JP4017327B2 - Stop angle adjustment mechanism of door closer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stop angle adjusting mechanism (hereinafter simply referred to as a stop angle adjusting mechanism) of a door closer, and in particular, while facilitating attachment / detachment between an outer serration formed on a bracket pin and an inner serration formed on a cam plate. The present invention relates to a stop angle adjusting mechanism that can firmly connect a pin and a cam plate.
[0002]
[Prior art]
A device for stopping a door closer, that is, a device for temporarily stopping a door closer during a closing movement is convenient because it is not necessary to hold the door by hand when, for example, carrying a load into the room.
[0003]
Various door closer stopping devices have been proposed, but some have been incorporated in a door closer link mechanism as a simple structure and reliable operation.
[0004]
As shown in FIG. 1, this stop device is mounted on a bracket shaft 2 that is normally fixed to a door frame (not shown) via a bracket 1 and is formed with a cam plate 4 having a recess 3 that engages a click ball to be described later. And a click body such as a click ball (not shown) that is housed in a cylindrical base A of the fork arm 5 that is rotatably supported by the bracket shaft 2 and is urged in the direction of the bracket shaft 2. is doing.
[0005]
Then, the door closer operates in the closing direction, and the fork arm 5 relatively rotates around the bracket shaft 2 with respect to the cam plate 4 fixed to the bracket shaft 2 so that the click ball built in the base portion A When aligned with the recess 3 of the cam plate, the click ball fits into the recess 3 and stops against the closing force of the door closer.
[0006]
As shown in FIG. 2, this type of stop device can incorporate its stop angle position adjusting mechanism.
[0007]
That is, in FIG. 2, reference numeral 6 is an outer serration formed in the direction of the generatrix at the base portion of the bracket shaft 2 fixed to the bracket 1, and the outer serration 6 is formed at the opening edge of the mounting hole 7 of the cam plate 4. Can mesh with the formed inner serration 8.
[0008]
The cam plate 4 formed as described above is inserted horizontally in the slit 9 formed at the base end of the fork arm 5 and the mounting hole 7 is aligned coaxially with the rotation axis of the fork arm. The bracket shaft 2 is inserted into the support hole 11 at the base end of the fork arm 5, and the inner and outer serrations 8 and 6 are engaged with each other at an appropriate relative angular position.
[0009]
The stop angle adjusting mechanism configured as described above is integrally coupled with the collars 12, 12, the support plate 13 and the cover 14 with a set screw 15.
[0010]
Therefore, if the set screw 15 is loosened, the constituent members can be moved relative to each other in the vertical direction in FIG. 2, so that the meshing engagement between the inner serration 8 of the cam plate 4 and the outer serration 6 of the bracket shaft can be obtained. Therefore, the stop angle can be adjusted by re-fastening the set screw 15 after adjusting the relative angular positions.
[0011]
In addition, the applicant of the present invention previously described a stop angle adjusting mechanism capable of semi-automatically engaging and disengaging the bracket shaft 2 and the cam plate 4 using a jig with Japanese Patent Application No. 10-198061-2. Has proposed.
[0012]
[Problems to be solved by the invention]
Of course, the various stop angle adjusting mechanisms described above are practically used to perform their intended functions, but the conventional ones have a good fit between the outer and inner serrations 6 and 8, so that the stop angle can be adjusted. At the same time, there remains a grudge that these engagements and disengages are not performed smoothly.
[0013]
In other words, the cam plate 4 is difficult to fit into the bracket shaft 2 and is difficult to remove. The thing according to the above-mentioned proposal by the present applicant is still further because the engagement is performed through a jig.
[0014]
If these fittings are loosened so as to facilitate the engagement and disengagement of the outer and inner serrations, there is a disadvantage in that backlash occurs and noise and noise are generated when the door closer is operated.
[0015]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to propose a stop angle adjusting mechanism in which the bracket shaft and the cam plate can be easily engaged and disengaged, and in which backlash does not occur.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has one end connected to a bracket, a bracket shaft in which an outer serration is formed on a part of the outer peripheral surface, and a support hole that fits with the bracket shaft at the base end. A fork arm formed with a slit perpendicular to the support hole, a click body built in a base end portion of the fork arm and biased in the direction of the center axis of the support hole, and a recess engaged with the click body on the outer periphery And a cam plate having an inner serration that engages and engages with the outer serration at an opening edge of the mounting hole. The tapered end of the insertion hole into the mounting hole was formed, and the opening edge of the mounting hole on the back surface far from the bracket of the cam plate was caulked in a ring shape. And features.
[0017]
【Example】
An embodiment of the present invention will be described below with reference to FIGS.
FIG. 3 shows a main part of a stop angle adjusting mechanism according to an embodiment of the present invention, and reference numeral 2 in the drawing denotes a bracket shaft.
[0018]
The upper end of the bracket shaft 2 is a short column body whose upper end is coupled to the bracket 1 (see FIGS. 1 and 2) by welding or caulking.
[0019]
An outer serration 6 is formed at, for example, approximately the center of the outer peripheral surface of the bracket shaft 2.
[0020]
The conventional type which repeats disassembly, angle adjustment, and assembly using the conventional tool such as a driver shown in FIGS. 1 and 2, and Japanese Patent Application No. 10-198061-2 related to the proposal of the applicant of the present application. Although the shape of the bracket shaft 2 is different from that described in the specification and drawings of the No. according to the purpose, the difference in the shape is not the gist of the present invention, and therefore a more detailed description is omitted.
[0021]
The cam plate 4 in which the inner serration 8 is formed at the opening edge of the mounting hole 7 is inserted and fitted in the arrow A direction on the bracket shaft 2 that is normally fixed.
[0022]
When the cam plate 4 is mounted, when viewed from the bracket shaft 2 side, the lower end of the outer serration 6 in FIG. 3 becomes the insertion end.
[0023]
Then, a tapered portion 16 is formed at the insertion end of the outer serration 6 as shown in FIG.
[0024]
The one-side taper angle of the taper portion 16, that is, the angle α shown in FIG. 4 is preferably about 3 degrees (this angle is exaggerated in FIG. 4), for example.
[0025]
Further, the length of the taper portion 16 in the bus direction is about 2/3 of the length of the outer serration 6 in the bus direction in the illustrated embodiment. In the actual product, the length of the tapered portion 16 is about 2 mm (粍).
[0026]
Under the design conditions described above, when the outer diameter of the outer serration 6 is 20 mm, the outer diameter of the insertion end of the tapered portion 16 is about 19.8 mm.
[0027]
When the outer serration 6 is provided with the taper portion 16 as described above, the fitting with the cam plate 4 is smooth and can be attached to the sleeve, while the backlash between the taper portion 16 and the mounting hole 7 of the cam plate is provided after the attachment. May cause unpleasant noise.
[0028]
In order to prevent this, as shown in FIG. 5, the opening edge of the mounting hole 7 on the back surface (the lower surface in FIGS. 3 and 5) of the cam plate 4 far from the bracket 1 (see FIG. 2) is ring-shaped. The annular projecting portion 17 is formed in the vicinity of the back surface of the cam plate at the opening edge.
[0029]
The overhanging portion 17 is engaged with the tapered portion in such a manner that each of the many protruding ridges constituting the inner serration 8 enters a valley between the protruding portions at the lower end of the tapered portion 16 of the outer serration 6. Needless to say.
[0030]
The caulking for forming the overhanging portion 17 is, for example, a pipe-shaped punch having an inner diameter slightly larger than the circumscribed circle of the inner serration 8 and a wall thickness of about 2 mm, coaxial with the mounting hole 7 from the back surface side of the cam plate 4. To hit.
[0031]
At this time, the depth of the ring-shaped indentation 18 is preferably 0.2 to 0.3 mm, for example.
[0032]
It should be noted that the projecting amount of the overhanging portion 17 in the center axis direction of the mounting hole 7 is excessive, and the same size as the product when caulking is applied so that the overhanging portion 17 during mounting does not come into contact with the tapered portion 16 of the outer serration. A cam plate (not shown) is attached to a jig having the outer serration 6 in which the tapered portion 16 is formed, and thereafter, it is possible to caulk with a punch.
[0033]
If it does in this way, the inner side protrusion amount of the overhang | projection part 17 will be suppressed by a jig | tool, and it will not become excessive.
[0034]
The present invention having the above-described configuration is not limited to the conventional stop angle adjusting mechanism shown in FIGS. 1 and 2, but the description and drawings of Japanese Patent Application No. 10-198061-2 related to the previous proposal of the applicant. Needless to say, the present invention can be applied to those described in the above.
[0035]
【The invention's effect】
As is apparent from the above description, the present invention forms a tapered portion at the insertion end of the bracket shaft outside serration into the mounting hole and opens the mounting hole on the back surface of the cam plate far from the bracket. Since the end edge portion is crimped in a ring shape, the cam plate can be engaged and disengaged very smoothly with respect to the bracket shaft, and there is no play or noise in the coupled state of the two.
[0036]
In addition, the invention has various effects such as a very simple configuration.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a link mechanism of a conventional door closer provided with a stop device.
FIG. 2 is an external perspective view in which constituent members of the stop angle adjustment mechanism are developed.
FIG. 3 is a schematic partial cross-sectional front view of a bracket shaft and a cam plate showing the main part of the present invention.
4 is an enlarged view of a portion B in FIG. 3;
5 is an enlarged view of a portion C in FIG.
[Explanation of symbols]
1 Bracket 2 Bracket shaft 3 Recess 4 Cam plate 5 Fork arm 6 Outer serration 7 Mounting hole 8 Inner serration 9 Slit 10 Upper collar 11 Bearing hole 16 Taper portion 17 Overhang portion 18 Indentation

Claims (1)

A fork arm that has one end connected to the bracket, a bracket shaft that forms an outer serration on a part of the outer peripheral surface, and a support hole that fits into the bracket shaft at the base end, and a slit that is perpendicular to the support hole And a click body built in the base end portion of the fork arm and urged in the direction of the center axis of the support hole, and a recess that engages with the click body on the outer periphery and is fitted to the bracket shaft And a cam plate having an inner serration that engages and engages with the outer serration at the opening edge of the mounting hole, and a tapered portion that is tapered at the insertion end of the outer serration into the mounting hole. And adjusting the stop angle of the door closer characterized in that the opening edge of the mounting hole on the back surface far from the bracket of the cam plate is caulked in a ring shape Structure.

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