JP2001329743A - Door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door closer capable of easily adjusting the door opening and closing speed. SOLUTION: This door closer is formed of a main shaft 6 fitted to a main body freely to be rotated, a spring 7 for rotating the main shaft 6, and a piston mechanism 8 for controlling the rotating speed of the main shaft. Pitch of a screw of a screw rod 89 for moving a moving material 88 of the piston mechanism 8 is formed at 0.6 mm or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a door closer.

[0002]

2. Description of the Related Art Doors attached to entrances of buildings and the like include:
Usually, a door closer is attached. This door closer has various structures.
As disclosed in Japanese Patent No. 4134, there is known a door closer in which a spring spring is combined with a control mechanism that fills an enclosed space with oil. Further, a door closer including a main shaft rotatably attached to the main body, a spring spring for rotating the main shaft, and a piston mechanism for controlling the rotation speed of the main shaft is often used.

In this door closer, a main body is attached to a door, a main shaft is attached to one end of an arm, and the other end of the arm is attached to a door frame for use. Then, when the door opens and closes, the main shaft rotates in conjunction with the arm via the arm. The spring spring presses the main shaft in the direction to close the door, and when the door is opened against the force of this spring, the door automatically closes due to the elasticity of this spring. It is,
At this time, a piston mechanism for controlling the rotation speed is attached to the main shaft, so that when the door is closed, it is possible to prevent the door stop from violently colliding with the door stop and generating loud noise.

[0004] There are various piston mechanisms for controlling the closing speed of the door, but the most common one is a piston cylinder, a viscous liquid filled in the piston cylinder, and a viscous liquid filled in the piston cylinder. , A connecting rod connecting the piston and the main shaft, a liquid port provided at the front and rear positions of the piston of the piston cylinder, a passage connecting the liquid port at the front and rear positions of the piston, and this passage And a screw rod for moving the moving material to increase or decrease the opening area of the liquid port. The head of the screw rod is exposed on the end face of the piston cylinder.

The operation of the piston mechanism will be described. Attach the door closer so that the spring rotates the spindle in the direction to close the door. Then, after the door is pushed open, when the force of opening the door disappears, the spring spring presses the main shaft to rotate in the closing direction of the door.

A piston is connected to the main shaft via a connecting rod, and when there is no liquid port and no moving material, the piston moves in a piston cylinder filled with viscous liquid. The main shaft does not rotate even if the spring spring presses the main shaft to rotate, but the front and rear stomach of the piston of the piston cylinder has a liquid port and a passage connecting the liquid port. Since a moving member is provided for moving in the passage to increase or decrease the opening area of the liquid inlet / outlet, when the spring spring presses the main shaft to rotate, the pressure of the spring spring rotating the main shaft increases by the piston. And the viscous liquid before and after the piston moves from one side to the other through the liquid port and the passage.

As a result, the piston moves as much as the viscous liquid moves. At this time, if the opening area of the liquid port is reduced by the moving material, the viscous liquid cannot rapidly pass through the opening of the liquid port reduced by the moving material, and the rotation speed of the main shaft is limited. . In this way, on the door with the door closer attached, after pushing the door open,
When there is no more force to open the door, the door closes in conjunction with the rotation of the main shaft pressed by the spring spring, but when this door closes, the rotation speed of this main shaft is limited by the piston mechanism, and the door vigorously hits the door Do not collide. As a result, no loud sound is generated.

When the head of the screw rod exposed on the end face of the piston cylinder is rotated by a screwdriver, the screw rod rotates, the moving material having a passage moves, and the opening area of the liquid port increases and decreases. As a result, the passing speed of the viscous liquid changes, and the closing speed of the door can be adjusted.
At this time, the thread pitch of the threaded rod is 0.75 mm / rotation or more. When the speed at which the door closes is reduced in this way, the sound of colliding with the door stop is reduced, but the time until the door closes is increased, which is inconvenient.

Therefore, the opening / closing section of the door is, for example, a section at the moment when the door is closed from the position where the door is closed to a position opened by about 15 ° (hereinafter referred to as a first section), for example, about 1
It is divided into the other section (hereinafter referred to as the second section) from the position opened by 5 ° to the one further opened (hereinafter referred to as the second section), the closing speed of the door in the second section is increased, and the closing speed of the door in the first section is increased. Resolving both problems has also been attempted by slowing it down. Further, the second section is divided into three stages, for example, from a position opened by about 15 ° to a position opened by about 35 °, and a non-standing other section of about 35 ° or more is set as a third section. In some cases, the door opening / closing speed of the section is further increased.

As described above, the means for changing the opening / closing speed of the door after the first section and the second section includes a liquid inlet / outlet provided at the front and rear positions of the piston, a passage through which the viscous liquid passes, and this passage. A plurality of sets of moving materials that move through the inside of the liquid to increase or decrease the opening area of the liquid inlet and outlet, and a plurality of screw rods that move this moving material are provided, and each group is assigned to each section, and moved with each screw rod By moving the material to increase or decrease the opening area of the liquid port, in the first section, it is difficult to pass the viscous liquid, and the closing speed of the door is slowed down. The liquid is made to easily pass through sequentially, and the closing speed of the door is sequentially increased.

In this case, the pitch of the screw of the screw rod for moving the moving member of the piston mechanism for controlling the rotation speed of the main shaft in conjunction with the opening and closing of the door in the first section is 0.75 in the same manner as described above.
mm / rotation or more.

[0012]

Before the door closer is mounted on the door, the speed of passage of the viscous liquid passing through the liquid inlet and outlet and the passage is adjusted in advance to adjust the opening / closing speed of the door. The opening / closing speed of this door depends on the weight of the door to which the door closer is attached, the resistance at the time of opening and closing the door, etc., and there are no people who prefer to close the door faster than the generation of sound or no louder sound than the door closes faster The optimal closing speed of the door also differs depending on the preference of the user, such as the person who likes the thing.

[0013] In addition, during use for many months, the elasticity of the spring and the viscosity of the viscous liquid change, and the closing speed of the door gradually changes. Sometimes you want to return to the state. In such a case, the screw rod is rotated to increase or decrease the opening area of the liquid inlet / outlet to adjust the rotation speed of the main shaft, but this adjustment is difficult.

Therefore, the shapes of the moving material and the liquid inlet / outlet were changed, and the viscous liquid was changed. However, all of them were very complicated and required to cope with the elasticity of the spring and the change in the viscosity of the viscous liquid. As a result, it was not possible to change the shape of the moving material or the liquid inlet / outlet, or to change the liquid, so that good results could not be obtained. Therefore, an object of the present invention is to provide a door closer that can easily adjust the opening and closing speed of the door.

[0015]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. According to the first aspect of the present invention, there is provided a main shaft rotatably mounted on a main body, and the main shaft is rotated. It consists of a spring spring and a piston mechanism for controlling the rotation speed of the main shaft. The piston mechanism reciprocates in the piston cylinder, the viscous liquid filled in the piston cylinder, and the viscous liquid. And a connecting rod connecting the piston and the main shaft,
A liquid port provided at the front and rear positions of the piston of the piston cylinder, a passage connecting the liquid port provided at the front and rear positions of the piston, and a moving member that moves in the passage to increase or decrease the opening area of the liquid port. And a screw rod for moving the moving material, wherein the screw rod is mounted with its head exposed on the end face of the piston cylinder, and the screw pitch of the screw rod is 0.6 mm /
This is what is done below the rotation.

The invention according to claim 2 comprises a main shaft rotatably mounted on the main body, a spring spring for rotating the main shaft, and a piston mechanism for controlling the rotation speed of the main shaft. A piston cylinder, a viscous liquid filled in the piston cylinder, a piston reciprocating in the viscous liquid, a connecting rod connecting the piston and the main shaft, and a piston rod of the piston cylinder. A liquid inlet / outlet provided, a passage connecting the liquid inlet / outlet provided at the front and rear positions of the piston, a moving member moving in the passage to increase / decrease the opening area of the liquid inlet / outlet, and a screw moving the moving member. A door closer comprising a rod, wherein a door opening / closing section has a first section from a closed position to a position opened by about 15 ° and a position opened by about 15 °. And a second section extending from the first section to a further open position. The piston mechanism is provided with a liquid inlet / outlet and a passage for controlling a rotation speed of a main shaft interlocked with opening and closing of doors in the first section and the second section. A set of a material and a screw rod is provided independently of each other, and a set of screw rods for controlling the rotation speed of the main shaft in conjunction with opening and closing of the door in the first section is mounted with the head exposed on the end face of the piston cylinder, The pitch of the threads of the threaded rod is 0.6 mm / rotation or less.

(Function) According to the first aspect of the present invention, the screw rod is mounted with the head exposed at the end face of the piston cylinder, and the screw pitch of the screw rod is set to 0.6 mm / rotation or less. When the head of the threaded rod exposed on the end face of the piston cylinder is rotated with a screwdriver or the like, the threaded rod rotates and the moving material moves. Few. Therefore, the movable member can be finely moved by rotating the screw rod little by little, and the opening area of the liquid port can be finely adjusted. As a result, it is easier to adjust the closing speed of the door than before, and the sound of the door colliding with the door stop can be adjusted as desired.

According to the second aspect of the present invention, the opening / closing section of the door includes a first section from the closed position of the door to a position opened by about 15 °, and a first section from the opened position of about 15 ° to the position further opened. It is divided into the second section and the piston mechanism
The first section and the second section are independently provided with a liquid inlet / outlet, a passage, a moving member, and a screw rod set for controlling the rotation speed of the main shaft in conjunction with the opening and closing of the doors of the first section and the second section. The flow rate of the viscous liquid is controlled by adjusting the opening area of the liquid inlet and outlet by moving the moving material with independently provided screw rods to adjust the opening area of the liquid inlet / outlet in conjunction with the opening and closing of the doors in the two sections. By separately adjusting, the closing speed of the door in the first section can be reduced as desired and the closing speed of the door in the second section can be increased as desired.

A set of screw rods for controlling the rotation speed of the main shaft in conjunction with the opening and closing of the door in the first section is mounted with its head exposed on the end face of the piston cylinder, and the screw pitch of this screw rod is adjusted. When the head of the screw rod exposed on the end face of the piston cylinder is rotated with a screwdriver or the like, the screw rod rotates and the moving material moves. The moving distance of the moving material with respect to the rotation of is smaller than before.

Therefore, the movable member can be finely moved by rotating the screw rod little by little, and the opening area of the liquid port can be finely adjusted. As described above, according to the second aspect of the invention, the closing speed of the door can be increased as desired, and at the same time, the closing speed of the door can be more easily adjusted than before, and the sound generated when the door is closed can be reduced. Can be as small as desired.

[0021]

Next, embodiments of the present invention will be described with reference to examples. 1 to 5 show an embodiment of the present invention. FIG. 1 is a perspective view showing a state where a first arm and a second arm are attached to a door closer, and FIG. 2A is a cross section of the door closer. (B) is a side view of (a), FIG. 3 is a cross-sectional view for explaining a structure for controlling opening and closing of a door in a first section, FIG. 4 is a perspective view showing a use state of a door closer,
FIG. 5 is a plan view showing the open / close section.

In FIG. 1 to FIG. 5, reference numeral 1 denotes a door attached to an entrance, and this door 1 is rotatably attached to a door frame 11, as shown in FIG. The opening and closing section of the door 1 is, as shown in FIG. 5, a first section M from a closed position to a position opened to about 15 °, and about 1 section.
It is divided into a second section N from a position opened by 5 ° to a position opened to about 35 ° and a third section P at a position opened by about 35 ° or more, and the closing speed of the door in each section is different. It has become.

Reference numeral 2 denotes a door closer. As shown in FIG. 2, the door closer 2 has a main shaft 6 rotatably mounted substantially at the center of the main body 3, and a spring spring provided on one of the main shafts 6. 7 and a piston mechanism 8 provided on the other side of the main shaft 6. As shown in FIG. 1, the door closer 2 is housed in a casing 9 and fixed with screws 91, and the first arm 4 is attached to the main shaft 6.
And the other end of the first arm 4 is connected to the second end.
It is rotatably attached to one end of the arm 5. Then, as shown in FIG. 4, the casing 9 is attached to the indoor side of the door 1, and the other end of the second arm 5 is attached to the door frame 11.

Then, when the door 1 opens and closes, the main shaft 6 rotates in conjunction with the arms 4 and 5. At this time, the spring 7 attaches the main shaft 6 so as to rotate in the direction in which the door 1 closes. The piston mechanism 8 controls the rotational speed of the main shaft 6, and as shown in FIGS. 3 and 4, a piston cylinder 81, a viscous liquid 82 filled in the piston cylinder 81, and a viscous liquid 82. A piston 83 reciprocating in the dense liquid 82, a connecting rod 84 connecting the piston 83 and the main shaft 6, liquid inlets 85, 86 provided at front and rear positions of the piston 83 of the piston cylinder 81, and a piston A passage 87 connecting the liquid ports 85, 86 provided at the front and rear positions of the 83, a moving member 88 that moves in the passage 87 to increase or decrease the opening area of the liquid port 85, and a screw that moves the moving member 8 And a rod 89.

The liquid ports 85 and 86 and the passage 8
7, two sets of moving members 88 and screw rods 89 are provided. The head 891 of the first set of screw rods 89 that controls the rotation speed of the main shaft 6 in conjunction with the opening and closing of the door 1 in the first section N is exposed on the end surface of the piston cylinder 81. By rotating, the screw rod 89 rotates to move the first set of moving members 8.

The head 892 of the second set of screw rods 89 for controlling the rotation speed of the main shaft in conjunction with the opening and closing of the door 1 in the second section N.
Appears on the end face of the piston cylinder 81, and the head 8
By rotating 92 with a screwdriver 95, the screw rod 8
9 rotates so that another group of moving members 8 moves. FIG. 2 shows a first set, in which the screw pitch of the screw rod 89 is approximately 0.5 mm / rotation.

Next, the use state and operation of the door closer will be described. As shown in FIG.
One end of the arm 4 is attached, and the other end of the first arm 4 is rotatably attached to one end of the second arm 5. Then, as shown in FIG. 4, the casing 9 is attached to the indoor side of the door 1, and the other end of the second arm 5 is attached to the door frame 11.

When the door 1 opens and closes, the arms 4, 5
The main shaft 6 inside the main body 3 rotates in conjunction therewith. Then, the spring 7 presses the main shaft 6 to rotate in the direction in which the door 1 closes.
Door 1 is closed. After the door 1 is opened against the force of the spring spring 7 and the opening force is lost, the door 1 is automatically closed by the elasticity of the spring 7. The main shaft 1 is provided with a piston mechanism 3 for controlling the rotation speed, so that the door 1 is gradually closed.

The operation of the piston mechanism 3 will be described. A pressure is applied to the main shaft 6 to rotate the main shaft 6 in a direction in which the door 1 closes by a spring spring 7. A piston 83 is connected to the main shaft 6 via a connecting rod 84.

At the front and rear positions of the piston of the piston cylinder 81, liquid ports 85, 86, a passage 87 connecting the liquid ports 85, 86, and an opening area of the liquid port 85 by moving in the path 87. Material 88 to increase or decrease
Is provided, and when there is no more force to open the door 1,
The elasticity of the spring 7 serves as a pressure for moving the piston 83 in a direction to close the door 1. Then, this pressure causes the viscous liquid 82 before and after the piston 83 to move from one side to the other through the liquid ports 85 and 86 and the passage 87, and as a result, the piston 82 Moves.

At this time, the viscous liquid 82 is transferred to the moving material 88
As a result, the liquid cannot pass through the opening of the liquid inlet / outlet 85 which has become smaller, the rotation speed of the main shaft 6 is restricted, and the closing speed of the door 1 linked to the rotation of the main shaft 6 is restricted.
Are no longer hitting the doorstop. And
When the head 891 of the first set of screw rods 89 exposed on the end face of the piston cylinder 81 is rotated, the screw rods 89 rotate, and the rotation of the screw rods 89 causes the first set of moving members 8 to rotate.
8 moves, the opening area of the liquid inlet / outlet 85 changes, and as a result, the passing speed of the viscous liquid 82 changes. When the head 892 of the second set of screw rods 89 is rotated. Then, the screw rod 89 rotates to move the second set of moving members 88, and the passing speed of the viscous liquid 82 changes.

As described above, the heads 891 and 89 of the screw rod 89 are provided.
By rotating 2, the closing speeds of the doors 1 in the first section and the second section can be separately adjusted. But the first
Since the section M is directly related to the sound generated when the door is closed, the closing speed of the doors of the set of the first section M is often adjusted, and is not related to the change in the closing speed of the door of the second section N. Therefore, the head 892 of the second set of screw rods 89 is rarely rotated, but if necessary, the head 892 of the screw rod 89 is also rotated to adjust the closing speed of the door 1 in the second section N. You may.

Further, the closing speed of the door 1 in the third section P is
Further, since there is no need for adjustment, the door closer 2 of this embodiment is not provided with a mechanism for adjusting the closing speed of the door 1 in the third section.

As described above, in the door 1 to which the door closer 2 is attached, the opening / closing section of the door 1 is substantially equal to the first section M from the closed position to the position opened by about 15 ° and the rotating section of the door 1 is substantially The piston mechanism 8 is divided into a second section N from a position opened by 15 ° to a position opened by about 35 ° and a third section P further than the first section M and the second section N.
The first section M and the second section are provided independently of the liquid inlets and outlets 85 and 86 for controlling the rotation speed of the main shaft 6 in conjunction with the opening and closing of the door 1, the moving member 88 and the screw rod 89. The rotation speed of the spindle 6 linked to the opening and closing of the door 1 of N
The closing speed of the door 1 in the first section M is reduced by rotating the screw rod 89 to separately adjust the cross-sectional areas of the connecting portions of the liquid inlet / outlet 85 and the passage of the moving member 88, and the door in the second section N 1, the closing speed can be increased. The rotation speed of the door 1 in the third section P is adjusted by the manufacturer.

The head of the first set of screw rods 89 for controlling the rotation speed of the main shaft 6 in conjunction with the opening and closing of the door 1 in the first section M appears on the end face of the piston cylinder 81. Since the screw pitch is 0.6 mm / rotation or less, when the head of the screw rod 89 exposed on the end surface of the piston cylinder 81 is rotated by a driver or the like, the screw rod 89 is rotated.
Rotates, and the moving member 88 moves.
The moving distance of the moving member 88 for the rotation of the moving member 88 is smaller than that in the related art.

Therefore, the moving member 88 can be finely moved by rotating the screw rod 89 little by little, and the opening area of the liquid port 85 can be finely adjusted. As a result, it is easier to adjust the closing speed of the door 1 than before, and it is possible to appropriately adjust the sound of the door 1 colliding with the door stop.

[0037]

As described in detail above, according to the first aspect of the present invention, the screw rod is mounted with the head exposed on the end face of the piston cylinder, and the screw pitch of the screw rod is 0.6 mm.
/ Because of the rotation, the head of the threaded rod exposed on the end face of the piston cylinder is rotated with a screwdriver or the like to make it easier to adjust the opening and closing speed of the door than before, and the closing speed of the door and the contact of the door with the door You can finely adjust the sound colliding with.

According to a second aspect of the present invention, the door opening / closing section is
First from the closed position of the door to the open position of about 15 °
The piston mechanism is divided into a section and a second section from a position opened by about 15 ° to a position further opened, and the piston mechanism controls the rotation speed of the main shaft in conjunction with opening and closing of the doors in the first section and the second section. A set of a liquid inlet / outlet, a passage, a moving member, and a screw rod to be controlled are provided independently of each other. And the pitch of the screw of the threaded bar is set to 0.6 mm / rotation, so that the rotation speed of the main shaft linked to the opening and closing of the doors in the first section and the second section is independent of each other. The opening and closing speed of the door in the second section can be increased as desired by finely adjusting the screw rod provided in the door. The sound that collides with the car as desired It can be.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a door closer according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG.

FIG. 3 is a cross-sectional view for explaining a structure for controlling opening and closing of a door in a first section.

FIG. 4 is a perspective view showing a use state of the door closer.

FIG. 5 is a plan view showing an open / close section of a door.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door 2 Door closer 3 Main body 4 1st arm 5 2nd arm 6 Main shaft 7 Spring spring 8 Piston mechanism 81 Piston cylinder 82 Viscous liquid 83 Piston 84 Connecting rod 85, 86 Liquid entrance 87 Passage 88 Moving material 89 Screw rod

Claims (2)

[Claims] 1. A main shaft rotatably attached to a main body, a spring spring for rotating the main shaft, and a piston mechanism for controlling a rotation speed of the main shaft, wherein the piston mechanism includes a piston cylinder, a piston cylinder, A viscous liquid filled in the inside of the viscous liquid, a piston reciprocating in the viscous liquid, a connecting rod connecting the piston and the main shaft, and a liquid inlet and outlet provided at the front and rear positions of the piston of the piston cylinder. A door that includes a passage connecting the liquid port provided at the front and rear positions of the piston, a moving member that moves in the passage to increase or decrease the opening area of the liquid port, and a screw rod that moves the moving member. Wherein the screw rod is mounted with its head exposed on the end face of the piston cylinder, and the screw pitch of this screw rod is reduced to 0.6 mm / rotation or less. A door closer characterized by being made. 2. A main shaft rotatably attached to a main body, a spring spring for rotating the main shaft, and a piston mechanism for controlling a rotation speed of the main shaft, wherein the piston mechanism comprises a piston cylinder, a piston cylinder, A viscous liquid filled in the inside of the viscous liquid, a piston reciprocating in the viscous liquid, a connecting rod connecting the piston and the main shaft, and a liquid inlet and outlet provided at the front and rear positions of the piston of the piston cylinder. A door that includes a passage connecting the liquid port provided at the front and rear positions of the piston, a moving member that moves in the passage to increase or decrease the opening area of the liquid port, and a screw rod that moves the moving member. And the opening and closing section of the door is approximately 15 from the closed position of the door.
° divided into a first section to the open position and a second section from the position substantially 15 ° open to a position further open,
The piston mechanism is provided with a liquid inlet / outlet, a passage, a moving member, and a set of screw rods for controlling a rotation speed of a main shaft interlocking with opening and closing of the doors of the first section and the second section, respectively.
A set of screw rods for controlling the rotation speed of the main shaft that is linked to the opening and closing of the door in the first section is mounted with its head exposed on the end face of the piston cylinder, and the screw pitch of the screw rod is 0.6 mm / rotation. A door closer characterized by the following: