JP2010236186A - Door closer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door closer which is provided in a hinged door-type door, which minimizes the amount of protrusion of a device occupying a door opening space, and which enables a smooth door opening/closing operation to be performed with ease. <P>SOLUTION: This door closer includes: an arm 21 which has an engaging protrusion 21a on a leading end side; an urging means which is connected to the base end side of the arm so as to swing the leading end side of the arm; a body 2 which is equipped with a mooring means for fixing the arm at a predetermined angle and arranged in the upper portion of the door body of the hinged door-type door; and a guide plate 3 for closing, the undersurface of which is provided with a guide groove 31 formed in a predetermined shape and used for undergoing the intrusion and engagement of the engaging protrusion 21a so as to guide the sliding direction of the engaging protrusion 21a with respect to a swing motion made by the urging means and so as to make the door body 4 operate in a closing direction, and which is arranged in the upper portion of the door frame 5 of the door. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a door closer, and more particularly to a door closer for automatically and smoothly performing a closing portion of a closing operation when a hinged door is manually closed.

  For example, as a device that automatically performs the operation of the end portion (near the fully closed position) when manually closing the hinged door, and reduces the impact when the door (door) hits the door frame, for example, Japanese Patent Application Laid-Open No. 2003-2003 As described in Japanese Patent No. 129741, a door closer provided with an urging means for urging two swinging arms and a door body in the closing direction and a buffering means for buffering the momentum in the closing direction is well known. .

  By providing such a door closer on the open door type door, it is possible to prevent the door from being left unopened or the door body from hitting the door frame without having to be carefully closed to the end manually. However, in this type of door closer, the biasing means consisting of a coil spring continues to act from the fully open state where the door is fully opened to the fully closed state, so the door opening and closing operations are compared. It requires a lot of power and sacrifices its operability. In addition, the main body provided with the biasing means and the buffer means and the two swing arms are somewhat bulky, so that the open space when the door is opened is narrowed and the appearance is deteriorated. is there.

  On the other hand, as described in Japanese Patent Application Laid-Open No. 2007-177429, etc., a pin-like drive body provided on the door body side and an engagement body that urges the door body in the closing direction while engaging and pulling the pin-like drive body. The drive body and the engagement body engage only in the vicinity of the fully closed position of the door, and other than this, the engagement is released and the urging force to the door body does not work, and the door is free to open and close. Door closers are also well known.

  In this way, the door frame side drive body and the door body side base are separable, and the drive body and base engagement body engage only before and after the fully closed position of the door to exert a biasing force. Thus, the operability of the manual door opening / closing operation is greatly improved, and the protruding portion in the open space of the door can be kept relatively small.

  However, even if the two swing arms are not required and the casing of the main body is relatively compact, the main body casing is arranged when the door is opened. However, the disadvantage that it is easy to get in the way when moving furniture such as moving is still not solved sufficiently.

  Further, in the structure in which the engagement body that is a hook-shaped part is engaged with the drive body fixed at one point and is biased in the closing direction by the biasing means, The range in which the urging force is applied when the engaging body is engaged is relatively small depending on the size of the bowl-shaped component itself, and a relatively strong urging force is uniformly applied over the entire engaged range. The gap of force required before and after engagement / release becomes too large, and the smoothness of the opening / closing operation tends to be impaired, and the closing speed from the engagement to the end becomes uniform. The point is also a problem.

JP 2003-129741 A Japanese Patent Application Laid-Open No. 2007-177459

  The present invention is intended to solve the above-described problems. For the closer provided in the hinged door, the amount of protrusion of the device in the door opening space is minimized, and a smooth door opening / closing operation is performed. The task is to make it easy.

  Therefore, the present invention includes an arm having an engagement convex portion on the distal end side, an urging means connected to the arm proximal end side to turn the arm distal end side, and a tethering means for fixing the arm at a predetermined angle. The main body disposed on the upper part of the door of the hinged door type door and the engaging convex portion enter and engage to guide the sliding direction of the engaging convex portion with respect to the turning operation by the biasing means. Then, a guide groove of a predetermined shape for operating the door body in the closing direction is provided on the lower surface and a closing guide plate disposed on the door frame upper portion of the door, and the engaging convex portion is A pin-like member protrudes upward from the upper surface of the arm tip side, and the guide groove has an open end with at least one end opened on the side surface of the closing guide plate, and the engagement protrusion extends from the open end. The part is supposed to enter and exit the guide groove, and the doorboard is completely When the arm is opened by a predetermined opening or more from the chain position, the arm is fixed by the anchoring means in a state where the arm is opened at a predetermined angle with respect to the door plate, and the engagement convex portion escapes from the guide groove and the door plate. When the door is manually opened and closed, the engaging projection enters the guide groove and the arm closes to a predetermined angle or less, thereby releasing the anchoring means and closing the arm by the biasing means. However, the engaging convex portion is guided by the guide groove, and the door plate is automatically in the fully closed position.

  As described above, the main body having the biasing means and the anchoring means on the base end side of the arm and the arm is provided on the door plate side, and the door plate is closed by engaging and guiding the engagement convex portion of the arm. While the guide plate is provided on the door frame side so that both can be engaged and separated, the engagement convex portion and the guide groove engage with each other within a predetermined range before and after the fully closed position of the door to attach the door plate in the closing direction. In addition to the fact that the door is free to open and close, the range of disengagement is excellent in operability, and the body with a certain volume is provided on the door side for relatively thin closure As the guide plate is placed on the upper part of the door frame (on the lower side of the upper side), the amount of protrusion in the door release space can be minimized, and the operating range of the door closer can be set according to the length of the arm. It can be set to an appropriate range and the shape of the guide groove Since the guiding direction-stroke) can also be capable of changing set according to the biasing force and speed of the closing direction to the opening of the door leaf, and it can smoothness easily achieved door opening and closing operations.

  Further, in this door closer, the engaging convex portion of the arm has a pin-like member inserted on the base end side in a mounting hole provided on the top surface of the arm tip side to urge the base end side in the protruding direction by elastic means. However, if the tip side can be projected / removed from the mounting hole, sufficient function can be achieved even if the mounting accuracy is not high. In this case, the closing guide plate is provided on the side surface with the open end. When the bypass inclined surface connected from the side surface to the lower surface is formed at a predetermined position, and the engagement convex portion does not enter the open end by the door closing operation, the upper end side of the pin-shaped member abuts on the bypass inclined surface, If it is characterized by climbing the engagement convex part to the lower surface side of the guide plate for closing along this bypass inclined surface while immersing the upper end side, and entering and engaging the guide groove from the side, The arm's engaging projection is aligned with the open end of the closing guide plate. Even mounting accuracy does not match, it is possible to sufficiently exhibit the function as a door closer.

  Further, in the door closer described above, the arm is provided with a pair of engaging projections protruding in the vertical direction from the upper and lower surfaces on the tip side, and the guide groove for closing has the same guide groove on both ends. If it has a pair of open ends that are open on the side and is symmetrical with the guide groove left and right sideways, it can be opened in either direction with a single door closer. Can also be supported.

  Furthermore, in the door closer described above, the main body portion is provided with a buffering means for buffering the pivoting motion of the arm, and is characterized in that it reduces the impact when the doorboard hits the door frame. For example, it is possible to save time and effort for adjusting the force during manual opening and closing operations.

  According to the present invention, the door plate is automatically closed in the vicinity of the door fully closed position by engaging the engagement convex portion on the front end of the main body arm provided on the door plate side with the guide groove of the door closing guide plate on the door frame side. In addition, the amount of protrusion in the door opening space can be minimized, and a smooth opening / closing operation can be easily performed.

(A), (B), (C) is the bottom view which looked at the upper side of the door frame from the lower side for demonstrating the structure of the door closer which is embodiment in this invention, and its operation | movement. (A) is a plan view of the door closer main body of FIG. 1, (B) is a rear view of (A), (C) is a cross-sectional view when the casing of the main body is cut along line XX of (A) . (A), (B) is a horizontal cross section in the attachment state for demonstrating the mechanism in which the main body of FIG. 2 (A) operates. The expanded sectional view cut | disconnected by the surface which follows the YY line | wire of FIG. (A) is a fragmentary sectional view which shows the structure of the engagement convex part of the arm front end side of FIG. 2 (A), (B) is a fragmentary sectional view which shows the application example of the engagement convex part of (A). (A) is an enlarged bottom view for explaining a case where the engaging convex portion enters the guide groove from the bypass inclined surface in the door closer of FIG. 1, (B) is a longitudinal sectional view of (A), (C ) Is a longitudinal sectional view showing a state where the engaging convex portion bypasses the bypass inclined surface and enters the guide groove from the side.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows a state (bottom view) of a door frame 5 (upper side portion) viewed from the lower side for explaining the configuration and operation of the door closer 1 according to the embodiment of the present invention. The door closer 1 is composed of a main body 2 attached to the upper front side of the door body 4 and a closing guide plate 3 attached to the lower side of the upper side of the door frame 5, and only in a predetermined range before and after the fully closed position of the hinged door. A state in which the arm 21 extending from the main body 2 is engaged with the guide groove 31 of the closing guide plate 3 by the engagement convex portion 21a on the distal end side to urge the door 4 in the closing direction and the engagement is released. Then, the door 4 can be opened and closed freely.

  The door closer 1 according to the present invention is common in that the main body 2 and the closing guide plate 3 (driving body) are separated when compared with the conventional door closer described in Patent Document 1 described above. However, because the arm 21 (engagement body) is long, the engagement range is large due to the large turning radius, and the closing guide plate 3 is engaged by the guide groove 31 having a predetermined length with a curved portion. This is different from the door closer of Patent Document 1 which is a pin-shaped member to which the driving body engaged with the engaging body is fixed in that the door 4 is biased in the closing direction while guiding the convex portion 21a. The effect varies greatly depending on the point.

  FIG. 2 is a view for explaining in detail the configuration of the main body 2 of the door closer 1 shown in FIG. 1, and FIG. 2 (A) shows an enlarged plan view of the main body 2, and FIG. ) Is a rear view thereof, and FIG. 2C shows a state in which the casing 22 of the main body 2 is cut along the line XX in FIG.

  As shown in FIGS. 2A and 2B, the main body 2 includes an arm 21 and a mechanism portion 20 having a mechanism for operating the arm 21, and the arm 21 is provided on the upper surface on the distal end side. It has an engaging convex portion 21a made of a pin-like member protruding upward from the mounting hole, and on its proximal end side, a mechanism for urging the distal end side in the turning direction as described later, a mechanism for buffering this, A mechanism for anchoring and fixing the arm 21 at a predetermined angle is provided.

  As shown in FIG. 2 (C), the main body 2 is in a state where the proximal end side of the arm 21 is pivotally supported by a shaft 26 in the casing 22 of the mechanism portion 20, and a coil spring 231 which is a biasing means is provided inside. An operating body 23 made of a rectangular parallelepiped member having a damper 232 serving as a buffer means is provided, and the distal end side of the arm 21 connected to the base end side of the operating body 23 is turned by the operation of the operating body 23.

  That is, a hook-like slide part 23 b is inserted from the opening end side of the hook-shaped base part 23 a constituting the operating body 23, and the slide part 23 b is opened by the operation of the coil spring 231 and the damper 232. It slides so as to protrude and immerse from the end, and the base end side of the arm 21 is connected to the distal end side of the slide portion 23b to form a lever structure in relation to the shaft 26.

  With reference to FIG. 3A showing a cross-sectional view of the state in which the main body 2 is attached to the door plate 4, the casing 22, which is the outer box of the mechanism portion 20 in the main body 2, is a substantially flat plate in which the operating body 23 is built. And a block-like portion in which the base end side of the arm 21 having a height higher than that is inserted through a slit, and wood screws are inserted into the screw holes on both end sides, and the front upper portion of the door plate 4 Is attached.

  Then, on the side where the proximal end side of the arm 21 is inserted, the slide portion 23b of the operating body 23 is engaged with a convex portion 251 provided on the top surface of the distal end side at a position where the slide portion 23b protrudes, and the slide portion 23b is anchored. A hook member 25 is provided as a tethering means, and is connected (engaged) to the slit 236 of the slide portion 23b by a convex portion 21c provided at a position corresponding to the power point of the lever structure on the proximal end side of the arm 21. The pulling force of the coil spring 231 acts on the arm 21, and the angle of the arm 21 with respect to the surface of the door plate 4 is fixed against the pulling force of the coil spring 231 by the anchoring action of the flange member 25.

  Then, by the door closing operation, the engaging convex portion 21a of the arm 21 enters the guide groove 31 of the closing guide plate 3 and is guided, and the tip end side of the arm 21 is turned in the closing direction, thereby sliding with the flange member 25. The engagement of the portion 23b with the convex portion 251 is released, and the slide portion 23b is operated in the direction of immersing into the base portion 23a by the traction force due to the elastic repulsion of the coil spring 231 that is the urging means. The arm 21 to which the end side is connected turns so as to fall toward the door plate 4.

  The operation of the door closer 1 in the present embodiment having the main body 2 that exhibits such a configuration and function will be described in detail with reference to FIG. 1 again. As shown in FIG. When the door plate 4 is manually closed from the opened state and the engagement between the main body 2 and the closing guide plate 3 is released, the door plate 4 is fixed in an open state at a predetermined angle. The arm 21 of the main body 2 has an engagement convex portion 21a on the distal end side that coincides with an open end 31a of a guide groove 31 provided on the lower surface side of the closing guide plate 3 on the door frame 5 side, and guides from the open end 31a. It penetrates into the groove 31.

  Then, as shown in FIG. 1B, the engaging convex portion 21a of the arm 21 passes through the curved portion of the guide groove 31 while engaging with the guide groove 31, and the arm 21 is slightly tilted in the closing direction. While the connection between the flange member 25 and the convex portion 251 that fixed the angle of the arm 21 in the main body 21 is released and the coil spring 231 is biased to close the distal end side of the arm 21 toward the door plate 4, the door plate 4 The door is automatically closed by urging the door in the closing direction.

  Then, as shown in FIG. 1 (C) and FIG. 4 which is a cross-sectional view along the YY line, the door 4 comes into contact with the door stopper 51 on the door frame 5 side, so that the door is in a completely closed position. Even in this fully closed position, the force that urges the door plate 4 in the closing direction continues to act. Further, in the door closer 1 of the present embodiment, since the main body 2 includes the damper 232 as a buffering means, the urging force by the coil spring 231 and the force immediately before the door plate 4 is completely closed by the buffer are buffered. The impact when 4 hits the door frame 5 side is mitigated, and smoothness in the door closing operation is more easily realized.

  Furthermore, the door closer 1 of the present embodiment is such that the engagement convex portion 21a of the arm 21 is guided by a guide groove 31 provided in a predetermined shape and length on the lower surface of the closing guide plate 3. The guide groove 31 is configured so that the vicinity of the opening end 31a substantially coincides with the intrusion angle of the engaging convex portion 21a, and thereafter guides laterally with respect to the intruding angle after being curved. The urging force in the closing direction of the sliding door 4 changes in an inclined manner by the mutual relationship such as the angle of the arm 21 and the distance from the hinge portion of the door body 4.

  That is, the urging force in the closing direction of the door 4 by the arm 21 is the most necessary for the automatic operating force by the door closer 1 since the manual force is weakened after the anchoring means is released by the manual closing operation. The interrelationships are set so as to be strongest in the range and slightly weaker in the vicinity of the door fully closed position.

  As a result, a relatively strong biasing force is generated almost uniformly in the entire range of engagement in the door closer described in Patent Document 2, and a large force is required to start opening the door manually. On the other hand, in the door closer 1 of the present invention, when the door is opened, the door plate 4 starts to open even with a relatively small force, and there is a portion having a strong urging force. Since it can be opened easily by the acceleration force, the door can be manually opened and closed smoothly without excessive force. The adjustment of the urging force applied to the door plate 4 is appropriately performed by designing the length of the guide groove formed on the lower surface of the closing guide plate 3 and the shape of the guide direction according to the length of the arm 21. Can do.

  FIG. 5 (A) shows an enlarged cross-sectional view of the front end side portion from which the engagement convex portion 21a of the arm 21 in the door closer 1 of the present embodiment protrudes. As shown in FIG. The convex portion 21a is inserted in a mounting hole provided at one end of the distal end portion of the lateral T-shaped arm 21 so that the base end side of the pin-shaped member (columnar member) cannot be removed and protrudes from the bottom surface side. The coil spring 210 is arranged so as to be urged in the direction, and the engaging convex portion 21a can be protruded and immersed in the vertical direction, and the tip side thereof is at the bottom of the guide groove 31 of the closing guide plate 3 Even if it abuts, it is easy to enter.

  FIG. 5 (B) shows an arm 22 as an application example of the arm 21 of FIG. 5 (A), and this arm 22 is also engaged with the opposite side (lower side) of the engagement convex portion 21a on the distal end side. Convex portions 21c are provided to form a pair of upper and lower sides. By having such a configuration on the distal end side of the arm 22, as shown in FIG. 1, the shape of the lower surface side including the guide groove 31 is symmetrical with the closing guide plate 3 having the guide groove 31 in the left-right direction. When it is combined with the one that is open, it can be handled as it is regardless of the opening direction of the left and right doors, so it is necessary to prepare two types of products for right opening and left opening This eliminates the hassle and mistakes in designing and ordering, and is advantageous in terms of cost.

  FIG. 6 is a view for explaining the functions of the bypass inclined surfaces 34 and 35 provided on the closing guide plate 3 in the door closer 1 of the present embodiment. As shown in the bottom view of FIG. 6A, the engaging projection 21a of the arm 21 may not enter the open end 31a of the guide groove 31 provided in the closing guide plate 3 by the door closing operation.

  In this case, there are bypass inclined surfaces 34 and 35 connected from the side surfaces to the lower surface at positions close to the open ends 31a and 31b, respectively, so that the peripheral surface of the engaging convex portion 21a slides on the side surface of the closing guide plate 3. However, as shown in FIG. 6B, the engaging convex portion 21a enters the adjacent bypass inclined surface 34, and slides on the bypass inclined surface 34 while immersing the tip end side of the pin-like member, thereby closing the guide plate. After reaching the lower surface of 3, the engaging convex portion 21 a enters and engages with the guide groove 31, and the engaging convex portion 21 on the distal end side of the arm 22 does not collide with the closing guide plate 3.

  For this reason, the bypass inclined surfaces 34 and 35 are provided on the closing guide plate 3, so that the mounting accuracy of the closing guide plate 3 and the main body 2 is not very high, or the positional relationship is shifted by use. Even if this occurs, the door closer 1 can fully perform its function.

  As described above, with respect to the door closer provided in the hinged door type door, according to the present invention, the amount of protrusion of the device in the door opening space can be minimized, and a smooth door opening / closing operation can be easily performed. .

DESCRIPTION OF SYMBOLS 1 Door closer, 2 Main body, 3 Closing guide plate, 4 Door plate, 5 Door frame, 21 and 22 Arm, 21a, 21b Engaging convex part, 21c, 251 Convex part, 25 ridge member, 26 axis | shaft, 31 Guide groove, 31a, 31b Open end, 34, 35 Bypass inclined surface, 210, 211, 231 Coil spring, 232 Damper

Claims (6)

  An arm having an engaging projection on the distal end side, an urging means connected to the proximal end side of the arm and pivoting the distal end side of the arm, and a tethering means for fixing the arm at a predetermined angle. The main body disposed on the upper part of the door body and the engaging convex part enter and engage to guide the sliding direction of the engaging convex part with respect to the turning operation by the urging means. A guide groove having a predetermined shape for operating in the closing direction is provided on a lower surface and a closing guide plate disposed on an upper part of the door frame of the door, and the engagement convex portion is formed from the upper surface on the arm tip side. A pin-shaped member protrudes upward, and the guide groove has an open end at least one end opened on the side surface of the closing guide plate, and the engaging convex portion extends from the open end to the guide groove. The doorboard is supposed to open and exit from the fully closed position. By opening as described above, the arm is fixed by the anchoring means in a state where the arm is opened at a predetermined angle with respect to the door plate, the engagement convex portion escapes from the guide groove, and the door plate is in an open / close free state. When the door is manually closed, the engaging protrusion enters the guide groove and the arm closes to a predetermined angle or less, thereby releasing the anchoring means and closing the arm by the biasing means. Is guided in the guide groove, and the door plate is automatically in the fully closed position.   The engaging convex portion is attached to the distal end side while the pin-like member inserted on the proximal end side in the mounting hole provided on the upper surface on the distal end side of the arm is biased in the protruding direction by the elastic means in the protruding direction. The door closer according to claim 1, wherein the door closer can protrude and immerse from the hole.   In the closing guide plate, a bypass inclined surface connected to the lower surface from the side surface is formed at a predetermined position on the side surface having an open end, and the engagement convex portion does not enter the open end by a door closing operation. When the upper end side of the pin-shaped member is brought into contact with the bypass inclined surface, the engaging convex portion is raised to the lower surface side of the closing guide plate along the bypass inclined surface while immersing the upper end side. The door closer according to claim 2, wherein the guide groove is inserted and engaged from the side.   The arm is provided with a pair of engaging projections protruding in the vertical direction from both the upper and lower surfaces on the front end side, and the closing guide plate has a pair of guide grooves with both ends opened to the same side surface. 4. The door closer according to claim 1, wherein the door closer is left-right symmetric in a state where the guide groove is horizontally and laterally.   The said main-body part is provided with the buffer means for buffering the said turning operation | movement, The shock when the said doorplate contacts the said door frame is relieve | moderated, The claim 1, 2, 3, or 4 characterized by the above-mentioned. The listed door closer.   In the vicinity of the opening end, the guide groove substantially coincides with the intrusion angle of the engaging convex portion, and then curves to guide laterally with respect to the intruding angle. The door closer according to claim 1, 2, 3, 4, or 5, wherein the urging force in the closing direction of the sliding door varies depending on a mutual relationship such as a distance from the hinge portion of the door body.

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