JP3985254B2 - Floor hinge - Google Patents

Description

  The present invention relates to a floor hinge, and more particularly to a floor hinge having a structure that prevents damage to packing, dust seals, etc. (hereinafter referred to as “packing etc.”) that contact the main shaft of the floor hinge and prevents oil leakage.

  The floor hinge is embedded in the floor of the building and supports the door main body, and gives the door main body a rotational force in the closing direction. The floor hinge is provided with a main shaft that protrudes from the floor hinge body and is connected to the door main body.

  The main shaft is rotatably supported with a packing or the like in contact with the outer peripheral surface inside the floor hinge body. And the main axis | shaft protrudes from the support hole provided in the top part of the floor hinge main body. However, when the floor hinge is installed in a building, fine debris such as stone and concrete (hereinafter referred to as “dust”) enters the gap between the main shaft of the floor hinge and the support hole. If it does so, packing etc. will be damaged and an oil leak will arise.

  Therefore, the applicant of the present application has proposed a structure in which the gap between the main shaft of the floor hinge and the support hole is covered with a cap in order to prevent damage to the packing and the like and to prevent oil leakage (see Patent Document 1). .

  In the invention described in Patent Document 1, the cap includes a circular plate portion and a plate portion that bends downward from the outer periphery of the circular plate portion, and forms a circular hole at the center of the circular plate portion. ing. A ring made of hard rubber is provided on the inner periphery of the circular hole. The cap is placed so that the inner periphery of the ring is in strong contact with the main shaft. In the state where the cap is put on the main shaft, the lower end of the plate portion bent downward is configured to be slightly separated from the upper surface of the floor plate of the container.

According to this invention, the main shaft and the cap are in strong contact with each other by the ring provided on the cap, and the cap is placed on the gap between the main shaft and the support hole portion of the floor hinge.
JP 2002-81260 A

  However, in the conventional floor hinge, the main shaft and the cap are in strong contact, and when the main shaft rotates by opening and closing the door main body, the cap rotates together with the main shaft. For this reason, the lower end of the plate part that bends downward is separated from the upper surface of the floor plate of the container, so that the cap does not contact the upper surface of the floor plate and noise is generated. There must be a gap between them. Since dust enters from this gap, a sufficient dustproof function cannot be obtained by the cap, and dust enters the gap between the main shaft of the floor hinge and the support hole. If it does so, packing etc. will be damaged and an oil leak will arise.

  In the conventional floor hinge, a ring made of hard rubber is provided on the inner periphery of the hole formed in the cap. However, the process of forming a groove on the outer periphery of the ring and the operation of attaching the ring to the inner periphery of the hole portion require a lot of work, which causes an increase in the cost of the floor hinge.

  Accordingly, a first object of the present invention is to provide a floor hinge that prevents dust from entering the gap between the main shaft and the support hole, and prevents damage to the packing and oil leakage.

  A second problem is to reduce the number of processing steps and reduce the cost, and to provide the floor hinge at a low cost.

In order to achieve the object, in the invention according to claim 1,
A main shaft that is connected to the door main body and applies a rotational force in the closing direction to the door main body;
The main shaft is rotatably supported by bringing packing or the like into contact with the outer peripheral surface of the main shaft, and a rotational force in the door closing direction is applied to the main shaft, and from a support hole provided in a convex portion protruding from the top. A floor hinge body for projecting the main shaft so as to expose a circular section of the main shaft;
A housing for housing the floor hinge body and projecting the main shaft from the projecting hole;
It is formed of a material having elasticity, and has a dustproof material upper portion provided with a penetrating hole portion having a diameter smaller than the diameter of the cross-sectional circular portion of the main shaft, and the circular cross-sectional portion of the main shaft is penetrated into the penetrating hole portion, And the dustproof material attached to the main shaft so that the lower surface of the upper part of the dustproof material is in contact with the peripheral edge of the support hole of the floor hinge body,
The upper part of the cap has a cap upper part provided with a mounting hole having a diameter larger than the diameter of the circular section of the main shaft, and the circular section of the main shaft to which the dustproof material is attached penetrates into the mounting hole. A cap in which the tip part of the downward cap side part extending to the peripheral part of the floor is in contact with the top part of the floor hinge body, or the container,
A floor hinge having

  Here, “rotation” is a concept including not only the case where the turning angle is 360 degrees or more but also the case where the turning angle is 360 degrees or less.

  According to a second aspect of the present invention, in the first aspect of the present invention, a dustproof material side portion that extends downward is extended to the peripheral portion of the dustproof material, and the dustproof material side portion is provided on the side surface of the convex portion of the floor hinge body. The dustproof material was attached to the main shaft in contact.

  According to a third aspect of the present invention, in the first aspect of the present invention, a dustproof material side portion facing downward is extended from a peripheral portion of the dustproof material, and the dustproof material side portion is provided on a side surface of the convex portion of the floor hinge body. At the same time, the tip of the dustproof material side is brought into contact with the top of the floor hinge body or the container, and the dustproof material is attached to the main shaft.

(Function)
Therefore, in the invention according to claim 1, since the dustproof material is provided with a penetration hole portion having a diameter smaller than the diameter of the circular section of the main shaft, and the dustproof material is formed of a material having elasticity, the main shaft When the circular cross-sectional portion is inserted into the through-hole portion, the dustproof material comes into contact with the main shaft. The lower surface of the upper part of the dustproof material contacts the peripheral edge of the support hole of the floor hinge body. For this reason, a dustproof material covers the clearance gap produced between a main axis | shaft and a support hole part. When the dustproof material is in strong contact with the main shaft, the dustproof material rotates with the main shaft when the main shaft rotates. If the contact between the dustproof material and the main shaft is weak, the dustproof material will not rotate even if the main shaft rotates.

  In addition, the cap has a mounting hole with a diameter larger than the diameter of the circular section of the main shaft, and the cap does not rotate even if the main shaft rotates. No abnormal noise occurs even when touched. Therefore, the downward cap side portion formed on the cap is in contact with the top portion of the floor hinge body or the container.

  In the invention according to claim 2, since the dustproof material is provided with a through hole portion having a diameter smaller than the diameter of the circular section of the main shaft, and the dustproof material is formed of a material having elasticity, the cross section of the main shaft When the circular portion is inserted into the penetration hole portion, the dustproof material comes into contact with the main shaft. The lower surface of the upper part of the dustproof material contacts the peripheral edge of the support hole of the floor hinge body. Furthermore, the downward dustproof material side part extended in the peripheral part of the dustproof material contacts the side surface of the convex part of a floor hinge main body. For this reason, a dustproof material covers the clearance gap produced between a main axis | shaft and a support hole part. When the dustproof material is in strong contact with the main shaft, the dustproof material rotates with the main shaft when the main shaft rotates. If the contact between the dustproof material and the main shaft is weak, the dustproof material will not rotate even if the main shaft rotates.

  In addition, the cap has a mounting hole with a diameter larger than the diameter of the circular section of the main shaft, and the cap does not rotate even if the main shaft rotates. No abnormal noise occurs even when touched. Therefore, the downward cap side portion formed on the cap is in contact with the top portion of the floor hinge body or the container.

  In the invention according to claim 3, since the dustproof material is provided with a penetration hole portion having a diameter smaller than the diameter of the circular section of the main shaft, and the dustproof material is formed of a material having elasticity, the cross section of the main shaft When the circular portion is inserted into the penetration hole portion, the dustproof material comes into contact with the main shaft. The lower surface of the upper part of the dustproof material contacts the peripheral edge of the support hole of the floor hinge body. Further, the downward dustproof material side portion extending to the periphery of the dustproof material contacts the side surface of the convex portion of the floor hinge body, and the tip portion of the dustproof material side portion is the top portion of the floor hinge body or the housing. Contact the body. For this reason, a dustproof material covers the clearance gap produced between a main axis | shaft and a support hole part. When the dustproof material is in strong contact with the main shaft, the dustproof material rotates with the main shaft when the main shaft rotates. If the contact between the dustproof material and the main shaft is weak, the dustproof material will not rotate even if the main shaft rotates.

  In addition, the cap has a mounting hole with a diameter larger than the diameter of the circular section of the main shaft, and the cap does not rotate even if the main shaft rotates. No abnormal noise occurs even when touched. Therefore, the downward cap side portion formed on the cap is in contact with the top portion of the floor hinge body or the container.

  According to the first to third aspects of the present invention, the dustproof material covers the gap formed between the main shaft and the support hole, and the tip of the downward cap side portion formed on the cap is It contacts the top of the floor hinge body or the container to prevent dust from entering the cap. For this reason, it is possible to prevent dust from entering the gap between the main shaft and the support hole, and to prevent damage to the packing and oil leakage.

  Further, according to the inventions according to claims 1 to 3, since it is only necessary to attach the cap after attaching the dustproof material to the main shaft, the processing of the dustproof material and the cap is easy, and the attachment to the main shaft is also easy. is there. For this reason, the number of processing steps can be reduced, the cost can be reduced, and the floor hinge can be provided at a low cost.

  An embodiment embodying the present invention will be described with reference to FIGS. In the following description, the vertical direction is described as the vertical direction with the floor hinge 1 embedded in the floor of the building.

  First, the floor hinge 1 which concerns on Example 1 of this invention is demonstrated using FIGS. 1-3. As shown in FIG. 1, the floor hinge 1 includes a main shaft 2, a floor hinge body 3, a container 4, a dustproof material 5, and a cap 6. The floor hinge 1 is embedded in the floor of the building and supports a door main body (not shown), and applies a rotational force in the closing direction to the door main body.

  As shown in FIG. 2, the main shaft 2 protrudes from a support hole 33 provided in the floor hinge body 3, is connected to the door main body to support the door main body, and applies a rotational force in the closing direction to the door main body. It is a member to give. The main shaft 2 is rotatably supported by the floor hinge body 3. The section supported by the floor hinge body 3 has a circular cross-sectional shape in a plane perpendicular to the axis. A fitting portion 22 that is fitted to the door main body is provided on the tip end side of the main shaft 2. The cross-sectional shape of the fitting portion 22 is not circular, but the door main body and the main shaft 2 are engaged with each other. A part of the circular section 21 of the main shaft 2 is exposed from the support hole 33 of the floor hinge body 3 described later. The height of the circular section 21 to be exposed is set to such a height that the dustproof material 5 and the cap 6 can be attached.

  As shown in FIG. 2, the floor hinge body 3 rotatably supports the main shaft 2 and applies a rotational force in the door closing direction to the main shaft 2. In the interior of the floor hinge body 3, a structure for applying a rotational force in the door closing direction to the main shaft 2 is provided. Various structures have been conventionally proposed as the structure. However, in the present invention, a conventionally known structure is adopted, and since the structure is not a characteristic part, detailed description and illustration are omitted.

  As shown in FIG. 3, the floor hinge body 3 brings packing or the like into contact with the outer peripheral surface of the main shaft 2. An O-ring 35 as a packing is brought into contact with the outer peripheral surface of the main shaft 2 on the upper side of the bearing 34. A backup ring 36 is provided above the O-ring 35. The backup ring 36 is a ring that assists the O-ring 35. A dust seal 37 is provided above the backup ring 36. The dust seal 37 is a rubber ring that prevents dust from entering. The dust seal 37 is provided with a lip portion on the inner peripheral side, and the lip portion is in contact with the outer peripheral surface of the main shaft 2.

  As shown in FIG. 3, a convex portion 32 projects from the top portion 31 of the floor hinge body 3. The convex portion 32 has a circular shape in plan view. A support hole 33 is provided at the center of the convex portion 32. The support hole 33 is a portion for projecting the main shaft 2 supported by the floor hinge body 3. As shown in FIG. 3, the circular section 21 of the main shaft 2 is exposed from the support hole 33.

  As shown in FIG. 2, the container 4 is a part that houses and fixes the floor hinge body 3 therein. The container 4 has a container main body 41 and a floor plate 42. The container body 41 is open at the top. The container main body 41 is embedded in the floor of the building, and the outer surface is fixed to the building. The floor plate 42 is a member that closes the upper portion of the container main body 41. The floor plate 42 is provided with a protruding hole 43. The protruding hole 43 has a substantially circular shape in plan view. The protrusion 32 and the main shaft 2 of the floor hinge body 3 protrude from the protrusion hole 43.

  As shown in FIG. 3, the dustproof material 5 is a member that is attached to the main shaft 2 and covers a gap generated between the support hole 33 of the floor hinge body 3 and the main shaft 2. The dustproof material 5 is attached to a portion of the circular section 21 of the main shaft 2 exposed from the floor hinge body 3. A nitrile rubber material having a hardness of 90 is used as the material of the dustproof material 5. The dustproof material 5 is provided with a dustproof material upper portion 51. The dustproof material upper portion 51 is substantially circular in plan view. The diameter of the dustproof material upper part 51 is made smaller than the convex part 32 provided in the floor hinge body 3. A penetration hole 53 is provided in the dustproof material upper part 51. The penetration hole 53 has a smaller diameter than the diameter of the circular section 21 of the main shaft 2.

  As shown in FIG. 3, when the dustproof material 5 is attached to the main shaft 2, the circular section 21 of the main shaft 2 is penetrated into the penetration hole 53. The penetration hole 53 has a smaller diameter than the diameter of the circular section 21 of the main shaft 2 and the dustproof material 5 is formed of an elastic material, so that the dustproof material 5 comes into strong contact with the main shaft 2. The dustproof material 5 is attached as much as possible below the main shaft 2, and the lower surface of the dustproof material upper portion 51 is brought into contact with the peripheral edge portion of the support hole 33 of the floor hinge body 3, that is, the upper surface portion of the convex portion 32. Since the dustproof material 5 is in strong contact with the main shaft 2, the dustproof material 5 rotates together with the main shaft 2, and the dustproof material upper portion 51 is in contact with the upper surface of the convex portion 32.

  As shown in FIG. 3, the cap 6 is a member that covers the dustproof material 5 and covers a gap generated between the main shaft 2 and the support hole 33 from above the dustproof material 5. The cap 6 is formed by processing a metal plate. The cap 6 has a cap upper portion 61 and a cap side portion 62. The cap upper portion 61 has a circular shape in plan view. The diameter of the cap upper part 61 is made larger than the diameter of the convex part 32 of the floor hinge body 3. An attachment hole 63 having a diameter slightly larger than the diameter of the circular section 21 of the main shaft 2 is formed in the cap upper portion 61. A downwardly facing cap side portion 62 extends from the periphery of the cap upper portion 61. The height of the cap side portion 62 is a height at which the tip end portion of the cap side portion 62 comes into contact with the floor plate 42 of the container 4 with the cap 6 attached to the main shaft 2. Further, a slight gap is secured between the cap upper portion 61 and the dustproof material 5 so as to be non-contact.

  As shown in FIG. 3, when attaching the cap 6 to the main shaft 2, the circular section 21 of the main shaft 2 is inserted into the mounting hole 63. Since the mounting hole 63 is slightly larger in diameter than the diameter of the circular section 21 of the main shaft 2, the cap 6 is loosely fitted to the main shaft 2. The front end portion of the cap side portion 62 abuts on the floor plate 42 of the container 4. Since the cap 6 is loosely fitted to the main shaft 2, the cap 6 does not rotate even if the main shaft 2 rotates.

  The floor hinge 1 according to the first embodiment has the following effects.

  (1) The dustproof material 5 covers a gap generated between the main shaft 2 and the support hole 33, and the tip of the downward cap side portion 62 formed on the cap 6 abuts against the floor plate 42. This prevents dust from entering the cap 6. For this reason, the penetration | invasion of the dust to the clearance gap between the main axis | shaft 2 and the support hole part 33 can be prevented, and damage, such as packing, and oil leakage can be prevented.

  (2) Since it is only necessary to attach the cap 6 after attaching the dustproof material 5 to the main shaft 2, the processing of the dustproof material 5 and the cap 6 is easy, and attachment to the main shaft 2 is also easy. For this reason, the number of processing steps can be reduced, the cost can be reduced, and the floor hinge 1 can be provided at a low cost.

  (3) Although the tip of the cap side portion 62 is in contact with the upper surface of the floor plate 42, no abnormal noise is generated because the cap 6 does not rotate even when the main shaft 2 rotates.

  (4) Since no gap is generated between the front end portion of the cap side portion 62 and the floor plate 42, the decoration function of the cap 6 is improved and the appearance appearance is improved.

  Next, a floor hinge 1 according to a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the dustproof material side portion 52 formed on the dustproof material 5 is greatly different from the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The dustproof material upper part 51 of the dustproof material 5 is substantially circular in plan view. As shown in FIG. 4, the diameter of the dustproof material upper portion 51 is set to be substantially the same as or slightly smaller than the convex portion 32 provided on the floor hinge body 3. A penetration hole 53 is provided in the dustproof material upper part 51. The penetration hole 53 has a smaller diameter than the diameter of the circular section 21 of the main shaft 2.

  A dustproof material side portion 52 is provided at the peripheral edge of the dustproof material upper portion 51. The height of the dustproof material side portion 52 is shorter than the height of the convex portion 32 of the floor hinge 1. When the dustproof material 5 is attached to the main shaft 2, the dustproof material upper portion 51 is brought into contact with the upper surface of the convex portion 32 of the floor hinge body 3. The dustproof material side portion 52 is in contact with the side surface of the convex portion 32. The dustproof material 5 is rotated together with the main shaft 2.

  The floor hinge 1 according to the second embodiment has the following effects in addition to the effects (1) to (4) of the first embodiment.

  Since the downward dustproof material side portion 52 extended to the peripheral edge of the dustproof material 5 contacts the convex portion 32 of the floor hinge body 3, dust is generated between the dustproof material 5 and the convex portion 32 of the floor hinge body 3. Hard to invade. For this reason, intrusion of dust can be prevented.

  Next, a floor hinge 1 according to Embodiment 3 of the present invention will be described with reference to FIG. In the third embodiment, the dustproof material side portion 52 formed on the dustproof material 5 is greatly different from the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The dustproof material upper part 51 of the dustproof material 5 is substantially circular in plan view. As shown in FIG. 5, the diameter of the dustproof material upper portion 51 is set to be substantially the same as or slightly smaller than the convex portion 32 provided on the floor hinge body 3. A penetration hole 53 is provided in the dustproof material upper part 51. The penetration hole 53 has a smaller diameter than the diameter of the circular section 21 of the main shaft 2.

  A dustproof material side portion 52 is provided at the peripheral edge of the dustproof material upper portion 51. The height of the dustproof material side portion 52 is set to a height at which the lower end portion of the dustproof material side portion 52 contacts the top portion 31 of the floor hinge body 3 when the dustproof material 5 is attached to the main shaft 2. The dustproof material side portion 52 is also in contact with the side surface of the convex portion 32. The dustproof material 5 is rotated together with the main shaft 2.

  The floor hinge 1 according to the third embodiment has the following effects in addition to the effects (1) to (4) of the first embodiment.

  The downward dustproof material side portion 52 extended to the peripheral edge of the dustproof material 5 contacts the side surface of the convex portion 32 of the floor hinge body 3, and the dustproof material side portion 52 is the top portion 31 of the floor hinge body 3, or Since it contacts the container 4, it is difficult for dust to enter between the dustproof material 5 and the convex portion 32 of the floor hinge body 3. For this reason, intrusion of dust is prevented.

  In addition, embodiment is not limited above, For example, you may change as follows.

  The contact between the main shaft 2 and the dustproof material 5 is not limited to the strong contact, but may be weakly contacted after securing the contact state. Depending on the strength of the contact, the dustproof material 5 may be rotated together with the rotation of the main shaft 2, or the dustproof material 5 may not be rotated. The state of contact between the dustproof material 5 and the main shaft 2 can be changed by changing the diameter of the penetration hole 53 provided in the dustproof material 5 or by changing the material forming the dustproof material 5.

  The contact between the dustproof material side portion 52 and the side surface of the convex portion 32 may be either strong or weak, or may be non-contact. The state of contact between the dustproof material 5 and the main shaft 2 can be changed by changing the diameter of the dustproof material upper portion 51, changing the material forming the dustproof material 5, or the like. When the dustproof material side portion 52 and the side surface of the convex portion 32 are not in contact with each other, the dustproof material upper portion 51 has at least the effect of the first embodiment.

  The dustproof material 5 is a nitrile rubber material having a hardness of 90, but is not limited to this. It is possible to use a rubber-based material or a resin-based material having chemical resistance against an acidic or alkaline floor cleaning agent or the like and having weather resistance and flexibility.

  The cap 6 may be brought into contact with the top portion 31 of the floor hinge body 3 without bringing the tip end portion of the cap side portion 62 into contact with the floor plate 42 of the container 4.

  The cap 6 is configured such that the front end portion of the cap side portion 62 is brought into contact with the floor plate 42 of the container 4 or the top portion 31 of the floor hinge body 3, and the height of the cap side portion 62 is lowered to 61 may be brought into contact with the dustproof material 5, or the height of the cap side portion 62 may be increased so that the cap upper portion 61 is not in contact with the dustproof material 5. When the cap upper portion 61 is brought into contact with the dustproof material 5, the cap 6 is prevented from rotating together with the main shaft 2.

1 is a simplified perspective view of a floor hinge 1 according to Embodiment 1. FIG. 1 is a simplified side view of a part of a floor hinge 1 according to a first embodiment. It is the side surface enlarged view which fractured | ruptured some floor hinges 1 concerning Example 1. FIG. It is the side surface enlarged view which fractured | ruptured a part of floor hinge 1 which concerns on Example 2. FIG. It is the side surface enlarged view which fractured | ruptured a part of floor hinge 1 which concerns on Example 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor hinge 2 Main axis | shaft 21 Circular section 22 of main axis Fitting part 3 Floor hinge main body 31 Top part 32 Convex part 33 Support hole part 34 Bearing 35 O ring 36 as a packing 36 Backup ring 37 Dust seal 4 Container 41 Main body 42 Floor plate 43 Protruding hole 5 Dustproof material 51 Dustproof material upper part 52 Dustproof material side part 53 Penetration hole part 6 Cap 61 Cap upper part 62 Cap side part 63 Mounting hole part

Claims (3)

A main shaft that is connected to the door main body and applies a rotational force in the closing direction to the door main body;
The main shaft is rotatably supported by bringing packing or the like into contact with the outer peripheral surface of the main shaft, and a rotational force in the door closing direction is applied to the main shaft, and from a support hole provided in a convex portion protruding from the top. A floor hinge body for projecting the main shaft so as to expose a circular section of the main shaft;
A housing for housing the floor hinge body and projecting the main shaft from the projecting hole;
It is formed of a material having elasticity, and has a dustproof material upper portion provided with a penetrating hole portion having a diameter smaller than the diameter of the cross-sectional circular portion of the main shaft, and the circular cross-sectional portion of the main shaft is penetrated into the penetrating hole portion, And the dustproof material attached to the main shaft so that the lower surface of the upper part of the dustproof material is in contact with the peripheral edge of the support hole of the floor hinge body,
The upper part of the cap has a cap upper part provided with a mounting hole having a diameter larger than the diameter of the circular section of the main shaft, and the circular section of the main shaft to which the dustproof material is attached penetrates into the mounting hole. A cap in which the tip part of the downward cap side part extending to the peripheral part of the floor is in contact with the top part of the floor hinge body, or the container,
The floor hinge characterized by having.   2. The floor hinge according to claim 1, wherein a dust-proof material side portion extending downward is provided at a peripheral portion of the dust-proof material, and the dust-proof material side portion is brought into contact with a side surface of a convex portion of the floor hinge body so that the dust-proof material serves as a main axis. A floor hinge that is attached. 2. The floor hinge according to claim 1, wherein a dust-proof material side portion extending downward is provided at a peripheral edge portion of the dust-proof material, the dust-proof material side portion is brought into contact with a side surface of a convex portion of the floor hinge body, and the dust-proof material side A floor hinge characterized in that a dust-proof material is attached to the main shaft by bringing the tip of the portion into contact with the top of the floor hinge body or the container.

Images