JPH0130526Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a door closer stopping device.

The conventional outer cam type door closer stop device is
Due to the structure, the stop cam is not fully fixed to the main arm, which causes an unpleasant sound when the door stops, and the connection between the stop joint and the bushing, which has steel balls and coil springs installed inside. had problems in terms of durability and strength.

In addition, conventionally, as in Utility Model Publication No. 43-21559,
A system that incorporates a stop device at the joint point of two links is known, but this method has problems with strength because the camshaft is supported on a cantilever, and the cam and the corresponding member Since a roller is used for the cam, the structure is complicated and it is difficult to miniaturize the cam, and the position of the cam cannot be finely adjusted due to the screw hole selection method. In addition, in order to make it possible to finely adjust the position of the cam, a method using serrations is disclosed in Japanese Utility Model Application No. 52-155336 and Japanese Utility Model Application No. 53-
Although this is known from Japanese Patent No. 9740, even if this is adopted between the cam and the link, the strength problem due to the cantilever support structure of the camshaft cannot be solved.

In addition, the one that supports the camshaft on both sides was developed in 1982.
This method, which is known from Japanese Patent No. 70565, uses spline fitting to fix the cam to the pivot, so when changing the position of the cam, the cam must be removed from the pivot and the cam placed at a predetermined position. After changing it, it has to be inserted into the pivot and refastened, and there is a drawback that it cannot be changed just by loosening the tightening bolt a little.

The present invention was proposed in view of the above-mentioned shortcomings of the prior art, and has a bifurcated portion divided into an upper and lower portion at one end.
Moreover, it is provided with a vertical through hole that straddles this forked part, and is equipped with a steel ball that is pressed from the other end side toward this forked part by a coil spring whose line of action is aligned with the center line of the forked part. It is rotatably inserted between the stop joint and the bifurcated part of the stop joint, and has a locking recess on a part of the outer periphery that corresponds to the steel ball, and the center hole is fitted with a rotation prevention hole such as a spline. a stop cam, which is integrally fitted into the center hole of the stop cam, is rotatably inserted between the two forks of the stop joint, and has a radial circular serration at one end. A cam button, a main arm or a bracket formed with radial circular serrations that mesh with the serrations of the cam button, and a cam button inserted between the main arm or bracket and the bifurcated portion of the stop joint are connected by passing through the main arm or bracket. The door closer is configured with a pivot pin and a tightening bolt.

By configuring in this way, the present invention
The camshaft is supported on both sides so that all the members of the stop mechanism can be compactly incorporated into the bifurcated part of the stop joint, and in particular, the stop camshaft is configured to be divided into a pivot pin and a cam bush. Accordingly, the cam and cam bushing can be freely rotated around the pivot pin by simply loosening the tightening bolt a little, and the stopping position of the cam can be easily adjusted.

The present invention will be described below with reference to embodiments shown in the drawings.

1 to 13, a door 1 is provided on a wall 3 of a room via a hinge 2 so as to be openable and closable. The door closer body 4 is attached to the surface of the door 1 to provide a self-closing force to the door 1, and the base end of a main arm 6 is fixed to the rotating shaft 5. Bracket 8 fixed to door frame 7 of door 1
The proximal end of the link 9 is pivotally attached to the distal end of the link 9, and a connecting screw hole 12 formed in the stop joint 11 is screwed into the threaded portion 10 formed at the tip of the link 9, so that the stop joint can be connected to the stop joint. Int 11 is connected. This stop joint 11 has a bifurcated portion 13 with a gap 13a formed at its tip.
The bifurcated distal end portion 13 and the distal end 6a of the main arm 6 are pivotally connected, and a pivot pin 15 having a screw hole 14 fixed to the distal end 6a of the main arm 6 is passed through this pivotally coupled portion, and a stop cam is attached to the pivot pin 15. 16, a cam bush 17, and a bush 18 are arranged.
A radial plane serration 1 is provided on the upper surface around the pivot pin 15 at the tip 6a of the main arm 6.
9 and the plane serration 19.
The cam bush 17, which has serrations 20 on its end faces as shown in FIG. The stop cam 16 is inserted and fitted onto the pivot pin 15 and fitted onto the cam bush 17. The above stop cam 16 and cam bush 17
The fitting part has a spline shape 2 as shown in Figure 2.
2 for complete integration. The tightening bolt 23 is screwed into the screw hole 14 of the pivot pin 15 from above the bifurcated portion 13 of the stop joint 11 and tightened via the bush 18, and this tightening force is used to tighten the tip 6a of the main arm 6. Serration 20 of plane serration 19 and cam bush 17
The main arm 6 and the cam bush 17 are fixed together by engaging them. At this time, the stop joint 11, cam bush 17, and bush 18 are loosely fitted, and the link 9 and stop joint 11 rotate around the pivot pin 15 according to the opening degree of the door 1, and then stop. Since the cam 16 and cam bush 17 are fixed by spline fitting,
The main arm 6 and the stop cam 16 rotate integrally. Then, the main arm 6 and the stop cam 1
6, that is, the crossing angle α can be arbitrarily selected by adjusting the engagement position of the serrations 19 and 20. A stop joint 1 is located on the extension line of the connecting screw hole 12.
A coil spring 25 is installed inside the insertion hole 24 formed in the insertion hole 24, and a steel ball 26 is provided at the tip of the coil spring 25, and the steel ball 26 is pushed through the insertion hole 24 into the bifurcated portion 1 by the biasing force of the coil spring 25.
The steel ball 26 is made to protrude into the gap 13a of the door 1 and press against the outer peripheral surface of the stop cam 16.
is configured to roll on the outer circumferential surface of the stop cam 16 and fit into and lock in the recess 21 of the stop cam 16. The biasing force applied to the steel ball 26 by the coil spring 25 is adjusted by a spring adjustment screw 27 screwed into the connecting screw hole 12 of the stop joint 11 at the other end of the coil spring 25.

Next, the operation of the device of the present invention will be explained as follows.

The door 1 is closed in the state shown in Fig. 1, but as it is opened in the direction of the arrow A, the intersection angle β between the main arm 6 and the link 9 gradually increases, and eventually the door 1 is closed as shown in Fig. 8. The intersection angle is β'. This crossing angle β' is equal to the crossing angle α between the main arm 6 and the stop cam 16 described above, and becomes the opening stop position of the door 1. This operation sequence will be explained in detail with reference to FIGS. 11, 12, and 13. The state of FIG. 11 changes to the state of FIG. 12, and the stop cam 16 approaches the steel ball 26 of the stop joint 11, and the stop cam 16 approaches the steel ball 26 of the stop joint 11.
The slopes 16a formed on both sides of the outer circumferential recess 21 abut against the steel ball 26, and the steel ball 26 is pushed against the coil spring 2.
5, and rotates in the direction of arrow B while compressing the coil spring 25. Thereafter, when the recess 21 of the stop cam 16 reaches the position facing the steel ball 26 in the state shown in FIG.
It is urged in the direction to fit into and lock into the recess 21.
At this time, the spring force of the coil spring 25 is set so that the lock between the stop cam 16 and the steel ball 26 will not be released due to the self-closing force of the door closer body 4, and the main arm 6 and the link 9 The intersection angle of is constrained to β', and the door 1 is in an open and stopped state. Next, when releasing the door 1, apply a force equal to or greater than the stopping force to the door 1 in the direction of the arrow c in Fig. 8.
By reversing the order of operation described in Figure 3, the steel ball 26
The lock between the door closer and the stop cam 16 is released, and the door 1 is then closed by the self-closing force of the door closer body 4.

If you wish to adjust the angle of the stop position of the door 1 in the open state, loosen the tightening bolt 23 and adjust the engagement position of the flat serration 19 of the tip 6a of the main arm 6 and the serration 20 of the cam button 17 as described above. Adjustments may be made as appropriate.

Although the above-mentioned door closer has been explained using the standard mounting method among the mounting methods, the parallel mounting method shown in FIGS. It is.

As explained above, the present invention has a vertically divided bifurcated portion at one end, a vertical through hole that straddles the bifurcated portion, and directs its line of action toward the bifurcated portion. A stop joint is rotatably inserted between a steel ball that is pressed from the other end by a coil spring aligned with the center line of the stop joint, and a forked part of the stop joint. A stop cam having a locking recess corresponding to the steel ball and having a center hole as a detent hole such as a spline, and a stop cam that is integrally fitted into the center hole of the stop cam and that is connected to the stop joint. A cam bushing that is rotatably inserted between the two forks and has a radial circular serration formed at one end; a main arm or bracket that has a radial circular serration that meshes with the serration of the cam bush; and the main arm or bracket. Since the door closer's stopping device is constituted by a pivot pin and a tightening bolt that pass through and connect the cam bush inserted between the two forks of the stop joint, the following effects can be obtained. .

(1) The shaft of the stop cam can be supported by one link on both sides of the stop cam, that is, the bifurcated part of the stop joint, and the force acting on the stop cam by the coil spring of the stop mechanism can be It can be supported reliably by holding it, and its durability and strength can be improved.

(2) The stop mechanism consisting of the stop cam, steel balls, and coil spring can all be compactly incorporated into the bifurcated part of the stop joint, resulting in a simple and bulky configuration.

(3) The above-mentioned double-sided support improves durability and strength, and while realizing compact integration of all parts into the bifurcated part, it is possible to simultaneously achieve stepless position change of the stop cam and ease of position change operation. .

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a specific embodiment of the present invention with the door closed, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, and Fig. 3 is an A-A in Fig. 2. 4 is a plan view of the tip of the main arm according to the present invention, FIG. 5 is a bottom view of the cam bush, FIG. 6 is a side view of the tip of the stop joint, and FIG. 7 is a plan view of the tip of the main arm according to the present invention. A detailed view of a section taken along the line B-B, FIG. 8 is a plan view showing a state in which the door is stopped and held open, FIG. 9 is an enlarged sectional view of the main part of FIG. 8, and FIG. 10 is C of FIG. 9.
11, 12 and 13 are enlarged sectional views of main parts to explain the stopped and held state of the door, and FIGS. 14 and 15 show other embodiments of the present invention. Fig. 14 is a plan view showing the door in a closed state, Fig. 15 is a plan view showing the door in a stopped state, and Figs. 16 and 17 show further embodiments of the present invention. FIG. 16 is a plan view showing the door in a closed state, and FIG. 17 is a plan view showing the door in a stopped state. 1...Door, 4...Door closer body, 6...
Main arm, 8... Bracket, 9... Link, 11... Stop joint, 13... Bifurcated section, 16... Stop cam, 17... Cam button,
18...button, 19, 20...serration, 21...recess, 22...spline shape, 2
3...Tightening bolt, 25...Coil spring, 26...
…wrecking ball.

Claims (1)

[Scope of utility model registration request] A coil spring that has a vertically divided bifurcated portion at one end, a vertical through hole that straddles the bifurcated portion, and whose line of action is aligned with the center line of the bifurcated portion toward the bifurcated portion. A stop joint having a steel ball inside which is pressed from the other end side, and a locking recess that is rotatably inserted between the two forks of the stop joint, and a locking recess corresponding to the steel ball on a part of the outer periphery. and a stop cam whose center hole is a rotation prevention hole such as a spline, and which is integrally fitted into the center hole of the stop cam and is rotatable across the forked portion of the stop joint. a cam bushing that is inserted through the main arm or bracket and has a radial circular serration at one end; a main arm or bracket that has a radial circular serration that meshes with the serration of the cam button; and a bifurcated portion of the main arm or bracket and the stop joint. A stop device for a door closer, comprising a pivot pin and a tightening bolt that pass through and connect to a cam bush inserted between them.