagement protrusions 222 and 222 formed in the casing 22, and closes both ends of the casing 22, the start end side cap 24 and the terminal end. The position is fixed between the side caps 25.

  The interlocking slider 26 moves in a state in which the side grooves 261 and 261 are fitted to the holding rails 232 and 232 of the regulation guide 23 and are held by the holding rails 232 and 232. The interlocking slider 26 of this example inserts the end portion on the track start end side into the insertion hole 263 provided in the lower block 266 corresponding to the lower half across the concave groove 261, and the cylinder 28 fixed by the knock pins 264, 264 on the track end side. It protrudes toward. The cylinder 28 of this example has a movable spring receiver 283 fitted on the outside, and the start end between the spring receiver 283 and the lower block 266 of the interlocking slider 26, and between the spring receiver 283 and the terminal cap 25, respectively. A side compression spring 284 and a terminal side compression spring 285 are interposed (see FIG. 4). The interlocking slider 26 is constantly urged toward the track starting end side by receiving the repulsive force of the starting end side compression spring 284 and the terminal end side compression spring 285 on the lower block 266.

  Further, the cylinder 28 of this example is closed at the end of the track end with a cap 281 fixed with a knock pin 282, and through the through hole 265 communicating with the insertion hole 263 of the lower block 266, the end of the track from the start end side cap 24. A rod 244 that protrudes toward the side is inserted, and an inner surface is slidably contacted with a piston 245 attached to the tip of the rod 244 to close the track start end side. A space between the cap 281 and the piston 245 of the cylinder 28 is a substantially sealed space communicating with the outside as long as air flows in and out through the gap between the piston 245 and the cylinder 28. In this way, the cylinder 28 that moves together with the interlocking cylinder 26 compresses the air in the space between the cap 281 and the piston 245 while allowing air to flow in and out through the gap between the piston 245 and the cylinder 28, thereby causing the cylinder 28 to start its track. Is prevented, and the sudden movement of the interlocking slider 26 by the start end side compression spring 284 and the end side compression spring 285 is prevented (realization of a buffer function).

  The connecting lever 27 is provided with a connecting engaging portion 271 at the upper end of the tip, similarly with a releasing engaging portion 272 at the lower end of the tip, and with a pressed projection 273 to be a pressing target portion of the pressing member 213 of the link slider 21 on the upper surface. It consists of a plastic lever member. The coupling engaging portion 271 has a substantially trapezoidal shape in side view following the sectional shape of the coupling notch 214 of the link slider 21, and the releasing engagement portion 272 follows the sectional shape of the releasing notch 233 provided in the restriction guide 23. The two are formed in an integral block shape having a width that can be bridged between the holding rails 232 and 232 of the restriction guide 23, that is, a width of the restriction guide 23. As a result, the connecting lever 27 moves in a range other than the release notch 233 while bringing the release engaging portion 272 into sliding contact with the upper surfaces of the holding rails 232 and 232 of the restriction guide 23, and in a direction away from the link slider 21. Oscillation is restricted.

  The function of the door closer of this example will be described in accordance with opening and closing of the folding door 6. As shown in FIGS. 1 and 6 to 8, the door closer in the fully closed state of the folding door 6 has the most acute posture with respect to the fixed side door plate 61 when the link 1 is pushed by the fixed side door plate 61. The link slider 21 is located at the track start end of the closer body 2. When the folding door 6 is fully closed, the retracting engaging portion 272 is placed on the holding rails 232 and 232 of the restricting guide 23, and the connecting lever 27 whose swinging in the direction away from the link slider 21 is restricted is engaged. The part 271 is engaged with a connection notch 214 provided on the link slider 21. That is, since the link slider 21 and the interlocking slider 26 are in a state of moving together, the interlocking slider 26 in the fully closed state of the folding door 6 is positioned integrally with the link slider 21 in the vicinity of the track start end. This interlocking slider 26 is pushed to the track start end side by the start end side compression spring 284 and end end side compression spring 285, and in this example, the movement of the folding door 6 is restricted by being pressed against the start end side cap 24. The closed state is kept stable.

  When the folding door 6 in the fully closed state begins to open, the fixed side door plate 61 starts to turn horizontally around the hinge member 5, and the link 1 also turns horizontally around the turning bearing 11 in response to the horizontal turning of the fixed side door plate 61. At first, the link slider 21 pivotally attached to the other end of the link 1 starts to move toward the end of the track together with the interlocking slider 26 integrated by the connecting lever 27. During the movement of the link slider 21 and the interlocking slider 26, the release engaging portion 272 is placed on the holding rails 232, 232 in a range where the release engaging portion 272 of the connecting lever 27 is on the holding rails 232, 232 of the regulation guide 23. Since the swinging of the connecting lever 27 in the direction away from the link slider 21 continues to be restricted, the connection between the link slider 21 and the interlocking slider 26 is not released.

  Here, the interlocking slider 26 is urged toward the track start end side by the start end side compression spring 284 and the terminal end side compression spring 285, and in addition to the piston 245 relatively fixed in position according to the interlocking slider 26. Since resistance due to inflow and outflow of air in the moving cylinder 28 is added, rapid movement is suppressed. The suppression of the movement with respect to the interlocking slider 26 also appears as a buffering function in the direction of opening the stationary door 61 by suppressing the horizontal turning of the link 1 via the link slider 21 integrated with the interlocking slider 26.

  In this example, the increase / decrease in the air in the cylinder 28 against the urging of the start side compression spring 284 and the end side compression spring 285 relies only on the inflow / outflow by the gap between the piston 245 and the cylinder 28. In addition to providing an air circulation hole in the vicinity of the cap 281 of 28, and providing an air circulation hole penetrating in the extending direction of the cylinder 28 in the piston 245 itself, the air in the cylinder 28 can be quickly flowed in and out. Further, the urging force by the start side compression spring 284 and the end side compression spring 285 is increased, and the folding door 6 can be closed quickly. Conversely, if the air inflow hole is not provided and the gap between the piston 245 and the cylinder 28 is made denser, the inflow and outflow of air in the cylinder 28 is suppressed, and the start side compression spring 284 and the end side compression spring 285 are relatively moved. It is possible to close the folding door 6 more slowly by weakening the urging force. In addition, the opening / closing speed of the folding door 6 can also be adjusted by increasing or decreasing the urging force by increasing or decreasing the repulsive force of the start side compression spring 284 and the end side compression spring 285.

  When the fixed door 61 reaches a predetermined opening (for example, approximately 85 degrees), the engagement for releasing the connecting lever 27 that is pivotally attached to the interlocking slider 26 that has moved together with the link slider 21 toward the end of the track The portion 272 reaches the release notch 233 of the regulation guide 23, and as shown in FIGS. 2, 9, and 10, the release engaging portion 272 engages with the release notch 233, and the connecting lever 27 is linked. The connecting lever 27 removes the connecting engaging portion 271 from the connecting notch 214 of the link slider 21 and releases the connection between the link slider 21 and the interlocking slider 26. In a state where the link slider 21 and the interlock slider 26 are disconnected, the interlock slider 26 urged toward the track start end side by the start end side compression spring 284 and the end end side compression spring 285 is the engagement lever for releasing the connection lever 27. The link slider 21 that is fixed in position by engaging the joint portion 272 with the release notch 233 of the restriction guide 23 and that releases the connection with the interlocking slider 26 can be moved independently.

  In a range in which the link slider 21 can move, that is, in a range in which the folding door 6 reaches a predetermined opening degree or more and then reaches a fully open state, the connecting lever 27 swings away from the link slider 21 and the link slider 21 Since the coupling engaging portion 271 is retracted downward so as not to engage with the coupling notch 214, the closing function does not work even if a slight force is applied to the folding door 6, and the folding door 6 remains open. A maintenance function is realized. Further, the link slider 21 of the present example is such that the rear end is always positioned on the coupling engaging portion 271 of the coupling lever 27 in a state where the front end is in contact with the fitting block 251 of the termination side cap 25 corresponding to the end of the track. (See FIG. 6). As a result, even when a large vibration is applied to the folding door 6 with the link slider 21 being movable independently, the link slider 21 presses the coupling engaging portion 271 to restrict the swing of the coupling lever 27 and release it. Only the interlocking slider 26 whose position is fixed via the connecting lever 27 is prevented from returning to the track start end side so that the engagement portion 272 does not come off from the release notch 233. The range in which the link slider 21 is movable is approximately the stopper block 234 of the restriction guide 23 from the position where the release engaging portion 272 of the connecting lever 27 is engaged with the release notch 233 of the restriction guide 23 to the end of the track. Half the length. The fixed door 61 is not automatically closed within a range in which the link slider 21 is movable, and can maintain an open state (realization of a maintenance function).

  When the folding door 6 in the fully open state starts to close, the link slider 21 starts to move toward the track start end in accordance with the horizontal turning of the link 1 as seen in FIGS. As described above, since the link slider 21 and the interlocking slider 26 are disconnected in the range where the folding door 6 reaches the fully-closed state after reaching the predetermined opening degree or more, only the link slider 21 is connected to the link 1. The interlocking slider 26 is fixed at a position closer to the track start end side from the movable link slider 21. When the link slider 21 approaches the connecting lever 27 pivotally attached to the interlocking slider 26, the connecting lever 27 swings away from the link slider 21, and the release engaging portion 272 is moved to the release notch 233 of the restriction guide 23. Since the coupling engaging portion 271 is retracted downward in the engaged state, the leading end of the link slider 21 does not interfere with the coupling engaging portion 271 in the coupling notch 214. The pressing member 213 protruding from the link slider 21 comes into contact with the pressed protrusion 273 of the connecting lever 27 and starts to swing so as to push up the connecting lever 27 via the pressed protrusion 273.

  The pressing member 213 of this example uses a compression spring that compresses (elastically deforms). The connecting lever 27 can also be pushed up if any part of the link slider 21 abuts. However, for example, at the moment when the rigid pressing portion abuts against the pressed protrusion 273 of the connecting lever 27, the pressed protrusion 273 is once jumped and the engaging lever 27 is pushed up suddenly, and the connecting lever 27 of the link slider 21 is connected to the connecting notch 214. There is a possibility that the coupling engaging portion 271 cannot be engaged well. Even if the engagement can be successfully performed, the engagement with the connection notch 214 of the connection engaging portion 271 caused by the collision between the pressed portion and the pressed protrusion 273 or the sudden swing of the engagement lever 27 is possible. This produces an impact sound and is not preferable. When the pressing member 213 of this example contacts the pressed protrusion 273 of the connecting lever 27, the pressed protrusion 214 is compressed without jumping and the connecting lever 27 is slowly pushed up. This prevents the occurrence of a collision sound and ensures that the connecting engaging portion 271 of the swinging connecting lever 27 is reliably and smoothly engaged with the connecting notch 214 of the link slider 21. In addition, the pressing member 213 formed of a compression spring absorbs a limit of dimensional accuracy between the connection notch 214 of the link slider 21 and the connection engagement portion 271 of the connection lever 27 and a shift in the engagement relationship due to deterioration over time. It also has a function of guaranteeing a reliable engagement of the coupling engaging portion 271 with the coupling notch 214.

  When the connecting engaging portion 271 of the connecting lever 27 is completely engaged with the connecting notch 214 of the link slider 21, the link slider 21 and the interlocking slider 26 are connected again, and the connecting lever 27 is released. The part 272 completely disengages from the release notch 233 of the restriction guide 23 and makes the interlocking slider 26 movable again. As a result, the link slider 21 moves toward the track start end side according to the interlocking slider 26 biased toward the track start end side by the start end side compression spring 284 and the end end side compression spring 285, and the link 1 is horizontally swiveled and fixed. The side door plate 61 is automatically closed (realization of the closing door function). The fixed-side door 61 closes the folding door 6 because the above-described biasing by the start-end side compression spring 284 and the end-side compression spring 285 opposes the resistance caused by the inflow and outflow of air in the cylinder 28 formed by the piston 245. Even when the start side compression spring 284 and the end side compression spring 285 having a sufficiently strong force are used, the folding door 6 does not close suddenly.

It is a top view of the outer set type folding door using the stationary side doorplate which attached the door closer. It is a top view showing the state which opened the folding door. It is a perspective view showing the attachment state with respect to the folding door of a door closer. It is a disassembled perspective view of a closer body. It is a partial exploded perspective view of a closer body. It is a top view of a closer body in the state where a folding door was closed. It is CC sectional drawing in FIG. 6 of the closer main body in the state which closed the folding door. It is DD sectional drawing in FIG. 7 of the closer main body in the state which closed the folding door. It is a top view of a closer body in the state where a folding door was opened. FIG. 10 is a cross-sectional view taken along the line AA in FIG. 9 of the closer body with the folding door open. It is a top view of the closer body in the state in the middle of closing a folding door. FIG. 12 is a cross-sectional view taken along the line BB in FIG. 11 of the closer body in a state where the folding door is being closed.

Explanation of symbols

1 link
11 Slewing bearing 2 Closer body
21 Link slider
213 Press member
214 Notch for connection
22 Casing
23 Regulatory Guide
233 Notch for release
24 Start-side cap
241 Mating block
244 Rod
245 piston
25 End cap
251 Mating block
26 Interlocking slider
262 Upper block
266 Lower block
27 Connecting lever
271 Engagement part for connection
272 Retraction engaging part
273 Pressed protrusion
28 cylinders
283 spring holder
284 Start side compression spring
285 End side compression spring 4 Movement guide 5 Hinge member 6 Folding door
61 Fixed side panel
62 Moving side doorboard 7 Opening 8 Guide rail

Claims (4)

It consists of a swivel bearing that pivotally mounts one end of the link so that it can pivot horizontally, and a closer body that pivotally mounts the other end of the link so that it can pivot and move horizontally. A link slider that is movable between the track start end where the link is located, the track end where the other end of the link is positioned in the fully open state of the door plate, and a link slider that is movable in conjunction with the link slider. The slider is pivotally attached to the other end of the link, and is movable between the track start end and the track end according to the other end of the link that rotates horizontally according to the opening and closing of the door plate, and the interlocking slider faces the link slider. A connecting lever that swings is provided, and the connecting lever is urged toward the track start end side along a regulation guide that restricts swinging away from the link slider, and interlocked with the link slider. The link slider forms a notch for connection toward the connection lever, and the regulation guide forms a notch for release toward the connection lever at a position near the track start end side from the track end of the link slider. The connecting lever swings in the direction approaching the link slider to engage with the connecting notch for connecting the link slider, and moves away from the link slider to release the restriction guide. A door closer having a retracting engaging portion that engages with a notch. The door closer according to claim 1, wherein the link slider has a pressing member projecting in a tangential direction of the swinging track drawn by the pressed portion of the connecting lever. The interlocking slider projects a cylinder toward the end of the track and urges it toward the start of the track by interposing a compression spring between the cylinder and the end of the closer body at the end of the track. The door closer according to claim 1, wherein a piston attached to a rod extending through the interlocking slider from the track starting end side of the main body is inserted into the cylinder. The interlocking slider externally fits a movable spring receiver to the cylinder, a pair of compressions between the spring receiver and the end of the closer body at the end of the track, and between the spring receiver and the interlocking slider that projects the cylinder. The door closer according to claim 3, wherein the door closer is biased toward the track start end side by interposing springs.

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