Using an oversized threaded rod in a locking oblong hole

Abstract

This invention relates to a method for securing a first portion having a locking elongated hole to a second portion, the method comprising inserting a locking threaded rod through the locking elongated hole into the second portion, wherein the locking threaded rod is excessively wide relative to the width of the locking elongated hole, such that the locking threaded rod widens the locking elongated hole as it passes through it. The invention also relates to an arrangement obtainable using the method, and to an installation kit for performing the method.

Description

Technical Field

[0001] This invention relates to a method for securing a first portion having a locking elongated hole to a second portion. The invention also relates to an arrangement obtainable using the method, and to an installation kit for performing the method. Summary of the Invention

[0002] The objective of this invention is to provide a specific and effective mechanism for fixing a first part to a second part in a height-adjustable manner.

[0003] This invention teaches a method for securing a first portion having a locking elongated hole to a second portion, the method comprising passing a locking threaded rod through the locking elongated hole into the second portion.

[0004] Its features

[0005] The locking threaded rod is too wide relative to the locking elongated hole, causing the locking elongated hole to widen when the locking threaded rod passes through it.

[0006] Therefore, an oversized locking threaded rod passes through the locking elongated hole, which widens the locking elongated hole during this process, thereby creating a maximum undercut width within the locking elongated hole, specifically a maximum local width, in which the locking threaded rod engages accordingly. This can provide a particularly tight fixation in a particularly effective manner—not only through the positive engagement, but also through interlocking at the geometry formed by the material displaced during the widening process.

[0007] At least the thread of the threaded rod is too large relative to the width of the locking elongated hole, i.e., the large diameter is too large. Preferably, the shank of the threaded rod is also too large relative to the width of the locking elongated hole, i.e., the small diameter is too large.

[0008] Particularly preferably, the locking elongated hole has at least one contraction, which is present particularly before the locking threaded rod passes through the locking elongated hole. Therefore, the locking elongated hole has a cloud-like profile. This aids in positioning the threaded rod, thereby further facilitating the method.

[0009] Preferably, the method includes passing a locking threaded rod through a locking elongated hole provided in the first portion and into a circular hole in the second portion. Thus, the second portion has a circular hole at the beginning of the method, which subsequently receives the locking threaded rod. This can further facilitate the method.

[0010] The locking threaded rod can also be too large relative to the diameter of the round hole, causing the locking threaded rod to enlarge the diameter of the round hole as it enters. Specifically, the locking threaded rod can tap the wall of the round hole with threads as it enters. This can provide a particularly good engagement with the second part.

[0011] The locking threaded rod has an advantageous head, i.e., a screw head is provided on it. This can further improve the connection.

[0012] According to another preferred embodiment,

[0013] -The first part has a pre-fixed elongated hole, and

[0014] - Before the locking threaded rod passes through the locking elongated hole into the second part, the first part is pre-fixed to the second part by means of passing the pre-fixing threaded rod through the pre-fixing elongated hole into the second part.

[0015] - The width of the pre-fixed threaded rod relative to the pre-fixed elongated hole is too small, so that the pre-fixed threaded rod will not widen the pre-fixed elongated hole when passing through it.

[0016] Therefore, pre-fixing is applied, where the corresponding pre-fixed elongated hole is not widened. This embodiment is based on the finding that the widening process of locking the elongated hole tends to lift the first part away from the second part, and material accumulation may occur between these parts, which may prevent subsequent tight assembly fixation. The described pre-fixing can effectively counteract this process because it provides tight assembly fixation before the material shifts during the widening process. Furthermore, pre-fixing allows for particularly easy adjustment and / or can improve load transfer capacity.

[0017] The locking threaded rod and the pre-fixed threaded rod preferably have substantially the same dimensions. This further facilitates the process because only a single type of threaded rod needs to be stored, and because it is impossible to confuse the rods.

[0018] The pre-fixed threaded rod is preferably headed, i.e., it has a screw head on it. This can further improve the connection.

[0019] At least one of the first and second parts can be a metal part, specifically a steel part. At least one of the locking threaded rod and the pre-fixing threaded rod can be a metal part, specifically a steel part. Particularly preferably, the first part is a bracket and the second part is a beam, specifically a hollow box beam. The tight height adjustment mechanism provided by the present invention is particularly suitable for this application.

[0020] The present invention also relates to an arrangement obtainable using the method described herein, the arrangement comprising: a first portion having a locking elongated hole; a second portion; and a locking threaded rod penetrating the locking elongated hole into the second portion, wherein the locking elongated hole has a local maximum width, specifically, a strictly local maximum width, wherein the locking threaded rod penetrates the locking elongated hole. Thus, the locking elongated hole has been widened as intended by the locking threaded rod. Specifically, the locking elongated hole may have an internal threaded structure in its wall at the local maximum width, the internal threaded structure mating with the external thread of the locking threaded rod, wherein the external thread of the locking threaded rod engages the internal threaded structure. Specifically, the internal threaded structure has been tapped by the locking threaded rod. At the local maximum width, the locking elongated hole has its maximum width throughout the entire locking elongated hole. According to common definitions, width can be considered as the shorter dimension of the corresponding elongated hole and length can be considered as the longer dimension of the corresponding elongated hole.

[0021] The present invention also relates to an installation kit that can be used to perform the method. Specifically, the kit of the present invention may include: a first part having a locking oblong hole and a pre-fixed oblong hole; a locking threaded rod; and a pre-fixed threaded rod, wherein the locking threaded rod and the pre-fixed threaded rod have substantially the same dimensions, wherein the width of the locking threaded rod relative to the locking oblong hole is excessive, such that the locking threaded rod widens the locking oblong hole when passing through it. Preferably, the width of the pre-fixed threaded rod relative to the pre-fixed oblong hole is excessive, such that the pre-fixed threaded rod does not widen the pre-fixed oblong hole when passing through it.

[0022] The features described herein in conjunction with the method can also be used in conjunction with the arrangement and / or installation kit, and the features described herein in conjunction with the installation kit can also be used in conjunction with the method and / or arrangement. Attached Figure Description

[0023] The invention will now be explained in more detail with reference to preferred exemplary embodiments schematically depicted in the accompanying drawings. Within the scope of the invention, the various features of the exemplary embodiments presented below may be implemented individually or in any combination.

[0024] Figure 1 It is an isometric view of a system including a first part and a second part, which is used in a method for fixing the first part to the second part.

[0025] Figure 2 The stage before the locking threaded rod passes through the arrangement is shown in top, side, and bottom views. Figure 1 This is a highly schematic and detailed view of the system. The dotted lines are projections of the locking threaded rod. In this state, the system can also be referred to as an "installation kit".

[0026] Figure 3 The section shown in section AA, side view, and section BB is the stage after the locking threaded rod has passed through the arrangement. Figure 1 This is a highly schematic and detailed view of the system. In this state, the system can also be referred to as a "layout". Detailed Implementation

[0027] The diagram illustrates a system comprising a first part 10 and a second part 20, the first part being, for example, a corner bracket, and the second part being, for example, a beam, preferably a hollow metal beam.

[0028] The first part 10 includes a locking elongated hole 11. The locking elongated hole 11 is a through hole penetrating the first part 10, and according to the common understanding of an elongated hole, the length of the elongated hole is greater than its width. The locking elongated hole 11 has a contraction portion 12, which forms a partial narrowing of the width of the locking elongated hole 11 to center the threaded rod.

[0029] Furthermore, the first part 10 includes a pre-fixed elongated hole 15. The pre-fixed elongated hole 15 is a through hole penetrating the first part 10, and according to the common understanding of an elongated hole, its length is greater than its width. Compared to the locking elongated hole 11, the pre-fixed elongated hole 15 preferably does not have a constriction portion 12.

[0030] The maximum width of the pre-fixed elongated hole 15 is greater than that of the locking elongated hole 11.

[0031] In addition, the system includes a locking threaded rod 30 and a pre-fixed threaded rod 50. Both the locking threaded rod 30 and the pre-fixed threaded rod 50 are externally threaded, and the thread dimensions of the locking threaded rod 30 and the pre-fixed threaded rod 50 are substantially the same. The locking threaded rod 30 has a screw head 39, and the pre-fixed threaded rod 50 also has a screw head 59.

[0032] If possible Figure 1 As can be seen, additional oblong holes and additional threaded rods can also be provided.

[0033] In an embodiment of the method for securing the first portion 10 to the second portion 20, the first portion 10 is initially positioned adjacent to the second portion 20.

[0034] Subsequently, the pre-fixed threaded rod 50 passes through the pre-fixed elongated hole 15 and is screwed into the second part 20. Specifically, the pre-fixed threaded rod 50 can be self-tapping into the corresponding circular hole provided in the second part 20. The pre-fixed threaded rod 50 is tightened until its screw head 59 secures the first part 10 to the second part 20. Figure 1The final state is shown in the figure. The pre-fixed threaded rod 50 is too small relative to the pre-fixed elongated hole 15, and the pre-fixed threaded rod 50 does not widen the pre-fixed elongated hole 15 when passing through it.

[0035] Subsequently, the locking threaded rod 30 spirally passes through the locking elongated hole 11 and is screwed into the second part 20. Specifically, the locking threaded rod 30 can be self-tapping into the circular hole 22 provided in the second part 20. The locking threaded rod 30 is tightened until its screw head 39 strikes the first part 10. Figure 2 The system prior to the above process is shown. Figure 1 The system during this process is shown, and Figure 3 The system is shown at the end of this process. The locking threaded rod 30 is too large relative to the locking elongated hole 11. In this embodiment, the large diameter d of the locking threaded rod 30 is... maj and small diameter d min Both are too large compared to the locking elongated hole 11, but as an alternative, it is conceivable to only have a large diameter d. maj In embodiments where the locking oblong hole 11 is too large, the locking threaded rod 30 threadedly cuts into the hole wall of the locking oblong hole 11 and locally widens it. This creates a local width maximum 95, where the locking threaded rod 30 penetrates the locking oblong hole 11. Engaging the locking threaded rod 30 in the local width maximum 95 provides particularly good lateral locking.

[0036] The locking threaded rod 30 is also too large relative to the round hole 22. Therefore, the locking threaded rod 30 also widens the round hole 22 when entering the second part 20.

[0037] For example, if the wall strength of the first part 10 is 3 mm, the locking elongated hole 11 can have a groove width of 7 mm, and if the wall strength of the first part 10 is 4 mm, the locking elongated hole 11 can have a groove width of 8 mm. The locking elongated hole 11 can be used multiple times in different positions to allow for repositioning. This can be aided by the contraction portion 12. The locking elongated hole 11 can have extensions at its opposite ends, which counteracts the tendency of the locking threaded rod 30 to move within the locking elongated hole 11 when one of the opposite ends of the locking elongated hole 11 is cut (i.e., when not only the opposite wall of the locking elongated hole 11 is cut, but also one of its end walls).

Claims

1. A method for securing a first portion (10) having a locking elongated hole (11) to a second portion (20), the method comprising inserting a locking threaded rod (30) through the locking elongated hole (11) into the second portion (20), Its features - The locking threaded rod (30) is too wide relative to the locking elongated hole (11), causing the locking threaded rod (30) to widen the locking elongated hole (11) when passing through it, thereby creating a maximum local width undercut within the locking elongated hole (11), in which the locking threaded rod (30) engages accordingly. - The first part (10) has a pre-fixed elongated hole (15), and - Before the locking threaded rod (30) passes through the locking elongated hole (11) into the second part (20), the first part (10) is pre-fixed to the second part (20) by means of passing the pre-fixed threaded rod (50) through the pre-fixed elongated hole (15) into the second part (20). -The width of the pre-fixed threaded rod (50) relative to the pre-fixed elongated hole (15) is too small, so that the pre-fixed threaded rod (50) does not widen the pre-fixed elongated hole (15) when it passes through the pre-fixed elongated hole (15).

2. The method according to claim 1, Its features The locking elongated hole (11) has at least one constriction portion (12).

3. The method according to any one of the preceding claims, Its features The method includes passing the locking threaded rod (30) through the locking elongated hole (11) provided in the first part (10) and into the round hole (22) in the second part (20).

4. The method according to claim 3, Its features The locking threaded rod (30) is too large relative to the diameter of the circular hole (22), causing the locking threaded rod (30) to enlarge the diameter of the circular hole (22) when it enters the circular hole (22).

5. The method according to claim 1 or 2, Its features The locking threaded rod (30) has a head.

6. The method according to claim 1, Its features The locking threaded rod (30) and the pre-fixed threaded rod (50) have the same dimensions.

7. The method according to claim 1 or 2, Its features The first part (10) is a bracket and the second part (20) is a beam.

8. A fixing device, the fixing device comprising: The first part (10) has a locking elongated hole (11) and a pre-fixed elongated hole (15); the second part (20); and a locking threaded rod (30) that penetrates the locking elongated hole (11) and enters the second part (20); And a pre-fixed threaded rod (50), characterized in that - The locking elongated hole (11) has a strict local width maximum value (95), wherein the locking threaded rod (30) engages accordingly. - The width of the pre-fixed threaded rod (50) relative to the pre-fixed elongated hole (15) is too small, so that the pre-fixed threaded rod (50) will not widen the pre-fixed elongated hole (15) when it passes through the pre-fixed elongated hole (15).

9. The fixing device according to claim 8, Its features The first part (10) is a bracket and the second part (20) is a beam.

10. An installation kit comprising: The first part (10) has a locking elongated hole (11) and a pre-fixed elongated hole (15); a locking threaded rod (30); and a pre-fixed threaded rod (50), wherein the locking threaded rod (30) and the pre-fixed threaded rod (50) have the same dimensions, wherein the locking threaded rod (30) is too large relative to the width of the locking elongated hole (11) such that the locking threaded rod (30) widens the locking elongated hole (11) when passing through the locking elongated hole (11), thereby creating a maximum local width undercut within the locking elongated hole (11), wherein the locking threaded rod (30) engages accordingly; wherein the pre-fixed threaded rod (50) is too small relative to the width of the pre-fixed elongated hole (15) such that the pre-fixed threaded rod (50) does not widen the pre-fixed elongated hole (15) when passing through the pre-fixed elongated hole (15).

11. The installation kit according to claim 10, Its features The first part (10) is a bracket.

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