JP4677325B2 - Door closer stop mechanism - Google Patents

Description

  The present invention relates to a door closer stop mechanism capable of switching between an operating state and a released state.

  The stop mechanism of the door closer is a mechanism that holds the door in a predetermined open state against the closing force of the door closer. For example, there is a case where a door closer with a stop mechanism is used for a door of an apartment house. In the construction of a new housing complex, people involved in the construction work frequently go in and out of the room during construction, so if the door closer stop mechanism is activated and the door can be held in a certain open state, the construction personnel will go in and out. It becomes easy to do and can improve the efficiency of construction. However, since the door of the apartment house must not be kept open for disaster prevention reasons, the stop mechanism of the door closer must be released after the apartment house is completed. As described above, the door closer stop mechanism may require switching between the operating state and the release state. For convenience, a door closer that can be switched between the operating state and the release state of the stop mechanism by lever operation has been conventionally used. A stop mechanism has been developed (see, for example, Patent Document 1).

  The conventional door closer stop mechanism includes a stop mechanism main body that constitutes a part of the door closer arm, a bracket that is rotatably connected to the stop mechanism main body by a rotary shaft, and is provided on the bracket and faces the engaging element. A stop cam having an engaging portion formed on the peripheral edge thereof, an engaging member provided at the bracket side of the stop mechanism main body so as to be movable forward and backward, and slidable within the main body of the stop mechanism. A presser member that is provided and presses the other end of the spring and a lever that moves the presser member are provided.

  The stop mechanism of the conventional door closer is configured to change the compression amount of the spring by moving the pressing member with a lever, and to switch between the operation state and the release state of the stop mechanism. The state in which the presser member is pushed in the direction of contraction of the spring by the lever and the spring is preliminarily compressed (pre-compression) is the operating state. On the other hand, the state where the lever is returned and the presser member can be moved in the extension direction of the spring and the pre-compression of the spring is loosened is the release state.

When the engagement element engages with the engagement portion of the stop cam, the spring is compressed (pressurized and compressed) by the engagement element. In the operating state, the compression amount during operation, which is the sum of the pre-compression amount and the compression amount of the spring, is set to be equal to or greater than the compression amount of the spring necessary for holding the door, and the door is opened to a predetermined degree. Hold in the door state. On the other hand, in the release state, the compression amount at release, which is the sum of the pre-compression amount and the compression amount of the spring, is set to be less than the compression amount of the spring necessary to hold the door. Even if the door is opened, the door is not held in the open state and is closed by the closing force of the door closer.
Japanese Utility Model Publication No. 60-48579

  However, the conventional door closer stop mechanism is configured to change the pre-compression amount of the spring by operating the lever to switch between the operating state and the releasing state of the stop mechanism. In particular, in order to switch from the released state to the activated state, the pre-compression amount of the spring must be increased by operating the lever. At this time, the spring force of the strong spring acts on the lever as it is through the pressing member. Therefore, in order to switch between the operation state and the release state of the stop mechanism, the lever must be operated with a very large operating force, and it is extremely difficult to switch between the operation state and the release state of the stop mechanism. There was one problem to be solved.

  Further, the lever protrudes from the main body of the stop mechanism, which impairs the appearance of the door closer. In particular, for the purpose of reducing the operating force, the portion protruding to the outside of the main body of the stop mechanism is lengthened, which further impairs the appearance of the door closer.

  The present invention has been made in view of the above problems, and its first object is to reduce the operating force required to switch between the operating state and the releasing state of the stop mechanism, It is an object of the present invention to provide a door closer stop mechanism capable of easily switching a release state.

  A second object is to provide a door closer stop mechanism having a good appearance.

In order to achieve the object, in the invention according to claim 1, a stop mechanism main body constituting a part of an arm of the door closer,
A holding portion that is rotatably connected to the stop mechanism main body by a rotation shaft;
An engaging element provided to be movable forward and backward on the holding part side of the stop mechanism main body;
A spring provided inside the stop mechanism main body and biasing the engaging element;
A holding cam, and a stop cam having an engaging portion formed on a peripheral edge facing the engaging element;
The stop mechanism main body and the holding portion rotate relative to each other according to the opening and closing of the door, and the engaging member engages with the engaging portion of the stop cam, so that the spring is compressed more than the compression amount necessary to hold the door. And a door closer stop mechanism that holds the door in a predetermined open state,
A support member provided movably inside the stop mechanism main body and penetrating the spring;
A spring receiving portion provided on the support member and supporting one end of the spring;
A passive portion that is slidably provided on the support member, abuts against the other end portion of the spring, sandwiches the spring together with the spring receiving portion, and transmits the movement of the engagement member abutted against the stop cam to the spring;
A restricting portion provided on the support member, restricting movement of the passive portion in the extension direction of the spring, and applying pre-compression to the spring by the spring receiving portion and the passive portion;
Switching means for switching the position at which the support member is supported in the main body of the stop mechanism at least between the operation position and the release position;
In a state where the engagement element faces the release area of the stop cam, the spring is not pressurized and compressed by the engagement element, and the position of the support member can be switched between the operation position and the release position by the switching means. ,
When the engaging element is engaged with the engaging portion of the stop cam and the position of the support member is in the operating position, the operating compression amount, which is the sum of the precompression amount and the compression amount of the spring, holds the door. It becomes more than the amount of spring compression necessary for
When the engagement element is engaged with the engaging portion of the stop cam and the position of the support member is the release position, the release compression amount that is the sum of the pre-compression amount and the compression amount of the spring holds the door. Therefore, the stop mechanism of the door closer that can be switched between the operation state and the release state is obtained because the amount of compression of the spring is less than that required.

According to a second aspect of the present invention, in the first aspect of the present invention, when the support member is in the operating position, the engagement member and the stop cam come into contact with each other and pressure compression starts to be applied to the spring. If the initial position of the engaging element is the initial position of the operating state and the position of the engaging element in the state where the engaging element is engaged with the engaging portion of the stop cam is the final reaching position, the engaging element reaches the final position from the initial position of the operating state. The operating position of the support member so that the compression amount during operation, which is the sum of the pressure compression amount and the precompression amount until reaching the position, is equal to or greater than the spring compression amount necessary to hold the door. Is set,
In the state where the support member is in the release position, when the initial position of the engagement element when the engagement element and the stop cam come into contact and pressure compression is applied to the spring is defined as the release state initial position, the engagement element is in the release state. Support so that the compression amount at release, which is the sum of the pressure compression amount and pre-compression amount of the spring from the initial position to the final arrival position, is less than the compression amount of the spring necessary to hold the door The position at the time of releasing the member is set.

  According to a third aspect of the present invention, in the invention according to any one of the first to second aspects, the switching means abuts during operation in which the switching member abuts against the end of the support member in the operating state to support the support member. And an operation body provided with a release contact portion that contacts the end of the support member in the released state and supports the support member, and supports the operation body by operating the operation body from outside the stop mechanism main body. The position where the member is supported can be changed to the contact portion during operation or the contact portion during release.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the operation body is formed with an operation cam having an operation contact portion and a release contact portion, and the stop mechanism mainly includes a stop cam. It is provided inside so as to intersect the moving direction of the support member, and by rotating the operating body, the position for supporting the support member can be changed to the contact portion during operation or the contact portion during release.

  According to a fifth aspect of the present invention, in the invention according to any one of the third to fourth aspects, the switching means includes a grip portion for operating the operating body from the outside of the stop mechanism main body. did.

(Function)
Therefore, in the first aspect of the present invention, the spring is pre-compressed (pre-compressed) by the passive portion and the spring receiving portion provided on the support member, and the switching means is such that the support member is supported within the stop mechanism main body. The at least one position is switched between the operation position and the release position. In a state where the engagement element faces the release region of the stop cam, the spring moves without being subjected to compression (pressure compression) by the engagement element when the supporting position of the support member is switched by the switching means. For this reason, when the switching means is operated, the elastic force of the spring does not act on the switching means.
When the engaging element is engaged with the engaging portion of the stop cam and the position of the support member is in the operating position, the operating compression amount, which is the sum of the precompression amount and the compression amount of the spring, holds the door. Therefore, the door is held in a predetermined open state because the amount of compression of the spring is greater than that required.
When the engagement element is engaged with the engaging portion of the stop cam and the position of the support member is the release position, the release compression amount that is the sum of the pre-compression amount and the compression amount of the spring holds the door. Therefore, even if the door is opened to a predetermined open state, the door is not held in the open state and is closed by the closing force of the door closer.

In the invention according to claim 2, the spring is pre-compressed (pre-compressed) by the passive portion and the spring receiving portion provided in the support member, and the switching means is a position where the support member is supported within the main body of the stop mechanism. Is switched to at least the operating position and the releasing position.
In a state where the engagement element faces the release region of the stop cam, the spring moves without being subjected to compression (pressure compression) by the engagement element when the supporting position of the support member is switched by the switching means. For this reason, when the switching means is operated, the elastic force of the spring does not act on the switching means.
When the position of the support member is the operating position, the operating compression amount, which is the sum of the pressure compression amount and the precompression amount of the spring from the initial position of the operating state to the final position, holds the door. Therefore, the door is held in a predetermined open state because it is equal to or greater than the compression amount of the spring necessary for this.
On the other hand, when the support member is in the release position, the release compression amount, which is the sum of the pressure compression amount and the pre-compression amount of the spring from the initial position of the engagement state to the final arrival position, Since the amount of compression of the spring necessary for holding is less than the predetermined amount, even when the door is opened to a predetermined open state, the door is not held in the open state but is closed by the closing force of the door closer.

  According to a third aspect of the present invention, the switching means is in contact with the end portion of the support member in the operating state to support the support member, and is supported in contact with the end portion of the support member in the released state. An operation body having a release contact portion that supports the member, and the operation body is operated from outside the stop mechanism main body so that the position where the support member is supported is contacted during operation or contact during release. Change to part. Thus, the support position of the support member is switched at least between the operation position and the release position, and the operation state and the release state of the stop mechanism are switched.

  In the invention according to claim 4, the operation body is formed with an operation cam having an operation contact portion and a release contact portion, and inside the stop mechanism main body in the moving direction of the support member. It is provided so as to intersect, and by rotating the operating body, the position for supporting the support member is changed to the contact part for operation or the contact part for release. Thus, the support position of the support member is switched at least between the operation position and the release position, and the operation state and the release state of the stop mechanism are switched.

  In the fifth aspect of the present invention, the switching means includes a grip portion for operating the operating body from the outside of the stop mechanism main body, and the position at which the support member is supported is operated by operating the grip portion. Change to the contact part or the contact part at the time of release. Thus, the support position of the support member is switched at least between the operation position and the release position, and the operation state and the release state of the stop mechanism are switched.

  According to the first to fifth aspects of the invention, when the switching mechanism is operated to switch the stop mechanism between the operation state and the release state, the engagement element faces the release region of the stop cam. The spring moves without receiving compression (pressure compression) by the engaging element. For this reason, when operating the switching means, the elastic force of the spring does not act on the switching means, the switching means can be operated with a light operating force, and switching between the operating state and the release state of the stop mechanism is easy. Can be done.

  Further, since the operation of the switching means can be performed with a light operating force, it is not necessary to project the switching means largely outside the main body of the stop mechanism for the purpose of reducing the operating force. For this reason, the appearance of the stop mechanism of the door closer can be improved.

  Embodiments of the present invention will be described with reference to the drawings.

  A first embodiment of the present invention will be described with reference to FIGS. The stop mechanism S of the door closer according to the first embodiment includes a stop mechanism main body 1, a bracket D as a holding portion, an engagement element 2, a spring 3, a stop cam 6, a support member 4, a spring receiving portion 41, a passive portion 42, and a restriction. Part 43 and switching means 5.

  As shown in FIG. 1, the arm A of the door closer includes a main arm B, an adjustment screw rod C, and a stop mechanism main body 1. The stop mechanism main body 1 is a member constituting a part of the arm A of the door closer. A bracket D as a holding portion is connected to the left side of the stop mechanism main body 1 in the figure, and an adjustment screw rod C is connected to the right side of the stop mechanism main body 1 in the figure. In the following description, the bracket D side of the stop mechanism main body 1 will be described as the front, and the adjustment screw rod C side of the stop mechanism main body 1 will be described as the rear.

  As shown in FIG. 2, the stop mechanism main body 1 has a hollow portion 11 and a plate-like portion 12. The hollow portion 11 has a substantially cylindrical shape, and an opening 13 is formed at the front end portion for the advancement / retraction of the engagement element 2. The plate-like portion 12 extends in the axial direction from the lower edge portion of the opening 13, and the plate-like portion 12 is formed with a hole through which the rotating shaft 16 for connection with the bracket D is inserted. In the vicinity of the rear end of the hollow portion 11, a mounting hole 14 is provided to penetrate the switching means 5 in a direction orthogonal to the axis of the hollow portion 11.

  As shown in FIG. 1, the bracket D is a member that connects the door closer arm A and the door mounting frame, and has the same configuration as the bracket used in the conventional door closer stop mechanism. The bracket D is attached to the upper side of the door attachment frame by attachment means such as screws. A hole through which the rotating shaft 16 is inserted is formed in the bracket D, and the bracket D and the stop mechanism main body 1 are rotatably connected by the rotating shaft 16. In the present embodiment, the stop mechanism S of the door closer is configured between the bracket D as the holding portion and the stop mechanism main body 1, but the main arm B and the stop mechanism main body 1 are connected to each other. A stop mechanism S of the door closer can be configured with the stop mechanism main body 1. In this case, the main arm B corresponds to the holding unit.

  As shown in FIG. 2, the engagement element 2 is a member that engages with the stop cam 6, and has the same configuration as the engagement element used in the stop mechanism of the conventional door closer. The engagement element 2 is a metal sphere, and is provided in the vicinity of the opening 13 of the hollow part 11 of the stop mechanism main body 1 so as to freely advance and retract. A drop-off preventing screw 15 is provided on the plate-like portion 12 and abuts against the engaging element 2 protruding from the opening 13 to prevent the engaging element 2 from being pulled out of the stop mechanism main body 1.

  The spring 3 is a member that exerts the elastic force necessary to hold the door by pressing the engaging element 2 against the engaging portion 61 of the stop cam 6. The spring 3 is movably provided in the hollow portion 11 of the stop mechanism main body 1. In this embodiment, the spring constant is about 5 kgf / mm, and the natural length is about 70 mm. At the time of assembling, the spring receiving part 41 and the passive part 42 are sandwiched by being compressed by about 16 mm.

  As shown in FIG. 4, the stop cam 6 is a portion that engages with the engagement element 2 to hold the door at a predetermined opening angle, and is a stop cam used in a stop mechanism of a conventional door closer. It is the same composition. An engaging portion 61 is formed on the periphery of the stop cam 6 at a position facing the engaging element 2. A portion that does not come into contact with the engagement element 2 is defined as a release region 62. The stop cam 6 can change the mounting angle of the bracket D with respect to the rotary shaft 16 so that the door opening angle can be changed.

  As shown in FIG. 2, the support member 4 is a member for supporting the spring 3 inside the stop mechanism main body 1. The support member 4 penetrates the spring 3 and is provided movably inside the stop mechanism main body 1. The front end portion of the support member 4 protrudes from the front end portion of the spring 3, and the rear end portion of the support member 4 protrudes from the rear end portion of the spring 3. The front end portion of the support member 4 is a portion where the passive portion 42 and the limiting portion 43 are provided, and a male screw portion is formed. The rear end portion of the support member 4 is a portion that contacts the operating body 51 of the switching means 5.

  As shown in FIG. 2, the spring receiving portion 41 is a member that is provided on the support member 4 and supports one end of the spring 3. The spring receiving portion 41 is formed integrally with the support member 4 in the vicinity of the rear end portion of the support member 4. The spring receiving portion 41 has a disk shape, is movable within the stop mechanism main body 1, and has a shape capable of supporting the rear end portion of the spring 3. The spring receiving portion 41 may not be formed integrally with the support member 4 and may be a separate member. For example, an annular member formed with a female screw is used as the spring receiving portion 41, a male screw is formed near the rear end portion of the support member 4, and the spring receiving portion 41 is screwed near the rear end portion of the support member 4. May be fixed in place

  As shown in FIG. 2, the passive portion 42 is a member that contacts the front end portion of the spring 3 and transmits the movement of the engaging element 2 that contacts the stop cam 6 to the spring 3. The passive portion 42 is slidably provided near the front end portion of the support member 4. The passive portion 42 has a disc shape, and a hole is formed in a substantially central portion, and the front end portion of the support member 4 is inserted. The passive portion 42 is movable inside the stop mechanism main body 1 and has a shape that can support the front end portion of the spring 3.

  As shown in FIG. 2, the restricting portion 43 is a member that restricts movement of the passive portion 42 in the extending direction of the spring 3, holds the spring 3 between the spring receiving portion 41 and the passive portion 42, and gives pre-compression. is there. The limiting portion 43 is formed with a female screw portion that is screwed into the male screw portion at the front end portion of the support member 4. The restricting portion 43 is attached in front of the passive portion 42. The length of the spring 3 can be changed by tightening the limiting portion 43. In the case of the present embodiment, the restricting portion 43 is tightened, and the spring 3 is compressed (pre-compressed) in advance. The spring constant is about 5 kgf / mm, and since the natural length is about 70 mm to about 16 mm, the spring constant is about 80 kgf. The elastic force generated by the pre-compression is supported by the spring receiving portion 41, the passive portion 42 and the limiting portion 43, but when the spring 3 is compressed by the pushing of the engaging element 2 and the passive portion 42 is separated from the limiting portion 43. The elastic force generated by this pre-compression acts on the engaging element 2.

  As shown in FIG. 2, the bush 44 is a member that is interposed between the engagement element 2 and the passive part 42 and transmits the movement of the engagement element 2 to the passive part 42. A recess 45 is formed on the rear end side of the bush 44. The depression 45 prevents the bush 44 from coming into contact with the support member 4 and the restricting portion 43 even when the bush 44 moves rearward, so that the movement of the bush 44 is not hindered by the support member 4 and the restricting portion 43. It is to make. Therefore, when the bush 44 is pushed rearward by the engagement element 2, the bush 44 moves rearward, and the passive portion 42 is moved rearward to compress and compress the spring 3. Although the bush 44 is a separate member from the engagement element 2, these may be formed integrally using a metal material or the like.

  As shown in FIG. 2, the switching unit 5 is a part that switches the stop mechanism S of the door closer between the operation state and the release state by switching the position at which the support member 4 is supported. The switching unit 5 has an operation body 51. As shown in FIG. 3, the operating body 51 is a member having a circular cross section, and is provided so as to pass through the stop mechanism main body 1 and intersect the moving direction of the support member 4 inside the stop mechanism main body 1. An operation cam 52 is formed on the operation body 51, and the operation cam 52 is formed so as to contact the rear end portion of the support member 4. The operation cam 52 is provided so as to be eccentric with respect to the central axis of the operation body 51. An operation contact portion 53 is formed at a position far from the central axis of the operating body 51, and a release contact portion 54 is formed at a position close to the central axis. The operating contact portion 53 is formed with a shallow recess so that the state in which the rear end portion of the support member 4 is in contact is stable. Note that the release contact portion 54 of the operation cam 52 may have a shape that does not protrude from the side portion of the operation body 51, as shown in FIG.

  The operating body 51 is attached by being fitted into an attachment hole 14 penetrating the stop mechanism main body 1. As shown in FIG. 3, one of the mounting holes 14 formed at two locations is formed in a size that allows the operation cam 52 of the operation body 51 to pass therethrough. The operating body 51 is inserted into the stop mechanism main body 1 from the mounting hole 14, and an annular sealing body 55 is press-fitted into the gap between the operating body 51 and the mounting hole 14, and the operating body 51 is attached to the stop mechanism main body 1. A concave portion that fits a tool such as a hexagon wrench or a screwdriver is formed on the lower surface side of the operation body 51 in the drawing so that the operation body 51 can be rotated using the tool.

The setting of the operation contact portion 53 and the release contact portion 54 of the operation cam 52 is as follows. First, the position of the support member 4 and the position of the engagement element 2 will be described.
(1) As shown in FIG. 4, when the support member 4 is supported by the contact part 53 at the time of operation, the support member 4 is pushed forward. The position of the support member 4 in this state is defined as an operating position.
(2) As shown in FIG. 6, when the support member 4 is supported by the release contact portion 54, the support member 4 is supported at the rear. The position of the support member 4 in this state is defined as the release position.
(3) As shown in FIG. 8A, the engagement when the engagement member 2 and the stop cam 6 come into contact with each other and the compression compression starts to be applied to the spring 3 in a state where the support member 4 is in the operating position. The initial position of the joint 2 is defined as an operating state initial position P1.
(4) As shown in FIG. 8C, the engagement when the engagement member 2 and the stop cam 6 come into contact with each other and the compression compression starts to be applied to the spring 3 in the state where the support member 4 is in the release position. The initial position of the combination 2 is defined as a release state initial position P2.
(5) As shown in FIGS. 8B and 8D, the position of the engagement element 2 in a state where the engagement element 2 is pressed backward by the stop cam 6 and engaged with the engagement portion 61 of the stop cam 6. Is the final position P3. Since the final reach position P3 is a state in which the engaging element 2 is pressed rearward by the engaging portion 61 of the stop cam 6, this position is the operating position or the releasing position. Regardless of whether it is present or not.
(6) As shown in FIG. 4, the spring 3 is pre-compressed (pre-compressed) by the spring receiving portion 41 and the passive portion 42 even when the engagement element 2 and the stop cam 6 are not in contact with each other. Is held in a state of giving. This pre-compression amount is defined as a pre-compression amount.
(7) As shown in FIG. 5, when the engagement element 2 and the stop cam 6 come into contact with each other and the engagement element 2 is pushed in, the spring 3 is compressed by the passive portion 42 (pressure compression). This pressure compression amount is defined as a pressure compression amount.

  The operating position of the support member 4 is the operating compression amount that is the sum of the pressure compression amount and the precompression amount of the spring 3 from when the engagement element 2 reaches the final position P3 from the initial operating position P1. Is set to be equal to or greater than the compression amount of the spring 3 necessary to hold the pressure (see FIGS. 8A and 8B).

  The release position of the support member 4 is the release compression amount that is the sum of the compression compression amount and the precompression amount of the spring 3 from when the engagement element 2 reaches the final arrival position P3 from the release state initial position P2. It is set to be less than the compression amount of the spring 3 necessary for holding the door (see FIGS. 8C and 8D).

  Next, the operation of the stop mechanism S of the door closer configured as described above will be described. In the door closer stop mechanism S according to the present embodiment, as shown in FIGS. 4 and 6, the operating body 51 is rotated with a hexagon wrench or a screwdriver when the engagement element 2 faces the release region 62 of the stop cam 6. By operating, the position where the support member 4 is supported is changed to the contact part 53 when operating the cam 52 for operation or the contact part 54 when releasing. As a result, the support position of the support member 4 is switched between the operation position and the release position, and the operation state and the release state of the stop mechanism S are switched.

  When switching the support position of the support member 4 in a state where the engagement element 2 faces the release region 62 of the stop cam 6, that is, when switching the operating state and the release state of the stop mechanism S with the operating body 51, the spring 3 moves without being pressed and compressed by the engaging element 2 while being held between the passive portion 42 and the spring receiving portion 41. For this reason, when the operating body 51 is rotated, the elastic force of the spring 3 does not act on the operating body 51.

  As shown in FIG. 4, in the state where the engagement element 2 faces the release region 62 of the stop cam 6, when the operating body 51 is rotated and the stop mechanism S is activated, the support member 4 is in the activated position. It will be in the state supported. When the door is opened, the stop mechanism main body 1 and the bracket D rotate relative to each other accordingly. As the relative rotation proceeds, the engaging element 2 and the stop cam 6 come into contact with each other, and the spring 3 is pressurized and compressed via the passive portion 42. When the pressure is compressed and the passive part 42 is separated from the restricting part 43, the elastic force of the spring 3 (in this embodiment, the elastic force of about 80 kgf by the pre-compression and the elastic force of the compression by compression) is the passive part 42. It acts on the engagement element 2 via. Further, when the relative rotation between the stop mechanism main body 1 and the bracket D proceeds, the engagement element 2 is engaged with the engagement portion 61 of the stop cam 6 as shown in FIG. In this state, the operating compression amount, which is the sum of the precompression amount and the pressure compression amount of the spring 3, is set to be equal to or greater than the compression amount of the spring 3 necessary for holding the door. Is held in a predetermined open state.

  Next, as shown in FIG. 6, when the engaging element 2 faces the release region 62 of the stop cam 6, when the operation body 51 is rotated to release the stop mechanism S, the support member 4 is released. It is in a state of being supported at the hour position. When the door is opened, the stop mechanism main body 1 and the bracket D rotate relative to each other accordingly. As the relative rotation proceeds, the engaging element 2 and the stop cam 6 come into contact with each other, and the spring 3 is pressurized and compressed via the passive portion 42. When the pressure is compressed and the passive part 42 is separated from the restricting part 43, the elastic force of the spring 3 (in this embodiment, the elastic force of about 80 kgf by the pre-compression and the elastic force of the compression by compression) is the passive part 42. It acts on the engagement element 2 via. When the relative rotation of the stop mechanism main body 1 and the bracket D further proceeds, the engagement element 2 is engaged with the engagement portion 61 of the stop cam 6 as shown in FIG. However, in this state, the release compression amount, which is the sum of the pre-compression amount and the pressure compression amount of the spring 3, is set to be less than the compression amount of the spring 3 necessary for holding the door. Even if the door is opened to a predetermined open state, the door is not held in the open state and is closed by the closing force of the door closer.

  The door closer stop mechanism S according to the embodiment has the following effects.

  When switching the stop mechanism S between the operating state and the release state by the operating body 51, that is, when switching the support position of the support member 4, the spring 2 is in a state where the engagement element 2 faces the release region 62 of the stop cam 6. 3 moves without being subjected to compression (pressure compression) by the engagement element 2. For this reason, when the operating body 51 is rotated, the elastic force of the spring 3 does not act on the operating body 51, and the operating body 51 can be operated with a light operating force. Switching between the state and the release state can be easily performed.

  The operation means does not protrude outside the stop mechanism main body 1, and the appearance of the stop mechanism S of the door closer can be improved.

  Next, a second embodiment of the present invention will be described with reference to FIG. This embodiment is greatly different from the first embodiment in that the gripping portion 56 is provided in the switching means 5. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 10, a grip portion 56 is provided on the operation body 51 of the switching unit 5. The gripping part 56 is a part for operating the operating body 51 with fingers from the outside of the stop mechanism main body 1. For example, the gripping portion 56 is attached to the operating body 51 by forming a concave portion in the operating body 51, forming a convex portion in the gripping portion 56, and attaching the operating body 51 to the stop mechanism main body 1. This is done by means such as press-fitting the convex portion.

  According to the stop mechanism S of the door closer according to the second embodiment, it is possible to rotate the operating body 51 by rotating the grip portion 56 with fingers without using a tool such as a hexagon wrench or a screwdriver. It is possible to switch between the operation state and the release state of the stop mechanism S by changing the position for supporting the contact mechanism 53 at the time of operation or the contact portion 54 at the time of release.

1 is a simplified cross-sectional view of a stop mechanism S for a door closer according to Embodiment 1. FIG. It is the cross-sectional simplified view which expanded the stop mechanism S of the door closer. FIG. 6 is a perspective view showing an assembled state of the stop mechanism main body 1 and the operation body 51. FIG. 4 is a cross-sectional view (a) in a state where the position of the support member 4 is the operating position and the engaging element 2 faces the release region 62 of the stop cam 6, and a plan view (b) with a part omitted. FIG. 4 is a cross-sectional view (a) in a state in which the position of the support member 4 is the operating position, and the engaging element 2 is engaged with the engaging portion 61 of the stop cam 6, and a plan view (b) with a part omitted. FIG. 4 is a cross-sectional view (a) in a state in which the position of the support member 4 is a release position, and the engagement element 2 faces the release region 62 of the stop cam 6, and a plan view (b) with a part omitted. FIG. 4 is a cross-sectional view (a) in a state in which the position of the support member 4 is set to the release position, and the engaging element 2 engages with the engaging portion 61 of the stop cam 6, and a plan view (b) with a part thereof omitted. FIG. 6 is a plan view showing the position of the engagement element 2. (A) is an operation state that is an initial position of the engagement element 2 when the engagement element 2 and the stop cam 6 come into contact with each other and pressure compression starts to be applied to the spring 3 in a state in which the support member 4 is in the operation position. The initial position P1 is shown. (B) shows the final reach position P3 which is the position of the engagement element 2 when engaged with the engagement portion 61 of the stop cam 6 in a state where the support member 4 is in the operating position. (C) is a release state which is an initial position of the engagement element 2 when the engagement element 2 and the stop cam 6 come into contact with each other and pressure compression is started to be applied to the spring 3 in a state where the support member 4 is in the release position. The initial position P2 is shown. (D) shows the final reach position P3 which is the position of the engagement element 2 when engaged with the engagement portion 61 of the stop cam 6 in a state where the support member 4 is in the release position. It is a perspective view which shows the operation body 51 which concerns on another example. It is a cross-sectional simplified view of the stop mechanism S of the door closer according to the second embodiment.

Explanation of symbols

S Stop mechanism for door closer A Arm B Main arm C Adjusting screw rod D Bracket 1 as holding part Stop mechanism main body 11 Hollow part 12 Plate-like part 13 Opening part 14 Mounting hole 15 Screw for preventing drop 16 Rotating shaft 2 Engagement element 3 Spring 4 Support member 41 Spring receiving portion 42 Passive portion 43 Limiting portion 44 Bushing 45 Recessed portion 5 Switching means 51 Operating body 52 Operating cam 53 Contacting portion 54 during operation Contacting portion 55 during release 55 Sealing body 56 Holding portion 6 Stop cam 61 Engaging portion 62 Stop cam release region P1 Operating state initial position P2 Release state initial position P3 Final position

Claims (5)

A stop mechanism main body constituting a part of the arm of the door closer;
A holding portion that is rotatably connected to the stop mechanism main body by a rotation shaft;
An engaging element provided to be movable forward and backward on the holding part side of the stop mechanism main body;
A spring provided inside the stop mechanism main body and biasing the engaging element;
A holding cam, and a stop cam having an engaging portion formed on a peripheral edge facing the engaging element;
The stop mechanism main body and the holding portion rotate relative to each other according to the opening and closing of the door, and the engaging member engages with the engaging portion of the stop cam, so that the spring is compressed more than the compression amount necessary to hold the door. And a door closer stop mechanism that holds the door in a predetermined open state,
A support member provided movably inside the stop mechanism main body and penetrating the spring;
A spring receiving portion provided on the support member and supporting one end of the spring;
A passive portion that is slidably provided on the support member, abuts against the other end portion of the spring, sandwiches the spring together with the spring receiving portion, and transmits the movement of the engagement member abutted against the stop cam to the spring;
A restricting portion provided on the support member, restricting movement of the passive portion in the extension direction of the spring, and applying pre-compression to the spring by the spring receiving portion and the passive portion;
Switching means for switching the position at which the support member is supported in the main body of the stop mechanism at least between the operation position and the release position;
In a state where the engagement element faces the release area of the stop cam, the spring is not pressurized and compressed by the engagement element, and the position of the support member can be switched between the operation position and the release position by the switching means. ,
When the engaging element is engaged with the engaging portion of the stop cam and the position of the support member is in the operating position, the operating compression amount, which is the sum of the precompression amount and the compression amount of the spring, holds the door. It becomes more than the amount of spring compression necessary for
When the engagement element is engaged with the engaging portion of the stop cam and the position of the support member is the release position, the release compression amount that is the sum of the pre-compression amount and the compression amount of the spring holds the door. Therefore, the door closer stop mechanism can be switched between an operating state and a released state because the amount of compression of the spring is less than the required amount. In the state where the support member is in the operating position, the initial position of the engaging element when the engaging element and the stop cam come into contact with each other and pressure compression starts to be applied to the spring is set as the operating state initial position, and the engaging element is the stop cam. Assuming that the position of the engagement element in the state engaged with the engagement portion is the final arrival position, the sum of the pressure compression amount and the pre-compression amount of the spring until the engagement element reaches the final arrival position from the initial operation position. The operating position of the support member is set so that the operating compression amount is equal to or greater than the compression amount of the spring necessary to hold the door,
In the state where the support member is in the release position, when the initial position of the engagement element when the engagement element and the stop cam come into contact and pressure compression is applied to the spring is defined as the release state initial position, the engagement element is in the release state. Support so that the compression amount at release, which is the sum of the pressure compression amount and pre-compression amount of the spring from the initial position to the final arrival position, is less than the compression amount of the spring necessary to hold the door The stop mechanism of the door closer according to claim 1, wherein a release position of the member is set.   The switching means includes an operation contact portion that contacts the end portion of the support member in the operating state and supports the support member, and a release contact portion that contacts the end portion of the support member and supports the support member in the release state. And a position for supporting the support member can be changed to a contact part at the time of operation or a contact part at the time of release by operating the operation body from outside the main body of the stop mechanism. Item 3. A door closer stop mechanism according to any one of Items 1 to 2.   The operating body is formed with an operating cam having a contact portion at the time of operation and a contact portion at the time of release, and is provided inside the stop mechanism main body so as to intersect the moving direction of the support member. 4. The door closer stop mechanism according to claim 3, wherein the position of supporting the support member can be changed to a contact part during operation or a contact part during release by rotating the operating body.   5. The door closer stop mechanism according to claim 3, wherein the switching unit includes a grip portion for operating the operating body from outside the main body of the stop mechanism. 6.

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