HK1098182A1 - Rapid hinges - Google Patents

Abstract

A concealed pivot door hinge comprising: a reinforcing strap built into the door, a pin attached to a metal flange for attachment to the floor below the door or to the door frame above the door, and a pin receiver attached to a flange and mounted on the door, optionally fixed to the strap.

Description

Fast-assembling hinge

Technical Field

The present invention relates to door hinges and in particular, but not exclusively, to hinges which are of aesthetic quality and which can be easily and quickly installed.

Background

Traditionally, doors are field mounted using butt hinges or pivot hinges (see fig. 1).

These hinges need to be slotted and joggled into wooden doors or recessed into metal doors with a stiffener plate. If this work is done at the factory, as is usual, the hinges face problems of alignment, trimming, cutting doors, changes in the relative position of the hinges, due to differences in the different positions and floor to ceiling heights of the premises.

Another option is to customize the hinge on site, but because of current hinge designs, more carpentry and metalworking operations are required to install the hinge into the door. This is one of the main reasons for the excessive time and labor required to install the door hinge.

Finally, the joints of the hinges are visibly exposed when the door is closed, and the hinge plate is exposed when the door is opened.

Disclosure of Invention

The door is connected to the doorframe by a hinge. The hinge is mounted to one side (hinge side) of the door. The door swings on a hinge.

The object of the present invention is to hide the entire hinge system within the door and doorframe, while allowing the door to move away from the doorframe as it moves through its swing path. For the purpose of moving away from the door frame, a specific pivot point (pivot axis) must be found on the door. Next, when the door is opened and closed with the pivot hinge, the door will rotate on the pivot point.

In general, there are two types of pivot hinges: offset pivot hinges and centered pivot hinges (see fig. 2A and 2B).

The offset pivot hinge is used for one-way doors (single action doors) where the pivot hinge is mounted in the general manner shown in fig. 2A. Thus, when the door is closed, they are visible because the pivot point is outside the door.

A centered pivot hinge is used for bi-directional doors (double acting doors) where the pivot hinge is mounted in the general manner shown in fig. 2B. The hinge is hidden within the door, but requires that both edges of the door be rounded/chamfered so that they will move away from (without contacting) the door frame as the door moves through its swing path. The pivot point is located along the center of the door thickness. The present invention uses a new pivot point that is neither centered nor offset. Instead, it is a pivoting hinge in which the corner of the door leaves the door frame without contacting the door frame, while keeping the pivot point positioned within the door, thereby hiding it. The implicit pivot point can be located by computer aided design with a 3mm gap (tolerance) between the two corners a and B of the door edge and the frame with the 20mm frame slot.

The shaded areas shown in figures 2c (i) to (vii) are areas where pivot points may be placed to achieve the above described effect. Any point selected within this area will allow the door edge to move through the swing path without contacting the doorframe. In this regard, it is to be satisfied that:

(1) the thickness of the door is 35mm to 60 mm.

(2) There is a minimum of 3mm clearance/tolerance between the door and the doorframe, both for the door surface and the door edge.

(3) The depth of the frame groove is 20 mm.

The selection of the location of the pivot point within the shaded area is influenced by several factors.

(1) If the pivot point is offset away from the door edge (a-B, hinge side), this will correspondingly reduce the net open space, i.e., the space required for user ingress and egress (see fig. 2D).

(2) If the pivot point is offset close to the door surface, it is desirable that the door be made of a stronger material so that a thinner pin/shaft can be used to support a 50-60kg door, since it must be considered that the pin or shaft has a radius of only 5 mm. This means that the thickness from the door surface to the shaft is only 5 mm.

(3) If the pivot point is offset near corner "a" of the door, a stronger strap and reinforcement is required to support the weight of the door and offset the moment of rotation.

Most pivot hinges include apertured liners that are slotted/fitted into the top and bottom of the door (see fig. 3). The function of this welt is:

(i) a reinforcement as a pivot point;

(ii) as a "datum" to locate the pivot point;

(iii) distributing the force along the backing.

In this case, the thickness of the lining for heavy doors is 3-15mm, which is a large dimension for field grooving.

To avoid field grooving all removal of wood/material can be done with the drill only-i.e. drilling only a round hole.

The present invention is a complete change to the conventional manner in which the door is processed in the field to be mounted to the doorframe.

The quick-assembly hinge comprises three parts:

1) lining plate

Unlike conventional liners, which are thicker (3-15mm) and require grooving, the design of the present invention uses liners having a thickness of 1.5-8mm, but wider. The liner panels are placed within the door along the top and bottom corners of the door during the door manufacturing process and are glued, threaded, nailed or sandwiched between the stiles (rails) and rails (rails).

The liner is widened so as to be easily positioned, and the weight of the door can be dispersed over a wider area, and thus the force acting on the hinge and the door can be reduced.

For hollow doors, additional blocks may be used to reinforce the liner panels (see fig. 4).

Furthermore, the liner may be provided with perforations, corrugations, screens to facilitate bonding/adhesion to the wood/composite door. For certain paneled (panelized) door designs, the liner panel may be bent into an "L" shape or formed into a "U" shape (see fig. 4A).

Since the various components are designed to be drilled or surface mounted, the liner plays an important role in several respects:

(1) positioning the position of a receiver (receiver);

(2) maintaining a precise height;

(3) load at the dispersed pivot point/support along the door panel.

The liner is a metal reinforcing plate having a thickness of 1-3mm and is embedded in the door panel during the manufacturing process of the door. Each panel is positioned between the door core (if a fire door) and the inside banding (see fig. 4), with one panel at the top and one panel at the bottom. For hollow doors, grooves may be made in the edge banding or additional wood may be used to hold the liner in place.

2) Pin/shaft

The pin/axle is the component on which the door pivots and is preferably made of a non-corrosive material such as stainless steel. The preferred diameter is 5-14mm depending on the frequency of use of the door, the width and weight of the door. The shaft is preferably hardened and ball bearings (ball bearings) are used at the bottom to reduce friction. For a lightweight door (30-50kg), the entire weight can be carried by the pin.

The pin must be mounted on a metal flange to allow the pin to be secured to the door and doorframe. Various types/configurations may be used (see fig. 5). It is preferable to have the pin fixed to the flange and vary the height by means of shims. Alternatively, the pin may be raised/lowered relative to the flange by screws/nuts or other means.

3) Receiver-plate/flange or bucket/disc form

The pin is placed in a sleeve called a receiver. The receiver is mounted opposite the pin/shaft. For example, if the pin/axle is mounted on the door frame, the receiver will be mounted on the door and vice versa.

The receiver is mounted on the flange to allow the receiver to be secured to a door or floor/doorframe. The flange is preferably made of stainless steel since it is visible, and the thickness of the various flange elements is 2-9 mm. The flanges may have unequal thicknesses, e.g., thin at the top and thick at the bottom. This is due to the fact that at the bottom more weight is carried than at the top, and at the top more is the guide around which the door pivots. The door to floor clearance may be 10mm and the door to door frame clearance at the top may be 3-5 mm. These flanges should be surfaces to be mounted to avoid grooving. For heavier doors, the sleeve will be enlarged into a disc, as shown in fig. 6.

Such a disc/drum may be rotated to allow adjustment of the pivot point and have holes to secure the disc to the liner (note that the liner has been pre-installed in the door). In this construction, the pin is made shorter so as to be used only as a guide for pivoting about it, the weight of the door being borne by the disc which has a larger area. Such a disc/bucket can be raised or lowered. The size and shape of the liner, pin and receiver may vary depending on the weight of the door. Some variations of these components are shown in fig. 4. The pin may be mounted to the door frame or to the door with the receiver mounted in an opposed position.

The pin and receiver may be mounted on the door and the door frame/floor respectively for all pivot points and vice versa.

The door edge strip has a fixed thickness, generally equal to the size of the receiving member. The flange/plate receiver can be machined with welded guides. In this regard, the guide may have a sleeve and a bearing or a sintered bearing for reducing friction. Such a disc/bucket may also have a sleeve with bearings that line the holes.

The installation method comprises the following steps:

1) the pin is fixed to the door/doorframe by screwing/bolting.

2) The receiver is placed inside the door (top and bottom).

3) The door panel is carried on a pin provided on the floor and is placed in position.

4) The pin for the top is put into the receiving member for the door in a state that the top of the door can be accessed by tilting out from the door frame.

5) The door is then opened until the flange with holes for screws is exposed and the top pin is screwed into place.

For doors with weights up to 50-60kg, the pin can carry the weight of the door as the diameter of the pin can be 6-14mm and does not affect the door surface because the pivot point is close to the door surface and a thicker pin would reduce the remaining space.

For heavier doors, a bucket/disc is used and then the weight will be spread along the width of the bucket. The pin then serves only as a guide. The barrel/disc may be rotated within its center to make any necessary adjustments during installation. This will move the position of the hole of the receiving member to allow adjustment in the left/right or front/back position.

For height adjustment, the ground pin may have a washer or washer to raise the bucket/disc. The disc/bucket may also be configured to extend further to take up the tolerance between the door and the frame by adding shims between the liner and the bucket/disc.

Since this is a pivoting hinge system, a shear pin may be used if necessary, as in other common practices.

Claims (8)

1. A hidden pivot hinge comprising:

a door having a thickness of 35mm to 60 mm; there is a minimum 3mm gap or tolerance between the door and the doorframe, both for the door surface and the door edge;

the door includes liner panels that are placed into the door along the top and bottom corners of the door during the door manufacturing process and are glued, threaded, clinched or sandwiched between the stiles and rails;

a pin or axle mounted on a metal flange so as to be fixed to the ground in a bottom position and to a door frame in a top position, the pin or axle being the part on which the door pivots;

a receiver mounted on a flange to be secured to a door or to a floor or door frame, the receiver being mounted opposite the pin or shaft;

wherein the corner of the door leaves the door frame without contacting the door frame while maintaining the pivot point positioned within the door, thereby concealing the pivot point.

2. The hidden pivot hinge of claim 1, wherein the pivot hinge is pre-installed in a door without requiring field grooving.

3. The hidden pivot hinge according to claim 1, wherein the pivot hinge is reinforced by fixing the pin or shaft and receiver to a liner plate to carry the weight of the door.

4. The hidden pivot hinge according to any of claims 1 to 3, characterized in that the backing plate is provided with perforations, corrugations, a wire mesh to facilitate bonding or adhesion to wooden or composite doors.

5. A hidden pivot hinge as claimed in any one of claims 1 to 3, characterised in that the shaft is hardened and ball bearings are used at the bottom to reduce friction.

6. The hidden pivot hinge of claim 1, wherein the pin is fixed to the metal flange and changes height by a shim.

7. The hidden pivot hinge according to claim 1, characterized in that the pin is raised or lowered with respect to the metal flange by means of a screw or a nut.

8. The hidden pivot hinge according to any one of claims 1 to 3, characterized in that the door is a hollow door.