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Patent Searching and Data


Title:
A CAPTIVE BOLT SOLUTION
Document Type and Number:
WIPO Patent Application WO/2018/017029
Kind Code:
A1
Abstract:
This invention relates to a captive bolt solution whether with a overmolded vertical captive protrusion (33) which has a threaded surface (331) suitable for thread cut or overmolded horizontal captive protrusion (33) which has proper 5 pointed end for using as a thread both guides the bolt inside the hole (31).

More Like This:
WO/2001/071203FASTENING ELEMENT
JP2005090632BOLT-NUT MECHANISM
Inventors:
KANBUR, Hikmet (Gedelek Mahallesi Gedelek Sokak No:470, Orhangazi/Bursa, 16800, TR)
Application Number:
TR2016/050229
Publication Date:
January 25, 2018
Filing Date:
July 20, 2016
Export Citation:
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Assignee:
KIRPART OTOMOTIV PARCALARI SANAYI VE TICARET ANONIM SIRKETI (Gedelek Koyu, Orhangazi/Bursa, 16800, TR)
International Classes:
F16B37/00; F16B41/00
Foreign References:
EP2407676A12012-01-18
EP2930002A12015-10-14
DE102012209165A12013-12-05
EP2592285A12013-05-15
US20060056936A12006-03-16
US5255647A1993-10-26
DE29511400U11995-09-21
DE19534034A11997-03-20
Other References:
None
Attorney, Agent or Firm:
ANKARA PATENT BUREAU LIMITED (Bestekar Sokak No:10, Kavaklidere, Ankara, 06680, TR)
Download PDF:
Claims:
CLAIMS

1. The captive bolt mechanism (1) which is used to provide a self-captivated mechanism characterized by;

• At least a fastenting part (2), which has a thread on a cylindrical surface,

• At least a pressure face (21), which is protruded from the fastening part (2) and provides a contact surface to decrease the pressure force to the area pressurized by the fastening part (2).

• At least a hollow part (3),

• At least a hole (31), which is positioned on the hollow part (3),

• At least an insert metal bushing (32), which is placed inside the hole (31) to provide robustness to the mechanism,

• At least a protrusion (33), which is protruded through the hole (31) for captivating a fastening part (2), where positioning the fastening part (2) on hollow part (3) to create thread on,

2. The captive bolt mechanism (1) according to claim 1, characterized by at least a threaded surface (331), which is outer surface of the protrusion (33) and which captivates the fastening part (2) coaxial with the axis of hole (31) by the engaging the pitches on the threads of the fastening part

(2).

3. The captive bolt mechanism (1) according to claim 1, characterized by the protrusion (33) is created by molding and is by an elastomer compound also durable enough to thread cutting.

4. The captive bolt mechanism (1) according to claim 1, characterized by a vertically positioned (parallel to the axis of the hole (31)) protrusion (33), which is protruded through the hole (31) and which has proper surface allowing cutting threads to captivate the fastening part (2),

5. The captive bolt mechanism (1) according to claim 1, characterized by a horizontally positioned (perpendicular to the axis of the hole (31)) protrusion (33), which has proper pointed end using as a thread and created by protruding through the hole (31).

Description:
DESCRIPTION

A CAPTIVE BOLT SOLUTION

Technological Area:

This invention relates to captive bolt solutions which are used to assemble plastic parts to each other securely and releasable. In captive bolt assemblies, losing or falling into the gaps in the equipment of bolt is prevented by means of its structure. A correct engaging of bolts to correct threaded holes is also provided for different types of bolts.

Known Situation of the Art: To assemble parts to each other mechanically, especially in case disassemble is needed; bolts are the most preferable solution. To prevent loss of the bolts and to provide a correct installation for different types of bolts and threaded holes it is necessary to use a captive bolt mechanism.

There are various ways exist for a captive bolt mechanism in the known situation of the art. One of these is a captive bolt mechanism with riveting piece. A fixed screw and a riveting piece sleeving the fixed screw. A screw thread which is protruded outwards is arranged on the screw thread part; a through hole is formed in the middle part of the riveting piece to allow the screw thread part to pass through; a ring-shaped stop block which is protruded inward is arranged at the end part, close to the screw head part, of the through hole; the internal diameter of the ring-shaped stop block is smaller than the external diameter of the screw thread and larger than the diameter of the screw thread part.

A captive screw assembly with a knurled end that rotates the captive screw in a hole in which it is mounted as the captive screw is pressed into the hole in another known situation of the art. The lower end of a ferrule of the captive screw assembly terminates within the hole and is flared against the side wall of the hole. In the known situation of the art, the structure of the captive bolt is implemented by whether a cage mechanism or an extra element for this structure. This causes a complex geometry and makes the structure improper with regard to producibility.

Brief Description of the Invention:

It is aimed to embody a captive bolt solution which is easily moldable by means of its simple geometry in this way there is no need to an extra part or there is no need to a cage structure for the captive mechanism. The aim of the invention is to embody a captive bolt mechanism with a self- formed captive structure preferably with 3 or more teeth structures protruded from the body which is preferably plastic material and placed inside of the mounting hole to allow shrink fit.

Detailed Description of the Invention: This invention is explained by following figures detailed:

Figure 1 3D view of the captive bolt structure with the vertical protrusion

Figure 2 Cross section view of the captive bolt structure with the vertical protrusion

Figure 3 View of vertical protrusion structure

Figure 4 3D view of the captive bolt structure with the horizontal protrusion

Figure 5 Cross section view of the captive bolt structure with the horizontal protrusion

Figure 6 View of the horizontal protrusion structure

On these figures there are references. Descriptions of the references are below: 1. Captive bolt mechanism

2. Fastening part

21. Pressure face

3. Hollow part

31. Hole

32. Insert metal bushing

33. Protrusion

331. Threaded surface

Captive bolt mechanism (1) which has self-insert structure by means protrusion (33) essentially comprises:

• At least a fastenting part (2), which has a thread on a cylindrical surface,

• At least a pressure face (21), which is protruded from the fastening part (2) and provides a contact face to decrease the pressure force to the area pressurized by the fastening part (2),

• At least a hollow part (3),

• At least a hole (31), which is positioned on the hollow part (3),

• At least an insert metal bushing (32), which is placed inside the hole (31) to provide robustness to the mechanism,

• At least a protrusion (33), which is protruded through the hole (31) for captivating a fastening part (2), where positioning the fastening part (2) on hollow part (3) to create thread on,

• At least a threaded surface (331), which is outer surface of the protrusion

(33) and which captivates the fastening part (2) by the engaging the pitches on the threads of the fastening part (2).

In an embodiment of the invention, captive bolt mechanism (1) is implemented by a vertically positioned (parallel to the axis of hole (31) captive protrusion (23) which is inside the hole (31). The vertical captive protrusion (31) is created by molding and is by an elastomer compound also strong enough to thread cutting. On the threaded surface (331) of the vertical captive protrusion (33) suitable pitches is cut to provide the fastening part (2) to be screwed.

The fastening part (2) preferably is a bolt.

The insert metal bushing (32) is overmolded inside the hole (31) to increase the robustness. Besides there is a pressure face (21) to increase the joint area and contact surface of the bolt and the hollow part by means of its wide contact surface so that a surface proof enough to face the pressure force is provided.

The fastening part (2) is screwed to the captive bolt mechanism (1) with a few turns in this way the fastening part (2) is captivated inside the captive bolt mechanism (1) coaxial with the axis of the hole (31). Coaxiality is provided by means of the threads on the threaded surface (331). Thereby a robust captive bolt mechanism (1) is obtained. It should be assembled directly by torqueing the bolt head without checking the coaxiality.

In another embodiment of the invention, captive bolt mechanism (1) is implemented by the horizontally positioned (perpendicular to the axis of the hole (31)) captive protrusion (33) which is inside the hole (31). The horizontal captive protrusion (33) is created by molding and is by an elastomer compound. Horizontal captive protrusion (33) has a pointed end which is used as a thread. A single pitch is used for captivate the fastening part (2). The insert metal bushing (32) is overmolded inside the hole (31) to increase the robustness. Besides there is a pressure face (21) to increase the joint area and contact surface of the fastening part (2) and the part by means of its wide contact surface so that a surface proof enough to face the pressure force is provided.

The bolt is screwed to the captive bolt mechanism (1) with a few turns in this way the bolt is captivated inside the captive bolt mechanism (1) coaxial with the axis of the hole (31). Coaxiality is provided by means of the pointed end. Thereby a robust captive bolt mechanism (1) is obtained. It should be assembled directly by torqueing the fastening part (2) head without checking the coaxiality.