TW201333320A - Clamp fitting - Google Patents

Abstract

The invention relates to a terminal fitting, in particular for glass doors, with a first and a second clamping plate (2, 3) holding a door leaf (4) in the region of a front edge of clamping, characterized in that the clamping plates (2, 3) made of a plastic made with a modulus of elasticity of at least 10000 N/mm2.

Description

Clamping accessories

The present invention relates to a clamping fitting, particularly for a glass door, having a first and a second clamping plate that clamps a leaf leaf in a front end region.

For the door, in particular the glass door, the clamping fitting has a clamping plate of two-aluminum, stainless steel or brass. In order to allow the clamping plate to clamp the glass in a non-damaging manner, an intermediate layer made of plastic material or cardboard is placed between the clamping plate and the glass. This avoids direct contact between the metal and the glass door. A metal insert, a so-called load-bearing bridge, is attached to the clamping plate for connection to, for example, a floor door closer or a rotary hinge. The installation of the clamping fittings is extremely complicated, since the intermediate layer must be precisely positioned. In addition, the weight of the fitting is very large due to the metal clamping plate.

It is an object of the invention to provide a clamping fitting for a door, in particular a glass door, which is easy to install and can be manufactured at low cost.

The present invention achieves the set objectives via the teachings of claim 1 of the patent application; the remaining advantageous embodiments of the invention are disclosed in the appended claims.

According to the technical teaching of the first paragraph of the patent application, the clamping plate is made of plastic, so that the intermediate layer can be omitted. Installation is therefore simpler and faster, and the accessories are lighter. The clamping plates can be screwed directly to the clamping glass without the need for an intermediate layer - to avoid breaking the glass due to incorrect installation of the intermediate layer.

The invention is based on the recognition that the material used in the clamping plate, such as plastic, is too low in strength to cause a loss of clamping force sooner or later. Since the glass plate is held by adhesion, when the E-modulus of the material used is too small, the pre-force of the screw may cause deformation of the clamping plate. The minimum E-mode value was verified to be at least 10,000 N/mm ² . This E-modulus can be achieved, for example, by reinforced plastic or by composite materials.

As the reinforced plastic, for example, glass, carbon, aromatic polyamine, or calcium silicate (Wollastonit) can be used for fiber reinforcement. It has properties such as enhanced tensile strength and/or flexural strength. An example of a suitable material is a glass filament having an E-modulus of about 70,000 N/mm ² which is machined into a mat or a composite and can be processed into a clamping plate.

By composite material is meant a mixture of materials whose properties are modified for an application. In particular, the use of a material having a flat structure, such as Talkum or Glimmer, can significantly increase the E-modulus.

Common plastic materials with a lower E-modulus may cause the clamping seam to crack, which occurs relatively quickly at high temperatures or humidity. Thus the door suddenly and without warning is sunk by the fitting and sometimes breaks the glass. In extreme cases, inexpensive plastic materials with low E-modulus are severely deformed when the screws are locked, so that the clamping plates are not in planar contact during installation, but only in the screw area. Due to the latent change of the plastic material, the clamping force of the point contact will also rapidly decrease, and the clamping fitting will fail, which may damage the glass door.

Metal reinforcement is placed in the area of the screw in the plastic clamping plate, resulting in another improvement. This can be implemented as a threaded sleeve or as a widened screw head bearing surface. Although it creates a rigid step in the metal to plastic material transition zone, it does not cause severe stress concentrations. This material failure failure is primarily determined by the ageing extension of the material placed in the plastic material.

In a preferred embodiment, a plastic material having at least one core is used, and the core or the plurality of cores are disposed in the screw bearing area. Unlike the conventional sandwich core, the sandwich core has a greater density and strength than the surface layer, and the surface layer is also made of a plastic material.

The present invention produces a clamping fitting for, for example, an all-glass device, a pendulum door and a swing door, or a horizontal sliding wall that is extremely light and simple to install.

1‧‧‧Clamping accessories

2‧‧‧ clamping plate

3‧‧‧ clamping plate

4‧‧‧ Door leaves

5‧‧‧ hollow

6‧‧‧ hollow

7‧‧‧ deep concave

8‧‧‧ bumps

9‧‧‧ gap

10‧‧‧ contour

11‧‧‧First screw

12‧‧‧through holes

12a‧‧‧ Ring

13‧‧‧Second screw

14‧‧‧through holes

15‧‧‧ screws

16‧‧‧through holes

17‧‧‧ Strengthening

18‧‧‧ Strengthening

19‧‧‧ Strengthening

20‧‧‧Inclusions

21‧‧‧Inclusions

The invention will be described in detail below based on the illustrated embodiments. The figure shows: Figure 1: an exploded view of a clamping fitting, Figure 2: Mounting on a rotor door, Figure 3: Clamping fitting after installation.

The clamping fitting 1 comprises a bearing bridge (not shown) which is fixed between a first clamping plate 2 and a second clamping plate 3. The clamping plates 2, 3 each have a recess 5, 6 which accommodates the load-bearing bridge. A recess 7 is additionally formed on the clamping plate 3, corresponding to a projection 8 of the clamping plate 2. The recess 7 and the projection 8 on the one hand align the mounted clamping fittings 1 to one another but also clamp the bearing bridge (not shown). For this purpose, an arcuate notch 9 is formed in the door leaf 4 as a so-called universal cutout. The clamping plates 2, 3 clamp the leaflets 4 in the edge regions of the indentations 9, but also at the same time in the edge regions of the indentations 9. Therefore, it can be seen that the bearing bridge (not shown) is disposed on the plane of the door leaf. One of the clamping plates 2, 3, here the clamping plate 3, has an arcuate profile 10 on the inside, which corresponds exactly to the notch of the door leaf 4, making the mounting and alignment of the clamping fitting 1 easy.

The first clamping plate 2 is mounted on the first side of the door leaf 4 and the second clamping plate 3 is mounted on the second side of the door leaf 4. The two clamping plates 2, 3 cover one part of the door leaf 4 and all of the load bearing bridge.

The other components of the clamping fitting 1 are a first screw 11 , a through hole 12 in the door leaf 4 , and a second screw 13 in the second through hole 14 of the clamping plate 2 . The clamping force required is provided to secure the clamping plates 2, 3 to the door leaf 4. In order to prevent the screw 15 from contacting the glass door leaf 4, a plastic ring 12a is placed in the middle.

In order to fix the bearing bridge to the door leaf 4, another screw 15 is inserted via the other through hole 16 in the clamping plate 2. This screw 15 is engaged in the load-bearing bridge, which is additionally clamped by the recess 7 and the projection 8.

The clamping plate may be constructed of a high strength plastic material, a plastic material reinforced with, for example, glass fibers, or a so-called composite material. It in any case has an E-modulus of at least 10,000 N/mm ² . Inside the clamping plate, for example, metal reinforcements 17, 18, 19 may be provided in the regions of the through holes 12, 14 and 16. These reinforcements 17, 18, 19 are preferably placed at least partially into the material of the clamping plates 2, 3 as the placement plates, and the squats are subjected to the surface pressure of the screws 11, 13, 15 and can direct the pressure to a large area. Furthermore, the inserts 20, 21 are inserted into the clamping plates 2, 3 in a so-called threaded sleeve, into which the screws 11 and 13 are engaged.

1‧‧‧Clamping accessories

2‧‧‧ clamping plate

3‧‧‧ clamping plate

5‧‧‧ hollow

6‧‧‧ hollow

7‧‧‧ deep concave

8‧‧‧ bumps

10‧‧‧ contour

11‧‧‧First screw

12a‧‧‧ Ring

13‧‧‧Second screw

14‧‧‧through holes

15‧‧‧ screws

16‧‧‧through holes

17‧‧‧ Strengthening

18‧‧‧ Strengthening

19‧‧‧ Strengthening

20‧‧‧Inclusions

21‧‧‧Inclusions

Claims (6)

A clamping fitting, in particular for a glass door, having a first and a second clamping plate (2, 3), the clamping plates holding a leaf (4) clamped in a front end region, characterized The clamping plates (2, 3) consist of a plastic material having an E-modulus of at least 10,000 N/mm ² . The clamping fitting according to item 1 of the patent application, characterized in that the plastic material has a reinforcement, in particular a fiber reinforcement. The clamping fitting according to the first aspect of the invention is characterized in that the plastic material is composed of a composite material, and the base material is mixed with the plate-like structure. A clamping fitting according to any of the preceding claims, characterized in that the clamping plates (2, 3) have reinforcement (17, 18, 19) in the region of the screws (11, 13, 15) as screws The bearing surface. A clamping fitting according to any of the preceding claims, characterized in that the clamping plates (2, 3) have a reinforcement in the form of a threaded sleeve (20, 21), the screws (11, 13, 15) Into it. The clamping fitting according to the first aspect of the patent application, characterized in that the clamping plates (2, 3) have a sandwich structure, and the sandwich core has a higher density and strength than the peripheral plastic material.