JPH0138229Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a door opening stop device for a door closer that can arbitrarily adjust the opening stop position of the door, and its purpose is to adjust the angle of the door opening stop position. The reason is that the holding force for stopping can be adjusted to be large or small.

The drawings showing the embodiments of the present invention will be described in detail below.As shown in FIG. connected by.

The link mechanism 4 consists of an arm 4a fixed to the pinion shaft 2a, a bracket 4b fixed to the door mounting frame 3, and a link 4c connecting these with protruding shafts 5 and 6. A cam plate 8 having a notched recess 8c as shown in FIG. 3 in the peripheral protrusion 8b on one side of the cam surface 8a is attached to and detached from the pivot portion 7 between the bracket 4b and the bracket 4b, and is fastened so as to be rotationally adjustable. At the same time, a spring 9 is attached to the link 4c.
The trochanter 11 at the tip of the sliding body 10, which is elastically biased and installed inside, is constantly pressed against the cam surface 8a, and when the door is opened, the trochanter 11 engages with the notch recess 8c, thereby stopping the door from opening. is configured so that it is carried out.

Thus, in the present invention, a seat 12 having a through hole 12a in the center is fitted onto the protruding shaft 6 provided non-rotatably at the end of the link 4c, and a contact surface between the seat 12b and the bracket 4b is provided. Serration 13,14
are provided in a radial manner and engage with each other so as to be detachable and rotatably adjustable, and a convex portion 1 other than a perfect circle, such as an oval, square, or hexagon, is formed from the back surface of the seat portion 12b.
2c from the center of the through hole 12a in FIG.
As shown in B and C, respectively, the cam plate 8 is eccentrically provided by α in one side and protrudes, and a through hole 8d is formed through the cam plate 8 in correspondence with the outer shape of the convex portion 12c. 12c and the cam plate 8 are removably attached to the cam plate 8, and the convex portion is fitted to the cam plate 8 so that the direction can be changed 180 degrees as shown in FIGS. 4A and B and 5A and B, respectively. They are fixed and fastened to the seat 12 in the axial direction.

Here, as the protruding shaft 6, a bolt with a step 6a as shown in FIG. Washer 15 on the receiver and threaded part 6b
The bracket 4b, the link 4c, the cam plate 8, and the seat 12 are fastened by screwing a nut 16 therebetween.

Further, the link 4c is connected to the rod-shaped member 4c' and the cylindrical housing 4.
c'' coaxially and screwed together so as to be adjustable in expansion and contraction in the axial direction.

In the above configuration, since the door closer 2 is fixed to the door 1 and the bracket 4b is fixed to the door mounting frame 3, by rotating the door 1 from the currently closed position in the opening direction, The link 4c rotates around the protruding shaft 6, and in the middle of the rotation, the link 4c
As the trochanter 11 supported on the cam plate 8 approaches the peripheral protrusion 8b of the cam surface 8a,
moves backward while compressing the spring 9, and the trochanter 11 fits into the notched recess 8c, thereby stopping the door from opening.

Therefore, the seat 12 and the cam plate 8 are connected by the nut 16.
After releasing the fastening of the serrations 12 and 13, the cam plate 8 is rotated in the circumferential direction together with the seat 12 to displace the notch recess 8c by an arbitrary amount, and then the serrations 12 and 13 are tightened. , the door opening stop position described above can be adjusted to a desired position.

In the above configuration, the distance from the center of the through hole 8d of the cam plate 8 to the notch recess 8c is l, and the one-sided seat 12 is eccentric from the center of the protruding shaft 6, that is, the center of the through hole 12c to the center of the convex portion 12c. Let the amount be α, and furthermore, the distance from the center of the protruding shaft 6 to the trochanter 11, that is, the trochanter 1
1, the rotation radius L of the trochanter 11 is constant, whereas the through hole 8d of the cam plate 8
When the seat 12 is rotated 180 degrees around the axis and the convex part 12c is fitted, the distance from the center of the protruding shaft 6 to the notch concave part 8c becomes l-α from FIG. 4A and B, and In FIGS. 5A and 5B, the distance becomes l+α, and the distance changes. Therefore, the pressure and locking force of the trochanter 11 against the cam surface 8a and the notch recess 8c of the cam plate 8 change, so the cam plate 8 is adjusted so that the above distance becomes l+α.
By relatively fitting the door and the seat 12, the force for holding the door open and stopping increases.

As explained above, according to the door opening/stopping device for a door closer according to the present invention, in the pivoting portion 7 between the bracket 4b and the link 4c, the bracket 4b and the seat 12 supporting the cam plate 8 are connected to each other. By changing the engagement position of the provided serrations 13 and 14 at an arbitrary angle and tightening them, the cutout recess 8 of the cam plate 8 can be closed.
By being able to displace c, the door opening position can of course be adjusted freely. In particular, according to the present invention, a protrusion 12c is formed on the seat 12 in correspondence with the through hole 8d formed in the polygonal shape of the cam plate 8. By protruding eccentrically to the side and fitting the convex portion 12c in the through hole 8d while changing the direction, the cam plate 8 can be moved from the center of the shaft.
Since the distance to the notch recess 8c can be changed in two steps, the locking force with the trochanter 11 can be adjusted, and together with the adjustment of the door opening stop position, the stop holding force can be easily adjusted to a desired value. It has an adjustable effect.

In addition, since the structure is extremely simple, as it is sufficient to eccentrically protrude the convex portion 12c from the seat 12, there is no need to screw an adjustment screw into the link, which also serves as a spring receiver, as in the past. Since the troublesome processing and the like can be omitted, it can be manufactured at a low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway longitudinal side view showing a door opening stop device for a door closer according to the present invention, and Fig. 2 A, B, and C show seats in the device.
A is its plan view, B is its vertical side view, C is its bottom view, Fig. 3 is a plan view showing the cam plate in the same device, Figs. 4, A, B, and 5 are the same. FIG. 3 is an explanatory diagram showing the relationship between a cam plate, a seat, and a trochanter in the device using a plan view and a longitudinal side view, respectively. 2...Door closer, 4...Link mechanism, 4
b...Bracket, 4c...Link, 6...Protruding shaft, 7...Pivot part, 8...Cam plate, 8a...Cam surface, 8b...Peripheral protrusion, 8d...Through hole, 10... …
Sliding body, 11... Trochanter, 12... Locus, 12a...
Through hole, 13, 14... Serration, α... Eccentricity amount.

Claims (1)

[Scope of utility model registration request] A pinion shaft 2a of the door closer 2 fixed to the door 1 and a bracket 4b fixed to the door mounting frame 3
A cam plate 8 having a notched recess 8c in one side peripheral protrusion 8b of a cam surface 8a is removably fastened to the pivot portion 7 of the link mechanism 4 that connects the link mechanism 4, and the cam plate 8 is removably fastened to the pivot portion 7 of the link mechanism 4. Trochanter 11 of supported sliding body 10
In a door opening/stopping device for a door/closer which is always pressed against the cam surface, a seat 12 is inserted into the protruding shaft 6 at one end of the link, and the seat is connected to the bracket 4b on the fixed side of the door/closer. Radial serrations 13 and 14 are formed on both contact surfaces to engage and tighten them in a detachable manner, and a seat provided in a polygonal shape or the like corresponds to the through hole 8d bored in the polygonal shape or the like of the cam plate. A convex portion 12c is provided to protrude to one side with respect to the through hole 12a of the seat that meshes with the protruding shaft by a desired amount of eccentricity α, so that the distance of the cam plate notch recess with respect to the trochanter can be adjusted in displacement. A door opening stop device for a door closer.