CN102947603A - Fitting and lightweight panel - Google Patents

Abstract

The present invention relates to an accessory (1), particularly for installation in a lightweight structural panel, the accessory having a body (2, 2') in which at least one adhesive cavity (4) is formed, an adhesive channel (3, 3') preferably opening into the adhesive cavity, the adhesive cavity (4) being designed to be at least partially open for bonding with surrounding components, wherein at least one device (7, 8; 7', 8', 51, 60) is provided on the adhesive cavity (4) and/or in the adhesive channel (3, 3') to prevent backflow of adhesive (13) after filling the adhesive cavity (4).

Description

Fittings and lightweight construction panels

technical field

The invention relates to an accessory, in particular an accessory for installation in a lightweight construction panel, said accessory having a body in which at least one adhesive cavity is formed, an adhesive channel preferably opening into said adhesive An adhesive cavity, the adhesive cavity is configured to be at least partially open for bonding with surrounding components.

Background technique

DE 10 2009 005 596 discloses a furniture fitting for lightweight construction panels, in which a plurality of injection openings is provided through which adhesive is injected and which is dispensed via adhesive channels. The adhesive channel is designed to be open, so that the adhesive can adhere to the cover plate. A disadvantage of such an adhesive supply configuration is that the adhesive can flow back after injection, so that visually unattractive deposits can form on the opening for the adhesive nozzle. Furthermore, the height of the adhesive in the adhesive cavity may be reduced so that only a portion of the surface above the adhesive cavity is bonded to the surrounding components. This can lead to a weakening of the bond.

Contents of the invention

It is therefore the object of the present invention to provide a fitting which can be glued to surrounding elements in a simple manner and which enables a precise metering of the adhesive.

This object is achieved by an accessory having the features of claim 1 .

According to the invention, the adhesive is filled, in particular via an adhesive channel in which or on the adhesive cavity there is provided a means to prevent the adhesive from flowing back after filling the adhesive cavity. device. As a result, the adhesive can be dosed precisely, since the adhesive is injected into the adhesive channel and the adhesive chamber without a definable portion of the adhesive subsequently flowing out again. The device then automatically closes the adhesive channel and thus prevents the adhesive from escaping.

The device is, for example, in the form of a valve, which preferably includes a movably mounted closure element. This makes it possible to separate the filling channel from the adhesive channel in a simple manner.

In order to avoid leakage losses, an inwardly directed annular projection is preferably provided in the adhesive channel, against which a tubular injection needle for the adhesive can rest. Here, the injection needle can rest with its end side against the annular projection, so that the adhesive is injected substantially completely into the adhesive channel. The annular projection can here be conical or trapezoidal in cross section, so that the abutment surface for the injection needle is arranged obliquely with respect to the end surface of the injection needle, so that a good seal is ensured. Here, the closure element can bear against the side of the annular projection facing the adhesive chamber, so that the valve is designed to be particularly compact.

The closure element is formed, for example, as a ball which is movable in the adhesive channel in the cage. Alternatively, the closure element can also be designed as a pivotable flap, wherein the flap is preferably formed in one piece with the main body and mounted pivotably, for example via a film hinge. The closure element can here be pretensioned into the closed position by a spring. The fitting according to the invention is arranged, in particular at the end side, on a lightweight construction panel having two cover panels and an intermediate layer arranged between the two cover panels. For this purpose, the fitting preferably has adhesive chambers on opposite sides, at least one adhesive chamber being bonded to one of the cover plates in each case.

）或蜂窝板中那样。此外，在中间层和盖板之间密度是变化的，以便获得一种轻质结构板。也可以设想，中间层构造成泡沫，如例如在泡沫芯板中那样。此外也可以设想在刨花板的中间层的复合体中加入密度较小的材料，例如聚苯乙烯泡沫。此外可以设想，为了提高稳定性，附加地向复合材料中加入另外的与盖板的物理和/或化学特性相同的中间板。前面所述的结构形式只应作为例子理解，并且并不构成形成轻质结构板的所有变型方案的穷举。轻质结构板的盖板优选设计成能够承受拉力载荷，而中间层能够承受压力载荷。另一种设想可以基于一种双T字梁实现，如由机械制造已知的那样。轻质结构板的中间层根据这种设想对于轻质结构板的阻力矩所起的作用比盖板小。在边缘侧轻质结构板通常设有边缘条，这些边缘条总体上如框架那样在它们之间包围轻质结构板的基面。In lightweight construction panels, the intermediate layer usually differs from the cover sheet in its chemical and/or physical properties. The intermediate layer is usually provided with cavities or made of a readily permeable material. Lightweight construction panels are known in which the middle layer consists of light wood, such as balsa. Lightweight construction panels are also known in which the middle layer consists of fiber material, for example hemp fibers or straw fibers. Furthermore cavities can also be made in the intermediate layer, as for example in extruded tubular particleboard (

) or as in honeycomb panels. Furthermore, the density is varied between the intermediate layer and the cover in order to obtain a lightweight structural panel. It is also conceivable for the intermediate layer to be formed as foam, as for example in a foam core. Furthermore, it is also conceivable to add a less dense material, such as polystyrene foam, to the composite of the particleboard middle layer. It is also conceivable to additionally add further intermediate sheets having the same physical and/or chemical properties as the cover sheet to the composite material in order to increase the stability. The constructions described above are to be understood only as examples and do not constitute an exhaustive list of all variants for forming lightweight panels. The cover plate of the lightweight construction panel is preferably designed to be able to withstand tensile loads, while the intermediate layer is able to withstand compressive loads. Another concept can be realized based on a double T-beam, as is known from mechanical engineering. According to this concept, the middle layer of the lightweight construction panel has a smaller effect on the moment of resistance of the lightweight construction panel than the cover sheet. On the edge sides the lightweight construction panel is usually provided with edge strips which enclose the base area of the lightweight construction panel between them generally like a frame.

Description of drawings

The present invention will be described in detail below based on six embodiments. in:

1 to 4 show several views of a first embodiment of the fitting according to the invention during bonding;

5 to 8 show several views of a second embodiment of the fitting according to the invention during bonding;

Figure 9 shows a top view of the adhesive chamber of one of the fittings;

FIG. 10 shows a perspective view of a lightweight construction panel with fittings fastened at the end sides;

11 to 13 show various views of a third embodiment of the fitting according to the invention during bonding;

Figure 14 shows a view of a fourth embodiment of an accessory according to the invention;

Figure 15 shows a view of a fifth embodiment of an accessory according to the invention; and

Figure 16 shows a view of a sixth embodiment of an accessory according to the invention.

Detailed ways

The fitting 1 comprises a main body 2 , in particular made of plastic, which has an adhesive channel 3 which is open at one end. The cylindrical adhesive channel 3 opens into an adhesive chamber 4 which is arranged on the outside of the main body 2 and is delimited at the end by side walls 40 and 41 . Furthermore, wall elements 42 are provided on the longitudinal sides, on which grooves 43 or grooves are provided.

The fitting 1 is used to fasten another component and for this purpose comprises a coupling part 20 in the form of an eccentric which is in connection with the insertion channel 21 on the periphery. A pin 24 can be inserted through the insertion channel 21 , which is now tensioned by the coupling part 20 . For this purpose, an axial channel 22 is provided through which a tool can engage the coupling part 20 with a tool plug 23 . However, it is also possible to provide completely different couplings and fastenings for the components on the fitting 1 .

In the adhesive channel 3 there is an annular projection 5 , which is directed inwardly and tapers gradually, forming an inclined contact surface 6 on the open side of the adhesive channel 3 . On the opposite side, a valve surface 7 is formed on the projection 5 , against which a closing element 8 in the form of a ball can rest. The ball 8 is held movably in the cavity and can move away from the contact surface 7 towards the support surface formed by the protruding rib 19 . The ribs 19 prevent the closing element 8 from abutting against the conical annular surface 9 and closing off the adhesive channel 3 .

The fitting 1 is shown in FIG. 1 before installation. In this case, the fitting 1 can be embedded in the lightweight construction panel, wherein on the opposite sides of the fitting, adhesive pockets 4 are formed, which are bonded to a cover of the lightweight construction panel. For bonding the fitting 1 , an injection device 10 is provided with a tubular injection needle 11 in which an injection channel 12 is formed.

For gluing, the injection needle 11 is inserted into the adhesive channel 3 until one end of the injection needle 11 bears against the contact surface 6 of the projection 5 ( FIG. 2 ). Then inject adhesive 13, at this moment, closing element 8 is pressed to stop 9, and adhesive flows in the part behind adhesive channel and flows into adhesive chamber 4, until adhesive chamber is filled and The adhesive adheres to the surrounding components.

To end the gluing, the injection needle 11 is withdrawn from the adhesive channel ( FIG. 4 ), wherein the closure element 8 is now pushed by the adhesive 13 in the opening direction of the adhesive channel 3 and rests against the protrusion 5 . on the abutment surface 7 and thus provide a seal. It is also possible to prestress the ball 8 against the contact surface 7 in the closing direction.

Modified embodiments of the fitting 1 ′ are shown in FIGS. 5 to 8 , wherein identical components bear the same reference numerals. The fitting 1' comprises a main body 2' made of plastic, which on opposite sides each has an adhesive channel 3' which leads into an adhesive chamber 4 which is open to the outside. A valve is arranged in the adhesive channel 3 ′, which is formed by an annular projection 5 ′ and a pivotable flap 8 ′. For gluing, first an injection needle 11 is introduced into each adhesive channel 3', which abuts on the end side on the annular protrusion 5' of the adhesive channel 11, so that the injection needle 11 Sealing is achieved in the end-side area of the seal (fig. 6). Then inject adhesive, thus the rotatable valve 8' is opened, and the adhesive can flow into the rear part of the adhesive passage 3' and can flow into the adhesive cavity 4 until it is filled with adhesive 13 for bonding. Agent chamber 4 (Fig. 7).

After filling with adhesive, the pivotable flap 8 ′ is closed, wherein the flap 8 ′ bears against the contact surface 7 ′ of the annular projection 5 ′ and thus achieves a seal.

FIG. 9 shows a plan view of the adhesive chamber 4 of the fitting 1 or 1 ′. The adhesive chamber 4 is designed as an elongated cavity which is delimited at each end by side walls 40 and 41 and is surrounded on the longitudinal sides by side walls 42 . The side walls 42 can here be rounded, so that the fitting 1 can be inserted into a circular hole in a lightweight construction panel.

In FIG. 10 the fitting 1 or 1 ′ is mounted in a lightweight construction panel 30 . The lightweight construction panel 30 comprises two outer cover panels 31 , between which an intermediate layer 32 of lightweight material is arranged. A circular hole is formed on one end face 33 , into which the fitting 1 or 1 ′ is inserted such that the adhesive chamber 4 is each open towards a cover plate 31 . The fitting 1 or 1 ′ is thus bonded to the two cover plates 31 of the lightweight construction panel 20 . Furthermore, pins 24 are shown, which serve to connect two plate-shaped elements. For this purpose, the pin 24 can be inserted into the insertion channel 21 and can be held by the coupling piece 20 in order to form the connection.

FIG. 11 shows a modified embodiment of a fitting 1 ″, in which, in contrast to the first exemplary embodiment, two parallel passage sections 35 and 38 leading to the adhesive chamber 4 are formed from chambers with closing elements. The shorter channel section 38 here has a larger diameter than the longer channel section 35 which extends from the opening 36 of the chamber with the closing element 8 to the opening 37 in the adhesive chamber 4 .

At the start of the injection process, the closure element 8 presses against the end of the chamber and thus substantially closes the channel section 38 , as shown in FIG. 12 . Adhesive thus flows from the injection needle 11 at least mainly through the second channel section 35 into the adhesive chamber 4 . If the supply of adhesive is stopped, the adhesive from the adhesive chamber 4 is pressed against the closing element 8 , which now moves towards the valve surface 7 and closes the adhesive channel 3 there. The larger cross-sectional area of the channel section 38 ensures that the adhesive finds the path of least resistance and moves the closing element 8 into the closed position ( FIG. 13 ).

FIG. 14 shows another embodiment of a fitting 1'", in which the adhesive channel can be closed with an elastic hose valve 50. The hose valve 50 is fixed on the main body 2 by two-component injection molding and is fitted with a sleeve. Tube 51 extends into adhesive chamber 4. If adhesive is injected through adhesive chamber 3, the opening in sleeve 51 expands under the pressure of the adhesive and adhesive chamber 4 can be filled. After the process, the pressure caused by the adhesive is reduced and the sleeve 51 is at least substantially closed. The injected adhesive thus remains in the adhesive chamber 4. The hose valve here has a certain pressure greater than that of the adhesive. Temperature-resistant, for example even hot-melt adhesives can be used. Optionally, a sleeve can also be arranged in the region of the adhesive channel 3 .

FIG. 15 shows another embodiment of a fitting 1 ″″, in which an elastic film 60 is stretched in the adhesive channel 3 and is fastened circumferentially to the wall of the adhesive channel 3 . In order to fill the adhesive chamber 4 with adhesive, an injection needle 11 ′ converging at the front end is provided, which pierces the membrane 60 and then fills the adhesive chamber 4 with adhesive. After the filling process, the injection needle 11 ′ is withdrawn from the membrane 60 and the adhesive presses the membrane outwards into the front chamber 61 , but cannot or only slightly flows through the closed membrane 60 .

The film 60 is arranged in the adhesive channel 3 . It is also possible to form the film 60 as part of the wall of the adhesive chamber 4 .

FIG. 16 shows yet another modification of the embodiment shown in FIG. 5 . The adhesive channel 3 of the fitting 1 comprises an angled section 71 at the end of which a closing flap 70 is arranged. The closing flap 70 is located in the adhesive chamber 4 and is pretensioned in the closing direction. When the adhesive chamber 4 is filled, the closing flap 70 is opened under the pressure of the adhesive flowing in.

List of reference signs

1 accessories

1' fitting

1″ accessories

1′″ accessories

1″″ accessories

2 subject

2' body

3 Adhesive channels

3' adhesive channel

4 Adhesive cavity

5 protrusions

5' protrusion

6 abutment surface

7 valve face

7' abutment

8 spheres

8' valve

9 torus

10 injection device

11 injection needles

12 injection channels

13 Adhesive

19 ribs

20 connectors

21 insert channel

22 channels

23 Tool Inserts

24 pin

30 lightweight structural panels

31 Cover

32 middle layer

33 end side

35 channel sections

36 openings

37 opening

38 channel sections

40 side walls

41 side wall

42 side wall

43 slots

50 hose valve

51 casing

60 film

61 front cavity

70 closed valve

71 Bend section

Claims (15)

1. accessory (1,1', 1 "; 1 ' ", 1 " ", 1 ' " "), especially for the accessory that is installed in the lightweight structure plate, described accessory has main body (2,2'), in described main body, consist of at least one binder chamber (4), binder passage (3,3') preferably pass in the described binder chamber, binder chamber (4) for element on every side bonding be designed at least part of unlimited, it is characterized in that, on binder chamber (4) and/or at binder passage (3, be provided with at least one 3') and prevent afterwards the device (7 that binder (13) refluxes in filling binder chamber (4), 8; 7', 8', 51,60).

2. accessory according to claim 1 is characterized in that, valve have can move the closure member (8,8') of ground supporting.

3. accessory according to claim 1 and 2 is characterized in that, projection to interior orientation (5,5') is set in binder passage (3,3'), and the entry needle (11) that is used for the tubulose of binder can abut in described projection.

4. accessory according to claim 3 is characterized in that, the projection (5,5') of annular is configured to taper or trapezoidal in cross section.

5. according to claim 3 or 4 described accessories, it is characterized in that, closure member (8,8') can abut on the side towards binder chamber (4) (7,7') of the projection (5,5') of annular.

6. each described accessory in 5 according to claim 1 is characterized in that, closure member (8) is configured to spheroid.

7. each described accessory in 5 according to claim 1 is characterized in that, closure member (8') is constructed to be permeable to rotating valve.

8. accessory according to claim 7 is characterized in that, valve (8') consists of integratedly with main body (2').

9. according to each described accessory in the claims, it is characterized in that, closure member (8,8') by spring pre-tightening in closed position.

10. according to each described accessory in the claims, it is characterized in that, binder passage (3) is connected with binder chamber (4) by at least two parallel channel part sections (35,38).

11. accessory according to claim 10 is characterized in that, described two channel part sections (35,38) have different cross-section areas, particularly differ by more than 20%.

12. according to each described accessory in the claims, it is characterized in that, closure member is configured to flexible flexible pipe section's section (50) or is configured to film (60).

13. according to each described accessory in the claims, it is characterized in that, be provided with at least one coupling (20) at accessory (1,1', 1 ", 1 ' ", 1 " "), be used for being connected with a member.

A 14. lightweight structure plate (30), have two cover plates (31) and a mesosphere (32) that is arranged between these two cover plates (31), it is characterized in that, bonding with described lightweight structure plate (30) according to each described accessory in the claims (1,1', 1 ", 1 ' ", 1 " ").

15. lightweight structure plate according to claim 14 is characterized in that, accessory (1,1', 1 ", 1 ' ", 1 " ") has binder chamber (4) and respectively has at least one binder chamber (4) bonding with one of cover plate (31) in opposite side.

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