JP3784457B2 - Door closer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a novel door closer that does not use hydraulic oil.
[0002]
[Prior art]
As a thing often used with the conventional door closer, the thing of the format described in Japanese Utility Model Publication No. 2-85780 can be mentioned, for example.
[0003]
The closer is configured to attenuate an excessive closing force caused by a return spring when the door is closed by hydraulic oil, a cylinder filled with hydraulic oil, a first chamber in the front, and a second chamber in the rear. A piston that divides the first chamber and the second chamber through an orifice, a return spring that biases the piston toward the first chamber, a rack provided on the piston, a rack And a rotating shaft that is supported by the cylinder and to which the pinion and the arm are fixed.
[0004]
[Problems to be solved by the invention]
However, the conventional closer described above uses the viscous resistance when hydraulic fluid passes through the orifice to buffer the closing movement of the closer, so that the sealing process (sealing process) around the cylinder at the time of manufacture is limited. It is cumbersome and expensive, and there is a possibility that oil leakage will occur during long-term use.
[0005]
In addition, since the viscous resistance of the hydraulic oil changes depending on the temperature, the degree of buffering must be adjusted according to the season, which is also a problem in terms of maintenance management.
[0006]
Therefore, the door closer of the present invention should be a non-oil type that does not use hydraulic oil in order to solve the above-described problems, and a sufficient damping force can be obtained when the door is closed as in the conventional case. It has been proposed as a purpose.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a hollow frame attached to a door or a door frame, a rack that is guided and moved in the length direction in the frame, A return spring to be biased to the position side, a pinion that meshes with the rack, a main rotation shaft that is rotatably supported by the frame body, to which the pinion is fixed and to which the linkage arm is attached, and a main rotation through a one-way clutch A gearbox connected to the shaft, a guide rod protruding perpendicularly to the output shaft of the gearbox, a weight for damping rotational movement mounted slidably on the guide rod, and guiding the weight A return spring that biases the base end of the rod toward the base end , and in operation, from a return spring that is supplied in parallel to the door and a rotating system connected to the main rotating shaft via a one-way clutch. Elastic energy is called kinetic energy increase of rotating system Absorbs the rotation system in modal attenuates the door Te following, when the door is closed, separately from the main rotating shaft rotating system with one-way clutch, characterized in that so as to idle by inertia.
[0008]
According to a second aspect of the present invention, there is provided a hollow frame attached to the door or the door frame, a rack adapted to be guided and moved in the length direction within the frame, and biasing the rack to the normal position side. A return spring, a pinion that meshes with the rack, a main rotary shaft that is rotatably supported by the frame, to which the pinion is fixed and to which the linkage arm is attached, and an increase connected to the main rotary shaft via a one-way clutch. A speedometer, a guide rod projecting at right angles to the output shaft of the speed increaser, and having a male threaded portion formed on the base end portion screwed into a female screw hole formed on the output shaft of the speed increaser, and a guide It is equipped with a weight for rotational movement damping that is slidably mounted on the rod, and a return spring that biases the weight toward the proximal end of the guide rod . During operation, the door and the one-way clutch are used. From the return spring supplied in parallel to the rotating system connected to the main rotating shaft. The elastic energy is absorbed into the rotating system in the form of increasing the kinetic energy of the rotating system, so that the door is damped, and when closing the door, the rotating system is separated from the main rotating shaft by a one-way clutch and is idled by inertia. characterized in that it was.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
1 to 3 show a door closer according to an embodiment of the present invention as set forth in claim 1, wherein reference numeral 1 denotes a frame having a hollow and elongated box shape attached to the door 10 or the door frame with a screw or the like, Reference numeral 11 denotes an attachment substrate that forms a part of the frame 1, and 12 denotes a cover plate attached to one end of the frame 1 in the length direction.
[0010]
Inside the frame body 1 is provided a rack 2 that can be displaced along the length direction of the frame body 1. The rack 2 is guided so as to be movable left and right in FIG. 1 by a part of a fixed receiving frame 14 provided in the frame 1 or an appropriate rack guide (not shown).
[0011]
Reference numeral 3 denotes a return spring, such as a compression spring, for biasing the rack 2 to the normal position (position where the door claw is in a non-operating state when the door is closed), and one end of the rack 2 and the side plate 13 of the frame 1. Between them.
[0012]
On the other hand, a vertical main rotating shaft 4 with both ends or one end projecting outward is rotatably supported at the center portion of the frame body 1, and the main rotating shaft 4 is a pinion that meshes with the rack 2 described above. 45 is fixed.
[0013]
In addition, one of the linkage arms (not shown) is fixed to both or one outer end of the main rotating shaft 4. The other end of the linkage arm (not shown) is connected to a fixed portion such as a door frame via another linkage arm, as in the case of a conventional door closer.
[0014]
Further, a drive-side first bevel gear 41 is mounted on the main rotating shaft 4 in the frame body 1 via a one-way clutch (not shown), and the first bevel gear 41 is driven-side. A second bevel gear 42 is engaged.
[0015]
The one-way clutch is not shown, but is incorporated in the first bevel gear 41, and when the door 10 is opened from the closed state (for example, when the main rotating shaft 4 rotates in the direction of arrow A in FIG. 1). A) The main rotating shaft 4 and the first bevel gear 41 are idle so that the rotation of the main rotating shaft 4 is not transmitted to the second bevel gear 42.
[0016]
Conversely, when the door is closed, the one-way clutch transmits the rotational force of the main rotating shaft 4 to the second bevel gear 42 through the first bevel gear 41. As this one-way rotation type clutch, for example, any conventionally known one such as one in which a roller is fitted in an inclined hole or one using an urging claw can be adopted.
[0017]
The second bevel gear 42 is supported by a fixed receiving frame 14 or the like in the frame 1, and the horizontal rotating shaft 43 of the second bevel gear 42 extends into the space of the receiving frame 14.
[0018]
Around the rotation shaft 43 of the second bevel gear 42, a plurality of sets (four sets in the illustrated example) of speed increasing planetary gear mechanisms 5 and 5 are connected in the axial direction.
[0019]
Each speed increasing planetary gear mechanism 5 includes an input-side internal gear 51, a plurality of planetary gears 52, 52, a fixed carrier 53 that supports the planetary gear 52 with a support shaft, and an output-side sun gear 54.
[0020]
Here, in the first speed increasing planetary gear mechanism 5, the internal gear 51 is fixed to the rotating shaft 43 of the second bevel gear 42, and the first sun gear 54, the second internal gear 51, and the second The sun gear 54 and the third internal gear 51, and the third sun gear 54 and the fourth internal gear 51 are integrally formed, and both of them are the rotation shaft 43 of the second bevel gear 42. Is supported around.
[0021]
The output shaft 55 of the final (fourth) speed increasing planetary gear mechanism 5 is provided integrally with the final (fourth) sun gear 54 and protrudes laterally from the receiving frame 14.
[0022]
The fourth sun gear 54 is assembled so as to be rotatable relative to the rotation shaft 43 of the second bevel gear 42, and is supported rotatably on the receiving frame 14.
[0023]
The output shaft 55 is provided with rotational motion attenuating means 6 for attenuating the high speed rotation.
[0024]
The damping means 6 includes a guide rod 61 projecting at right angles (radial direction) to the output shaft 55, and a weight 62 for rotational motion damping that is slidably mounted on the guide rod 61 and has, for example, a bottomed cylindrical shape. And a return spring 63 that biases the weight 62 toward the proximal end of the guide rod 61, that is, toward the output shaft 55.
[0025]
In the illustrated example, the return spring 63 is a compression coil spring wound around the guide rod 61, and a flange provided at the bottom of a cylindrical weight 62 that penetrates the guide rod 61 and the tip of the guide rod 61. It is provided between the part 64.
[0026]
Next, the operation of the door closer according to the present invention will be described. When the main door 4 is rotated in the direction of arrow A in FIG. 1, for example, through the linkage arm when the closed door is opened, the rack 2 moves against the return spring 3 via the pinion 45 on the right side in FIG. Displacement in the direction of arrow B).
[0027]
At this time, the transmission of the rotation of the main rotary shaft 4 to the first bevel gear 41 is cut off due to the presence of a one-way clutch (not shown) built in the first bevel gear 41, and the speed increasing planetary gear Since the mechanism 5 and the rotational motion damping means 6 are kept in an inoperative state and do not serve as a resistance to rotation of the main rotary shaft 4, the door 10 can be opened relatively lightly.
[0028]
On the other hand, when the hand is released from the door 10, the rack 2 moves to the left (in the direction opposite to the arrow B) in FIG. 1 due to the elasticity of the return spring 3, and the main rotary shaft 4 is moved by the rack 2 via the pinion 45. It rotates in the direction opposite to the arrow A, and the linkage arm operated by the main rotary shaft 4 moves backward to close the door.
[0029]
At that time, the one-way clutch is engaged, the first bevel gear 41 rotates together with the main rotary shaft 4, and the second bevel gear 42 meshing with the first bevel gear 41 naturally rotates. The rotation of the second bevel gear 42 is transmitted to the output shaft 55 while being sufficiently accelerated by the plurality of sets of speed increasing planetary gear mechanisms 5 and 5.
[0030]
When the output shaft 55 rotates at a high speed and a centrifugal force is applied to the weight 62 in the rotational motion damping means 6, the weight 62 moves on the guide rod 61 toward the tip side against the return spring 63. .
[0031]
As a result, the moment of inertia of the output shaft 55 increases, and this increase in moment of inertia is applied to the main rotating shaft 4 as the square of the speed increasing ratio of the speed increasing planetary gear mechanism 5.
[0032]
Then, since the moment of inertia of the output shaft 55 becomes the square of the speed increasing ratio when viewed from the main rotating shaft 4, the rotation of the main rotating shaft 4 is attenuated by the increase of the inertia moment of the rotating system.
[0033]
In other words, the elastic energy released when the return spring 3 is extended accelerates this in the case of a rotating system having no damping means. In the door closer according to the present invention, the so-called flywheel governor dampens the rotational motion. Since the means 6 absorbs the elastic energy released by the return spring 3 in the form of an increase in the kinetic energy of the rotating system, the rotation of the main rotating shaft 4 is attenuated.
[0034]
In other words, the kinetic energy of the rotating system is proportional to the moment of inertia multiplied by the square of the rotational speed. Therefore, when the inertial moment of the rotating system is constant, the rotational speed is Monotonically increasing.
[0035]
However, in the door closer according to the present invention, the elastic energy supplied from the return spring 3 to the rotating system is absorbed by the rotating system in the form of an increase in kinetic energy due to an increase in the moment of inertia.
[0036]
If the mass of the weight 62 and the spring constant of the return spring 63 are set appropriately, the rotation of the main rotation shaft of the door closer becomes a constant rotation (the apparent rotational acceleration is zero) at a constant rotational speed, and the door Is closed while buffered.
[0037]
After the door is closed, the rack 2 and the main rotating shaft 4 meshing with the rack 2 are stopped, but the rotating system after the first bevel gear 41 attached to the main rotating shaft 4 via the one-way clutch is unidirectional due to inertia. It slips on the clutch while slipping and stops smoothly with the kinetic energy absorbed mainly by friction.
[0038]
In the door closer according to the second aspect of the present invention, as shown in FIG. 4, a male thread portion formed at the base end portion (upper end portion of FIG. 4) of the guide rod 61 is formed on the output shaft 55 perpendicularly to the axis thereof. Only the point screwed into the female screw hole is different from that of the first aspect of the invention, and in FIG. 4, the part denoted by the same reference numeral as FIG. 1 shows the same part as FIG. 1.
[0039]
The door closer shown in FIG. 4 can change the distance from the output shaft 55 of the flange portion 64 by turning the flange portion 64 of the guide rod with, for example, a finger, and the change in the distance increases or decreases the moment of inertia of the rotating system. As a result, there is an advantage that the buffer capacity of the door closer can be adjusted.
[0040]
In the illustrated embodiment, the speed increaser is configured by connecting a plurality of planetary gear mechanisms in series. Needless to say, a normal speed increaser using a spur gear can be used. .
[0041]
【The invention's effect】
The door closer according to the present invention described above uses the moment of inertia of the weight for damping the rotational motion to buffer the closing motion of the door, so that the oil sealing process is not required in the production and the cost can be reduced. In addition, there is an effect that there is no worry of oil leakage during use.
[0042]
Further, according to the door closer of the present invention, there is no restriction on the design of the speed increaser, and since the speed increase ratio can be set large, it is possible to obtain sufficient damping as usual when the door is closed, and furthermore, braking force (damping force) ) Does not change with temperature and does not require adjustment by temperature.
[0043]
Moreover, according to invention of Claim 2, there exist various effects, such as adjustment of the buffer capacity of a door closer.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view showing an embodiment of a door closer according to the present invention.
FIG. 2 is a side view of the cover plate partially cut away.
3 is an exploded perspective view showing parts of a main rotating shaft, a first bevel gear, a second bevel gear, and a first speed increasing planetary gear mechanism in the door closer of FIG. 1. FIG.
FIG. 4 is a partial cross-sectional side view of a guide rod support portion showing the main part of the invention according to claim 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Door 1 Frame 2 Rack 3 Return spring 4 Main rotating shaft 41 First bevel gear 42 Second bevel gear 43 Rotating shaft 45 Pinion 5 Speed increasing planetary gear mechanism 55 Output shaft 61 Guide rod 62 Weight 63 Return spring

Claims (2)

A hollow frame attached to a door or door frame, a rack that is guided and moved in the length direction within the frame, a return spring that biases the rack toward the normal position, a pinion that meshes with the rack, and a frame A main rotary shaft that is rotatably supported by the body, to which a pinion is fixed, and to which a linkage arm is attached, a gearbox connected to the main rotary shaft via a one-way clutch, and an output shaft of the gearbox right angle with the guide rod projecting from the weight of the rotary motion attenuation slidably mounted on the guide rods, it and a return spring for urging toward the weight on the proximal end side of the guide bar In operation, the elastic energy from the return spring supplied in parallel to the door and the rotating system connected to the main rotating shaft via the one-way clutch is converted into the rotating system in a manner of increasing the kinetic energy of the rotating system. Absorbs and thus damps the door and rotates when the door is closed The one-way clutch disconnecting the main rotating shaft, characterized in that so as to idle by inertia door closer. A hollow frame attached to a door or door frame, a rack that is guided and moved in the length direction within the frame, a return spring that biases the rack toward the normal position, a pinion that meshes with the rack, and a frame A main rotary shaft that is rotatably supported by the body, to which a pinion is fixed, and to which a linkage arm is attached, a gearbox connected to the main rotary shaft via a one-way clutch, and an output shaft of the gearbox A guide rod that protrudes at a right angle to a male screw portion formed at the base end and screwed into a female screw hole formed on the output shaft of the gearbox, and a rotational motion damping that is slidably attached to the guide rod A rotating system connected to the main rotating shaft via a door and a one-way clutch during operation. The elastic energy from the return spring supplied in parallel to the It absorbed in the rotating system in a manner that increases the dynamic energy, attenuates the door Te following, when the door is closed, to disconnect the rotating system by the one-way clutch from the main rotating shaft, characterized in that so as to idly by inertial door closer .

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