JP4540200B2 - Floor hinge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor hinge that supports a lower end of a door of a building and biases the door in a closing direction.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a floor hinge that is embedded in a floor surface to support a lower end portion of a door of a building and biases the door in a closing direction by a biasing force of a spring housed inside.
[0003]
Such a floor hinge has a main body filled with oil, and is provided with a main shaft that protrudes from the upper end of the main body and is fitted and coupled to the lower end of the door. The main shaft is connected to a piston provided inside the main body so as to be able to reciprocate through a connecting means, and a door is connected to the main shaft through the piston so as to apply a biasing force in a closing direction to a door coupled to the main shaft. The spring for providing a rotational force in the closing direction is provided.
[0004]
In the floor hinge having such a configuration, an opening is formed in the main body at the protruding portion of the main shaft from the main body, and between the inner surface of the lid screwed into the opening and the outer peripheral surface of the main shaft. An O-ring is interposed, and a rubber ring for preventing intrusion such as dust is provided on the upper side of the O-ring so that the lip portion at the upper end is in contact with the outer peripheral surface of the main shaft.
[0005]
However, in such a configuration, a gap is formed between the lip portion and the outer peripheral surface of the main shaft due to wear of the upper lip portion of the rubber ring due to long-term use, and foreign matters such as dust enter from the gap. There is a problem that the O-ring is damaged and an oil leak occurs between the damaged O-ring and the outer peripheral surface of the main shaft.
[0006]
[Problems to be solved by the invention]
The present invention solves such a problem, and prevents foreign matter such as dust from entering between the lip portion at the upper end of the rubber ring and the outer peripheral surface of the main shaft and prevents oil leakage. The object is to provide a floor hinge.
[0007]
[Means for Solving the Problems]
In order to solve this problem, the present invention relates to a main shaft whose upper end protrudes from the upper end of the main body and is coupled to the lower end of the door, and is reciprocally connected to the main shaft via a connecting means. The floor hinge includes a piston, a spring that applies a rotational force in the door closing direction to the main shaft via the piston, and a filled oil to give a biasing force in the closing direction to a door coupled to the main shaft. In addition, an opening is formed at the upper end of the main body in the protruding portion of the main shaft from the main body, and an O between the inner surface of the lid screwed into the opening to close the opening and the outer peripheral surface of the main shaft. A rubber ring for preventing intrusion of dust and the like is provided on the upper side of the O-ring so that the upper end lip is in contact with the outer peripheral surface of the main shaft. On the case body The lid plate is housed in a case made up of a lid plate, and the lid plate has a hole that fits into the lid so as to project the lid upward, and further projects upward from the hole. A cap is provided to cover the top of the lid, and the cap includes a plate portion having a circular shape in a horizontal plane at the upper end, and a plate portion bent downward from the outer periphery of the plate portion. A circular hole is formed in the center of the plate part, and a ring made of hard rubber is provided on the inner periphery of the hole part, and a main shaft coupled to the lower end part of the door is connected to the cap on which the ring is mounted. Cover the shoulder of the upper end of the bulge part slightly below the upper end part so that the inner periphery of the ring is in pressure contact, and the lower end of the plate part bent downward is slightly away from the upper surface of the lid plate Is configured as It is an gist and.
[0008]
With this configuration, the inner periphery of the ring made of hard rubber attached to the inner periphery of the cap is in pressure contact with the shoulder of the upper end of the bulge portion slightly below the upper end portion of the main shaft coupled to the lower end portion of the door, Since the lower end of the downward plate portion of the cap is slightly away from the upper surface of the lid plate, the cap rotates together with the rotation of the main shaft. In this state, since the inner periphery of the ring is pressed against the shoulder at the upper end of the bulge portion of the main shaft, the entry of foreign matter such as dust from this portion is prevented, resulting in damage to the O-ring located inside. And oil leakage can be prevented.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 to 4, reference numeral 1 denotes a main body of a floor hinge, and a main shaft 3 that protrudes from the upper end of the main body 1 and is fitted to the lower end of the door 2 by fitting the upper end 3 a is provided inside the main body 1. It has been. The main shaft 3 is connected to a piston 4 provided inside the main body 1 so as to be reciprocally movable through a connecting means, and the piston 4 is attached to the door 2 coupled to the main shaft 3 in order to apply a biasing force in the closing direction. A spring 5 is provided to apply a rotational force to the main shaft 3 in the door closing direction.
[0010]
By the way, an opening 6 is formed at the upper end of the main body 1 at the projecting portion of the main shaft 3 from the main body 1, and the inner surface of the lid 7 and the main shaft 3 screwed into the opening 6 to close the opening 6. An O-ring 8 is interposed between the outer peripheral surface and a backup ring 9 is interposed above the O-ring 8. Further, a rubber ring 10 for preventing intrusion of dust and the like is disposed above the backup ring 9 at the upper end. The lip portion 10 a is provided so as to be in contact with the outer peripheral surface of the main shaft 3. The main body 1 is filled with oil.
[0011]
The main body 1 provided with the main shaft 3, the piston 4, the spring 5, and the like as described above is housed in a case 11 formed of an iron plate. The case 11 is composed of a case body 11a that opens at the upper end and puts the body 1 and a lid plate 11b that closes the upper end of the case body 11a. The lid plate 11b includes the O-ring 8, the backup ring 9, and dust. A hole 11c that fits with the lid 7 is formed so that the lid 7 that encloses the rubber ring 10 for preventing intrusion protrudes upward.
[0012]
In the embodiment of the present invention, in addition to the above-described configuration, a metal cap 12 is provided to cover the lid body 7 protruding upward from the hole 11c. The cap 12 includes a plate portion 12a having a circular horizontal top shape at the upper end and a plate portion 12b bent downward from the outer periphery of the plate portion 12a, and a circular hole 12c is formed at the center of the plate portion 12a. A ring 13 made of hard rubber is provided by integral molding on the inner periphery of the hole 12c. The relationship between the cap 12 and the ring 13 is shown in an enlarged manner in FIG. 4, and the ring 13 is attached to the cap 12 so that the groove 13a on the outer periphery of the ring 13 fits into the inner periphery of the hole 12c. Thus, the inner periphery of the ring 13 is placed on the shoulder 3c of the upper end of the bulging portion 3b slightly below the upper end 3a of the main shaft 3 where the cap 12 with the ring 13 attached is coupled to the lower end of the door 2. Cover the lid 7 so as to be in pressure contact. At this time, the plate portion 12a of the cap 12 having the ring 13 whose inner periphery is in pressure contact with the shoulder portion 3c at the upper end of the bulge portion 3b protruding slightly upward from the lid body 7 is placed on the upper surface of the lid body 7. However, the lower end of the plate portion 12b is configured to be slightly separated from the upper surface of the lid plate 11b.
[0013]
【The invention's effect】
As described above, according to the present invention, the inner portion of the ring made of hard rubber attached to the inner periphery of the cap on the shoulder of the upper end of the bulge portion slightly below the upper end portion of the main shaft coupled to the lower end portion of the door. While the circumference is pressed, the lower end of the downward plate portion of the cap is slightly separated from the upper surface of the lid plate, so that the cap rotates together with the rotation of the main shaft. In this state, since the inner periphery of the ring is pressed against the shoulder at the upper end of the bulge portion of the main shaft, the entry of foreign matter such as dust from this portion is prevented, resulting in damage to the O-ring located inside. And oil leakage can be prevented.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a floor hinge according to an embodiment of the present invention.
FIG. 2 is an overall cross-sectional view of the floor hinge.
FIG. 3 is an enlarged sectional view of a main part of the floor hinge.
FIG. 4 is an enlarged cross-sectional view of a cap attached to the floor hinge.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Door 3 Main shaft 3a Upper end part 3b Swelling part 3c Shoulder part 4 Piston 5 Spring 6 Opening part 7 Cover body 8 O-ring 9 Backup ring 10 Rubber ring 10a for preventing entry of dust etc. Lip part 11 Case 11a Case body 11b Cover plate 11c Hole 12 Cap 12a Plate 12b Plate 12c Hole 13 Ring 13a Groove

Claims (1)

A main shaft whose upper end protrudes from the upper end of the main body and is coupled to the lower end of the door, a piston that is reciprocally movable and coupled to the main shaft via a coupling means, and a door coupled to the main shaft. A floor hinge provided with a spring for applying a rotational force in the door closing direction to the main shaft through the piston in order to give a biasing force in the closing direction, and a filled oil, etc., on the protruding portion of the main shaft from the main body An opening is formed at the upper end of the main body, and an O-ring is interposed between the inner surface of the lid screwed into the opening to close the opening and the outer peripheral surface of the main shaft. A rubber ring for preventing intrusion of dust and the like is provided on the upper side so that the lip portion at the upper end is in contact with the outer peripheral surface of the main shaft, and the main body includes a case main body formed of an iron plate and a lid plate for closing the upper end of the case main body. K A cap that is fitted in the lid so that the lid projects upward, and the cap covers from above the lid that projects upward from the hole. The cap includes a plate portion having a circular shape in a horizontal plane at the upper end and a plate portion bent downward from the outer periphery of the plate portion, and a circular hole in the center of the horizontal plate portion at the upper end. A ring made of hard rubber is provided on the inner periphery of the hole, and a bulge slightly below the upper end of the main shaft coupled to the lower end of the door with the cap on which the ring is mounted. The lower end of the plate part that bends downward is configured to be in a state slightly separated from the upper surface of the lid plate. Characteristic floor hinge.

Images