JPS5829253Y2 - Detachable door closer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a removable door closer in which an automatic door-closing mechanism can be attached to and detached from a pivot hinge, and particularly relates to an improvement in a speed-governing mechanism that controls the door-closing speed using hydraulic pressure.

FIG. 1 is a vertical sectional view of an embodiment of a door closer according to the present invention, and FIG. 2 shows a pivot hinge portion of the door closer.

In Fig. 2, the pivot hinge part of the upper pivot part of the door is roughly divided into the seat plate 11 on the door frame side and the pivot shaft 1.
2 and the seat plate 21 on the door side.

A mounting piece 111 of the seat plate 11 is fixed to the door frame 10 with screws, and a pivot shaft 12 is fitted into a through hole 112 formed in the center so as to be non-rotatable and prevent it from falling off with a set screw 13.

That is, the cross-sectional shapes of the through hole 112 and the pivot shaft 12 are approximately semicircular.

14 is a door frame side decorative cover. The seat plate 21 is a mounting piece 21
1 is fixed to the door 20 with screws, and a pivot shaft 12 is inserted through a through hole 212 formed in the center via a bearing 22 to rotate together with the door 20 about the shaft 12.

23 is a decorative board, 24 is a door side decorative cover, and 60 is a holding plate that holds an automatic door closing mechanism.

Note that the lower part of the door is supported by a simple pivot hinge.

On the other hand, regarding the automatic door closing mechanism, referring to FIG.
The door closing mechanism is roughly divided into a door closing mechanism using a coil spring 31 fixed to a fixed seat 40 whose rotation is prevented by a door closing mechanism, and a hydraulic speed regulating mechanism constructed within a cylinder 50 fixed to a cylindrical case 30.

One end of the coil spring 31 is fitted into a vertical groove 331 of a spring seat 33 fixed to the bottom of the cylindrical case 30 by a stopper pin 32, and the other end is fitted into a vertical groove 401 of a fixed seat 40.
has been incorporated into.

This allows the rotation of the cylindrical case 30, that is, the door 20
When the spring 31 is twisted as the spring 31 rotates, a door closing force is obtained based on its restoring force.

The bottom of the cylinder 50 is welded and fixed to the bottom cover 34 which is fixed to the bottom of the cylindrical case 30 by a pin 32, and the cylinder head 51 is fitted to the top.

Further, a damper shaft 41 whose rotation is prevented by a fixed seat 40 is press-fitted into the center hole of the cylinder head 51, thereby enclosing the buffer oil 52 in the cylinder 50.

A threaded portion 501 is formed on the lower inner wall of the cylinder 50, into which a piston screw 53 is screwed.
A damper shaft 41 is fitted into the inner wall of the damper shaft 41 by splines or the like.

As a result, when the cylinder 50 rotates, the piston screw 53 moves upward or downward.

In addition to the spline, the upper inner wall of the piston screw 53 has a vertical groove (not shown) which communicates the upper space of the cylinder 50 and the inner space of the piston screw 53 and allows the buffer oil 52 to move freely.
(not shown) is formed.

On the other hand, the cylindrical case 30 is rotatably held together with the seat plate 21 by a holding plate 60, which will be described later.

The fixed seat 40 has a spline formed in its center through hole, into which the spline formed at the lower part of the upper snake pot shaft 12 is fitted, and into which the spline formed at the upper part of the lower damper shaft 41 is fitted. The fixed seat 40 and the damper shaft 41 are prevented from rotating.

35 is a washer which, together with a retaining ring 36, prevents internal elements from falling off even if the automatic door closing mechanism is turned upside down.

37 is a ball bearing.

Now, in this embodiment, the piston screw 53 and the cylinder 50
The relationship is set such that when the cylinder 50 rotates due to the opening of the door, the piston screw 53 moves upward, and when the door is closed, the piston screw 53 moves downward.

A check valve 532 is provided on the bottom partition wall 531 of the piston screw 53, and the buffer oil inside the piston screw 53 is
In addition, a through hole 533 is provided in the center of the partition wall 531, and a regulating frame 54 having a slope over this stroke length is slidably inserted through the through hole 533. This allows the buffer oil 52 to move slightly upward through the through hole 533 during the downward movement of the piston screw 53.

The hydraulic pressure at this time can reduce the door closing speed.
Furthermore, due to the slope of the speed regulating frame 54, the amount of oil movement decreases as the piston screw 53 moves downward, so that the speed can be gradually lowered.

38 is a preset for locking the automatic door closing mechanism in a state in which the cylindrical case 30 and the fixed seat 40 are relatively rotated by a predetermined angle in a direction that generates a door closing force before being attached to the pivot hinge part. It is a pin and engages with a stopper pin 39 fixed to an outer circumferential groove 401 of the fixed seat 40.

By removing the pin 38 after attaching it to the pivot hinge,
A predetermined closing force can be obtained even when the door is closed.

Note that the outer circumferential groove 401 of the fixed seat 40 is formed over approximately 180° in the circumferential direction on the door-opening side, so that no problem will occur even if the door is opened without the pin 38 being removed.

Next, the mounting structure of the pivot hinge portion and the automatic door closing mechanism will be described with reference to FIG. 3, which is a cross-sectional view taken along the line B-B in FIG. 1.

A plurality of tooth-like protrusions 213 are formed on the outer layer of the protruding portion of the door side seat plate 21 at intervals in the circumferential direction, and the cylindrical case 30
A vertical groove 3 into which each tooth-like projection 213 can fit is provided in the upper thick part of the
01 are formed at intervals in the circumferential direction and are integrally rotatable.

Further, a retaining plate 60 is rotatably provided around the bearing 22 on the seat plate 21, and the outer diameter of the retaining plate 60 is the same as the outer diameter of the protruding portion of the seat plate 21. A tooth-like protrusion 601 having a smaller width than the tooth-like protrusion 213 is formed at a position corresponding to the tooth-like protrusion 213 .

The upper part of the cylindrical case 30 is partially cut out at a portion corresponding to the extension portion of the attachment piece 211 of the seat plate 21, and is adapted to fit into the outer layer of the extension portion of the seat plate 21.

Further, on the inner wall of the upper thick part between the longitudinal grooves 301 of the cylindrical case 30, horizontal grooves 302 (see FIG. 1) into which the tooth-like protrusions 601 of the retaining plate 60 can be fitted are formed in the circumferential direction.
By fitting the tooth-like projections 601 of the holding plate 60 into the vertical grooves 302, the cylindrical case 30 can be held on the seat plate 21 without using screws, and the automatic door closing mechanism can be prevented from falling off.

A cap screw 17 is used to fit the toothed projection 601 into the transverse groove 302.

This presser screw 17 is attached to the bottom edge of the seat plate 21 and the mounting piece 21.
1. The decorative plate 23 attached to the seat plate 21 is screwed in so as to cover the outer peripheral surface of the drawer part, and the holding plate 60 is pushed in the direction of arrow A until the protruding part 602 abuts one end of the cutout part of the cylindrical case 30. Fix it in the rotated position.

Reference numeral 214 is a positioning pin, which is attached to the protrusion 60 of the holding plate 60.
The tooth-like protrusion 60 is formed between the two notches 603 formed on the outer periphery.
The position where 1 and 213 overlap is defined.

604 is a pin for position adjustment. Note that even when the door is opened and closed, the holding plate 60 does not change its position relative to the seat plate 21, and the cylindrical case 30 also rotates together with the seat plate 21.
The positional relationship between the tooth-like protrusion 601 and the horizontal groove 302 of the cylindrical case 30 does not shift.

To remove the automatic door closing mechanism, loosen the retaining screw 17, pull the pin 604 in the direction opposite to arrow A, and remove the toothed protrusion 21.
3 and 601 can be easily removed by overlapping them.

Next, the speed regulating mechanism in the automatic door closing mechanism, which is the main part of the present invention, will be explained.

The regulating rod 54 is connected to a regulating screw 55 that is screwed into a threaded portion 411 formed at the bottom of the center hole of the damper shaft 41, and the regulating screw 55 rotates inside the center hole of the damper shaft 41. It is made vertically movable by an adjustment shaft 56 that is provided only for movement.

This can be done by making the hole 551 of the regulating screw 55 square and the lower part of the adjusting shaft 56 also having a square cross section.

Furthermore, since the adjustment shaft 56 is rotatable by the adjustment rod 15 which is provided in the central through hole of the pivot shaft 12 so as to allow only rotational movement, the size of the gap between the speed governor rod 54 and the through hole 533 can be adjusted. It is possible to change the intensity.

That is, when the automatic door-closing mechanism is installed, the slot 561 provided on the head of the adjustment shaft 56 and the lower part of the adjustment rod 15 fit together, and the head of the adjustment rod 15 is provided with a notch 1 around the periphery.
An adjustment knob 16 provided with an adjustment knob 61 is provided, and the adjustment shaft 56 can be rotated by this rotation.

162 is an O-ring. For example, in winter,
Even if the viscosity of the buffer oil changes due to differences in ambient temperature in summer, the desired door closing speed can be obtained.

Furthermore, as shown in FIG. 4, a notch 161 is provided around the side surface of the adjustment knob 16 so that the notch 161 can be easily accessed from the side.
By making it possible to insert a screwdriver etc. into the door and rotate it, you can use it especially when the upper part of the pivot hinge part is covered by the door frame or ceiling and there is not much space, or when the pivot hinge part and the automatic door closing mechanism are connected. Even when the device is installed with the vertical positional relationship reversed, rotation adjustment can be easily made with respect to the knob 16 while it is still installed.

Of course, slots may also be provided on the upper surface of the knob 16.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of the removable door closer according to the present invention, and Fig. 2 is a longitudinal sectional view of the pivot hinge part of the door closer.
3 is a cross-sectional view taken along the line B-B in FIG. 1, and FIG. 4 is a view of the adjustment knob in FIG. 1 viewed from the arrow opening. In the figure, 10 is the door frame, 11 is the door frame side seat plate, 12 is the pivot shaft, 16 is the adjustment knob, 17 is the holding screw, 20 is the door, 2
1 is a door side seat plate, 22 is a bearing, 30 is a cylindrical case, 31 is a coil spring, 38 is a preset pin, 40 is a fixed seat, 41 is a damper shaft, 50 is a cylinder, 52 is a buffer oil, 53 is a piston thread , 54 is a speed regulating rod, 55 is a speed regulating screw, 56 is an adjusting shaft, 15 is an adjusting rod, and 60 is a holding plate.

Claims (1)

[Scope of utility model registration request] A pivot hinge that is connected to a door frame side seat plate having a pivot axis and a door side seat plate that is rotatably installed with respect to the pivot axis, and that is fitted to the door side seat plate and rotates together with the door. An automatic door-closing mechanism includes a cylindrical case, a spring that generates a door-closing force by rotation of the case, and a cylinder provided in the case that incorporates a hydraulic regulating mechanism that buffers the door-closing force. As an adjusting means for the speed governing mechanism, an adjusting rod is provided in a central through hole formed in the pivot shaft so as to be capable of only rotational movement, and the speed governing mechanism is provided with an adjusting rod that converts the rotational movement of the adjusting rod into reciprocating motion in the axial direction. A regulating rod for adjusting the closing speed of the door is provided through a threaded body, and an adjusting knob is provided on the head of the adjusting rod, protruding from the side seat plate of the door frame and having a notch on at least a side surface. Removable door closer.