JP2015010462A - Door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely stop a door so as not to catch fingers therein even when the door is strongly closed, in a closer provided in a hinged door type door.SOLUTION: A retreat chamber is provided in a crossing part between an insertion groove and a locking groove of a guide groove in a closing guide plate, and an inlet of the retreat chamber is provided with a cushioning gate having an elastic body for energizing a gate bar in the guide groove direction by predetermined energizing means from the rear side. When pressing force applied when an engaging projection part intruded into the guide groove abuts on the gate bar of the cushioning gate exceeds energizing force on the gate bar, the gate bar and the engaging projection part are pushed in the retreat chamber direction, and intrusion of the engaging projection part into the locking groove is checked once, and is pushed back by the energizing force of the elastic body when the pressing force of the engaging projection part is absorbed, and a locking projection part is intruded into the locking groove.

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 at the end (near the fully closed position) when manually closing a hinged door, and reduces the impact when the door (door) hits the door frame, for example, Japanese Patent Laid-Open No. 2010-2010 As described in Japanese Patent No. 236186, a door closer provided with a biasing means for biasing the swing arm and the door body in the closing direction and a buffering means for buffering the momentum in the closing direction is well known (FIG. 6). ).

  By providing such a door closer on the door type door, it is possible to prevent the door from being left open or the door body from hitting the door frame without having to close it carefully until the end. Can be closed automatically. However, even with a hinged door installed with such a door closer, if the force of closing the hinged door of the user exceeds the assumption of the installer, sufficient force cannot be buffered. Furthermore, it may lead to injuries such as pinching fingers.

  As a means for preventing such an injury, a method of adjusting a biasing means of a coil spring or a damper built in the door closer can be considered. However, if the assumed closing force is set strongly, the door is completely The biasing means composed of a coil spring and the damper as the buffering means continue to act strongly from the fully open state to the fully closed state, so that the normal door opening / closing operation is relatively large. There is a problem that requires power and sacrifices the operability.

JP 2010-236186 A

  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. Even when the door is strongly closed in the maintained state, it is an object to prevent the finger from being pinched by reliably stopping the door.

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 door body of the hinged 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. The plane formed by the insertion groove and the locking groove for operating the door body in the closing direction is formed by a closing guide plate provided with a horizontally long substantially L-shaped guide groove on the lower surface, The door is automatically moved to the fully closed position by releasing the anchoring means and moving the engaging projection from the insertion groove of the guide groove to the locking groove while turning the arm by the biasing means. The door closer of the hinged door disposed on the door In addition, a retracting chamber is provided at the intersection of the guide groove insertion groove and the locking groove in the closing guide plate, and a gate bar is provided at the entrance of the retracting chamber from the rear side toward the guide groove by a predetermined biasing means. A buffer gate having an elastic body to be urged is disposed, and the pressing force when the engaging convex portion entering the guide groove comes into contact with the gate bar of the buffer gate exceeds the urging force related to the gate bar. In this case, the gate bar and the engaging convex portion are pushed in the direction of the retracting chamber, and once the engaging convex portion enters the locking groove, the pressing force of the engaging convex portion is absorbed. And the buffer gate that is pushed back by the urging force of the elastic body to intrude the locking protrusion into the locking groove, and a sufficient buffering action is obtained by using a coil spring as the elastic body. can get.

  In addition, when the gate bar is pushed toward the retracting chamber by the engaging convex portion, the wall surface in the retracting chamber with which the engaging convex portion abuts is made of an elastic body, thereby ensuring the engagement. The mating convex portion can be stopped and the engagement convex portion can be prevented from being damaged from a collision.

  Further, a bypass inclined surface is provided in the vicinity of the open end of the guide groove provided in the closing guide plate, and an elastic body is disposed below the bypass inclined surface, so that the engagement convex portion of the arm is opened. Even when the guide groove does not enter / engage from the end, the engaging convex portion can pass through the bypass inclined surface while immersing the engaging convex portion into the locking groove in the guide groove. In this case, not only can the mounting accuracy be high, but a sufficient function can be achieved, and by providing the above mechanism, the arm can move before the arm's engaging projection enters the guide groove for some reason. Even in the case of turning, the arm can be automatically restored, so that the function as a door closer can be sufficiently exhibited without removing the door.

  Installed by disposing a retracting chamber at the intersection of the insertion groove and the locking groove of the guide groove in the closing guide plate, and installing a buffer gate capable of buffering the pressing force of the engaging convex part at the inlet part Even when the door is closed with a pressing force that is not assumed by the user, the pressing force can be buffered and absorbed once before the door is closed. It is possible to reliably prevent an accident such as a finger being caught in the door.

According to the embodiment of the present invention, the upper side of the door frame is described from the lower side for explaining the configuration and the operation of the door closer in which the door frame embedded type closing guide plate is combined with the conventional external type main body. Schematic view of the bottom as seen. FIG. 3 is an explanatory diagram of a finger scissor prevention mechanism according to an embodiment of the present invention, wherein A is an operation diagram of the engaging convex portion and the gate when the pressing force for closing the door exceeds the urging force of the coil spring 37. , B is the operation | movement figure of an engagement convex part and a gate when the pressing force which closes a door is less than the urging | biasing force of the coil spring 37. FIG. It is the figure which showed the bypass inclined surface of the guide plate for closure based on embodiment of this invention, (A) is a plane schematic diagram of the guide plate for closure, (B) is the XX direction of a bypass inclined surface. Sectional drawing. The upper piece of the door frame for explaining the configuration and operation of the door closer in which the closing guide plate according to the present invention is combined with the door embedded type main body according to the embodiment of the present invention is viewed from below. FIG. It is the (A) top view in the main part of the door embedded type | mold which is another embodiment of this invention, (B) It is sectional drawing. The bottom face schematic diagram which looked at the upper side of the door frame from the lower side for demonstrating the structure and its operation | movement of the main body of the conventional door door closer, and the guide plate for closure.

  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.

  When the closing guide plate 3 of the door closer 1 according to the present invention is compared with the conventional door closer 1 described in Patent Document 1 described above, the closing guide plate 3 has a predetermined L-shaped plane. Is common in that the door 4 is urged in the closing direction while guiding the engaging protrusion 21a by the guide groove 31 having the length of When the pressure by which 21a pushes the gate bar 35a of the buffer gate 35 exceeds the urging force of the coil spring 37, the gate bar 35a of the buffer gate 35 is pushed into the retracting chamber 38, and the shock buffering wall of the retracting chamber 38 It differs from the door closer 1 of patent document 1 by the point which provided the mechanism which stops the momentum of a door when the said engaging convex part 21a collides with the elastic body 36 in a part. In addition, about the structure of the main body 2 used for embodiment of FIG. 1, the thing of the mechanism similar to what was shown in FIG.2 and FIG.3 of patent document 1 was used.

  FIG. 2 is a schematic diagram illustrating the details of the shock absorbing mechanism in the closing guide plate 3 of the door closer 1, where A represents the case where the pressing force for closing the door exceeds the urging force of the coil spring 37, and FIG. Indicates a case where the pressing force for closing the door is less than the urging force of the coil spring 37.

The closing guide plate 3 according to the embodiment of the present invention includes the retracting chamber 38 at the intersection of the insertion groove 31b and the locking groove 31c in the substantially L-shaped guide groove 31. The buffer gate 35 provided at the entrance is always biased by the coil spring 37 from the retracting chamber 38 toward the guide groove 31, that is, in the direction of closing the retracting chamber 38 by the gate bar 35 a.

  First, referring to FIG. 2A, (1) is an engagement in which the engagement convex portion 21 a of the arm 21 in the main body 2 of the door closer 1 closes the door to the open end 31 a of the guide groove 31 of the closing guide plate 3. A case is shown in which the pressing force of the convex portion 21a enters in a state where the pressing force of the coil spring 37 exceeds the urging force.

In this case, as shown in (2), the engagement convex portion 21a enters the insertion groove 31b and collides with the gate bar 35a with the momentum at which the door is closed. Since the pressing force of the gate bar 35a of the engaging convex portion 21a at this time exceeds the urging force of the coil spring 37,
As shown in the figure, the buffer gate 35 rotates in the direction of the retracting chamber 38 and pushes down the gate bar 35a.

When the gate bar 35a of the buffer gate 35 is pushed down, the engaging convex portion 21a enters the retracting chamber 38 and elastic body 36 provided on the wall of the retracting chamber 38 (in this embodiment, rubber is used). It stops when it collides with the door, and temporarily suppresses the momentum of closing the door. Thereafter, as shown in (3), when the pressing force is absorbed and the urging force of the coil spring 37 starts to work stronger than the pressing force, the gate bar 35a returns to its original state, and the engagement convex portion 21a has a guide groove. It is pushed back into the locking groove 31c at 31.

The arm 21 starts an automatic closing mechanism built in the main body 2 due to the impact of the engaging projection 21a and the gate bar 35a or the arm 21 is moved by a predetermined angle due to the door closing operation. When the engaging convex portion 21a returns to the locking groove 31c in 31, the arm 21 slightly falls in the closing direction while engaging the locking groove 31c, so that the door 4 is attached in the closing direction. The door is automatically closed.

On the other hand, when the pressing force for closing the door is lower than the urging force of the coil spring 37, the engagement convex portion of the arm 21 enters the closing guide plate 3 and then enters the guide groove 31 as shown in B. As shown in (2), the pressing force of the engaging projection does not exceed the biasing force of the coil spring 37 on the gate bar 35a.
5a never falls.

Therefore, while the engaging convex portion 21a engages with the guide groove 31, the plane of the guide groove 31 is substantially L.
The automatic closing mechanism built in the main body 2 starts to work and the door body 4 is urged in the closing direction when the arm 21 is slightly tilted in the closing direction after passing through the curved portion having a predetermined shape. And automatically closes the door.

  In the embodiment of the present invention, the strength of rotation of the gate bar 35a can be adjusted by an adjusting screw (not shown) provided on the opposite side of the coil spring 37 from the buffer gate 35 side.

  Since the strength of the coil spring 37 can be adjusted by the adjusting screw (not shown), it is possible to vary and use the biasing force related to the gate bar 35a that opposes the pressing force of the engaging convex portion 21a. It can be adjusted as appropriate according to the weight of the door and the situation of the user's door operation.

  In the embodiment of the present invention, it is possible to substantially fix the gate bar 35a by maximizing the biasing force of the coil spring 37. By adjusting in this way, the door is halfway every time when the door is closed. It is possible to use a more natural door operation that does not take a long time to stop.

  Next, the function of the bypass inclined surface 34 provided in the closing guide plate 3 in the door closer 1 of the present embodiment will be described with reference to FIG.

  Depending on the closing operation of the door, the engagement convex portion 21a of the arm 21 of the main body 2 may not enter the open end 31a of the guide groove 31 provided in the closing guide plate 3, or some impact may be applied to the arm 21 from the outside. It is conceivable that the arm 21 starts to turn and the arm 21 enters the door 4 side. In this case, by providing the bypass inclined surface 34 connected from the side surface to the lower surface at a position close to the terminal end portion of the guide groove 31, the peripheral surface of the engaging convex portion 21a slides on the side surface of the closing guide plate 3, The engaging convex portion 21 a enters the adjacent bypass inclined surface 34, and a return path for returning the engaging convex portion 21 a to the locking groove 31 c of the guide groove 31 is provided.

  The return path is also provided in Patent Document 1, and its structure slides on the bypass inclined surface 34 while immersing the distal end side of the pin-like member of the engaging convex portion 21 a to the lower surface of the closing guide plate 3. After reaching, the engaging convex portion 21a enters and engages with the guide groove 31. In this configuration, a structure in which a coil spring is built in the engaging convex portion side of the arm 21 (Patent Document 1). , FIG. 5), it is necessary to make the entire engaging convex portion 21a of the arm 21 large, and it is also necessary to enlarge the closing guide plate 3 on the side receiving the engaging convex portion 21a. It was preventing the miniaturization.

Therefore, in the present embodiment, as shown in FIG. 3B, by incorporating a coil spring 39 on the upper side of the bypass inclined surface 34, when the engaging convex portion 21a comes into contact with the bypass inclined surface 34, the engagement is increased. The engaging convex portion 21a pushes the bypass inclined surface 34 so as to be immersed therein, so that the engaging convex portion 21a can be returned to the locking groove 31c of the guide groove 31 over the bypass inclined surface 34.

  Further, by providing the closing guide plate 3 with the bypass inclined surface 34 having the coil spring 39 built in, the mounting accuracy of the closing guide plate 3 and the main body 2 is not very high, or the positional relationship between them depends on use. Even if the shift occurs, the door closer 1 can sufficiently perform its function.

  Since the coil spring 39 is built in the upper side of the bypass inclined surface 34, the coil spring 39 is engaged as compared with the case where the coil spring is built in the distal end portion 21a of the conventional arm 21 (Patent Documents 1 and 5). Since the convex portion 21a can be designed more compactly, the thickness of the closing guide plate 3 for allowing the engaging convex portion 21a to enter can be reduced, and the closing guide plate 3 is installed in the door frame 5. In addition to the need for a notch, the door can be installed using the existing core as it is.

  Next, another embodiment of the main body 2 in the door closer 1 in the embodiment of the present invention will be described.

  First, FIG. 4 is for schematically explaining the configuration of the main body 2 and the closing guide plate 3 in the door closer 1, and FIG. 5 (A) shows a plan view of the main body 2. FIG. 5B is a cross-sectional view in which the casing 22 of the main body 2 in FIG.

  As shown in FIG. 5, 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 protrudes upward from a mounting hole provided on the upper surface on the distal end side. An engaging convex portion 21a made of a roller-like member is provided, and a mechanism for urging the distal end side in a turning direction as described later, a mechanism for buffering this, and an arm 21 at a predetermined angle. Mechanisms for tethering and fixing are respectively arranged.

  Specifically, the main body 2 is pivotally supported by a shaft 22 at the base end side of the arm 21 at a substantially central portion in the longitudinal direction of the mechanism portion 20, and is energized inside the casing 22 on one side across the arm 21. A coil spring 231 as a means, and a damper 232 as a buffer means at a position immediately above the arm 21 across the arm 21 so that the tip 232a of the damper 232 on the arm 21 side and the shaft 26 of the arm 21 are in contact with each other. Touching. In addition, one end of the power transmission piece 241 for transmitting the urging force of the coil spring 231 to the arm 21 is connected to the casing 22, and the other end of the power transmission piece 241 is connected to the arm fixing piece 242 so that the arm The urging force is transmitted to 21.

  Here, in addition to the role of transmitting the urging force of the coil spring 231 to the arm 21, the arm fixing piece 242 causes the arm 21 to rotate counterclockwise as viewed from the direction of FIG. The role of preventing the arm 21 from rotating and the urging force transmitted from the power transmission piece 241 to the arm fixing piece 242 when the arm 21 is positioned at approximately 90 degrees with respect to the longitudinal direction of the main body 2. The arm 21 is locked in a state protruding from the side surface of the main body by being transmitted to the square shaft 26 of the arm 21 at a predetermined angle.

When the door 21 moves in the closing direction with the arm 21 protruding, the arm 21 is rotated by the impact of the engagement convex portion 21a at the tip of the arm 21 coming into contact with the open end 31a of the closing guide plate 3. The power transmission piece 241 and the arm fixing piece 242 are unlocked.

When the locking is released, a force in the clockwise direction acts on the arm 21 by the urging force of the coil spring 231, so that the engagement convex portion 21 a at the tip of the arm 21 is formed as shown in FIG. The door 4 is automatically moved in the closing direction of the door frame 5 while moving the guide groove 31 as shown in FIG.

The rotational speed of the arm 21 at this time is adjusted by the buffering action of the damper 232 disposed to face the coil spring 231. Of course, when the closing force of the door 4 is strong, the engaging convex portion 21a that has entered the guide groove 31 of the closing guide plate 3 pushes the buffer gate 35 shown in FIG. The momentum is then adjusted in advance.
Note that the force for urging the door 4 in the closing direction continues to act even in the fully closed position of FIG.

  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 biasing force in the closing direction of the door body 4 changes in an inclined manner depending on the relationship between the angle of the arm 21 and the distance from the hinge portion (not shown) 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.

  In the door closer 1 of the present invention, at the beginning of opening the door, the door 4 starts to open even with a relatively small force, and the portion with strong urging force can be easily opened by the acceleration force. Too much momentum and manual door opening and closing can be performed very smoothly. The adjustment of the urging force applied to the door body 4 is appropriately performed by designing the length of the guide groove formed in the lower surface of the closing guide plate 3 according to the length of the arm 21 and the shape of the guide direction. be able to.

  And by making it the structure of the door closer 1 which concerns on this Embodiment, it enables it to store the main body 2 in 20-30 mm from the door upper part which is the thickness of the core material of a general door body. Because the existing core material can be used, there is no need for processing to reinforce the core material, and it is necessary to provide the door body 4 with a large notch that was conventionally required when installing this type of door closer. In addition, when the door is completed, it is possible to provide a clean door in which the door closer 1 hardly protrudes from the outside. Moreover, since the main body 2 in the embodiment of the present invention can be switched between the right hand and the left hand by removing the shaft 22 of the arm 21 and assembling from the opposite side of the upper and lower surfaces of the main body, the arm 21 is assembled. It is possible to easily store the right hand and the left hand on the main body 2 according to the ordering status and the stock status.

  DESCRIPTION OF SYMBOLS 1 Door closer, 2 Main body, 20 Mechanism part, 21 Arm, 21a Engagement convex part, 22 Axis, 3 Closing guide plate, 31 Guide groove, 31a Open end, 31b Insertion groove, 31c Locking groove, 34 Bypass inclined surface , 35 Buffer gate, 35a Gate bar, 36 Elastic body, 37 Coil spring, 38 Retraction chamber, 39 Coil spring, 4 Door body, 5 Door frame, 231 Coil spring, 232 Damper, 232a Damper tip, 241 Power transmission piece, 242 Arm fixing piece

Claims (7)

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 in the door body 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 and close the door body. The flat surface formed by intersecting the insertion groove and the locking groove for operating in the direction comprises a guide plate for closing provided with a horizontally elongated guide groove on the lower surface, and the anchoring means is released. The door in which the door is automatically moved to the fully closed position by moving the engagement convex portion from the insertion groove of the guide groove to the locking groove while turning the arm by the biasing means. In the door closer of the hinged door arranged in
A retracting chamber is provided at the intersection of the insertion groove and the locking groove of the guide groove in the closing guide plate, and a gate bar is provided at the entrance of the retracting chamber from the rear side by a predetermined biasing means. A buffer gate having an elastic body that biases in the direction is disposed, and the pressing force when the engaging convex portion that has entered the guide groove comes into contact with the gate bar of the buffer gate generates a biasing force related to the gate bar. When it exceeds, the gate bar and the engaging convex portion are pushed in the direction of the retracting chamber and the engagement convex portion is temporarily prevented from entering the locking groove, and the pressing force of the engaging convex portion is reduced. The door closer comprising the buffer gate that is pushed back by the urging force of the elastic body when absorbed to allow the locking projection to enter the locking groove.   The door closer according to claim 1, wherein a coil spring is used as the elastic body.   The wall surface in the retracting chamber with which the engaging convex portion abuts when the gate bar is pushed in the retracting chamber direction by the engaging convex portion is constituted by an elastic body. The door closer according to 2.   The door closer according to claim 3, wherein the elastic body disposed on the wall surface is a rubber body.   The door closer according to claim 1, 2, 3, or 4, wherein the closing guide plate can be built in a door frame and does not require a notch when installed.   By providing a bypass inclined surface in the vicinity of the open end of the guide groove provided in the closing guide plate, and disposing an elastic body above the bypass inclined surface, the engagement convex portion of the arm is opened. Even when the arm pivots before entering and engaging the end, and is positioned substantially parallel to the door, and the engaging convex portion does not enter the guide groove, the engaging convex portion is the bypass. The door closer according to claim 1, 2, 3, 4 or 5, wherein the engaging convex portion can enter the locking groove in the guide groove by overcoming the inclined surface while immersing it. .   The door closer according to claim 6, wherein the elastic body provided above the bypass inclined surface is a coil spring.