JPH0710349U - Door body opening / closing device - Google Patents

Abstract

(57) [Summary] [Purpose] When opening a door, such as a rotating door
Do not open the door suddenly due to its own weight. [Structure] Oval bearing holes 3 are provided on both side surfaces of a concave portion of a main body 1, and oval rotary shafts 4 are provided on both sides of a door 2. The rotary shaft 4 is provided with a slit 5 in the minor axis direction. This allows
When the door is opened, the rotary shaft is pressed by the bearing hole so as to press the slit, the tip is bent, friction between the rotary shaft and the bearing hole is increased, and the door is prevented from opening suddenly due to its own weight.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an opening and closing device for a door or the like, and relates to an opening and closing device that does not suddenly open and close due to the weight of the door body.

[0002]

[Prior art]

 It is desirable to install a damper mechanism in equipment that has a door that opens and closes in a rotary manner so that the door does not suddenly open due to its own weight when the door is opened. However, if a hydraulic damper mechanism or a pneumatic damper mechanism is used, or if a spring or the like is used, the cost will increase, so if it is difficult to use a simple portable type, for example, in terms of cost. There is.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to provide a device that does not suddenly open due to its own weight when the door is opened without using a relatively expensive mechanism such as a hydraulic damper mechanism or a pneumatic damper mechanism. To do.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by providing a body with an oval bearing hole on the side surface of a recess, an oval cross section, and a major axis that matches the major axis of the bearing hole. It is composed of a door body that has a rotary shaft that is shorter than the short diameter and has slits formed in the short diameter direction on its side surface.When the door body is closed in the recess of the main body, the long diameter of the bearing hole and the rotary shaft The door body opening / closing device is configured by arranging so that the major axis is in the same direction.

[0005]

[Action]

 With the above-described configuration, in the door body opening / closing device according to the present invention, when the door is opened, the rotary shaft of the door is pressed by the portion having the short diameter of the bearing hole so that the slit shrinks. Friction with the bearing holes is increased, which limits the sudden opening movement of the door.

[0006]

【Example】

 Hereinafter, an embodiment of a door opening / closing device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an essential part showing an embodiment of a door opening / closing device according to the present invention. In the figure, 1 is a main body and 2 is a door. Reference numeral 3 denotes a bearing hole, which is formed in a long hole shape and is provided at two positions on the left and right of the concave portion of the main body 1 so as to face each other. Reference numeral 4 denotes a rotary shaft which is inserted into the bearing hole 3 and has an oval cross section. A slit 5 is provided in the central portion in the minor axis direction and is provided on both sides of the door 2. The major axis of the bearing hole 3 and the major axis of the rotary shaft 4 are arranged in the same direction when the door 2 is closed in the main body 1.

FIG. 2 (a) is a perspective view showing the rotary shaft 4 and the slit 5, and FIGS. 2 (b), (c) and (d) show the relationship between the rotary shaft 4 and the bearing hole 3 when the door 2 is opened and closed. FIG. 4B is a cross-sectional view for explaining the above, in which (B) shows a state in which the door 2 is closed to the main body 1, (C) shows a state in which the door 2 is opened about 45 degrees, and (D) shows the door 2 It is a figure which shows the state opened about 90 degrees.

When the door 2 is closed, as shown in FIG. 2B, the rotary shaft 4 on the side surface of the door 2 has the major axis in the upward and downward directions, and coincides with the major axis direction of the bearing hole 3. The slit 5 is not pressed by the bearing hole 3, and the upper and lower parts of the rotary shaft 4 are in contact with the upper side and the lower side of the bearing hole 3.

When the door 2 is opened to the front by about 45 degrees, the rotary shaft 4 rotates in the direction of the arrow as shown in FIG. Due to this, the width A ′ of the slit 5 is pushed in a direction of narrowing, the tip end portion of the rotary shaft 4 bends inward, friction occurs between the rotary shaft 4 and the bearing hole 3, and the opening of the door 2 slows down.

Further, when the door 2 is opened to approximately 90 degrees, the slit 5 of the rotary shaft 4 has a width A ″ of the slit 5 further increased by the left and right surfaces of the bearing hole 3 as shown in FIG. It is pushed so as to contract, the bending of the tip portion of the rotary shaft 4 increases, the friction between the rotary shaft 4 and the bearing hole 3 increases, and the opening of the door 2 further slows down.

By appropriately setting the thickness of the rotary shaft 4, the depth of the slit 5, the material of the rotary shaft 4, and the like, the degree of friction between the rotary shaft 4 and the bearing hole 3 is adjusted, Proper friction is generated according to the opening angle of 2.

In the above description, the rotating shaft 4 has a D-shaped cross section, and the left and right surfaces of the bearing hole 3 are straight and long holes. However, the rotating shaft 4 has a circular cross section and a slit. Alternatively, the bearing hole 3 may be provided in a vertically elongated elliptical shape.

[0013]

[Effect of device]

 As described above, according to the door opening / closing device of the present invention, the friction between the rotating shaft and the bearing hole gradually increases as the door is opened, so that the door suddenly opens due to its own weight. Never. This device has an effect depending on the shape of the bearing hole and the shape of the rotating shaft, and does not require a hydraulic damper mechanism or a pneumatic damper mechanism. Can be easily adopted.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of a door opening / closing device according to the present invention.

FIG. 2 is a diagram for explaining rotation of a rotating shaft when opening and closing a door.

[Explanation of symbols]

 1 Main body 2 Door 3 Bearing hole 4 Rotating shaft 5 Slit

Claims (3)

[Scope of utility model registration request] 1. A main body having an oval bearing hole provided on a side surface of a recess, an oval cross section, a major axis of which corresponds to a major axis of the bearing hole, and a minor axis of which is shorter than a minor axis of the bearing hole. It is composed of a door body having a rotary shaft with a slit formed in the radial direction on its side surface, and when the door body is closed in the recess of the main body, the major axis of the bearing hole and the major axis of the rotary shaft are in the same direction. An opening / closing device for a door body, which is characterized in that 2. The door body opening / closing device according to claim 1, wherein the bearing holes are provided on both side surfaces of the recess of the main body, and the rotary shafts are provided on both sides of the door body at positions corresponding to the bearing holes. 3. The bearing hole has an elongated hole shape having a straight minor axis portion, and the rotary shaft has a shape of two pieces having a D-shaped cross section facing the object with respect to the slit. The door opening / closing device according to claim 1.