JP2023175481A - door closer - Google Patents

Abstract

To provide a door closer which does not impair the authentic property of a door and the atmosphere in the vicinity of an entrance, and is excellent in safety such as not jumping around even if a bent part is broken.SOLUTION: A door closer includes: an elastic member 10 formed of a rectangular elastic piece whose one end is bent and fixed to one side of a door frame F as a fixing section 11 and whose the other end is formed into a free end and serves as an urging section 12 for urging a door D in a direction in which the door D is always closed by an elastic restoring force of the elastic piece in a state in which the elastic piece is in sliding contact with a surface D1 of the door D; and a restoring force transmission member 20 mounted on the door D so as to straddle the urging section 12 and guiding the sliding contact posture of the elastic member 10 on the surface D1 of the door D.SELECTED DRAWING: Figure 1

Description

The present invention relates to a door closer.

Conventionally, as a device for automatically closing a hinged door (hereinafter simply referred to as a door), a spring adjusts the force acting on the door by adjusting the hydraulic pressure in a cylinder with a control valve, thereby controlling the speed at which the door closes. Such door checkers are widely used (for example, see Patent Document 1).

The door checker mentioned above is attached to the upper edge of the door, but the body that houses cylinders, springs, etc. tends to be large, and is equipped with a bending arm that is connected to the door frame, protruding largely from the door surface. Because they are objects, they are conspicuous even though they are above people's line of sight, so they often spoil the design of the door and the atmosphere around the entrance/exit. Further, since the mechanism is complicated, it is expensive, and the work of attaching it to the door and door frame is cumbersome, and it is also troublesome to adjust the speed at which the door closes.

In order to solve these disadvantages of conventional door checkers, for example, Patent Document 2 discloses that a plate-shaped elastic body is fixed to the support between the hinges of a gate, and the surface of this plate-shaped elastic body is It is disclosed that the gate can be automatically closed by the elastic force of the plate-like elastic body by bringing it into contact with the back surface of the gate.

Japanese Unexamined Patent Publication No. 55-152282 Utility Model Publication No. 2-71800

However, the plate-shaped elastic body disclosed in Patent Document 2 is installed between the upper and lower hinges of the gate support and widely covers the gap between the gate and the support support, so it is installed only outdoors. Although it is useful in that it can improve the shielding performance of gates, it is too large to be used especially for indoor doors, so it is important to check the design of the door and the area near the entrance. This could not be adopted because it spoiled the atmosphere.

Further, since the plate-like elastic body is repeatedly bent at a specific location as the door is opened and closed, there is a risk that the bent location may break due to fatigue. If breakage occurs, the free end of the plate-like elastic body is simply in contact with the surface of the gate, so the free end side will jump in an unexpected direction due to the elasticity of the plate-like elastic body itself. As a result, if there were people nearby, there was a risk of injury.

The present invention has been made to solve the above problems, and its purpose is to provide a door closer that does not impair the design of the door or the atmosphere around the entrance when used for the door. Another object of the present invention is to provide a door closer that is highly safe and does not fly around even if the bent portion breaks.

In order to solve the above problems, the door closer disclosed in the present application is a door closer that always biases a hinged door, which is pivotally attached to one side of a door frame via a hinge, in a direction to close, and is composed of a strip-shaped elastic piece. , one end of the elastic piece is a fixed part fixed to the one side of the door frame, while the other end of the elastic piece is a free end, and the elastic piece is in sliding contact with the surface of the hinged door. an elastic member serving as a biasing section that always biases the hinged door in the closing direction by the elastic restoring force of the elastic piece; The present invention is characterized by comprising a restoring force transmitting member that transmits the restoring force to the hinged door.

In the door closer, a locking portion that protrudes in a direction intersecting the longitudinal direction of the elastic member is provided at the tip of the free end of the elastic member, and the restoring force transmitting member The locking portion may be engaged with the locking portion when the hinged door is in a predetermined fully open state.

The door closer may further include a decorative cover that is provided on the surface of the hinged door and integrally covers the biasing portion of the elastic member and the restoring force transmission member.

Another door closer disclosed in the present application is a door closer that always biases a hinged door pivoted to one side of a door frame via a hinge in a direction to close, and is composed of a strip-shaped elastic piece. One end of the elastic piece is a fixed part fixed to the one side of the door frame, while the other end of the elastic piece is a free end and is placed in a recess opened on one side of the hinged door. The hinged door has an elastic member acting as a biasing part that always biases the hinged door in a direction to close it when inserted and removably inserted, and a slit that allows the biasing part of the elastic member to be inserted and removed. A restoring force transmitting member is provided at the opening of the recess, and guides the insertion/removal posture of the elastic member in the recess of the hinged door, and transmits the elastic restoring force of the elastic piece to the hinged door. It is something to do.

In the door closer, a locking portion that protrudes in a direction intersecting the longitudinal direction of the elastic member is provided at the tip of the free end of the elastic member, and the restoring force transmitting member A withdrawal preventing portion may be provided at one end of the slit to allow the locking portion to enter the recess while preventing the locking portion from coming out of the recess. .

The door closer may further include an anchor member attached to the fixed portion of the elastic member and embedded in the inner surface of one side of the door frame.

According to the door closer disclosed in the present application, the design of the door and the atmosphere near the entrance are not spoiled, and even if the bent part breaks, it will not fly around, so it is also excellent in safety. .

1 illustrates an elastic member in an embodiment of a door closer disclosed in the present application, and FIG. 3A is a side view, FIG. 2B is a plan view, and FIG. A restoring force transmitting member in an embodiment of the door closer disclosed in the present application is illustrated, and FIG. 3(a) is a plan view, FIG. 3(b) is a front view, FIG. 3(c) is a perspective view, and FIG. FIG. 3 is a front view showing a state of engagement between the locking portion of the elastic member shown in FIG. 1 and the restoring force transmission member shown in FIG. 2; A decorative cover in an embodiment of the door closer disclosed in the present application is illustrated, in which (a) is a plan view, (b) is a front view, (c) is a perspective view, and (d) is a side view. FIG. 5 is a schematic diagram showing a state in which the decorative cover shown in FIG. 4 is attached. FIG. 3 is a schematic diagram illustrating the operation of the door closer and the hinged door illustrated in FIGS. 1 and 2, in which (a) the hinged door is closed, (b) the hinged door is in the middle of opening and closing, and (c) the hinged door is fully opened. are shown respectively. FIG. 7 is a perspective view illustrating a restoring force transmission member in another embodiment of the door closer disclosed in the present application. The restoring force transmitting member shown in FIG. 7, (a) is a plan view, (b) is a front view, (c) is a side view, and (d) is a central vertical sectional view. FIG. 8 is a schematic cross-sectional view showing a state of engagement between the withdrawal prevention portion of the restoring force transmission member shown in FIG. 7 and the locking portion of the elastic member. FIG. 7 is a schematic diagram illustrating the operation of a door closer and a hinged door in another embodiment of the door closer disclosed in the present application, in which (a) is a state in which the hinged door is closed, (b) is a state in which the hinged door is in the middle of opening and closing, and (c) is a diagram in which the hinged door is in the middle of opening and closing. Each shows a fully open state. FIG. 7 is a perspective view illustrating an elastic member in still another embodiment of the door closer disclosed in the present application. 12 is an exploded perspective view of the elastic member shown in FIG. 11. FIG. 12 is a front view of the elastic member shown in FIG. 11. FIG. 14 is a partial cross-sectional view taken along line AA in FIG. 13. FIG. FIG. 12 is a perspective view showing a state in which the elastic member shown in FIG. 11 is attached.

Embodiments of the present invention will be described below with reference to the drawings. Note that the following embodiments are examples of embodiments embodying the present invention, and are not intended to limit the technical scope of the present invention. In addition, common components in the following description and drawings are denoted by the same reference numerals.

<Embodiment 1>
-Door closer configuration-
An embodiment of the door closer disclosed in the present application will be described. The door closer 1 illustrated here always biases a hinged door D, which is pivotally attached to one side F1 of a door frame F via a hinge H, in the closing direction, as shown in FIG.

Specifically, the door closer 1 includes an elastic member 10 and a restoring force transmission member 20, as shown in FIGS. 1 and 2.

The elastic member 10 is composed of a rectangular elastic piece. The material of this elastic piece may be either metal or synthetic resin, and a material that exhibits a predetermined elastic restoring force and is resistant to fatigue failure is suitable. One end of the elastic piece is bent to form a fixing part 11 fixed to one side F1 of the door frame F. On the other hand, the other end of the elastic piece is a free end and serves as a biasing part 12 that is in sliding contact with the surface D1 of the hinged door D and always biases the hinged door D in the closing direction by the elastic restoring force of the elastic piece. ing. The fixing portion 11 is provided with fixing device insertion holes 14, 14 through which a fixing member such as a screw is inserted.

The elastic member 10 thus constructed has its original shape in a state where the one end is bent, and when it is forcibly deformed from this state in the direction in which the fixing part 11 and the biasing part 12 open, the degree of deformation changes. A corresponding elastic restoring force is generated, and the biasing portion 12 attempts to return to its original state. This elastic restoring force is appropriately set to a magnitude according to the size, weight, degree of smoothness of opening and closing, etc. of the hinged door D to which it is attached. If the restoring elastic force is too large than that suitable for the above-mentioned conditions of the hinged door D, the hinged door D will close quickly but the impact noise when closing will be loud; if it is too small, the hinged door D will close slowly, although the impact noise can be suppressed. Since it takes time to close, the movement of air between the inside and outside of the hinged door D increases, which may adversely affect, for example, air conditioning. Furthermore, in the illustrated example, the angle formed by the fixing part 11 and the biasing part 12 is set to an acute angle that is slightly smaller than a right angle, and the elastic restoring force of the elastic piece gradually decreases over time as the hinged door D is repeatedly opened and closed. I'm trying to limit the possibilities. Moreover, as a result, even if the hinged door D reaches the closed state, the elastic restoring force of the elastic member 10 acts on the hinged door D, although small, so that the hinged door D can be pressed against the door stop S and reliably closed. We are aiming to

Further, the elastic member 10 is provided with a locking portion 13 protruding in a direction intersecting the longitudinal direction of the elastic member 10 at the tip of its free end. In the illustrated example, only one locking portion 13 protrudes in one direction, but two locking portions 13 may protrude in both opposite directions. Further, the shape of the locking portion 13 does not have to be rectangular as shown in the illustrated example, and may be, for example, an arc or a polygon, and may have any shape. Further, the locking portion 13 is not essential and may not be provided at all.

The restoring force transmission member 20 is attached to the hinged door D so as to straddle the biasing portion 12 of the elastic member 10. This restoring force transmitting member 20 transmits the elastic restoring force of the elastic piece to the hinged door D.

Specifically, as shown in FIG. 2, the restoring force transmission member 20 includes a pair of pedestals 21, 21 attached to the surface D1 of the hinged door D, and a straddle constructed between these pedestals 21, 21. It is composed of a section 22. The dimension between the opposing inner edges 28, 28 of the pedestal parts 21, 21 is set to be slightly larger than the width dimension of the biasing part 12 of the elastic member 10. Further, the height of the straddle portion 22 is set to be slightly larger than the thickness of the elastic member 10. Fixture insertion holes 23, 23 are formed in the pedestals 21, 21, respectively, at positions symmetrical with respect to the center of the restoring force transmitting member 20. As a result, the restoring force transmitting member 20 is firmly fixed to the surface D1 of the hinged door D without wobbling, so that the elastic restoring force of the elastic piece received from the urging portion 12 of the elastic member 10 can be firmly received.

Further, in this embodiment, the restoring force transmitting member 20 is configured to engage with the locking portion 13 of the elastic member 10 at one end thereof, as shown in FIG. 3, when the hinged door D is in a predetermined fully open state. ing. In this case, the restoring force transmitting member 20 is disposed at a position where it comes into contact with the locking portion 13 of the elastic member 10 when the hinged door D is in a predetermined fully open state. This prevents the hinged door D from opening more than necessary, and also prevents the biasing portion 12 of the elastic member 10 from coming off from the restoring force transmitting member 20.

Furthermore, since the elastic member 10 is bent the most when the hinged door D is in a predetermined fully open state, breakage of the bent portion is most likely to occur in this state, and even if breakage occurs, the restoring force transmission member 20 Since the locking portion 13 of the elastic member 10 is in the engaged state, the biasing portion 12 does not move toward the fixed portion 11 side. Further, even if the biasing portion 12 moves in the opposite direction, the damaged biasing portion 12 easily comes off from the restoring force transmitting member 20 because the distance from the restoring force transmitting member 20 to the broken point is long. Never. That is, even if the elastic member 10 is damaged due to fatigue fracture at the bent portion, the free end of the biasing portion 12 will not be scattered.

The door closer 1 disclosed in the present application may further include a decorative cover 30 as shown in FIG. 4. As shown in FIG. 5, this decorative cover 30 is provided on the surface D1 of the hinged door D, and integrally covers the biasing portion 12 of the elastic member 10 and the restoring force transmitting member 20.

Specifically, the decorative cover 30 has one end 31 and a back surface 32 open. In the illustrated example, the decorative cover 30 includes a flat rectangular top surface 33, a trapezoidal first slope 35 that slopes downward from the top surface 33 toward the other end 34, and a first slope 35 on each side from the top surface 33. It is comprised of a pair of second slopes 37, 37 which are sloped downward toward the edges 36, 36, respectively.

In the decorative cover 30 configured as described above, the peripheral edge of the back surface 32 is attached to the surface D1 of the hinged door D using, for example, double-sided adhesive tape or adhesive. Note that the means for attaching to the hinged door D is not limited to this, and for example, a flange portion may be provided on the periphery except for the open end 31, and it may be screwed to the hinged door D via this flange portion. Further, the shape of the decorative cover 30 is not limited to the above-described example, and may be, for example, a rounded dome shape, and the size is also determined by the biasing portion 12 of the elastic member 10 and the restoring force transmitting member as described above. 20 can be integrally covered, and either is arbitrary.

Further, the decorative cover 30 may be configured to directly receive the elastic restoring force of the elastic piece from the biasing portion 12 of the elastic member 10, and may also serve as a restoring force transmitting member. In that case, there is no need to separately prepare the restoring force transmission member 20.

-Door closer installation and operation-
The installation and operation of the door closer 1 will be explained with reference to FIG. 6.

To install the door closer 1, first, the fixing portion 11 of the elastic member 10 is fixed at a predetermined position on the inner surface F2 of the door frame F with the hinged door D open. Here, since the biasing part 12 is finally provided in a state in sliding contact with the surface D1 of the hinged door D, the fixing part 11 of the elastic member 10 is attached to the door stop S attached to the inner surface F2 of the door frame F. Since the fixing part 11 is held between the door stop S and the inner surface F2 of the door frame F, it is fixed to one side F1 of the door frame F. Therefore, when attaching the door closer 1 to an existing hinged door D, the door stop S of the door frame F may be removed once, and the fixing portion 11 of the elastic member 10 may be attached to the removed location. Moreover, when attaching the door closer 1 to a newly installed hinged door D, the door stop S may be attached last.

Next, when the hinged door D is closed, the biasing portion 12 of the floating elastic member 10 follows the surface D1 of the hinged door D, so the restoring force transmitting member 20 is placed over the biasing portion 12 of the hinged door D. Attach it to the predetermined position on the surface D1 and all the work is completed. Note that the installation procedure of the door closer 1 is not limited to the above example, and the fixing part 11 may be attached to the door frame F after the urging part 12 of the elastic member 10 is temporarily secured to the hinged door D using the restoring force transmission member 20. .

When the installation of the door closer 1 is completed above and the hinged door D is opened, the opening force is applied to the biasing part 12 of the elastic member 10 via the straddle part 22 of the restoring force transmission member 20, and the fixing part 11 and the The region between the contact portion 12 and the contact portion 12 is forcibly bent (see FIG. 6(b)). Further, at this time, the biasing portion 12 of the elastic member 10 slides on the surface D1 of the hinged door D within the straddle portion 22 of the restoring force transmission member 20 while being in sliding contact with the surface D1.

When the hinged door D reaches a predetermined fully open state, the locking portion 13 of the elastic member 10 comes into contact with one end edge of the straddle portion 22 of the restoring force transmission member 20, and the hinged door D is prevented from being forced to open any further ( (See Figure 6(c)).

In this state, when the swing door D is released from external force (for example, by releasing the hand holding the doorknob, or by releasing the door stopper installed on the floor that keeps the swing door D fully open), the elastic The elastic restoring force is transmitted from the biasing part 12 to the hinged door D via the straddle part 22 of the restoring force transmission member 20, and as a result, the hinged door D is urged in the closing direction by the elastic restoring force. Then, when the elastic member 10 returns to its original state, the hinged door D will be completely closed (see FIG. 6(a)).

<Embodiment 2>
Next, other embodiments of the door closer disclosed in this application will be described. As shown in FIG. 10, the door closer 1 illustrated here has a hinged door D that is pivotally attached to one side F1 of the door frame F via a hinge H, and is always attached in the closing direction, like the door closer 1 of the above embodiment. It is something that strengthens. Note that this embodiment differs from the above embodiment only in the attachment form of the elastic member 10 to the hinged door D and the configuration of the restoring force transmission member 20, so only the differences will be explained below, and it will be different from the above embodiment. The same components are given the same reference numerals and redundant explanations will be omitted.

As shown in FIG. 10, the door closer 1 of this embodiment is provided in a state in which the biasing portion 12 of the elastic member 10 is removably inserted into a recess D3 formed on one side D2 of the hinged door D. This embodiment differs from the above embodiment in this point. Therefore, the fixing portion 11 of the elastic member 10 is located at a position closer to the hinge H away from the door stop S provided on the inner surface of the door frame F. Therefore, when attaching the door closer 1 to an existing hinged door D, there is no need to once remove the doorstop S of the door frame F, and therefore the installation workability is better than in the above embodiment.

The recess D3 formed in the hinged door D may have any shape as long as it does not interfere with the biasing portion 12 of the elastic member 10.

As shown in FIGS. 7 and 8, the restoring force transmitting member 20 in this embodiment has a slit 24 that allows the urging part 12 of the elastic member 10 to be inserted and removed, and is inserted into the opening D4 of the recess D3 of the hinged door D. It is provided to guide the insertion and removal posture of the elastic member 10 in the recess D3 of the hinged door D, and to transmit the elastic restoring force of the elastic piece to the hinged door D.

Further, the restoring force transmission member 20 is attached to one end of the slit 24 to allow the locking portion 13 of the elastic member 10 to enter the recess D3, but to prevent the locking portion 13 from coming out of the recess D3. A withdrawal preventing portion 25 is provided.

Specifically, as shown in FIG. 7, the restoring force transmission member 20 includes a main body 26 that is fitted into the opening D4 of the recess D3 of the hinged door D, and a main body 26 that is provided around the periphery of this main body and that is attached to the edge of the opening D4 of the hinged door D. It has a flange part 27 that engages with the part, a fixture insertion hole 23 into which a fixing member such as a screw is inserted, and a slit 24. In the illustrated example, the lower end portion is arcuate, but the shape is not limited to this, and may be symmetrical to the upper end portion.

The slit 24 has a width dimension that allows insertion and removal of the biasing section 12 of the elastic member 10, and a length dimension that extends from the lower edge of the biasing section 12, as shown in FIG. The dimension is equal to or slightly larger than the dimension up to the upper edge of the locking portion 13. Moreover, the width dimension at the upper end of the slit 24 is wider than that at other parts, and a pull-out prevention part 25 is provided at the upper end edge.

As described above, the withdrawal preventing portion 25 allows the locking portion 13 to enter the recess D3, but prevents the locking portion 13 from coming out of the recess D3. In the present embodiment, the removal preventing portion 25 is constituted by a flexible inclined piece that slopes from the upper end edge of the slit 24 toward the inside of the recess D3, but is not limited to this. Note that the material for the withdrawal prevention part 25 may be any material that can be configured so that the withdrawal prevention part 25 can perform the above-mentioned functions, and it may be made of metal or synthetic resin. good.

-Door closer installation and operation-
To attach the door closer 1 of this embodiment, first, an opening D4 is formed in one side D2 of the hinged door D, and the biasing part 12 of the elastic member 10 is inserted into the slit 24 of the restoring force transmitting member 20. Next, open the hinged door D, insert the urging portion 12 protruding from the back side of the restoring force transmission member 20 into the opening D4 of the hinged door D, and then insert the flange portion 27 of the restoring force transmission member 20 into the edge of the opening D4. In this state, a fixing member such as a screw is inserted through the fixture insertion hole 23, and the restoring force transmitting member 20 is fixed in the opening D4. Finally, the fixing part 11 of the elastic member 10 is fixed to the inner surface F2 of the door frame F, and all the work is completed. Note that the installation procedure of the door closer 1 is not limited to the above example, and the fixing part 11 of the elastic member 10 is attached to the door frame F, and then the urging part 12 of the elastic member 10 is inserted into the slit 24 of the restoring force transmission member 20. In this state, the urging portion 12 may be inserted into the opening D4, and the restoring force transmitting member 20 may be fixed to the opening D4.

When the fully open hinged door D (see FIG. 10(c)) is released from external force after the installation of the door closer 1 is completed, the elastic restoring force of the elastic piece moves the slit 24 of the restoring force transmission member 20 from the biasing part 12. As a result, the elastic restoring force urges the hinged door D in the closing direction (see FIG. 10(b)). Then, when the elastic member 10 returns to its original state, the hinged door D will be completely closed (see FIG. 10(a)).

<Embodiment 3>
Next, still other embodiments of the door closer disclosed in the present application will be described with reference to FIGS. 11 to 15. The door closer 1 illustrated here is different from the second embodiment described above only in the form of the fixing part 11 of the elastic member 10 and the means for fixing the fixing part 11 to the door frame F, so the differences will be explained below. Components that are the same as those in the above embodiment will be given the same reference numerals, and redundant explanation will be omitted. Note that, like the door closer 1 of the above-described embodiment, the door closer 1 of this embodiment always biases the hinged door D, which is pivotally connected to one side F1 of the door frame F via the hinge H, in the closing direction. .

In the first and second embodiments described above, the fixed part 11 of the elastic member 10 has one end of the elastic piece bent, but in this embodiment, one end of the elastic piece is left straight without being bent. , the following anchor member 40 is attached to this part.

As shown in FIG. 15, the anchor member 40 is embedded in the inner surface F2 of the door frame F through its main body portion 41, and the fixing portion 11 of the elastic member 10 is fixed in a recess opening on the inner surface F2 of the door frame F. It is something to do.

In this anchor member 40, a slit 42 into which the fixing part 11 of the elastic member 10 is inserted is formed on one end surface of the main body section 41, and a mounting recess 43 communicating with this slit 42 is provided on one side surface of the main body section 41. It is being One opening edge 44 of the slit 42 is chamfered into a curved shape. As a result, as shown by the two-dot chain line in FIG. 14, the bending movement of the elastic member 10 that accompanies the opening/closing movement of the hinged door D is not hindered by the opening edge 44, and each time the bending movement is performed, the opening edge 44 This is designed to prevent the elastic member 10 from being damaged. Furthermore, the slit 42 and the mounting recess 43 are arranged so that the elastic member 10 does not protrude perpendicularly from one end surface of the main body 41, but is slightly inclined in a direction away from the opening edge 44, as shown in FIG. It is formed to be. Thereby, even if the hinged door D reaches the closed state, the elastic restoring force of the elastic member 10 acts on the hinged door D, although it is small, so that the hinged door D can be reliably closed.

The fixing part 11 of the elastic member 10 is inserted into the anchor member 40 as described above from the slit 42 side, and the fixing part 11 of the elastic member 10 is inserted into the attachment recess 43 of the main body part 41 using fixing tools 45, 45 such as screws and nuts. Fixed. As shown in FIG. 15, the anchor member 40 constructed in this manner is embedded in a recess of a door frame F formed into a shape into which the main body part 41 can be fitted, and a pair of holes formed in the main body part 41. The door frame F is fixed to the recessed portion of the door frame F by inserting a fixing device 48 such as a screw into the fixing device insertion holes 46, 46, for example. Here, in order to prevent the fixing devices 45, 45 from protruding from the surface on the opposite side of the mounting recess 43, the length of the screw 45a of the fixing devices 45, 45 is set within the thickness dimension of the main body portion 41, and The head portion is sized so as not to protrude from the mounting recess 43 to the outside of the main body portion 41 . Further, the nuts 45b of the fixtures 45, 45 are also buried in a recess (not shown) formed on the surface opposite to the mounting recess 43 so as not to protrude outward from the mounting recess 43 of the main body 41. . Thereby, the fixtures 45, 45 do not become an obstacle when the main body part 41 is inserted into the recess of the door frame F. Furthermore, in this embodiment, when attaching the door closer 1 to the door frame F and the hinged door D, the anchor member 40 inserts the elastic member 10 attached to the fixing part 11 into the slit 24 of the restoring force transmitting member 20. When the restoring force transmission member 20 is attached to the opening D4 of the hinged door D, and then the anchor member 40 is buried in the recess of the door frame F, the main body 41 of the anchor member 40 is attached to the opening D4 of the door frame F. It is difficult to directly face the recessed portion because of the elastic restoring force of the elastic member 10, and the main body portion 41 inevitably takes an inclined posture with respect to the recessed portion of the door frame F. Therefore, when trying to insert the main body part 41 into the recess of the door frame F, one corner of the main body part 41 interferes with the opening end of the recess, making it difficult to insert the main body part 41 into the recess. Therefore, in this embodiment, the corner on the side of the mounting recess 43 is chamfered 49. This facilitates the installation work. Reference numeral 47 in the figure indicates a flange portion formed on the outer peripheral edge of one end surface of the main body portion 41 and engaged with the opening edge of the recessed portion of the door frame F. Note that the form of the anchor member 40 is not limited to the illustrated example, and may be arbitrary as long as the fixing portion 11 of the elastic member 10 can be fixed within the recess of the door frame F.

The installation of the door closer 1 according to this embodiment is the same as that of the second embodiment, except that the method of attaching the fixing part 11 of the elastic member 10 to the door frame F is as described above, and the operation is also carried out. This is the same as form 2.

The anchor member 40 of the door closer 1 according to this embodiment is of course applicable to Embodiments 1 and 2. In this case, the elastic member 10 has a straight shape as a whole as shown in FIG. 12.

Note that the present invention may be embodied in various other forms without departing from its spirit or essential characteristics. Therefore, the above-described embodiments are merely illustrative in all respects, and should not be interpreted in a limiting manner. The scope of the present invention is indicated by the claims, and is not restricted in any way by the text of the specification and the drawings. Furthermore, all modifications and changes that come within the scope of equivalents of the claims are intended to be within the scope of the present invention.

1 Door closer 10 Elastic member 11 Fixing part 12 Biasing part 13 Locking part 14 Fixture insertion hole 20 Restoration force transmission member 21 Pedestal part 22 Straddle part 23 Fixture insertion hole 24 Slit 25 Removal prevention part 26 Main body 27 Flange part 28 Inner edge 30 Decorative cover 31 One end 32 Back surface 33 Top surface 34 Other end 35 First slope 36 Side edge 37 Second slope 40 Anchor member 41 Main body 42 Slit 43 Mounting recess 44 One opening edge of the slit 45 Fixture 46 Fixture Insertion hole 47 Flange portion 48 Fixture 49 Chamfer D Swinging door D1 Surface D2 One side D3 Recess D4 Opening F Door frame F1 One side F2 Inner surface H Hinge S Door stop

Claims (6)

A door closer that always biases a swinging door, which is pivotally attached to one side of a door frame via a hinge, in a closing direction,
It is composed of a strip-shaped elastic piece, and one end of the elastic piece serves as a fixed part that is fixed to the one side of the door frame, while the other end of the elastic piece is a free end, so that the hinged door can be fixed to the door frame. an elastic member serving as a biasing portion that constantly biases the hinged door in the closing direction by the elastic restoring force of the elastic piece while in sliding contact with the surface of the elastic member;
a restoring force transmission member that is attached to the swinging door so as to straddle the biasing portion and transmitting the elastic restoring force of the elastic piece to the swinging door;
A door closer characterized by being equipped with. The door closer according to claim 1,
A locking portion that protrudes in a direction intersecting a longitudinal direction of the elastic member is provided at a tip of the free end of the elastic member,
The door closer is characterized in that the restoring force transmitting member engages with the locking portion when the hinged door is in a predetermined fully open state. The door closer according to claim 1 or 2,
The door closer further includes a decorative cover that is provided on the surface of the hinged door and integrally covers the biasing portion of the elastic member and the restoring force transmission member. A door closer that always biases a swinging door, which is pivotally attached to one side of a door frame via a hinge, in a closing direction,
It is composed of a strip-shaped elastic piece, and one end of the elastic piece serves as a fixed part that is fixed to the one side of the door frame, while the other end of the elastic piece is a free end, so that the hinged door can be fixed to the door frame. an elastic member serving as a biasing portion that always biases the hinged door in the direction of closing when it is removably inserted into a recess formed on one side;
A slit is provided in the opening of the recess of the hinged door to allow insertion and removal of the biasing portion of the elastic member, and the slit is provided in the opening of the recess of the hinged door to guide the insertion/removal posture of the elastic member in the recess of the hinged door and to reduce the elasticity of the elastic piece. a restoring force transmission member that transmits restoring force to the hinged door;
A door closer characterized by being equipped with. The door closer according to claim 4,
A locking portion that protrudes in a direction intersecting a longitudinal direction of the elastic member is provided at a tip of the free end of the elastic member,
The restoring force transmitting member is provided with a withdrawal prevention portion at one end of the slit that allows the locking portion to enter the recess but prevents the locking portion from coming out of the recess. A door closer that is characterized by: The door closer according to any one of claims 1, 2, 4, or 5,
A door closer further comprising an anchor member attached to the fixing portion of the elastic member and embedded in an inner surface of one side of the door frame.

Images