JP5035093B2 - Door closer - Google Patents

Description

  The present invention relates to a door closer used for automatically and quietly closing a hinged door body.

  When the door body of the hinged door is opened from a predetermined opening angle, it can be freely operated in the opening and closing direction, and when the door body is within the predetermined opening angle, a braking force is applied and the closing direction is urged. As a door closer that can automatically close the door body quietly, a piston with a rack engraved inside is repelled by a spring and a pinion that meshes with the rack is pivotally supported and filled with hydraulic oil. Fixing the cylinder to the door body, fixing a bracket having a guide groove for engaging and disengaging a roller pivotally supported at the tip of the arm to the upper frame, attaching the base end of the arm to the pinion shaft, When the door is opened, the piston is set so that the arm can rotate while compressing the spring (see, for example, Patent Document 1), a rotational viscosity filled with a viscous fluid. A device main body that supports an arm rotatably around a shaft rod to which a damper (buffer mechanism) is attached is attached to the door body, and when the door body is closed and reaches a predetermined opening angle, it engages with the guide groove of the arm. A pin is attached to the upper frame, and before the engagement, the arm is held at a predetermined angular position, and after the engagement, a spring for urging the arm in the closing direction of the door body is built in the apparatus body. (For example, refer to Patent Document 2).

Japanese Utility Model Publication No. 56-65074 (Fig. 1-3) JP 2007-120140 A (FIGS. 1-2 and 4-6)

In a door closer that uses a hydraulic damper to apply a braking force and quietly close the door body as in Patent Document 1 and uses a spring to apply an urging force to automatically close the door body, a rack is engraved on the piston. And a special structure in which a shaft, a pinion, a spring, and the like are installed in the cylinder, which increases costs and reduces maintainability.
In addition, it is necessary to increase the capacity of the hydraulic damper so that the hydraulic damper is constituted by the piston and cylinder having a special structure as described above, and the door can be closed quietly even if the door is closed with force. Therefore, the outer shape of the door closer body (cylinder) attached to the door body is increased.
Therefore, since a relatively large structure attached to the upper part of the door body is visible, including the exposure of a relatively long arm, there is a sense of foreign matter and pressure, lacking smartness and poor appearance. In particular, it is not suitable for use in ordinary houses.

Moreover, in the door closer that uses a rotary viscous damper to apply a braking force and quietly close the door body as in Patent Document 2 and uses a spring to automatically close the door body by applying a biasing force, Since it is a structure which uses a type | formula viscous damper, the full length of a door closer main body (apparatus main body) can be comprised comparatively short.
However, since it is necessary to increase the capacity of the rotary viscous damper so that it can be closed quietly even if the door body is closed forcefully, the outer diameter of the rotary viscous damper increases. (Especially the outer shape around the shaft supporting the arm) becomes large.
Therefore, a relatively large structure attached to the upper part of the door body protrudes in the horizontal direction, and this is visually recognized. It is not suitable for.

  Therefore, in view of the above-mentioned situation, the present invention is to solve the problem that the simple structure has high assemblability and maintainability, can reduce costs, and has a smart appearance that does not give a sense of foreign matter or pressure. The present invention is to provide a door closer suitable for use in a general household.

  In order to solve the above problems, the door closer according to the present invention can freely operate the door body in the opening / closing direction in a state where the door body is opened with respect to the frame of the hinged door at a predetermined opening angle. When the body is within the predetermined opening angle, the door body is quietly automatically closed because braking force is applied and biased in the closing direction, and the frame body and the upper part of the door body A main body attached to one of them, a drive member attached to the other of them, a swing damper attached to the main body and protruding from a vertical axis, and attached to the vertical axis of the swing damper, with the vertical axis as the center The swing arm extending in the radial direction and swinging integrally with the vertical shaft, and the open side portion of the base end portion is supported by the vertical support shaft at the tip of the swing arm and extending in the radial direction. , Before the swing arm A brake pad that is swingable in the closing direction around the vertical support shaft and has an inner peripheral surface with a radius of curvature substantially equal to the radius centered on the vertical axis of the swing damper is attached to the closed side portion of the base end portion And an engagement member capable of engaging the drive member within the predetermined opening angle to close the door body, and an arcuate outer peripheral surface that slides with an inner peripheral surface of the brake pad. The attached brake body is biased so as to maintain a stationary state in which the engagement member protrudes toward the drive member so that the drive member engages with the engagement member at the predetermined opening angle. And an elastic urging means for urging the oscillating arm in the closing direction when the engaging member and the oscillating arm are oscillated in the closing direction when the driving member is engaged with the engaging member. It is provided.

  Here, the brake body is a brake plate having the arcuate outer peripheral surface and an inner peripheral surface parallel to the outer peripheral surface, the closed side portion of the brake plate being movable in the radial direction, When the brake pad is pressed against the outer peripheral surface, it is preferable that a brake pad having an outer peripheral surface that slides against the inner peripheral surface of the brake plate while being pressed is attached to the swing arm.

  Further, the swing damper has a large braking force when the swing arm swings in the closing direction, and a small brake force when the swing arm swings in the opening direction. It is preferable that a valve is provided on a vane that rotates so as to compress oil filled therein.

  Further, the oil escape path is provided in the middle of the moving path of the vane that rotates so as to compress the oil filled in the swing damper, and the swing damper is controlled within a predetermined range immediately before the door body is closed. It is preferable that the power is configured to be smaller than the braking force in the other range.

  According to the door closer according to the present invention, the door body can be freely operated in the opening and closing direction in a state where the door body is opened with respect to the frame of the hinged door at a predetermined opening angle, and the door body is opened with the predetermined opening. In a state within the angle, a braking force is applied and a closing force is applied, so that the door body is quietly automatically closed and is attached to one of the frame body and the upper portion of the door body. A main body, a drive member attached to the other of the main body, a swinging damper attached to the main body and protruding from a vertical axis, and attached to the vertical axis of the swinging damper, with the vertical axis as a center in a radial direction thereof A swing arm extending and swinging integrally with the vertical shaft, and an open side portion of a base end portion is supported by a vertical support shaft at the tip of the swing arm and extending in the radial direction. Against the vertical spindle A brake pad having a radius of curvature substantially equal to a radius centered on a vertical axis of the swing damper is attached to the closed side portion of the base end portion, and the brake pad is attached to the closed end portion of the base end portion. A brake body attached to the main body having an engagement member that can be engaged with the drive member within an opening angle to close the door body, and an arc-shaped outer peripheral surface that slides with an inner peripheral surface of the brake pad. Urging the engagement member to protrude toward the drive member so that the drive member engages with the engagement member at the predetermined opening angle, and holding the stationary state, As the engaging member and the swinging arm swing in the closing direction by engaging with the engaging member, the elastic biasing means for biasing the swinging arm in the closing direction is provided. Hydraulic by piston and cylinder of structure Compared to a conventional door closer configured to apply a braking force to the arm via a rack and a pinion, the swinging arm is directly connected to the vertical shaft of the swinging damper to apply a braking force to the swinging arm. Since it is the simple structure to provide, an assembly property and maintainability become high, and cost can be reduced.

In addition, a swing damper that generates a relatively large torque is used, a compact brake that incorporates a brake pad and brake body around the swing damper is used in combination with the swing damper, and a hinged door. Since the brake pad that swings around the vertical support shaft together with the engaging member is strongly pressed against the brake body when the door is closed, the capacity of the swing damper can be reduced. Compared to a conventional door closer configured to apply a braking force by a rotary viscous damper, the outer shape around the damper can be significantly reduced.
As a result, a smart appearance that does not give a feeling of foreign matter or pressure can be achieved, so that the use is not avoided in ordinary homes.
In particular, since there are few space restrictions when attaching the main body to the frame body side, the main body can be attached to the frame body side, and in that case, a drive member is attached to the door body side, and with opening and closing of the door body Since there is no main body on the upper part of the door body that moves and gives a feeling of pressure, it is more suitable for use in ordinary households.
In addition, since the brake pad is attached to the closed side portion of the base end portion of the engaging member in which the open side portion of the base end portion is supported by the vertical support shaft at the tip end portion of the swing arm, the door body is When moving in the closing direction, the brake pad is pressed against the brake body and the brake works.When the door moves in the opening direction, the brake pad is not pressed against the brake body and the brake does not work. And the brake which consists of a brake body does not inhibit the operativity at the time of opening a door body.

Further, the brake body is a brake plate having the arcuate outer peripheral surface and an inner peripheral surface parallel to the outer peripheral surface, the closed side portion of the brake plate being movable in the radial direction, and the outer periphery of the closed side portion When the brake pad is pressed on the surface, the brake plate is pressed and the brake pad having an outer peripheral surface that slides with the inner peripheral surface of the brake plate is attached to the swing arm. The brake is constituted by a bent plate-like brake plate whose closed side portion is movable in the radial direction, and a brake pad that slides on the outer peripheral surface and inner peripheral surface thereof, and the outer peripheral surface side and inner peripheral surface side of the brake plate The brake pads work by sliding the brake pads so that both sides of the brake plate are sandwiched between them. It can constitute a brake to act.
Therefore, in addition to the above effects, the capacity of the swing damper can be further reduced, and the braking force of the brake can be stabilized over a long period of time. Therefore, the door closer is more suitable for use in ordinary homes as a smarter appearance. While being able to set it as a structure, the reliability of a door closer can be improved over a long period of time.

  Further, the swing damper has a large braking force when the swing arm swings in the closing direction, and a small braking force when the swing arm swings in the opening direction. In addition to the above effects, if the vane that rotates so as to compress the oil filled inside is provided with a valve, the braking force of the swing damper that acts when the door body is opened is small. The operability when the damper opens the door body is not hindered.

  Furthermore, the oil escape path is provided in the middle of the moving path of the vane that rotates so as to compress the oil filled in the rocking damper, and the rocking damper in the predetermined range immediately before the door body is completely closed. If the braking force is configured to be smaller than the braking force in other ranges, for example, when the door is configured to open to the indoor side and the room is at negative pressure, the door body is caused by a difference in atmospheric pressure inside and outside the room. Even if a force to open the door is added or a resistance force is applied to lock the door, the braking force of the swing damper is reduced just before the door body is closed. The body can be closed securely.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all the embodiments that satisfy the requirements described in the claims. It is a waste. In this specification, the direction of movement when closing the door body D of the hinged door HD is the closing direction A (see, for example, FIG. 1), and the direction of movement when opening the door body D is the opening direction B (FIG. 1). The portion on the closing direction A side in the member that moves as the door body D opens and closes is referred to as a closing side portion, and the portion on the opening direction B side is referred to as an opening side portion.

1 to 3 are schematic views showing a state in which the door closer according to the embodiment of the present invention is attached to the opening door HD, FIG. 1 is a perspective view, and FIGS. 2 and 3 are partial sectional plan views. 2 shows a state in which the door body D is opened to a predetermined opening angle C, and FIG. 3 shows a state in which the door body D is closed by the door closer.
4 is an exploded perspective view of the door closer, FIG. 5 is a partially sectional plan view showing an enlarged main part in a state in which the door body D is within the predetermined opening angle C, and FIGS. 6 and 7 close the door body D. FIG. 6A shows a state in which the door body D is opened at a predetermined opening angle C, and FIG. 6B shows a state in which the door body D is at the predetermined opening angle C. FIG. 7A shows a state in which the door body D is within the predetermined opening angle C, and FIG. 7B shows a state in which the door body D is closed.
Further, FIG. 8 is an explanatory view showing a return operation in a state where the engagement piece 6 not engaged with the engagement pin 2 has swung in the closing direction, and FIG. FIG. 8B is a perspective view of the engaging piece 6 and the engaging pin 2 as viewed from below.

As shown in FIG. 1 to FIG. 3, the hinged door HD is a door that is supported by a frame F around the opening and swingable in the closing direction A and the opening direction B by a hinge H so as to open and close the opening. It consists of body D.
Further, the door closer can freely operate the door body D in the opening / closing direction when the door body D is opened with respect to the frame body F at a predetermined opening angle C (see FIG. 2). In the state within the predetermined opening angle C, the engagement piece 6 that is an engagement member that is attached to the upper part of the frame body F and projects in the direction of the door body D from the main body 1 including the lower case 16 and the upper case 17. The engaging pin 2 which is a driving member attached to the upper portion of the door body D is engaged with the engaging groove 6D of the door body D, and the braking force is applied by the swing damper 3, brake pads 7 and 9 and the brake plate 8 which will be described later. And is biased in the closing direction by the elastic biasing means 10 to be described later, so that the door body D can be quietly and automatically closed until the door body D shown in FIG. 3 is closed. is there.

As shown in FIG. 4, the rocking damper accommodating portion 16E in the middle portion in the longitudinal direction of the lower case 16 is compressed into the vertical shaft 3A by compressing oil filled by, for example, rotating vanes accommodated therein. A swing damper 3 having a relatively large generated torque, which is configured to apply a braking force to a connected and swinging load, is inserted into the lower case 16 by inserting the mounting screws 25 and 25 into the mounting holes 3B and 3B. It is attached by screwing into the embedded female screw.
The vertical shaft 3A protruding upward from the swing damper 3 has a first swing arm 4 and a second swing shaft that extend in the radial direction about the vertical shaft 3A and swing integrally with the vertical shaft 3A. The swing arm 5 is attached with the shaft holes 4A and 5A fitted on the vertical shaft 3A and the second swing arm attached to the upper side of the first swing arm 4.

Since the vertically-supporting vertical support shaft 5B attached to the distal end portion of the second swing arm 5 is fitted into the fitting hole 6A formed in the base end portion opening side portion of the engagement piece 6, the vertical support shaft The engaging piece 6 extending in the radial direction around the vertical shaft 3A of the swing damper 3 with the open side portion of the base end portion pivotally supported by 5B swings around the vertical support shaft 5B in the closing direction. Can do.
The closed end portion of the base end portion of the engagement piece 6 has an inner peripheral surface 7B having a radius of curvature substantially equal to the radius around the vertical axis 3A of the swing damper 3, for example, an outer brake pad made of rubber, for example. 7, by fitting the mounting pieces 7C and 7C into the mounting grooves 6C and 6C (see FIG. 8B), the outer peripheral surface 7A is used as the inner peripheral surface 6B of the engaging piece 6 (see FIG. 8B). ) Is attached in the state of being attached
Further, the lower surface of the engagement piece 6 is substantially circular in plan view extending from the distal end side to the proximal end side so that the engagement pin 2 can be engaged within the predetermined opening angle C and the door body D can be closed. An arcuate engagement groove 6D is formed.

A brake plate 8, which is a brake body having an arcuate outer peripheral surface 8 </ b> A that slides with the inner peripheral surface 7 </ b> B of the outer brake pad 7, is opened on the side wall of the lower case 16 that rises around the swing damper accommodating portion 16 </ b> E. It is attached by inserting and screwing the attachment screw 26 into the attachment hole 8C at the side end.
The brake plate 8 is made of, for example, a stainless steel plate, and has an arcuate outer peripheral surface 8A and an inner peripheral surface 8B parallel to the outer peripheral surface 8A. The brake plate 8 and the lower case 16 are attached to the brake plate 8 at an open position. While only the side end portion is provided, the closed side portion of the brake plate 8 is provided with play that is movable in the radial direction around the vertical shaft 3A of the swing damper 3.
Further, an inner brake pad 9 made of, for example, rubber, having an outer peripheral surface 9A having a radius of curvature substantially equal to the radius centered on the vertical axis 3A of the swinging damper 3 is attached to the inner peripheral surface 9B by the mounting pieces 9C and 9C. When the outer brake pad 7 is pressed against the outer peripheral surface 8A of the closed side portion of the brake plate 8 attached to the first swing arm 4 while being attached to the outer peripheral surface 4B of the first swing arm 4, The closed portion of the brake plate 8 moves inward (vertical shaft 3A side) and is pressed by the inner brake pad 9, and the inner peripheral surface 8B of the brake plate 8 and the outer peripheral surface 9A of the inner brake pad 9 slide. To do.

The elastic urging means 10 constituted by the compression coil spring 11, the spring case 12 and the pressing member 13 is accommodated in the elastic urging means accommodating portion 16 </ b> F of the lower case 16.
As shown in FIGS. 2 to 4, the engagement concave portion 12 </ b> B of the spring case 12 is engaged with the engagement convex portion 13 </ b> C of the pressing member 13 and can slide in the longitudinal direction of the lower case 16. 2 and 3 accommodates the compression coil spring 11 that is compressed in a state of being attached to the lower case 16 shown in FIGS. 2 and 3, so that the elastic biasing means 10 is restored based on the elastic deformation of the compression coil spring 11. A biasing force is applied to the first swing arm 4 by the force.
In a state where the engagement piece 6 protrudes toward the engagement pin 2 side (door body D side) so that the engagement pin 2 engages with the engagement groove 6D at the predetermined opening angle C shown in FIG. 13 inclined surfaces 13A are in contact with the stationary contact surface 4C of the first swing arm 4, and are perpendicular to the inclined surface 13A at a position where these inclined surfaces 13A and the stationary contact surface 4C are in contact. The direction is substantially toward the vertical axis 3A, and the torque necessary to rotate the swing arms 4 and 5 around the vertical axis 3A does not act. The stationary state in which the engagement piece 6 shown in FIG.

On the other hand, the door D moves from the stationary state shown in FIG. 2 in the closing direction A, and the engagement pin 2 moves while engaging with the engagement groove 6D. In the state shown in FIG. 5 in which 5 swings in the closing direction A, the pressed protrusion 4D located at the open end of the stationary contact surface 4C of the first swing arm 4 is the pressing surface 13B of the pressing member 13. The counterclockwise torque around the vertical axis 3A acts on the first swing arm 4 in FIG.
Therefore, the engaging pin 2 is attached because the engaging pin 2 moves as indicated by the arrow E while being engaged with the engaging groove 6D of the engaging piece 6 by the urging force of the elastic urging means 10 as described above. The door body D moves in the closing direction A and is automatically closed to the state shown in FIG.

As shown in FIGS. 2 to 4, the inclined surface 14 </ b> A of the adjustment block 14 is in contact with the inclined surface 12 </ b> A of the spring case 12 of the elastic biasing means 10, and the screw portion 15 </ b> B is provided in the screw hole 14 </ b> B of the adjustment block 14. By adjusting the screw 15 and rotating the head 15A with the head 15A engaged with the adjustment screw support groove 16D located on the outside of the lower case 16, the adjustment block 14 is moved indoors and outdoors. In order to move in the direction, the spring case 12 in which the inclined surface 12A abuts on the inclined surface 14A of the adjustment block 14 moves in the longitudinal direction of the main body 1 (horizontal direction orthogonal to the indoor / outdoor direction).
Therefore, the biasing force by the elastic biasing means 10 can be adjusted by operating the head 15 </ b> A exposed to the outdoor side and rotating the adjusting screw 15.

Further, as shown in FIG. 4, the lower case 16 has a swing damper 3, a first swing arm 4 and an inner brake pad 9, a brake plate 8, a second swing arm 5, an engagement piece 6 and an outer brake pad 7. After the adjustment block 14, the adjustment screw 15, and the elastic biasing means 10 are assembled, the engagement protrusions 17A of the upper case 17 are fitted into the engagement depressions 16A,. ... and the engaging projections 19, ... are engaged so that the head 15A of the adjustment screw 15 is engaged with the adjustment screw support groove 17D, and a mounting screw (not shown) is inserted into the through-holes 17B, ... By screwing into the holes 16B,..., The main body 1 in a state in which components such as the swing damper 3 are accommodated is integrated, and such a main body 1 is formed using the long holes 20A, 20B,. As shown in Fig. 1, it can be easily attached to the top of the frame F. Can.
According to the configuration of the door closer as described above, the swing arm 4, 5 is directly connected to the vertical shaft 3 </ b> A of the swing damper 3 to apply a braking force to the swing arm 4, 5. As a result, hydraulic dampers are constructed with pistons and cylinders with a special structure, and the assembly and maintainability are higher and the cost is higher than conventional door closers that apply braking force to the arms via racks and pinions. Can be reduced.

Further, as shown in FIG. 4, the engaging pin 2 having the flange portion 2A formed around the lower end portion is inserted into the engaging pin support hole 21A of the base body 21 from the lower side and protrudes upward. Since the lower end of the support pin 23 is inserted into the receiving hole 24 </ b> A of 24, the support pin 23 is erected from the support plate 24, and the engagement pin 2 is elastically moved upward by the compression coil spring 22 supported by the support pin 23. In a state of being urged, the support plate 24 is fixed to the base 21 by inserting a mounting screw (not shown) into the through hole 21C of the base 21 from above and screwing into the screw hole 24B of the support plate 24. The holes 21B and 21B are attached to the upper side surface of the door body D as shown in FIG.
Here, since the main body 1 attached to the frame body F as described above is formed with openings 16C and 17C having a substantially V-shape in plan view that opens toward the door body D, it is shown in FIG. In the closed state of the door body D, the base body 21 and the main body 1 (the lower case 16 and the upper case 17) do not interfere with each other.

Next, the operation of the door closer will be described with reference to FIGS.
In a state in which the door body D shown in FIG. 6A is opened at a predetermined opening angle C (see FIG. 6B), the engagement pin 2 that is a drive member and the engagement piece 6 that is an engagement member, Since they are separated from each other, the door body D can be freely operated in the opening / closing direction as described above.
From this state, when the door body D is moved in the closing direction A and the predetermined opening angle C shown in FIG. 6B is reached, the engagement pin 2 is positioned at the tip of the engagement piece 6 and enters the engagement groove 6D. It will be in the state where it came.
When the door body D further moves in the closing direction A, the stationary state in which the engaging piece 6 protrudes toward the engaging pin 2 as described above is released, and the elastic biasing means 10 is released as shown in FIG. The door D to which the engagement pin 2 is attached moves in the closing direction A because the engagement pin 2 moves as indicated by the arrow E while being engaged with the engagement groove 6D of the engagement piece 6 by the urging force of It moves and automatically closes to the state shown in FIG.

In addition, when the door body D is automatically closed in this way, a braking force is applied by the swing damper 3 to the movement of the swing arms 4 and 5 in the closing direction.
In addition, the outer brake pad 7 is attached to the closed side portion of the proximal end portion of the engagement piece 6 in which the open side portion of the proximal end portion is supported by the vertical support shaft 5B at the distal end portion of the second swing arm 5. Therefore, when the door body D moves in the closing direction A while the engagement pin 2 engages with the engagement groove 6D, the engagement piece 6 moves around the vertical support shaft 5B with respect to the swing arms 4 and 5. Therefore, the outer brake pad 7 is pressed against the outer peripheral surface 8A of the brake plate 8, and the inner peripheral surface 8B of the brake plate 8 is pressed against the outer peripheral surface 9A of the inner brake pad 9 (see also FIG. 5). .)
Therefore, the brake pads 7 and 9 on the outer peripheral surface 8A side and the inner peripheral surface 8B side of the brake plate 8 slide so as to sandwich the both surfaces of the brake plate 8, and the brake works. A brake for applying power is configured.

By using such a compact brake that applies a stable braking force, the reliability of the door closer can be improved over a long period of time, and since such a brake is used in combination with the swing damper 3, Since the capacity of the swing damper 3 can be greatly reduced compared to the configuration in which the braking force is applied only by the swing damper 3, the outer shape around the swing damper 3 can be significantly reduced.
As a result, a smart appearance that does not give a feeling of foreign matter or pressure can be achieved, so that the use is not avoided in ordinary homes.

When the door body D is opened from the closed state of the door body D as shown in FIG. 7B, the open side end of the engagement piece 6 comes into contact with the contact piece 5C (see FIGS. 3 and 4). Since the engaging piece 6 and the swinging arms 4 and 5 move in the opening direction B in this state, the outer brake pad 7 is not pressed against the brake plate 8 and the brake is not effective. The operability when opening the door body D is not hindered.
As will be described in detail later, the swing damper 3 has a large braking force when the swing arms 4 and 5 swing in the closing direction A, and the swing arms 4 and 5 swing in the opening direction B. If the valve is provided on the vane that rotates so as to compress the oil filled therein so that the braking force is reduced when moving, the swing damper 3 that operates when the door body D is opened. Since the braking force is small, the oscillating damper 3 does not hinder the operability when the door D is opened as in the case of the brake, and only the force for contracting the compression coil spring 11 of the elastic biasing means 10 is used. D can be opened.
Then, by opening the door body D, the engagement piece 6 and the swing arm 4 are driven by the engagement pin 2 engaged with the engagement groove 6D as shown in FIGS. 7A to 6B. , 5 are swung clockwise around the vertical axis 3A, and the stationary contact surface 4C of the first swing arm 4 is in contact with the inclined surface 13A of the pressing member 13 at the position shown in FIG. As described above, the stationary state in which the engagement piece 6 protrudes toward the engagement pin 2 is maintained by the urging force of the elastic urging means 10, and when the door body D is further opened, the engagement is as shown in FIG. The joining pin 2 is in a state of being separated from the engaging groove 6D of the engaging piece 6.

Next, with reference to FIG. 8, the returning operation in a state where the engagement piece 6 not engaged with the engagement pin 2 has swung in the closing direction A will be described.
As shown in FIG. 8 (a), when the engagement piece 6 and the swing arms 4 and 5 are swung in the closing direction in a state where the door body D is not closed, FIG. 8 (b) As shown in FIG. 4, the inclined surface 6E is formed on the lower surface of the open side portion of the engaging piece 6, and the engaging pin 2 is elastically supported by the compression coil spring 22 (see FIG. 4) as described above. When the door body D is closed from the state of FIG. 8A, the engagement pin 2 moves along the inclined surface 6E and engages with the engagement groove 6D shown in FIGS. 3 and 7B. When the door body D is opened from this state, the engaging piece 6 protrudes toward the engaging pin 2 by the urging force of the elastic urging means 10 as shown in FIG. It is possible to return to the stationary state.

  FIG. 9 is a schematic view showing an example of the swing damper 3. FIG. 9A shows a state in which the door body D swings in the closing direction A at an angle close to the predetermined opening angle C. FIG. b) shows a state of swinging in the closing direction A at an angle close to the closed state of the door body D, and FIG. 9 (c) shows a state of swinging in the opening direction B of the door body D. FIG. 9 (d) is a perspective view showing a vane and a valve taken out.

First, the configuration of the swing damper 3 shown in FIG. 9 will be described.
The housing 31 of the oscillating damper 3 is formed with stoppers 32, 32 which are fixed partitions that protrude inward from the inner peripheral wall surface 31A and the inner peripheral wall surfaces 32C, 32C face each other. The outer peripheral surface 33B of the base 33, which is a supported rotating body, is in sliding contact with the inner peripheral wall surfaces 32C and 32C of the stoppers 32 and 32.
Further, the vanes 34 and 34 extending in the radial direction from the base body 33 are, in the swing damper 3 alone, from a position where the vane 34 is in contact with the side wall surface 32A of the one stopper 32 to a position where the vane 34 is in contact with the side wall surface 32B of the other stopper 32. Can be swung within the range.
Furthermore, oil storage chambers S1, S1, S2, and S2 defined by the stoppers 32 and 32 and the vanes 34 and 34 are filled with, for example, silicon oil, and sealed with a lid (not shown).
It should be noted that the stoppers 32 and 32, which are fixed partitions that separate the oil storage chambers S1 and S2, are not relatively illustrated, for example, circumferential narrow grooves formed on the top surface or relatively small holes such as micro holes connecting the side wall surfaces 32A and 32B. A small flow path is formed.

There is a gap between the outer peripheral surface 34A of the vane 34 and the inner peripheral wall surface 31A of the housing 31, and a valve accommodating portion 35 that accommodates the valve 38 is located between two parallel blades of the vane 34. Since the valve 35 opens in the radial direction, the valve 38 protrudes and protrudes from the outer peripheral surface 34A, and contacts the inner peripheral wall surface 31A of the housing 31 with the valve 38 protruding in the radial direction.
Of the two blades parallel to the vane 34, the blades closer to the side wall surface 32 </ b> A of the stopper 32 when swinging in the closing direction A are notched 36 and 36. Is formed.
Further, a circumferential groove 37 longer than the circumferential length of the inner circumferential wall surface 32 </ b> C of the stopper 32 is formed on the outer circumferential surface (for example, the lower circumferential surface of the lower end portion) of the base 33 on the side close to the notch 36.
In the swing damper 3 having such a configuration, since the vertical shaft 3A is fitted in the shaft hole 33A of the base body 33, the base body 33 and the vanes 34 and 34 swing integrally with the vertical shaft 3A.

Next, the operation of the swing damper 3 shown in FIG. 9 will be described.
The state of swinging in the closing direction A at an angle close to the predetermined opening angle C of the door body D shown in FIG. 9A corresponds to the state of FIG. 5 and FIG. In this state, the vane 34 moves in a direction in which the oil in the oil storage chamber S1 is compressed, and the oil that has entered the valve storage portion 35 from the step portions 36, 36 of the vane 34 has a diameter in the valve 38. Since the pressure p acts in the direction of pushing in the direction, the vane 34 approaches the side wall surface 32A of the stopper 32 while the valve 38 protrudes in the radial direction and is kept in contact with the inner peripheral wall surface 31A of the housing 31. Moving.
Therefore, when the vane 34 moves in the direction approaching the side wall surface 32A of the stopper 32, the oil in the oil storage chambers S1 and S1 is compressed and moved from the relatively small flow path into the oil storage chambers S2 and S2. Since the resistance at that time is large, a large braking force is applied to the load connected to the vertical shaft 3A and swinging.

In the state where the door D swings in the closing direction A at an angle close to the closed state shown in FIG. 9B, the oil storage chamber in which the circumferential groove 37 straddles the stopper 32 across the inner peripheral wall surface 32 </ b> C of the stopper 32. Since S1 and S2 are communicated with each other, the circumferential groove 37 serves as an oil escape path, so that the oil moves from the oil storage chamber S1 to the oil storage chamber S2 as indicated by an arrow G1.
Accordingly, since the braking force of the swing damper 3 is small (resistance is light) immediately before the door body D is completely closed, by using such a swing damper 3, for example, the door body D is placed indoors. Even if a force to open the door D is applied due to a difference in atmospheric pressure inside or outside the room, such as when the room is in a negative pressure with an open configuration, or a resistance force for locking is applied The door body D can be securely closed.

In the state where the door body D swings in the opening direction B shown in FIG. 9C, the vane 34 moves in the direction in which the oil in the oil storage chamber S2 is compressed. The pressure p (see FIG. 9A) in the pushing direction does not act, and the inclined surface 38A of the valve 38 is pushed by the oil on the oil containing chamber S2 side, so that the valve 38 moves back into the valve containing portion 35, Since a gap is formed between the vane 34 and the valve 38 and the inner peripheral wall surface 31A of the housing 31 and the oil storage chambers S1 and S2 sandwiching the vane 34 communicate with each other, oil is stored from the oil storage chamber S2 as indicated by an arrow G2. Oil moves to chamber S1.
Therefore, when the door body D swings in the opening direction B, the braking force of the swing damper 3 is small (resistance is light). Therefore, by using such a swing damper 3, the door body D is used. The operability when opening the door is not hindered.

In the above description, the case where the first swing arm 4 and the second swing arm 5 are separate bodies has been described. However, the swing arm may be an integral body.
In the above description, the case where the brake body is the brake plate 8 has been described. However, the brake body is not plate-shaped, but an arc shape that slides with the arc-shaped inner peripheral surface 7B of the outer brake pad 7. It is good also as a structure which eliminated the inner side brake pad 9 as a solid thing which has an outer peripheral surface.
However, if the brake body is used as the brake plate 8 and the brake pads 7 and 9 on the outer peripheral surface 8A side and the inner peripheral surface 8B side of the brake plate 8 are slid so as to sandwich both surfaces of the brake plate 8, Thus, a stable and large braking force can be applied with a more compact configuration.

Furthermore, in the above description, the case where the drive member is the engagement pin 2 and the engagement member is the engagement piece 6 in which the engagement groove 6D is formed is shown. However, the configuration of the drive member and the engagement member is shown. Is not limited to the configuration using the engagement pin 2 and the engagement piece 6, and an engagement groove or a roller or the like provided on the engagement member side is engaged by providing an engagement groove on the drive member side. It may be.
Furthermore, in the above description, the configuration in which the main body 1 is attached to the upper part of the frame body F and the engagement pin 2 is attached to the upper part of the door body D has been described. You may attach an engaging pin to the frame F for a main body.
However, according to the door closer of the present invention, since the outer shape around the swing damper 3 can be greatly reduced, there are particularly few space restrictions when the main body 1 is attached to the frame F side. 1 can be attached to the frame body F side, and in that case, the engagement pin 2 is attached to the door body D side, and the door body D moves as the door body D opens and closes, and the door body D is easy to give a feeling of pressure. Since there is no main body 1 in the upper part, the configuration is more suitable for use in general households.

It is a perspective view which shows the state which attached the door closer which concerns on embodiment of this invention to the hinged door. It is a fragmentary sectional top view similarly, and has shown the state closed from the state which opened the door body to the predetermined opening angle. It is a fragmentary sectional top view similarly, and has shown the state by which the door body was closed by the door closer. It is a disassembled perspective view of a door closer. It is a fragmentary sectional top view which expands and shows the principal part of a door closer, and has shown the state which has a door body within the predetermined opening angle. It is operation | movement explanatory drawing of the door closer at the time of closing a door body, (a) has shown the state which the door body opened more than the predetermined opening angle, (b) has shown the state which is a predetermined opening angle. It is operation | movement explanatory drawing similarly, (a) has shown the state in which a door body exists in a predetermined opening angle, (b) has shown the state in which the door body was closed. It is explanatory drawing which shows return operation | movement in the state which the engagement piece which has not engaged with the engagement pin rock | fluctuated to the closing direction, (a) is a fragmentary sectional top view, (b) is an engagement piece, It is the perspective view which looked at the engagement pin from the lower part. It is a figure which shows the structure and operation | movement of a rocking | fluctuation damper, (a) is a cross-sectional top view which shows the state rock | fluctuated in the closing direction at an angle close | similar to the predetermined opening angle of a door body, (b) is closure of a door body. The cross-sectional top view which shows the state which is rock | fluctuating to the closing direction at an angle close | similar to a state, (c) is a cross-sectional top view which shows the state rock | fluctuating to the opening direction of a door body, (d) is a vane and a valve. It is a perspective view taken out and shown.

Explanation of symbols

A Closing direction B Opening direction C Predetermined opening angle D Door body F Frame body H Hinge HD Sliding door 1 Body 2 Engaging pin (drive member)
DESCRIPTION OF SYMBOLS 3 Oscillation damper 3A Vertical axis | shaft 4 1st oscillation arm 4A Shaft hole 4C Contact surface 4D at the time of rest Pressed convex part 5 2nd oscillation arm 5A Shaft hole 5B Vertical support shaft 6 Engagement piece (engaging member)
6A Fitting hole 6D Engaging groove 7 Outer brake pad 7B Inner peripheral surface 8 Arc-shaped brake plate (brake body)
8A outer peripheral surface 8B inner peripheral surface 9 inner brake pad 9A outer peripheral surface 10 elastic biasing means 11 compression coil spring 12 spring case 12A inclined surface 12B engaging recess 13 pressing member 13A inclined surface 13B pressing surface 13C engaging convex portion 16 lower case 17 Upper Case 21 Base 21A Engagement Pin Support Hole 22 Compression Coil Spring 23 Support Pin 24 Support Plate 31 Housing 32 Stopper 33 Base 34 Vane 37 Circumferential Groove (Oil Escape Path)
38 valves

Claims (4)

When the door body is opened with respect to the frame of the hinged door at a predetermined opening angle, the door body can be freely operated in the opening / closing direction, and when the door body is within the predetermined opening angle, braking force is applied. A door closer that is quietly automatically closed because it is applied and biased in the closing direction,
A main body attached to one of the upper part of the frame body and the door body, and a drive member attached to the other of them,
A swing damper attached to the main body and protruding from a vertical axis;
A swing arm attached to the vertical shaft of the swing damper, extending in the radial direction about the vertical shaft, and swinging integrally with the vertical shaft;
The open side portion of the base end is supported by the vertical support shaft at the tip of the swing arm and extends in the radial direction, and can swing in the closing direction around the vertical support shaft with respect to the swing arm. A brake pad having an inner peripheral surface with a radius of curvature substantially equal to the radius centered on the vertical axis of the swing damper is attached to the closed side portion of the base end portion, and is engaged with the drive member within the predetermined opening angle. And an engagement member capable of closing the door body,
A brake body attached to the main body, having an arcuate outer peripheral surface that slides with an inner peripheral surface of the brake pad;
The engagement member is urged so as to be engaged with the engagement member at the predetermined opening angle so as to maintain a stationary state in which the engagement member protrudes toward the drive member, and the drive member is engaged with the engagement member. Elastic urging means for urging the oscillating arm in the closing direction as the engaging member and oscillating arm oscillate in the closing direction by engaging with a combination member;
A door closer characterized by comprising.   The brake body is a brake plate having the arcuate outer peripheral surface and an inner peripheral surface parallel to the outer peripheral surface, and the closed side portion of the brake plate is movable in the radial direction, and is disposed on the outer peripheral surface of the closed side portion. The door closer according to claim 1, wherein when the brake pad is pressed, a brake pad having an outer peripheral surface that slides with an inner peripheral surface of the brake plate while being pressed is attached to the swing arm. .   The swing damper has a large braking force when the swing arm swings in the closing direction, and a small braking force when the swing arm swings in the opening direction. The door closer according to claim 1, wherein a valve is provided in a vane that rotates so as to compress oil filled in the container. The oil escape path is provided in the middle of the moving path of the vane that rotates so as to compress the oil filled in the rocking damper, and the braking force of the rocking damper in a predetermined range immediately before the door body is closed. The door closer according to claim 1, wherein the door closer is configured to be smaller than a braking force in another range.

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