Multiple-joint hinges GN 7231 are installed on the inside of flaps, hatches and doors to save space and ensure protection against vandalism. The hinges have a maximum opening angle of 90°, making them perfect for use with thick door leaves.
Use of this hinge type leaves housing exteriors free of attachments that do not match the design or that should be avoided entirely in the interests of fast and easy cleaning.
Multiple-joint hinges are typically used in pairs, meaning that one L type and one R type is used per opening. For higher loads, e.g. from large hatches, these can be supplemented with additional hinges of any type.
Body
Stainless steelNI AISI 304
Matte, tumbled finishMT
Friction bearing
Bronze, self-lubricated
RoHS
Spacer Plates GN 7247.2
Spacer Plates with Tapped Holes GN 7247.4
Mounting Plates with Threaded Studs GN 7247.6
Other materials
Other finishes
Other assembly angle brackets
Other opening angles
Other max. wall thicknesses
Other lifting motion
| L | Left-hand assembly angle bracket |
| R | Right-hand assembly angle bracket |
| l1 | d | h1 | h2 | h3 | l2 | l3 | l4 | l5 | l6 | l7 | l8 | l9 | m1 | m2 | r | s | x | y |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.57 | 0.21 | 0.30 | 1.10 | 0.10 | 1.02 | 1.42 | 3.07 | 3.74 | 0.94 | 2.98 | 0.94 | 3.38 | 0.98 | 0.20 | 3.05 | 0.16 | 0.43 | 1.14 |
| 1.97 | 0.26 | 0.39 | 1.38 | 0.10 | 1.38 | 1.81 | 3.98 | 4.96 | 1.46 | 3.85 | 1.46 | 4.28 | 1.18 | 0.24 | 3.84 | 0.20 | 0.75 | 1.46 |
| 2.36 | 0.33 | 0.49 | 1.57 | 0.10 | 1.57 | 2.40 | 4.96 | 6.42 | 2.52 | 4.64 | 2.52 | 5.46 | 1.42 | 0.31 | 5.00 | 0.20 | 0.87 | 1.85 |
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Multiple-joint hinges can be installed on the housing with the slotted holes of the assembly angle brackets that are either perpendicular or parallel to the hinge axis. This results in the two pivot characteristics depicted. |
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Multiple-joint hinges can be adjusted in three planes during installation. For example, this allows compensation for tolerances or establishing of required compressive forces for seals. |
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Flaps, hatches and doors can be inset, surface-mounted or mitered. The maximum wall thicknesses and bend sizes for planned sheet metal constructions arise from the respective installation type.
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The design variants shown represent standard installation conditions. If the installation position of the hinge is changed or one of the two wall thickness dimensions s or b are lower, the maximum achievable dimensions change independently of each other. This makes it possible in some cases to work with larger wall thickness dimensions than those specified with the same hinge size. A simple design check via CAD or a test setup is therefore recommended. |
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The maximum load capacity of the multiple-joint hinges specified below applies to the standard use cases and serves for orientation in the case of deviating applications. The resulting forces lead to slight elastic deformation, which can be compensated for by means of the adjustment options, if necessary. |
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| Min | Max | Price |
|---|---|---|
| 1 | 9 | $116.87 |
| 10 | 24 | $107.13 |
| 25 | 49 | $97.40 |
| ≥ 50 | $87.66 |
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