JP2003184417A - Arm member connecting structure for door closer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve workability at a site besides securing the improvement of productivity. <P>SOLUTION: This arm member connecting structure for a door closer 10 for connecting a door side arm 40 and a frame side arm 50 rotatably to each other at their end parts is provided with a link shaft 71 fixed to the end part of the door side arm 40 and extending in a direction of the rotational center; a tip side swing member 62 swingingly provided at the end part of the frame side arm 50 and fitted to the outside rotatably around the link shaft 71; and a locking shaft mounted to the link shaft 71 and having a head 73b for preventing slip-off of the tip side swing member 62 from the link shaft 71. The locking shaft is constituted to allow the tip side swing member 62 to be attached to and detached from the supporting shaft 71 in a single operation with the radial contraction and expansion of the head 73 by elastic deformation. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closer including a first arm member attached to a door side via a closer body and a second arm member attached to a door frame side via a bracket. The present invention relates to an arm member connecting structure of a door closer that connects ends of arm members.

[0002]

2. Description of the Related Art Conventionally, a door closer 1 as shown in FIG.
00 is known. This door closer 100 includes a door D that is attached so as to be rotatable around a hinge, and a door D
Is provided between the frame F and the frame F into which it is fitted to stabilize the opening / closing operation of the door D and to maintain the closed state and the open state at a predetermined angle (usually 90 °). A closer body 101 in which a predetermined biasing mechanism and a braking mechanism are mounted on the D side, a first arm member 102 rotatably connected to the closer body 101 about a predetermined axis, and a frame F. A bracket 103 to be fixed, a second arm 104 rotatably connected to the bracket 103 around a predetermined axis (vertical axis 103a), and a connecting structure 110 for connecting the ends of the arms 102 and 104 to each other. It is configured with.

The connecting structure 110 includes the first arm member 1.
Support shaft 1 fixed to the end of 02 so as to extend in the vertical direction
11 and a swinging member 112 fitted onto the support shaft 111.
And a retaining bolt 113 for preventing the swinging member 112 externally fitted to the support shaft 111 from coming off. The swing member 112 has a horizontal shaft 1 at the end of the second arm 104.
It is rotatably supported around 12a. A swinging member 115 similar to the swinging member 112 is also provided on the base end side of the second arm 104 so as to be rotatable around a horizontal shaft 115 a, and the swinging member 115 is a vertical shaft hanging from the bracket 103. It is attached rotatably around 103a. The horizontal axis 112 of these rocking members 112, 115
The twist generated when the swing member 112 is fitted onto the support shaft 111 by the rotation around a and 115a is absorbed.

The retaining bolt 113 is screwed into a screw hole (not shown) provided on the upper end surface of the support shaft 111. The retaining bolt 113 can interfere with the swing member 112. Each arm 102, 1 is screwed and fastened to a screw hole via a washer 113a having a diameter dimension.
04 is connected via a connecting structure 110 so as to be relatively rotatable around the support shaft 111.

[0005]

In the door closer 100 as described above, the arms 102 and 104 are generally temporarily fixed by screwing the retaining bolts 113 at the time of shipment from the production site. is there. Then, at the installation site of the door closer 100, the retaining bolt 113 is once removed from the support shaft 111 for so-called site alignment, the closer body 101 with the first arm member 102 is fixed to the door D, and the second arm. The bracket 103 with 104 is fixed to the frame F, and the support shaft 1 continues.
After the rocking member 112 has been fitted onto the outside 11, the retaining bolt 1
13 is screwed and fastened to the support shaft 111 again.

[0006] In such a construction method, at the installation site of the door closer 100, the removal and tightening operation of the retaining bolt 113 with respect to the support shaft 111 must be performed for many doors, and the door closer 100 can be efficiently used. There was an inconvenience that it could not be constructed in a general way.

In order to eliminate such inconvenience, for example, in Japanese Unexamined Patent Application Publication No. 10-292722, the first arm member (the other arm) 1 is attached to the support shaft (protruding shaft) 111.
The connection structure is configured so that 02 can be attached and detached by one-touch operation. However, in this connection structure, a spherical portion that bulges like a drum drum is formed on the outer peripheral surface of the support shaft 111, or a bearing member having an annular recess whose inner peripheral surface is in sliding contact with this spherical portion is provided. However, there is a problem that productivity is poor.

In Japanese Patent Laid-Open No. 11-141226, a clip capable of holding a support shaft (arm pin) 111 inside a swinging member (adjusting arm) 112 instead of the retaining bolt 113 is internally provided. It is described that the support shaft 111 can be attached to and detached from the swing member 112 by one-touch operation by elastic deformation. However, in order to enable the one-touch operation by internally mounting the clip in the swing member 112 so as to be elastically deformable, the structure of the swing member 112, the clip, and the support shaft 111 becomes complicated, resulting in poor productivity. Have a point.

Further, Japanese Patent Laid-Open No. 2001-214661 describes a C-ring-shaped connecting ring in place of the above-mentioned clip.
The situation is the same as that of the publication No. 1-141226, in particular, an annular ring storage groove for storing the connecting ring has to be provided on the inner peripheral surface of the swing member (bush holder) 112, which makes processing difficult. Therefore, there is a problem that the manufacturing cost increases.

The present invention has been made in view of the above situation, and it is an object of the present invention to provide an arm member connecting structure for a door closer that can improve workability in the field while ensuring improvement in productivity. Has an aim.

[0011]

The invention according to claim 1 is
In the arm member connecting structure of the door closer, which rotatably connects the first arm member on the door side and the second arm member on the frame side of the door to each other at their ends, the first arm member is fixed to the end of one arm member. A spindle extending in the direction of the center of rotation,
A swinging member that is swingably provided at the end of the other arm member and that is externally fitted so as to be rotatable around the support shaft, and a head for preventing the swinging member from slipping off from the support shaft. The retaining shaft is attached to the supporting shaft, and the retaining shaft is elastically deformed to expand and contract the head portion in the radial direction so that the swinging member can be attached to and detached from the supporting shaft by one-touch operation. It is characterized in that it is configured to be able to.

According to the present invention, since the swing member is provided at the end of one arm member, an appropriate distance is provided between the arm members due to an error in the mounting position of each arm member when the door closer is installed on site. Even if it is not, it is possible to absorb the above error by swinging the swinging member, which causes the twisting of the arm member that occurs when the arm members are connected without the swinging member. Is eliminated. Moreover, the retaining shaft is constructed so that the swinging member can be attached to and detached from the support shaft by one-touch operation by elastically deforming and expanding the head in the radial direction. The workability of is improved.

Further, since the support shaft may be a straight support shaft, in comparison with the case of manufacturing a conventional support shaft having a spherical surface processed to enable one-touch operation,
Door closers are easier to manufacture.

According to a second aspect of the present invention, there is provided a door closer arm member connecting structure for rotatably connecting the door side first arm member and the door frame side second arm member to each other at their ends. A support shaft fixed to the end of one arm member and extending in the direction of the center of rotation, and a swing provided at the end of the other arm member so as to be swingable, and externally fitted rotatably around the support shaft. And a member, the support shaft,
The rocking member has a locking projection that locks the rocking member from slipping out of the support shaft, and is structured such that the rocking member can be attached and detached by one-touch operation by elastically deforming and expanding the locking projection. It is characterized by that.

According to the present invention, since the swing member is provided at the end of one arm member, an appropriate distance is provided between the arm members due to an error in the mounting position of each arm member in the field construction of the door closer. Even if it is not, it is possible to absorb the above error by swinging the swinging member, which causes the twisting of the arm member that occurs when the arm members are connected without the swinging member. Is eliminated. Moreover, the support shaft has a locking projection that locks the swinging member from slipping out of the support shaft, and elastically deforms the locking projection in the radial direction to allow the swinging member to be attached and detached by one-touch operation. As a result, the workability of installing the door closer in the field is improved.

Further, since the support shaft may be a straight support shaft, in comparison with the case of manufacturing a conventional support shaft having a spherical surface processed to enable one-touch operation,
Door closers are easier to manufacture.

According to a third aspect of the present invention, there is provided a door closer arm member connecting structure for rotatably connecting the first arm member on the door side and the second arm member on the frame side of the door at their ends. A support shaft fixed to the end of one arm member and extending in the direction of the center of rotation, an annular elastic member externally fitted and fixed to this support shaft, and swingably provided at the end of the other arm member, A rocking member rotatably fitted around the annular elastic member is provided, and the annular elastic member has a locking portion that locks the rocking member from coming out of the annular elastic member. The rocking member is configured to be attached and detached by one-touch operation by elastically deforming the member to expand and contract the locking portion in the radial direction.

According to the present invention, since the swing member is provided at the end portion of one arm member, an appropriate distance is provided between the arm members due to an error in the mounting position of each arm member when the door closer is installed in the field. Even if it is not, it is possible to absorb the above error by swinging the swinging member, which causes the twisting of the arm member that occurs when the arm members are connected without the swinging member. Is eliminated. Moreover, the annular elastic member has a locking portion that locks the swinging member from coming out of the annular elastic member, and the elastic deformation of the annular elastic member causes the locking portion to expand and contract in the radial direction, so that the one-touch operation is possible. Since the swinging member can be attached and detached, the workability of installing the door closer on site is improved.

Further, since the support shaft may be a straight support shaft, in comparison with the case of manufacturing a conventional support shaft having a spherical surface processed to enable one-touch operation,
Door closers are easier to manufacture.

[0020]

1 is an exploded perspective view showing a door closer in which a connecting structure according to a first embodiment of the present invention is adopted, and FIG. 2 is an assembled perspective view thereof. As shown in these drawings, the door closer 10 includes a closer body 20 fixed to an upper portion of the door D (FIG. 2) and a bracket fixed to the frame body F of the door D so as to face the closer body 20 vertically. 30 (FIG. 2), a door side arm (first arm member) 40 whose base end side (left side in FIGS. 1 and 2) is connected to the closer body 20, and a position above the door side arm 40. A frame side arm 50 whose base end side is connected to the door building frame F (FIG. 2), a pair of swing members 60 connected to each end of the frame side arm 50, and these door side arms 40.
And a connecting member 7 that connects the front ends of the frame-side arms (second arm members) 50 to each other so as to be rotatable relative to each other and that is provided between the base end of the door-side arm 40 and the bracket 30.
It has a basic configuration of 0 and 0.

The closer body 20 applies an urging force to the door side arm 40 so as to receive a force in the direction in which the door D is closed, and resists the urging force when the door D is opened by approximately 90 °. The door-side arm 40 is then braked to maintain the open state of the door D. An urging mechanism and a braking mechanism for realizing these are provided inside, and the center of the upper surface is substantially centered. A biasing shaft 21 is provided at the position so as to project to the outside and extend in the vertical direction. The base end of the door side arm 40 is connected to the biasing shaft 21 so as to be rotatable together, and the biasing force of the biasing mechanism and the braking force of the braking mechanism are transmitted to the door side arm 40 via the biasing shaft 21. It has become so.

The bracket 30 has a closer body 20.
It is fixed to the frame body F so as to face the closer body 20 at a position above. The bracket 30 is for supporting the base end portion of the frame side arm 50, and has a connecting member 70 (the base end side connecting member 7 which will be described later in detail) at the tip end portion.
The fixing hole 31 into which the first shaft 71a of 0a) is fitted is bored. In the state where the first shaft 71a is fitted into the fixing hole 31 and the base end side connecting member 70a is fixed to the bracket 30 by caulking, the base end side of the frame side arm 50 is connected to the base end side connecting member 70a. The frame side arm 5
0 is attached to the bracket 30 in a state in which 0 can be rotated around the base end side connecting member 70a. In addition,
Details of the connecting member 70 will be described later with reference to FIG.

The door-side arm 40 is formed of a long flat plate and is bent so that the tip side (right side in FIGS. 1 and 2) is located slightly below. The door-side arm 40 has a square-shaped square hole 41 on the base end side in plan view.
And a fixing hole 4 into which a part (link shaft 71, which will be described later) of the connecting member 70 is internally fitted and fixed.
2 is drilled.

On the other hand, the urging shaft 21 of the closer body 20.
Has a prismatic shape at its upper end, and a screw hole 22 extending in the up-down direction is screwed on the top surface thereof. The prismatic portion of the upper end of the biasing shaft 21 is dimensioned so that it can be fitted into the square hole 41 in a sliding contact state, and the square hole 41 is fitted onto the biasing shaft 21. Set screw 4 having a larger head than the square hole 41 in the screw hole 22
By screwing and fastening 3 together, the door side arm 40 is connected to the urging shaft 21 so as to be able to rotate together.

The frame side arm 50 comprises a cylindrical arm 51 having a cylindrical shape on the base end side and a rod arm 52 having a rod shape on the tip end side. A female screw 53 is screwed on the inner peripheral surface of at least the tip side of the cylindrical arm 51, while a male screw 54 corresponding to the female screw 53 is screwed on the proximal end side of the rod arm 52, and the male screw 5
A nut 55 is screwed onto the No. 4.

The lengthwise dimension of the frame side arm 50 can be adjusted by screwing the male screw 54 onto the female screw 53 and adjusting the screwing amount. After the length dimension of the frame-side arm 50 is set, the nut 55 is rotated toward the tip end side by a rotation operation, and is stopped and fastened to the tip end surface of the cylindrical arm 51, whereby the frame-side arm 5
As shown in FIG. 2, 0 has a length dimension corresponding to the door side arm 40.

A base end side shaft seat 56 is provided at the base end of the cylindrical arm 51 so as to extend outward in the axial direction, and the tip end of the rod arm 52 extends in the axial direction. A tip-side shaft seat 57 formed of a protruding plate piece is provided.
These shaft seats 56 and 57 are for attaching the swinging member 60 to the frame side arm 50.

The swinging member 60 includes a base-side swinging member 61 attached to the base-side shaft seat 56 and a tip-side swinging member 62 attached to the tip-side shaft seat 57. The swinging member 60 has a circular ring portion 63 formed in a circular shape with an opening portion provided in a part, and parallel to each other and protruding outward from each open end of the circular ring portion 63. A pair of clamping pieces 6
It consists of 4.

A pair of sandwiching pieces 64 facing each other
On the other hand, through holes 65 are respectively formed at the opposite positions, and through holes 58 are also formed on the shaft seats 56 and 57, respectively, and the shaft seats 56 and 57 are clamped by a pair of clamping pieces 64. Through the through hole 65 of the swinging member 60 and the shaft seat 56,
The rivet 66 is pierced through the through hole 58 of 57 to be caulked, whereby the base end side swing member 61 and the tip end side swing member 6
2 is connected to the base end side shaft seat 56 and the tip end side shaft seat 57, respectively, so as to be able to swing around the rivet 66.

The inner diameter of the annular portion 63 of the base-side swinging member 61 is slidably fitted onto a portion (a bush 72 described later) of the connecting member 70 fixed to the bracket 30. The tip-side rocking member 62 is dimensioned so that the inner diameter of the annular portion 63 can be externally fitted in the bush 72 of the tip-side connecting member 70 in a sliding contact state. ing. Therefore, the proximal swing member 6
The annular portion 63 of No. 1 is retained by the bush 7 via the shaft member 73.
When the frame side arm 50 is externally fitted to the connecting member 7,
It is connected to the bracket 30 so as to be rotatable about 0. Further, by fitting the annular portion 63 of the tip side swinging member 62 onto the bush 72 of the connecting member 70, the frame side arm 50 is rotatably connected to the door side arm 40 via the connecting member 70. Will be.

3A and 3B are views of a connecting member 70 for explaining the connecting structure of the first embodiment. FIG. 3A is a sectional view in side view and FIG. 3B is a plan view. In this embodiment,
As shown in FIGS. 1 and 2, as the connecting member 70, a base end side connecting member 70a provided on the bracket 30 side,
The leading end side connecting member 70b provided between the leading end portion of the door side arm 40 and the leading end portion of the frame side arm 50 is adopted. However, in FIG. 3, the tip side connecting member 70 is shown as a representative of both.
Only b is shown. The base end side connecting member 70a and the front end side connecting member 70b have exactly the same configuration except that they are used upside down. Therefore, the connecting member 7
Regarding 0, only the distal end side connecting member 70b will be described below, and the description of the proximal end side connecting member 70a will be limited to the necessary minimum.

As shown in FIG. 3, the connecting member 70 (tip side connecting member 70b) has a fixing hole 42 of the door side arm 40.
(In the case of the base end side connecting member 70a, a link shaft (support shaft) 71 fitted in the fixing hole 31 of the bracket 30 and fixed by caulking, and a bush 72 fitted in the link shaft 71. The bush 72 is provided with a retaining shaft member 73 screwed onto the upper end surface of the link shaft 71 while being fitted onto the link shaft 71.

The link shaft 71 includes a first shaft 71a, a second shaft 71b having a diameter slightly larger than the first shaft 71a, and a flange 71c provided between the upper and lower shafts 71a, 71b.
It consists of The first shaft 71a is the door side arm 40.
Has a diameter dimension that allows it to be slidably fitted into the fixed hole 42, and is caulked while the first shaft 71a is fitted into the fixed hole 42 from above, so that the link shaft 71 is attached to the door side arm 40. It is supposed to be fixed. Second shaft 71b
Has its length dimension set slightly longer than the vertical width dimension of the tip side swinging member 62, and has a screw hole 71d for screwing the retaining shaft member 73 at its axial center position. It is set up. The flange 71c has a bush 7 with a diametrical dimension.
It is set to be slightly longer than the outer diameter dimension of 2.

The bush 72 is fitted over the second shaft 71b and functions as a lubricant. For example, a sintered metal body impregnated with lubricating oil or a fluororesin such as polytetrafluoroethylene is used. , Or made of silicone resin or the like. Such a bush 72 has a second shaft 71.
The annular portion 63 of the tip end side swinging member 62 in a state of being fitted onto b.
Is externally fitted to the bush 72 so as to be rotatable around the link shaft 71.

The retaining shaft member 73 has a screw shaft 73a having a male screw corresponding to a female screw screwed into the screw hole 71d of the link shaft 71, and a head 73b formed on the top of the screw shaft 73a. It consists of The head portion 73b is set such that the diameter dimensions of the lower end surface and the upper end surface are substantially the same as the outer diameter dimension of the bush 72, and the outer diameter dimension is gradually increased toward the substantially central portion in the vertical direction. As a result, an annular bulging portion 73c is formed on the peripheral surface of the head portion 73b. The maximum diameter dimension of the annular bulging portion 73c is set larger than the outer diameter dimension of the bush 72. Therefore, the tip-side rocking member 62 fitted on the bush 72 is attached.
Is prevented from coming off by the annular bulging portion 73c screwed to the link shaft 71.

Further, the head 73b is provided with a recessed hole 73d which is concentric with the head 73b on the upper surface thereof, and from the head 73b to the screw shaft 73a, as shown in FIG. A cross-shaped cut groove 73e is provided in a plan view, and the diameter dimension of the head portion 73b can be changed by elastic deformation by expanding or reducing the groove width dimension of the cut groove 73e.

FIG. 4 is an explanatory view for explaining the operation of the first embodiment. (A) shows a state immediately before the tip side swinging member 62 is attached to the connecting member 70, (b) shows , A state in which the tip side swinging member 62 is being attached to the connecting member 70,
(C) shows a state in which the tip-side swing member 62 is attached to the connecting member 70.

When the tip end side swinging member 62 is attached to the connecting member 70, as shown in FIG. 4A, the annular portion 63 is first covered on the head portion 73b of the retaining shaft member 73. Then, the annular portion 63 interferes with the annular bulging portion 73c of the head portion 73b having a larger diameter, and is not fitted into the head portion 73b any more.

Then, in this state, when the tip-side swing member 62 is pressed downward, the circular component 63 is generated by the component force.
Since the lower end edge of the head 73b presses the head 73b in the axial direction, the head 73b is elastically deformed by the width reduction of the upper portion of the cut groove 73e, as shown in (b) of FIG. As a result, the annular portion 63 is fitted into the bush 72 via the head portion 73b.

At this time, since the tip end side swinging member 62 rotates relative to the rod arm 52 around the rivet 66, it can be maintained in a horizontal posture at all times, so that the bushing 72 can be fitted properly. Go. In the state where the annular portion 63 is fitted in the bush 72, the retaining shaft member 73 is expanded in its original state as shown in FIG. The swinging member 60 mounted on the connecting member 70 by means of the annular bulging portion 73c
Will be retained by.

The swing member 60 once attached is connected to the connecting member 7.
When removing from 0, the swinging member 60 may be grasped and pulled upward. By doing so, the annular bulging portion 73c of the head portion 73b of the retaining shaft member 73 is fixed to the swinging member 6.
Since the diameter of the rocking member 60 is reduced by being pressed by the upper edge of the annular portion 63 of 0, the swinging member 60 is removed from the connecting member 70 via the state shown in FIG.

According to the connecting structure of the first embodiment, since the swing member 60 is swingably provided around each of the rivets 66 at each end of the frame side arm 50, each arm can be installed in the door closer 10 on site. Even if the distance between the arms 40 and 50 is not an appropriate distance due to an error in the mounting positions of the members 40 and 50, it is possible to absorb the error by swinging the swing member 60. It is possible to eliminate the twisting of the arms 40 and 50 that occurs when the arms 40 and 50 are connected when the swinging member 60 does not exist.

Moreover, since the head portion 73b of the retaining shaft member 73 is provided with the notch groove 73e, the connecting member 70 can be expanded and contracted in the radial direction by elastic deformation so that the connecting member 70 can be expanded and contracted with respect to the bush 72. The swing member 60 can be attached and detached by one-touch operation.
It is possible to improve the workability of the zero mounting work.

Further, since the link shaft 71 employs a straight shape, as compared with the case of manufacturing a conventional support shaft having a spherical surface processed to enable one-touch operation,
The door closer 10 is easily manufactured.

Further, the door closer 10 of the first embodiment is completed by directly adopting the other parts excluding the retaining shaft member 73 in the conventional connection structure and newly manufacturing only the retaining shaft member 73. Therefore, it is possible to contribute to a reduction in manufacturing cost as compared with the case where other components also have to be changed.

Also, the retaining bolts already installed (see FIG. 7)
In the conventional door closer 10 using the reference), by replacing the retaining bolt with the retaining shaft member 73 of the present invention, the conventional door closer 10 can be improved to the door closer 10 of the present invention, and the entire door closer 10 is replaced. Compared with the case, the improvement cost can be significantly reduced.

FIGS. 5A and 5B are views of a connecting member 70a for explaining the connecting structure of the second embodiment. FIG. 5A is a side sectional view and FIG. 5B is a plan view. In the connecting member 70a of this embodiment, the link shaft 71 includes the first shaft 71a,
The same thing as 1st embodiment which consists of the 2nd shaft 71b and the flange 71c is employ | adopted. However, the link shaft 71 of the second embodiment is not provided with the screw hole 71d.

Further, instead of the bush 72 of the first embodiment, the annular locking member 7 made of the same material as the bush 72 is used.
4 has been adopted. The annular locking member 74 includes a bush body 74a corresponding to the bush 72, and a partially broken locking ring 74b concentrically extending upward from the top of the bush body 74a. . The link shaft 71 and the annular locking member 74 form the support shaft of claim 2 of the present invention.

The bush body 74a has a vertical dimension of the second shaft 7.
The dimension is set to be slightly shorter than the length dimension of 1b, and the inner diameter dimension is set to be slightly larger than the diameter dimension of the second shaft 71b so that it can be fitted onto the second shaft 71b. .

On the other hand, the locking ring 74b has an outer diameter dimension slightly larger than the outer diameter dimension of the bush body 74a and an inner diameter dimension larger than the inner diameter dimension of the bush body 74a. There is. By doing this, the top portion of the second shaft 71b is caulked while the bush body 74a is fitted onto the second shaft 71b, so that the caulked portion 71e whose diameter has increased is formed as shown in (a) of FIG. The upper end edge of the body 74a is pressed down, and the annular locking member 74 is prevented from coming off from the link shaft 71.

The locking ring 74b has a locking projection 74c formed by setting the outer diameter of the locking ring 74b so as to gradually increase toward a substantially central portion in the vertical direction, and has a predetermined circumferential direction. A notch groove 74d formed by notching in the vertical direction at a pitch is provided. Due to the presence of the cut groove 74d, when a force directed toward the center is applied to the locking ring 74b, the locking ring 74b can be elastically deformed to reduce its diameter. Therefore, the annular projection 63 of the tip-side rocking member 62 is covered with the locking ring 74b and then pressed downward, whereby the locking projection 74c is generated by the component force.
Is pressed in the axial direction, and the diameter of the locking ring 74b is thereby reduced, so that the annular portion 63 is fitted into the bush body 74a. The annular portion 63 once fitted is provided with the locking projection 7
Due to interference with 4c, it will be in a retaining state.

The other structure of the door closer using the connecting member 70a is similar to that of the first embodiment.

According to the connecting structure of the second embodiment, the locking ring 74b of the annular locking member 74 is caused to have a function of locking the tip-side swinging member 62, and the bush 74a serves as a lubricant. Since it has the above function, it is not necessary to separately employ the retaining shaft member 73 and the bush 72, which contributes to the reduction of the number of parts.

6A and 6B are views of a connecting member 70b for explaining the connecting structure of the third embodiment. FIG. 6A is a sectional view in side view, and FIG. 6B is a partially cutaway plan view. In the connecting member 70b of this embodiment, the link shaft (support shaft) 71
Is the first shaft 71a, the second shaft 71b, and the flange 71c.
The same thing as the second embodiment consisting of is adopted.

Further, instead of the bush 72 of the first embodiment, an annular elastic member 75 having a locking function is adopted. The outer diameter of the annular elastic member 75 is set to be slightly smaller than the inner diameter of the annular portion 63 of the tip-side rocking member 62, and the inner diameter of the second elastic member 71 is in a sliding contact state.
The diameter is set so that it can be fitted onto b. Further, the vertical dimension of the annular elastic member 75 is set to be slightly shorter than that of the second shaft 71b, so that the top of the second shaft 71b is covered with the annular elastic member 75 fitted onto the second shaft 71b. By crimping, the expanded caulking portion 71e presses the upper end edge of the annular elastic member 75 as shown in FIG. 6A, whereby the annular elastic member 75 is prevented from coming off from the link shaft 71. Has become.

The annular elastic member 75 has an annular concave portion 75a which is provided on the inner peripheral surface of the annular elastic member 75 over the entire circumference thereof, thereby facilitating radial compression elastic deformation. On the outer peripheral surface, a plurality of locking projections 75b, which are arcuate in a sectional view and project at a predetermined pitch in the circumferential direction, are provided.

On the other hand, the annular portion 63 of the tip side swinging member 62 is provided with an annular cutout groove 67 corresponding to the locking projection 75b over the entire circumference, and the locking projection 75b is formed in the annular cutout groove. By being fitted in 67, the tip-side swing member 62 can rotate around the annular elastic member 75 in a retaining state.

Therefore, by covering the annular portion 63 of the tip end side swinging member 62 on the annular elastic member 75 and then pressing it downward, the locking projection 75b is pressed in the axial direction by the component force, and The annular portion 63 is fitted into the annular elastic member 75 due to the reduction in diameter of the annular elastic member 75. The annular portion 63 once fitted is in a retaining state because the locking projection 75b is fitted in the annular cutout groove 67.

According to the connecting structure of the third embodiment, since the annular elastic member 75 has both the function of the bush and the function of preventing the tip-side swinging member 62 from coming off, the number of parts is reduced accordingly, and the door closer. It is effective in reducing the cost.

The present invention is not limited to the above-mentioned embodiment, but also includes the following contents.

(1) In the first embodiment, the retaining shaft member 73 is fixed to the link shaft 71 by screwing the screw shaft 73a into the screw hole 71d. Instead of this, the retaining shaft member 73 is press-fitted into a hole provided in the link shaft 71, or the retaining shaft member 73
May be fitted into the hole of the link shaft 71 via an adhesive.

(2) In the above-described first embodiment, the bush 72 is fitted on the second shaft 71b. However, without using the bush 72 in particular, the second shaft 71b is made thick and the tip thereof is The side swing member 62 may be directly fitted.

(3) In the second embodiment, the connecting member 70a is composed of the link shaft 71 and the annular locking member 74, but instead of this, the connecting member is integrally formed only by the link shaft. You may comprise. By doing so, the number of parts is reduced, and the manufacturing cost is reduced accordingly.

(4) In the second embodiment described above, a material having lubricity made of fluororesin or silicone resin is used as the annular locking member 74, but a metal material may be used instead of such a material. Good.

[0065]

According to the first aspect of the present invention, in the door closer, one arm member is provided with a swing member, and one arm member is connected to the other arm member via the swing member and the support shaft. Therefore, even if the distance between the arm members is not an appropriate distance due to an error in the mounting position of each arm member due to the site construction of the door closer, the above error can be absorbed by rocking the rocking member. This makes it possible to eliminate twisting of the arm members that occurs when the arm members are connected to each other when the swing member does not exist.

Moreover, the retaining shaft attached to the support shaft is constructed so that the rocking member can be attached / detached to / from the support shaft by one-touch operation by elastically deforming and expanding and expanding the head portion in the radial direction. Therefore, it is possible to improve the workability of the installation work of the door closer in the field.

Further, since the support shaft may be a straight support shaft, in comparison with the case of manufacturing a conventional support shaft having a spherical surface processed to enable one-touch operation,
The door closer can be easily manufactured, which can contribute to a reduction in manufacturing cost.

According to the second aspect of the present invention, the supporting shaft itself has a locking function for locking the swing member.
In addition to the effect of the invention of claim 1, the effect of reducing the number of parts is added, which can contribute to further reduction in the manufacturing cost of the door closer.

According to the third aspect of the present invention, the annular elastic member externally fitted to the support shaft has a locking function of locking the swing member. Therefore, in addition to the effect of the first aspect of the invention. As a result, the effect of reducing the number of parts can be added, which can contribute to further reduction in manufacturing cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a door closer in which a connecting structure of a first embodiment according to the present invention is adopted.

FIG. 2 is an assembled perspective view of the door closer shown in FIG.

3A and 3B are views of a connecting member for explaining the connecting structure of the first embodiment, where FIG. 3A is a sectional view in side view and FIG. 3B is a plan view.

FIG. 4 is an explanatory view for explaining the operation of the first embodiment, (a) is a state immediately before the tip side swing member is mounted on the connecting member, (b) is a tip side swing. The state in which the member is being attached to the connecting member and (c) show the state in which the tip-side swinging member is attached to the connecting member, respectively.

5A and 5B are views of a connecting member for explaining the connecting structure of the second embodiment, in which FIG. 5A is a sectional view in side view and FIG. 5B is a plan view.

6A and 6B are views of a connecting member for explaining the connecting structure of the third embodiment, in which FIG. 6A is a sectional view in side view and FIG. 6B is a partially cutaway plan view.

FIG. 7 is a front view of a door closer for explaining a conventional arm member connecting structure.

[Explanation of symbols]

10 Door closer 20 Closer body 21 biasing shaft 22 screw hole 30 bracket 31 fixing hole 40 Door side arm (first arm member) 41 Square hole 42 Fixed hole 50 Frame side arm (second arm member) 51 Cylindrical arm 52 Rod arm 55 Nut 56 Base End Shaft 57 tip side shaft seat 58 through hole 60 the swinging member 60 the swinging member 61 Base end side swing member 62 Tip end side swing member 63 annular part 64 clamping piece 65 through hole 66 rivet 67 annular notch 70 connecting member 70a Base end side connecting member 70b Tip end side connecting member 71 link shaft (support shaft) 71a first shaft 71b Second shaft 71c Flange 71d Screw hole 71e Caulking part 72 Bush 73 Shaft member 73a screw shaft 73b head 73c Annular bulge 73d Meat stealing hole 73e Cut groove 74 Annular locking member 74a Bush body 74b Locking ring 74c Locking protrusion 74d Notch groove 75 annular elastic member 75a annular recess 75b Locking protrusion D Door F frame

Claims (3)

[Claims] 1. An arm member connecting structure for a door closer, in which a first arm member on the door side and a second arm member on the frame side of the door are rotatably connected to each other at their ends, an end of one arm member. A support shaft fixed in the direction of the rotation center, a swing member provided at the end of the other arm member so as to be swingable, and fitted externally so as to be rotatable around the support shaft; A retaining shaft attached to the support shaft having a head for preventing the member from coming off the support shaft, the retaining shaft being elastically deformed to expand and contract the head in the radial direction. An arm member connecting structure for a door closer, wherein the swing member is configured to be attachable / detachable to / from the support shaft by one-touch operation. 2. An arm member connecting structure for a door closer, in which a first arm member on the door side and a second arm member on the frame side of the door are rotatably connected to each other at their ends, an end of one arm member. A support shaft fixed to the portion extending in the direction of the center of rotation, and a swinging member that is swingably provided at the end of the other arm member and that is externally fitted rotatably around the support shaft, The support shaft has a locking projection that locks the swinging member from coming out of the support shaft, and elastically deforms the locking protrusion in the radial direction so that the swinging member can be attached and detached by one-touch operation. An arm member connecting structure for a door closer, which is configured to obtain. 3. An arm member connecting structure for a door closer, in which a door-side first arm member and a door-frame-side second arm member are rotatably connected to each other at their ends, an end of one arm member. Supporting shaft extending in the direction of the center of rotation, fixed to this supporting shaft, an annular elastic member externally fitted and fixed to this supporting shaft, and swingably provided at the end of the other arm member, and around the annular elastic member. A rocking member that is rotatably fitted is provided, and the annular elastic member has a locking portion that locks the rocking member from coming out of the annular elastic member, and is engaged by elastic deformation of the annular elastic member. An arm member connecting structure for a door closer, wherein the swing member is configured to be attached and detached by one-touch operation by expanding and contracting the stop portion in the radial direction.